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 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 240struct 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 257struct 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. */ 264struct 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 285struct eh_frame_sec_info 286{ 287 unsigned int count; 288 struct eh_cie_fde entry[1]; 289}; 290 291struct eh_frame_array_ent 292{ 293 bfd_vma initial_loc; 294 bfd_vma fde; 295}; 296 297struct htab; 298 299struct 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 314struct 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 421struct sym_sec_cache 422{ 423 bfd *abfd; 424 unsigned long indx[LOCAL_SYM_CACHE_SIZE]; 425 asection *sec[LOCAL_SYM_CACHE_SIZE]; 426}; 427 428/* Constant information held for an ELF backend. */ 429 430struct 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 492enum elf_reloc_type_class { 493 reloc_class_normal, 494 reloc_class_relative, 495 reloc_class_plt, 496 reloc_class_copy 497}; 498 499struct 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 513typedef enum { 514 ict_none, 515 ict_irix5, 516 ict_irix6 517} irix_compat_t; 518 519/* Mapping of ELF section names and types. */ 520struct 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 535enum action_discarded 536 { 537 COMPLAIN = 1, 538 PRETEND = 2 539 }; 540 541struct elf_backend_data 542{ 543 /* The architecture for this backend. */ 544 enum bfd_architecture arch; 545 546 /* The ELF machine code (EM_xxxx) for this backend. */ 547 int elf_machine_code; 548 549 /* The maximum page size for this backend. */ 550 bfd_vma maxpagesize; 551 552 /* The minimum page size for this backend. An input object will not be 553 considered page aligned unless its sections are correctly aligned for 554 pages at least this large. May be smaller than maxpagesize. */ 555 bfd_vma minpagesize; 556 557 /* The common page size for this backend. */ 558 bfd_vma commonpagesize; 559 560 /* The BFD flags applied to sections created for dynamic linking. */ 561 flagword dynamic_sec_flags; 562 563 /* A function to translate an ELF RELA relocation to a BFD arelent 564 structure. */ 565 void (*elf_info_to_howto) 566 (bfd *, arelent *, Elf_Internal_Rela *); 567 568 /* A function to translate an ELF REL relocation to a BFD arelent 569 structure. */ 570 void (*elf_info_to_howto_rel) 571 (bfd *, arelent *, Elf_Internal_Rela *); 572 573 /* A function to determine whether a symbol is global when 574 partitioning the symbol table into local and global symbols. 575 This should be NULL for most targets, in which case the correct 576 thing will be done. MIPS ELF, at least on the Irix 5, has 577 special requirements. */ 578 bfd_boolean (*elf_backend_sym_is_global) 579 (bfd *, asymbol *); 580 581 /* The remaining functions are hooks which are called only if they 582 are not NULL. */ 583 584 /* A function to permit a backend specific check on whether a 585 particular BFD format is relevant for an object file, and to 586 permit the backend to set any global information it wishes. When 587 this is called elf_elfheader is set, but anything else should be 588 used with caution. If this returns FALSE, the check_format 589 routine will return a bfd_error_wrong_format error. */ 590 bfd_boolean (*elf_backend_object_p) 591 (bfd *); 592 593 /* A function to do additional symbol processing when reading the 594 ELF symbol table. This is where any processor-specific special 595 section indices are handled. */ 596 void (*elf_backend_symbol_processing) 597 (bfd *, asymbol *); 598 599 /* A function to do additional symbol processing after reading the 600 entire ELF symbol table. */ 601 bfd_boolean (*elf_backend_symbol_table_processing) 602 (bfd *, elf_symbol_type *, unsigned int); 603 604 /* A function to set the type of the info field. Processor-specific 605 types should be handled here. */ 606 int (*elf_backend_get_symbol_type) 607 (Elf_Internal_Sym *, int); 608 609 /* A function to return the linker hash table entry of a symbol that 610 might be satisfied by an archive symbol. */ 611 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup) 612 (bfd *, struct bfd_link_info *, const char *); 613 614 /* Return true if local section symbols should have a non-null st_name. 615 NULL implies false. */ 616 bfd_boolean (*elf_backend_name_local_section_symbols) 617 (bfd *); 618 619 /* A function to do additional processing on the ELF section header 620 just before writing it out. This is used to set the flags and 621 type fields for some sections, or to actually write out data for 622 unusual sections. */ 623 bfd_boolean (*elf_backend_section_processing) 624 (bfd *, Elf_Internal_Shdr *); 625 626 /* A function to handle unusual section types when creating BFD 627 sections from ELF sections. */ 628 bfd_boolean (*elf_backend_section_from_shdr) 629 (bfd *, Elf_Internal_Shdr *, const char *, int); 630 631 /* A function to convert machine dependent ELF section header flags to 632 BFD internal section header flags. */ 633 bfd_boolean (*elf_backend_section_flags) 634 (flagword *, const Elf_Internal_Shdr *); 635 636 /* A function that returns a struct containing ELF section flags and 637 type for the given BFD section. */ 638 const struct bfd_elf_special_section * (*get_sec_type_attr) 639 (bfd *, asection *); 640 641 /* A function to handle unusual program segment types when creating BFD 642 sections from ELF program segments. */ 643 bfd_boolean (*elf_backend_section_from_phdr) 644 (bfd *, Elf_Internal_Phdr *, int, const char *); 645 646 /* A function to set up the ELF section header for a BFD section in 647 preparation for writing it out. This is where the flags and type 648 fields are set for unusual sections. */ 649 bfd_boolean (*elf_backend_fake_sections) 650 (bfd *, Elf_Internal_Shdr *, asection *); 651 652 /* A function to get the ELF section index for a BFD section. If 653 this returns TRUE, the section was found. If it is a normal ELF 654 section, *RETVAL should be left unchanged. If it is not a normal 655 ELF section *RETVAL should be set to the SHN_xxxx index. */ 656 bfd_boolean (*elf_backend_section_from_bfd_section) 657 (bfd *, asection *, int *retval); 658 659 /* If this field is not NULL, it is called by the add_symbols phase 660 of a link just before adding a symbol to the global linker hash 661 table. It may modify any of the fields as it wishes. If *NAME 662 is set to NULL, the symbol will be skipped rather than being 663 added to the hash table. This function is responsible for 664 handling all processor dependent symbol bindings and section 665 indices, and must set at least *FLAGS and *SEC for each processor 666 dependent case; failure to do so will cause a link error. */ 667 bfd_boolean (*elf_add_symbol_hook) 668 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *, 669 const char **name, flagword *flags, asection **sec, bfd_vma *value); 670 671 /* If this field is not NULL, it is called by the elf_link_output_sym 672 phase of a link for each symbol which will appear in the object file. */ 673 bfd_boolean (*elf_backend_link_output_symbol_hook) 674 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *, 675 asection *, struct elf_link_hash_entry *); 676 677 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend 678 linker the first time it encounters a dynamic object in the link. 679 This function must create any sections required for dynamic 680 linking. The ABFD argument is a dynamic object. The .interp, 681 .dynamic, .dynsym, .dynstr, and .hash functions have already been 682 created, and this function may modify the section flags if 683 desired. This function will normally create the .got and .plt 684 sections, but different backends have different