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 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 57typedef struct 58{ 59 /* The BFD symbol. */ 60 asymbol symbol; 61 /* ELF symbol information. */ 62 Elf_Internal_Sym internal_elf_sym; 63 /* Backend specific information. */ 64 union 65 { 66 unsigned int hppa_arg_reloc; 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 79struct elf_strtab_hash; 80struct got_entry; 81struct plt_entry; 82 83/* ELF linker hash table entries. */ 84 85struct elf_link_hash_entry 86{ 87 struct bfd_link_hash_entry root; 88 89 /* Symbol index in output file. This is initialized to -1. It is 90 set to -2 if the symbol is used by a reloc. */ 91 long indx; 92 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 marked during garbage collection. */ 159 unsigned int mark : 1; 160 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is 161 not currently set by all the backends. */ 162 unsigned int non_got_ref : 1; 163 /* Symbol has a definition in a shared object. 164 FIXME: There is no real need for this field if def_dynamic is never 165 cleared and all places that test def_dynamic also test def_regular. */ 166 unsigned int dynamic_def : 1; 167 /* Symbol is weak in all shared objects. */ 168 unsigned int dynamic_weak : 1; 169 /* Symbol is referenced with a relocation where C/C++ pointer equality 170 matters. */ 171 unsigned int pointer_equality_needed : 1; 172 173 /* String table index in .dynstr if this is a dynamic symbol. */ 174 unsigned long dynstr_index; 175 176 union 177 { 178 /* If this is a weak defined symbol from a dynamic object, this 179 field points to a defined symbol with the same value, if there is 180 one. Otherwise it is NULL. */ 181 struct elf_link_hash_entry *weakdef; 182 183 /* Hash value of the name computed using the ELF hash function. 184 Used part way through size_dynamic_sections, after we've finished 185 with weakdefs. */ 186 unsigned long elf_hash_value; 187 } u; 188 189 /* Version information. */ 190 union 191 { 192 /* This field is used for a symbol which is not defined in a 193 regular object. It points to the version information read in 194 from the dynamic object. */ 195 Elf_Internal_Verdef *verdef; 196 /* This field is used for a symbol which is defined in a regular 197 object. It is set up in size_dynamic_sections. It points to 198 the version information we should write out for this symbol. */ 199 struct bfd_elf_version_tree *vertree; 200 } verinfo; 201 202 struct 203 { 204 /* Virtual table entry use information. This array is nominally of size 205 size/sizeof(target_void_pointer), though we have to be able to assume 206 and track a size while the symbol is still undefined. It is indexed 207 via offset/sizeof(target_void_pointer). */ 208 size_t size; 209 bfd_boolean *used; 210 211 /* Virtual table derivation info. */ 212 struct elf_link_hash_entry *parent; 213 } *vtable; 214}; 215 216/* Will references to this symbol always reference the symbol 217 in this object? STV_PROTECTED is excluded from the visibility test 218 here so that function pointer comparisons work properly. Since 219 function symbols not defined in an app are set to their .plt entry, 220 it's necessary for shared libs to also reference the .plt even 221 though the symbol is really local to the shared lib. */ 222#define SYMBOL_REFERENCES_LOCAL(INFO, H) \ 223 _bfd_elf_symbol_refs_local_p (H, INFO, 0) 224 225/* Will _calls_ to this symbol always call the version in this object? */ 226#define SYMBOL_CALLS_LOCAL(INFO, H) \ 227 _bfd_elf_symbol_refs_local_p (H, INFO, 1) 228 229/* Common symbols that are turned into definitions don't have the 230 DEF_REGULAR flag set, so they might appear to be undefined. */ 231#define ELF_COMMON_DEF_P(H) \ 232 (!(H)->def_regular \ 233 && !(H)->def_dynamic \ 234 && (H)->root.type == bfd_link_hash_defined) 235 236/* Records local symbols to be emitted in the dynamic symbol table. */ 237 238struct elf_link_local_dynamic_entry 239{ 240 struct elf_link_local_dynamic_entry *next; 241 242 /* The input bfd this symbol came from. */ 243 bfd *input_bfd; 244 245 /* The index of the local symbol being copied. */ 246 long input_indx; 247 248 /* The index in the outgoing dynamic symbol table. */ 249 long dynindx; 250 251 /* A copy of the input symbol. */ 252 Elf_Internal_Sym isym; 253}; 254 255struct elf_link_loaded_list 256{ 257 struct elf_link_loaded_list *next; 258 bfd *abfd; 259}; 260 261/* Structures used by the eh_frame optimization code. */ 262struct cie_header 263{ 264 unsigned int length; 265 unsigned int id; 266}; 267 268struct cie 269{ 270 struct cie_header hdr; 271 unsigned char version; 272 char augmentation[20]; 273 bfd_vma code_align; 274 bfd_signed_vma data_align; 275 bfd_vma ra_column; 276 bfd_vma augmentation_size; 277 struct elf_link_hash_entry *personality; 278 unsigned char per_encoding; 279 unsigned char lsda_encoding; 280 unsigned char fde_encoding; 281 unsigned char initial_insn_length; 282 unsigned char make_relative; 283 unsigned char make_lsda_relative; 284 unsigned char initial_instructions[50]; 285}; 286 287struct eh_cie_fde 288{ 289 unsigned int offset; 290 unsigned int size; 291 asection *sec; 292 unsigned int new_offset; 293 unsigned char fde_encoding; 294 unsigned char lsda_encoding; 295 unsigned char lsda_offset; 296 unsigned char cie : 1; 297 unsigned char removed : 1; 298 unsigned char make_relative : 1; 299 unsigned char make_lsda_relative : 1; 300 unsigned char per_encoding_relative : 1; 301}; 302 303struct eh_frame_sec_info 304{ 305 unsigned int count; 306 unsigned int alloced; 307 struct eh_cie_fde entry[1]; 308}; 309 310struct eh_frame_array_ent 311{ 312 bfd_vma initial_loc; 313 bfd_vma fde; 314}; 315 316struct eh_frame_hdr_info 317{ 318 struct cie last_cie; 319 asection *last_cie_sec; 320 asection *hdr_sec; 321 unsigned int last_cie_offset; 322 unsigned int fde_count, array_count; 323 struct eh_frame_array_ent *array; 324 /* TRUE if .eh_frame_hdr should contain the sorted search table. 325 We build it if we successfully read all .eh_frame input sections 326 and recognize them. */ 327 bfd_boolean table; 328}; 329 330/* ELF linker hash table. */ 331 332struct elf_link_hash_table 333{ 334 struct bfd_link_hash_table root; 335 336 /* Whether we have created the special dynamic sections required 337 when linking against or generating a shared object. */ 338 bfd_boolean dynamic_sections_created; 339 340 /* The BFD used to hold special sections created by the linker. 341 This will be the first BFD found which requires these sections to 342 be created. */ 343 bfd *dynobj; 344 345 /* The value to use when initialising got.refcount/offset and 346 plt.refcount/offset in an elf_link_hash_entry. Set to zero when 347 the values are refcounts. Set to init_got_offset/init_plt_offset 348 in size_dynamic_sections when the values may be offsets. */ 349 union gotplt_union init_got_refcount; 350 union gotplt_union init_plt_refcount; 351 352 /* The value to use for got.refcount/offset and plt.refcount/offset 353 when the values may be offsets. Normally (bfd_vma) -1. */ 354 union gotplt_union init_got_offset; 355 union gotplt_union init_plt_offset; 356 357 /* The number of symbols found in the link which must be put into 358 the .dynsym section. */ 359 bfd_size_type dynsymcount; 360 361 /* The string table of dynamic symbols, which becomes the .dynstr 362 section. */ 363 struct elf_strtab_hash *dynstr; 364 365 /* The number of buckets in the hash table in the .hash section. 366 This is based on the number of dynamic symbols. */ 367 bfd_size_type bucketcount; 368 369 /* A linked list of DT_NEEDED names found in dynamic objects 370 included in the link. */ 371 struct bfd_link_needed_list *needed; 372 373 /* The _GLOBAL_OFFSET_TABLE_ symbol. */ 374 struct elf_link_hash_entry *hgot; 375 376 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */ 377 struct elf_link_hash_entry *hplt; 378 379 /* A pointer to information used to merge SEC_MERGE sections. */ 380 void *merge_info; 381 382 /* Used to link stabs in sections. */ 383 struct stab_info stab_info; 384 385 /* Used by eh_frame code when editing .eh_frame. */ 386 struct eh_frame_hdr_info eh_info; 387 388 /* A linked list of local symbols to be added to .dynsym. */ 389 struct elf_link_local_dynamic_entry *dynlocal; 390 391 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic 392 objects included in the link. */ 393 struct bfd_link_needed_list *runpath; 394 395 /* Cached first output tls section and size of PT_TLS segment. */ 396 asection *tls_sec; 397 bfd_size_type tls_size; 398 399 /* A linked list of BFD's loaded in the link. */ 400 struct elf_link_loaded_list *loaded; 401 402 /* True if this target has relocatable executables, so needs dynamic 403 section symbols. */ 404 bfd_boolean is_relocatable_executable; 405}; 406 407/* Look up an entry in an ELF linker hash table. */ 