elf-bfd.h revision 1.1.1.2
1 /* BFD back-end data structures for ELF files. 2 Copyright 1992-2013 Free Software Foundation, Inc. 3 Written by Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #ifndef _LIBELF_H_ 23 #define _LIBELF_H_ 1 24 25 #include "elf/common.h" 26 #include "elf/external.h" 27 #include "elf/internal.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 PR 9934: It is possible to have relocations that do not refer to 34 symbols, thus it is also possible to have a relocation section in 35 an object file, but no symbol table. */ 36 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0) 37 38 /* If size isn't specified as 64 or 32, NAME macro should fail. */ 39 #ifndef NAME 40 #if ARCH_SIZE == 64 41 #define NAME(x, y) x ## 64 ## _ ## y 42 #endif 43 #if ARCH_SIZE == 32 44 #define NAME(x, y) x ## 32 ## _ ## y 45 #endif 46 #endif 47 48 #ifndef NAME 49 #define NAME(x, y) x ## NOSIZE ## _ ## y 50 #endif 51 52 #define ElfNAME(X) NAME(Elf,X) 53 #define elfNAME(X) NAME(elf,X) 54 55 /* Information held for an ELF symbol. The first field is the 56 corresponding asymbol. Every symbol is an ELF file is actually a 57 pointer to this structure, although it is often handled as a 58 pointer to an asymbol. */ 59 60 typedef struct 61 { 62 /* The BFD symbol. */ 63 asymbol symbol; 64 /* ELF symbol information. */ 65 Elf_Internal_Sym internal_elf_sym; 66 /* Backend specific information. */ 67 union 68 { 69 unsigned int hppa_arg_reloc; 70 void *mips_extr; 71 void *any; 72 } 73 tc_data; 74 75 /* Version information. This is from an Elf_Internal_Versym 76 structure in a SHT_GNU_versym section. It is zero if there is no 77 version information. */ 78 unsigned short version; 79 80 } elf_symbol_type; 81 82 struct elf_strtab_hash; 84 struct got_entry; 85 struct plt_entry; 86 87 union gotplt_union 88 { 89 bfd_signed_vma refcount; 90 bfd_vma offset; 91 struct got_entry *glist; 92 struct plt_entry *plist; 93 }; 94 95 struct elf_link_virtual_table_entry 96 { 97 /* Virtual table entry use information. This array is nominally of size 98 size/sizeof(target_void_pointer), though we have to be able to assume 99 and track a size while the symbol is still undefined. It is indexed 100 via offset/sizeof(target_void_pointer). */ 101 size_t size; 102 bfd_boolean *used; 103 104 /* Virtual table derivation info. */ 105 struct elf_link_hash_entry *parent; 106 }; 107 108 /* ELF linker hash table entries. */ 109 110 struct elf_link_hash_entry 111 { 112 struct bfd_link_hash_entry root; 113 114 /* Symbol index in output file. This is initialized to -1. It is 115 set to -2 if the symbol is used by a reloc. */ 116 long indx; 117 118 /* Symbol index as a dynamic symbol. Initialized to -1, and remains 119 -1 if this is not a dynamic symbol. */ 120 /* ??? Note that this is consistently used as a synonym for tests 121 against whether we can perform various simplifying transformations 122 to the code. (E.g. changing a pc-relative jump to a PLT entry 123 into a pc-relative jump to the target function.) That test, which 124 is often relatively complex, and someplaces wrong or incomplete, 125 should really be replaced by a predicate in elflink.c. 126 127 End result: this field -1 does not indicate that the symbol is 128 not in the dynamic symbol table, but rather that the symbol is 129 not visible outside this DSO. */ 130 long dynindx; 131 132 /* If this symbol requires an entry in the global offset table, the 133 processor specific backend uses this field to track usage and 134 final offset. Two schemes are supported: The first assumes that 135 a symbol may only have one GOT entry, and uses REFCOUNT until 136 size_dynamic_sections, at which point the contents of the .got is 137 fixed. Afterward, if OFFSET is -1, then the symbol does not 138 require a global offset table entry. The second scheme allows 139 multiple GOT entries per symbol, managed via a linked list 140 pointed to by GLIST. */ 141 union gotplt_union got; 142 143 /* Same, but tracks a procedure linkage table entry. */ 144 union gotplt_union plt; 145 146 /* Symbol size. */ 147 bfd_size_type size; 148 149 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */ 150 unsigned int type : 8; 151 152 /* Symbol st_other value, symbol visibility. */ 153 unsigned int other : 8; 154 155 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */ 156 unsigned int target_internal : 8; 157 158 /* Symbol is referenced by a non-shared object (other than the object 159 in which it is defined). */ 160 unsigned int ref_regular : 1; 161 /* Symbol is defined by a non-shared object. */ 162 unsigned int def_regular : 1; 163 /* Symbol is referenced by a shared object. */ 164 unsigned int ref_dynamic : 1; 165 /* Symbol is defined by a shared object. */ 166 unsigned int def_dynamic : 1; 167 /* Symbol has a non-weak reference from a non-shared object (other than 168 the object in which it is defined). */ 169 unsigned int ref_regular_nonweak : 1; 170 /* Dynamic symbol has been adjustd. */ 171 unsigned int dynamic_adjusted : 1; 172 /* Symbol needs a copy reloc. */ 173 unsigned int needs_copy : 1; 174 /* Symbol needs a procedure linkage table entry. */ 175 unsigned int needs_plt : 1; 176 /* Symbol appears in a non-ELF input file. */ 177 unsigned int non_elf : 1; 178 /* Symbol should be marked as hidden in the version information. */ 179 unsigned int hidden : 1; 180 /* Symbol was forced to local scope due to a version script file. */ 181 unsigned int forced_local : 1; 182 /* Symbol was forced to be dynamic due to a version script file. */ 183 unsigned int dynamic : 1; 184 /* Symbol was marked during garbage collection. */ 185 unsigned int mark : 1; 186 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is 187 not currently set by all the backends. */ 188 unsigned int non_got_ref : 1; 189 /* Symbol has a definition in a shared object. 190 FIXME: There is no real need for this field if def_dynamic is never 191 cleared and all places that test def_dynamic also test def_regular. */ 192 unsigned int dynamic_def : 1; 193 /* Symbol has a non-weak reference from a shared object. */ 194 unsigned int ref_dynamic_nonweak : 1; 195 /* Symbol is referenced with a relocation where C/C++ pointer equality 196 matters. */ 197 unsigned int pointer_equality_needed : 1; 198 /* Symbol is a unique global symbol. */ 199 unsigned int unique_global : 1; 200 201 /* String table index in .dynstr if this is a dynamic symbol. */ 202 unsigned long dynstr_index; 203 204 union 205 { 206 /* If this is a weak defined symbol from a dynamic object, this 207 field points to a defined symbol with the same value, if there is 208 one. Otherwise it is NULL. */ 209 struct elf_link_hash_entry *weakdef; 210 211 /* Hash value of the name computed using the ELF hash function. 212 Used part way through size_dynamic_sections, after we've finished 213 with weakdefs. */ 214 unsigned long elf_hash_value; 215 } u; 216 217 /* Version information. */ 218 union 219 { 220 /* This field is used for a symbol which is not defined in a 221 regular object. It points to the version information read in 222 from the dynamic object. */ 223 Elf_Internal_Verdef *verdef; 224 /* This field is used for a symbol which is defined in a regular 225 object. It is set up in size_dynamic_sections. It points to 226 the version information we should write out for this symbol. */ 227 struct bfd_elf_version_tree *vertree; 228 } verinfo; 229 230 struct elf_link_virtual_table_entry *vtable; 231 }; 232 233 /* Will references to this symbol always reference the symbol 234 in this object? */ 235 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \ 236 _bfd_elf_symbol_refs_local_p (H, INFO, 0) 237 238 /* Will _calls_ to this symbol always call the version in this object? */ 239 #define SYMBOL_CALLS_LOCAL(INFO, H) \ 240 _bfd_elf_symbol_refs_local_p (H, INFO, 1) 241 242 /* Common symbols that are turned into definitions don't have the 243 DEF_REGULAR flag set, so they might appear to be undefined. */ 244 #define ELF_COMMON_DEF_P(H) \ 245 (!