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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [bfd/] [elf-bfd.h] - Blame information for rev 816

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1 227 jeremybenn
/* BFD back-end data structures for ELF files.
2
   Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3
   2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4
   Free Software Foundation, Inc.
5
   Written by Cygnus Support.
6
 
7
   This file is part of BFD, the Binary File Descriptor library.
8
 
9
   This program is free software; you can redistribute it and/or modify
10
   it under the terms of the GNU General Public License as published by
11
   the Free Software Foundation; either version 3 of the License, or
12
   (at your option) any later version.
13
 
14
   This program is distributed in the hope that it will be useful,
15
   but WITHOUT ANY WARRANTY; without even the implied warranty of
16
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
   GNU General Public License for more details.
18
 
19
   You should have received a copy of the GNU General Public License
20
   along with this program; if not, write to the Free Software
21
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22
   MA 02110-1301, USA.  */
23
 
24
#ifndef _LIBELF_H_
25
#define _LIBELF_H_ 1
26
 
27
#include "elf/common.h"
28
#include "elf/external.h"
29
#include "elf/internal.h"
30
#include "bfdlink.h"
31
 
32
/* The number of entries in a section is its size divided by the size
33
   of a single entry.  This is normally only applicable to reloc and
34
   symbol table sections.
35
   PR 9934: It is possible to have relocations that do not refer to
36
   symbols, thus it is also possible to have a relocation section in
37
   an object file, but no symbol table.  */
38
#define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
39
 
40
/* If size isn't specified as 64 or 32, NAME macro should fail.  */
41
#ifndef NAME
42
#if ARCH_SIZE == 64
43
#define NAME(x, y) x ## 64 ## _ ## y
44
#endif
45
#if ARCH_SIZE == 32
46
#define NAME(x, y) x ## 32 ## _ ## y
47
#endif
48
#endif
49
 
50
#ifndef NAME
51
#define NAME(x, y) x ## NOSIZE ## _ ## y
52
#endif
53
 
54
#define ElfNAME(X)      NAME(Elf,X)
55
#define elfNAME(X)      NAME(elf,X)
56
 
57
/* Information held for an ELF symbol.  The first field is the
58
   corresponding asymbol.  Every symbol is an ELF file is actually a
59
   pointer to this structure, although it is often handled as a
60
   pointer to an asymbol.  */
61
 
62
typedef struct
63
{
64
  /* The BFD symbol.  */
65
  asymbol symbol;
66
  /* ELF symbol information.  */
67
  Elf_Internal_Sym internal_elf_sym;
68
  /* Backend specific information.  */
69
  union
70
    {
71
      unsigned int hppa_arg_reloc;
72
      void *mips_extr;
73
      void *any;
74
    }
75
  tc_data;
76
 
77
  /* Version information.  This is from an Elf_Internal_Versym
78
     structure in a SHT_GNU_versym section.  It is zero if there is no
79
     version information.  */
80
  unsigned short version;
81
 
82
} elf_symbol_type;
83
 
84
struct elf_strtab_hash;
85
struct got_entry;
86
struct plt_entry;
87
 
88
union gotplt_union
89
  {
90
    bfd_signed_vma refcount;
91
    bfd_vma offset;
92
    struct got_entry *glist;
93
    struct plt_entry *plist;
94
  };
95
 
96
struct elf_link_virtual_table_entry
97
  {
98
    /* Virtual table entry use information.  This array is nominally of size
99
       size/sizeof(target_void_pointer), though we have to be able to assume
100
       and track a size while the symbol is still undefined.  It is indexed
101
       via offset/sizeof(target_void_pointer).  */
102
    size_t size;
103
    bfd_boolean *used;
104
 
105
    /* Virtual table derivation info.  */
106
    struct elf_link_hash_entry *parent;
107
  };
108
 
109
/* ELF linker hash table entries.  */
110
 
111
struct elf_link_hash_entry
112
{
113
  struct bfd_link_hash_entry root;
114
 
115
  /* Symbol index in output file.  This is initialized to -1.  It is
116
     set to -2 if the symbol is used by a reloc.  */
117
  long indx;
118
 
119
  /* Symbol index as a dynamic symbol.  Initialized to -1, and remains
120
     -1 if this is not a dynamic symbol.  */
121
  /* ??? Note that this is consistently used as a synonym for tests
122
     against whether we can perform various simplifying transformations
123
     to the code.  (E.g. changing a pc-relative jump to a PLT entry
124
     into a pc-relative jump to the target function.)  That test, which
125
     is often relatively complex, and someplaces wrong or incomplete,
126
     should really be replaced by a predicate in elflink.c.
127
 
128
     End result: this field -1 does not indicate that the symbol is
129
     not in the dynamic symbol table, but rather that the symbol is
130
     not visible outside this DSO.  */
131
  long dynindx;
132
 
133
  /* If this symbol requires an entry in the global offset table, the
134
     processor specific backend uses this field to track usage and
135
     final offset.  Two schemes are supported:  The first assumes that
136
     a symbol may only have one GOT entry, and uses REFCOUNT until
137
     size_dynamic_sections, at which point the contents of the .got is
138
     fixed.  Afterward, if OFFSET is -1, then the symbol does not
139
     require a global offset table entry.  The second scheme allows
140
     multiple GOT entries per symbol, managed via a linked list
141
     pointed to by GLIST.  */
142
  union gotplt_union got;
143
 
144
  /* Same, but tracks a procedure linkage table entry.  */
145
  union gotplt_union plt;
146
 
147
  /* Symbol size.  */
148
  bfd_size_type size;
149
 
150
  /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.).  */
151
  unsigned int type : 8;
152
 
153
  /* Symbol st_other value, symbol visibility.  */
154
  unsigned int other : 8;
155
 
156
  /* Symbol is referenced by a non-shared object (other than the object
157
     in which it is defined).  */
158
  unsigned int ref_regular : 1;
159
  /* Symbol is defined by a non-shared object.  */
160
  unsigned int def_regular : 1;
161
  /* Symbol is referenced by a shared object.  */
162
  unsigned int ref_dynamic : 1;
163
  /* Symbol is defined by a shared object.  */
164
  unsigned int def_dynamic : 1;
165
  /* Symbol has a non-weak reference from a non-shared object (other than
166
     the object in which it is defined).  */
167
  unsigned int ref_regular_nonweak : 1;
168
  /* Dynamic symbol has been adjustd.  */
169
  unsigned int dynamic_adjusted : 1;
170
  /* Symbol needs a copy reloc.  */
171
  unsigned int needs_copy : 1;
172
  /* Symbol needs a procedure linkage table entry.  */
173
  unsigned int needs_plt : 1;
174
  /* Symbol appears in a non-ELF input file.  */
175
  unsigned int non_elf : 1;
176
  /* Symbol should be marked as hidden in the version information.  */
177
  unsigned int hidden : 1;
178
  /* Symbol was forced to local scope due to a version script file.  */
179
  unsigned int forced_local : 1;
180
  /* Symbol was forced to be dynamic due to a version script file.  */
181
  unsigned int dynamic : 1;
182
  /* Symbol was marked during garbage collection.  */
183
  unsigned int mark : 1;
184
  /* Symbol is referenced by a non-GOT/non-PLT relocation.  This is
185
     not currently set by all the backends.  */
186
  unsigned int non_got_ref : 1;
187
  /* Symbol has a definition in a shared object.
188
     FIXME: There is no real need for this field if def_dynamic is never
189
     cleared and all places that test def_dynamic also test def_regular.  */
190
  unsigned int dynamic_def : 1;
191
  /* Symbol is weak in all shared objects.  */
192
  unsigned int dynamic_weak : 1;
193
  /* Symbol is referenced with a relocation where C/C++ pointer equality
194
     matters.  */
195
  unsigned int pointer_equality_needed : 1;
196
  /* Symbol is a unique global symbol.  */
197
  unsigned int unique_global : 1;
198
 
199
  /* String table index in .dynstr if this is a dynamic symbol.  */
200
  unsigned long dynstr_index;
201
 
202
  union
203
  {
204
    /* If this is a weak defined symbol from a dynamic object, this
205
       field points to a defined symbol with the same value, if there is
206
       one.  Otherwise it is NULL.  */
207
    struct elf_link_hash_entry *weakdef;
208
 
209
    /* Hash value of the name computed using the ELF hash function.
210
       Used part way through size_dynamic_sections, after we've finished
211
       with weakdefs.  */
212
    unsigned long elf_hash_value;
213
  } u;
214
 
215
  /* Version information.  */
216
  union
217
  {
218
    /* This field is used for a symbol which is not defined in a
219
       regular object.  It points to the version information read in
220
       from the dynamic object.  */
221
    Elf_Internal_Verdef *verdef;
222
    /* This field is used for a symbol which is defined in a regular
223
       object.  It is set up in size_dynamic_sections.  It points to
224
       the version information we should write out for this symbol.  */
225
    struct bfd_elf_version_tree *vertree;
226
  } verinfo;
227
 
228
  struct elf_link_virtual_table_entry *vtable;
229
};
230
 
231
/* Will references to this symbol always reference the symbol
232
   in this object?  STV_PROTECTED is excluded from the visibility test
233
   here so that function pointer comparisons work properly.  Since
234
   function symbols not defined in an app are set to their .plt entry,
235
   it's necessary for shared libs to also reference the .plt even
236
   though the symbol is really local to the shared lib.  */
237
#define SYMBOL_REFERENCES_LOCAL(INFO, H) \
238
  _bfd_elf_symbol_refs_local_p (H, INFO, 0)
239
 
240
/* Will _calls_ to this symbol always call the version in this object?  */
241
#define SYMBOL_CALLS_LOCAL(INFO, H) \
242
  _bfd_elf_symbol_refs_local_p (H, INFO, 1)
243
 
244
/* Common symbols that are turned into definitions don't have the
245
   DEF_REGULAR flag set, so they might appear to be undefined.  */
246
#define ELF_COMMON_DEF_P(H) \
247
  (!(H)->def_regular                                                    \
248
   && !(H)->def_dynamic                                                 \
249
   && (H)->root.type == bfd_link_hash_defined)
250
 
251
/* Records local symbols to be emitted in the dynamic symbol table.  */
252
 
253
struct elf_link_local_dynamic_entry
254
{
255
  struct elf_link_local_dynamic_entry *next;
256
 
257
  /* The input bfd this symbol came from.  */
258
  bfd *input_bfd;
259
 
260
  /* The index of the local symbol being copied.  */
261
  long input_indx;
262
 
263
  /* The index in the outgoing dynamic symbol table.  */
264
  long dynindx;
265
 
266
  /* A copy of the input symbol.  */
267
  Elf_Internal_Sym isym;
268
};
269
 
270
struct elf_link_loaded_list
271
{
272
  struct elf_link_loaded_list *next;
273
  bfd *abfd;
274
};
275
 
276
/* Structures used by the eh_frame optimization code.  */
277
struct eh_cie_fde
278
{
279
  union {
280
    struct {
281
      /* If REMOVED == 1, this is the CIE that the FDE originally used.
282
         The CIE belongs to the same .eh_frame input section as the FDE.
283
 
284
         If REMOVED == 0, this is the CIE that we have chosen to use for
285
         the output FDE.  The CIE's REMOVED field is also 0, but the CIE
286
         might belong to a different .eh_frame input section from the FDE.  */
287
      struct eh_cie_fde *cie_inf;
288
      struct eh_cie_fde *next_for_section;
289
    } fde;
290
    struct {
291
      /* CIEs have three states:
292
 
293
         - REMOVED && !MERGED: Slated for removal because we haven't yet
294
           proven that an FDE needs it.  FULL_CIE, if nonnull, points to
295
           more detailed information about the CIE.
296
 
297
         - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
298
           which may not belong to the same input section.
299
 
300
         - !REMOVED: We have decided to keep this CIE.  SEC is the
301
           .eh_frame input section that contains the CIE.  */
302
      union {
303
        struct cie *full_cie;
304
        struct eh_cie_fde *merged_with;
305
        asection *sec;
306
      } u;
307
 
308
      /* The offset of the personality data from the start of the CIE,
309
         or 0 if the CIE doesn't have any.  */
310
      unsigned int personality_offset : 8;
311
 
312
      /* True if we have marked relocations associated with this CIE.  */
313
      unsigned int gc_mark : 1;
314
 
315
      /* True if we have decided to turn an absolute LSDA encoding into
316
         a PC-relative one.  */
317
      unsigned int make_lsda_relative : 1;
318
 
