2004-07-27 Jeff Johnston <jjohnstn@redhat.com>
[deliverable/binutils-gdb.git] / bfd / elf-bfd.h
CommitLineData
252b5132 1/* BFD back-end data structures for ELF files.
e5094212 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4a43e768 3 2002, 2003, 2004 Free Software Foundation, Inc.
252b5132
RH
4 Written by Cygnus Support.
5
5e8d7549 6 This file is part of BFD, the Binary File Descriptor library.
252b5132 7
5e8d7549
NC
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
252b5132 12
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NC
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
252b5132 17
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NC
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
252b5132
RH
21
22#ifndef _LIBELF_H_
23#define _LIBELF_H_ 1
24
25#include "elf/common.h"
26#include "elf/internal.h"
27#include "elf/external.h"
28#include "bfdlink.h"
29
d9bc7a44 30/* The number of entries in a section is its size divided by the size
51b64d56 31 of a single entry. This is normally only applicable to reloc and
d9bc7a44
NC
32 symbol table sections. */
33#define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_size / (shdr)->sh_entsize)
34
252b5132
RH
35/* If size isn't specified as 64 or 32, NAME macro should fail. */
36#ifndef NAME
c39a58e6
AM
37#if ARCH_SIZE == 64
38#define NAME(x, y) x ## 64 ## _ ## y
252b5132 39#endif
c39a58e6
AM
40#if ARCH_SIZE == 32
41#define NAME(x, y) x ## 32 ## _ ## y
252b5132
RH
42#endif
43#endif
44
45#ifndef NAME
c39a58e6 46#define NAME(x, y) x ## NOSIZE ## _ ## y
252b5132
RH
47#endif
48
49#define ElfNAME(X) NAME(Elf,X)
50#define elfNAME(X) NAME(elf,X)
51
52/* Information held for an ELF symbol. The first field is the
53 corresponding asymbol. Every symbol is an ELF file is actually a
54 pointer to this structure, although it is often handled as a
55 pointer to an asymbol. */
56
57typedef struct
58{
59 /* The BFD symbol. */
60 asymbol symbol;
61 /* ELF symbol information. */
62 Elf_Internal_Sym internal_elf_sym;
63 /* Backend specific information. */
64 union
65 {
66 unsigned int hppa_arg_reloc;
c39a58e6
AM
67 void *mips_extr;
68 void *any;
252b5132
RH
69 }
70 tc_data;
71
72 /* Version information. This is from an Elf_Internal_Versym
73 structure in a SHT_GNU_versym section. It is zero if there is no
74 version information. */
75 unsigned short version;
76
77} elf_symbol_type;
78\f
2b0f7ef9 79struct elf_strtab_hash;
5cab59f6
AM
80struct got_entry;
81struct plt_entry;
2b0f7ef9 82
252b5132
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83/* ELF linker hash table entries. */
84
85struct elf_link_hash_entry
86{
87 struct bfd_link_hash_entry root;
88
89 /* Symbol index in output file. This is initialized to -1. It is
90 set to -2 if the symbol is used by a reloc. */
91 long indx;
92
252b5132
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93 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
94 -1 if this is not a dynamic symbol. */
30b30c21
RH
95 /* ??? Note that this is consistently used as a synonym for tests
96 against whether we can perform various simplifying transformations
97 to the code. (E.g. changing a pc-relative jump to a PLT entry
98 into a pc-relative jump to the target function.) That test, which
99 is often relatively complex, and someplaces wrong or incomplete,
100 should really be replaced by a predicate in elflink.c.
101
102 End result: this field -1 does not indicate that the symbol is
103 not in the dynamic symbol table, but rather that the symbol is
104 not visible outside this DSO. */
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105 long dynindx;
106
107 /* String table index in .dynstr if this is a dynamic symbol. */
108 unsigned long dynstr_index;
109
a90b9fca
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110 /* Hash value of the name computed using the ELF hash function. */
111 unsigned long elf_hash_value;
112
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113 /* If this is a weak defined symbol from a dynamic object, this
114 field points to a defined symbol with the same value, if there is
115 one. Otherwise it is NULL. */
116 struct elf_link_hash_entry *weakdef;
117
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118 /* Version information. */
119 union
120 {
121 /* This field is used for a symbol which is not defined in a
122 regular object. It points to the version information read in
123 from the dynamic object. */
124 Elf_Internal_Verdef *verdef;
125 /* This field is used for a symbol which is defined in a regular
126 object. It is set up in size_dynamic_sections. It points to
127 the version information we should write out for this symbol. */
128 struct bfd_elf_version_tree *vertree;
129 } verinfo;
130
131 /* Virtual table entry use information. This array is nominally of size
132 size/sizeof(target_void_pointer), though we have to be able to assume
133 and track a size while the symbol is still undefined. It is indexed
134 via offset/sizeof(target_void_pointer). */
135 size_t vtable_entries_size;
b34976b6 136 bfd_boolean *vtable_entries_used;
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137
138 /* Virtual table derivation info. */
139 struct elf_link_hash_entry *vtable_parent;
140
a90b9fca
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141 /* If this symbol requires an entry in the global offset table, the
142 processor specific backend uses this field to track usage and
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143 final offset. Two schemes are supported: The first assumes that
144 a symbol may only have one GOT entry, and uses REFCOUNT until
145 size_dynamic_sections, at which point the contents of the .got is
146 fixed. Afterward, if OFFSET is -1, then the symbol does not
147 require a global offset table entry. The second scheme allows
148 multiple GOT entries per symbol, managed via a linked list
149 pointed to by GLIST. */
150 union gotplt_union
a90b9fca
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151 {
152 bfd_signed_vma refcount;
153 bfd_vma offset;
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154 struct got_entry *glist;
155 struct plt_entry *plist;
a90b9fca
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156 } got;
157
158 /* Same, but tracks a procedure linkage table entry. */
5cab59f6 159 union gotplt_union plt;
a90b9fca
AM
160
161 /* Symbol size. */
162 bfd_size_type size;
163
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164 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
165 char type;
166
9b234ee9 167 /* Symbol st_other value, symbol visibility. */
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168 unsigned char other;
169
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170 /* Some flags; legal values follow. */
171 unsigned short elf_link_hash_flags;
172 /* Symbol is referenced by a non-shared object. */
173#define ELF_LINK_HASH_REF_REGULAR 01
174 /* Symbol is defined by a non-shared object. */
175#define ELF_LINK_HASH_DEF_REGULAR 02
176 /* Symbol is referenced by a shared object. */
177#define ELF_LINK_HASH_REF_DYNAMIC 04
178 /* Symbol is defined by a shared object. */
179#define ELF_LINK_HASH_DEF_DYNAMIC 010
180 /* Symbol has a non-weak reference from a non-shared object. */
181#define ELF_LINK_HASH_REF_REGULAR_NONWEAK 020
182 /* Dynamic symbol has been adjustd. */
183#define ELF_LINK_HASH_DYNAMIC_ADJUSTED 040
184 /* Symbol needs a copy reloc. */
185#define ELF_LINK_HASH_NEEDS_COPY 0100
186 /* Symbol needs a procedure linkage table entry. */
187#define ELF_LINK_HASH_NEEDS_PLT 0200
188 /* Symbol appears in a non-ELF input file. */
189#define ELF_LINK_NON_ELF 0400
190 /* Symbol should be marked as hidden in the version information. */
191#define ELF_LINK_HIDDEN 01000
192 /* Symbol was forced to local scope due to a version script file. */
193#define ELF_LINK_FORCED_LOCAL 02000
194 /* Symbol was marked during garbage collection. */
195#define ELF_LINK_HASH_MARK 04000
7843f00e
ILT
196 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
197 not currently set by all the backends. */
198#define ELF_LINK_NON_GOT_REF 010000
1b1fe8fe
L
199 /* Symbol has a definition in a shared object. */
200#define ELF_LINK_DYNAMIC_DEF 020000
201 /* Symbol is weak in all shared objects. */
202#define ELF_LINK_DYNAMIC_WEAK 040000
c6585bbb
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203 /* Symbol is referenced with a relocation where C/C++ pointer equality
204 matters. */
205#define ELF_LINK_POINTER_EQUALITY_NEEDED 0100000
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206};
207
586119b3
AM
208/* Will references to this symbol always reference the symbol
209 in this object? STV_PROTECTED is excluded from the visibility test
210 here so that function pointer comparisons work properly. Since
211 function symbols not defined in an app are set to their .plt entry,
212 it's necessary for shared libs to also reference the .plt even
213 though the symbol is really local to the shared lib. */
986a241f 214#define SYMBOL_REFERENCES_LOCAL(INFO, H) \
f6c52c13 215 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
586119b3
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216
217/* Will _calls_ to this symbol always call the version in this object? */
986a241f 218#define SYMBOL_CALLS_LOCAL(INFO, H) \
f6c52c13 219 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
586119b3 220
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AO
221/* Common symbols that are turned into definitions don't have the
222 DEF_REGULAR flag set, so they might appear to be undefined. */
223#define ELF_COMMON_DEF_P(H) \
224 (((H)->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 \
225 && ((H)->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 \
226 && (H)->root.type == bfd_link_hash_defined)
227
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228/* Records local symbols to be emitted in the dynamic symbol table. */
229
230struct elf_link_local_dynamic_entry
231{
232 struct elf_link_local_dynamic_entry *next;
233
234 /* The input bfd this symbol came from. */
235 bfd *input_bfd;
236
237 /* The index of the local symbol being copied. */
238 long input_indx;
239
240 /* The index in the outgoing dynamic symbol table. */
241 long dynindx;
3e932841 242
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243 /* A copy of the input symbol. */
244 Elf_Internal_Sym isym;
245};
246
f5d44ba0
AM
247struct elf_link_loaded_list
248{
249 struct elf_link_loaded_list *next;
250 bfd *abfd;
251};
252
126495ed
AM
253/* Structures used by the eh_frame optimization code. */
254struct cie_header
255{
256 unsigned int length;
257 unsigned int id;
258};
259
260struct cie
261{
262 struct cie_header hdr;
263 unsigned char version;
264 unsigned char augmentation[20];
265 unsigned int code_align;
266 int data_align;
267 unsigned int ra_column;
268 unsigned int augmentation_size;
269 struct elf_link_hash_entry *personality;
270 unsigned char per_encoding;
271 unsigned char lsda_encoding;
272 unsigned char fde_encoding;
273 unsigned char initial_insn_length;
274 unsigned char make_relative;
275 unsigned char make_lsda_relative;
276 unsigned char initial_instructions[50];
277};
278
279struct eh_cie_fde
280{
281 unsigned int offset;
282 unsigned int size;
283 asection *sec;
284 unsigned int new_offset;
285 unsigned char fde_encoding;
286 unsigned char lsda_encoding;
287 unsigned char lsda_offset;
822392ce
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288 unsigned int cie : 1;
289 unsigned int removed : 1;
290 unsigned int make_relative : 1;
291 unsigned int make_lsda_relative : 1;
292 unsigned int per_encoding_relative : 1;
126495ed
AM
293};
294
295struct eh_frame_sec_info
296{
297 unsigned int count;
298 unsigned int alloced;
299 struct eh_cie_fde entry[1];
300};
301
302struct eh_frame_array_ent
303{
304 bfd_vma initial_loc;
305 bfd_vma fde;
306};
307
308struct eh_frame_hdr_info
309{
310 struct cie last_cie;
311 asection *last_cie_sec;
312 asection *hdr_sec;
313 unsigned int last_cie_offset;
314 unsigned int fde_count, array_count;
315 struct eh_frame_array_ent *array;
316 /* TRUE if .eh_frame_hdr should contain the sorted search table.