(H)->def_regular \ 246 && !(H)->def_dynamic \ 247 && (H)->root.type == bfd_link_hash_defined) 248 249 /* Records local symbols to be emitted in the dynamic symbol table. */ 250 251 struct elf_link_local_dynamic_entry 252 { 253 struct elf_link_local_dynamic_entry *next; 254 255 /* The input bfd this symbol came from. */ 256 bfd *input_bfd; 257 258 /* The index of the local symbol being copied. */ 259 long input_indx; 260 261 /* The index in the outgoing dynamic symbol table. */ 262 long dynindx; 263 264 /* A copy of the input symbol. */ 265 Elf_Internal_Sym isym; 266 }; 267 268 struct elf_link_loaded_list 269 { 270 struct elf_link_loaded_list *next; 271 bfd *abfd; 272 }; 273 274 /* Structures used by the eh_frame optimization code. */ 275 struct eh_cie_fde 276 { 277 union { 278 struct { 279 /* If REMOVED == 1, this is the CIE that the FDE originally used. 280 The CIE belongs to the same .eh_frame input section as the FDE. 281 282 If REMOVED == 0, this is the CIE that we have chosen to use for 283 the output FDE. The CIE's REMOVED field is also 0, but the CIE 284 might belong to a different .eh_frame input section from the FDE. */ 285 struct eh_cie_fde *cie_inf; 286 struct eh_cie_fde *next_for_section; 287 } fde; 288 struct { 289 /* CIEs have three states: 290 291 - REMOVED && !MERGED: Slated for removal because we haven't yet 292 proven that an FDE needs it. FULL_CIE, if nonnull, points to 293 more detailed information about the CIE. 294 295 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH, 296 which may not belong to the same input section. 297 298 - !REMOVED: We have decided to keep this CIE. SEC is the 299 .eh_frame input section that contains the CIE. */ 300 union { 301 struct cie *full_cie; 302 struct eh_cie_fde *merged_with; 303 asection *sec; 304 } u; 305 306 /* The offset of the personality data from the start of the CIE, 307 or 0 if the CIE doesn't have any. */ 308 unsigned int personality_offset : 8; 309 310 /* True if we have marked relocations associated with this CIE. */ 311 unsigned int gc_mark : 1; 312 313 /* True if we have decided to turn an absolute LSDA encoding into 314 a PC-relative one. */ 315 unsigned int make_lsda_relative : 1; 316 317 /* True if we have decided to turn an absolute personality 318 encoding into a PC-relative one. */ 319 unsigned int make_per_encoding_relative : 1; 320 321 /* True if the CIE contains personality data and if that 322 data uses a PC-relative encoding. Always true when 323 make_per_encoding_relative is. */ 324 unsigned int per_encoding_relative : 1; 325 326 /* True if we need to add an 'R' (FDE encoding) entry to the 327 CIE's augmentation data. */ 328 unsigned int add_fde_encoding : 1; 329 330 /* True if we have merged this CIE with another. */ 331 unsigned int merged : 1; 332 333 /* Unused bits. */ 334 unsigned int pad1 : 18; 335 } cie; 336 } u; 337 unsigned int reloc_index; 338 unsigned int size; 339 unsigned int offset; 340 unsigned int new_offset; 341 unsigned int fde_encoding : 8; 342 unsigned int lsda_encoding : 8; 343 unsigned int lsda_offset : 8; 344 345 /* True if this entry represents a CIE, false if it represents an FDE. */ 346 unsigned int cie : 1; 347 348 /* True if this entry is currently marked for removal. */ 349 unsigned int removed : 1; 350 351 /* True if we need to add a 'z' (augmentation size) entry to the CIE's 352 augmentation data, and an associated byte to each of the CIE's FDEs. */ 353 unsigned int add_augmentation_size : 1; 354 355 /* True if we have decided to convert absolute FDE relocations into 356 relative ones. This applies to the first relocation in the FDE, 357 which is against the code that the FDE describes. */ 358 unsigned int make_relative : 1; 359 360 /* Unused bits. */ 361 unsigned int pad1 : 4; 362 363 unsigned int *set_loc; 364 }; 365 366 struct eh_frame_sec_info 367 { 368 unsigned int count; 369 struct cie *cies; 370 struct eh_cie_fde entry[1]; 371 }; 372 373 struct eh_frame_array_ent 374 { 375 bfd_vma initial_loc; 376 bfd_vma fde; 377 }; 378 379 struct htab; 380 381 struct eh_frame_hdr_info 382 { 383 struct htab *cies; 384 asection *hdr_sec; 385 unsigned int fde_count, array_count; 386 struct eh_frame_array_ent *array; 387 /* TRUE if we should try to merge CIEs between input sections. */ 388 bfd_boolean merge_cies; 389 /* TRUE if all .eh_frames have been parsd. */ 390 bfd_boolean parsed_eh_frames; 391 /* TRUE if .eh_frame_hdr should contain the sorted search table. 392 We build it if we successfully read all .eh_frame input sections 393 and recognize them. */ 394 bfd_boolean table; 395 }; 396 397 /* Enum used to identify target specific extensions to the elf_obj_tdata 398 and elf_link_hash_table structures. Note the enums deliberately start 399 from 1 so that we can detect an uninitialized field. The generic value 400 is last so that additions to this enum do not need to modify more than 401 one line. */ 402 enum elf_target_id 403 { 404 AARCH64_ELF_DATA = 1, 405 ALPHA_ELF_DATA, 406 ARM_ELF_DATA, 407 AVR_ELF_DATA, 408 BFIN_ELF_DATA, 409 CRIS_ELF_DATA, 410 FRV_ELF_DATA, 411 HPPA32_ELF_DATA, 412 HPPA64_ELF_DATA, 413 I386_ELF_DATA, 414 IA64_ELF_DATA, 415 LM32_ELF_DATA, 416 M32R_ELF_DATA, 417 M68HC11_ELF_DATA, 418 M68K_ELF_DATA, 419 METAG_ELF_DATA, 420 MICROBLAZE_ELF_DATA, 421 MIPS_ELF_DATA, 422 MN10300_ELF_DATA, 423 NIOS2_ELF_DATA, 424 PPC32_ELF_DATA, 425 PPC64_ELF_DATA, 426 S390_ELF_DATA, 427 SH_ELF_DATA, 428 SPARC_ELF_DATA, 429 SPU_ELF_DATA, 430 TIC6X_ELF_DATA, 431 X86_64_ELF_DATA, 432 XTENSA_ELF_DATA, 433 XGATE_ELF_DATA, 434 TILEGX_ELF_DATA, 435 TILEPRO_ELF_DATA, 436 GENERIC_ELF_DATA 437 }; 438 439 /* ELF linker hash table. */ 440 441 struct elf_link_hash_table 442 { 443 struct bfd_link_hash_table root; 444 445 /* An identifier used to distinguish different target 446 specific extensions to this structure. */ 447 enum elf_target_id hash_table_id; 448 449 /* Whether we have created the special dynamic sections required 450 when linking against or generating a shared object. */ 451 bfd_boolean dynamic_sections_created; 452 453 /* True if this target has relocatable executables, so needs dynamic 454 section symbols. */ 455 bfd_boolean is_relocatable_executable; 456 457 /* The BFD used to hold special sections created by the linker. 458 This will be the first BFD found which requires these sections to 459 be created. */ 460 bfd *dynobj; 461 462 /* The value to use when initialising got.refcount/offset and 463 plt.refcount/offset in an elf_link_hash_entry. Set to zero when 464 the values are refcounts. Set to init_got_offset/init_plt_offset 465 in size_dynamic_sections when the values may be offsets. */ 466 union gotplt_union init_got_refcount; 467 union gotplt_union init_plt_refcount; 468 469 /* The value to use for got.refcount/offset and plt.refcount/offset 470 when the values may be offsets. Normally (bfd_vma) -1. */ 471 union gotplt_union init_got_offset; 472 union gotplt_union init_plt_offset; 473 474 /* The number of symbols found in the link which must be put into 475 the .dynsym section. */ 476 bfd_size_type dynsymcount; 477 478 /* The string table of dynamic symbols, which becomes the .dynstr 479 section. */ 480 struct elf_strtab_hash *dynstr; 481 482 /* The number of buckets in the hash table in the .hash section. 483 This is based on the number of dynamic symbols. */ 484 bfd_size_type bucketcount; 485 486 /* A linked list of DT_NEEDED names found in dynamic objects 487 included in the link. */ 488 struct bfd_link_needed_list *needed; 489 490 /* Sections in the output bfd that provides a section symbol 491 to be used by relocations emitted against local symbols. 