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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [elf32-ppc.c] - Blame information for rev 157

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1 24 jeremybenn
/* 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
      /* Also discard relocs on undefined weak syms with non-default
4815
         visibility.  */
4816
      if (eh->dyn_relocs != NULL
4817
          && h->root.type == bfd_link_hash_undefweak)
4818
        {
4819
          if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4820
            eh->dyn_relocs = NULL;
4821
 
4822
          /* Make sure undefined weak symbols are output as a dynamic
4823
             symbol in PIEs.  */
4824
          else if (h->dynindx == -1
4825
                   && !h->forced_local)
4826
            {
4827
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
4828
                return FALSE;
4829
            }
4830
        }
4831
    }
4832
  else if (ELIMINATE_COPY_RELOCS)
4833
    {
4834
      /* For the non-shared case, discard space for relocs against
4835
         symbols which turn out to need copy relocs or are not
4836
         dynamic.  */
4837
 
4838
      if (!h->non_got_ref
4839
          && !h->def_regular)
4840
        {
4841
          /* Make sure this symbol is output as a dynamic symbol.
4842
             Undefined weak syms won't yet be marked as dynamic.  */
4843
          if (h->dynindx == -1
4844
              && !h->forced_local)
4845
            {
4846
              if (! bfd_elf_link_record_dynamic_symbol (info, h))
4847
                return FALSE;
4848
            }
4849
 
4850
          /* If that succeeded, we know we'll be keeping all the
4851
             relocs.  */
4852
          if (h->dynindx != -1)
4853
            goto keep;
4854
        }
4855
 
4856
      eh->dyn_relocs = NULL;
4857
 
4858
    keep: ;
4859
    }
4860
 
4861
  /* Finally, allocate space.  */
4862
  for (p = eh->dyn_relocs; p != NULL; p = p->next)
4863
    {
4864
      asection *sreloc = elf_section_data (p->sec)->sreloc;
4865
      sreloc->size += p->count * sizeof (Elf32_External_Rela);
4866
    }
4867
 
4868
  return TRUE;
4869
}
4870
 
4871
/* Set DF_TEXTREL if we find any dynamic relocs that apply to
4872
   read-only sections.  */
4873
 
4874
static bfd_boolean
4875
maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
4876
{
4877
  if (h->root.type == bfd_link_hash_indirect)
4878
    return TRUE;
4879
 
4880
  if (h->root.type == bfd_link_hash_warning)
4881
    h = (struct elf_link_hash_entry *) h->root.u.i.link;
4882
 
4883
  if (readonly_dynrelocs (h))
4884
    {
4885
      ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4886
 
4887
      /* Not an error, just cut short the traversal.  */
4888
      return FALSE;
4889
    }
4890
  return TRUE;
4891
}
4892
 
4893
/* Set the sizes of the dynamic sections.  */
4894
 
4895
static bfd_boolean
4896
ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4897
                               struct bfd_link_info *info)
4898
{
4899
  struct ppc_elf_link_hash_table *htab;
4900
  asection *s;
4901
  bfd_boolean relocs;
4902
  bfd *ibfd;
4903
 
4904
#ifdef DEBUG
4905
  fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4906
#endif
4907
 
4908
  htab = ppc_elf_hash_table (info);
4909
  BFD_ASSERT (htab->elf.dynobj != NULL);
4910
 
4911
  if (elf_hash_table (info)->dynamic_sections_created)
4912
    {
4913
      /* Set the contents of the .interp section to the interpreter.  */
4914
      if (info->executable)
4915
        {
4916
          s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4917
          BFD_ASSERT (s != NULL);
4918
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4919
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4920
        }
4921
    }
4922
 
4923
  if (htab->plt_type == PLT_OLD)
4924
    htab->got_header_size = 16;
4925
  else if (htab->plt_type == PLT_NEW)
4926
    htab->got_header_size = 12;
4927
 
4928
  /* Set up .got offsets for local syms, and space for local dynamic
4929
     relocs.  */
4930
  for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4931
    {
4932
      bfd_signed_vma *local_got;
4933
      bfd_signed_vma *end_local_got;
4934
      char *lgot_masks;
4935
      bfd_size_type locsymcount;
4936
      Elf_Internal_Shdr *symtab_hdr;
4937
 
4938
      if (!is_ppc_elf (ibfd))
4939
        continue;
4940
 
4941
      for (s = ibfd->sections; s != NULL; s = s->next)
4942
        {
4943
          struct ppc_elf_dyn_relocs *p;
4944
 
4945
          for (p = ((struct ppc_elf_dyn_relocs *)
4946
                    elf_section_data (s)->local_dynrel);
4947
               p != NULL;
4948
               p = p->next)
4949
            {
4950
              if (!bfd_is_abs_section (p->sec)
4951
                  && bfd_is_abs_section (p->sec->output_section))
4952
                {
4953
                  /* Input section has been discarded, either because
4954
                     it is a copy of a linkonce section or due to
4955
                     linker script /DISCARD/, so we'll be discarding
4956
                     the relocs too.  */
4957
                }
4958
              else if (p->count != 0)
4959
                {
4960
                  elf_section_data (p->sec)->sreloc->size
4961
                    += p->count * sizeof (Elf32_External_Rela);
4962
                  if ((p->sec->output_section->flags
4963
                       & (SEC_READONLY | SEC_ALLOC))
4964
                      == (SEC_READONLY | SEC_ALLOC))
4965
                    info->flags |= DF_TEXTREL;
4966
                }
4967
            }
4968
        }
4969
 
4970
      local_got = elf_local_got_refcounts (ibfd);
4971
      if (!local_got)
4972
        continue;
4973
 
4974
      symtab_hdr = &elf_symtab_hdr (ibfd);
4975
      locsymcount = symtab_hdr->sh_info;
4976
      end_local_got = local_got + locsymcount;
4977
      lgot_masks = (char *) end_local_got;
4978
      for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4979
        if (*local_got > 0)
4980
          {
4981
            if (*lgot_masks == (TLS_TLS | TLS_LD))
4982
              {
4983
                /* If just an LD reloc, we'll just use
4984
                   htab->tlsld_got.offset.  */
4985
                htab->tlsld_got.refcount += 1;
4986
                *local_got = (bfd_vma) -1;
4987
              }
4988
            else
4989
              {
4990
                unsigned int need = 0;
4991
                if ((*lgot_masks & TLS_TLS) != 0)
4992
                  {
4993
                    if ((*lgot_masks & TLS_GD) != 0)
4994
                      need += 8;
4995
                    if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4996
                      need += 4;
4997
                    if ((*lgot_masks & TLS_DTPREL) != 0)
4998
                      need += 4;
4999
                  }
5000
                else
5001
                  need += 4;
5002
                *local_got = allocate_got (htab, need);
5003
                if (info->shared)
5004
                  htab->relgot->size += (need
5005
                                         * (sizeof (Elf32_External_Rela) / 4));
5006
              }
5007
          }
5008
        else
5009
          *local_got = (bfd_vma) -1;
5010
    }
5011
 
5012
  /* Allocate space for global sym dynamic relocs.  */
5013
  elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5014
 
5015
  if (htab->tlsld_got.refcount > 0)
5016
    {
5017
      htab->tlsld_got.offset = allocate_got (htab, 8);
5018
      if (info->shared)
5019
        htab->relgot->size += sizeof (Elf32_External_Rela);
5020
    }
5021
  else
5022
    htab->tlsld_got.offset = (bfd_vma) -1;
5023
 
5024
  if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5025
    {
5026
      unsigned int g_o_t = 32768;
5027
 
5028
      /* If we haven't allocated the header, do so now.  When we get here,
5029
         for old plt/got the got size will be 0 to 32764 (not allocated),
5030
         or 32780 to 65536 (header allocated).  For new plt/got, the
5031
         corresponding ranges are 0 to 32768 and 32780 to 65536.  */
5032
      if (htab->got->size <= 32768)
5033
        {
5034
          g_o_t = htab->got->size;
5035
          if (htab->plt_type == PLT_OLD)
5036
            g_o_t += 4;
5037
          htab->got->size += htab->got_header_size;
5038
        }
5039
 
5040
      htab->elf.hgot->root.u.def.value = g_o_t;
5041
    }
5042
 
5043
  if (htab->glink != NULL && htab->glink->size != 0)
5044
    {
5045
      htab->glink_pltresolve = htab->glink->size;
5046
      /* Space for the branch table.  */
5047
      htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5048
      /* Pad out to align the start of PLTresolve.  */
5049
      htab->glink->size += -htab->glink->size & 15;
5050
      htab->glink->size += GLINK_PLTRESOLVE;
5051
 
5052
      if (htab->emit_stub_syms)
5053
        {
5054
          struct elf_link_hash_entry *sh;
5055
          sh = elf_link_hash_lookup (&htab->elf, "__glink",
5056
                                     TRUE, FALSE, FALSE);
5057
          if (sh == NULL)
5058
            return FALSE;
5059
          if (sh->root.type == bfd_link_hash_new)
5060
            {
5061
              sh->root.type = bfd_link_hash_defined;
5062
              sh->root.u.def.section = htab->glink;
5063
              sh->root.u.def.value = htab->glink_pltresolve;
5064
              sh->ref_regular = 1;
5065
              sh->def_regular = 1;
5066
              sh->ref_regular_nonweak = 1;
5067
              sh->forced_local = 1;
5068
              sh->non_elf = 0;
5069
            }
5070
          sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5071
                                     TRUE, FALSE, FALSE);
5072
          if (sh == NULL)
5073
            return FALSE;
5074
          if (sh->root.type == bfd_link_hash_new)
5075
            {
5076
              sh->root.type = bfd_link_hash_defined;
5077
              sh->root.u.def.section = htab->glink;
5078
              sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5079
              sh->ref_regular = 1;
5080
              sh->def_regular = 1;
5081
              sh->ref_regular_nonweak = 1;
5082
              sh->forced_local = 1;
5083
              sh->non_elf = 0;
5084
            }
5085
        }
5086
    }
5087
 
5088
  /* We've now determined the sizes of the various dynamic sections.
5089
     Allocate memory for them.  */
5090
  relocs = FALSE;
5091
  for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5092
    {
5093
      bfd_boolean strip_section = TRUE;
5094
 
5095
      if ((s->flags & SEC_LINKER_CREATED) == 0)
5096
        continue;
5097
 
5098
      if (s == htab->plt
5099
          || s == htab->glink
5100
          || s == htab->got
5101
          || s == htab->sgotplt
5102
          || s == htab->sbss
5103
          || s == htab->dynbss
5104
          || s == htab->dynsbss)
5105
        {
5106
          /* We'd like to strip these sections if they aren't needed, but if
5107
             we've exported dynamic symbols from them we must leave them.
5108
             It's too late to tell BFD to get rid of the symbols.  */
5109
          if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5110
            strip_section = FALSE;
5111
          /* Strip this section if we don't need it; see the
5112
             comment below.  */
5113
        }
5114
      else if (s == htab->sdata[0].section
5115
               || s == htab->sdata[1].section)
5116
        {
5117
          /* Strip these too.  */
5118
        }
5119
      else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5120
        {
5121
          if (s->size != 0)
5122
            {
5123
              /* Remember whether there are any relocation sections.  */
5124
              relocs = TRUE;
5125
 
5126
              /* We use the reloc_count field as a counter if we need
5127
                 to copy relocs into the output file.  */
5128
              s->reloc_count = 0;
5129
            }
5130
        }
5131
      else
5132
        {
5133
          /* It's not one of our sections, so don't allocate space.  */
5134
          continue;
5135
        }
5136
 
5137
      if (s->size == 0 && strip_section)
5138
        {
5139
          /* If we don't need this section, strip it from the
5140
             output file.  This is mostly to handle .rela.bss and
5141
             .rela.plt.  We must create both sections in
5142
             create_dynamic_sections, because they must be created
5143
             before the linker maps input sections to output
5144
             sections.  The linker does that before
5145
             adjust_dynamic_symbol is called, and it is that
5146
             function which decides whether anything needs to go
5147
             into these sections.  */
5148
          s->flags |= SEC_EXCLUDE;
5149
          continue;
5150
        }
5151
 
5152
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
5153
        continue;
5154
 
5155
      /* Allocate memory for the section contents.  */
5156
      s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5157
      if (s->contents == NULL)
5158
        return FALSE;
5159
    }
5160
 
5161
  if (htab->elf.dynamic_sections_created)
5162
    {
5163
      /* Add some entries to the .dynamic section.  We fill in the
5164
         values later, in ppc_elf_finish_dynamic_sections, but we
5165
         must add the entries now so that we get the correct size for
5166
         the .dynamic section.  The DT_DEBUG entry is filled in by the
5167
         dynamic linker and used by the debugger.  */
5168
#define add_dynamic_entry(TAG, VAL) \
5169
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5170
 
5171
      if (info->executable)
5172
        {
5173
          if (!add_dynamic_entry (DT_DEBUG, 0))
5174
            return FALSE;
5175
        }
5176
 
5177
      if (htab->plt != NULL && htab->plt->size != 0)
5178
        {
5179
          if (!add_dynamic_entry (DT_PLTGOT, 0)
5180
              || !add_dynamic_entry (DT_PLTRELSZ, 0)
5181
              || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5182
              || !add_dynamic_entry (DT_JMPREL, 0))
5183
            return FALSE;
5184
        }
5185
 
5186
      if (htab->glink != NULL && htab->glink->size != 0)
5187
        {
5188
          if (!add_dynamic_entry (DT_PPC_GOT, 0))
5189
            return FALSE;
5190
        }
5191
 
5192
      if (relocs)
5193
        {
5194
          if (!add_dynamic_entry (DT_RELA, 0)
5195
              || !add_dynamic_entry (DT_RELASZ, 0)
5196
              || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5197
            return FALSE;
5198
        }
5199
 
5200
      /* If any dynamic relocs apply to a read-only section, then we
5201
         need a DT_TEXTREL entry.  */
5202
      if ((info->flags & DF_TEXTREL) == 0)
5203
        elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5204
                                info);
5205
 