requirements. */ 685 bfd_boolean (*elf_backend_create_dynamic_sections) 686 (bfd *abfd, struct bfd_link_info *info); 687 688 /* When creating a shared library, determine whether to omit the 689 dynamic symbol for the section. */ 690 bfd_boolean (*elf_backend_omit_section_dynsym) 691 (bfd *output_bfd, struct bfd_link_info *info, asection *osec); 692 693 /* The CHECK_RELOCS function is called by the add_symbols phase of 694 the ELF backend linker. It is called once for each section with 695 relocs of an object file, just after the symbols for the object 696 file have been added to the global linker hash table. The 697 function must look through the relocs and do any special handling 698 required. This generally means allocating space in the global 699 offset table, and perhaps allocating space for a reloc. The 700 relocs are always passed as Rela structures; if the section 701 actually uses Rel structures, the r_addend field will always be 702 zero. */ 703 bfd_boolean (*check_relocs) 704 (bfd *abfd, struct bfd_link_info *info, asection *o, 705 const Elf_Internal_Rela *relocs); 706 707 /* The CHECK_DIRECTIVES function is called once per input file by 708 the add_symbols phase of the ELF backend linker. The function 709 must inspect the bfd and create any additional symbols according 710 to any custom directives in the bfd. */ 711 bfd_boolean (*check_directives) 712 (bfd *abfd, struct bfd_link_info *info); 713 714 /* The AS_NEEDED_CLEANUP function is called once per --as-needed 715 input file that was not needed by the add_symbols phase of the 716 ELF backend linker. The function must undo any target specific 717 changes in the symbol hash table. */ 718 bfd_boolean (*as_needed_cleanup) 719 (bfd *abfd, struct bfd_link_info *info); 720 721 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend 722 linker for every symbol which is defined by a dynamic object and 723 referenced by a regular object. This is called after all the 724 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS 725 function has been called. The hash table entry should be 726 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be 727 defined in a section from a dynamic object. Dynamic object 728 sections are not included in the final link, and this function is 729 responsible for changing the value to something which the rest of 730 the link can deal with. This will normally involve adding an 731 entry to the .plt or .got or some such section, and setting the 732 symbol to point to that. */ 733 bfd_boolean (*elf_backend_adjust_dynamic_symbol) 734 (struct bfd_link_info *info, struct elf_link_hash_entry *h); 735 736 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker 737 after all the linker input files have been seen but before the 738 section sizes have been set. This is called after 739 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */ 740 bfd_boolean (*elf_backend_always_size_sections) 741 (bfd *output_bfd, struct bfd_link_info *info); 742 743 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend 744 linker after all the linker input files have been seen but before 745 the sections sizes have been set. This is called after 746 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols. 747 It is only called when linking against a dynamic object. It must 748 set the sizes of the dynamic sections, and may fill in their 749 contents as well. The generic ELF linker can handle the .dynsym, 750 .dynstr and .hash sections. This function must handle the 751 .interp section and any sections created by the 752 CREATE_DYNAMIC_SECTIONS entry point. */ 753 bfd_boolean (*elf_backend_size_dynamic_sections) 754 (bfd *output_bfd, struct bfd_link_info *info); 755 756 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections 757 we keep to use as a base for relocs and symbols. */ 758 void (*elf_backend_init_index_section) 759 (bfd *output_bfd, struct bfd_link_info *info); 760 761 /* The RELOCATE_SECTION function is called by the ELF backend linker 762 to handle the relocations for a section. 763 764 The relocs are always passed as Rela structures; if the section 765 actually uses Rel structures, the r_addend field will always be 766 zero. 767 768 This function is responsible for adjust the section contents as 769 necessary, and (if using Rela relocs and generating a 770 relocatable output file) adjusting the reloc addend as 771 necessary. 772 773 This function does not have to worry about setting the reloc 774 address or the reloc symbol index. 775 776 LOCAL_SYMS is a pointer to the swapped in local symbols. 777 778 LOCAL_SECTIONS is an array giving the section in the input file 779 corresponding to the st_shndx field of each local symbol. 780 781 The global hash table entry for the global symbols can be found 782 via elf_sym_hashes (input_bfd). 783 784 When generating relocatable output, this function must handle 785 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 786 going to be the section symbol corresponding to the output 787 section, which means that the addend must be adjusted 788 accordingly. */ 789 bfd_boolean (*elf_backend_relocate_section) 790 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd, 791 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs, 792 Elf_Internal_Sym *local_syms, asection **local_sections); 793 794 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend 795 linker just before it writes a symbol out to the .dynsym section. 796 The processor backend may make any required adjustment to the 797 symbol. It may also take the opportunity to set contents of the 798 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on 799 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called 800 on those symbols which are defined by a dynamic object. */ 801 bfd_boolean (*elf_backend_finish_dynamic_symbol) 802 (bfd *output_bfd, struct bfd_link_info *info, 803 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym); 804 805 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend 806 linker just before it writes all the dynamic sections out to the 807 output file. The FINISH_DYNAMIC_SYMBOL will have been called on 808 all dynamic symbols. */ 809 bfd_boolean (*elf_backend_finish_dynamic_sections) 810 (bfd *output_bfd, struct bfd_link_info *info); 811 812 /* A function to do any beginning processing needed for the ELF file 813 before building the ELF headers and computing file positions. */ 814 void (*elf_backend_begin_write_processing) 815 (bfd *, struct bfd_link_info *); 816 817 /* A function to do any final processing needed for the ELF file 818 before writing it out. The LINKER argument is TRUE if this BFD 819 was created by the ELF backend linker. */ 820 void (*elf_backend_final_write_processing) 821 (bfd *, bfd_boolean linker); 822 823 /* This function is called by get_program_header_size. It should 824 return the number of additional program segments which this BFD 825 will need. It should return -1 on error. */ 826 int (*elf_backend_additional_program_headers) 827 (bfd *, struct bfd_link_info *); 828 829 /* This function is called to modify an existing segment map in a 830 backend specific fashion. */ 831 bfd_boolean (*elf_backend_modify_segment_map) 832 (bfd *, struct bfd_link_info *); 833 834 /* This function is called to modify program headers just before 835 they are written. */ 836 bfd_boolean (*elf_backend_modify_program_headers) 837 (bfd *, struct bfd_link_info *); 838 839 /* This function is called during section garbage collection to 840 mark sections that define global symbols. */ 841 bfd_boolean (*gc_mark_dynamic_ref) 842 (struct elf_link_hash_entry *h, void *inf); 843 844 /* This function is called during section gc to discover the section a 845 particular relocation refers to. */ 