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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 unsigned char augmentation[20]; 273 unsigned int code_align; 274 int data_align; 275 unsigned int ra_column; 276 unsigned int 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 /* For FDEs, this points to the CIE used. */ 290 struct eh_cie_fde *cie_inf; 291 unsigned int size; 292 unsigned int offset; 293 unsigned int new_offset; 294 unsigned char fde_encoding; 295 unsigned char lsda_encoding; 296 unsigned char lsda_offset; 297 unsigned int cie : 1; 298 unsigned int removed : 1; 299 unsigned int make_relative : 1; 300 unsigned int make_lsda_relative : 1; 301 unsigned int need_relative : 1; 302 unsigned int need_lsda_relative : 1; 303 unsigned int per_encoding_relative : 1; 304}; 305 306struct eh_frame_sec_info 307{ 308 unsigned int count; 309 unsigned int alloced; 310 struct eh_cie_fde entry[1]; 311}; 312 313struct eh_frame_array_ent 314{ 315 bfd_vma initial_loc; 316 bfd_vma fde; 317}; 318 319struct eh_frame_hdr_info 320{ 321 struct cie last_cie; 322 asection *last_cie_sec; 323 struct eh_cie_fde *last_cie_inf; 324 asection *hdr_sec; 325 unsigned int fde_count, array_count; 326 struct eh_frame_array_ent *array; 327 /* TRUE if .eh_frame_hdr should contain the sorted search table. 328 We build it if we successfully read all .eh_frame input sections 329 and recognize them. */ 330 bfd_boolean table; 331 bfd_boolean offsets_adjusted; 332}; 333 334/* ELF linker hash table. */ 335 336struct elf_link_hash_table 337{ 338 struct bfd_link_hash_table root; 339 340 /* Whether we have created the special dynamic sections required 341 when linking against or generating a shared object. */ 342 bfd_boolean dynamic_sections_created; 343 344 /* The BFD used to hold special sections created by the linker. 345 This will be the first BFD found which requires these sections to 346 be created. */ 347 bfd *dynobj; 348 349 /* The value to use when initialising got.refcount/offset and 350 plt.refcount/offset in an elf_link_hash_entry. Set to zero when 351 the values are refcounts. Set to init_offset in 352 size_dynamic_sections when the values may be offsets. */ 353 union gotplt_union init_refcount; 354 355 /* The value to use for got.refcount/offset and plt.refcount/offset 356 when the values may be offsets. Normally (bfd_vma) -1. */ 357 union gotplt_union init_offset; 358 359 /* The number of symbols found in the link which must be put into 360 the .dynsym section. */ 361 bfd_size_type dynsymcount; 362 363 /* The string table of dynamic symbols, which becomes the .dynstr 364 section. */ 365 struct elf_strtab_hash *dynstr; 366 367 /* The number of buckets in the hash table in the .hash section. 368 This is based on the number of dynamic symbols. */ 369 bfd_size_type bucketcount; 370 371 /* A linked list of DT_NEEDED names found in dynamic objects 372 included in the link. */ 373 struct bfd_link_needed_list *needed; 374 375 /* The _GLOBAL_OFFSET_TABLE_ symbol. */ 376 struct elf_link_hash_entry *hgot; 377 378 /* A pointer to information used to merge SEC_MERGE sections. */ 379 void *merge_info; 380 381 /* Used to link stabs in sections. */ 382 struct stab_info stab_info; 383 384 /* Used by eh_frame code when editing .eh_frame. */ 385 struct eh_frame_hdr_info eh_info; 386 387 /* A linked list of local symbols to be added to .dynsym. */ 388 struct elf_link_local_dynamic_entry *dynlocal; 389 390 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic 391 objects included in the link. */ 392 struct bfd_link_needed_list *runpath; 393 394 /* Cached first output tls section and size of PT_TLS segment. */ 395 asection *tls_sec; 396 bfd_size_type tls_size; 397 398 /* A linked list of BFD's loaded in the link. */ 399 struct elf_link_loaded_list *loaded; 400}; 401 402/* Look up an entry in an ELF linker hash table. */ 403 404#define elf_link_hash_lookup(table, string, create, copy, follow) \ 405 ((struct elf_link_hash_entry *) \ 406 bfd_link_hash_lookup (&(table)->root, (string), (create), \ 407 (copy), (follow))) 408 409/* Traverse an ELF linker hash table. */ 410 411#define elf_link_hash_traverse(table, func, info) \ 412 (bfd_link_hash_traverse \ 413 (&(table)->root, \ 414 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 415 (info))) 416 417/* Get the ELF linker hash table from a link_info structure. */ 418 419#define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) 420 421/* Returns TRUE if the hash table is a struct elf_link_hash_table. */ 422#define is_elf_hash_table(htab) \ 423 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) 424 425/* Used by bfd_section_from_r_symndx to cache a small number of local 426 symbol to section mappings. */ 427#define LOCAL_SYM_CACHE_SIZE 32 428struct sym_sec_cache 429{ 430 bfd *abfd; 431 unsigned long indx[LOCAL_SYM_CACHE_SIZE]; 432 asection *sec[LOCAL_SYM_CACHE_SIZE]; 433}; 434 435/* Constant information held for an ELF backend. */ 436 437struct elf_size_info { 438 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; 439 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; 440 441 /* The size of entries in the .hash section. */ 442 unsigned char sizeof_hash_entry; 443 444 /* The number of internal relocations to allocate per external 445 relocation entry. */ 446 unsigned char int_rels_per_ext_rel; 447 /* We use some fixed size arrays. This should be large enough to 448 handle all back-ends. */ 449#define MAX_INT_RELS_PER_EXT_REL 3 450 451 unsigned char arch_size, log_file_align; 452 unsigned char elfclass, ev_current; 453 int (*write_out_phdrs) 454 (bfd *, const Elf_Internal_Phdr *, unsigned int); 455 bfd_boolean 456 (*write_shdrs_and_ehdr) (bfd *); 457 void (*write_relocs) 458 (bfd *, asection *, void *); 459 void (*swap_symbol_in) 460 (bfd *, const void *, const void *, Elf_Internal_Sym *); 461 void (*swap_symbol_out) 462 (bfd *, const Elf_Internal_Sym *, void *, void *); 463 bfd_boolean (*slurp_reloc_table) 464 (bfd *, asection *, asymbol **, bfd_boolean); 465 long (*slurp_symbol_table) 466 (bfd *, asymbol **, bfd_boolean); 467 void (*swap_dyn_in) 468 (bfd *, const void *, Elf_Internal_Dyn *); 469 void (*swap_dyn_out) 470 (bfd *, const Elf_Internal_Dyn *, void *); 471 472 /* This function is called to swap in a REL relocation. If an 473 external relocation corresponds to more than one internal 474 relocation, then all relocations are swapped in at once. */ 475 void (*swap_reloc_in) 476 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 477 478 /* This function is called to swap out a REL relocation. */ 479 void (*swap_reloc_out) 480 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 481 482 /* This function is called to swap in a RELA relocation. If an 483 external relocation corresponds to more than one internal 484 relocation, then all relocations are swapped in at once. */ 485 void (*swap_reloca_in) 486 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 487 488 /* This function is called to swap out a RELA relocation. */ 489 void (*swap_reloca_out) 490 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 491}; 492 493#define elf_symbol_from(ABFD,S) \ 494 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ 495 && (S)->the_bfd->tdata.elf_obj_data != 0) \ 496 ? (elf_symbol_type *) (S) \ 497 : 0) 498 499enum elf_reloc_type_class { 500 reloc_class_normal, 501 reloc_class_relative, 502 reloc_class_plt, 503 reloc_class_copy 504}; 505 506struct elf_reloc_cookie 507{ 508 Elf_Internal_Rela *rels, *rel, *relend; 509 Elf_Internal_Sym *locsyms; 510 bfd *abfd; 511 size_t locsymcount; 512 size_t extsymoff; 513 struct elf_link_hash_entry **sym_hashes; 514 int r_sym_shift; 515 bfd_boolean bad_symtab; 516}; 517 518/* The level of IRIX compatibility we're striving for. */ 519 520typedef enum { 521 ict_none, 522 ict_irix5, 523 ict_irix6 524} irix_compat_t; 525 526/* Mapping of ELF section names and types. */ 527struct bfd_elf_special_section 528{ 529 const char *prefix; 530 int prefix_length; 531 /* 0 means name must match PREFIX exactly. 