5206
      if ((info->flags & DF_TEXTREL) != 0)
5207
        {
5208
          if (!add_dynamic_entry (DT_TEXTREL, 0))
5209
            return FALSE;
5210
        }
5211
      if (htab->is_vxworks
5212
          && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5213
        return FALSE;
5214
   }
5215
#undef add_dynamic_entry
5216
 
5217
  return TRUE;
5218
}
5219
 
5220
/* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
5221
 
5222
static bfd_boolean
5223
ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5224
{
5225
  if (h->plt.plist != NULL
5226
      && !h->def_regular
5227
      && (!h->pointer_equality_needed
5228
          || !h->ref_regular_nonweak))
5229
    return FALSE;
5230
 
5231
  return _bfd_elf_hash_symbol (h);
5232
}
5233
 
5234
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5235
 
5236
static const int shared_stub_entry[] =
5237
  {
5238
    0x7c0802a6, /* mflr 0 */
5239
    0x429f0005, /* bcl 20, 31, .Lxxx */
5240
    0x7d6802a6, /* mflr 11 */
5241
    0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5242
    0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5243
    0x7c0803a6, /* mtlr 0 */
5244
    0x7d6903a6, /* mtctr 11 */
5245
    0x4e800420, /* bctr */
5246
  };
5247
 
5248
static const int stub_entry[] =
5249
  {
5250
    0x3d600000, /* lis 11,xxx@ha */
5251
    0x396b0000, /* addi 11,11,xxx@l */
5252
    0x7d6903a6, /* mtctr 11 */
5253
    0x4e800420, /* bctr */
5254
  };
5255
 
5256
static bfd_boolean
5257
ppc_elf_relax_section (bfd *abfd,
5258
                       asection *isec,
5259
                       struct bfd_link_info *link_info,
5260
                       bfd_boolean *again)
5261
{
5262
  struct one_fixup
5263
  {
5264
    struct one_fixup *next;
5265
    asection *tsec;
5266
    bfd_vma toff;
5267
    bfd_vma trampoff;
5268
  };
5269
 
5270
  Elf_Internal_Shdr *symtab_hdr;
5271
  bfd_byte *contents = NULL;
5272
  Elf_Internal_Sym *isymbuf = NULL;
5273
  Elf_Internal_Rela *internal_relocs = NULL;
5274
  Elf_Internal_Rela *irel, *irelend;
5275
  struct one_fixup *fixups = NULL;
5276
  bfd_boolean changed;
5277
  struct ppc_elf_link_hash_table *htab;
5278
  bfd_size_type trampoff;
5279
  asection *got2;
5280
 
5281
  *again = FALSE;
5282
 
5283
  /* Nothing to do if there are no relocations, and no need to do
5284
     anything with non-alloc sections.  */
5285
  if ((isec->flags & SEC_ALLOC) == 0
5286
      || (isec->flags & SEC_RELOC) == 0
5287
      || isec->reloc_count == 0)
5288
    return TRUE;
5289
 
5290
  trampoff = (isec->size + 3) & (bfd_vma) -4;
5291
  /* Space for a branch around any trampolines.  */
5292
  trampoff += 4;
5293
 
5294
  symtab_hdr = &elf_symtab_hdr (abfd);
5295
 
5296
  /* Get a copy of the native relocations.  */
5297
  internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5298
                                               link_info->keep_memory);
5299
  if (internal_relocs == NULL)
5300
    goto error_return;
5301
 
5302
  htab = ppc_elf_hash_table (link_info);
5303
  got2 = bfd_get_section_by_name (abfd, ".got2");
5304
 
5305
  irelend = internal_relocs + isec->reloc_count;
5306
  for (irel = internal_relocs; irel < irelend; irel++)
5307
    {
5308
      unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5309
      bfd_vma symaddr, reladdr, toff, roff;
5310
      asection *tsec;
5311
      struct one_fixup *f;
5312
      size_t insn_offset = 0;
5313
      bfd_vma max_branch_offset, val;
5314
      bfd_byte *hit_addr;
5315
      unsigned long t0;
5316
      unsigned char sym_type;
5317
 
5318
      switch (r_type)
5319
        {
5320
        case R_PPC_REL24:
5321
        case R_PPC_LOCAL24PC:
5322
        case R_PPC_PLTREL24:
5323
          max_branch_offset = 1 << 25;
5324
          break;
5325
 
5326
        case R_PPC_REL14:
5327
        case R_PPC_REL14_BRTAKEN:
5328
        case R_PPC_REL14_BRNTAKEN:
5329
          max_branch_offset = 1 << 15;
5330
          break;
5331
 
5332
        default:
5333
          continue;
5334
        }
5335
 
5336
      /* Get the value of the symbol referred to by the reloc.  */
5337
      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5338
        {
5339
          /* A local symbol.  */
5340
          Elf_Internal_Sym *isym;
5341
 
5342
          /* Read this BFD's local symbols.  */
5343
          if (isymbuf == NULL)
5344
            {
5345
              isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5346
              if (isymbuf == NULL)
5347
                isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5348
                                                symtab_hdr->sh_info, 0,
5349
                                                NULL, NULL, NULL);
5350
              if (isymbuf == 0)
5351
                goto error_return;
5352
            }
5353
          isym = isymbuf + ELF32_R_SYM (irel->r_info);
5354
          if (isym->st_shndx == SHN_UNDEF)
5355
            continue;   /* We can't do anything with undefined symbols.  */
5356
          else if (isym->st_shndx == SHN_ABS)
5357
            tsec = bfd_abs_section_ptr;
5358
          else if (isym->st_shndx == SHN_COMMON)
5359
            tsec = bfd_com_section_ptr;
5360
          else
5361
            tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5362
 
5363
          toff = isym->st_value;
5364
          sym_type = ELF_ST_TYPE (isym->st_info);
5365
        }
5366
      else
5367
        {
5368
          /* Global symbol handling.  */
5369
          unsigned long indx;
5370
          struct elf_link_hash_entry *h;
5371
 
5372
          indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5373
          h = elf_sym_hashes (abfd)[indx];
5374
 
5375
          while (h->root.type == bfd_link_hash_indirect
5376
                 || h->root.type == bfd_link_hash_warning)
5377
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
5378
 
5379
          tsec = NULL;
5380
          toff = 0;
5381
          if (r_type == R_PPC_PLTREL24
5382
              && htab->plt != NULL)
5383
            {
5384
              struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5385
 
5386
              if (ent != NULL)
5387
                {
5388
                  if (htab->plt_type == PLT_NEW)
5389
                    {
5390
                      tsec = htab->glink;
5391
                      toff = ent->glink_offset;
5392
                    }
5393
                  else
5394
                    {
5395
                      tsec = htab->plt;
5396
                      toff = ent->plt.offset;
5397
                    }
5398
                }
5399
            }
5400
          if (tsec != NULL)
5401
            ;
5402
          else if (h->root.type == bfd_link_hash_defined
5403
                   || h->root.type == bfd_link_hash_defweak)
5404
            {
5405
              tsec = h->root.u.def.section;
5406
              toff = h->root.u.def.value;
5407
            }
5408
          else
5409
            continue;
5410
 
5411
          sym_type = h->type;
5412
        }
5413
 
5414
      /* If the branch and target are in the same section, you have
5415
         no hope of adding stubs.  We'll error out later should the
5416
         branch overflow.  */
5417
      if (tsec == isec)
5418
        continue;
5419
 
5420
      /* There probably isn't any reason to handle symbols in
5421
         SEC_MERGE sections;  SEC_MERGE doesn't seem a likely
5422
         attribute for a code section, and we are only looking at
5423
         branches.  However, implement it correctly here as a
5424
         reference for other target relax_section functions.  */
5425
      if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5426
        {
5427
          /* At this stage in linking, no SEC_MERGE symbol has been
5428
             adjusted, so all references to such symbols need to be
5429
             passed through _bfd_merged_section_offset.  (Later, in
5430
             relocate_section, all SEC_MERGE symbols *except* for
5431
             section symbols have been adjusted.)
5432
 
5433
             gas may reduce relocations against symbols in SEC_MERGE
5434
             sections to a relocation against the section symbol when
5435
             the original addend was zero.  When the reloc is against
5436
             a section symbol we should include the addend in the
5437
             offset passed to _bfd_merged_section_offset, since the
5438
             location of interest is the original symbol.  On the
5439
             other hand, an access to "sym+addend" where "sym" is not
5440
             a section symbol should not include the addend;  Such an
5441
             access is presumed to be an offset from "sym";  The
5442
             location of interest is just "sym".  */
5443
          if (sym_type == STT_SECTION)
5444
            toff += irel->r_addend;
5445
 
5446
          toff = _bfd_merged_section_offset (abfd, &tsec,
5447
                                             elf_section_data (tsec)->sec_info,
5448
                                             toff);
5449
 
5450
          if (sym_type != STT_SECTION)
5451
            toff += irel->r_addend;
5452
        }
5453
      /* PLTREL24 addends are special.  */
5454
      else if (r_type != R_PPC_PLTREL24)
5455
        toff += irel->r_addend;
5456
 
5457
      /* Attempted -shared link of non-pic code loses.  */
5458
      if (tsec->output_section == NULL)
5459
        continue;
5460
 
5461
      symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5462
 
5463
      roff = irel->r_offset;
5464
      reladdr = isec->output_section->vma + isec->output_offset + roff;
5465
 
5466
      /* If the branch is in range, no need to do anything.  */
5467
      if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5468
        continue;
5469
 
5470
      /* Look for an existing fixup to this address.  */
5471
      for (f = fixups; f ; f = f->next)
5472
        if (f->tsec == tsec && f->toff == toff)
5473
          break;
5474
 
5475
      if (f == NULL)
5476
        {
5477
          size_t size;
5478
          unsigned long stub_rtype;
5479
 
5480
          val = trampoff - roff;
5481
          if (val >= max_branch_offset)
5482
            /* Oh dear, we can't reach a trampoline.  Don't try to add
5483
               one.  We'll report an error later.  */
5484
            continue;
5485
 
5486
          if (link_info->shared)
5487
            {
5488
              size = 4 * ARRAY_SIZE (shared_stub_entry);
5489
              insn_offset = 12;
5490
              stub_rtype = R_PPC_RELAX32PC;
5491
            }
5492
          else
5493
            {
5494
              size = 4 * ARRAY_SIZE (stub_entry);
5495
              insn_offset = 0;
5496
              stub_rtype = R_PPC_RELAX32;
5497
            }
5498
 
5499
          if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5500
              != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5501
            abort ();
5502
          if (tsec == htab->plt
5503
              || tsec == htab->glink)
5504
            stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5505
 
5506
          /* Hijack the old relocation.  Since we need two
5507
             relocations for this use a "composite" reloc.  */
5508
          irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5509
                                       stub_rtype);
5510
          irel->r_offset = trampoff + insn_offset;
5511
 
5512
          /* Record the fixup so we don't do it again this section.  */
5513
          f = bfd_malloc (sizeof (*f));
5514
          f->next = fixups;
5515
          f->tsec = tsec;
5516
          f->toff = toff;
5517
          f->trampoff = trampoff;
5518
          fixups = f;
5519
 
5520
          trampoff += size;
5521
        }
5522
      else
5523
        {
5524
          val = f->trampoff - roff;
5525
          if (val >= max_branch_offset)
5526
            continue;
5527
 
5528
          /* Nop out the reloc, since we're finalizing things here.  */
5529
          irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5530
        }
5531
 
5532
      /* Get the section contents.  */
5533
      if (contents == NULL)
5534
        {
5535
          /* Get cached copy if it exists.  */
5536
          if (elf_section_data (isec)->this_hdr.contents != NULL)
5537
            contents = elf_section_data (isec)->this_hdr.contents;
5538
          else
5539
            {
5540
              /* Go get them off disk.  */
5541
              if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5542
                goto error_return;
5543
            }
5544
        }
5545
 
5546
      /* Fix up the existing branch to hit the trampoline.  */
5547
      hit_addr = contents + roff;
5548
      switch (r_type)
5549
        {
5550
        case R_PPC_REL24:
5551
        case R_PPC_LOCAL24PC:
5552
        case R_PPC_PLTREL24:
5553
          t0 = bfd_get_32 (abfd, hit_addr);
5554
          t0 &= ~0x3fffffc;
5555
          t0 |= val & 0x3fffffc;
5556
          bfd_put_32 (abfd, t0, hit_addr);
5557
          break;
5558
 
5559
        case R_PPC_REL14:
5560
        case R_PPC_REL14_BRTAKEN:
5561
        case R_PPC_REL14_BRNTAKEN:
5562
          t0 = bfd_get_32 (abfd, hit_addr);
5563
          t0 &= ~0xfffc;
5564
          t0 |= val & 0xfffc;
5565
          bfd_put_32 (abfd, t0, hit_addr);
5566
          break;
5567
        }
5568
    }
5569
 
5570
  /* Write out the trampolines.  */
5571
  changed = fixups != NULL;
5572
  if (fixups != NULL)
5573
    {
5574
      const int *stub;
5575
      bfd_byte *dest;
5576
      bfd_vma val;
5577
      int i, size;
5578
 
5579
      do
5580
        {
5581
          struct one_fixup *f = fixups;
5582
          fixups = fixups->next;
5583
          free (f);
5584
        }
5585
      while (fixups);
5586
 
5587
      contents = bfd_realloc_or_free (contents, trampoff);
5588
      if (contents == NULL)
5589
        goto error_return;
5590
 
5591
      isec->size = (isec->size + 3) & (bfd_vma) -4;
5592
      /* Branch around the trampolines.  */
5593
      val = trampoff - isec->size + 0x48000000;
5594
      dest = contents + isec->size;
5595
      isec->size = trampoff;
5596
      bfd_put_32 (abfd, val, dest);
5597
      dest += 4;
5598
 