492 Most targets will not use data_index_section. */ 493 asection *text_index_section; 494 asection *data_index_section; 495 496 /* The _GLOBAL_OFFSET_TABLE_ symbol. */ 497 struct elf_link_hash_entry *hgot; 498 499 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */ 500 struct elf_link_hash_entry *hplt; 501 502 /* The _DYNAMIC symbol. */ 503 struct elf_link_hash_entry *hdynamic; 504 505 /* A pointer to information used to merge SEC_MERGE sections. */ 506 void *merge_info; 507 508 /* Used to link stabs in sections. */ 509 struct stab_info stab_info; 510 511 /* Used by eh_frame code when editing .eh_frame. */ 512 struct eh_frame_hdr_info eh_info; 513 514 /* A linked list of local symbols to be added to .dynsym. */ 515 struct elf_link_local_dynamic_entry *dynlocal; 516 517 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic 518 objects included in the link. */ 519 struct bfd_link_needed_list *runpath; 520 521 /* Cached first output tls section and size of PT_TLS segment. */ 522 asection *tls_sec; 523 bfd_size_type tls_size; 524 525 /* A linked list of BFD's loaded in the link. */ 526 struct elf_link_loaded_list *loaded; 527 528 /* Short-cuts to get to dynamic linker sections. */ 529 asection *sgot; 530 asection *sgotplt; 531 asection *srelgot; 532 asection *splt; 533 asection *srelplt; 534 asection *igotplt; 535 asection *iplt; 536 asection *irelplt; 537 asection *irelifunc; 538 }; 539 540 /* Look up an entry in an ELF linker hash table. */ 541 542 #define elf_link_hash_lookup(table, string, create, copy, follow) \ 543 ((struct elf_link_hash_entry *) \ 544 bfd_link_hash_lookup (&(table)->root, (string), (create), \ 545 (copy), (follow))) 546 547 /* Traverse an ELF linker hash table. */ 548 549 #define elf_link_hash_traverse(table, func, info) \ 550 (bfd_link_hash_traverse \ 551 (&(table)->root, \ 552 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 553 (info))) 554 555 /* Get the ELF linker hash table from a link_info structure. */ 556 557 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) 558 559 #define elf_hash_table_id(table) ((table) -> hash_table_id) 560 561 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */ 562 #define is_elf_hash_table(htab) \ 563 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) 564 565 /* Used by bfd_sym_from_r_symndx to cache a small number of local 566 symbols. */ 567 #define LOCAL_SYM_CACHE_SIZE 32 568 struct sym_cache 569 { 570 bfd *abfd; 571 unsigned long indx[LOCAL_SYM_CACHE_SIZE]; 572 Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE]; 573 }; 574 575 /* Constant information held for an ELF backend. */ 577 578 struct elf_size_info { 579 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; 580 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; 581 582 /* The size of entries in the .hash section. */ 583 unsigned char sizeof_hash_entry; 584 585 /* The number of internal relocations to allocate per external 586 relocation entry. */ 587 unsigned char int_rels_per_ext_rel; 588 /* We use some fixed size arrays. This should be large enough to 589 handle all back-ends. */ 590 #define MAX_INT_RELS_PER_EXT_REL 3 591 592 unsigned char arch_size, log_file_align; 593 unsigned char elfclass, ev_current; 594 int (*write_out_phdrs) 595 (bfd *, const Elf_Internal_Phdr *, unsigned int); 596 bfd_boolean 597 (*write_shdrs_and_ehdr) (bfd *); 598 bfd_boolean (*checksum_contents) 599 (bfd * , void (*) (const void *, size_t, void *), void *); 600 void (*write_relocs) 601 (bfd *, asection *, void *); 602 bfd_boolean (*swap_symbol_in) 603 (bfd *, const void *, const void *, Elf_Internal_Sym *); 604 void (*swap_symbol_out) 605 (bfd *, const Elf_Internal_Sym *, void *, void *); 606 bfd_boolean (*slurp_reloc_table) 607 (bfd *, asection *, asymbol **, bfd_boolean); 608 long (*slurp_symbol_table) 609 (bfd *, asymbol **, bfd_boolean); 610 void (*swap_dyn_in) 611 (bfd *, const void *, Elf_Internal_Dyn *); 612 void (*swap_dyn_out) 613 (bfd *, const Elf_Internal_Dyn *, void *); 614 615 /* This function is called to swap in a REL relocation. If an 616 external relocation corresponds to more than one internal 617 relocation, then all relocations are swapped in at once. */ 618 void (*swap_reloc_in) 619 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 620 621 /* This function is called to swap out a REL relocation. */ 622 void (*swap_reloc_out) 623 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 624 625 /* This function is called to swap in a RELA relocation. If an 626 external relocation corresponds to more than one internal 627 relocation, then all relocations are swapped in at once. */ 628 void (*swap_reloca_in) 629 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 630 631 /* This function is called to swap out a RELA relocation. */ 632 void (*swap_reloca_out) 633 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 634 }; 635 636 #define elf_symbol_from(ABFD,S) \ 637 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ 638 && (S)->the_bfd->tdata.elf_obj_data != 0) \ 639 ? (elf_symbol_type *) (S) \ 640 : 0) 641 642 enum elf_reloc_type_class { 643 reloc_class_normal, 644 reloc_class_relative, 645 reloc_class_plt, 646 reloc_class_copy 647 }; 648 649 struct elf_reloc_cookie 650 { 651 Elf_Internal_Rela *rels, *rel, *relend; 652 Elf_Internal_Sym *locsyms; 653 bfd *abfd; 654 size_t locsymcount; 655 size_t extsymoff; 656 struct elf_link_hash_entry **sym_hashes; 657 int r_sym_shift; 658 bfd_boolean bad_symtab; 659 }; 660 661 /* The level of IRIX compatibility we're striving for. */ 662 663 typedef enum { 664 ict_none, 665 ict_irix5, 666 ict_irix6 667 } irix_compat_t; 668 669 /* Mapping of ELF section names and types. */ 670 struct bfd_elf_special_section 671 { 672 const char *prefix; 673 int prefix_length; 674 /* 0 means name must match PREFIX exactly. 675 -1 means name must start with PREFIX followed by an arbitrary string. 676 -2 means name must match PREFIX exactly or consist of PREFIX followed 677 by a dot then anything. 678 > 0 means name must start with the first PREFIX_LENGTH chars of 679 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ 680 int suffix_length; 681 int type; 682 bfd_vma attr; 683 }; 684 685 enum action_discarded 686 { 687 COMPLAIN = 1, 688 PRETEND = 2 689 }; 690 691 typedef asection * (*elf_gc_mark_hook_fn) 692 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 693 struct elf_link_hash_entry *, Elf_Internal_Sym *); 694 695 struct elf_backend_data 696 { 697 /* The architecture for this backend. */ 698 enum bfd_architecture arch; 699 700 /* An identifier used to distinguish different target specific 701 extensions to elf_obj_tdata and elf_link_hash_table structures. */ 702 enum elf_target_id target_id; 703 704 /* The ELF machine code (EM_xxxx) for this backend. */ 705 int elf_machine_code; 706 707 /* EI_OSABI. */ 708 int elf_osabi; 709 710 /* The maximum page size for this backend. */ 711 bfd_vma maxpagesize; 712 713 /* The minimum page size for this backend. An input object will not be 714 considered page aligned unless its sections are correctly aligned for 715 pages at least this large. May be smaller than maxpagesize. */ 716 bfd_vma minpagesize; 717 718 /* The common page size for this backend. */ 719 bfd_vma commonpagesize; 720 721 /* The BFD flags applied to sections created for dynamic linking. */ 722 flagword dynamic_sec_flags; 723 724 /* Architecture-specific data for this backend. 