846 asection * (*gc_mark_hook) 847 (asection *sec, struct bfd_link_info *, Elf_Internal_Rela *, 848 struct elf_link_hash_entry *h, Elf_Internal_Sym *); 849 850 /* This function, if defined, is called during the sweep phase of gc 851 in order that a backend might update any data structures it might 852 be maintaining. */ 853 bfd_boolean (*gc_sweep_hook) 854 (bfd *abfd, struct bfd_link_info *info, asection *o, 855 const Elf_Internal_Rela *relocs); 856 857 /* This function, if defined, is called after the ELF headers have 858 been created. This allows for things like the OS and ABI versions 859 to be changed. */ 860 void (*elf_backend_post_process_headers) 861 (bfd *, struct bfd_link_info *); 862 863 /* This function, if defined, prints a symbol to file and returns the 864 name of the symbol to be printed. It should return NULL to fall 865 back to default symbol printing. */ 866 const char *(*elf_backend_print_symbol_all) 867 (bfd *, void *, asymbol *); 868 869 /* This function, if defined, is called after all local symbols and 870 global symbols converted to locals are emitted into the symtab 871 section. It allows the backend to emit special local symbols 872 not handled in the hash table. */ 873 bfd_boolean (*elf_backend_output_arch_local_syms) 874 (bfd *, struct bfd_link_info *, void *, 875 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 876 struct elf_link_hash_entry *)); 877 878 /* This function, if defined, is called after all symbols are emitted 879 into the symtab section. It allows the backend to emit special 880 global symbols not handled in the hash table. */ 881 bfd_boolean (*elf_backend_output_arch_syms) 882 (bfd *, struct bfd_link_info *, void *, 883 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 884 struct elf_link_hash_entry *)); 885 886 /* Copy any information related to dynamic linking from a pre-existing 887 symbol to a newly created symbol. Also called to copy flags and 888 other back-end info to a weakdef, in which case the symbol is not 889 newly created and plt/got refcounts and dynamic indices should not 890 be copied. */ 891 void (*elf_backend_copy_indirect_symbol) 892 (struct bfd_link_info *, struct elf_link_hash_entry *, 893 struct elf_link_hash_entry *); 894 895 /* Modify any information related to dynamic linking such that the 896 symbol is not exported. */ 897 void (*elf_backend_hide_symbol) 898 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 899 900 /* A function to do additional symbol fixup, called by 901 _bfd_elf_fix_symbol_flags. */ 902 bfd_boolean (*elf_backend_fixup_symbol) 903 (struct bfd_link_info *, struct elf_link_hash_entry *); 904 905 /* Merge the backend specific symbol attribute. */ 906 void (*elf_backend_merge_symbol_attribute) 907 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, 908 bfd_boolean); 909 910 /* Decide whether an undefined symbol is special and can be ignored. 911 This is the case for OPTIONAL symbols on IRIX. */ 912 bfd_boolean (*elf_backend_ignore_undef_symbol) 913 (struct elf_link_hash_entry *); 914 915 /* Emit relocations. Overrides default routine for emitting relocs, 916 except during a relocatable link, or if all relocs are being emitted. */ 917 bfd_boolean (*elf_backend_emit_relocs) 918 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 919 struct elf_link_hash_entry **); 920 921 /* Count relocations. Not called for relocatable links 922 or if all relocs are being preserved in the output. */ 923 unsigned int (*elf_backend_count_relocs) 924 (asection *, Elf_Internal_Rela *); 925 926 /* This function, if defined, is called when an NT_PRSTATUS note is found 927 in a core file. */ 928 bfd_boolean (*elf_backend_grok_prstatus) 929 (bfd *, Elf_Internal_Note *); 930 931 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO 932 note is found in a core file. */ 933 bfd_boolean (*elf_backend_grok_psinfo) 934 (bfd *, Elf_Internal_Note *); 935 936 /* This function, if defined, is called to write a note to a corefile. */ 937 char *(*elf_backend_write_core_note) 938 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...); 939 940 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */ 941 void (* elf_backend_sprintf_vma) 942 (bfd *, char *, bfd_vma); 943 void (* elf_backend_fprintf_vma) 944 (bfd *, void *, bfd_vma); 945 946 /* This function returns class of a reloc type. */ 947 enum elf_reloc_type_class (*elf_backend_reloc_type_class) 948 (const Elf_Internal_Rela *); 949 950 /* This function, if defined, removes information about discarded functions 951 from other sections which mention them. */ 952 bfd_boolean (*elf_backend_discard_info) 953 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 954 955 /* This function, if defined, signals that the function above has removed 956 the discarded relocations for this section. */ 957 bfd_boolean (*elf_backend_ignore_discarded_relocs) 958 (asection *); 959 960 /* What to do when ld finds relocations against symbols defined in 961 discarded sections. */ 962 unsigned int (*action_discarded) 963 (asection *); 964 965 /* This function returns the width of FDE pointers in bytes, or 0 if 966 that can't be determined for some reason. The default definition 967 goes by the bfd's EI_CLASS. */ 968 unsigned int (*elf_backend_eh_frame_address_size) 969 (bfd *, asection *); 970 971 /* These functions tell elf-eh-frame whether to attempt to turn 972 absolute or lsda encodings into pc-relative ones. The default 973 definition enables these transformations. */ 974 bfd_boolean (*elf_backend_can_make_relative_eh_frame) 975 (bfd *, struct bfd_link_info *, asection *); 976 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) 977 (bfd *, struct bfd_link_info *, asection *); 978 979 /* This function returns an encoding after computing the encoded 980 value (and storing it in ENCODED) for the given OFFSET into OSEC, 981 to be stored in at LOC_OFFSET into the LOC_SEC input section. 982 The default definition chooses a 32-bit PC-relative encoding. */ 983 bfd_byte (*elf_backend_encode_eh_address) 984 (bfd *abfd, struct bfd_link_info *info, 985 asection *osec, bfd_vma offset, 986 asection *loc_sec, bfd_vma loc_offset, 987 bfd_vma *encoded); 988 989 /* This function, if defined, may write out the given section. 990 Returns TRUE if it did so and FALSE if the caller should. */ 991 bfd_boolean (*elf_backend_write_section) 992 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 993 994 /* The level of IRIX compatibility we're striving for. 995 MIPS ELF specific function. */ 996 irix_compat_t (*elf_backend_mips_irix_compat) 997 (bfd *); 998 999 reloc_howto_type *(*elf_backend_mips_rtype_to_howto) 1000 (unsigned int, bfd_boolean); 1001 1002 /* The swapping table to use when dealing with ECOFF information. 