408 409#define elf_link_hash_lookup(table, string, create, copy, follow) \ 410 ((struct elf_link_hash_entry *) \ 411 bfd_link_hash_lookup (&(table)->root, (string), (create), \ 412 (copy), (follow))) 413 414/* Traverse an ELF linker hash table. */ 415 416#define elf_link_hash_traverse(table, func, info) \ 417 (bfd_link_hash_traverse \ 418 (&(table)->root, \ 419 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 420 (info))) 421 422/* Get the ELF linker hash table from a link_info structure. */ 423 424#define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) 425 426/* Returns TRUE if the hash table is a struct elf_link_hash_table. */ 427#define is_elf_hash_table(htab) \ 428 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) 429 430/* Used by bfd_section_from_r_symndx to cache a small number of local 431 symbol to section mappings. */ 432#define LOCAL_SYM_CACHE_SIZE 32 433struct sym_sec_cache 434{ 435 bfd *abfd; 436 unsigned long indx[LOCAL_SYM_CACHE_SIZE]; 437 asection *sec[LOCAL_SYM_CACHE_SIZE]; 438}; 439 440/* Constant information held for an ELF backend. */ 441 442struct elf_size_info { 443 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; 444 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; 445 446 /* The size of entries in the .hash section. */ 447 unsigned char sizeof_hash_entry; 448 449 /* The number of internal relocations to allocate per external 450 relocation entry. */ 451 unsigned char int_rels_per_ext_rel; 452 /* We use some fixed size arrays. This should be large enough to 453 handle all back-ends. */ 454#define MAX_INT_RELS_PER_EXT_REL 3 455 456 unsigned char arch_size, log_file_align; 457 unsigned char elfclass, ev_current; 458 int (*write_out_phdrs) 459 (bfd *, const Elf_Internal_Phdr *, unsigned int); 460 bfd_boolean 461 (*write_shdrs_and_ehdr) (bfd *); 462 void (*write_relocs) 463 (bfd *, asection *, void *); 464 void (*swap_symbol_in) 465 (bfd *, const void *, const void *, Elf_Internal_Sym *); 466 void (*swap_symbol_out) 467 (bfd *, const Elf_Internal_Sym *, void *, void *); 468 bfd_boolean (*slurp_reloc_table) 469 (bfd *, asection *, asymbol **, bfd_boolean); 470 long (*slurp_symbol_table) 471 (bfd *, asymbol **, bfd_boolean); 472 void (*swap_dyn_in) 473 (bfd *, const void *, Elf_Internal_Dyn *); 474 void (*swap_dyn_out) 475 (bfd *, const Elf_Internal_Dyn *, void *); 476 477 /* This function is called to swap in a REL relocation. If an 478 external relocation corresponds to more than one internal 479 relocation, then all relocations are swapped in at once. */ 480 void (*swap_reloc_in) 481 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 482 483 /* This function is called to swap out a REL relocation. */ 484 void (*swap_reloc_out) 485 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 486 487 /* This function is called to swap in a RELA relocation. If an 488 external relocation corresponds to more than one internal 489 relocation, then all relocations are swapped in at once. */ 490 void (*swap_reloca_in) 491 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 492 493 /* This function is called to swap out a RELA relocation. */ 494 void (*swap_reloca_out) 495 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 496}; 497 498#define elf_symbol_from(ABFD,S) \ 499 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ 500 && (S)->the_bfd->tdata.elf_obj_data != 0) \ 501 ? (elf_symbol_type *) (S) \ 502 : 0) 503 504enum elf_reloc_type_class { 505 reloc_class_normal, 506 reloc_class_relative, 507 reloc_class_plt, 508 reloc_class_copy 509}; 510 511struct elf_reloc_cookie 512{ 513 Elf_Internal_Rela *rels, *rel, *relend; 514 Elf_Internal_Sym *locsyms; 515 bfd *abfd; 516 size_t locsymcount; 517 size_t extsymoff; 518 struct elf_link_hash_entry **sym_hashes; 519 int r_sym_shift; 520 bfd_boolean bad_symtab; 521}; 522 523/* The level of IRIX compatibility we're striving for. */ 524 525typedef enum { 526 ict_none, 527 ict_irix5, 528 ict_irix6 529} irix_compat_t; 530 531/* Mapping of ELF section names and types. */ 532struct bfd_elf_special_section 533{ 534 const char *prefix; 535 int prefix_length; 536 /* 0 means name must match PREFIX exactly. 537 -1 means name must start with PREFIX followed by an arbitrary string. 538 -2 means name must match PREFIX exactly or consist of PREFIX followed 539 by a dot then anything. 540 > 0 means name must start with the first PREFIX_LENGTH chars of 541 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ 542 int suffix_length; 543 int type; 544 int attr; 545}; 546 547enum action_discarded 548 { 549 COMPLAIN = 1, 550 PRETEND = 2 551 }; 552 553struct elf_backend_data 554{ 555 /* The architecture for this backend. */ 556 enum bfd_architecture arch; 557 558 /* The ELF machine code (EM_xxxx) for this backend. */ 559 int elf_machine_code; 560 561 /* The maximum page size for this backend. */ 562 bfd_vma maxpagesize; 563 564 /* The minimum page size for this backend. An input object will not be 565 considered page aligned unless its sections are correctly aligned for 566 pages at least this large. May be smaller than maxpagesize. */ 567 bfd_vma minpagesize; 568 569 /* The BFD flags applied to sections created for dynamic linking. */ 570 flagword dynamic_sec_flags; 571 572 /* A function to translate an ELF RELA relocation to a BFD arelent 573 structure. */ 574 void (*elf_info_to_howto) 575 (bfd *, arelent *, Elf_Internal_Rela *); 576 577 /* A function to translate an ELF REL relocation to a BFD arelent 578 structure. */ 579 void (*elf_info_to_howto_rel) 580 (bfd *, arelent *, Elf_Internal_Rela *); 581 582 /* A function to determine whether a symbol is global when 583 partitioning the symbol table into local and global symbols. 584 This should be NULL for most targets, in which case the correct 585 thing will be done. MIPS ELF, at least on the Irix 5, has 586 special requirements. */ 587 bfd_boolean (*elf_backend_sym_is_global) 588 (bfd *, asymbol *); 589 590 /* The remaining functions are hooks which are called only if they 591 are not NULL. */ 592 593 /* A function to permit a backend specific check on whether a 594 particular BFD format is relevant for an object file, and to 595 permit the backend to set any global information it wishes. When 596 this is called elf_elfheader is set, but anything else should be 597 used with caution. If this returns FALSE, the check_format 598 routine will return a bfd_error_wrong_format error. */ 599 bfd_boolean (*elf_backend_object_p) 600 (bfd *); 601 602 /* A function to do additional symbol processing when reading the 603 ELF symbol table. This is where any processor-specific special 604 section indices are handled. */ 605 void (*elf_backend_symbol_processing) 606 (bfd *, asymbol *); 607 608 /* A function to do additional symbol processing after reading the 609 entire ELF symbol table. */ 610 bfd_boolean (*elf_backend_symbol_table_processing) 611 (bfd *, elf_symbol_type *, unsigned int); 612 613 /* A function to set the type of the info field. Processor-specific 614 types should be handled here. */ 615 int (*elf_backend_get_symbol_type) 616 (Elf_Internal_Sym *, int); 617 618 /* A function to return the linker hash table entry of a symbol that 619 might be satisfied by an archive symbol. */ 620 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup) 621 (bfd *, struct bfd_link_info *, const char *); 622 623 /* Return true if local section symbols should have a non-null st_name. 624 NULL implies false. */ 625 bfd_boolean (*elf_backend_name_local_section_symbols) 626 (bfd *); 627 628 /* A function to do additional processing on the ELF section header 629 just before writing it out. This is used to set the flags and 630 type fields for some sections, or to actually write out data for 631 unusual sections. */ 632 bfd_boolean (*elf_backend_section_processing) 633 (bfd *, Elf_Internal_Shdr *); 634 635 /* A function to handle unusual section types when creating BFD 636 sections from ELF sections. */ 637 bfd_boolean (*elf_backend_section_from_shdr) 638 (bfd *, Elf_Internal_Shdr *, const char *, int); 639 640 /* A function to convert machine dependent ELF section header flags to 641 BFD internal section header flags. */ 642 bfd_boolean (*elf_backend_section_flags) 643 (flagword *, const Elf_Internal_Shdr *); 644 645 /* A function that returns a struct containing ELF section flags and 646 type for the given BFD section. */ 647 const struct bfd_elf_special_section * (*get_sec_type_attr) 648 (bfd *, asection *); 649 650 /* A function to handle unusual program segment types when creating BFD 651 sections from ELF program segments. */ 652 bfd_boolean (*elf_backend_section_from_phdr) 653 (bfd *, Elf_Internal_Phdr *, int, const char *); 654 655 /* A function to set up the ELF section header for a BFD section in 656 preparation for writing it out. This is where the flags and type 657 fields are