725 This is actually a pointer to some type like struct elf_ARCH_data. */ 726 const void *arch_data; 727 728 /* A function to translate an ELF RELA relocation to a BFD arelent 729 structure. */ 730 void (*elf_info_to_howto) 731 (bfd *, arelent *, Elf_Internal_Rela *); 732 733 /* A function to translate an ELF REL relocation to a BFD arelent 734 structure. */ 735 void (*elf_info_to_howto_rel) 736 (bfd *, arelent *, Elf_Internal_Rela *); 737 738 /* A function to determine whether a symbol is global when 739 partitioning the symbol table into local and global symbols. 740 This should be NULL for most targets, in which case the correct 741 thing will be done. MIPS ELF, at least on the Irix 5, has 742 special requirements. */ 743 bfd_boolean (*elf_backend_sym_is_global) 744 (bfd *, asymbol *); 745 746 /* The remaining functions are hooks which are called only if they 747 are not NULL. */ 748 749 /* A function to permit a backend specific check on whether a 750 particular BFD format is relevant for an object file, and to 751 permit the backend to set any global information it wishes. When 752 this is called elf_elfheader is set, but anything else should be 753 used with caution. If this returns FALSE, the check_format 754 routine will return a bfd_error_wrong_format error. */ 755 bfd_boolean (*elf_backend_object_p) 756 (bfd *); 757 758 /* A function to do additional symbol processing when reading the 759 ELF symbol table. This is where any processor-specific special 760 section indices are handled. */ 761 void (*elf_backend_symbol_processing) 762 (bfd *, asymbol *); 763 764 /* A function to do additional symbol processing after reading the 765 entire ELF symbol table. */ 766 bfd_boolean (*elf_backend_symbol_table_processing) 767 (bfd *, elf_symbol_type *, unsigned int); 768 769 /* A function to set the type of the info field. Processor-specific 770 types should be handled here. */ 771 int (*elf_backend_get_symbol_type) 772 (Elf_Internal_Sym *, int); 773 774 /* A function to return the linker hash table entry of a symbol that 775 might be satisfied by an archive symbol. */ 776 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup) 777 (bfd *, struct bfd_link_info *, const char *); 778 779 /* Return true if local section symbols should have a non-null st_name. 780 NULL implies false. */ 781 bfd_boolean (*elf_backend_name_local_section_symbols) 782 (bfd *); 783 784 /* A function to do additional processing on the ELF section header 785 just before writing it out. This is used to set the flags and 786 type fields for some sections, or to actually write out data for 787 unusual sections. */ 788 bfd_boolean (*elf_backend_section_processing) 789 (bfd *, Elf_Internal_Shdr *); 790 791 /* A function to handle unusual section types when creating BFD 792 sections from ELF sections. */ 793 bfd_boolean (*elf_backend_section_from_shdr) 794 (bfd *, Elf_Internal_Shdr *, const char *, int); 795 796 /* A function to convert machine dependent ELF section header flags to 797 BFD internal section header flags. */ 798 bfd_boolean (*elf_backend_section_flags) 799 (flagword *, const Elf_Internal_Shdr *); 800 801 /* A function that returns a struct containing ELF section flags and 802 type for the given BFD section. */ 803 const struct bfd_elf_special_section * (*get_sec_type_attr) 804 (bfd *, asection *); 805 806 /* A function to handle unusual program segment types when creating BFD 807 sections from ELF program segments. */ 808 bfd_boolean (*elf_backend_section_from_phdr) 809 (bfd *, Elf_Internal_Phdr *, int, const char *); 810 811 /* A function to set up the ELF section header for a BFD section in 812 preparation for writing it out. This is where the flags and type 813 fields are set for unusual sections. */ 814 bfd_boolean (*elf_backend_fake_sections) 815 (bfd *, Elf_Internal_Shdr *, asection *); 816 817 /* A function to get the ELF section index for a BFD section. If 818 this returns TRUE, the section was found. If it is a normal ELF 819 section, *RETVAL should be left unchanged. If it is not a normal 820 ELF section *RETVAL should be set to the SHN_xxxx index. */ 821 bfd_boolean (*elf_backend_section_from_bfd_section) 822 (bfd *, asection *, int *retval); 823 824 /* If this field is not NULL, it is called by the add_symbols phase 825 of a link just before adding a symbol to the global linker hash 826 table. It may modify any of the fields as it wishes. If *NAME 827 is set to NULL, the symbol will be skipped rather than being 828 added to the hash table. This function is responsible for 829 handling all processor dependent symbol bindings and section 830 indices, and must set at least *FLAGS and *SEC for each processor 831 dependent case; failure to do so will cause a link error. */ 832 bfd_boolean (*elf_add_symbol_hook) 833 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *, 834 const char **name, flagword *flags, asection **sec, bfd_vma *value); 835 836 /* If this field is not NULL, it is called by the elf_link_output_sym 837 phase of a link for each symbol which will appear in the object file. 838 On error, this function returns 0. 1 is returned when the symbol 839 should be output, 2 is returned when the symbol should be discarded. */ 840 int (*elf_backend_link_output_symbol_hook) 841 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *, 842 asection *, struct elf_link_hash_entry *); 843 844 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend 845 linker the first time it encounters a dynamic object in the link. 846 This function must create any sections required for dynamic 847 linking. The ABFD argument is a dynamic object. The .interp, 848 .dynamic, .dynsym, .dynstr, and .hash functions have already been 849 created, and this function may modify the section flags if 850 desired. This function will normally create the .got and .plt 851 sections, but different backends have different requirements. */ 852 bfd_boolean (*elf_backend_create_dynamic_sections) 853 (bfd *abfd, struct bfd_link_info *info); 854 855 /* When creating a shared library, determine whether to omit the 856 dynamic symbol for the section. */ 857 bfd_boolean (*elf_backend_omit_section_dynsym) 858 (bfd *output_bfd, struct bfd_link_info *info, asection *osec); 859 860 /* Return TRUE if relocations of targets are compatible to the extent 861 that CHECK_RELOCS will properly process them. PR 4424. */ 862 bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *); 863 864 /* The CHECK_RELOCS function is called by the add_symbols phase of 865 the ELF backend linker. It is called once for each section with 866 relocs of an object file, just after the symbols for the object 867 file have been added to the global linker hash table. The 868 function must look through the relocs and do any special handling 869 required. This generally means allocating space in the global 870 offset table, and perhaps allocating space for a reloc. The 871 relocs are always passed as Rela structures; if the section 872 actually uses Rel structures, the r_addend field will always be 873 zero. */ 874 bfd_boolean (*check_relocs) 875 (bfd *abfd, struct bfd_link_info *info, asection *o, 876 const Elf_Internal_Rela *relocs); 877 878 /* The CHECK_DIRECTIVES function is called once per input file by 879 the add_symbols phase of the ELF backend linker. The function 880 must inspect the bfd and create any additional symbols according 881 to any custom directives in the bfd. */ 882 bfd_boolean (*check_directives) 883 (bfd *abfd, struct bfd_link_info *info); 884 885 /* The AS_NEEDED_CLEANUP function is called once per --as-needed 886 input file that was not needed by the add_symbols phase of the 887 ELF backend linker. The function must undo any target specific 888 changes in the symbol hash table. */ 889 bfd_boolean (*as_needed_cleanup) 890 (bfd *abfd, struct bfd_link_info *info); 891 892 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend 893 linker for every symbol which is defined by a dynamic object and 