317 We build it if we successfully read all .eh_frame input sections
318 and recognize them. */
b34976b6 319 bfd_boolean table;
126495ed
AM
320};
321
252b5132
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322/* ELF linker hash table. */
323
324struct elf_link_hash_table
325{
326 struct bfd_link_hash_table root;
51b64d56 327
252b5132
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328 /* Whether we have created the special dynamic sections required
329 when linking against or generating a shared object. */
b34976b6 330 bfd_boolean dynamic_sections_created;
51b64d56 331
252b5132
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332 /* The BFD used to hold special sections created by the linker.
333 This will be the first BFD found which requires these sections to
334 be created. */
335 bfd *dynobj;
51b64d56
AM
336
337 /* The value to use when initialising got.refcount/offset and
338 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
5cab59f6
AM
339 the values are refcounts. Set to init_offset in
340 size_dynamic_sections when the values may be offsets. */
341 union gotplt_union init_refcount;
342
343 /* The value to use for got.refcount/offset and plt.refcount/offset
344 when the values may be offsets. Normally (bfd_vma) -1. */
345 union gotplt_union init_offset;
51b64d56 346
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347 /* The number of symbols found in the link which must be put into
348 the .dynsym section. */
349 bfd_size_type dynsymcount;
51b64d56 350
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351 /* The string table of dynamic symbols, which becomes the .dynstr
352 section. */
2b0f7ef9 353 struct elf_strtab_hash *dynstr;
51b64d56 354
252b5132
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355 /* The number of buckets in the hash table in the .hash section.
356 This is based on the number of dynamic symbols. */
357 bfd_size_type bucketcount;
51b64d56 358
252b5132
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359 /* A linked list of DT_NEEDED names found in dynamic objects
360 included in the link. */
361 struct bfd_link_needed_list *needed;
51b64d56 362
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363 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
364 struct elf_link_hash_entry *hgot;
51b64d56 365
f5fa8ca2 366 /* A pointer to information used to merge SEC_MERGE sections. */
c39a58e6 367 void *merge_info;
51b64d56 368
3722b82f
AM
369 /* Used to link stabs in sections. */
370 struct stab_info stab_info;
371
126495ed
AM
372 /* Used by eh_frame code when editing .eh_frame. */
373 struct eh_frame_hdr_info eh_info;
374
30b30c21
RH
375 /* A linked list of local symbols to be added to .dynsym. */
376 struct elf_link_local_dynamic_entry *dynlocal;
51b64d56 377
a963dc6a
L
378 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
379 objects included in the link. */
380 struct bfd_link_needed_list *runpath;
13ae64f3 381
e1918d23
AM
382 /* Cached first output tls section and size of PT_TLS segment. */
383 asection *tls_sec;
384 bfd_size_type tls_size;
f5d44ba0
AM
385
386 /* A linked list of BFD's loaded in the link. */
387 struct elf_link_loaded_list *loaded;
252b5132
RH
388};
389
390/* Look up an entry in an ELF linker hash table. */
391
392#define elf_link_hash_lookup(table, string, create, copy, follow) \
393 ((struct elf_link_hash_entry *) \
394 bfd_link_hash_lookup (&(table)->root, (string), (create), \
395 (copy), (follow)))
396
397/* Traverse an ELF linker hash table. */
398
399#define elf_link_hash_traverse(table, func, info) \
400 (bfd_link_hash_traverse \
401 (&(table)->root, \
c39a58e6 402 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
252b5132
RH
403 (info)))
404
405/* Get the ELF linker hash table from a link_info structure. */
406
407#define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
8ea2e4bd 408
b34976b6 409/* Returns TRUE if the hash table is a struct elf_link_hash_table. */
0eddce27
AM
410#define is_elf_hash_table(htab) \
411 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
ec338859
AM
412
413/* Used by bfd_section_from_r_symndx to cache a small number of local
414 symbol to section mappings. */
415#define LOCAL_SYM_CACHE_SIZE 32
416struct sym_sec_cache
417{
418 bfd *abfd;
419 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
420 asection *sec[LOCAL_SYM_CACHE_SIZE];
421};
252b5132
RH
422\f
423/* Constant information held for an ELF backend. */
424
425struct elf_size_info {
426 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
427 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
428
c7ac6ff8
MM
429 /* The size of entries in the .hash section. */
430 unsigned char sizeof_hash_entry;
431
432 /* The number of internal relocations to allocate per external
433 relocation entry. */
434 unsigned char int_rels_per_ext_rel;
947216bf
AM
435 /* We use some fixed size arrays. This should be large enough to
436 handle all back-ends. */
437#define MAX_INT_RELS_PER_EXT_REL 3
c7ac6ff8 438
45d6a902 439 unsigned char arch_size, log_file_align;
252b5132 440 unsigned char elfclass, ev_current;
dc810e39 441 int (*write_out_phdrs)
c39a58e6
AM
442 (bfd *, const Elf_Internal_Phdr *, unsigned int);
443 bfd_boolean
444 (*write_shdrs_and_ehdr) (bfd *);
dc810e39 445 void (*write_relocs)
c39a58e6 446 (bfd *, asection *, void *);
73ff0d56 447 void (*swap_symbol_in)
c39a58e6 448 (bfd *, const void *, const void *, Elf_Internal_Sym *);
dc810e39 449 void (*swap_symbol_out)
c39a58e6 450 (bfd *, const Elf_Internal_Sym *, void *, void *);
b34976b6 451 bfd_boolean (*slurp_reloc_table)
c39a58e6 452 (bfd *, asection *, asymbol **, bfd_boolean);
dc810e39 453 long (*slurp_symbol_table)
c39a58e6 454 (bfd *, asymbol **, bfd_boolean);
dc810e39 455 void (*swap_dyn_in)
c39a58e6 456 (bfd *, const void *, Elf_Internal_Dyn *);
dc810e39 457 void (*swap_dyn_out)
c39a58e6 458 (bfd *, const Elf_Internal_Dyn *, void *);
c7ac6ff8 459
947216bf
AM
460 /* This function is called to swap in a REL relocation. If an
461 external relocation corresponds to more than one internal
462 relocation, then all relocations are swapped in at once. */
c7ac6ff8 463 void (*swap_reloc_in)
c39a58e6 464 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
c7ac6ff8 465
947216bf 466 /* This function is called to swap out a REL relocation. */
c7ac6ff8 467 void (*swap_reloc_out)
c39a58e6 468 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
c7ac6ff8 469
947216bf
AM
470 /* This function is called to swap in a RELA relocation. If an
471 external relocation corresponds to more than one internal
472 relocation, then all relocations are swapped in at once. */
c7ac6ff8 473 void (*swap_reloca_in)
c39a58e6 474 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
c7ac6ff8 475
947216bf 476 /* This function is called to swap out a RELA relocation. */
c7ac6ff8 477 void (*swap_reloca_out)
c39a58e6 478 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
252b5132
RH
479};
480
481#define elf_symbol_from(ABFD,S) \
482 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
483 && (S)->the_bfd->tdata.elf_obj_data != 0) \
484 ? (elf_symbol_type *) (S) \
485 : 0)
486
db6751f2
JJ
487enum elf_reloc_type_class {
488 reloc_class_normal,
489 reloc_class_relative,
490 reloc_class_plt,
491 reloc_class_copy
492};
493
73d074b4
DJ
494struct elf_reloc_cookie
495{
496 Elf_Internal_Rela *rels, *rel, *relend;
6cdc0ccc 497 Elf_Internal_Sym *locsyms;
73d074b4
DJ
498 bfd *abfd;
499 size_t locsymcount;
500 size_t extsymoff;
501 struct elf_link_hash_entry **sym_hashes;
140f6c8e 502 int r_sym_shift;
b34976b6 503 bfd_boolean bad_symtab;
73d074b4
DJ
504};
505
c6e90b02
TS
506/* The level of IRIX compatibility we're striving for. */
507
508typedef enum {
509 ict_none,
510 ict_irix5,
511 ict_irix6
512} irix_compat_t;
513
2f89ff8d
L
514/* Mapping of ELF section names and types. */
515struct bfd_elf_special_section
516{
517 const char *prefix;
7dcb9820
AM
518 int prefix_length;
519 /* 0 means name must match PREFIX exactly.
520 -1 means name must start with PREFIX followed by an arbitrary string.
521 -2 means name must match PREFIX exactly or consist of PREFIX followed
522 by a dot then anything.
523 > 0 means name must start with the first PREFIX_LENGTH chars of
524 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
525 int suffix_length;
2f89ff8d 526 int type;
7dcb9820 527 int attr;
2f89ff8d
L
528};
529
252b5132
RH
530struct elf_backend_data
531{
252b5132
RH
532 /* The architecture for this backend. */
533 enum bfd_architecture arch;
534
535 /* The ELF machine code (EM_xxxx) for this backend. */
536 int elf_machine_code;
537
538 /* The maximum page size for this backend. */
539 bfd_vma maxpagesize;
540
252b5132
RH
541 /* A function to translate an ELF RELA relocation to a BFD arelent
542 structure. */
dc810e39 543 void (*elf_info_to_howto)
c39a58e6 544 (bfd *, arelent *, Elf_Internal_Rela *);
252b5132
RH
545
546 /* A function to translate an ELF REL relocation to a BFD arelent
547 structure. */
dc810e39 548 void (*elf_info_to_howto_rel)
c39a58e6 549 (bfd *, arelent *, Elf_Internal_Rela *);
252b5132
RH
550
551 /* A function to determine whether a symbol is global when
552 partitioning the symbol table into local and global symbols.