319
      /* True if we have decided to turn an absolute personality
320
         encoding into a PC-relative one.  */
321
      unsigned int make_per_encoding_relative : 1;
322
 
323
      /* True if the CIE contains personality data and if that
324
         data uses a PC-relative encoding.  Always true when
325
         make_per_encoding_relative is.  */
326
      unsigned int per_encoding_relative : 1;
327
 
328
      /* True if we need to add an 'R' (FDE encoding) entry to the
329
         CIE's augmentation data.  */
330
      unsigned int add_fde_encoding : 1;
331
 
332
      /* True if we have merged this CIE with another.  */
333
      unsigned int merged : 1;
334
 
335
      /* Unused bits.  */
336
      unsigned int pad1 : 18;
337
    } cie;
338
  } u;
339
  unsigned int reloc_index;
340
  unsigned int size;
341
  unsigned int offset;
342
  unsigned int new_offset;
343
  unsigned int fde_encoding : 8;
344
  unsigned int lsda_encoding : 8;
345
  unsigned int lsda_offset : 8;
346
 
347
  /* True if this entry represents a CIE, false if it represents an FDE.  */
348
  unsigned int cie : 1;
349
 
350
  /* True if this entry is currently marked for removal.  */
351
  unsigned int removed : 1;
352
 
353
  /* True if we need to add a 'z' (augmentation size) entry to the CIE's
354
     augmentation data, and an associated byte to each of the CIE's FDEs.  */
355
  unsigned int add_augmentation_size : 1;
356
 
357
  /* True if we have decided to convert absolute FDE relocations into
358
     relative ones.  This applies to the first relocation in the FDE,
359
     which is against the code that the FDE describes.  */
360
  unsigned int make_relative : 1;
361
 
362
  /* Unused bits.  */
363
  unsigned int pad1 : 4;
364
 
365
  unsigned int *set_loc;
366
};
367
 
368
struct eh_frame_sec_info
369
{
370
  unsigned int count;
371
  struct cie *cies;
372
  struct eh_cie_fde entry[1];
373
};
374
 
375
struct eh_frame_array_ent
376
{
377
  bfd_vma initial_loc;
378
  bfd_vma fde;
379
};
380
 
381
struct htab;
382
 
383
struct eh_frame_hdr_info
384
{
385
  struct htab *cies;
386
  asection *hdr_sec;
387
  unsigned int fde_count, array_count;
388
  struct eh_frame_array_ent *array;
389
  /* TRUE if we should try to merge CIEs between input sections.  */
390
  bfd_boolean merge_cies;
391
  /* TRUE if all .eh_frames have been parsd.  */
392
  bfd_boolean parsed_eh_frames;
393
  /* TRUE if .eh_frame_hdr should contain the sorted search table.
394
     We build it if we successfully read all .eh_frame input sections
395
     and recognize them.  */
396
  bfd_boolean table;
397
};
398
 
399
/* Enum used to identify target specific extensions to the elf_obj_tdata
400
   and elf_link_hash_table structures.  Note the enums deliberately start
401
   from 1 so that we can detect an uninitialized field.  The generic value
402
   is last so that additions to this enum do not need to modify more than
403
   one line.  */
404
enum elf_target_id
405
{
406
  ALPHA_ELF_DATA = 1,
407
  ARM_ELF_DATA,
408
  AVR_ELF_DATA,
409
  BFIN_ELF_DATA,
410
  CRIS_ELF_DATA,
411
  FRV_ELF_DATA,
412
  HPPA32_ELF_DATA,
413
  HPPA64_ELF_DATA,
414
  I386_ELF_DATA,
415
  IA64_ELF_DATA,
416
  LM32_ELF_DATA,
417
  M32R_ELF_DATA,
418
  M68HC11_ELF_DATA,
419
  M68K_ELF_DATA,
420
  MICROBLAZE_ELF_DATA,
421
  MIPS_ELF_DATA,
422
  MN10300_ELF_DATA,
423
  PPC32_ELF_DATA,
424
  PPC64_ELF_DATA,
425
  S390_ELF_DATA,
426
  SH_ELF_DATA,
427
  SPARC_ELF_DATA,
428
  SPU_ELF_DATA,
429
  X86_64_ELF_DATA,
430
  XTENSA_ELF_DATA,
431
  GENERIC_ELF_DATA
432
};
433
 
434
/* ELF linker hash table.  */
435
 
436
struct elf_link_hash_table
437
{
438
  struct bfd_link_hash_table root;
439
 
440
  /* An identifier used to distinguish different target
441
     specific extensions to this structure.  */
442
  enum elf_target_id hash_table_id;
443
 
444
  /* Whether we have created the special dynamic sections required
445
     when linking against or generating a shared object.  */
446
  bfd_boolean dynamic_sections_created;
447
 
448
  /* True if this target has relocatable executables, so needs dynamic
449
     section symbols.  */
450
  bfd_boolean is_relocatable_executable;
451
 
452
  /* The BFD used to hold special sections created by the linker.
453
     This will be the first BFD found which requires these sections to
454
     be created.  */
455
  bfd *dynobj;
456
 
457
  /* The value to use when initialising got.refcount/offset and
458
     plt.refcount/offset in an elf_link_hash_entry.  Set to zero when
459
     the values are refcounts.  Set to init_got_offset/init_plt_offset
460
     in size_dynamic_sections when the values may be offsets.  */
461
  union gotplt_union init_got_refcount;
462
  union gotplt_union init_plt_refcount;
463
 
464
  /* The value to use for got.refcount/offset and plt.refcount/offset
465
     when the values may be offsets.  Normally (bfd_vma) -1.  */
466
  union gotplt_union init_got_offset;
467
  union gotplt_union init_plt_offset;
468
 
469
  /* The number of symbols found in the link which must be put into
470
     the .dynsym section.  */
471
  bfd_size_type dynsymcount;
472
 
473
  /* The string table of dynamic symbols, which becomes the .dynstr
474
     section.  */
475
  struct elf_strtab_hash *dynstr;
476
 
477
  /* The number of buckets in the hash table in the .hash section.
478
     This is based on the number of dynamic symbols.  */
479
  bfd_size_type bucketcount;
480
 
481
  /* A linked list of DT_NEEDED names found in dynamic objects
482
     included in the link.  */
483
  struct bfd_link_needed_list *needed;
484
 
485
  /* Sections in the output bfd that provides a section symbol
486
     to be used by relocations emitted against local symbols.
487
     Most targets will not use data_index_section.  */
488
  asection *text_index_section;
489
  asection *data_index_section;
490
 
491
  /* The _GLOBAL_OFFSET_TABLE_ symbol.  */
492
  struct elf_link_hash_entry *hgot;
493
 
494
  /* The _PROCEDURE_LINKAGE_TABLE_ symbol.  */
495
  struct elf_link_hash_entry *hplt;
496
 
497
  /* A pointer to information used to merge SEC_MERGE sections.  */
498
  void *merge_info;
499
 
500
  /* Used to link stabs in sections.  */
501
  struct stab_info stab_info;
502
 
503
  /* Used by eh_frame code when editing .eh_frame.  */
504
  struct eh_frame_hdr_info eh_info;
505
 
506
  /* A linked list of local symbols to be added to .dynsym.  */
507
  struct elf_link_local_dynamic_entry *dynlocal;
508
 
509
  /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
510
     objects included in the link.  */
511
  struct bfd_link_needed_list *runpath;
512
 
513
  /* Cached first output tls section and size of PT_TLS segment.  */
514
  asection *tls_sec;
515
  bfd_size_type tls_size;
516
 
517
  /* A linked list of BFD's loaded in the link.  */
518
  struct elf_link_loaded_list *loaded;
519
 
520
  /* Short-cuts to get to dynamic linker sections.  */
521
  asection *sgot;
522
  asection *sgotplt;
523
  asection *srelgot;
524
  asection *splt;
525
  asection *srelplt;
526
  asection *igotplt;
527
  asection *iplt;
528
  asection *irelplt;
529
  asection *irelifunc;
530
};
531
 
532
/* Look up an entry in an ELF linker hash table.  */
533
 
534
#define elf_link_hash_lookup(table, string, create, copy, follow)       \
535
  ((struct elf_link_hash_entry *)                                       \
536
   bfd_link_hash_lookup (&(table)->root, (string), (create),            \
537
                         (copy), (follow)))
538
 
539
/* Traverse an ELF linker hash table.  */
540
 
541
#define elf_link_hash_traverse(table, func, info)                       \
542
  (bfd_link_hash_traverse                                               \
543
   (&(table)->root,                                                     \
544
    (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func),    \
545
    (info)))
546
 
547
/* Get the ELF linker hash table from a link_info structure.  */
548
 
549
#define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
550
 
551
#define elf_hash_table_id(table)        ((table) -> hash_table_id)
552
 
553
/* Returns TRUE if the hash table is a struct elf_link_hash_table.  */
554
#define is_elf_hash_table(htab)                                         \
555
  (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
556
 
557
/* Used by bfd_sym_from_r_symndx to cache a small number of local
558
   symbols.  */
559
#define LOCAL_SYM_CACHE_SIZE 32
560
struct sym_cache
561
{
562
  bfd *abfd;
563
  unsigned long indx[LOCAL_SYM_CACHE_SIZE];
564
  Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE];
565
};
566
 
567
/* Constant information held for an ELF backend.  */
568
 
569
struct elf_size_info {
570
  unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
571
  unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
572
 
573
  /* The size of entries in the .hash section.  */
574
  unsigned char sizeof_hash_entry;
575
 
576
  /* The number of internal relocations to allocate per external
577
     relocation entry.  */
578
  unsigned char int_rels_per_ext_rel;
579
  /* We use some fixed size arrays.  This should be large enough to
580
     handle all back-ends.  */
581
#define MAX_INT_RELS_PER_EXT_REL 3
582
 
583
  unsigned char arch_size, log_file_align;
584
  unsigned char elfclass, ev_current;
585
  int (*write_out_phdrs)
586
    (bfd *, const Elf_Internal_Phdr *, unsigned int);
587
  bfd_boolean
588
    (*write_shdrs_and_ehdr) (bfd *);
589
  bfd_boolean (*checksum_contents)
590
    (bfd * , void (*) (const void *, size_t, void *), void *);
591
  void (*write_relocs)
592
    (bfd *, asection *, void *);
593
  bfd_boolean (*swap_symbol_in)
594
    (bfd *, const void *, const void *, Elf_Internal_Sym *);
595
  void (*swap_symbol_out)
596
    (bfd *, const Elf_Internal_Sym *, void *, void *);
597
  bfd_boolean (*slurp_reloc_table)
598
    (bfd *, asection *, asymbol **, bfd_boolean);
599
  long (*slurp_symbol_table)
600
    (bfd *, asymbol **, bfd_boolean);
601
  void (*swap_dyn_in)
602
    (bfd *, const void *, Elf_Internal_Dyn *);
603
  void (*swap_dyn_out)
604
    (bfd *, const Elf_Internal_Dyn *, void *);
605
 
606
  /* This function is called to swap in a REL relocation.  If an
607
     external relocation corresponds to more than one internal
608
     relocation, then all relocations are swapped in at once.  */
609
  void (*swap_reloc_in)
610
    (bfd *, const bfd_byte *, Elf_Internal_Rela *);
611
 
612
  /* This function is called to swap out a REL relocation.  */
613
  void (*swap_reloc_out)
614
    (bfd *, const Elf_Internal_Rela *, bfd_byte *);
615
 
616
  /* This function is called to swap in a RELA relocation.  If an
617
     external relocation corresponds to more than one internal
618
     relocation, then all relocations are swapped in at once.  */
619
  void (*swap_reloca_in)
620
    (bfd *, const bfd_byte *, Elf_Internal_Rela *);
621
 
622
  /* This function is called to swap out a RELA relocation.  */
623
  void (*swap_reloca_out)
624
    (bfd *, const Elf_Internal_Rela *, bfd_byte *);
625
};
626
 
627
#define elf_symbol_from(ABFD,S) \
628
        (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
629
          && (S)->the_bfd->tdata.elf_obj_data != 0) \
630
         ? (elf_symbol_type *) (S) \
631
         : 0)
632
 
633
enum elf_reloc_type_class {
634
  reloc_class_normal,
635
  reloc_class_relative,
636
  reloc_class_plt,
637
  reloc_class_copy
638
};
639
 
