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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.20.1/] [bfd/] [elf32-cris.c] - Blame information for rev 205

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1 205 julius
/* CRIS-specific support for 32-bit ELF.
2
   Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3
   Free Software Foundation, Inc.
4
   Contributed by Axis Communications AB.
5
   Written by Hans-Peter Nilsson, based on elf32-fr30.c
6
   PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7
 
8
   This file is part of BFD, the Binary File Descriptor library.
9
 
10
   This program is free software; you can redistribute it and/or modify
11
   it under the terms of the GNU General Public License as published by
12
   the Free Software Foundation; either version 3 of the License, or
13
   (at your option) any later version.
14
 
15
   This program is distributed in the hope that it will be useful,
16
   but WITHOUT ANY WARRANTY; without even the implied warranty of
17
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18
   GNU General Public License for more details.
19
 
20
   You should have received a copy of the GNU General Public License
21
   along with this program; if not, write to the Free Software
22
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23
   MA 02110-1301, USA.  */
24
 
25
#include "sysdep.h"
26
#include "bfd.h"
27
#include "libbfd.h"
28
#include "elf-bfd.h"
29
#include "elf/cris.h"
30
#include <limits.h>
31
 
32
/* Forward declarations.  */
33
static reloc_howto_type * cris_reloc_type_lookup
34
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
35
 
36
static void cris_info_to_howto_rela
37
  PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
38
 
39
static bfd_reloc_status_type cris_elf_pcrel_reloc
40
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
41
 
42
static bfd_boolean cris_elf_grok_prstatus
43
  PARAMS ((bfd *abfd, Elf_Internal_Note *note));
44
 
45
static bfd_boolean cris_elf_grok_psinfo
46
  PARAMS ((bfd *abfd, Elf_Internal_Note *note));
47
 
48
static bfd_boolean cris_elf_relocate_section
49
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
50
           Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
51
 
52
static bfd_reloc_status_type cris_final_link_relocate
53
  PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
54
           Elf_Internal_Rela *, bfd_vma));
55
 
56
static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
57
 
58
static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
59
 
60
static bfd_boolean cris_elf_set_mach_from_flags
61
  PARAMS ((bfd *, unsigned long int));
62
 
63
static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
64
 
65
static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
66
static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
67
 
68
struct elf_cris_link_hash_entry;
69
static bfd_boolean elf_cris_discard_excess_dso_dynamics
70
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
71
static bfd_boolean elf_cris_discard_excess_program_dynamics
72
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
73
static bfd_boolean elf_cris_adjust_gotplt_to_got
74
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
75
static bfd_boolean elf_cris_try_fold_plt_to_got
76
  PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77
static struct bfd_hash_entry *elf_cris_link_hash_newfunc
78
  PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
79
static struct bfd_link_hash_table *elf_cris_link_hash_table_create
80
  PARAMS ((bfd *));
81
static bfd_boolean elf_cris_adjust_dynamic_symbol
82
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
83
static bfd_boolean cris_elf_check_relocs
84
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
85
           const Elf_Internal_Rela *));
86
 
87
static bfd_boolean elf_cris_size_dynamic_sections
88
  PARAMS ((bfd *, struct bfd_link_info *));
89
static bfd_boolean elf_cris_finish_dynamic_symbol
90
  PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
91
           Elf_Internal_Sym *));
92
static bfd_boolean elf_cris_finish_dynamic_sections
93
  PARAMS ((bfd *, struct bfd_link_info *));
94
static void elf_cris_hide_symbol
95
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
96
static enum elf_reloc_type_class elf_cris_reloc_type_class
97
  PARAMS ((const Elf_Internal_Rela *));
98
 
99
static reloc_howto_type cris_elf_howto_table [] =
100
{
101
  /* This reloc does nothing.  */
102
  HOWTO (R_CRIS_NONE,           /* type */
103
         0,                      /* rightshift */
104
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
105
         32,                    /* bitsize */
106
         FALSE,                 /* pc_relative */
107
         0,                      /* bitpos */
108
         complain_overflow_bitfield, /* complain_on_overflow */
109
         bfd_elf_generic_reloc, /* special_function */
110
         "R_CRIS_NONE",         /* name */
111
         FALSE,                 /* partial_inplace */
112
         0,                      /* src_mask */
113
         0,                      /* dst_mask */
114
         FALSE),                /* pcrel_offset */
115
 
116
  /* An 8 bit absolute relocation.  */
117
  HOWTO (R_CRIS_8,              /* type */
118
         0,                      /* rightshift */
119
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
120
         8,                     /* bitsize */
121
         FALSE,                 /* pc_relative */
122
         0,                      /* bitpos */
123
         complain_overflow_bitfield, /* complain_on_overflow */
124
         bfd_elf_generic_reloc, /* special_function */
125
         "R_CRIS_8",            /* name */
126
         FALSE,                 /* partial_inplace */
127
         0x0000,                /* src_mask */
128
         0x00ff,                /* dst_mask */
129
         FALSE),                /* pcrel_offset */
130
 
131
  /* A 16 bit absolute relocation.  */
132
  HOWTO (R_CRIS_16,             /* type */
133
         0,                      /* rightshift */
134
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
135
         16,                    /* bitsize */
136
         FALSE,                 /* pc_relative */
137
         0,                      /* bitpos */
138
         complain_overflow_bitfield, /* complain_on_overflow */
139
         bfd_elf_generic_reloc, /* special_function */
140
         "R_CRIS_16",           /* name */
141
         FALSE,                 /* partial_inplace */
142
         0x00000000,            /* src_mask */
143
         0x0000ffff,            /* dst_mask */
144
         FALSE),                /* pcrel_offset */
145
 
146
  /* A 32 bit absolute relocation.  */
147
  HOWTO (R_CRIS_32,             /* type */
148
         0,                      /* rightshift */
149
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
150
         32,                    /* bitsize */
151
         FALSE,                 /* pc_relative */
152
         0,                      /* bitpos */
153
         /* We don't want overflow complaints for 64-bit vma builds
154
            for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
155
            32-bit ELF) where sym=0xc0001234.
156
            Don't do this for the PIC relocs, as we don't expect to
157
            see them with large offsets.  */
158
         complain_overflow_dont, /* complain_on_overflow */
159
         bfd_elf_generic_reloc, /* special_function */
160
         "R_CRIS_32",           /* name */
161
         FALSE,                 /* partial_inplace */
162
         0x00000000,            /* src_mask */
163
         0xffffffff,            /* dst_mask */
164
         FALSE),                /* pcrel_offset */
165
 
166
  /* An 8 bit PC-relative relocation.  */
167
  HOWTO (R_CRIS_8_PCREL,        /* type */
168
         0,                      /* rightshift */
169
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
170
         8,                     /* bitsize */
171
         TRUE,                  /* pc_relative */
172
         0,                      /* bitpos */
173
         complain_overflow_bitfield, /* complain_on_overflow */
174
         cris_elf_pcrel_reloc,  /* special_function */
175
         "R_CRIS_8_PCREL",      /* name */
176
         FALSE,                 /* partial_inplace */
177
         0x0000,                /* src_mask */
178
         0x00ff,                /* dst_mask */
179
         TRUE),                 /* pcrel_offset */
180
 
181
  /* A 16 bit PC-relative relocation.  */
182
  HOWTO (R_CRIS_16_PCREL,       /* type */
183
         0,                      /* rightshift */
184
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
185
         16,                    /* bitsize */
186
         TRUE,                  /* pc_relative */
187
         0,                      /* bitpos */
188
         complain_overflow_bitfield, /* complain_on_overflow */
189
         cris_elf_pcrel_reloc,  /* special_function */
190
         "R_CRIS_16_PCREL",     /* name */
191
         FALSE,                 /* partial_inplace */
192
         0x00000000,            /* src_mask */
193
         0x0000ffff,            /* dst_mask */
194
         TRUE),                 /* pcrel_offset */
195
 
196
  /* A 32 bit PC-relative relocation.  */
197
  HOWTO (R_CRIS_32_PCREL,       /* type */
198
         0,                      /* rightshift */
199
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
200
         32,                    /* bitsize */
201
         TRUE,                  /* pc_relative */
202
         0,                      /* bitpos */
203
         complain_overflow_bitfield, /* complain_on_overflow */
204
         cris_elf_pcrel_reloc,  /* special_function */
205
         "R_CRIS_32_PCREL",     /* name */
206
         FALSE,                 /* partial_inplace */
207
         0x00000000,            /* src_mask */
208
         0xffffffff,            /* dst_mask */
209
         TRUE),                 /* pcrel_offset */
210
 
211
  /* GNU extension to record C++ vtable hierarchy.  */
212
  HOWTO (R_CRIS_GNU_VTINHERIT,  /* type */
213
         0,                      /* rightshift */
214
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
215
         0,                      /* bitsize */
216
         FALSE,                 /* pc_relative */
217
         0,                      /* bitpos */
218
         complain_overflow_dont, /* complain_on_overflow */
219
         NULL,                  /* special_function */
220
         "R_CRIS_GNU_VTINHERIT", /* name */
221
         FALSE,                 /* partial_inplace */
222
         0,                      /* src_mask */
223
         0,                      /* dst_mask */
224
         FALSE),                /* pcrel_offset */
225
 
226
  /* GNU extension to record C++ vtable member usage.  */
227
  HOWTO (R_CRIS_GNU_VTENTRY,    /* type */
228
         0,                      /* rightshift */
229
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
230
         0,                      /* bitsize */
231
         FALSE,                 /* pc_relative */
232
         0,                      /* bitpos */
233
         complain_overflow_dont, /* complain_on_overflow */
234
         _bfd_elf_rel_vtable_reloc_fn,  /* special_function */
235
         "R_CRIS_GNU_VTENTRY",   /* name */
236
         FALSE,                 /* partial_inplace */
237
         0,                      /* src_mask */
238
         0,                      /* dst_mask */
239
         FALSE),                /* pcrel_offset */
240
 
241
  /* This is used only by the dynamic linker.  The symbol should exist
242
     both in the object being run and in some shared library.  The
243
     dynamic linker copies the data addressed by the symbol from the
244
     shared library into the object, because the object being
245
     run has to have the data at some particular address.  */
246
  HOWTO (R_CRIS_COPY,           /* type */
247
         0,                      /* rightshift */
248
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
249
         32,                    /* bitsize */
250
         FALSE,                 /* pc_relative */
251
         0,                      /* bitpos */
252
         complain_overflow_bitfield, /* complain_on_overflow */
253
         bfd_elf_generic_reloc, /* special_function */
254
         "R_CRIS_COPY",         /* name */
255
         FALSE,                 /* partial_inplace */
256
         0,                      /* src_mask */
257
         0,                      /* dst_mask */
258
         FALSE),                /* pcrel_offset */
259
 
260
  /* Like R_CRIS_32, but used when setting global offset table entries.  */
261
  HOWTO (R_CRIS_GLOB_DAT,       /* type */
262
         0,                      /* rightshift */
263
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
264
         32,                    /* bitsize */
265
         FALSE,                 /* pc_relative */
266
         0,                      /* bitpos */
267
         complain_overflow_bitfield, /* complain_on_overflow */
268
         bfd_elf_generic_reloc, /* special_function */
269
         "R_CRIS_GLOB_DAT",     /* name */
270
         FALSE,                 /* partial_inplace */
271
         0,                      /* src_mask */
272
         0xffffffff,            /* dst_mask */
273
         FALSE),                /* pcrel_offset */
274
 
275
  /* Marks a procedure linkage table entry for a symbol.  */
276
  HOWTO (R_CRIS_JUMP_SLOT,      /* type */
277
         0,                      /* rightshift */
278
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
279
         32,                    /* bitsize */
280
         FALSE,                 /* pc_relative */
281
         0,                      /* bitpos */
282
         complain_overflow_bitfield, /* complain_on_overflow */
283
         bfd_elf_generic_reloc, /* special_function */
284
         "R_CRIS_JUMP_SLOT",    /* name */
285
         FALSE,                 /* partial_inplace */
286
         0,                      /* src_mask */
287
         0,                      /* dst_mask */
288
         FALSE),                /* pcrel_offset */
289
 
290
  /* Used only by the dynamic linker.  When the object is run, this
291
     longword is set to the load address of the object, plus the
292
     addend.  */
293
  HOWTO (R_CRIS_RELATIVE,       /* type */
294
         0,                      /* rightshift */
295
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
296
         32,                    /* bitsize */
297
         FALSE,                 /* pc_relative */
298
         0,                      /* bitpos */
299
         complain_overflow_bitfield, /* complain_on_overflow */
300
         bfd_elf_generic_reloc, /* special_function */
301
         "R_CRIS_RELATIVE",     /* name */
302
         FALSE,                 /* partial_inplace */
303
         0,                      /* src_mask */
304
         0xffffffff,            /* dst_mask */
305
         FALSE),                /* pcrel_offset */
306
 
307
  /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
308
  HOWTO (R_CRIS_16_GOT,         /* type */
309
         0,                      /* rightshift */
310
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
311
         16,                    /* bitsize */
312
         FALSE,                 /* pc_relative */
313
         0,                      /* bitpos */
314
         complain_overflow_bitfield, /* complain_on_overflow */
315
         bfd_elf_generic_reloc, /* special_function */
316
         "R_CRIS_16_GOT",       /* name */
317
         FALSE,                 /* partial_inplace */
318
         0,                      /* src_mask */
319
         0xffff,                /* dst_mask */
320
         FALSE),                /* pcrel_offset */
321
 
322
  HOWTO (R_CRIS_32_GOT,         /* type */
323
         0,                      /* rightshift */
324
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
325
         32,                    /* bitsize */
326
         FALSE,                 /* pc_relative */
327
         0,                      /* bitpos */
328
         complain_overflow_bitfield, /* complain_on_overflow */
329
         bfd_elf_generic_reloc, /* special_function */
330
         "R_CRIS_32_GOT",       /* name */
331
         FALSE,                 /* partial_inplace */
332
         0,                      /* src_mask */
333
         0xffffffff,            /* dst_mask */
334
         FALSE),                /* pcrel_offset */
335
 
336
  /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
337
     the GOT table for the symbol.  */
338
  HOWTO (R_CRIS_16_GOTPLT,      /* type */
339
         0,                      /* rightshift */
340
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
341
         16,                    /* bitsize */
342
         FALSE,                 /* pc_relative */
343
         0,                      /* bitpos */
344
         complain_overflow_bitfield, /* complain_on_overflow */
345
         bfd_elf_generic_reloc, /* special_function */
346
         "R_CRIS_16_GOTPLT",    /* name */
347
         FALSE,                 /* partial_inplace */
348
         0,                      /* src_mask */
349
         0xffff,                /* dst_mask */
350
         FALSE),                /* pcrel_offset */
351
 
352
  HOWTO (R_CRIS_32_GOTPLT,      /* type */
353
         0,                      /* rightshift */
354
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
355
         32,                    /* bitsize */
356
         FALSE,                 /* pc_relative */
357
         0,                      /* bitpos */
358
         complain_overflow_bitfield, /* complain_on_overflow */
359
         bfd_elf_generic_reloc, /* special_function */
360
         "R_CRIS_32_GOTPLT",    /* name */
361
         FALSE,                 /* partial_inplace */
362
         0,                      /* src_mask */
363
         0xffffffff,            /* dst_mask */
364
         FALSE),                /* pcrel_offset */
365
 
366
  /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
367
     be necessary.  */
368
  HOWTO (R_CRIS_32_GOTREL,      /* type */
369
         0,                      /* rightshift */
370
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
371
         32,                    /* bitsize */
372
         FALSE,                 /* pc_relative */
373
         0,                      /* bitpos */
374
         complain_overflow_bitfield, /* complain_on_overflow */
375
         bfd_elf_generic_reloc, /* special_function */
376
         "R_CRIS_32_GOTREL",    /* name */
377
         FALSE,                 /* partial_inplace */
378
         0,                      /* src_mask */
379
         0xffffffff,            /* dst_mask */
380
         FALSE),                /* pcrel_offset */
381
 
382
  /* A 32-bit offset from GOT to entry for this symbol in PLT and request
383
     to create PLT entry for symbol.  */
384
  HOWTO (R_CRIS_32_PLT_GOTREL,  /* type */
385
         0,                      /* rightshift */
386
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
387
         32,                    /* bitsize */
388
         FALSE,                 /* pc_relative */
389
         0,                      /* bitpos */
390
         complain_overflow_bitfield, /* complain_on_overflow */
391
         bfd_elf_generic_reloc, /* special_function */
392
         "R_CRIS_32_PLT_GOTREL", /* name */
393
         FALSE,                 /* partial_inplace */
394
         0,                      /* src_mask */
395
         0xffffffff,            /* dst_mask */
396
         FALSE),                /* pcrel_offset */
397
 
398
  /* A 32-bit offset from PC (location after the relocation) + addend to
399
     entry for this symbol in PLT and request to create PLT entry for
400
     symbol.  */
401
  HOWTO (R_CRIS_32_PLT_PCREL,   /* type */
402
         0,                      /* rightshift */
403
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
404
         32,                    /* bitsize */
405
         TRUE,                  /* pc_relative */
406
         0,                      /* bitpos */
407
         complain_overflow_bitfield, /* complain_on_overflow */
408
         cris_elf_pcrel_reloc,  /* special_function */
409
         "R_CRIS_32_PLT_PCREL", /* name */
410
         FALSE,                 /* partial_inplace */
411
         0,                      /* src_mask */
412
         0xffffffff,            /* dst_mask */
413
         TRUE),                 /* pcrel_offset */
414
 
415
  /* We don't handle these in any special manner and cross-format
416
     linking is not supported; just recognize them enough to pass them
417
     around.  FIXME: do the same for most PIC relocs and add sanity
418
     tests to actually refuse gracefully to handle these and PIC
419
     relocs for cross-format linking.  */
420
#define TLSHOWTO32(name) \
421
 HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
422
        bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
423
#define TLSHOWTO16X(name, X)         \
424
 HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
425
        bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
426
#define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
427
#define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
428
 
429
  TLSHOWTO32 (R_CRIS_32_GOT_GD),
430
  TLSHOWTO16 (R_CRIS_16_GOT_GD),
431
  TLSHOWTO32 (R_CRIS_32_GD),
432
  TLSHOWTO32 (R_CRIS_DTP),
433
  TLSHOWTO32 (R_CRIS_32_DTPREL),
434
  TLSHOWTO16S (R_CRIS_16_DTPREL),
435
  TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
436
  TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
437
  TLSHOWTO32 (R_CRIS_32_TPREL),
438
  TLSHOWTO16S (R_CRIS_16_TPREL),
439
  TLSHOWTO32 (R_CRIS_DTPMOD),
440
  TLSHOWTO32 (R_CRIS_32_IE)
441
};
442
 
443
/* Map BFD reloc types to CRIS ELF reloc types.  */
444
 
445
struct cris_reloc_map
446
{
447
  bfd_reloc_code_real_type bfd_reloc_val;
448
  unsigned int cris_reloc_val;
449
};
450
 
451
static const struct cris_reloc_map cris_reloc_map [] =
452
{
453
  { BFD_RELOC_NONE,             R_CRIS_NONE },
454
  { BFD_RELOC_8,                R_CRIS_8 },
455
  { BFD_RELOC_16,               R_CRIS_16 },
456
  { BFD_RELOC_32,               R_CRIS_32 },
457
  { BFD_RELOC_8_PCREL,          R_CRIS_8_PCREL },
458
  { BFD_RELOC_16_PCREL,         R_CRIS_16_PCREL },
459
  { BFD_RELOC_32_PCREL,         R_CRIS_32_PCREL },
460
  { BFD_RELOC_VTABLE_INHERIT,   R_CRIS_GNU_VTINHERIT },
461
  { BFD_RELOC_VTABLE_ENTRY,     R_CRIS_GNU_VTENTRY },
462
  { BFD_RELOC_CRIS_COPY,        R_CRIS_COPY },
463
  { BFD_RELOC_CRIS_GLOB_DAT,    R_CRIS_GLOB_DAT },
464
  { BFD_RELOC_CRIS_JUMP_SLOT,   R_CRIS_JUMP_SLOT },
465
  { BFD_RELOC_CRIS_RELATIVE,    R_CRIS_RELATIVE },
466
  { BFD_RELOC_CRIS_16_GOT,      R_CRIS_16_GOT },
467
  { BFD_RELOC_CRIS_32_GOT,      R_CRIS_32_GOT },
468
  { BFD_RELOC_CRIS_16_GOTPLT,   R_CRIS_16_GOTPLT },
469
  { BFD_RELOC_CRIS_32_GOTPLT,   R_CRIS_32_GOTPLT },
470
  { BFD_RELOC_CRIS_32_GOTREL,   R_CRIS_32_GOTREL },
471
  { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
472
  { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
473
  { BFD_RELOC_CRIS_32_GOT_GD,   R_CRIS_32_GOT_GD },
474
  { BFD_RELOC_CRIS_16_GOT_GD,   R_CRIS_16_GOT_GD },
475
  { BFD_RELOC_CRIS_32_GD,       R_CRIS_32_GD },
476
  { BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
477
  { BFD_RELOC_CRIS_32_DTPREL,   R_CRIS_32_DTPREL },
478
  { BFD_RELOC_CRIS_16_DTPREL,   R_CRIS_16_DTPREL },
479
  { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
480
  { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
481
  { BFD_RELOC_CRIS_32_TPREL,    R_CRIS_32_TPREL },
482
  { BFD_RELOC_CRIS_16_TPREL,    R_CRIS_16_TPREL },
483
  { BFD_RELOC_CRIS_DTPMOD,      R_CRIS_DTPMOD },
484
  { BFD_RELOC_CRIS_32_IE,       R_CRIS_32_IE }
485
};
486
 
