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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [bfd/] [elf32-ppc.c] - Blame information for rev 156

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1 38 julius
/* PowerPC-specific support for 32-bit ELF
2
   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3
   2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
4
   Written by Ian Lance Taylor, Cygnus Support.
5
 
6
   This file is part of BFD, the Binary File Descriptor library.
7
 
8
   This program is free software; you can redistribute it and/or modify
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 3 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program; if not, write to the
20
   Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21
   Boston, MA 02110-1301, USA.  */
22
 
23
 
24
/* This file is based on a preliminary PowerPC ELF ABI.  The
25
   information may not match the final PowerPC ELF ABI.  It includes
26
   suggestions from the in-progress Embedded PowerPC ABI, and that
27
   information may also not match.  */
28
 
29
#include "sysdep.h"
30
#include <stdarg.h>
31
#include "bfd.h"
32
#include "bfdlink.h"
33
#include "libbfd.h"
34
#include "elf-bfd.h"
35
#include "elf/ppc.h"
36
#include "elf32-ppc.h"
37
#include "elf-vxworks.h"
38
 
39
/* RELA relocations are used here.  */
40
 
41
static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42
  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
static bfd_reloc_status_type ppc_elf_unhandled_reloc
44
  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
 
46
/* Branch prediction bit for branch taken relocs.  */
47
#define BRANCH_PREDICT_BIT 0x200000
48
/* Mask to set RA in memory instructions.  */
49
#define RA_REGISTER_MASK 0x001f0000
50
/* Value to shift register by to insert RA.  */
51
#define RA_REGISTER_SHIFT 16
52
 
53
/* The name of the dynamic interpreter.  This is put in the .interp
54
   section.  */
55
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
 
57
/* For old-style PLT.  */
58
/* The number of single-slot PLT entries (the rest use two slots).  */
59
#define PLT_NUM_SINGLE_ENTRIES 8192
60
 
61
/* For new-style .glink and .plt.  */
62
#define GLINK_PLTRESOLVE 16*4
63
#define GLINK_ENTRY_SIZE 4*4
64
 
65
/* VxWorks uses its own plt layout, filled in by the static linker.  */
66
 
67
/* The standard VxWorks PLT entry.  */
68
#define VXWORKS_PLT_ENTRY_SIZE 32
69
static const bfd_vma ppc_elf_vxworks_plt_entry
70
    [VXWORKS_PLT_ENTRY_SIZE / 4] =
71
  {
72
    0x3d800000, /* lis     r12,0                 */
73
    0x818c0000, /* lwz     r12,0(r12)            */
74
    0x7d8903a6, /* mtctr   r12                   */
75
    0x4e800420, /* bctr                          */
76
    0x39600000, /* li      r11,0                 */
77
    0x48000000, /* b       14 <.PLT0resolve+0x4> */
78
    0x60000000, /* nop                           */
79
    0x60000000, /* nop                           */
80
  };
81
static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82
    [VXWORKS_PLT_ENTRY_SIZE / 4] =
83
  {
84
    0x3d9e0000, /* addis r12,r30,0 */
85
    0x818c0000, /* lwz   r12,0(r12) */
86
    0x7d8903a6, /* mtctr r12 */
87
    0x4e800420, /* bctr */
88
    0x39600000, /* li    r11,0 */
89
    0x48000000, /* b     14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90
    0x60000000, /* nop */
91
    0x60000000, /* nop */
92
  };
93
 
94
/* The initial VxWorks PLT entry.  */
95
#define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96
static const bfd_vma ppc_elf_vxworks_plt0_entry
97
    [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98
  {
99
    0x3d800000, /* lis     r12,0        */
100
    0x398c0000, /* addi    r12,r12,0    */
101
    0x800c0008, /* lwz     r0,8(r12)    */
102
    0x7c0903a6, /* mtctr   r0           */
103
    0x818c0004, /* lwz     r12,4(r12)   */
104
    0x4e800420, /* bctr                 */
105
    0x60000000, /* nop                  */
106
    0x60000000, /* nop                  */
107
  };
108
static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109
    [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110
  {
111
    0x819e0008, /* lwz   r12,8(r30) */
112
    0x7d8903a6, /* mtctr r12        */
113
    0x819e0004, /* lwz   r12,4(r30) */
114
    0x4e800420, /* bctr             */
115
    0x60000000, /* nop              */
116
    0x60000000, /* nop              */
117
    0x60000000, /* nop              */
118
    0x60000000, /* nop              */
119
  };
120
 
121
/* For executables, we have some additional relocations in
122
   .rela.plt.unloaded, for the kernel loader.  */
123
 
124
/* The number of non-JMP_SLOT relocations per PLT0 slot. */
125
#define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126
/* The number of relocations in the PLTResolve slot. */
127
#define VXWORKS_PLTRESOLVE_RELOCS 2
128
/* The number of relocations in the PLTResolve slot when when creating
129
   a shared library. */
130
#define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
 
132
/* Some instructions.  */
133
#define ADDIS_11_11     0x3d6b0000
134
#define ADDIS_11_30     0x3d7e0000
135
#define ADDIS_12_12     0x3d8c0000
136
#define ADDI_11_11      0x396b0000
137
#define ADD_0_11_11     0x7c0b5a14
138
#define ADD_11_0_11     0x7d605a14
139
#define B               0x48000000
140
#define BCL_20_31       0x429f0005
141
#define BCTR            0x4e800420
142
#define LIS_11          0x3d600000
143
#define LIS_12          0x3d800000
144
#define LWZU_0_12       0x840c0000
145
#define LWZ_0_12        0x800c0000
146
#define LWZ_11_11       0x816b0000
147
#define LWZ_11_30       0x817e0000
148
#define LWZ_12_12       0x818c0000
149
#define MFLR_0          0x7c0802a6
150
#define MFLR_12         0x7d8802a6
151
#define MTCTR_0         0x7c0903a6
152
#define MTCTR_11        0x7d6903a6
153
#define MTLR_0          0x7c0803a6
154
#define NOP             0x60000000
155
#define SUB_11_11_12    0x7d6c5850
156
 
157
/* Offset of tp and dtp pointers from start of TLS block.  */
158
#define TP_OFFSET       0x7000
159
#define DTP_OFFSET      0x8000
160
 
161
static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
162
 
163
static reloc_howto_type ppc_elf_howto_raw[] = {
164
  /* This reloc does nothing.  */
165
  HOWTO (R_PPC_NONE,            /* type */
166
         0,                      /* rightshift */
167
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
168
         32,                    /* bitsize */
169
         FALSE,                 /* pc_relative */
170
         0,                      /* bitpos */
171
         complain_overflow_bitfield, /* complain_on_overflow */
172
         bfd_elf_generic_reloc, /* special_function */
173
         "R_PPC_NONE",          /* name */
174
         FALSE,                 /* partial_inplace */
175
         0,                      /* src_mask */
176
         0,                      /* dst_mask */
177
         FALSE),                /* pcrel_offset */
178
 
179
  /* A standard 32 bit relocation.  */
180
  HOWTO (R_PPC_ADDR32,          /* type */
181
         0,                      /* rightshift */
182
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
183
         32,                    /* bitsize */
184
         FALSE,                 /* pc_relative */
185
         0,                      /* bitpos */
186
         complain_overflow_bitfield, /* complain_on_overflow */
187
         bfd_elf_generic_reloc, /* special_function */
188
         "R_PPC_ADDR32",        /* name */
189
         FALSE,                 /* partial_inplace */
190
         0,                      /* src_mask */
191
         0xffffffff,            /* dst_mask */
192
         FALSE),                /* pcrel_offset */
193
 
194
  /* An absolute 26 bit branch; the lower two bits must be zero.
195
     FIXME: we don't check that, we just clear them.  */
196
  HOWTO (R_PPC_ADDR24,          /* type */
197
         0,                      /* rightshift */
198
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
199
         26,                    /* bitsize */
200
         FALSE,                 /* pc_relative */
201
         0,                      /* bitpos */
202
         complain_overflow_bitfield, /* complain_on_overflow */
203
         bfd_elf_generic_reloc, /* special_function */
204
         "R_PPC_ADDR24",        /* name */
205
         FALSE,                 /* partial_inplace */
206
         0,                      /* src_mask */
207
         0x3fffffc,             /* dst_mask */
208
         FALSE),                /* pcrel_offset */
209
 
210
  /* A standard 16 bit relocation.  */
211
  HOWTO (R_PPC_ADDR16,          /* type */
212
         0,                      /* rightshift */
213
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
214
         16,                    /* bitsize */
215
         FALSE,                 /* pc_relative */
216
         0,                      /* bitpos */
217
         complain_overflow_bitfield, /* complain_on_overflow */
218
         bfd_elf_generic_reloc, /* special_function */
219
         "R_PPC_ADDR16",        /* name */
220
         FALSE,                 /* partial_inplace */
221
         0,                      /* src_mask */
222
         0xffff,                /* dst_mask */
223
         FALSE),                /* pcrel_offset */
224
 
225
  /* A 16 bit relocation without overflow.  */
226
  HOWTO (R_PPC_ADDR16_LO,       /* type */
227
         0,                      /* rightshift */
228
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
229
         16,                    /* bitsize */
230
         FALSE,                 /* pc_relative */
231
         0,                      /* bitpos */
232
         complain_overflow_dont,/* complain_on_overflow */
233
         bfd_elf_generic_reloc, /* special_function */
234
         "R_PPC_ADDR16_LO",     /* name */
235
         FALSE,                 /* partial_inplace */
236
         0,                      /* src_mask */
237
         0xffff,                /* dst_mask */
238
         FALSE),                /* pcrel_offset */
239
 
240
  /* The high order 16 bits of an address.  */
241
  HOWTO (R_PPC_ADDR16_HI,       /* type */
242
         16,                    /* rightshift */
243
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
244
         16,                    /* bitsize */
245
         FALSE,                 /* pc_relative */
246
         0,                      /* bitpos */
247
         complain_overflow_dont, /* complain_on_overflow */
248
         bfd_elf_generic_reloc, /* special_function */
249
         "R_PPC_ADDR16_HI",     /* name */
250
         FALSE,                 /* partial_inplace */
251
         0,                      /* src_mask */
252
         0xffff,                /* dst_mask */
253
         FALSE),                /* pcrel_offset */
254
 
255
  /* The high order 16 bits of an address, plus 1 if the contents of
256
     the low 16 bits, treated as a signed number, is negative.  */
257
  HOWTO (R_PPC_ADDR16_HA,       /* type */
258
         16,                    /* rightshift */
259
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
260
         16,                    /* bitsize */
261
         FALSE,                 /* pc_relative */
262
         0,                      /* bitpos */
263
         complain_overflow_dont, /* complain_on_overflow */
264
         ppc_elf_addr16_ha_reloc, /* special_function */
265
         "R_PPC_ADDR16_HA",     /* name */
266
         FALSE,                 /* partial_inplace */
267
         0,                      /* src_mask */
268
         0xffff,                /* dst_mask */
269
         FALSE),                /* pcrel_offset */
270
 
271
  /* An absolute 16 bit branch; the lower two bits must be zero.
272
     FIXME: we don't check that, we just clear them.  */
273
  HOWTO (R_PPC_ADDR14,          /* type */
274
         0,                      /* rightshift */
275
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
276
         16,                    /* bitsize */
277
         FALSE,                 /* pc_relative */
278
         0,                      /* bitpos */
279
         complain_overflow_bitfield, /* complain_on_overflow */
280
         bfd_elf_generic_reloc, /* special_function */
281
         "R_PPC_ADDR14",        /* name */
282
         FALSE,                 /* partial_inplace */
283
         0,                      /* src_mask */
284
         0xfffc,                /* dst_mask */
285
         FALSE),                /* pcrel_offset */
286
 
287
  /* An absolute 16 bit branch, for which bit 10 should be set to
288
     indicate that the branch is expected to be taken.  The lower two
289
     bits must be zero.  */
290
  HOWTO (R_PPC_ADDR14_BRTAKEN,  /* type */
291
         0,                      /* rightshift */
292
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
293
         16,                    /* bitsize */
294
         FALSE,                 /* pc_relative */
295
         0,                      /* bitpos */
296
         complain_overflow_bitfield, /* complain_on_overflow */
297
         bfd_elf_generic_reloc, /* special_function */
298
         "R_PPC_ADDR14_BRTAKEN",/* name */
299
         FALSE,                 /* partial_inplace */
300
         0,                      /* src_mask */
301
         0xfffc,                /* dst_mask */
302
         FALSE),                /* pcrel_offset */
303
 
304
  /* An absolute 16 bit branch, for which bit 10 should be set to
305
     indicate that the branch is not expected to be taken.  The lower
306
     two bits must be zero.  */
307
  HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
308
         0,                      /* rightshift */
309
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
310
         16,                    /* bitsize */
311
         FALSE,                 /* pc_relative */
312
         0,                      /* bitpos */
313
         complain_overflow_bitfield, /* complain_on_overflow */
314
         bfd_elf_generic_reloc, /* special_function */
315
         "R_PPC_ADDR14_BRNTAKEN",/* name */
316
         FALSE,                 /* partial_inplace */
317
         0,                      /* src_mask */
318
         0xfffc,                /* dst_mask */
319
         FALSE),                /* pcrel_offset */
320
 
321
  /* A relative 26 bit branch; the lower two bits must be zero.  */
322
  HOWTO (R_PPC_REL24,           /* type */
323
         0,                      /* rightshift */
324
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
325
         26,                    /* bitsize */
326
         TRUE,                  /* pc_relative */
327
         0,                      /* bitpos */
328
         complain_overflow_signed, /* complain_on_overflow */
329
         bfd_elf_generic_reloc, /* special_function */
330
         "R_PPC_REL24",         /* name */
331
         FALSE,                 /* partial_inplace */
332
         0,                      /* src_mask */
333
         0x3fffffc,             /* dst_mask */
334
         TRUE),                 /* pcrel_offset */
335
 
336
  /* A relative 16 bit branch; the lower two bits must be zero.  */
337
  HOWTO (R_PPC_REL14,           /* type */
338
         0,                      /* rightshift */
339
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
340
         16,                    /* bitsize */
341
         TRUE,                  /* pc_relative */
342
         0,                      /* bitpos */
343
         complain_overflow_signed, /* complain_on_overflow */
344
         bfd_elf_generic_reloc, /* special_function */
345
         "R_PPC_REL14",         /* name */
346
         FALSE,                 /* partial_inplace */
347
         0,                      /* src_mask */
348
         0xfffc,                /* dst_mask */
349
         TRUE),                 /* pcrel_offset */
350
 
351
  /* A relative 16 bit branch.  Bit 10 should be set to indicate that
352
     the branch is expected to be taken.  The lower two bits must be
353
     zero.  */
354
  HOWTO (R_PPC_REL14_BRTAKEN,   /* type */
355
         0,                      /* rightshift */
356
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
357
         16,                    /* bitsize */
358
         TRUE,                  /* pc_relative */
359
         0,                      /* bitpos */
360
         complain_overflow_signed, /* complain_on_overflow */
361
         bfd_elf_generic_reloc, /* special_function */
362
         "R_PPC_REL14_BRTAKEN", /* name */
363
         FALSE,                 /* partial_inplace */
364
         0,                      /* src_mask */
365
         0xfffc,                /* dst_mask */
366
         TRUE),                 /* pcrel_offset */
367
 
368
  /* A relative 16 bit branch.  Bit 10 should be set to indicate that
369
     the branch is not expected to be taken.  The lower two bits must
370
     be zero.  */
371
  HOWTO (R_PPC_REL14_BRNTAKEN,  /* type */
372
         0,                      /* rightshift */
373
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
374
         16,                    /* bitsize */
375
         TRUE,                  /* pc_relative */
376
         0,                      /* bitpos */
377
         complain_overflow_signed, /* complain_on_overflow */
378
         bfd_elf_generic_reloc, /* special_function */
379
         "R_PPC_REL14_BRNTAKEN",/* name */
380
         FALSE,                 /* partial_inplace */
381
         0,                      /* src_mask */
382
         0xfffc,                /* dst_mask */
383
         TRUE),                 /* pcrel_offset */
384
 
385
  /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
386
     symbol.  */
387
  HOWTO (R_PPC_GOT16,           /* type */
388
         0,                      /* rightshift */
389
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
390
         16,                    /* bitsize */
391
         FALSE,                 /* pc_relative */
392
         0,                      /* bitpos */
393
         complain_overflow_signed, /* complain_on_overflow */
394
         bfd_elf_generic_reloc, /* special_function */
395
         "R_PPC_GOT16",         /* name */
396
         FALSE,                 /* partial_inplace */
397
         0,                      /* src_mask */
398
         0xffff,                /* dst_mask */
399
         FALSE),                /* pcrel_offset */
400
 
401
  /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
402
     the symbol.  */
403
  HOWTO (R_PPC_GOT16_LO,        /* type */
404
         0,                      /* rightshift */
405
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
406
         16,                    /* bitsize */
407
         FALSE,                 /* pc_relative */
408
         0,                      /* bitpos */
409
         complain_overflow_dont, /* complain_on_overflow */
410
         bfd_elf_generic_reloc, /* special_function */
411
         "R_PPC_GOT16_LO",      /* name */
412
         FALSE,                 /* partial_inplace */
413
         0,                      /* src_mask */
414
         0xffff,                /* dst_mask */
415
         FALSE),                /* pcrel_offset */
416
 
417
  /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
418
     the symbol.  */
419
  HOWTO (R_PPC_GOT16_HI,        /* type */
420
         16,                    /* rightshift */
421
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
422
         16,                    /* bitsize */
423
         FALSE,                 /* pc_relative */
424
         0,                      /* bitpos */
425
         complain_overflow_bitfield, /* complain_on_overflow */
426
         bfd_elf_generic_reloc, /* special_function */
427
         "R_PPC_GOT16_HI",      /* name */
428
         FALSE,                 /* partial_inplace */
429
         0,                      /* src_mask */
430
         0xffff,                /* dst_mask */
431
         FALSE),                 /* pcrel_offset */
432
 
433
  /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
434
     the symbol.  */
435
  HOWTO (R_PPC_GOT16_HA,        /* type */
436
         16,                    /* rightshift */
437
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
438
         16,                    /* bitsize */
439
         FALSE,                 /* pc_relative */
440
         0,                      /* bitpos */
441
         complain_overflow_bitfield, /* complain_on_overflow */
442
         ppc_elf_addr16_ha_reloc, /* special_function */
443
         "R_PPC_GOT16_HA",      /* name */
444
         FALSE,                 /* partial_inplace */
445
         0,                      /* src_mask */
446
         0xffff,                /* dst_mask */
447
         FALSE),                /* pcrel_offset */
448
 
449
  /* Like R_PPC_REL24, but referring to the procedure linkage table
450
     entry for the symbol.  */
451
  HOWTO (R_PPC_PLTREL24,        /* type */
452
         0,                      /* rightshift */
453
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
454
         26,                    /* bitsize */
455
         TRUE,                  /* pc_relative */
456
         0,                      /* bitpos */
457
         complain_overflow_signed,  /* complain_on_overflow */
458
         bfd_elf_generic_reloc, /* special_function */
459
         "R_PPC_PLTREL24",      /* name */
460
         FALSE,                 /* partial_inplace */
461
         0,                      /* src_mask */
462
         0x3fffffc,             /* dst_mask */
463
         TRUE),                 /* pcrel_offset */
464
 
465
  /* This is used only by the dynamic linker.  The symbol should exist
466
     both in the object being run and in some shared library.  The
467
     dynamic linker copies the data addressed by the symbol from the
468
     shared library into the object, because the object being
469
     run has to have the data at some particular address.  */
470
  HOWTO (R_PPC_COPY,            /* type */
471
         0,                      /* rightshift */
472
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
473
         32,                    /* bitsize */
474
         FALSE,                 /* pc_relative */
475
         0,                      /* bitpos */
476
         complain_overflow_bitfield, /* complain_on_overflow */
477
         bfd_elf_generic_reloc,  /* special_function */
478
         "R_PPC_COPY",          /* name */
479
         FALSE,                 /* partial_inplace */
480
         0,                      /* src_mask */
481
         0,                      /* dst_mask */
482
         FALSE),                /* pcrel_offset */
483
 
484
  /* Like R_PPC_ADDR32, but used when setting global offset table
485
     entries.  */
486
  HOWTO (R_PPC_GLOB_DAT,        /* type */
487
         0,                      /* rightshift */
488
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
489
         32,                    /* bitsize */
490
         FALSE,                 /* pc_relative */
491
         0,                      /* bitpos */
492
         complain_overflow_bitfield, /* complain_on_overflow */
493
         bfd_elf_generic_reloc,  /* special_function */
494
         "R_PPC_GLOB_DAT",      /* name */
495
         FALSE,                 /* partial_inplace */
496
         0,                      /* src_mask */
497
         0xffffffff,            /* dst_mask */
498
         FALSE),                /* pcrel_offset */
499
 
500
  /* Marks a procedure linkage table entry for a symbol.  */
501
  HOWTO (R_PPC_JMP_SLOT,        /* type */
502
         0,                      /* rightshift */
503
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
504
         32,                    /* bitsize */
505
         FALSE,                 /* pc_relative */
506
         0,                      /* bitpos */
507
         complain_overflow_bitfield, /* complain_on_overflow */
508
         bfd_elf_generic_reloc,  /* special_function */
509
         "R_PPC_JMP_SLOT",      /* name */
510
         FALSE,                 /* partial_inplace */
511
         0,                      /* src_mask */
512
         0,                      /* dst_mask */
513
         FALSE),                /* pcrel_offset */
514
 
515
  /* Used only by the dynamic linker.  When the object is run, this
516
     longword is set to the load address of the object, plus the
517
     addend.  */
518
  HOWTO (R_PPC_RELATIVE,        /* type */
519
         0,                      /* rightshift */
520
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
521
         32,                    /* bitsize */
522
         FALSE,                 /* pc_relative */
523
         0,                      /* bitpos */
524
         complain_overflow_bitfield, /* complain_on_overflow */
525
         bfd_elf_generic_reloc,  /* special_function */
526
         "R_PPC_RELATIVE",      /* name */
527
         FALSE,                 /* partial_inplace */
528
         0,                      /* src_mask */
529
         0xffffffff,            /* dst_mask */
530
         FALSE),                /* pcrel_offset */
531
 
532
  /* Like R_PPC_REL24, but uses the value of the symbol within the
533
     object rather than the final value.  Normally used for
534
     _GLOBAL_OFFSET_TABLE_.  */
535
  HOWTO (R_PPC_LOCAL24PC,       /* type */
536
         0,                      /* rightshift */
537
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
538
         26,                    /* bitsize */
539
         TRUE,                  /* pc_relative */
540
         0,                      /* bitpos */
541
         complain_overflow_signed, /* complain_on_overflow */
542
         bfd_elf_generic_reloc, /* special_function */
543
         "R_PPC_LOCAL24PC",     /* name */
544
         FALSE,                 /* partial_inplace */
545
         0,                      /* src_mask */
546
         0x3fffffc,             /* dst_mask */
547
         TRUE),                 /* pcrel_offset */
548
 
549
  /* Like R_PPC_ADDR32, but may be unaligned.  */
550
  HOWTO (R_PPC_UADDR32,         /* type */
551
         0,                      /* rightshift */
552
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
553
         32,                    /* bitsize */
554
         FALSE,                 /* pc_relative */
555
         0,                      /* bitpos */
556
         complain_overflow_bitfield, /* complain_on_overflow */
557
         bfd_elf_generic_reloc, /* special_function */
558
         "R_PPC_UADDR32",       /* name */
559
         FALSE,                 /* partial_inplace */
560
         0,                      /* src_mask */
561
         0xffffffff,            /* dst_mask */
562
         FALSE),                /* pcrel_offset */
563
 
564
  /* Like R_PPC_ADDR16, but may be unaligned.  */
565
  HOWTO (R_PPC_UADDR16,         /* type */
566
         0,                      /* rightshift */
567
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
568
         16,                    /* bitsize */
569
         FALSE,                 /* pc_relative */
570
         0,                      /* bitpos */
571
         complain_overflow_bitfield, /* complain_on_overflow */
572
         bfd_elf_generic_reloc, /* special_function */
573
         "R_PPC_UADDR16",       /* name */
574
         FALSE,                 /* partial_inplace */
575
         0,                      /* src_mask */
576
         0xffff,                /* dst_mask */
577
         FALSE),                /* pcrel_offset */
578
 
579
  /* 32-bit PC relative */
580
  HOWTO (R_PPC_REL32,           /* type */
581
         0,                      /* rightshift */
582
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
583
         32,                    /* bitsize */
584
         TRUE,                  /* pc_relative */
585
         0,                      /* bitpos */
586
         complain_overflow_bitfield, /* complain_on_overflow */
587
         bfd_elf_generic_reloc, /* special_function */
588
         "R_PPC_REL32",         /* name */
589
         FALSE,                 /* partial_inplace */
590
         0,                      /* src_mask */
591
         0xffffffff,            /* dst_mask */
592
         TRUE),                 /* pcrel_offset */
593
 
594
  /* 32-bit relocation to the symbol's procedure linkage table.
595
     FIXME: not supported.  */
596
  HOWTO (R_PPC_PLT32,           /* type */
597
         0,                      /* rightshift */
598
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
599
         32,                    /* bitsize */
600
         FALSE,                 /* pc_relative */
601
         0,                      /* bitpos */
602
         complain_overflow_bitfield, /* complain_on_overflow */
603
         bfd_elf_generic_reloc, /* special_function */
604
         "R_PPC_PLT32",         /* name */
605
         FALSE,                 /* partial_inplace */
606
         0,                      /* src_mask */
607
         0,                      /* dst_mask */
608
         FALSE),                /* pcrel_offset */
609
 
610
  /* 32-bit PC relative relocation to the symbol's procedure linkage table.
611
     FIXME: not supported.  */
612
  HOWTO (R_PPC_PLTREL32,        /* type */
613
         0,                      /* rightshift */
614
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
615
         32,                    /* bitsize */
616
         TRUE,                  /* pc_relative */
617
         0,                      /* bitpos */
618
         complain_overflow_bitfield, /* complain_on_overflow */
619
         bfd_elf_generic_reloc, /* special_function */
620
         "R_PPC_PLTREL32",      /* name */
621
         FALSE,                 /* partial_inplace */
622
         0,                      /* src_mask */
623
         0,                      /* dst_mask */
624
         TRUE),                 /* pcrel_offset */
625
 
626
  /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
627
     the symbol.  */
628
  HOWTO (R_PPC_PLT16_LO,        /* type */
629
         0,                      /* rightshift */
630
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
631
         16,                    /* bitsize */
632
         FALSE,                 /* pc_relative */
633
         0,                      /* bitpos */
634
         complain_overflow_dont, /* complain_on_overflow */
635
         bfd_elf_generic_reloc, /* special_function */
636
         "R_PPC_PLT16_LO",      /* name */
637
         FALSE,                 /* partial_inplace */
638
         0,                      /* src_mask */
639
         0xffff,                /* dst_mask */
640
         FALSE),                /* pcrel_offset */
641
 
642
  /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
643
     the symbol.  */
644
  HOWTO (R_PPC_PLT16_HI,        /* type */
645
         16,                    /* rightshift */
646
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
647
         16,                    /* bitsize */
648
         FALSE,                 /* pc_relative */
649
         0,                      /* bitpos */
650
         complain_overflow_bitfield, /* complain_on_overflow */
651
         bfd_elf_generic_reloc, /* special_function */
652
         "R_PPC_PLT16_HI",      /* name */
653
         FALSE,                 /* partial_inplace */
654
         0,                      /* src_mask */
655
         0xffff,                /* dst_mask */
656
         FALSE),                 /* pcrel_offset */
657
 
658
  /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
659
     the symbol.  */
660
  HOWTO (R_PPC_PLT16_HA,        /* type */
661
         16,                    /* rightshift */
662
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
663
         16,                    /* bitsize */
664
         FALSE,                 /* pc_relative */
665
         0,                      /* bitpos */
666
         complain_overflow_bitfield, /* complain_on_overflow */
667
         ppc_elf_addr16_ha_reloc, /* special_function */
668
         "R_PPC_PLT16_HA",      /* name */
669
         FALSE,                 /* partial_inplace */
670
         0,                      /* src_mask */
671
         0xffff,                /* dst_mask */
672
         FALSE),                /* pcrel_offset */
673
 
674
  /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
675
     small data items.  */
676
  HOWTO (R_PPC_SDAREL16,        /* type */
677
         0,                      /* rightshift */
678
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
679
         16,                    /* bitsize */
680
         FALSE,                 /* pc_relative */
681
         0,                      /* bitpos */
682
         complain_overflow_signed, /* complain_on_overflow */
683
         bfd_elf_generic_reloc, /* special_function */
684
         "R_PPC_SDAREL16",      /* name */
685
         FALSE,                 /* partial_inplace */
686
         0,                      /* src_mask */
687
         0xffff,                /* dst_mask */
688
         FALSE),                /* pcrel_offset */
689
 
690
  /* 16-bit section relative relocation.  */
691
  HOWTO (R_PPC_SECTOFF,         /* type */
692
         0,                      /* rightshift */
693
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
694
         16,                    /* bitsize */
695
         FALSE,                 /* pc_relative */
696
         0,                      /* bitpos */
697
         complain_overflow_bitfield, /* complain_on_overflow */
698
         bfd_elf_generic_reloc, /* special_function */
699
         "R_PPC_SECTOFF",       /* name */
700
         FALSE,                 /* partial_inplace */
701
         0,                      /* src_mask */
702
         0xffff,                /* dst_mask */
703
         FALSE),                /* pcrel_offset */
704
 
705
  /* 16-bit lower half section relative relocation.  */
706
  HOWTO (R_PPC_SECTOFF_LO,        /* type */
707
         0,                      /* rightshift */
708
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
709
         16,                    /* bitsize */
710
         FALSE,                 /* pc_relative */
711
         0,                      /* bitpos */
712
         complain_overflow_dont, /* complain_on_overflow */
713
         bfd_elf_generic_reloc, /* special_function */
714
         "R_PPC_SECTOFF_LO",    /* name */
715
         FALSE,                 /* partial_inplace */
716
         0,                      /* src_mask */
717
         0xffff,                /* dst_mask */
718
         FALSE),                /* pcrel_offset */
719
 
720
  /* 16-bit upper half section relative relocation.  */
721
  HOWTO (R_PPC_SECTOFF_HI,      /* type */
722
         16,                    /* rightshift */
723
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
724
         16,                    /* bitsize */
725
         FALSE,                 /* pc_relative */
726
         0,                      /* bitpos */
727
         complain_overflow_bitfield, /* complain_on_overflow */
728
         bfd_elf_generic_reloc, /* special_function */
729
         "R_PPC_SECTOFF_HI",    /* name */
730
         FALSE,                 /* partial_inplace */
731
         0,                      /* src_mask */
732
         0xffff,                /* dst_mask */
733
         FALSE),                 /* pcrel_offset */
734
 
735
  /* 16-bit upper half adjusted section relative relocation.  */
736
  HOWTO (R_PPC_SECTOFF_HA,      /* type */
737
         16,                    /* rightshift */
738
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
739
         16,                    /* bitsize */
740
         FALSE,                 /* pc_relative */
741
         0,                      /* bitpos */
742
         complain_overflow_bitfield, /* complain_on_overflow */
743
         ppc_elf_addr16_ha_reloc, /* special_function */
744
         "R_PPC_SECTOFF_HA",    /* name */
745
         FALSE,                 /* partial_inplace */
746
         0,                      /* src_mask */
747
         0xffff,                /* dst_mask */
748
         FALSE),                /* pcrel_offset */
749
 
750
  /* Marker reloc for TLS.  */
751
  HOWTO (R_PPC_TLS,
752
         0,                      /* rightshift */
753
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
754
         32,                    /* bitsize */
755
         FALSE,                 /* pc_relative */
756
         0,                      /* bitpos */
757
         complain_overflow_dont, /* complain_on_overflow */
758
         bfd_elf_generic_reloc, /* special_function */
759
         "R_PPC_TLS",           /* name */
760
         FALSE,                 /* partial_inplace */
761
         0,                      /* src_mask */
762
         0,                      /* dst_mask */
763
         FALSE),                /* pcrel_offset */
764
 
765
  /* Computes the load module index of the load module that contains the
766
     definition of its TLS sym.  */
767
  HOWTO (R_PPC_DTPMOD32,
768
         0,                      /* rightshift */
769
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
770
         32,                    /* bitsize */
771
         FALSE,                 /* pc_relative */
772
         0,                      /* bitpos */
773
         complain_overflow_dont, /* complain_on_overflow */
774
         ppc_elf_unhandled_reloc, /* special_function */
775
         "R_PPC_DTPMOD32",      /* name */
776
         FALSE,                 /* partial_inplace */
777
         0,                      /* src_mask */
778
         0xffffffff,            /* dst_mask */
779
         FALSE),                /* pcrel_offset */
780
 
781
  /* Computes a dtv-relative displacement, the difference between the value
782
     of sym+add and the base address of the thread-local storage block that
783
     contains the definition of sym, minus 0x8000.  */
784
  HOWTO (R_PPC_DTPREL32,
785
         0,                      /* rightshift */
786
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
787
         32,                    /* bitsize */
788
         FALSE,                 /* pc_relative */
789
         0,                      /* bitpos */
790
         complain_overflow_dont, /* complain_on_overflow */
791
         ppc_elf_unhandled_reloc, /* special_function */
792
         "R_PPC_DTPREL32",      /* name */
793
         FALSE,                 /* partial_inplace */
794
         0,                      /* src_mask */
795
         0xffffffff,            /* dst_mask */
796
         FALSE),                /* pcrel_offset */
797
 
798
  /* A 16 bit dtprel reloc.  */
799
  HOWTO (R_PPC_DTPREL16,
800
         0,                      /* rightshift */
801
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
802
         16,                    /* bitsize */
803
         FALSE,                 /* pc_relative */
804
         0,                      /* bitpos */
805
         complain_overflow_signed, /* complain_on_overflow */
806
         ppc_elf_unhandled_reloc, /* special_function */
807
         "R_PPC_DTPREL16",      /* name */
808
         FALSE,                 /* partial_inplace */
809
         0,                      /* src_mask */
810
         0xffff,                /* dst_mask */
811
         FALSE),                /* pcrel_offset */
812
 
813
  /* Like DTPREL16, but no overflow.  */
814
  HOWTO (R_PPC_DTPREL16_LO,
815
         0,                      /* rightshift */
816
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
817
         16,                    /* bitsize */
818
         FALSE,                 /* pc_relative */
819
         0,                      /* bitpos */
820
         complain_overflow_dont, /* complain_on_overflow */
821
         ppc_elf_unhandled_reloc, /* special_function */
822
         "R_PPC_DTPREL16_LO",   /* name */
823
         FALSE,                 /* partial_inplace */
824
         0,                      /* src_mask */
825
         0xffff,                /* dst_mask */
826
         FALSE),                /* pcrel_offset */
827
 
828
  /* Like DTPREL16_LO, but next higher group of 16 bits.  */
829
  HOWTO (R_PPC_DTPREL16_HI,
830
         16,                    /* rightshift */
831
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
832
         16,                    /* bitsize */
833
         FALSE,                 /* pc_relative */
834
         0,                      /* bitpos */
835
         complain_overflow_dont, /* complain_on_overflow */
836
         ppc_elf_unhandled_reloc, /* special_function */
837
         "R_PPC_DTPREL16_HI",   /* name */
838
         FALSE,                 /* partial_inplace */
839
         0,                      /* src_mask */
840
         0xffff,                /* dst_mask */
841
         FALSE),                /* pcrel_offset */
842
 
843
  /* Like DTPREL16_HI, but adjust for low 16 bits.  */
844
  HOWTO (R_PPC_DTPREL16_HA,
845
         16,                    /* rightshift */
846
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
847
         16,                    /* bitsize */
848
         FALSE,                 /* pc_relative */
849
         0,                      /* bitpos */
850
         complain_overflow_dont, /* complain_on_overflow */
851
         ppc_elf_unhandled_reloc, /* special_function */
852
         "R_PPC_DTPREL16_HA",   /* name */
853
         FALSE,                 /* partial_inplace */
854
         0,                      /* src_mask */
855
         0xffff,                /* dst_mask */
856
         FALSE),                /* pcrel_offset */
857
 
858
  /* Computes a tp-relative displacement, the difference between the value of
859
     sym+add and the value of the thread pointer (r13).  */
860
  HOWTO (R_PPC_TPREL32,
861
         0,                      /* rightshift */
862
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
863
         32,                    /* bitsize */
864
         FALSE,                 /* pc_relative */
865
         0,                      /* bitpos */
866
         complain_overflow_dont, /* complain_on_overflow */
867
         ppc_elf_unhandled_reloc, /* special_function */
868
         "R_PPC_TPREL32",       /* name */
869
         FALSE,                 /* partial_inplace */
870
         0,                      /* src_mask */
871
         0xffffffff,            /* dst_mask */
872
         FALSE),                /* pcrel_offset */
873
 
874
  /* A 16 bit tprel reloc.  */
875
  HOWTO (R_PPC_TPREL16,
876
         0,                      /* rightshift */
877
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
878
         16,                    /* bitsize */
879
         FALSE,                 /* pc_relative */
880
         0,                      /* bitpos */
881
         complain_overflow_signed, /* complain_on_overflow */
882
         ppc_elf_unhandled_reloc, /* special_function */
883
         "R_PPC_TPREL16",       /* name */
884
         FALSE,                 /* partial_inplace */
885
         0,                      /* src_mask */
886
         0xffff,                /* dst_mask */
887
         FALSE),                /* pcrel_offset */
888
 