894 referenced by a regular object. This is called after all the 895 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS 896 function has been called. The hash table entry should be 897 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be 898 defined in a section from a dynamic object. Dynamic object 899 sections are not included in the final link, and this function is 900 responsible for changing the value to something which the rest of 901 the link can deal with. This will normally involve adding an 902 entry to the .plt or .got or some such section, and setting the 903 symbol to point to that. */ 904 bfd_boolean (*elf_backend_adjust_dynamic_symbol) 905 (struct bfd_link_info *info, struct elf_link_hash_entry *h); 906 907 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker 908 after all the linker input files have been seen but before the 909 section sizes have been set. This is called after 910 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */ 911 bfd_boolean (*elf_backend_always_size_sections) 912 (bfd *output_bfd, struct bfd_link_info *info); 913 914 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend 915 linker after all the linker input files have been seen but before 916 the sections sizes have been set. This is called after 917 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols. 918 It is only called when linking against a dynamic object. It must 919 set the sizes of the dynamic sections, and may fill in their 920 contents as well. The generic ELF linker can handle the .dynsym, 921 .dynstr and .hash sections. This function must handle the 922 .interp section and any sections created by the 923 CREATE_DYNAMIC_SECTIONS entry point. */ 924 bfd_boolean (*elf_backend_size_dynamic_sections) 925 (bfd *output_bfd, struct bfd_link_info *info); 926 927 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections 928 we keep to use as a base for relocs and symbols. */ 929 void (*elf_backend_init_index_section) 930 (bfd *output_bfd, struct bfd_link_info *info); 931 932 /* The RELOCATE_SECTION function is called by the ELF backend linker 933 to handle the relocations for a section. 934 935 The relocs are always passed as Rela structures; if the section 936 actually uses Rel structures, the r_addend field will always be 937 zero. 938 939 This function is responsible for adjust the section contents as 940 necessary, and (if using Rela relocs and generating a 941 relocatable output file) adjusting the reloc addend as 942 necessary. 943 944 This function does not have to worry about setting the reloc 945 address or the reloc symbol index. 946 947 LOCAL_SYMS is a pointer to the swapped in local symbols. 948 949 LOCAL_SECTIONS is an array giving the section in the input file 950 corresponding to the st_shndx field of each local symbol. 951 952 The global hash table entry for the global symbols can be found 953 via elf_sym_hashes (input_bfd). 954 955 When generating relocatable output, this function must handle 956 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 957 going to be the section symbol corresponding to the output 958 section, which means that the addend must be adjusted 959 accordingly. 960 961 Returns FALSE on error, TRUE on success, 2 if successful and 962 relocations should be written for this section. */ 963 int (*elf_backend_relocate_section) 964 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd, 965 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs, 966 Elf_Internal_Sym *local_syms, asection **local_sections); 967 968 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend 969 linker just before it writes a symbol out to the .dynsym section. 970 The processor backend may make any required adjustment to the 971 symbol. It may also take the opportunity to set contents of the 972 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on 973 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called 974 on those symbols which are defined by a dynamic object. */ 975 bfd_boolean (*elf_backend_finish_dynamic_symbol) 976 (bfd *output_bfd, struct bfd_link_info *info, 977 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym); 978 979 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend 980 linker just before it writes all the dynamic sections out to the 981 output file. The FINISH_DYNAMIC_SYMBOL will have been called on 982 all dynamic symbols. */ 983 bfd_boolean (*elf_backend_finish_dynamic_sections) 984 (bfd *output_bfd, struct bfd_link_info *info); 985 986 /* A function to do any beginning processing needed for the ELF file 987 before building the ELF headers and computing file positions. */ 988 void (*elf_backend_begin_write_processing) 989 (bfd *, struct bfd_link_info *); 990 991 /* A function to do any final processing needed for the ELF file 992 before writing it out. The LINKER argument is TRUE if this BFD 993 was created by the ELF backend linker. */ 994 void (*elf_backend_final_write_processing) 995 (bfd *, bfd_boolean linker); 996 997 /* This function is called by get_program_header_size. It should 998 return the number of additional program segments which this BFD 999 will need. It should return -1 on error. */ 1000 int (*elf_backend_additional_program_headers) 1001 (bfd *, struct bfd_link_info *); 1002 1003 /* This function is called to modify an existing segment map in a 1004 backend specific fashion. */ 1005 bfd_boolean (*elf_backend_modify_segment_map) 1006 (bfd *, struct bfd_link_info *); 1007 1008 /* This function is called to modify program headers just before 1009 they are written. */ 1010 bfd_boolean (*elf_backend_modify_program_headers) 1011 (bfd *, struct bfd_link_info *); 1012 1013 /* This function is called before section garbage collection to 1014 mark entry symbol sections. */ 1015 void (*gc_keep) 1016 (struct bfd_link_info *); 1017 1018 /* This function is called during section garbage collection to 1019 mark sections that define global symbols. */ 1020 bfd_boolean (*gc_mark_dynamic_ref) 1021 (struct elf_link_hash_entry *, void *); 1022 1023 /* This function is called during section gc to discover the section a 1024 particular relocation refers to. */ 1025 elf_gc_mark_hook_fn gc_mark_hook; 1026 1027 /* This function, if defined, is called after the first gc marking pass 1028 to allow the backend to mark additional sections. */ 1029 bfd_boolean (*gc_mark_extra_sections) 1030 (struct bfd_link_info *, elf_gc_mark_hook_fn); 1031 1032 /* This function, if defined, is called during the sweep phase of gc 1033 in order that a backend might update any data structures it might 1034 be maintaining. */ 1035 bfd_boolean (*gc_sweep_hook) 1036 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 1037 1038 /* This function, if defined, is called after the ELF headers have 1039 been created. This allows for things like the OS and ABI versions 1040 to be changed. */ 1041 void (*elf_backend_post_process_headers) 1042 (bfd *, struct bfd_link_info *); 1043 1044 /* This function, if defined, prints a symbol to file and returns the 1045 name of the symbol to be printed. It should return NULL to fall 1046 back to default symbol printing. */ 1047 const char *(*elf_backend_print_symbol_all) 1048 (bfd *, void *, asymbol *); 1049 1050 /* This function, if defined, is called after all local symbols and 1051 global symbols converted to locals are emitted into the symtab 1052 section. It allows the backend to emit special local symbols 1053 not handled in the hash table. */ 1054 bfd_boolean (*elf_backend_output_arch_local_syms) 1055 (bfd *, struct bfd_link_info *, void *, 1056 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 1057 struct elf_link_hash_entry *)); 1058 1059 /* This function, if defined, is called after all symbols are emitted 1060 into