553 This should be NULL for most targets, in which case the correct
554 thing will be done. MIPS ELF, at least on the Irix 5, has
555 special requirements. */
b34976b6 556 bfd_boolean (*elf_backend_sym_is_global)
c39a58e6 557 (bfd *, asymbol *);
252b5132
RH
558
559 /* The remaining functions are hooks which are called only if they
560 are not NULL. */
561
562 /* A function to permit a backend specific check on whether a
563 particular BFD format is relevant for an object file, and to
564 permit the backend to set any global information it wishes. When
565 this is called elf_elfheader is set, but anything else should be
b34976b6 566 used with caution. If this returns FALSE, the check_format
252b5132 567 routine will return a bfd_error_wrong_format error. */
b34976b6 568 bfd_boolean (*elf_backend_object_p)
c39a58e6 569 (bfd *);
252b5132
RH
570
571 /* A function to do additional symbol processing when reading the
572 ELF symbol table. This is where any processor-specific special
573 section indices are handled. */
dc810e39 574 void (*elf_backend_symbol_processing)
c39a58e6 575 (bfd *, asymbol *);
252b5132
RH
576
577 /* A function to do additional symbol processing after reading the
578 entire ELF symbol table. */
b34976b6 579 bfd_boolean (*elf_backend_symbol_table_processing)
c39a58e6 580 (bfd *, elf_symbol_type *, unsigned int);
252b5132
RH
581
582 /* A function to set the type of the info field. Processor-specific
3e932841 583 types should be handled here. */
dc810e39 584 int (*elf_backend_get_symbol_type)
c39a58e6 585 (Elf_Internal_Sym *, int);
60bcf0fa 586
174fd7f9
RS
587 /* Return true if local section symbols should have a non-null st_name.
588 NULL implies false. */
589 bfd_boolean (*elf_backend_name_local_section_symbols)
590 (bfd *);
591
252b5132
RH
592 /* A function to do additional processing on the ELF section header
593 just before writing it out. This is used to set the flags and
594 type fields for some sections, or to actually write out data for
595 unusual sections. */
b34976b6 596 bfd_boolean (*elf_backend_section_processing)
c39a58e6 597 (bfd *, Elf_Internal_Shdr *);
252b5132
RH
598
599 /* A function to handle unusual section types when creating BFD
600 sections from ELF sections. */
b34976b6 601 bfd_boolean (*elf_backend_section_from_shdr)
c39a58e6 602 (bfd *, Elf_Internal_Shdr *, const char *);
252b5132 603
fa152c49
JW
604 /* A function to convert machine dependent section header flags to
605 BFD internal section header flags. */
b34976b6 606 bfd_boolean (*elf_backend_section_flags)
1829f4b2 607 (flagword *, const Elf_Internal_Shdr *);
fa152c49 608
20cfcaae 609 /* A function to handle unusual program segment types when creating BFD
3e932841 610 sections from ELF program segments. */
b34976b6 611 bfd_boolean (*elf_backend_section_from_phdr)
c39a58e6 612 (bfd *, Elf_Internal_Phdr *, int);
20cfcaae 613
252b5132
RH
614 /* A function to set up the ELF section header for a BFD section in
615 preparation for writing it out. This is where the flags and type
616 fields are set for unusual sections. */
b34976b6 617 bfd_boolean (*elf_backend_fake_sections)
c39a58e6 618 (bfd *, Elf_Internal_Shdr *, asection *);
252b5132
RH
619
620 /* A function to get the ELF section index for a BFD section. If
b34976b6 621 this returns TRUE, the section was found. If it is a normal ELF
252b5132
RH
622 section, *RETVAL should be left unchanged. If it is not a normal
623 ELF section *RETVAL should be set to the SHN_xxxx index. */
b34976b6 624 bfd_boolean (*elf_backend_section_from_bfd_section)
c39a58e6 625 (bfd *, asection *, int *retval);
252b5132
RH
626
627 /* If this field is not NULL, it is called by the add_symbols phase
628 of a link just before adding a symbol to the global linker hash
629 table. It may modify any of the fields as it wishes. If *NAME
630 is set to NULL, the symbol will be skipped rather than being
631 added to the hash table. This function is responsible for
632 handling all processor dependent symbol bindings and section
633 indices, and must set at least *FLAGS and *SEC for each processor
634 dependent case; failure to do so will cause a link error. */
b34976b6 635 bfd_boolean (*elf_add_symbol_hook)
555cd476 636 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
c39a58e6 637 const char **name, flagword *flags, asection **sec, bfd_vma *value);
252b5132
RH
638
639 /* If this field is not NULL, it is called by the elf_link_output_sym
640 phase of a link for each symbol which will appear in the object file. */
b34976b6 641 bfd_boolean (*elf_backend_link_output_symbol_hook)
754021d0
AM
642 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
643 asection *, struct elf_link_hash_entry *);
252b5132
RH
644
645 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
646 linker the first time it encounters a dynamic object in the link.
647 This function must create any sections required for dynamic
648 linking. The ABFD argument is a dynamic object. The .interp,
649 .dynamic, .dynsym, .dynstr, and .hash functions have already been
650 created, and this function may modify the section flags if
651 desired. This function will normally create the .got and .plt
652 sections, but different backends have different requirements. */
b34976b6 653 bfd_boolean (*elf_backend_create_dynamic_sections)
c39a58e6 654 (bfd *abfd, struct bfd_link_info *info);
252b5132 655
aee6f5b4
AO
656 /* When creating a shared library, determine whether to omit the
657 dynamic symbol for the section. */
658 bfd_boolean (*elf_backend_omit_section_dynsym)
659 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
660
252b5132
RH
661 /* The CHECK_RELOCS function is called by the add_symbols phase of
662 the ELF backend linker. It is called once for each section with
663 relocs of an object file, just after the symbols for the object
664 file have been added to the global linker hash table. The
665 function must look through the relocs and do any special handling
666 required. This generally means allocating space in the global
667 offset table, and perhaps allocating space for a reloc. The
668 relocs are always passed as Rela structures; if the section
669 actually uses Rel structures, the r_addend field will always be
670 zero. */
b34976b6 671 bfd_boolean (*check_relocs)
c39a58e6
AM
672 (bfd *abfd, struct bfd_link_info *info, asection *o,
673 const Elf_Internal_Rela *relocs);
252b5132 674
85fbca6a
NC
675 /* The CHECK_DIRECTIVES function is called once per input file by
676 the add_symbols phase of the ELF backend linker. The function
677 must inspect the bfd and create any additional symbols according
678 to any custom directives in the bfd. */
679 bfd_boolean (*check_directives)
680 (bfd *abfd, struct bfd_link_info *info);
681
252b5132
RH
682 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
683 linker for every symbol which is defined by a dynamic object and
684 referenced by a regular object. This is called after all the
685 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
686 function has been called. The hash table entry should be
687 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
688 defined in a section from a dynamic object. Dynamic object
689 sections are not included in the final link, and this function is
690 responsible for changing the value to something which the rest of
691 the link can deal with. This will normally involve adding an
692 entry to the .plt or .got or some such section, and setting the
693 symbol to point to that. */
b34976b6 694 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
c39a58e6 695 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
252b5132
RH
696
697 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
698 after all the linker input files have been seen but before the
699 section sizes have been set. This is called after
700 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
b34976b6 701 bfd_boolean (*elf_backend_always_size_sections)
c39a58e6 702 (bfd *output_bfd, struct bfd_link_info *info);
252b5132
RH
703
704 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
705 linker after all the linker input files have been seen but before
706 the sections sizes have been set. This is called after
707 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
708 It is only called when linking against a dynamic object. It must
709 set the sizes of the dynamic sections, and may fill in their
710 contents as well. The generic ELF linker can handle the .dynsym,
711 .dynstr and .hash sections. This function must handle the
712 .interp section and any sections created by the
713 CREATE_DYNAMIC_SECTIONS entry point. */
b34976b6 714 bfd_boolean (*elf_backend_size_dynamic_sections)
c39a58e6 715 (bfd *output_bfd, struct bfd_link_info *info);
252b5132
RH
716
717 /* The RELOCATE_SECTION function is called by the ELF backend linker
718 to handle the relocations for a section.
719
720 The relocs are always passed as Rela structures; if the section
721 actually uses Rel structures, the r_addend field will always be
722 zero.
723
724 This function is responsible for adjust the section contents as
725 necessary, and (if using Rela relocs and generating a
1049f94e 726 relocatable output file) adjusting the reloc addend as
252b5132
RH
727 necessary.
728
729 This function does not have to worry about setting the reloc
730 address or the reloc symbol index.
731
732 LOCAL_SYMS is a pointer to the swapped in local symbols.
733
734 LOCAL_SECTIONS is an array giving the section in the input file
735 corresponding to the st_shndx field of each local symbol.
736
737 The global hash table entry for the global symbols can be found
738 via elf_sym_hashes (input_bfd).
739
1049f94e 740 When generating relocatable output, this function must handle
252b5132
RH
741 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
742 going to be the section symbol corresponding to the output
743 section, which means that the addend must be adjusted
744 accordingly. */
b34976b6 745 bfd_boolean (*elf_backend_relocate_section)
c39a58e6
AM
746 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
747 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
748 Elf_Internal_Sym *local_syms, asection **local_sections);
252b5132
RH
749
750 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
751 linker just before it writes a symbol out to the .dynsym section.