640
struct elf_reloc_cookie
641
{
642
  Elf_Internal_Rela *rels, *rel, *relend;
643
  Elf_Internal_Sym *locsyms;
644
  bfd *abfd;
645
  size_t locsymcount;
646
  size_t extsymoff;
647
  struct elf_link_hash_entry **sym_hashes;
648
  int r_sym_shift;
649
  bfd_boolean bad_symtab;
650
};
651
 
652
/* The level of IRIX compatibility we're striving for.  */
653
 
654
typedef enum {
655
  ict_none,
656
  ict_irix5,
657
  ict_irix6
658
} irix_compat_t;
659
 
660
/* Mapping of ELF section names and types.  */
661
struct bfd_elf_special_section
662
{
663
  const char *prefix;
664
  int prefix_length;
665
  /* 0 means name must match PREFIX exactly.
666
     -1 means name must start with PREFIX followed by an arbitrary string.
667
     -2 means name must match PREFIX exactly or consist of PREFIX followed
668
     by a dot then anything.
669
     > 0 means name must start with the first PREFIX_LENGTH chars of
670
     PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX.  */
671
  int suffix_length;
672
  int type;
673
  bfd_vma attr;
674
};
675
 
676
enum action_discarded
677
  {
678
    COMPLAIN = 1,
679
    PRETEND = 2
680
  };
681
 
682
typedef asection * (*elf_gc_mark_hook_fn)
683
  (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
684
   struct elf_link_hash_entry *, Elf_Internal_Sym *);
685
 
686
struct elf_backend_data
687
{
688
  /* The architecture for this backend.  */
689
  enum bfd_architecture arch;
690
 
691
  /* The ELF machine code (EM_xxxx) for this backend.  */
692
  int elf_machine_code;
693
 
694
  /* EI_OSABI. */
695
  int elf_osabi;
696
 
697
  /* The maximum page size for this backend.  */
698
  bfd_vma maxpagesize;
699
 
700
  /* The minimum page size for this backend.  An input object will not be
701
     considered page aligned unless its sections are correctly aligned for
702
     pages at least this large.  May be smaller than maxpagesize.  */
703
  bfd_vma minpagesize;
704
 
705
  /* The common page size for this backend.  */
706
  bfd_vma commonpagesize;
707
 
708
  /* The BFD flags applied to sections created for dynamic linking.  */
709
  flagword dynamic_sec_flags;
710
 
711
  /* A function to translate an ELF RELA relocation to a BFD arelent
712
     structure.  */
713
  void (*elf_info_to_howto)
714
    (bfd *, arelent *, Elf_Internal_Rela *);
715
 
716
  /* A function to translate an ELF REL relocation to a BFD arelent
717
     structure.  */
718
  void (*elf_info_to_howto_rel)
719
    (bfd *, arelent *, Elf_Internal_Rela *);
720
 
721
  /* A function to determine whether a symbol is global when
722
     partitioning the symbol table into local and global symbols.
723
     This should be NULL for most targets, in which case the correct
724
     thing will be done.  MIPS ELF, at least on the Irix 5, has
725
     special requirements.  */
726
  bfd_boolean (*elf_backend_sym_is_global)
727
    (bfd *, asymbol *);
728
 
729
  /* The remaining functions are hooks which are called only if they
730
     are not NULL.  */
731
 
732
  /* A function to permit a backend specific check on whether a
733
     particular BFD format is relevant for an object file, and to
734
     permit the backend to set any global information it wishes.  When
735
     this is called elf_elfheader is set, but anything else should be
736
     used with caution.  If this returns FALSE, the check_format
737
     routine will return a bfd_error_wrong_format error.  */
738
  bfd_boolean (*elf_backend_object_p)
739
    (bfd *);
740
 
741
  /* A function to do additional symbol processing when reading the
742
     ELF symbol table.  This is where any processor-specific special
743
     section indices are handled.  */
744
  void (*elf_backend_symbol_processing)
745
    (bfd *, asymbol *);
746
 
747
  /* A function to do additional symbol processing after reading the
748
     entire ELF symbol table.  */
749
  bfd_boolean (*elf_backend_symbol_table_processing)
750
    (bfd *, elf_symbol_type *, unsigned int);
751
 
752
  /* A function to set the type of the info field.  Processor-specific
753
     types should be handled here.  */
754
  int (*elf_backend_get_symbol_type)
755
    (Elf_Internal_Sym *, int);
756
 
757
  /* A function to return the linker hash table entry of a symbol that
758
     might be satisfied by an archive symbol.  */
759
  struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
760
    (bfd *, struct bfd_link_info *, const char *);
761
 
762
  /* Return true if local section symbols should have a non-null st_name.
763
     NULL implies false.  */
764
  bfd_boolean (*elf_backend_name_local_section_symbols)
765
    (bfd *);
766
 
767
  /* A function to do additional processing on the ELF section header
768
     just before writing it out.  This is used to set the flags and
769
     type fields for some sections, or to actually write out data for
770
     unusual sections.  */
771
  bfd_boolean (*elf_backend_section_processing)
772
    (bfd *, Elf_Internal_Shdr *);
773
 
774
  /* A function to handle unusual section types when creating BFD
775
     sections from ELF sections.  */
776
  bfd_boolean (*elf_backend_section_from_shdr)
777
    (bfd *, Elf_Internal_Shdr *, const char *, int);
778
 
779
  /* A function to convert machine dependent ELF section header flags to
780
     BFD internal section header flags.  */
781
  bfd_boolean (*elf_backend_section_flags)
782
    (flagword *, const Elf_Internal_Shdr *);
783
 
784
  /* A function that returns a struct containing ELF section flags and
785
     type for the given BFD section.   */
786
  const struct bfd_elf_special_section * (*get_sec_type_attr)
787
    (bfd *, asection *);
788
 
789
  /* A function to handle unusual program segment types when creating BFD
790
     sections from ELF program segments.  */
791
  bfd_boolean (*elf_backend_section_from_phdr)
792
    (bfd *, Elf_Internal_Phdr *, int, const char *);
793
 
794
  /* A function to set up the ELF section header for a BFD section in
795
     preparation for writing it out.  This is where the flags and type
796
     fields are set for unusual sections.  */
797
  bfd_boolean (*elf_backend_fake_sections)
798
    (bfd *, Elf_Internal_Shdr *, asection *);
799
 
800
  /* A function to get the ELF section index for a BFD section.  If
801
     this returns TRUE, the section was found.  If it is a normal ELF
802
     section, *RETVAL should be left unchanged.  If it is not a normal
803
     ELF section *RETVAL should be set to the SHN_xxxx index.  */
804
  bfd_boolean (*elf_backend_section_from_bfd_section)
805
    (bfd *, asection *, int *retval);
806
 
807
  /* If this field is not NULL, it is called by the add_symbols phase
808
     of a link just before adding a symbol to the global linker hash
809
     table.  It may modify any of the fields as it wishes.  If *NAME
810
     is set to NULL, the symbol will be skipped rather than being
811
     added to the hash table.  This function is responsible for
812
     handling all processor dependent symbol bindings and section
813
     indices, and must set at least *FLAGS and *SEC for each processor
814
     dependent case; failure to do so will cause a link error.  */
815
  bfd_boolean (*elf_add_symbol_hook)
816
    (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
817
     const char **name, flagword *flags, asection **sec, bfd_vma *value);
818
 
819
  /* If this field is not NULL, it is called by the elf_link_output_sym
820
     phase of a link for each symbol which will appear in the object file.
821
     On error, this function returns 0.  1 is returned when the symbol
822
     should be output, 2 is returned when the symbol should be discarded.  */
823
  int (*elf_backend_link_output_symbol_hook)
824
    (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
825
     asection *, struct elf_link_hash_entry *);
826
 
827
  /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
828
     linker the first time it encounters a dynamic object in the link.
829
     This function must create any sections required for dynamic
830
     linking.  The ABFD argument is a dynamic object.  The .interp,
831
     .dynamic, .dynsym, .dynstr, and .hash functions have already been
832
     created, and this function may modify the section flags if
833
     desired.  This function will normally create the .got and .plt
834
     sections, but different backends have different requirements.  */
835
  bfd_boolean (*elf_backend_create_dynamic_sections)
836
    (bfd *abfd, struct bfd_link_info *info);
837
 
838
  /* When creating a shared library, determine whether to omit the
839
     dynamic symbol for the section.  */
840
  bfd_boolean (*elf_backend_omit_section_dynsym)
841
    (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
842
 
843
  /* Return TRUE if relocations of targets are compatible to the extent
844
     that CHECK_RELOCS will properly process them.  PR 4424.  */
845
  bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *);
846
 
847
  /* The CHECK_RELOCS function is called by the add_symbols phase of
848
     the ELF backend linker.  It is called once for each section with
849
     relocs of an object file, just after the symbols for the object
850
     file have been added to the global linker hash table.  The
851
     function must look through the relocs and do any special handling
852
     required.  This generally means allocating space in the global
853
     offset table, and perhaps allocating space for a reloc.  The
854
     relocs are always passed as Rela structures; if the section
855
     actually uses Rel structures, the r_addend field will always be
856
     zero.  */
857
  bfd_boolean (*check_relocs)
858
    (bfd *abfd, struct bfd_link_info *info, asection *o,
859
     const Elf_Internal_Rela *relocs);
860
 
861
  /* The CHECK_DIRECTIVES function is called once per input file by
862
     the add_symbols phase of the ELF backend linker.  The function
863
     must inspect the bfd and create any additional symbols according
864
     to any custom directives in the bfd.  */
865
  bfd_boolean (*check_directives)
866
    (bfd *abfd, struct bfd_link_info *info);
867
 
868
  /* The AS_NEEDED_CLEANUP function is called once per --as-needed
869
     input file that was not needed by the add_symbols phase of the
870
     ELF backend linker.  The function must undo any target specific
871
     changes in the symbol hash table.  */
872
  bfd_boolean (*as_needed_cleanup)
873
    (bfd *abfd, struct bfd_link_info *info);
874
 
875
  /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
876
     linker for every symbol which is defined by a dynamic object and
877
     referenced by a regular object.  This is called after all the
878
     input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
879
     function has been called.  The hash table entry should be
880
     bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
881
     defined in a section from a dynamic object.  Dynamic object
882
     sections are not included in the final link, and this function is
883
     responsible for changing the value to something which the rest of
884
     the link can deal with.  This will normally involve adding an
885
     entry to the .plt or .got or some such section, and setting the
886
     symbol to point to that.  */
887
  bfd_boolean (*elf_backend_adjust_dynamic_symbol)
888
    (struct bfd_link_info *info, struct elf_link_hash_entry *h);
889
 
890
  /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
891
     after all the linker input files have been seen but before the
892
     section sizes have been set.  This is called after
893
     ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS.  */
894
  bfd_boolean (*elf_backend_always_size_sections)
895
    (bfd *output_bfd, struct bfd_link_info *info);
896
 
897
  /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
898
     linker after all the linker input files have been seen but before
899
     the sections sizes have been set.  This is called after
900
     ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
901
     It is only called when linking against a dynamic object.  It must
902
     set the sizes of the dynamic sections, and may fill in their
903
     contents as well.  The generic ELF linker can handle the .dynsym,
904
     .dynstr and .hash sections.  This function must handle the
905
     .interp section and any sections created by the
906
     CREATE_DYNAMIC_SECTIONS entry point.  */
907
  bfd_boolean (*elf_backend_size_dynamic_sections)
908
    (bfd *output_bfd, struct bfd_link_info *info);
909
 
910
  /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
911
     we keep to use as a base for relocs and symbols.  */
912
  void (*elf_backend_init_index_section)
913
    (bfd *output_bfd, struct bfd_link_info *info);
914
 
915
  /* The RELOCATE_SECTION function is called by the ELF backend linker
916
     to handle the relocations for a section.
917
 
918
     The relocs are always passed as Rela structures; if the section
919
     actually uses Rel structures, the r_addend field will always be
920
     zero.
921
 
922
     This function is responsible for adjust the section contents as
923
     necessary, and (if using Rela relocs and generating a
924
     relocatable output file) adjusting the reloc addend as
925
     necessary.
926
 
927
     This function does not have to worry about setting the reloc
928
     address or the reloc symbol index.
929
 
930
     LOCAL_SYMS is a pointer to the swapped in local symbols.
931
 
932
     LOCAL_SECTIONS is an array giving the section in the input file
933
     corresponding to the st_shndx field of each local symbol.
934
 