the symtab section. It allows the backend to emit special 1061 global symbols not handled in the hash table. */ 1062 bfd_boolean (*elf_backend_output_arch_syms) 1063 (bfd *, struct bfd_link_info *, void *, 1064 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 1065 struct elf_link_hash_entry *)); 1066 1067 /* Copy any information related to dynamic linking from a pre-existing 1068 symbol to a newly created symbol. Also called to copy flags and 1069 other back-end info to a weakdef, in which case the symbol is not 1070 newly created and plt/got refcounts and dynamic indices should not 1071 be copied. */ 1072 void (*elf_backend_copy_indirect_symbol) 1073 (struct bfd_link_info *, struct elf_link_hash_entry *, 1074 struct elf_link_hash_entry *); 1075 1076 /* Modify any information related to dynamic linking such that the 1077 symbol is not exported. */ 1078 void (*elf_backend_hide_symbol) 1079 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1080 1081 /* A function to do additional symbol fixup, called by 1082 _bfd_elf_fix_symbol_flags. */ 1083 bfd_boolean (*elf_backend_fixup_symbol) 1084 (struct bfd_link_info *, struct elf_link_hash_entry *); 1085 1086 /* Merge the backend specific symbol attribute. */ 1087 void (*elf_backend_merge_symbol_attribute) 1088 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, 1089 bfd_boolean); 1090 1091 /* This function, if defined, will return a string containing the 1092 name of a target-specific dynamic tag. */ 1093 char *(*elf_backend_get_target_dtag) 1094 (bfd_vma); 1095 1096 /* Decide whether an undefined symbol is special and can be ignored. 1097 This is the case for OPTIONAL symbols on IRIX. */ 1098 bfd_boolean (*elf_backend_ignore_undef_symbol) 1099 (struct elf_link_hash_entry *); 1100 1101 /* Emit relocations. Overrides default routine for emitting relocs, 1102 except during a relocatable link, or if all relocs are being emitted. */ 1103 bfd_boolean (*elf_backend_emit_relocs) 1104 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1105 struct elf_link_hash_entry **); 1106 1107 /* Count relocations. Not called for relocatable links 1108 or if all relocs are being preserved in the output. */ 1109 unsigned int (*elf_backend_count_relocs) 1110 (struct bfd_link_info *, asection *); 1111 1112 /* This function, if defined, is called when an NT_PRSTATUS note is found 1113 in a core file. */ 1114 bfd_boolean (*elf_backend_grok_prstatus) 1115 (bfd *, Elf_Internal_Note *); 1116 1117 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO 1118 note is found in a core file. */ 1119 bfd_boolean (*elf_backend_grok_psinfo) 1120 (bfd *, Elf_Internal_Note *); 1121 1122 /* This function, if defined, is called to write a note to a corefile. */ 1123 char *(*elf_backend_write_core_note) 1124 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...); 1125 1126 /* This function, if defined, is called to convert target-specific 1127 section flag names into hex values. */ 1128 flagword (*elf_backend_lookup_section_flags_hook) 1129 (char *); 1130 1131 /* This function returns class of a reloc type. */ 1132 enum elf_reloc_type_class (*elf_backend_reloc_type_class) 1133 (const Elf_Internal_Rela *); 1134 1135 /* This function, if defined, removes information about discarded functions 1136 from other sections which mention them. */ 1137 bfd_boolean (*elf_backend_discard_info) 1138 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 1139 1140 /* This function, if defined, signals that the function above has removed 1141 the discarded relocations for this section. */ 1142 bfd_boolean (*elf_backend_ignore_discarded_relocs) 1143 (asection *); 1144 1145 /* What to do when ld finds relocations against symbols defined in 1146 discarded sections. */ 1147 unsigned int (*action_discarded) 1148 (asection *); 1149 1150 /* This function returns the width of FDE pointers in bytes, or 0 if 1151 that can't be determined for some reason. The default definition 1152 goes by the bfd's EI_CLASS. */ 1153 unsigned int (*elf_backend_eh_frame_address_size) 1154 (bfd *, asection *); 1155 1156 /* These functions tell elf-eh-frame whether to attempt to turn 1157 absolute or lsda encodings into pc-relative ones. The default 1158 definition enables these transformations. */ 1159 bfd_boolean (*elf_backend_can_make_relative_eh_frame) 1160 (bfd *, struct bfd_link_info *, asection *); 1161 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) 1162 (bfd *, struct bfd_link_info *, asection *); 1163 1164 /* This function returns an encoding after computing the encoded 1165 value (and storing it in ENCODED) for the given OFFSET into OSEC, 1166 to be stored in at LOC_OFFSET into the LOC_SEC input section. 1167 The default definition chooses a 32-bit PC-relative encoding. */ 1168 bfd_byte (*elf_backend_encode_eh_address) 1169 (bfd *abfd, struct bfd_link_info *info, 1170 asection *osec, bfd_vma offset, 1171 asection *loc_sec, bfd_vma loc_offset, 1172 bfd_vma *encoded); 1173 1174 /* This function, if defined, may write out the given section. 1175 Returns TRUE if it did so and FALSE if the caller should. */ 1176 bfd_boolean (*elf_backend_write_section) 1177 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1178 1179 /* The level of IRIX compatibility we're striving for. 1180 MIPS ELF specific function. */ 1181 irix_compat_t (*elf_backend_mips_irix_compat) 1182 (bfd *); 1183 1184 reloc_howto_type *(*elf_backend_mips_rtype_to_howto) 1185 (unsigned int, bfd_boolean); 1186 1187 /* The swapping table to use when dealing with ECOFF information. 1188 Used for the MIPS ELF .mdebug section. */ 1189 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; 1190 1191 /* This function implements `bfd_elf_bfd_from_remote_memory'; 1192 see elf.c, elfcode.h. */ 1193 bfd *(*elf_backend_bfd_from_remote_memory) 1194 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1195 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, 1196 bfd_size_type len)); 1197 1198 /* This function is used by `_bfd_elf_get_synthetic_symtab'; 1199 see elf.c. */ 1200 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); 1201 1202 /* Is symbol defined in common section? */ 1203 bfd_boolean (*common_definition) (Elf_Internal_Sym *); 1204 1205 /* Return a common section index for section. */ 1206 unsigned int (*common_section_index) (asection *); 1207 1208 /* Return a common section for section. */ 1209 asection *(*common_section) (asection *); 1210 1211 /* Return TRUE if we can merge 2 definitions. */ 1212 bfd_boolean (*merge_symbol) (struct bfd_link_info *, 1213 struct elf_link_hash_entry **, 1214 struct elf_link_hash_entry *, 1215 Elf_Internal_Sym *, asection **, 1216 bfd_vma *, unsigned int *, 1217 bfd_boolean *, bfd_boolean *, 1218 bfd_boolean *, bfd_boolean *, 1219 bfd_boolean *, bfd_boolean *, 1220 bfd_boolean *, bfd_boolean *, 1221 bfd *, asection **, 1222 bfd_boolean *, bfd_boolean *, 1223 bfd_boolean *, bfd_boolean *, 1224 bfd *, asection **); 1225 1226 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 1227 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *); 1228 1229 /* Return TRUE if type is a function symbol type. */ 1230 bfd_boolean (*is_function_type) (unsigned int type); 1231 1232 /* If the ELF symbol SYM might be a function in SEC, return the 1233 function size and set *CODE_OFF to the function's entry point, 1234 otherwise return zero. */ 1235 bfd_size_type (*maybe_function_sym) (const asymbol *sym, asection *sec, 1236 bfd_vma *code_off); 1237 1238 /* Used to handle bad SHF_LINK_ORDER input. */ 1239 bfd_error_handler_type link_order_error_handler; 1240 1241 /* Name of the PLT relocation section. */ 1242 const char *relplt_name; 1243 1244 /* Alternate EM_xxxx machine codes for this backend. */ 1245 int elf_machine_alt1; 1246 int