487
static reloc_howto_type *
488
cris_reloc_type_lookup (abfd, code)
489
     bfd * abfd ATTRIBUTE_UNUSED;
490
     bfd_reloc_code_real_type code;
491
{
492
  unsigned int i;
493
 
494
  for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
495
    if (cris_reloc_map [i].bfd_reloc_val == code)
496
      return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
497
 
498
  return NULL;
499
}
500
 
501
static reloc_howto_type *
502
cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
503
{
504
  unsigned int i;
505
 
506
  for (i = 0;
507
       i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
508
       i++)
509
    if (cris_elf_howto_table[i].name != NULL
510
        && strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
511
      return &cris_elf_howto_table[i];
512
 
513
  return NULL;
514
}
515
 
516
/* Set the howto pointer for an CRIS ELF reloc.  */
517
 
518
static void
519
cris_info_to_howto_rela (abfd, cache_ptr, dst)
520
     bfd * abfd ATTRIBUTE_UNUSED;
521
     arelent * cache_ptr;
522
     Elf_Internal_Rela * dst;
523
{
524
  enum elf_cris_reloc_type r_type;
525
 
526
  r_type = ELF32_R_TYPE (dst->r_info);
527
  BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
528
  cache_ptr->howto = & cris_elf_howto_table [r_type];
529
}
530
 
531
bfd_reloc_status_type
532
cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
533
                      output_bfd, error_message)
534
     bfd *abfd ATTRIBUTE_UNUSED;
535
     arelent *reloc_entry;
536
     asymbol *symbol;
537
     PTR data ATTRIBUTE_UNUSED;
538
     asection *input_section;
539
     bfd *output_bfd;
540
     char **error_message ATTRIBUTE_UNUSED;
541
{
542
  /* By default (using only bfd_elf_generic_reloc when linking to
543
     non-ELF formats) PC-relative relocs are relative to the beginning
544
     of the reloc.  CRIS PC-relative relocs are relative to the position
545
     *after* the reloc because that's what pre-CRISv32 PC points to
546
     after reading an insn field with that reloc.  (For CRISv32, PC is
547
     actually relative to the start of the insn, but we keep the old
548
     definition.)  Still, we use as much generic machinery as we can.
549
 
550
     Only adjust when doing a final link.  */
551
  if (output_bfd == (bfd *) NULL)
552
    reloc_entry->addend -= 1 << reloc_entry->howto->size;
553
 
554
  return
555
    bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
556
                           input_section, output_bfd, error_message);
557
}
558
 
559
/* Support for core dump NOTE sections.
560
   The slightly unintuitive code layout is an attempt to keep at least
561
   some similarities with other ports, hoping to simplify general
562
   changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
563
 
564
static bfd_boolean
565
cris_elf_grok_prstatus (abfd, note)
566
     bfd *abfd;
567
     Elf_Internal_Note *note;
568
{
569
  int offset;
570
  size_t size;
571
 
572
  if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
573
    switch (note->descsz)
574
      {
575
      default:
576
        return FALSE;
577
 
578
      case 202:         /* Linux/CRISv32 */
579
        /* pr_cursig */
580
        elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
581
 
582
        /* pr_pid */
583
        elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
584
 
585
        /* pr_reg */
586
        offset = 70;
587
        size = 128;
588
 
589
        break;
590
      }
591
  else
592
    switch (note->descsz)
593
      {
594
      default:
595
        return FALSE;
596
 
597
      case 214:         /* Linux/CRIS */
598
        /* pr_cursig */
599
        elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
600
 
601
        /* pr_pid */
602
        elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
603
 
604
        /* pr_reg */
605
        offset = 70;
606
        size = 140;
607
 
608
        break;
609
      }
610
 
611
  /* Make a ".reg/999" section.  */
612
  return _bfd_elfcore_make_pseudosection (abfd, ".reg",
613
                                          size, note->descpos + offset);
614
}
615
 
616
static bfd_boolean
617
cris_elf_grok_psinfo (abfd, note)
618
     bfd *abfd;
619
     Elf_Internal_Note *note;
620
{
621
  if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
622
    switch (note->descsz)
623
      {
624
      default:
625
        return FALSE;
626
 
627
      case 124:         /* Linux/CRISv32 elf_prpsinfo */
628
        elf_tdata (abfd)->core_program
629
          = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
630
        elf_tdata (abfd)->core_command
631
          = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
632
      }
633
  else
634
    switch (note->descsz)
635
      {
636
      default:
637
        return FALSE;
638
 
639
      case 124:         /* Linux/CRIS elf_prpsinfo */
640
        elf_tdata (abfd)->core_program
641
          = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
642
        elf_tdata (abfd)->core_command
643
          = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
644
      }
645
 
646
  /* Note that for some reason, a spurious space is tacked
647
     onto the end of the args in some (at least one anyway)
648
     implementations, so strip it off if it exists.  */
649
 
650
  {
651
    char *command = elf_tdata (abfd)->core_command;
652
    int n = strlen (command);
653
 
654
    if (0 < n && command[n - 1] == ' ')
655
      command[n - 1] = '\0';
656
  }
657
 
658
  return TRUE;
659
}
660
 
661
/* The name of the dynamic interpreter.  This is put in the .interp
662
   section.  */
663
 
664
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
665
 
666
/* The size in bytes of an entry in the procedure linkage table.  */
667
 
668
#define PLT_ENTRY_SIZE 20
669
#define PLT_ENTRY_SIZE_V32 26
670
 
671
/* The first entry in an absolute procedure linkage table looks like this.  */
672
 
673
static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
674
{
675
  0xfc, 0xe1,
676
  0x7e, 0x7e,   /* push mof.  */
677
  0x7f, 0x0d,   /*  (dip [pc+]) */
678
  0, 0, 0, 0,       /*  Replaced with address of .got + 4.  */
679
  0x30, 0x7a,   /* move [...],mof */
680
  0x7f, 0x0d,   /*  (dip [pc+]) */
681
  0, 0, 0, 0,       /*  Replaced with address of .got + 8.  */
682
  0x30, 0x09    /* jump [...] */
683
};
684
 
685
static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
686
{
687
  0x84, 0xe2,   /* subq 4,$sp */
688
  0x6f, 0xfe,   /* move.d 0,$acr */
689
  0, 0, 0, 0,       /*  Replaced by address of .got + 4.  */
690
  0x7e, 0x7a,   /* move $mof,[$sp] */
691
  0x3f, 0x7a,   /* move [$acr],$mof */
692
  0x04, 0xf2,   /* addq 4,acr */
693
  0x6f, 0xfa,   /* move.d [$acr],$acr */
694
  0xbf, 0x09,   /* jump $acr */
695
  0xb0, 0x05,   /* nop */
696
  0, 0            /*  Pad out to 26 bytes.  */
697
};
698
 
699
/* Subsequent entries in an absolute procedure linkage table look like
700
   this.  */
701
 
702
static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
703
{
704
  0x7f, 0x0d,   /*  (dip [pc+]) */
705
  0, 0, 0, 0,       /*  Replaced with address of this symbol in .got.  */
706
  0x30, 0x09,   /* jump [...] */
707
  0x3f,  0x7e,  /* move [pc+],mof */
708
  0, 0, 0, 0,       /*  Replaced with offset into relocation table.  */
709
  0x2f, 0xfe,   /* add.d [pc+],pc */
710
  0xec, 0xff,
711
  0xff, 0xff    /*  Replaced with offset to start of .plt.  */
712
};
713
 
714
static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
715
{
716
  0x6f, 0xfe,   /* move.d 0,$acr */
717
  0, 0, 0, 0,       /*  Replaced with address of this symbol in .got.  */
718
  0x6f, 0xfa,   /* move.d [$acr],$acr */
719
  0xbf, 0x09,   /* jump $acr */
720
  0xb0, 0x05,   /* nop */
721
  0x3f, 0x7e,   /* move 0,mof */
722
  0, 0, 0, 0,       /*  Replaced with offset into relocation table. */
723
  0xbf, 0x0e,   /* ba start_of_plt0_entry */
724
  0, 0, 0, 0,       /*  Replaced with offset to plt0 entry.  */
725
  0xb0, 0x05    /* nop */
726
};
727
 
728
/* The first entry in a PIC procedure linkage table looks like this.  */
729
 
730
static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
731
{
732
  0xfc, 0xe1, 0x7e, 0x7e,       /* push mof */
733
  0x04, 0x01, 0x30, 0x7a,       /* move [r0+4],mof */
734
  0x08, 0x01, 0x30, 0x09,       /* jump [r0+8] */
735
  0, 0, 0, 0, 0, 0, 0, 0,       /*  Pad out to 20 bytes.  */
736
};
737
 
738
static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
739
{
740
  0x84, 0xe2,   /* subq 4,$sp */
741
  0x04, 0x01,   /* addoq 4,$r0,$acr */
742
  0x7e, 0x7a,   /* move $mof,[$sp] */
743
  0x3f, 0x7a,   /* move [$acr],$mof */
744
  0x04, 0xf2,   /* addq 4,$acr */
745
  0x6f, 0xfa,   /* move.d [$acr],$acr */
746
  0xbf, 0x09,   /* jump $acr */
747
  0xb0, 0x05,   /* nop */
748
  0, 0,           /*  Pad out to 26 bytes.  */
749
  0, 0, 0, 0,
750
  0, 0, 0, 0
751
};
752
 
753
/* Subsequent entries in a PIC procedure linkage table look like this.  */
754
 
755
static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
756
{
757
  0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
758
  0, 0, 0, 0,       /*  Replaced with offset of this symbol in .got.  */
759
  0x30, 0x09,   /* jump [...] */
760
  0x3f, 0x7e,   /* move [pc+],mof */
761
  0, 0, 0, 0,       /*  Replaced with offset into relocation table.  */
762
  0x2f, 0xfe,   /* add.d [pc+],pc */
763
  0xec, 0xff,   /*  Replaced with offset to start of .plt.  */
764
  0xff, 0xff
765
};
766
 
767
static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
768
{
769
  0x6f, 0x0d,   /* addo.d 0,$r0,$acr */
770
  0, 0, 0, 0,       /*  Replaced with offset of this symbol in .got.  */
771
  0x6f, 0xfa,   /* move.d [$acr],$acr */
772
  0xbf, 0x09,   /* jump $acr */
773
  0xb0, 0x05,   /* nop */
774
  0x3f, 0x7e,   /* move relocoffs,$mof */
775
  0, 0, 0, 0,       /*  Replaced with offset into relocation table.  */
776
  0xbf, 0x0e,   /* ba start_of_plt */
777
  0, 0, 0, 0,       /*  Replaced with offset to start of .plt.  */
778
  0xb0, 0x05    /* nop */
779
};
780
 
781
/* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
782
   (and most other PIC/shlib stuff).  Check that we don't drift away
783
   without reason.
784
 
785
   The CRIS linker, like the m68k and i386 linkers (and probably the rest
786
   too) needs to keep track of the number of relocs that it decides to
787
   copy in check_relocs for each symbol.  This is so that it can discard
788
   PC relative relocs if it doesn't need them when linking with
789
   -Bsymbolic.  We store the information in a field extending the regular
790
   ELF linker hash table.  */
791
 
792
/* This structure keeps track of the number of PC relative relocs we have
793
   copied for a given symbol.  */
794
 
795
struct elf_cris_pcrel_relocs_copied
796
{
797
  /* Next section.  */
798
  struct elf_cris_pcrel_relocs_copied *next;
799
 
800
  /* A section in dynobj.  */
801
  asection *section;
802
 
803
  /* Number of relocs copied in this section.  */
804
  bfd_size_type count;
805
 
806
  /* Example of reloc being copied, for message.  */
807
  enum elf_cris_reloc_type r_type;
808
};
809
 
810
/* CRIS ELF linker hash entry.  */
811
 
812
struct elf_cris_link_hash_entry
813
{
814
  struct elf_link_hash_entry root;
815
 
816
  /* Number of PC relative relocs copied for this symbol.  */
817
  struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
818
 
819
  /* The GOTPLT references are CRIS-specific; the goal is to avoid having
820
     both a general GOT and a PLT-specific GOT entry for the same symbol,
821
     when it is referenced both as a function and as a function pointer.
822
 
823
     Number of GOTPLT references for a function.  */
824
  bfd_signed_vma gotplt_refcount;
825
 
826
  /* Actual GOTPLT index for this symbol, if applicable, or zero if not
827
     (zero is never used as an index).  FIXME: We should be able to fold
828
     this with gotplt_refcount in a union, like the got and plt unions in
829
     elf_link_hash_entry.  */
830
  bfd_size_type gotplt_offset;
831
 
832
  /* The root.got.refcount is the sum of the regular reference counts
833
     (this) and those members below.  We have to keep a separate count
834
     to track when we've found the first (or last) reference to a
835
     regular got entry.  The offset is in root.got.offset.  */
836
  bfd_signed_vma reg_got_refcount;
837
 
838
  /* Similar to the above, the number of reloc references to this
839
     symbols that need a R_CRIS_32_TPREL slot.  The offset is in
840
     root.got.offset, because this and .dtp_refcount can't validly
841
     happen when there's also a regular GOT entry; that's invalid
842
     input for which an error is emitted.  */
843
  bfd_signed_vma tprel_refcount;
844
 
845
  /* Similar to the above, the number of reloc references to this
846
     symbols that need a R_CRIS_DTP slot.  The offset is in
847
     root.got.offset; plus 4 if .tprel_refcount > 0.  */
848
  bfd_signed_vma dtp_refcount;
849
};
850
 
851
/* The local_got_refcounts and local_got_offsets are a multiple of
852
   LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
853
   refcount for GOT itself, see code), with the summary / group offset
854
   for local symbols located at offset N, reference counts for
855
   ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
856
   relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
857
   3*LSNUM.  */
858
 
859
#define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
860
#define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
861
#define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
862
#define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
863
 
864
/* CRIS ELF linker hash table.  */
865
 
866
struct elf_cris_link_hash_table
867
{
868
  struct elf_link_hash_table root;
869
 
870
  /* We can't use the PLT offset and calculate to get the GOTPLT offset,
871
     since we try and avoid creating GOTPLT:s when there's already a GOT.
872
     Instead, we keep and update the next available index here.  */
873
  bfd_size_type next_gotplt_entry;
874
 
875
  /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
876
     been seen for any input; if != 0, then the constant-offset
877
     R_CRIS_DTPMOD is needed for this DSO/executable.  This turns
878
     negative at relocation, so that we don't need an extra flag for
879
     when the reloc is output.  */
880
  bfd_signed_vma dtpmod_refcount;
881
};
882
 
883
/* Traverse a CRIS ELF linker hash table.  */
884
 
885
#define elf_cris_link_hash_traverse(table, func, info)                  \
886
  (elf_link_hash_traverse                                               \
887
   (&(table)->root,                                                     \
888
    (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
889
    (info)))
890
 
891
/* Get the CRIS ELF linker hash table from a link_info structure.  */
892
 
893
#define elf_cris_hash_table(p) \
894
  ((struct elf_cris_link_hash_table *) (p)->hash)
895
 
896
/* Get the CRIS ELF linker hash entry from a regular hash entry (the
897
   "parent class").  The .root reference is just a simple type
898
   check on the argument.  */
899
 
900
#define elf_cris_hash_entry(p) \
901
 ((struct elf_cris_link_hash_entry *) (&(p)->root))
902
 
903
/* Create an entry in a CRIS ELF linker hash table.  */
904
 
905
static struct bfd_hash_entry *
906
elf_cris_link_hash_newfunc (entry, table, string)
907
     struct bfd_hash_entry *entry;
908
     struct bfd_hash_table *table;
909
     const char *string;
910
{
911
  struct elf_cris_link_hash_entry *ret =
912
    (struct elf_cris_link_hash_entry *) entry;
913
 
914
  /* Allocate the structure if it has not already been allocated by a
915
     subclass.  */
916
  if (ret == (struct elf_cris_link_hash_entry *) NULL)
917
    ret = ((struct elf_cris_link_hash_entry *)
918
           bfd_hash_allocate (table,
919
                              sizeof (struct elf_cris_link_hash_entry)));
920
  if (ret == (struct elf_cris_link_hash_entry *) NULL)
921
    return (struct bfd_hash_entry *) ret;
922
 
923
  /* Call the allocation method of the superclass.  */
924
  ret = ((struct elf_cris_link_hash_entry *)
925
         _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
926
                                     table, string));
927
  if (ret != (struct elf_cris_link_hash_entry *) NULL)
928
    {
929
      ret->pcrel_relocs_copied = NULL;
930
      ret->gotplt_refcount = 0;
931
      ret->gotplt_offset = 0;
932
      ret->dtp_refcount = 0;
933
      ret->tprel_refcount = 0;
934
      ret->reg_got_refcount = 0;
935
    }
936
 
937
  return (struct bfd_hash_entry *) ret;
938
}
939
 
940
/* Create a CRIS ELF linker hash table.  */
941
 
942
static struct bfd_link_hash_table *
943
elf_cris_link_hash_table_create (abfd)
944
     bfd *abfd;
945
{
946
  struct elf_cris_link_hash_table *ret;
947
  bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
948
 
949
  ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
950
  if (ret == (struct elf_cris_link_hash_table *) NULL)
951
    return NULL;
952
 
953
  if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
954
                                      elf_cris_link_hash_newfunc,
955
                                      sizeof (struct elf_cris_link_hash_entry)))
956
    {
957
      free (ret);
958
      return NULL;
959
    }
960
 
961
  /* Initialize to skip over the first three entries in the gotplt; they
962
     are used for run-time symbol evaluation.  */
963
  ret->next_gotplt_entry = 12;
964
 
965
  /* We haven't seen any R_CRIS_nn_GOT_TPREL initially.  */
966
  ret->dtpmod_refcount = 0;
967
 
968
  return &ret->root.root;
969
}
970
 
971
/* Perform a single relocation.  By default we use the standard BFD
972
   routines, with a few tweaks.  */
973
 
974
static bfd_reloc_status_type
975
cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
976
                          relocation)
977
     reloc_howto_type *  howto;
978
     bfd *               input_bfd;
979
     asection *          input_section;
980
     bfd_byte *          contents;
981
     Elf_Internal_Rela * rel;
982
     bfd_vma             relocation;
983
{
984
  bfd_reloc_status_type r;
985
  enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
986
 
987
  /* PC-relative relocations are relative to the position *after*
988
     the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
989
     not a single byte, since PC must be 16-bit-aligned.  */
990
  switch (r_type)
991
    {
992
      /* Check that the 16-bit GOT relocs are positive.  */
993
    case R_CRIS_16_GOTPLT:
994
    case R_CRIS_16_GOT:
995
      if ((bfd_signed_vma) relocation < 0)
996
        return bfd_reloc_overflow;
997
      break;
998
 
999
    case R_CRIS_32_PLT_PCREL:
1000
    case R_CRIS_32_PCREL:
1001
      relocation -= 2;
1002
      /* Fall through.  */
1003
    case R_CRIS_8_PCREL:
1004
    case R_CRIS_16_PCREL:
1005
      relocation -= 2;
1006
      break;
1007
 
1008
    default:
1009
      break;
1010
    }
1011
 
1012
  r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1013
                                contents, rel->r_offset,
1014
                                relocation, rel->r_addend);
1015
  return r;
1016
}
1017
 
1018
 
1019
/* The number of errors left before we stop outputting reloc-specific
1020
   explanatory messages.  By coincidence, this works nicely together
1021
   with the default number of messages you'll get from LD about
1022
   "relocation truncated to fit" messages before you get an
1023
   "additional relocation overflows omitted from the output".  */
1024
static int additional_relocation_error_msg_count = 10;
1025
 
1026
/* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
1027
   copied, for further comments.  */
1028
 