935
     The global hash table entry for the global symbols can be found
936
     via elf_sym_hashes (input_bfd).
937
 
938
     When generating relocatable output, this function must handle
939
     STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
940
     going to be the section symbol corresponding to the output
941
     section, which means that the addend must be adjusted
942
     accordingly.
943
 
944
     Returns FALSE on error, TRUE on success, 2 if successful and
945
     relocations should be written for this section.  */
946
  int (*elf_backend_relocate_section)
947
    (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
948
     asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
949
     Elf_Internal_Sym *local_syms, asection **local_sections);
950
 
951
  /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
952
     linker just before it writes a symbol out to the .dynsym section.
953
     The processor backend may make any required adjustment to the
954
     symbol.  It may also take the opportunity to set contents of the
955
     dynamic sections.  Note that FINISH_DYNAMIC_SYMBOL is called on
956
     all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
957
     on those symbols which are defined by a dynamic object.  */
958
  bfd_boolean (*elf_backend_finish_dynamic_symbol)
959
    (bfd *output_bfd, struct bfd_link_info *info,
960
     struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
961
 
962
  /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
963
     linker just before it writes all the dynamic sections out to the
964
     output file.  The FINISH_DYNAMIC_SYMBOL will have been called on
965
     all dynamic symbols.  */
966
  bfd_boolean (*elf_backend_finish_dynamic_sections)
967
    (bfd *output_bfd, struct bfd_link_info *info);
968
 
969
  /* A function to do any beginning processing needed for the ELF file
970
     before building the ELF headers and computing file positions.  */
971
  void (*elf_backend_begin_write_processing)
972
    (bfd *, struct bfd_link_info *);
973
 
974
  /* A function to do any final processing needed for the ELF file
975
     before writing it out.  The LINKER argument is TRUE if this BFD
976
     was created by the ELF backend linker.  */
977
  void (*elf_backend_final_write_processing)
978
    (bfd *, bfd_boolean linker);
979
 
980
  /* This function is called by get_program_header_size.  It should
981
     return the number of additional program segments which this BFD
982
     will need.  It should return -1 on error.  */
983
  int (*elf_backend_additional_program_headers)
984
    (bfd *, struct bfd_link_info *);
985
 
986
  /* This function is called to modify an existing segment map in a
987
     backend specific fashion.  */
988
  bfd_boolean (*elf_backend_modify_segment_map)
989
    (bfd *, struct bfd_link_info *);
990
 
991
  /* This function is called to modify program headers just before
992
     they are written.  */
993
  bfd_boolean (*elf_backend_modify_program_headers)
994
    (bfd *, struct bfd_link_info *);
995
 
996
  /* This function is called before section garbage collection to
997
     mark entry symbol sections.  */
998
  void (*gc_keep)
999
    (struct bfd_link_info *);
1000
 
1001
  /* This function is called during section garbage collection to
1002
     mark sections that define global symbols.  */
1003
  bfd_boolean (*gc_mark_dynamic_ref)
1004
    (struct elf_link_hash_entry *, void *);
1005
 
1006
  /* This function is called during section gc to discover the section a
1007
     particular relocation refers to.  */
1008
  elf_gc_mark_hook_fn gc_mark_hook;
1009
 
1010
  /* This function, if defined, is called after the first gc marking pass
1011
     to allow the backend to mark additional sections.  */
1012
  bfd_boolean (*gc_mark_extra_sections)
1013
    (struct bfd_link_info *, elf_gc_mark_hook_fn);
1014
 
1015
  /* This function, if defined, is called during the sweep phase of gc
1016
     in order that a backend might update any data structures it might
1017
     be maintaining.  */
1018
  bfd_boolean (*gc_sweep_hook)
1019
    (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
1020
 
1021
  /* This function, if defined, is called after the ELF headers have
1022
     been created.  This allows for things like the OS and ABI versions
1023
     to be changed.  */
1024
  void (*elf_backend_post_process_headers)
1025
    (bfd *, struct bfd_link_info *);
1026
 
1027
  /* This function, if defined, prints a symbol to file and returns the
1028
     name of the symbol to be printed.  It should return NULL to fall
1029
     back to default symbol printing.  */
1030
  const char *(*elf_backend_print_symbol_all)
1031
    (bfd *, void *, asymbol *);
1032
 
1033
  /* This function, if defined, is called after all local symbols and
1034
     global symbols converted to locals are emitted into the symtab
1035
     section.  It allows the backend to emit special local symbols
1036
     not handled in the hash table.  */
1037
  bfd_boolean (*elf_backend_output_arch_local_syms)
1038
    (bfd *, struct bfd_link_info *, void *,
1039
     bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1040
                      struct elf_link_hash_entry *));
1041
 
1042
  /* This function, if defined, is called after all symbols are emitted
1043
     into the symtab section.  It allows the backend to emit special
1044
     global symbols not handled in the hash table.  */
1045
  bfd_boolean (*elf_backend_output_arch_syms)
1046
    (bfd *, struct bfd_link_info *, void *,
1047
     bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1048
                      struct elf_link_hash_entry *));
1049
 
1050
  /* Copy any information related to dynamic linking from a pre-existing
1051
     symbol to a newly created symbol.  Also called to copy flags and
1052
     other back-end info to a weakdef, in which case the symbol is not
1053
     newly created and plt/got refcounts and dynamic indices should not
1054
     be copied.  */
1055
  void (*elf_backend_copy_indirect_symbol)
1056
    (struct bfd_link_info *, struct elf_link_hash_entry *,
1057
     struct elf_link_hash_entry *);
1058
 
1059
  /* Modify any information related to dynamic linking such that the
1060
     symbol is not exported.  */
1061
  void (*elf_backend_hide_symbol)
1062
    (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1063
 
1064
  /* A function to do additional symbol fixup, called by
1065
     _bfd_elf_fix_symbol_flags.  */
1066
  bfd_boolean (*elf_backend_fixup_symbol)
1067
    (struct bfd_link_info *, struct elf_link_hash_entry *);
1068
 
1069
  /* Merge the backend specific symbol attribute.  */
1070
  void (*elf_backend_merge_symbol_attribute)
1071
    (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
1072
     bfd_boolean);
1073
 
1074
  /* This function, if defined, will return a string containing the
1075
     name of a target-specific dynamic tag.  */
1076
  char *(*elf_backend_get_target_dtag)
1077
    (bfd_vma);
1078
 
1079
  /* Decide whether an undefined symbol is special and can be ignored.
1080
     This is the case for OPTIONAL symbols on IRIX.  */
1081
  bfd_boolean (*elf_backend_ignore_undef_symbol)
1082
    (struct elf_link_hash_entry *);
1083
 
1084
  /* Emit relocations.  Overrides default routine for emitting relocs,
1085
     except during a relocatable link, or if all relocs are being emitted.  */
1086
  bfd_boolean (*elf_backend_emit_relocs)
1087
    (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1088
     struct elf_link_hash_entry **);
1089
 
1090
  /* Count relocations.  Not called for relocatable links
1091
     or if all relocs are being preserved in the output.  */
1092
  unsigned int (*elf_backend_count_relocs)
1093
    (struct bfd_link_info *, asection *);
1094
 
1095
  /* This function, if defined, is called when an NT_PRSTATUS note is found
1096
     in a core file.  */
1097
  bfd_boolean (*elf_backend_grok_prstatus)
1098
    (bfd *, Elf_Internal_Note *);
1099
 
1100
  /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1101
     note is found in a core file.  */
1102
  bfd_boolean (*elf_backend_grok_psinfo)
1103
    (bfd *, Elf_Internal_Note *);
1104
 
1105
  /* This function, if defined, is called to write a note to a corefile.  */
1106
  char *(*elf_backend_write_core_note)
1107
    (bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
1108
 
1109
  /* This function returns class of a reloc type.  */
1110
  enum elf_reloc_type_class (*elf_backend_reloc_type_class)
1111
    (const Elf_Internal_Rela *);
1112
 
1113
  /* This function, if defined, removes information about discarded functions
1114
     from other sections which mention them.  */
1115
  bfd_boolean (*elf_backend_discard_info)
1116
    (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
1117
 
1118
  /* This function, if defined, signals that the function above has removed
1119
     the discarded relocations for this section.  */
1120
  bfd_boolean (*elf_backend_ignore_discarded_relocs)
1121
    (asection *);
1122
 
1123
  /* What to do when ld finds relocations against symbols defined in
1124
     discarded sections.  */
1125
  unsigned int (*action_discarded)
1126
    (asection *);
1127
 
1128
  /* This function returns the width of FDE pointers in bytes, or 0 if
1129
     that can't be determined for some reason.  The default definition
1130
     goes by the bfd's EI_CLASS.  */
1131
  unsigned int (*elf_backend_eh_frame_address_size)
1132
    (bfd *, asection *);
1133
 
1134
  /* These functions tell elf-eh-frame whether to attempt to turn
1135
     absolute or lsda encodings into pc-relative ones.  The default
1136
     definition enables these transformations.  */
1137
  bfd_boolean (*elf_backend_can_make_relative_eh_frame)
1138
     (bfd *, struct bfd_link_info *, asection *);
1139
  bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
1140
     (bfd *, struct bfd_link_info *, asection *);
1141
 
1142
  /* This function returns an encoding after computing the encoded
1143
     value (and storing it in ENCODED) for the given OFFSET into OSEC,
1144
     to be stored in at LOC_OFFSET into the LOC_SEC input section.
1145
     The default definition chooses a 32-bit PC-relative encoding.  */
1146
  bfd_byte (*elf_backend_encode_eh_address)
1147
     (bfd *abfd, struct bfd_link_info *info,
1148
      asection *osec, bfd_vma offset,
1149
      asection *loc_sec, bfd_vma loc_offset,
1150
      bfd_vma *encoded);
1151
 
1152
  /* This function, if defined, may write out the given section.
1153
     Returns TRUE if it did so and FALSE if the caller should.  */
1154
  bfd_boolean (*elf_backend_write_section)
1155
    (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1156
 
1157
  /* The level of IRIX compatibility we're striving for.
1158
     MIPS ELF specific function.  */
1159
  irix_compat_t (*elf_backend_mips_irix_compat)
1160
    (bfd *);
1161
 
1162
  reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1163
    (unsigned int, bfd_boolean);
1164
 
1165
  /* The swapping table to use when dealing with ECOFF information.
1166
     Used for the MIPS ELF .mdebug section.  */
1167
  const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1168
 
1169
  /* This function implements `bfd_elf_bfd_from_remote_memory';
1170
     see elf.c, elfcode.h.  */
1171
  bfd *(*elf_backend_bfd_from_remote_memory)
1172
     (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1173
      int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len));
1174
 
1175
  /* This function is used by `_bfd_elf_get_synthetic_symtab';
1176
     see elf.c.  */
1177
  bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1178
 
1179
  /* Is symbol defined in common section?  */
1180
  bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1181
 
1182
  /* Return a common section index for section.  */
1183
  unsigned int (*common_section_index) (asection *);
1184
 
1185
  /* Return a common section for section.  */
1186
  asection *(*common_section) (asection *);
1187
 
1188
  /* Return TRUE if we can merge 2 definitions.  */
1189
  bfd_boolean (*merge_symbol) (struct bfd_link_info *,
1190
                               struct elf_link_hash_entry **,
1191
                               struct elf_link_hash_entry *,
1192
                               Elf_Internal_Sym *, asection **,
1193
                               bfd_vma *, unsigned int *,
1194
                               bfd_boolean *, bfd_boolean *,
1195
                               bfd_boolean *, bfd_boolean *,
1196
                               bfd_boolean *, bfd_boolean *,
1197
                               bfd_boolean *, bfd_boolean *,
1198
                               bfd *, asection **,
1199
                               bfd_boolean *, bfd_boolean *,
1200
                               bfd_boolean *, bfd_boolean *,
1201
                               bfd *, asection **);
1202
 
1203
  /* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
1204
  bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *);
1205
 
1206
  /* Return TRUE if type is a function symbol type.  */
1207
  bfd_boolean (*is_function_type) (unsigned int type);
1208
 
1209
  /* Used to handle bad SHF_LINK_ORDER input.  */
1210
  bfd_error_handler_type link_order_error_handler;
1211
 
1212
  /* Name of the PLT relocation section.  */
1213
  const char *relplt_name;
1214
 
1215
  /* Alternate EM_xxxx machine codes for this backend.  */
1216
  int elf_machine_alt1;
1217
  int elf_machine_alt2;
1218
 