532 -1 means name must start with PREFIX followed by an arbitrary string. 533 -2 means name must match PREFIX exactly or consist of PREFIX followed 534 by a dot then anything. 535 > 0 means name must start with the first PREFIX_LENGTH chars of 536 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ 537 int suffix_length; 538 int type; 539 int attr; 540}; 541 542struct elf_backend_data 543{ 544 /* The architecture for this backend. */ 545 enum bfd_architecture arch; 546 547 /* The ELF machine code (EM_xxxx) for this backend. */ 548 int elf_machine_code; 549 550 /* The maximum page size for this backend. */ 551 bfd_vma maxpagesize; 552 553 /* The BFD flags applied to sections created for dynamic linking. */ 554 flagword dynamic_sec_flags; 555 556 /* A function to translate an ELF RELA relocation to a BFD arelent 557 structure. */ 558 void (*elf_info_to_howto) 559 (bfd *, arelent *, Elf_Internal_Rela *); 560 561 /* A function to translate an ELF REL relocation to a BFD arelent 562 structure. */ 563 void (*elf_info_to_howto_rel) 564 (bfd *, arelent *, Elf_Internal_Rela *); 565 566 /* A function to determine whether a symbol is global when 567 partitioning the symbol table into local and global symbols. 568 This should be NULL for most targets, in which case the correct 569 thing will be done. MIPS ELF, at least on the Irix 5, has 570 special requirements. */ 571 bfd_boolean (*elf_backend_sym_is_global) 572 (bfd *, asymbol *); 573 574 /* The remaining functions are hooks which are called only if they 575 are not NULL. */ 576 577 /* A function to permit a backend specific check on whether a 578 particular BFD format is relevant for an object file, and to 579 permit the backend to set any global information it wishes. When 580 this is called elf_elfheader is set, but anything else should be 581 used with caution. If this returns FALSE, the check_format 582 routine will return a bfd_error_wrong_format error. */ 583 bfd_boolean (*elf_backend_object_p) 584 (bfd *); 585 586 /* A function to do additional symbol processing when reading the 587 ELF symbol table. This is where any processor-specific special 588 section indices are handled. */ 589 void (*elf_backend_symbol_processing) 590 (bfd *, asymbol *); 591 592 /* A function to do additional symbol processing after reading the 593 entire ELF symbol table. */ 594 bfd_boolean (*elf_backend_symbol_table_processing) 595 (bfd *, elf_symbol_type *, unsigned int); 596 597 /* A function to set the type of the info field. Processor-specific 598 types should be handled here. */ 599 int (*elf_backend_get_symbol_type) 600 (Elf_Internal_Sym *, int); 601 602 /* A function to return the linker hash table entry of a symbol that 603 might be satisfied by an archive symbol. */ 604 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup) 605 (bfd *, struct bfd_link_info *, const char *); 606 607 /* Return true if local section symbols should have a non-null st_name. 608 NULL implies false. */ 609 bfd_boolean (*elf_backend_name_local_section_symbols) 610 (bfd *); 611 612 /* A function to do additional processing on the ELF section header 613 just before writing it out. This is used to set the flags and 614 type fields for some sections, or to actually write out data for 615 unusual sections. */ 616 bfd_boolean (*elf_backend_section_processing) 617 (bfd *, Elf_Internal_Shdr *); 618 619 /* A function to handle unusual section types when creating BFD 620 sections from ELF sections. */ 621 bfd_boolean (*elf_backend_section_from_shdr) 622 (bfd *, Elf_Internal_Shdr *, const char *); 623 624 /* A function to convert machine dependent section header flags to 625 BFD internal section header flags. */ 626 bfd_boolean (*elf_backend_section_flags) 627 (flagword *, const Elf_Internal_Shdr *); 628 629 /* A function to handle unusual program segment types when creating BFD 630 sections from ELF program segments. */ 631 bfd_boolean (*elf_backend_section_from_phdr) 632 (bfd *, Elf_Internal_Phdr *, int); 633 634 /* A function to set up the ELF section header for a BFD section in 635 preparation for writing it out. This is where the flags and type 636 fields are set for unusual sections. */ 637 bfd_boolean (*elf_backend_fake_sections) 638 (bfd *, Elf_Internal_Shdr *, asection *); 639 640 /* A function to get the ELF section index for a BFD section. If 641 this returns TRUE, the section was found. If it is a normal ELF 642 section, *RETVAL should be left unchanged. If it is not a normal 643 ELF section *RETVAL should be set to the SHN_xxxx index. */ 644 bfd_boolean (*elf_backend_section_from_bfd_section) 645 (bfd *, asection *, int *retval); 646 647 /* If this field is not NULL, it is called by the add_symbols phase 648 of a link just before adding a symbol to the global linker hash 649 table. It may modify any of the fields as it wishes. If *NAME 650 is set to NULL, the symbol will be skipped rather than being 651 added to the hash table. This function is responsible for 652 handling all processor dependent symbol bindings and section 653 indices, and must set at least *FLAGS and *SEC for each processor 654 dependent case; failure to do so will cause a link error. */ 655 bfd_boolean (*elf_add_symbol_hook) 656 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *, 657 const char **name, flagword *flags, asection **sec, bfd_vma *value); 658 659 /* If this field is not NULL, it is called by the elf_link_output_sym 660 phase of a link for each symbol which will appear in the object file. */ 661 bfd_boolean (*elf_backend_link_output_symbol_hook) 662 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *, 663 asection *, struct elf_link_hash_entry *); 664 665 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend 666 linker the first time it encounters a dynamic object in the link. 667 This function must create any sections required for dynamic 668 linking. The ABFD argument is a dynamic object. The .interp, 669 .dynamic, .dynsym, .dynstr, and .hash functions have already been 670 created, and this function may modify the section flags if 671 desired. This function will normally create the .got and .plt 672 sections, but different backends have different requirements. */ 673 bfd_boolean (*elf_backend_create_dynamic_sections) 674 (bfd *abfd, struct bfd_link_info *info); 675 676 /* When creating a shared library, determine whether to omit the 677 dynamic symbol for the section. */ 678 bfd_boolean (*elf_backend_omit_section_dynsym) 679 (bfd *output_bfd, struct bfd_link_info *info, asection *osec); 680 681 /* The CHECK_RELOCS function is called by the add_symbols phase of 682 the ELF backend linker. It is called once for each section with 683 relocs of an object file, just after the symbols for the object 684 file have been added to the global linker hash table. The 685 function must look through the relocs and do any special handling 686 required. This generally means allocating space in the global 687 offset table, and perhaps allocating space for a reloc. The 688 relocs are always passed as Rela structures; if the section 689 actually uses Rel structures, the r_addend field will always be 690 zero. */ 691 bfd_boolean (*check_relocs) 692 (bfd *abfd, struct bfd_link_info *info, asection *o, 693 const Elf_Internal_Rela *relocs); 694 695 /* The CHECK_DIRECTIVES function is called once per input file by 696 the add_symbols phase of the ELF backend linker. The function 697 must inspect the bfd and create any additional symbols according 698 to any custom directives in