752 The processor backend may make any required adjustment to the
753 symbol. It may also take the opportunity to set contents of the
754 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
755 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
756 on those symbols which are defined by a dynamic object. */
b34976b6 757 bfd_boolean (*elf_backend_finish_dynamic_symbol)
c39a58e6
AM
758 (bfd *output_bfd, struct bfd_link_info *info,
759 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
252b5132
RH
760
761 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
762 linker just before it writes all the dynamic sections out to the
763 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
764 all dynamic symbols. */
b34976b6 765 bfd_boolean (*elf_backend_finish_dynamic_sections)
c39a58e6 766 (bfd *output_bfd, struct bfd_link_info *info);
252b5132
RH
767
768 /* A function to do any beginning processing needed for the ELF file
769 before building the ELF headers and computing file positions. */
770 void (*elf_backend_begin_write_processing)
c39a58e6 771 (bfd *, struct bfd_link_info *);
252b5132
RH
772
773 /* A function to do any final processing needed for the ELF file
b34976b6 774 before writing it out. The LINKER argument is TRUE if this BFD
252b5132
RH
775 was created by the ELF backend linker. */
776 void (*elf_backend_final_write_processing)
c39a58e6 777 (bfd *, bfd_boolean linker);
252b5132
RH
778
779 /* This function is called by get_program_header_size. It should
780 return the number of additional program segments which this BFD
781 will need. It should return -1 on error. */
dc810e39 782 int (*elf_backend_additional_program_headers)
c39a58e6 783 (bfd *);
252b5132
RH
784
785 /* This function is called to modify an existing segment map in a
786 backend specific fashion. */
b34976b6 787 bfd_boolean (*elf_backend_modify_segment_map)
c84fca4d 788 (bfd *, struct bfd_link_info *);
252b5132
RH
789
790 /* This function is called during section gc to discover the section a
1e2f5b6e 791 particular relocation refers to. */
252b5132 792 asection * (*gc_mark_hook)
c39a58e6
AM
793 (asection *sec, struct bfd_link_info *, Elf_Internal_Rela *,
794 struct elf_link_hash_entry *h, Elf_Internal_Sym *);
252b5132
RH
795
796 /* This function, if defined, is called during the sweep phase of gc
797 in order that a backend might update any data structures it might
798 be maintaining. */
b34976b6 799 bfd_boolean (*gc_sweep_hook)
c39a58e6
AM
800 (bfd *abfd, struct bfd_link_info *info, asection *o,
801 const Elf_Internal_Rela *relocs);
252b5132 802
e6c51ed4
NC
803 /* This function, if defined, is called after the ELF headers have
804 been created. This allows for things like the OS and ABI versions
805 to be changed. */
806 void (*elf_backend_post_process_headers)
c39a58e6 807 (bfd *, struct bfd_link_info *);
e6c51ed4 808
587ff49e
RH
809 /* This function, if defined, prints a symbol to file and returns the
810 name of the symbol to be printed. It should return NULL to fall
811 back to default symbol printing. */
812 const char *(*elf_backend_print_symbol_all)
c39a58e6 813 (bfd *, void *, asymbol *);
587ff49e
RH
814
815 /* This function, if defined, is called after all local symbols and
4cc11e76 816 global symbols converted to locals are emitted into the symtab
587ff49e
RH
817 section. It allows the backend to emit special global symbols
818 not handled in the hash table. */
b34976b6 819 bfd_boolean (*elf_backend_output_arch_syms)
c39a58e6 820 (bfd *, struct bfd_link_info *, void *,
754021d0
AM
821 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
822 struct elf_link_hash_entry *));
587ff49e 823
d4c88bbb 824 /* Copy any information related to dynamic linking from a pre-existing
0a991dfe
AM
825 symbol to a newly created symbol. Also called to copy flags and
826 other back-end info to a weakdef, in which case the symbol is not
827 newly created and plt/got refcounts and dynamic indices should not
828 be copied. */
c61b8717 829 void (*elf_backend_copy_indirect_symbol)
9c5bfbb7 830 (const struct elf_backend_data *, struct elf_link_hash_entry *,
c39a58e6 831 struct elf_link_hash_entry *);
c61b8717
RH
832
833 /* Modify any information related to dynamic linking such that the
834 symbol is not exported. */
835 void (*elf_backend_hide_symbol)
c39a58e6 836 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
c61b8717 837
9bf7216d
KK
838 /* Merge the backend specific symbol attribute. */
839 void (*elf_backend_merge_symbol_attribute)
840 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
841 bfd_boolean);
842
9317eacc
CM
843 /* Emit relocations. Overrides default routine for emitting relocs,
844 except during a relocatable link, or if all relocs are being emitted. */
b34976b6 845 bfd_boolean (*elf_backend_emit_relocs)
c39a58e6 846 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *);
9317eacc
CM
847
848 /* Count relocations. Not called for relocatable links
849 or if all relocs are being preserved in the output. */
850 unsigned int (*elf_backend_count_relocs)
c39a58e6 851 (asection *, Elf_Internal_Rela *);
9317eacc 852
bb0082d6
AM
853 /* This function, if defined, is called when an NT_PRSTATUS note is found
854 in a core file. */
b34976b6 855 bfd_boolean (*elf_backend_grok_prstatus)
c39a58e6 856 (bfd *, Elf_Internal_Note *);
bb0082d6
AM
857
858 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
859 note is found in a core file. */
b34976b6 860 bfd_boolean (*elf_backend_grok_psinfo)
c39a58e6 861 (bfd *, Elf_Internal_Note *);
bb0082d6 862
db6751f2 863 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
dc810e39 864 void (* elf_backend_sprintf_vma)
c39a58e6 865 (bfd *, char *, bfd_vma);
dc810e39 866 void (* elf_backend_fprintf_vma)
c39a58e6 867 (bfd *, void *, bfd_vma);
4e771d61 868
db6751f2 869 /* This function returns class of a reloc type. */
f51e552e 870 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
c39a58e6 871 (const Elf_Internal_Rela *);
db6751f2 872
73d074b4
DJ
873 /* This function, if defined, removes information about discarded functions
874 from other sections which mention them. */
b34976b6 875 bfd_boolean (*elf_backend_discard_info)
c39a58e6 876 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
73d074b4
DJ
877
878 /* This function, if defined, signals that the function above has removed
879 the discarded relocations for this section. */
b34976b6 880 bfd_boolean (*elf_backend_ignore_discarded_relocs)
c39a58e6 881 (asection *);
73d074b4 882
ec3391e7
AO
883 /* These functions tell elf-eh-frame whether to attempt to turn
884 absolute or lsda encodings into pc-relative ones. The default
885 definition enables these transformations. */
886 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
887 (bfd *, struct bfd_link_info *, asection *);
888 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
889 (bfd *, struct bfd_link_info *, asection *);
890
891 /* This function returns an encoding after computing the encoded
892 value (and storing it in ENCODED) for the given OFFSET into OSEC,
893 to be stored in at LOC_OFFSET into the LOC_SEC input section.
894 The default definition chooses a 32-bit PC-relative encoding. */
895 bfd_byte (*elf_backend_encode_eh_address)
896 (bfd *abfd, struct bfd_link_info *info,
897 asection *osec, bfd_vma offset,
898 asection *loc_sec, bfd_vma loc_offset,
899 bfd_vma *encoded);
900
73d074b4 901 /* This function, if defined, may write out the given section.
b34976b6
AM
902 Returns TRUE if it did so and FALSE if the caller should. */
903 bfd_boolean (*elf_backend_write_section)
c39a58e6 904 (bfd *, asection *, bfd_byte *);
73d074b4 905
c6e90b02
TS
906 /* The level of IRIX compatibility we're striving for.
907 MIPS ELF specific function. */
908 irix_compat_t (*elf_backend_mips_irix_compat)
c39a58e6 909 (bfd *);
c6e90b02
TS
910
911 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
c39a58e6 912 (unsigned int, bfd_boolean);
c6e90b02 913
252b5132
RH
914 /* The swapping table to use when dealing with ECOFF information.
915 Used for the MIPS ELF .mdebug section. */
916 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
917
8d6337fe
RM
918 /* This function implements `bfd_elf_bfd_from_remote_memory';
919 see elf.c, elfcode.h. */
920 bfd *(*elf_backend_bfd_from_remote_memory)
c39a58e6
AM
921 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
922 int (*target_read_memory) (bfd_vma vma, char *myaddr, int len));
8d6337fe 923
4c45e5c9
JJ
924 /* This function is used by `_bfd_elf_get_synthetic_symtab';
925 see elf.c. */
926 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
927
928 /* Name of the PLT relocation section. */
929 const char *relplt_name;
930
252b5132
RH
931 /* Alternate EM_xxxx machine codes for this backend. */
932 int elf_machine_alt1;
933 int elf_machine_alt2;
934
935 const struct elf_size_info *s;
936
2f89ff8d
L
937 /* An array of target specific special section map. */
938 const struct bfd_elf_special_section *special_sections;
939
252b5132
RH
940 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
941 .got section */
942 bfd_vma got_symbol_offset;
943
6f2f2c9d
DJ
944 /* The size in bytes of the header for the GOT. This includes the
945 so-called reserved entries on some systems. */
252b5132 946 bfd_vma got_header_size;
252b5132 947
b34976b6
AM
948 /* This is TRUE if the linker should act like collect and gather
949 global constructors and destructors by name. This is TRUE for
86dc0f79
RH
950 MIPS ELF because the Irix 5 tools can not handle the .init
951 section. */
952 unsigned collect : 1;
953
b34976b6
AM
954 /* This is TRUE if the linker should ignore changes to the type of a
955 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
86dc0f79
RH
956 record undefined functions as STT_OBJECT although the definitions
957 are STT_FUNC. */
958 unsigned type_change_ok : 1;
959
bf572ba0
MM
960 /* Whether the backend may use REL relocations. (Some backends use
961 both REL and RELA relocations, and this flag is set for those
962 backends.) */
963 unsigned may_use_rel_p : 1;
60bcf0fa 964
bf572ba0
MM
965 /* Whether the backend may use RELA relocations. (Some backends use
966 both REL and RELA relocations, and this flag is set for those
967 backends.) */
968 unsigned may_use_rela_p : 1;
969
970 /* Whether the default relocation type is RELA. If a backend with
971 this flag set wants REL relocations for a particular section,
972 it must note that explicitly. Similarly, if this flag is clear,
60bcf0fa
NC
973 and the backend wants RELA relocations for a particular
974 section. */
bf572ba0
MM
975 unsigned default_use_rela_p : 1;
976
b491616a
AM
977 /* Set if RELA relocations for a relocatable link can be handled by
978 generic code. Backends that set this flag need do nothing in the
979 backend relocate_section routine for relocatable linking. */
980 unsigned rela_normal : 1;
981
b34976b6 982 /* TRUE if addresses "naturally" sign extend. This is used when
86dc0f79
RH
983 swapping in from Elf32 when BFD64. */
984 unsigned sign_extend_vma : 1;
985
252b5132
RH
986 unsigned want_got_plt : 1;
987 unsigned plt_readonly : 1;
988 unsigned want_plt_sym : 1;
989 unsigned plt_not_loaded : 1;
990 unsigned plt_alignment : 4;
991 unsigned can_gc_sections : 1;
51b64d56 992 unsigned can_refcount : 1;
2517a57f 993 unsigned want_got_sym : 1;
3018b441 994 unsigned want_dynbss : 1;
5e8d7549
NC
995 /* Targets which do not support physical addressing often require
996 that the p_paddr field in the section header to be set to zero.