1219
  const struct elf_size_info *s;
1220
 
1221
  /* An array of target specific special sections.  */
1222
  const struct bfd_elf_special_section *special_sections;
1223
 
1224
  /* The size in bytes of the header for the GOT.  This includes the
1225
     so-called reserved entries on some systems.  */
1226
  bfd_vma got_header_size;
1227
 
1228
  /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1229
     otherwise by the local symbol with index SYMNDX in IBFD.  */
1230
  bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *,
1231
                           struct elf_link_hash_entry *h,
1232
                           bfd *ibfd, unsigned long symndx);
1233
 
1234
  /* The vendor name to use for a processor-standard attributes section.  */
1235
  const char *obj_attrs_vendor;
1236
 
1237
  /* The section name to use for a processor-standard attributes section.  */
1238
  const char *obj_attrs_section;
1239
 
1240
  /* Return 1, 2 or 3 to indicate what type of arguments a
1241
     processor-specific tag takes.  */
1242
  int (*obj_attrs_arg_type) (int);
1243
 
1244
  /* The section type to use for an attributes section.  */
1245
  unsigned int obj_attrs_section_type;
1246
 
1247
  /* This function determines the order in which any attributes are written.
1248
     It must be defined for input in the range 4..NUM_KNOWN_OBJ_ATTRIBUTES-1
1249
     (this range is used in order to make unity easy).  The returned value is
1250
     the actual tag number to place in the input position.  */
1251
  int (*obj_attrs_order) (int);
1252
 
1253
  /* This is TRUE if the linker should act like collect and gather
1254
     global constructors and destructors by name.  This is TRUE for
1255
     MIPS ELF because the Irix 5 tools can not handle the .init
1256
     section.  */
1257
  unsigned collect : 1;
1258
 
1259
  /* This is TRUE if the linker should ignore changes to the type of a
1260
     symbol.  This is TRUE for MIPS ELF because some Irix 5 objects
1261
     record undefined functions as STT_OBJECT although the definitions
1262
     are STT_FUNC.  */
1263
  unsigned type_change_ok : 1;
1264
 
1265
  /* Whether the backend may use REL relocations.  (Some backends use
1266
     both REL and RELA relocations, and this flag is set for those
1267
     backends.)  */
1268
  unsigned may_use_rel_p : 1;
1269
 
1270
  /* Whether the backend may use RELA relocations.  (Some backends use
1271
     both REL and RELA relocations, and this flag is set for those
1272
     backends.)  */
1273
  unsigned may_use_rela_p : 1;
1274
 
1275
  /* Whether the default relocation type is RELA.  If a backend with
1276
     this flag set wants REL relocations for a particular section,
1277
     it must note that explicitly.  Similarly, if this flag is clear,
1278
     and the backend wants RELA relocations for a particular
1279
     section.  */
1280
  unsigned default_use_rela_p : 1;
1281
 
1282
  /* True if PLT and copy relocations should be RELA by default.  */
1283
  unsigned rela_plts_and_copies_p : 1;
1284
 
1285
  /* Set if RELA relocations for a relocatable link can be handled by
1286
     generic code.  Backends that set this flag need do nothing in the
1287
     backend relocate_section routine for relocatable linking.  */
1288
  unsigned rela_normal : 1;
1289
 
1290
  /* TRUE if addresses "naturally" sign extend.  This is used when
1291
     swapping in from Elf32 when BFD64.  */
1292
  unsigned sign_extend_vma : 1;
1293
 
1294
  unsigned want_got_plt : 1;
1295
  unsigned plt_readonly : 1;
1296
  unsigned want_plt_sym : 1;
1297
  unsigned plt_not_loaded : 1;
1298
  unsigned plt_alignment : 4;
1299
  unsigned can_gc_sections : 1;
1300
  unsigned can_refcount : 1;
1301
  unsigned want_got_sym : 1;
1302
  unsigned want_dynbss : 1;
1303
 
1304
  /* Targets which do not support physical addressing often require
1305
     that the p_paddr field in the section header to be set to zero.
1306
     This field indicates whether this behavior is required.  */
1307
  unsigned want_p_paddr_set_to_zero : 1;
1308
 
1309
  /* True if an object file lacking a .note.GNU-stack section
1310
     should be assumed to be requesting exec stack.  At least one
1311
     other file in the link needs to have a .note.GNU-stack section
1312
     for a PT_GNU_STACK segment to be created.  */
1313
  unsigned default_execstack : 1;
1314
};
1315
 
1316
/* Information stored for each BFD section in an ELF file.  This
1317
   structure is allocated by elf_new_section_hook.  */
1318
 
1319
struct bfd_elf_section_data
1320
{
1321
  /* The ELF header for this section.  */
1322
  Elf_Internal_Shdr this_hdr;
1323
 
1324
  /* The ELF header for the reloc section associated with this
1325
     section, if any.  */
1326
  Elf_Internal_Shdr rel_hdr;
1327
 
1328
  /* If there is a second reloc section associated with this section,
1329
     as can happen on Irix 6, this field points to the header.  */
1330
  Elf_Internal_Shdr *rel_hdr2;
1331
 
1332
  /* The number of relocations currently assigned to REL_HDR.  */
1333
  unsigned int rel_count;
1334
 
1335
  /* The number of relocations currently assigned to REL_HDR2.  */
1336
  unsigned int rel_count2;
1337
 
1338
  /* The ELF section number of this section.  */
1339
  int this_idx;
1340
 
1341
  /* The ELF section number of the reloc section indicated by
1342
     REL_HDR if any.  Only used for an output file.  */
1343
  int rel_idx;
1344
 
1345
  /* The ELF section number of the reloc section indicated by
1346
     REL_HDR2 if any.  Only used for an output file.  */
1347
  int rel_idx2;
1348
 
1349
  /* Used by the backend linker when generating a shared library to
1350
     record the dynamic symbol index for a section symbol
1351
     corresponding to this section.  A value of 0 means that there is
1352
     no dynamic symbol for this section.  */
1353
  int dynindx;
1354
 
1355
  /* A pointer to the linked-to section for SHF_LINK_ORDER.  */
1356
  asection *linked_to;
1357
 
1358
  /* Used by the backend linker to store the symbol hash table entries
1359
     associated with relocs against global symbols.  */
1360
  struct elf_link_hash_entry **rel_hashes;
1361
 
1362
  /* A pointer to the swapped relocs.  If the section uses REL relocs,
1363
     rather than RELA, all the r_addend fields will be zero.  This
1364
     pointer may be NULL.  It is used by the backend linker.  */
1365
  Elf_Internal_Rela *relocs;
1366
 
1367
  /* A pointer to a linked list tracking dynamic relocs copied for
1368
     local symbols.  */
1369
  void *local_dynrel;
1370
 
1371
  /* A pointer to the bfd section used for dynamic relocs.  */
1372
  asection *sreloc;
1373
 
1374
  union {
1375
    /* Group name, if this section is a member of a group.  */
1376
    const char *name;
1377
 
1378
    /* Group signature sym, if this is the SHT_GROUP section.  */
1379
    struct bfd_symbol *id;
1380
  } group;
1381
 
1382
  /* For a member of a group, points to the SHT_GROUP section.
1383
     NULL for the SHT_GROUP section itself and non-group sections.  */
1384
  asection *sec_group;
1385
 
1386
  /* A linked list of member sections in the group.  Circular when used by
1387
     the linker.  For the SHT_GROUP section, points at first member.  */
1388
  asection *next_in_group;
1389
 
1390
  /* The FDEs associated with this section.  The u.fde.next_in_section
1391
     field acts as a chain pointer.  */
1392
  struct eh_cie_fde *fde_list;
1393
 
1394
  /* A pointer used for various section optimizations.  */
1395
  void *sec_info;
1396
};
1397
 
1398
#define elf_section_data(sec)  ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1399
#define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1400
#define elf_section_type(sec)  (elf_section_data(sec)->this_hdr.sh_type)
1401
#define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1402
#define elf_group_name(sec)    (elf_section_data(sec)->group.name)
1403
#define elf_group_id(sec)      (elf_section_data(sec)->group.id)
1404
#define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1405
#define elf_fde_list(sec)      (elf_section_data(sec)->fde_list)
1406
#define elf_sec_group(sec)      (elf_section_data(sec)->sec_group)
1407
 
1408
#define xvec_get_elf_backend_data(xvec) \
1409
  ((const struct elf_backend_data *) (xvec)->backend_data)
1410
 
1411
#define get_elf_backend_data(abfd) \
1412
   xvec_get_elf_backend_data ((abfd)->xvec)
1413
 
1414
/* The maximum number of known object attributes for any target.  */
1415
#define NUM_KNOWN_OBJ_ATTRIBUTES 71
1416
 
1417
/* The value of an object attribute.  The type indicates whether the attribute
1418
   holds and integer, a string, or both.  It can also indicate that there can
1419
   be no default (i.e. all values must be written to file, even zero).  */
1420
 
1421
typedef struct obj_attribute
1422
{
1423
#define ATTR_TYPE_FLAG_INT_VAL    (1 << 0)
1424
#define ATTR_TYPE_FLAG_STR_VAL    (1 << 1)
1425
#define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1426
 
1427
#define ATTR_TYPE_HAS_INT_VAL(TYPE)     ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1428
#define ATTR_TYPE_HAS_STR_VAL(TYPE)     ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1429
#define ATTR_TYPE_HAS_NO_DEFAULT(TYPE)  ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1430
 
1431
  int type;
1432
  unsigned int i;
1433
  char *s;
1434
} obj_attribute;
1435
 
1436
typedef struct obj_attribute_list
1437
{
1438
  struct obj_attribute_list *next;
1439
  int tag;
1440
  obj_attribute attr;
1441
} obj_attribute_list;
1442
 
1443
/* Object attributes may either be defined by the processor ABI, index
1444
   OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1445
   (and possibly also processor-specific), index OBJ_ATTR_GNU.  */
1446
#define OBJ_ATTR_PROC 0
1447
#define OBJ_ATTR_GNU 1
1448
#define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1449
#define OBJ_ATTR_LAST OBJ_ATTR_GNU
1450
 
1451
/* The following object attribute tags are taken as generic, for all
1452
   targets and for "gnu" where there is no target standard.  */
1453
enum
1454
{
1455
  Tag_NULL = 0,
1456
  Tag_File = 1,
1457
  Tag_Section = 2,
1458
  Tag_Symbol = 3,
1459
  Tag_compatibility = 32
1460
};
1461
 
1462
/* Some private data is stashed away for future use using the tdata pointer
1463
   in the bfd structure.  */
1464
 
1465
struct elf_obj_tdata
1466
{
1467
  Elf_Internal_Ehdr elf_header[1];      /* Actual data, but ref like ptr */
1468
  Elf_Internal_Shdr **elf_sect_ptr;
1469
  Elf_Internal_Phdr *phdr;
1470
  struct elf_segment_map *segment_map;
1471
  struct elf_strtab_hash *strtab_ptr;
1472
  int num_locals;
1473
  int num_globals;
1474
  unsigned int num_elf_sections;        /* elf_sect_ptr size */
1475
  int num_section_syms;
1476
  asymbol **section_syms;               /* STT_SECTION symbols for each section */
1477
  Elf_Internal_Shdr symtab_hdr;
1478
  Elf_Internal_Shdr shstrtab_hdr;
1479
  Elf_Internal_Shdr strtab_hdr;
1480
  Elf_Internal_Shdr dynsymtab_hdr;
1481
  Elf_Internal_Shdr dynstrtab_hdr;
1482
  Elf_Internal_Shdr dynversym_hdr;
1483
  Elf_Internal_Shdr dynverref_hdr;
1484
  Elf_Internal_Shdr dynverdef_hdr;
1485
  Elf_Internal_Shdr symtab_shndx_hdr;
1486
  unsigned int symtab_section, shstrtab_section;
1487
  unsigned int strtab_section, dynsymtab_section;
1488
  unsigned int symtab_shndx_section;
1489
  unsigned int dynversym_section, dynverdef_section, dynverref_section;
1490
  file_ptr next_file_pos;
1491
  bfd_vma gp;                           /* The gp value */
1492
  unsigned int gp_size;                 /* The gp size */
1493
 
1494
  /* Information grabbed from an elf core file.  */
1495
  int core_signal;
1496
  int core_pid;
1497
  int core_lwpid;
1498
  char* core_program;
1499
  char* core_command;
1500
 
1501
  /* A mapping from external symbols to entries in the linker hash
1502
     table, used when linking.  This is indexed by the symbol index
1503
     minus the sh_info field of the symbol table header.  */
1504
  struct elf_link_hash_entry **sym_hashes;
1505
 