the bfd. */ 699 bfd_boolean (*check_directives) 700 (bfd *abfd, struct bfd_link_info *info); 701 702 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend 703 linker for every symbol which is defined by a dynamic object and 704 referenced by a regular object. This is called after all the 705 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS 706 function has been called. The hash table entry should be 707 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be 708 defined in a section from a dynamic object. Dynamic object 709 sections are not included in the final link, and this function is 710 responsible for changing the value to something which the rest of 711 the link can deal with. This will normally involve adding an 712 entry to the .plt or .got or some such section, and setting the 713 symbol to point to that. */ 714 bfd_boolean (*elf_backend_adjust_dynamic_symbol) 715 (struct bfd_link_info *info, struct elf_link_hash_entry *h); 716 717 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker 718 after all the linker input files have been seen but before the 719 section sizes have been set. This is called after 720 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */ 721 bfd_boolean (*elf_backend_always_size_sections) 722 (bfd *output_bfd, struct bfd_link_info *info); 723 724 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend 725 linker after all the linker input files have been seen but before 726 the sections sizes have been set. This is called after 727 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols. 728 It is only called when linking against a dynamic object. It must 729 set the sizes of the dynamic sections, and may fill in their 730 contents as well. The generic ELF linker can handle the .dynsym, 731 .dynstr and .hash sections. This function must handle the 732 .interp section and any sections created by the 733 CREATE_DYNAMIC_SECTIONS entry point. */ 734 bfd_boolean (*elf_backend_size_dynamic_sections) 735 (bfd *output_bfd, struct bfd_link_info *info); 736 737 /* The RELOCATE_SECTION function is called by the ELF backend linker 738 to handle the relocations for a section. 739 740 The relocs are always passed as Rela structures; if the section 741 actually uses Rel structures, the r_addend field will always be 742 zero. 743 744 This function is responsible for adjust the section contents as 745 necessary, and (if using Rela relocs and generating a 746 relocatable output file) adjusting the reloc addend as 747 necessary. 748 749 This function does not have to worry about setting the reloc 750 address or the reloc symbol index. 751 752 LOCAL_SYMS is a pointer to the swapped in local symbols. 753 754 LOCAL_SECTIONS is an array giving the section in the input file 755 corresponding to the st_shndx field of each local symbol. 756 757 The global hash table entry for the global symbols can be found 758 via elf_sym_hashes (input_bfd). 759 760 When generating relocatable output, this function must handle 761 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 762 going to be the section symbol corresponding to the output 763 section, which means that the addend must be adjusted 764 accordingly. */ 765 bfd_boolean (*elf_backend_relocate_section) 766 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd, 767 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs, 768 Elf_Internal_Sym *local_syms, asection **local_sections); 769 770 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend 771 linker just before it writes a symbol out to the .dynsym section. 772 The processor backend may make any required adjustment to the 773 symbol. It may also take the opportunity to set contents of the 774 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on 775 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called 776 on those symbols which are defined by a dynamic object. */ 777 bfd_boolean (*elf_backend_finish_dynamic_symbol) 778 (bfd *output_bfd, struct bfd_link_info *info, 779 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym); 780 781 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend 782 linker just before it writes all the dynamic sections out to the 783 output file. The FINISH_DYNAMIC_SYMBOL will have been called on 784 all dynamic symbols. */ 785 bfd_boolean (*elf_backend_finish_dynamic_sections) 786 (bfd *output_bfd, struct bfd_link_info *info); 787 788 /* A function to do any beginning processing needed for the ELF file 789 before building the ELF headers and computing file positions. */ 790 void (*elf_backend_begin_write_processing) 791 (bfd *, struct bfd_link_info *); 792 793 /* A function to do any final processing needed for the ELF file 794 before writing it out. The LINKER argument is TRUE if this BFD 795 was created by the ELF backend linker. */ 796 void (*elf_backend_final_write_processing) 797 (bfd *, bfd_boolean linker); 798 799 /* This function is called by get_program_header_size. It should 800 return the number of additional program segments which this BFD 801 will need. It should return -1 on error. */ 802 int (*elf_backend_additional_program_headers) 803 (bfd *); 804 805 /* This function is called to modify an existing segment map in a 806 backend specific fashion. */ 807 bfd_boolean (*elf_backend_modify_segment_map) 808 (bfd *, struct bfd_link_info *); 809 810 /* This function is called during section gc to discover the section a 811 particular relocation refers to. */ 812 asection * (*gc_mark_hook) 813 (asection *sec, struct bfd_link_info *, Elf_Internal_Rela *, 814 struct elf_link_hash_entry *h, Elf_Internal_Sym *); 815 816 /* This function, if defined, is called during the sweep phase of gc 817 in order that a backend might update any data structures it might 818 be maintaining. */ 819 bfd_boolean (*gc_sweep_hook) 820 (bfd *abfd, struct bfd_link_info *info, asection *o, 821 const Elf_Internal_Rela *relocs); 822 823 /* This function, if defined, is called after the ELF headers have 824 been created. This allows for things like the OS and ABI versions 825 to be changed. */ 826 void (*elf_backend_post_process_headers) 827 (bfd *, struct bfd_link_info *); 828 829 /* This function, if defined, prints a symbol to file and returns the 830 name of the symbol to be printed. It should return NULL to fall 831 back to default symbol printing. */ 832 const char *(*elf_backend_print_symbol_all) 833 (bfd *, void *, asymbol *); 834 835 /* This function, if defined, is called after all local symbols and 836 global symbols converted to locals are emitted into the symtab 837 section. It allows the backend to emit special global symbols 838 not handled in the hash table. */ 839 bfd_boolean (*elf_backend_output_arch_syms) 840 (bfd *, struct bfd_link_info *, void *, 841 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 842 struct elf_link_hash_entry *)); 843 844 /* Copy any information related to dynamic linking from a pre-existing 845 symbol to a newly created symbol. Also called to copy flags and 846 other back-end info to a weakdef, in which case the symbol is not 847 newly created and plt/got refcounts and dynamic indices should not 848 be copied. */ 849 void (*elf_backend_copy_indirect_symbol) 850 (const struct elf_backend_data *, struct elf_link_hash_entry *, 851 struct elf_link_hash_entry *); 852 853 /* Modify any information related to dynamic linking such that the 854 symbol is not exported. */ 855 void (*elf_backend_hide_symbol) 856 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 857 858 /* Merge the backend specific symbol attribute. */ 859 void (*elf_backend_merge_symbol_attribute) 860 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, 861 bfd_boolean); 862 863 /* Emit relocations. Overrides default routine for emitting relocs, 864 except