1029
static bfd_boolean
1030
cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1031
                           contents, relocs, local_syms, local_sections)
1032
     bfd *output_bfd ATTRIBUTE_UNUSED;
1033
     struct bfd_link_info *info;
1034
     bfd *input_bfd;
1035
     asection *input_section;
1036
     bfd_byte *contents;
1037
     Elf_Internal_Rela *relocs;
1038
     Elf_Internal_Sym *local_syms;
1039
     asection **local_sections;
1040
{
1041
  bfd *dynobj;
1042
  Elf_Internal_Shdr *symtab_hdr;
1043
  struct elf_link_hash_entry **sym_hashes;
1044
  bfd_vma *local_got_offsets;
1045
  asection *sgot;
1046
  asection *splt;
1047
  asection *sreloc;
1048
  Elf_Internal_Rela *rel;
1049
  Elf_Internal_Rela *relend;
1050
  asection *srelgot;
1051
 
1052
  dynobj = elf_hash_table (info)->dynobj;
1053
  local_got_offsets = elf_local_got_offsets (input_bfd);
1054
  symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1055
  sym_hashes = elf_sym_hashes (input_bfd);
1056
  relend     = relocs + input_section->reloc_count;
1057
 
1058
  sgot = NULL;
1059
  splt = NULL;
1060
  sreloc = NULL;
1061
  srelgot = NULL;
1062
 
1063
  if (dynobj != NULL)
1064
    {
1065
      splt = bfd_get_section_by_name (dynobj, ".plt");
1066
      sgot = bfd_get_section_by_name (dynobj, ".got");
1067
    }
1068
 
1069
  for (rel = relocs; rel < relend; rel ++)
1070
    {
1071
      reloc_howto_type *howto;
1072
      unsigned long r_symndx;
1073
      Elf_Internal_Sym *sym;
1074
      asection *sec;
1075
      struct elf_link_hash_entry *h;
1076
      bfd_vma relocation;
1077
      bfd_reloc_status_type r;
1078
      const char *symname = NULL;
1079
      enum elf_cris_reloc_type r_type;
1080
 
1081
      r_type = ELF32_R_TYPE (rel->r_info);
1082
 
1083
      if (   r_type == R_CRIS_GNU_VTINHERIT
1084
          || r_type == R_CRIS_GNU_VTENTRY)
1085
        continue;
1086
 
1087
      r_symndx = ELF32_R_SYM (rel->r_info);
1088
      howto  = cris_elf_howto_table + r_type;
1089
      h      = NULL;
1090
      sym    = NULL;
1091
      sec    = NULL;
1092
 
1093
      if (r_symndx < symtab_hdr->sh_info)
1094
        {
1095
          sym = local_syms + r_symndx;
1096
          sec = local_sections [r_symndx];
1097
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1098
 
1099
          symname = (bfd_elf_string_from_elf_section
1100
                     (input_bfd, symtab_hdr->sh_link, sym->st_name));
1101
          if (symname == NULL)
1102
            symname = bfd_section_name (input_bfd, sec);
1103
        }
1104
      else
1105
        {
1106
          bfd_boolean warned;
1107
          bfd_boolean unresolved_reloc;
1108
 
1109
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1110
                                   r_symndx, symtab_hdr, sym_hashes,
1111
                                   h, sec, relocation,
1112
                                   unresolved_reloc, warned);
1113
 
1114
          symname = h->root.root.string;
1115
 
1116
          if (unresolved_reloc
1117
              /* Perhaps we should detect the cases that
1118
                 sec->output_section is expected to be NULL like i386 and
1119
                 m68k, but apparently (and according to elfxx-ia64.c) all
1120
                 valid cases are where the symbol is defined in a shared
1121
                 object which we link dynamically against.  This includes
1122
                 PLT relocs for which we've created a PLT entry and other
1123
                 relocs for which we're prepared to create dynamic
1124
                 relocations.
1125
 
1126
                 For now, new situations cause us to just err when
1127
                 sec->output_offset is NULL but the object with the symbol
1128
                 is *not* dynamically linked against.  Thus this will
1129
                 automatically remind us so we can see if there are other
1130
                 valid cases we need to revisit.  */
1131
              && (sec->owner->flags & DYNAMIC) != 0)
1132
            relocation = 0;
1133
 
1134
          else if (h->root.type == bfd_link_hash_defined
1135
                   || h->root.type == bfd_link_hash_defweak)
1136
            {
1137
              /* Here follow the cases where the relocation value must
1138
                 be zero (or when further handling is simplified when
1139
                 zero).  I can't claim to understand the various
1140
                 conditions and they weren't described in the files
1141
                 where I copied them from (elf32-m68k.c and
1142
                 elf32-i386.c), but let's mention examples of where
1143
                 they happen.  FIXME: Perhaps define and use a
1144
                 dynamic_symbol_p function like ia64.
1145
 
1146
                 - When creating a shared library, we can have an
1147
                 ordinary relocation for a symbol defined in a shared
1148
                 library (perhaps the one we create).  We then make
1149
                 the relocation value zero, as the value seen now will
1150
                 be added into the relocation addend in this shared
1151
                 library, but must be handled only at dynamic-link
1152
                 time.  FIXME: Not sure this example covers the
1153
                 h->elf_link_hash_flags test, though it's there in
1154
                 other targets.  */
1155
              if (info->shared
1156
                  && ((! info->symbolic && h->dynindx != -1)
1157
                      || !h->def_regular)
1158
                  && (input_section->flags & SEC_ALLOC) != 0
1159
                  && (r_type == R_CRIS_8
1160
                      || r_type == R_CRIS_16
1161
                      || r_type == R_CRIS_32
1162
                      || r_type == R_CRIS_8_PCREL
1163
                      || r_type == R_CRIS_16_PCREL
1164
                      || r_type == R_CRIS_32_PCREL))
1165
                relocation = 0;
1166
              else if (!info->relocatable && unresolved_reloc)
1167
                {
1168
                  _bfd_error_handler
1169
                    (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1170
                     input_bfd,
1171
                     input_section,
1172
                     cris_elf_howto_table[r_type].name,
1173
                     symname);
1174
                  bfd_set_error (bfd_error_bad_value);
1175
                  return FALSE;
1176
                }
1177
            }
1178
        }
1179
 
1180
      if (sec != NULL && elf_discarded_section (sec))
1181
        {
1182
          /* For relocs against symbols from removed linkonce sections,
1183
             or sections discarded by a linker script, we just want the
1184
             section contents zeroed.  Avoid any special processing.  */
1185
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1186
          rel->r_info = 0;
1187
          rel->r_addend = 0;
1188
          continue;
1189
        }
1190
 
1191
      if (info->relocatable)
1192
        continue;
1193
 
1194
      switch (r_type)
1195
        {
1196
        case R_CRIS_16_GOTPLT:
1197
        case R_CRIS_32_GOTPLT:
1198
          /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1199
             but we require a PLT, and the PLT handling will take care of
1200
             filling in the PLT-specific GOT entry.  For the GOT offset,
1201
             calculate it as we do when filling it in for the .got.plt
1202
             section.  If we don't have a PLT, punt to GOT handling.  */
1203
          if (h != NULL
1204
              && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1205
            {
1206
              asection *sgotplt
1207
                = bfd_get_section_by_name (dynobj, ".got.plt");
1208
              bfd_vma got_offset;
1209
 
1210
              BFD_ASSERT (h->dynindx != -1);
1211
              BFD_ASSERT (sgotplt != NULL);
1212
 
1213
              got_offset
1214
                = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1215
 
1216
              relocation = got_offset;
1217
              break;
1218
            }
1219
 
1220
          /* We didn't make a PLT entry for this symbol.  Maybe everything is
1221
             folded into the GOT.  Other than folding, this happens when
1222
             statically linking PIC code, or when using -Bsymbolic.  Check
1223
             that we instead have a GOT entry as done for us by
1224
             elf_cris_adjust_dynamic_symbol, and drop through into the
1225
             ordinary GOT cases.  This must not happen for the
1226
             executable, because any reference it does to a function
1227
             that is satisfied by a DSO must generate a PLT.  We assume
1228
             these call-specific relocs don't address non-functions.  */
1229
          if (h != NULL
1230
              && (h->got.offset == (bfd_vma) -1
1231
                  || (!info->shared
1232
                      && !(h->def_regular
1233
                           || (!h->def_dynamic
1234
                               && h->root.type == bfd_link_hash_undefweak)))))
1235
            {
1236
              (*_bfd_error_handler)
1237
                ((h->got.offset == (bfd_vma) -1)
1238
                 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1239
                     " against symbol `%s'")
1240
                 : _("%B, section %A: No PLT for relocation %s"
1241
                     " against symbol `%s'"),
1242
                 input_bfd,
1243
                 input_section,
1244
                 cris_elf_howto_table[r_type].name,
1245
                 (symname != NULL && symname[0] != '\0'
1246
                  ? symname : _("[whose name is lost]")));
1247
 
1248
              /* FIXME: Perhaps blaming input is not the right thing to
1249
                 do; this is probably an internal error.  But it is true
1250
                 that we didn't like that particular input.  */
1251
              bfd_set_error (bfd_error_bad_value);
1252
              return FALSE;
1253
            }
1254
          /* Fall through.  */
1255
 
1256
          /* The size of the actual relocation is not used here; we only
1257
             fill in the GOT table here.  */
1258
        case R_CRIS_16_GOT:
1259
        case R_CRIS_32_GOT:
1260
          {
1261
            bfd_vma off;
1262
 
1263
            /* Note that despite using RELA relocations, the .got contents
1264
               is always filled in with the link-relative relocation
1265
               value; the addend.  */
1266
 
1267
            if (h != NULL)
1268
              {
1269
                off = h->got.offset;
1270
                BFD_ASSERT (off != (bfd_vma) -1);
1271
 
1272
                if (!elf_hash_table (info)->dynamic_sections_created
1273
                    || (! info->shared
1274
                        && (h->def_regular
1275
                            || h->type == STT_FUNC
1276
                            || h->needs_plt))
1277
                    || (info->shared
1278
                        && (info->symbolic || h->dynindx == -1)
1279
                        && h->def_regular))
1280
                  {
1281
                    /* This wasn't checked above for ! info->shared, but
1282
                       must hold there if we get here; the symbol must
1283
                       be defined in the regular program or be undefweak
1284
                       or be a function or otherwise need a PLT.  */
1285
                    BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1286
                                || info->shared
1287
                                || h->def_regular
1288
                                || h->type == STT_FUNC
1289
                                || h->needs_plt
1290
                                || h->root.type == bfd_link_hash_undefweak);
1291
 
1292
                    /* This is actually a static link, or it is a
1293
                       -Bsymbolic link and the symbol is defined locally,
1294
                       or is undefweak, or the symbol was forced to be
1295
                       local because of a version file, or we're not
1296
                       creating a dynamic object.  We must initialize this
1297
                       entry in the global offset table.  Since the offset
1298
                       must always be a multiple of 4, we use the least
1299
                       significant bit to record whether we have
1300
                       initialized it already.
1301
 
1302
                       If this GOT entry should be runtime-initialized, we
1303
                       will create a .rela.got relocation entry to
1304
                       initialize the value.  This is done in the
1305
                       finish_dynamic_symbol routine.  */
1306
                    if ((off & 1) != 0)
1307
                      off &= ~1;
1308
                    else
1309
                      {
1310
                        bfd_put_32 (output_bfd, relocation,
1311
                                    sgot->contents + off);
1312
                        h->got.offset |= 1;
1313
                      }
1314
                  }
1315
              }
1316
            else
1317
              {
1318
                BFD_ASSERT (local_got_offsets != NULL
1319
                            && local_got_offsets[r_symndx] != (bfd_vma) -1);
1320
 
1321
                off = local_got_offsets[r_symndx];
1322
 
1323
                /* The offset must always be a multiple of 4.  We use
1324
                   the least significant bit to record whether we have
1325
                   already generated the necessary reloc.  */
1326
                if ((off & 1) != 0)
1327
                  off &= ~1;
1328
                else
1329
                  {
1330
                    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1331
 
1332
                    if (info->shared)
1333
                      {
1334
                        Elf_Internal_Rela outrel;
1335
                        bfd_byte *loc;
1336
 
1337
                        if (srelgot == NULL)
1338
                          srelgot
1339
                            = bfd_get_section_by_name (dynobj, ".rela.got");
1340
                        BFD_ASSERT (srelgot != NULL);
1341
 
1342
                        outrel.r_offset = (sgot->output_section->vma
1343
                                           + sgot->output_offset
1344
                                           + off);
1345
                        outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1346
                        outrel.r_addend = relocation;
1347
                        loc = srelgot->contents;
1348
                        loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1349
                        bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1350
                      }
1351
 
1352
                    local_got_offsets[r_symndx] |= 1;
1353
                  }
1354
              }
1355
 
1356
            relocation = sgot->output_offset + off;
1357
            if (rel->r_addend != 0)
1358
              {
1359
                /* We can't do anything for a relocation which is against
1360
                   a symbol *plus offset*.  GOT holds relocations for
1361
                   symbols.  Make this an error; the compiler isn't
1362
                   allowed to pass us these kinds of things.  */
1363
                if (h == NULL)
1364
                  (*_bfd_error_handler)
1365
                    (_("%B, section %A: relocation %s with non-zero addend %d"
1366
                       " against local symbol"),
1367
                     input_bfd,
1368
                     input_section,
1369
                     cris_elf_howto_table[r_type].name,
1370
                     rel->r_addend);
1371
                else
1372
                  (*_bfd_error_handler)
1373
                    (_("%B, section %A: relocation %s with non-zero addend %d"
1374
                       " against symbol `%s'"),
1375
                     input_bfd,
1376
                     input_section,
1377
                     cris_elf_howto_table[r_type].name,
1378
                     rel->r_addend,
1379
                     symname[0] != '\0' ? symname : _("[whose name is lost]"));
1380
 
1381
                bfd_set_error (bfd_error_bad_value);
1382
                return FALSE;
1383
              }
1384
          }
1385
          break;
1386
 
1387
        case R_CRIS_32_GOTREL:
1388
          /* This relocation must only be performed against local symbols.
1389
             It's also ok when we link a program and the symbol is either
1390
             defined in an ordinary (non-DSO) object or is undefined weak.  */
1391
          if (h != NULL
1392
              && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1393
              && !(!info->shared
1394
                   && (h->def_regular
1395
                       || (!h->def_dynamic
1396
                           && h->root.type == bfd_link_hash_undefweak))))
1397
            {
1398
              (*_bfd_error_handler)
1399
                (_("%B, section %A: relocation %s is"
1400
                   " not allowed for global symbol: `%s'"),
1401
                 input_bfd,
1402
                 input_section,
1403
                 cris_elf_howto_table[r_type].name,
1404
                 symname);
1405
              bfd_set_error (bfd_error_bad_value);
1406
              return FALSE;
1407
            }
1408
 
1409
          /* This can happen if we get a link error with the input ELF
1410
             variant mismatching the output variant.  Emit an error so
1411
             it's noticed if it happens elsewhere.  */
1412
          if (sgot == NULL)
1413
            {
1414
              (*_bfd_error_handler)
1415
                (_("%B, section %A: relocation %s with no GOT created"),
1416
                 input_bfd,
1417
                 input_section,
1418
                 cris_elf_howto_table[r_type].name);
1419
              bfd_set_error (bfd_error_bad_value);
1420
              return FALSE;
1421
            }
1422
 
1423
          /* This relocation is like a PC-relative one, except the
1424
             reference point is the location of GOT.  Note that
1425
             sgot->output_offset is not involved in this calculation.  We
1426
             always want the start of entire .got section, not the
1427
             position after the reserved header.  */
1428
          relocation -= sgot->output_section->vma;
1429
          break;
1430
 
1431
        case R_CRIS_32_PLT_PCREL:
1432
          /* Relocation is to the entry for this symbol in the
1433
             procedure linkage table.  */
1434
 
1435
          /* Resolve a PLT_PCREL reloc against a local symbol directly,
1436
             without using the procedure linkage table.  */
1437
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1438
            break;
1439
 
1440
          if (h->plt.offset == (bfd_vma) -1
1441
              || splt == NULL)
1442
            {
1443
              /* We didn't make a PLT entry for this symbol.  This
1444
                 happens when statically linking PIC code, or when
1445
                 using -Bsymbolic.  */
1446
              break;
1447
            }
1448
 
1449
          relocation = (splt->output_section->vma
1450
                        + splt->output_offset
1451
                        + h->plt.offset);
1452
          break;
1453
 
1454
        case R_CRIS_32_PLT_GOTREL:
1455
          /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1456
             start of the .got section.  See also comment at
1457
             R_CRIS_32_GOT.  */
1458
          relocation -= sgot->output_section->vma;
1459
 
1460
          /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1461
             without using the procedure linkage table.  */
1462
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1463
            break;
1464
 
1465
          if (h->plt.offset == (bfd_vma) -1
1466
              || splt == NULL)
1467
            {
1468
              /* We didn't make a PLT entry for this symbol.  This
1469
                 happens when statically linking PIC code, or when
1470
                 using -Bsymbolic.  */
1471
              break;
1472
            }
1473
 
1474
          relocation = (splt->output_section->vma
1475
                        + splt->output_offset
1476
                        + h->plt.offset
1477
                        - sgot->output_section->vma);
1478
          break;
1479
 
1480
        case R_CRIS_8_PCREL:
1481
        case R_CRIS_16_PCREL:
1482
        case R_CRIS_32_PCREL:
1483
          /* If the symbol was local, we need no shlib-specific handling.  */
1484
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1485
              || h->dynindx == -1)
1486
            break;
1487
 
1488
          /* Fall through.  */
1489
        case R_CRIS_8:
1490
        case R_CRIS_16:
1491
        case R_CRIS_32:
1492
          if (info->shared
1493
              && r_symndx != 0
1494
              && (input_section->flags & SEC_ALLOC) != 0
1495
              && ((r_type != R_CRIS_8_PCREL
1496
                   && r_type != R_CRIS_16_PCREL
1497
                   && r_type != R_CRIS_32_PCREL)
1498
                  || (!info->symbolic
1499
                      || (h != NULL && !h->def_regular))))
1500
            {
1501
              Elf_Internal_Rela outrel;
1502
              bfd_byte *loc;
1503
              bfd_boolean skip, relocate;
1504
 
1505
              /* When generating a shared object, these relocations
1506
                 are copied into the output file to be resolved at run
1507
                 time.  */
1508
 
1509
              if (sreloc == NULL)
1510
                {
1511
                  sreloc = _bfd_elf_get_dynamic_reloc_section
1512
                    (input_bfd, input_section, /*rela?*/ TRUE);
1513
                  /* The section should have been created in cris_elf_check_relocs,
1514
                     but that function will not be called for objects which fail in
1515
                     cris_elf_merge_private_bfd_data.  */
1516
                  if (sreloc == NULL)
1517
                    {
1518
                      bfd_set_error (bfd_error_bad_value);
1519
                      return FALSE;
1520
                    }
1521
                }
1522
 
1523
              skip = FALSE;
1524
              relocate = FALSE;
1525
 
1526
              outrel.r_offset =
1527
                _bfd_elf_section_offset (output_bfd, info, input_section,
1528
                                         rel->r_offset);
1529
              if (outrel.r_offset == (bfd_vma) -1)
1530
                skip = TRUE;
1531
              else if (outrel.r_offset == (bfd_vma) -2
1532
                       /* For now, undefined weak symbols with non-default
1533
                          visibility (yielding 0), like exception info for
1534
                          discarded sections, will get a R_CRIS_NONE
1535
                          relocation rather than no relocation, because we
1536
                          notice too late that the symbol doesn't need a
1537
                          relocation.  */
1538
                       || (h != NULL
1539
                           && h->root.type == bfd_link_hash_undefweak
1540
                           && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1541
                skip = TRUE, relocate = TRUE;
1542
              outrel.r_offset += (input_section->output_section->vma
1543
                                  + input_section->output_offset);
1544
 
1545
              if (skip)
1546
                memset (&outrel, 0, sizeof outrel);
1547
              /* h->dynindx may be -1 if the symbol was marked to
1548
                 become local.  */
1549
              else if (h != NULL
1550
                       && ((! info->symbolic && h->dynindx != -1)
1551
                           || !h->def_regular))
1552
                {
1553
                  BFD_ASSERT (h->dynindx != -1);
1554
                  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1555
                  outrel.r_addend = relocation + rel->r_addend;
1556
                }
1557
              else
1558
                {
1559
                  outrel.r_addend = relocation + rel->r_addend;
1560
 
1561
                  if (r_type == R_CRIS_32)
1562
                    {
1563
                      relocate = TRUE;
1564
                      outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1565
                    }
1566
                  else
1567
                    {
1568
                      long indx;
1569
 