889
  /* Like TPREL16, but no overflow.  */
890
  HOWTO (R_PPC_TPREL16_LO,
891
         0,                      /* rightshift */
892
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
893
         16,                    /* bitsize */
894
         FALSE,                 /* pc_relative */
895
         0,                      /* bitpos */
896
         complain_overflow_dont, /* complain_on_overflow */
897
         ppc_elf_unhandled_reloc, /* special_function */
898
         "R_PPC_TPREL16_LO",    /* name */
899
         FALSE,                 /* partial_inplace */
900
         0,                      /* src_mask */
901
         0xffff,                /* dst_mask */
902
         FALSE),                /* pcrel_offset */
903
 
904
  /* Like TPREL16_LO, but next higher group of 16 bits.  */
905
  HOWTO (R_PPC_TPREL16_HI,
906
         16,                    /* rightshift */
907
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
908
         16,                    /* bitsize */
909
         FALSE,                 /* pc_relative */
910
         0,                      /* bitpos */
911
         complain_overflow_dont, /* complain_on_overflow */
912
         ppc_elf_unhandled_reloc, /* special_function */
913
         "R_PPC_TPREL16_HI",    /* name */
914
         FALSE,                 /* partial_inplace */
915
         0,                      /* src_mask */
916
         0xffff,                /* dst_mask */
917
         FALSE),                /* pcrel_offset */
918
 
919
  /* Like TPREL16_HI, but adjust for low 16 bits.  */
920
  HOWTO (R_PPC_TPREL16_HA,
921
         16,                    /* rightshift */
922
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
923
         16,                    /* bitsize */
924
         FALSE,                 /* pc_relative */
925
         0,                      /* bitpos */
926
         complain_overflow_dont, /* complain_on_overflow */
927
         ppc_elf_unhandled_reloc, /* special_function */
928
         "R_PPC_TPREL16_HA",    /* name */
929
         FALSE,                 /* partial_inplace */
930
         0,                      /* src_mask */
931
         0xffff,                /* dst_mask */
932
         FALSE),                /* pcrel_offset */
933
 
934
  /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
935
     with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
936
     to the first entry.  */
937
  HOWTO (R_PPC_GOT_TLSGD16,
938
         0,                      /* rightshift */
939
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
940
         16,                    /* bitsize */
941
         FALSE,                 /* pc_relative */
942
         0,                      /* bitpos */
943
         complain_overflow_signed, /* complain_on_overflow */
944
         ppc_elf_unhandled_reloc, /* special_function */
945
         "R_PPC_GOT_TLSGD16",   /* name */
946
         FALSE,                 /* partial_inplace */
947
         0,                      /* src_mask */
948
         0xffff,                /* dst_mask */
949
         FALSE),                /* pcrel_offset */
950
 
951
  /* Like GOT_TLSGD16, but no overflow.  */
952
  HOWTO (R_PPC_GOT_TLSGD16_LO,
953
         0,                      /* rightshift */
954
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
955
         16,                    /* bitsize */
956
         FALSE,                 /* pc_relative */
957
         0,                      /* bitpos */
958
         complain_overflow_dont, /* complain_on_overflow */
959
         ppc_elf_unhandled_reloc, /* special_function */
960
         "R_PPC_GOT_TLSGD16_LO", /* name */
961
         FALSE,                 /* partial_inplace */
962
         0,                      /* src_mask */
963
         0xffff,                /* dst_mask */
964
         FALSE),                /* pcrel_offset */
965
 
966
  /* Like GOT_TLSGD16_LO, but next higher group of 16 bits.  */
967
  HOWTO (R_PPC_GOT_TLSGD16_HI,
968
         16,                    /* rightshift */
969
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
970
         16,                    /* bitsize */
971
         FALSE,                 /* pc_relative */
972
         0,                      /* bitpos */
973
         complain_overflow_dont, /* complain_on_overflow */
974
         ppc_elf_unhandled_reloc, /* special_function */
975
         "R_PPC_GOT_TLSGD16_HI", /* name */
976
         FALSE,                 /* partial_inplace */
977
         0,                      /* src_mask */
978
         0xffff,                /* dst_mask */
979
         FALSE),                /* pcrel_offset */
980
 
981
  /* Like GOT_TLSGD16_HI, but adjust for low 16 bits.  */
982
  HOWTO (R_PPC_GOT_TLSGD16_HA,
983
         16,                    /* rightshift */
984
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
985
         16,                    /* bitsize */
986
         FALSE,                 /* pc_relative */
987
         0,                      /* bitpos */
988
         complain_overflow_dont, /* complain_on_overflow */
989
         ppc_elf_unhandled_reloc, /* special_function */
990
         "R_PPC_GOT_TLSGD16_HA", /* name */
991
         FALSE,                 /* partial_inplace */
992
         0,                      /* src_mask */
993
         0xffff,                /* dst_mask */
994
         FALSE),                /* pcrel_offset */
995
 
996
  /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
997
     with values (sym+add)@dtpmod and zero, and computes the offset to the
998
     first entry.  */
999
  HOWTO (R_PPC_GOT_TLSLD16,
1000
         0,                      /* rightshift */
1001
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1002
         16,                    /* bitsize */
1003
         FALSE,                 /* pc_relative */
1004
         0,                      /* bitpos */
1005
         complain_overflow_signed, /* complain_on_overflow */
1006
         ppc_elf_unhandled_reloc, /* special_function */
1007
         "R_PPC_GOT_TLSLD16",   /* name */
1008
         FALSE,                 /* partial_inplace */
1009
         0,                      /* src_mask */
1010
         0xffff,                /* dst_mask */
1011
         FALSE),                /* pcrel_offset */
1012
 
1013
  /* Like GOT_TLSLD16, but no overflow.  */
1014
  HOWTO (R_PPC_GOT_TLSLD16_LO,
1015
         0,                      /* rightshift */
1016
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1017
         16,                    /* bitsize */
1018
         FALSE,                 /* pc_relative */
1019
         0,                      /* bitpos */
1020
         complain_overflow_dont, /* complain_on_overflow */
1021
         ppc_elf_unhandled_reloc, /* special_function */
1022
         "R_PPC_GOT_TLSLD16_LO", /* name */
1023
         FALSE,                 /* partial_inplace */
1024
         0,                      /* src_mask */
1025
         0xffff,                /* dst_mask */
1026
         FALSE),                /* pcrel_offset */
1027
 
1028
  /* Like GOT_TLSLD16_LO, but next higher group of 16 bits.  */
1029
  HOWTO (R_PPC_GOT_TLSLD16_HI,
1030
         16,                    /* rightshift */
1031
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1032
         16,                    /* bitsize */
1033
         FALSE,                 /* pc_relative */
1034
         0,                      /* bitpos */
1035
         complain_overflow_dont, /* complain_on_overflow */
1036
         ppc_elf_unhandled_reloc, /* special_function */
1037
         "R_PPC_GOT_TLSLD16_HI", /* name */
1038
         FALSE,                 /* partial_inplace */
1039
         0,                      /* src_mask */
1040
         0xffff,                /* dst_mask */
1041
         FALSE),                /* pcrel_offset */
1042
 
1043
  /* Like GOT_TLSLD16_HI, but adjust for low 16 bits.  */
1044
  HOWTO (R_PPC_GOT_TLSLD16_HA,
1045
         16,                    /* rightshift */
1046
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1047
         16,                    /* bitsize */
1048
         FALSE,                 /* pc_relative */
1049
         0,                      /* bitpos */
1050
         complain_overflow_dont, /* complain_on_overflow */
1051
         ppc_elf_unhandled_reloc, /* special_function */
1052
         "R_PPC_GOT_TLSLD16_HA", /* name */
1053
         FALSE,                 /* partial_inplace */
1054
         0,                      /* src_mask */
1055
         0xffff,                /* dst_mask */
1056
         FALSE),                /* pcrel_offset */
1057
 
1058
  /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1059
     the offset to the entry.  */
1060
  HOWTO (R_PPC_GOT_DTPREL16,
1061
         0,                      /* rightshift */
1062
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1063
         16,                    /* bitsize */
1064
         FALSE,                 /* pc_relative */
1065
         0,                      /* bitpos */
1066
         complain_overflow_signed, /* complain_on_overflow */
1067
         ppc_elf_unhandled_reloc, /* special_function */
1068
         "R_PPC_GOT_DTPREL16",  /* name */
1069
         FALSE,                 /* partial_inplace */
1070
         0,                      /* src_mask */
1071
         0xffff,                /* dst_mask */
1072
         FALSE),                /* pcrel_offset */
1073
 
1074
  /* Like GOT_DTPREL16, but no overflow.  */
1075
  HOWTO (R_PPC_GOT_DTPREL16_LO,
1076
         0,                      /* rightshift */
1077
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1078
         16,                    /* bitsize */
1079
         FALSE,                 /* pc_relative */
1080
         0,                      /* bitpos */
1081
         complain_overflow_dont, /* complain_on_overflow */
1082
         ppc_elf_unhandled_reloc, /* special_function */
1083
         "R_PPC_GOT_DTPREL16_LO", /* name */
1084
         FALSE,                 /* partial_inplace */
1085
         0,                      /* src_mask */
1086
         0xffff,                /* dst_mask */
1087
         FALSE),                /* pcrel_offset */
1088
 
1089
  /* Like GOT_DTPREL16_LO, but next higher group of 16 bits.  */
1090
  HOWTO (R_PPC_GOT_DTPREL16_HI,
1091
         16,                    /* rightshift */
1092
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1093
         16,                    /* bitsize */
1094
         FALSE,                 /* pc_relative */
1095
         0,                      /* bitpos */
1096
         complain_overflow_dont, /* complain_on_overflow */
1097
         ppc_elf_unhandled_reloc, /* special_function */
1098
         "R_PPC_GOT_DTPREL16_HI", /* name */
1099
         FALSE,                 /* partial_inplace */
1100
         0,                      /* src_mask */
1101
         0xffff,                /* dst_mask */
1102
         FALSE),                /* pcrel_offset */
1103
 
1104
  /* Like GOT_DTPREL16_HI, but adjust for low 16 bits.  */
1105
  HOWTO (R_PPC_GOT_DTPREL16_HA,
1106
         16,                    /* rightshift */
1107
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1108
         16,                    /* bitsize */
1109
         FALSE,                 /* pc_relative */
1110
         0,                      /* bitpos */
1111
         complain_overflow_dont, /* complain_on_overflow */
1112
         ppc_elf_unhandled_reloc, /* special_function */
1113
         "R_PPC_GOT_DTPREL16_HA", /* name */
1114
         FALSE,                 /* partial_inplace */
1115
         0,                      /* src_mask */
1116
         0xffff,                /* dst_mask */
1117
         FALSE),                /* pcrel_offset */
1118
 
1119
  /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1120
     offset to the entry.  */
1121
  HOWTO (R_PPC_GOT_TPREL16,
1122
         0,                      /* rightshift */
1123
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1124
         16,                    /* bitsize */
1125
         FALSE,                 /* pc_relative */
1126
         0,                      /* bitpos */
1127
         complain_overflow_signed, /* complain_on_overflow */
1128
         ppc_elf_unhandled_reloc, /* special_function */
1129
         "R_PPC_GOT_TPREL16",   /* name */
1130
         FALSE,                 /* partial_inplace */
1131
         0,                      /* src_mask */
1132
         0xffff,                /* dst_mask */
1133
         FALSE),                /* pcrel_offset */
1134
 
1135
  /* Like GOT_TPREL16, but no overflow.  */
1136
  HOWTO (R_PPC_GOT_TPREL16_LO,
1137
         0,                      /* rightshift */
1138
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1139
         16,                    /* bitsize */
1140
         FALSE,                 /* pc_relative */
1141
         0,                      /* bitpos */
1142
         complain_overflow_dont, /* complain_on_overflow */
1143
         ppc_elf_unhandled_reloc, /* special_function */
1144
         "R_PPC_GOT_TPREL16_LO", /* name */
1145
         FALSE,                 /* partial_inplace */
1146
         0,                      /* src_mask */
1147
         0xffff,                /* dst_mask */
1148
         FALSE),                /* pcrel_offset */
1149
 
1150
  /* Like GOT_TPREL16_LO, but next higher group of 16 bits.  */
1151
  HOWTO (R_PPC_GOT_TPREL16_HI,
1152
         16,                    /* rightshift */
1153
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1154
         16,                    /* bitsize */
1155
         FALSE,                 /* pc_relative */
1156
         0,                      /* bitpos */
1157
         complain_overflow_dont, /* complain_on_overflow */
1158
         ppc_elf_unhandled_reloc, /* special_function */
1159
         "R_PPC_GOT_TPREL16_HI", /* name */
1160
         FALSE,                 /* partial_inplace */
1161
         0,                      /* src_mask */
1162
         0xffff,                /* dst_mask */
1163
         FALSE),                /* pcrel_offset */
1164
 
1165
  /* Like GOT_TPREL16_HI, but adjust for low 16 bits.  */
1166
  HOWTO (R_PPC_GOT_TPREL16_HA,
1167
         16,                    /* rightshift */
1168
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1169
         16,                    /* bitsize */
1170
         FALSE,                 /* pc_relative */
1171
         0,                      /* bitpos */
1172
         complain_overflow_dont, /* complain_on_overflow */
1173
         ppc_elf_unhandled_reloc, /* special_function */
1174
         "R_PPC_GOT_TPREL16_HA", /* name */
1175
         FALSE,                 /* partial_inplace */
1176
         0,                      /* src_mask */
1177
         0xffff,                /* dst_mask */
1178
         FALSE),                /* pcrel_offset */
1179
 
1180
  /* The remaining relocs are from the Embedded ELF ABI, and are not
1181
     in the SVR4 ELF ABI.  */
1182
 
1183
  /* 32 bit value resulting from the addend minus the symbol.  */
1184
  HOWTO (R_PPC_EMB_NADDR32,     /* type */
1185
         0,                      /* rightshift */
1186
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
1187
         32,                    /* bitsize */
1188
         FALSE,                 /* pc_relative */
1189
         0,                      /* bitpos */
1190
         complain_overflow_bitfield, /* complain_on_overflow */
1191
         bfd_elf_generic_reloc, /* special_function */
1192
         "R_PPC_EMB_NADDR32",   /* name */
1193
         FALSE,                 /* partial_inplace */
1194
         0,                      /* src_mask */
1195
         0xffffffff,            /* dst_mask */
1196
         FALSE),                /* pcrel_offset */
1197
 
1198
  /* 16 bit value resulting from the addend minus the symbol.  */
1199
  HOWTO (R_PPC_EMB_NADDR16,     /* type */
1200
         0,                      /* rightshift */
1201
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1202
         16,                    /* bitsize */
1203
         FALSE,                 /* pc_relative */
1204
         0,                      /* bitpos */
1205
         complain_overflow_bitfield, /* complain_on_overflow */
1206
         bfd_elf_generic_reloc, /* special_function */
1207
         "R_PPC_EMB_NADDR16",   /* name */
1208
         FALSE,                 /* partial_inplace */
1209
         0,                      /* src_mask */
1210
         0xffff,                /* dst_mask */
1211
         FALSE),                /* pcrel_offset */
1212
 
1213
  /* 16 bit value resulting from the addend minus the symbol.  */
1214
  HOWTO (R_PPC_EMB_NADDR16_LO,  /* type */
1215
         0,                      /* rightshift */
1216
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1217
         16,                    /* bitsize */
1218
         FALSE,                 /* pc_relative */
1219
         0,                      /* bitpos */
1220
         complain_overflow_dont,/* complain_on_overflow */
1221
         bfd_elf_generic_reloc, /* special_function */
1222
         "R_PPC_EMB_ADDR16_LO", /* name */
1223
         FALSE,                 /* partial_inplace */
1224
         0,                      /* src_mask */
1225
         0xffff,                /* dst_mask */
1226
         FALSE),                /* pcrel_offset */
1227
 
1228
  /* The high order 16 bits of the addend minus the symbol.  */
1229
  HOWTO (R_PPC_EMB_NADDR16_HI,  /* type */
1230
         16,                    /* rightshift */
1231
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1232
         16,                    /* bitsize */
1233
         FALSE,                 /* pc_relative */
1234
         0,                      /* bitpos */
1235
         complain_overflow_dont, /* complain_on_overflow */
1236
         bfd_elf_generic_reloc, /* special_function */
1237
         "R_PPC_EMB_NADDR16_HI", /* name */
1238
         FALSE,                 /* partial_inplace */
1239
         0,                      /* src_mask */
1240
         0xffff,                /* dst_mask */
1241
         FALSE),                /* pcrel_offset */
1242
 
1243
  /* The high order 16 bits of the result of the addend minus the address,
1244
     plus 1 if the contents of the low 16 bits, treated as a signed number,
1245
     is negative.  */
1246
  HOWTO (R_PPC_EMB_NADDR16_HA,  /* type */
1247
         16,                    /* rightshift */
1248
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1249
         16,                    /* bitsize */
1250
         FALSE,                 /* pc_relative */
1251
         0,                      /* bitpos */
1252
         complain_overflow_dont, /* complain_on_overflow */
1253
         ppc_elf_addr16_ha_reloc, /* special_function */
1254
         "R_PPC_EMB_NADDR16_HA", /* name */
1255
         FALSE,                 /* partial_inplace */
1256
         0,                      /* src_mask */
1257
         0xffff,                /* dst_mask */
1258
         FALSE),                /* pcrel_offset */
1259
 
1260
  /* 16 bit value resulting from allocating a 4 byte word to hold an
1261
     address in the .sdata section, and returning the offset from
1262
     _SDA_BASE_ for that relocation.  */
1263
  HOWTO (R_PPC_EMB_SDAI16,      /* type */
1264
         0,                      /* rightshift */
1265
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1266
         16,                    /* bitsize */
1267
         FALSE,                 /* pc_relative */
1268
         0,                      /* bitpos */
1269
         complain_overflow_bitfield, /* complain_on_overflow */
1270
         bfd_elf_generic_reloc, /* special_function */
1271
         "R_PPC_EMB_SDAI16",    /* name */
1272
         FALSE,                 /* partial_inplace */
1273
         0,                      /* src_mask */
1274
         0xffff,                /* dst_mask */
1275
         FALSE),                /* pcrel_offset */
1276
 
1277
  /* 16 bit value resulting from allocating a 4 byte word to hold an
1278
     address in the .sdata2 section, and returning the offset from
1279
     _SDA2_BASE_ for that relocation.  */
1280
  HOWTO (R_PPC_EMB_SDA2I16,     /* type */
1281
         0,                      /* rightshift */
1282
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1283
         16,                    /* bitsize */
1284
         FALSE,                 /* pc_relative */
1285
         0,                      /* bitpos */
1286
         complain_overflow_bitfield, /* complain_on_overflow */
1287
         bfd_elf_generic_reloc, /* special_function */
1288
         "R_PPC_EMB_SDA2I16",   /* name */
1289
         FALSE,                 /* partial_inplace */
1290
         0,                      /* src_mask */
1291
         0xffff,                /* dst_mask */
1292
         FALSE),                /* pcrel_offset */
1293
 
1294
  /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1295
     small data items.   */
1296
  HOWTO (R_PPC_EMB_SDA2REL,     /* type */
1297
         0,                      /* rightshift */
1298
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1299
         16,                    /* bitsize */
1300
         FALSE,                 /* pc_relative */
1301
         0,                      /* bitpos */
1302
         complain_overflow_signed, /* complain_on_overflow */
1303
         bfd_elf_generic_reloc, /* special_function */
1304
         "R_PPC_EMB_SDA2REL",   /* name */
1305
         FALSE,                 /* partial_inplace */
1306
         0,                      /* src_mask */
1307
         0xffff,                /* dst_mask */
1308
         FALSE),                /* pcrel_offset */
1309
 
1310
  /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1311
     signed offset from the appropriate base, and filling in the register
1312
     field with the appropriate register (0, 2, or 13).  */
1313
  HOWTO (R_PPC_EMB_SDA21,       /* type */
1314
         0,                      /* rightshift */
1315
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
1316
         16,                    /* bitsize */
1317
         FALSE,                 /* pc_relative */
1318
         0,                      /* bitpos */
1319
         complain_overflow_signed, /* complain_on_overflow */
1320
         bfd_elf_generic_reloc, /* special_function */
1321
         "R_PPC_EMB_SDA21",     /* name */
1322
         FALSE,                 /* partial_inplace */
1323
         0,                      /* src_mask */
1324
         0xffff,                /* dst_mask */
1325
         FALSE),                /* pcrel_offset */
1326
 
1327
  /* Relocation not handled: R_PPC_EMB_MRKREF */
1328
  /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1329
  /* Relocation not handled: R_PPC_EMB_RELST_LO */
1330
  /* Relocation not handled: R_PPC_EMB_RELST_HI */
1331
  /* Relocation not handled: R_PPC_EMB_RELST_HA */
1332
  /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1333
 
1334
  /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1335
     in the 16 bit signed offset from the appropriate base, and filling in the
1336
     register field with the appropriate register (0, 2, or 13).  */
1337
  HOWTO (R_PPC_EMB_RELSDA,      /* type */
1338
         0,                      /* rightshift */
1339
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1340
         16,                    /* bitsize */
1341
         TRUE,                  /* pc_relative */
1342
         0,                      /* bitpos */
1343
         complain_overflow_signed, /* complain_on_overflow */
1344
         bfd_elf_generic_reloc, /* special_function */
1345
         "R_PPC_EMB_RELSDA",    /* name */
1346
         FALSE,                 /* partial_inplace */
1347
         0,                      /* src_mask */
1348
         0xffff,                /* dst_mask */
1349
         FALSE),                /* pcrel_offset */
1350
 
1351
  /* A 16 bit relative relocation.  */
1352
  HOWTO (R_PPC_REL16,           /* type */
1353
         0,                      /* rightshift */
1354
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1355
         16,                    /* bitsize */
1356
         TRUE,                  /* pc_relative */
1357
         0,                      /* bitpos */
1358
         complain_overflow_bitfield, /* complain_on_overflow */
1359
         bfd_elf_generic_reloc, /* special_function */
1360
         "R_PPC_REL16",         /* name */
1361
         FALSE,                 /* partial_inplace */
1362
         0,                      /* src_mask */
1363
         0xffff,                /* dst_mask */
1364
         TRUE),                 /* pcrel_offset */
1365
 
1366
  /* A 16 bit relative relocation without overflow.  */
1367
  HOWTO (R_PPC_REL16_LO,        /* type */
1368
         0,                      /* rightshift */
1369
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1370
         16,                    /* bitsize */
1371
         TRUE,                  /* pc_relative */
1372
         0,                      /* bitpos */
1373
         complain_overflow_dont,/* complain_on_overflow */
1374
         bfd_elf_generic_reloc, /* special_function */
1375
         "R_PPC_REL16_LO",      /* name */
1376
         FALSE,                 /* partial_inplace */
1377
         0,                      /* src_mask */
1378
         0xffff,                /* dst_mask */
1379
         TRUE),                 /* pcrel_offset */
1380
 
1381
  /* The high order 16 bits of a relative address.  */
1382
  HOWTO (R_PPC_REL16_HI,        /* type */
1383
         16,                    /* rightshift */
1384
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1385
         16,                    /* bitsize */
1386
         TRUE,                  /* pc_relative */
1387
         0,                      /* bitpos */
1388
         complain_overflow_dont, /* complain_on_overflow */
1389
         bfd_elf_generic_reloc, /* special_function */
1390
         "R_PPC_REL16_HI",      /* name */
1391
         FALSE,                 /* partial_inplace */
1392
         0,                      /* src_mask */
1393
         0xffff,                /* dst_mask */
1394
         TRUE),                 /* pcrel_offset */
1395
 
1396
  /* The high order 16 bits of a relative address, plus 1 if the contents of
1397
     the low 16 bits, treated as a signed number, is negative.  */
1398
  HOWTO (R_PPC_REL16_HA,        /* type */
1399
         16,                    /* rightshift */
1400
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1401
         16,                    /* bitsize */
1402
         TRUE,                  /* pc_relative */
1403
         0,                      /* bitpos */
1404
         complain_overflow_dont, /* complain_on_overflow */
1405
         ppc_elf_addr16_ha_reloc, /* special_function */
1406
         "R_PPC_REL16_HA",      /* name */
1407
         FALSE,                 /* partial_inplace */
1408
         0,                      /* src_mask */
1409
         0xffff,                /* dst_mask */
1410
         TRUE),                 /* pcrel_offset */
1411
 
1412
  /* GNU extension to record C++ vtable hierarchy.  */
1413
  HOWTO (R_PPC_GNU_VTINHERIT,   /* type */
1414
         0,                      /* rightshift */
1415
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
1416
         0,                      /* bitsize */
1417
         FALSE,                 /* pc_relative */
1418
         0,                      /* bitpos */
1419
         complain_overflow_dont, /* complain_on_overflow */
1420
         NULL,                  /* special_function */
1421
         "R_PPC_GNU_VTINHERIT", /* name */
1422
         FALSE,                 /* partial_inplace */
1423
         0,                      /* src_mask */
1424
         0,                      /* dst_mask */
1425
         FALSE),                /* pcrel_offset */
1426
 
1427
  /* GNU extension to record C++ vtable member usage.  */
1428
  HOWTO (R_PPC_GNU_VTENTRY,     /* type */
1429
         0,                      /* rightshift */
1430
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
1431
         0,                      /* bitsize */
1432
         FALSE,                 /* pc_relative */
1433
         0,                      /* bitpos */
1434
         complain_overflow_dont, /* complain_on_overflow */
1435
         NULL,                  /* special_function */
1436
         "R_PPC_GNU_VTENTRY",   /* name */
1437
         FALSE,                 /* partial_inplace */
1438
         0,                      /* src_mask */
1439
         0,                      /* dst_mask */
1440
         FALSE),                /* pcrel_offset */
1441
 
1442
  /* Phony reloc to handle AIX style TOC entries.  */
1443
  HOWTO (R_PPC_TOC16,           /* type */
1444
         0,                      /* rightshift */
1445
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
1446
         16,                    /* bitsize */
1447
         FALSE,                 /* pc_relative */
1448
         0,                      /* bitpos */
1449
         complain_overflow_signed, /* complain_on_overflow */
1450
         bfd_elf_generic_reloc, /* special_function */
1451
         "R_PPC_TOC16",         /* name */
1452
         FALSE,                 /* partial_inplace */
1453
         0,                      /* src_mask */
1454
         0xffff,                /* dst_mask */
1455
         FALSE),                /* pcrel_offset */
1456
};
1457
 
1458
/* Initialize the ppc_elf_howto_table, so that linear accesses can be done.  */
1459
 
1460
static void
1461
ppc_elf_howto_init (void)
1462
{
1463
  unsigned int i, type;
1464
 
1465
  for (i = 0;
1466
       i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1467
       i++)
1468
    {
1469
      type = ppc_elf_howto_raw[i].type;
1470
      if (type >= (sizeof (ppc_elf_howto_table)
1471
                   / sizeof (ppc_elf_howto_table[0])))
1472
        abort ();
1473
      ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1474
    }
1475
}
1476
 
1477
static reloc_howto_type *
1478
ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1479
                           bfd_reloc_code_real_type code)
1480
{
1481
  enum elf_ppc_reloc_type r;
1482
 
1483
  /* Initialize howto table if not already done.  */
1484
  if (!ppc_elf_howto_table[R_PPC_ADDR32])
1485
    ppc_elf_howto_init ();
1486
 
1487
  switch (code)
1488
    {
1489
    default:
1490
      return NULL;
1491
 
1492
    case BFD_RELOC_NONE:                r = R_PPC_NONE;                 break;
1493
    case BFD_RELOC_32:                  r = R_PPC_ADDR32;               break;
1494
    case BFD_RELOC_PPC_BA26:            r = R_PPC_ADDR24;               break;
1495
    case BFD_RELOC_16:                  r = R_PPC_ADDR16;               break;
1496
    case BFD_RELOC_LO16:                r = R_PPC_ADDR16_LO;            break;
1497
    case BFD_RELOC_HI16:                r = R_PPC_ADDR16_HI;            break;
1498
    case BFD_RELOC_HI16_S:              r = R_PPC_ADDR16_HA;            break;
1499
    case BFD_RELOC_PPC_BA16:            r = R_PPC_ADDR14;               break;
1500
    case BFD_RELOC_PPC_BA16_BRTAKEN:    r = R_PPC_ADDR14_BRTAKEN;       break;
1501
    case BFD_RELOC_PPC_BA16_BRNTAKEN:   r = R_PPC_ADDR14_BRNTAKEN;      break;
1502
    case BFD_RELOC_PPC_B26:             r = R_PPC_REL24;                break;
1503
    case BFD_RELOC_PPC_B16:             r = R_PPC_REL14;                break;
1504
    case BFD_RELOC_PPC_B16_BRTAKEN:     r = R_PPC_REL14_BRTAKEN;        break;
1505
    case BFD_RELOC_PPC_B16_BRNTAKEN:    r = R_PPC_REL14_BRNTAKEN;       break;
1506
    case BFD_RELOC_16_GOTOFF:           r = R_PPC_GOT16;                break;
1507
    case BFD_RELOC_LO16_GOTOFF:         r = R_PPC_GOT16_LO;             break;
1508
    case BFD_RELOC_HI16_GOTOFF:         r = R_PPC_GOT16_HI;             break;
1509
    case BFD_RELOC_HI16_S_GOTOFF:       r = R_PPC_GOT16_HA;             break;
1510
    case BFD_RELOC_24_PLT_PCREL:        r = R_PPC_PLTREL24;             break;
1511
    case BFD_RELOC_PPC_COPY:            r = R_PPC_COPY;                 break;
1512
    case BFD_RELOC_PPC_GLOB_DAT:        r = R_PPC_GLOB_DAT;             break;
1513
    case BFD_RELOC_PPC_LOCAL24PC:       r = R_PPC_LOCAL24PC;            break;
1514
    case BFD_RELOC_32_PCREL:            r = R_PPC_REL32;                break;
1515
    case BFD_RELOC_32_PLTOFF:           r = R_PPC_PLT32;                break;
1516
    case BFD_RELOC_32_PLT_PCREL:        r = R_PPC_PLTREL32;             break;
1517
    case BFD_RELOC_LO16_PLTOFF:         r = R_PPC_PLT16_LO;             break;
1518
    case BFD_RELOC_HI16_PLTOFF:         r = R_PPC_PLT16_HI;             break;
1519
    case BFD_RELOC_HI16_S_PLTOFF:       r = R_PPC_PLT16_HA;             break;
1520
    case BFD_RELOC_GPREL16:             r = R_PPC_SDAREL16;             break;
1521
    case BFD_RELOC_16_BASEREL:          r = R_PPC_SECTOFF;              break;
1522
    case BFD_RELOC_LO16_BASEREL:        r = R_PPC_SECTOFF_LO;           break;
1523
    case BFD_RELOC_HI16_BASEREL:        r = R_PPC_SECTOFF_HI;           break;
1524
    case BFD_RELOC_HI16_S_BASEREL:      r = R_PPC_SECTOFF_HA;           break;
1525
    case BFD_RELOC_CTOR:                r = R_PPC_ADDR32;               break;
1526
    case BFD_RELOC_PPC_TOC16:           r = R_PPC_TOC16;                break;
1527
    case BFD_RELOC_PPC_TLS:             r = R_PPC_TLS;                  break;
1528
    case BFD_RELOC_PPC_DTPMOD:          r = R_PPC_DTPMOD32;             break;
1529
    case BFD_RELOC_PPC_TPREL16:         r = R_PPC_TPREL16;              break;
1530
    case BFD_RELOC_PPC_TPREL16_LO:      r = R_PPC_TPREL16_LO;           break;
1531
    case BFD_RELOC_PPC_TPREL16_HI:      r = R_PPC_TPREL16_HI;           break;
1532
    case BFD_RELOC_PPC_TPREL16_HA:      r = R_PPC_TPREL16_HA;           break;
1533
    case BFD_RELOC_PPC_TPREL:           r = R_PPC_TPREL32;              break;
1534
    case BFD_RELOC_PPC_DTPREL16:        r = R_PPC_DTPREL16;             break;
1535
    case BFD_RELOC_PPC_DTPREL16_LO:     r = R_PPC_DTPREL16_LO;          break;
1536
    case BFD_RELOC_PPC_DTPREL16_HI:     r = R_PPC_DTPREL16_HI;          break;
1537
    case BFD_RELOC_PPC_DTPREL16_HA:     r = R_PPC_DTPREL16_HA;          break;
1538
    case BFD_RELOC_PPC_DTPREL:          r = R_PPC_DTPREL32;             break;
1539
    case BFD_RELOC_PPC_GOT_TLSGD16:     r = R_PPC_GOT_TLSGD16;          break;
1540
    case BFD_RELOC_PPC_GOT_TLSGD16_LO:  r = R_PPC_GOT_TLSGD16_LO;       break;
1541
    case BFD_RELOC_PPC_GOT_TLSGD16_HI:  r = R_PPC_GOT_TLSGD16_HI;       break;
1542
    case BFD_RELOC_PPC_GOT_TLSGD16_HA:  r = R_PPC_GOT_TLSGD16_HA;       break;
1543
    case BFD_RELOC_PPC_GOT_TLSLD16:     r = R_PPC_GOT_TLSLD16;          break;
1544
    case BFD_RELOC_PPC_GOT_TLSLD16_LO:  r = R_PPC_GOT_TLSLD16_LO;       break;
1545
    case BFD_RELOC_PPC_GOT_TLSLD16_HI:  r = R_PPC_GOT_TLSLD16_HI;       break;
1546
    case BFD_RELOC_PPC_GOT_TLSLD16_HA:  r = R_PPC_GOT_TLSLD16_HA;       break;
1547
    case BFD_RELOC_PPC_GOT_TPREL16:     r = R_PPC_GOT_TPREL16;          break;
1548
    case BFD_RELOC_PPC_GOT_TPREL16_LO:  r = R_PPC_GOT_TPREL16_LO;       break;
1549
    case BFD_RELOC_PPC_GOT_TPREL16_HI:  r = R_PPC_GOT_TPREL16_HI;       break;
1550
    case BFD_RELOC_PPC_GOT_TPREL16_HA:  r = R_PPC_GOT_TPREL16_HA;       break;
1551
    case BFD_RELOC_PPC_GOT_DTPREL16:    r = R_PPC_GOT_DTPREL16;         break;
1552
    case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO;      break;
1553
    case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI;      break;
1554
    case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA;      break;
1555
    case BFD_RELOC_PPC_EMB_NADDR32:     r = R_PPC_EMB_NADDR32;          break;
1556
    case BFD_RELOC_PPC_EMB_NADDR16:     r = R_PPC_EMB_NADDR16;          break;
1557
    case BFD_RELOC_PPC_EMB_NADDR16_LO:  r = R_PPC_EMB_NADDR16_LO;       break;
1558
    case BFD_RELOC_PPC_EMB_NADDR16_HI:  r = R_PPC_EMB_NADDR16_HI;       break;
1559
    case BFD_RELOC_PPC_EMB_NADDR16_HA:  r = R_PPC_EMB_NADDR16_HA;       break;
1560
    case BFD_RELOC_PPC_EMB_SDAI16:      r = R_PPC_EMB_SDAI16;           break;
1561
    case BFD_RELOC_PPC_EMB_SDA2I16:     r = R_PPC_EMB_SDA2I16;          break;
1562
    case BFD_RELOC_PPC_EMB_SDA2REL:     r = R_PPC_EMB_SDA2REL;          break;
1563
    case BFD_RELOC_PPC_EMB_SDA21:       r = R_PPC_EMB_SDA21;            break;
1564
    case BFD_RELOC_PPC_EMB_MRKREF:      r = R_PPC_EMB_MRKREF;           break;
1565
    case BFD_RELOC_PPC_EMB_RELSEC16:    r = R_PPC_EMB_RELSEC16;         break;
1566
    case BFD_RELOC_PPC_EMB_RELST_LO:    r = R_PPC_EMB_RELST_LO;         break;
1567
    case BFD_RELOC_PPC_EMB_RELST_HI:    r = R_PPC_EMB_RELST_HI;         break;
1568
    case BFD_RELOC_PPC_EMB_RELST_HA:    r = R_PPC_EMB_RELST_HA;         break;
1569
    case BFD_RELOC_PPC_EMB_BIT_FLD:     r = R_PPC_EMB_BIT_FLD;          break;
1570
    case BFD_RELOC_PPC_EMB_RELSDA:      r = R_PPC_EMB_RELSDA;           break;
1571
    case BFD_RELOC_16_PCREL:            r = R_PPC_REL16;                break;
1572
    case BFD_RELOC_LO16_PCREL:          r = R_PPC_REL16_LO;             break;
1573
    case BFD_RELOC_HI16_PCREL:          r = R_PPC_REL16_HI;             break;
1574
    case BFD_RELOC_HI16_S_PCREL:        r = R_PPC_REL16_HA;             break;
1575
    case BFD_RELOC_VTABLE_INHERIT:      r = R_PPC_GNU_VTINHERIT;        break;
1576
    case BFD_RELOC_VTABLE_ENTRY:        r = R_PPC_GNU_VTENTRY;          break;
1577
    }
1578
 