during a relocatable link, or if all relocs are being emitted. */ 865 bfd_boolean (*elf_backend_emit_relocs) 866 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *); 867 868 /* Count relocations. Not called for relocatable links 869 or if all relocs are being preserved in the output. */ 870 unsigned int (*elf_backend_count_relocs) 871 (asection *, Elf_Internal_Rela *); 872 873 /* This function, if defined, is called when an NT_PRSTATUS note is found 874 in a core file. */ 875 bfd_boolean (*elf_backend_grok_prstatus) 876 (bfd *, Elf_Internal_Note *); 877 878 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO 879 note is found in a core file. */ 880 bfd_boolean (*elf_backend_grok_psinfo) 881 (bfd *, Elf_Internal_Note *); 882 883 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */ 884 void (* elf_backend_sprintf_vma) 885 (bfd *, char *, bfd_vma); 886 void (* elf_backend_fprintf_vma) 887 (bfd *, void *, bfd_vma); 888 889 /* This function returns class of a reloc type. */ 890 enum elf_reloc_type_class (*elf_backend_reloc_type_class) 891 (const Elf_Internal_Rela *); 892 893 /* This function, if defined, removes information about discarded functions 894 from other sections which mention them. */ 895 bfd_boolean (*elf_backend_discard_info) 896 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 897 898 /* This function, if defined, signals that the function above has removed 899 the discarded relocations for this section. */ 900 bfd_boolean (*elf_backend_ignore_discarded_relocs) 901 (asection *); 902 903 /* These functions tell elf-eh-frame whether to attempt to turn 904 absolute or lsda encodings into pc-relative ones. The default 905 definition enables these transformations. */ 906 bfd_boolean (*elf_backend_can_make_relative_eh_frame) 907 (bfd *, struct bfd_link_info *, asection *); 908 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) 909 (bfd *, struct bfd_link_info *, asection *); 910 911 /* This function returns an encoding after computing the encoded 912 value (and storing it in ENCODED) for the given OFFSET into OSEC, 913 to be stored in at LOC_OFFSET into the LOC_SEC input section. 914 The default definition chooses a 32-bit PC-relative encoding. */ 915 bfd_byte (*elf_backend_encode_eh_address) 916 (bfd *abfd, struct bfd_link_info *info, 917 asection *osec, bfd_vma offset, 918 asection *loc_sec, bfd_vma loc_offset, 919 bfd_vma *encoded); 920 921 /* This function, if defined, may write out the given section. 922 Returns TRUE if it did so and FALSE if the caller should. */ 923 bfd_boolean (*elf_backend_write_section) 924 (bfd *, asection *, bfd_byte *); 925 926 /* The level of IRIX compatibility we're striving for. 927 MIPS ELF specific function. */ 928 irix_compat_t (*elf_backend_mips_irix_compat) 929 (bfd *); 930 931 reloc_howto_type *(*elf_backend_mips_rtype_to_howto) 932 (unsigned int, bfd_boolean); 933 934 /* The swapping table to use when dealing with ECOFF information. 935 Used for the MIPS ELF .mdebug section. */ 936 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; 937 938 /* This function implements `bfd_elf_bfd_from_remote_memory'; 939 see elf.c, elfcode.h. */ 940 bfd *(*elf_backend_bfd_from_remote_memory) 941 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 942 int (*target_read_memory) (bfd_vma vma, char *myaddr, int len)); 943 944 /* This function is used by `_bfd_elf_get_synthetic_symtab'; 945 see elf.c. */ 946 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); 947 948 /* Used to handle bad SHF_LINK_ORDER input. */ 949 bfd_error_handler_type link_order_error_handler; 950 951 /* Name of the PLT relocation section. */ 952 const char *relplt_name; 953 954 /* Alternate EM_xxxx machine codes for this backend. */ 955 int elf_machine_alt1; 956 int elf_machine_alt2; 957 958 const struct elf_size_info *s; 959 960 /* An array of target specific special section map. */ 961 const struct bfd_elf_special_section *special_sections; 962 963 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the 964 .got section */ 965 bfd_vma got_symbol_offset; 966 967 /* The size in bytes of the header for the GOT. This includes the 968 so-called reserved entries on some systems. */ 969 bfd_vma got_header_size; 970 971 /* This is TRUE if the linker should act like collect and gather 972 global constructors and destructors by name. This is TRUE for 973 MIPS ELF because the Irix 5 tools can not handle the .init 974 section. */ 975 unsigned collect : 1; 976 977 /* This is TRUE if the linker should ignore changes to the type of a 978 symbol. This is TRUE for MIPS ELF because some Irix 5 objects 979 record undefined functions as STT_OBJECT although the definitions 980 are STT_FUNC. */ 981 unsigned type_change_ok : 1; 982 983 /* Whether the backend may use REL relocations. (Some backends use 984 both REL and RELA relocations, and this flag is set for those 985 backends.) */ 986 unsigned may_use_rel_p : 1; 987 988 /* Whether the backend may use RELA relocations. (Some backends use 989 both REL and RELA relocations, and this flag is set for those 990 backends.) */ 991 unsigned may_use_rela_p : 1; 992 993 /* Whether the default relocation type is RELA. If a backend with 994 this flag set wants REL relocations for a particular section, 995 it must note that explicitly. Similarly, if this flag is clear, 996 and the backend wants RELA relocations for a particular 997 section. */ 998 unsigned default_use_rela_p : 1; 999 1000 /* Set if RELA relocations for a relocatable link can be handled by 1001 generic code. Backends that set this flag need do nothing in the 1002 backend relocate_section routine for relocatable linking. */ 1003 unsigned rela_normal : 1; 1004 1005 /* TRUE if addresses "naturally" sign extend. This is used when 1006 swapping in from Elf32 when BFD64. */ 1007 unsigned sign_extend_vma : 1; 1008 1009 unsigned want_got_plt : 1; 1010 unsigned plt_readonly : 1; 1011 unsigned want_plt_sym : 1; 1012 unsigned plt_not_loaded : 1; 1013 unsigned plt_alignment : 4; 1014 unsigned can_gc_sections : 1; 1015 unsigned can_refcount : 1; 1016 unsigned want_got_sym : 1; 1017 unsigned want_dynbss : 1; 1018 /* Targets which do not support physical addressing often require 1019 that the p_paddr field in the section header to be set to zero. 1020 This field indicates whether this behavior is required. */ 1021 unsigned want_p_paddr_set_to_zero : 1; 1022}; 1023 1024/* Information stored for each BFD section in an ELF file. This 1025 structure is allocated by elf_new_section_hook. */ 1026 1027struct bfd_elf_section_data 1028{ 1029 /* The ELF header for this section. */ 1030 Elf_Internal_Shdr this_hdr; 1031 1032 /* The ELF header for the reloc section associated with this 1033 section, if any. */ 1034 Elf_Internal_Shdr rel_hdr; 1035 1036 /* If there is a second reloc section associated with this section, 1037 as can happen on Irix 6, this field points to the header. */ 1038 Elf_Internal_Shdr *rel_hdr2; 1039 1040 /* The number of relocations currently assigned to REL_HDR. */ 1041 unsigned int rel_count; 1042 1043 /* The number of relocations currently assigned to REL_HDR2. */ 1044 unsigned int rel_count2; 1045 1046 /* The ELF section number of this section. Only used for an output 1047 file. */ 1048 int this_idx; 1049 1050 /* The ELF section number of the reloc section indicated by 1051 REL_HDR if any. Only used for an output file. */ 1052 int rel_idx; 1053 1054 /* The ELF section number of the reloc section indicated by 1055 REL_HDR2 if any. Only used for an output file. */ 1056 int rel_idx2; 1057 1058 /* Used by the backend linker when generating a shared library to 1059 record the dynamic symbol index for a section symbol 1060 corresponding to this section. A value of 0 means that there is 1061 no dynamic symbol for