1003 Used for the MIPS ELF .mdebug section. */ 1004 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; 1005 1006 /* This function implements `bfd_elf_bfd_from_remote_memory'; 1007 see elf.c, elfcode.h. */ 1008 bfd *(*elf_backend_bfd_from_remote_memory) 1009 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1010 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len)); 1011 1012 /* This function is used by `_bfd_elf_get_synthetic_symtab'; 1013 see elf.c. */ 1014 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); 1015 1016 /* Is symbol defined in common section? */ 1017 bfd_boolean (*common_definition) (Elf_Internal_Sym *); 1018 1019 /* Return a common section index for section. */ 1020 unsigned int (*common_section_index) (asection *); 1021 1022 /* Return a common section for section. */ 1023 asection *(*common_section) (asection *); 1024 1025 /* Return TRUE if we can merge 2 definitions. */ 1026 bfd_boolean (*merge_symbol) (struct bfd_link_info *, 1027 struct elf_link_hash_entry **, 1028 struct elf_link_hash_entry *, 1029 Elf_Internal_Sym *, asection **, 1030 bfd_vma *, unsigned int *, 1031 bfd_boolean *, bfd_boolean *, 1032 bfd_boolean *, bfd_boolean *, 1033 bfd_boolean *, bfd_boolean *, 1034 bfd_boolean *, bfd_boolean *, 1035 bfd *, asection **, 1036 bfd_boolean *, bfd_boolean *, 1037 bfd_boolean *, bfd_boolean *, 1038 bfd *, asection **); 1039 1040 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 1041 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *); 1042 1043 /* Used to handle bad SHF_LINK_ORDER input. */ 1044 bfd_error_handler_type link_order_error_handler; 1045 1046 /* Name of the PLT relocation section. */ 1047 const char *relplt_name; 1048 1049 /* Alternate EM_xxxx machine codes for this backend. */ 1050 int elf_machine_alt1; 1051 int elf_machine_alt2; 1052 1053 const struct elf_size_info *s; 1054 1055 /* An array of target specific special sections. */ 1056 const struct bfd_elf_special_section *special_sections; 1057 1058 /* The size in bytes of the header for the GOT. This includes the 1059 so-called reserved entries on some systems. */ 1060 bfd_vma got_header_size; 1061 1062 /* This is TRUE if the linker should act like collect and gather 1063 global constructors and destructors by name. This is TRUE for 1064 MIPS ELF because the Irix 5 tools can not handle the .init 1065 section. */ 1066 unsigned collect : 1; 1067 1068 /* This is TRUE if the linker should ignore changes to the type of a 1069 symbol. This is TRUE for MIPS ELF because some Irix 5 objects 1070 record undefined functions as STT_OBJECT although the definitions 1071 are STT_FUNC. */ 1072 unsigned type_change_ok : 1; 1073 1074 /* Whether the backend may use REL relocations. (Some backends use 1075 both REL and RELA relocations, and this flag is set for those 1076 backends.) */ 1077 unsigned may_use_rel_p : 1; 1078 1079 /* Whether the backend may use RELA relocations. (Some backends use 1080 both REL and RELA relocations, and this flag is set for those 1081 backends.) */ 1082 unsigned may_use_rela_p : 1; 1083 1084 /* Whether the default relocation type is RELA. If a backend with 1085 this flag set wants REL relocations for a particular section, 1086 it must note that explicitly. Similarly, if this flag is clear, 1087 and the backend wants RELA relocations for a particular 1088 section. */ 1089 unsigned default_use_rela_p : 1; 1090 1091 /* Set if RELA relocations for a relocatable link can be handled by 1092 generic code. Backends that set this flag need do nothing in the 1093 backend relocate_section routine for relocatable linking. */ 1094 unsigned rela_normal : 1; 1095 1096 /* TRUE if addresses "naturally" sign extend. This is used when 1097 swapping in from Elf32 when BFD64. */ 1098 unsigned sign_extend_vma : 1; 1099 1100 unsigned want_got_plt : 1; 1101 unsigned plt_readonly : 1; 1102 unsigned want_plt_sym : 1; 1103 unsigned plt_not_loaded : 1; 1104 unsigned plt_alignment : 4; 1105 unsigned can_gc_sections : 1; 1106 unsigned can_refcount : 1; 1107 unsigned want_got_sym : 1; 1108 unsigned want_dynbss : 1; 1109 /* Targets which do not support physical addressing often require 1110 that the p_paddr field in the section header to be set to zero. 1111 This field indicates whether this behavior is required. */ 1112 unsigned want_p_paddr_set_to_zero : 1; 1113}; 1114 1115/* Information stored for each BFD section in an ELF file. This 1116 structure is allocated by elf_new_section_hook. */ 1117 1118struct bfd_elf_section_data 1119{ 1120 /* The ELF header for this section. */ 1121 Elf_Internal_Shdr this_hdr; 1122 1123 /* The ELF header for the reloc section associated with this 1124 section, if any. */ 1125 Elf_Internal_Shdr rel_hdr; 1126 1127 /* If there is a second reloc section associated with this section, 1128 as can happen on Irix 6, this field points to the header. */ 1129 Elf_Internal_Shdr *rel_hdr2; 1130 1131 /* The number of relocations currently assigned to REL_HDR. */ 1132 unsigned int rel_count; 1133 1134 /* The number of relocations currently assigned to REL_HDR2. */ 1135 unsigned int rel_count2; 1136 1137 /* The ELF section number of this section. */ 1138 int this_idx; 1139 1140 /* The ELF section number of the reloc section indicated by 1141 REL_HDR if any. Only used for an output file. */ 1142 int rel_idx; 1143 1144 /* The ELF section number of the reloc section indicated by 1145 REL_HDR2 if any. Only used for an output file. */ 1146 int rel_idx2; 1147 1148 /* Used by the backend linker when generating a shared library to 1149 record the dynamic symbol index for a section symbol 1150 corresponding to this section. A value of 0 means that there is 1151 no dynamic symbol for this section. */ 1152 int dynindx; 1153 1154 /* A pointer to the linked-to section for SHF_LINK_ORDER. */ 1155 asection *linked_to; 1156 1157 /* Used by the backend linker to store the symbol hash table entries 1158 associated with relocs against global symbols. */ 1159 struct elf_link_hash_entry **rel_hashes; 1160 1161 /* A pointer to the swapped relocs. If the section uses REL relocs, 1162 rather than RELA, all the r_addend fields will be zero. This 1163 pointer may be NULL. It is used by the backend linker. */ 1164 Elf_Internal_Rela *relocs; 1165 1166 /* A pointer to a linked list tracking dynamic relocs copied for 1167 local symbols. */ 1168 void *local_dynrel; 1169 1170 /* A pointer to the bfd section used for dynamic relocs. */ 1171 asection *sreloc; 1172 1173 union { 1174 /* Group name, if this section is a member of a group. */ 1175 const char *name; 1176 1177 /* Group signature sym, if this is the SHT_GROUP section. */ 1178 struct bfd_symbol *id; 1179 } group; 1180 1181 /* For a member of a group, points to the SHT_GROUP section. 1182 NULL for the SHT_GROUP section itself and non-group sections. */ 1183 asection *sec_group; 1184 1185 /* A linked list of member sections in the group. Circular when used by 1186 the linker. For the SHT_GROUP section, points at first member. */ 1187 asection *next_in_group; 1188 1189 /* A pointer used for various section optimizations. */ 1190 void *sec_info; 1191}; 1192 1193#define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) 1194#define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) 1195#define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) 1196#define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) 1197#define elf_group_name(sec) (elf_section_data(sec)->group.name) 1198#define elf_group_id(sec) (elf_section_data(sec)->group.id) 1199#define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) 1200#define elf_sec_group(sec) (elf_section_data(sec)->sec_group) 1201 1202/* Return TRUE if section has been discarded. */ 1203#define elf_discarded_section(sec) \ 1204 (!bfd_is_abs_section (sec) \ 1205 && bfd_is_abs_section ((sec)->output_section) \ 1206 && (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \ 1207 && (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS) 1208 1209#define xvec_get_elf_backend_data(xvec) \ 1210 ((struct elf_backend_data *) (xvec)->backend_data) 1211 1212#define get_elf_backend_data(abfd) \ 1213 xvec_get_elf_backend_data ((abfd)->xvec) 1214 1215/* This struct is used to pass information to routines called via 1216 elf_link_hash_traverse which must return failure. */ 1217 1218struct elf_info_failed 1219{ 1220 bfd_boolean failed; 1221 struct bfd_link_info *info; 1222 struct bfd_elf_version_tree *verdefs; 1223}; 1224 1225/* This structure is used to pass information to 1226 _bfd_elf_link_assign_sym_version. */ 1227 1228struct elf_assign_sym_version_info 1229{ 1230 /* Output BFD. */ 1231 bfd *output_bfd; 1232 /* General link information. */ 1233 struct bfd_link_info *info; 1234 /* Version tree. */ 1235 struct