1579
  return ppc_elf_howto_table[r];
1580
};
1581
 
1582
static reloc_howto_type *
1583
ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1584
                           const char *r_name)
1585
{
1586
  unsigned int i;
1587
 
1588
  for (i = 0;
1589
       i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1590
       i++)
1591
    if (ppc_elf_howto_raw[i].name != NULL
1592
        && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1593
      return &ppc_elf_howto_raw[i];
1594
 
1595
  return NULL;
1596
}
1597
 
1598
/* Set the howto pointer for a PowerPC ELF reloc.  */
1599
 
1600
static void
1601
ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1602
                       arelent *cache_ptr,
1603
                       Elf_Internal_Rela *dst)
1604
{
1605
  /* Initialize howto table if not already done.  */
1606
  if (!ppc_elf_howto_table[R_PPC_ADDR32])
1607
    ppc_elf_howto_init ();
1608
 
1609
  BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1610
  cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1611
 
1612
  /* Just because the above assert didn't trigger doesn't mean that
1613
     ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation.  */
1614
  if (!cache_ptr->howto)
1615
    {
1616
      (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1617
                             abfd, ELF32_R_TYPE (dst->r_info));
1618
      bfd_set_error (bfd_error_bad_value);
1619
 
1620
      cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1621
    }
1622
}
1623
 
1624
/* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs.  */
1625
 
1626
static bfd_reloc_status_type
1627
ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1628
                         arelent *reloc_entry,
1629
                         asymbol *symbol,
1630
                         void *data ATTRIBUTE_UNUSED,
1631
                         asection *input_section,
1632
                         bfd *output_bfd,
1633
                         char **error_message ATTRIBUTE_UNUSED)
1634
{
1635
  bfd_vma relocation;
1636
 
1637
  if (output_bfd != NULL)
1638
    {
1639
      reloc_entry->address += input_section->output_offset;
1640
      return bfd_reloc_ok;
1641
    }
1642
 
1643
  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1644
    return bfd_reloc_outofrange;
1645
 
1646
  if (bfd_is_com_section (symbol->section))
1647
    relocation = 0;
1648
  else
1649
    relocation = symbol->value;
1650
 
1651
  relocation += symbol->section->output_section->vma;
1652
  relocation += symbol->section->output_offset;
1653
  relocation += reloc_entry->addend;
1654
  if (reloc_entry->howto->pc_relative)
1655
    relocation -= reloc_entry->address;
1656
 
1657
  reloc_entry->addend += (relocation & 0x8000) << 1;
1658
 
1659
  return bfd_reloc_continue;
1660
}
1661
 
1662
static bfd_reloc_status_type
1663
ppc_elf_unhandled_reloc (bfd *abfd,
1664
                         arelent *reloc_entry,
1665
                         asymbol *symbol,
1666
                         void *data,
1667
                         asection *input_section,
1668
                         bfd *output_bfd,
1669
                         char **error_message)
1670
{
1671
  /* If this is a relocatable link (output_bfd test tells us), just
1672
     call the generic function.  Any adjustment will be done at final
1673
     link time.  */
1674
  if (output_bfd != NULL)
1675
    return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1676
                                  input_section, output_bfd, error_message);
1677
 
1678
  if (error_message != NULL)
1679
    {
1680
      static char buf[60];
1681
      sprintf (buf, _("generic linker can't handle %s"),
1682
               reloc_entry->howto->name);
1683
      *error_message = buf;
1684
    }
1685
  return bfd_reloc_dangerous;
1686
}
1687
 
1688
/* Sections created by the linker.  */
1689
 
1690
typedef struct elf_linker_section
1691
{
1692
  /* Pointer to the bfd section.  */
1693
  asection *section;
1694
  /* Section name.  */
1695
  const char *name;
1696
  /* Associated bss section name.  */
1697
  const char *bss_name;
1698
  /* Associated symbol name.  */
1699
  const char *sym_name;
1700
  /* Associated symbol.  */
1701
  struct elf_link_hash_entry *sym;
1702
} elf_linker_section_t;
1703
 
1704
/* Linked list of allocated pointer entries.  This hangs off of the
1705
   symbol lists, and provides allows us to return different pointers,
1706
   based on different addend's.  */
1707
 
1708
typedef struct elf_linker_section_pointers
1709
{
1710
  /* next allocated pointer for this symbol */
1711
  struct elf_linker_section_pointers *next;
1712
  /* offset of pointer from beginning of section */
1713
  bfd_vma offset;
1714
  /* addend used */
1715
  bfd_vma addend;
1716
  /* which linker section this is */
1717
  elf_linker_section_t *lsect;
1718
} elf_linker_section_pointers_t;
1719
 
1720
struct ppc_elf_obj_tdata
1721
{
1722
  struct elf_obj_tdata elf;
1723
 
1724
  /* A mapping from local symbols to offsets into the various linker
1725
     sections added.  This is index by the symbol index.  */
1726
  elf_linker_section_pointers_t **linker_section_pointers;
1727
 
1728
  /* Flags used to auto-detect plt type.  */
1729
  unsigned int makes_plt_call : 1;
1730
  unsigned int has_rel16 : 1;
1731
};
1732
 
1733
#define ppc_elf_tdata(bfd) \
1734
  ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1735
 
1736
#define elf_local_ptr_offsets(bfd) \
1737
  (ppc_elf_tdata (bfd)->linker_section_pointers)
1738
 
1739
#define is_ppc_elf(bfd) \
1740
  (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1741
   && elf_object_id (bfd) == PPC32_ELF_TDATA)
1742
 
1743
/* Override the generic function because we store some extras.  */
1744
 
1745
static bfd_boolean
1746
ppc_elf_mkobject (bfd *abfd)
1747
{
1748
  return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1749
                                  PPC32_ELF_TDATA);
1750
}
1751
 
1752
/* Fix bad default arch selected for a 32 bit input bfd when the
1753
   default is 64 bit.  */
1754
 
1755
static bfd_boolean
1756
ppc_elf_object_p (bfd *abfd)
1757
{
1758
  if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1759
    {
1760
      Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1761
 
1762
      if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1763
        {
1764
          /* Relies on arch after 64 bit default being 32 bit default.  */
1765
          abfd->arch_info = abfd->arch_info->next;
1766
          BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1767
        }
1768
    }
1769
  return TRUE;
1770
}
1771
 
1772
/* Function to set whether a module needs the -mrelocatable bit set.  */
1773
 
1774
static bfd_boolean
1775
ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1776
{
1777
  BFD_ASSERT (!elf_flags_init (abfd)
1778
              || elf_elfheader (abfd)->e_flags == flags);
1779
 
1780
  elf_elfheader (abfd)->e_flags = flags;
1781
  elf_flags_init (abfd) = TRUE;
1782
  return TRUE;
1783
}
1784
 
1785
/* Support for core dump NOTE sections.  */
1786
 
1787
static bfd_boolean
1788
ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1789
{
1790
  int offset;
1791
  unsigned int size;
1792
 
1793
  switch (note->descsz)
1794
    {
1795
    default:
1796
      return FALSE;
1797
 
1798
    case 268:           /* Linux/PPC.  */
1799
      /* pr_cursig */
1800
      elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1801
 
1802
      /* pr_pid */
1803
      elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1804
 
1805
      /* pr_reg */
1806
      offset = 72;
1807
      size = 192;
1808
 
1809
      break;
1810
    }
1811
 
1812
  /* Make a ".reg/999" section.  */
1813
  return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1814
                                          size, note->descpos + offset);
1815
}
1816
 
1817
static bfd_boolean
1818
ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1819
{
1820
  switch (note->descsz)
1821
    {
1822
    default:
1823
      return FALSE;
1824
 
1825
    case 128:           /* Linux/PPC elf_prpsinfo.  */
1826
      elf_tdata (abfd)->core_program
1827
        = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1828
      elf_tdata (abfd)->core_command
1829
        = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1830
    }
1831
 
1832
  /* Note that for some reason, a spurious space is tacked
1833
     onto the end of the args in some (at least one anyway)
1834
     implementations, so strip it off if it exists.  */
1835
 
1836
  {
1837
    char *command = elf_tdata (abfd)->core_command;
1838
    int n = strlen (command);
1839
 
1840
    if (0 < n && command[n - 1] == ' ')
1841
      command[n - 1] = '\0';
1842
  }
1843
 
1844
  return TRUE;
1845
}
1846
 
1847
static char *
1848
ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1849
{
1850
  switch (note_type)
1851
    {
1852
    default:
1853
      return NULL;
1854
 
1855
    case NT_PRPSINFO:
1856
      {
1857
        char data[128];
1858
        va_list ap;
1859
 
1860
        va_start (ap, note_type);
1861
        memset (data, 0, 32);
1862
        strncpy (data + 32, va_arg (ap, const char *), 16);
1863
        strncpy (data + 48, va_arg (ap, const char *), 80);
1864
        va_end (ap);
1865
        return elfcore_write_note (abfd, buf, bufsiz,
1866
                                   "CORE", note_type, data, sizeof (data));
1867
      }
1868
 
1869
    case NT_PRSTATUS:
1870
      {
1871
        char data[268];
1872
        va_list ap;
1873
        long pid;
1874
        int cursig;
1875
        const void *greg;
1876
 
1877
        va_start (ap, note_type);
1878
        memset (data, 0, 72);
1879
        pid = va_arg (ap, long);
1880
        bfd_put_32 (abfd, pid, data + 24);
1881
        cursig = va_arg (ap, int);
1882
        bfd_put_16 (abfd, cursig, data + 12);
1883
        greg = va_arg (ap, const void *);
1884
        memcpy (data + 72, greg, 192);
1885
        memset (data + 264, 0, 4);
1886
        va_end (ap);
1887
        return elfcore_write_note (abfd, buf, bufsiz,
1888
                                   "CORE", note_type, data, sizeof (data));
1889
      }
1890
    }
1891
}
1892
 
1893
/* Return address for Ith PLT stub in section PLT, for relocation REL
1894
   or (bfd_vma) -1 if it should not be included.  */
1895
 
1896
static bfd_vma
1897
ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1898
                     const asection *plt ATTRIBUTE_UNUSED,
1899
                     const arelent *rel)
1900
{
1901
  return rel->address;
1902
}
1903
 
1904
/* Handle a PowerPC specific section when reading an object file.  This
1905
   is called when bfd_section_from_shdr finds a section with an unknown
1906
   type.  */
1907
 
1908
static bfd_boolean
1909
ppc_elf_section_from_shdr (bfd *abfd,
1910
                           Elf_Internal_Shdr *hdr,
1911
                           const char *name,
1912
                           int shindex)
1913
{
1914
  asection *newsect;
1915
  flagword flags;
1916
 
1917
  if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1918
    return FALSE;
1919
 
1920
  newsect = hdr->bfd_section;
1921
  flags = bfd_get_section_flags (abfd, newsect);
1922
  if (hdr->sh_flags & SHF_EXCLUDE)
1923
    flags |= SEC_EXCLUDE;
1924
 
1925
  if (hdr->sh_type == SHT_ORDERED)
1926
    flags |= SEC_SORT_ENTRIES;
1927
 
1928
  bfd_set_section_flags (abfd, newsect, flags);
1929
  return TRUE;
1930
}
1931
 
1932
/* Set up any other section flags and such that may be necessary.  */
1933
 
1934
static bfd_boolean
1935
ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1936
                       Elf_Internal_Shdr *shdr,
1937
                       asection *asect)
1938
{
1939
  if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1940
    shdr->sh_flags |= SHF_EXCLUDE;
1941
 
1942
  if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1943
    shdr->sh_type = SHT_ORDERED;
1944
 
1945
  return TRUE;
1946
}
1947
 
1948
/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1949
   need to bump up the number of section headers.  */
1950
 
1951
static int
1952
ppc_elf_additional_program_headers (bfd *abfd,
1953
                                    struct bfd_link_info *info ATTRIBUTE_UNUSED)
1954
{
1955
  asection *s;
1956
  int ret = 0;
1957
 
1958
  s = bfd_get_section_by_name (abfd, ".sbss2");
1959
  if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1960
    ++ret;
1961
 
1962
  s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1963
  if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1964
    ++ret;
1965
 
1966
  return ret;
1967
}
1968
 
1969
/* Add extra PPC sections -- Note, for now, make .sbss2 and
1970
   .PPC.EMB.sbss0 a normal section, and not a bss section so
1971
   that the linker doesn't crater when trying to make more than
1972
   2 sections.  */
1973
 
1974
static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1975
{
1976
  { STRING_COMMA_LEN (".plt"),             0, SHT_NOBITS,   SHF_ALLOC + SHF_EXECINSTR },
1977
  { STRING_COMMA_LEN (".sbss"),           -2, SHT_NOBITS,   SHF_ALLOC + SHF_WRITE },
1978
  { STRING_COMMA_LEN (".sbss2"),          -2, SHT_PROGBITS, SHF_ALLOC },
1979
  { STRING_COMMA_LEN (".sdata"),          -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1980
  { STRING_COMMA_LEN (".sdata2"),         -2, SHT_PROGBITS, SHF_ALLOC },
1981
  { STRING_COMMA_LEN (".tags"),            0, SHT_ORDERED,  SHF_ALLOC },
1982
  { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE,     0 },
1983
  { STRING_COMMA_LEN (".PPC.EMB.sbss0"),   0, SHT_PROGBITS, SHF_ALLOC },
1984
  { STRING_COMMA_LEN (".PPC.EMB.sdata0"),  0, SHT_PROGBITS, SHF_ALLOC },
1985
  { NULL,                              0,  0, 0,            0 }
1986
};
1987
 
1988
/* This is what we want for new plt/got.  */
1989
static struct bfd_elf_special_section ppc_alt_plt =
1990
  { STRING_COMMA_LEN (".plt"),             0, SHT_PROGBITS, SHF_ALLOC };
1991
 
1992
static const struct bfd_elf_special_section *
1993
ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1994
{
1995
  const struct bfd_elf_special_section *ssect;
1996
 
1997
  /* See if this is one of the special sections.  */
1998
  if (sec->name == NULL)
1999
    return NULL;
2000
 
2001
  ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2002
                                        sec->use_rela_p);
2003
  if (ssect != NULL)
2004
    {
2005
      if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2006
        ssect = &ppc_alt_plt;
2007
      return ssect;
2008
    }
2009
 
2010
  return _bfd_elf_get_sec_type_attr (abfd, sec);
2011
}
2012
 
2013
/* Very simple linked list structure for recording apuinfo values.  */
2014
typedef struct apuinfo_list
2015
{
2016
  struct apuinfo_list *next;
2017
  unsigned long value;
2018
}
2019
apuinfo_list;
2020
 
2021
static apuinfo_list *head;
2022
 
2023
 
2024
static void
2025
apuinfo_list_init (void)
2026
{
2027
  head = NULL;
2028
}
2029
 
2030
static void
2031
apuinfo_list_add (unsigned long value)
2032
{
2033
  apuinfo_list *entry = head;
2034
 
2035
  while (entry != NULL)
2036
    {
2037
      if (entry->value == value)
2038
        return;
2039
      entry = entry->next;
2040
    }
2041
 
2042
  entry = bfd_malloc (sizeof (* entry));
2043
  if (entry == NULL)
2044
    return;
2045
 
2046
  entry->value = value;
2047
  entry->next  = head;
2048
  head = entry;
2049
}
2050
 
2051
static unsigned
2052
apuinfo_list_length (void)
2053
{
2054
  apuinfo_list *entry;
2055
  unsigned long count;
2056
 
2057
  for (entry = head, count = 0;
2058
       entry;
2059
       entry = entry->next)
2060
    ++ count;
2061
 
2062
  return count;
2063
}
2064
 
2065
static inline unsigned long
2066
apuinfo_list_element (unsigned long number)
2067
{
2068
  apuinfo_list * entry;
2069
 
2070
  for (entry = head;
2071
       entry && number --;
2072
       entry = entry->next)
2073
    ;
2074
 
2075
  return entry ? entry->value : 0;
2076
}
2077
 
2078
static void
2079
apuinfo_list_finish (void)
2080
{
2081
  apuinfo_list *entry;
2082
 
2083
  for (entry = head; entry;)
2084
    {
2085
      apuinfo_list *next = entry->next;
2086
      free (entry);
2087
      entry = next;
2088
    }
2089
 
2090
  head = NULL;
2091
}
2092
 
2093
#define APUINFO_SECTION_NAME    ".PPC.EMB.apuinfo"
2094
#define APUINFO_LABEL           "APUinfo"
2095
 
2096
/* Scan the input BFDs and create a linked list of
2097
   the APUinfo values that will need to be emitted.  */
2098
 
2099
static void
2100
ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2101
{
2102
  bfd *ibfd;
2103
  asection *asec;
2104
  char *buffer;
2105
  unsigned num_input_sections;
2106
  bfd_size_type output_section_size;
2107
  unsigned i;
2108
  unsigned num_entries;
2109
  unsigned long offset;
2110
  unsigned long length;
2111
  const char *error_message = NULL;
2112
 
2113
  if (link_info == NULL)
2114
    return;
2115
 
2116
  /* Scan the input bfds, looking for apuinfo sections.  */
2117
  num_input_sections = 0;
2118
  output_section_size = 0;
2119
 
2120
  for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2121
    {
2122
      asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2123
      if (asec)
2124
        {
2125
          ++ num_input_sections;
2126
          output_section_size += asec->size;
2127
        }
2128
    }
2129
 
2130
  /* We need at least one input sections
2131
     in order to make merging worthwhile.  */
2132
  if (num_input_sections < 1)
2133
    return;
2134
 
2135
  /* Just make sure that the output section exists as well.  */
2136
  asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137
  if (asec == NULL)
2138
    return;
2139
 
2140
  /* Allocate a buffer for the contents of the input sections.  */
2141
  buffer = bfd_malloc (output_section_size);
2142
  if (buffer == NULL)
2143
    return;
2144
 
2145
  offset = 0;
2146
  apuinfo_list_init ();
2147
 
2148
  /* Read in the input sections contents.  */
2149
  for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2150
    {
2151
      unsigned long datum;
2152
      char *ptr;
2153
 
2154
      asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2155
      if (asec == NULL)
2156
        continue;
2157
 
2158
      length = asec->size;
2159
      if (length < 24)
2160
        {
2161
          error_message = _("corrupt or empty %s section in %B");
2162
          goto fail;
2163
        }
2164
 
2165
      if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2166
          || (bfd_bread (buffer + offset, length, ibfd) != length))
2167
        {
2168
          error_message = _("unable to read in %s section from %B");
2169
          goto fail;
2170
        }
2171
 
2172
      /* Process the contents of the section.  */
2173
      ptr = buffer + offset;
2174
      error_message = _("corrupt %s section in %B");
2175
 
2176
      /* Verify the contents of the header.  Note - we have to
2177
         extract the values this way in order to allow for a
2178
         host whose endian-ness is different from the target.  */
2179
      datum = bfd_get_32 (ibfd, ptr);
2180
      if (datum != sizeof APUINFO_LABEL)
2181
        goto fail;
2182
 
2183
      datum = bfd_get_32 (ibfd, ptr + 8);
2184
      if (datum != 0x2)
2185
        goto fail;
2186
 
2187
      if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2188
        goto fail;
2189
 
2190
      /* Get the number of bytes used for apuinfo entries.  */
2191
      datum = bfd_get_32 (ibfd, ptr + 4);
2192
      if (datum + 20 != length)
2193
        goto fail;
2194
 
2195
      /* Make sure that we do not run off the end of the section.  */
2196
      if (offset + length > output_section_size)
2197
        goto fail;
2198
 
2199
      /* Scan the apuinfo section, building a list of apuinfo numbers.  */
2200
      for (i = 0; i < datum; i += 4)
2201
        apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2202
 
2203
      /* Update the offset.  */
2204
      offset += length;
2205
    }
2206
 
2207
  error_message = NULL;
2208
 
2209
  /* Compute the size of the output section.  */
2210
  num_entries = apuinfo_list_length ();
2211
  output_section_size = 20 + num_entries * 4;
2212
 
2213
  asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2214
 
2215
  if (! bfd_set_section_size (abfd, asec, output_section_size))
2216
    ibfd = abfd,
2217
      error_message = _("warning: unable to set size of %s section in %B");
2218
 
2219
 fail:
2220
  free (buffer);
2221
 
2222
  if (error_message)
2223
    (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2224
}
2225
 
2226
/* Prevent the output section from accumulating the input sections'
2227
   contents.  We have already stored this in our linked list structure.  */
2228
 
2229
static bfd_boolean
2230
ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2231
                       struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2232
                       asection *asec,
2233
                       bfd_byte *contents ATTRIBUTE_UNUSED)
2234
{
2235
  return (apuinfo_list_length ()
2236
          && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2237
}
2238
 
2239
/* Finally we can generate the output section.  */
2240
 
2241
static void
2242
ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2243
{
2244
  bfd_byte *buffer;
2245
  asection *asec;
2246
  unsigned i;
2247
  unsigned num_entries;
2248
  bfd_size_type length;
2249
 
2250
  asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2251
  if (asec == NULL)
2252
    return;
2253
 
2254
  if (apuinfo_list_length () == 0)
2255
    return;
2256
 
2257
  length = asec->size;
2258
  if (length < 20)
2259
    return;
2260
 
2261
  buffer = bfd_malloc (length);
2262
  if (buffer == NULL)
2263
    {
2264
      (*_bfd_error_handler)
2265
        (_("failed to allocate space for new APUinfo section."));
2266
      return;
2267
    }
2268
 
2269
  /* Create the apuinfo header.  */
2270
  num_entries = apuinfo_list_length ();
2271
  bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2272
  bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2273
  bfd_put_32 (abfd, 0x2, buffer + 8);
2274
  strcpy ((char *) buffer + 12, APUINFO_LABEL);
2275
 
2276
  length = 20;
2277
  for (i = 0; i < num_entries; i++)
2278
    {
2279
      bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2280
      length += 4;
2281
    }
2282
 
2283
  if (length != asec->size)
2284
    (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2285
 
2286
  if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2287
    (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2288
 
2289
  free (buffer);
2290
 
2291
  apuinfo_list_finish ();
2292
}
2293
 
2294
/* The following functions are specific to the ELF linker, while
2295
   functions above are used generally.  They appear in this file more
2296
   or less in the order in which they are called.  eg.
2297
   ppc_elf_check_relocs is called early in the link process,
2298
   ppc_elf_finish_dynamic_sections is one of the last functions
2299
   called.  */
2300
 
2301
/* The PPC linker needs to keep track of the number of relocs that it
2302
   decides to copy as dynamic relocs in check_relocs for each symbol.
2303
   This is so that it can later discard them if they are found to be
2304
   unnecessary.  We store the information in a field extending the
2305
   regular ELF linker hash table.  */
2306
 
2307
struct ppc_elf_dyn_relocs
2308
{
2309
  struct ppc_elf_dyn_relocs *next;
2310
 
2311
  /* The input section of the reloc.  */
2312
  asection *sec;
2313
 
2314
  /* Total number of relocs copied for the input section.  */
2315
  bfd_size_type count;
2316
 
2317
  /* Number of pc-relative relocs copied for the input section.  */
2318
  bfd_size_type pc_count;
2319
};
2320
 
2321
/* Track PLT entries needed for a given symbol.  We might need more
2322
   than one glink entry per symbol.  */
2323
struct plt_entry
2324
{
2325
  struct plt_entry *next;
2326
 
2327
  /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2328
     This field stores the offset into .got2 used to initialise the
2329
     GOT pointer reg.  It will always be at least 32768 (and for
2330
     current gcc this is the only offset used).  */
2331
  bfd_vma addend;
2332
 
2333
  /* The .got2 section.  */
2334
  asection *sec;
2335
 
2336
  /* PLT refcount or offset.  */
2337
  union
2338
    {
2339
      bfd_signed_vma refcount;
2340
      bfd_vma offset;
2341
    } plt;
2342
 
2343
  /* .glink stub offset.  */
2344
  bfd_vma glink_offset;
2345
};
2346
 
2347
/* Of those relocs that might be copied as dynamic relocs, this macro
2348
   selects those that must be copied when linking a shared library,
2349
   even when the symbol is local.  */
2350
 
2351
#define MUST_BE_DYN_RELOC(RTYPE)                \
2352
  ((RTYPE) != R_PPC_REL24                       \
2353
   && (RTYPE) != R_PPC_REL14                    \
2354
   && (RTYPE) != R_PPC_REL14_BRTAKEN            \
2355
   && (RTYPE) != R_PPC_REL14_BRNTAKEN           \
2356
   && (RTYPE) != R_PPC_REL32)
2357
 
2358
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2359
   copying dynamic variables from a shared lib into an app's dynbss
2360
   section, and instead use a dynamic relocation to point into the
2361
   shared lib.  */
2362
#define ELIMINATE_COPY_RELOCS 1
2363
 
2364
/* PPC ELF linker hash entry.  */
2365
 
2366
struct ppc_elf_link_hash_entry
2367
{
2368
  struct elf_link_hash_entry elf;
2369
 
2370
  /* If this symbol is used in the linker created sections, the processor
2371
     specific backend uses this field to map the field into the offset
2372
     from the beginning of the section.  */
2373
  elf_linker_section_pointers_t *linker_section_pointer;
2374
 
2375
  /* Track dynamic relocs copied for this symbol.  */
2376
  struct ppc_elf_dyn_relocs *dyn_relocs;
2377
 
2378
  /* Contexts in which symbol is used in the GOT (or TOC).
2379
     TLS_GD .. TLS_TLS bits are or'd into the mask as the
2380
     corresponding relocs are encountered during check_relocs.
2381
     tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2382
     indicate the corresponding GOT entry type is not needed.  */
2383
#define TLS_GD           1      /* GD reloc. */
2384
#define TLS_LD           2      /* LD reloc. */
2385
#define TLS_TPREL        4      /* TPREL reloc, => IE. */
2386
#define TLS_DTPREL       8      /* DTPREL reloc, => LD. */
2387
#define TLS_TLS         16      /* Any TLS reloc.  */
2388
#define TLS_TPRELGD     32      /* TPREL reloc resulting from GD->IE. */
2389
  char tls_mask;
2390
 
2391
  /* Nonzero if we have seen a small data relocation referring to this
2392
     symbol.  */
2393
  unsigned char has_sda_refs;
2394
};
2395
 
2396
#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2397
 
2398
/* PPC ELF linker hash table.  */
2399
 
2400
struct ppc_elf_link_hash_table
2401
{
2402
  struct elf_link_hash_table elf;
2403
 
2404
  /* Short-cuts to get to dynamic linker sections.  */
2405
  asection *got;
2406
  asection *relgot;
2407
  asection *glink;
2408
  asection *plt;
2409
  asection *relplt;
2410
  asection *dynbss;
2411
  asection *relbss;
2412
  asection *dynsbss;
2413
  asection *relsbss;
2414
  elf_linker_section_t sdata[2];
2415
  asection *sbss;
2416
 
2417
  /* The (unloaded but important) .rela.plt.unloaded on VxWorks.  */
2418
  asection *srelplt2;
2419
 
2420
  /* The .got.plt section (VxWorks only)*/
2421
  asection *sgotplt;
2422
 
2423
  /* Shortcut to .__tls_get_addr.  */
2424
  struct elf_link_hash_entry *tls_get_addr;
2425
 
2426
  /* The bfd that forced an old-style PLT.  */
2427
  bfd *old_bfd;
2428
 
2429
  /* TLS local dynamic got entry handling.  */
2430
  union {
2431
    bfd_signed_vma refcount;
2432
    bfd_vma offset;
2433
  } tlsld_got;
2434
 
2435
  /* Offset of PltResolve function in glink.  */
2436
  bfd_vma glink_pltresolve;
2437
 
2438
  /* Size of reserved GOT entries.  */
2439
  unsigned int got_header_size;
2440
  /* Non-zero if allocating the header left a gap.  */
2441
  unsigned int got_gap;
2442
 
2443
  /* The type of PLT we have chosen to use.  */
2444
  enum ppc_elf_plt_type plt_type;
2445
 
2446
  /* Set if we should emit symbols for stubs.  */
2447
  unsigned int emit_stub_syms:1;
2448
 
2449
  /* True if the target system is VxWorks.  */
2450
  unsigned int is_vxworks:1;
2451
 
2452
  /* The size of PLT entries.  */
2453
  int plt_entry_size;
2454
  /* The distance between adjacent PLT slots.  */
2455
  int plt_slot_size;
2456
  /* The size of the first PLT entry.  */
2457
  int plt_initial_entry_size;
2458
 
2459
  /* Small local sym to section mapping cache.  */
2460
  struct sym_sec_cache sym_sec;
2461
};
2462
 
2463
/* Get the PPC ELF linker hash table from a link_info structure.  */
2464
 
2465
#define ppc_elf_hash_table(p) \
2466
  ((struct ppc_elf_link_hash_table *) (p)->hash)
2467
 
2468
/* Create an entry in a PPC ELF linker hash table.  */
2469
 
2470
static struct bfd_hash_entry *
2471
ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2472
                           struct bfd_hash_table *table,
2473
                           const char *string)
2474
{
2475
  /* Allocate the structure if it has not already been allocated by a
2476
     subclass.  */
2477
  if (entry == NULL)
2478
    {
2479
      entry = bfd_hash_allocate (table,
2480
                                 sizeof (struct ppc_elf_link_hash_entry));
2481
      if (entry == NULL)
2482
        return entry;
2483
    }
2484
 
2485
  /* Call the allocation method of the superclass.  */
2486
  entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2487
  if (entry != NULL)
2488
    {
2489
      ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2490
      ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2491
      ppc_elf_hash_entry (entry)->tls_mask = 0;
2492
    }
2493
 
2494
  return entry;
2495
}
2496
 
2497
/* Create a PPC ELF linker hash table.  */
2498
 
2499
static struct bfd_link_hash_table *
2500
ppc_elf_link_hash_table_create (bfd *abfd)
2501
{
2502
  struct ppc_elf_link_hash_table *ret;
2503
 
2504
  ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2505
  if (ret == NULL)
2506
    return NULL;
2507
 
2508
  if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2509
                                      ppc_elf_link_hash_newfunc,
2510
                                      sizeof (struct ppc_elf_link_hash_entry)))
2511
    {
2512
      free (ret);
2513
      return NULL;
2514
    }
2515
 
2516
  ret->elf.init_plt_refcount.refcount = 0;
2517
  ret->elf.init_plt_refcount.glist = NULL;
2518
  ret->elf.init_plt_offset.offset = 0;
2519
  ret->elf.init_plt_offset.glist = NULL;
2520
 
2521
  ret->sdata[0].name = ".sdata";
2522
  ret->sdata[0].sym_name = "_SDA_BASE_";
2523
  ret->sdata[0].bss_name = ".sbss";
2524
 
2525
  ret->sdata[1].name = ".sdata2";
2526
  ret->sdata[1].sym_name = "_SDA2_BASE_";
2527
  ret->sdata[1].bss_name = ".sbss2";
2528
 
2529
  ret->plt_entry_size = 12;
2530
  ret->plt_slot_size = 8;
2531
  ret->plt_initial_entry_size = 72;
2532
 
2533
  return &ret->elf.root;
2534
}
2535
 
2536
/* Create .got and the related sections.  */
2537
 
2538
static bfd_boolean
2539
ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2540
{
2541
  struct ppc_elf_link_hash_table *htab;
2542
  asection *s;
2543
  flagword flags;
2544
 
2545
  if (!_bfd_elf_create_got_section (abfd, info))
2546
    return FALSE;
2547
 
2548
  htab = ppc_elf_hash_table (info);
2549
  htab->got = s = bfd_get_section_by_name (abfd, ".got");
2550
  if (s == NULL)
2551
    abort ();
2552
 
2553
  if (htab->is_vxworks)
2554
    {
2555
      htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2556
      if (!htab->sgotplt)
2557
        abort ();
2558
    }
2559
  else
2560
    {
2561
      /* The powerpc .got has a blrl instruction in it.  Mark it
2562
         executable.  */
2563
      flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2564
               | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2565
      if (!bfd_set_section_flags (abfd, s, flags))
2566
        return FALSE;
2567
    }
2568
 
2569
  flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2570
           | SEC_LINKER_CREATED | SEC_READONLY);
2571
  htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2572
  if (!htab->relgot
2573
      || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2574
    return FALSE;
2575
 
2576
  return TRUE;
2577
}
2578
 
2579
/* We have to create .dynsbss and .rela.sbss here so that they get mapped
2580
   to output sections (just like _bfd_elf_create_dynamic_sections has
2581
   to create .dynbss and .rela.bss).  */
2582
 
2583
static bfd_boolean
2584
ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2585
{
2586
  struct ppc_elf_link_hash_table *htab;
2587
  asection *s;
2588
  flagword flags;
2589
 
2590
  htab = ppc_elf_hash_table (info);
2591
 
2592
  if (htab->got == NULL
2593
      && !ppc_elf_create_got (abfd, info))
2594
    return FALSE;
2595
 
2596
  if (!_bfd_elf_create_dynamic_sections (abfd, info))
2597
    return FALSE;
2598
 
2599
  flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2600
           | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2601
 
2602
  s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2603
  htab->glink = s;
2604
  if (s == NULL
2605
      || !bfd_set_section_alignment (abfd, s, 4))
2606
    return FALSE;
2607
 
2608
  htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2609
  s = bfd_make_section_with_flags (abfd, ".dynsbss",
2610
                                   SEC_ALLOC | SEC_LINKER_CREATED);
2611
  htab->dynsbss = s;
2612
  if (s == NULL)
2613
    return FALSE;
2614
 
2615
  if (! info->shared)
2616
    {
2617
      htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2618
      s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2619
      htab->relsbss = s;
2620
      if (s == NULL
2621
          || ! bfd_set_section_alignment (abfd, s, 2))
2622
        return FALSE;
2623
    }
2624
 
2625
  if (htab->is_vxworks
2626
      && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2627
    return FALSE;
2628
 
2629
  htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2630
  htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2631
  if (s == NULL)
2632
    abort ();
2633
 
2634
  flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2635
  if (htab->plt_type == PLT_VXWORKS)
2636
    /* The VxWorks PLT is a loaded section with contents.  */
2637
    flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2638
  return bfd_set_section_flags (abfd, s, flags);
2639
}
2640
 
2641
/* Copy the extra info we tack onto an elf_link_hash_entry.  */
2642
 
2643
static void
2644
ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2645
                              struct elf_link_hash_entry *dir,
2646
                              struct elf_link_hash_entry *ind)
2647
{
2648
  struct ppc_elf_link_hash_entry *edir, *eind;
2649
 
2650
  edir = (struct ppc_elf_link_hash_entry *) dir;
2651
  eind = (struct ppc_elf_link_hash_entry *) ind;
2652
 
2653
  if (eind->dyn_relocs != NULL)
2654
    {
2655
      if (edir->dyn_relocs != NULL)
2656
        {
2657
          struct ppc_elf_dyn_relocs **pp;
2658
          struct ppc_elf_dyn_relocs *p;
2659
 
2660
          /* Add reloc counts against the indirect sym to the direct sym
2661
             list.  Merge any entries against the same section.  */
2662
          for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2663
            {
2664
              struct ppc_elf_dyn_relocs *q;
2665
 
2666
              for (q = edir->dyn_relocs; q != NULL; q = q->next)
2667
                if (q->sec == p->sec)
2668
                  {
2669
                    q->pc_count += p->pc_count;
2670
                    q->count += p->count;
2671
                    *pp = p->next;
2672
                    break;
2673
                  }
2674
              if (q == NULL)
2675
                pp = &p->next;
2676
            }
2677
          *pp = edir->dyn_relocs;
2678
        }
2679
 
2680
      edir->dyn_relocs = eind->dyn_relocs;
2681
      eind->dyn_relocs = NULL;
2682
    }
2683
 
2684
  edir->tls_mask |= eind->tls_mask;
2685
  edir->has_sda_refs |= eind->has_sda_refs;
2686
 
2687
  /* If called to transfer flags for a weakdef during processing
2688
     of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2689
     We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
2690
  if (!(ELIMINATE_COPY_RELOCS
2691
        && eind->elf.root.type != bfd_link_hash_indirect
2692
        && edir->elf.dynamic_adjusted))
2693
    edir->elf.non_got_ref |= eind->elf.non_got_ref;
2694
 
2695
  edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2696
  edir->elf.ref_regular |= eind->elf.ref_regular;
2697
  edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2698
  edir->elf.needs_plt |= eind->elf.needs_plt;
2699
  edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2700
 
2701
  /* If we were called to copy over info for a weak sym, that's all.  */
2702
  if (eind->elf.root.type != bfd_link_hash_indirect)
2703
    return;
2704
 
2705
  /* Copy over the GOT refcount entries that we may have already seen to
2706
     the symbol which just became indirect.  */
2707
  edir->elf.got.refcount += eind->elf.got.refcount;
2708
  eind->elf.got.refcount = 0;
2709
 
2710
  /* And plt entries.  */
2711
  if (eind->elf.plt.plist != NULL)
2712
    {
2713
      if (edir->elf.plt.plist != NULL)
2714
        {
2715
          struct plt_entry **entp;
2716
          struct plt_entry *ent;
2717
 
2718
          for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2719
            {
2720
              struct plt_entry *dent;
2721
 