5599
      if (link_info->shared)
5600
        {
5601
          stub = shared_stub_entry;
5602
          size = ARRAY_SIZE (shared_stub_entry);
5603
        }
5604
      else
5605
        {
5606
          stub = stub_entry;
5607
          size = ARRAY_SIZE (stub_entry);
5608
        }
5609
 
5610
      i = 0;
5611
      while (dest < contents + trampoff)
5612
        {
5613
          bfd_put_32 (abfd, stub[i], dest);
5614
          i++;
5615
          if (i == size)
5616
            i = 0;
5617
          dest += 4;
5618
        }
5619
      BFD_ASSERT (i == 0);
5620
    }
5621
 
5622
  if (isymbuf != NULL
5623
      && symtab_hdr->contents != (unsigned char *) isymbuf)
5624
    {
5625
      if (! link_info->keep_memory)
5626
        free (isymbuf);
5627
      else
5628
        {
5629
          /* Cache the symbols for elf_link_input_bfd.  */
5630
          symtab_hdr->contents = (unsigned char *) isymbuf;
5631
        }
5632
    }
5633
 
5634
  if (contents != NULL
5635
      && elf_section_data (isec)->this_hdr.contents != contents)
5636
    {
5637
      if (!changed && !link_info->keep_memory)
5638
        free (contents);
5639
      else
5640
        {
5641
          /* Cache the section contents for elf_link_input_bfd.  */
5642
          elf_section_data (isec)->this_hdr.contents = contents;
5643
        }
5644
    }
5645
 
5646
  if (elf_section_data (isec)->relocs != internal_relocs)
5647
    {
5648
      if (!changed)
5649
        free (internal_relocs);
5650
      else
5651
        elf_section_data (isec)->relocs = internal_relocs;
5652
    }
5653
 
5654
  *again = changed;
5655
  return TRUE;
5656
 
5657
 error_return:
5658
  if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5659
    free (isymbuf);
5660
  if (contents != NULL
5661
      && elf_section_data (isec)->this_hdr.contents != contents)
5662
    free (contents);
5663
  if (internal_relocs != NULL
5664
      && elf_section_data (isec)->relocs != internal_relocs)
5665
    free (internal_relocs);
5666
  return FALSE;
5667
}
5668
 
5669
/* What to do when ld finds relocations against symbols defined in
5670
   discarded sections.  */
5671
 
5672
static unsigned int
5673
ppc_elf_action_discarded (asection *sec)
5674
{
5675
  if (strcmp (".fixup", sec->name) == 0)
5676
    return 0;
5677
 
5678
  if (strcmp (".got2", sec->name) == 0)
5679
    return 0;
5680
 
5681
  return _bfd_elf_default_action_discarded (sec);
5682
}
5683
 
5684
/* Fill in the address for a pointer generated in a linker section.  */
5685
 
5686
static bfd_vma
5687
elf_finish_pointer_linker_section (bfd *input_bfd,
5688
                                   elf_linker_section_t *lsect,
5689
                                   struct elf_link_hash_entry *h,
5690
                                   bfd_vma relocation,
5691
                                   const Elf_Internal_Rela *rel)
5692
{
5693
  elf_linker_section_pointers_t *linker_section_ptr;
5694
 
5695
  BFD_ASSERT (lsect != NULL);
5696
 
5697
  if (h != NULL)
5698
    {
5699
      /* Handle global symbol.  */
5700
      struct ppc_elf_link_hash_entry *eh;
5701
 
5702
      eh = (struct ppc_elf_link_hash_entry *) h;
5703
      BFD_ASSERT (eh->elf.def_regular);
5704
      linker_section_ptr = eh->linker_section_pointer;
5705
    }
5706
  else
5707
    {
5708
      /* Handle local symbol.  */
5709
      unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5710
 
5711
      BFD_ASSERT (is_ppc_elf (input_bfd));
5712
      BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5713
      linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5714
    }
5715
 
5716
  linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5717
                                                        rel->r_addend,
5718
                                                        lsect);
5719
  BFD_ASSERT (linker_section_ptr != NULL);
5720
 
5721
  /* Offset will always be a multiple of four, so use the bottom bit
5722
     as a "written" flag.  */
5723
  if ((linker_section_ptr->offset & 1) == 0)
5724
    {
5725
      bfd_put_32 (lsect->section->owner,
5726
                  relocation + linker_section_ptr->addend,
5727
                  lsect->section->contents + linker_section_ptr->offset);
5728
      linker_section_ptr->offset += 1;
5729
    }
5730
 
5731
  relocation = (lsect->section->output_offset
5732
                + linker_section_ptr->offset - 1
5733
                - 0x8000);
5734
 
5735
#ifdef DEBUG
5736
  fprintf (stderr,
5737
           "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5738
           lsect->name, (long) relocation, (long) relocation);
5739
#endif
5740
 
5741
  /* Subtract out the addend, because it will get added back in by the normal
5742
     processing.  */
5743
  return relocation - linker_section_ptr->addend;
5744
}
5745
 
5746
/* The RELOCATE_SECTION function is called by the ELF backend linker
5747
   to handle the relocations for a section.
5748
 
5749
   The relocs are always passed as Rela structures; if the section
5750
   actually uses Rel structures, the r_addend field will always be
5751
   zero.
5752
 
5753
   This function is responsible for adjust the section contents as
5754
   necessary, and (if using Rela relocs and generating a
5755
   relocatable output file) adjusting the reloc addend as
5756
   necessary.
5757
 
5758
   This function does not have to worry about setting the reloc
5759
   address or the reloc symbol index.
5760
 
5761
   LOCAL_SYMS is a pointer to the swapped in local symbols.
5762
 
5763
   LOCAL_SECTIONS is an array giving the section in the input file
5764
   corresponding to the st_shndx field of each local symbol.
5765
 
5766
   The global hash table entry for the global symbols can be found
5767
   via elf_sym_hashes (input_bfd).
5768
 
5769
   When generating relocatable output, this function must handle
5770
   STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
5771
   going to be the section symbol corresponding to the output
5772
   section, which means that the addend must be adjusted
5773
   accordingly.  */
5774
 
5775
static bfd_boolean
5776
ppc_elf_relocate_section (bfd *output_bfd,
5777
                          struct bfd_link_info *info,
5778
                          bfd *input_bfd,
5779
                          asection *input_section,
5780
                          bfd_byte *contents,
5781
                          Elf_Internal_Rela *relocs,
5782
                          Elf_Internal_Sym *local_syms,
5783
                          asection **local_sections)
5784
{
5785
  Elf_Internal_Shdr *symtab_hdr;
5786
  struct elf_link_hash_entry **sym_hashes;
5787
  struct ppc_elf_link_hash_table *htab;
5788
  Elf_Internal_Rela *rel;
5789
  Elf_Internal_Rela *relend;
5790
  Elf_Internal_Rela outrel;
5791
  bfd_byte *loc;
5792
  asection *got2, *sreloc = NULL;
5793
  bfd_vma *local_got_offsets;
5794
  bfd_boolean ret = TRUE;
5795
  bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5796
 
5797
#ifdef DEBUG
5798
  _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5799
                      "%ld relocations%s",
5800
                      input_bfd, input_section,
5801
                      (long) input_section->reloc_count,
5802
                      (info->relocatable) ? " (relocatable)" : "");
5803
#endif
5804
 
5805
  got2 = bfd_get_section_by_name (input_bfd, ".got2");
5806
 
5807
  /* Initialize howto table if not already done.  */
5808
  if (!ppc_elf_howto_table[R_PPC_ADDR32])
5809
    ppc_elf_howto_init ();
5810
 
5811
  htab = ppc_elf_hash_table (info);
5812
  local_got_offsets = elf_local_got_offsets (input_bfd);
5813
  symtab_hdr = &elf_symtab_hdr (input_bfd);
5814
  sym_hashes = elf_sym_hashes (input_bfd);
5815
  rel = relocs;
5816
  relend = relocs + input_section->reloc_count;
5817
  for (; rel < relend; rel++)
5818
    {
5819
      enum elf_ppc_reloc_type r_type;
5820
      bfd_vma addend;
5821
      bfd_reloc_status_type r;
5822
      Elf_Internal_Sym *sym;
5823
      asection *sec;
5824
      struct elf_link_hash_entry *h;
5825
      const char *sym_name;
5826
      reloc_howto_type *howto;
5827
      unsigned long r_symndx;
5828
      bfd_vma relocation;
5829
      bfd_vma branch_bit, insn, from;
5830
      bfd_boolean unresolved_reloc;
5831
      bfd_boolean warned;
5832
      unsigned int tls_type, tls_mask, tls_gd;
5833
 
5834
      r_type = ELF32_R_TYPE (rel->r_info);
5835
      sym = NULL;
5836
      sec = NULL;
5837
      h = NULL;
5838
      unresolved_reloc = FALSE;
5839
      warned = FALSE;
5840
      r_symndx = ELF32_R_SYM (rel->r_info);
5841
 
5842
      if (r_symndx < symtab_hdr->sh_info)
5843
        {
5844
          sym = local_syms + r_symndx;
5845
          sec = local_sections[r_symndx];
5846
          sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5847
 
5848
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5849
        }
5850
      else
5851
        {
5852
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5853
                                   r_symndx, symtab_hdr, sym_hashes,
5854
                                   h, sec, relocation,
5855
                                   unresolved_reloc, warned);
5856
 
5857
          sym_name = h->root.root.string;
5858
        }
5859
 
5860
      if (sec != NULL && elf_discarded_section (sec))
5861
        {
5862
          /* For relocs against symbols from removed linkonce sections,
5863
             or sections discarded by a linker script, we just want the
5864
             section contents zeroed.  Avoid any special processing.  */
5865
          howto = NULL;
5866
          if (r_type < R_PPC_max)
5867
            howto = ppc_elf_howto_table[r_type];
5868
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5869
          rel->r_info = 0;
5870
          rel->r_addend = 0;
5871
          continue;
5872
        }
5873
 
5874
      if (info->relocatable)
5875
        {
5876
          if (got2 != NULL
5877
              && r_type == R_PPC_PLTREL24
5878
              && rel->r_addend >= 32768)
5879
            {
5880
              /* R_PPC_PLTREL24 is rather special.  If non-zero, the
5881
                 addend specifies the GOT pointer offset within .got2.  */
5882
              rel->r_addend += got2->output_offset;
5883
            }
5884
          continue;
5885
        }
5886
 
5887
      /* TLS optimizations.  Replace instruction sequences and relocs
5888
         based on information we collected in tls_optimize.  We edit
5889
         RELOCS so that --emit-relocs will output something sensible
5890
         for the final instruction stream.  */
5891
      tls_mask = 0;
5892
      tls_gd = 0;
5893
      if (IS_PPC_TLS_RELOC (r_type))
5894
        {
5895
          if (h != NULL)
5896
            tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5897
          else if (local_got_offsets != NULL)
5898
            {
5899
              char *lgot_masks;
5900
              lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5901
              tls_mask = lgot_masks[r_symndx];
5902
            }
5903
        }
5904
 
5905
      /* Ensure reloc mapping code below stays sane.  */
5906
      if ((R_PPC_GOT_TLSLD16 & 3)    != (R_PPC_GOT_TLSGD16 & 3)
5907
          || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5908
          || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5909
          || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5910
          || (R_PPC_GOT_TLSLD16 & 3)    != (R_PPC_GOT_TPREL16 & 3)
5911
          || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5912
          || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5913
          || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5914
        abort ();
5915
      switch (r_type)
5916
        {
5917
        default:
5918
          break;
5919
 
5920
        case R_PPC_GOT_TPREL16:
5921
        case R_PPC_GOT_TPREL16_LO:
5922
          if (tls_mask != 0
5923
              && (tls_mask & TLS_TPREL) == 0)
5924
            {
5925
              bfd_vma insn;
5926
              insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5927
              insn &= 31 << 21;
5928
              insn |= 0x3c020000;       /* addis 0,2,0 */
5929
              bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5930
              r_type = R_PPC_TPREL16_HA;
5931
              rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5932
            }
5933
          break;
5934
 
5935
        case R_PPC_TLS:
5936
          if (tls_mask != 0
5937
              && (tls_mask & TLS_TPREL) == 0)
5938
            {
5939
              bfd_vma insn, rtra;
5940
              insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5941
              if ((insn & ((31 << 26) | (31 << 11)))
5942
                  == ((31 << 26) | (2 << 11)))
5943
                rtra = insn & ((1 << 26) - (1 << 16));
5944
              else if ((insn & ((31 << 26) | (31 << 16)))
5945
                       == ((31 << 26) | (2 << 16)))
5946
                rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5947
              else
5948
                abort ();
5949
              if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5950
                /* add -> addi.  */
5951
                insn = 14 << 26;
5952
              else if ((insn & (31 << 1)) == 23 << 1
5953
                       && ((insn & (31 << 6)) < 14 << 6
5954
                           || ((insn & (31 << 6)) >= 16 << 6
5955
                               && (insn & (31 << 6)) < 24 << 6)))
5956
                /* load and store indexed -> dform.  */
5957
                insn = (32 | ((insn >> 6) & 31)) << 26;
5958
              else if ((insn & (31 << 1)) == 21 << 1
5959
                       && (insn & (0x1a << 6)) == 0)
5960
                /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu.  */
5961
                insn = (((58 | ((insn >> 6) & 4)) << 26)
5962
                        | ((insn >> 6) & 1));
5963
              else if ((insn & (31 << 1)) == 21 << 1
5964
                       && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5965
                /* lwax -> lwa.  */
5966
                insn = (58 << 26) | 2;
5967
              else
5968
                abort ();
5969
              insn |= rtra;
5970
              bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5971
              r_type = R_PPC_TPREL16_LO;
5972
              rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5973
 
5974
              /* Was PPC_TLS which sits on insn boundary, now
5975
                 PPC_TPREL16_LO which is at low-order half-word.  */
5976
              rel->r_offset += d_offset;
5977
            }
5978
          break;
5979
 