elf_machine_alt2; 1247 1248 const struct elf_size_info *s; 1249 1250 /* An array of target specific special sections. */ 1251 const struct bfd_elf_special_section *special_sections; 1252 1253 /* The size in bytes of the header for the GOT. This includes the 1254 so-called reserved entries on some systems. */ 1255 bfd_vma got_header_size; 1256 1257 /* The size of the GOT entry for the symbol pointed to by H if non-NULL, 1258 otherwise by the local symbol with index SYMNDX in IBFD. */ 1259 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *, 1260 struct elf_link_hash_entry *h, 1261 bfd *ibfd, unsigned long symndx); 1262 1263 /* The vendor name to use for a processor-standard attributes section. */ 1264 const char *obj_attrs_vendor; 1265 1266 /* The section name to use for a processor-standard attributes section. */ 1267 const char *obj_attrs_section; 1268 1269 /* Return 1, 2 or 3 to indicate what type of arguments a 1270 processor-specific tag takes. */ 1271 int (*obj_attrs_arg_type) (int); 1272 1273 /* The section type to use for an attributes section. */ 1274 unsigned int obj_attrs_section_type; 1275 1276 /* This function determines the order in which any attributes are 1277 written. It must be defined for input in the range 1278 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range 1279 is used in order to make unity easy). The returned value is the 1280 actual tag number to place in the input position. */ 1281 int (*obj_attrs_order) (int); 1282 1283 /* Handle merging unknown attributes; either warn and return TRUE, 1284 or give an error and return FALSE. */ 1285 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int); 1286 1287 /* This is non-zero if static TLS segments require a special alignment. */ 1288 unsigned static_tls_alignment; 1289 1290 /* Alignment for the PT_GNU_STACK segment. */ 1291 unsigned stack_align; 1292 1293 /* This is TRUE if the linker should act like collect and gather 1294 global constructors and destructors by name. This is TRUE for 1295 MIPS ELF because the Irix 5 tools can not handle the .init 1296 section. */ 1297 unsigned collect : 1; 1298 1299 /* This is TRUE if the linker should ignore changes to the type of a 1300 symbol. This is TRUE for MIPS ELF because some Irix 5 objects 1301 record undefined functions as STT_OBJECT although the definitions 1302 are STT_FUNC. */ 1303 unsigned type_change_ok : 1; 1304 1305 /* Whether the backend may use REL relocations. (Some backends use 1306 both REL and RELA relocations, and this flag is set for those 1307 backends.) */ 1308 unsigned may_use_rel_p : 1; 1309 1310 /* Whether the backend may use RELA relocations. (Some backends use 1311 both REL and RELA relocations, and this flag is set for those 1312 backends.) */ 1313 unsigned may_use_rela_p : 1; 1314 1315 /* Whether the default relocation type is RELA. If a backend with 1316 this flag set wants REL relocations for a particular section, 1317 it must note that explicitly. Similarly, if this flag is clear, 1318 and the backend wants RELA relocations for a particular 1319 section. */ 1320 unsigned default_use_rela_p : 1; 1321 1322 /* True if PLT and copy relocations should be RELA by default. */ 1323 unsigned rela_plts_and_copies_p : 1; 1324 1325 /* Set if RELA relocations for a relocatable link can be handled by 1326 generic code. Backends that set this flag need do nothing in the 1327 backend relocate_section routine for relocatable linking. */ 1328 unsigned rela_normal : 1; 1329 1330 /* TRUE if addresses "naturally" sign extend. This is used when 1331 swapping in from Elf32 when BFD64. */ 1332 unsigned sign_extend_vma : 1; 1333 1334 unsigned want_got_plt : 1; 1335 unsigned plt_readonly : 1; 1336 unsigned want_plt_sym : 1; 1337 unsigned plt_not_loaded : 1; 1338 unsigned plt_alignment : 4; 1339 unsigned can_gc_sections : 1; 1340 unsigned can_refcount : 1; 1341 unsigned want_got_sym : 1; 1342 unsigned want_dynbss : 1; 1343 1344 /* Targets which do not support physical addressing often require 1345 that the p_paddr field in the section header to be set to zero. 1346 This field indicates whether this behavior is required. */ 1347 unsigned want_p_paddr_set_to_zero : 1; 1348 1349 /* True if an object file lacking a .note.GNU-stack section 1350 should be assumed to be requesting exec stack. At least one 1351 other file in the link needs to have a .note.GNU-stack section 1352 for a PT_GNU_STACK segment to be created. */ 1353 unsigned default_execstack : 1; 1354 }; 1355 1356 /* Information about reloc sections associated with a bfd_elf_section_data 1357 structure. */ 1358 struct bfd_elf_section_reloc_data 1359 { 1360 /* The ELF header for the reloc section associated with this 1361 section, if any. */ 1362 Elf_Internal_Shdr *hdr; 1363 /* The number of relocations currently assigned to HDR. */ 1364 unsigned int count; 1365 /* The ELF section number of the reloc section. Only used for an 1366 output file. */ 1367 int idx; 1368 /* Used by the backend linker to store the symbol hash table entries 1369 associated with relocs against global symbols. */ 1370 struct elf_link_hash_entry **hashes; 1371 }; 1372 1373 /* Information stored for each BFD section in an ELF file. This 1374 structure is allocated by elf_new_section_hook. */ 1375 1376 struct bfd_elf_section_data 1377 { 1378 /* The ELF header for this section. */ 1379 Elf_Internal_Shdr this_hdr; 1380 1381 /* INPUT_SECTION_FLAGS if specified in the linker script. */ 1382 struct flag_info *section_flag_info; 1383 1384 /* Information about the REL and RELA reloc sections associated 1385 with this section, if any. */ 1386 struct bfd_elf_section_reloc_data rel, rela; 1387 1388 /* The ELF section number of this section. */ 1389 int this_idx; 1390 1391 /* Used by the backend linker when generating a shared library to 1392 record the dynamic symbol index for a section symbol 1393 corresponding to this section. A value of 0 means that there is 1394 no dynamic symbol for this section. */ 1395 int dynindx; 1396 1397 /* A pointer to the linked-to section for SHF_LINK_ORDER. */ 1398 asection *linked_to; 1399 1400 /* A pointer to the swapped relocs. If the section uses REL relocs, 1401 rather than RELA, all the r_addend fields will be zero. This 1402 pointer may be NULL. It is used by the backend linker. */ 1403 Elf_Internal_Rela *relocs; 1404 1405 /* A pointer to a linked list tracking dynamic relocs copied for 1406 local symbols. */ 1407 void *local_dynrel; 1408 1409 /* A pointer to the bfd section used for dynamic relocs. */ 1410 asection *sreloc; 1411 1412 union { 1413 /* Group name, if this section is a member of a group. */ 1414 const char *name; 1415 1416 /* Group signature sym, if this is the SHT_GROUP section. */ 1417 struct bfd_symbol *id; 1418 } group; 1419 1420 /* For a member of a group, points to the SHT_GROUP section. 