1570
                      if (bfd_is_abs_section (sec))
1571
                        indx = 0;
1572
                      else if (sec == NULL || sec->owner == NULL)
1573
                        {
1574
                          bfd_set_error (bfd_error_bad_value);
1575
                          return FALSE;
1576
                        }
1577
                      else
1578
                        {
1579
                          asection *osec;
1580
 
1581
                          /* We are turning this relocation into one
1582
                             against a section symbol.  It would be
1583
                             proper to subtract the symbol's value,
1584
                             osec->vma, from the emitted reloc addend,
1585
                             but ld.so expects buggy relocs.  */
1586
                          osec = sec->output_section;
1587
                          indx = elf_section_data (osec)->dynindx;
1588
                          if (indx == 0)
1589
                            {
1590
                              struct elf_cris_link_hash_table *htab;
1591
                              htab = elf_cris_hash_table (info);
1592
                              osec = htab->root.text_index_section;
1593
                              indx = elf_section_data (osec)->dynindx;
1594
                            }
1595
                          BFD_ASSERT (indx != 0);
1596
                        }
1597
 
1598
                      outrel.r_info = ELF32_R_INFO (indx, r_type);
1599
                    }
1600
                }
1601
 
1602
              loc = sreloc->contents;
1603
              loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1604
              bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1605
 
1606
              /* This reloc will be computed at runtime, so there's no
1607
                 need to do anything now, except for R_CRIS_32 relocations
1608
                 that have been turned into R_CRIS_RELATIVE.  */
1609
              if (!relocate)
1610
                continue;
1611
            }
1612
 
1613
          break;
1614
 
1615
        case R_CRIS_16_DTPREL:
1616
        case R_CRIS_32_DTPREL:
1617
          /* This relocation must only be performed against local
1618
             symbols, or to sections that are not loadable.  It's also
1619
             ok when we link a program and the symbol is defined in an
1620
             ordinary (non-DSO) object (if it's undefined there, we've
1621
             already seen an error).  */
1622
          if (h != NULL
1623
              && (input_section->flags & SEC_ALLOC) != 0
1624
              && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1625
              && (info->shared
1626
                  || (!h->def_regular
1627
                      && h->root.type != bfd_link_hash_undefined)))
1628
            {
1629
              (*_bfd_error_handler)
1630
                ((h->root.type == bfd_link_hash_undefined)
1631
                 /* We shouldn't get here for GCC-emitted code.  */
1632
                 ? _("%B, section %A: relocation %s has an undefined"
1633
                     " reference to `%s', perhaps a declaration mixup?")
1634
                 : ("%B, section %A: relocation %s is"
1635
                     " not allowed for `%s', a global symbol with default"
1636
                     " visibility, perhaps a declaration mixup?"),
1637
                 input_bfd,
1638
                 input_section,
1639
                 cris_elf_howto_table[r_type].name,
1640
                 symname != NULL && symname[0] != '\0'
1641
                 ? symname : _("[whose name is lost]"));
1642
              bfd_set_error (bfd_error_bad_value);
1643
              return FALSE;
1644
            }
1645
 
1646
          BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1647
                      || elf_cris_hash_table (info)->dtpmod_refcount != 0);
1648
 
1649
          /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1650
             already done so.  Note that we do this in .got.plt, not
1651
             in .got, as .got.plt contains the first part, still the
1652
             reloc is against .got, because the linker script directs
1653
             (is required to direct) them both into .got.  */
1654
          if (elf_cris_hash_table (info)->dtpmod_refcount > 0
1655
              && (input_section->flags & SEC_ALLOC) != 0)
1656
            {
1657
              asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1658
              BFD_ASSERT (sgotplt != NULL);
1659
 
1660
              if (info->shared)
1661
                {
1662
                  Elf_Internal_Rela outrel;
1663
                  bfd_byte *loc;
1664
 
1665
                  if (srelgot == NULL)
1666
                    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1667
                  BFD_ASSERT (srelgot != NULL);
1668
                  loc = srelgot->contents;
1669
                  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1670
 
1671
                  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1672
                  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1673
                  outrel.r_offset = (sgotplt->output_section->vma
1674
                                     + sgotplt->output_offset
1675
                                     + 12);
1676
                  outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1677
                  outrel.r_addend = 0;
1678
                  bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1679
                }
1680
              else
1681
                {
1682
                  /* For an executable, the GOT entry contents is known.  */
1683
                  bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1684
                  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1685
                }
1686
 
1687
              /* Reverse the sign to mark that we've emitted the
1688
                 required GOT entry.  */
1689
              elf_cris_hash_table (info)->dtpmod_refcount
1690
                = -elf_cris_hash_table (info)->dtpmod_refcount;
1691
            }
1692
 
1693
          /* The relocation is the offset from the start of the module
1694
             TLS block to the (local) symbol.  */
1695
          relocation -= elf_hash_table (info)->tls_sec == NULL
1696
            ? 0 : elf_hash_table (info)->tls_sec->vma;
1697
          break;
1698
 
1699
        case R_CRIS_32_GD:
1700
          if (info->shared)
1701
            {
1702
              bfd_set_error (bfd_error_invalid_operation);
1703
 
1704
              /* We've already informed in cris_elf_check_relocs that
1705
                 this is an error.  */
1706
              return FALSE;
1707
            }
1708
          /* Fall through.  */
1709
 
1710
        case R_CRIS_16_GOT_GD:
1711
        case R_CRIS_32_GOT_GD:
1712
          if (rel->r_addend != 0)
1713
            {
1714
              /* We can't do anything for a relocation which is against a
1715
                 symbol *plus offset*.  The GOT holds relocations for
1716
                 symbols.  Make this an error; the compiler isn't allowed
1717
                 to pass us these kinds of things.  */
1718
              (*_bfd_error_handler)
1719
                (_("%B, section %A: relocation %s with non-zero addend %d"
1720
                   " against symbol `%s'"),
1721
                 input_bfd,
1722
                 input_section,
1723
                 cris_elf_howto_table[r_type].name,
1724
                 rel->r_addend,
1725
                 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1726
 
1727
              bfd_set_error (bfd_error_bad_value);
1728
              return FALSE;
1729
            }
1730
 
1731
          if (!info->shared
1732
              && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1733
            {
1734
              /* Known contents of the GOT.  */
1735
              bfd_vma off;
1736
 
1737
              /* The symbol is defined in the program, so just write
1738
                 (1, known_tpoffset) into the GOT.  */
1739
              relocation -= elf_hash_table (info)->tls_sec->vma;
1740
 
1741
              if (h != NULL)
1742
                {
1743
                  off = elf_cris_hash_entry (h)->tprel_refcount > 0
1744
                    ? h->got.offset + 4 : h->got.offset;
1745
                }
1746
              else
1747
                {
1748
                  off = local_got_offsets[r_symndx];
1749
                  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1750
                    off += 4;
1751
                }
1752
 
1753
              /* We use bit 1 of the offset as a flag for GOT entry with
1754
                 the R_CRIS_DTP reloc, setting it when we've emitted the
1755
                 GOT entry and reloc.  Bit 0 is used for R_CRIS_32_TPREL
1756
                 relocs.  */
1757
              if ((off & 2) == 0)
1758
                {
1759
                  off &= ~3;
1760
 
1761
                  if (h != NULL)
1762
                    h->got.offset |= 2;
1763
                  else
1764
                    local_got_offsets[r_symndx] |= 2;
1765
 
1766
                  bfd_put_32 (output_bfd, 1, sgot->contents + off);
1767
                  bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1768
                }
1769
              else
1770
                off &= ~3;
1771
 
1772
              relocation = sgot->output_offset + off
1773
                + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1774
            }
1775
          else
1776
            {
1777
              /* Not all parts of the GOT entry are known; emit a real
1778
                 relocation.  */
1779
              bfd_vma off;
1780
 
1781
              if (h != NULL)
1782
                off = elf_cris_hash_entry (h)->tprel_refcount > 0
1783
                  ? h->got.offset + 4 : h->got.offset;
1784
              else
1785
                {
1786
                  off = local_got_offsets[r_symndx];
1787
                  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1788
                    off += 4;
1789
                }
1790
 
1791
              /* See above re bit 1 and bit 0 usage.  */
1792
              if ((off & 2) == 0)
1793
                {
1794
                  Elf_Internal_Rela outrel;
1795
                  bfd_byte *loc;
1796
 
1797
                  off &= ~3;
1798
 
1799
                  if (h != NULL)
1800
                    h->got.offset |= 2;
1801
                  else
1802
                    local_got_offsets[r_symndx] |= 2;
1803
 
1804
                  /* Clear the target contents of the GOT (just as a
1805
                     gesture; it's already cleared on allocation): this
1806
                     relocation is not like the other dynrelocs.  */
1807
                  bfd_put_32 (output_bfd, 0, sgot->contents + off);
1808
                  bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1809
 
1810
                  if (srelgot == NULL)
1811
                    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1812
                  BFD_ASSERT (srelgot != NULL);
1813
 
1814
                  if (h != NULL && h->dynindx != -1)
1815
                    {
1816
                      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1817
                      relocation = 0;
1818
                    }
1819
                  else
1820
                    {
1821
                      outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1822
 
1823
                      /* NULL if we had an error.  */
1824
                      relocation -= elf_hash_table (info)->tls_sec == NULL
1825
                        ? 0 : elf_hash_table (info)->tls_sec->vma;
1826
                    }
1827
 
1828
                  outrel.r_offset = (sgot->output_section->vma
1829
                                     + sgot->output_offset
1830
                                     + off);
1831
                  outrel.r_addend = relocation;
1832
                  loc = srelgot->contents;
1833
                  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1834
 
1835
                  /* NULL if we had an error.  */
1836
                  if (srelgot->contents != NULL)
1837
                    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1838
                }
1839
              else
1840
                off &= ~3;
1841
 
1842
              relocation = sgot->output_offset + off
1843
                + (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1844
            }
1845
 
1846
          /* The GOT-relative offset to the GOT entry is the
1847
             relocation, or for R_CRIS_32_GD, the actual address of
1848
             the GOT entry.  */
1849
          break;
1850
 
1851
        case R_CRIS_32_IE:
1852
          if (info->shared)
1853
            {
1854
              bfd_set_error (bfd_error_invalid_operation);
1855
 
1856
              /* We've already informed in cris_elf_check_relocs that
1857
                 this is an error.  */
1858
              return FALSE;
1859
            }
1860
          /* Fall through.  */
1861
 
1862
        case R_CRIS_32_GOT_TPREL:
1863
        case R_CRIS_16_GOT_TPREL:
1864
          if (rel->r_addend != 0)
1865
            {
1866
              /* We can't do anything for a relocation which is
1867
                 against a symbol *plus offset*.  GOT holds
1868
                 relocations for symbols.  Make this an error; the
1869
                 compiler isn't allowed to pass us these kinds of
1870
                 things.  */
1871
              (*_bfd_error_handler)
1872
                (_("%B, section %A: relocation %s with non-zero addend %d"
1873
                   " against symbol `%s'"),
1874
                 input_bfd,
1875
                 input_section,
1876
                 cris_elf_howto_table[r_type].name,
1877
                 rel->r_addend,
1878
                 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1879
              bfd_set_error (bfd_error_bad_value);
1880
              return FALSE;
1881
            }
1882
 
1883
          if (!info->shared && (h == NULL || h->def_regular))
1884
            {
1885
              /* Known contents of the GOT.  */
1886
              bfd_vma off;
1887
 
1888
              /* The symbol is defined in the program, so just write
1889
                 the -prog_tls_size+known_tpoffset into the GOT.  */
1890
              relocation -= elf_hash_table (info)->tls_sec->vma;
1891
              relocation -= elf_hash_table (info)->tls_size;
1892
 
1893
              if (h != NULL)
1894
                off = h->got.offset;
1895
              else
1896
                off = local_got_offsets[r_symndx];
1897
 
1898
              /* Bit 0 is used to mark whether we've emitted the required
1899
                 entry (and if needed R_CRIS_32_TPREL reloc).  Bit 1
1900
                 is used similarly for R_CRIS_DTP, see above.  */
1901
              if ((off & 1) == 0)
1902
                {
1903
                  off &= ~3;
1904
 
1905
                  if (h != NULL)
1906
                    h->got.offset |= 1;
1907
                  else
1908
                    local_got_offsets[r_symndx] |= 1;
1909
 
1910
                  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1911
                }
1912
              else
1913
                off &= ~3;
1914
 
1915
              relocation = sgot->output_offset + off
1916
                + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1917
            }
1918
          else
1919
            {
1920
              /* Emit a real relocation.  */
1921
              bfd_vma off;
1922
 
1923
              if (h != NULL)
1924
                off = h->got.offset;
1925
              else
1926
                off = local_got_offsets[r_symndx];
1927
 
1928
              /* See above re usage of bit 0 and 1.  */
1929
              if ((off & 1) == 0)
1930
                {
1931
                  Elf_Internal_Rela outrel;
1932
                  bfd_byte *loc;
1933
 
1934
                  off &= ~3;
1935
 
1936
                  if (h != NULL)
1937
                    h->got.offset |= 1;
1938
                  else
1939
                    local_got_offsets[r_symndx] |= 1;
1940
 
1941
                  if (srelgot == NULL)
1942
                    srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1943
                  BFD_ASSERT (srelgot != NULL);
1944
 
1945
                  if (h != NULL && h->dynindx != -1)
1946
                    {
1947
                      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1948
                      relocation = 0;
1949
                    }
1950
                  else
1951
                    {
1952
                      outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1953
 
1954
                      /* NULL if we had an error.  */
1955
                      relocation -= elf_hash_table (info)->tls_sec == NULL
1956
                        ? 0 : elf_hash_table (info)->tls_sec->vma;
1957
                    }
1958
 
1959
                  /* Just "define" the initial contents in some
1960
                     semi-logical way.  */
1961
                  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1962
 
1963
                  outrel.r_offset = (sgot->output_section->vma
1964
                                     + sgot->output_offset
1965
                                     + off);
1966
                  outrel.r_addend = relocation;
1967
                  loc = srelgot->contents;
1968
                  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1969
                  /* NULL if we had an error.  */
1970
                  if (srelgot->contents != NULL)
1971
                    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1972
                }
1973
              else
1974
                off &= ~3;
1975
 
1976
              relocation = sgot->output_offset + off
1977
                + (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1978
            }
1979
 
1980
          /* The GOT-relative offset to the GOT entry is the relocation,
1981
             or for R_CRIS_32_GD, the actual address of the GOT entry.  */
1982
          break;
1983
 
1984
        case R_CRIS_16_TPREL:
1985
        case R_CRIS_32_TPREL:
1986
          /* This relocation must only be performed against symbols
1987
             defined in an ordinary (non-DSO) object.  */
1988
          if (info->shared)
1989
            {
1990
              bfd_set_error (bfd_error_invalid_operation);
1991
 
1992
              /* We've already informed in cris_elf_check_relocs that
1993
                 this is an error.  */
1994
              return FALSE;
1995
            }
1996
 
1997
          if (h != NULL
1998
              && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1999
              && !(h->def_regular || ELF_COMMON_DEF_P (h))
2000
              /* If it's undefined, then an error message has already
2001
                 been emitted.  */
2002
              && h->root.type != bfd_link_hash_undefined)
2003
            {
2004
              (*_bfd_error_handler)
2005
                (_("%B, section %A: relocation %s is"
2006
                   " not allowed for symbol: `%s'"
2007
                   " which is defined outside the program,"
2008
                   " perhaps a declaration mixup?"),
2009
                 input_bfd,
2010
                 input_section,
2011
                 cris_elf_howto_table[r_type].name,
2012
                 symname);
2013
              bfd_set_error (bfd_error_bad_value);
2014
              return FALSE;
2015
            }
2016
 
2017
          /* NULL if we had an error.  */
2018
          relocation -= elf_hash_table (info)->tls_sec == NULL
2019
            ? 0
2020
            : (elf_hash_table (info)->tls_sec->vma
2021
               + elf_hash_table (info)->tls_size);
2022
 
2023
          /* The TLS-relative offset is the relocation.  */
2024
          break;
2025
 
2026
        default:
2027
          BFD_FAIL ();
2028
          return FALSE;
2029
        }
2030
 
2031
      r = cris_final_link_relocate (howto, input_bfd, input_section,
2032
                                     contents, rel, relocation);
2033
 
2034
      if (r != bfd_reloc_ok)
2035
        {
2036
          const char * msg = (const char *) NULL;
2037
 
2038
          switch (r)
2039
            {
2040
            case bfd_reloc_overflow:
2041
              r = info->callbacks->reloc_overflow
2042
                (info, (h ? &h->root : NULL), symname, howto->name,
2043
                 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2044
              if (additional_relocation_error_msg_count > 0)
2045
                {
2046
                  additional_relocation_error_msg_count--;
2047
                  switch (r_type)
2048
                    {
2049
                    case R_CRIS_16_GOTPLT:
2050
                    case R_CRIS_16_GOT:
2051
 
2052
                      /* Not just TLS is involved here, so we make
2053
                         generation and message depend on -fPIC/-fpic
2054
                         only.  */
2055
                    case R_CRIS_16_GOT_TPREL:
2056
                    case R_CRIS_16_GOT_GD:
2057
                      (*_bfd_error_handler)
2058
                        (_("(too many global variables for -fpic:"
2059
                           " recompile with -fPIC)"));
2060
                      break;
2061
 
2062
                    case R_CRIS_16_TPREL:
2063
                    case R_CRIS_16_DTPREL:
2064
                      (*_bfd_error_handler)
2065
                        (_("(thread-local data too big for -fpic or"
2066
                           " -msmall-tls: recompile with -fPIC or"
2067
                           " -mno-small-tls)"));
2068
                      break;
2069
 
2070
                      /* No known cause for overflow for other relocs.  */
2071
                    default:
2072
                      break;
2073
                    }
2074
                }
2075
              break;
2076
 
2077
            case bfd_reloc_undefined:
2078
              r = info->callbacks->undefined_symbol
2079
                (info, symname, input_bfd, input_section, rel->r_offset,
2080
                 TRUE);
2081
              break;
2082
 
2083
            case bfd_reloc_outofrange:
2084
              msg = _("internal error: out of range error");
2085
              break;
2086
 
2087
            case bfd_reloc_notsupported:
2088
              msg = _("internal error: unsupported relocation error");
2089
              break;
2090
 
2091
            case bfd_reloc_dangerous:
2092
              msg = _("internal error: dangerous relocation");
2093
              break;
2094
 
2095
            default:
2096
              msg = _("internal error: unknown error");
2097
              break;
2098
            }
2099
 
2100
          if (msg)
2101
            r = info->callbacks->warning
2102
              (info, msg, symname, input_bfd, input_section, rel->r_offset);
2103
 
2104
          if (! r)
2105
            return FALSE;
2106
        }
2107
    }
2108
 
2109
  return TRUE;
2110
}
2111
 
2112
/* Finish up dynamic symbol handling.  We set the contents of various
2113
   dynamic sections here.  */
2114
 
2115
static bfd_boolean
2116
elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
2117
     bfd *output_bfd;
2118
     struct bfd_link_info *info;
2119
     struct elf_link_hash_entry *h;
2120
     Elf_Internal_Sym *sym;
2121
{
2122
  bfd *dynobj;
2123
 
2124
  /* Where in the plt entry to put values.  */
2125
  int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2126
 
2127
  /* What offset to add to the distance to the first PLT entry for the
2128
     value at plt_off3.   */
2129
  int plt_off3_value_bias = 4;
2130
 
2131
  /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2132
     for PIC and non-PIC for v32 and pre-v32).  */
2133
  int plt_stub_offset = 8;
2134
  int plt_entry_size = PLT_ENTRY_SIZE;
2135
  const bfd_byte *plt_entry = elf_cris_plt_entry;
2136
  const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2137
 
2138
  /* Adjust the various PLT entry offsets.  */
2139
  if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2140
    {
2141
      plt_off2 = 14;
2142
      plt_off3 = 20;
2143
      plt_off3_value_bias = -2;
2144
      plt_stub_offset = 12;
2145
      plt_entry_size = PLT_ENTRY_SIZE_V32;
2146
      plt_entry = elf_cris_plt_entry_v32;
2147
      plt_pic_entry = elf_cris_pic_plt_entry_v32;
2148
    }
2149
 
2150
  dynobj = elf_hash_table (info)->dynobj;
2151
 
2152
  if (h->plt.offset != (bfd_vma) -1)
2153
    {
2154
      asection *splt;
2155
      asection *sgotplt;
2156
      asection *sgot;
2157
      asection *srela;
2158
      bfd_vma got_base;
2159
 
2160
      bfd_vma gotplt_offset
2161
        = elf_cris_hash_entry (h)->gotplt_offset;
2162
      Elf_Internal_Rela rela;
2163
      bfd_byte *loc;
2164
      bfd_boolean has_gotplt = gotplt_offset != 0;
2165
 