2722
              for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2723
                if (dent->sec == ent->sec && dent->addend == ent->addend)
2724
                  {
2725
                    dent->plt.refcount += ent->plt.refcount;
2726
                    *entp = ent->next;
2727
                    break;
2728
                  }
2729
              if (dent == NULL)
2730
                entp = &ent->next;
2731
            }
2732
          *entp = edir->elf.plt.plist;
2733
        }
2734
 
2735
      edir->elf.plt.plist = eind->elf.plt.plist;
2736
      eind->elf.plt.plist = NULL;
2737
    }
2738
 
2739
  if (eind->elf.dynindx != -1)
2740
    {
2741
      if (edir->elf.dynindx != -1)
2742
        _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2743
                                edir->elf.dynstr_index);
2744
      edir->elf.dynindx = eind->elf.dynindx;
2745
      edir->elf.dynstr_index = eind->elf.dynstr_index;
2746
      eind->elf.dynindx = -1;
2747
      eind->elf.dynstr_index = 0;
2748
    }
2749
}
2750
 
2751
/* Hook called by the linker routine which adds symbols from an object
2752
   file.  We use it to put .comm items in .sbss, and not .bss.  */
2753
 
2754
static bfd_boolean
2755
ppc_elf_add_symbol_hook (bfd *abfd,
2756
                         struct bfd_link_info *info,
2757
                         Elf_Internal_Sym *sym,
2758
                         const char **namep ATTRIBUTE_UNUSED,
2759
                         flagword *flagsp ATTRIBUTE_UNUSED,
2760
                         asection **secp,
2761
                         bfd_vma *valp)
2762
{
2763
  if (sym->st_shndx == SHN_COMMON
2764
      && !info->relocatable
2765
      && is_ppc_elf (info->output_bfd)
2766
      && sym->st_size <= elf_gp_size (abfd))
2767
    {
2768
      /* Common symbols less than or equal to -G nn bytes are automatically
2769
         put into .sbss.  */
2770
      struct ppc_elf_link_hash_table *htab;
2771
 
2772
      htab = ppc_elf_hash_table (info);
2773
      if (htab->sbss == NULL)
2774
        {
2775
          flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2776
 
2777
          if (!htab->elf.dynobj)
2778
            htab->elf.dynobj = abfd;
2779
 
2780
          htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2781
                                                           ".sbss",
2782
                                                           flags);
2783
          if (htab->sbss == NULL)
2784
            return FALSE;
2785
        }
2786
 
2787
      *secp = htab->sbss;
2788
      *valp = sym->st_size;
2789
    }
2790
 
2791
  return TRUE;
2792
}
2793
 
2794
static bfd_boolean
2795
create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2796
                  elf_linker_section_t *lsect)
2797
{
2798
  lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2799
                                     TRUE, FALSE, TRUE);
2800
  if (lsect->sym == NULL)
2801
    return FALSE;
2802
  if (lsect->sym->root.type == bfd_link_hash_new)
2803
    lsect->sym->non_elf = 0;
2804
  lsect->sym->ref_regular = 1;
2805
  return TRUE;
2806
}
2807
 
2808
/* Create a special linker section.  */
2809
 
2810
static bfd_boolean
2811
ppc_elf_create_linker_section (bfd *abfd,
2812
                               struct bfd_link_info *info,
2813
                               flagword flags,
2814
                               elf_linker_section_t *lsect)
2815
{
2816
  struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2817
  asection *s;
2818
 
2819
  flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2820
            | SEC_LINKER_CREATED);
2821
 
2822
  /* Record the first bfd that needs the special sections.  */
2823
  if (!htab->elf.dynobj)
2824
    htab->elf.dynobj = abfd;
2825
 
2826
  s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2827
                                          lsect->name,
2828
                                          flags);
2829
  if (s == NULL
2830
      || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2831
    return FALSE;
2832
  lsect->section = s;
2833
 
2834
  return create_sdata_sym (htab, lsect);
2835
}
2836
 
2837
/* Find a linker generated pointer with a given addend and type.  */
2838
 
2839
static elf_linker_section_pointers_t *
2840
elf_find_pointer_linker_section
2841
  (elf_linker_section_pointers_t *linker_pointers,
2842
   bfd_vma addend,
2843
   elf_linker_section_t *lsect)
2844
{
2845
  for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2846
    if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2847
      return linker_pointers;
2848
 
2849
  return NULL;
2850
}
2851
 
2852
/* Allocate a pointer to live in a linker created section.  */
2853
 
2854
static bfd_boolean
2855
elf_create_pointer_linker_section (bfd *abfd,
2856
                                   elf_linker_section_t *lsect,
2857
                                   struct elf_link_hash_entry *h,
2858
                                   const Elf_Internal_Rela *rel)
2859
{
2860
  elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2861
  elf_linker_section_pointers_t *linker_section_ptr;
2862
  unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2863
  bfd_size_type amt;
2864
 
2865
  BFD_ASSERT (lsect != NULL);
2866
 
2867
  /* Is this a global symbol?  */
2868
  if (h != NULL)
2869
    {
2870
      struct ppc_elf_link_hash_entry *eh;
2871
 
2872
      /* Has this symbol already been allocated?  If so, our work is done.  */
2873
      eh = (struct ppc_elf_link_hash_entry *) h;
2874
      if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2875
                                           rel->r_addend,
2876
                                           lsect))
2877
        return TRUE;
2878
 
2879
      ptr_linker_section_ptr = &eh->linker_section_pointer;
2880
    }
2881
  else
2882
    {
2883
      BFD_ASSERT (is_ppc_elf (abfd));
2884
 
2885
      /* Allocation of a pointer to a local symbol.  */
2886
      elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2887
 
2888
      /* Allocate a table to hold the local symbols if first time.  */
2889
      if (!ptr)
2890
        {
2891
          unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2892
 
2893
          amt = num_symbols;
2894
          amt *= sizeof (elf_linker_section_pointers_t *);
2895
          ptr = bfd_zalloc (abfd, amt);
2896
 
2897
          if (!ptr)
2898
            return FALSE;
2899
 
2900
          elf_local_ptr_offsets (abfd) = ptr;
2901
        }
2902
 
2903
      /* Has this symbol already been allocated?  If so, our work is done.  */
2904
      if (elf_find_pointer_linker_section (ptr[r_symndx],
2905
                                           rel->r_addend,
2906
                                           lsect))
2907
        return TRUE;
2908
 
2909
      ptr_linker_section_ptr = &ptr[r_symndx];
2910
    }
2911
 
2912
  /* Allocate space for a pointer in the linker section, and allocate
2913
     a new pointer record from internal memory.  */
2914
  BFD_ASSERT (ptr_linker_section_ptr != NULL);
2915
  amt = sizeof (elf_linker_section_pointers_t);
2916
  linker_section_ptr = bfd_alloc (abfd, amt);
2917
 
2918
  if (!linker_section_ptr)
2919
    return FALSE;
2920
 
2921
  linker_section_ptr->next = *ptr_linker_section_ptr;
2922
  linker_section_ptr->addend = rel->r_addend;
2923
  linker_section_ptr->lsect = lsect;
2924
  *ptr_linker_section_ptr = linker_section_ptr;
2925
 
2926
  linker_section_ptr->offset = lsect->section->size;
2927
  lsect->section->size += 4;
2928
 
2929
#ifdef DEBUG
2930
  fprintf (stderr,
2931
           "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2932
           lsect->name, (long) linker_section_ptr->offset,
2933
           (long) lsect->section->size);
2934
#endif
2935
 
2936
  return TRUE;
2937
}
2938
 
2939
static bfd_boolean
2940
update_local_sym_info (bfd *abfd,
2941
                       Elf_Internal_Shdr *symtab_hdr,
2942
                       unsigned long r_symndx,
2943
                       int tls_type)
2944
{
2945
  bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2946
  char *local_got_tls_masks;
2947
 
2948
  if (local_got_refcounts == NULL)
2949
    {
2950
      bfd_size_type size = symtab_hdr->sh_info;
2951
 
2952
      size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2953
      local_got_refcounts = bfd_zalloc (abfd, size);
2954
      if (local_got_refcounts == NULL)
2955
        return FALSE;
2956
      elf_local_got_refcounts (abfd) = local_got_refcounts;
2957
    }
2958
 
2959
  local_got_refcounts[r_symndx] += 1;
2960
  local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2961
  local_got_tls_masks[r_symndx] |= tls_type;
2962
  return TRUE;
2963
}
2964
 
2965
static bfd_boolean
2966
update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2967
                 asection *sec, bfd_vma addend)
2968
{
2969
  struct plt_entry *ent;
2970
 
2971
  if (addend < 32768)
2972
    sec = NULL;
2973
  for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2974
    if (ent->sec == sec && ent->addend == addend)
2975
      break;
2976
  if (ent == NULL)
2977
    {
2978
      bfd_size_type amt = sizeof (*ent);
2979
      ent = bfd_alloc (abfd, amt);
2980
      if (ent == NULL)
2981
        return FALSE;
2982
      ent->next = h->plt.plist;
2983
      ent->sec = sec;
2984
      ent->addend = addend;
2985
      ent->plt.refcount = 0;
2986
      h->plt.plist = ent;
2987
    }
2988
  ent->plt.refcount += 1;
2989
  return TRUE;
2990
}
2991
 
2992
static struct plt_entry *
2993
find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2994
{
2995
  struct plt_entry *ent;
2996
 
2997
  if (addend < 32768)
2998
    sec = NULL;
2999
  for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3000
    if (ent->sec == sec && ent->addend == addend)
3001
      break;
3002
  return ent;
3003
}
3004
 
3005
static void
3006
bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3007
{
3008
  (*_bfd_error_handler)
3009
    (_("%B: relocation %s cannot be used when making a shared object"),
3010
     abfd,
3011
     ppc_elf_howto_table[r_type]->name);
3012
  bfd_set_error (bfd_error_bad_value);
3013
}
3014
 
3015
/* Look through the relocs for a section during the first phase, and
3016
   allocate space in the global offset table or procedure linkage
3017
   table.  */
3018
 
3019
static bfd_boolean
3020
ppc_elf_check_relocs (bfd *abfd,
3021
                      struct bfd_link_info *info,
3022
                      asection *sec,
3023
                      const Elf_Internal_Rela *relocs)
3024
{
3025
  struct ppc_elf_link_hash_table *htab;
3026
  Elf_Internal_Shdr *symtab_hdr;
3027
  struct elf_link_hash_entry **sym_hashes;
3028
  const Elf_Internal_Rela *rel;
3029
  const Elf_Internal_Rela *rel_end;
3030
  asection *got2, *sreloc;
3031
 
3032
  if (info->relocatable)
3033
    return TRUE;
3034
 
3035
  /* Don't do anything special with non-loaded, non-alloced sections.
3036
     In particular, any relocs in such sections should not affect GOT
3037
     and PLT reference counting (ie. we don't allow them to create GOT
3038
     or PLT entries), there's no possibility or desire to optimize TLS
3039
     relocs, and there's not much point in propagating relocs to shared
3040
     libs that the dynamic linker won't relocate.  */
3041
  if ((sec->flags & SEC_ALLOC) == 0)
3042
    return TRUE;
3043
 
3044
#ifdef DEBUG
3045
  _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3046
                      sec, abfd);
3047
#endif
3048
 
3049
  BFD_ASSERT (is_ppc_elf (abfd));
3050
 
3051
  /* Initialize howto table if not already done.  */
3052
  if (!ppc_elf_howto_table[R_PPC_ADDR32])
3053
    ppc_elf_howto_init ();
3054
 
3055
  htab = ppc_elf_hash_table (info);
3056
  symtab_hdr = &elf_symtab_hdr (abfd);
3057
  sym_hashes = elf_sym_hashes (abfd);
3058
  got2 = bfd_get_section_by_name (abfd, ".got2");
3059
  sreloc = NULL;
3060
 
3061
  rel_end = relocs + sec->reloc_count;
3062
  for (rel = relocs; rel < rel_end; rel++)
3063
    {
3064
      unsigned long r_symndx;
3065
      enum elf_ppc_reloc_type r_type;
3066
      struct elf_link_hash_entry *h;
3067
      int tls_type = 0;
3068
 
3069
      r_symndx = ELF32_R_SYM (rel->r_info);
3070
      if (r_symndx < symtab_hdr->sh_info)
3071
        h = NULL;
3072
      else
3073
        {
3074
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3075
          while (h->root.type == bfd_link_hash_indirect
3076
                 || h->root.type == bfd_link_hash_warning)
3077
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
3078
        }
3079
 
3080
      /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3081
         This shows up in particular in an R_PPC_ADDR32 in the eabi
3082
         startup code.  */
3083
      if (h != NULL
3084
          && htab->got == NULL
3085
          && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3086
        {
3087
          if (htab->elf.dynobj == NULL)
3088
            htab->elf.dynobj = abfd;
3089
          if (!ppc_elf_create_got (htab->elf.dynobj, info))
3090
            return FALSE;
3091
          BFD_ASSERT (h == htab->elf.hgot);
3092
        }
3093
 
3094
      r_type = ELF32_R_TYPE (rel->r_info);
3095
      switch (r_type)
3096
        {
3097
        case R_PPC_GOT_TLSLD16:
3098
        case R_PPC_GOT_TLSLD16_LO:
3099
        case R_PPC_GOT_TLSLD16_HI:
3100
        case R_PPC_GOT_TLSLD16_HA:
3101
          tls_type = TLS_TLS | TLS_LD;
3102
          goto dogottls;
3103
 
3104
        case R_PPC_GOT_TLSGD16:
3105
        case R_PPC_GOT_TLSGD16_LO:
3106
        case R_PPC_GOT_TLSGD16_HI:
3107
        case R_PPC_GOT_TLSGD16_HA:
3108
          tls_type = TLS_TLS | TLS_GD;
3109
          goto dogottls;
3110
 
3111
        case R_PPC_GOT_TPREL16:
3112
        case R_PPC_GOT_TPREL16_LO:
3113
        case R_PPC_GOT_TPREL16_HI:
3114
        case R_PPC_GOT_TPREL16_HA:
3115
          if (info->shared)
3116
            info->flags |= DF_STATIC_TLS;
3117
          tls_type = TLS_TLS | TLS_TPREL;
3118
          goto dogottls;
3119
 
3120
        case R_PPC_GOT_DTPREL16:
3121
        case R_PPC_GOT_DTPREL16_LO:
3122
        case R_PPC_GOT_DTPREL16_HI:
3123
        case R_PPC_GOT_DTPREL16_HA:
3124
          tls_type = TLS_TLS | TLS_DTPREL;
3125
        dogottls:
3126
          sec->has_tls_reloc = 1;
3127
          /* Fall thru */
3128
 
3129
          /* GOT16 relocations */
3130
        case R_PPC_GOT16:
3131
        case R_PPC_GOT16_LO:
3132
        case R_PPC_GOT16_HI:
3133
        case R_PPC_GOT16_HA:
3134
          /* This symbol requires a global offset table entry.  */
3135
          if (htab->got == NULL)
3136
            {
3137
              if (htab->elf.dynobj == NULL)
3138
                htab->elf.dynobj = abfd;
3139
              if (!ppc_elf_create_got (htab->elf.dynobj, info))
3140
                return FALSE;
3141
            }
3142
          if (h != NULL)
3143
            {
3144
              h->got.refcount += 1;
3145
              ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3146
            }
3147
          else
3148
            /* This is a global offset table entry for a local symbol.  */
3149
            if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3150
              return FALSE;
3151
          break;
3152
 
3153
          /* Indirect .sdata relocation.  */
3154
        case R_PPC_EMB_SDAI16:
3155
          if (info->shared)
3156
            {
3157
              bad_shared_reloc (abfd, r_type);
3158
              return FALSE;
3159
            }
3160
          if (htab->sdata[0].section == NULL
3161
              && !ppc_elf_create_linker_section (abfd, info, 0,
3162
                                                 &htab->sdata[0]))
3163
            return FALSE;
3164
          if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3165
                                                  h, rel))
3166
            return FALSE;
3167
          if (h != NULL)
3168
            {
3169
              ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3170
              h->non_got_ref = TRUE;
3171
            }
3172
          break;
3173
 
3174
          /* Indirect .sdata2 relocation.  */
3175
        case R_PPC_EMB_SDA2I16:
3176
          if (info->shared)
3177
            {
3178
              bad_shared_reloc (abfd, r_type);
3179
              return FALSE;
3180
            }
3181
          if (htab->sdata[1].section == NULL
3182
              && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3183
                                                 &htab->sdata[1]))
3184
            return FALSE;
3185
          if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3186
                                                  h, rel))
3187
            return FALSE;
3188
          if (h != NULL)
3189
            {
3190
              ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3191
              h->non_got_ref = TRUE;
3192
            }
3193
          break;
3194
 
3195
        case R_PPC_SDAREL16:
3196
          if (info->shared)
3197
            {
3198
              bad_shared_reloc (abfd, r_type);
3199
              return FALSE;
3200
            }
3201
          if (htab->sdata[0].sym == NULL
3202
              && !create_sdata_sym (htab, &htab->sdata[0]))
3203
            return FALSE;
3204
          if (h != NULL)
3205
            {
3206
              ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3207
              h->non_got_ref = TRUE;
3208
            }
3209
          break;
3210
 
3211
        case R_PPC_EMB_SDA2REL:
3212
          if (info->shared)
3213
            {
3214
              bad_shared_reloc (abfd, r_type);
3215
              return FALSE;
3216
            }
3217
          if (htab->sdata[1].sym == NULL
3218
              && !create_sdata_sym (htab, &htab->sdata[1]))
3219
            return FALSE;
3220
          if (h != NULL)
3221
            {
3222
              ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3223
              h->non_got_ref = TRUE;
3224
            }
3225
          break;
3226
 
3227
        case R_PPC_EMB_SDA21:
3228
        case R_PPC_EMB_RELSDA:
3229
          if (info->shared)
3230
            {
3231
              bad_shared_reloc (abfd, r_type);
3232
              return FALSE;
3233
            }
3234
          if (htab->sdata[0].sym == NULL
3235
              && !create_sdata_sym (htab, &htab->sdata[0]))
3236
            return FALSE;
3237
          if (htab->sdata[1].sym == NULL
3238
              && !create_sdata_sym (htab, &htab->sdata[1]))
3239
            return FALSE;
3240
          if (h != NULL)
3241
            {
3242
              ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3243
              h->non_got_ref = TRUE;
3244
            }
3245
          break;
3246
 
3247
        case R_PPC_EMB_NADDR32:
3248
        case R_PPC_EMB_NADDR16:
3249
        case R_PPC_EMB_NADDR16_LO:
3250
        case R_PPC_EMB_NADDR16_HI:
3251
        case R_PPC_EMB_NADDR16_HA:
3252
          if (info->shared)
3253
            {
3254
              bad_shared_reloc (abfd, r_type);
3255
              return FALSE;
3256
            }
3257
          if (h != NULL)
3258
            h->non_got_ref = TRUE;
3259
          break;
3260
 
3261
        case R_PPC_PLT32:
3262
        case R_PPC_PLTREL24:
3263
        case R_PPC_PLTREL32:
3264
        case R_PPC_PLT16_LO:
3265
        case R_PPC_PLT16_HI:
3266
        case R_PPC_PLT16_HA:
3267
#ifdef DEBUG
3268
          fprintf (stderr, "Reloc requires a PLT entry\n");
3269
#endif
3270
          /* This symbol requires a procedure linkage table entry.  We
3271
             actually build the entry in finish_dynamic_symbol,
3272
             because this might be a case of linking PIC code without
3273
             linking in any dynamic objects, in which case we don't
3274
             need to generate a procedure linkage table after all.  */
3275
 
3276
          if (h == NULL)
3277
            {
3278
              /* It does not make sense to have a procedure linkage
3279
                 table entry for a local symbol.  */
3280
              (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3281
                                       "local symbol"),
3282
                                     abfd,
3283
                                     sec,
3284
                                     (long) rel->r_offset,
3285
                                     ppc_elf_howto_table[r_type]->name);
3286
              bfd_set_error (bfd_error_bad_value);
3287
              return FALSE;
3288
            }
3289
          else
3290
            {
3291
              bfd_vma addend = 0;
3292
 
3293
              if (r_type == R_PPC_PLTREL24)
3294
                {
3295
                  ppc_elf_tdata (abfd)->makes_plt_call = 1;
3296
                  addend = rel->r_addend;
3297
                }
3298
              h->needs_plt = 1;
3299
              if (!update_plt_info (abfd, h, got2, addend))
3300
                return FALSE;
3301
            }
3302
          break;
3303
 
3304
          /* The following relocations don't need to propagate the
3305
             relocation if linking a shared object since they are
3306
             section relative.  */
3307
        case R_PPC_SECTOFF:
3308
        case R_PPC_SECTOFF_LO:
3309
        case R_PPC_SECTOFF_HI:
3310
        case R_PPC_SECTOFF_HA:
3311
        case R_PPC_DTPREL16:
3312
        case R_PPC_DTPREL16_LO:
3313
        case R_PPC_DTPREL16_HI:
3314
        case R_PPC_DTPREL16_HA:
3315
        case R_PPC_TOC16:
3316
          break;
3317
 
3318
        case R_PPC_REL16:
3319
        case R_PPC_REL16_LO:
3320
        case R_PPC_REL16_HI:
3321
        case R_PPC_REL16_HA:
3322
          ppc_elf_tdata (abfd)->has_rel16 = 1;
3323
          break;
3324
 
3325
          /* These are just markers.  */
3326
        case R_PPC_TLS:
3327
        case R_PPC_EMB_MRKREF:
3328
        case R_PPC_NONE:
3329
        case R_PPC_max:
3330
          break;
3331
 
3332
          /* These should only appear in dynamic objects.  */
3333
        case R_PPC_COPY:
3334
        case R_PPC_GLOB_DAT:
3335
        case R_PPC_JMP_SLOT:
3336
        case R_PPC_RELATIVE:
3337
          break;
3338
 
3339
          /* These aren't handled yet.  We'll report an error later.  */
3340
        case R_PPC_ADDR30:
3341
        case R_PPC_EMB_RELSEC16:
3342
        case R_PPC_EMB_RELST_LO:
3343
        case R_PPC_EMB_RELST_HI:
3344
        case R_PPC_EMB_RELST_HA:
3345
        case R_PPC_EMB_BIT_FLD:
3346
          break;
3347
 
3348
          /* This refers only to functions defined in the shared library.  */
3349
        case R_PPC_LOCAL24PC:
3350
          if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3351
            {
3352
              htab->plt_type = PLT_OLD;
3353
              htab->old_bfd = abfd;
3354
            }
3355
          break;
3356
 
3357
          /* This relocation describes the C++ object vtable hierarchy.
3358
             Reconstruct it for later use during GC.  */
3359
        case R_PPC_GNU_VTINHERIT:
3360
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3361
            return FALSE;
3362
          break;
3363
 
3364
          /* This relocation describes which C++ vtable entries are actually
3365
             used.  Record for later use during GC.  */
3366
        case R_PPC_GNU_VTENTRY:
3367
          BFD_ASSERT (h != NULL);
3368
          if (h != NULL
3369
              && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3370
            return FALSE;
3371
          break;
3372
 
3373
          /* We shouldn't really be seeing these.  */
3374
        case R_PPC_TPREL32:
3375
          if (info->shared)
3376
            info->flags |= DF_STATIC_TLS;
3377
          goto dodyn;
3378
 
3379
          /* Nor these.  */
3380
        case R_PPC_DTPMOD32:
3381
        case R_PPC_DTPREL32:
3382
          goto dodyn;
3383
 
3384
        case R_PPC_TPREL16:
3385
        case R_PPC_TPREL16_LO:
3386
        case R_PPC_TPREL16_HI:
3387
        case R_PPC_TPREL16_HA:
3388
          if (info->shared)
3389
            info->flags |= DF_STATIC_TLS;
3390
          goto dodyn;
3391
 
3392
        case R_PPC_REL32:
3393
          if (h == NULL
3394
              && got2 != NULL
3395
              && (sec->flags & SEC_CODE) != 0
3396
              && (info->shared || info->pie)
3397
              && htab->plt_type == PLT_UNSET)
3398
            {
3399
              /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3400
                 the start of a function, which assembles to a REL32
3401
                 reference to .got2.  If we detect one of these, then
3402
                 force the old PLT layout because the linker cannot
3403
                 reliably deduce the GOT pointer value needed for
3404
                 PLT call stubs.  */
3405
              asection *s;
3406
 
3407
              s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3408
                                             r_symndx);
3409
              if (s == got2)
3410
                {
3411
                  htab->plt_type = PLT_OLD;
3412
                  htab->old_bfd = abfd;
3413
                }
3414
            }
3415
          if (h == NULL || h == htab->elf.hgot)
3416
            break;
3417
          /* fall through */
3418
 
3419
        case R_PPC_ADDR32:
3420
        case R_PPC_ADDR16:
3421
        case R_PPC_ADDR16_LO:
3422
        case R_PPC_ADDR16_HI:
3423
        case R_PPC_ADDR16_HA:
3424
        case R_PPC_UADDR32:
3425
        case R_PPC_UADDR16:
3426
          if (h != NULL && !info->shared)
3427
            {
3428
              /* We may need a plt entry if the symbol turns out to be
3429
                 a function defined in a dynamic object.  */
3430
              if (!update_plt_info (abfd, h, NULL, 0))
3431
                return FALSE;
3432
 
3433
              /* We may need a copy reloc too.  */
3434
              h->non_got_ref = 1;
3435
              h->pointer_equality_needed = 1;
3436
            }
3437
          goto dodyn;
3438
 
3439
        case R_PPC_REL24:
3440
        case R_PPC_REL14:
3441
        case R_PPC_REL14_BRTAKEN:
3442
        case R_PPC_REL14_BRNTAKEN:
3443
          if (h == NULL)
3444
            break;
3445
          if (h == htab->elf.hgot)
3446
            {
3447
              if (htab->plt_type == PLT_UNSET)
3448
                {
3449
                  htab->plt_type = PLT_OLD;
3450
                  htab->old_bfd = abfd;
3451
                }
3452
              break;
3453
            }
3454
          /* fall through */
3455
 
3456
        case R_PPC_ADDR24:
3457
        case R_PPC_ADDR14:
3458
        case R_PPC_ADDR14_BRTAKEN:
3459
        case R_PPC_ADDR14_BRNTAKEN:
3460
          if (h != NULL && !info->shared)
3461
            {
3462
              /* We may need a plt entry if the symbol turns out to be
3463
                 a function defined in a dynamic object.  */
3464
              if (!update_plt_info (abfd, h, NULL, 0))
3465
                return FALSE;
3466
              break;
3467
            }
3468
 
3469
        dodyn:
3470
          /* If we are creating a shared library, and this is a reloc
3471
             against a global symbol, or a non PC relative reloc
3472
             against a local symbol, then we need to copy the reloc
3473
             into the shared library.  However, if we are linking with
3474
             -Bsymbolic, we do not need to copy a reloc against a
3475
             global symbol which is defined in an object we are
3476
             including in the link (i.e., DEF_REGULAR is set).  At
3477
             this point we have not seen all the input files, so it is
3478
             possible that DEF_REGULAR is not set now but will be set
3479
             later (it is never cleared).  In case of a weak definition,
3480
             DEF_REGULAR may be cleared later by a strong definition in
3481
             a shared library.  We account for that possibility below by
3482
             storing information in the dyn_relocs field of the hash
3483
             table entry.  A similar situation occurs when creating
3484
             shared libraries and symbol visibility changes render the
3485
             symbol local.
3486
 
3487
             If on the other hand, we are creating an executable, we
3488
             may need to keep relocations for symbols satisfied by a
3489
             dynamic library if we manage to avoid copy relocs for the
3490
             symbol.  */
3491
          if ((info->shared
3492
               && (MUST_BE_DYN_RELOC (r_type)
3493
                   || (h != NULL
3494
                       && (! info->symbolic
3495
                           || h->root.type == bfd_link_hash_defweak
3496
                           || !h->def_regular))))
3497
              || (ELIMINATE_COPY_RELOCS
3498
                  && !info->shared
3499
                  && h != NULL
3500
                  && (h->root.type == bfd_link_hash_defweak
3501
                      || !h->def_regular)))
3502
            {
3503
              struct ppc_elf_dyn_relocs *p;
3504
              struct ppc_elf_dyn_relocs **head;
3505
 
3506
#ifdef DEBUG
3507
              fprintf (stderr,
3508
                       "ppc_elf_check_relocs needs to "
3509
                       "create relocation for %s\n",
3510
                       (h && h->root.root.string
3511
                        ? h->root.root.string : "<unknown>"));
3512
#endif
3513
              if (sreloc == NULL)
3514
                {
3515
                  const char *name;
3516
 
3517
                  name = (bfd_elf_string_from_elf_section
3518
                          (abfd,
3519
                           elf_elfheader (abfd)->e_shstrndx,
3520
                           elf_section_data (sec)->rel_hdr.sh_name));
3521
                  if (name == NULL)
3522
                    return FALSE;
3523
 
3524
                  BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3525
                              && strcmp (bfd_get_section_name (abfd, sec),
3526
                                         name + 5) == 0);
3527
 
3528
                  if (htab->elf.dynobj == NULL)
3529
                    htab->elf.dynobj = abfd;
3530
                  sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3531
                  if (sreloc == NULL)
3532
                    {
3533
                      flagword flags;
3534
 
3535
                      flags = (SEC_HAS_CONTENTS | SEC_READONLY
3536
                               | SEC_IN_MEMORY | SEC_LINKER_CREATED
3537
                               | SEC_ALLOC | SEC_LOAD);
3538
                      sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3539
                                                            name,
3540
                                                            flags);
3541
                      if (sreloc == NULL
3542
                          || ! bfd_set_section_alignment (htab->elf.dynobj,
3543
                                                          sreloc, 2))
3544
                        return FALSE;
3545
                    }
3546
                  elf_section_data (sec)->sreloc = sreloc;
3547
                }
3548
 
3549
              /* If this is a global symbol, we count the number of
3550
                 relocations we need for this symbol.  */
3551
              if (h != NULL)
3552
                {
3553
                  head = &ppc_elf_hash_entry (h)->dyn_relocs;
3554
                }
3555
              else
3556
                {
3557
                  /* Track dynamic relocs needed for local syms too.
3558
                     We really need local syms available to do this
3559
                     easily.  Oh well.  */
3560
 
3561
                  asection *s;
3562
                  void *vpp;
3563
 
3564
                  s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3565
                                                 sec, r_symndx);
3566
                  if (s == NULL)
3567
                    return FALSE;
3568
 
3569
                  vpp = &elf_section_data (s)->local_dynrel;
3570
                  head = (struct ppc_elf_dyn_relocs **) vpp;
3571
                }
3572
 
3573
              p = *head;
3574
              if (p == NULL || p->sec != sec)
3575
                {
3576
                  p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3577
                  if (p == NULL)
3578
                    return FALSE;
3579
                  p->next = *head;
3580
                  *head = p;
3581
                  p->sec = sec;
3582
                  p->count = 0;
3583
                  p->pc_count = 0;
3584
                }
3585
 
3586
              p->count += 1;
3587
              if (!MUST_BE_DYN_RELOC (r_type))
3588
                p->pc_count += 1;
3589
            }
3590
 
3591
          break;
3592
        }
3593
    }
3594
 
3595
  return TRUE;
3596
}
3597
 
3598
 
3599
/* Merge object attributes from IBFD into OBFD.  Raise an error if
3600
   there are conflicting attributes.  */
3601
static bfd_boolean
3602
ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3603
{
3604
  obj_attribute *in_attr, *in_attrs;
3605
  obj_attribute *out_attr, *out_attrs;
3606
 
3607
  if (!elf_known_obj_attributes_proc (obfd)[0].i)
3608
    {
3609
      /* This is the first object.  Copy the attributes.  */
3610
      _bfd_elf_copy_obj_attributes (ibfd, obfd);
3611
 
3612
      /* Use the Tag_null value to indicate the attributes have been
3613
         initialized.  */
3614
      elf_known_obj_attributes_proc (obfd)[0].i = 1;
3615
 
3616
      return TRUE;
3617
    }
3618
 
3619
  in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3620
  out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3621
 
3622
  /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3623
     non-conflicting ones.  */
3624
  in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3625
  out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3626
  if (in_attr->i != out_attr->i)
3627
    {
3628
      out_attr->type = 1;
3629
      if (out_attr->i == 0)
3630
        out_attr->i = in_attr->i;
3631
      else if (in_attr->i == 0)
3632
        ;
3633
      else if (out_attr->i == 1 && in_attr->i == 2)
3634
        _bfd_error_handler
3635
          (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3636
      else if (out_attr->i == 2 && in_attr->i == 1)
3637
        _bfd_error_handler
3638
          (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3639
      else if (in_attr->i > 2)
3640
        _bfd_error_handler
3641
          (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3642
           in_attr->i);
3643
      else
3644
        _bfd_error_handler
3645
          (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3646
           out_attr->i);
3647
    }
3648
 
3649
  /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3650
     merge non-conflicting ones.  */
3651
  in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3652
  out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3653
  if (in_attr->i != out_attr->i)
3654
    {
3655
      const char *in_abi = NULL, *out_abi = NULL;
3656
 
3657
      switch (in_attr->i)
3658
        {
3659
        case 1: in_abi = "generic"; break;
3660
        case 2: in_abi = "AltiVec"; break;
3661
        case 3: in_abi = "SPE"; break;
3662
        }
3663
 
3664
      switch (out_attr->i)
3665
        {
3666
        case 1: out_abi = "generic"; break;
3667
        case 2: out_abi = "AltiVec"; break;
3668
        case 3: out_abi = "SPE"; break;
3669
        }
3670
 
3671
      out_attr->type = 1;
3672
      if (out_attr->i == 0)
3673
        out_attr->i = in_attr->i;
3674
      else if (in_attr->i == 0)
3675
        ;
3676
      /* For now, allow generic to transition to AltiVec or SPE
3677
         without a warning.  If GCC marked files with their stack
3678
         alignment and used don't-care markings for files which are
3679
         not affected by the vector ABI, we could warn about this
3680
         case too.  */
3681
      else if (out_attr->i == 1)
3682
        out_attr->i = in_attr->i;
3683
      else if (in_attr->i == 1)
3684
        ;
3685
      else if (in_abi == NULL)
3686
        _bfd_error_handler
3687
          (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3688
           in_attr->i);
3689
      else if (out_abi == NULL)
3690
        _bfd_error_handler
3691
          (_("Warning: %B uses unknown vector ABI %d"), obfd,
3692
           in_attr->i);
3693
      else
3694
        _bfd_error_handler
3695
          (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3696
           ibfd, obfd, in_abi, out_abi);
3697
    }
3698
 
3699
  /* Merge Tag_compatibility attributes and any common GNU ones.  */
3700
  _bfd_elf_merge_object_attributes (ibfd, obfd);
3701
 
3702
  return TRUE;
3703
}
3704
 
3705
/* Merge backend specific data from an object file to the output
3706
   object file when linking.  */
3707
 
3708
static bfd_boolean
3709
ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3710
{
3711
  flagword old_flags;
3712
  flagword new_flags;
3713
  bfd_boolean error;
3714
 
3715
  if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3716
    return TRUE;
3717
 
3718
  /* Check if we have the same endianess.  */
3719
  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3720
    return FALSE;
3721
 
3722
  if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3723
    return FALSE;
3724
 
3725
  new_flags = elf_elfheader (ibfd)->e_flags;
3726
  old_flags = elf_elfheader (obfd)->e_flags;
3727
  if (!elf_flags_init (obfd))
3728
    {
3729
      /* First call, no flags set.  */
3730
      elf_flags_init (obfd) = TRUE;
3731
      elf_elfheader (obfd)->e_flags = new_flags;
3732
    }
3733
 
3734
  /* Compatible flags are ok.  */
3735
  else if (new_flags == old_flags)
3736
    ;
3737
 
3738
  /* Incompatible flags.  */
3739
  else
3740
    {
3741
      /* Warn about -mrelocatable mismatch.  Allow -mrelocatable-lib
3742
         to be linked with either.  */
3743
      error = FALSE;
3744
      if ((new_flags & EF_PPC_RELOCATABLE) != 0
3745
          && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3746
        {
3747
          error = TRUE;
3748
          (*_bfd_error_handler)
3749
            (_("%B: compiled with -mrelocatable and linked with "
3750
               "modules compiled normally"), ibfd);
3751
        }
3752
      else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3753
               && (old_flags & EF_PPC_RELOCATABLE) != 0)
3754
        {
3755
          error = TRUE;
3756
          (*_bfd_error_handler)
3757
            (_("%B: compiled normally and linked with "
3758
               "modules compiled with -mrelocatable"), ibfd);
3759
        }
3760
 
3761
      /* The output is -mrelocatable-lib iff both the input files are.  */
3762
      if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3763
        elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3764
 
3765
      /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3766
         but each input file is either -mrelocatable or -mrelocatable-lib.  */
3767
      if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3768
          && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3769
          && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3770
        elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3771
 
3772
      /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3773
         any module uses it.  */
3774
      elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3775
 
3776
      new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3777
      old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3778
 
3779
      /* Warn about any other mismatches.  */
3780
      if (new_flags != old_flags)
3781
        {
3782
          error = TRUE;
3783
          (*_bfd_error_handler)
3784
            (_("%B: uses different e_flags (0x%lx) fields "
3785
               "than previous modules (0x%lx)"),
3786
             ibfd, (long) new_flags, (long) old_flags);
3787
        }
3788
 