997 This field indicates whether this behavior is required. */
998 unsigned want_p_paddr_set_to_zero : 1;
252b5132
RH
999};
1000
1001/* Information stored for each BFD section in an ELF file. This
1002 structure is allocated by elf_new_section_hook. */
1003
1004struct bfd_elf_section_data
1005{
1006 /* The ELF header for this section. */
1007 Elf_Internal_Shdr this_hdr;
0c715baa 1008
252b5132
RH
1009 /* The ELF header for the reloc section associated with this
1010 section, if any. */
1011 Elf_Internal_Shdr rel_hdr;
0c715baa 1012
252b5132
RH
1013 /* If there is a second reloc section associated with this section,
1014 as can happen on Irix 6, this field points to the header. */
1015 Elf_Internal_Shdr *rel_hdr2;
0c715baa 1016
23bc299b
MM
1017 /* The number of relocations currently assigned to REL_HDR. */
1018 unsigned int rel_count;
0c715baa 1019
23bc299b
MM
1020 /* The number of relocations currently assigned to REL_HDR2. */
1021 unsigned int rel_count2;
0c715baa 1022
252b5132
RH
1023 /* The ELF section number of this section. Only used for an output
1024 file. */
1025 int this_idx;
0c715baa 1026
23bc299b
MM
1027 /* The ELF section number of the reloc section indicated by
1028 REL_HDR if any. Only used for an output file. */
252b5132 1029 int rel_idx;
0c715baa 1030
23bc299b
MM
1031 /* The ELF section number of the reloc section indicated by
1032 REL_HDR2 if any. Only used for an output file. */
1033 int rel_idx2;
0c715baa 1034
f0abc2a1
AM
1035 /* Used by the backend linker when generating a shared library to
1036 record the dynamic symbol index for a section symbol
1037 corresponding to this section. A value of 0 means that there is
1038 no dynamic symbol for this section. */
1039 int dynindx;
1040
38ce5b11
L
1041 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1042 asection *linked_to;
1043
252b5132
RH
1044 /* Used by the backend linker to store the symbol hash table entries
1045 associated with relocs against global symbols. */
1046 struct elf_link_hash_entry **rel_hashes;
0c715baa 1047
252b5132
RH
1048 /* A pointer to the swapped relocs. If the section uses REL relocs,
1049 rather than RELA, all the r_addend fields will be zero. This
1050 pointer may be NULL. It is used by the backend linker. */
1051 Elf_Internal_Rela *relocs;
0c715baa 1052
f0abc2a1
AM
1053 /* A pointer to a linked list tracking dynamic relocs copied for
1054 local symbols. */
c39a58e6 1055 void *local_dynrel;
0c715baa 1056
f0abc2a1
AM
1057 /* A pointer to the bfd section used for dynamic relocs. */
1058 asection *sreloc;
0c715baa 1059
1126897b
AM
1060 union {
1061 /* Group name, if this section is a member of a group. */
1062 const char *name;
1063
1064 /* Group signature sym, if this is the SHT_GROUP section. */
fc0a2244 1065 struct bfd_symbol *id;
1126897b 1066 } group;
dbb410c3 1067
3d7f7666
L
1068 /* Optional information about section group; NULL if it doesn't
1069 belongs to any section group. */
1070 asection *sec_group;
1071
dbb410c3
AM
1072 /* A linked list of sections in the group. Circular when used by
1073 the linker. */
1074 asection *next_in_group;
1075
f0abc2a1 1076 /* A pointer used for various section optimizations. */
c39a58e6 1077 void *sec_info;
252b5132
RH
1078};
1079
1080#define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
38ce5b11 1081#define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
2f89ff8d
L
1082#define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1083#define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1126897b
AM
1084#define elf_group_name(sec) (elf_section_data(sec)->group.name)
1085#define elf_group_id(sec) (elf_section_data(sec)->group.id)
945906ff 1086#define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
3d7f7666 1087#define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
252b5132 1088
b34976b6 1089/* Return TRUE if section has been discarded. */
68bfbfcc
AM
1090#define elf_discarded_section(sec) \
1091 (!bfd_is_abs_section (sec) \
1092 && bfd_is_abs_section ((sec)->output_section) \
cdd3575c
AM
1093 && (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
1094 && (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
ed4de5e2 1095
252b5132 1096#define get_elf_backend_data(abfd) \
9c5bfbb7 1097 ((const struct elf_backend_data *) (abfd)->xvec->backend_data)
252b5132 1098
45d6a902
AM
1099/* This struct is used to pass information to routines called via
1100 elf_link_hash_traverse which must return failure. */
1101
1102struct elf_info_failed
1103{
1104 bfd_boolean failed;
1105 struct bfd_link_info *info;
1106 struct bfd_elf_version_tree *verdefs;
1107};
1108
1109/* This structure is used to pass information to
1110 _bfd_elf_link_assign_sym_version. */
1111
1112struct elf_assign_sym_version_info
1113{
1114 /* Output BFD. */
1115 bfd *output_bfd;
1116 /* General link information. */
1117 struct bfd_link_info *info;
1118 /* Version tree. */
1119 struct bfd_elf_version_tree *verdefs;
1120 /* Whether we had a failure. */
1121 bfd_boolean failed;
1122};
1123
1124/* This structure is used to pass information to
1125 _bfd_elf_link_find_version_dependencies. */
1126
1127struct elf_find_verdep_info
1128{
1129 /* Output BFD. */
1130 bfd *output_bfd;
1131 /* General link information. */
1132 struct bfd_link_info *info;
1133 /* The number of dependencies. */
1134 unsigned int vers;
1135 /* Whether we had a failure. */
1136 bfd_boolean failed;
1137};
1138
252b5132
RH
1139/* Some private data is stashed away for future use using the tdata pointer
1140 in the bfd structure. */
1141
1142struct elf_obj_tdata
1143{
1144 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1145 Elf_Internal_Shdr **elf_sect_ptr;
1146 Elf_Internal_Phdr *phdr;
1147 struct elf_segment_map *segment_map;
2b0f7ef9 1148 struct elf_strtab_hash *strtab_ptr;
252b5132
RH
1149 int num_locals;
1150 int num_globals;
9ad5cbcf 1151 unsigned int num_elf_sections; /* elf_sect_ptr size */
4e89ac30 1152 int num_section_syms;
252b5132
RH
1153 asymbol **section_syms; /* STT_SECTION symbols for each section */
1154 Elf_Internal_Shdr symtab_hdr;
1155 Elf_Internal_Shdr shstrtab_hdr;
1156 Elf_Internal_Shdr strtab_hdr;
1157 Elf_Internal_Shdr dynsymtab_hdr;
1158 Elf_Internal_Shdr dynstrtab_hdr;
1159 Elf_Internal_Shdr dynversym_hdr;
1160 Elf_Internal_Shdr dynverref_hdr;
1161 Elf_Internal_Shdr dynverdef_hdr;
9ad5cbcf 1162 Elf_Internal_Shdr symtab_shndx_hdr;
252b5132
RH
1163 unsigned int symtab_section, shstrtab_section;
1164 unsigned int strtab_section, dynsymtab_section;
9ad5cbcf 1165 unsigned int symtab_shndx_section;
252b5132
RH
1166 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1167 file_ptr next_file_pos;
dbb410c3
AM
1168 bfd_vma gp; /* The gp value */
1169 unsigned int gp_size; /* The gp size */
1170
3e932841 1171 /* Information grabbed from an elf core file. */
252b5132
RH
1172 int core_signal;
1173 int core_pid;
1174 int core_lwpid;
1175 char* core_program;
1176 char* core_command;
1177
252b5132
RH
1178 /* A mapping from external symbols to entries in the linker hash
1179 table, used when linking. This is indexed by the symbol index
1180 minus the sh_info field of the symbol table header. */
1181 struct elf_link_hash_entry **sym_hashes;
1182
5cab59f6
AM
1183 /* Track usage and final offsets of GOT entries for local symbols.