set for unusual sections. */ 658 bfd_boolean (*elf_backend_fake_sections) 659 (bfd *, Elf_Internal_Shdr *, asection *); 660 661 /* A function to get the ELF section index for a BFD section. If 662 this returns TRUE, the section was found. If it is a normal ELF 663 section, *RETVAL should be left unchanged. If it is not a normal 664 ELF section *RETVAL should be set to the SHN_xxxx index. */ 665 bfd_boolean (*elf_backend_section_from_bfd_section) 666 (bfd *, asection *, int *retval); 667 668 /* If this field is not NULL, it is called by the add_symbols phase 669 of a link just before adding a symbol to the global linker hash 670 table. It may modify any of the fields as it wishes. If *NAME 671 is set to NULL, the symbol will be skipped rather than being 672 added to the hash table. This function is responsible for 673 handling all processor dependent symbol bindings and section 674 indices, and must set at least *FLAGS and *SEC for each processor 675 dependent case; failure to do so will cause a link error. */ 676 bfd_boolean (*elf_add_symbol_hook) 677 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *, 678 const char **name, flagword *flags, asection **sec, bfd_vma *value); 679 680 /* If this field is not NULL, it is called by the elf_link_output_sym 681 phase of a link for each symbol which will appear in the object file. */ 682 bfd_boolean (*elf_backend_link_output_symbol_hook) 683 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *, 684 asection *, struct elf_link_hash_entry *); 685 686 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend 687 linker the first time it encounters a dynamic object in the link. 688 This function must create any sections required for dynamic 689 linking. The ABFD argument is a dynamic object. The .interp, 690 .dynamic, .dynsym, .dynstr, and .hash functions have already been 691 created, and this function may modify the section flags if 692 desired. This function will normally create the .got and .plt 693 sections, but different backends have different requirements. */ 694 bfd_boolean (*elf_backend_create_dynamic_sections) 695 (bfd *abfd, struct bfd_link_info *info); 696 697 /* When creating a shared library, determine whether to omit the 698 dynamic symbol for the section. */ 699 bfd_boolean (*elf_backend_omit_section_dynsym) 700 (bfd *output_bfd, struct bfd_link_info *info, asection *osec); 701 702 /* The CHECK_RELOCS function is called by the add_symbols phase of 703 the ELF backend linker. It is called once for each section with 704 relocs of an object file, just after the symbols for the object 705 file have been added to the global linker hash table. The 706 function must look through the relocs and do any special handling 707 required. This generally means allocating space in the global 708 offset table, and perhaps allocating space for a reloc. The 709 relocs are always passed as Rela structures; if the section 710 actually uses Rel structures, the r_addend field will always be 711 zero. */ 712 bfd_boolean (*check_relocs) 713 (bfd *abfd, struct bfd_link_info *info, asection *o, 714 const Elf_Internal_Rela *relocs); 715 716 /* The CHECK_DIRECTIVES function is called once per input file by 717 the add_symbols phase of the ELF backend linker. The function 718 must inspect the bfd and create any additional symbols according 719 to any custom directives in the bfd. */ 720 bfd_boolean (*check_directives) 721 (bfd *abfd, struct bfd_link_info *info); 722 723 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend 724 linker for every symbol which is defined by a dynamic object and 725 referenced by a regular object. This is called after all the 726 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS 727 function has been called. The hash table entry should be 728 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be 729 defined in a section from a dynamic object. Dynamic object 730 sections are not included in the final link, and this function is 731 responsible for changing the value to something which the rest of 732 the link can deal with. This will normally involve adding an 733 entry to the .plt or .got or some such section, and setting the 734 symbol to point to that. */ 735 bfd_boolean (*elf_backend_adjust_dynamic_symbol) 736 (struct bfd_link_info *info, struct elf_link_hash_entry *h); 737 738 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker 739 after all the linker input files have been seen but before the 740 section sizes have been set. This is called after 741 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */ 742 bfd_boolean (*elf_backend_always_size_sections) 743 (bfd *output_bfd, struct bfd_link_info *info); 744 745 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend 746 linker after all the linker input files have been seen but before 747 the sections sizes have been set. This is called after 748 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols. 749 It is only called when linking against a dynamic object. It must 750 set the sizes of the dynamic sections, and may fill in their 751 contents as well. The generic ELF linker can handle the .dynsym, 752 .dynstr and .hash sections. This function must handle the 753 .interp section and any sections created by the 754 CREATE_DYNAMIC_SECTIONS entry point. */ 755 bfd_boolean (*elf_backend_size_dynamic_sections) 756 (bfd *output_bfd, struct bfd_link_info *info); 757 758 /* The RELOCATE_SECTION function is called by the ELF backend linker 759 to handle the relocations for a section. 760 761 The relocs are always passed as Rela structures; if the section 762 actually uses Rel structures, the r_addend field will always be 763 zero. 764 765 This function is responsible for adjust the section contents as 766 necessary, and (if using Rela relocs and generating a 767 relocatable output file) adjusting the reloc addend as 768 necessary. 769 770 This function does not have to worry about setting the reloc 771 address or the reloc symbol index. 772 773 LOCAL_SYMS is a pointer to the swapped in local symbols. 774 775 LOCAL_SECTIONS is an array giving the section in the input file 776 corresponding to the st_shndx field of each local symbol. 777 778 The global hash table entry for the global symbols can be found 779 via elf_sym_hashes (input_bfd). 780 781 When generating relocatable output, this function must handle 782 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 783 going to be the section symbol corresponding to the output 784 section, which means that the addend must be adjusted 785 accordingly. */ 786 bfd_boolean (*elf_backend_relocate_section) 787 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd, 788 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs, 789 Elf_Internal_Sym *local_syms, asection **local_sections); 790 791 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend 792 linker just before it writes a symbol out to the .dynsym section. 793 The processor backend may make any required adjustment to the 794 symbol. It may also take the opportunity to set contents of the 795 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on 796 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called 797 on those symbols which are defined by a dynamic object. */ 798 bfd_boolean (*elf_backend_finish_dynamic_symbol) 799 (bfd *output_bfd, struct bfd_link_info *info, 800 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym); 801 802 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend 803 linker just before it writes all the dynamic sections out to the 804 output file. The FINISH_DYNAMIC_SYMBOL will have been called on 805 all dynamic symbols. */ 806 bfd_boolean (*elf_backend_finish_dynamic_sections) 807 (bfd *output_bfd, struct bfd_link_info *info); 808 809 /* A function to do any beginning processing needed for the ELF file 810 before building the ELF headers and computing file positions. */ 811 void (*elf_backend_begin_write_processing) 812 (bfd *, struct bfd_link_info *); 813 814 /* A function to do any final processing needed for the ELF file 815 before writing it out. The LINKER argument is TRUE if this BFD 816 was created by the ELF backend linker. */ 817 void (*elf_backend_final_write_processing) 818 (bfd *, bfd_boolean linker); 819 820 /* This function is called by get_program_header_size. It should 821 return the number of additional program segments which this BFD 822 will need. It should return -1 on error. */ 823 int (*elf_backend_additional_program_headers) 824 (bfd *); 825 826 /* This function is called to modify an existing segment map in a 827 backend specific fashion. */ 828 bfd_boolean (*elf_backend_modify_segment_map) 829 (bfd *, struct bfd_link_info *); 830 831 /* This function is called during section garbage collection to 832 mark sections that define global symbols. */ 833 bfd_boolean (*gc_mark_dynamic_ref) 834 (struct