3789
      if (error)
3790
        {
3791
          bfd_set_error (bfd_error_bad_value);
3792
          return FALSE;
3793
        }
3794
    }
3795
 
3796
  return TRUE;
3797
}
3798
 
3799
/* Choose which PLT scheme to use, and set .plt flags appropriately.
3800
   Returns -1 on error, 0 for old PLT, 1 for new PLT.  */
3801
int
3802
ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3803
                           struct bfd_link_info *info,
3804
                           enum ppc_elf_plt_type plt_style,
3805
                           int emit_stub_syms)
3806
{
3807
  struct ppc_elf_link_hash_table *htab;
3808
  flagword flags;
3809
 
3810
  htab = ppc_elf_hash_table (info);
3811
 
3812
  if (htab->plt_type == PLT_UNSET)
3813
    {
3814
      if (plt_style == PLT_OLD)
3815
        htab->plt_type = PLT_OLD;
3816
      else
3817
        {
3818
          bfd *ibfd;
3819
          enum ppc_elf_plt_type plt_type = plt_style;
3820
 
3821
          /* Look through the reloc flags left by ppc_elf_check_relocs.
3822
             Use the old style bss plt if a file makes plt calls
3823
             without using the new relocs, and if ld isn't given
3824
             --secure-plt and we never see REL16 relocs.  */
3825
          if (plt_type == PLT_UNSET)
3826
            plt_type = PLT_OLD;
3827
          for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3828
            if (is_ppc_elf (ibfd))
3829
              {
3830
                if (ppc_elf_tdata (ibfd)->has_rel16)
3831
                  plt_type = PLT_NEW;
3832
                else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3833
                  {
3834
                    plt_type = PLT_OLD;
3835
                    htab->old_bfd = ibfd;
3836
                    break;
3837
                  }
3838
              }
3839
          htab->plt_type = plt_type;
3840
        }
3841
    }
3842
  if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3843
    info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3844
 
3845
  htab->emit_stub_syms = emit_stub_syms;
3846
 
3847
  BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3848
 
3849
  if (htab->plt_type == PLT_NEW)
3850
    {
3851
      flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3852
               | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3853
 
3854
      /* The new PLT is a loaded section.  */
3855
      if (htab->plt != NULL
3856
          && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3857
        return -1;
3858
 
3859
      /* The new GOT is not executable.  */
3860
      if (htab->got != NULL
3861
          && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3862
        return -1;
3863
    }
3864
  else
3865
    {
3866
      /* Stop an unused .glink section from affecting .text alignment.  */
3867
      if (htab->glink != NULL
3868
          && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3869
        return -1;
3870
    }
3871
  return htab->plt_type == PLT_NEW;
3872
}
3873
 
3874
/* Return the section that should be marked against GC for a given
3875
   relocation.  */
3876
 
3877
static asection *
3878
ppc_elf_gc_mark_hook (asection *sec,
3879
                      struct bfd_link_info *info,
3880
                      Elf_Internal_Rela *rel,
3881
                      struct elf_link_hash_entry *h,
3882
                      Elf_Internal_Sym *sym)
3883
{
3884
  if (h != NULL)
3885
    switch (ELF32_R_TYPE (rel->r_info))
3886
      {
3887
      case R_PPC_GNU_VTINHERIT:
3888
      case R_PPC_GNU_VTENTRY:
3889
        return NULL;
3890
      }
3891
 
3892
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3893
}
3894
 
3895
/* Update the got, plt and dynamic reloc reference counts for the
3896
   section being removed.  */
3897
 
3898
static bfd_boolean
3899
ppc_elf_gc_sweep_hook (bfd *abfd,
3900
                       struct bfd_link_info *info,
3901
                       asection *sec,
3902
                       const Elf_Internal_Rela *relocs)
3903
{
3904
  struct ppc_elf_link_hash_table *htab;
3905
  Elf_Internal_Shdr *symtab_hdr;
3906
  struct elf_link_hash_entry **sym_hashes;
3907
  bfd_signed_vma *local_got_refcounts;
3908
  const Elf_Internal_Rela *rel, *relend;
3909
  asection *got2;
3910
 
3911
  if (info->relocatable)
3912
    return TRUE;
3913
 
3914
  if ((sec->flags & SEC_ALLOC) == 0)
3915
    return TRUE;
3916
 
3917
  elf_section_data (sec)->local_dynrel = NULL;
3918
 
3919
  htab = ppc_elf_hash_table (info);
3920
  symtab_hdr = &elf_symtab_hdr (abfd);
3921
  sym_hashes = elf_sym_hashes (abfd);
3922
  local_got_refcounts = elf_local_got_refcounts (abfd);
3923
  got2 = bfd_get_section_by_name (abfd, ".got2");
3924
 
3925
  relend = relocs + sec->reloc_count;
3926
  for (rel = relocs; rel < relend; rel++)
3927
    {
3928
      unsigned long r_symndx;
3929
      enum elf_ppc_reloc_type r_type;
3930
      struct elf_link_hash_entry *h = NULL;
3931
 
3932
      r_symndx = ELF32_R_SYM (rel->r_info);
3933
      if (r_symndx >= symtab_hdr->sh_info)
3934
        {
3935
          struct ppc_elf_dyn_relocs **pp, *p;
3936
          struct ppc_elf_link_hash_entry *eh;
3937
 
3938
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3939
          while (h->root.type == bfd_link_hash_indirect
3940
                 || h->root.type == bfd_link_hash_warning)
3941
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
3942
          eh = (struct ppc_elf_link_hash_entry *) h;
3943
 
3944
          for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3945
            if (p->sec == sec)
3946
              {
3947
                /* Everything must go for SEC.  */
3948
                *pp = p->next;
3949
                break;
3950
              }
3951
        }
3952
 
3953
      r_type = ELF32_R_TYPE (rel->r_info);
3954
      switch (r_type)
3955
        {
3956
        case R_PPC_GOT_TLSLD16:
3957
        case R_PPC_GOT_TLSLD16_LO:
3958
        case R_PPC_GOT_TLSLD16_HI:
3959
        case R_PPC_GOT_TLSLD16_HA:
3960
        case R_PPC_GOT_TLSGD16:
3961
        case R_PPC_GOT_TLSGD16_LO:
3962
        case R_PPC_GOT_TLSGD16_HI:
3963
        case R_PPC_GOT_TLSGD16_HA:
3964
        case R_PPC_GOT_TPREL16:
3965
        case R_PPC_GOT_TPREL16_LO:
3966
        case R_PPC_GOT_TPREL16_HI:
3967
        case R_PPC_GOT_TPREL16_HA:
3968
        case R_PPC_GOT_DTPREL16:
3969
        case R_PPC_GOT_DTPREL16_LO:
3970
        case R_PPC_GOT_DTPREL16_HI:
3971
        case R_PPC_GOT_DTPREL16_HA:
3972
        case R_PPC_GOT16:
3973
        case R_PPC_GOT16_LO:
3974
        case R_PPC_GOT16_HI:
3975
        case R_PPC_GOT16_HA:
3976
          if (h != NULL)
3977
            {
3978
              if (h->got.refcount > 0)
3979
                h->got.refcount--;
3980
            }
3981
          else if (local_got_refcounts != NULL)
3982
            {
3983
              if (local_got_refcounts[r_symndx] > 0)
3984
                local_got_refcounts[r_symndx]--;
3985
            }
3986
          break;
3987
 
3988
        case R_PPC_REL24:
3989
        case R_PPC_REL14:
3990
        case R_PPC_REL14_BRTAKEN:
3991
        case R_PPC_REL14_BRNTAKEN:
3992
        case R_PPC_REL32:
3993
          if (h == NULL || h == htab->elf.hgot)
3994
            break;
3995
          /* Fall thru */
3996
 
3997
        case R_PPC_ADDR32:
3998
        case R_PPC_ADDR24:
3999
        case R_PPC_ADDR16:
4000
        case R_PPC_ADDR16_LO:
4001
        case R_PPC_ADDR16_HI:
4002
        case R_PPC_ADDR16_HA:
4003
        case R_PPC_ADDR14:
4004
        case R_PPC_ADDR14_BRTAKEN:
4005
        case R_PPC_ADDR14_BRNTAKEN:
4006
        case R_PPC_UADDR32:
4007
        case R_PPC_UADDR16:
4008
          if (info->shared)
4009
            break;
4010
 
4011
        case R_PPC_PLT32:
4012
        case R_PPC_PLTREL24:
4013
        case R_PPC_PLTREL32:
4014
        case R_PPC_PLT16_LO:
4015
        case R_PPC_PLT16_HI:
4016
        case R_PPC_PLT16_HA:
4017
          if (h != NULL)
4018
            {
4019
              bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4020
              struct plt_entry *ent = find_plt_ent (h, got2, addend);
4021
              if (ent->plt.refcount > 0)
4022
                ent->plt.refcount -= 1;
4023
            }
4024
          break;
4025
 
4026
        default:
4027
          break;
4028
        }
4029
    }
4030
  return TRUE;
4031
}
4032
 
4033
/* Set htab->tls_get_addr and call the generic ELF tls_setup function.  */
4034
 
4035
asection *
4036
ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4037
{
4038
  struct ppc_elf_link_hash_table *htab;
4039
 
4040
  htab = ppc_elf_hash_table (info);
4041
  if (htab->plt_type == PLT_NEW
4042
      && htab->plt != NULL
4043
      && htab->plt->output_section != NULL)
4044
    {
4045
      elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4046
      elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4047
    }
4048
 
4049
  htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4050
                                             FALSE, FALSE, TRUE);
4051
  return _bfd_elf_tls_setup (obfd, info);
4052
}
4053
 
4054
/* Run through all the TLS relocs looking for optimization
4055
   opportunities.  */
4056
 
4057
bfd_boolean
4058
ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4059
                      struct bfd_link_info *info)
4060
{
4061
  bfd *ibfd;
4062
  asection *sec;
4063
  struct ppc_elf_link_hash_table *htab;
4064
  int pass;
4065
 
4066
  if (info->relocatable || info->shared)
4067
    return TRUE;
4068
 
4069
  htab = ppc_elf_hash_table (info);
4070
  /* Make two passes through the relocs.  First time check that tls
4071
     relocs involved in setting up a tls_get_addr call are indeed
4072
     followed by such a call.  If they are not, exclude them from
4073
     the optimizations done on the second pass.  */
4074
  for (pass = 0; pass < 2; ++pass)
4075
    for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4076
      {
4077
        Elf_Internal_Sym *locsyms = NULL;
4078
        Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4079
 
4080
        for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4081
          if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4082
            {
4083
              Elf_Internal_Rela *relstart, *rel, *relend;
4084
 
4085
              /* Read the relocations.  */
4086
              relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4087
                                                    info->keep_memory);
4088
              if (relstart == NULL)
4089
                return FALSE;
4090
 
4091
              relend = relstart + sec->reloc_count;
4092
              for (rel = relstart; rel < relend; rel++)
4093
                {
4094
                  enum elf_ppc_reloc_type r_type;
4095
                  unsigned long r_symndx;
4096
                  struct elf_link_hash_entry *h = NULL;
4097
                  char *tls_mask;
4098
                  char tls_set, tls_clear;
4099
                  bfd_boolean is_local;
4100
                  int expecting_tls_get_addr;
4101
                  bfd_signed_vma *got_count;
4102
 
4103
                  r_symndx = ELF32_R_SYM (rel->r_info);
4104
                  if (r_symndx >= symtab_hdr->sh_info)
4105
                    {
4106
                      struct elf_link_hash_entry **sym_hashes;
4107
 
4108
                      sym_hashes = elf_sym_hashes (ibfd);
4109
                      h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4110
                      while (h->root.type == bfd_link_hash_indirect
4111
                             || h->root.type == bfd_link_hash_warning)
4112
                        h = (struct elf_link_hash_entry *) h->root.u.i.link;
4113
                    }
4114
 
4115
                  expecting_tls_get_addr = 0;
4116
                  is_local = FALSE;
4117
                  if (h == NULL
4118
                      || !h->def_dynamic)
4119
                    is_local = TRUE;
4120
 
4121
                  r_type = ELF32_R_TYPE (rel->r_info);
4122
                  switch (r_type)
4123
                    {
4124
                    case R_PPC_GOT_TLSLD16:
4125
                    case R_PPC_GOT_TLSLD16_LO:
4126
                      expecting_tls_get_addr = 1;
4127
                      /* Fall thru */
4128
 
4129
                    case R_PPC_GOT_TLSLD16_HI:
4130
                    case R_PPC_GOT_TLSLD16_HA:
4131
                      /* These relocs should never be against a symbol
4132
                         defined in a shared lib.  Leave them alone if
4133
                         that turns out to be the case.  */
4134
                      if (!is_local)
4135
                        continue;
4136
 
4137
                      /* LD -> LE */
4138
                      tls_set = 0;
4139
                      tls_clear = TLS_LD;
4140
                      break;
4141
 
4142
                    case R_PPC_GOT_TLSGD16:
4143
                    case R_PPC_GOT_TLSGD16_LO:
4144
                      expecting_tls_get_addr = 1;
4145
                      /* Fall thru */
4146
 
4147
                    case R_PPC_GOT_TLSGD16_HI:
4148
                    case R_PPC_GOT_TLSGD16_HA:
4149
                      if (is_local)
4150
                        /* GD -> LE */
4151
                        tls_set = 0;
4152
                      else
4153
                        /* GD -> IE */
4154
                        tls_set = TLS_TLS | TLS_TPRELGD;
4155
                      tls_clear = TLS_GD;
4156
                      break;
4157
 
4158
                    case R_PPC_GOT_TPREL16:
4159
                    case R_PPC_GOT_TPREL16_LO:
4160
                    case R_PPC_GOT_TPREL16_HI:
4161
                    case R_PPC_GOT_TPREL16_HA:
4162
                      if (is_local)
4163
                        {
4164
                          /* IE -> LE */
4165
                          tls_set = 0;
4166
                          tls_clear = TLS_TPREL;
4167
                          break;
4168
                        }
4169
                      else
4170
                        continue;
4171
 
4172
                    default:
4173
                      continue;
4174
                    }
4175
 
4176
                  if (pass == 0)
4177
                    {
4178
                      if (!expecting_tls_get_addr)
4179
                        continue;
4180
 
4181
                      if (rel + 1 < relend)
4182
                        {
4183
                          enum elf_ppc_reloc_type r_type2;
4184
                          unsigned long r_symndx2;
4185
                          struct elf_link_hash_entry *h2;
4186
 
4187
                          /* The next instruction should be a call to
4188
                             __tls_get_addr.  Peek at the reloc to be sure.  */
4189
                          r_type2 = ELF32_R_TYPE (rel[1].r_info);
4190
                          r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4191
                          if (r_symndx2 >= symtab_hdr->sh_info
4192
                              && (r_type2 == R_PPC_REL14
4193
                                  || r_type2 == R_PPC_REL14_BRTAKEN
4194
                                  || r_type2 == R_PPC_REL14_BRNTAKEN
4195
                                  || r_type2 == R_PPC_REL24
4196
                                  || r_type2 == R_PPC_PLTREL24))
4197
                            {
4198
                              struct elf_link_hash_entry **sym_hashes;
4199
 
4200
                              sym_hashes = elf_sym_hashes (ibfd);
4201
                              h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4202
                              while (h2->root.type == bfd_link_hash_indirect
4203
                                     || h2->root.type == bfd_link_hash_warning)
4204
                                h2 = ((struct elf_link_hash_entry *)
4205
                                      h2->root.u.i.link);
4206
                              if (h2 == htab->tls_get_addr)
4207
                                continue;
4208
                            }
4209
                        }
4210
 
4211
                      /* Uh oh, we didn't find the expected call.  We
4212
                         could just mark this symbol to exclude it
4213
                         from tls optimization but it's safer to skip
4214
                         the entire section.  */
4215
                      sec->has_tls_reloc = 0;
4216
                      break;
4217
                    }
4218
 
4219
                  if (h != NULL)
4220
                    {
4221
                      tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4222
                      got_count = &h->got.refcount;
4223
                    }
4224
                  else
4225
                    {
4226
                      Elf_Internal_Sym *sym;
4227
                      bfd_signed_vma *lgot_refs;
4228
                      char *lgot_masks;
4229
 
4230
                      if (locsyms == NULL)
4231
                        {
4232
                          locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4233
                          if (locsyms == NULL)
4234
                            locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4235
                                                            symtab_hdr->sh_info,
4236
                                                            0, NULL, NULL, NULL);
4237
                          if (locsyms == NULL)
4238
                            {
4239
                              if (elf_section_data (sec)->relocs != relstart)
4240
                                free (relstart);
4241
                              return FALSE;
4242
                            }
4243
                        }
4244
                      sym = locsyms + r_symndx;
4245
                      lgot_refs = elf_local_got_refcounts (ibfd);
4246
                      if (lgot_refs == NULL)
4247
                        abort ();
4248
                      lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4249
                      tls_mask = &lgot_masks[r_symndx];
4250
                      got_count = &lgot_refs[r_symndx];
4251
                    }
4252
 
4253
                  if (tls_set == 0)
4254
                    {
4255
                      /* We managed to get rid of a got entry.  */
4256
                      if (*got_count > 0)
4257
                        *got_count -= 1;
4258
                    }
4259
 
4260
                  if (expecting_tls_get_addr)
4261
                    {
4262
                      struct plt_entry *ent;
4263
 
4264
                      ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4265
                      if (ent != NULL && ent->plt.refcount > 0)
4266
                        ent->plt.refcount -= 1;
4267
                    }
4268
 
4269
                  *tls_mask |= tls_set;
4270
                  *tls_mask &= ~tls_clear;
4271
                }
4272
 
4273
              if (elf_section_data (sec)->relocs != relstart)
4274
                free (relstart);
4275
            }
4276
 
4277
        if (locsyms != NULL
4278
            && (symtab_hdr->contents != (unsigned char *) locsyms))
4279
          {
4280
            if (!info->keep_memory)
4281
              free (locsyms);
4282
            else
4283
              symtab_hdr->contents = (unsigned char *) locsyms;
4284
          }
4285
      }
4286
  return TRUE;
4287
}
4288
 
4289
/* Return true if we have dynamic relocs that apply to read-only sections.  */
4290
 
4291
static bfd_boolean
4292
readonly_dynrelocs (struct elf_link_hash_entry *h)
4293
{
4294
  struct ppc_elf_dyn_relocs *p;
4295
 
4296
  for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4297
    {
4298
      asection *s = p->sec->output_section;
4299
 
4300
      if (s != NULL
4301
          && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4302
              == (SEC_READONLY | SEC_ALLOC)))
4303
        return TRUE;
4304
    }
4305
  return FALSE;
4306
}
4307
 
4308
/* Adjust a symbol defined by a dynamic object and referenced by a
4309
   regular object.  The current definition is in some section of the
4310
   dynamic object, but we're not including those sections.  We have to
4311
   change the definition to something the rest of the link can
4312
   understand.  */
4313
 
4314
static bfd_boolean
4315
ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4316
                               struct elf_link_hash_entry *h)
4317
{
4318
  struct ppc_elf_link_hash_table *htab;
4319
  asection *s;
4320
 
4321
#ifdef DEBUG
4322
  fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4323
           h->root.root.string);
4324
#endif
4325
 
4326
  /* Make sure we know what is going on here.  */
4327
  htab = ppc_elf_hash_table (info);
4328
  BFD_ASSERT (htab->elf.dynobj != NULL
4329
              && (h->needs_plt
4330
                  || h->u.weakdef != NULL
4331
                  || (h->def_dynamic
4332
                      && h->ref_regular
4333
                      && !h->def_regular)));
4334
 
4335
  /* Deal with function syms.  */
4336
  if (h->type == STT_FUNC
4337
      || h->needs_plt)
4338
    {
4339
      /* Clear procedure linkage table information for any symbol that
4340
         won't need a .plt entry.  */
4341
      struct plt_entry *ent;
4342
      for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4343
        if (ent->plt.refcount > 0)
4344
          break;
4345
      if (ent == NULL
4346
          || SYMBOL_CALLS_LOCAL (info, h)
4347
          || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4348
              && h->root.type == bfd_link_hash_undefweak))
4349
        {
4350
          /* A PLT entry is not required/allowed when:
4351
 
4352
             1. We are not using ld.so; because then the PLT entry
4353
             can't be set up, so we can't use one.  In this case,
4354
             ppc_elf_adjust_dynamic_symbol won't even be called.
4355
 
4356
             2. GC has rendered the entry unused.
4357
 
4358
             3. We know for certain that a call to this symbol
4359
             will go to this object, or will remain undefined.  */
4360
          h->plt.plist = NULL;
4361
          h->needs_plt = 0;
4362
        }
4363
      else
4364
        {
4365
          /* After adjust_dynamic_symbol, non_got_ref set means that
4366
             dyn_relocs for this symbol should be discarded.
4367
             If we get here we know we are making a PLT entry for this
4368
             symbol, and in an executable we'd normally resolve
4369
             relocations against this symbol to the PLT entry.  Allow
4370
             dynamic relocs if the reference is weak, and the dynamic
4371
             relocs will not cause text relocation.  */
4372
          if (!h->ref_regular_nonweak
4373
              && h->non_got_ref
4374
              && !htab->is_vxworks
4375
              && !ppc_elf_hash_entry (h)->has_sda_refs
4376
              && !readonly_dynrelocs (h))
4377
            h->non_got_ref = 0;
4378
        }
4379
      return TRUE;
4380
    }
4381
  else
4382
    h->plt.plist = NULL;
4383
 
4384
  /* If this is a weak symbol, and there is a real definition, the
4385
     processor independent code will have arranged for us to see the
4386
     real definition first, and we can just use the same value.  */
4387
  if (h->u.weakdef != NULL)
4388
    {
4389
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4390
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
4391
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
4392
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
4393
      if (ELIMINATE_COPY_RELOCS)
4394
        h->non_got_ref = h->u.weakdef->non_got_ref;
4395
      return TRUE;
4396
    }
4397
 
4398
  /* This is a reference to a symbol defined by a dynamic object which
4399
     is not a function.  */
4400
 
4401
  /* If we are creating a shared library, we must presume that the
4402
     only references to the symbol are via the global offset table.
4403
     For such cases we need not do anything here; the relocations will
4404
     be handled correctly by relocate_section.  */
4405
  if (info->shared)
4406
    return TRUE;
4407
 
4408
  /* If there are no references to this symbol that do not use the
4409
     GOT, we don't need to generate a copy reloc.  */
4410
  if (!h->non_got_ref)
4411
    return TRUE;
4412
 
4413
   /* If we didn't find any dynamic relocs in read-only sections, then
4414
      we'll be keeping the dynamic relocs and avoiding the copy reloc.
4415
      We can't do this if there are any small data relocations.  This
4416
      doesn't work on VxWorks, where we can not have dynamic
4417
      relocations (other than copy and jump slot relocations) in an
4418
      executable.  */
4419
  if (ELIMINATE_COPY_RELOCS
4420
      && !ppc_elf_hash_entry (h)->has_sda_refs
4421
      && !htab->is_vxworks
4422
      && !h->def_regular
4423
      && !readonly_dynrelocs (h))
4424
    {
4425
      h->non_got_ref = 0;
4426
      return TRUE;
4427
    }
4428
 
4429
  if (h->size == 0)
4430
    {
4431
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4432
                             h->root.root.string);
4433
      return TRUE;
4434
    }
4435
 
4436
  /* We must allocate the symbol in our .dynbss section, which will
4437
     become part of the .bss section of the executable.  There will be
4438
     an entry for this symbol in the .dynsym section.  The dynamic
4439
     object will contain position independent code, so all references
4440
     from the dynamic object to this symbol will go through the global
4441
     offset table.  The dynamic linker will use the .dynsym entry to
4442
     determine the address it must put in the global offset table, so
4443
     both the dynamic object and the regular object will refer to the
4444
     same memory location for the variable.
4445
 
4446
     Of course, if the symbol is referenced using SDAREL relocs, we
4447
     must instead allocate it in .sbss.  */
4448
 
4449
  if (ppc_elf_hash_entry (h)->has_sda_refs)
4450
    s = htab->dynsbss;
4451
  else
4452
    s = htab->dynbss;
4453
  BFD_ASSERT (s != NULL);
4454
 
4455
  /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4456
     copy the initial value out of the dynamic object and into the
4457
     runtime process image.  We need to remember the offset into the
4458
     .rela.bss section we are going to use.  */
4459
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4460
    {
4461
      asection *srel;
4462
 
4463
      if (ppc_elf_hash_entry (h)->has_sda_refs)
4464
        srel = htab->relsbss;
4465
      else
4466
        srel = htab->relbss;
4467
      BFD_ASSERT (srel != NULL);
4468
      srel->size += sizeof (Elf32_External_Rela);
4469
      h->needs_copy = 1;
4470
    }
4471
 
4472
  return _bfd_elf_adjust_dynamic_copy (h, s);
4473
}
4474
 
4475
/* Generate a symbol to mark plt call stubs.  For non-PIC code the sym is
4476
   xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4477
   specifying the addend on the plt relocation.  For -fpic code, the sym
4478
   is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4479
   xxxxxxxx.got2.plt_pic32.<callee>.  */
4480
 
4481
static bfd_boolean
4482
add_stub_sym (struct plt_entry *ent,
4483
              struct elf_link_hash_entry *h,
4484
              struct bfd_link_info *info)
4485
{
4486
  struct elf_link_hash_entry *sh;
4487
  size_t len1, len2, len3;
4488
  char *name;
4489
  const char *stub;
4490
  struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4491
 
4492
  if (info->shared || info->pie)
4493
    stub = ".plt_pic32.";
4494
  else
4495
    stub = ".plt_call32.";
4496
 
4497
  len1 = strlen (h->root.root.string);
4498
  len2 = strlen (stub);
4499
  len3 = 0;
4500
  if (ent->sec)
4501
    len3 = strlen (ent->sec->name);
4502
  name = bfd_malloc (len1 + len2 + len3 + 9);
4503
  if (name == NULL)
4504
    return FALSE;
4505
  sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4506
  if (ent->sec)
4507
    memcpy (name + 8, ent->sec->name, len3);
4508
  memcpy (name + 8 + len3, stub, len2);
4509
  memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4510
  sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4511
  if (sh == NULL)
4512
    return FALSE;
4513
  if (sh->root.type == bfd_link_hash_new)
4514
    {
4515
      sh->root.type = bfd_link_hash_defined;
4516
      sh->root.u.def.section = htab->glink;
4517
      sh->root.u.def.value = ent->glink_offset;
4518
      sh->ref_regular = 1;
4519
      sh->def_regular = 1;
4520
      sh->ref_regular_nonweak = 1;
4521
      sh->forced_local = 1;
4522
      sh->non_elf = 0;
4523
    }
4524
  return TRUE;
4525
}
4526
 
4527
/* Allocate NEED contiguous space in .got, and return the offset.
4528
   Handles allocation of the got header when crossing 32k.  */
4529
 
4530
static bfd_vma
4531
allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4532
{
4533
  bfd_vma where;
4534
  unsigned int max_before_header;
4535
 
4536
  if (htab->plt_type == PLT_VXWORKS)
4537
    {
4538
      where = htab->got->size;
4539
      htab->got->size += need;
4540
    }
4541
  else
4542
    {
4543
      max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4544
      if (need <= htab->got_gap)
4545
        {
4546
          where = max_before_header - htab->got_gap;
4547
          htab->got_gap -= need;
4548
        }
4549
      else
4550
        {
4551
          if (htab->got->size + need > max_before_header
4552
              && htab->got->size <= max_before_header)
4553
            {
4554
              htab->got_gap = max_before_header - htab->got->size;
4555
              htab->got->size = max_before_header + htab->got_header_size;
4556
            }
4557
          where = htab->got->size;
4558
          htab->got->size += need;
4559
        }
4560
    }
4561
  return where;
4562
}
4563
 
4564
/* Allocate space in associated reloc sections for dynamic relocs.  */
4565
 
4566
static bfd_boolean
4567
allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4568
{
4569
  struct bfd_link_info *info = inf;
4570
  struct ppc_elf_link_hash_entry *eh;
4571
  struct ppc_elf_link_hash_table *htab;
4572
  struct ppc_elf_dyn_relocs *p;
4573
 
4574
  if (h->root.type == bfd_link_hash_indirect)
4575
    return TRUE;
4576
 
4577
  if (h->root.type == bfd_link_hash_warning)
4578
    /* When warning symbols are created, they **replace** the "real"
4579
       entry in the hash table, thus we never get to see the real
4580
       symbol in a hash traversal.  So look at it now.  */
4581
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
4582
 
4583
  htab = ppc_elf_hash_table (info);
4584
  if (htab->elf.dynamic_sections_created)
4585
    {
4586
      struct plt_entry *ent;
4587
      bfd_boolean doneone = FALSE;
4588
      bfd_vma plt_offset = 0, glink_offset = 0;
4589
 
4590
      for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4591
        if (ent->plt.refcount > 0)
4592
          {
4593
            /* Make sure this symbol is output as a dynamic symbol.  */
4594
            if (h->dynindx == -1
4595
                && !h->forced_local)
4596
              {
4597
                if (! bfd_elf_link_record_dynamic_symbol (info, h))
4598
                  return FALSE;
4599
              }
4600
 
4601
            if (info->shared
4602
                || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4603
              {
4604
                asection *s = htab->plt;
4605
 
4606
                if (htab->plt_type == PLT_NEW)
4607
                  {
4608
                    if (!doneone)
4609
                      {
4610
                        plt_offset = s->size;
4611
                        s->size += 4;
4612
                      }
4613
                    ent->plt.offset = plt_offset;
4614
 
4615
                    s = htab->glink;
4616
                    if (!doneone || info->shared || info->pie)
4617
                      {
4618
                        glink_offset = s->size;
4619
                        s->size += GLINK_ENTRY_SIZE;
4620
                      }
4621
                    if (!doneone
4622
                        && !info->shared
4623
                        && h->def_dynamic
4624
                        && !h->def_regular)
4625
                      {
4626
                        h->root.u.def.section = s;
4627
                        h->root.u.def.value = glink_offset;
4628
                      }
4629
                    ent->glink_offset = glink_offset;
4630
 
4631
                    if (htab->emit_stub_syms
4632
                        && !add_stub_sym (ent, h, info))
4633
                      return FALSE;
4634
                  }
4635
                else
4636
                  {
4637
                    if (!doneone)
4638
                      {
4639
                        /* If this is the first .plt entry, make room
4640
                           for the special first entry.  */
4641
                        if (s->size == 0)
4642
                          s->size += htab->plt_initial_entry_size;
4643
 
4644
                        /* The PowerPC PLT is actually composed of two
4645
                           parts, the first part is 2 words (for a load
4646
                           and a jump), and then there is a remaining
4647
                           word available at the end.  */
4648
                        plt_offset = (htab->plt_initial_entry_size
4649
                                      + (htab->plt_slot_size
4650
                                         * ((s->size
4651
                                             - htab->plt_initial_entry_size)
4652
                                            / htab->plt_entry_size)));
4653
 
4654
                        /* If this symbol is not defined in a regular
4655
                           file, and we are not generating a shared
4656
                           library, then set the symbol to this location
4657
                           in the .plt.  This is required to make
4658
                           function pointers compare as equal between
4659
                           the normal executable and the shared library.  */
4660
                        if (! info->shared
4661
                            && h->def_dynamic
4662
                            && !h->def_regular)
4663
                          {
4664
                            h->root.u.def.section = s;
4665
                            h->root.u.def.value = plt_offset;
4666
                          }
4667
 
4668
                        /* Make room for this entry.  */
4669
                        s->size += htab->plt_entry_size;
4670
                        /* After the 8192nd entry, room for two entries
4671
                           is allocated.  */
4672
                        if (htab->plt_type == PLT_OLD
4673
                            && (s->size - htab->plt_initial_entry_size)
4674
                                / htab->plt_entry_size
4675
                               > PLT_NUM_SINGLE_ENTRIES)
4676
                          s->size += htab->plt_entry_size;
4677
                      }
4678
                    ent->plt.offset = plt_offset;
4679
                  }
4680
 
4681
                /* We also need to make an entry in the .rela.plt section.  */
4682
                if (!doneone)
4683
                  {
4684
                    htab->relplt->size += sizeof (Elf32_External_Rela);
4685
 
4686
                    if (htab->plt_type == PLT_VXWORKS)
4687
                      {
4688
                        /* Allocate space for the unloaded relocations.  */
4689
                        if (!info->shared)
4690
                          {
4691
                            if (ent->plt.offset
4692
                                == (bfd_vma) htab->plt_initial_entry_size)
4693
                              {
4694
                                htab->srelplt2->size
4695
                                  += sizeof (Elf32_External_Rela)
4696
                                      * VXWORKS_PLTRESOLVE_RELOCS;
4697
                              }
4698
 
4699
                            htab->srelplt2->size
4700
                              += sizeof (Elf32_External_Rela)
4701
                                  * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4702
                          }
4703
 
4704
                        /* Every PLT entry has an associated GOT entry in
4705
                           .got.plt.  */
4706
                        htab->sgotplt->size += 4;
4707
                      }
4708
                    doneone = TRUE;
4709
                  }
4710
              }
4711
            else
4712
              ent->plt.offset = (bfd_vma) -1;
4713
          }
4714
        else
4715
          ent->plt.offset = (bfd_vma) -1;
4716
 
4717
      if (!doneone)
4718
        {
4719
          h->plt.plist = NULL;
4720
          h->needs_plt = 0;
4721
        }
4722
    }
4723
  else
4724
    {
4725
      h->plt.plist = NULL;
4726
      h->needs_plt = 0;
4727
    }
4728
 
4729
  eh = (struct ppc_elf_link_hash_entry *) h;
4730
  if (eh->elf.got.refcount > 0)
4731
    {
4732
      /* Make sure this symbol is output as a dynamic symbol.  */
4733
      if (eh->elf.dynindx == -1
4734
          && !eh->elf.forced_local)
4735
        {
4736
          if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4737
            return FALSE;
4738
        }
4739
 
4740
      if (eh->tls_mask == (TLS_TLS | TLS_LD)
4741
          && !eh->elf.def_dynamic)
4742
        {
4743
          /* If just an LD reloc, we'll just use htab->tlsld_got.offset.  */
4744
          htab->tlsld_got.refcount += 1;
4745
          eh->elf.got.offset = (bfd_vma) -1;
4746
        }
4747
      else
4748
        {
4749
          bfd_boolean dyn;
4750
          unsigned int need = 0;
4751
          if ((eh->tls_mask & TLS_TLS) != 0)
4752
            {
4753
              if ((eh->tls_mask & TLS_LD) != 0)
4754
                need += 8;
4755
              if ((eh->tls_mask & TLS_GD) != 0)
4756
                need += 8;
4757
              if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4758
                need += 4;
4759
              if ((eh->tls_mask & TLS_DTPREL) != 0)
4760
                need += 4;
4761
            }
4762
          else
4763
            need += 4;
4764
          eh->elf.got.offset = allocate_got (htab, need);
4765
          dyn = htab->elf.dynamic_sections_created;
4766
          if ((info->shared
4767
               || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4768
              && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4769
                  || eh->elf.root.type != bfd_link_hash_undefweak))
4770
            {
4771
              /* All the entries we allocated need relocs.
4772
                 Except LD only needs one.  */
4773
              if ((eh->tls_mask & TLS_LD) != 0)
4774
                need -= 4;
4775
              htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4776
            }
4777
        }
4778
    }
4779
  else
4780
    eh->elf.got.offset = (bfd_vma) -1;
4781
 
4782
  if (eh->dyn_relocs == NULL)
4783
    return TRUE;
4784
 
4785
  /* In the shared -Bsymbolic case, discard space allocated for
4786
     dynamic pc-relative relocs against symbols which turn out to be
4787
     defined in regular objects.  For the normal shared case, discard
4788
     space for relocs that have become local due to symbol visibility
4789
     changes.  */
4790
 
4791
  if (info->shared)
4792
    {
4793
      /* Relocs that use pc_count are those that appear on a call insn,
4794
         or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4795
         generated via assembly.  We want calls to protected symbols to
4796
         resolve directly to the function rather than going via the plt.
4797
         If people want function pointer comparisons to work as expected
4798
         then they should avoid writing weird assembly.  */
4799
      if (SYMBOL_CALLS_LOCAL (info, h))
4800
        {
4801
          struct ppc_elf_dyn_relocs **pp;
4802
 
4803
          for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4804
            {
4805
              p->count -= p->pc_count;
4806
              p->pc_count = 0;
4807
              if (p->count == 0)
4808
                *pp = p->next;
4809
              else
4810
                pp = &p->next;
4811
            }
4812
        }
4813
 
4814
      if (htab->is_vxworks)
4815
        {
4816
          struct ppc_elf_dyn_relocs **pp;
4817
 
4818
          for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4819
            {
4820
              if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
4821
                *pp = p->next;
4822
              else
4823
                pp = &p->next;
4824
            }
4825
        }
4826
 
4827
      /* Discard relocs on undefined symbols that must be local.  */
4828
      if (eh->dyn_relocs != NULL
4829
          && h->root.type == bfd_link_hash_undefined
4830
          && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
4831
              || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
4832
        eh->dyn_relocs = NULL;
4833
 