2166
      /* Get the index in the .rela.plt relocations for the .got.plt
2167
         entry that corresponds to this symbol.
2168
         We have to count backwards here, and the result is only valid
2169
         as an index into .rela.plt.  We also have to undo the effect
2170
         of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2171
         .got.plt) for which gotplt_offset is adjusted, because while
2172
         that entry goes into .got.plt, its relocation goes into
2173
         .rela.got, not .rela.plt.  (It's not PLT-specific; not to be
2174
         processed as part of the runtime lazy .rela.plt relocation).
2175
         FIXME: There be literal constants here...  */
2176
      bfd_vma rela_plt_index
2177
        = (elf_cris_hash_table (info)->dtpmod_refcount != 0
2178
           ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2179
 
2180
      /* Get the offset into the .got table of the entry that corresponds
2181
         to this function.  Note that we embed knowledge that "incoming"
2182
         .got goes after .got.plt in the output without padding (pointer
2183
         aligned).  However, that knowledge is present in several other
2184
         places too.  */
2185
      bfd_vma got_offset
2186
        = (has_gotplt
2187
           ? gotplt_offset
2188
           : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
2189
 
2190
      /* This symbol has an entry in the procedure linkage table.  Set it
2191
         up.  */
2192
 
2193
      BFD_ASSERT (h->dynindx != -1);
2194
 
2195
      splt = bfd_get_section_by_name (dynobj, ".plt");
2196
      sgot = bfd_get_section_by_name (dynobj, ".got");
2197
      sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
2198
      srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2199
      BFD_ASSERT (splt != NULL && sgotplt != NULL
2200
                  && (! has_gotplt || srela != NULL));
2201
 
2202
      got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2203
 
2204
      /* Fill in the entry in the procedure linkage table.  */
2205
      if (! info->shared)
2206
        {
2207
          memcpy (splt->contents + h->plt.offset, plt_entry,
2208
                  plt_entry_size);
2209
 
2210
          /* We need to enter the absolute address of the GOT entry here.  */
2211
          bfd_put_32 (output_bfd, got_base + got_offset,
2212
                      splt->contents + h->plt.offset + plt_off1);
2213
        }
2214
      else
2215
        {
2216
          memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2217
                  plt_entry_size);
2218
          bfd_put_32 (output_bfd, got_offset,
2219
                      splt->contents + h->plt.offset + plt_off1);
2220
        }
2221
 
2222
      /* Fill in the plt entry and make a relocation, if this is a "real"
2223
         PLT entry.  */
2224
      if (has_gotplt)
2225
        {
2226
          /* Fill in the offset to the reloc table.  */
2227
          bfd_put_32 (output_bfd,
2228
                      rela_plt_index * sizeof (Elf32_External_Rela),
2229
                      splt->contents + h->plt.offset + plt_off2);
2230
 
2231
          /* Fill in the offset to the first PLT entry, where to "jump".  */
2232
          bfd_put_32 (output_bfd,
2233
                      - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2234
                      splt->contents + h->plt.offset + plt_off3);
2235
 
2236
          /* Fill in the entry in the global offset table with the address of
2237
             the relocating stub.  */
2238
          bfd_put_32 (output_bfd,
2239
                      (splt->output_section->vma
2240
                       + splt->output_offset
2241
                       + h->plt.offset
2242
                       + plt_stub_offset),
2243
                      sgotplt->contents + got_offset);
2244
 
2245
          /* Fill in the entry in the .rela.plt section.  */
2246
          rela.r_offset = (sgotplt->output_section->vma
2247
                           + sgotplt->output_offset
2248
                           + got_offset);
2249
          rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2250
          rela.r_addend = 0;
2251
          loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2252
          bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2253
        }
2254
 
2255
      if (!h->def_regular)
2256
        {
2257
          /* Mark the symbol as undefined, rather than as defined in
2258
             the .plt section.  Leave the value alone.  */
2259
          sym->st_shndx = SHN_UNDEF;
2260
 
2261
          /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
2262
             know whether resetting the value is significant; if it really
2263
             is, rather than a quirk or bug in the sparc port, then I
2264
             believe we'd see this elsewhere.  */
2265
          /* If the symbol is weak, we do need to clear the value.
2266
             Otherwise, the PLT entry would provide a definition for
2267
             the symbol even if the symbol wasn't defined anywhere,
2268
             and so the symbol would never be NULL.  */
2269
          if (!h->ref_regular_nonweak)
2270
            sym->st_value = 0;
2271
        }
2272
    }
2273
 
2274
  /* For an ordinary program, we emit .got relocs only for symbols that
2275
     are in the dynamic-symbols table and are either defined by the
2276
     program or are undefined weak symbols, or are function symbols
2277
     where we do not output a PLT: the PLT reloc was output above and all
2278
     references to the function symbol are redirected to the PLT.  */
2279
  if (h->got.offset != (bfd_vma) -1
2280
      && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2281
      && (info->shared
2282
          || (h->dynindx != -1
2283
              && h->plt.offset == (bfd_vma) -1
2284
              && !h->def_regular
2285
              && h->root.type != bfd_link_hash_undefweak)))
2286
    {
2287
      asection *sgot;
2288
      asection *srela;
2289
      Elf_Internal_Rela rela;
2290
      bfd_byte *loc;
2291
      bfd_byte *where;
2292
 
2293
      /* This symbol has an entry in the global offset table.  Set it up.  */
2294
 
2295
      sgot = bfd_get_section_by_name (dynobj, ".got");
2296
      srela = bfd_get_section_by_name (dynobj, ".rela.got");
2297
      BFD_ASSERT (sgot != NULL && srela != NULL);
2298
 
2299
      rela.r_offset = (sgot->output_section->vma
2300
                       + sgot->output_offset
2301
                       + (h->got.offset &~ (bfd_vma) 1));
2302
 
2303
      /* If this is a static link, or it is a -Bsymbolic link and the
2304
         symbol is defined locally or was forced to be local because
2305
         of a version file, we just want to emit a RELATIVE reloc.
2306
         The entry in the global offset table will already have been
2307
         initialized in the relocate_section function.  */
2308
      where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2309
      if (! elf_hash_table (info)->dynamic_sections_created
2310
          || (info->shared
2311
              && (info->symbolic || h->dynindx == -1)
2312
              && h->def_regular))
2313
        {
2314
          rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2315
          rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2316
        }
2317
      else
2318
        {
2319
          bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2320
          rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2321
          rela.r_addend = 0;
2322
        }
2323
 
2324
      loc = srela->contents;
2325
      loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2326
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2327
    }
2328
 
2329
  if (h->needs_copy)
2330
    {
2331
      asection *s;
2332
      Elf_Internal_Rela rela;
2333
      bfd_byte *loc;
2334
 
2335
      /* This symbol needs a copy reloc.  Set it up.  */
2336
 
2337
      BFD_ASSERT (h->dynindx != -1
2338
                  && (h->root.type == bfd_link_hash_defined
2339
                      || h->root.type == bfd_link_hash_defweak));
2340
 
2341
      s = bfd_get_section_by_name (h->root.u.def.section->owner,
2342
                                   ".rela.bss");
2343
      BFD_ASSERT (s != NULL);
2344
 
2345
      rela.r_offset = (h->root.u.def.value
2346
                       + h->root.u.def.section->output_section->vma
2347
                       + h->root.u.def.section->output_offset);
2348
      rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2349
      rela.r_addend = 0;
2350
      loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2351
      bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2352
    }
2353
 
2354
  /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
2355
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2356
      || h == elf_hash_table (info)->hgot)
2357
    sym->st_shndx = SHN_ABS;
2358
 
2359
  return TRUE;
2360
}
2361
 
2362
/* Finish up the dynamic sections.  Do *not* emit relocs here, as their
2363
   offsets were changed, as part of -z combreloc handling, from those we
2364
   computed.  */
2365
 
2366
static bfd_boolean
2367
elf_cris_finish_dynamic_sections (output_bfd, info)
2368
     bfd *output_bfd;
2369
     struct bfd_link_info *info;
2370
{
2371
  bfd *dynobj;
2372
  asection *sgot;
2373
  asection *sdyn;
2374
 
2375
  dynobj = elf_hash_table (info)->dynobj;
2376
 
2377
  sgot = bfd_get_section_by_name (dynobj, ".got.plt");
2378
  BFD_ASSERT (sgot != NULL);
2379
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2380
 
2381
  if (elf_hash_table (info)->dynamic_sections_created)
2382
    {
2383
      asection *splt;
2384
      Elf32_External_Dyn *dyncon, *dynconend;
2385
 
2386
      splt = bfd_get_section_by_name (dynobj, ".plt");
2387
      BFD_ASSERT (splt != NULL && sdyn != NULL);
2388
 
2389
      dyncon = (Elf32_External_Dyn *) sdyn->contents;
2390
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2391
      for (; dyncon < dynconend; dyncon++)
2392
        {
2393
          Elf_Internal_Dyn dyn;
2394
          asection *s;
2395
 
2396
          bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2397
 
2398
          switch (dyn.d_tag)
2399
            {
2400
            default:
2401
              break;
2402
 
2403
            case DT_PLTGOT:
2404
              s = bfd_get_section_by_name (output_bfd, ".got");
2405
              BFD_ASSERT (s != NULL);
2406
              dyn.d_un.d_ptr = s->vma;
2407
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2408
              break;
2409
 
2410
            case DT_JMPREL:
2411
              /* Yes, we *can* have a .plt and no .plt.rela, for instance
2412
                 if all symbols are found in the .got (not .got.plt).  */
2413
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2414
              dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2415
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2416
              break;
2417
 
2418
            case DT_PLTRELSZ:
2419
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2420
              if (s == NULL)
2421
                dyn.d_un.d_val = 0;
2422
              else
2423
                dyn.d_un.d_val = s->size;
2424
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2425
              break;
2426
 
2427
            case DT_RELASZ:
2428
              /* The procedure linkage table relocs (DT_JMPREL) should
2429
                 not be included in the overall relocs (DT_RELA).
2430
                 Therefore, we override the DT_RELASZ entry here to
2431
                 make it not include the JMPREL relocs.  Since the
2432
                 linker script arranges for .rela.plt to follow all
2433
                 other relocation sections, we don't have to worry
2434
                 about changing the DT_RELA entry.  */
2435
              s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2436
              if (s != NULL)
2437
                dyn.d_un.d_val -= s->size;
2438
              bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2439
              break;
2440
            }
2441
        }
2442
 
2443
      /* Fill in the first entry in the procedure linkage table.  */
2444
      if (splt->size > 0)
2445
        {
2446
          if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2447
            {
2448
              if (info->shared)
2449
                memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2450
                        PLT_ENTRY_SIZE_V32);
2451
              else
2452
                {
2453
                  memcpy (splt->contents, elf_cris_plt0_entry_v32,
2454
                          PLT_ENTRY_SIZE_V32);
2455
                  bfd_put_32 (output_bfd,
2456
                              sgot->output_section->vma
2457
                              + sgot->output_offset + 4,
2458
                              splt->contents + 4);
2459
 
2460
                  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2461
                    = PLT_ENTRY_SIZE_V32;
2462
                }
2463
            }
2464
          else
2465
            {
2466
              if (info->shared)
2467
                memcpy (splt->contents, elf_cris_pic_plt0_entry,
2468
                        PLT_ENTRY_SIZE);
2469
              else
2470
                {
2471
                  memcpy (splt->contents, elf_cris_plt0_entry,
2472
                          PLT_ENTRY_SIZE);
2473
                  bfd_put_32 (output_bfd,
2474
                              sgot->output_section->vma
2475
                              + sgot->output_offset + 4,
2476
                              splt->contents + 6);
2477
                  bfd_put_32 (output_bfd,
2478
                              sgot->output_section->vma
2479
                              + sgot->output_offset + 8,
2480
                              splt->contents + 14);
2481
 
2482
                  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2483
                    = PLT_ENTRY_SIZE;
2484
                }
2485
            }
2486
        }
2487
    }
2488
 
2489
  /* Fill in the first three entries in the global offset table.  */
2490
  if (sgot->size > 0)
2491
    {
2492
      if (sdyn == NULL)
2493
        bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2494
      else
2495
        bfd_put_32 (output_bfd,
2496
                    sdyn->output_section->vma + sdyn->output_offset,
2497
                    sgot->contents);
2498
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2499
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2500
    }
2501
 
2502
  elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2503
 
2504
  return TRUE;
2505
}
2506
 
2507
/* Return the section that should be marked against GC for a given
2508
   relocation.  */
2509
 
2510
static asection *
2511
cris_elf_gc_mark_hook (asection *sec,
2512
                       struct bfd_link_info *info,
2513
                       Elf_Internal_Rela *rel,
2514
                       struct elf_link_hash_entry *h,
2515
                       Elf_Internal_Sym *sym)
2516
{
2517
  enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2518
  if (h != NULL)
2519
    switch (r_type)
2520
      {
2521
      case R_CRIS_GNU_VTINHERIT:
2522
      case R_CRIS_GNU_VTENTRY:
2523
        return NULL;
2524
 
2525
      default:
2526
        break;
2527
      }
2528
 
2529
  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2530
}
2531
 
2532
/* Update the got entry reference counts for the section being removed.  */
2533
 
2534
static bfd_boolean
2535
cris_elf_gc_sweep_hook (bfd *abfd,
2536
                        struct bfd_link_info *info,
2537
                        asection *sec,
2538
                        const Elf_Internal_Rela *relocs)
2539
{
2540
  Elf_Internal_Shdr *symtab_hdr;
2541
  struct elf_link_hash_entry **sym_hashes;
2542
  bfd_signed_vma *local_got_refcounts;
2543
  const Elf_Internal_Rela *rel, *relend;
2544
  bfd *dynobj;
2545
  asection *sgot;
2546
  asection *srelgot;
2547
 
2548
  if (info->relocatable)
2549
    return TRUE;
2550
 
2551
  dynobj = elf_hash_table (info)->dynobj;
2552
  if (dynobj == NULL)
2553
    return TRUE;
2554
 
2555
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2556
  sym_hashes = elf_sym_hashes (abfd);
2557
  local_got_refcounts = elf_local_got_refcounts (abfd);
2558
 
2559
  sgot = bfd_get_section_by_name (dynobj, ".got");
2560
  srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2561
 
2562
  relend = relocs + sec->reloc_count;
2563
  for (rel = relocs; rel < relend; rel++)
2564
    {
2565
      unsigned long r_symndx;
2566
      struct elf_link_hash_entry *h = NULL;
2567
      bfd_signed_vma got_element_size = 4;
2568
      bfd_signed_vma *specific_refcount = NULL;
2569
      enum elf_cris_reloc_type r_type;
2570
 
2571
      r_symndx = ELF32_R_SYM (rel->r_info);
2572
      if (r_symndx >= symtab_hdr->sh_info)
2573
        {
2574
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2575
          while (h->root.type == bfd_link_hash_indirect
2576
                 || h->root.type == bfd_link_hash_warning)
2577
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
2578
        }
2579
 
2580
      r_type = ELF32_R_TYPE (rel->r_info);
2581
      switch (r_type)
2582
        {
2583
        case R_CRIS_32_GOT:
2584
        case R_CRIS_16_GOT:
2585
        case R_CRIS_16_GOTPLT:
2586
        case R_CRIS_32_GOTPLT:
2587
          specific_refcount = h != NULL
2588
            ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2589
            : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2590
          break;
2591
 
2592
        case R_CRIS_32_GD:
2593
        case R_CRIS_32_GOT_GD:
2594
        case R_CRIS_16_GOT_GD:
2595
          got_element_size = 8;
2596
          specific_refcount = h != NULL
2597
            ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2598
            : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2599
          break;
2600
 
2601
        case R_CRIS_32_IE:
2602
        case R_CRIS_16_GOT_TPREL:
2603
        case R_CRIS_32_GOT_TPREL:
2604
          specific_refcount = h != NULL
2605
            ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2606
            : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2607
          break;
2608
 
2609
        default:
2610
          break;
2611
        }
2612
 
2613
      switch (r_type)
2614
        {
2615
        case R_CRIS_32_IE:
2616
        case R_CRIS_32_GD:
2617
        case R_CRIS_16_GOT_TPREL:
2618
        case R_CRIS_32_GOT_TPREL:
2619
        case R_CRIS_32_GOT_GD:
2620
        case R_CRIS_16_GOT_GD:
2621
        case R_CRIS_16_GOT:
2622
        case R_CRIS_32_GOT:
2623
          if (h != NULL)
2624
            {
2625
              /* If the counters are 0 when we got here, we've
2626
                 miscounted somehow somewhere, an internal error.  */
2627
              BFD_ASSERT (h->got.refcount > 0);
2628
              --h->got.refcount;
2629
 
2630
              BFD_ASSERT (*specific_refcount > 0);
2631
              --*specific_refcount;
2632
              if (*specific_refcount == 0)
2633
                {
2634
                  /* We don't need the .got entry any more.  */
2635
                  sgot->size -= got_element_size;
2636
                  srelgot->size -= sizeof (Elf32_External_Rela);
2637
                }
2638
              break;
2639
            }
2640
 
2641
        local_got_reloc:
2642
          if (local_got_refcounts != NULL)
2643
            {
2644
              /* If the counters are 0 when we got here, we've
2645
                 miscounted somehow somewhere, an internal error.  */
2646
              BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2647
              --local_got_refcounts[r_symndx];
2648
 
2649
              BFD_ASSERT (*specific_refcount > 0);
2650
              --*specific_refcount;
2651
              if (*specific_refcount == 0)
2652
                {
2653
                  /* We don't need the .got entry any more.  */
2654
                  sgot->size -= got_element_size;
2655
                  if (info->shared)
2656
                    srelgot->size -= sizeof (Elf32_External_Rela);
2657
                }
2658
            }
2659
          break;
2660
 
2661
        case R_CRIS_16_GOTPLT:
2662
        case R_CRIS_32_GOTPLT:
2663
          /* For local symbols, treat these like GOT relocs.  */
2664
          if (h == NULL)
2665
            goto local_got_reloc;
2666
          /* Fall through.  */
2667
 
2668
        case R_CRIS_32_PLT_GOTREL:
2669
          /* FIXME: We don't garbage-collect away the .got section.  */
2670
          if (local_got_refcounts != NULL)
2671
            local_got_refcounts[-1]--;
2672
          /* Fall through.  */
2673
 
2674
        case R_CRIS_8_PCREL:
2675
        case R_CRIS_16_PCREL:
2676
        case R_CRIS_32_PCREL:
2677
        case R_CRIS_32_PLT_PCREL:
2678
          if (h != NULL)
2679
            {
2680
              if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2681
                  && h->plt.refcount > 0)
2682
                --h->plt.refcount;
2683
            }
2684
          break;
2685
 
2686
        case R_CRIS_32_DTPREL:
2687
          /* This'd be a .dtpreld entry in e.g. debug info.  */
2688
          if ((sec->flags & SEC_ALLOC) == 0)
2689
            break;
2690
          /* Fall through.  */
2691
        case R_CRIS_16_DTPREL:
2692
          elf_cris_hash_table (info)->dtpmod_refcount--;
2693
          if (elf_cris_hash_table (info)->dtpmod_refcount == 0)
2694
            elf_cris_hash_table (info)->next_gotplt_entry -= 8;
2695
          BFD_ASSERT (local_got_refcounts != NULL);
2696
          local_got_refcounts[-1]--;
2697
          break;
2698
 
2699
        default:
2700
          break;
2701
        }
2702
    }
2703
 
2704
  return TRUE;
2705
}
2706
 
2707
/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2708
   entry but we found we will not create any.  Called when we find we will
2709
   not have any PLT for this symbol, by for example
2710
   elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2711
   or elf_cris_size_dynamic_sections if no dynamic sections will be
2712
   created (we're only linking static objects).  */
2713
 
2714
static bfd_boolean
2715
elf_cris_adjust_gotplt_to_got (h, p)
2716
     struct elf_cris_link_hash_entry *h;
2717
     PTR p;
2718
{
2719
  struct bfd_link_info *info = (struct bfd_link_info *) p;
2720
 
2721
  if (h->root.root.type == bfd_link_hash_warning)
2722
    h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2723
 
2724
  /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2725
  if (h->gotplt_refcount <= 0)
2726
    return TRUE;
2727
 
2728
  if (h->reg_got_refcount > 0)
2729
    {
2730
      /* There's a GOT entry for this symbol.  Just adjust the refcounts.
2731
         Probably not necessary at this stage, but keeping them accurate
2732
         helps avoiding surprises later.  */
2733
      h->root.got.refcount += h->gotplt_refcount;
2734
      h->reg_got_refcount += h->gotplt_refcount;
2735
      h->gotplt_refcount = 0;
2736
    }
2737
  else
2738
    {
2739
      /* No GOT entry for this symbol.  We need to create one.  */
2740
      bfd *dynobj = elf_hash_table (info)->dynobj;
2741
      asection *sgot;
2742
      asection *srelgot;
2743
 