elf_link_hash_entry *h, void *inf); 835 836 /* This function is called during section gc to discover the section a 837 particular relocation refers to. */ 838 asection * (*gc_mark_hook) 839 (asection *sec, struct bfd_link_info *, Elf_Internal_Rela *, 840 struct elf_link_hash_entry *h, Elf_Internal_Sym *); 841 842 /* This function, if defined, is called during the sweep phase of gc 843 in order that a backend might update any data structures it might 844 be maintaining. */ 845 bfd_boolean (*gc_sweep_hook) 846 (bfd *abfd, struct bfd_link_info *info, asection *o, 847 const Elf_Internal_Rela *relocs); 848 849 /* This function, if defined, is called after the ELF headers have 850 been created. This allows for things like the OS and ABI versions 851 to be changed. */ 852 void (*elf_backend_post_process_headers) 853 (bfd *, struct bfd_link_info *); 854 855 /* This function, if defined, prints a symbol to file and returns the 856 name of the symbol to be printed. It should return NULL to fall 857 back to default symbol printing. */ 858 const char *(*elf_backend_print_symbol_all) 859 (bfd *, void *, asymbol *); 860 861 /* This function, if defined, is called after all local symbols and 862 global symbols converted to locals are emitted into the symtab 863 section. It allows the backend to emit special global symbols 864 not handled in the hash table. */ 865 bfd_boolean (*elf_backend_output_arch_syms) 866 (bfd *, struct bfd_link_info *, void *, 867 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 868 struct elf_link_hash_entry *)); 869 870 /* Copy any information related to dynamic linking from a pre-existing 871 symbol to a newly created symbol. Also called to copy flags and 872 other back-end info to a weakdef, in which case the symbol is not 873 newly created and plt/got refcounts and dynamic indices should not 874 be copied. */ 875 void (*elf_backend_copy_indirect_symbol) 876 (struct bfd_link_info *, struct elf_link_hash_entry *, 877 struct elf_link_hash_entry *); 878 879 /* Modify any information related to dynamic linking such that the 880 symbol is not exported. */ 881 void (*elf_backend_hide_symbol) 882 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 883 884 /* A function to do additional symbol fixup, called by 885 _bfd_elf_fix_symbol_flags. */ 886 bfd_boolean (*elf_backend_fixup_symbol) 887 (struct bfd_link_info *, struct elf_link_hash_entry *); 888 889 /* Merge the backend specific symbol attribute. */ 890 void (*elf_backend_merge_symbol_attribute) 891 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, 892 bfd_boolean); 893 894 /* Decide whether an undefined symbol is special and can be ignored. 895 This is the case for OPTIONAL symbols on IRIX. */ 896 bfd_boolean (*elf_backend_ignore_undef_symbol) 897 (struct elf_link_hash_entry *); 898 899 /* Emit relocations. Overrides default routine for emitting relocs, 900 except during a relocatable link, or if all relocs are being emitted. */ 901 bfd_boolean (*elf_backend_emit_relocs) 902 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 903 struct elf_link_hash_entry **); 904 905 /* Count relocations. Not called for relocatable links 906 or if all relocs are being preserved in the output. */ 907 unsigned int (*elf_backend_count_relocs) 908 (asection *, Elf_Internal_Rela *); 909 910 /* This function, if defined, is called when an NT_PRSTATUS note is found 911 in a core file. */ 912 bfd_boolean (*elf_backend_grok_prstatus) 913 (bfd *, Elf_Internal_Note *); 914 915 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO 916 note is found in a core file. */ 917 bfd_boolean (*elf_backend_grok_psinfo) 918 (bfd *, Elf_Internal_Note *); 919 920 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */ 921 void (* elf_backend_sprintf_vma) 922 (bfd *, char *, bfd_vma); 923 void (* elf_backend_fprintf_vma) 924 (bfd *, void *, bfd_vma); 925 926 /* This function returns class of a reloc type. */ 927 enum elf_reloc_type_class (*elf_backend_reloc_type_class) 928 (const Elf_Internal_Rela *); 929 930 /* This function, if defined, removes information about discarded functions 931 from other sections which mention them. */ 932 bfd_boolean (*elf_backend_discard_info) 933 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 934 935 /* This function, if defined, signals that the function above has removed 936 the discarded relocations for this section. */ 937 bfd_boolean (*elf_backend_ignore_discarded_relocs) 938 (asection *); 939 940 /* What to do when ld finds relocations against symbols defined in 941 discarded sections. */ 942 unsigned int (*action_discarded) 943 (asection *); 944 945 /* This function returns the width of FDE pointers in bytes, or 0 if 946 that can't be determined for some reason. The default definition 947 goes by the bfd's EI_CLASS. */ 948 unsigned int (*elf_backend_eh_frame_address_size) 949 (bfd *, asection *); 950 951 /* These functions tell elf-eh-frame whether to attempt to turn 952 absolute or lsda encodings into pc-relative ones. The default 953 definition enables these transformations. */ 954 bfd_boolean (*elf_backend_can_make_relative_eh_frame) 955 (bfd *, struct bfd_link_info *, asection *); 956 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) 957 (bfd *, struct bfd_link_info *, asection *); 958 959 /* This function returns an encoding after computing the encoded 960 value (and storing it in ENCODED) for the given OFFSET into OSEC, 961 to be stored in at LOC_OFFSET into the LOC_SEC input section. 962 The default definition chooses a 32-bit PC-relative encoding. */ 963 bfd_byte (*elf_backend_encode_eh_address) 964 (bfd *abfd, struct bfd_link_info *info, 965 asection *osec, bfd_vma offset, 966 asection *loc_sec, bfd_vma loc_offset, 967 bfd_vma *encoded); 968 969 /* This function, if defined, may write out the given section. 970 Returns TRUE if it did so and FALSE if the caller should. */ 971 bfd_boolean (*elf_backend_write_section) 972 (bfd *, asection *, bfd_byte *); 973 974 /* The level of IRIX compatibility we're striving for. 975 MIPS ELF specific function. */ 976 irix_compat_t (*elf_backend_mips_irix_compat) 977 (bfd *); 978 979 reloc_howto_type *(*elf_backend_mips_rtype_to_howto) 980 (unsigned int, bfd_boolean); 981 982 /* The swapping table to use when dealing with ECOFF information. 983 Used for the MIPS ELF .mdebug section. */ 984 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; 985 986 /* This function implements `bfd_elf_bfd_from_remote_memory'; 987 see elf.c, elfcode.h. */ 988 bfd *(*elf_backend_bfd_from_remote_memory) 989 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 990 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len)); 991 992 /* This function is used by `_bfd_elf_get_synthetic_symtab'; 993 see elf.c. */ 994 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); 995 996 /* Is symbol defined in common section? */ 997 bfd_boolean (*common_definition) (Elf_Internal_Sym *); 998 999 /* Return a common section index for section. */ 1000 unsigned int (*common_section_index) (asection *); 1001 1002 /* Return a common section for section. */ 1003 asection *(*common_section) (asection *); 1004 1005 /* Return TRUE if we can merge 2 definitions. */ 1006 bfd_boolean (*merge_symbol) (struct bfd_link_info *, 1007 struct elf_link_hash_entry **, 1008 struct elf_link_hash_entry *, 1009 Elf_Internal_Sym *, asection **, 1010 bfd_vma *, unsigned int *, 1011 bfd_boolean *, bfd_boolean *, 1012 bfd_boolean *, bfd_boolean *, 1013 bfd_boolean *, bfd_boolean *, 1014 bfd_boolean *, bfd_boolean *, 1015 bfd *, asection **, 1016 bfd_boolean *, bfd_boolean *, 1017 bfd_boolean *, bfd_boolean *, 1018 bfd *, asection **); 1019 1020 /* Used to handle bad SHF_LINK_ORDER input. */ 1021 bfd_error_handler_type link_order_error_handler; 1022 1023 /* Name of the PLT relocation section. */ 1024 const char *relplt_name; 1025 1026 /* Alternate EM_xxxx machine codes for this backend. */ 1027 int elf_machine_alt1; 1028 int elf_machine_alt2; 1029 1030 const struct elf_size_info *s; 1031 1032 /* An array of target specific special sections. */ 1033 const struct bfd_elf_special_section *special_sections; 1034 1035 /* The size in bytes of the header for the GOT. This includes the 1036 so-called reserved entries on some systems. */ 1037 bfd_vma got_header_size; 1038 1039 /* This is TRUE if the linker should act like collect and gather 1040 global constructors and destructors by name. This is TRUE for 1041 MIPS ELF because the Irix 5 tools can not handle the .init 1042 section. */ 1043 unsigned collect : 1; 1044 1045 /* This is TRUE if the linker should ignore changes to the type of a 1046 symbol. This is TRUE for MIPS ELF because some Irix 5 objects 1047 record undefined functions as STT_OBJECT although the definitions 1048 are STT_FUNC. */ 1049 unsigned type_change_ok : 1; 1050 1051 /* Whether the backend may use REL relocations. (Some