4834
      /* Also discard relocs on undefined weak syms with non-default
4835
         visibility.  */
4836
      if (eh->dyn_relocs != NULL
4837
          && h->root.type == bfd_link_hash_undefweak)
4838
        {
4839
          if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4840
            eh->dyn_relocs = NULL;
4841
 
4842
          /* Make sure undefined weak symbols are output as a dynamic
4843
             symbol in PIEs.  */
4844
          else if (h->dynindx == -1
4845
                   && !h->forced_local)
4846
            {
4847
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
4848
                return FALSE;
4849
            }
4850
        }
4851
    }
4852
  else if (ELIMINATE_COPY_RELOCS)
4853
    {
4854
      /* For the non-shared case, discard space for relocs against
4855
         symbols which turn out to need copy relocs or are not
4856
         dynamic.  */
4857
 
4858
      if (!h->non_got_ref
4859
          && !h->def_regular)
4860
        {
4861
          /* Make sure this symbol is output as a dynamic symbol.
4862
             Undefined weak syms won't yet be marked as dynamic.  */
4863
          if (h->dynindx == -1
4864
              && !h->forced_local)
4865
            {
4866
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
4867
                return FALSE;
4868
            }
4869
 
4870
          /* If that succeeded, we know we'll be keeping all the
4871
             relocs.  */
4872
          if (h->dynindx != -1)
4873
            goto keep;
4874
        }
4875
 
4876
      eh->dyn_relocs = NULL;
4877
 
4878
    keep: ;
4879
    }
4880
 
4881
  /* Finally, allocate space.  */
4882
  for (p = eh->dyn_relocs; p != NULL; p = p->next)
4883
    {
4884
      asection *sreloc = elf_section_data (p->sec)->sreloc;
4885
      sreloc->size += p->count * sizeof (Elf32_External_Rela);
4886
    }
4887
 
4888
  return TRUE;
4889
}
4890
 
4891
/* Set DF_TEXTREL if we find any dynamic relocs that apply to
4892
   read-only sections.  */
4893
 
4894
static bfd_boolean
4895
maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
4896
{
4897
  if (h->root.type == bfd_link_hash_indirect)
4898
    return TRUE;
4899
 
4900
  if (h->root.type == bfd_link_hash_warning)
4901
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
4902
 
4903
  if (readonly_dynrelocs (h))
4904
    {
4905
      ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4906
 
4907
      /* Not an error, just cut short the traversal.  */
4908
      return FALSE;
4909
    }
4910
  return TRUE;
4911
}
4912
 
4913
/* Set the sizes of the dynamic sections.  */
4914
 
4915
static bfd_boolean
4916
ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4917
                               struct bfd_link_info *info)
4918
{
4919
  struct ppc_elf_link_hash_table *htab;
4920
  asection *s;
4921
  bfd_boolean relocs;
4922
  bfd *ibfd;
4923
 
4924
#ifdef DEBUG
4925
  fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4926
#endif
4927
 
4928
  htab = ppc_elf_hash_table (info);
4929
  BFD_ASSERT (htab->elf.dynobj != NULL);
4930
 
4931
  if (elf_hash_table (info)->dynamic_sections_created)
4932
    {
4933
      /* Set the contents of the .interp section to the interpreter.  */
4934
      if (info->executable)
4935
        {
4936
          s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4937
          BFD_ASSERT (s != NULL);
4938
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4939
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4940
        }
4941
    }
4942
 
4943
  if (htab->plt_type == PLT_OLD)
4944
    htab->got_header_size = 16;
4945
  else if (htab->plt_type == PLT_NEW)
4946
    htab->got_header_size = 12;
4947
 
4948
  /* Set up .got offsets for local syms, and space for local dynamic
4949
     relocs.  */
4950
  for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4951
    {
4952
      bfd_signed_vma *local_got;
4953
      bfd_signed_vma *end_local_got;
4954
      char *lgot_masks;
4955
      bfd_size_type locsymcount;
4956
      Elf_Internal_Shdr *symtab_hdr;
4957
 
4958
      if (!is_ppc_elf (ibfd))
4959
        continue;
4960
 
4961
      for (s = ibfd->sections; s != NULL; s = s->next)
4962
        {
4963
          struct ppc_elf_dyn_relocs *p;
4964
 
4965
          for (p = ((struct ppc_elf_dyn_relocs *)
4966
                    elf_section_data (s)->local_dynrel);
4967
               p != NULL;
4968
               p = p->next)
4969
            {
4970
              if (!bfd_is_abs_section (p->sec)
4971
                  && bfd_is_abs_section (p->sec->output_section))
4972
                {
4973
                  /* Input section has been discarded, either because
4974
                     it is a copy of a linkonce section or due to
4975
                     linker script /DISCARD/, so we'll be discarding
4976
                     the relocs too.  */
4977
                }
4978
              else if (htab->is_vxworks
4979
                       && strcmp (p->sec->output_section->name,
4980
                                  ".tls_vars") == 0)
4981
                {
4982
                  /* Relocations in vxworks .tls_vars sections are
4983
                     handled specially by the loader.  */
4984
                }
4985
              else if (p->count != 0)
4986
                {
4987
                  elf_section_data (p->sec)->sreloc->size
4988
                    += p->count * sizeof (Elf32_External_Rela);
4989
                  if ((p->sec->output_section->flags
4990
                       & (SEC_READONLY | SEC_ALLOC))
4991
                      == (SEC_READONLY | SEC_ALLOC))
4992
                    info->flags |= DF_TEXTREL;
4993
                }
4994
            }
4995
        }
4996
 
4997
      local_got = elf_local_got_refcounts (ibfd);
4998
      if (!local_got)
4999
        continue;
5000
 
5001
      symtab_hdr = &elf_symtab_hdr (ibfd);
5002
      locsymcount = symtab_hdr->sh_info;
5003
      end_local_got = local_got + locsymcount;
5004
      lgot_masks = (char *) end_local_got;
5005
      for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5006
        if (*local_got > 0)
5007
          {
5008
            if (*lgot_masks == (TLS_TLS | TLS_LD))
5009
              {
5010
                /* If just an LD reloc, we'll just use
5011
                   htab->tlsld_got.offset.  */
5012
                htab->tlsld_got.refcount += 1;
5013
                *local_got = (bfd_vma) -1;
5014
              }
5015
            else
5016
              {
5017
                unsigned int need = 0;
5018
                if ((*lgot_masks & TLS_TLS) != 0)
5019
                  {
5020
                    if ((*lgot_masks & TLS_GD) != 0)
5021
                      need += 8;
5022
                    if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5023
                      need += 4;
5024
                    if ((*lgot_masks & TLS_DTPREL) != 0)
5025
                      need += 4;
5026
                  }
5027
                else
5028
                  need += 4;
5029
                *local_got = allocate_got (htab, need);
5030
                if (info->shared)
5031
                  htab->relgot->size += (need
5032
                                         * (sizeof (Elf32_External_Rela) / 4));
5033
              }
5034
          }
5035
        else
5036
          *local_got = (bfd_vma) -1;
5037
    }
5038
 
5039
  /* Allocate space for global sym dynamic relocs.  */
5040
  elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5041
 
5042
  if (htab->tlsld_got.refcount > 0)
5043
    {
5044
      htab->tlsld_got.offset = allocate_got (htab, 8);
5045
      if (info->shared)
5046
        htab->relgot->size += sizeof (Elf32_External_Rela);
5047
    }
5048
  else
5049
    htab->tlsld_got.offset = (bfd_vma) -1;
5050
 
5051
  if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5052
    {
5053
      unsigned int g_o_t = 32768;
5054
 
5055
      /* If we haven't allocated the header, do so now.  When we get here,
5056
         for old plt/got the got size will be 0 to 32764 (not allocated),
5057
         or 32780 to 65536 (header allocated).  For new plt/got, the
5058
         corresponding ranges are 0 to 32768 and 32780 to 65536.  */
5059
      if (htab->got->size <= 32768)
5060
        {
5061
          g_o_t = htab->got->size;
5062
          if (htab->plt_type == PLT_OLD)
5063
            g_o_t += 4;
5064
          htab->got->size += htab->got_header_size;
5065
        }
5066
 
5067
      htab->elf.hgot->root.u.def.value = g_o_t;
5068
    }
5069
 
5070
  if (htab->glink != NULL && htab->glink->size != 0)
5071
    {
5072
      htab->glink_pltresolve = htab->glink->size;
5073
      /* Space for the branch table.  */
5074
      htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5075
      /* Pad out to align the start of PLTresolve.  */
5076
      htab->glink->size += -htab->glink->size & 15;
5077
      htab->glink->size += GLINK_PLTRESOLVE;
5078
 
5079
      if (htab->emit_stub_syms)
5080
        {
5081
          struct elf_link_hash_entry *sh;
5082
          sh = elf_link_hash_lookup (&htab->elf, "__glink",
5083
                                     TRUE, FALSE, FALSE);
5084
          if (sh == NULL)
5085
            return FALSE;
5086
          if (sh->root.type == bfd_link_hash_new)
5087
            {
5088
              sh->root.type = bfd_link_hash_defined;
5089
              sh->root.u.def.section = htab->glink;
5090
              sh->root.u.def.value = htab->glink_pltresolve;
5091
              sh->ref_regular = 1;
5092
              sh->def_regular = 1;
5093
              sh->ref_regular_nonweak = 1;
5094
              sh->forced_local = 1;
5095
              sh->non_elf = 0;
5096
            }
5097
          sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5098
                                     TRUE, FALSE, FALSE);
5099
          if (sh == NULL)
5100
            return FALSE;
5101
          if (sh->root.type == bfd_link_hash_new)
5102
            {
5103
              sh->root.type = bfd_link_hash_defined;
5104
              sh->root.u.def.section = htab->glink;
5105
              sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5106
              sh->ref_regular = 1;
5107
              sh->def_regular = 1;
5108
              sh->ref_regular_nonweak = 1;
5109
              sh->forced_local = 1;
5110
              sh->non_elf = 0;
5111
            }
5112
        }
5113
    }
5114
 
5115
  /* We've now determined the sizes of the various dynamic sections.
5116
     Allocate memory for them.  */
5117
  relocs = FALSE;
5118
  for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5119
    {
5120
      bfd_boolean strip_section = TRUE;
5121
 
5122
      if ((s->flags & SEC_LINKER_CREATED) == 0)
5123
        continue;
5124
 
5125
      if (s == htab->plt
5126
          || s == htab->glink
5127
          || s == htab->got
5128
          || s == htab->sgotplt
5129
          || s == htab->sbss
5130
          || s == htab->dynbss
5131
          || s == htab->dynsbss)
5132
        {
5133
          /* We'd like to strip these sections if they aren't needed, but if
5134
             we've exported dynamic symbols from them we must leave them.
5135
             It's too late to tell BFD to get rid of the symbols.  */
5136
          if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5137
            strip_section = FALSE;
5138
          /* Strip this section if we don't need it; see the
5139
             comment below.  */
5140
        }
5141
      else if (s == htab->sdata[0].section
5142
               || s == htab->sdata[1].section)
5143
        {
5144
          /* Strip these too.  */
5145
        }
5146
      else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5147
        {
5148
          if (s->size != 0)
5149
            {
5150
              /* Remember whether there are any relocation sections.  */
5151
              relocs = TRUE;
5152
 
5153
              /* We use the reloc_count field as a counter if we need
5154
                 to copy relocs into the output file.  */
5155
              s->reloc_count = 0;
5156
            }
5157
        }
5158
      else
5159
        {
5160
          /* It's not one of our sections, so don't allocate space.  */
5161
          continue;
5162
        }
5163
 
5164
      if (s->size == 0 && strip_section)
5165
        {
5166
          /* If we don't need this section, strip it from the
5167
             output file.  This is mostly to handle .rela.bss and
5168
             .rela.plt.  We must create both sections in
5169
             create_dynamic_sections, because they must be created
5170
             before the linker maps input sections to output
5171
             sections.  The linker does that before
5172
             adjust_dynamic_symbol is called, and it is that
5173
             function which decides whether anything needs to go
5174
             into these sections.  */
5175
          s->flags |= SEC_EXCLUDE;
5176
          continue;
5177
        }
5178
 
5179
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
5180
        continue;
5181
 
5182
      /* Allocate memory for the section contents.  */
5183
      s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5184
      if (s->contents == NULL)
5185
        return FALSE;
5186
    }
5187
 
5188
  if (htab->elf.dynamic_sections_created)
5189
    {
5190
      /* Add some entries to the .dynamic section.  We fill in the
5191
         values later, in ppc_elf_finish_dynamic_sections, but we
5192
         must add the entries now so that we get the correct size for
5193
         the .dynamic section.  The DT_DEBUG entry is filled in by the
5194
         dynamic linker and used by the debugger.  */
5195
#define add_dynamic_entry(TAG, VAL) \
5196
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5197
 
5198
      if (info->executable)
5199
        {
5200
          if (!add_dynamic_entry (DT_DEBUG, 0))
5201
            return FALSE;
5202
        }
5203
 
5204
      if (htab->plt != NULL && htab->plt->size != 0)
5205
        {
5206
          if (!add_dynamic_entry (DT_PLTGOT, 0)
5207
              || !add_dynamic_entry (DT_PLTRELSZ, 0)
5208
              || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5209
              || !add_dynamic_entry (DT_JMPREL, 0))
5210
            return FALSE;
5211
        }
5212
 
5213
      if (htab->glink != NULL && htab->glink->size != 0)
5214
        {
5215
          if (!add_dynamic_entry (DT_PPC_GOT, 0))
5216
            return FALSE;
5217
        }
5218
 
5219
      if (relocs)
5220
        {
5221
          if (!add_dynamic_entry (DT_RELA, 0)
5222
              || !add_dynamic_entry (DT_RELASZ, 0)
5223
              || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5224
            return FALSE;
5225
        }
5226
 
5227
      /* If any dynamic relocs apply to a read-only section, then we
5228
         need a DT_TEXTREL entry.  */
5229
      if ((info->flags & DF_TEXTREL) == 0)
5230
        elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5231
                                info);
5232
 
5233
      if ((info->flags & DF_TEXTREL) != 0)
5234
        {
5235
          if (!add_dynamic_entry (DT_TEXTREL, 0))
5236
            return FALSE;
5237
        }
5238
      if (htab->is_vxworks
5239
          && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5240
        return FALSE;
5241
   }
5242
#undef add_dynamic_entry
5243
 
5244
  return TRUE;
5245
}
5246
 
5247
/* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
5248
 
5249
static bfd_boolean
5250
ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5251
{
5252
  if (h->plt.plist != NULL
5253
      && !h->def_regular
5254
      && (!h->pointer_equality_needed
5255
          || !h->ref_regular_nonweak))
5256
    return FALSE;
5257
 
5258
  return _bfd_elf_hash_symbol (h);
5259
}
5260
 
5261
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5262
 
5263
static const int shared_stub_entry[] =
5264
  {
5265
    0x7c0802a6, /* mflr 0 */
5266
    0x429f0005, /* bcl 20, 31, .Lxxx */
5267
    0x7d6802a6, /* mflr 11 */
5268
    0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5269
    0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5270
    0x7c0803a6, /* mtlr 0 */
5271
    0x7d6903a6, /* mtctr 11 */
5272
    0x4e800420, /* bctr */
5273
  };
5274
 
5275
static const int stub_entry[] =
5276
  {
5277
    0x3d600000, /* lis 11,xxx@ha */
5278
    0x396b0000, /* addi 11,11,xxx@l */
5279
    0x7d6903a6, /* mtctr 11 */
5280
    0x4e800420, /* bctr */
5281
  };
5282
 
5283
static bfd_boolean
5284
ppc_elf_relax_section (bfd *abfd,
5285
                       asection *isec,
5286
                       struct bfd_link_info *link_info,
5287
                       bfd_boolean *again)
5288
{
5289
  struct one_fixup
5290
  {
5291
    struct one_fixup *next;
5292
    asection *tsec;
5293
    bfd_vma toff;
5294
    bfd_vma trampoff;
5295
  };
5296
 
5297
  Elf_Internal_Shdr *symtab_hdr;
5298
  bfd_byte *contents = NULL;
5299
  Elf_Internal_Sym *isymbuf = NULL;
5300
  Elf_Internal_Rela *internal_relocs = NULL;
5301
  Elf_Internal_Rela *irel, *irelend;
5302
  struct one_fixup *fixups = NULL;
5303
  bfd_boolean changed;
5304
  struct ppc_elf_link_hash_table *htab;
5305
  bfd_size_type trampoff;
5306
  asection *got2;
5307
 
5308
  *again = FALSE;
5309
 
5310
  /* Nothing to do if there are no relocations, and no need to do
5311
     anything with non-alloc sections.  */
5312
  if ((isec->flags & SEC_ALLOC) == 0
5313
      || (isec->flags & SEC_RELOC) == 0
5314
      || isec->reloc_count == 0)
5315
    return TRUE;
5316
 
5317
  trampoff = (isec->size + 3) & (bfd_vma) -4;
5318
  /* Space for a branch around any trampolines.  */
5319
  trampoff += 4;
5320
 
5321
  symtab_hdr = &elf_symtab_hdr (abfd);
5322
 
5323
  /* Get a copy of the native relocations.  */
5324
  internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5325
                                               link_info->keep_memory);
5326
  if (internal_relocs == NULL)
5327
    goto error_return;
5328
 
5329
  htab = ppc_elf_hash_table (link_info);
5330
  got2 = bfd_get_section_by_name (abfd, ".got2");
5331
 
5332
  irelend = internal_relocs + isec->reloc_count;
5333
  for (irel = internal_relocs; irel < irelend; irel++)
5334
    {
5335
      unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5336
      bfd_vma symaddr, reladdr, toff, roff;
5337
      asection *tsec;
5338
      struct one_fixup *f;
5339
      size_t insn_offset = 0;
5340
      bfd_vma max_branch_offset, val;
5341
      bfd_byte *hit_addr;
5342
      unsigned long t0;
5343
      unsigned char sym_type;
5344
 
5345
      switch (r_type)
5346
        {
5347
        case R_PPC_REL24:
5348
        case R_PPC_LOCAL24PC:
5349
        case R_PPC_PLTREL24:
5350
          max_branch_offset = 1 << 25;
5351
          break;
5352
 
5353
        case R_PPC_REL14:
5354
        case R_PPC_REL14_BRTAKEN:
5355
        case R_PPC_REL14_BRNTAKEN:
5356
          max_branch_offset = 1 << 15;
5357
          break;
5358
 
5359
        default:
5360
          continue;
5361
        }
5362
 
5363
      /* Get the value of the symbol referred to by the reloc.  */
5364
      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5365
        {
5366
          /* A local symbol.  */
5367
          Elf_Internal_Sym *isym;
5368
 
5369
          /* Read this BFD's local symbols.  */
5370
          if (isymbuf == NULL)
5371
            {
5372
              isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5373
              if (isymbuf == NULL)
5374
                isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5375
                                                symtab_hdr->sh_info, 0,
5376
                                                NULL, NULL, NULL);
5377
              if (isymbuf == 0)
5378
                goto error_return;
5379
            }
5380
          isym = isymbuf + ELF32_R_SYM (irel->r_info);
5381
          if (isym->st_shndx == SHN_UNDEF)
5382
            continue;   /* We can't do anything with undefined symbols.  */
5383
          else if (isym->st_shndx == SHN_ABS)
5384
            tsec = bfd_abs_section_ptr;
5385
          else if (isym->st_shndx == SHN_COMMON)
5386
            tsec = bfd_com_section_ptr;
5387
          else
5388
            tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5389
 
5390
          toff = isym->st_value;
5391
          sym_type = ELF_ST_TYPE (isym->st_info);
5392
        }
5393
      else
5394
        {
5395
          /* Global symbol handling.  */
5396
          unsigned long indx;
5397
          struct elf_link_hash_entry *h;
5398
 
5399
          indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5400
          h = elf_sym_hashes (abfd)[indx];
5401
 
5402
          while (h->root.type == bfd_link_hash_indirect
5403
                 || h->root.type == bfd_link_hash_warning)
5404
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
5405
 
5406
          tsec = NULL;
5407
          toff = 0;
5408
          if (r_type == R_PPC_PLTREL24
5409
              && htab->plt != NULL)
5410
            {
5411
              struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5412
 
5413
              if (ent != NULL)
5414
                {
5415
                  if (htab->plt_type == PLT_NEW)
5416
                    {
5417
                      tsec = htab->glink;
5418
                      toff = ent->glink_offset;
5419
                    }
5420
                  else
5421
                    {
5422
                      tsec = htab->plt;
5423
                      toff = ent->plt.offset;
5424
                    }
5425
                }
5426
            }
5427
          if (tsec != NULL)
5428
            ;
5429
          else if (h->root.type == bfd_link_hash_defined
5430
                   || h->root.type == bfd_link_hash_defweak)
5431
            {
5432
              tsec = h->root.u.def.section;
5433
              toff = h->root.u.def.value;
5434
            }
5435
          else
5436
            continue;
5437
 
5438
          sym_type = h->type;
5439
        }
5440
 
5441
      /* If the branch and target are in the same section, you have
5442
         no hope of adding stubs.  We'll error out later should the
5443
         branch overflow.  */
5444
      if (tsec == isec)
5445
        continue;
5446
 
5447
      /* There probably isn't any reason to handle symbols in
5448
         SEC_MERGE sections;  SEC_MERGE doesn't seem a likely
5449
         attribute for a code section, and we are only looking at
5450
         branches.  However, implement it correctly here as a
5451
         reference for other target relax_section functions.  */
5452
      if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5453
        {
5454
          /* At this stage in linking, no SEC_MERGE symbol has been
5455
             adjusted, so all references to such symbols need to be
5456
             passed through _bfd_merged_section_offset.  (Later, in
5457
             relocate_section, all SEC_MERGE symbols *except* for
5458
             section symbols have been adjusted.)
5459
 
5460
             gas may reduce relocations against symbols in SEC_MERGE
5461
             sections to a relocation against the section symbol when
5462
             the original addend was zero.  When the reloc is against
5463
             a section symbol we should include the addend in the
5464
             offset passed to _bfd_merged_section_offset, since the
5465
             location of interest is the original symbol.  On the
5466
             other hand, an access to "sym+addend" where "sym" is not
5467
             a section symbol should not include the addend;  Such an
5468
             access is presumed to be an offset from "sym";  The
5469
             location of interest is just "sym".  */
5470
          if (sym_type == STT_SECTION)
5471
            toff += irel->r_addend;
5472
 
5473
          toff = _bfd_merged_section_offset (abfd, &tsec,
5474
                                             elf_section_data (tsec)->sec_info,
5475
                                             toff);
5476
 
5477
          if (sym_type != STT_SECTION)
5478
            toff += irel->r_addend;
5479
        }
5480
      /* PLTREL24 addends are special.  */
5481
      else if (r_type != R_PPC_PLTREL24)
5482
        toff += irel->r_addend;
5483
 
5484
      /* Attempted -shared link of non-pic code loses.  */
5485
      if (tsec->output_section == NULL)
5486
        continue;
5487
 
5488
      symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5489
 
5490
      roff = irel->r_offset;
5491
      reladdr = isec->output_section->vma + isec->output_offset + roff;
5492
 
5493
      /* If the branch is in range, no need to do anything.  */
5494
      if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5495
        continue;
5496
 
5497
      /* Look for an existing fixup to this address.  */
5498
      for (f = fixups; f ; f = f->next)
5499
        if (f->tsec == tsec && f->toff == toff)
5500
          break;
5501
 
5502
      if (f == NULL)
5503
        {
5504
          size_t size;
5505
          unsigned long stub_rtype;
5506
 
5507
          val = trampoff - roff;
5508
          if (val >= max_branch_offset)
5509
            /* Oh dear, we can't reach a trampoline.  Don't try to add
5510
               one.  We'll report an error later.  */
5511
            continue;
5512
 
5513
          if (link_info->shared)
5514
            {
5515
              size = 4 * ARRAY_SIZE (shared_stub_entry);
5516
              insn_offset = 12;
5517
              stub_rtype = R_PPC_RELAX32PC;
5518
            }
5519
          else
5520
            {
5521
              size = 4 * ARRAY_SIZE (stub_entry);
5522
              insn_offset = 0;
5523
              stub_rtype = R_PPC_RELAX32;
5524
            }
5525
 
5526
          if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5527
              != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5528
            abort ();
5529
          if (tsec == htab->plt
5530
              || tsec == htab->glink)
5531
            stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5532
 
5533
          /* Hijack the old relocation.  Since we need two
5534
             relocations for this use a "composite" reloc.  */
5535
          irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5536
                                       stub_rtype);
5537
          irel->r_offset = trampoff + insn_offset;
5538
 
5539
          /* Record the fixup so we don't do it again this section.  */
5540
          f = bfd_malloc (sizeof (*f));
5541
          f->next = fixups;
5542
          f->tsec = tsec;
5543
          f->toff = toff;
5544
          f->trampoff = trampoff;
5545
          fixups = f;
5546
 
5547
          trampoff += size;
5548
        }
5549
      else
5550
        {
5551
          val = f->trampoff - roff;
5552
          if (val >= max_branch_offset)
5553
            continue;
5554
 
5555
          /* Nop out the reloc, since we're finalizing things here.  */
5556
          irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5557
        }
5558
 
5559
      /* Get the section contents.  */
5560
      if (contents == NULL)
5561
        {
5562
          /* Get cached copy if it exists.  */
5563
          if (elf_section_data (isec)->this_hdr.contents != NULL)
5564
            contents = elf_section_data (isec)->this_hdr.contents;
5565
          else
5566
            {
5567
              /* Go get them off disk.  */
5568
              if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5569
                goto error_return;
5570
            }
5571
        }
5572
 
5573
      /* Fix up the existing branch to hit the trampoline.  */
5574
      hit_addr = contents + roff;
5575
      switch (r_type)
5576
        {
5577
        case R_PPC_REL24:
5578
        case R_PPC_LOCAL24PC:
5579
        case R_PPC_PLTREL24:
5580
          t0 = bfd_get_32 (abfd, hit_addr);
5581
          t0 &= ~0x3fffffc;
5582
          t0 |= val & 0x3fffffc;
5583
          bfd_put_32 (abfd, t0, hit_addr);
5584
          break;
5585
 
5586
        case R_PPC_REL14:
5587
        case R_PPC_REL14_BRTAKEN:
5588
        case R_PPC_REL14_BRNTAKEN:
5589
          t0 = bfd_get_32 (abfd, hit_addr);
5590
          t0 &= ~0xfffc;
5591
          t0 |= val & 0xfffc;
5592
          bfd_put_32 (abfd, t0, hit_addr);
5593
          break;
5594
        }
5595
    }
5596
 
5597
  /* Write out the trampolines.  */
5598
  changed = fixups != NULL;
5599
  if (fixups != NULL)
5600
    {
5601
      const int *stub;
5602
      bfd_byte *dest;
5603
      bfd_vma val;
5604
      int i, size;
5605
 
5606
      do
5607
        {
5608
          struct one_fixup *f = fixups;
5609
          fixups = fixups->next;
5610
          free (f);
5611
        }
5612
      while (fixups);
5613
 
5614
      contents = bfd_realloc_or_free (contents, trampoff);
5615
      if (contents == NULL)
5616
        goto error_return;
5617
 
5618
      isec->size = (isec->size + 3) & (bfd_vma) -4;
5619
      /* Branch around the trampolines.  */
5620
      val = trampoff - isec->size + 0x48000000;
5621
      dest = contents + isec->size;
5622
      isec->size = trampoff;
5623
      bfd_put_32 (abfd, val, dest);
5624
      dest += 4;
5625
 
5626
      if (link_info->shared)
5627
        {
5628
          stub = shared_stub_entry;
5629
          size = ARRAY_SIZE (shared_stub_entry);
5630
        }
5631
      else
5632
        {
5633
          stub = stub_entry;
5634
          size = ARRAY_SIZE (stub_entry);
5635
        }
5636
 
5637
      i = 0;
5638
      while (dest < contents + trampoff)
5639
        {
5640
          bfd_put_32 (abfd, stub[i], dest);
5641
          i++;
5642
          if (i == size)
5643
            i = 0;
5644
          dest += 4;
5645
        }
5646
      BFD_ASSERT (i == 0);
5647
    }
5648
 
5649
  if (isymbuf != NULL
5650
      && symtab_hdr->contents != (unsigned char *) isymbuf)
5651
    {
5652
      if (! link_info->keep_memory)
5653
        free (isymbuf);
5654
      else
5655
        {
5656
          /* Cache the symbols for elf_link_input_bfd.  */
5657
          symtab_hdr->contents = (unsigned char *) isymbuf;
5658
        }
5659
    }
5660
 
5661
  if (contents != NULL
5662
      && elf_section_data (isec)->this_hdr.contents != contents)
5663
    {
5664
      if (!changed && !link_info->keep_memory)
5665
        free (contents);
5666
      else
5667
        {
5668
          /* Cache the section contents for elf_link_input_bfd.  */
5669
          elf_section_data (isec)->this_hdr.contents = contents;
5670
        }
5671
    }
5672
 
5673
  if (elf_section_data (isec)->relocs != internal_relocs)
5674
    {
5675
      if (!changed)
5676
        free (internal_relocs);
5677
      else
5678
        elf_section_data (isec)->relocs = internal_relocs;
5679
    }
5680
 
5681
  *again = changed;
5682
  return TRUE;
5683
 
5684
 error_return:
5685
  if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5686
    free (isymbuf);
5687
  if (contents != NULL
5688
      && elf_section_data (isec)->this_hdr.contents != contents)
5689
    free (contents);
5690
  if (internal_relocs != NULL
5691
      && elf_section_data (isec)->relocs != internal_relocs)
5692
    free (internal_relocs);
5693
  return FALSE;
5694
}
5695
 
5696
/* What to do when ld finds relocations against symbols defined in
5697
   discarded sections.  */
5698
 
5699
static unsigned int
5700
ppc_elf_action_discarded (asection *sec)
5701
{
5702
  if (strcmp (".fixup", sec->name) == 0)
5703
    return 0;
5704
 
5705
  if (strcmp (".got2", sec->name) == 0)
5706
    return 0;
5707
 
5708
  return _bfd_elf_default_action_discarded (sec);
5709
}
5710
 
5711
/* Fill in the address for a pointer generated in a linker section.  */
5712
 
5713
static bfd_vma
5714
elf_finish_pointer_linker_section (bfd *input_bfd,
5715
                                   elf_linker_section_t *lsect,
5716
                                   struct elf_link_hash_entry *h,
5717
                                   bfd_vma relocation,
5718
                                   const Elf_Internal_Rela *rel)
5719
{
5720
  elf_linker_section_pointers_t *linker_section_ptr;
5721
 
5722
  BFD_ASSERT (lsect != NULL);
5723
 
5724
  if (h != NULL)
5725
    {
5726
      /* Handle global symbol.  */
5727
      struct ppc_elf_link_hash_entry *eh;
5728
 
5729
      eh = (struct ppc_elf_link_hash_entry *) h;
5730
      BFD_ASSERT (eh->elf.def_regular);
5731
      linker_section_ptr = eh->linker_section_pointer;
5732
    }
5733
  else
5734
    {
5735
      /* Handle local symbol.  */
5736
      unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5737
 
5738
      BFD_ASSERT (is_ppc_elf (input_bfd));
5739
      BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5740
      linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5741
    }
5742
 
5743
  linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5744
                                                        rel->r_addend,
5745
                                                        lsect);
5746
  BFD_ASSERT (linker_section_ptr != NULL);
5747
 
5748
  /* Offset will always be a multiple of four, so use the bottom bit
5749
     as a "written" flag.  */
5750
  if ((linker_section_ptr->offset & 1) == 0)
5751
    {
5752
      bfd_put_32 (lsect->section->owner,
5753
                  relocation + linker_section_ptr->addend,
5754
                  lsect->section->contents + linker_section_ptr->offset);
5755
      linker_section_ptr->offset += 1;
5756
    }
5757
 
5758
  relocation = (lsect->section->output_offset
5759
                + linker_section_ptr->offset - 1
5760
                - 0x8000);
5761
 
5762
#ifdef DEBUG
5763
  fprintf (stderr,
5764
           "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5765
           lsect->name, (long) relocation, (long) relocation);
5766
#endif
5767
 
5768
  /* Subtract out the addend, because it will get added back in by the normal
5769
     processing.  */
5770
  return relocation - linker_section_ptr->addend;
5771
}
5772
 
5773
/* The RELOCATE_SECTION function is called by the ELF backend linker
5774
   to handle the relocations for a section.
5775
 
5776
   The relocs are always passed as Rela structures; if the section
5777
   actually uses Rel structures, the r_addend field will always be
5778
   zero.
5779
 
5780
   This function is responsible for adjust the section contents as
5781
   necessary, and (if using Rela relocs and generating a
5782
   relocatable output file) adjusting the reloc addend as
5783
   necessary.
5784
 
5785
   This function does not have to worry about setting the reloc
5786
   address or the reloc symbol index.
5787
 
5788
   LOCAL_SYMS is a pointer to the swapped in local symbols.
5789
 
5790
   LOCAL_SECTIONS is an array giving the section in the input file
5791
   corresponding to the st_shndx field of each local symbol.
5792
 
5793
   The global hash table entry for the global symbols can be found
5794
   via elf_sym_hashes (input_bfd).
5795
 
5796
   When generating relocatable output, this function must handle
5797
   STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
5798
   going to be the section symbol corresponding to the output
5799
   section, which means that the addend must be adjusted
5800
   accordingly.  */
5801
 
5802
static bfd_boolean
5803
ppc_elf_relocate_section (bfd *output_bfd,
5804
                          struct bfd_link_info *info,
5805
                          bfd *input_bfd,
5806
                          asection *input_section,
5807
                          bfd_byte *contents,
5808
                          Elf_Internal_Rela *relocs,
5809
                          Elf_Internal_Sym *local_syms,
5810
                          asection **local_sections)
5811
{
5812
  Elf_Internal_Shdr *symtab_hdr;
5813
  struct elf_link_hash_entry **sym_hashes;
5814
  struct ppc_elf_link_hash_table *htab;
5815
  Elf_Internal_Rela *rel;
5816
  Elf_Internal_Rela *relend;
5817
  Elf_Internal_Rela outrel;
5818
  bfd_byte *loc;
5819
  asection *got2, *sreloc = NULL;
5820
  bfd_vma *local_got_offsets;
5821
  bfd_boolean ret = TRUE;
5822
  bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5823
  bfd_boolean is_vxworks_tls;
5824
 
5825
#ifdef DEBUG
5826
  _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5827
                      "%ld relocations%s",
5828
                      input_bfd, input_section,
5829
                      (long) input_section->reloc_count,
5830
                      (info->relocatable) ? " (relocatable)" : "");
5831
#endif
5832
 
5833
  got2 = bfd_get_section_by_name (input_bfd, ".got2");
5834
 
5835
  /* Initialize howto table if not already done.  */
5836
  if (!ppc_elf_howto_table[R_PPC_ADDR32])
5837
    ppc_elf_howto_init ();
5838
 
5839
  htab = ppc_elf_hash_table (info);
5840
  local_got_offsets = elf_local_got_offsets (input_bfd);
5841
  symtab_hdr = &elf_symtab_hdr (input_bfd);
5842
  sym_hashes = elf_sym_hashes (input_bfd);
5843
  /* We have to handle relocations in vxworks .tls_vars sections
5844
     specially, because the dynamic loader is 'weird'.  */
5845
  is_vxworks_tls = (htab->is_vxworks && info->shared
5846
                    && !strcmp (input_section->output_section->name,
5847
                                ".tls_vars"));
5848
  rel = relocs;
5849
  relend = relocs + input_section->reloc_count;
5850
  for (; rel < relend; rel++)
5851
    {
5852
      enum elf_ppc_reloc_type r_type;
5853
      bfd_vma addend;
5854
      bfd_reloc_status_type r;
5855
      Elf_Internal_Sym *sym;
5856
      asection *sec;
5857
      struct elf_link_hash_entry *h;
5858
      const char *sym_name;
5859
      reloc_howto_type *howto;
5860
      unsigned long r_symndx;
5861
      bfd_vma relocation;
5862
      bfd_vma branch_bit, insn, from;
5863
      bfd_boolean unresolved_reloc;
5864
      bfd_boolean warned;
5865
      unsigned int tls_type, tls_mask, tls_gd;
5866
 
5867
      r_type = ELF32_R_TYPE (rel->r_info);
5868
      sym = NULL;
5869
      sec = NULL;
5870
      h = NULL;
5871
      unresolved_reloc = FALSE;
5872
      warned = FALSE;
5873
      r_symndx = ELF32_R_SYM (rel->r_info);
5874
 
5875
      if (r_symndx < symtab_hdr->sh_info)
5876
        {
5877
          sym = local_syms + r_symndx;
5878
          sec = local_sections[r_symndx];
5879
          sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5880
 
5881
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5882
        }
5883
      else
5884
        {
5885
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5886
                                   r_symndx, symtab_hdr, sym_hashes,
5887
                                   h, sec, relocation,
5888
                                   unresolved_reloc, warned);
5889
 
5890
          sym_name = h->root.root.string;
5891
        }
5892
 
5893
      if (sec != NULL && elf_discarded_section (sec))
5894
        {
5895
          /* For relocs against symbols from removed linkonce sections,
5896
             or sections discarded by a linker script, we just want the
5897
             section contents zeroed.  Avoid any special processing.  */
5898
          howto = NULL;
5899
          if (r_type < R_PPC_max)
5900
            howto = ppc_elf_howto_table[r_type];
5901
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5902
          rel->r_info = 0;
5903
          rel->r_addend = 0;
5904
          continue;
5905
        }
5906
 