bfd_elf_version_tree *verdefs; 1236 /* Whether we had a failure. */ 1237 bfd_boolean failed; 1238}; 1239 1240/* This structure is used to pass information to 1241 _bfd_elf_link_find_version_dependencies. */ 1242 1243struct elf_find_verdep_info 1244{ 1245 /* Output BFD. */ 1246 bfd *output_bfd; 1247 /* General link information. */ 1248 struct bfd_link_info *info; 1249 /* The number of dependencies. */ 1250 unsigned int vers; 1251 /* Whether we had a failure. */ 1252 bfd_boolean failed; 1253}; 1254 1255/* Some private data is stashed away for future use using the tdata pointer 1256 in the bfd structure. */ 1257 1258struct elf_obj_tdata 1259{ 1260 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ 1261 Elf_Internal_Shdr **elf_sect_ptr; 1262 Elf_Internal_Phdr *phdr; 1263 struct elf_segment_map *segment_map; 1264 struct elf_strtab_hash *strtab_ptr; 1265 int num_locals; 1266 int num_globals; 1267 unsigned int num_elf_sections; /* elf_sect_ptr size */ 1268 int num_section_syms; 1269 asymbol **section_syms; /* STT_SECTION symbols for each section */ 1270 Elf_Internal_Shdr symtab_hdr; 1271 Elf_Internal_Shdr shstrtab_hdr; 1272 Elf_Internal_Shdr strtab_hdr; 1273 Elf_Internal_Shdr dynsymtab_hdr; 1274 Elf_Internal_Shdr dynstrtab_hdr; 1275 Elf_Internal_Shdr dynversym_hdr; 1276 Elf_Internal_Shdr dynverref_hdr; 1277 Elf_Internal_Shdr dynverdef_hdr; 1278 Elf_Internal_Shdr symtab_shndx_hdr; 1279 unsigned int symtab_section, shstrtab_section; 1280 unsigned int strtab_section, dynsymtab_section; 1281 unsigned int symtab_shndx_section; 1282 unsigned int dynversym_section, dynverdef_section, dynverref_section; 1283 file_ptr next_file_pos; 1284 bfd_vma gp; /* The gp value */ 1285 unsigned int gp_size; /* The gp size */ 1286 1287 /* Information grabbed from an elf core file. */ 1288 int core_signal; 1289 int core_pid; 1290 int core_lwpid; 1291 char* core_program; 1292 char* core_command; 1293 1294 /* A mapping from external symbols to entries in the linker hash 1295 table, used when linking. This is indexed by the symbol index 1296 minus the sh_info field of the symbol table header. */ 1297 struct elf_link_hash_entry **sym_hashes; 1298 1299 /* Track usage and final offsets of GOT entries for local symbols. 1300 This array is indexed by symbol index. Elements are used 1301 identically to "got" in struct elf_link_hash_entry. */ 1302 union 1303 { 1304 bfd_signed_vma *refcounts; 1305 bfd_vma *offsets; 1306 struct got_entry **ents; 1307 } local_got; 1308 1309 /* The linker ELF emulation code needs to let the backend ELF linker 1310 know what filename should be used for a dynamic object if the 1311 dynamic object is found using a search. The emulation code then 1312 sometimes needs to know what name was actually used. Until the 1313 file has been added to the linker symbol table, this field holds 1314 the name the linker wants. After it has been added, it holds the 1315 name actually used, which will be the DT_SONAME entry if there is 1316 one. */ 1317 const char *dt_name; 1318 1319 /* Records the result of `get_program_header_size'. */ 1320 bfd_size_type program_header_size; 1321 1322 /* Used by find_nearest_line entry point. */ 1323 void *line_info; 1324 1325 /* Used by MIPS ELF find_nearest_line entry point. The structure 1326 could be included directly in this one, but there's no point to 1327 wasting the memory just for the infrequently called 1328 find_nearest_line. */ 1329 struct mips_elf_find_line *find_line_info; 1330 1331 /* A place to stash dwarf1 info for this bfd. */ 1332 struct dwarf1_debug *dwarf1_find_line_info; 1333 1334 /* A place to stash dwarf2 info for this bfd. */ 1335 void *dwarf2_find_line_info; 1336 1337 /* An array of stub sections indexed by symbol number, used by the 1338 MIPS ELF linker. FIXME: We should figure out some way to only 1339 include this field for a MIPS ELF target. */ 1340 asection **local_stubs; 1341 asection **local_call_stubs; 1342 1343 /* Used to determine if PT_GNU_EH_FRAME segment header should be 1344 created. */ 1345 asection *eh_frame_hdr; 1346 1347 Elf_Internal_Shdr **group_sect_ptr; 1348 int num_group; 1349 1350 /* Number of symbol version definitions we are about to emit. */ 1351 unsigned int cverdefs; 1352 1353 /* Number of symbol version references we are about to emit. */ 1354 unsigned int cverrefs; 1355 1356 /* Segment flags for the PT_GNU_STACK segment. */ 1357 unsigned int stack_flags; 1358 1359 /* Should the PT_GNU_RELRO segment be emitted? */ 1360 bfd_boolean relro; 1361 1362 /* Symbol version definitions in external objects. */ 1363 Elf_Internal_Verdef *verdef; 1364 1365 /* Symbol version references to external objects. */ 1366 Elf_Internal_Verneed *verref; 1367 1368 /* The Irix 5 support uses two virtual sections, which represent 1369 text/data symbols defined in dynamic objects. */ 1370 asymbol *elf_data_symbol; 1371 asymbol *elf_text_symbol; 1372 asection *elf_data_section; 1373 asection *elf_text_section; 1374 1375 /* Whether a dyanmic object was specified normally on the linker 1376 command line, or was specified when --as-needed was in effect, 1377 or was found via a DT_NEEDED entry. */ 1378 enum dynamic_lib_link_class dyn_lib_class; 1379 1380 /* This is set to TRUE if the object was created by the backend 1381 linker. */ 1382 bfd_boolean linker; 1383 1384 /* Irix 5 often screws up the symbol table, sorting local symbols 1385 after global symbols. This flag is set if the symbol table in 1386 this BFD appears to be screwed up. If it is, we ignore the 1387 sh_info field in the symbol table header, and always read all the 1388 symbols. */ 1389 bfd_boolean bad_symtab; 1390 1391 /* Used to determine if the e_flags field has been initialized */ 1392 bfd_boolean flags_init; 1393 1394 /* Symbol buffer. */ 1395 void *symbuf; 1396}; 1397 1398#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) 1399#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) 1400#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) 1401#define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) 1402#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) 1403#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) 1404#define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) 1405#define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) 1406#define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section) 1407#define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section) 1408#define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section) 1409#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals) 1410#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) 1411#define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) 1412#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms) 1413#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) 1414#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) 1415#define elf_gp(bfd) (elf_tdata(bfd) -> gp) 1416#define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) 1417#define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) 1418#define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) 1419#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) 1420#define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) 1421#define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) 1422#define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) 1423#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) 1424#define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init) 1425 1426extern void _bfd_elf_swap_verdef_in 1427 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); 1428extern void _bfd_elf_swap_verdef_out 1429 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); 1430extern void _bfd_elf_swap_verdaux_in 