5980
        case R_PPC_GOT_TLSGD16_HI:
5981
        case R_PPC_GOT_TLSGD16_HA:
5982
          tls_gd = TLS_TPRELGD;
5983
          if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5984
            goto tls_gdld_hi;
5985
          break;
5986
 
5987
        case R_PPC_GOT_TLSLD16_HI:
5988
        case R_PPC_GOT_TLSLD16_HA:
5989
          if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5990
            {
5991
            tls_gdld_hi:
5992
              if ((tls_mask & tls_gd) != 0)
5993
                r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5994
                          + R_PPC_GOT_TPREL16);
5995
              else
5996
                {
5997
                  bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5998
                  rel->r_offset -= d_offset;
5999
                  r_type = R_PPC_NONE;
6000
                }
6001
              rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6002
            }
6003
          break;
6004
 
6005
        case R_PPC_GOT_TLSGD16:
6006
        case R_PPC_GOT_TLSGD16_LO:
6007
          tls_gd = TLS_TPRELGD;
6008
          if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6009
            goto tls_ldgd_opt;
6010
          break;
6011
 
6012
        case R_PPC_GOT_TLSLD16:
6013
        case R_PPC_GOT_TLSLD16_LO:
6014
          if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6015
            {
6016
              bfd_vma insn1, insn2;
6017
              bfd_vma offset;
6018
 
6019
            tls_ldgd_opt:
6020
              offset = rel[1].r_offset;
6021
              insn1 = bfd_get_32 (output_bfd,
6022
                                  contents + rel->r_offset - d_offset);
6023
              if ((tls_mask & tls_gd) != 0)
6024
                {
6025
                  /* IE */
6026
                  insn1 &= (1 << 26) - 1;
6027
                  insn1 |= 32 << 26;    /* lwz */
6028
                  insn2 = 0x7c631214;   /* add 3,3,2 */
6029
                  rel[1].r_info
6030
                    = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6031
                  rel[1].r_addend = 0;
6032
                  r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6033
                            + R_PPC_GOT_TPREL16);
6034
                  rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6035
                }
6036
              else
6037
                {
6038
                  /* LE */
6039
                  insn1 = 0x3c620000;   /* addis 3,2,0 */
6040
                  insn2 = 0x38630000;   /* addi 3,3,0 */
6041
                  if (tls_gd == 0)
6042
                    {
6043
                      /* Was an LD reloc.  */
6044
                      r_symndx = 0;
6045
                      rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6046
                    }
6047
                  r_type = R_PPC_TPREL16_HA;
6048
                  rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6049
                  rel[1].r_info = ELF32_R_INFO (r_symndx,
6050
                                                R_PPC_TPREL16_LO);
6051
                  rel[1].r_offset += d_offset;
6052
                  rel[1].r_addend = rel->r_addend;
6053
                }
6054
              bfd_put_32 (output_bfd, insn1,
6055
                          contents + rel->r_offset - d_offset);
6056
              bfd_put_32 (output_bfd, insn2, contents + offset);
6057
              if (tls_gd == 0)
6058
                {
6059
                  /* We changed the symbol on an LD reloc.  Start over
6060
                     in order to get h, sym, sec etc. right.  */
6061
                  rel--;
6062
                  continue;
6063
                }
6064
            }
6065
          break;
6066
        }
6067
 
6068
      /* Handle other relocations that tweak non-addend part of insn.  */
6069
      branch_bit = 0;
6070
      switch (r_type)
6071
        {
6072
        default:
6073
          break;
6074
 
6075
          /* Branch taken prediction relocations.  */
6076
        case R_PPC_ADDR14_BRTAKEN:
6077
        case R_PPC_REL14_BRTAKEN:
6078
          branch_bit = BRANCH_PREDICT_BIT;
6079
          /* Fall thru */
6080
 
6081
          /* Branch not taken prediction relocations.  */
6082
        case R_PPC_ADDR14_BRNTAKEN:
6083
        case R_PPC_REL14_BRNTAKEN:
6084
          insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6085
          insn &= ~BRANCH_PREDICT_BIT;
6086
          insn |= branch_bit;
6087
 
6088
          from = (rel->r_offset
6089
                  + input_section->output_offset
6090
                  + input_section->output_section->vma);
6091
 
6092
          /* Invert 'y' bit if not the default.  */
6093
          if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6094
            insn ^= BRANCH_PREDICT_BIT;
6095
 
6096
          bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6097
          break;
6098
        }
6099
 
6100
      addend = rel->r_addend;
6101
      tls_type = 0;
6102
      howto = NULL;
6103
      if (r_type < R_PPC_max)
6104
        howto = ppc_elf_howto_table[r_type];
6105
      switch (r_type)
6106
        {
6107
        default:
6108
          (*_bfd_error_handler)
6109
            (_("%B: unknown relocation type %d for symbol %s"),
6110
             input_bfd, (int) r_type, sym_name);
6111
 
6112
          bfd_set_error (bfd_error_bad_value);
6113
          ret = FALSE;
6114
          continue;
6115
 
6116
        case R_PPC_NONE:
6117
        case R_PPC_TLS:
6118
        case R_PPC_EMB_MRKREF:
6119
        case R_PPC_GNU_VTINHERIT:
6120
        case R_PPC_GNU_VTENTRY:
6121
          continue;
6122
 
6123
          /* GOT16 relocations.  Like an ADDR16 using the symbol's
6124
             address in the GOT as relocation value instead of the
6125
             symbol's value itself.  Also, create a GOT entry for the
6126
             symbol and put the symbol value there.  */
6127
        case R_PPC_GOT_TLSGD16:
6128
        case R_PPC_GOT_TLSGD16_LO:
6129
        case R_PPC_GOT_TLSGD16_HI:
6130
        case R_PPC_GOT_TLSGD16_HA:
6131
          tls_type = TLS_TLS | TLS_GD;
6132
          goto dogot;
6133
 
6134
        case R_PPC_GOT_TLSLD16:
6135
        case R_PPC_GOT_TLSLD16_LO:
6136
        case R_PPC_GOT_TLSLD16_HI:
6137
        case R_PPC_GOT_TLSLD16_HA:
6138
          tls_type = TLS_TLS | TLS_LD;
6139
          goto dogot;
6140
 
6141
        case R_PPC_GOT_TPREL16:
6142
        case R_PPC_GOT_TPREL16_LO:
6143
        case R_PPC_GOT_TPREL16_HI:
6144
        case R_PPC_GOT_TPREL16_HA:
6145
          tls_type = TLS_TLS | TLS_TPREL;
6146
          goto dogot;
6147
 
6148
        case R_PPC_GOT_DTPREL16:
6149
        case R_PPC_GOT_DTPREL16_LO:
6150
        case R_PPC_GOT_DTPREL16_HI:
6151
        case R_PPC_GOT_DTPREL16_HA:
6152
          tls_type = TLS_TLS | TLS_DTPREL;
6153
          goto dogot;
6154
 
6155
        case R_PPC_GOT16:
6156
        case R_PPC_GOT16_LO:
6157
        case R_PPC_GOT16_HI:
6158
        case R_PPC_GOT16_HA:
6159
        dogot:
6160
          {
6161
            /* Relocation is to the entry for this symbol in the global
6162
               offset table.  */
6163
            bfd_vma off;
6164
            bfd_vma *offp;
6165
            unsigned long indx;
6166
 
6167
            if (htab->got == NULL)
6168
              abort ();
6169
 
6170
            indx = 0;
6171
            if (tls_type == (TLS_TLS | TLS_LD)
6172
                && (h == NULL
6173
                    || !h->def_dynamic))
6174
              offp = &htab->tlsld_got.offset;
6175
            else if (h != NULL)
6176
              {
6177
                bfd_boolean dyn;
6178
                dyn = htab->elf.dynamic_sections_created;
6179
                if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6180
                    || (info->shared
6181
                        && SYMBOL_REFERENCES_LOCAL (info, h)))
6182
                  /* This is actually a static link, or it is a
6183
                     -Bsymbolic link and the symbol is defined
6184
                     locally, or the symbol was forced to be local
6185
                     because of a version file.  */
6186
                  ;
6187
                else
6188
                  {
6189
                    indx = h->dynindx;
6190
                    unresolved_reloc = FALSE;
6191
                  }
6192
                offp = &h->got.offset;
6193
              }
6194
            else
6195
              {
6196
                if (local_got_offsets == NULL)
6197
                  abort ();
6198
                offp = &local_got_offsets[r_symndx];
6199
              }
6200
 
6201
            /* The offset must always be a multiple of 4.  We use the
6202
               least significant bit to record whether we have already
6203
               processed this entry.  */
6204
            off = *offp;
6205
            if ((off & 1) != 0)
6206
              off &= ~1;
6207
            else
6208
              {
6209
                unsigned int tls_m = (tls_mask
6210
                                      & (TLS_LD | TLS_GD | TLS_DTPREL
6211
                                         | TLS_TPREL | TLS_TPRELGD));
6212
 
6213
                if (offp == &htab->tlsld_got.offset)
6214
                  tls_m = TLS_LD;
6215
                else if (h == NULL
6216
                         || !h->def_dynamic)
6217
                  tls_m &= ~TLS_LD;
6218
 
6219
                /* We might have multiple got entries for this sym.
6220
                   Initialize them all.  */
6221
                do
6222
                  {
6223
                    int tls_ty = 0;
6224
 
6225
                    if ((tls_m & TLS_LD) != 0)
6226
                      {
6227
                        tls_ty = TLS_TLS | TLS_LD;
6228
                        tls_m &= ~TLS_LD;
6229
                      }
6230
                    else if ((tls_m & TLS_GD) != 0)
6231
                      {
6232
                        tls_ty = TLS_TLS | TLS_GD;
6233
                        tls_m &= ~TLS_GD;
6234
                      }
6235
                    else if ((tls_m & TLS_DTPREL) != 0)
6236
                      {
6237
                        tls_ty = TLS_TLS | TLS_DTPREL;
6238
                        tls_m &= ~TLS_DTPREL;
6239
                      }
6240
                    else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6241
                      {
6242
                        tls_ty = TLS_TLS | TLS_TPREL;
6243
                        tls_m = 0;
6244
                      }
6245
 
6246
                    /* Generate relocs for the dynamic linker.  */
6247
                    if ((info->shared || indx != 0)
6248
                        && (h == NULL
6249
                            || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6250
                            || h->root.type != bfd_link_hash_undefweak))
6251
                      {
6252
                        outrel.r_offset = (htab->got->output_section->vma
6253
                                           + htab->got->output_offset
6254
                                           + off);
6255
                        outrel.r_addend = 0;
6256
                        if (tls_ty & (TLS_LD | TLS_GD))
6257
                          {
6258
                            outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6259
                            if (tls_ty == (TLS_TLS | TLS_GD))
6260
                              {
6261
                                loc = htab->relgot->contents;
6262
                                loc += (htab->relgot->reloc_count++
6263
                                        * sizeof (Elf32_External_Rela));
6264
                                bfd_elf32_swap_reloca_out (output_bfd,
6265
                                                           &outrel, loc);
6266
                                outrel.r_offset += 4;
6267
                                outrel.r_info
6268
                                  = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6269
                              }
6270
                          }
6271
                        else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6272
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6273
                        else if (tls_ty == (TLS_TLS | TLS_TPREL))
6274
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6275
                        else if (indx == 0)
6276
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6277
                        else
6278
                          outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6279
                        if (indx == 0)
6280
                          {
6281
                            outrel.r_addend += relocation;
6282
                            if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6283
                              outrel.r_addend -= htab->elf.tls_sec->vma;
6284
                          }
6285
                        loc = htab->relgot->contents;
6286
                        loc += (htab->relgot->reloc_count++
6287
                                * sizeof (Elf32_External_Rela));
6288
                        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6289
                      }
6290
 
6291
                    /* Init the .got section contents if we're not
6292
                       emitting a reloc.  */
6293
                    else
6294
                      {
6295
                        bfd_vma value = relocation;
6296
 
6297
                        if (tls_ty == (TLS_TLS | TLS_LD))
6298
                          value = 1;
6299
                        else if (tls_ty != 0)
6300
                          {
6301
                            value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6302
                            if (tls_ty == (TLS_TLS | TLS_TPREL))
6303
                              value += DTP_OFFSET - TP_OFFSET;
6304
 
6305
                            if (tls_ty == (TLS_TLS | TLS_GD))
6306
                              {
6307
                                bfd_put_32 (output_bfd, value,
6308
                                            htab->got->contents + off + 4);
6309
                                value = 1;
6310
                              }
6311
                          }
6312
                        bfd_put_32 (output_bfd, value,
6313
                                    htab->got->contents + off);
6314
                      }
6315
 
6316
                    off += 4;
6317
                    if (tls_ty & (TLS_LD | TLS_GD))
6318
                      off += 4;
6319
                  }
6320
                while (tls_m != 0);
6321
 
6322
                off = *offp;
6323
                *offp = off | 1;
6324
              }
6325
 
6326
            if (off >= (bfd_vma) -2)
6327
              abort ();
6328
 
6329
            if ((tls_type & TLS_TLS) != 0)
6330
              {
6331
                if (tls_type != (TLS_TLS | TLS_LD))
6332
                  {
6333
                    if ((tls_mask & TLS_LD) != 0
6334
                        && !(h == NULL
6335
                             || !h->def_dynamic))
6336
                      off += 8;
6337
                    if (tls_type != (TLS_TLS | TLS_GD))
6338
                      {
6339
                        if ((tls_mask & TLS_GD) != 0)
6340
                          off += 8;
6341
                        if (tls_type != (TLS_TLS | TLS_DTPREL))
6342
                          {
6343
                            if ((tls_mask & TLS_DTPREL) != 0)
6344
                              off += 4;
6345
                          }
6346
                      }
6347
                  }
6348
              }
6349
 
6350
            relocation = htab->got->output_offset + off;
6351
            relocation -= htab->elf.hgot->root.u.def.value;
6352
 