this section. */ 1062 int dynindx; 1063 1064 /* A pointer to the linked-to section for SHF_LINK_ORDER. */ 1065 asection *linked_to; 1066 1067 /* Used by the backend linker to store the symbol hash table entries 1068 associated with relocs against global symbols. */ 1069 struct elf_link_hash_entry **rel_hashes; 1070 1071 /* A pointer to the swapped relocs. If the section uses REL relocs, 1072 rather than RELA, all the r_addend fields will be zero. This 1073 pointer may be NULL. It is used by the backend linker. */ 1074 Elf_Internal_Rela *relocs; 1075 1076 /* A pointer to a linked list tracking dynamic relocs copied for 1077 local symbols. */ 1078 void *local_dynrel; 1079 1080 /* A pointer to the bfd section used for dynamic relocs. */ 1081 asection *sreloc; 1082 1083 union { 1084 /* Group name, if this section is a member of a group. */ 1085 const char *name; 1086 1087 /* Group signature sym, if this is the SHT_GROUP section. */ 1088 struct bfd_symbol *id; 1089 } group; 1090 1091 /* Optional information about section group; NULL if it doesn't 1092 belongs to any section group. */ 1093 asection *sec_group; 1094 1095 /* A linked list of sections in the group. Circular when used by 1096 the linker. */ 1097 asection *next_in_group; 1098 1099 /* A pointer used for various section optimizations. */ 1100 void *sec_info; 1101}; 1102 1103#define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd) 1104#define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) 1105#define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) 1106#define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) 1107#define elf_group_name(sec) (elf_section_data(sec)->group.name) 1108#define elf_group_id(sec) (elf_section_data(sec)->group.id) 1109#define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) 1110#define elf_sec_group(sec) (elf_section_data(sec)->sec_group) 1111 1112/* Return TRUE if section has been discarded. */ 1113#define elf_discarded_section(sec) \ 1114 (!bfd_is_abs_section (sec) \ 1115 && bfd_is_abs_section ((sec)->output_section) \ 1116 && (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \ 1117 && (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS) 1118 1119#define get_elf_backend_data(abfd) \ 1120 ((const struct elf_backend_data *) (abfd)->xvec->backend_data) 1121 1122/* This struct is used to pass information to routines called via 1123 elf_link_hash_traverse which must return failure. */ 1124 1125struct elf_info_failed 1126{ 1127 bfd_boolean failed; 1128 struct bfd_link_info *info; 1129 struct bfd_elf_version_tree *verdefs; 1130}; 1131 1132/* This structure is used to pass information to 1133 _bfd_elf_link_assign_sym_version. */ 1134 1135struct elf_assign_sym_version_info 1136{ 1137 /* Output BFD. */ 1138 bfd *output_bfd; 1139 /* General link information. */ 1140 struct bfd_link_info *info; 1141 /* Version tree. */ 1142 struct bfd_elf_version_tree *verdefs; 1143 /* Whether we had a failure. */ 1144 bfd_boolean failed; 1145}; 1146 1147/* This structure is used to pass information to 1148 _bfd_elf_link_find_version_dependencies. */ 1149 1150struct elf_find_verdep_info 1151{ 1152 /* Output BFD. */ 1153 bfd *output_bfd; 1154 /* General link information. */ 1155 struct bfd_link_info *info; 1156 /* The number of dependencies. */ 1157 unsigned int vers; 1158 /* Whether we had a failure. */ 1159 bfd_boolean failed; 1160}; 1161 1162/* Some private data is stashed away for future use using the tdata pointer 1163 in the bfd structure. */ 1164 1165struct elf_obj_tdata 1166{ 1167 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ 1168 Elf_Internal_Shdr **elf_sect_ptr; 1169 Elf_Internal_Phdr *phdr; 1170 struct elf_segment_map *segment_map; 1171 struct elf_strtab_hash *strtab_ptr; 1172 int num_locals; 1173 int num_globals; 1174 unsigned int num_elf_sections; /* elf_sect_ptr size */ 1175 int num_section_syms; 1176 asymbol **section_syms; /* STT_SECTION symbols for each section */ 1177 Elf_Internal_Shdr symtab_hdr; 1178 Elf_Internal_Shdr shstrtab_hdr; 1179 Elf_Internal_Shdr strtab_hdr; 1180 Elf_Internal_Shdr dynsymtab_hdr; 1181 Elf_Internal_Shdr dynstrtab_hdr; 1182 Elf_Internal_Shdr dynversym_hdr; 1183 Elf_Internal_Shdr dynverref_hdr; 1184 Elf_Internal_Shdr dynverdef_hdr; 1185 Elf_Internal_Shdr symtab_shndx_hdr; 1186 unsigned int symtab_section, shstrtab_section; 1187 unsigned int strtab_section, dynsymtab_section; 1188 unsigned int symtab_shndx_section; 1189 unsigned int dynversym_section, dynverdef_section, dynverref_section; 1190 file_ptr next_file_pos; 1191 bfd_vma gp; /* The gp value */ 1192 unsigned int gp_size; /* The gp size */ 1193 1194 /* Information grabbed from an elf core file. */ 1195 int core_signal; 1196 int core_pid; 1197 int core_lwpid; 1198 char* core_program; 1199 char* core_command; 1200 1201 /* A mapping from external symbols to entries in the linker hash 1202 table, used when linking. This is indexed by the symbol index 1203 minus the sh_info field of the symbol table header. */ 1204 struct elf_link_hash_entry **sym_hashes; 1205 1206 /* Track usage and final offsets of GOT entries for local symbols. 1207 This array is indexed by symbol index. Elements are used 1208 identically to "got" in struct elf_link_hash_entry. */ 1209 union 1210 { 1211 bfd_signed_vma *refcounts; 1212 bfd_vma *offsets; 1213 struct got_entry **ents; 1214 } local_got; 1215 1216 /* The linker ELF emulation code needs to let the backend ELF linker 1217 know what filename should be used for a dynamic object if the 1218 dynamic object is found using a search. The emulation code then 1219 sometimes needs to know what name was actually used. Until the 1220 file has been added to the linker symbol table, this field holds 1221 the name the linker wants. After it has been added, it holds the 1222 name actually used, which will be the DT_SONAME entry if there is 1223 one. */ 1224 const char *dt_name; 1225 1226 /* Records the result of `get_program_header_size'. */ 1227 bfd_size_type program_header_size; 1228 1229 /* Used by find_nearest_line entry point. */ 1230 void *line_info; 1231 1232 /* Used by MIPS ELF find_nearest_line entry point. The structure 1233 could be included directly in this one, but there's no point to 1234 wasting the memory just for the infrequently called 1235 find_nearest_line. */ 1236 struct mips_elf_find_line *find_line_info; 1237 1238 /* A place to stash dwarf1 info for this bfd. */ 1239 struct dwarf1_debug *dwarf1_find_line_info; 1240 1241 /* A place to stash dwarf2 info for this bfd. */ 1242 void *dwarf2_find_line_info; 1243 1244 /* An array of stub sections indexed by symbol number, used by the 1245 MIPS ELF linker. FIXME: We should figure out some way to only 1246 include this field for a MIPS ELF target. */ 1247 asection **local_stubs; 1248 1249 /* Used to determine if PT_GNU_EH_FRAME segment header should be 1250 created. */ 1251 asection *eh_frame_hdr; 1252 1253 Elf_Internal_Shdr **group_sect_ptr; 1254 int num_group; 1255 1256 /* Number of symbol version definitions we are about to emit. */ 1257 unsigned int cverdefs; 1258 1259 /* Number of symbol version references we are about to emit. */ 1260 unsigned int cverrefs; 1261 1262 /* Segment flags for the PT_GNU_STACK segment. */ 1263 unsigned int stack_flags; 1264 1265 /* Should the PT_GNU_RELRO segment be emitted? */ 1266 bfd_boolean relro; 1267 1268 /* Symbol version definitions in external objects. */ 1269 Elf_Internal_Verdef *verdef; 1270 1271 /* Symbol version references to external objects. */ 1272 Elf_Internal_Verneed *verref; 1273 1274 /* The Irix 5 support uses two virtual sections, which represent 1275 text/data symbols defined in dynamic objects. */ 1276 asymbol *elf_data_symbol; 1277 asymbol *elf_text_symbol; 1278 asection *elf_data_section; 