backends use 1052 both REL and RELA relocations, and this flag is set for those 1053 backends.) */ 1054 unsigned may_use_rel_p : 1; 1055 1056 /* Whether the backend may use RELA relocations. (Some backends use 1057 both REL and RELA relocations, and this flag is set for those 1058 backends.) */ 1059 unsigned may_use_rela_p : 1; 1060 1061 /* Whether the default relocation type is RELA. If a backend with 1062 this flag set wants REL relocations for a particular section, 1063 it must note that explicitly. Similarly, if this flag is clear, 1064 and the backend wants RELA relocations for a particular 1065 section. */ 1066 unsigned default_use_rela_p : 1; 1067 1068 /* Set if RELA relocations for a relocatable link can be handled by 1069 generic code. Backends that set this flag need do nothing in the 1070 backend relocate_section routine for relocatable linking. */ 1071 unsigned rela_normal : 1; 1072 1073 /* TRUE if addresses "naturally" sign extend. This is used when 1074 swapping in from Elf32 when BFD64. */ 1075 unsigned sign_extend_vma : 1; 1076 1077 unsigned want_got_plt : 1; 1078 unsigned plt_readonly : 1; 1079 unsigned want_plt_sym : 1; 1080 unsigned plt_not_loaded : 1; 1081 unsigned plt_alignment : 4; 1082 unsigned can_gc_sections : 1; 1083 unsigned can_refcount : 1; 1084 unsigned want_got_sym : 1; 1085 unsigned want_dynbss : 1; 1086 /* Targets which do not support physical addressing often require 1087 that the p_paddr field in the section header to be set to zero. 1088 This field indicates whether this behavior is required. */ 1089 unsigned want_p_paddr_set_to_zero : 1; 1090}; 1091 1092/* Information stored for each BFD section in an ELF file. This 1093 structure is allocated by elf_new_section_hook. */ 1094 1095struct bfd_elf_section_data 1096{ 1097 /* The ELF header for this section. */ 1098 Elf_Internal_Shdr this_hdr; 1099 1100 /* The ELF header for the reloc section associated with this 1101 section, if any. */ 1102 Elf_Internal_Shdr rel_hdr; 1103 1104 /* If there is a second reloc section associated with this section, 1105 as can happen on Irix 6, this field points to the header. */ 1106 Elf_Internal_Shdr *rel_hdr2; 1107 1108 /* The number of relocations currently assigned to REL_HDR. */ 1109 unsigned int rel_count; 1110 1111 /* The number of relocations currently assigned to REL_HDR2. */ 1112 unsigned int rel_count2; 1113 1114 /* The ELF section number of this section. */ 1115 int this_idx; 1116 1117 /* The ELF section number of the reloc section indicated by 1118 REL_HDR if any. Only used for an output file. */ 1119 int rel_idx; 1120 1121 /* The ELF section number of the reloc section indicated by 1122 REL_HDR2 if any. Only used for an output file. */ 1123 int rel_idx2; 1124 1125 /* Used by the backend linker when generating a shared library to 1126 record the dynamic symbol index for a section symbol 1127 corresponding to this section. A value of 0 means that there is 1128 no dynamic symbol for this section. */ 1129 int dynindx; 1130 1131 /* A pointer to the linked-to section for SHF_LINK_ORDER. */ 1132 asection *linked_to; 1133 1134 /* Used by the backend linker to store the symbol hash table entries 1135 associated with relocs against global symbols. */ 1136 struct elf_link_hash_entry **rel_hashes; 1137 1138 /* A pointer to the swapped relocs. If the section uses REL relocs, 1139 rather than RELA, all the r_addend fields will be zero. This 1140 pointer may be NULL. It is used by the backend linker. */ 1141 Elf_Internal_Rela *relocs; 1142 1143 /* A pointer to a linked list tracking dynamic relocs copied for 1144 local symbols. */ 1145 void *local_dynrel; 1146 1147 /* A pointer to the bfd section used for dynamic relocs. */ 1148 asection *sreloc; 1149 1150 union { 1151 /* Group name, if this section is a member of a group. */ 1152 const char *name; 1153 1154 /* Group signature sym, if this is the SHT_GROUP section. */ 1155 struct bfd_symbol *id; 1156 } group; 1157 1158 /* Optional information about section group; NULL if it doesn't 1159 belongs to any section group. */ 1160 asection *sec_group; 1161 1162 /* A linked list of sections in the group. Circular when used by 1163 the linker. */ 1164 asection *next_in_group; 1165 1166 /* A pointer used for various section optimizations. */ 1167 void *sec_info; 1168}; 1169 1170#define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) 1171#define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) 1172#define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) 1173#define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) 1174#define elf_group_name(sec) (elf_section_data(sec)->group.name) 1175#define elf_group_id(sec) (elf_section_data(sec)->group.id) 1176#define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) 1177#define elf_sec_group(sec) (elf_section_data(sec)->sec_group) 1178 1179/* Return TRUE if section has been discarded. */ 1180#define elf_discarded_section(sec) \ 1181 (!bfd_is_abs_section (sec) \ 1182 && bfd_is_abs_section ((sec)->output_section) \ 1183 && (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \ 1184 && (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS) 1185 1186#define get_elf_backend_data(abfd) \ 1187 ((const struct elf_backend_data *) (abfd)->xvec->backend_data) 1188 1189/* This struct is used to pass information to routines called via 1190 elf_link_hash_traverse which must return failure. */ 1191 1192struct elf_info_failed 1193{ 1194 bfd_boolean failed; 1195 struct bfd_link_info *info; 1196 struct bfd_elf_version_tree *verdefs; 1197}; 1198 1199/* This structure is used to pass information to 1200 _bfd_elf_link_assign_sym_version. */ 1201 1202struct elf_assign_sym_version_info 1203{ 1204 /* Output BFD. */ 1205 bfd *output_bfd; 1206 /* General link information. */ 1207 struct bfd_link_info *info; 1208 /* Version tree. */ 1209 struct bfd_elf_version_tree *verdefs; 1210 /* Whether we had a failure. */ 1211 bfd_boolean failed; 1212}; 1213 1214/* This structure is used to pass information to 1215 _bfd_elf_link_find_version_dependencies. */ 1216 1217struct elf_find_verdep_info 1218{ 1219 /* Output BFD. */ 1220 bfd *output_bfd; 1221 /* General link information. */ 1222 struct bfd_link_info *info; 1223 /* The number of dependencies. */ 1224 unsigned int vers; 1225 /* Whether we had a failure. */ 1226 bfd_boolean failed; 1227}; 1228 1229/* Some private data is stashed away for future use using the tdata pointer 1230 in the bfd structure. */ 1231 1232struct elf_obj_tdata 1233{ 1234 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ 1235 Elf_Internal_Shdr **elf_sect_ptr; 1236 Elf_Internal_Phdr *phdr; 1237 struct elf_segment_map *segment_map; 1238 struct elf_strtab_hash *strtab_ptr; 1239 int num_locals; 1240 int num_globals; 1241 unsigned int num_elf_sections; /* elf_sect_ptr size */ 1242 int num_section_syms; 1243 asymbol **section_syms; /* STT_SECTION symbols for each section */ 1244 Elf_Internal_Shdr symtab_hdr; 1245 Elf_Internal_Shdr shstrtab_hdr; 1246 Elf_Internal_Shdr strtab_hdr; 1247 Elf_Internal_Shdr dynsymtab_hdr; 1248 Elf_Internal_Shdr dynstrtab_hdr; 1249 Elf_Internal_Shdr dynversym_hdr; 1250 Elf_Internal_Shdr dynverref_hdr; 1251 Elf_Internal_Shdr dynverdef_hdr; 1252 Elf_Internal_Shdr symtab_shndx_hdr; 1253 unsigned int symtab_section, shstrtab_section; 1254 unsigned int strtab_section, dynsymtab_section; 1255 unsigned int symtab_shndx_section; 1256 unsigned int dynversym_section, dynverdef_section, dynverref_section; 1257 file_ptr next_file_pos; 1258 bfd_vma gp; /* The gp value */ 1259 unsigned int gp_size; /* The gp size */ 1260 1261 /* Information grabbed from an elf core file. */ 1262 int core_signal; 1263 int core_pid; 1264 int core_lwpid; 1265 char* core_program; 1266 char* core_command; 1267 1268 /* A mapping from external symbols to entries in the linker hash 1269 table, used when linking. This is indexed by the symbol index 1270 minus the sh_info field of the symbol table header. */ 1271 struct elf_link_hash_entry **sym_hashes; 1272 1273 /* Track usage and final offsets of GOT entries for local symbols. 