6353
            /* Addends on got relocations don't make much sense.
6354
               x+off@got is actually x@got+off, and since the got is
6355
               generated by a hash table traversal, the value in the
6356
               got at entry m+n bears little relation to the entry m.  */
6357
            if (addend != 0)
6358
              (*_bfd_error_handler)
6359
                (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6360
                 input_bfd,
6361
                 input_section,
6362
                 (long) rel->r_offset,
6363
                 howto->name,
6364
                 sym_name);
6365
          }
6366
        break;
6367
 
6368
        /* Relocations that need no special processing.  */
6369
        case R_PPC_LOCAL24PC:
6370
          /* It makes no sense to point a local relocation
6371
             at a symbol not in this object.  */
6372
          if (unresolved_reloc)
6373
            {
6374
              if (! (*info->callbacks->undefined_symbol) (info,
6375
                                                          h->root.root.string,
6376
                                                          input_bfd,
6377
                                                          input_section,
6378
                                                          rel->r_offset,
6379
                                                          TRUE))
6380
                return FALSE;
6381
              continue;
6382
            }
6383
          break;
6384
 
6385
        case R_PPC_DTPREL16:
6386
        case R_PPC_DTPREL16_LO:
6387
        case R_PPC_DTPREL16_HI:
6388
        case R_PPC_DTPREL16_HA:
6389
          addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6390
          break;
6391
 
6392
          /* Relocations that may need to be propagated if this is a shared
6393
             object.  */
6394
        case R_PPC_TPREL16:
6395
        case R_PPC_TPREL16_LO:
6396
        case R_PPC_TPREL16_HI:
6397
        case R_PPC_TPREL16_HA:
6398
          addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6399
          /* The TPREL16 relocs shouldn't really be used in shared
6400
             libs as they will result in DT_TEXTREL being set, but
6401
             support them anyway.  */
6402
          goto dodyn;
6403
 
6404
        case R_PPC_TPREL32:
6405
          addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6406
          goto dodyn;
6407
 
6408
        case R_PPC_DTPREL32:
6409
          addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6410
          goto dodyn;
6411
 
6412
        case R_PPC_DTPMOD32:
6413
          relocation = 1;
6414
          addend = 0;
6415
          goto dodyn;
6416
 
6417
        case R_PPC_REL16:
6418
        case R_PPC_REL16_LO:
6419
        case R_PPC_REL16_HI:
6420
        case R_PPC_REL16_HA:
6421
          break;
6422
 
6423
        case R_PPC_REL32:
6424
          if (h == NULL || h == htab->elf.hgot)
6425
            break;
6426
          /* fall through */
6427
 
6428
        case R_PPC_ADDR32:
6429
        case R_PPC_ADDR16:
6430
        case R_PPC_ADDR16_LO:
6431
        case R_PPC_ADDR16_HI:
6432
        case R_PPC_ADDR16_HA:
6433
        case R_PPC_UADDR32:
6434
        case R_PPC_UADDR16:
6435
          goto dodyn;
6436
 
6437
        case R_PPC_REL24:
6438
        case R_PPC_REL14:
6439
        case R_PPC_REL14_BRTAKEN:
6440
        case R_PPC_REL14_BRNTAKEN:
6441
          /* If these relocations are not to a named symbol, they can be
6442
             handled right here, no need to bother the dynamic linker.  */
6443
          if (SYMBOL_REFERENCES_LOCAL (info, h)
6444
              || h == htab->elf.hgot)
6445
            break;
6446
          /* fall through */
6447
 
6448
        case R_PPC_ADDR24:
6449
        case R_PPC_ADDR14:
6450
        case R_PPC_ADDR14_BRTAKEN:
6451
        case R_PPC_ADDR14_BRNTAKEN:
6452
          if (h != NULL && !info->shared)
6453
            break;
6454
          /* fall through */
6455
 
6456
        dodyn:
6457
          if ((input_section->flags & SEC_ALLOC) == 0)
6458
            break;
6459
 
6460
          if ((info->shared
6461
               && (h == NULL
6462
                   || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6463
                   || h->root.type != bfd_link_hash_undefweak)
6464
               && (MUST_BE_DYN_RELOC (r_type)
6465
                   || !SYMBOL_CALLS_LOCAL (info, h)))
6466
              || (ELIMINATE_COPY_RELOCS
6467
                  && !info->shared
6468
                  && h != NULL
6469
                  && h->dynindx != -1
6470
                  && !h->non_got_ref
6471
                  && !h->def_regular))
6472
            {
6473
              int skip;
6474
 
6475
#ifdef DEBUG
6476
              fprintf (stderr, "ppc_elf_relocate_section needs to "
6477
                       "create relocation for %s\n",
6478
                       (h && h->root.root.string
6479
                        ? h->root.root.string : "<unknown>"));
6480
#endif
6481
 
6482
              /* When generating a shared object, these relocations
6483
                 are copied into the output file to be resolved at run
6484
                 time.  */
6485
              if (sreloc == NULL)
6486
                {
6487
                  const char *name;
6488
 
6489
                  name = (bfd_elf_string_from_elf_section
6490
                          (input_bfd,
6491
                           elf_elfheader (input_bfd)->e_shstrndx,
6492
                           elf_section_data (input_section)->rel_hdr.sh_name));
6493
                  if (name == NULL)
6494
                    return FALSE;
6495
 
6496
                  BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6497
                              && strcmp (bfd_get_section_name (input_bfd,
6498
                                                               input_section),
6499
                                         name + 5) == 0);
6500
 
6501
                  sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6502
                  BFD_ASSERT (sreloc != NULL);
6503
                }
6504
 
6505
              skip = 0;
6506
 
6507
              outrel.r_offset =
6508
                _bfd_elf_section_offset (output_bfd, info, input_section,
6509
                                         rel->r_offset);
6510
              if (outrel.r_offset == (bfd_vma) -1
6511
                  || outrel.r_offset == (bfd_vma) -2)
6512
                skip = (int) outrel.r_offset;
6513
              outrel.r_offset += (input_section->output_section->vma
6514
                                  + input_section->output_offset);
6515
 
6516
              if (skip)
6517
                memset (&outrel, 0, sizeof outrel);
6518
              else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6519
                {
6520
                  unresolved_reloc = FALSE;
6521
                  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6522
                  outrel.r_addend = rel->r_addend;
6523
                }
6524
              else
6525
                {
6526
                  outrel.r_addend = relocation + rel->r_addend;
6527
 
6528
                  if (r_type == R_PPC_ADDR32)
6529
                    outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6530
                  else
6531
                    {
6532
                      long indx;
6533
 
6534
                      if (bfd_is_abs_section (sec))
6535
                        indx = 0;
6536
                      else if (sec == NULL || sec->owner == NULL)
6537
                        {
6538
                          bfd_set_error (bfd_error_bad_value);
6539
                          return FALSE;
6540
                        }
6541
                      else
6542
                        {
6543
                          asection *osec;
6544
 
6545
                          /* We are turning this relocation into one
6546
                             against a section symbol.  It would be
6547
                             proper to subtract the symbol's value,
6548
                             osec->vma, from the emitted reloc addend,
6549
                             but ld.so expects buggy relocs.  */
6550
                          osec = sec->output_section;
6551
                          indx = elf_section_data (osec)->dynindx;
6552
                          if (indx == 0)
6553
                            {
6554
                              osec = htab->elf.text_index_section;
6555
                              indx = elf_section_data (osec)->dynindx;
6556
                            }
6557
                          BFD_ASSERT (indx != 0);
6558
#ifdef DEBUG
6559
                          if (indx == 0)
6560
                            printf ("indx=%ld section=%s flags=%08x name=%s\n",
6561
                                    indx, osec->name, osec->flags,
6562
                                    h->root.root.string);
6563
#endif
6564
                        }
6565
 
6566
                      outrel.r_info = ELF32_R_INFO (indx, r_type);
6567
                    }
6568
                }
6569
 
6570
              loc = sreloc->contents;
6571
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6572
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6573
 
6574
              if (skip == -1)
6575
                continue;
6576
 
6577
              /* This reloc will be computed at runtime.  We clear the memory
6578
                 so that it contains predictable value.  */
6579
              if (! skip
6580
                  && ((input_section->flags & SEC_ALLOC) != 0
6581
                      || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6582
                {
6583
                  relocation = howto->pc_relative ? outrel.r_offset : 0;
6584
                  addend = 0;
6585
                  break;
6586
                }
6587
            }
6588
          break;
6589
 
6590
        case R_PPC_RELAX32PC_PLT:
6591
        case R_PPC_RELAX32_PLT:
6592
          {
6593
            struct plt_entry *ent = find_plt_ent (h, got2, addend);
6594
 
6595
            if (htab->plt_type == PLT_NEW)
6596
              relocation = (htab->glink->output_section->vma
6597
                            + htab->glink->output_offset
6598
                            + ent->glink_offset);
6599
            else
6600
              relocation = (htab->plt->output_section->vma
6601
                            + htab->plt->output_offset
6602
                            + ent->plt.offset);
6603
            addend = 0;
6604
          }
6605
          if (r_type == R_PPC_RELAX32_PLT)
6606
            goto relax32;
6607
          /* Fall thru */
6608
 
6609
        case R_PPC_RELAX32PC:
6610
          relocation -= (input_section->output_section->vma
6611
                         + input_section->output_offset
6612
                         + rel->r_offset - 4);
6613
          /* Fall thru */
6614
 
6615
        case R_PPC_RELAX32:
6616
        relax32:
6617
          {
6618
            unsigned long t0;
6619
            unsigned long t1;
6620
 
6621
            t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6622
            t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6623
 
6624
            /* We're clearing the bits for R_PPC_ADDR16_HA
6625
               and R_PPC_ADDR16_LO here.  */
6626
            t0 &= ~0xffff;
6627
            t1 &= ~0xffff;
6628
 
6629
            /* t0 is HA, t1 is LO */
6630
            relocation += addend;
6631
            t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6632
            t1 |= relocation & 0xffff;
6633
 
6634
            bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6635
            bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6636
          }
6637
          continue;
6638
 
6639
          /* Indirect .sdata relocation.  */
6640
        case R_PPC_EMB_SDAI16:
6641
          BFD_ASSERT (htab->sdata[0].section != NULL);
6642
          relocation
6643
            = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6644
                                                 h, relocation, rel);
6645
          break;
6646
 
6647
          /* Indirect .sdata2 relocation.  */
6648
        case R_PPC_EMB_SDA2I16:
6649
          BFD_ASSERT (htab->sdata[1].section != NULL);
6650
          relocation
6651
            = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6652
                                                 h, relocation, rel);
6653
          break;
6654
 
6655
          /* Handle the TOC16 reloc.  We want to use the offset within the .got
6656
             section, not the actual VMA.  This is appropriate when generating
6657
             an embedded ELF object, for which the .got section acts like the
6658
             AIX .toc section.  */
6659
        case R_PPC_TOC16:                       /* phony GOT16 relocations */
6660
          BFD_ASSERT (sec != NULL);
6661
          BFD_ASSERT (bfd_is_und_section (sec)
6662
                      || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6663
                      || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6664
 
6665
            addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6666
          break;
6667
 
6668
        case R_PPC_PLTREL24:
6669
          /* Relocation is to the entry for this symbol in the
6670
             procedure linkage table.  */
6671
          {
6672
            struct plt_entry *ent = find_plt_ent (h, got2, addend);
6673
 
6674
            addend = 0;
6675
            if (ent == NULL
6676
                || htab->plt == NULL)
6677
              {
6678
                /* We didn't make a PLT entry for this symbol.  This
6679
                   happens when statically linking PIC code, or when
6680
                   using -Bsymbolic.  */
6681
                break;
6682
              }
6683
 
6684
            unresolved_reloc = FALSE;
6685
            if (htab->plt_type == PLT_NEW)
6686
              relocation = (htab->glink->output_section->vma
6687
                            + htab->glink->output_offset
6688
                            + ent->glink_offset);
6689
            else
6690
              relocation = (htab->plt->output_section->vma
6691
                            + htab->plt->output_offset
6692
                            + ent->plt.offset);
6693
          }
6694
          break;
6695
 
6696
          /* Relocate against _SDA_BASE_.  */
6697
        case R_PPC_SDAREL16:
6698
          {
6699
            const char *name;
6700
            struct elf_link_hash_entry *sh;
6701
 
6702
            BFD_ASSERT (sec != NULL);
6703
            name = bfd_get_section_name (abfd, sec->output_section);
6704
            if (! ((CONST_STRNEQ (name, ".sdata")
6705
                    && (name[6] == 0 || name[6] == '.'))
6706
                   || (CONST_STRNEQ (name, ".sbss")
6707
                       && (name[5] == 0 || name[5] == '.'))))
6708
              {
6709
                (*_bfd_error_handler)
6710
                  (_("%B: the target (%s) of a %s relocation is "
6711
                     "in the wrong output section (%s)"),
6712
                   input_bfd,
6713
                   sym_name,
6714
                   howto->name,
6715
                   name);
6716
              }
6717
            sh = htab->sdata[0].sym;
6718
            addend -= (sh->root.u.def.value
6719
                       + sh->root.u.def.section->output_offset
6720
                       + sh->root.u.def.section->output_section->vma);
6721
          }
6722
          break;
6723
 
6724
          /* Relocate against _SDA2_BASE_.  */
6725
        case R_PPC_EMB_SDA2REL:
6726
          {
6727
            const char *name;
6728
            struct elf_link_hash_entry *sh;
6729
 
6730
            BFD_ASSERT (sec != NULL);
6731
            name = bfd_get_section_name (abfd, sec->output_section);
6732
            if (! (CONST_STRNEQ (name, ".sdata2")
6733
                   || CONST_STRNEQ (name, ".sbss2")))
6734
              {
6735
                (*_bfd_error_handler)
6736
                  (_("%B: the target (%s) of a %s relocation is "
6737
                     "in the wrong output section (%s)"),
6738
                   input_bfd,
6739
                   sym_name,
6740
                   howto->name,
6741
                   name);
6742
 