1431 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); 1432extern void _bfd_elf_swap_verdaux_out 1433 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); 1434extern void _bfd_elf_swap_verneed_in 1435 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); 1436extern void _bfd_elf_swap_verneed_out 1437 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); 1438extern void _bfd_elf_swap_vernaux_in 1439 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); 1440extern void _bfd_elf_swap_vernaux_out 1441 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); 1442extern void _bfd_elf_swap_versym_in 1443 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); 1444extern void _bfd_elf_swap_versym_out 1445 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); 1446 1447extern int _bfd_elf_section_from_bfd_section 1448 (bfd *, asection *); 1449extern char *bfd_elf_string_from_elf_section 1450 (bfd *, unsigned, unsigned); 1451extern char *bfd_elf_get_str_section 1452 (bfd *, unsigned); 1453extern Elf_Internal_Sym *bfd_elf_get_elf_syms 1454 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, 1455 Elf_External_Sym_Shndx *); 1456extern const char *bfd_elf_sym_name 1457 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); 1458 1459extern bfd_boolean _bfd_elf_copy_private_bfd_data 1460 (bfd *, bfd *); 1461extern bfd_boolean _bfd_elf_print_private_bfd_data 1462 (bfd *, void *); 1463extern void bfd_elf_print_symbol 1464 (bfd *, void *, asymbol *, bfd_print_symbol_type); 1465 1466extern void _bfd_elf_sprintf_vma 1467 (bfd *, char *, bfd_vma); 1468extern void _bfd_elf_fprintf_vma 1469 (bfd *, void *, bfd_vma); 1470 1471extern unsigned int _bfd_elf_eh_frame_address_size 1472 (bfd *, asection *); 1473extern bfd_byte _bfd_elf_encode_eh_address 1474 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, 1475 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); 1476extern bfd_boolean _bfd_elf_can_make_relative 1477 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); 1478 1479extern enum elf_reloc_type_class _bfd_elf_reloc_type_class 1480 (const Elf_Internal_Rela *); 1481extern bfd_vma _bfd_elf_rela_local_sym 1482 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); 1483extern bfd_vma _bfd_elf_rel_local_sym 1484 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); 1485extern bfd_vma _bfd_elf_section_offset 1486 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1487 1488extern unsigned long bfd_elf_hash 1489 (const char *); 1490extern unsigned long bfd_elf_gnu_hash 1491 (const char *); 1492 1493extern bfd_reloc_status_type bfd_elf_generic_reloc 1494 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 1495extern bfd_boolean bfd_elf_mkobject 1496 (bfd *); 1497extern bfd_boolean bfd_elf_mkcorefile 1498 (bfd *); 1499extern Elf_Internal_Shdr *bfd_elf_find_section 1500 (bfd *, char *); 1501extern bfd_boolean _bfd_elf_make_section_from_shdr 1502 (bfd *, Elf_Internal_Shdr *, const char *, int); 1503extern bfd_boolean _bfd_elf_make_section_from_phdr 1504 (bfd *, Elf_Internal_Phdr *, int, const char *); 1505extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc 1506 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 1507extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create 1508 (bfd *); 1509extern void _bfd_elf_link_hash_copy_indirect 1510 (struct bfd_link_info *, struct elf_link_hash_entry *, 1511 struct elf_link_hash_entry *); 1512extern void _bfd_elf_link_hash_hide_symbol 1513 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1514extern bfd_boolean _bfd_elf_link_hash_fixup_symbol 1515 (struct bfd_link_info *, struct elf_link_hash_entry *); 1516extern bfd_boolean _bfd_elf_link_hash_table_init 1517 (struct elf_link_hash_table *, bfd *, 1518 struct bfd_hash_entry *(*) 1519 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *), 1520 unsigned int); 1521extern bfd_boolean _bfd_elf_slurp_version_tables 1522 (bfd *, bfd_boolean); 1523extern bfd_boolean _bfd_elf_merge_sections 1524 (bfd *, struct bfd_link_info *); 1525extern bfd_boolean _bfd_elf_match_sections_by_type 1526 (bfd *, const asection *, bfd *, const asection *); 1527extern bfd_boolean bfd_elf_is_group_section 1528 (bfd *, const struct bfd_section *); 1529extern void _bfd_elf_section_already_linked 1530 (bfd *, struct bfd_section *, struct bfd_link_info *); 1531extern void bfd_elf_set_group_contents 1532 (bfd *, asection *, void *); 1533extern asection *_bfd_elf_check_kept_section 1534 (asection *, struct bfd_link_info *); 1535extern void _bfd_elf_link_just_syms 1536 (asection *, struct bfd_link_info *); 1537extern bfd_boolean _bfd_elf_copy_private_header_data 1538 (bfd *, bfd *); 1539extern bfd_boolean _bfd_elf_copy_private_symbol_data 1540 (bfd *, asymbol *, bfd *, asymbol *); 1541#define _bfd_generic_init_private_section_data \ 1542 _bfd_elf_init_private_section_data 1543extern bfd_boolean _bfd_elf_init_private_section_data 1544 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); 1545extern bfd_boolean _bfd_elf_copy_private_section_data 1546 (bfd *, asection *, bfd *, asection *); 1547extern bfd_boolean _bfd_elf_write_object_contents 1548 (bfd *); 1549extern bfd_boolean _bfd_elf_write_corefile_contents 1550 (bfd *); 1551extern bfd_boolean _bfd_elf_set_section_contents 1552 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 1553extern long _bfd_elf_get_symtab_upper_bound 1554 (bfd *); 1555extern long _bfd_elf_canonicalize_symtab 1556 (bfd *, asymbol **); 1557extern long _bfd_elf_get_dynamic_symtab_upper_bound 1558 (bfd *); 1559extern long _bfd_elf_canonicalize_dynamic_symtab 1560 (bfd *, asymbol **); 1561extern long _bfd_elf_get_synthetic_symtab 1562 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 1563extern long _bfd_elf_get_reloc_upper_bound 1564 (bfd *, sec_ptr); 1565extern long _bfd_elf_canonicalize_reloc 1566 (bfd *, sec_ptr, arelent **, asymbol **); 1567extern long _bfd_elf_get_dynamic_reloc_upper_bound 1568 (bfd *); 1569extern long _bfd_elf_canonicalize_dynamic_reloc 1570 (bfd *, arelent **, asymbol **); 1571extern asymbol *_bfd_elf_make_empty_symbol 1572 (bfd *); 1573extern void _bfd_elf_get_symbol_info 1574 (bfd *, asymbol *, symbol_info *); 1575extern bfd_boolean _bfd_elf_is_local_label_name 1576 (bfd *, const char *); 1577extern alent *_bfd_elf_get_lineno 1578 (bfd *, asymbol *); 1579extern bfd_boolean _bfd_elf_set_arch_mach 1580 (bfd *, enum bfd_architecture, unsigned long); 1581extern bfd_boolean _bfd_elf_find_nearest_line 1582 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1583 unsigned int *); 1584extern bfd_boolean _bfd_elf_find_line 1585 (bfd *, asymbol **, asymbol *, const char **, unsigned int *); 1586#define _bfd_generic_find_line _bfd_elf_find_line 1587extern bfd_boolean _bfd_elf_find_inliner_info 1588 (bfd *, const char **, const char **, unsigned int *); 1589#define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols 1590#define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 1591extern int _bfd_elf_sizeof_headers 1592 (bfd *, struct bfd_link_info *); 1593extern bfd_boolean _bfd_elf_new_section_hook 1594 (bfd *, asection *); 1595extern bfd_boolean _bfd_elf_init_reloc_shdr 1596 (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean); 1597extern const struct bfd_elf_special_section *_bfd_elf_get_special_section 1598 (const char *, const struct bfd_elf_special_section *, unsigned int); 1599extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr 1600 (bfd *, asection *); 1601 1602/* If the target doesn't have reloc handling written yet: */ 1603extern void _bfd_elf_no_info_to_howto 1604 (bfd *, arelent *, Elf_Internal_Rela *); 1605 1606extern bfd_boolean bfd_section_from_shdr 1607 (bfd *, unsigned int shindex); 1608extern bfd_boolean bfd_section_from_phdr 