1274 This array is indexed by symbol index. Elements are used 1275 identically to "got" in struct elf_link_hash_entry. */ 1276 union 1277 { 1278 bfd_signed_vma *refcounts; 1279 bfd_vma *offsets; 1280 struct got_entry **ents; 1281 } local_got; 1282 1283 /* The linker ELF emulation code needs to let the backend ELF linker 1284 know what filename should be used for a dynamic object if the 1285 dynamic object is found using a search. The emulation code then 1286 sometimes needs to know what name was actually used. Until the 1287 file has been added to the linker symbol table, this field holds 1288 the name the linker wants. After it has been added, it holds the 1289 name actually used, which will be the DT_SONAME entry if there is 1290 one. */ 1291 const char *dt_name; 1292 1293 /* Records the result of `get_program_header_size'. */ 1294 bfd_size_type program_header_size; 1295 1296 /* Used by find_nearest_line entry point. */ 1297 void *line_info; 1298 1299 /* Used by MIPS ELF find_nearest_line entry point. The structure 1300 could be included directly in this one, but there's no point to 1301 wasting the memory just for the infrequently called 1302 find_nearest_line. */ 1303 struct mips_elf_find_line *find_line_info; 1304 1305 /* A place to stash dwarf1 info for this bfd. */ 1306 struct dwarf1_debug *dwarf1_find_line_info; 1307 1308 /* A place to stash dwarf2 info for this bfd. */ 1309 void *dwarf2_find_line_info; 1310 1311 /* An array of stub sections indexed by symbol number, used by the 1312 MIPS ELF linker. FIXME: We should figure out some way to only 1313 include this field for a MIPS ELF target. */ 1314 asection **local_stubs; 1315 1316 /* Used to determine if PT_GNU_EH_FRAME segment header should be 1317 created. */ 1318 asection *eh_frame_hdr; 1319 1320 Elf_Internal_Shdr **group_sect_ptr; 1321 int num_group; 1322 1323 /* Number of symbol version definitions we are about to emit. */ 1324 unsigned int cverdefs; 1325 1326 /* Number of symbol version references we are about to emit. */ 1327 unsigned int cverrefs; 1328 1329 /* Segment flags for the PT_GNU_STACK segment. */ 1330 unsigned int stack_flags; 1331 1332 /* Should the PT_GNU_RELRO segment be emitted? */ 1333 bfd_boolean relro; 1334 1335 /* Symbol version definitions in external objects. */ 1336 Elf_Internal_Verdef *verdef; 1337 1338 /* Symbol version references to external objects. */ 1339 Elf_Internal_Verneed *verref; 1340 1341 /* The Irix 5 support uses two virtual sections, which represent 1342 text/data symbols defined in dynamic objects. */ 1343 asymbol *elf_data_symbol; 1344 asymbol *elf_text_symbol; 1345 asection *elf_data_section; 1346 asection *elf_text_section; 1347 1348 /* Whether a dyanmic object was specified normally on the linker 1349 command line, or was specified when --as-needed was in effect, 1350 or was found via a DT_NEEDED entry. */ 1351 enum dynamic_lib_link_class dyn_lib_class; 1352 1353 /* This is set to TRUE if the object was created by the backend 1354 linker. */ 1355 bfd_boolean linker; 1356 1357 /* Irix 5 often screws up the symbol table, sorting local symbols 1358 after global symbols. This flag is set if the symbol table in 1359 this BFD appears to be screwed up. If it is, we ignore the 1360 sh_info field in the symbol table header, and always read all the 1361 symbols. */ 1362 bfd_boolean bad_symtab; 1363 1364 /* Used to determine if the e_flags field has been initialized */ 1365 bfd_boolean flags_init; 1366}; 1367 1368#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) 1369#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) 1370#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) 1371#define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) 1372#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) 1373#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) 1374#define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) 1375#define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) 1376#define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section) 1377#define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section) 1378#define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section) 1379#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals) 1380#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) 1381#define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) 1382#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms) 1383#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) 1384#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) 1385#define elf_gp(bfd) (elf_tdata(bfd) -> gp) 1386#define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) 1387#define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) 1388#define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) 1389#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) 1390#define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) 1391#define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) 1392#define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) 1393#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) 1394#define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init) 1395 1396extern void _bfd_elf_swap_verdef_in 1397 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); 1398extern void _bfd_elf_swap_verdef_out 1399 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); 1400extern void _bfd_elf_swap_verdaux_in 1401 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); 1402extern void _bfd_elf_swap_verdaux_out 1403 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); 1404extern void _bfd_elf_swap_verneed_in 1405 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); 1406extern void _bfd_elf_swap_verneed_out 1407 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); 1408extern void _bfd_elf_swap_vernaux_in 1409 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); 1410extern void _bfd_elf_swap_vernaux_out 1411 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); 1412extern void _bfd_elf_swap_versym_in 1413 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); 1414extern void _bfd_elf_swap_versym_out 1415 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); 1416 1417extern int _bfd_elf_section_from_bfd_section 1418 (bfd *, asection *); 1419extern char *bfd_elf_string_from_elf_section 1420 (bfd *, unsigned, unsigned); 1421extern char *bfd_elf_get_str_section 1422 (bfd *, unsigned); 1423extern Elf_Internal_Sym *bfd_elf_get_elf_syms 1424 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, 1425 Elf_External_Sym_Shndx *); 1426extern const char *bfd_elf_sym_name 1427 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); 1428 1429extern bfd_boolean _bfd_elf_copy_private_bfd_data 1430 (bfd *, bfd *); 1431extern bfd_boolean _bfd_elf_print_private_bfd_data 1432 (bfd *, void *); 1433extern void bfd_elf_print_symbol 1434 (bfd *, void *, asymbol *, bfd_print_symbol_type); 1435 1436extern void _bfd_elf_sprintf_vma 1437 (bfd *, char *, bfd_vma); 1438extern void _bfd_elf_fprintf_vma 1439 (bfd *, void *, bfd_vma); 1440 1441extern unsigned int _bfd_elf_eh_frame_address_size 1442 (bfd *, asection *); 1443extern bfd_byte _bfd_elf_encode_eh_address 1444 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, 1445 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); 1446extern bfd_boolean _bfd_elf_can_make_relative 1447 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); 1448 1449extern enum elf_reloc_type_class _bfd_elf_reloc_type_class 1450 (const Elf_Internal_Rela *); 1451extern bfd_vma _bfd_elf_rela_local_sym 1452 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); 1453extern bfd_vma _bfd_elf_rel_local_sym 1454 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); 1455extern bfd_vma _bfd_elf_section_offset 1456 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1457 1458extern unsigned long bfd_elf_hash 1459 (const char *); 1460 1461extern bfd_reloc_status_type bfd_elf_generic_reloc 1462 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 1463extern bfd_boolean bfd_elf_mkobject 1464 (bfd *); 1465extern bfd_boolean bfd_elf_mkcorefile 1466 (bfd *); 1467extern Elf_Internal_Shdr *bfd_elf_find_section 1468 (bfd *, char *); 1469extern bfd_boolean _bfd_elf_make_section_from_shdr 1470 (bfd *, Elf_Internal_Shdr *, const char *, int); 1471extern bfd_boolean _bfd_elf_make_section_from_phdr 1472 (bfd *, Elf_Internal_Phdr *, int, const char *); 1473extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc 1474 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 1475extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create 1476 (bfd *); 1477extern void _bfd_elf_link_hash_copy_indirect 1478 (struct bfd_link_info *, struct elf_link_hash_entry *, 1479 struct elf_link_hash_entry *); 1480extern void _bfd_elf_link_hash_hide_symbol 1481 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1482extern bfd_boolean _bfd_elf_link_hash_fixup_symbol 1483 (struct bfd_link_info *, struct elf_link_hash_entry *); 1484extern bfd_boolean _bfd_elf_link_hash_table_init 1485 (struct elf_link_hash_table *, bfd *, 1486 struct bfd_hash_entry *(*) 1487 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *), 1488 unsigned int); 1489extern bfd_boolean _bfd_elf_slurp_version_tables 1490 (bfd *, bfd_boolean); 1491extern bfd_boolean _bfd_elf_merge_sections 1492 (bfd *, struct bfd_link_info *); 1493extern bfd_boolean _bfd_elf_match_sections_by_type 1494 (bfd *, const asection *, bfd *, const asection *); 1495extern bfd_boolean bfd_elf_is_group_section 1496 (bfd *, const struct bfd_section *); 1497extern void _bfd_elf_section_already_linked 