5907
      if (info->relocatable)
5908
        {
5909
          if (got2 != NULL
5910
              && r_type == R_PPC_PLTREL24
5911
              && rel->r_addend >= 32768)
5912
            {
5913
              /* R_PPC_PLTREL24 is rather special.  If non-zero, the
5914
                 addend specifies the GOT pointer offset within .got2.  */
5915
              rel->r_addend += got2->output_offset;
5916
            }
5917
          continue;
5918
        }
5919
 
5920
      /* TLS optimizations.  Replace instruction sequences and relocs
5921
         based on information we collected in tls_optimize.  We edit
5922
         RELOCS so that --emit-relocs will output something sensible
5923
         for the final instruction stream.  */
5924
      tls_mask = 0;
5925
      tls_gd = 0;
5926
      if (IS_PPC_TLS_RELOC (r_type))
5927
        {
5928
          if (h != NULL)
5929
            tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5930
          else if (local_got_offsets != NULL)
5931
            {
5932
              char *lgot_masks;
5933
              lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5934
              tls_mask = lgot_masks[r_symndx];
5935
            }
5936
        }
5937
 
5938
      /* Ensure reloc mapping code below stays sane.  */
5939
      if ((R_PPC_GOT_TLSLD16 & 3)    != (R_PPC_GOT_TLSGD16 & 3)
5940
          || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5941
          || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5942
          || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5943
          || (R_PPC_GOT_TLSLD16 & 3)    != (R_PPC_GOT_TPREL16 & 3)
5944
          || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5945
          || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5946
          || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5947
        abort ();
5948
      switch (r_type)
5949
        {
5950
        default:
5951
          break;
5952
 
5953
        case R_PPC_GOT_TPREL16:
5954
        case R_PPC_GOT_TPREL16_LO:
5955
          if (tls_mask != 0
5956
              && (tls_mask & TLS_TPREL) == 0)
5957
            {
5958
              bfd_vma insn;
5959
              insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5960
              insn &= 31 << 21;
5961
              insn |= 0x3c020000;       /* addis 0,2,0 */
5962
              bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5963
              r_type = R_PPC_TPREL16_HA;
5964
              rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5965
            }
5966
          break;
5967
 
5968
        case R_PPC_TLS:
5969
          if (tls_mask != 0
5970
              && (tls_mask & TLS_TPREL) == 0)
5971
            {
5972
              bfd_vma insn, rtra;
5973
              insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5974
              if ((insn & ((31 << 26) | (31 << 11)))
5975
                  == ((31 << 26) | (2 << 11)))
5976
                rtra = insn & ((1 << 26) - (1 << 16));
5977
              else if ((insn & ((31 << 26) | (31 << 16)))
5978
                       == ((31 << 26) | (2 << 16)))
5979
                rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5980
              else
5981
                abort ();
5982
              if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5983
                /* add -> addi.  */
5984
                insn = 14 << 26;
5985
              else if ((insn & (31 << 1)) == 23 << 1
5986
                       && ((insn & (31 << 6)) < 14 << 6
5987
                           || ((insn & (31 << 6)) >= 16 << 6
5988
                               && (insn & (31 << 6)) < 24 << 6)))
5989
                /* load and store indexed -> dform.  */
5990
                insn = (32 | ((insn >> 6) & 31)) << 26;
5991
              else if ((insn & (31 << 1)) == 21 << 1
5992
                       && (insn & (0x1a << 6)) == 0)
5993
                /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu.  */
5994
                insn = (((58 | ((insn >> 6) & 4)) << 26)
5995
                        | ((insn >> 6) & 1));
5996
              else if ((insn & (31 << 1)) == 21 << 1
5997
                       && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5998
                /* lwax -> lwa.  */
5999
                insn = (58 << 26) | 2;
6000
              else
6001
                abort ();
6002
              insn |= rtra;
6003
              bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6004
              r_type = R_PPC_TPREL16_LO;
6005
              rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6006
 
6007
              /* Was PPC_TLS which sits on insn boundary, now
6008
                 PPC_TPREL16_LO which is at low-order half-word.  */
6009
              rel->r_offset += d_offset;
6010
            }
6011
          break;
6012
 
6013
        case R_PPC_GOT_TLSGD16_HI:
6014
        case R_PPC_GOT_TLSGD16_HA:
6015
          tls_gd = TLS_TPRELGD;
6016
          if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6017
            goto tls_gdld_hi;
6018
          break;
6019
 
6020
        case R_PPC_GOT_TLSLD16_HI:
6021
        case R_PPC_GOT_TLSLD16_HA:
6022
          if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6023
            {
6024
            tls_gdld_hi:
6025
              if ((tls_mask & tls_gd) != 0)
6026
                r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6027
                          + R_PPC_GOT_TPREL16);
6028
              else
6029
                {
6030
                  bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6031
                  rel->r_offset -= d_offset;
6032
                  r_type = R_PPC_NONE;
6033
                }
6034
              rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6035
            }
6036
          break;
6037
 
6038
        case R_PPC_GOT_TLSGD16:
6039
        case R_PPC_GOT_TLSGD16_LO:
6040
          tls_gd = TLS_TPRELGD;
6041
          if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6042
            goto tls_ldgd_opt;
6043
          break;
6044
 
6045
        case R_PPC_GOT_TLSLD16:
6046
        case R_PPC_GOT_TLSLD16_LO:
6047
          if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6048
            {
6049
              bfd_vma insn1, insn2;
6050
              bfd_vma offset;
6051
 
6052
            tls_ldgd_opt:
6053
              offset = rel[1].r_offset;
6054
              insn1 = bfd_get_32 (output_bfd,
6055
                                  contents + rel->r_offset - d_offset);
6056
              if ((tls_mask & tls_gd) != 0)
6057
                {
6058
                  /* IE */
6059
                  insn1 &= (1 << 26) - 1;
6060
                  insn1 |= 32 << 26;    /* lwz */
6061
                  insn2 = 0x7c631214;   /* add 3,3,2 */
6062
                  rel[1].r_info
6063
                    = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6064
                  rel[1].r_addend = 0;
6065
                  r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6066
                            + R_PPC_GOT_TPREL16);
6067
                  rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6068
                }
6069
              else
6070
                {
6071
                  /* LE */
6072
                  insn1 = 0x3c620000;   /* addis 3,2,0 */
6073
                  insn2 = 0x38630000;   /* addi 3,3,0 */
6074
                  if (tls_gd == 0)
6075
                    {
6076
                      /* Was an LD reloc.  */
6077
                      r_symndx = 0;
6078
                      rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6079
                    }
6080
                  r_type = R_PPC_TPREL16_HA;
6081
                  rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6082
                  rel[1].r_info = ELF32_R_INFO (r_symndx,
6083
                                                R_PPC_TPREL16_LO);
6084
                  rel[1].r_offset += d_offset;
6085
                  rel[1].r_addend = rel->r_addend;
6086
                }
6087
              bfd_put_32 (output_bfd, insn1,
6088
                          contents + rel->r_offset - d_offset);
6089
              bfd_put_32 (output_bfd, insn2, contents + offset);
6090
              if (tls_gd == 0)
6091
                {
6092
                  /* We changed the symbol on an LD reloc.  Start over
6093
                     in order to get h, sym, sec etc. right.  */
6094
                  rel--;
6095
                  continue;
6096
                }
6097
            }
6098
          break;
6099
        }
6100
 
6101
      /* Handle other relocations that tweak non-addend part of insn.  */
6102
      branch_bit = 0;
6103
      switch (r_type)
6104
        {
6105
        default:
6106
          break;
6107
 
6108
          /* Branch taken prediction relocations.  */
6109
        case R_PPC_ADDR14_BRTAKEN:
6110
        case R_PPC_REL14_BRTAKEN:
6111
          branch_bit = BRANCH_PREDICT_BIT;
6112
          /* Fall thru */
6113
 
6114
          /* Branch not taken prediction relocations.  */
6115
        case R_PPC_ADDR14_BRNTAKEN:
6116
        case R_PPC_REL14_BRNTAKEN:
6117
          insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6118
          insn &= ~BRANCH_PREDICT_BIT;
6119
          insn |= branch_bit;
6120
 
6121
          from = (rel->r_offset
6122
                  + input_section->output_offset
6123
                  + input_section->output_section->vma);
6124
 
6125
          /* Invert 'y' bit if not the default.  */
6126
          if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6127
            insn ^= BRANCH_PREDICT_BIT;
6128
 
6129
          bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6130
          break;
6131
        }
6132
 
6133
      addend = rel->r_addend;
6134
      tls_type = 0;
6135
      howto = NULL;
6136
      if (r_type < R_PPC_max)
6137
        howto = ppc_elf_howto_table[r_type];
6138
      switch (r_type)
6139
        {
6140
        default:
6141
          (*_bfd_error_handler)
6142
            (_("%B: unknown relocation type %d for symbol %s"),
6143
             input_bfd, (int) r_type, sym_name);
6144
 
6145
          bfd_set_error (bfd_error_bad_value);
6146
          ret = FALSE;
6147
          continue;
6148
 
6149
        case R_PPC_NONE:
6150
        case R_PPC_TLS:
6151
        case R_PPC_EMB_MRKREF:
6152
        case R_PPC_GNU_VTINHERIT:
6153
        case R_PPC_GNU_VTENTRY:
6154
          continue;
6155
 
6156
          /* GOT16 relocations.  Like an ADDR16 using the symbol's
6157
             address in the GOT as relocation value instead of the
6158
             symbol's value itself.  Also, create a GOT entry for the
6159
             symbol and put the symbol value there.  */
6160
        case R_PPC_GOT_TLSGD16:
6161
        case R_PPC_GOT_TLSGD16_LO:
6162
        case R_PPC_GOT_TLSGD16_HI:
6163
        case R_PPC_GOT_TLSGD16_HA:
6164
          tls_type = TLS_TLS | TLS_GD;
6165
          goto dogot;
6166
 
6167
        case R_PPC_GOT_TLSLD16:
6168
        case R_PPC_GOT_TLSLD16_LO:
6169
        case R_PPC_GOT_TLSLD16_HI:
6170
        case R_PPC_GOT_TLSLD16_HA:
6171
          tls_type = TLS_TLS | TLS_LD;
6172
          goto dogot;
6173
 
6174
        case R_PPC_GOT_TPREL16:
6175
        case R_PPC_GOT_TPREL16_LO:
6176
        case R_PPC_GOT_TPREL16_HI:
6177
        case R_PPC_GOT_TPREL16_HA:
6178
          tls_type = TLS_TLS | TLS_TPREL;
6179
          goto dogot;
6180
 
6181
        case R_PPC_GOT_DTPREL16:
6182
        case R_PPC_GOT_DTPREL16_LO:
6183
        case R_PPC_GOT_DTPREL16_HI:
6184
        case R_PPC_GOT_DTPREL16_HA:
6185
          tls_type = TLS_TLS | TLS_DTPREL;
6186
          goto dogot;
6187
 
6188
        case R_PPC_GOT16:
6189
        case R_PPC_GOT16_LO:
6190
        case R_PPC_GOT16_HI:
6191
        case R_PPC_GOT16_HA:
6192
        dogot:
6193
          {
6194
            /* Relocation is to the entry for this symbol in the global
6195
               offset table.  */
6196
            bfd_vma off;
6197
            bfd_vma *offp;
6198
            unsigned long indx;
6199
 
6200
            if (htab->got == NULL)
6201
              abort ();
6202
 
6203
            indx = 0;
6204
            if (tls_type == (TLS_TLS | TLS_LD)
6205
                && (h == NULL
6206
                    || !h->def_dynamic))
6207
              offp = &htab->tlsld_got.offset;
6208
            else if (h != NULL)
6209
              {
6210
                bfd_boolean dyn;
6211
                dyn = htab->elf.dynamic_sections_created;
6212
                if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6213
                    || (info->shared
6214
                        && SYMBOL_REFERENCES_LOCAL (info, h)))
6215
                  /* This is actually a static link, or it is a
6216
                     -Bsymbolic link and the symbol is defined
6217
                     locally, or the symbol was forced to be local
6218
                     because of a version file.  */
6219
                  ;
6220
                else
6221
                  {
6222
                    indx = h->dynindx;
6223
                    unresolved_reloc = FALSE;
6224
                  }
6225
                offp = &h->got.offset;
6226
              }
6227
            else
6228
              {
6229
                if (local_got_offsets == NULL)
6230
                  abort ();
6231
                offp = &local_got_offsets[r_symndx];
6232
              }
6233
 
6234
            /* The offset must always be a multiple of 4.  We use the
6235
               least significant bit to record whether we have already
6236
               processed this entry.  */
6237
            off = *offp;
6238
            if ((off & 1) != 0)
6239
              off &= ~1;
6240
            else
6241
              {
6242
                unsigned int tls_m = (tls_mask
6243
                                      & (TLS_LD | TLS_GD | TLS_DTPREL
6244
                                         | TLS_TPREL | TLS_TPRELGD));
6245
 
6246
                if (offp == &htab->tlsld_got.offset)
6247
                  tls_m = TLS_LD;
6248
                else if (h == NULL
6249
                         || !h->def_dynamic)
6250
                  tls_m &= ~TLS_LD;
6251
 
6252
                /* We might have multiple got entries for this sym.
6253
                   Initialize them all.  */
6254
                do
6255
                  {
6256
                    int tls_ty = 0;
6257
 
6258
                    if ((tls_m & TLS_LD) != 0)
6259
                      {
6260
                        tls_ty = TLS_TLS | TLS_LD;
6261
                        tls_m &= ~TLS_LD;
6262
                      }
6263
                    else if ((tls_m & TLS_GD) != 0)
6264
                      {
6265
                        tls_ty = TLS_TLS | TLS_GD;
6266
                        tls_m &= ~TLS_GD;
6267
                      }
6268
                    else if ((tls_m & TLS_DTPREL) != 0)
6269
                      {
6270
                        tls_ty = TLS_TLS | TLS_DTPREL;
6271
                        tls_m &= ~TLS_DTPREL;
6272
                      }
6273
                    else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6274
                      {
6275
                        tls_ty = TLS_TLS | TLS_TPREL;
6276
                        tls_m = 0;
6277
                      }
6278
 
6279
                    /* Generate relocs for the dynamic linker.  */
6280
                    if ((info->shared || indx != 0)
6281
                        && (h == NULL
6282
                            || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6283
                            || h->root.type != bfd_link_hash_undefweak))
6284
                      {
6285
                        outrel.r_offset = (htab->got->output_section->vma
6286
                                           + htab->got->output_offset
6287
                                           + off);
6288
                        outrel.r_addend = 0;
6289
                        if (tls_ty & (TLS_LD | TLS_GD))
6290
                          {
6291
                            outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6292
                            if (tls_ty == (TLS_TLS | TLS_GD))
6293
                              {
6294
                                loc = htab->relgot->contents;
6295
                                loc += (htab->relgot->reloc_count++
6296
                                        * sizeof (Elf32_External_Rela));
6297
                                bfd_elf32_swap_reloca_out (output_bfd,
6298
                                                           &outrel, loc);
6299
                                outrel.r_offset += 4;
6300
                                outrel.r_info
6301
                                  = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6302
                              }
6303
                          }
6304
                        else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6305
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6306
                        else if (tls_ty == (TLS_TLS | TLS_TPREL))
6307
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6308
                        else if (indx == 0)
6309
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6310
                        else
6311
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6312
                        if (indx == 0)
6313
                          {
6314
                            outrel.r_addend += relocation;
6315
                            if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6316
                              outrel.r_addend -= htab->elf.tls_sec->vma;
6317
                          }
6318
                        loc = htab->relgot->contents;
6319
                        loc += (htab->relgot->reloc_count++
6320
                                * sizeof (Elf32_External_Rela));
6321
                        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6322
                      }
6323
 
6324
                    /* Init the .got section contents if we're not
6325
                       emitting a reloc.  */
6326
                    else
6327
                      {
6328
                        bfd_vma value = relocation;
6329
 
6330
                        if (tls_ty == (TLS_TLS | TLS_LD))
6331
                          value = 1;
6332
                        else if (tls_ty != 0)
6333
                          {
6334
                            value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6335
                            if (tls_ty == (TLS_TLS | TLS_TPREL))
6336
                              value += DTP_OFFSET - TP_OFFSET;
6337
 
6338
                            if (tls_ty == (TLS_TLS | TLS_GD))
6339
                              {
6340
                                bfd_put_32 (output_bfd, value,
6341
                                            htab->got->contents + off + 4);
6342
                                value = 1;
6343
                              }
6344
                          }
6345
                        bfd_put_32 (output_bfd, value,
6346
                                    htab->got->contents + off);
6347
                      }
6348
 
6349
                    off += 4;
6350
                    if (tls_ty & (TLS_LD | TLS_GD))
6351
                      off += 4;
6352
                  }
6353
                while (tls_m != 0);
6354
 
6355
                off = *offp;
6356
                *offp = off | 1;
6357
              }
6358
 
6359
            if (off >= (bfd_vma) -2)
6360
              abort ();
6361
 
6362
            if ((tls_type & TLS_TLS) != 0)
6363
              {
6364
                if (tls_type != (TLS_TLS | TLS_LD))
6365
                  {
6366
                    if ((tls_mask & TLS_LD) != 0
6367
                        && !(h == NULL
6368
                             || !h->def_dynamic))
6369
                      off += 8;
6370
                    if (tls_type != (TLS_TLS | TLS_GD))
6371
                      {
6372
                        if ((tls_mask & TLS_GD) != 0)
6373
                          off += 8;
6374
                        if (tls_type != (TLS_TLS | TLS_DTPREL))
6375
                          {
6376
                            if ((tls_mask & TLS_DTPREL) != 0)
6377
                              off += 4;
6378
                          }
6379
                      }
6380
                  }
6381
              }
6382
 
6383
            relocation = htab->got->output_offset + off;
6384
            relocation -= htab->elf.hgot->root.u.def.value;
6385
 
6386
            /* Addends on got relocations don't make much sense.
6387
               x+off@got is actually x@got+off, and since the got is
6388
               generated by a hash table traversal, the value in the
6389
               got at entry m+n bears little relation to the entry m.  */
6390
            if (addend != 0)
6391
              (*_bfd_error_handler)
6392
                (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6393
                 input_bfd,
6394
                 input_section,
6395
                 (long) rel->r_offset,
6396
                 howto->name,
6397
                 sym_name);
6398
          }
6399
        break;
6400
 
6401
        /* Relocations that need no special processing.  */
6402
        case R_PPC_LOCAL24PC:
6403
          /* It makes no sense to point a local relocation
6404
             at a symbol not in this object.  */
6405
          if (unresolved_reloc)
6406
            {
6407
              if (! (*info->callbacks->undefined_symbol) (info,
6408
                                                          h->root.root.string,
6409
                                                          input_bfd,
6410
                                                          input_section,
6411
                                                          rel->r_offset,
6412
                                                          TRUE))
6413
                return FALSE;
6414
              continue;
6415
            }
6416
          break;
6417
 
6418
        case R_PPC_DTPREL16:
6419
        case R_PPC_DTPREL16_LO:
6420
        case R_PPC_DTPREL16_HI:
6421
        case R_PPC_DTPREL16_HA:
6422
          addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6423
          break;
6424
 
6425
          /* Relocations that may need to be propagated if this is a shared
6426
             object.  */
6427
        case R_PPC_TPREL16:
6428
        case R_PPC_TPREL16_LO:
6429
        case R_PPC_TPREL16_HI:
6430
        case R_PPC_TPREL16_HA:
6431
          addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6432
          /* The TPREL16 relocs shouldn't really be used in shared
6433
             libs as they will result in DT_TEXTREL being set, but
6434
             support them anyway.  */
6435
          goto dodyn;
6436
 
6437
        case R_PPC_TPREL32:
6438
          addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6439
          goto dodyn;
6440
 
6441
        case R_PPC_DTPREL32:
6442
          addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6443
          goto dodyn;
6444
 
6445
        case R_PPC_DTPMOD32:
6446
          relocation = 1;
6447
          addend = 0;
6448
          goto dodyn;
6449
 
6450
        case R_PPC_REL16:
6451
        case R_PPC_REL16_LO:
6452
        case R_PPC_REL16_HI:
6453
        case R_PPC_REL16_HA:
6454
          break;
6455
 
6456
        case R_PPC_REL32:
6457
          if (h == NULL || h == htab->elf.hgot)
6458
            break;
6459
          /* fall through */
6460
 
6461
        case R_PPC_ADDR32:
6462
        case R_PPC_ADDR16:
6463
        case R_PPC_ADDR16_LO:
6464
        case R_PPC_ADDR16_HI:
6465
        case R_PPC_ADDR16_HA:
6466
        case R_PPC_UADDR32:
6467
        case R_PPC_UADDR16:
6468
          goto dodyn;
6469
 
6470
        case R_PPC_REL24:
6471
        case R_PPC_REL14:
6472
        case R_PPC_REL14_BRTAKEN:
6473
        case R_PPC_REL14_BRNTAKEN:
6474
          /* If these relocations are not to a named symbol, they can be
6475
             handled right here, no need to bother the dynamic linker.  */
6476
          if (SYMBOL_CALLS_LOCAL (info, h)
6477
              || h == htab->elf.hgot)
6478
            break;
6479
          /* fall through */
6480
 
6481
        case R_PPC_ADDR24:
6482
        case R_PPC_ADDR14:
6483
        case R_PPC_ADDR14_BRTAKEN:
6484
        case R_PPC_ADDR14_BRNTAKEN:
6485
          if (h != NULL && !info->shared)
6486
            break;
6487
          /* fall through */
6488
 
6489
        dodyn:
6490
          if ((input_section->flags & SEC_ALLOC) == 0
6491
              || is_vxworks_tls)
6492
            break;
6493
 
6494
          if ((info->shared
6495
               && !(h != NULL
6496
                    && ((h->root.type == bfd_link_hash_undefined
6497
                         && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6498
                             || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6499
                        || (h->root.type == bfd_link_hash_undefweak
6500
                            && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6501
               && (MUST_BE_DYN_RELOC (r_type)
6502
                   || !SYMBOL_CALLS_LOCAL (info, h)))
6503
              || (ELIMINATE_COPY_RELOCS
6504
                  && !info->shared
6505
                  && h != NULL
6506
                  && h->dynindx != -1
6507
                  && !h->non_got_ref
6508
                  && !h->def_regular))
6509
            {
6510
              int skip;
6511
 
6512
#ifdef DEBUG
6513
              fprintf (stderr, "ppc_elf_relocate_section needs to "
6514
                       "create relocation for %s\n",
6515
                       (h && h->root.root.string
6516
                        ? h->root.root.string : "<unknown>"));
6517
#endif
6518
 
6519
              /* When generating a shared object, these relocations
6520
                 are copied into the output file to be resolved at run
6521
                 time.  */
6522
              if (sreloc == NULL)
6523
                {
6524
                  const char *name;
6525
 
6526
                  name = (bfd_elf_string_from_elf_section
6527
                          (input_bfd,
6528
                           elf_elfheader (input_bfd)->e_shstrndx,
6529
                           elf_section_data (input_section)->rel_hdr.sh_name));
6530
                  if (name == NULL)
6531
                    return FALSE;
6532
 
6533
                  BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6534
                              && strcmp (bfd_get_section_name (input_bfd,
6535
                                                               input_section),
6536
                                         name + 5) == 0);
6537
 
6538
                  sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6539
                  BFD_ASSERT (sreloc != NULL);
6540
                }
6541
 
6542
              skip = 0;
6543
              outrel.r_offset =
6544
                _bfd_elf_section_offset (output_bfd, info, input_section,
6545
                                         rel->r_offset);
6546
              if (outrel.r_offset == (bfd_vma) -1
6547
                  || outrel.r_offset == (bfd_vma) -2)
6548
                skip = (int) outrel.r_offset;
6549
              outrel.r_offset += (input_section->output_section->vma
6550
                                  + input_section->output_offset);
6551
 
6552
              if (skip)
6553
                memset (&outrel, 0, sizeof outrel);
6554
              else if ((h != NULL
6555
                        && (h->root.type == bfd_link_hash_undefined
6556
                            || h->root.type == bfd_link_hash_undefweak))
6557
                       || !SYMBOL_REFERENCES_LOCAL (info, h))
6558
                {
6559
                  unresolved_reloc = FALSE;
6560
                  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6561
                  outrel.r_addend = rel->r_addend;
6562
                }
6563
              else
6564
                {
6565
                  outrel.r_addend = relocation + rel->r_addend;
6566
 
6567
                  if (r_type == R_PPC_ADDR32)
6568
                    outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6569
                  else
6570
                    {
6571
                      long indx = 0;
6572
 
6573
                      if (bfd_is_abs_section (sec))
6574
                        ;
6575
                      else if (sec == NULL || sec->owner == NULL)
6576
                        {
6577
                          bfd_set_error (bfd_error_bad_value);
6578
                          ret = FALSE;
6579
                        }
6580
                      else
6581
                        {
6582
                          asection *osec;
6583
 
6584
                          /* We are turning this relocation into one
6585
                             against a section symbol.  It would be
6586
                             proper to subtract the symbol's value,
6587
                             osec->vma, from the emitted reloc addend,
6588
                             but ld.so expects buggy relocs.  */
6589
                          osec = sec->output_section;
6590
                          indx = elf_section_data (osec)->dynindx;
6591
                          if (indx == 0)
6592
                            {
6593
                              osec = htab->elf.text_index_section;
6594
                              indx = elf_section_data (osec)->dynindx;
6595
                            }
6596
                          BFD_ASSERT (indx != 0);
6597
#ifdef DEBUG
6598
                          if (indx == 0)
6599
                            printf ("indx=%ld section=%s flags=%08x name=%s\n",
6600
                                    indx, osec->name, osec->flags,
6601
                                    h->root.root.string);
6602
#endif
6603
                        }
6604
 
6605
                      outrel.r_info = ELF32_R_INFO (indx, r_type);
6606
                    }
6607
                }
6608
 
6609
              loc = sreloc->contents;
6610
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6611
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6612
 
6613
              if (skip == -1)
6614
                continue;
6615
 
6616
              /* This reloc will be computed at runtime.  We clear the memory
6617
                 so that it contains predictable value.  */
6618
              if (! skip
6619
                  && ((input_section->flags & SEC_ALLOC) != 0
6620
                      || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6621
                {
6622
                  relocation = howto->pc_relative ? outrel.r_offset : 0;
6623
                  addend = 0;
6624
                  break;
6625
                }
6626
            }
6627
          break;
6628
 
6629
        case R_PPC_RELAX32PC_PLT:
6630
        case R_PPC_RELAX32_PLT:
6631
          {
6632
            struct plt_entry *ent = find_plt_ent (h, got2, addend);
6633
 
6634
            if (htab->plt_type == PLT_NEW)
6635
              relocation = (htab->glink->output_section->vma
6636
                            + htab->glink->output_offset
6637
                            + ent->glink_offset);
6638
            else
6639
              relocation = (htab->plt->output_section->vma
6640
                            + htab->plt->output_offset
6641
                            + ent->plt.offset);
6642
            addend = 0;
6643
          }
6644
          if (r_type == R_PPC_RELAX32_PLT)
6645
            goto relax32;
6646
          /* Fall thru */
6647
 
6648
        case R_PPC_RELAX32PC:
6649
          relocation -= (input_section->output_section->vma
6650
                         + input_section->output_offset
6651
                         + rel->r_offset - 4);
6652
          /* Fall thru */
6653
 
6654
        case R_PPC_RELAX32:
6655
        relax32:
6656
          {
6657
            unsigned long t0;
6658
            unsigned long t1;
6659
 
6660
            t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6661
            t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6662
 
6663
            /* We're clearing the bits for R_PPC_ADDR16_HA
6664
               and R_PPC_ADDR16_LO here.  */
6665
            t0 &= ~0xffff;
6666
            t1 &= ~0xffff;
6667
 
6668
            /* t0 is HA, t1 is LO */
6669
            relocation += addend;
6670
            t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6671
            t1 |= relocation & 0xffff;
6672
 
6673
            bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6674
            bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6675
          }
6676
          continue;
6677
 
6678
          /* Indirect .sdata relocation.  */
6679
        case R_PPC_EMB_SDAI16:
6680
          BFD_ASSERT (htab->sdata[0].section != NULL);
6681
          relocation
6682
            = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6683
                                                 h, relocation, rel);
6684
          break;
6685
 
6686
          /* Indirect .sdata2 relocation.  */
6687
        case R_PPC_EMB_SDA2I16:
6688
          BFD_ASSERT (htab->sdata[1].section != NULL);
6689
          relocation
6690
            = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6691
                                                 h, relocation, rel);
6692
          break;
6693
 
6694
          /* Handle the TOC16 reloc.  We want to use the offset within the .got
6695
             section, not the actual VMA.  This is appropriate when generating
6696
             an embedded ELF object, for which the .got section acts like the
6697
             AIX .toc section.  */
6698
        case R_PPC_TOC16:                       /* phony GOT16 relocations */
6699
          BFD_ASSERT (sec != NULL);
6700
          BFD_ASSERT (bfd_is_und_section (sec)
6701
                      || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6702
                      || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6703
 
6704
            addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6705
          break;
6706
 
6707
        case R_PPC_PLTREL24:
6708
          /* Relocation is to the entry for this symbol in the
6709
             procedure linkage table.  */
6710
          {
6711
            struct plt_entry *ent = find_plt_ent (h, got2, addend);
6712
 
6713
            addend = 0;
6714
            if (ent == NULL
6715
                || htab->plt == NULL)
6716
              {
6717
                /* We didn't make a PLT entry for this symbol.  This
6718
                   happens when statically linking PIC code, or when
6719
                   using -Bsymbolic.  */
6720
                break;
6721
              }
6722
 
6723
            unresolved_reloc = FALSE;
6724
            if (htab->plt_type == PLT_NEW)
6725
              relocation = (htab->glink->output_section->vma
6726
                            + htab->glink->output_offset
6727
                            + ent->glink_offset);
6728
            else
6729
              relocation = (htab->plt->output_section->vma
6730
                            + htab->plt->output_offset
6731
                            + ent->plt.offset);
6732
          }
6733
          break;
6734
 
6735
          /* Relocate against _SDA_BASE_.  */
6736
        case R_PPC_SDAREL16:
6737
          {
6738
            const char *name;
6739
            struct elf_link_hash_entry *sh;
6740
 
6741
            BFD_ASSERT (sec != NULL);
6742
            name = bfd_get_section_name (abfd, sec->output_section);
6743
            if (! ((CONST_STRNEQ (name, ".sdata")
6744
                    && (name[6] == 0 || name[6] == '.'))
6745
                   || (CONST_STRNEQ (name, ".sbss")
6746
                       && (name[5] == 0 || name[5] == '.'))))
6747
              {
6748
                (*_bfd_error_handler)
6749
                  (_("%B: the target (%s) of a %s relocation is "
6750
                     "in the wrong output section (%s)"),
6751
                   input_bfd,
6752
                   sym_name,
6753
                   howto->name,
6754
                   name);
6755
              }
6756
            sh = htab->sdata[0].sym;
6757
            addend -= (sh->root.u.def.value
6758
                       + sh->root.u.def.section->output_offset
6759
                       + sh->root.u.def.section->output_section->vma);
6760
          }
6761
          break;
6762
 
6763
          /* Relocate against _SDA2_BASE_.  */
6764
        case R_PPC_EMB_SDA2REL:
6765
          {
6766
            const char *name;
6767
            struct elf_link_hash_entry *sh;
6768
 
6769
            BFD_ASSERT (sec != NULL);
6770
            name = bfd_get_section_name (abfd, sec->output_section);
6771
            if (! (CONST_STRNEQ (name, ".sdata2")
6772
                   || CONST_STRNEQ (name, ".sbss2")))
6773
              {
6774
                (*_bfd_error_handler)
6775
                  (_("%B: the target (%s) of a %s relocation is "
6776
                     "in the wrong output section (%s)"),
6777
                   input_bfd,
6778
                   sym_name,
6779
                   howto->name,
6780
                   name);
6781
 
6782
                bfd_set_error (bfd_error_bad_value);
6783
                ret = FALSE;
6784
                continue;
6785
              }
6786
            sh = htab->sdata[1].sym;
6787
            addend -= (sh->root.u.def.value
6788
                       + sh->root.u.def.section->output_offset
6789
                       + sh->root.u.def.section->output_section->vma);
6790
          }
6791
          break;
6792
 
6793
          /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0.  */
6794
        case R_PPC_EMB_SDA21:
6795
        case R_PPC_EMB_RELSDA:
6796
          {
6797
            const char *name;
6798
            int reg;
6799
            struct elf_link_hash_entry *sh;
6800
 
6801
            BFD_ASSERT (sec != NULL);
6802
            name = bfd_get_section_name (abfd, sec->output_section);
6803
            if (((CONST_STRNEQ (name, ".sdata")
6804
                  && (name[6] == 0 || name[6] == '.'))
6805
                 || (CONST_STRNEQ (name, ".sbss")
6806
                     && (name[5] == 0 || name[5] == '.'))))
6807
              {
6808
                reg = 13;
6809
                sh = htab->sdata[0].sym;
6810
                addend -= (sh->root.u.def.value
6811
                           + sh->root.u.def.section->output_offset
6812
                           + sh->root.u.def.section->output_section->vma);
6813
              }
6814
 
6815
            else if (CONST_STRNEQ (name, ".sdata2")
6816
                     || CONST_STRNEQ (name, ".sbss2"))
6817
              {
6818
                reg = 2;
6819
                sh = htab->sdata[1].sym;
6820
                addend -= (sh->root.u.def.value
6821
                           + sh->root.u.def.section->output_offset
6822
                           + sh->root.u.def.section->output_section->vma);
6823
              }
6824
 
6825
            else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6826
                     || strcmp (name, ".PPC.EMB.sbss0") == 0)
6827
              {
6828
                reg = 0;
6829
              }
6830
 
6831
            else
6832
              {
6833
                (*_bfd_error_handler)
6834
                  (_("%B: the target (%s) of a %s relocation is "
6835
                     "in the wrong output section (%s)"),
6836
                   input_bfd,
6837
                   sym_name,
6838
                   howto->name,
6839
                   name);
6840
 
6841
                bfd_set_error (bfd_error_bad_value);
6842
                ret = FALSE;
6843
                continue;
6844
              }
6845
 
6846
            if (r_type == R_PPC_EMB_SDA21)
6847
              {                 /* fill in register field */
6848
                insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6849
                insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6850
                bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6851
              }
6852
          }
6853
          break;
6854
 
6855
          /* Relocate against the beginning of the section.  */
6856
        case R_PPC_SECTOFF:
6857
        case R_PPC_SECTOFF_LO:
6858
        case R_PPC_SECTOFF_HI:
6859
        case R_PPC_SECTOFF_HA:
6860
          BFD_ASSERT (sec != NULL);
6861
          addend -= sec->output_section->vma;
6862
          break;
6863
 
6864
          /* Negative relocations.  */
6865
        case R_PPC_EMB_NADDR32:
6866
        case R_PPC_EMB_NADDR16:
6867
        case R_PPC_EMB_NADDR16_LO:
6868
        case R_PPC_EMB_NADDR16_HI:
6869
        case R_PPC_EMB_NADDR16_HA:
6870
          addend -= 2 * relocation;
6871
          break;
6872
 
6873
        case R_PPC_COPY:
6874
        case R_PPC_GLOB_DAT:
6875
        case R_PPC_JMP_SLOT:
6876
        case R_PPC_RELATIVE:
6877
        case R_PPC_PLT32:
6878
        case R_PPC_PLTREL32:
6879
        case R_PPC_PLT16_LO:
6880
        case R_PPC_PLT16_HI:
6881
        case R_PPC_PLT16_HA:
6882
        case R_PPC_ADDR30:
6883
        case R_PPC_EMB_RELSEC16:
6884
        case R_PPC_EMB_RELST_LO:
6885
        case R_PPC_EMB_RELST_HI:
6886
        case R_PPC_EMB_RELST_HA:
6887
        case R_PPC_EMB_BIT_FLD:
6888
          (*_bfd_error_handler)
6889
            (_("%B: relocation %s is not yet supported for symbol %s."),
6890
             input_bfd,
6891
             howto->name,
6892
             sym_name);
6893
 
6894
          bfd_set_error (bfd_error_invalid_operation);
6895
          ret = FALSE;
6896
          continue;
6897
        }
6898
 
6899
      /* Do any further special processing.  */
6900
      switch (r_type)
6901
        {
6902
        default:
6903
          break;
6904
 
6905
        case R_PPC_ADDR16_HA:
6906
        case R_PPC_REL16_HA:
6907
        case R_PPC_SECTOFF_HA:
6908
        case R_PPC_TPREL16_HA:
6909
        case R_PPC_DTPREL16_HA:
6910
        case R_PPC_EMB_NADDR16_HA:
6911
        case R_PPC_EMB_RELST_HA:
6912
          /* It's just possible that this symbol is a weak symbol
6913
             that's not actually defined anywhere.  In that case,
6914
             'sec' would be NULL, and we should leave the symbol
6915
             alone (it will be set to zero elsewhere in the link).  */
6916
          if (sec == NULL)
6917
            break;
6918
          /* Fall thru */
6919
 