1279 asection *elf_text_section; 1280 1281 /* Whether a dyanmic object was specified normally on the linker 1282 command line, or was specified when --as-needed was in effect, 1283 or was found via a DT_NEEDED entry. */ 1284 enum dynamic_lib_link_class dyn_lib_class; 1285 1286 /* This is set to TRUE if the object was created by the backend 1287 linker. */ 1288 bfd_boolean linker; 1289 1290 /* Irix 5 often screws up the symbol table, sorting local symbols 1291 after global symbols. This flag is set if the symbol table in 1292 this BFD appears to be screwed up. If it is, we ignore the 1293 sh_info field in the symbol table header, and always read all the 1294 symbols. */ 1295 bfd_boolean bad_symtab; 1296 1297 /* Used to determine if the e_flags field has been initialized */ 1298 bfd_boolean flags_init; 1299}; 1300 1301#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) 1302#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) 1303#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) 1304#define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) 1305#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) 1306#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) 1307#define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) 1308#define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) 1309#define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section) 1310#define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section) 1311#define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section) 1312#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals) 1313#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) 1314#define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) 1315#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms) 1316#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) 1317#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) 1318#define elf_gp(bfd) (elf_tdata(bfd) -> gp) 1319#define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) 1320#define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) 1321#define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) 1322#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) 1323#define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) 1324#define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) 1325#define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) 1326#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) 1327#define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init) 1328 1329extern void _bfd_elf_swap_verdef_in 1330 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); 1331extern void _bfd_elf_swap_verdef_out 1332 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); 1333extern void _bfd_elf_swap_verdaux_in 1334 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); 1335extern void _bfd_elf_swap_verdaux_out 1336 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); 1337extern void _bfd_elf_swap_verneed_in 1338 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); 1339extern void _bfd_elf_swap_verneed_out 1340 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); 1341extern void _bfd_elf_swap_vernaux_in 1342 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); 1343extern void _bfd_elf_swap_vernaux_out 1344 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); 1345extern void _bfd_elf_swap_versym_in 1346 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); 1347extern void _bfd_elf_swap_versym_out 1348 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); 1349 1350extern int _bfd_elf_section_from_bfd_section 1351 (bfd *, asection *); 1352extern char *bfd_elf_string_from_elf_section 1353 (bfd *, unsigned, unsigned); 1354extern char *bfd_elf_get_str_section 1355 (bfd *, unsigned); 1356extern Elf_Internal_Sym *bfd_elf_get_elf_syms 1357 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, 1358 Elf_External_Sym_Shndx *); 1359extern const char *bfd_elf_local_sym_name 1360 (bfd *, Elf_Internal_Sym *); 1361 1362extern bfd_boolean _bfd_elf_copy_private_bfd_data 1363 (bfd *, bfd *); 1364extern bfd_boolean _bfd_elf_print_private_bfd_data 1365 (bfd *, void *); 1366extern void bfd_elf_print_symbol 1367 (bfd *, void *, asymbol *, bfd_print_symbol_type); 1368 1369#define elf_string_from_elf_strtab(abfd, strindex) \ 1370 bfd_elf_string_from_elf_section (abfd, elf_elfheader(abfd)->e_shstrndx, \ 1371 strindex) 1372 1373extern void _bfd_elf_sprintf_vma 1374 (bfd *, char *, bfd_vma); 1375extern void _bfd_elf_fprintf_vma 1376 (bfd *, void *, bfd_vma); 1377 1378extern bfd_byte _bfd_elf_encode_eh_address 1379 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, 1380 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); 1381extern bfd_boolean _bfd_elf_can_make_relative 1382 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); 1383 1384extern enum elf_reloc_type_class _bfd_elf_reloc_type_class 1385 (const Elf_Internal_Rela *); 1386extern bfd_vma _bfd_elf_rela_local_sym 1387 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); 1388extern bfd_vma _bfd_elf_rel_local_sym 1389 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); 1390extern bfd_vma _bfd_elf_section_offset 1391 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1392 1393extern unsigned long bfd_elf_hash 1394 (const char *); 1395 1396extern bfd_reloc_status_type bfd_elf_generic_reloc 1397 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 1398extern bfd_boolean bfd_elf_mkobject 1399 (bfd *); 1400extern bfd_boolean bfd_elf_mkcorefile 1401 (bfd *); 1402extern Elf_Internal_Shdr *bfd_elf_find_section 1403 (bfd *, char *); 1404extern bfd_boolean _bfd_elf_make_section_from_shdr 1405 (bfd *, Elf_Internal_Shdr *, const char *); 1406extern bfd_boolean _bfd_elf_make_section_from_phdr 1407 (bfd *, Elf_Internal_Phdr *, int, const char *); 1408extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc 1409 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 1410extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create 1411 (bfd *); 1412extern void _bfd_elf_link_hash_copy_indirect 1413 (const struct elf_backend_data *, struct elf_link_hash_entry *, 1414 struct elf_link_hash_entry *); 1415extern void _bfd_elf_link_hash_hide_symbol 1416 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1417extern bfd_boolean _bfd_elf_link_hash_table_init 1418 (struct elf_link_hash_table *, bfd *, 1419 struct bfd_hash_entry *(*) 1420 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 1421extern bfd_boolean _bfd_elf_slurp_version_tables 1422 (bfd *); 1423extern bfd_boolean _bfd_elf_merge_sections 1424 (bfd *, struct bfd_link_info *); 1425extern bfd_boolean bfd_elf_is_group_section 1426 (bfd *, const struct bfd_section *); 1427extern bfd_boolean bfd_elf_discard_group 1428 (bfd *, struct bfd_section *); 1429extern void _bfd_elf_section_already_linked 1430 (bfd *, struct bfd_section *); 1431extern void bfd_elf_set_group_contents 1432 (bfd *, asection *, void *); 1433extern void _bfd_elf_link_just_syms 1434 (asection *, struct bfd_link_info *); 1435extern bfd_boolean _bfd_elf_copy_private_header_data 1436 (bfd *, bfd *); 1437extern bfd_boolean _bfd_elf_copy_private_symbol_data 1438 (bfd *, asymbol *, bfd *, asymbol *); 1439extern bfd_boolean _bfd_elf_copy_private_section_data 1440 (bfd *, asection *, bfd *, asection *); 1441extern bfd_boolean _bfd_elf_write_object_contents 1442 (bfd *); 1443extern bfd_boolean _bfd_elf_write_corefile_contents 1444 (bfd *); 1445extern bfd_boolean _bfd_elf_set_section_contents 1446 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 1447extern long _bfd_elf_get_symtab_upper_bound 1448 (bfd *); 1449extern long _bfd_elf_canonicalize_symtab 1450 (bfd *, asymbol **); 1451extern long _bfd_elf_get_dynamic_symtab_upper_bound 