1498 (bfd *, struct bfd_section *); 1499extern void bfd_elf_set_group_contents 1500 (bfd *, asection *, void *); 1501extern asection *_bfd_elf_check_kept_section 1502 (asection *); 1503extern void _bfd_elf_link_just_syms 1504 (asection *, struct bfd_link_info *); 1505extern bfd_boolean _bfd_elf_copy_private_header_data 1506 (bfd *, bfd *); 1507extern bfd_boolean _bfd_elf_copy_private_symbol_data 1508 (bfd *, asymbol *, bfd *, asymbol *); 1509#define _bfd_generic_init_private_section_data \ 1510 _bfd_elf_init_private_section_data 1511extern bfd_boolean _bfd_elf_init_private_section_data 1512 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); 1513extern bfd_boolean _bfd_elf_copy_private_section_data 1514 (bfd *, asection *, bfd *, asection *); 1515extern bfd_boolean _bfd_elf_write_object_contents 1516 (bfd *); 1517extern bfd_boolean _bfd_elf_write_corefile_contents 1518 (bfd *); 1519extern bfd_boolean _bfd_elf_set_section_contents 1520 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 1521extern long _bfd_elf_get_symtab_upper_bound 1522 (bfd *); 1523extern long _bfd_elf_canonicalize_symtab 1524 (bfd *, asymbol **); 1525extern long _bfd_elf_get_dynamic_symtab_upper_bound 1526 (bfd *); 1527extern long _bfd_elf_canonicalize_dynamic_symtab 1528 (bfd *, asymbol **); 1529extern long _bfd_elf_get_synthetic_symtab 1530 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 1531extern long _bfd_elf_get_reloc_upper_bound 1532 (bfd *, sec_ptr); 1533extern long _bfd_elf_canonicalize_reloc 1534 (bfd *, sec_ptr, arelent **, asymbol **); 1535extern long _bfd_elf_get_dynamic_reloc_upper_bound 1536 (bfd *); 1537extern long _bfd_elf_canonicalize_dynamic_reloc 1538 (bfd *, arelent **, asymbol **); 1539extern asymbol *_bfd_elf_make_empty_symbol 1540 (bfd *); 1541extern void _bfd_elf_get_symbol_info 1542 (bfd *, asymbol *, symbol_info *); 1543extern bfd_boolean _bfd_elf_is_local_label_name 1544 (bfd *, const char *); 1545extern alent *_bfd_elf_get_lineno 1546 (bfd *, asymbol *); 1547extern bfd_boolean _bfd_elf_set_arch_mach 1548 (bfd *, enum bfd_architecture, unsigned long); 1549extern bfd_boolean _bfd_elf_find_nearest_line 1550 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1551 unsigned int *); 1552extern bfd_boolean _bfd_elf_find_line 1553 (bfd *, asymbol **, asymbol *, const char **, unsigned int *); 1554#define _bfd_generic_find_line _bfd_elf_find_line 1555extern bfd_boolean _bfd_elf_find_inliner_info 1556 (bfd *, const char **, const char **, unsigned int *); 1557#define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols 1558#define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 1559extern int _bfd_elf_sizeof_headers 1560 (bfd *, bfd_boolean); 1561extern bfd_boolean _bfd_elf_new_section_hook 1562 (bfd *, asection *); 1563extern bfd_boolean _bfd_elf_init_reloc_shdr 1564 (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean); 1565extern const struct bfd_elf_special_section *_bfd_elf_get_special_section 1566 (const char *, const struct bfd_elf_special_section *, unsigned int); 1567extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr 1568 (bfd *, asection *); 1569 1570/* If the target doesn't have reloc handling written yet: */ 1571extern void _bfd_elf_no_info_to_howto 1572 (bfd *, arelent *, Elf_Internal_Rela *); 1573 1574extern bfd_boolean bfd_section_from_shdr 1575 (bfd *, unsigned int shindex); 1576extern bfd_boolean bfd_section_from_phdr 1577 (bfd *, Elf_Internal_Phdr *, int); 1578 1579extern int _bfd_elf_symbol_from_bfd_symbol 1580 (bfd *, asymbol **); 1581 1582extern asection *bfd_section_from_r_symndx 1583 (bfd *, struct sym_sec_cache *, asection *, unsigned long); 1584extern asection *bfd_section_from_elf_index 1585 (bfd *, unsigned int); 1586extern struct bfd_strtab_hash *_bfd_elf_stringtab_init 1587 (void); 1588 1589extern struct elf_strtab_hash * _bfd_elf_strtab_init 1590 (void); 1591extern void _bfd_elf_strtab_free 1592 (struct elf_strtab_hash *); 1593extern bfd_size_type _bfd_elf_strtab_add 1594 (struct elf_strtab_hash *, const char *, bfd_boolean); 1595extern void _bfd_elf_strtab_addref 1596 (struct elf_strtab_hash *, bfd_size_type); 1597extern void _bfd_elf_strtab_delref 1598 (struct elf_strtab_hash *, bfd_size_type); 1599extern void _bfd_elf_strtab_clear_all_refs 1600 (struct elf_strtab_hash *); 1601extern bfd_size_type _bfd_elf_strtab_size 1602 (struct elf_strtab_hash *); 1603extern bfd_size_type _bfd_elf_strtab_offset 1604 (struct elf_strtab_hash *, bfd_size_type); 1605extern bfd_boolean _bfd_elf_strtab_emit 1606 (bfd *, struct elf_strtab_hash *); 1607extern void _bfd_elf_strtab_finalize 1608 (struct elf_strtab_hash *); 1609 1610extern bfd_boolean _bfd_elf_discard_section_eh_frame 1611 (bfd *, struct bfd_link_info *, asection *, 1612 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); 1613extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr 1614 (bfd *, struct bfd_link_info *); 1615extern bfd_vma _bfd_elf_eh_frame_section_offset 1616 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1617extern bfd_boolean _bfd_elf_write_section_eh_frame 1618 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1619extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr 1620 (bfd *, struct bfd_link_info *); 1621extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr 1622 (struct bfd_link_info *); 1623 1624extern bfd_boolean _bfd_elf_merge_symbol 1625 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, 1626 asection **, bfd_vma *, unsigned int *, 1627 struct elf_link_hash_entry **, bfd_boolean *, 1628 bfd_boolean *, bfd_boolean *, bfd_boolean *); 1629 1630extern bfd_boolean _bfd_elf_add_default_symbol 1631 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 1632 const char *, Elf_Internal_Sym *, asection **, bfd_vma *, 1633 bfd_boolean *, bfd_boolean); 1634 1635extern bfd_boolean _bfd_elf_export_symbol 1636 (struct elf_link_hash_entry *, void *); 1637 1638extern bfd_boolean _bfd_elf_link_find_version_dependencies 1639 (struct elf_link_hash_entry *, void *); 1640 1641extern bfd_boolean _bfd_elf_link_assign_sym_version 1642 (struct elf_link_hash_entry *, void *); 1643 1644extern long _bfd_elf_link_lookup_local_dynindx 1645 (struct bfd_link_info *, bfd *, long); 1646extern bfd_boolean _bfd_elf_compute_section_file_positions 1647 (bfd *, struct bfd_link_info *); 1648extern void _bfd_elf_assign_file_positions_for_relocs 1649 (bfd *); 1650extern file_ptr _bfd_elf_assign_file_position_for_section 1651 (Elf_Internal_Shdr *, file_ptr, bfd_boolean); 1652 1653extern bfd_boolean _bfd_elf_validate_reloc 1654 (bfd *, arelent *); 1655 1656extern bfd_boolean _bfd_elf_link_create_dynamic_sections 1657 (bfd *, struct bfd_link_info *); 1658extern bfd_boolean _bfd_elf_link_omit_section_dynsym 1659 (bfd *, struct bfd_link_info *, asection *); 1660extern bfd_boolean _bfd_elf_create_dynamic_sections 1661 (bfd *, struct bfd_link_info *); 1662extern bfd_boolean _bfd_elf_create_got_section 1663 (bfd *, struct bfd_link_info *); 1664extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym 1665 (bfd *, struct bfd_link_info *, asection *, const char *); 1666 1667extern bfd_boolean _bfd_elfcore_make_pseudosection 1668 (bfd *, char *, size_t, ufile_ptr); 1669extern char *_bfd_elfcore_strndup 1670 (bfd *, char *, size_t); 1671 1672extern Elf_Internal_Rela *_bfd_elf_link_read_relocs 1673 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); 1674 1675extern bfd_boolean _bfd_elf_link_size_reloc_section 1676 (bfd *, Elf_Internal_Shdr *, asection *); 1677 1678extern bfd_boolean _bfd_elf_link_output_relocs 1679 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1680 struct elf_link_hash_entry **); 1681 1682extern bfd_boolean _bfd_elf_fix_symbol_flags 1683 (struct elf_link_hash_entry *, struct elf_info_failed *); 1684 1685extern bfd_boolean _bfd_elf_adjust_dynamic_symbol 1686 (struct elf_link_hash_entry *, void *); 1687 1688extern bfd_boolean _bfd_elf_link_sec_merge_syms 1689 (struct elf_link_hash_entry *, void *); 1690 1691extern bfd_boolean _bfd_elf_dynamic_symbol_p 1692 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1693 1694extern bfd_boolean _bfd_elf_symbol_refs_local_p 1695 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1696 1697extern bfd_boolean bfd_elf_match_symbols_in_sections 1698 (asection *sec1, asection *sec2); 1699 1700extern bfd_boolean _bfd_elf_setup_sections 1701 (bfd *); 1702 1703extern const bfd_target *bfd_elf32_object_p 1704 (bfd *); 1705extern const bfd_target *bfd_elf32_core_file_p 1706 (bfd *); 1707extern char *bfd_elf32_core_file_failing_command 1708 (bfd *); 1709extern int bfd_elf32_core_file_failing_signal 1710 (bfd *); 1711extern bfd_boolean bfd_elf32_core_file_matches_executable_p 1712 (bfd *, bfd *); 1713 1714extern void bfd_elf32_swap_symbol_in 1715 (bfd *, const void *, const void *, Elf_Internal_Sym *); 1716extern void bfd_elf32_swap_symbol_out 