6920
        case R_PPC_PLT16_HA:
6921
        case R_PPC_GOT16_HA:
6922
        case R_PPC_GOT_TLSGD16_HA:
6923
        case R_PPC_GOT_TLSLD16_HA:
6924
        case R_PPC_GOT_TPREL16_HA:
6925
        case R_PPC_GOT_DTPREL16_HA:
6926
          /* Add 0x10000 if sign bit in 0:15 is set.
6927
             Bits 0:15 are not used.  */
6928
          addend += 0x8000;
6929
          break;
6930
        }
6931
 
6932
#ifdef DEBUG
6933
      fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6934
               "offset = %ld, addend = %ld\n",
6935
               howto->name,
6936
               (int) r_type,
6937
               sym_name,
6938
               r_symndx,
6939
               (long) rel->r_offset,
6940
               (long) addend);
6941
#endif
6942
 
6943
      if (unresolved_reloc
6944
          && !((input_section->flags & SEC_DEBUGGING) != 0
6945
               && h->def_dynamic))
6946
        {
6947
          (*_bfd_error_handler)
6948
            (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6949
             input_bfd,
6950
             input_section,
6951
             (long) rel->r_offset,
6952
             howto->name,
6953
             sym_name);
6954
          ret = FALSE;
6955
        }
6956
 
6957
      r = _bfd_final_link_relocate (howto,
6958
                                    input_bfd,
6959
                                    input_section,
6960
                                    contents,
6961
                                    rel->r_offset,
6962
                                    relocation,
6963
                                    addend);
6964
 
6965
      if (r != bfd_reloc_ok)
6966
        {
6967
          if (r == bfd_reloc_overflow)
6968
            {
6969
              if (warned)
6970
                continue;
6971
              if (h != NULL
6972
                  && h->root.type == bfd_link_hash_undefweak
6973
                  && howto->pc_relative)
6974
                {
6975
                  /* Assume this is a call protected by other code that
6976
                     detect the symbol is undefined.  If this is the case,
6977
                     we can safely ignore the overflow.  If not, the
6978
                     program is hosed anyway, and a little warning isn't
6979
                     going to help.  */
6980
 
6981
                  continue;
6982
                }
6983
 
6984
              if (! (*info->callbacks->reloc_overflow) (info,
6985
                                                        (h ? &h->root : NULL),
6986
                                                        sym_name,
6987
                                                        howto->name,
6988
                                                        rel->r_addend,
6989
                                                        input_bfd,
6990
                                                        input_section,
6991
                                                        rel->r_offset))
6992
                return FALSE;
6993
            }
6994
          else
6995
            {
6996
              (*_bfd_error_handler)
6997
                (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6998
                 input_bfd, input_section,
6999
                 (long) rel->r_offset, howto->name, sym_name, (int) r);
7000
              ret = FALSE;
7001
            }
7002
        }
7003
    }
7004
 
7005
#ifdef DEBUG
7006
  fprintf (stderr, "\n");
7007
#endif
7008
 
7009
  return ret;
7010
}
7011
 
7012
#define PPC_LO(v) ((v) & 0xffff)
7013
#define PPC_HI(v) (((v) >> 16) & 0xffff)
7014
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
7015
 
7016
/* Finish up dynamic symbol handling.  We set the contents of various
7017
   dynamic sections here.  */
7018
 
7019
static bfd_boolean
7020
ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7021
                               struct bfd_link_info *info,
7022
                               struct elf_link_hash_entry *h,
7023
                               Elf_Internal_Sym *sym)
7024
{
7025
  struct ppc_elf_link_hash_table *htab;
7026
  struct plt_entry *ent;
7027
  bfd_boolean doneone;
7028
 
7029
#ifdef DEBUG
7030
  fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7031
           h->root.root.string);
7032
#endif
7033
 
7034
  htab = ppc_elf_hash_table (info);
7035
  BFD_ASSERT (htab->elf.dynobj != NULL);
7036
 
7037
  doneone = FALSE;
7038
  for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7039
    if (ent->plt.offset != (bfd_vma) -1)
7040
      {
7041
        if (!doneone)
7042
          {
7043
            Elf_Internal_Rela rela;
7044
            bfd_byte *loc;
7045
            bfd_vma reloc_index;
7046
 
7047
            if (htab->plt_type == PLT_NEW)
7048
              reloc_index = ent->plt.offset / 4;
7049
            else
7050
              {
7051
                reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7052
                               / htab->plt_slot_size);
7053
                if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7054
                    && htab->plt_type == PLT_OLD)
7055
                  reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7056
              }
7057
 
7058
            /* This symbol has an entry in the procedure linkage table.
7059
               Set it up.  */
7060
            if (htab->plt_type == PLT_VXWORKS)
7061
              {
7062
                bfd_vma got_offset;
7063
                const bfd_vma *plt_entry;
7064
 
7065
                /* The first three entries in .got.plt are reserved.  */
7066
                got_offset = (reloc_index + 3) * 4;
7067
 
7068
                /* Use the right PLT. */
7069
                plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7070
                            : ppc_elf_vxworks_plt_entry;
7071
 
7072
                /* Fill in the .plt on VxWorks.  */
7073
                if (info->shared)
7074
                  {
7075
                    bfd_vma got_offset_hi = (got_offset >> 16)
7076
                                            + ((got_offset & 0x8000) >> 15);
7077
 
7078
                    bfd_put_32 (output_bfd,
7079
                                plt_entry[0] | (got_offset_hi & 0xffff),
7080
                                htab->plt->contents + ent->plt.offset + 0);
7081
                    bfd_put_32 (output_bfd,
7082
                                plt_entry[1] | (got_offset & 0xffff),
7083
                                htab->plt->contents + ent->plt.offset + 4);
7084
                  }
7085
                else
7086
                  {
7087
                    bfd_vma got_loc
7088
                      = (got_offset
7089
                         + htab->elf.hgot->root.u.def.value
7090
                         + htab->elf.hgot->root.u.def.section->output_offset
7091
                         + htab->elf.hgot->root.u.def.section->output_section->vma);
7092
                    bfd_vma got_loc_hi = (got_loc >> 16)
7093
                                         + ((got_loc & 0x8000) >> 15);
7094
 
7095
                    bfd_put_32 (output_bfd,
7096
                                plt_entry[0] | (got_loc_hi & 0xffff),
7097
                                htab->plt->contents + ent->plt.offset + 0);
7098
                    bfd_put_32 (output_bfd,
7099
                                plt_entry[1] | (got_loc & 0xffff),
7100
                                htab->plt->contents + ent->plt.offset + 4);
7101
                  }
7102
 
7103
                bfd_put_32 (output_bfd, plt_entry[2],
7104
                            htab->plt->contents + ent->plt.offset + 8);
7105
                bfd_put_32 (output_bfd, plt_entry[3],
7106
                            htab->plt->contents + ent->plt.offset + 12);
7107
 
7108
                /* This instruction is an immediate load.  The value loaded is
7109
                   the byte offset of the R_PPC_JMP_SLOT relocation from the
7110
                   start of the .rela.plt section.  The value is stored in the
7111
                   low-order 16 bits of the load instruction.  */
7112
                /* NOTE: It appears that this is now an index rather than a
7113
                   prescaled offset.  */
7114
                bfd_put_32 (output_bfd,
7115
                            plt_entry[4] | reloc_index,
7116
                            htab->plt->contents + ent->plt.offset + 16);
7117
                /* This instruction is a PC-relative branch whose target is
7118
                   the start of the PLT section.  The address of this branch
7119
                   instruction is 20 bytes beyond the start of this PLT entry.
7120
                   The address is encoded in bits 6-29, inclusive.  The value
7121
                   stored is right-shifted by two bits, permitting a 26-bit
7122
                   offset.  */
7123
                bfd_put_32 (output_bfd,
7124
                            (plt_entry[5]
7125
                             | (-(ent->plt.offset + 20) & 0x03fffffc)),
7126
                            htab->plt->contents + ent->plt.offset + 20);
7127
                bfd_put_32 (output_bfd, plt_entry[6],
7128
                            htab->plt->contents + ent->plt.offset + 24);
7129
                bfd_put_32 (output_bfd, plt_entry[7],
7130
                            htab->plt->contents + ent->plt.offset + 28);
7131
 
7132
                /* Fill in the GOT entry corresponding to this PLT slot with
7133
                   the address immediately after the the "bctr" instruction
7134
                   in this PLT entry.  */
7135
                bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7136
                                         + htab->plt->output_offset
7137
                                         + ent->plt.offset + 16),
7138
                            htab->sgotplt->contents + got_offset);
7139
 
7140
                if (!info->shared)
7141
                  {
7142
                    /* Fill in a couple of entries in .rela.plt.unloaded.  */
7143
                    loc = htab->srelplt2->contents
7144
                      + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7145
                          * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7146
                         * sizeof (Elf32_External_Rela));
7147
 
7148
                    /* Provide the @ha relocation for the first instruction.  */
7149
                    rela.r_offset = (htab->plt->output_section->vma
7150
                                     + htab->plt->output_offset
7151
                                     + ent->plt.offset + 2);
7152
                    rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7153
                                                R_PPC_ADDR16_HA);
7154
                    rela.r_addend = got_offset;
7155
                    bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7156
                    loc += sizeof (Elf32_External_Rela);
7157
 
7158
                    /* Provide the @l relocation for the second instruction.  */
7159
                    rela.r_offset = (htab->plt->output_section->vma
7160
                                     + htab->plt->output_offset
7161
                                     + ent->plt.offset + 6);
7162
                    rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7163
                                                R_PPC_ADDR16_LO);
7164
                    rela.r_addend = got_offset;
7165
                    bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7166
                    loc += sizeof (Elf32_External_Rela);
7167
 
7168
                    /* Provide a relocation for the GOT entry corresponding to this
7169
                       PLT slot.  Point it at the middle of the .plt entry.  */
7170
                    rela.r_offset = (htab->sgotplt->output_section->vma
7171
                                     + htab->sgotplt->output_offset
7172
                                     + got_offset);
7173
                    rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7174
                                                R_PPC_ADDR32);
7175
                    rela.r_addend = ent->plt.offset + 16;
7176
                    bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7177
                  }
7178
 
7179
                /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7180
                   In particular, the offset for the relocation is not the
7181
                   address of the PLT entry for this function, as specified
7182
                   by the ABI.  Instead, the offset is set to the address of
7183
                   the GOT slot for this function.  See EABI 4.4.4.1.  */
7184
                rela.r_offset = (htab->sgotplt->output_section->vma
7185
                                 + htab->sgotplt->output_offset
7186
                                 + got_offset);
7187
 
7188
              }
7189
            else
7190
              {
7191
                rela.r_offset = (htab->plt->output_section->vma
7192
                                 + htab->plt->output_offset
7193
                                 + ent->plt.offset);
7194
                if (htab->plt_type == PLT_OLD)
7195
                  {
7196
                    /* We don't need to fill in the .plt.  The ppc dynamic
7197
                       linker will fill it in.  */
7198
                  }
7199
                else
7200
                  {
7201
                    bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7202
                                   + htab->glink->output_section->vma
7203
                                   + htab->glink->output_offset);
7204
                    bfd_put_32 (output_bfd, val,
7205
                                htab->plt->contents + ent->plt.offset);
7206
                  }
7207
              }
7208
 
7209
            /* Fill in the entry in the .rela.plt section.  */
7210
            rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7211
            rela.r_addend = 0;
7212
 
7213
            loc = (htab->relplt->contents
7214
                   + reloc_index * sizeof (Elf32_External_Rela));
7215
            bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7216
 
7217
            if (!h->def_regular)
7218
              {
7219
                /* Mark the symbol as undefined, rather than as
7220
                   defined in the .plt section.  Leave the value if
7221
                   there were any relocations where pointer equality
7222
                   matters (this is a clue for the dynamic linker, to
7223
                   make function pointer comparisons work between an
7224
                   application and shared library), otherwise set it
7225
                   to zero.  */
7226
                sym->st_shndx = SHN_UNDEF;
7227
                if (!h->pointer_equality_needed)
7228
                  sym->st_value = 0;
7229
                else if (!h->ref_regular_nonweak)
7230
                  {
7231
                    /* This breaks function pointer comparisons, but
7232
                       that is better than breaking tests for a NULL
7233
                       function pointer.  */
7234
                    sym->st_value = 0;
7235
                  }
7236
              }
7237
            doneone = TRUE;
7238
          }
7239
 
7240
        if (htab->plt_type == PLT_NEW)
7241
          {
7242
            bfd_vma plt;
7243
            unsigned char *p;
7244
 
7245
            plt = (ent->plt.offset
7246
                   + htab->plt->output_section->vma
7247
                   + htab->plt->output_offset);
7248
            p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7249
 
7250
            if (info->shared || info->pie)
7251
              {
7252
                bfd_vma got = 0;
7253
 
7254
                if (ent->addend >= 32768)
7255
                  got = (ent->addend
7256
                         + ent->sec->output_section->vma
7257
                         + ent->sec->output_offset);
7258
                else if (htab->elf.hgot != NULL)
7259
                  got = (htab->elf.hgot->root.u.def.value
7260
                         + htab->elf.hgot->root.u.def.section->output_section->vma
7261
                         + htab->elf.hgot->root.u.def.section->output_offset);
7262
 
7263
                plt -= got;
7264
 
7265
                if (plt + 0x8000 < 0x10000)
7266
                  {
7267
                    bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7268
                    p += 4;
7269
                    bfd_put_32 (output_bfd, MTCTR_11, p);
7270
                    p += 4;
7271
                    bfd_put_32 (output_bfd, BCTR, p);
7272
                    p += 4;
7273
                    bfd_put_32 (output_bfd, NOP, p);
7274
                    p += 4;
7275
                  }
7276
                else
7277
                  {
7278
                    bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7279
                    p += 4;
7280
                    bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7281
                    p += 4;
7282
                    bfd_put_32 (output_bfd, MTCTR_11, p);
7283
                    p += 4;
7284
                    bfd_put_32 (output_bfd, BCTR, p);
7285
                    p += 4;
7286
                  }
7287
              }
7288
            else
7289
              {
7290
                bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7291
                p += 4;
7292
                bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7293
                p += 4;
7294
                bfd_put_32 (output_bfd, MTCTR_11, p);
7295
                p += 4;
7296
                bfd_put_32 (output_bfd, BCTR, p);
7297
                p += 4;
7298
 
7299
                /* We only need one non-PIC glink stub.  */
7300
                break;
7301
              }
7302
          }
7303
        else
7304
          break;
7305
      }
7306
 
7307
  if (h->needs_copy)
7308
    {
7309
      asection *s;
7310
      Elf_Internal_Rela rela;
7311
      bfd_byte *loc;
7312
 
7313
      /* This symbols needs a copy reloc.  Set it up.  */
7314
 
7315
#ifdef DEBUG
7316
      fprintf (stderr, ", copy");
7317
#endif
7318
 
7319
      BFD_ASSERT (h->dynindx != -1);
7320
 
7321
      if (ppc_elf_hash_entry (h)->has_sda_refs)
7322
        s = htab->relsbss;
7323
      else
7324
        s = htab->relbss;
7325
      BFD_ASSERT (s != NULL);
7326
 
7327
      rela.r_offset = (h->root.u.def.value
7328
                       + h->root.u.def.section->output_section->vma
7329
                       + h->root.u.def.section->output_offset);
7330
      rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7331
      rela.r_addend = 0;
7332
      loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7333
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7334
    }
7335
 
7336
#ifdef DEBUG
7337
  fprintf (stderr, "\n");
7338
#endif
7339
 
7340
  /* Mark some specially defined symbols as absolute.  */
7341
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7342
      || (!htab->is_vxworks
7343
          && (h == htab->elf.hgot
7344
              || strcmp (h->root.root.string,
7345
                         "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7346
    sym->st_shndx = SHN_ABS;
7347
 
7348
  return TRUE;
7349
}
7350
 
7351
static enum elf_reloc_type_class
7352
ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7353
{
7354
  switch (ELF32_R_TYPE (rela->r_info))
7355
    {
7356
    case R_PPC_RELATIVE:
7357
      return reloc_class_relative;
7358
    case R_PPC_REL24:
7359
    case R_PPC_ADDR24:
7360
    case R_PPC_JMP_SLOT:
7361
      return reloc_class_plt;
7362
    case R_PPC_COPY:
7363
      return reloc_class_copy;
7364
    default:
7365
      return reloc_class_normal;
7366
    }
7367
}
7368
 
7369
/* Finish up the dynamic sections.  */
7370
 
7371
static bfd_boolean
7372
ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7373
                                 struct bfd_link_info *info)
7374
{
7375
  asection *sdyn;
7376
  asection *splt;
7377
  struct ppc_elf_link_hash_table *htab;
7378
  bfd_vma got;
7379
  bfd * dynobj;
7380
 
7381
#ifdef DEBUG
7382
  fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7383
#endif
7384
 
7385
  htab = ppc_elf_hash_table (info);
7386
  dynobj = elf_hash_table (info)->dynobj;
7387
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7388
  if (htab->is_vxworks)
7389
    splt = bfd_get_section_by_name (dynobj, ".plt");
7390
  else
7391
    splt = NULL;
7392
 
7393
  got = 0;
7394
  if (htab->elf.hgot != NULL)
7395
    got = (htab->elf.hgot->root.u.def.value
7396
           + htab->elf.hgot->root.u.def.section->output_section->vma
7397
           + htab->elf.hgot->root.u.def.section->output_offset);
7398
 
7399
  if (htab->elf.dynamic_sections_created)
7400
    {
7401
      Elf32_External_Dyn *dyncon, *dynconend;
7402
 
7403
      BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7404
 
7405
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
7406
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7407
      for (; dyncon < dynconend; dyncon++)
7408
        {
7409
          Elf_Internal_Dyn dyn;
7410
          asection *s;
7411
 
7412
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7413
 
7414
          switch (dyn.d_tag)
7415
            {
7416
            case DT_PLTGOT:
7417
              if (htab->is_vxworks)
7418
                s = htab->sgotplt;
7419
              else
7420
                s = htab->plt;
7421
              dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7422
              break;
7423
 
7424
            case DT_PLTRELSZ:
7425
              dyn.d_un.d_val = htab->relplt->size;
7426
              break;
7427
 
7428
            case DT_JMPREL:
7429
              s = htab->relplt;
7430
              dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7431
              break;
7432
 
7433
            case DT_PPC_GOT:
7434
              dyn.d_un.d_ptr = got;
7435
              break;
7436
 
7437
            case DT_RELASZ:
7438
              if (htab->is_vxworks)
7439
                {
7440
                  if (htab->relplt)
7441
                    dyn.d_un.d_ptr -= htab->relplt->size;
7442
                  break;
7443
                }
7444
              continue;
7445
 
7446
            default:
7447
              if (htab->is_vxworks
7448
                  && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7449
                break;
7450
              continue;
7451
            }
7452
 
7453
          bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7454
        }
7455
    }
7456
 
7457
  /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7458
     easily find the address of the _GLOBAL_OFFSET_TABLE_.  */
7459
  if (htab->got != NULL)
7460
    {
7461
      unsigned char *p = htab->got->contents;
7462
      bfd_vma val;
7463
 
7464
      p += htab->elf.hgot->root.u.def.value;
7465
      if (htab->plt_type == PLT_OLD)
7466
        bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7467
 
7468
      val = 0;
7469
      if (sdyn != NULL)
7470
        val = sdyn->output_section->vma + sdyn->output_offset;
7471
      bfd_put_32 (output_bfd, val, p);
7472
 
7473
      elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7474
    }
7475
 
7476
  /* Fill in the first entry in the VxWorks procedure linkage table.  */
7477
  if (splt && splt->size > 0)
7478
    {
7479
      /* Use the right PLT. */
7480
      static const bfd_vma *plt_entry = NULL;
7481
      plt_entry = info->shared ?
7482
        ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7483
 
7484
      if (!info->shared)
7485
        {
7486
          bfd_vma got_value =
7487
            (htab->elf.hgot->root.u.def.section->output_section->vma
7488
             + htab->elf.hgot->root.u.def.section->output_offset
7489
             + htab->elf.hgot->root.u.def.value);
7490
          bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7491
 
7492
          bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7493
                      splt->contents +  0);
7494
          bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7495
                      splt->contents +  4);
7496
        }
7497
      else
7498
        {
7499
          bfd_put_32 (output_bfd, plt_entry[0], splt->contents +  0);
7500
          bfd_put_32 (output_bfd, plt_entry[1], splt->contents +  4);
7501
        }
7502
      bfd_put_32 (output_bfd, plt_entry[2], splt->contents +  8);
7503
      bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7504
      bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7505
      bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7506
      bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7507
      bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7508
 
7509
      if (! info->shared)
7510
        {
7511
          Elf_Internal_Rela rela;
7512
          bfd_byte *loc;
7513
 
7514
          loc = htab->srelplt2->contents;
7515
 
7516
          /* Output the @ha relocation for the first instruction.  */
7517
          rela.r_offset = (htab->plt->output_section->vma
7518
                           + htab->plt->output_offset
7519
                           + 2);
7520
          rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7521
          rela.r_addend = 0;
7522
          bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7523
          loc += sizeof (Elf32_External_Rela);
7524
 
7525
          /* Output the @l relocation for the second instruction.  */
7526
          rela.r_offset = (htab->plt->output_section->vma
7527
                           + htab->plt->output_offset
7528
                           + 6);
7529
          rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7530
          rela.r_addend = 0;
7531
          bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7532
          loc += sizeof (Elf32_External_Rela);
7533
 
7534
          /* Fix up the remaining relocations.  They may have the wrong
7535
             symbol index for _G_O_T_ or _P_L_T_ depending on the order
7536
             in which symbols were output.  */
7537
          while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7538
            {
7539
              Elf_Internal_Rela rel;
7540
 
7541
              bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7542
              rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7543
              bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7544
              loc += sizeof (Elf32_External_Rela);
7545
 
7546
              bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7547
              rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7548
              bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7549
              loc += sizeof (Elf32_External_Rela);
7550
 
7551
              bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7552
              rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7553
              bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7554
              loc += sizeof (Elf32_External_Rela);
7555
            }
7556
        }
7557
    }
7558
 
7559
  if (htab->glink != NULL && htab->glink->contents != NULL)
7560
    {
7561
      unsigned char *p;
7562
      unsigned char *endp;
7563
      bfd_vma res0;
7564
      unsigned int i;
7565
 
7566
      /*
7567
       * PIC glink code is the following:
7568
       *
7569
       * # ith PLT code stub.
7570
       *   addis 11,30,(plt+(i-1)*4-got)@ha
7571
       *   lwz 11,(plt+(i-1)*4-got)@l(11)
7572
       *   mtctr 11
7573
       *   bctr
7574
       *
7575
       * # A table of branches, one for each plt entry.
7576
       * # The idea is that the plt call stub loads ctr and r11 with these
7577
       * # addresses, so (r11 - res_0) gives the plt index * 4.
7578
       * res_0: b PLTresolve
7579
       * res_1: b PLTresolve
7580
       * .
7581
       * # Some number of entries towards the end can be nops
7582
       * res_n_m3: nop
7583
       * res_n_m2: nop
7584
       * res_n_m1:
7585
       *
7586
       * PLTresolve:
7587
       *    addis 11,11,(1f-res_0)@ha
7588
       *    mflr 0
7589
       *    bcl 20,31,1f
7590
       * 1: addi 11,11,(1b-res_0)@l
7591
       *    mflr 12
7592
       *    mtlr 0
7593
       *    sub 11,11,12                # r11 = index * 4
7594
       *    addis 12,12,(got+4-1b)@ha
7595
       *    lwz 0,(got+4-1b)@l(12)      # got[1] address of dl_runtime_resolve
7596
       *    lwz 12,(got+8-1b)@l(12)     # got[2] contains the map address
7597
       *    mtctr 0
7598
       *    add 0,11,11
7599
       *    add 11,0,11                 # r11 = index * 12 = reloc offset.
7600
       *    bctr
7601
       */
7602
      static const unsigned int pic_plt_resolve[] =
7603
        {
7604
          ADDIS_11_11,
7605
          MFLR_0,
7606
          BCL_20_31,
7607
          ADDI_11_11,
7608
          MFLR_12,
7609
          MTLR_0,
7610
          SUB_11_11_12,
7611
          ADDIS_12_12,
7612
          LWZ_0_12,
7613
          LWZ_12_12,
7614
          MTCTR_0,
7615
          ADD_0_11_11,
7616
          ADD_11_0_11,
7617
          BCTR,
7618
          NOP,
7619
          NOP
7620
        };
7621
 
7622
      /*
7623
       * Non-PIC glink code is a little simpler.
7624
       *
7625
       * # ith PLT code stub.
7626
       *   lis 11,(plt+(i-1)*4)@ha
7627
       *   lwz 11,(plt+(i-1)*4)@l(11)
7628
       *   mtctr 11
7629
       *   bctr
7630
       *
7631
       * The branch table is the same, then comes
7632
       *
7633
       * PLTresolve:
7634
       *    lis 12,(got+4)@ha
7635
       *    addis 11,11,(-res_0)@ha
7636
       *    lwz 0,(got+4)@l(12)         # got[1] address of dl_runtime_resolve
7637
       *    addi 11,11,(-res_0)@l       # r11 = index * 4
7638
       *    mtctr 0
7639
       *    add 0,11,11
7640
       *    lwz 12,(got+8)@l(12)        # got[2] contains the map address
7641
       *    add 11,0,11                 # r11 = index * 12 = reloc offset.
7642
       *    bctr
7643
       */
7644
      static const unsigned int plt_resolve[] =
7645
        {
7646
          LIS_12,
7647
          ADDIS_11_11,
7648
          LWZ_0_12,
7649
          ADDI_11_11,
7650
          MTCTR_0,
7651
          ADD_0_11_11,
7652
          LWZ_12_12,
7653
          ADD_11_0_11,
7654
          BCTR,
7655
          NOP,
7656
          NOP,
7657
          NOP,
7658
          NOP,
7659
          NOP,
7660
          NOP,
7661
          NOP
7662
        };
7663
 
7664
      if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7665
        abort ();
7666
      if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7667
        abort ();
7668
 
7669
      /* Build the branch table, one for each plt entry (less one),
7670
         and perhaps some padding.  */
7671
      p = htab->glink->contents;
7672
      p += htab->glink_pltresolve;
7673
      endp = htab->glink->contents;
7674
      endp += htab->glink->size - GLINK_PLTRESOLVE;
7675
      while (p < endp - 8 * 4)
7676
        {
7677
          bfd_put_32 (output_bfd, B + endp - p, p);
7678
          p += 4;
7679
        }
7680
      while (p < endp)
7681
        {
7682
          bfd_put_32 (output_bfd, NOP, p);
7683
          p += 4;
7684
        }
7685
 
7686
      res0 = (htab->glink_pltresolve
7687
              + htab->glink->output_section->vma
7688
              + htab->glink->output_offset);
7689
 
7690
      /* Last comes the PLTresolve stub.  */
7691
      if (info->shared || info->pie)
7692
        {
7693
          bfd_vma bcl;
7694
 
7695
          for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7696
            {
7697
              bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7698
              p += 4;
7699
            }
7700
          p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7701
 
7702
          bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7703
                 + htab->glink->output_section->vma
7704
                 + htab->glink->output_offset);
7705
 
7706
          bfd_put_32 (output_bfd,
7707
                      ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7708
          bfd_put_32 (output_bfd,
7709
                      ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7710
          bfd_put_32 (output_bfd,
7711
                      ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7712
          if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7713
            {
7714
              bfd_put_32 (output_bfd,
7715
                          LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7716
              bfd_put_32 (output_bfd,
7717
                          LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7718
            }
7719
          else
7720
            {
7721
              bfd_put_32 (output_bfd,
7722
                          LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7723
              bfd_put_32 (output_bfd,
7724
                          LWZ_12_12 + 4, p + 9*4);
7725
            }
7726
        }
7727
      else
7728
        {
7729
          for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7730
            {
7731
              bfd_put_32 (output_bfd, plt_resolve[i], p);
7732
              p += 4;
7733
            }
7734
          p -= 4 * ARRAY_SIZE (plt_resolve);
7735
 
7736
          bfd_put_32 (output_bfd,
7737
                      LIS_12 + PPC_HA (got + 4), p + 0*4);
7738
          bfd_put_32 (output_bfd,
7739
                      ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7740
          bfd_put_32 (output_bfd,
7741
                      ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7742
          if (PPC_HA (got + 4) == PPC_HA (got + 8))
7743
            {
7744
              bfd_put_32 (output_bfd,
7745
                          LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7746
              bfd_put_32 (output_bfd,
7747
                          LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7748
            }
7749
          else
7750
            {
7751
              bfd_put_32 (output_bfd,
7752
                          LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7753
              bfd_put_32 (output_bfd,
7754
                          LWZ_12_12 + 4, p + 6*4);
7755
            }
7756
        }
7757
    }
7758
 
7759
  return TRUE;
7760
}
7761
 
7762
#define TARGET_LITTLE_SYM       bfd_elf32_powerpcle_vec
7763
#define TARGET_LITTLE_NAME      "elf32-powerpcle"
7764
#define TARGET_BIG_SYM          bfd_elf32_powerpc_vec
7765
#define TARGET_BIG_NAME         "elf32-powerpc"
7766
#define ELF_ARCH                bfd_arch_powerpc
7767
#define ELF_MACHINE_CODE        EM_PPC
7768
#ifdef __QNXTARGET__
7769
#define ELF_MAXPAGESIZE         0x1000
7770
#else
7771
#define ELF_MAXPAGESIZE         0x10000
7772
#endif
7773
#define ELF_MINPAGESIZE         0x1000
7774
#define ELF_COMMONPAGESIZE      0x1000
7775
#define elf_info_to_howto       ppc_elf_info_to_howto
7776
 
7777
#ifdef  EM_CYGNUS_POWERPC
7778
#define ELF_MACHINE_ALT1        EM_CYGNUS_POWERPC
7779
#endif
7780
 
7781
#ifdef EM_PPC_OLD
7782
#define ELF_MACHINE_ALT2        EM_PPC_OLD
7783
#endif
7784
 
7785
#define elf_backend_plt_not_loaded      1
7786
#define elf_backend_can_gc_sections     1
7787
#define elf_backend_can_refcount        1
7788
#define elf_backend_rela_normal         1
7789
 
7790
#define bfd_elf32_mkobject                      ppc_elf_mkobject
7791
#define bfd_elf32_bfd_merge_private_bfd_data    ppc_elf_merge_private_bfd_data
7792
#define bfd_elf32_bfd_relax_section             ppc_elf_relax_section
7793
#define bfd_elf32_bfd_reloc_type_lookup         ppc_elf_reloc_type_lookup
7794
#define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7795
#define bfd_elf32_bfd_set_private_flags         ppc_elf_set_private_flags
7796
#define bfd_elf32_bfd_link_hash_table_create    ppc_elf_link_hash_table_create
7797
 
7798
#define elf_backend_object_p                    ppc_elf_object_p
7799
#define elf_backend_gc_mark_hook                ppc_elf_gc_mark_hook
7800
#define elf_backend_gc_sweep_hook               ppc_elf_gc_sweep_hook
7801
#define elf_backend_section_from_shdr           ppc_elf_section_from_shdr
7802
#define elf_backend_relocate_section            ppc_elf_relocate_section
7803
#define elf_backend_create_dynamic_sections     ppc_elf_create_dynamic_sections
7804
#define elf_backend_check_relocs                ppc_elf_check_relocs
7805
#define elf_backend_copy_indirect_symbol        ppc_elf_copy_indirect_symbol
7806
#define elf_backend_adjust_dynamic_symbol       ppc_elf_adjust_dynamic_symbol
7807
#define elf_backend_add_symbol_hook             ppc_elf_add_symbol_hook
7808
#define elf_backend_size_dynamic_sections       ppc_elf_size_dynamic_sections
7809
#define elf_backend_hash_symbol                 ppc_elf_hash_symbol
7810
#define elf_backend_finish_dynamic_symbol       ppc_elf_finish_dynamic_symbol
7811
#define elf_backend_finish_dynamic_sections     ppc_elf_finish_dynamic_sections
7812
#define elf_backend_fake_sections               ppc_elf_fake_sections
7813
#define elf_backend_additional_program_headers  ppc_elf_additional_program_headers
7814
#define elf_backend_grok_prstatus               ppc_elf_grok_prstatus
7815
#define elf_backend_grok_psinfo                 ppc_elf_grok_psinfo
7816
#define elf_backend_write_core_note             ppc_elf_write_core_note
7817
#define elf_backend_reloc_type_class            ppc_elf_reloc_type_class
7818
#define elf_backend_begin_write_processing      ppc_elf_begin_write_processing
7819
#define elf_backend_final_write_processing      ppc_elf_final_write_processing
7820
#define elf_backend_write_section               ppc_elf_write_section
7821
#define elf_backend_get_sec_type_attr           ppc_elf_get_sec_type_attr
7822
#define elf_backend_plt_sym_val                 ppc_elf_plt_sym_val
7823
#define elf_backend_action_discarded            ppc_elf_action_discarded
7824
#define elf_backend_init_index_section          _bfd_elf_init_1_index_section
7825
 
7826
#include "elf32-target.h"
7827
 
7828
/* VxWorks Target */
7829
 
7830
#undef TARGET_LITTLE_SYM
7831
#undef TARGET_LITTLE_NAME
7832
 
7833
#undef TARGET_BIG_SYM
7834
#define TARGET_BIG_SYM          bfd_elf32_powerpc_vxworks_vec
7835
#undef TARGET_BIG_NAME
7836
#define TARGET_BIG_NAME         "elf32-powerpc-vxworks"
7837
 
7838
/* VxWorks uses the elf default section flags for .plt.  */
7839
static const struct bfd_elf_special_section *
7840
ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7841
{
7842
  if (sec->name == NULL)
7843
    return NULL;
7844
 
7845
  if (strcmp (sec->name, ".plt") == 0)
7846
    return _bfd_elf_get_sec_type_attr (abfd, sec);
7847
 
7848
  return ppc_elf_get_sec_type_attr (abfd, sec);
7849
}
7850
 
7851
/* Like ppc_elf_link_hash_table_create, but overrides
7852
   appropriately for VxWorks.  */
7853
static struct bfd_link_hash_table *
7854
ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7855
{
7856
  struct bfd_link_hash_table *ret;
7857
 
7858
  ret = ppc_elf_link_hash_table_create (abfd);
7859
  if (ret)
7860
    {
7861
      struct ppc_elf_link_hash_table *htab
7862
        = (struct ppc_elf_link_hash_table *)ret;
7863
      htab->is_vxworks = 1;
7864
      htab->plt_type = PLT_VXWORKS;
7865
      htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7866
      htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7867
      htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7868
    }
7869
  return ret;
7870
}
7871
 
7872
/* Tweak magic VxWorks symbols as they are loaded.  */
7873
static bfd_boolean
7874
ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7875
                                 struct bfd_link_info *info,
7876
                                 Elf_Internal_Sym *sym,
7877
                                 const char **namep ATTRIBUTE_UNUSED,
7878
                                 flagword *flagsp ATTRIBUTE_UNUSED,
7879
                                 asection **secp,
7880
                                 bfd_vma *valp)
7881
{
7882
  if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7883
                                   valp))
7884
    return FALSE;
7885
 
7886
  return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7887
}
7888
 
7889
static void
7890
ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7891
{
7892
  ppc_elf_final_write_processing(abfd, linker);
7893
  elf_vxworks_final_write_processing(abfd, linker);
7894
}
7895
 
7896
/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7897
   define it.  */
7898
#undef elf_backend_want_plt_sym
7899
#define elf_backend_want_plt_sym                1
7900
#undef elf_backend_want_got_plt
7901
#define elf_backend_want_got_plt                1
7902
#undef elf_backend_got_symbol_offset
7903
#define elf_backend_got_symbol_offset           0
7904
#undef elf_backend_plt_not_loaded
7905
#define elf_backend_plt_not_loaded              0
7906
#undef elf_backend_plt_readonly
7907
#define elf_backend_plt_readonly                1
7908
#undef elf_backend_got_header_size
7909
#define elf_backend_got_header_size             12
7910
 
7911
#undef bfd_elf32_bfd_link_hash_table_create
7912
#define bfd_elf32_bfd_link_hash_table_create \
7913
  ppc_elf_vxworks_link_hash_table_create
7914
#undef elf_backend_add_symbol_hook
7915
#define elf_backend_add_symbol_hook \
7916
  ppc_elf_vxworks_add_symbol_hook
7917
#undef elf_backend_link_output_symbol_hook
7918
#define elf_backend_link_output_symbol_hook \
7919
  elf_vxworks_link_output_symbol_hook
7920
#undef elf_backend_final_write_processing
7921
#define elf_backend_final_write_processing \
7922
  ppc_elf_vxworks_final_write_processing
7923
#undef elf_backend_get_sec_type_attr
7924
#define elf_backend_get_sec_type_attr \
7925
  ppc_elf_vxworks_get_sec_type_attr
7926
#undef elf_backend_emit_relocs
7927
#define elf_backend_emit_relocs \
7928
  elf_vxworks_emit_relocs
7929
 
7930
#undef elf32_bed
7931
#define elf32_bed                               ppc_elf_vxworks_bed
7932
 
7933
#include "elf32-target.h"

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