2744
      BFD_ASSERT (dynobj != NULL);
2745
      sgot = bfd_get_section_by_name (dynobj, ".got");
2746
      srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2747
 
2748
      /* Put accurate refcounts there.  */
2749
      h->root.got.refcount += h->gotplt_refcount;
2750
      h->reg_got_refcount = h->gotplt_refcount;
2751
 
2752
      h->gotplt_refcount = 0;
2753
 
2754
      /* We always have a .got and a .rela.got section if there were
2755
         GOTPLT relocs in input.  */
2756
      BFD_ASSERT (sgot != NULL && srelgot != NULL);
2757
 
2758
      /* Allocate space in the .got section.  */
2759
      sgot->size += 4;
2760
 
2761
      /* Allocate relocation space.  */
2762
      srelgot->size += sizeof (Elf32_External_Rela);
2763
    }
2764
 
2765
  return TRUE;
2766
}
2767
 
2768
/* Try to fold PLT entries with GOT entries.  There are two cases when we
2769
   want to do this:
2770
 
2771
   - When all PLT references are GOTPLT references, and there are GOT
2772
     references, and this is not the executable.  We don't have to
2773
     generate a PLT at all.
2774
 
2775
   - When there are both (ordinary) PLT references and GOT references,
2776
     and this isn't the executable.
2777
     We want to make the PLT reference use the ordinary GOT entry rather
2778
     than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2779
     since the GOT entry will have to be resolved at startup anyway.
2780
 
2781
   Though the latter case is handled when room for the PLT is allocated,
2782
   not here.
2783
 
2784
   By folding into the GOT, we may need a round-trip to a PLT in the
2785
   executable for calls, a loss in performance.  Still, losing a
2786
   reloc is a win in size and at least in start-up time.
2787
 
2788
   Note that this function is called before symbols are forced local by
2789
   version scripts.  The differing cases are handled by
2790
   elf_cris_hide_symbol.  */
2791
 
2792
static bfd_boolean
2793
elf_cris_try_fold_plt_to_got (h, p)
2794
     struct elf_cris_link_hash_entry *h;
2795
     PTR p;
2796
{
2797
  struct bfd_link_info *info = (struct bfd_link_info *) p;
2798
 
2799
  /* If there are no GOT references for this symbol, we can't fold any
2800
     other reference so there's nothing to do.  Likewise if there are no
2801
     PLT references; GOTPLT references included.  */
2802
  if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2803
    return TRUE;
2804
 
2805
  /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2806
  BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2807
 
2808
  if (h->gotplt_refcount == h->root.plt.refcount)
2809
    {
2810
      /* The only PLT references are GOTPLT references, and there are GOT
2811
         references.  Convert PLT to GOT references.  */
2812
      if (! elf_cris_adjust_gotplt_to_got (h, info))
2813
        return FALSE;
2814
 
2815
      /* Clear the PLT references, so no PLT will be created.  */
2816
      h->root.plt.offset = (bfd_vma) -1;
2817
    }
2818
 
2819
  return TRUE;
2820
}
2821
 
2822
/* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2823
   to use a GOT entry (and create one) rather than requiring a GOTPLT
2824
   entry.  */
2825
 
2826
static void
2827
elf_cris_hide_symbol (info, h, force_local)
2828
     struct bfd_link_info *info;
2829
     struct elf_link_hash_entry *h;
2830
     bfd_boolean force_local;
2831
{
2832
  elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2833
 
2834
  _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2835
}
2836
 
2837
/* Adjust a symbol defined by a dynamic object and referenced by a
2838
   regular object.  The current definition is in some section of the
2839
   dynamic object, but we're not including those sections.  We have to
2840
   change the definition to something the rest of the link can
2841
   understand.  */
2842
 
2843
static bfd_boolean
2844
elf_cris_adjust_dynamic_symbol (info, h)
2845
     struct bfd_link_info *info;
2846
     struct elf_link_hash_entry *h;
2847
{
2848
  bfd *dynobj;
2849
  asection *s;
2850
  bfd_size_type plt_entry_size;
2851
 
2852
  dynobj = elf_hash_table (info)->dynobj;
2853
 
2854
  /* Make sure we know what is going on here.  */
2855
  BFD_ASSERT (dynobj != NULL
2856
              && (h->needs_plt
2857
                  || h->u.weakdef != NULL
2858
                  || (h->def_dynamic
2859
                      && h->ref_regular
2860
                      && !h->def_regular)));
2861
 
2862
  plt_entry_size
2863
    = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2864
       ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2865
 
2866
  /* If this is a function, put it in the procedure linkage table.  We
2867
     will fill in the contents of the procedure linkage table later,
2868
     when we know the address of the .got section.  */
2869
  if (h->type == STT_FUNC
2870
      || h->needs_plt)
2871
    {
2872
      /* If we link a program (not a DSO), we'll get rid of unnecessary
2873
         PLT entries; we point to the actual symbols -- even for pic
2874
         relocs, because a program built with -fpic should have the same
2875
         result as one built without -fpic, specifically considering weak
2876
         symbols.
2877
         FIXME: m68k and i386 differ here, for unclear reasons.  */
2878
      if (! info->shared
2879
          && !h->def_dynamic)
2880
        {
2881
          /* This case can occur if we saw a PLT reloc in an input file,
2882
             but the symbol was not defined by a dynamic object.  In such
2883
             a case, we don't actually need to build a procedure linkage
2884
             table, and we can just do an absolute or PC reloc instead, or
2885
             change a .got.plt index to a .got index for GOTPLT relocs.  */
2886
          BFD_ASSERT (h->needs_plt);
2887
          h->needs_plt = 0;
2888
          h->plt.offset = (bfd_vma) -1;
2889
          return
2890
            elf_cris_adjust_gotplt_to_got ((struct
2891
                                            elf_cris_link_hash_entry *) h,
2892
                                           info);
2893
        }
2894
 
2895
      /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2896
         where a pointer-equivalent symbol was unimportant (i.e. more
2897
         like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2898
         of the PLT.  We can't for the executable, because the GOT
2899
         entries will point to the PLT there (and be constant).  */
2900
      if (info->shared
2901
          && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2902
                                            h, info))
2903
        return FALSE;
2904
 
2905
      /* GC or folding may have rendered this entry unused.  */
2906
      if (h->plt.refcount <= 0)
2907
        {
2908
          h->needs_plt = 0;
2909
          h->plt.offset = (bfd_vma) -1;
2910
          return TRUE;
2911
        }
2912
 
2913
      /* Make sure this symbol is output as a dynamic symbol.  */
2914
      if (h->dynindx == -1)
2915
        {
2916
          if (! bfd_elf_link_record_dynamic_symbol (info, h))
2917
            return FALSE;
2918
        }
2919
 
2920
      s = bfd_get_section_by_name (dynobj, ".plt");
2921
      BFD_ASSERT (s != NULL);
2922
 
2923
      /* If this is the first .plt entry, make room for the special
2924
         first entry.  */
2925
      if (s->size == 0)
2926
        s->size += plt_entry_size;
2927
 
2928
      /* If this symbol is not defined in a regular file, and we are
2929
         not generating a shared library, then set the symbol to this
2930
         location in the .plt.  */
2931
      if (!info->shared
2932
          && !h->def_regular)
2933
        {
2934
          h->root.u.def.section = s;
2935
          h->root.u.def.value = s->size;
2936
        }
2937
 
2938
      /* If there's already a GOT entry, use that, not a .got.plt.  A
2939
         GOT field still has a reference count when we get here; it's
2940
         not yet changed to an offset.  We can't do this for an
2941
         executable, because then the reloc associated with the PLT
2942
         would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2943
         this to elf_cris_try_fold_plt_to_got.  */
2944
      if (info->shared && h->got.refcount > 0)
2945
        {
2946
          h->got.refcount += h->plt.refcount;
2947
 
2948
          /* Mark the PLT offset to use the GOT entry by setting the low
2949
             bit in the plt offset; it is always a multiple of
2950
             plt_entry_size (which is at least a multiple of 2).  */
2951
          BFD_ASSERT ((s->size % plt_entry_size) == 0);
2952
 
2953
          /* Change the PLT refcount to an offset.  */
2954
          h->plt.offset = s->size;
2955
 
2956
          /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2957
             that the got entry should be used instead.  */
2958
          BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2959
                       h)->gotplt_offset == 0);
2960
 
2961
          /* Make room for this entry.  */
2962
          s->size += plt_entry_size;
2963
 
2964
          return TRUE;
2965
        }
2966
 
2967
      /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2968
      h->plt.offset = s->size;
2969
 
2970
      /* Make room for this entry.  */
2971
      s->size += plt_entry_size;
2972
 
2973
      /* We also need to make an entry in the .got.plt section, which
2974
         will be placed in the .got section by the linker script.  */
2975
      ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2976
        = elf_cris_hash_table (info)->next_gotplt_entry;
2977
      elf_cris_hash_table (info)->next_gotplt_entry += 4;
2978
 
2979
      s = bfd_get_section_by_name (dynobj, ".got.plt");
2980
      BFD_ASSERT (s != NULL);
2981
      s->size += 4;
2982
 
2983
      /* We also need to make an entry in the .rela.plt section.  */
2984
 
2985
      s = bfd_get_section_by_name (dynobj, ".rela.plt");
2986
      BFD_ASSERT (s != NULL);
2987
      s->size += sizeof (Elf32_External_Rela);
2988
 
2989
      return TRUE;
2990
    }
2991
 
2992
  /* Reinitialize the plt offset now that it is not used as a reference
2993
     count any more.  */
2994
  h->plt.offset = (bfd_vma) -1;
2995
 
2996
  /* If this is a weak symbol, and there is a real definition, the
2997
     processor independent code will have arranged for us to see the
2998
     real definition first, and we can just use the same value.  */
2999
  if (h->u.weakdef != NULL)
3000
    {
3001
      BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3002
                  || h->u.weakdef->root.type == bfd_link_hash_defweak);
3003
      h->root.u.def.section = h->u.weakdef->root.u.def.section;
3004
      h->root.u.def.value = h->u.weakdef->root.u.def.value;
3005
      return TRUE;
3006
    }
3007
 
3008
  /* This is a reference to a symbol defined by a dynamic object which
3009
     is not a function.  */
3010
 
3011
  /* If we are creating a shared library, we must presume that the
3012
     only references to the symbol are via the global offset table.
3013
     For such cases we need not do anything here; the relocations will
3014
     be handled correctly by relocate_section.  */
3015
  if (info->shared)
3016
    return TRUE;
3017
 
3018
  /* If there are no references to this symbol that do not use the
3019
     GOT, we don't need to generate a copy reloc.  */
3020
  if (!h->non_got_ref)
3021
    return TRUE;
3022
 
3023
  if (h->size == 0)
3024
    {
3025
      (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
3026
                             h->root.root.string);
3027
      return TRUE;
3028
    }
3029
 
3030
  /* We must allocate the symbol in our .dynbss section, which will
3031
     become part of the .bss section of the executable.  There will be
3032
     an entry for this symbol in the .dynsym section.  The dynamic
3033
     object will contain position independent code, so all references
3034
     from the dynamic object to this symbol will go through the global
3035
     offset table.  The dynamic linker will use the .dynsym entry to
3036
     determine the address it must put in the global offset table, so
3037
     both the dynamic object and the regular object will refer to the
3038
     same memory location for the variable.  */
3039
 
3040
  s = bfd_get_section_by_name (dynobj, ".dynbss");
3041
  BFD_ASSERT (s != NULL);
3042
 
3043
  /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3044
     copy the initial value out of the dynamic object and into the
3045
     runtime process image.  We need to remember the offset into the
3046
     .rela.bss section we are going to use.  */
3047
  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3048
    {
3049
      asection *srel;
3050
 
3051
      srel = bfd_get_section_by_name (dynobj, ".rela.bss");
3052
      BFD_ASSERT (srel != NULL);
3053
      srel->size += sizeof (Elf32_External_Rela);
3054
      h->needs_copy = 1;
3055
    }
3056
 
3057
  return _bfd_elf_adjust_dynamic_copy (h, s);
3058
}
3059
 
3060
/* Adjust our "subclass" elements for an indirect symbol.  */
3061
 
3062
static void
3063
elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3064
                               struct elf_link_hash_entry *dir,
3065
                               struct elf_link_hash_entry *ind)
3066
{
3067
  struct elf_cris_link_hash_entry *edir, *eind;
3068
 
3069
  edir = (struct elf_cris_link_hash_entry *) dir;
3070
  eind = (struct elf_cris_link_hash_entry *) ind;
3071
 
3072
  /* Only indirect symbols are replaced; we're not interested in
3073
     updating any of EIND's fields for other symbols.  */
3074
  if (eind->root.root.type != bfd_link_hash_indirect)
3075
    {
3076
      /* Still, we need to copy flags for e.g. weak definitions.  */
3077
      _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3078
      return;
3079
    }
3080
 
3081
  BFD_ASSERT (edir->pcrel_relocs_copied == NULL);
3082
  BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3083
 
3084
#define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3085
#define XMOVE(F) XMOVOPZ (F, +=, 0)
3086
  XMOVOPZ (pcrel_relocs_copied, =, NULL);
3087
  XMOVE (gotplt_refcount);
3088
  XMOVE (gotplt_offset);
3089
  XMOVE (reg_got_refcount);
3090
  XMOVE (tprel_refcount);
3091
  XMOVE (dtp_refcount);
3092
#undef XMOVE
3093
#undef XMOVOPZ
3094
 
3095
  _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3096
}
3097
 
3098
/* Look through the relocs for a section during the first phase.  */
3099
 
3100
static bfd_boolean
3101
cris_elf_check_relocs (abfd, info, sec, relocs)
3102
     bfd *abfd;
3103
     struct bfd_link_info *info;
3104
     asection *sec;
3105
     const Elf_Internal_Rela *relocs;
3106
{
3107
  bfd *dynobj;
3108
  Elf_Internal_Shdr *symtab_hdr;
3109
  struct elf_link_hash_entry **sym_hashes;
3110
  bfd_signed_vma *local_got_refcounts;
3111
  const Elf_Internal_Rela *rel;
3112
  const Elf_Internal_Rela *rel_end;
3113
  asection *sgot;
3114
  asection *srelgot;
3115
  asection *sreloc;
3116
 
3117
  if (info->relocatable)
3118
    return TRUE;
3119
 
3120
  dynobj = elf_hash_table (info)->dynobj;
3121
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3122
  sym_hashes = elf_sym_hashes (abfd);
3123
  local_got_refcounts = elf_local_got_refcounts (abfd);
3124
 
3125
  sgot = NULL;
3126
  srelgot = NULL;
3127
  sreloc = NULL;
3128
 
3129
  rel_end = relocs + sec->reloc_count;
3130
  for (rel = relocs; rel < rel_end; rel++)
3131
    {
3132
      struct elf_link_hash_entry *h;
3133
      unsigned long r_symndx;
3134
      enum elf_cris_reloc_type r_type;
3135
      bfd_signed_vma got_element_size = 4;
3136
      unsigned long r_symndx_lgot = INT_MAX;
3137
 
3138
      r_symndx = ELF32_R_SYM (rel->r_info);
3139
      if (r_symndx < symtab_hdr->sh_info)
3140
        {
3141
          h = NULL;
3142
          r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3143
        }
3144
      else
3145
        {
3146
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3147
          while (h->root.type == bfd_link_hash_indirect
3148
                 || h->root.type == bfd_link_hash_warning)
3149
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
3150
        }
3151
 
3152
      r_type = ELF32_R_TYPE (rel->r_info);
3153
 
3154
      /* Some relocs require linker-created sections; we need to hang them
3155
         on the first input bfd we found that contained dynamic relocs.  */
3156
      switch (r_type)
3157
        {
3158
        case R_CRIS_32_DTPREL:
3159
          if ((sec->flags & SEC_ALLOC) == 0)
3160
            /* This'd be a .dtpreld entry in e.g. debug info.  We have
3161
               several different switch statements below, but none of
3162
               that is needed; we need no preparations for resolving
3163
               R_CRIS_32_DTPREL into a non-allocated section (debug
3164
               info), so let's just move on to the next
3165
               relocation.  */
3166
            continue;
3167
          /* Fall through.  */
3168
        case R_CRIS_16_DTPREL:
3169
          /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3170
             entry at index 3. */
3171
          if (elf_cris_hash_table (info)->dtpmod_refcount == 0)
3172
            elf_cris_hash_table (info)->next_gotplt_entry += 8;
3173
          elf_cris_hash_table (info)->dtpmod_refcount++;
3174
          /* Fall through.  */
3175
 
3176
        case R_CRIS_32_IE:
3177
        case R_CRIS_32_GD:
3178
        case R_CRIS_16_GOT_GD:
3179
        case R_CRIS_32_GOT_GD:
3180
        case R_CRIS_32_GOT_TPREL:
3181
        case R_CRIS_16_GOT_TPREL:
3182
        case R_CRIS_16_GOT:
3183
        case R_CRIS_32_GOT:
3184
        case R_CRIS_32_GOTREL:
3185
        case R_CRIS_32_PLT_GOTREL:
3186
        case R_CRIS_32_PLT_PCREL:
3187
        case R_CRIS_16_GOTPLT:
3188
        case R_CRIS_32_GOTPLT:
3189
          if (dynobj == NULL)
3190
            {
3191
              elf_hash_table (info)->dynobj = dynobj = abfd;
3192
 
3193
              /* We could handle this if we can get a handle on the
3194
                 output bfd in elf_cris_adjust_dynamic_symbol.  Failing
3195
                 that, we must insist on dynobj being a specific mach.  */
3196
              if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3197
                {
3198
                  (*_bfd_error_handler)
3199
                    (_("%B, section %A:\n  v10/v32 compatible object %s"
3200
                       " must not contain a PIC relocation"),
3201
                     abfd, sec);
3202
                  return FALSE;
3203
                }
3204
 
3205
              /* Create the .got section, so we can assume it's always
3206
                 present whenever there's a dynobj.  */
3207
              if (!_bfd_elf_create_got_section (dynobj, info))
3208
                return FALSE;
3209
            }
3210
 
3211
          if (sgot == NULL)
3212
            sgot = bfd_get_section_by_name (dynobj, ".got");
3213
 
3214
          if (local_got_refcounts == NULL)
3215
            {
3216
              bfd_size_type amt;
3217
 
3218
              /* We use index local_got_refcounts[-1] to count all
3219
                 GOT-relative relocations that do not have explicit
3220
                 GOT entries.  */
3221
              amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3222
              amt *= sizeof (bfd_signed_vma);
3223
              local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3224
              if (local_got_refcounts == NULL)
3225
                return FALSE;
3226
 
3227
              local_got_refcounts++;
3228
              elf_local_got_refcounts (abfd) = local_got_refcounts;
3229
            }
3230
          break;
3231
 
3232
        default:
3233
          break;
3234
        }
3235
 
3236
      /* Some relocs require a global offset table (but perhaps not a
3237
         specific GOT entry).  */
3238
      switch (r_type)
3239
        {
3240
        case R_CRIS_16_DTPREL:
3241
        case R_CRIS_32_DTPREL:
3242
          /* Not requesting .got.rela for an executable: the contents
3243
             of the first entry is constant there.  For a shared
3244
             library, we need .got.rela for the R_CRIS_DTPMOD
3245
             relocation at index 3.  */
3246
          if (!info->shared)
3247
            break;
3248
          /* Fall through.  */
3249
 
3250
        case R_CRIS_32_IE:
3251
        case R_CRIS_32_GD:
3252
        case R_CRIS_16_GOT_GD:
3253
        case R_CRIS_32_GOT_GD:
3254
        case R_CRIS_32_GOT_TPREL:
3255
        case R_CRIS_16_GOT_TPREL:
3256
          /* Fall through.  */
3257
 
3258
          /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3259
             entry only for local symbols.  Unfortunately, we don't know
3260
             until later on if there's a version script that forces the
3261
             symbol local.  We must have the .rela.got section in place
3262
             before we know if the symbol looks global now, so we need
3263
             to treat the reloc just like for R_CRIS_16_GOT and
3264
             R_CRIS_32_GOT.  */
3265
        case R_CRIS_16_GOTPLT:
3266
        case R_CRIS_32_GOTPLT:
3267
        case R_CRIS_16_GOT:
3268
        case R_CRIS_32_GOT:
3269
          if (srelgot == NULL
3270
              && (h != NULL || info->shared))
3271
            {
3272
              srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3273
              if (srelgot == NULL)
3274
                {
3275
                  srelgot = bfd_make_section_with_flags (dynobj,
3276
                                                         ".rela.got",
3277
                                                         (SEC_ALLOC
3278
                                                          | SEC_LOAD
3279
                                                          | SEC_HAS_CONTENTS
3280
                                                          | SEC_IN_MEMORY
3281
                                                          | SEC_LINKER_CREATED
3282
                                                          | SEC_READONLY));
3283
                  if (srelgot == NULL
3284
                      || !bfd_set_section_alignment (dynobj, srelgot, 2))
3285
                    return FALSE;
3286
                }
3287
            }
3288
          break;
3289
 