1609 (bfd *, Elf_Internal_Phdr *, int); 1610 1611extern int _bfd_elf_symbol_from_bfd_symbol 1612 (bfd *, asymbol **); 1613 1614extern asection *bfd_section_from_r_symndx 1615 (bfd *, struct sym_sec_cache *, asection *, unsigned long); 1616extern asection *bfd_section_from_elf_index 1617 (bfd *, unsigned int); 1618extern struct bfd_strtab_hash *_bfd_elf_stringtab_init 1619 (void); 1620 1621extern struct elf_strtab_hash * _bfd_elf_strtab_init 1622 (void); 1623extern void _bfd_elf_strtab_free 1624 (struct elf_strtab_hash *); 1625extern bfd_size_type _bfd_elf_strtab_add 1626 (struct elf_strtab_hash *, const char *, bfd_boolean); 1627extern void _bfd_elf_strtab_addref 1628 (struct elf_strtab_hash *, bfd_size_type); 1629extern void _bfd_elf_strtab_delref 1630 (struct elf_strtab_hash *, bfd_size_type); 1631extern void _bfd_elf_strtab_clear_all_refs 1632 (struct elf_strtab_hash *); 1633extern bfd_size_type _bfd_elf_strtab_size 1634 (struct elf_strtab_hash *); 1635extern bfd_size_type _bfd_elf_strtab_offset 1636 (struct elf_strtab_hash *, bfd_size_type); 1637extern bfd_boolean _bfd_elf_strtab_emit 1638 (bfd *, struct elf_strtab_hash *); 1639extern void _bfd_elf_strtab_finalize 1640 (struct elf_strtab_hash *); 1641 1642extern bfd_boolean _bfd_elf_discard_section_eh_frame 1643 (bfd *, struct bfd_link_info *, asection *, 1644 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); 1645extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr 1646 (bfd *, struct bfd_link_info *); 1647extern bfd_vma _bfd_elf_eh_frame_section_offset 1648 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1649extern bfd_boolean _bfd_elf_write_section_eh_frame 1650 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1651extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr 1652 (bfd *, struct bfd_link_info *); 1653extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr 1654 (struct bfd_link_info *); 1655 1656extern bfd_boolean _bfd_elf_merge_symbol 1657 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, 1658 asection **, bfd_vma *, unsigned int *, 1659 struct elf_link_hash_entry **, bfd_boolean *, 1660 bfd_boolean *, bfd_boolean *, bfd_boolean *); 1661 1662extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); 1663 1664extern bfd_boolean _bfd_elf_add_default_symbol 1665 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 1666 const char *, Elf_Internal_Sym *, asection **, bfd_vma *, 1667 bfd_boolean *, bfd_boolean); 1668 1669extern bfd_boolean _bfd_elf_export_symbol 1670 (struct elf_link_hash_entry *, void *); 1671 1672extern bfd_boolean _bfd_elf_link_find_version_dependencies 1673 (struct elf_link_hash_entry *, void *); 1674 1675extern bfd_boolean _bfd_elf_link_assign_sym_version 1676 (struct elf_link_hash_entry *, void *); 1677 1678extern long _bfd_elf_link_lookup_local_dynindx 1679 (struct bfd_link_info *, bfd *, long); 1680extern bfd_boolean _bfd_elf_compute_section_file_positions 1681 (bfd *, struct bfd_link_info *); 1682extern void _bfd_elf_assign_file_positions_for_relocs 1683 (bfd *); 1684extern file_ptr _bfd_elf_assign_file_position_for_section 1685 (Elf_Internal_Shdr *, file_ptr, bfd_boolean); 1686 1687extern bfd_boolean _bfd_elf_validate_reloc 1688 (bfd *, arelent *); 1689 1690extern bfd_boolean _bfd_elf_link_create_dynamic_sections 1691 (bfd *, struct bfd_link_info *); 1692extern bfd_boolean _bfd_elf_link_omit_section_dynsym 1693 (bfd *, struct bfd_link_info *, asection *); 1694extern bfd_boolean _bfd_elf_create_dynamic_sections 1695 (bfd *, struct bfd_link_info *); 1696extern bfd_boolean _bfd_elf_create_got_section 1697 (bfd *, struct bfd_link_info *); 1698extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym 1699 (bfd *, struct bfd_link_info *, asection *, const char *); 1700extern void _bfd_elf_init_1_index_section 1701 (bfd *, struct bfd_link_info *); 1702extern void _bfd_elf_init_2_index_sections 1703 (bfd *, struct bfd_link_info *); 1704 1705extern bfd_boolean _bfd_elfcore_make_pseudosection 1706 (bfd *, char *, size_t, ufile_ptr); 1707extern char *_bfd_elfcore_strndup 1708 (bfd *, char *, size_t); 1709 1710extern Elf_Internal_Rela *_bfd_elf_link_read_relocs 1711 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); 1712 1713extern bfd_boolean _bfd_elf_link_size_reloc_section 1714 (bfd *, Elf_Internal_Shdr *, asection *); 1715 1716extern bfd_boolean _bfd_elf_link_output_relocs 1717 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1718 struct elf_link_hash_entry **); 1719 1720extern bfd_boolean _bfd_elf_fix_symbol_flags 1721 (struct elf_link_hash_entry *, struct elf_info_failed *); 1722 1723extern bfd_boolean _bfd_elf_adjust_dynamic_symbol 1724 (struct elf_link_hash_entry *, void *); 1725 1726extern bfd_boolean _bfd_elf_link_sec_merge_syms 1727 (struct elf_link_hash_entry *, void *); 1728 1729extern bfd_boolean _bfd_elf_dynamic_symbol_p 1730 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1731 1732extern bfd_boolean _bfd_elf_symbol_refs_local_p 1733 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1734 1735extern bfd_boolean bfd_elf_match_symbols_in_sections 1736 (asection *, asection *, struct bfd_link_info *); 1737 1738extern void bfd_elf_perform_complex_relocation 1739 (bfd * output_bfd ATTRIBUTE_UNUSED, 1740 struct bfd_link_info * info, 1741 bfd * input_bfd, 1742 asection * input_section, 1743 bfd_byte * contents, 1744 Elf_Internal_Rela * rel, 1745 Elf_Internal_Sym * local_syms, 1746 asection ** local_sections); 1747 1748extern bfd_boolean _bfd_elf_setup_sections 1749 (bfd *); 1750 1751extern const bfd_target *bfd_elf32_object_p 1752 (bfd *); 1753extern const bfd_target *bfd_elf32_core_file_p 1754 (bfd *); 1755extern char *bfd_elf32_core_file_failing_command 1756 (bfd *); 1757extern int bfd_elf32_core_file_failing_signal 1758 (bfd *); 1759extern bfd_boolean bfd_elf32_core_file_matches_executable_p 1760 (bfd *, bfd *); 1761 1762extern bfd_boolean bfd_elf32_swap_symbol_in 1763 (bfd *, const void *, const void *, Elf_Internal_Sym *); 1764extern void bfd_elf32_swap_symbol_out 1765 (bfd *, const Elf_Internal_Sym *, void *, void *); 1766extern void bfd_elf32_swap_reloc_in 1767 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1768extern void bfd_elf32_swap_reloc_out 1769 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1770extern void bfd_elf32_swap_reloca_in 1771 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1772extern void bfd_elf32_swap_reloca_out 1773 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1774extern void bfd_elf32_swap_phdr_in 1775 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); 1776extern void bfd_elf32_swap_phdr_out 1777 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); 1778extern void bfd_elf32_swap_dyn_in 1779 (bfd *, const void *, Elf_Internal_Dyn *); 1780extern void bfd_elf32_swap_dyn_out 1781 (bfd *, const Elf_Internal_Dyn *, void *); 1782extern long bfd_elf32_slurp_symbol_table 1783 (bfd *, asymbol **, bfd_boolean); 1784extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr 1785 (bfd *); 1786extern int bfd_elf32_write_out_phdrs 1787 (bfd *, const Elf_Internal_Phdr *, unsigned int); 1788extern void bfd_elf32_write_relocs 1789 (bfd *, asection *, void *); 1790extern bfd_boolean bfd_elf32_slurp_reloc_table 1791 (bfd *, asection *, asymbol **, bfd_boolean); 1792 1793extern const bfd_target *bfd_elf64_object_p 1794 (bfd *); 1795extern const bfd_target *bfd_elf64_core_file_p 1796 (bfd *); 1797extern char *bfd_elf64_core_file_failing_command 1798 (bfd *); 1799extern int bfd_elf64_core_file_failing_signal 1800 (bfd *); 1801extern bfd_boolean bfd_elf64_core_file_matches_executable_p 1802 (bfd *, bfd *); 1803 1804extern bfd_boolean bfd_elf64_swap_symbol_in 1805 (bfd *, const void *, const void *, Elf_Internal_Sym *); 