1717 (bfd *, const Elf_Internal_Sym *, void *, void *); 1718extern void bfd_elf32_swap_reloc_in 1719 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1720extern void bfd_elf32_swap_reloc_out 1721 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1722extern void bfd_elf32_swap_reloca_in 1723 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1724extern void bfd_elf32_swap_reloca_out 1725 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1726extern void bfd_elf32_swap_phdr_in 1727 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); 1728extern void bfd_elf32_swap_phdr_out 1729 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); 1730extern void bfd_elf32_swap_dyn_in 1731 (bfd *, const void *, Elf_Internal_Dyn *); 1732extern void bfd_elf32_swap_dyn_out 1733 (bfd *, const Elf_Internal_Dyn *, void *); 1734extern long bfd_elf32_slurp_symbol_table 1735 (bfd *, asymbol **, bfd_boolean); 1736extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr 1737 (bfd *); 1738extern int bfd_elf32_write_out_phdrs 1739 (bfd *, const Elf_Internal_Phdr *, unsigned int); 1740extern void bfd_elf32_write_relocs 1741 (bfd *, asection *, void *); 1742extern bfd_boolean bfd_elf32_slurp_reloc_table 1743 (bfd *, asection *, asymbol **, bfd_boolean); 1744 1745extern const bfd_target *bfd_elf64_object_p 1746 (bfd *); 1747extern const bfd_target *bfd_elf64_core_file_p 1748 (bfd *); 1749extern char *bfd_elf64_core_file_failing_command 1750 (bfd *); 1751extern int bfd_elf64_core_file_failing_signal 1752 (bfd *); 1753extern bfd_boolean bfd_elf64_core_file_matches_executable_p 1754 (bfd *, bfd *); 1755 1756extern void bfd_elf64_swap_symbol_in 1757 (bfd *, const void *, const void *, Elf_Internal_Sym *); 1758extern void bfd_elf64_swap_symbol_out 1759 (bfd *, const Elf_Internal_Sym *, void *, void *); 1760extern void bfd_elf64_swap_reloc_in 1761 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1762extern void bfd_elf64_swap_reloc_out 1763 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1764extern void bfd_elf64_swap_reloca_in 1765 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1766extern void bfd_elf64_swap_reloca_out 1767 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1768extern void bfd_elf64_swap_phdr_in 1769 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); 1770extern void bfd_elf64_swap_phdr_out 1771 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); 1772extern void bfd_elf64_swap_dyn_in 1773 (bfd *, const void *, Elf_Internal_Dyn *); 1774extern void bfd_elf64_swap_dyn_out 1775 (bfd *, const Elf_Internal_Dyn *, void *); 1776extern long bfd_elf64_slurp_symbol_table 1777 (bfd *, asymbol **, bfd_boolean); 1778extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr 1779 (bfd *); 1780extern int bfd_elf64_write_out_phdrs 1781 (bfd *, const Elf_Internal_Phdr *, unsigned int); 1782extern void bfd_elf64_write_relocs 1783 (bfd *, asection *, void *); 1784extern bfd_boolean bfd_elf64_slurp_reloc_table 1785 (bfd *, asection *, asymbol **, bfd_boolean); 1786 1787extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup 1788 (bfd *, struct bfd_link_info *, const char *); 1789extern bfd_boolean bfd_elf_link_add_symbols 1790 (bfd *, struct bfd_link_info *); 1791extern bfd_boolean _bfd_elf_add_dynamic_entry 1792 (struct bfd_link_info *, bfd_vma, bfd_vma); 1793 1794extern bfd_boolean bfd_elf_link_record_dynamic_symbol 1795 (struct bfd_link_info *, struct elf_link_hash_entry *); 1796 1797extern int bfd_elf_link_record_local_dynamic_symbol 1798 (struct bfd_link_info *, bfd *, long); 1799 1800extern bfd_boolean _bfd_elf_close_and_cleanup 1801 (bfd *); 1802 1803extern bfd_boolean _bfd_elf_common_definition 1804 (Elf_Internal_Sym *); 1805 1806extern unsigned int _bfd_elf_common_section_index 1807 (asection *); 1808 1809extern asection *_bfd_elf_common_section 1810 (asection *); 1811 1812extern void _bfd_dwarf2_cleanup_debug_info 1813 (bfd *); 1814 1815extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 1816 (bfd *, arelent *, struct bfd_symbol *, void *, 1817 asection *, bfd *, char **); 1818 1819extern bfd_boolean bfd_elf_final_link 1820 (bfd *, struct bfd_link_info *); 1821 1822extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol 1823 (struct elf_link_hash_entry *h, void *inf); 1824 1825extern bfd_boolean bfd_elf_gc_sections 1826 (bfd *, struct bfd_link_info *); 1827 1828extern bfd_boolean bfd_elf_gc_record_vtinherit 1829 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 1830 1831extern bfd_boolean bfd_elf_gc_record_vtentry 1832 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 1833 1834extern bfd_boolean _bfd_elf_gc_mark 1835 (struct bfd_link_info *, asection *, 1836 asection * (*) (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 1837 struct elf_link_hash_entry *, Elf_Internal_Sym *)); 1838 1839extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets 1840 (bfd *, struct bfd_link_info *); 1841 1842extern bfd_boolean bfd_elf_gc_common_final_link 1843 (bfd *, struct bfd_link_info *); 1844 1845extern bfd_boolean bfd_elf_reloc_symbol_deleted_p 1846 (bfd_vma, void *); 1847 1848extern struct elf_segment_map * 1849_bfd_elf_make_dynamic_segment 1850 (bfd *, asection *); 1851 1852/* Exported interface for writing elf corefile notes. */ 1853extern char *elfcore_write_note 1854 (bfd *, char *, int *, const char *, int, const void *, int); 1855extern char *elfcore_write_prpsinfo 1856 (bfd *, char *, int *, const char *, const char *); 1857extern char *elfcore_write_prstatus 1858 (bfd *, char *, int *, long, int, const void *); 1859extern char * elfcore_write_pstatus 1860 (bfd *, char *, int *, long, int, const void *); 1861extern char *elfcore_write_prfpreg 1862 (bfd *, char *, int *, const void *, int); 1863extern char *elfcore_write_prxfpreg 1864 (bfd *, char *, int *, const void *, int); 1865extern char *elfcore_write_lwpstatus 1866 (bfd *, char *, int *, long, int, const void *); 1867 1868extern bfd *_bfd_elf32_bfd_from_remote_memory 1869 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1870 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 1871extern bfd *_bfd_elf64_bfd_from_remote_memory 1872 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1873 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 1874 1875/* Large common section. */ 1876extern asection _bfd_elf_large_com_section; 1877 1878/* SH ELF specific routine. */ 1879 1880extern bfd_boolean _sh_elf_set_mach_from_flags 1881 (bfd *); 1882 1883/* This is the condition under which finish_dynamic_symbol will be called. 1884 If our finish_dynamic_symbol isn't called, we'll need to do something 1885 about initializing any .plt and .got entries in relocate_section. */ 1886#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ 1887 ((DYN) \ 1888 && ((SHARED) || !(H)->forced_local) \ 1889 && ((H)->dynindx != -1 || (H)->forced_local)) 1890 1891/* This macro is to avoid lots of duplicated code in the body 1892 of xxx_relocate_section() in the various elfxx-xxxx.c files. */ 1893#define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ 1894 r_symndx, symtab_hdr, sym_hashes, \ 1895 h, sec, relocation, \ 1896 unresolved_reloc, warned) \ 1897 do \ 1898 { \ 1899 /* It seems this can happen with erroneous or unsupported \ 1900 input (mixing a.out and elf in an archive, for example.) */ \ 1901 if (sym_hashes == NULL) \ 1902 return FALSE; \ 1903 \ 1904 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ 1905 \ 1906 while (h->root.type == bfd_link_hash_indirect \ 1907 || h->root.type == bfd_link_hash_warning) \ 1908 h = (struct elf_link_hash_entry *) h->root.u.i.link; \ 1909 \ 1910 warned = FALSE; \ 1911 unresolved_reloc = FALSE; \ 1912 relocation = 0; \ 1913 if (h->root.type == bfd_link_hash_defined \ 1914 || h->root.type == bfd_link_hash_defweak) \ 1915 { \ 1916 sec = h->root.u.def.section; \ 1917 if (sec == NULL \ 1918 || sec->output_section == NULL) \ 1919 /* Set a flag that will be cleared later if we find a \ 1920 relocation value for this symbol. output_section \ 1921 is typically NULL for symbols satisfied by a shared \ 1922 library. */ \ 1923 unresolved_reloc = TRUE; \ 1924 else \ 1925 relocation = (h->root.u.def.value \ 1926 + sec->output_section->vma \ 1927 + sec->output_offset); \ 1928 } \ 1929 else if (h->root.type == bfd_link_hash_undefweak) \ 1930 ; \ 1931 else if (info->unresolved_syms_in_objects == RM_IGNORE \ 1932 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ 1933 ; \ 1934 else \ 1935 { \ 1936 bfd_boolean err; \ 1937 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ 1938 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ 1939 if (!info->callbacks->undefined_symbol (info, \ 1940 h->root.root.string, \ 1941 input_bfd, \ 1942 input_section, \ 1943 rel->r_offset, err)) \ 1944 return FALSE; \ 1945 warned = TRUE; \ 1946 } \ 1947 } \ 1948 while (0) 1949 1950#endif /* _LIBELF_H_ */ 1951