3290
        default:
3291
          break;
3292
        }
3293
 
3294
      /* Warn and error for invalid input.  */
3295
      switch (r_type)
3296
        {
3297
        case R_CRIS_32_IE:
3298
        case R_CRIS_32_TPREL:
3299
        case R_CRIS_16_TPREL:
3300
        case R_CRIS_32_GD:
3301
          if (info->shared)
3302
            {
3303
              (*_bfd_error_handler)
3304
                (_("%B, section %A:\n  relocation %s not valid"
3305
                   " in a shared object;"
3306
                   " typically an option mixup, recompile with -fPIC"),
3307
                 abfd,
3308
                 sec,
3309
                 cris_elf_howto_table[r_type].name);
3310
              /* Don't return FALSE here; we want messages for all of
3311
                 these and the error behavior is ungraceful
3312
                 anyway.  */
3313
            }
3314
        default:
3315
          break;
3316
        }
3317
 
3318
      switch (r_type)
3319
        {
3320
        case R_CRIS_32_GD:
3321
        case R_CRIS_16_GOT_GD:
3322
        case R_CRIS_32_GOT_GD:
3323
          /* These are requests for tls_index entries, run-time R_CRIS_DTP.  */
3324
          got_element_size = 8;
3325
          r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3326
          break;
3327
 
3328
        case R_CRIS_16_DTPREL:
3329
        case R_CRIS_32_DTPREL:
3330
          /* These two just request for the constant-index
3331
             module-local tls_index-sized GOT entry, which we add
3332
             elsewhere.  */
3333
          break;
3334
 
3335
        case R_CRIS_32_IE:
3336
        case R_CRIS_32_GOT_TPREL:
3337
        case R_CRIS_16_GOT_TPREL:
3338
          r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3339
 
3340
          /* Those relocs also require that a DSO is of type
3341
             Initial Exec.  Like other targets, we don't reset this
3342
             flag even if the relocs are GC:ed away.  */
3343
          if (info->shared)
3344
            info->flags |= DF_STATIC_TLS;
3345
          break;
3346
 
3347
          /* Let's list the other assembler-generated TLS-relocs too,
3348
             just to show that they're not forgotten. */
3349
        case R_CRIS_16_TPREL:
3350
        case R_CRIS_32_TPREL:
3351
        default:
3352
          break;
3353
        }
3354
 
3355
      switch (r_type)
3356
        {
3357
        case R_CRIS_16_GOTPLT:
3358
        case R_CRIS_32_GOTPLT:
3359
          /* Mark that we need a GOT entry if the PLT entry (and its GOT
3360
             entry) is eliminated.  We can only do this for a non-local
3361
             symbol.  */
3362
          if (h != NULL)
3363
            {
3364
              elf_cris_hash_entry (h)->gotplt_refcount++;
3365
              goto handle_gotplt_reloc;
3366
            }
3367
          /* If h is NULL then this is a local symbol, and we must make a
3368
             GOT entry for it, so handle it like a GOT reloc.  */
3369
          /* Fall through.  */
3370
 
3371
        case R_CRIS_32_IE:
3372
        case R_CRIS_32_GD:
3373
        case R_CRIS_16_GOT_GD:
3374
        case R_CRIS_32_GOT_GD:
3375
        case R_CRIS_32_GOT_TPREL:
3376
        case R_CRIS_16_GOT_TPREL:
3377
        case R_CRIS_16_GOT:
3378
        case R_CRIS_32_GOT:
3379
          /* This symbol requires a global offset table entry.  */
3380
          if (h != NULL)
3381
            {
3382
              if (h->got.refcount == 0)
3383
                {
3384
                  /* Make sure this symbol is output as a dynamic symbol.  */
3385
                  if (h->dynindx == -1)
3386
                    {
3387
                      if (!bfd_elf_link_record_dynamic_symbol (info, h))
3388
                        return FALSE;
3389
                    }
3390
                }
3391
 
3392
              /* Update the sum of reloc counts for this symbol.  */
3393
              h->got.refcount++;
3394
 
3395
              switch (r_type)
3396
                {
3397
                case R_CRIS_16_GOT:
3398
                case R_CRIS_32_GOT:
3399
                  if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3400
                    {
3401
                      /* Allocate space in the .got section.  */
3402
                      sgot->size += got_element_size;
3403
                      /* Allocate relocation space.  */
3404
                      srelgot->size += sizeof (Elf32_External_Rela);
3405
                    }
3406
                  elf_cris_hash_entry (h)->reg_got_refcount++;
3407
                  break;
3408
 
3409
                case R_CRIS_32_GD:
3410
                case R_CRIS_16_GOT_GD:
3411
                case R_CRIS_32_GOT_GD:
3412
                  if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3413
                    {
3414
                      /* Allocate space in the .got section.  */
3415
                      sgot->size += got_element_size;
3416
                      /* Allocate relocation space.  */
3417
                      srelgot->size += sizeof (Elf32_External_Rela);
3418
                    }
3419
                  elf_cris_hash_entry (h)->dtp_refcount++;
3420
                  break;
3421
 
3422
                case R_CRIS_32_IE:
3423
                case R_CRIS_32_GOT_TPREL:
3424
                case R_CRIS_16_GOT_TPREL:
3425
                  if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3426
                    {
3427
                      /* Allocate space in the .got section.  */
3428
                      sgot->size += got_element_size;
3429
                      /* Allocate relocation space.  */
3430
                      srelgot->size += sizeof (Elf32_External_Rela);
3431
                    }
3432
                  elf_cris_hash_entry (h)->tprel_refcount++;
3433
                  break;
3434
 
3435
                default:
3436
                  BFD_FAIL ();
3437
                  break;
3438
                }
3439
            }
3440
          else
3441
            {
3442
              /* This is a global offset table entry for a local symbol.  */
3443
              if (local_got_refcounts[r_symndx_lgot] == 0)
3444
                {
3445
                  sgot->size += got_element_size;
3446
                  if (info->shared)
3447
                    {
3448
                      /* If we are generating a shared object, we need
3449
                         to output a R_CRIS_RELATIVE reloc so that the
3450
                         dynamic linker can adjust this GOT entry.
3451
                         Similarly for non-regular got entries.  */
3452
                      srelgot->size += sizeof (Elf32_External_Rela);
3453
                    }
3454
                }
3455
              /* Update the reloc-specific count.  */
3456
              local_got_refcounts[r_symndx_lgot]++;
3457
 
3458
              /* This one is the sum of all the others.  */
3459
              local_got_refcounts[r_symndx]++;
3460
            }
3461
          break;
3462
 
3463
        case R_CRIS_16_DTPREL:
3464
        case R_CRIS_32_DTPREL:
3465
        case R_CRIS_32_GOTREL:
3466
          /* This reference requires a global offset table.
3467
             FIXME: The actual refcount isn't used currently; the .got
3468
             section can't be removed if there were any references in the
3469
             input.  */
3470
          local_got_refcounts[-1]++;
3471
          break;
3472
 
3473
        handle_gotplt_reloc:
3474
 
3475
        case R_CRIS_32_PLT_GOTREL:
3476
          /* This reference requires a global offset table.  */
3477
          local_got_refcounts[-1]++;
3478
          /* Fall through.  */
3479
 
3480
        case R_CRIS_32_PLT_PCREL:
3481
          /* This symbol requires a procedure linkage table entry.  We
3482
             actually build the entry in adjust_dynamic_symbol,
3483
             because this might be a case of linking PIC code which is
3484
             never referenced by a dynamic object, in which case we
3485
             don't need to generate a procedure linkage table entry
3486
             after all.  */
3487
 
3488
          /* Beware: if we'd check for visibility of the symbol here
3489
             (and not marking the need for a PLT when non-visible), we'd
3490
             get into trouble with keeping handling consistent with
3491
             regards to relocs found before definition and GOTPLT
3492
             handling.  Eliminable PLT entries will be dealt with later
3493
             anyway.  */
3494
          if (h == NULL)
3495
            continue;
3496
 
3497
          h->needs_plt = 1;
3498
          h->plt.refcount++;
3499
          break;
3500
 
3501
        case R_CRIS_8:
3502
        case R_CRIS_16:
3503
        case R_CRIS_32:
3504
          /* Let's help debug shared library creation.  Any of these
3505
             relocs *can* be used in shared libs, but pages containing
3506
             them cannot be shared, so they're not appropriate for
3507
             common use.  Don't warn for sections we don't care about,
3508
             such as debug sections or non-constant sections.  We
3509
             can't help tables of (global) function pointers, for
3510
             example, though they must be emitted in a (writable) data
3511
             section to avoid having impure text sections.  */
3512
          if (info->shared
3513
              && (sec->flags & SEC_ALLOC) != 0
3514
              && (sec->flags & SEC_READONLY) != 0)
3515
            {
3516
              /* FIXME: How do we make this optionally a warning only?  */
3517
              (*_bfd_error_handler)
3518
                (_("%B, section %A:\n  relocation %s should not"
3519
                   " be used in a shared object; recompile with -fPIC"),
3520
                 abfd,
3521
                 sec,
3522
                 cris_elf_howto_table[r_type].name);
3523
            }
3524
          if (h != NULL)
3525
            {
3526
              h->non_got_ref = 1;
3527
 
3528
              /* Make sure a plt entry is created for this symbol if it
3529
                 turns out to be a function defined by a dynamic object.  */
3530
              if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3531
                h->plt.refcount++;
3532
            }
3533
 
3534
          /* If we are creating a shared library and this is not a local
3535
             symbol, we need to copy the reloc into the shared library.
3536
             However when linking with -Bsymbolic and this is a global
3537
             symbol which is defined in an object we are including in the
3538
             link (i.e., DEF_REGULAR is set), then we can resolve the
3539
             reloc directly.  At this point we have not seen all the input
3540
             files, so it is possible that DEF_REGULAR is not set now but
3541
             will be set later (it is never cleared).  In case of a weak
3542
             definition, DEF_REGULAR may be cleared later by a strong
3543
             definition in a shared library.  We account for that
3544
             possibility below by storing information in the relocs_copied
3545
             field of the hash table entry.  A similar situation occurs
3546
             when creating shared libraries and symbol visibility changes
3547
             render the symbol local.  */
3548
 
3549
          /* No need to do anything if we're not creating a shared object.  */
3550
          if (! info->shared)
3551
            break;
3552
 
3553
          /* We don't need to handle relocs into sections not going into
3554
             the "real" output.  */
3555
          if ((sec->flags & SEC_ALLOC) == 0)
3556
            break;
3557
 
3558
          /* We may need to create a reloc section in the dynobj and made room
3559
             for this reloc.  */
3560
          if (sreloc == NULL)
3561
            {
3562
              sreloc = _bfd_elf_make_dynamic_reloc_section
3563
                (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3564
 
3565
              if (sreloc == NULL)
3566
                return FALSE;
3567
            }
3568
 
3569
          if (sec->flags & SEC_READONLY)
3570
            info->flags |= DF_TEXTREL;
3571
 
3572
          sreloc->size += sizeof (Elf32_External_Rela);
3573
          break;
3574
 
3575
        case R_CRIS_8_PCREL:
3576
        case R_CRIS_16_PCREL:
3577
        case R_CRIS_32_PCREL:
3578
          if (h != NULL)
3579
            {
3580
              h->non_got_ref = 1;
3581
 
3582
              /* Make sure a plt entry is created for this symbol if it
3583
                 turns out to be a function defined by a dynamic object.  */
3584
              if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3585
                h->plt.refcount++;
3586
            }
3587
 
3588
          /* If we are creating a shared library and this is not a local
3589
             symbol, we need to copy the reloc into the shared library.
3590
             However when linking with -Bsymbolic and this is a global
3591
             symbol which is defined in an object we are including in the
3592
             link (i.e., DEF_REGULAR is set), then we can resolve the
3593
             reloc directly.  At this point we have not seen all the input
3594
             files, so it is possible that DEF_REGULAR is not set now but
3595
             will be set later (it is never cleared).  In case of a weak
3596
             definition, DEF_REGULAR may be cleared later by a strong
3597
             definition in a shared library.  We account for that
3598
             possibility below by storing information in the relocs_copied
3599
             field of the hash table entry.  A similar situation occurs
3600
             when creating shared libraries and symbol visibility changes
3601
             render the symbol local.  */
3602
 
3603
          /* No need to do anything if we're not creating a shared object.  */
3604
          if (! info->shared)
3605
            break;
3606
 
3607
          /* We don't need to handle relocs into sections not going into
3608
             the "real" output.  */
3609
          if ((sec->flags & SEC_ALLOC) == 0)
3610
            break;
3611
 
3612
          /* If the symbol is local, then we know already we can
3613
             eliminate the reloc.  */
3614
          if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3615
            break;
3616
 
3617
          /* If this is with -Bsymbolic and the symbol isn't weak, and
3618
             is defined by an ordinary object (the ones we include in
3619
             this shared library) then we can also eliminate the
3620
             reloc.  See comment above for more eliminable cases which
3621
             we can't identify at this time.  */
3622
          if (info->symbolic
3623
              && h->root.type != bfd_link_hash_defweak
3624
              && h->def_regular)
3625
            break;
3626
 
3627
          /* We may need to create a reloc section in the dynobj and made room
3628
             for this reloc.  */
3629
          if (sreloc == NULL)
3630
            {
3631
              sreloc = _bfd_elf_make_dynamic_reloc_section
3632
                (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3633
 
3634
              if (sreloc == NULL)
3635
                return FALSE;
3636
            }
3637
 
3638
          sreloc->size += sizeof (Elf32_External_Rela);
3639
 
3640
          /* We count the number of PC relative relocations we have
3641
             entered for this symbol, so that we can discard them
3642
             again if the symbol is later defined by a regular object.
3643
             We know that h is really a pointer to an
3644
             elf_cris_link_hash_entry.  */
3645
          {
3646
            struct elf_cris_link_hash_entry *eh;
3647
            struct elf_cris_pcrel_relocs_copied *p;
3648
 
3649
            eh = elf_cris_hash_entry (h);
3650
 
3651
            for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3652
              if (p->section == sreloc)
3653
                break;
3654
 
3655
            if (p == NULL)
3656
              {
3657
                p = ((struct elf_cris_pcrel_relocs_copied *)
3658
                     bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3659
                if (p == NULL)
3660
                  return FALSE;
3661
                p->next = eh->pcrel_relocs_copied;
3662
                eh->pcrel_relocs_copied = p;
3663
                p->section = sreloc;
3664
                p->count = 0;
3665
                p->r_type = r_type;
3666
              }
3667
 
3668
            ++p->count;
3669
          }
3670
          break;
3671
 
3672
        /* This relocation describes the C++ object vtable hierarchy.
3673
           Reconstruct it for later use during GC.  */
3674
        case R_CRIS_GNU_VTINHERIT:
3675
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3676
            return FALSE;
3677
          break;
3678
 
3679
        /* This relocation describes which C++ vtable entries are actually
3680
           used.  Record for later use during GC.  */
3681
        case R_CRIS_GNU_VTENTRY:
3682
          BFD_ASSERT (h != NULL);
3683
          if (h != NULL
3684
              && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3685
            return FALSE;
3686
          break;
3687
 
3688
        case R_CRIS_16_TPREL:
3689
        case R_CRIS_32_TPREL:
3690
          /* Already warned above, when necessary.  */
3691
          break;
3692
 
3693
        default:
3694
          /* Other relocs do not appear here.  */
3695
          bfd_set_error (bfd_error_bad_value);
3696
          return FALSE;
3697
        }
3698
    }
3699
 
3700
  return TRUE;
3701
}
3702
 
3703
/* Set the sizes of the dynamic sections.  */
3704
 
3705
static bfd_boolean
3706
elf_cris_size_dynamic_sections (output_bfd, info)
3707
     bfd *output_bfd ATTRIBUTE_UNUSED;
3708
     struct bfd_link_info *info;
3709
{
3710
  bfd *dynobj;
3711
  asection *s;
3712
  bfd_boolean plt;
3713
  bfd_boolean relocs;
3714
 
3715
  dynobj = elf_hash_table (info)->dynobj;
3716
  BFD_ASSERT (dynobj != NULL);
3717
 
3718
  if (elf_hash_table (info)->dynamic_sections_created)
3719
    {
3720
      /* Set the contents of the .interp section to the interpreter.  */
3721
      if (info->executable)
3722
        {
3723
          s = bfd_get_section_by_name (dynobj, ".interp");
3724
          BFD_ASSERT (s != NULL);
3725
          s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3726
          s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3727
        }
3728
    }
3729
  else
3730
    {
3731
      /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
3732
      elf_cris_link_hash_traverse (elf_cris_hash_table (info),
3733
                                   elf_cris_adjust_gotplt_to_got,
3734
                                   (PTR) info);
3735
 
3736
      /* We may have created entries in the .rela.got section.
3737
         However, if we are not creating the dynamic sections, we will
3738
         not actually use these entries.  Reset the size of .rela.got,
3739
         which will cause it to get stripped from the output file
3740
         below.  */
3741
      s = bfd_get_section_by_name (dynobj, ".rela.got");
3742
      if (s != NULL)
3743
        s->size = 0;
3744
    }
3745
 
3746
  /* If this is a -Bsymbolic shared link, then we need to discard all PC
3747
     relative relocs against symbols defined in a regular object.  We
3748
     allocated space for them in the check_relocs routine, but we will not
3749
     fill them in in the relocate_section routine.  We also discard space
3750
     for relocs that have become for local symbols due to symbol
3751
     visibility changes.  For programs, we discard space for relocs for
3752
     symbols not referenced by any dynamic object.  */
3753
  if (info->shared)
3754
    elf_cris_link_hash_traverse (elf_cris_hash_table (info),
3755
                                 elf_cris_discard_excess_dso_dynamics,
3756
                                 (PTR) info);
3757
  else
3758
    elf_cris_link_hash_traverse (elf_cris_hash_table (info),
3759
                                 elf_cris_discard_excess_program_dynamics,
3760
                                 (PTR) info);
3761
 
3762
  /* The check_relocs and adjust_dynamic_symbol entry points have
3763
     determined the sizes of the various dynamic sections.  Allocate
3764
     memory for them.  */
3765
  plt = FALSE;
3766
  relocs = FALSE;
3767
  for (s = dynobj->sections; s != NULL; s = s->next)
3768
    {
3769
      const char *name;
3770
 
3771
      if ((s->flags & SEC_LINKER_CREATED) == 0)
3772
        continue;
3773
 
3774
      /* It's OK to base decisions on the section name, because none
3775
         of the dynobj section names depend upon the input files.  */
3776
      name = bfd_get_section_name (dynobj, s);
3777
 
3778
      if (strcmp (name, ".plt") == 0)
3779
        {
3780
          /* Remember whether there is a PLT.  */
3781
          plt = s->size != 0;
3782
        }
3783
      else if (strcmp (name, ".got.plt") == 0)
3784
        {
3785
          /* The .got.plt contains the .got header as well as the
3786
             actual .got.plt contents.  The .got header may contain a
3787
             R_CRIS_DTPMOD entry at index 3.  */
3788
          s->size += elf_cris_hash_table (info)->dtpmod_refcount != 0
3789
            ? 8 : 0;
3790
        }
3791
      else if (CONST_STRNEQ (name, ".rela"))
3792
        {
3793
          if (strcmp (name, ".rela.got") == 0
3794
              && elf_cris_hash_table (info)->dtpmod_refcount != 0
3795
              && info->shared)
3796
            s->size += sizeof (Elf32_External_Rela);
3797
 
3798
          if (s->size != 0)
3799
            {
3800
              /* Remember whether there are any reloc sections other
3801
                 than .rela.plt.  */
3802
              if (strcmp (name, ".rela.plt") != 0)
3803
                  relocs = TRUE;
3804
 
3805
              /* We use the reloc_count field as a counter if we need
3806
                 to copy relocs into the output file.  */
3807
              s->reloc_count = 0;
3808
            }
3809
        }
3810
      else if (! CONST_STRNEQ (name, ".got")
3811
               && strcmp (name, ".dynbss") != 0)
3812
        {
3813
          /* It's not one of our sections, so don't allocate space.  */
3814
          continue;
3815
        }
3816
 