1506
  /* Track usage and final offsets of GOT entries for local symbols.
1507
     This array is indexed by symbol index.  Elements are used
1508
     identically to "got" in struct elf_link_hash_entry.  */
1509
  union
1510
    {
1511
      bfd_signed_vma *refcounts;
1512
      bfd_vma *offsets;
1513
      struct got_entry **ents;
1514
    } local_got;
1515
 
1516
  /* The linker ELF emulation code needs to let the backend ELF linker
1517
     know what filename should be used for a dynamic object if the
1518
     dynamic object is found using a search.  The emulation code then
1519
     sometimes needs to know what name was actually used.  Until the
1520
     file has been added to the linker symbol table, this field holds
1521
     the name the linker wants.  After it has been added, it holds the
1522
     name actually used, which will be the DT_SONAME entry if there is
1523
     one.  */
1524
  const char *dt_name;
1525
 
1526
  /* The linker emulation needs to know what audit libs
1527
     are used by a dynamic object.  */
1528
  const char *dt_audit;
1529
 
1530
  /* Records the result of `get_program_header_size'.  */
1531
  bfd_size_type program_header_size;
1532
 
1533
  /* Used by find_nearest_line entry point.  */
1534
  void *line_info;
1535
 
1536
  /* Used by MIPS ELF find_nearest_line entry point.  The structure
1537
     could be included directly in this one, but there's no point to
1538
     wasting the memory just for the infrequently called
1539
     find_nearest_line.  */
1540
  struct mips_elf_find_line *find_line_info;
1541
 
1542
  /* A place to stash dwarf1 info for this bfd.  */
1543
  struct dwarf1_debug *dwarf1_find_line_info;
1544
 
1545
  /* A place to stash dwarf2 info for this bfd.  */
1546
  void *dwarf2_find_line_info;
1547
 
1548
  /* An array of stub sections indexed by symbol number, used by the
1549
     MIPS ELF linker.  FIXME: We should figure out some way to only
1550
     include this field for a MIPS ELF target.  */
1551
  asection **local_stubs;
1552
  asection **local_call_stubs;
1553
 
1554
  /* Used to determine if PT_GNU_EH_FRAME segment header should be
1555
     created.  */
1556
  asection *eh_frame_hdr;
1557
 
1558
  Elf_Internal_Shdr **group_sect_ptr;
1559
  int num_group;
1560
 
1561
  /* Number of symbol version definitions we are about to emit.  */
1562
  unsigned int cverdefs;
1563
 
1564
  /* Number of symbol version references we are about to emit.  */
1565
  unsigned int cverrefs;
1566
 
1567
  /* Segment flags for the PT_GNU_STACK segment.  */
1568
  unsigned int stack_flags;
1569
 
1570
  /* Symbol version definitions in external objects.  */
1571
  Elf_Internal_Verdef *verdef;
1572
 
1573
  /* Symbol version references to external objects.  */
1574
  Elf_Internal_Verneed *verref;
1575
 
1576
  /* The Irix 5 support uses two virtual sections, which represent
1577
     text/data symbols defined in dynamic objects.  */
1578
  asymbol *elf_data_symbol;
1579
  asymbol *elf_text_symbol;
1580
  asection *elf_data_section;
1581
  asection *elf_text_section;
1582
 
1583
  /* A pointer to the .eh_frame section.  */
1584
  asection *eh_frame_section;
1585
 
1586
  /* Whether a dyanmic object was specified normally on the linker
1587
     command line, or was specified when --as-needed was in effect,
1588
     or was found via a DT_NEEDED entry.  */
1589
  enum dynamic_lib_link_class dyn_lib_class;
1590
 
1591
  /* This is set to TRUE if the object was created by the backend
1592
     linker.  */
1593
  bfd_boolean linker;
1594
 
1595
  /* Irix 5 often screws up the symbol table, sorting local symbols
1596
     after global symbols.  This flag is set if the symbol table in
1597
     this BFD appears to be screwed up.  If it is, we ignore the
1598
     sh_info field in the symbol table header, and always read all the
1599
     symbols.  */
1600
  bfd_boolean bad_symtab;
1601
 
1602
  /* Used to determine if the e_flags field has been initialized */
1603
  bfd_boolean flags_init;
1604
 
1605
  /* Symbol buffer.  */
1606
  void *symbuf;
1607
 
1608
  obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
1609
  obj_attribute_list *other_obj_attributes[2];
1610
 
1611
  /* Called at the end of _bfd_elf_write_object_contents if not NULL.  */
1612
  bfd_boolean (*after_write_object_contents) (bfd *);
1613
  void *after_write_object_contents_info;
1614
 
1615
  /* NT_GNU_BUILD_ID note type.  */
1616
  bfd_size_type build_id_size;
1617
  bfd_byte *build_id;
1618
 
1619
  /* True if the bfd contains symbols that have the STT_GNU_IFUNC
1620
     symbol type.  Used to set the osabi field in the ELF header
1621
     structure.  */
1622
  bfd_boolean has_ifunc_symbols;
1623
 
1624
  /* An identifier used to distinguish different target
1625
     specific extensions to this structure.  */
1626
  enum elf_target_id object_id;
1627
};
1628
 
1629
#define elf_tdata(bfd)          ((bfd) -> tdata.elf_obj_data)
1630
 
1631
#define elf_object_id(bfd)      (elf_tdata(bfd) -> object_id)
1632
#define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size)
1633
#define elf_elfheader(bfd)      (elf_tdata(bfd) -> elf_header)
1634
#define elf_elfsections(bfd)    (elf_tdata(bfd) -> elf_sect_ptr)
1635
#define elf_numsections(bfd)    (elf_tdata(bfd) -> num_elf_sections)
1636
#define elf_shstrtab(bfd)       (elf_tdata(bfd) -> strtab_ptr)
1637
#define elf_onesymtab(bfd)      (elf_tdata(bfd) -> symtab_section)
1638
#define elf_symtab_shndx(bfd)   (elf_tdata(bfd) -> symtab_shndx_section)
1639
#define elf_symtab_hdr(bfd)     (elf_tdata(bfd) -> symtab_hdr)
1640
#define elf_dynsymtab(bfd)      (elf_tdata(bfd) -> dynsymtab_section)
1641
#define elf_dynversym(bfd)      (elf_tdata(bfd) -> dynversym_section)
1642
#define elf_dynverdef(bfd)      (elf_tdata(bfd) -> dynverdef_section)
1643
#define elf_dynverref(bfd)      (elf_tdata(bfd) -> dynverref_section)
1644
#define elf_eh_frame_section(bfd) \
1645
                                (elf_tdata(bfd) -> eh_frame_section)
1646
#define elf_num_locals(bfd)     (elf_tdata(bfd) -> num_locals)
1647
#define elf_num_globals(bfd)    (elf_tdata(bfd) -> num_globals)
1648
#define elf_section_syms(bfd)   (elf_tdata(bfd) -> section_syms)
1649
#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1650
#define core_prpsinfo(bfd)      (elf_tdata(bfd) -> prpsinfo)
1651
#define core_prstatus(bfd)      (elf_tdata(bfd) -> prstatus)
1652
#define elf_gp(bfd)             (elf_tdata(bfd) -> gp)
1653
#define elf_gp_size(bfd)        (elf_tdata(bfd) -> gp_size)
1654
#define elf_sym_hashes(bfd)     (elf_tdata(bfd) -> sym_hashes)
1655
#define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1656
#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1657
#define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1658
#define elf_dt_name(bfd)        (elf_tdata(bfd) -> dt_name)
1659
#define elf_dt_audit(bfd)       (elf_tdata(bfd) -> dt_audit)
1660
#define elf_dyn_lib_class(bfd)  (elf_tdata(bfd) -> dyn_lib_class)
1661
#define elf_bad_symtab(bfd)     (elf_tdata(bfd) -> bad_symtab)
1662
#define elf_flags_init(bfd)     (elf_tdata(bfd) -> flags_init)
1663
#define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1664
#define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1665
#define elf_known_obj_attributes_proc(bfd) \
1666
  (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1667
#define elf_other_obj_attributes_proc(bfd) \
1668
  (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1669
 
1670
extern void _bfd_elf_swap_verdef_in
1671
  (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1672
extern void _bfd_elf_swap_verdef_out
1673
  (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1674
extern void _bfd_elf_swap_verdaux_in
1675
  (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1676
extern void _bfd_elf_swap_verdaux_out
1677
  (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1678
extern void _bfd_elf_swap_verneed_in
1679
  (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1680
extern void _bfd_elf_swap_verneed_out
1681
  (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1682
extern void _bfd_elf_swap_vernaux_in
1683
  (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1684
extern void _bfd_elf_swap_vernaux_out
1685
  (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1686
extern void _bfd_elf_swap_versym_in
1687
  (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1688
extern void _bfd_elf_swap_versym_out
1689
  (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1690
 
1691
extern unsigned int _bfd_elf_section_from_bfd_section
1692
  (bfd *, asection *);
1693
extern char *bfd_elf_string_from_elf_section
1694
  (bfd *, unsigned, unsigned);
1695
extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1696
  (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1697
   Elf_External_Sym_Shndx *);
1698
extern const char *bfd_elf_sym_name
1699
  (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1700
 
1701
extern bfd_boolean _bfd_elf_copy_private_bfd_data
1702
  (bfd *, bfd *);
1703
extern bfd_boolean _bfd_elf_print_private_bfd_data
1704
  (bfd *, void *);
1705
extern void bfd_elf_print_symbol
1706
  (bfd *, void *, asymbol *, bfd_print_symbol_type);
1707
 
1708
extern unsigned int _bfd_elf_eh_frame_address_size
1709
  (bfd *, asection *);
1710
extern bfd_byte _bfd_elf_encode_eh_address
1711
  (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1712
   asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1713
extern bfd_boolean _bfd_elf_can_make_relative
1714
  (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1715
 
1716
extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1717
  (const Elf_Internal_Rela *);
1718
extern bfd_vma _bfd_elf_rela_local_sym
1719
  (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1720
extern bfd_vma _bfd_elf_rel_local_sym
1721
  (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1722
extern bfd_vma _bfd_elf_section_offset
1723
  (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1724
 
1725
extern unsigned long bfd_elf_hash
1726
  (const char *);
1727
extern unsigned long bfd_elf_gnu_hash
1728
  (const char *);
1729
 