6743
                bfd_set_error (bfd_error_bad_value);
6744
                ret = FALSE;
6745
                continue;
6746
              }
6747
            sh = htab->sdata[1].sym;
6748
            addend -= (sh->root.u.def.value
6749
                       + sh->root.u.def.section->output_offset
6750
                       + sh->root.u.def.section->output_section->vma);
6751
          }
6752
          break;
6753
 
6754
          /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0.  */
6755
        case R_PPC_EMB_SDA21:
6756
        case R_PPC_EMB_RELSDA:
6757
          {
6758
            const char *name;
6759
            int reg;
6760
            struct elf_link_hash_entry *sh;
6761
 
6762
            BFD_ASSERT (sec != NULL);
6763
            name = bfd_get_section_name (abfd, sec->output_section);
6764
            if (((CONST_STRNEQ (name, ".sdata")
6765
                  && (name[6] == 0 || name[6] == '.'))
6766
                 || (CONST_STRNEQ (name, ".sbss")
6767
                     && (name[5] == 0 || name[5] == '.'))))
6768
              {
6769
                reg = 13;
6770
                sh = htab->sdata[0].sym;
6771
                addend -= (sh->root.u.def.value
6772
                           + sh->root.u.def.section->output_offset
6773
                           + sh->root.u.def.section->output_section->vma);
6774
              }
6775
 
6776
            else if (CONST_STRNEQ (name, ".sdata2")
6777
                     || CONST_STRNEQ (name, ".sbss2"))
6778
              {
6779
                reg = 2;
6780
                sh = htab->sdata[1].sym;
6781
                addend -= (sh->root.u.def.value
6782
                           + sh->root.u.def.section->output_offset
6783
                           + sh->root.u.def.section->output_section->vma);
6784
              }
6785
 
6786
            else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6787
                     || strcmp (name, ".PPC.EMB.sbss0") == 0)
6788
              {
6789
                reg = 0;
6790
              }
6791
 
6792
            else
6793
              {
6794
                (*_bfd_error_handler)
6795
                  (_("%B: the target (%s) of a %s relocation is "
6796
                     "in the wrong output section (%s)"),
6797
                   input_bfd,
6798
                   sym_name,
6799
                   howto->name,
6800
                   name);
6801
 
6802
                bfd_set_error (bfd_error_bad_value);
6803
                ret = FALSE;
6804
                continue;
6805
              }
6806
 
6807
            if (r_type == R_PPC_EMB_SDA21)
6808
              {                 /* fill in register field */
6809
                insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6810
                insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6811
                bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6812
              }
6813
          }
6814
          break;
6815
 
6816
          /* Relocate against the beginning of the section.  */
6817
        case R_PPC_SECTOFF:
6818
        case R_PPC_SECTOFF_LO:
6819
        case R_PPC_SECTOFF_HI:
6820
        case R_PPC_SECTOFF_HA:
6821
          BFD_ASSERT (sec != NULL);
6822
          addend -= sec->output_section->vma;
6823
          break;
6824
 
6825
          /* Negative relocations.  */
6826
        case R_PPC_EMB_NADDR32:
6827
        case R_PPC_EMB_NADDR16:
6828
        case R_PPC_EMB_NADDR16_LO:
6829
        case R_PPC_EMB_NADDR16_HI:
6830
        case R_PPC_EMB_NADDR16_HA:
6831
          addend -= 2 * relocation;
6832
          break;
6833
 
6834
        case R_PPC_COPY:
6835
        case R_PPC_GLOB_DAT:
6836
        case R_PPC_JMP_SLOT:
6837
        case R_PPC_RELATIVE:
6838
        case R_PPC_PLT32:
6839
        case R_PPC_PLTREL32:
6840
        case R_PPC_PLT16_LO:
6841
        case R_PPC_PLT16_HI:
6842
        case R_PPC_PLT16_HA:
6843
        case R_PPC_ADDR30:
6844
        case R_PPC_EMB_RELSEC16:
6845
        case R_PPC_EMB_RELST_LO:
6846
        case R_PPC_EMB_RELST_HI:
6847
        case R_PPC_EMB_RELST_HA:
6848
        case R_PPC_EMB_BIT_FLD:
6849
          (*_bfd_error_handler)
6850
            (_("%B: relocation %s is not yet supported for symbol %s."),
6851
             input_bfd,
6852
             howto->name,
6853
             sym_name);
6854
 
6855
          bfd_set_error (bfd_error_invalid_operation);
6856
          ret = FALSE;
6857
          continue;
6858
        }
6859
 
6860
      /* Do any further special processing.  */
6861
      switch (r_type)
6862
        {
6863
        default:
6864
          break;
6865
 
6866
        case R_PPC_ADDR16_HA:
6867
        case R_PPC_REL16_HA:
6868
        case R_PPC_SECTOFF_HA:
6869
        case R_PPC_TPREL16_HA:
6870
        case R_PPC_DTPREL16_HA:
6871
        case R_PPC_EMB_NADDR16_HA:
6872
        case R_PPC_EMB_RELST_HA:
6873
          /* It's just possible that this symbol is a weak symbol
6874
             that's not actually defined anywhere.  In that case,
6875
             'sec' would be NULL, and we should leave the symbol
6876
             alone (it will be set to zero elsewhere in the link).  */
6877
          if (sec == NULL)
6878
            break;
6879
          /* Fall thru */
6880
 
6881
        case R_PPC_PLT16_HA:
6882
        case R_PPC_GOT16_HA:
6883
        case R_PPC_GOT_TLSGD16_HA:
6884
        case R_PPC_GOT_TLSLD16_HA:
6885
        case R_PPC_GOT_TPREL16_HA:
6886
        case R_PPC_GOT_DTPREL16_HA:
6887
          /* Add 0x10000 if sign bit in 0:15 is set.
6888
             Bits 0:15 are not used.  */
6889
          addend += 0x8000;
6890
          break;
6891
        }
6892
 
6893
#ifdef DEBUG
6894
      fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6895
               "offset = %ld, addend = %ld\n",
6896
               howto->name,
6897
               (int) r_type,
6898
               sym_name,
6899
               r_symndx,
6900
               (long) rel->r_offset,
6901
               (long) addend);
6902
#endif
6903
 
6904
      if (unresolved_reloc
6905
          && !((input_section->flags & SEC_DEBUGGING) != 0
6906
               && h->def_dynamic))
6907
        {
6908
          (*_bfd_error_handler)
6909
            (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6910
             input_bfd,
6911
             input_section,
6912
             (long) rel->r_offset,
6913
             howto->name,
6914
             sym_name);
6915
          ret = FALSE;
6916
        }
6917
 
6918
      r = _bfd_final_link_relocate (howto,
6919
                                    input_bfd,
6920
                                    input_section,
6921
                                    contents,
6922
                                    rel->r_offset,
6923
                                    relocation,
6924
                                    addend);
6925
 
6926
      if (r != bfd_reloc_ok)
6927
        {
6928
          if (r == bfd_reloc_overflow)
6929
            {
6930
              if (warned)
6931
                continue;
6932
              if (h != NULL
6933
                  && h->root.type == bfd_link_hash_undefweak
6934
                  && howto->pc_relative)
6935
                {
6936
                  /* Assume this is a call protected by other code that
6937
                     detect the symbol is undefined.  If this is the case,
6938
                     we can safely ignore the overflow.  If not, the
6939
                     program is hosed anyway, and a little warning isn't
6940
                     going to help.  */
6941
 
6942
                  continue;
6943
                }
6944
 
6945
              if (! (*info->callbacks->reloc_overflow) (info,
6946
                                                        (h ? &h->root : NULL),
6947
                                                        sym_name,
6948
                                                        howto->name,
6949
                                                        rel->r_addend,
6950
                                                        input_bfd,
6951
                                                        input_section,
6952
                                                        rel->r_offset))
6953
                return FALSE;
6954
            }
6955
          else
6956
            {
6957
              (*_bfd_error_handler)
6958
                (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6959
                 input_bfd, input_section,
6960
                 (long) rel->r_offset, howto->name, sym_name, (int) r);
6961
              ret = FALSE;
6962
            }
6963
        }
6964
    }
6965
 
6966
#ifdef DEBUG
6967
  fprintf (stderr, "\n");
6968
#endif
6969
 
6970
  return ret;
6971
}
6972
 
6973
#define PPC_LO(v) ((v) & 0xffff)
6974
#define PPC_HI(v) (((v) >> 16) & 0xffff)
6975
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
6976
 
6977
/* Finish up dynamic symbol handling.  We set the contents of various
6978
   dynamic sections here.  */
6979
 
6980
static bfd_boolean
6981
ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6982
                               struct bfd_link_info *info,
6983
                               struct elf_link_hash_entry *h,
6984
                               Elf_Internal_Sym *sym)
6985
{
6986
  struct ppc_elf_link_hash_table *htab;
6987
  struct plt_entry *ent;
6988
  bfd_boolean doneone;
6989
 
6990
#ifdef DEBUG
6991
  fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6992
           h->root.root.string);
6993
#endif
6994
 
6995
  htab = ppc_elf_hash_table (info);
6996
  BFD_ASSERT (htab->elf.dynobj != NULL);
6997
 
6998
  doneone = FALSE;
6999
  for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7000
    if (ent->plt.offset != (bfd_vma) -1)
7001
      {
7002
        if (!doneone)
7003
          {
7004
            Elf_Internal_Rela rela;
7005
            bfd_byte *loc;
7006
            bfd_vma reloc_index;
7007
 
7008
            if (htab->plt_type == PLT_NEW)
7009
              reloc_index = ent->plt.offset / 4;
7010
            else
7011
              {
7012
                reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7013
                               / htab->plt_slot_size);
7014
                if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7015
                    && htab->plt_type == PLT_OLD)
7016
                  reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7017
              }
7018
 
7019
            /* This symbol has an entry in the procedure linkage table.
7020
               Set it up.  */
7021
            if (htab->plt_type == PLT_VXWORKS)
7022
              {
7023
                bfd_vma got_offset;
7024
                const bfd_vma *plt_entry;
7025
 
7026
                /* The first three entries in .got.plt are reserved.  */
7027
                got_offset = (reloc_index + 3) * 4;
7028
 
7029
                /* Use the right PLT. */
7030
                plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7031
                            : ppc_elf_vxworks_plt_entry;
7032
 
7033
                /* Fill in the .plt on VxWorks.  */
7034
                if (info->shared)
7035
                  {
7036
                    bfd_vma got_offset_hi = (got_offset >> 16)
7037
                                            + ((got_offset & 0x8000) >> 15);
7038
 
7039
                    bfd_put_32 (output_bfd,
7040
                                plt_entry[0] | (got_offset_hi & 0xffff),
7041
                                htab->plt->contents + ent->plt.offset + 0);
7042
                    bfd_put_32 (output_bfd,
7043
                                plt_entry[1] | (got_offset & 0xffff),
7044
                                htab->plt->contents + ent->plt.offset + 4);
7045
                  }
7046
                else
7047
                  {
7048
                    bfd_vma got_loc
7049
                      = (got_offset
7050
                         + htab->elf.hgot->root.u.def.value
7051
                         + htab->elf.hgot->root.u.def.section->output_offset
7052
                         + htab->elf.hgot->root.u.def.section->output_section->vma);
7053
                    bfd_vma got_loc_hi = (got_loc >> 16)
7054
                                         + ((got_loc & 0x8000) >> 15);
7055
 
7056
                    bfd_put_32 (output_bfd,
7057
                                plt_entry[0] | (got_loc_hi & 0xffff),
7058
                                htab->plt->contents + ent->plt.offset + 0);
7059
                    bfd_put_32 (output_bfd,
7060
                                plt_entry[1] | (got_loc & 0xffff),
7061
                                htab->plt->contents + ent->plt.offset + 4);
7062
                  }
7063
 
7064
                bfd_put_32 (output_bfd, plt_entry[2],
7065
                            htab->plt->contents + ent->plt.offset + 8);
7066
                bfd_put_32 (output_bfd, plt_entry[3],
7067
                            htab->plt->contents + ent->plt.offset + 12);
7068
 
7069
                /* This instruction is an immediate load.  The value loaded is
7070
                   the byte offset of the R_PPC_JMP_SLOT relocation from the
7071
                   start of the .rela.plt section.  The value is stored in the
7072
                   low-order 16 bits of the load instruction.  */
7073
                /* NOTE: It appears that this is now an index rather than a
7074
                   prescaled offset.  */
7075
                bfd_put_32 (output_bfd,
7076
                            plt_entry[4] | reloc_index,
7077
                            htab->plt->contents + ent->plt.offset + 16);
7078
                /* This instruction is a PC-relative branch whose target is
7079
                   the start of the PLT section.  The address of this branch
7080
                   instruction is 20 bytes beyond the start of this PLT entry.
7081
                   The address is encoded in bits 6-29, inclusive.  The value
7082
                   stored is right-shifted by two bits, permitting a 26-bit
7083
                   offset.  */
7084
                bfd_put_32 (output_bfd,
7085
                            (plt_entry[5]
7086
                             | (-(ent->plt.offset + 20) & 0x03fffffc)),
7087
                            htab->plt->contents + ent->plt.offset + 20);
7088
                bfd_put_32 (output_bfd, plt_entry[6],
7089
                            htab->plt->contents + ent->plt.offset + 24);
7090
                bfd_put_32 (output_bfd, plt_entry[7],
7091
                            htab->plt->contents + ent->plt.offset + 28);
7092
 
7093
                /* Fill in the GOT entry corresponding to this PLT slot with
7094
                   the address immediately after the the "bctr" instruction
7095
                   in this PLT entry.  */
7096
                bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7097
                                         + htab->plt->output_offset
7098
                                         + ent->plt.offset + 16),
7099
                            htab->sgotplt->contents + got_offset);
7100
 
7101
                if (!info->shared)
7102
                  {
7103
                    /* Fill in a couple of entries in .rela.plt.unloaded.  */
7104
                    loc = htab->srelplt2->contents
7105
                      + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7106
                          * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7107
                         * sizeof (Elf32_External_Rela));
7108
 