3817
      if (s->size == 0)
3818
        {
3819
          /* If we don't need this section, strip it from the
3820
             output file.  This is mostly to handle .rela.bss and
3821
             .rela.plt.  We must create both sections in
3822
             create_dynamic_sections, because they must be created
3823
             before the linker maps input sections to output
3824
             sections.  The linker does that before
3825
             adjust_dynamic_symbol is called, and it is that
3826
             function which decides whether anything needs to go
3827
             into these sections.  */
3828
          s->flags |= SEC_EXCLUDE;
3829
          continue;
3830
        }
3831
 
3832
      if ((s->flags & SEC_HAS_CONTENTS) == 0)
3833
        continue;
3834
 
3835
      /* Allocate memory for the section contents. We use bfd_zalloc here
3836
         in case unused entries are not reclaimed before the section's
3837
         contents are written out.  This should not happen, but this way
3838
         if it does, we will not write out garbage.  For reloc sections,
3839
         this will make entries have the type R_CRIS_NONE.  */
3840
      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3841
      if (s->contents == NULL)
3842
        return FALSE;
3843
    }
3844
 
3845
  if (elf_hash_table (info)->dynamic_sections_created)
3846
    {
3847
      /* Add some entries to the .dynamic section.  We fill in the
3848
         values later, in elf_cris_finish_dynamic_sections, but we
3849
         must add the entries now so that we get the correct size for
3850
         the .dynamic section.  The DT_DEBUG entry is filled in by the
3851
         dynamic linker and used by the debugger.  */
3852
#define add_dynamic_entry(TAG, VAL) \
3853
  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3854
 
3855
      if (!info->shared)
3856
        {
3857
          if (!add_dynamic_entry (DT_DEBUG, 0))
3858
            return FALSE;
3859
        }
3860
 
3861
      if (plt)
3862
        {
3863
          if (!add_dynamic_entry (DT_PLTGOT, 0)
3864
              || !add_dynamic_entry (DT_PLTRELSZ, 0)
3865
              || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3866
              || !add_dynamic_entry (DT_JMPREL, 0))
3867
            return FALSE;
3868
        }
3869
 
3870
      if (relocs)
3871
        {
3872
          if (!add_dynamic_entry (DT_RELA, 0)
3873
              || !add_dynamic_entry (DT_RELASZ, 0)
3874
              || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3875
            return FALSE;
3876
        }
3877
 
3878
      if ((info->flags & DF_TEXTREL) != 0)
3879
        {
3880
          if (!add_dynamic_entry (DT_TEXTREL, 0))
3881
            return FALSE;
3882
          info->flags |= DF_TEXTREL;
3883
        }
3884
    }
3885
#undef add_dynamic_entry
3886
 
3887
  return TRUE;
3888
}
3889
 
3890
/* This function is called via elf_cris_link_hash_traverse if we are
3891
   creating a shared object.  In the -Bsymbolic case, it discards the
3892
   space allocated to copy PC relative relocs against symbols which
3893
   are defined in regular objects.  For the normal non-symbolic case,
3894
   we also discard space for relocs that have become local due to
3895
   symbol visibility changes.  We allocated space for them in the
3896
   check_relocs routine, but we won't fill them in in the
3897
   relocate_section routine.  */
3898
 
3899
static bfd_boolean
3900
elf_cris_discard_excess_dso_dynamics (h, inf)
3901
     struct elf_cris_link_hash_entry *h;
3902
     PTR inf;
3903
{
3904
  struct elf_cris_pcrel_relocs_copied *s;
3905
  struct bfd_link_info *info = (struct bfd_link_info *) inf;
3906
 
3907
  if (h->root.root.type == bfd_link_hash_warning)
3908
    h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3909
 
3910
  /* If a symbol has been forced local or we have found a regular
3911
     definition for the symbolic link case, then we won't be needing
3912
     any relocs.  */
3913
  if (h->root.def_regular
3914
      && (h->root.forced_local
3915
          || info->symbolic))
3916
    {
3917
      for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3918
        s->section->size -= s->count * sizeof (Elf32_External_Rela);
3919
 
3920
      return TRUE;
3921
    }
3922
 
3923
  /* If we have accounted for PC-relative relocs for read-only
3924
     sections, now is the time to warn for them.  We can't do it in
3925
     cris_elf_check_relocs, because we don't know the status of all
3926
     symbols at that time (and it's common to force symbols local
3927
     late).  */
3928
 
3929
  for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3930
    {
3931
      BFD_ASSERT ((s->section->flags & SEC_READONLY) != 0);
3932
 
3933
      /* FIXME: How do we make this optionally a warning only?  */
3934
      (*_bfd_error_handler)
3935
        (_("%B, section `%A', to symbol `%s':\n"
3936
           "  relocation %s should not be used"
3937
           " in a shared object; recompile with -fPIC"),
3938
         s->section->owner,
3939
         s->section,
3940
         h->root.root.root.string,
3941
         cris_elf_howto_table[s->r_type].name);
3942
 
3943
      info->flags |= DF_TEXTREL;
3944
    }
3945
 
3946
  return TRUE;
3947
}
3948
 
3949
/* This function is called via elf_cris_link_hash_traverse if we are *not*
3950
   creating a shared object.  We discard space for relocs for symbols put
3951
   in the .got, but which we found we do not have to resolve at run-time.  */
3952
 
3953
static bfd_boolean
3954
elf_cris_discard_excess_program_dynamics (h, inf)
3955
     struct elf_cris_link_hash_entry *h;
3956
     PTR inf;
3957
{
3958
  struct bfd_link_info *info = (struct bfd_link_info *) inf;
3959
 
3960
  if (h->root.root.type == bfd_link_hash_warning)
3961
    h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3962
 
3963
  /* If we're not creating a shared library and have a symbol which is
3964
     referred to by .got references, but the symbol is defined locally,
3965
     (or rather, not defined by a DSO) then lose the reloc for the .got
3966
     (don't allocate room for it).  Likewise for relocs for something
3967
     for which we create a PLT.  */
3968
  if (!h->root.def_dynamic
3969
      || h->root.plt.refcount > 0)
3970
    {
3971
      if (h->reg_got_refcount > 0
3972
          /* The size of this section is only valid and in sync with the
3973
             various reference counts if we do dynamic; don't decrement it
3974
             otherwise.  */
3975
          && elf_hash_table (info)->dynamic_sections_created)
3976
        {
3977
          bfd *dynobj = elf_hash_table (info)->dynobj;
3978
          asection *srelgot;
3979
 
3980
          BFD_ASSERT (dynobj != NULL);
3981
 
3982
          srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3983
 
3984
          BFD_ASSERT (srelgot != NULL);
3985
 
3986
          srelgot->size -= sizeof (Elf32_External_Rela);
3987
        }
3988
 
3989
      /* If the locally-defined symbol isn't used by a DSO, then we don't
3990
         have to export it as a dynamic symbol.  This was already done for
3991
         functions; doing this for all symbols would presumably not
3992
         introduce new problems.  Of course we don't do this if we're
3993
         exporting all dynamic symbols.  */
3994
      if (! info->export_dynamic
3995
          && h->root.dynindx != -1
3996
          && !h->root.def_dynamic
3997
          && !h->root.ref_dynamic)
3998
        {
3999
          h->root.dynindx = -1;
4000
          _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4001
                                  h->root.dynstr_index);
4002
        }
4003
    }
4004
 
4005
  return TRUE;
4006
}
4007
 
4008
/* Reject a file depending on presence and expectation of prefixed
4009
   underscores on symbols.  */
4010
 
4011
static bfd_boolean
4012
cris_elf_object_p (abfd)
4013
     bfd *abfd;
4014
{
4015
  if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4016
    return FALSE;
4017
 
4018
  if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4019
    return (bfd_get_symbol_leading_char (abfd) == '_');
4020
  else
4021
    return (bfd_get_symbol_leading_char (abfd) == 0);
4022
}
4023
 
4024
/* Mark presence or absence of leading underscore.  Set machine type
4025
   flags from mach type.  */
4026
 
4027
static void
4028
cris_elf_final_write_processing (abfd, linker)
4029
     bfd *abfd;
4030
     bfd_boolean linker ATTRIBUTE_UNUSED;
4031
{
4032
  unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4033
 
4034
  e_flags &= ~EF_CRIS_UNDERSCORE;
4035
  if (bfd_get_symbol_leading_char (abfd) == '_')
4036
    e_flags |= EF_CRIS_UNDERSCORE;
4037
 
4038
  switch (bfd_get_mach (abfd))
4039
    {
4040
    case bfd_mach_cris_v0_v10:
4041
      e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4042
      break;
4043
 
4044
    case bfd_mach_cris_v10_v32:
4045
      e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4046
      break;
4047
 
4048
    case bfd_mach_cris_v32:
4049
      e_flags |= EF_CRIS_VARIANT_V32;
4050
      break;
4051
 
4052
    default:
4053
      _bfd_abort (__FILE__, __LINE__,
4054
                  _("Unexpected machine number"));
4055
    }
4056
 
4057
  elf_elfheader (abfd)->e_flags = e_flags;
4058
}
4059
 
4060
/* Set the mach type from e_flags value.  */
4061
 
4062
static bfd_boolean
4063
cris_elf_set_mach_from_flags (abfd, flags)
4064
     bfd *abfd;
4065
     unsigned long flags;
4066
{
4067
  switch (flags & EF_CRIS_VARIANT_MASK)
4068
    {
4069
    case EF_CRIS_VARIANT_ANY_V0_V10:
4070
      bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4071
      break;
4072
 
4073
    case EF_CRIS_VARIANT_V32:
4074
      bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4075
      break;
4076
 
4077
    case EF_CRIS_VARIANT_COMMON_V10_V32:
4078
      bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4079
      break;
4080
 
4081
    default:
4082
      /* Since we don't recognize them, we obviously can't support them
4083
         with this code; we'd have to require that all future handling
4084
         would be optional.  */
4085
      bfd_set_error (bfd_error_wrong_format);
4086
      return FALSE;
4087
    }
4088
 
4089
  return TRUE;
4090
}
4091
 
4092
/* Display the flags field.  */
4093
 
4094
static bfd_boolean
4095
cris_elf_print_private_bfd_data (abfd, ptr)
4096
     bfd *abfd;
4097
     PTR ptr;
4098
{
4099
  FILE *file = (FILE *) ptr;
4100
 
4101
  BFD_ASSERT (abfd != NULL && ptr != NULL);
4102
 
4103
  _bfd_elf_print_private_bfd_data (abfd, ptr);
4104
 
4105
  fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4106
 
4107
  if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4108
    fprintf (file, _(" [symbols have a _ prefix]"));
4109
  if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4110
      == EF_CRIS_VARIANT_COMMON_V10_V32)
4111
    fprintf (file, _(" [v10 and v32]"));
4112
  if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4113
      == EF_CRIS_VARIANT_V32)
4114
    fprintf (file, _(" [v32]"));
4115
 
4116
  fputc ('\n', file);
4117
  return TRUE;
4118
}
4119
 
4120
/* Don't mix files with and without a leading underscore.  */
4121
 
4122
static bfd_boolean
4123
cris_elf_merge_private_bfd_data (ibfd, obfd)
4124
     bfd *ibfd;
4125
     bfd *obfd;
4126
{
4127
  int imach, omach;
4128
 
4129
  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4130
    return FALSE;
4131
 
4132
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4133
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4134
    return TRUE;
4135
 
4136
  imach = bfd_get_mach (ibfd);
4137
 
4138
  if (! elf_flags_init (obfd))
4139
    {
4140
      /* This happens when ld starts out with a 'blank' output file.  */
4141
      elf_flags_init (obfd) = TRUE;
4142
 
4143
      /* We ignore the linker-set mach, and instead set it according to
4144
         the first input file.  This would also happen if we could
4145
         somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4146
         This allows us to keep the same linker config across
4147
         cris(v0..v10) and crisv32.  The drawback is that we can't force
4148
         the output type, which might be a sane thing to do for a
4149
         v10+v32 compatibility object.  */
4150
      if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4151
        return FALSE;
4152
    }
4153
 
4154
  if (bfd_get_symbol_leading_char (ibfd)
4155
      != bfd_get_symbol_leading_char (obfd))
4156
    {
4157
      (*_bfd_error_handler)
4158
        (bfd_get_symbol_leading_char (ibfd) == '_'
4159
         ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4160
         : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4161
         ibfd);
4162
      bfd_set_error (bfd_error_bad_value);
4163
      return FALSE;
4164
    }
4165
 
4166
  omach = bfd_get_mach (obfd);
4167
 
4168
  if (imach != omach)
4169
    {
4170
      /* We can get an incompatible combination only if either is
4171
         bfd_mach_cris_v32, and the other one isn't compatible.  */
4172
      if ((imach == bfd_mach_cris_v32
4173
           && omach != bfd_mach_cris_v10_v32)
4174
          || (omach == bfd_mach_cris_v32
4175
              && imach != bfd_mach_cris_v10_v32))
4176
        {
4177
          (*_bfd_error_handler)
4178
            ((imach == bfd_mach_cris_v32)
4179
             ? _("%B contains CRIS v32 code, incompatible"
4180
                 " with previous objects")
4181
             : _("%B contains non-CRIS-v32 code, incompatible"
4182
                 " with previous objects"),
4183
             ibfd);
4184
          bfd_set_error (bfd_error_bad_value);
4185
          return FALSE;
4186
        }
4187
 
4188
      /* We don't have to check the case where the input is compatible
4189
         with v10 and v32, because the output is already known to be set
4190
         to the other (compatible) mach.  */
4191
      if (omach == bfd_mach_cris_v10_v32
4192
          && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4193
        return FALSE;
4194
    }
4195
 
4196
  return TRUE;
4197
}
4198
 
4199
/* Do side-effects of e_flags copying to obfd.  */
4200
 
4201
static bfd_boolean
4202
cris_elf_copy_private_bfd_data (ibfd, obfd)
4203
     bfd *ibfd;
4204
     bfd *obfd;
4205
{
4206
  /* Call the base function.  */
4207
  if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4208
    return FALSE;
4209
 
4210
  /* If output is big-endian for some obscure reason, stop here.  */
4211
  if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4212
    return FALSE;
4213
 
4214
  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4215
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4216
    return TRUE;
4217
 
4218
  /* Do what we really came here for.  */
4219
  return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4220
}
4221
 
4222
static enum elf_reloc_type_class
4223
elf_cris_reloc_type_class (rela)
4224
     const Elf_Internal_Rela *rela;
4225
{
4226
  enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4227
  switch (r_type)
4228
    {
4229
    case R_CRIS_RELATIVE:
4230
      return reloc_class_relative;
4231
    case R_CRIS_JUMP_SLOT:
4232
      return reloc_class_plt;
4233
    case R_CRIS_COPY:
4234
      return reloc_class_copy;
4235
    default:
4236
      return reloc_class_normal;
4237
    }
4238
}
4239
 
4240
/* The elf_backend_got_elt_size worker.  For one symbol, we can have up to
4241
   two GOT entries from three types with two different sizes.  We handle
4242
   it as a single entry, so we can use the regular offset-calculation
4243
   machinery.  */
4244
 
4245
static bfd_vma
4246
elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4247
                       struct bfd_link_info *info ATTRIBUTE_UNUSED,
4248
                       struct elf_link_hash_entry *hr,
4249
                       bfd *ibfd,
4250
                       unsigned long symndx)
4251
{
4252
  struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4253
  bfd_vma eltsiz = 0;
4254
 
4255
  /* We may have one regular GOT entry or up to two TLS GOT
4256
     entries.  */
4257
  if (h == NULL)
4258
    {
4259
      Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4260
      bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4261
 
4262
      BFD_ASSERT (local_got_refcounts != NULL);
4263
 
4264
      if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4265
        {
4266
          /* We can't have a variable referred to both as a regular
4267
             variable and through TLS relocs.  */
4268
          BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4269
                      && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4270
          return 4;
4271
        }
4272
 
4273
      if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4274
        eltsiz += 8;
4275
 
4276
      if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4277
        eltsiz += 4;
4278
    }
4279
  else
4280
    {
4281
      struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4282
      if (hh->reg_got_refcount > 0)
4283
        {
4284
          /* The actual error-on-input is emitted elsewhere.  */
4285
          BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4286
          return 4;
4287
        }
4288
 
4289
      if (hh->dtp_refcount > 0)
4290
        eltsiz += 8;
4291
 
4292
      if (hh->tprel_refcount > 0)
4293
        eltsiz += 4;
4294
    }
4295
 
4296
  /* We're only called when h->got.refcount is non-zero, so we must
4297
     have a non-zero size.  */
4298
  BFD_ASSERT (eltsiz != 0);
4299
  return eltsiz;
4300
}
4301
 
4302
#define ELF_ARCH                bfd_arch_cris
4303
#define ELF_MACHINE_CODE        EM_CRIS
4304
#define ELF_MAXPAGESIZE         0x2000
4305
 
4306
#define TARGET_LITTLE_SYM       bfd_elf32_cris_vec
4307
#define TARGET_LITTLE_NAME      "elf32-cris"
4308
#define elf_symbol_leading_char 0
4309
 
4310
#define elf_info_to_howto_rel                   NULL
4311
#define elf_info_to_howto                       cris_info_to_howto_rela
4312
#define elf_backend_relocate_section            cris_elf_relocate_section
4313
#define elf_backend_gc_mark_hook                cris_elf_gc_mark_hook
4314
#define elf_backend_gc_sweep_hook               cris_elf_gc_sweep_hook
4315
#define elf_backend_check_relocs                cris_elf_check_relocs
4316
#define elf_backend_grok_prstatus               cris_elf_grok_prstatus
4317
#define elf_backend_grok_psinfo                 cris_elf_grok_psinfo
4318
 
4319
#define elf_backend_can_gc_sections             1
4320
#define elf_backend_can_refcount                1
4321
 
4322
#define elf_backend_object_p                    cris_elf_object_p
4323
#define elf_backend_final_write_processing \
4324
        cris_elf_final_write_processing
4325
#define bfd_elf32_bfd_print_private_bfd_data \
4326
        cris_elf_print_private_bfd_data
4327
#define bfd_elf32_bfd_merge_private_bfd_data \
4328
        cris_elf_merge_private_bfd_data
4329
#define bfd_elf32_bfd_copy_private_bfd_data \
4330
        cris_elf_copy_private_bfd_data
4331
 
4332
#define bfd_elf32_bfd_reloc_type_lookup         cris_reloc_type_lookup
4333
#define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
4334
 
4335
#define bfd_elf32_bfd_link_hash_table_create \
4336
        elf_cris_link_hash_table_create
4337
#define elf_backend_adjust_dynamic_symbol \
4338
        elf_cris_adjust_dynamic_symbol
4339
#define elf_backend_copy_indirect_symbol \
4340
        elf_cris_copy_indirect_symbol
4341
#define elf_backend_size_dynamic_sections \
4342
        elf_cris_size_dynamic_sections
4343
#define elf_backend_init_index_section          _bfd_elf_init_1_index_section
4344
#define elf_backend_finish_dynamic_symbol \
4345
        elf_cris_finish_dynamic_symbol
4346
#define elf_backend_finish_dynamic_sections \
4347
        elf_cris_finish_dynamic_sections
4348
#define elf_backend_create_dynamic_sections \
4349
        _bfd_elf_create_dynamic_sections
4350
#define bfd_elf32_bfd_final_link \
4351
        bfd_elf_gc_common_final_link
4352
#define elf_backend_hide_symbol                 elf_cris_hide_symbol
4353
#define elf_backend_reloc_type_class            elf_cris_reloc_type_class
4354
 
4355
#define elf_backend_want_got_plt        1
4356
#define elf_backend_plt_readonly        1
4357
#define elf_backend_want_plt_sym        0
4358
#define elf_backend_got_header_size     12
4359
#define elf_backend_got_elt_size elf_cris_got_elt_size
4360
 
4361
/* Later, we my want to optimize RELA entries into REL entries for dynamic
4362
   linking and libraries (if it's a win of any significance).  Until then,
4363
   take the easy route.  */
4364
#define elf_backend_may_use_rel_p 0
4365
#define elf_backend_may_use_rela_p 1
4366
#define elf_backend_rela_normal         1
4367
 
4368
#include "elf32-target.h"
4369
 
4370
#undef TARGET_LITTLE_SYM
4371
#undef TARGET_LITTLE_NAME
4372
#undef elf_symbol_leading_char
4373
 
4374
#define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
4375
#define TARGET_LITTLE_NAME "elf32-us-cris"
4376
#define elf_symbol_leading_char '_'
4377
#undef elf32_bed
4378
#define elf32_bed elf32_us_cris_bed
4379
 
4380
#include "elf32-target.h"

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