1730
extern bfd_reloc_status_type bfd_elf_generic_reloc
1731
  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
1732
extern bfd_boolean bfd_elf_allocate_object
1733
  (bfd *, size_t, enum elf_target_id);
1734
extern bfd_boolean bfd_elf_make_generic_object
1735
  (bfd *);
1736
extern bfd_boolean bfd_elf_mkcorefile
1737
  (bfd *);
1738
extern bfd_boolean _bfd_elf_make_section_from_shdr
1739
  (bfd *, Elf_Internal_Shdr *, const char *, int);
1740
extern bfd_boolean _bfd_elf_make_section_from_phdr
1741
  (bfd *, Elf_Internal_Phdr *, int, const char *);
1742
extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1743
  (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
1744
extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1745
  (bfd *);
1746
extern void _bfd_elf_link_hash_copy_indirect
1747
  (struct bfd_link_info *, struct elf_link_hash_entry *,
1748
   struct elf_link_hash_entry *);
1749
extern void _bfd_elf_link_hash_hide_symbol
1750
  (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1751
extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1752
  (struct bfd_link_info *, struct elf_link_hash_entry *);
1753
extern bfd_boolean _bfd_elf_link_hash_table_init
1754
  (struct elf_link_hash_table *, bfd *,
1755
   struct bfd_hash_entry *(*)
1756
     (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
1757
   unsigned int, enum elf_target_id);
1758
extern bfd_boolean _bfd_elf_slurp_version_tables
1759
  (bfd *, bfd_boolean);
1760
extern bfd_boolean _bfd_elf_merge_sections
1761
  (bfd *, struct bfd_link_info *);
1762
extern bfd_boolean _bfd_elf_match_sections_by_type
1763
  (bfd *, const asection *, bfd *, const asection *);
1764
extern bfd_boolean bfd_elf_is_group_section
1765
  (bfd *, const struct bfd_section *);
1766
extern void _bfd_elf_section_already_linked
1767
  (bfd *, struct bfd_section *, struct bfd_link_info *);
1768
extern void bfd_elf_set_group_contents
1769
  (bfd *, asection *, void *);
1770
extern asection *_bfd_elf_check_kept_section
1771
  (asection *, struct bfd_link_info *);
1772
extern void _bfd_elf_link_just_syms
1773
  (asection *, struct bfd_link_info *);
1774
extern void _bfd_elf_copy_link_hash_symbol_type
1775
  (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *);
1776
extern bfd_boolean _bfd_elf_copy_private_header_data
1777
  (bfd *, bfd *);
1778
extern bfd_boolean _bfd_elf_copy_private_symbol_data
1779
  (bfd *, asymbol *, bfd *, asymbol *);
1780
#define _bfd_generic_init_private_section_data \
1781
  _bfd_elf_init_private_section_data
1782
extern bfd_boolean _bfd_elf_init_private_section_data
1783
  (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
1784
extern bfd_boolean _bfd_elf_copy_private_section_data
1785
  (bfd *, asection *, bfd *, asection *);
1786
extern bfd_boolean _bfd_elf_write_object_contents
1787
  (bfd *);
1788
extern bfd_boolean _bfd_elf_write_corefile_contents
1789
  (bfd *);
1790
extern bfd_boolean _bfd_elf_set_section_contents
1791
  (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
1792
extern long _bfd_elf_get_symtab_upper_bound
1793
  (bfd *);
1794
extern long _bfd_elf_canonicalize_symtab
1795
  (bfd *, asymbol **);
1796
extern long _bfd_elf_get_dynamic_symtab_upper_bound
1797
  (bfd *);
1798
extern long _bfd_elf_canonicalize_dynamic_symtab
1799
  (bfd *, asymbol **);
1800
extern long _bfd_elf_get_synthetic_symtab
1801
  (bfd *, long, asymbol **, long, asymbol **, asymbol **);
1802
extern long _bfd_elf_get_reloc_upper_bound
1803
  (bfd *, sec_ptr);
1804
extern long _bfd_elf_canonicalize_reloc
1805
  (bfd *, sec_ptr, arelent **, asymbol **);
1806
extern asection * _bfd_elf_get_dynamic_reloc_section
1807
  (bfd *, asection *, bfd_boolean);
1808
extern asection * _bfd_elf_make_dynamic_reloc_section
1809
  (asection *, bfd *, unsigned int, bfd *, bfd_boolean);
1810
extern long _bfd_elf_get_dynamic_reloc_upper_bound
1811
  (bfd *);
1812
extern long _bfd_elf_canonicalize_dynamic_reloc
1813
  (bfd *, arelent **, asymbol **);
1814
extern asymbol *_bfd_elf_make_empty_symbol
1815
  (bfd *);
1816
extern void _bfd_elf_get_symbol_info
1817
  (bfd *, asymbol *, symbol_info *);
1818
extern bfd_boolean _bfd_elf_is_local_label_name
1819
  (bfd *, const char *);
1820
extern alent *_bfd_elf_get_lineno
1821
  (bfd *, asymbol *);
1822
extern bfd_boolean _bfd_elf_set_arch_mach
1823
  (bfd *, enum bfd_architecture, unsigned long);
1824
extern bfd_boolean _bfd_elf_find_nearest_line
1825
  (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1826
   unsigned int *);
1827
extern bfd_boolean _bfd_elf_find_line
1828
  (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
1829
#define _bfd_generic_find_line _bfd_elf_find_line
1830
extern bfd_boolean _bfd_elf_find_inliner_info
1831
  (bfd *, const char **, const char **, unsigned int *);
1832
#define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1833
#define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1834
extern int _bfd_elf_sizeof_headers
1835
  (bfd *, struct bfd_link_info *);
1836
extern bfd_boolean _bfd_elf_new_section_hook
1837
  (bfd *, asection *);
1838
extern bfd_boolean _bfd_elf_init_reloc_shdr
1839
  (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean);
1840
extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
1841
  (const char *, const struct bfd_elf_special_section *, unsigned int);
1842
extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1843
  (bfd *, asection *);
1844
 
1845
/* If the target doesn't have reloc handling written yet:  */
1846
extern void _bfd_elf_no_info_to_howto
1847
  (bfd *, arelent *, Elf_Internal_Rela *);
1848
 
1849
extern bfd_boolean bfd_section_from_shdr
1850
  (bfd *, unsigned int shindex);
1851
extern bfd_boolean bfd_section_from_phdr
1852
  (bfd *, Elf_Internal_Phdr *, int);
1853
 
1854
extern int _bfd_elf_symbol_from_bfd_symbol
1855
  (bfd *, asymbol **);
1856
 
1857
extern Elf_Internal_Sym *bfd_sym_from_r_symndx
1858
  (struct sym_cache *, bfd *, unsigned long);
1859
extern asection *bfd_section_from_elf_index
1860
  (bfd *, unsigned int);
1861
extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1862
  (void);
1863
 
1864
extern struct elf_strtab_hash * _bfd_elf_strtab_init
1865
  (void);
1866
extern void _bfd_elf_strtab_free
1867
  (struct elf_strtab_hash *);
1868
extern bfd_size_type _bfd_elf_strtab_add
1869
  (struct elf_strtab_hash *, const char *, bfd_boolean);
1870
extern void _bfd_elf_strtab_addref
1871
  (struct elf_strtab_hash *, bfd_size_type);
1872
extern void _bfd_elf_strtab_delref
1873
  (struct elf_strtab_hash *, bfd_size_type);
1874
extern void _bfd_elf_strtab_clear_all_refs
1875
  (struct elf_strtab_hash *);
1876
extern bfd_size_type _bfd_elf_strtab_size
1877
  (struct elf_strtab_hash *);
1878
extern bfd_size_type _bfd_elf_strtab_offset
1879
  (struct elf_strtab_hash *, bfd_size_type);
1880
extern bfd_boolean _bfd_elf_strtab_emit
1881
  (bfd *, struct elf_strtab_hash *);
1882
extern void _bfd_elf_strtab_finalize
1883
  (struct elf_strtab_hash *);
1884
 
1885
extern void _bfd_elf_begin_eh_frame_parsing
1886
  (struct bfd_link_info *info);
1887
extern void _bfd_elf_parse_eh_frame
1888
  (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
1889
extern void _bfd_elf_end_eh_frame_parsing
1890
  (struct bfd_link_info *info);
1891
 
1892
extern bfd_boolean _bfd_elf_discard_section_eh_frame
1893
  (bfd *, struct bfd_link_info *, asection *,
1894
   bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
1895
extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1896
  (bfd *, struct bfd_link_info *);
1897
extern bfd_vma _bfd_elf_eh_frame_section_offset
1898
  (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1899
extern bfd_boolean _bfd_elf_write_section_eh_frame
1900
  (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1901
extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1902
  (bfd *, struct bfd_link_info *);
1903
extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1904
  (struct bfd_link_info *);
1905
 
1906
extern bfd_boolean _bfd_elf_merge_symbol
1907
  (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1908
   asection **, bfd_vma *, unsigned int *,
1909
   struct elf_link_hash_entry **, bfd_boolean *,
1910
   bfd_boolean *, bfd_boolean *, bfd_boolean *);
1911
 
1912
extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
1913
 
1914
extern long _bfd_elf_link_lookup_local_dynindx
1915
  (struct bfd_link_info *, bfd *, long);
1916
extern bfd_boolean _bfd_elf_compute_section_file_positions
1917
  (bfd *, struct bfd_link_info *);
1918
extern void _bfd_elf_assign_file_positions_for_relocs
1919
  (bfd *);
1920
extern file_ptr _bfd_elf_assign_file_position_for_section
1921
  (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
1922
 
1923
extern bfd_boolean _bfd_elf_validate_reloc
1924
  (bfd *, arelent *);
1925
 
1926
extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1927
  (bfd *, struct bfd_link_info *);
1928
extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1929
  (bfd *, struct bfd_link_info *, asection *);
1930
extern bfd_boolean _bfd_elf_create_dynamic_sections
1931
  (bfd *, struct bfd_link_info *);
1932
extern bfd_boolean _bfd_elf_create_got_section
1933
  (bfd *, struct bfd_link_info *);
1934
extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
1935
  (bfd *, struct bfd_link_info *, asection *, const char *);
1936
extern void _bfd_elf_init_1_index_section
1937
  (bfd *, struct bfd_link_info *);
1938
extern void _bfd_elf_init_2_index_sections
1939
  (bfd *, struct bfd_link_info *);
1940
 
1941
extern bfd_boolean _bfd_elfcore_make_pseudosection
1942
  (bfd *, char *, size_t, ufile_ptr);
1943
extern char *_bfd_elfcore_strndup
1944
  (bfd *, char *, size_t);
1945
 
1946
extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
1947
  (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
1948
 
1949
extern bfd_boolean _bfd_elf_link_output_relocs
1950
  (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1951
   struct elf_link_hash_entry **);
1952
 
1953
extern bfd_boolean _bfd_elf_adjust_dynamic_copy
1954
  (struct elf_link_hash_entry *, asection *);
1955
 
1956
extern bfd_boolean _bfd_elf_dynamic_symbol_p
1957
  (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1958
 
1959
extern bfd_boolean _bfd_elf_symbol_refs_local_p
1960
  (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1961
 
1962
extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
1963
  (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma);
1964
 
1965
extern bfd_boolean _bfd_elf_setup_sections
1966
  (bfd *);
1967
 
1968
extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *);
1969
 
1970
extern const bfd_target *bfd_elf32_object_p
1971
  (bfd *);
1972
extern const bfd_target *bfd_elf32_core_file_p
1973
  (bfd *);
1974
extern char *bfd_elf32_core_file_failing_command
1975
  (bfd *);
1976
extern int bfd_elf32_core_file_failing_signal
1977
  (bfd *);
1978
extern bfd_boolean bfd_elf32_core_file_matches_executable_p
1979
  (bfd *, bfd *);
1980
 
1981
extern bfd_boolean bfd_elf32_swap_symbol_in
1982
  (bfd *, const void *, const void *, Elf_Internal_Sym *);
1983
extern void bfd_elf32_swap_symbol_out
1984
  (bfd *, const Elf_Internal_Sym *, void *, void *);
1985
extern void bfd_elf32_swap_reloc_in
1986
  (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1987
extern void bfd_elf32_swap_reloc_out
1988
  (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1989
extern void bfd_elf32_swap_reloca_in
1990
  (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1991
extern void bfd_elf32_swap_reloca_out
1992
  (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1993
extern void bfd_elf32_swap_phdr_in
1994
  (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
1995
extern void bfd_elf32_swap_phdr_out
1996
  (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
1997
extern void bfd_elf32_swap_dyn_in
1998
  (bfd *, const void *, Elf_Internal_Dyn *);
1999
extern void bfd_elf32_swap_dyn_out
2000
  (bfd *, const Elf_Internal_Dyn *, void *);
2001
extern long bfd_elf32_slurp_symbol_table
2002
  (bfd *, asymbol **, bfd_boolean);
2003
extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2004
  (bfd *);
2005
extern int bfd_elf32_write_out_phdrs
2006
  (bfd *, const Elf_Internal_Phdr *, unsigned int);
2007
extern bfd_boolean bfd_elf32_checksum_contents
2008
  (bfd * , void (*) (const void *, size_t, void *), void *);
2009
extern void bfd_elf32_write_relocs
2010
  (bfd *, asection *, void *);
2011
extern bfd_boolean bfd_elf32_slurp_reloc_table
2012
  (bfd *, asection *, asymbol **, bfd_boolean);
2013
 
2014
extern const bfd_target *bfd_elf64_object_p
2015
  (bfd *);
2016
extern const bfd_target *bfd_elf64_core_file_p
2017
  (bfd *);
2018
extern char *bfd_elf64_core_file_failing_command
2019
  (bfd *);
2020
extern int bfd_elf64_core_file_failing_signal
2021
  (bfd *);
2022
extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2023
  (bfd *, bfd *);
2024
 