1806extern void bfd_elf64_swap_symbol_out 1807 (bfd *, const Elf_Internal_Sym *, void *, void *); 1808extern void bfd_elf64_swap_reloc_in 1809 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1810extern void bfd_elf64_swap_reloc_out 1811 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1812extern void bfd_elf64_swap_reloca_in 1813 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1814extern void bfd_elf64_swap_reloca_out 1815 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1816extern void bfd_elf64_swap_phdr_in 1817 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); 1818extern void bfd_elf64_swap_phdr_out 1819 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); 1820extern void bfd_elf64_swap_dyn_in 1821 (bfd *, const void *, Elf_Internal_Dyn *); 1822extern void bfd_elf64_swap_dyn_out 1823 (bfd *, const Elf_Internal_Dyn *, void *); 1824extern long bfd_elf64_slurp_symbol_table 1825 (bfd *, asymbol **, bfd_boolean); 1826extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr 1827 (bfd *); 1828extern int bfd_elf64_write_out_phdrs 1829 (bfd *, const Elf_Internal_Phdr *, unsigned int); 1830extern void bfd_elf64_write_relocs 1831 (bfd *, asection *, void *); 1832extern bfd_boolean bfd_elf64_slurp_reloc_table 1833 (bfd *, asection *, asymbol **, bfd_boolean); 1834 1835extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup 1836 (bfd *, struct bfd_link_info *, const char *); 1837extern bfd_boolean bfd_elf_link_add_symbols 1838 (bfd *, struct bfd_link_info *); 1839extern bfd_boolean _bfd_elf_add_dynamic_entry 1840 (struct bfd_link_info *, bfd_vma, bfd_vma); 1841 1842extern bfd_boolean bfd_elf_link_record_dynamic_symbol 1843 (struct bfd_link_info *, struct elf_link_hash_entry *); 1844 1845extern int bfd_elf_link_record_local_dynamic_symbol 1846 (struct bfd_link_info *, bfd *, long); 1847 1848extern void bfd_elf_link_mark_dynamic_symbol 1849 (struct bfd_link_info *, struct elf_link_hash_entry *, 1850 Elf_Internal_Sym *); 1851 1852extern bfd_boolean _bfd_elf_close_and_cleanup 1853 (bfd *); 1854 1855extern bfd_boolean _bfd_elf_common_definition 1856 (Elf_Internal_Sym *); 1857 1858extern unsigned int _bfd_elf_common_section_index 1859 (asection *); 1860 1861extern asection *_bfd_elf_common_section 1862 (asection *); 1863 1864extern void _bfd_dwarf2_cleanup_debug_info 1865 (bfd *); 1866 1867extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 1868 (bfd *, arelent *, struct bfd_symbol *, void *, 1869 asection *, bfd *, char **); 1870 1871extern bfd_boolean bfd_elf_final_link 1872 (bfd *, struct bfd_link_info *); 1873 1874extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol 1875 (struct elf_link_hash_entry *h, void *inf); 1876 1877extern bfd_boolean bfd_elf_gc_sections 1878 (bfd *, struct bfd_link_info *); 1879 1880extern bfd_boolean bfd_elf_gc_record_vtinherit 1881 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 1882 1883extern bfd_boolean bfd_elf_gc_record_vtentry 1884 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 1885 1886extern asection *_bfd_elf_gc_mark_hook 1887 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 1888 struct elf_link_hash_entry *, Elf_Internal_Sym *); 1889 1890extern bfd_boolean _bfd_elf_gc_mark 1891 (struct bfd_link_info *, asection *, 1892 asection * (*) (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 1893 struct elf_link_hash_entry *, Elf_Internal_Sym *)); 1894 1895extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets 1896 (bfd *, struct bfd_link_info *); 1897 1898extern bfd_boolean bfd_elf_gc_common_final_link 1899 (bfd *, struct bfd_link_info *); 1900 1901extern bfd_boolean bfd_elf_reloc_symbol_deleted_p 1902 (bfd_vma, void *); 1903 1904extern struct elf_segment_map * _bfd_elf_make_dynamic_segment 1905 (bfd *, asection *); 1906 1907extern bfd_boolean _bfd_elf_map_sections_to_segments 1908 (bfd *, struct bfd_link_info *); 1909 1910/* Exported interface for writing elf corefile notes. */ 1911extern char *elfcore_write_note 1912 (bfd *, char *, int *, const char *, int, const void *, int); 1913extern char *elfcore_write_prpsinfo 1914 (bfd *, char *, int *, const char *, const char *); 1915extern char *elfcore_write_prstatus 1916 (bfd *, char *, int *, long, int, const void *); 1917extern char * elfcore_write_pstatus 1918 (bfd *, char *, int *, long, int, const void *); 1919extern char *elfcore_write_prfpreg 1920 (bfd *, char *, int *, const void *, int); 1921extern char *elfcore_write_prxfpreg 1922 (bfd *, char *, int *, const void *, int); 1923extern char *elfcore_write_lwpstatus 1924 (bfd *, char *, int *, long, int, const void *); 1925 1926extern bfd *_bfd_elf32_bfd_from_remote_memory 1927 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1928 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 1929extern bfd *_bfd_elf64_bfd_from_remote_memory 1930 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1931 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 1932 1933/* Large common section. */ 1934extern asection _bfd_elf_large_com_section; 1935 1936/* SH ELF specific routine. */ 1937 1938extern bfd_boolean _sh_elf_set_mach_from_flags 1939 (bfd *); 1940 1941/* This is the condition under which finish_dynamic_symbol will be called. 1942 If our finish_dynamic_symbol isn't called, we'll need to do something 1943 about initializing any .plt and .got entries in relocate_section. */ 1944#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ 1945 ((DYN) \ 1946 && ((SHARED) || !(H)->forced_local) \ 1947 && ((H)->dynindx != -1 || (H)->forced_local)) 1948 1949/* This macro is to avoid lots of duplicated code in the body 1950 of xxx_relocate_section() in the various elfxx-xxxx.c files. */ 1951#define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ 1952 r_symndx, symtab_hdr, sym_hashes, \ 1953 h, sec, relocation, \ 1954 unresolved_reloc, warned) \ 1955 do \ 1956 { \ 1957 /* It seems this can happen with erroneous or unsupported \ 1958 input (mixing a.out and elf in an archive, for example.) */ \ 1959 if (sym_hashes == NULL) \ 1960 return FALSE; \ 1961 \ 1962 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ 1963 \ 1964 while (h->root.type == bfd_link_hash_indirect \ 1965 || h->root.type == bfd_link_hash_warning) \ 1966 h = (struct elf_link_hash_entry *) h->root.u.i.link; \ 1967 \ 1968 warned = FALSE; \ 1969 unresolved_reloc = FALSE; \ 1970 relocation = 0; \ 1971 if (h->root.type == bfd_link_hash_defined \ 1972 || h->root.type == bfd_link_hash_defweak) \ 1973 { \ 1974 sec = h->root.u.def.section; \ 1975 if (sec == NULL \ 1976 || sec->output_section == NULL) \ 1977 /* Set a flag that will be cleared later if we find a \ 1978 relocation value for this symbol. output_section \ 1979 is typically NULL for symbols satisfied by a shared \ 1980 library. */ \ 1981 unresolved_reloc = TRUE; \ 1982 else \ 1983 relocation = (h->root.u.def.value \ 1984 + sec->output_section->vma \ 1985 + sec->output_offset); \ 1986 } \ 1987 else if (h->root.type == bfd_link_hash_undefweak) \ 1988 ; \ 1989 else if (info->unresolved_syms_in_objects == RM_IGNORE \ 1990 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ 1991 ; \ 1992 else \ 1993 { \ 1994 bfd_boolean err; \ 1995 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ 1996 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ 1997 if (!info->callbacks->undefined_symbol (info, \ 1998 h->root.root.string, \ 1999 input_bfd, \ 2000 input_section, \ 2001 rel->r_offset, err)) \ 2002 return FALSE; \ 2003 warned = TRUE; \ 2004 } \ 2005 } \ 2006 while (0) 2007 2008/* Will a symbol be bound to the the definition within the shared 2009 library, if any. */ 2010#define SYMBOLIC_BIND(INFO, H) \ 2011 ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)) 2012 2013#endif /* _LIBELF_H_ */ 2014