7109
                    /* Provide the @ha relocation for the first instruction.  */
7110
                    rela.r_offset = (htab->plt->output_section->vma
7111
                                     + htab->plt->output_offset
7112
                                     + ent->plt.offset + 2);
7113
                    rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7114
                                                R_PPC_ADDR16_HA);
7115
                    rela.r_addend = got_offset;
7116
                    bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7117
                    loc += sizeof (Elf32_External_Rela);
7118
 
7119
                    /* Provide the @l relocation for the second instruction.  */
7120
                    rela.r_offset = (htab->plt->output_section->vma
7121
                                     + htab->plt->output_offset
7122
                                     + ent->plt.offset + 6);
7123
                    rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7124
                                                R_PPC_ADDR16_LO);
7125
                    rela.r_addend = got_offset;
7126
                    bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7127
                    loc += sizeof (Elf32_External_Rela);
7128
 
7129
                    /* Provide a relocation for the GOT entry corresponding to this
7130
                       PLT slot.  Point it at the middle of the .plt entry.  */
7131
                    rela.r_offset = (htab->sgotplt->output_section->vma
7132
                                     + htab->sgotplt->output_offset
7133
                                     + got_offset);
7134
                    rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7135
                                                R_PPC_ADDR32);
7136
                    rela.r_addend = ent->plt.offset + 16;
7137
                    bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7138
                  }
7139
 
7140
                /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7141
                   In particular, the offset for the relocation is not the
7142
                   address of the PLT entry for this function, as specified
7143
                   by the ABI.  Instead, the offset is set to the address of
7144
                   the GOT slot for this function.  See EABI 4.4.4.1.  */
7145
                rela.r_offset = (htab->sgotplt->output_section->vma
7146
                                 + htab->sgotplt->output_offset
7147
                                 + got_offset);
7148
 
7149
              }
7150
            else
7151
              {
7152
                rela.r_offset = (htab->plt->output_section->vma
7153
                                 + htab->plt->output_offset
7154
                                 + ent->plt.offset);
7155
                if (htab->plt_type == PLT_OLD)
7156
                  {
7157
                    /* We don't need to fill in the .plt.  The ppc dynamic
7158
                       linker will fill it in.  */
7159
                  }
7160
                else
7161
                  {
7162
                    bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7163
                                   + htab->glink->output_section->vma
7164
                                   + htab->glink->output_offset);
7165
                    bfd_put_32 (output_bfd, val,
7166
                                htab->plt->contents + ent->plt.offset);
7167
                  }
7168
              }
7169
 
7170
            /* Fill in the entry in the .rela.plt section.  */
7171
            rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7172
            rela.r_addend = 0;
7173
 
7174
            loc = (htab->relplt->contents
7175
                   + reloc_index * sizeof (Elf32_External_Rela));
7176
            bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7177
 
7178
            if (!h->def_regular)
7179
              {
7180
                /* Mark the symbol as undefined, rather than as
7181
                   defined in the .plt section.  Leave the value if
7182
                   there were any relocations where pointer equality
7183
                   matters (this is a clue for the dynamic linker, to
7184
                   make function pointer comparisons work between an
7185
                   application and shared library), otherwise set it
7186
                   to zero.  */
7187
                sym->st_shndx = SHN_UNDEF;
7188
                if (!h->pointer_equality_needed)
7189
                  sym->st_value = 0;
7190
                else if (!h->ref_regular_nonweak)
7191
                  {
7192
                    /* This breaks function pointer comparisons, but
7193
                       that is better than breaking tests for a NULL
7194
                       function pointer.  */
7195
                    sym->st_value = 0;
7196
                  }
7197
              }
7198
            doneone = TRUE;
7199
          }
7200
 
7201
        if (htab->plt_type == PLT_NEW)
7202
          {
7203
            bfd_vma plt;
7204
            unsigned char *p;
7205
 
7206
            plt = (ent->plt.offset
7207
                   + htab->plt->output_section->vma
7208
                   + htab->plt->output_offset);
7209
            p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7210
 
7211
            if (info->shared || info->pie)
7212
              {
7213
                bfd_vma got = 0;
7214
 
7215
                if (ent->addend >= 32768)
7216
                  got = (ent->addend
7217
                         + ent->sec->output_section->vma
7218
                         + ent->sec->output_offset);
7219
                else if (htab->elf.hgot != NULL)
7220
                  got = (htab->elf.hgot->root.u.def.value
7221
                         + htab->elf.hgot->root.u.def.section->output_section->vma
7222
                         + htab->elf.hgot->root.u.def.section->output_offset);
7223
 
7224
                plt -= got;
7225
 
7226
                if (plt + 0x8000 < 0x10000)
7227
                  {
7228
                    bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7229
                    p += 4;
7230
                    bfd_put_32 (output_bfd, MTCTR_11, p);
7231
                    p += 4;
7232
                    bfd_put_32 (output_bfd, BCTR, p);
7233
                    p += 4;
7234
                    bfd_put_32 (output_bfd, NOP, p);
7235
                    p += 4;
7236
                  }
7237
                else
7238
                  {
7239
                    bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7240
                    p += 4;
7241
                    bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7242
                    p += 4;
7243
                    bfd_put_32 (output_bfd, MTCTR_11, p);
7244
                    p += 4;
7245
                    bfd_put_32 (output_bfd, BCTR, p);
7246
                    p += 4;
7247
                  }
7248
              }
7249
            else
7250
              {
7251
                bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7252
                p += 4;
7253
                bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7254
                p += 4;
7255
                bfd_put_32 (output_bfd, MTCTR_11, p);
7256
                p += 4;
7257
                bfd_put_32 (output_bfd, BCTR, p);
7258
                p += 4;
7259
 
7260
                /* We only need one non-PIC glink stub.  */
7261
                break;
7262
              }
7263
          }
7264
        else
7265
          break;
7266
      }
7267
 
7268
  if (h->needs_copy)
7269
    {
7270
      asection *s;
7271
      Elf_Internal_Rela rela;
7272
      bfd_byte *loc;
7273
 
7274
      /* This symbols needs a copy reloc.  Set it up.  */
7275
 
7276
#ifdef DEBUG
7277
      fprintf (stderr, ", copy");
7278
#endif
7279
 
7280
      BFD_ASSERT (h->dynindx != -1);
7281
 
7282
      if (ppc_elf_hash_entry (h)->has_sda_refs)
7283
        s = htab->relsbss;
7284
      else
7285
        s = htab->relbss;
7286
      BFD_ASSERT (s != NULL);
7287
 
7288
      rela.r_offset = (h->root.u.def.value
7289
                       + h->root.u.def.section->output_section->vma
7290
                       + h->root.u.def.section->output_offset);
7291
      rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7292
      rela.r_addend = 0;
7293
      loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7294
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7295
    }
7296
 
7297
#ifdef DEBUG
7298
  fprintf (stderr, "\n");
7299
#endif
7300
 
7301
  /* Mark some specially defined symbols as absolute.  */
7302
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7303
      || (!htab->is_vxworks
7304
          && (h == htab->elf.hgot
7305
              || strcmp (h->root.root.string,
7306
                         "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7307
    sym->st_shndx = SHN_ABS;
7308
 
7309
  return TRUE;
7310
}
7311
 
7312
static enum elf_reloc_type_class
7313
ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7314
{
7315
  switch (ELF32_R_TYPE (rela->r_info))
7316
    {
7317
    case R_PPC_RELATIVE:
7318
      return reloc_class_relative;
7319
    case R_PPC_REL24:
7320
    case R_PPC_ADDR24:
7321
    case R_PPC_JMP_SLOT:
7322
      return reloc_class_plt;
7323
    case R_PPC_COPY:
7324
      return reloc_class_copy;
7325
    default:
7326
      return reloc_class_normal;
7327
    }
7328
}
7329
 
7330
/* Finish up the dynamic sections.  */
7331
 
7332
static bfd_boolean
7333
ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7334
                                 struct bfd_link_info *info)
7335
{
7336
  asection *sdyn;
7337
  asection *splt;
7338
  struct ppc_elf_link_hash_table *htab;
7339
  bfd_vma got;
7340
  bfd * dynobj;
7341
 
7342
#ifdef DEBUG
7343
  fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7344
#endif
7345
 
7346
  htab = ppc_elf_hash_table (info);
7347
  dynobj = elf_hash_table (info)->dynobj;
7348
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7349
  if (htab->is_vxworks)
7350
    splt = bfd_get_section_by_name (dynobj, ".plt");
7351
  else
7352
    splt = NULL;
7353
 
7354
  got = 0;
7355
  if (htab->elf.hgot != NULL)
7356
    got = (htab->elf.hgot->root.u.def.value
7357
           + htab->elf.hgot->root.u.def.section->output_section->vma
7358
           + htab->elf.hgot->root.u.def.section->output_offset);
7359
 
7360
  if (htab->elf.dynamic_sections_created)
7361
    {
7362
      Elf32_External_Dyn *dyncon, *dynconend;
7363
 
7364
      BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7365
 
7366
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
7367
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7368
      for (; dyncon < dynconend; dyncon++)
7369
        {
7370
          Elf_Internal_Dyn dyn;
7371
          asection *s;
7372
 
7373
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7374
 
7375
          switch (dyn.d_tag)
7376
            {
7377
            case DT_PLTGOT:
7378
              if (htab->is_vxworks)
7379
                s = htab->sgotplt;
7380
              else
7381
                s = htab->plt;
7382
              dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7383
              break;
7384
 
7385
            case DT_PLTRELSZ:
7386
              dyn.d_un.d_val = htab->relplt->size;
7387
              break;
7388
 
7389
            case DT_JMPREL:
7390
              s = htab->relplt;
7391
              dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7392
              break;
7393
 
7394
            case DT_PPC_GOT:
7395
              dyn.d_un.d_ptr = got;
7396
              break;
7397
 
7398
            case DT_RELASZ:
7399
              if (htab->is_vxworks)
7400
                {
7401
                  if (htab->relplt)
7402
                    dyn.d_un.d_ptr -= htab->relplt->size;
7403
                  break;
7404
                }
7405
              continue;
7406
 
7407
            default:
7408
              if (htab->is_vxworks
7409
                  && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7410
                break;
7411
              continue;
7412
            }
7413
 
7414
          bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7415
        }
7416
    }
7417
 
7418
  /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7419
     easily find the address of the _GLOBAL_OFFSET_TABLE_.  */
7420
  if (htab->got != NULL)
7421
    {
7422
      unsigned char *p = htab->got->contents;
7423
      bfd_vma val;
7424
 
7425
      p += htab->elf.hgot->root.u.def.value;
7426
      if (htab->plt_type == PLT_OLD)
7427
        bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7428
 
7429
      val = 0;
7430
      if (sdyn != NULL)
7431
        val = sdyn->output_section->vma + sdyn->output_offset;
7432
      bfd_put_32 (output_bfd, val, p);
7433
 
7434
      elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7435
    }
7436
 
7437
  /* Fill in the first entry in the VxWorks procedure linkage table.  */
7438
  if (splt && splt->size > 0)
7439
    {
7440
      /* Use the right PLT. */
7441
      static const bfd_vma *plt_entry = NULL;
7442
      plt_entry = info->shared ?
7443
        ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7444
 
7445
      if (!info->shared)
7446
        {
7447
          bfd_vma got_value =
7448
            (htab->elf.hgot->root.u.def.section->output_section->vma
7449
             + htab->elf.hgot->root.u.def.section->output_offset
7450
             + htab->elf.hgot->root.u.def.value);
7451
          bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7452
 
7453
          bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7454
                      splt->contents +  0);
7455
          bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7456
                      splt->contents +  4);
7457
        }
7458
      else
7459
        {
7460
          bfd_put_32 (output_bfd, plt_entry[0], splt->contents +  0);
7461
          bfd_put_32 (output_bfd, plt_entry[1], splt->contents +  4);
7462
        }
7463
      bfd_put_32 (output_bfd, plt_entry[2], splt->contents +  8);
7464
      bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7465
      bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7466
      bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7467
      bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7468
      bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7469
 
7470
      if (! info->shared)
7471
        {
7472
          Elf_Internal_Rela rela;
7473
          bfd_byte *loc;
7474
 
7475
          loc = htab->srelplt2->contents;
7476
 
7477
          /* Output the @ha relocation for the first instruction.  */
7478
          rela.r_offset = (htab->plt->output_section->vma
7479
                           + htab->plt->output_offset
7480
                           + 2);
7481
          rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7482
          rela.r_addend = 0;
7483
          bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7484
          loc += sizeof (Elf32_External_Rela);
7485
 
7486
          /* Output the @l relocation for the second instruction.  */
7487
          rela.r_offset = (htab->plt->output_section->vma
7488
                           + htab->plt->output_offset
7489
                           + 6);
7490
          rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7491
          rela.r_addend = 0;
7492
          bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7493
          loc += sizeof (Elf32_External_Rela);
7494
 
7495
          /* Fix up the remaining relocations.  They may have the wrong
7496
             symbol index for _G_O_T_ or _P_L_T_ depending on the order
7497
             in which symbols were output.  */
7498
          while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7499
            {
7500
              Elf_Internal_Rela rel;
7501
 
7502
              bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7503
              rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7504
              bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7505
              loc += sizeof (Elf32_External_Rela);
7506
 
7507
              bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7508
              rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7509
              bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7510
              loc += sizeof (Elf32_External_Rela);
7511
 
7512
              bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7513
              rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7514
              bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7515
              loc += sizeof (Elf32_External_Rela);
7516
            }
7517
        }
7518
    }
7519
 
7520
  if (htab->glink != NULL && htab->glink->contents != NULL)
7521
    {
7522
      unsigned char *p;
7523
      unsigned char *endp;
7524
      bfd_vma res0;
7525
      unsigned int i;
7526
 