2025
extern bfd_boolean bfd_elf64_swap_symbol_in
2026
  (bfd *, const void *, const void *, Elf_Internal_Sym *);
2027
extern void bfd_elf64_swap_symbol_out
2028
  (bfd *, const Elf_Internal_Sym *, void *, void *);
2029
extern void bfd_elf64_swap_reloc_in
2030
  (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2031
extern void bfd_elf64_swap_reloc_out
2032
  (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2033
extern void bfd_elf64_swap_reloca_in
2034
  (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2035
extern void bfd_elf64_swap_reloca_out
2036
  (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2037
extern void bfd_elf64_swap_phdr_in
2038
  (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
2039
extern void bfd_elf64_swap_phdr_out
2040
  (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
2041
extern void bfd_elf64_swap_dyn_in
2042
  (bfd *, const void *, Elf_Internal_Dyn *);
2043
extern void bfd_elf64_swap_dyn_out
2044
  (bfd *, const Elf_Internal_Dyn *, void *);
2045
extern long bfd_elf64_slurp_symbol_table
2046
  (bfd *, asymbol **, bfd_boolean);
2047
extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2048
  (bfd *);
2049
extern int bfd_elf64_write_out_phdrs
2050
  (bfd *, const Elf_Internal_Phdr *, unsigned int);
2051
extern bfd_boolean bfd_elf64_checksum_contents
2052
  (bfd * , void (*) (const void *, size_t, void *), void *);
2053
extern void bfd_elf64_write_relocs
2054
  (bfd *, asection *, void *);
2055
extern bfd_boolean bfd_elf64_slurp_reloc_table
2056
  (bfd *, asection *, asymbol **, bfd_boolean);
2057
 
2058
extern bfd_boolean _bfd_elf_default_relocs_compatible
2059
  (const bfd_target *, const bfd_target *);
2060
 
2061
extern bfd_boolean _bfd_elf_relocs_compatible
2062
  (const bfd_target *, const bfd_target *);
2063
 
2064
extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
2065
  (bfd *, struct bfd_link_info *, const char *);
2066
extern bfd_boolean bfd_elf_link_add_symbols
2067
  (bfd *, struct bfd_link_info *);
2068
extern bfd_boolean _bfd_elf_add_dynamic_entry
2069
  (struct bfd_link_info *, bfd_vma, bfd_vma);
2070
 
2071
extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2072
  (struct bfd_link_info *, struct elf_link_hash_entry *);
2073
 
2074
extern int bfd_elf_link_record_local_dynamic_symbol
2075
  (struct bfd_link_info *, bfd *, long);
2076
 
2077
extern bfd_boolean _bfd_elf_close_and_cleanup
2078
  (bfd *);
2079
 
2080
extern bfd_boolean _bfd_elf_common_definition
2081
  (Elf_Internal_Sym *);
2082
 
2083
extern unsigned int _bfd_elf_common_section_index
2084
  (asection *);
2085
 
2086
extern asection *_bfd_elf_common_section
2087
  (asection *);
2088
 
2089
extern void _bfd_dwarf2_cleanup_debug_info
2090
  (bfd *);
2091
 
2092
extern bfd_vma _bfd_elf_default_got_elt_size
2093
(bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *,
2094
 unsigned long);
2095
 
2096
extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2097
  (bfd *, arelent *, struct bfd_symbol *, void *,
2098
   asection *, bfd *, char **);
2099
 
2100
extern bfd_boolean bfd_elf_final_link
2101
  (bfd *, struct bfd_link_info *);
2102
 
2103
extern void _bfd_elf_gc_keep
2104
  (struct bfd_link_info *info);
2105
 
2106
extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2107
  (struct elf_link_hash_entry *h, void *inf);
2108
 
2109
extern bfd_boolean bfd_elf_gc_sections
2110
  (bfd *, struct bfd_link_info *);
2111
 
2112
extern bfd_boolean bfd_elf_gc_record_vtinherit
2113
  (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2114
 
2115
extern bfd_boolean bfd_elf_gc_record_vtentry
2116
  (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2117
 
2118
extern asection *_bfd_elf_gc_mark_hook
2119
  (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
2120
   struct elf_link_hash_entry *, Elf_Internal_Sym *);
2121
 
2122
extern asection *_bfd_elf_gc_mark_rsec
2123
  (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2124
   struct elf_reloc_cookie *);
2125
 
2126
extern bfd_boolean _bfd_elf_gc_mark_reloc
2127
  (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2128
   struct elf_reloc_cookie *);
2129
 
2130
extern bfd_boolean _bfd_elf_gc_mark_fdes
2131
  (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn,
2132
   struct elf_reloc_cookie *);
2133
 
2134
extern bfd_boolean _bfd_elf_gc_mark
2135
  (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn);
2136
 
2137
extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2138
  (bfd *, struct bfd_link_info *);
2139
 
2140
extern bfd_boolean bfd_elf_gc_common_final_link
2141
  (bfd *, struct bfd_link_info *);
2142
 
2143
extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2144
  (bfd_vma, void *);
2145
 
2146
extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
2147
  (bfd *, asection *);
2148
 
2149
extern bfd_boolean _bfd_elf_map_sections_to_segments
2150
  (bfd *, struct bfd_link_info *);
2151
 
2152
extern bfd_boolean _bfd_elf_is_function_type (unsigned int);
2153
 
2154
extern int bfd_elf_get_default_section_type (flagword);
2155
 
2156
extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
2157
  (bfd * abfd, asection * section);
2158
 
2159
/* Exported interface for writing elf corefile notes. */
2160
extern char *elfcore_write_note
2161
  (bfd *, char *, int *, const char *, int, const void *, int);
2162
extern char *elfcore_write_prpsinfo
2163
  (bfd *, char *, int *, const char *, const char *);
2164
extern char *elfcore_write_prstatus
2165
  (bfd *, char *, int *, long, int, const void *);
2166
extern char * elfcore_write_pstatus
2167
  (bfd *, char *, int *, long, int, const void *);
2168
extern char *elfcore_write_prfpreg
2169
  (bfd *, char *, int *, const void *, int);
2170
extern char *elfcore_write_prxfpreg
2171
  (bfd *, char *, int *, const void *, int);
2172
extern char *elfcore_write_xstatereg
2173
  (bfd *, char *, int *, const void *, int);
2174
extern char *elfcore_write_ppc_vmx
2175
  (bfd *, char *, int *, const void *, int);
2176
extern char *elfcore_write_ppc_vsx
2177
  (bfd *, char *, int *, const void *, int);
2178
extern char *elfcore_write_s390_timer
2179
  (bfd *, char *, int *, const void *, int);
2180
extern char *elfcore_write_s390_todcmp
2181
  (bfd *, char *, int *, const void *, int);
2182
extern char *elfcore_write_s390_todpreg
2183
  (bfd *, char *, int *, const void *, int);
2184
extern char *elfcore_write_s390_ctrs
2185
  (bfd *, char *, int *, const void *, int);
2186
extern char *elfcore_write_s390_prefix
2187
  (bfd *, char *, int *, const void *, int);
2188
extern char *elfcore_write_lwpstatus
2189
  (bfd *, char *, int *, long, int, const void *);
2190
extern char *elfcore_write_register_note
2191
  (bfd *, char *, int *, const char *, const void *, int);
2192
 
2193
extern bfd *_bfd_elf32_bfd_from_remote_memory
2194
  (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2195
   int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2196
extern bfd *_bfd_elf64_bfd_from_remote_memory
2197
  (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2198
   int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2199
 
2200
extern bfd_vma bfd_elf_obj_attr_size (bfd *);
2201
extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma);
2202
extern int bfd_elf_get_obj_attr_int (bfd *, int, int);
2203
extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int);
2204
#define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2205
  bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2206
extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *);
2207
#define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2208
  bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2209
extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int,
2210
                                             const char *);
2211
#define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2212
  bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2213
                                   (INTVAL), (STRVAL))
2214
 
2215
extern char *_bfd_elf_attr_strdup (bfd *, const char *);
2216
extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
2217
extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int);
2218
extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
2219
extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
2220
 
2221
/* The linker may needs to keep track of the number of relocs that it
2222
   decides to copy as dynamic relocs in check_relocs for each symbol.
2223
   This is so that it can later discard them if they are found to be
2224
   unnecessary.  We can store the information in a field extending the
2225
   regular ELF linker hash table.  */
2226
 
2227
struct elf_dyn_relocs
2228
{
2229
  struct elf_dyn_relocs *next;
2230
 
2231
  /* The input section of the reloc.  */
2232
  asection *sec;
2233
 
2234
  /* Total number of relocs copied for the input section.  */
2235
  bfd_size_type count;
2236
 
2237
  /* Number of pc-relative relocs copied for the input section.  */
2238
  bfd_size_type pc_count;
2239
};
2240
 
2241
extern bfd_boolean _bfd_elf_create_ifunc_sections
2242
  (bfd *, struct bfd_link_info *);
2243
extern asection * _bfd_elf_create_ifunc_dyn_reloc
2244
  (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc,
2245
   struct elf_dyn_relocs **);
2246
extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2247
  (struct bfd_link_info *, struct elf_link_hash_entry *,
2248
   struct elf_dyn_relocs **, unsigned int, unsigned int);
2249
 
2250
/* Large common section.  */
2251
extern asection _bfd_elf_large_com_section;
2252
 
2253
/* Hash for local symbol with the first section id, ID, in the input
2254
   file and the local symbol index, SYM.  */
2255
#define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2256
  (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2257
   ^ (SYM) ^ ((ID) >> 16))
2258
 
2259
/* This is the condition under which finish_dynamic_symbol will be called.
2260
   If our finish_dynamic_symbol isn't called, we'll need to do something
2261
   about initializing any .plt and .got entries in relocate_section.  */
2262
#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2263
  ((DYN)                                                                \
2264
   && ((SHARED) || !(H)->forced_local)                                  \
2265
   && ((H)->dynindx != -1 || (H)->forced_local))
2266
 
2267
/* This macro is to avoid lots of duplicated code in the body
2268
   of xxx_relocate_section() in the various elfxx-xxxx.c files.  */
2269
#define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel,    \
2270
                                r_symndx, symtab_hdr, sym_hashes,       \
2271
                                h, sec, relocation,                     \
2272
                                unresolved_reloc, warned)               \
2273
  do                                                                    \
2274
    {                                                                   \
2275
      /* It seems this can happen with erroneous or unsupported         \
2276
         input (mixing a.out and elf in an archive, for example.)  */   \
2277
      if (sym_hashes == NULL)                                           \
2278
        return FALSE;                                                   \
2279
                                                                        \
2280
      h = sym_hashes[r_symndx - symtab_hdr->sh_info];                   \
2281
                                                                        \
2282
      while (h->root.type == bfd_link_hash_indirect                     \
2283
             || h->root.type == bfd_link_hash_warning)                  \
2284
        h = (struct elf_link_hash_entry *) h->root.u.i.link;            \
2285
                                                                        \
2286
      warned = FALSE;                                                   \
2287
      unresolved_reloc = FALSE;                                         \
2288
      relocation = 0;                                                    \
2289
      if (h->root.type == bfd_link_hash_defined                         \
2290
          || h->root.type == bfd_link_hash_defweak)                     \
2291
        {                                                               \
2292
          sec = h->root.u.def.section;                                  \
2293
          if (sec == NULL                                               \
2294
              || sec->output_section == NULL)                           \
2295
            /* Set a flag that will be cleared later if we find a       \
2296
               relocation value for this symbol.  output_section        \
2297
               is typically NULL for symbols satisfied by a shared      \
2298
               library.  */                                             \
2299
            unresolved_reloc = TRUE;                                    \
2300
          else                                                          \
2301
            relocation = (h->root.u.def.value                           \
2302
                          + sec->output_section->vma                    \
2303
                          + sec->output_offset);                        \
2304
        }                                                               \
2305
      else if (h->root.type == bfd_link_hash_undefweak)                 \
2306
        ;                                                               \
2307
      else if (info->unresolved_syms_in_objects == RM_IGNORE            \
2308
               && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)          \
2309
        ;                                                               \
2310
      else if (!info->relocatable)                                      \
2311
        {                                                               \
2312
          bfd_boolean err;                                              \
2313
          err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR  \
2314
                 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT);       \
2315
          if (!info->callbacks->undefined_symbol (info,                 \
2316
                                                  h->root.root.string,  \
2317
                                                  input_bfd,            \
2318
                                                  input_section,        \
2319
                                                  rel->r_offset, err))  \
2320
            return FALSE;                                               \
2321
          warned = TRUE;                                                \
2322
        }                                                               \
2323
    }                                                                   \
2324
  while (0)
2325
 
2326
/* Will a symbol be bound to the the definition within the shared
2327
   library, if any.  */
2328
#define SYMBOLIC_BIND(INFO, H) \
2329
    ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))
2330
 
2331
#endif /* _LIBELF_H_ */

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