1184 This array is indexed by symbol index. Elements are used
1185 identically to "got" in struct elf_link_hash_entry. */
252b5132
RH
1186 union
1187 {
1188 bfd_signed_vma *refcounts;
1189 bfd_vma *offsets;
5cab59f6 1190 struct got_entry **ents;
252b5132
RH
1191 } local_got;
1192
252b5132
RH
1193 /* The linker ELF emulation code needs to let the backend ELF linker
1194 know what filename should be used for a dynamic object if the
1195 dynamic object is found using a search. The emulation code then
1196 sometimes needs to know what name was actually used. Until the
1197 file has been added to the linker symbol table, this field holds
1198 the name the linker wants. After it has been added, it holds the
1199 name actually used, which will be the DT_SONAME entry if there is
1200 one. */
1201 const char *dt_name;
1202
252b5132
RH
1203 /* Records the result of `get_program_header_size'. */
1204 bfd_size_type program_header_size;
1205
1206 /* Used by find_nearest_line entry point. */
c39a58e6 1207 void *line_info;
252b5132
RH
1208
1209 /* Used by MIPS ELF find_nearest_line entry point. The structure
1210 could be included directly in this one, but there's no point to
1211 wasting the memory just for the infrequently called
1212 find_nearest_line. */
1213 struct mips_elf_find_line *find_line_info;
1214
3e932841 1215 /* A place to stash dwarf1 info for this bfd. */
252b5132
RH
1216 struct dwarf1_debug *dwarf1_find_line_info;
1217
3e932841 1218 /* A place to stash dwarf2 info for this bfd. */
c39a58e6 1219 void *dwarf2_find_line_info;
252b5132
RH
1220
1221 /* An array of stub sections indexed by symbol number, used by the
1222 MIPS ELF linker. FIXME: We should figure out some way to only
1223 include this field for a MIPS ELF target. */
1224 asection **local_stubs;
1225
65765700
JJ
1226 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1227 created. */
126495ed
AM
1228 asection *eh_frame_hdr;
1229
4a43e768
AM
1230 Elf_Internal_Shdr **group_sect_ptr;
1231 int num_group;
65765700 1232
252b5132
RH
1233 /* Number of symbol version definitions we are about to emit. */
1234 unsigned int cverdefs;
1235
1236 /* Number of symbol version references we are about to emit. */
1237 unsigned int cverrefs;
1238
9ee5e499
JJ
1239 /* Segment flags for the PT_GNU_STACK segment. */
1240 unsigned int stack_flags;
1241
8c37241b
JJ
1242 /* Should the PT_GNU_RELRO segment be emitted? */
1243 bfd_boolean relro;
1244
252b5132
RH
1245 /* Symbol version definitions in external objects. */
1246 Elf_Internal_Verdef *verdef;
1247
1248 /* Symbol version references to external objects. */
1249 Elf_Internal_Verneed *verref;
1250
b305ef96
UC
1251 /* The Irix 5 support uses two virtual sections, which represent
1252 text/data symbols defined in dynamic objects. */
1253 asymbol *elf_data_symbol;
1254 asymbol *elf_text_symbol;
1255 asection *elf_data_section;
1256 asection *elf_text_section;
4a43e768
AM
1257
1258 /* Whether a dyanmic object was specified normally on the linker
1259 command line, or was specified when --as-needed was in effect,
1260 or was found via a DT_NEEDED entry. */
1261 enum dynamic_lib_link_class dyn_lib_class;
1262
1263 /* This is set to TRUE if the object was created by the backend
1264 linker. */
1265 bfd_boolean linker;
1266
1267 /* Irix 5 often screws up the symbol table, sorting local symbols
1268 after global symbols. This flag is set if the symbol table in
1269 this BFD appears to be screwed up. If it is, we ignore the
1270 sh_info field in the symbol table header, and always read all the
1271 symbols. */
1272 bfd_boolean bad_symtab;
1273
1274 /* Used to determine if the e_flags field has been initialized */
1275 bfd_boolean flags_init;
252b5132
RH
1276};
1277
1278#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1279#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1280#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
9ad5cbcf 1281#define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
252b5132
RH
1282#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1283#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
9ad5cbcf 1284#define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
252b5132
RH
1285#define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1286#define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1287#define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1288#define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1289#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1290#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1291#define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
4e89ac30 1292#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
252b5132
RH
1293#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1294#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1295#define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1296#define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1297#define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1298#define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1299#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
5cab59f6 1300#define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
252b5132 1301#define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
4a43e768 1302#define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
252b5132
RH
1303#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1304#define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
252b5132
RH
1305\f
1306extern void _bfd_elf_swap_verdef_in
c39a58e6 1307 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
252b5132 1308extern void _bfd_elf_swap_verdef_out
c39a58e6 1309 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
252b5132 1310extern void _bfd_elf_swap_verdaux_in
c39a58e6 1311 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
252b5132 1312extern void _bfd_elf_swap_verdaux_out
c39a58e6 1313 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
252b5132 1314extern void _bfd_elf_swap_verneed_in
c39a58e6 1315 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
252b5132 1316extern void _bfd_elf_swap_verneed_out
c39a58e6 1317 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
252b5132 1318extern void _bfd_elf_swap_vernaux_in
c39a58e6 1319 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
252b5132 1320extern void _bfd_elf_swap_vernaux_out
c39a58e6 1321 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
252b5132 1322extern void _bfd_elf_swap_versym_in
c39a58e6 1323 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
252b5132 1324extern void _bfd_elf_swap_versym_out
c39a58e6 1325 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
252b5132 1326
dc810e39 1327extern int _bfd_elf_section_from_bfd_section
c39a58e6 1328 (bfd *, asection *);
252b5132 1329extern char *bfd_elf_string_from_elf_section
c39a58e6 1330 (bfd *, unsigned, unsigned);
dc810e39 1331extern char *bfd_elf_get_str_section
c39a58e6 1332 (bfd *, unsigned);
6cdc0ccc 1333extern Elf_Internal_Sym *bfd_elf_get_elf_syms
c39a58e6
AM
1334 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1335 Elf_External_Sym_Shndx *);
5cab59f6 1336extern const char *bfd_elf_local_sym_name
c39a58e6 1337 (bfd *, Elf_Internal_Sym *);
252b5132 1338
b34976b6 1339extern bfd_boolean _bfd_elf_copy_private_bfd_data
c39a58e6 1340 (bfd *, bfd *);
b34976b6 1341extern bfd_boolean _bfd_elf_print_private_bfd_data
c39a58e6 1342 (bfd *, void *);
dc810e39 1343extern void bfd_elf_print_symbol
c39a58e6 1344 (bfd *, void *, asymbol *, bfd_print_symbol_type);
dc810e39
AM
1345
1346#define elf_string_from_elf_strtab(abfd, strindex) \
c39a58e6
AM
1347 bfd_elf_string_from_elf_section (abfd, elf_elfheader(abfd)->e_shstrndx, \
1348 strindex)
252b5132 1349
dc810e39 1350extern void _bfd_elf_sprintf_vma
c39a58e6 1351 (bfd *, char *, bfd_vma);
dc810e39 1352extern void _bfd_elf_fprintf_vma
c39a58e6 1353 (bfd *, void *, bfd_vma);
d69bb69b 1354
ec3391e7
AO
1355extern bfd_byte _bfd_elf_encode_eh_address
1356 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1357 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1358extern bfd_boolean _bfd_elf_can_make_relative
1359 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1360
dc810e39 1361extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
c39a58e6 1362 (const Elf_Internal_Rela *);
f8df10f4 1363extern bfd_vma _bfd_elf_rela_local_sym
8517fae7 1364 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
c629eae0 1365extern bfd_vma _bfd_elf_rel_local_sym
c39a58e6 1366 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
c629eae0 1367extern bfd_vma _bfd_elf_section_offset
c39a58e6 1368 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
db6751f2 1369
dc810e39 1370extern unsigned long bfd_elf_hash
c39a58e6 1371 (const char *);
252b5132 1372
dc810e39 1373extern bfd_reloc_status_type bfd_elf_generic_reloc
c39a58e6 1374 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
b34976b6 1375extern bfd_boolean bfd_elf_mkobject
c39a58e6 1376 (bfd *);
b34976b6 1377extern bfd_boolean bfd_elf_mkcorefile
c39a58e6 1378 (bfd *);
dc810e39 1379extern Elf_Internal_Shdr *bfd_elf_find_section
c39a58e6 1380 (bfd *, char *);
b34976b6 1381extern bfd_boolean _bfd_elf_make_section_from_shdr
c39a58e6 1382 (bfd *, Elf_Internal_Shdr *, const char *);
b34976b6 1383extern bfd_boolean _bfd_elf_make_section_from_phdr
c39a58e6 1384 (bfd *, Elf_Internal_Phdr *, int, const char *);
252b5132 1385extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
c39a58e6 1386 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
252b5132 1387extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
c39a58e6 1388 (bfd *);
c61b8717 1389extern void _bfd_elf_link_hash_copy_indirect
9c5bfbb7 1390 (const struct elf_backend_data *, struct elf_link_hash_entry *,
c39a58e6 1391 struct elf_link_hash_entry *);
c61b8717 1392extern void _bfd_elf_link_hash_hide_symbol