1452 (bfd *); 1453extern long _bfd_elf_canonicalize_dynamic_symtab 1454 (bfd *, asymbol **); 1455extern long _bfd_elf_get_synthetic_symtab 1456 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 1457extern long _bfd_elf_get_reloc_upper_bound 1458 (bfd *, sec_ptr); 1459extern long _bfd_elf_canonicalize_reloc 1460 (bfd *, sec_ptr, arelent **, asymbol **); 1461extern long _bfd_elf_get_dynamic_reloc_upper_bound 1462 (bfd *); 1463extern long _bfd_elf_canonicalize_dynamic_reloc 1464 (bfd *, arelent **, asymbol **); 1465extern asymbol *_bfd_elf_make_empty_symbol 1466 (bfd *); 1467extern void _bfd_elf_get_symbol_info 1468 (bfd *, asymbol *, symbol_info *); 1469extern bfd_boolean _bfd_elf_is_local_label_name 1470 (bfd *, const char *); 1471extern alent *_bfd_elf_get_lineno 1472 (bfd *, asymbol *); 1473extern bfd_boolean _bfd_elf_set_arch_mach 1474 (bfd *, enum bfd_architecture, unsigned long); 1475extern bfd_boolean _bfd_elf_find_nearest_line 1476 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1477 unsigned int *); 1478#define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols 1479#define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 1480extern int _bfd_elf_sizeof_headers 1481 (bfd *, bfd_boolean); 1482extern bfd_boolean _bfd_elf_new_section_hook 1483 (bfd *, asection *); 1484extern bfd_boolean _bfd_elf_init_reloc_shdr 1485 (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean); 1486extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr 1487 (bfd *, const char *); 1488 1489/* If the target doesn't have reloc handling written yet: */ 1490extern void _bfd_elf_no_info_to_howto 1491 (bfd *, arelent *, Elf_Internal_Rela *); 1492 1493extern bfd_boolean bfd_section_from_shdr 1494 (bfd *, unsigned int shindex); 1495extern bfd_boolean bfd_section_from_phdr 1496 (bfd *, Elf_Internal_Phdr *, int); 1497 1498extern int _bfd_elf_symbol_from_bfd_symbol 1499 (bfd *, asymbol **); 1500 1501extern asection *bfd_section_from_r_symndx 1502 (bfd *, struct sym_sec_cache *, asection *, unsigned long); 1503extern asection *bfd_section_from_elf_index 1504 (bfd *, unsigned int); 1505extern struct bfd_strtab_hash *_bfd_elf_stringtab_init 1506 (void); 1507 1508extern struct elf_strtab_hash * _bfd_elf_strtab_init 1509 (void); 1510extern void _bfd_elf_strtab_free 1511 (struct elf_strtab_hash *); 1512extern bfd_size_type _bfd_elf_strtab_add 1513 (struct elf_strtab_hash *, const char *, bfd_boolean); 1514extern void _bfd_elf_strtab_addref 1515 (struct elf_strtab_hash *, bfd_size_type); 1516extern void _bfd_elf_strtab_delref 1517 (struct elf_strtab_hash *, bfd_size_type); 1518extern void _bfd_elf_strtab_clear_all_refs 1519 (struct elf_strtab_hash *); 1520extern bfd_size_type _bfd_elf_strtab_size 1521 (struct elf_strtab_hash *); 1522extern bfd_size_type _bfd_elf_strtab_offset 1523 (struct elf_strtab_hash *, bfd_size_type); 1524extern bfd_boolean _bfd_elf_strtab_emit 1525 (bfd *, struct elf_strtab_hash *); 1526extern void _bfd_elf_strtab_finalize 1527 (struct elf_strtab_hash *); 1528 1529extern bfd_boolean _bfd_elf_discard_section_eh_frame 1530 (bfd *, struct bfd_link_info *, asection *, 1531 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); 1532extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr 1533 (bfd *, struct bfd_link_info *); 1534extern bfd_vma _bfd_elf_eh_frame_section_offset 1535 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1536extern bfd_boolean _bfd_elf_write_section_eh_frame 1537 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1538extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr 1539 (bfd *, struct bfd_link_info *); 1540extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr 1541 (struct bfd_link_info *); 1542 1543extern bfd_boolean _bfd_elf_merge_symbol 1544 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, 1545 asection **, bfd_vma *, struct elf_link_hash_entry **, bfd_boolean *, 1546 bfd_boolean *, bfd_boolean *, bfd_boolean *); 1547 1548extern bfd_boolean _bfd_elf_add_default_symbol 1549 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 1550 const char *, Elf_Internal_Sym *, asection **, bfd_vma *, 1551 bfd_boolean *, bfd_boolean); 1552 1553extern bfd_boolean _bfd_elf_export_symbol 1554 (struct elf_link_hash_entry *, void *); 1555 1556extern bfd_boolean _bfd_elf_link_find_version_dependencies 1557 (struct elf_link_hash_entry *, void *); 1558 1559extern bfd_boolean _bfd_elf_link_assign_sym_version 1560 (struct elf_link_hash_entry *, void *); 1561 1562extern long _bfd_elf_link_lookup_local_dynindx 1563 (struct bfd_link_info *, bfd *, long); 1564extern bfd_boolean _bfd_elf_compute_section_file_positions 1565 (bfd *, struct bfd_link_info *); 1566extern void _bfd_elf_assign_file_positions_for_relocs 1567 (bfd *); 1568extern file_ptr _bfd_elf_assign_file_position_for_section 1569 (Elf_Internal_Shdr *, file_ptr, bfd_boolean); 1570 1571extern bfd_boolean _bfd_elf_validate_reloc 1572 (bfd *, arelent *); 1573 1574extern bfd_boolean _bfd_elf_link_create_dynamic_sections 1575 (bfd *, struct bfd_link_info *); 1576extern bfd_boolean _bfd_elf_link_omit_section_dynsym 1577 (bfd *, struct bfd_link_info *, asection *); 1578extern bfd_boolean _bfd_elf_create_dynamic_sections 1579 (bfd *, struct bfd_link_info *); 1580extern bfd_boolean _bfd_elf_create_got_section 1581 (bfd *, struct bfd_link_info *); 1582extern unsigned long _bfd_elf_link_renumber_dynsyms 1583 (bfd *, struct bfd_link_info *); 1584 1585extern bfd_boolean _bfd_elfcore_make_pseudosection 1586 (bfd *, char *, size_t, ufile_ptr); 1587extern char *_bfd_elfcore_strndup 1588 (bfd *, char *, size_t); 1589 1590extern Elf_Internal_Rela *_bfd_elf_link_read_relocs 1591 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); 1592 1593extern bfd_boolean _bfd_elf_link_size_reloc_section 1594 (bfd *, Elf_Internal_Shdr *, asection *); 1595 1596extern bfd_boolean _bfd_elf_link_output_relocs 1597 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *); 1598 1599extern bfd_boolean _bfd_elf_fix_symbol_flags 1600 (struct elf_link_hash_entry *, struct elf_info_failed *); 1601 1602extern bfd_boolean _bfd_elf_adjust_dynamic_symbol 1603 (struct elf_link_hash_entry *, void *); 1604 1605extern bfd_boolean _bfd_elf_link_sec_merge_syms 1606 (struct elf_link_hash_entry *, void *); 1607 1608extern bfd_boolean _bfd_elf_dynamic_symbol_p 1609 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1610 1611extern bfd_boolean _bfd_elf_symbol_refs_local_p 1612 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1613 1614extern bfd_boolean bfd_elf_match_symbols_in_sections 1615 (asection *sec1, asection *sec2); 1616 1617extern bfd_boolean _bfd_elf_setup_group_pointers 1618 (bfd *); 1619 1620extern const bfd_target *bfd_elf32_object_p 1621 (bfd *); 1622extern const bfd_target *bfd_elf32_core_file_p 1623 (bfd *); 1624extern char *bfd_elf32_core_file_failing_command 1625 (bfd *); 1626extern int bfd_elf32_core_file_failing_signal 1627 (bfd *); 1628extern bfd_boolean bfd_elf32_core_file_matches_executable_p 1629 (bfd *, bfd *); 1630 1631extern void bfd_elf32_swap_symbol_in 1632 (bfd *, const void *, const void *, Elf_Internal_Sym *); 1633extern void bfd_elf32_swap_symbol_out 1634 (bfd *, const Elf_Internal_Sym *, void *, void *); 1635extern void bfd_elf32_swap_reloc_in 1636 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1637extern void bfd_elf32_swap_reloc_out 1638 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1639extern void bfd_elf32_swap_reloca_in 1640 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1641extern void bfd_elf32_swap_reloca_out 1642 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1643extern void bfd_elf32_swap_phdr_in 1644 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); 1645extern void bfd_elf32_swap_phdr_out 