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