c39a58e6 1393 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
b34976b6 1394extern bfd_boolean _bfd_elf_link_hash_table_init
c39a58e6
AM
1395 (struct elf_link_hash_table *, bfd *,
1396 struct bfd_hash_entry *(*)
1397 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
b34976b6 1398extern bfd_boolean _bfd_elf_slurp_version_tables
c39a58e6 1399 (bfd *);
b34976b6 1400extern bfd_boolean _bfd_elf_merge_sections
c39a58e6 1401 (bfd *, struct bfd_link_info *);
72adc230
AM
1402extern bfd_boolean bfd_elf_is_group_section
1403 (bfd *, const struct bfd_section *);
b34976b6 1404extern bfd_boolean bfd_elf_discard_group
198beae2 1405 (bfd *, struct bfd_section *);
082b7297
L
1406extern void _bfd_elf_section_already_linked
1407 (bfd *, struct bfd_section *);
1126897b 1408extern void bfd_elf_set_group_contents
c39a58e6 1409 (bfd *, asection *, void *);
2d653fc7 1410extern void _bfd_elf_link_just_syms
c39a58e6 1411 (asection *, struct bfd_link_info *);
80fccad2
BW
1412extern bfd_boolean _bfd_elf_copy_private_header_data
1413 (bfd *, bfd *);
b34976b6 1414extern bfd_boolean _bfd_elf_copy_private_symbol_data
c39a58e6 1415 (bfd *, asymbol *, bfd *, asymbol *);
b34976b6 1416extern bfd_boolean _bfd_elf_copy_private_section_data
c39a58e6 1417 (bfd *, asection *, bfd *, asection *);
b34976b6 1418extern bfd_boolean _bfd_elf_write_object_contents
c39a58e6 1419 (bfd *);
b34976b6 1420extern bfd_boolean _bfd_elf_write_corefile_contents
c39a58e6 1421 (bfd *);
b34976b6 1422extern bfd_boolean _bfd_elf_set_section_contents
0f867abe 1423 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
dc810e39 1424extern long _bfd_elf_get_symtab_upper_bound
c39a58e6 1425 (bfd *);
6cee3f79 1426extern long _bfd_elf_canonicalize_symtab
c39a58e6 1427 (bfd *, asymbol **);
dc810e39 1428extern long _bfd_elf_get_dynamic_symtab_upper_bound
c39a58e6 1429 (bfd *);
dc810e39 1430extern long _bfd_elf_canonicalize_dynamic_symtab
c39a58e6 1431 (bfd *, asymbol **);
4c45e5c9
JJ
1432extern long _bfd_elf_get_synthetic_symtab
1433 (bfd *, asymbol **, asymbol **);
dc810e39 1434extern long _bfd_elf_get_reloc_upper_bound
c39a58e6 1435 (bfd *, sec_ptr);
dc810e39 1436extern long _bfd_elf_canonicalize_reloc
c39a58e6 1437 (bfd *, sec_ptr, arelent **, asymbol **);
dc810e39 1438extern long _bfd_elf_get_dynamic_reloc_upper_bound
c39a58e6 1439 (bfd *);
dc810e39 1440extern long _bfd_elf_canonicalize_dynamic_reloc
c39a58e6 1441 (bfd *, arelent **, asymbol **);
dc810e39 1442extern asymbol *_bfd_elf_make_empty_symbol
c39a58e6 1443 (bfd *);
dc810e39 1444extern void _bfd_elf_get_symbol_info
c39a58e6 1445 (bfd *, asymbol *, symbol_info *);
b34976b6 1446extern bfd_boolean _bfd_elf_is_local_label_name
c39a58e6 1447 (bfd *, const char *);
dc810e39 1448extern alent *_bfd_elf_get_lineno
c39a58e6 1449 (bfd *, asymbol *);
b34976b6 1450extern bfd_boolean _bfd_elf_set_arch_mach
c39a58e6 1451 (bfd *, enum bfd_architecture, unsigned long);
b34976b6 1452extern bfd_boolean _bfd_elf_find_nearest_line
c39a58e6
AM
1453 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1454 unsigned int *);
252b5132
RH
1455#define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1456#define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
dc810e39 1457extern int _bfd_elf_sizeof_headers
c39a58e6 1458 (bfd *, bfd_boolean);
b34976b6 1459extern bfd_boolean _bfd_elf_new_section_hook
c39a58e6 1460 (bfd *, asection *);
b34976b6 1461extern bfd_boolean _bfd_elf_init_reloc_shdr
c39a58e6 1462 (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean);
7dcb9820
AM
1463extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1464 (bfd *, const char *);
252b5132
RH
1465
1466/* If the target doesn't have reloc handling written yet: */
dc810e39 1467extern void _bfd_elf_no_info_to_howto
c39a58e6 1468 (bfd *, arelent *, Elf_Internal_Rela *);
dc810e39 1469
b34976b6 1470extern bfd_boolean bfd_section_from_shdr
c39a58e6 1471 (bfd *, unsigned int shindex);
b34976b6 1472extern bfd_boolean bfd_section_from_phdr
c39a58e6 1473 (bfd *, Elf_Internal_Phdr *, int);
dc810e39
AM
1474
1475extern int _bfd_elf_symbol_from_bfd_symbol
c39a58e6 1476 (bfd *, asymbol **);
dc810e39 1477
ec338859 1478extern asection *bfd_section_from_r_symndx
c39a58e6 1479 (bfd *, struct sym_sec_cache *, asection *, unsigned long);
dc810e39 1480extern asection *bfd_section_from_elf_index
c39a58e6 1481 (bfd *, unsigned int);
dc810e39 1482extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
c39a58e6 1483 (void);
2b0f7ef9
JJ
1484
1485extern struct elf_strtab_hash * _bfd_elf_strtab_init
c39a58e6 1486 (void);
2b0f7ef9 1487extern void _bfd_elf_strtab_free
c39a58e6 1488 (struct elf_strtab_hash *);
2b0f7ef9 1489extern bfd_size_type _bfd_elf_strtab_add
c39a58e6 1490 (struct elf_strtab_hash *, const char *, bfd_boolean);
2b0f7ef9 1491extern void _bfd_elf_strtab_addref
c39a58e6 1492 (struct elf_strtab_hash *, bfd_size_type);
2b0f7ef9 1493extern void _bfd_elf_strtab_delref
c39a58e6 1494 (struct elf_strtab_hash *, bfd_size_type);
2b0f7ef9 1495extern void _bfd_elf_strtab_clear_all_refs
c39a58e6 1496 (struct elf_strtab_hash *);
2b0f7ef9 1497extern bfd_size_type _bfd_elf_strtab_size
c39a58e6 1498 (struct elf_strtab_hash *);
2b0f7ef9 1499extern bfd_size_type _bfd_elf_strtab_offset
c39a58e6 1500 (struct elf_strtab_hash *, bfd_size_type);
b34976b6 1501extern bfd_boolean _bfd_elf_strtab_emit
c39a58e6 1502 (bfd *, struct elf_strtab_hash *);
2b0f7ef9 1503extern void _bfd_elf_strtab_finalize
c39a58e6 1504 (struct elf_strtab_hash *);
2b0f7ef9 1505
b34976b6 1506extern bfd_boolean _bfd_elf_discard_section_eh_frame
c39a58e6
AM
1507 (bfd *, struct bfd_link_info *, asection *,
1508 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
b34976b6 1509extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
c39a58e6 1510 (bfd *, struct bfd_link_info *);
65765700 1511extern bfd_vma _bfd_elf_eh_frame_section_offset
c39a58e6 1512 (bfd *, asection *, bfd_vma);
b34976b6 1513extern bfd_boolean _bfd_elf_write_section_eh_frame
c39a58e6 1514 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
b34976b6 1515extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
c39a58e6 1516 (bfd *, struct bfd_link_info *);
b34976b6 1517extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
c39a58e6 1518 (struct bfd_link_info *);
65765700 1519
45d6a902 1520extern bfd_boolean _bfd_elf_merge_symbol
c39a58e6
AM
1521 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1522 asection **, bfd_vma *, struct elf_link_hash_entry **, bfd_boolean *,
0f8a2703 1523 bfd_boolean *, bfd_boolean *, bfd_boolean *);
45d6a902
AM
1524
1525extern bfd_boolean _bfd_elf_add_default_symbol
c39a58e6
AM
1526 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
1527 const char *, Elf_Internal_Sym *, asection **, bfd_vma *,
0f8a2703 1528 bfd_boolean *, bfd_boolean);
45d6a902
AM
1529
1530extern bfd_boolean _bfd_elf_export_symbol
c39a58e6 1531 (struct elf_link_hash_entry *, void *);
45d6a902
AM
1532
1533extern bfd_boolean _bfd_elf_link_find_version_dependencies
c39a58e6 1534 (struct elf_link_hash_entry *, void *);
45d6a902
AM
1535
1536extern bfd_boolean _bfd_elf_link_assign_sym_version
c39a58e6 1537 (struct elf_link_hash_entry *, void *);
45d6a902 1538
dc810e39 1539extern long _bfd_elf_link_lookup_local_dynindx
c39a58e6 1540 (struct bfd_link_info *, bfd *, long);
b34976b6 1541extern bfd_boolean _bfd_elf_compute_section_file_positions
c39a58e6 1542 (bfd *, struct bfd_link_info *);
dc810e39 1543extern void _bfd_elf_assign_file_positions_for_relocs
c39a58e6 1544 (bfd *);
dc810e39 1545extern file_ptr _bfd_elf_assign_file_position_for_section
c39a58e6 1546 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
dc810e39 1547
b34976b6 1548extern bfd_boolean _bfd_elf_validate_reloc
c39a58e6 1549 (bfd *, arelent *);
dc810e39 1550
45d6a902 1551extern bfd_boolean _bfd_elf_link_create_dynamic_sections
c39a58e6 1552 (bfd *, struct bfd_link_info *);
aee6f5b4
AO
1553extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1554 (bfd *, struct bfd_link_info *, asection *);
b34976b6 1555extern bfd_boolean _bfd_elf_create_dynamic_sections
c39a58e6 1556 (bfd *, struct bfd_link_info *);
b34976b6 1557extern bfd_boolean _bfd_elf_create_got_section
c39a58e6 1558 (bfd *, struct bfd_link_info *);
dc810e39 1559extern unsigned long _bfd_elf_link_renumber_dynsyms
c39a58e6 1560 (bfd *, struct bfd_link_info *);
dc810e39 1561
b34976b6 1562extern bfd_boolean _bfd_elfcore_make_pseudosection
c39a58e6 1563 (bfd *, char *, size_t, ufile_ptr);
dc810e39 1564extern char *_bfd_elfcore_strndup
c39a58e6 1565 (bfd *, char *, size_t);
dc810e39 1566
45d6a902 1567extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
c39a58e6 1568 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
45d6a902
AM
1569
1570extern bfd_boolean _bfd_elf_link_size_reloc_section
c39a58e6 1571 (bfd *, Elf_Internal_Shdr *, asection *);
45d6a902
AM
1572
1573extern bfd_boolean _bfd_elf_link_output_relocs
c39a58e6 1574 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *);
45d6a902
AM
1575
1576extern bfd_boolean _bfd_elf_fix_symbol_flags
c39a58e6 1577 (struct elf_link_hash_entry *, struct elf_info_failed *);
45d6a902
AM
1578
1579extern bfd_boolean _bfd_elf_adjust_dynamic_symbol
c39a58e6 1580 (struct elf_link_hash_entry *, void *);
45d6a902
AM
1581
1582extern bfd_boolean _bfd_elf_link_sec_merge_syms
c39a58e6 1583 (struct elf_link_hash_entry *, void *);
45d6a902 1584
986a241f 1585extern bfd_boolean _bfd_elf_dynamic_symbol_p
c39a58e6 1586 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
f6c52c13
AM
1587
1588extern bfd_boolean _bfd_elf_symbol_refs_local_p
c39a58e6 1589 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
986a241f 1590
3d7f7666
L
1591extern bfd_boolean bfd_elf_match_symbols_in_sections
1592 (asection *sec1, asection *sec2);
1593
1594extern bfd_boolean _bfd_elf_setup_group_pointers
1595 (bfd *);
1596
dc810e39 1597extern const bfd_target *bfd_elf32_object_p