1646 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); 1647extern void bfd_elf32_swap_dyn_in 1648 (bfd *, const void *, Elf_Internal_Dyn *); 1649extern void bfd_elf32_swap_dyn_out 1650 (bfd *, const Elf_Internal_Dyn *, void *); 1651extern long bfd_elf32_slurp_symbol_table 1652 (bfd *, asymbol **, bfd_boolean); 1653extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr 1654 (bfd *); 1655extern int bfd_elf32_write_out_phdrs 1656 (bfd *, const Elf_Internal_Phdr *, unsigned int); 1657extern void bfd_elf32_write_relocs 1658 (bfd *, asection *, void *); 1659extern bfd_boolean bfd_elf32_slurp_reloc_table 1660 (bfd *, asection *, asymbol **, bfd_boolean); 1661 1662extern const bfd_target *bfd_elf64_object_p 1663 (bfd *); 1664extern const bfd_target *bfd_elf64_core_file_p 1665 (bfd *); 1666extern char *bfd_elf64_core_file_failing_command 1667 (bfd *); 1668extern int bfd_elf64_core_file_failing_signal 1669 (bfd *); 1670extern bfd_boolean bfd_elf64_core_file_matches_executable_p 1671 (bfd *, bfd *); 1672 1673extern void bfd_elf64_swap_symbol_in 1674 (bfd *, const void *, const void *, Elf_Internal_Sym *); 1675extern void bfd_elf64_swap_symbol_out 1676 (bfd *, const Elf_Internal_Sym *, void *, void *); 1677extern void bfd_elf64_swap_reloc_in 1678 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1679extern void bfd_elf64_swap_reloc_out 1680 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1681extern void bfd_elf64_swap_reloca_in 1682 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 1683extern void bfd_elf64_swap_reloca_out 1684 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 1685extern void bfd_elf64_swap_phdr_in 1686 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); 1687extern void bfd_elf64_swap_phdr_out 1688 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); 1689extern void bfd_elf64_swap_dyn_in 1690 (bfd *, const void *, Elf_Internal_Dyn *); 1691extern void bfd_elf64_swap_dyn_out 1692 (bfd *, const Elf_Internal_Dyn *, void *); 1693extern long bfd_elf64_slurp_symbol_table 1694 (bfd *, asymbol **, bfd_boolean); 1695extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr 1696 (bfd *); 1697extern int bfd_elf64_write_out_phdrs 1698 (bfd *, const Elf_Internal_Phdr *, unsigned int); 1699extern void bfd_elf64_write_relocs 1700 (bfd *, asection *, void *); 1701extern bfd_boolean bfd_elf64_slurp_reloc_table 1702 (bfd *, asection *, asymbol **, bfd_boolean); 1703 1704extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup 1705 (bfd *, struct bfd_link_info *, const char *); 1706extern bfd_boolean bfd_elf_link_add_symbols 1707 (bfd *, struct bfd_link_info *); 1708extern bfd_boolean _bfd_elf_add_dynamic_entry 1709 (struct bfd_link_info *, bfd_vma, bfd_vma); 1710 1711extern bfd_boolean bfd_elf_link_record_dynamic_symbol 1712 (struct bfd_link_info *, struct elf_link_hash_entry *); 1713 1714extern int bfd_elf_link_record_local_dynamic_symbol 1715 (struct bfd_link_info *, bfd *, long); 1716 1717extern bfd_boolean _bfd_elf_close_and_cleanup 1718 (bfd *); 1719extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 1720 (bfd *, arelent *, struct bfd_symbol *, void *, 1721 asection *, bfd *, char **); 1722 1723extern bfd_boolean bfd_elf_final_link 1724 (bfd *, struct bfd_link_info *); 1725 1726extern bfd_boolean bfd_elf_gc_sections 1727 (bfd *, struct bfd_link_info *); 1728 1729extern bfd_boolean bfd_elf_gc_record_vtinherit 1730 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 1731 1732extern bfd_boolean bfd_elf_gc_record_vtentry 1733 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 1734 1735extern bfd_boolean _bfd_elf_gc_mark 1736 (struct bfd_link_info *, asection *, 1737 asection * (*) (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 1738 struct elf_link_hash_entry *, Elf_Internal_Sym *)); 1739 1740extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets 1741 (bfd *, struct bfd_link_info *); 1742 1743extern bfd_boolean bfd_elf_gc_common_final_link 1744 (bfd *, struct bfd_link_info *); 1745 1746extern bfd_boolean bfd_elf_reloc_symbol_deleted_p 1747 (bfd_vma, void *); 1748 1749extern struct elf_segment_map * 1750_bfd_elf_make_dynamic_segment 1751 (bfd *, asection *); 1752 1753/* Exported interface for writing elf corefile notes. */ 1754extern char *elfcore_write_note 1755 (bfd *, char *, int *, const char *, int, const void *, int); 1756extern char *elfcore_write_prpsinfo 1757 (bfd *, char *, int *, const char *, const char *); 1758extern char *elfcore_write_prstatus 1759 (bfd *, char *, int *, long, int, const void *); 1760extern char * elfcore_write_pstatus 1761 (bfd *, char *, int *, long, int, const void *); 1762extern char *elfcore_write_prfpreg 1763 (bfd *, char *, int *, const void *, int); 1764extern char *elfcore_write_prxfpreg 1765 (bfd *, char *, int *, const void *, int); 1766extern char *elfcore_write_lwpstatus 1767 (bfd *, char *, int *, long, int, const void *); 1768 1769extern bfd *_bfd_elf32_bfd_from_remote_memory 1770 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1771 int (*target_read_memory) (bfd_vma, char *, int)); 1772extern bfd *_bfd_elf64_bfd_from_remote_memory 1773 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1774 int (*target_read_memory) (bfd_vma, char *, int)); 1775 1776/* SH ELF specific routine. */ 1777 1778extern bfd_boolean _sh_elf_set_mach_from_flags 1779 (bfd *); 1780 1781/* This is the condition under which finish_dynamic_symbol will be called. 1782 If our finish_dynamic_symbol isn't called, we'll need to do something 1783 about initializing any .plt and .got entries in relocate_section. */ 1784#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ 1785 ((DYN) \ 1786 && ((SHARED) || !(H)->forced_local) \ 1787 && ((H)->dynindx != -1 || (H)->forced_local)) 1788 1789/* This macro is to avoid lots of duplicated code in the body 1790 of xxx_relocate_section() in the various elfxx-xxxx.c files. */ 1791#define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ 1792 r_symndx, symtab_hdr, sym_hashes, \ 1793 h, sec, relocation, \ 1794 unresolved_reloc, warned) \ 1795 do \ 1796 { \ 1797 /* It seems this can happen with erroneous or unsupported \ 1798 input (mixing a.out and elf in an archive, for example.) */ \ 1799 if (sym_hashes == NULL) \ 1800 return FALSE; \ 1801 \ 1802 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ 1803 \ 1804 while (h->root.type == bfd_link_hash_indirect \ 1805 || h->root.type == bfd_link_hash_warning) \ 1806 h = (struct elf_link_hash_entry *) h->root.u.i.link; \ 1807 \ 1808 warned = FALSE; \ 1809 unresolved_reloc = FALSE; \ 1810 relocation = 0; \ 1811 if (h->root.type == bfd_link_hash_defined \ 1812 || h->root.type == bfd_link_hash_defweak) \ 1813 { \ 1814 sec = h->root.u.def.section; \ 1815 if (sec == NULL \ 1816 || sec->output_section == NULL) \ 1817 /* Set a flag that will be cleared later if we find a \ 1818 relocation value for this symbol. output_section \ 1819 is typically NULL for symbols satisfied by a shared \ 1820 library. */ \ 1821 unresolved_reloc = TRUE; \ 1822 else \ 1823 relocation = (h->root.u.def.value \ 1824 + sec->output_section->vma \ 1825 + sec->output_offset); \ 1826 } \ 1827 else if (h->root.type == bfd_link_hash_undefweak) \ 1828 ; \ 1829 else if (info->unresolved_syms_in_objects == RM_IGNORE \ 1830 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ 1831 ; \ 1832 else \ 1833 { \ 1834 bfd_boolean err; \ 1835 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ 1836 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ 1837 if (!info->callbacks->undefined_symbol (info, \ 1838 h->root.root.string, \ 1839 input_bfd, \ 1840 input_section, \ 1841 rel->r_offset, err)) \ 1842 return FALSE; \ 1843 warned = TRUE; \ 1844 } \ 1845 } \ 1846 while (0) 1847 1848#endif /* _LIBELF_H_ */ 1849