7527
      /*
7528
       * PIC glink code is the following:
7529
       *
7530
       * # ith PLT code stub.
7531
       *   addis 11,30,(plt+(i-1)*4-got)@ha
7532
       *   lwz 11,(plt+(i-1)*4-got)@l(11)
7533
       *   mtctr 11
7534
       *   bctr
7535
       *
7536
       * # A table of branches, one for each plt entry.
7537
       * # The idea is that the plt call stub loads ctr (and r11) with these
7538
       * # addresses, so (r11 - res_0) gives the plt index * 4.
7539
       * res_0: b PLTresolve
7540
       * res_1: b PLTresolve
7541
       * .
7542
       * # Some number of entries towards the end can be nops
7543
       * res_n_m3: nop
7544
       * res_n_m2: nop
7545
       * res_n_m1:
7546
       *
7547
       * PLTresolve:
7548
       *    addis 11,11,(1f-res_0)@ha
7549
       *    mflr 0
7550
       *    bcl 20,31,1f
7551
       * 1: addi 11,11,(1b-res_0)@l
7552
       *    mflr 12
7553
       *    mtlr 0
7554
       *    sub 11,11,12                # r11 = index * 4
7555
       *    addis 12,12,(got+4-1b)@ha
7556
       *    lwz 0,(got+4-1b)@l(12)      # got[1] address of dl_runtime_resolve
7557
       *    lwz 12,(got+8-1b)@l(12)     # got[2] contains the map address
7558
       *    mtctr 0
7559
       *    add 0,11,11
7560
       *    add 11,0,11                 # r11 = index * 12 = reloc offset.
7561
       *    bctr
7562
       */
7563
      static const unsigned int pic_plt_resolve[] =
7564
        {
7565
          ADDIS_11_11,
7566
          MFLR_0,
7567
          BCL_20_31,
7568
          ADDI_11_11,
7569
          MFLR_12,
7570
          MTLR_0,
7571
          SUB_11_11_12,
7572
          ADDIS_12_12,
7573
          LWZ_0_12,
7574
          LWZ_12_12,
7575
          MTCTR_0,
7576
          ADD_0_11_11,
7577
          ADD_11_0_11,
7578
          BCTR,
7579
          NOP,
7580
          NOP
7581
        };
7582
 
7583
      static const unsigned int plt_resolve[] =
7584
        {
7585
          LIS_12,
7586
          ADDIS_11_11,
7587
          LWZ_0_12,
7588
          ADDI_11_11,
7589
          MTCTR_0,
7590
          ADD_0_11_11,
7591
          LWZ_12_12,
7592
          ADD_11_0_11,
7593
          BCTR,
7594
          NOP,
7595
          NOP,
7596
          NOP,
7597
          NOP,
7598
          NOP,
7599
          NOP,
7600
          NOP
7601
        };
7602
 
7603
      if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7604
        abort ();
7605
      if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7606
        abort ();
7607
 
7608
      /* Build the branch table, one for each plt entry (less one),
7609
         and perhaps some padding.  */
7610
      p = htab->glink->contents;
7611
      p += htab->glink_pltresolve;
7612
      endp = htab->glink->contents;
7613
      endp += htab->glink->size - GLINK_PLTRESOLVE;
7614
      while (p < endp - 8 * 4)
7615
        {
7616
          bfd_put_32 (output_bfd, B + endp - p, p);
7617
          p += 4;
7618
        }
7619
      while (p < endp)
7620
        {
7621
          bfd_put_32 (output_bfd, NOP, p);
7622
          p += 4;
7623
        }
7624
 
7625
      res0 = (htab->glink_pltresolve
7626
              + htab->glink->output_section->vma
7627
              + htab->glink->output_offset);
7628
 
7629
      /* Last comes the PLTresolve stub.  */
7630
      if (info->shared || info->pie)
7631
        {
7632
          bfd_vma bcl;
7633
 
7634
          for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7635
            {
7636
              bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7637
              p += 4;
7638
            }
7639
          p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7640
 
7641
          bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7642
                 + htab->glink->output_section->vma
7643
                 + htab->glink->output_offset);
7644
 
7645
          bfd_put_32 (output_bfd,
7646
                      ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7647
          bfd_put_32 (output_bfd,
7648
                      ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7649
          bfd_put_32 (output_bfd,
7650
                      ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7651
          if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7652
            {
7653
              bfd_put_32 (output_bfd,
7654
                          LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7655
              bfd_put_32 (output_bfd,
7656
                          LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7657
            }
7658
          else
7659
            {
7660
              bfd_put_32 (output_bfd,
7661
                          LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7662
              bfd_put_32 (output_bfd,
7663
                          LWZ_12_12 + 4, p + 9*4);
7664
            }
7665
        }
7666
      else
7667
        {
7668
          for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7669
            {
7670
              bfd_put_32 (output_bfd, plt_resolve[i], p);
7671
              p += 4;
7672
            }
7673
          p -= 4 * ARRAY_SIZE (plt_resolve);
7674
 
7675
          bfd_put_32 (output_bfd,
7676
                      LIS_12 + PPC_HA (got + 4), p + 0*4);
7677
          bfd_put_32 (output_bfd,
7678
                      ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7679
          bfd_put_32 (output_bfd,
7680
                      ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7681
          if (PPC_HA (got + 4) == PPC_HA (got + 8))
7682
            {
7683
              bfd_put_32 (output_bfd,
7684
                          LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7685
              bfd_put_32 (output_bfd,
7686
                          LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7687
            }
7688
          else
7689
            {
7690
              bfd_put_32 (output_bfd,
7691
                          LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7692
              bfd_put_32 (output_bfd,
7693
                          LWZ_12_12 + 4, p + 6*4);
7694
            }
7695
        }
7696
    }
7697
 
7698
  return TRUE;
7699
}
7700
 
7701
#define TARGET_LITTLE_SYM       bfd_elf32_powerpcle_vec
7702
#define TARGET_LITTLE_NAME      "elf32-powerpcle"
7703
#define TARGET_BIG_SYM          bfd_elf32_powerpc_vec
7704
#define TARGET_BIG_NAME         "elf32-powerpc"
7705
#define ELF_ARCH                bfd_arch_powerpc
7706
#define ELF_MACHINE_CODE        EM_PPC
7707
#ifdef __QNXTARGET__
7708
#define ELF_MAXPAGESIZE         0x1000
7709
#else
7710
#define ELF_MAXPAGESIZE         0x10000
7711
#endif
7712
#define ELF_MINPAGESIZE         0x1000
7713
#define ELF_COMMONPAGESIZE      0x1000
7714
#define elf_info_to_howto       ppc_elf_info_to_howto
7715
 
7716
#ifdef  EM_CYGNUS_POWERPC
7717
#define ELF_MACHINE_ALT1        EM_CYGNUS_POWERPC
7718
#endif
7719
 
7720
#ifdef EM_PPC_OLD
7721
#define ELF_MACHINE_ALT2        EM_PPC_OLD
7722
#endif
7723
 
7724
#define elf_backend_plt_not_loaded      1
7725
#define elf_backend_can_gc_sections     1
7726
#define elf_backend_can_refcount        1
7727
#define elf_backend_rela_normal         1
7728
 
7729
#define bfd_elf32_mkobject                      ppc_elf_mkobject
7730
#define bfd_elf32_bfd_merge_private_bfd_data    ppc_elf_merge_private_bfd_data
7731
#define bfd_elf32_bfd_relax_section             ppc_elf_relax_section
7732
#define bfd_elf32_bfd_reloc_type_lookup         ppc_elf_reloc_type_lookup
7733
#define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7734
#define bfd_elf32_bfd_set_private_flags         ppc_elf_set_private_flags
7735
#define bfd_elf32_bfd_link_hash_table_create    ppc_elf_link_hash_table_create
7736
 
7737
#define elf_backend_object_p                    ppc_elf_object_p
7738
#define elf_backend_gc_mark_hook                ppc_elf_gc_mark_hook
7739
#define elf_backend_gc_sweep_hook               ppc_elf_gc_sweep_hook
7740
#define elf_backend_section_from_shdr           ppc_elf_section_from_shdr
7741
#define elf_backend_relocate_section            ppc_elf_relocate_section
7742
#define elf_backend_create_dynamic_sections     ppc_elf_create_dynamic_sections
7743
#define elf_backend_check_relocs                ppc_elf_check_relocs
7744
#define elf_backend_copy_indirect_symbol        ppc_elf_copy_indirect_symbol
7745
#define elf_backend_adjust_dynamic_symbol       ppc_elf_adjust_dynamic_symbol
7746
#define elf_backend_add_symbol_hook             ppc_elf_add_symbol_hook
7747
#define elf_backend_size_dynamic_sections       ppc_elf_size_dynamic_sections
7748
#define elf_backend_hash_symbol                 ppc_elf_hash_symbol
7749
#define elf_backend_finish_dynamic_symbol       ppc_elf_finish_dynamic_symbol
7750
#define elf_backend_finish_dynamic_sections     ppc_elf_finish_dynamic_sections
7751
#define elf_backend_fake_sections               ppc_elf_fake_sections
7752
#define elf_backend_additional_program_headers  ppc_elf_additional_program_headers
7753
#define elf_backend_grok_prstatus               ppc_elf_grok_prstatus
7754
#define elf_backend_grok_psinfo                 ppc_elf_grok_psinfo
7755
#define elf_backend_write_core_note             ppc_elf_write_core_note
7756
#define elf_backend_reloc_type_class            ppc_elf_reloc_type_class
7757
#define elf_backend_begin_write_processing      ppc_elf_begin_write_processing
7758
#define elf_backend_final_write_processing      ppc_elf_final_write_processing
7759
#define elf_backend_write_section               ppc_elf_write_section
7760
#define elf_backend_get_sec_type_attr           ppc_elf_get_sec_type_attr
7761
#define elf_backend_plt_sym_val                 ppc_elf_plt_sym_val
7762
#define elf_backend_action_discarded            ppc_elf_action_discarded
7763
#define elf_backend_init_index_section          _bfd_elf_init_1_index_section
7764
 
7765
#include "elf32-target.h"
7766
 
7767
/* VxWorks Target */
7768
 
7769
#undef TARGET_LITTLE_SYM
7770
#undef TARGET_LITTLE_NAME
7771
 
7772
#undef TARGET_BIG_SYM
7773
#define TARGET_BIG_SYM          bfd_elf32_powerpc_vxworks_vec
7774
#undef TARGET_BIG_NAME
7775
#define TARGET_BIG_NAME         "elf32-powerpc-vxworks"
7776
 
7777
/* VxWorks uses the elf default section flags for .plt.  */
7778
static const struct bfd_elf_special_section *
7779
ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7780
{
7781
  if (sec->name == NULL)
7782
    return NULL;
7783
 
7784
  if (strcmp (sec->name, ".plt") == 0)
7785
    return _bfd_elf_get_sec_type_attr (abfd, sec);
7786
 
7787
  return ppc_elf_get_sec_type_attr (abfd, sec);
7788
}
7789
 
7790
/* Like ppc_elf_link_hash_table_create, but overrides
7791
   appropriately for VxWorks.  */
7792
static struct bfd_link_hash_table *
7793
ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7794
{
7795
  struct bfd_link_hash_table *ret;
7796
 
7797
  ret = ppc_elf_link_hash_table_create (abfd);
7798
  if (ret)
7799
    {
7800
      struct ppc_elf_link_hash_table *htab
7801
        = (struct ppc_elf_link_hash_table *)ret;
7802
      htab->is_vxworks = 1;
7803
      htab->plt_type = PLT_VXWORKS;
7804
      htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7805
      htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7806
      htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7807
    }
7808
  return ret;
7809
}
7810
 
7811
/* Tweak magic VxWorks symbols as they are loaded.  */
7812
static bfd_boolean
7813
ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7814
                                 struct bfd_link_info *info,
7815
                                 Elf_Internal_Sym *sym,
7816
                                 const char **namep ATTRIBUTE_UNUSED,
7817
                                 flagword *flagsp ATTRIBUTE_UNUSED,
7818
                                 asection **secp,
7819
                                 bfd_vma *valp)
7820
{
7821
  if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7822
                                   valp))
7823
    return FALSE;
7824
 
7825
  return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7826
}
7827
 
7828
static void
7829
ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7830
{
7831
  ppc_elf_final_write_processing(abfd, linker);
7832
  elf_vxworks_final_write_processing(abfd, linker);
7833
}
7834
 
7835
/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7836
   define it.  */
7837
#undef elf_backend_want_plt_sym
7838
#define elf_backend_want_plt_sym                1
7839
#undef elf_backend_want_got_plt
7840
#define elf_backend_want_got_plt                1
7841
#undef elf_backend_got_symbol_offset
7842
#define elf_backend_got_symbol_offset           0
7843
#undef elf_backend_plt_not_loaded
7844
#define elf_backend_plt_not_loaded              0
7845
#undef elf_backend_plt_readonly
7846
#define elf_backend_plt_readonly                1
7847
#undef elf_backend_got_header_size
7848
#define elf_backend_got_header_size             12
7849
 
7850
#undef bfd_elf32_bfd_link_hash_table_create
7851
#define bfd_elf32_bfd_link_hash_table_create \
7852
  ppc_elf_vxworks_link_hash_table_create
7853
#undef elf_backend_add_symbol_hook
7854
#define elf_backend_add_symbol_hook \
7855
  ppc_elf_vxworks_add_symbol_hook
7856
#undef elf_backend_link_output_symbol_hook
7857
#define elf_backend_link_output_symbol_hook \
7858
  elf_vxworks_link_output_symbol_hook
7859
#undef elf_backend_final_write_processing
7860
#define elf_backend_final_write_processing \
7861
  ppc_elf_vxworks_final_write_processing
7862
#undef elf_backend_get_sec_type_attr
7863
#define elf_backend_get_sec_type_attr \
7864
  ppc_elf_vxworks_get_sec_type_attr
7865
#undef elf_backend_emit_relocs
7866
#define elf_backend_emit_relocs \
7867
  elf_vxworks_emit_relocs
7868
 
7869
#undef elf32_bed
7870
#define elf32_bed                               ppc_elf_vxworks_bed
7871
 
7872
#include "elf32-target.h"

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