c39a58e6 1598 (bfd *);
dc810e39 1599extern const bfd_target *bfd_elf32_core_file_p
c39a58e6 1600 (bfd *);
dc810e39 1601extern char *bfd_elf32_core_file_failing_command
c39a58e6 1602 (bfd *);
dc810e39 1603extern int bfd_elf32_core_file_failing_signal
c39a58e6 1604 (bfd *);
b34976b6 1605extern bfd_boolean bfd_elf32_core_file_matches_executable_p
c39a58e6 1606 (bfd *, bfd *);
252b5132 1607
252b5132 1608extern void bfd_elf32_swap_symbol_in
c39a58e6 1609 (bfd *, const void *, const void *, Elf_Internal_Sym *);
252b5132 1610extern void bfd_elf32_swap_symbol_out
c39a58e6 1611 (bfd *, const Elf_Internal_Sym *, void *, void *);
252b5132 1612extern void bfd_elf32_swap_reloc_in
c39a58e6 1613 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
252b5132 1614extern void bfd_elf32_swap_reloc_out
c39a58e6 1615 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
252b5132 1616extern void bfd_elf32_swap_reloca_in
c39a58e6 1617 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
252b5132 1618extern void bfd_elf32_swap_reloca_out
c39a58e6 1619 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
252b5132 1620extern void bfd_elf32_swap_phdr_in
c39a58e6 1621 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
252b5132 1622extern void bfd_elf32_swap_phdr_out
c39a58e6 1623 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
252b5132 1624extern void bfd_elf32_swap_dyn_in
c39a58e6 1625 (bfd *, const void *, Elf_Internal_Dyn *);
252b5132 1626extern void bfd_elf32_swap_dyn_out
c39a58e6 1627 (bfd *, const Elf_Internal_Dyn *, void *);
252b5132 1628extern long bfd_elf32_slurp_symbol_table
c39a58e6 1629 (bfd *, asymbol **, bfd_boolean);
b34976b6 1630extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
c39a58e6 1631 (bfd *);
252b5132 1632extern int bfd_elf32_write_out_phdrs
c39a58e6 1633 (bfd *, const Elf_Internal_Phdr *, unsigned int);
b9f66672 1634extern void bfd_elf32_write_relocs
c39a58e6 1635 (bfd *, asection *, void *);
b34976b6 1636extern bfd_boolean bfd_elf32_slurp_reloc_table
c39a58e6 1637 (bfd *, asection *, asymbol **, bfd_boolean);
252b5132 1638
dc810e39 1639extern const bfd_target *bfd_elf64_object_p
c39a58e6 1640 (bfd *);
dc810e39 1641extern const bfd_target *bfd_elf64_core_file_p
c39a58e6 1642 (bfd *);
dc810e39 1643extern char *bfd_elf64_core_file_failing_command
c39a58e6 1644 (bfd *);
dc810e39 1645extern int bfd_elf64_core_file_failing_signal
c39a58e6 1646 (bfd *);
b34976b6 1647extern bfd_boolean bfd_elf64_core_file_matches_executable_p
c39a58e6 1648 (bfd *, bfd *);
252b5132
RH
1649
1650extern void bfd_elf64_swap_symbol_in
c39a58e6 1651 (bfd *, const void *, const void *, Elf_Internal_Sym *);
252b5132 1652extern void bfd_elf64_swap_symbol_out
c39a58e6 1653 (bfd *, const Elf_Internal_Sym *, void *, void *);
252b5132 1654extern void bfd_elf64_swap_reloc_in
c39a58e6 1655 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
252b5132 1656extern void bfd_elf64_swap_reloc_out
c39a58e6 1657 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
252b5132 1658extern void bfd_elf64_swap_reloca_in
c39a58e6 1659 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
252b5132 1660extern void bfd_elf64_swap_reloca_out
c39a58e6 1661 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
252b5132 1662extern void bfd_elf64_swap_phdr_in
c39a58e6 1663 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
252b5132 1664extern void bfd_elf64_swap_phdr_out
c39a58e6 1665 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
252b5132 1666extern void bfd_elf64_swap_dyn_in
c39a58e6 1667 (bfd *, const void *, Elf_Internal_Dyn *);
252b5132 1668extern void bfd_elf64_swap_dyn_out
c39a58e6 1669 (bfd *, const Elf_Internal_Dyn *, void *);
252b5132 1670extern long bfd_elf64_slurp_symbol_table
c39a58e6 1671 (bfd *, asymbol **, bfd_boolean);
b34976b6 1672extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
c39a58e6 1673 (bfd *);
252b5132 1674extern int bfd_elf64_write_out_phdrs
c39a58e6 1675 (bfd *, const Elf_Internal_Phdr *, unsigned int);
b9f66672 1676extern void bfd_elf64_write_relocs
c39a58e6 1677 (bfd *, asection *, void *);
b34976b6 1678extern bfd_boolean bfd_elf64_slurp_reloc_table
c39a58e6 1679 (bfd *, asection *, asymbol **, bfd_boolean);
5a580b3a 1680
4ad4eba5
AM
1681extern bfd_boolean bfd_elf_link_add_symbols
1682 (bfd *, struct bfd_link_info *);
5a580b3a 1683extern bfd_boolean _bfd_elf_add_dynamic_entry
c39a58e6 1684 (struct bfd_link_info *, bfd_vma, bfd_vma);
252b5132 1685
c152c796
AM
1686extern bfd_boolean bfd_elf_link_record_dynamic_symbol
1687 (struct bfd_link_info *, struct elf_link_hash_entry *);
30b30c21 1688
c152c796 1689extern int bfd_elf_link_record_local_dynamic_symbol
c39a58e6 1690 (struct bfd_link_info *, bfd *, long);
252b5132 1691
b34976b6 1692extern bfd_boolean _bfd_elf_close_and_cleanup
c39a58e6 1693 (bfd *);
252b5132 1694extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
fc0a2244 1695 (bfd *, arelent *, struct bfd_symbol *, void *,
c39a58e6 1696 asection *, bfd *, char **);
252b5132 1697
c152c796 1698extern bfd_boolean bfd_elf_final_link
c39a58e6 1699 (bfd *, struct bfd_link_info *);
c152c796
AM
1700
1701extern bfd_boolean bfd_elf_gc_sections
c39a58e6 1702 (bfd *, struct bfd_link_info *);
c152c796
AM
1703
1704extern bfd_boolean bfd_elf_gc_record_vtinherit
c39a58e6 1705 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
c152c796
AM
1706
1707extern bfd_boolean bfd_elf_gc_record_vtentry
c39a58e6 1708 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
252b5132 1709
c152c796 1710extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
c39a58e6 1711 (bfd *, struct bfd_link_info *);
c152c796
AM
1712
1713extern bfd_boolean bfd_elf_gc_common_final_link
c39a58e6 1714 (bfd *, struct bfd_link_info *);
252b5132 1715
c152c796 1716extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
c39a58e6 1717 (bfd_vma, void *);
73d074b4 1718
7c76fa91 1719/* Exported interface for writing elf corefile notes. */
d4c88bbb 1720extern char *elfcore_write_note
c39a58e6 1721 (bfd *, char *, int *, const char *, int, const void *, int);
d4c88bbb 1722extern char *elfcore_write_prpsinfo
c39a58e6 1723 (bfd *, char *, int *, const char *, const char *);
d4c88bbb 1724extern char *elfcore_write_prstatus
c39a58e6 1725 (bfd *, char *, int *, long, int, const void *);
d4c88bbb 1726extern char * elfcore_write_pstatus
c39a58e6 1727 (bfd *, char *, int *, long, int, const void *);
d4c88bbb 1728extern char *elfcore_write_prfpreg
c39a58e6 1729 (bfd *, char *, int *, const void *, int);
d4c88bbb 1730extern char *elfcore_write_prxfpreg
c39a58e6 1731 (bfd *, char *, int *, const void *, int);
d4c88bbb 1732extern char *elfcore_write_lwpstatus
c39a58e6 1733 (bfd *, char *, int *, long, int, const void *);
7c76fa91 1734
8d6337fe 1735extern bfd *_bfd_elf32_bfd_from_remote_memory
c39a58e6
AM
1736 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1737 int (*target_read_memory) (bfd_vma, char *, int));
8d6337fe 1738extern bfd *_bfd_elf64_bfd_from_remote_memory
c39a58e6
AM
1739 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1740 int (*target_read_memory) (bfd_vma, char *, int));
8d6337fe 1741
d4845d57
JR
1742/* SH ELF specific routine. */
1743
b34976b6 1744extern bfd_boolean _sh_elf_set_mach_from_flags
c39a58e6 1745 (bfd *);
d4845d57 1746
c152c796
AM
1747/* This is the condition under which finish_dynamic_symbol will be called.
1748 If our finish_dynamic_symbol isn't called, we'll need to do something
1749 about initializing any .plt and .got entries in relocate_section. */
1750#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1751 ((DYN) \
1752 && ((SHARED) \
1753 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1754 && ((H)->dynindx != -1 \
1755 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1756
560e09e9
NC
1757/* This macro is to avoid lots of duplicated code in the body
1758 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
b2a8e766
AM
1759#define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
1760 r_symndx, symtab_hdr, sym_hashes, \
1761 h, sec, relocation, \
1762 unresolved_reloc, warned) \
1763 do \
1764 { \
1765 /* It seems this can happen with erroneous or unsupported \
1766 input (mixing a.out and elf in an archive, for example.) */ \
1767 if (sym_hashes == NULL) \
1768 return FALSE; \
1769 \
1770 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
1771 \
1772 while (h->root.type == bfd_link_hash_indirect \
1773 || h->root.type == bfd_link_hash_warning) \
1774 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
1775 \
1776 warned = FALSE; \
1777 unresolved_reloc = FALSE; \
1778 relocation = 0; \
1779 if (h->root.type == bfd_link_hash_defined \
1780 || h->root.type == bfd_link_hash_defweak) \
1781 { \
1782 sec = h->root.u.def.section; \
1783 if (sec == NULL \
1784 || sec->output_section == NULL) \
1785 /* Set a flag that will be cleared later if we find a \
1786 relocation value for this symbol. output_section \
1787 is typically NULL for symbols satisfied by a shared \
1788 library. */ \
1789 unresolved_reloc = TRUE; \
1790 else \
1791 relocation = (h->root.u.def.value \
1792 + sec->output_section->vma \
1793 + sec->output_offset); \
1794 } \
1795 else if (h->root.type == bfd_link_hash_undefweak) \
1796 ; \
1797 else if (info->unresolved_syms_in_objects == RM_IGNORE \
1798 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
1799 ; \
1800 else \
1801 { \
5a580b3a
AM
1802 bfd_boolean err; \
1803 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
1804 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
1805 if (!info->callbacks->undefined_symbol (info, \
1806 h->root.root.string, \
1807 input_bfd, \
1808 input_section, \
1809 rel->r_offset, err)) \
b2a8e766
AM
1810 return FALSE; \
1811 warned = TRUE; \
1812 } \
1813 } \
560e09e9
NC
1814 while (0)
1815
252b5132 1816#endif /* _LIBELF_H_ */
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