1421 NULL for the SHT_GROUP section itself and non-group sections. */ 1422 asection *sec_group; 1423 1424 /* A linked list of member sections in the group. Circular when used by 1425 the linker. For the SHT_GROUP section, points at first member. */ 1426 asection *next_in_group; 1427 1428 /* The FDEs associated with this section. The u.fde.next_in_section 1429 field acts as a chain pointer. */ 1430 struct eh_cie_fde *fde_list; 1431 1432 /* A pointer used for various section optimizations. */ 1433 void *sec_info; 1434 }; 1435 1436 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) 1437 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) 1438 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) 1439 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) 1440 #define elf_group_name(sec) (elf_section_data(sec)->group.name) 1441 #define elf_group_id(sec) (elf_section_data(sec)->group.id) 1442 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) 1443 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list) 1444 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group) 1445 1446 #define xvec_get_elf_backend_data(xvec) \ 1447 ((const struct elf_backend_data *) (xvec)->backend_data) 1448 1449 #define get_elf_backend_data(abfd) \ 1450 xvec_get_elf_backend_data ((abfd)->xvec) 1451 1452 /* The least object attributes (within an attributes subsection) known 1453 for any target. Some code assumes that the value 0 is not used and 1454 the field for that attribute can instead be used as a marker to 1455 indicate that attributes have been initialized. */ 1456 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2 1457 1458 /* The maximum number of known object attributes for any target. */ 1459 #define NUM_KNOWN_OBJ_ATTRIBUTES 71 1460 1461 /* The value of an object attribute. The type indicates whether the attribute 1462 holds and integer, a string, or both. It can also indicate that there can 1463 be no default (i.e. all values must be written to file, even zero). */ 1464 1465 typedef struct obj_attribute 1466 { 1467 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0) 1468 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1) 1469 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2) 1470 1471 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL) 1472 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL) 1473 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT) 1474 1475 int type; 1476 unsigned int i; 1477 char *s; 1478 } obj_attribute; 1479 1480 typedef struct obj_attribute_list 1481 { 1482 struct obj_attribute_list *next; 1483 int tag; 1484 obj_attribute attr; 1485 } obj_attribute_list; 1486 1487 /* Object attributes may either be defined by the processor ABI, index 1488 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific 1489 (and possibly also processor-specific), index OBJ_ATTR_GNU. */ 1490 #define OBJ_ATTR_PROC 0 1491 #define OBJ_ATTR_GNU 1 1492 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC 1493 #define OBJ_ATTR_LAST OBJ_ATTR_GNU 1494 1495 /* The following object attribute tags are taken as generic, for all 1496 targets and for "gnu" where there is no target standard. */ 1497 enum 1498 { 1499 Tag_NULL = 0, 1500 Tag_File = 1, 1501 Tag_Section = 2, 1502 Tag_Symbol = 3, 1503 Tag_compatibility = 32 1504 }; 1505 1506 /* The following struct stores information about every SystemTap section 1507 found in the object file. */ 1508 struct sdt_note 1509 { 1510 struct sdt_note *next; 1511 bfd_size_type size; 1512 bfd_byte data[1]; 1513 }; 1514 1515 /* NT_GNU_BUILD_ID note type info for input BFDs. */ 1516 struct elf_build_id 1517 { 1518 size_t size; 1519 bfd_byte data[1]; 1520 }; 1521 1522 /* tdata information grabbed from an elf core file. */ 1523 struct core_elf_obj_tdata 1524 { 1525 int signal; 1526 int pid; 1527 int lwpid; 1528 char* program; 1529 char* command; 1530 }; 1531 1532 /* Extra tdata information held for output ELF BFDs. */ 1533 struct output_elf_obj_tdata 1534 { 1535 struct elf_segment_map *seg_map; 1536 struct elf_strtab_hash *strtab_ptr; 1537 1538 /* STT_SECTION symbols for each section */ 1539 asymbol **section_syms; 1540 1541 /* Used to determine if PT_GNU_EH_FRAME segment header should be 1542 created. */ 1543 asection *eh_frame_hdr; 1544 1545 /* NT_GNU_BUILD_ID note type info. */ 1546 struct 1547 { 1548 bfd_boolean (*after_write_object_contents) (bfd *); 1549 const char *style; 1550 asection *sec; 1551 } build_id; 1552 1553 /* Records the result of `get_program_header_size'. */ 1554 bfd_size_type program_header_size; 1555 1556 /* Used when laying out sections. */ 1557 file_ptr next_file_pos; 1558 1559 int num_section_syms; 1560 unsigned int shstrtab_section, strtab_section; 1561 1562 /* Segment flags for the PT_GNU_STACK segment. */ 1563 unsigned int stack_flags; 1564 1565 /* This is set to TRUE if the object was created by the backend 1566 linker. */ 1567 bfd_boolean linker; 1568 1569 /* Used to determine if the e_flags field has been initialized */ 1570 bfd_boolean flags_init; 1571 }; 1572 1573 /* Some private data is stashed away for future use using the tdata pointer 1574 in the bfd structure. */ 1575 1576 struct elf_obj_tdata 1577 { 1578 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ 1579 Elf_Internal_Shdr **elf_sect_ptr; 1580 Elf_Internal_Phdr *phdr; 1581 Elf_Internal_Shdr symtab_hdr; 1582 Elf_Internal_Shdr shstrtab_hdr; 1583 Elf_Internal_Shdr strtab_hdr; 1584 Elf_Internal_Shdr dynsymtab_hdr; 1585 Elf_Internal_Shdr dynstrtab_hdr; 1586 Elf_Internal_Shdr dynversym_hdr; 1587 Elf_Internal_Shdr dynverref_hdr; 1588 Elf_Internal_Shdr dynverdef_hdr; 1589 Elf_Internal_Shdr symtab_shndx_hdr; 1590 bfd_vma gp; /* The gp value */ 1591 unsigned int gp_size; /* The gp size */ 1592 unsigned int num_elf_sections; /* elf_sect_ptr size */ 1593 1594 /* A mapping from external symbols to entries in the linker hash 1595 table, used when linking. This is indexed by the symbol index 1596 minus the sh_info field of the symbol table header. */ 1597 struct elf_link_hash_entry **sym_hashes; 1598 1599 /* Track usage and final offsets of GOT entries for local symbols. 1600 This array is indexed by symbol index. Elements are used 1601 identically to "got" in struct elf_link_hash_entry. */ 1602 union 1603 { 1604 bfd_signed_vma *refcounts; 1605 bfd_vma *offsets; 1606 struct got_entry **ents; 1607 } local_got; 1608 1609 /* The linker ELF emulation code needs to let the backend ELF linker 1610 know what filename should be used for a dynamic object if the 1611 dynamic object is found using a search. The emulation code then 1612 sometimes needs to know what name was actually used. Until the 1613 file has been added to the linker symbol table, this field holds 1614 the name the linker wants. After it has been added, it holds the 1615 name actually used, which will be the DT_SONAME entry if there is 1616 one. */ 1617 const char *dt_name; 1618 1619 /* The linker emulation needs to know what audit libs 1620 are used by a dynamic object. */ 1621 const char *dt_audit; 1622 1623 /* Used by find_nearest_line entry point. */ 1624 void *line_info; 1625 1626 /* A place to stash dwarf1 info for this bfd. */ 1627 struct dwarf1_debug *dwarf1_find_line_info; 1628 1629 /* A place to stash dwarf2 info for this bfd. */ 1630 void *dwarf2_find_line_info; 1631 1632 /* Stash away info for yet another find line/function variant. */ 1633 void *elf_find_function_cache; 1634 1635 /* Number of symbol version definitions we are about to emit. */ 1636 unsigned int cverdefs; 1637 1638 /* Number of symbol version references we are about to emit. */ 1639 unsigned int cverrefs; 1640 1641 /* Symbol version definitions in external objects. */ 1642 Elf_Internal_Verdef *verdef; 1643 1644 /* Symbol version references to external objects. */ 1645 Elf_Internal_Verneed *verref; 1646 1647 /* A pointer to the .eh_frame section. */ 1648 asection *eh_frame_section; 1649 1650 /* Symbol buffer. */ 1651 void *symbuf; 1652 1653 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES]; 1654 obj_attribute_list *other_obj_attributes[2]; 1655 1656 /* NT_GNU_BUILD_ID note type. */ 1657 struct elf_build_id *build_id; 1658 1659 /* Linked-list containing information about every Systemtap section 1660 found in the object file. Each section corresponds to one entry 1661 in the list. */ 1662 struct sdt_note *sdt_note_head; 1663 1664 Elf_Internal_Shdr **group_sect_ptr; 1665 int num_group; 1666 1667 unsigned int symtab_section, symtab_shndx_section, dynsymtab_section; 1668 unsigned int dynversym_section, dynverdef_section, dynverref_section; 1669 1670 /* An identifier used to distinguish different target 1671 specific extensions to this structure. */ 1672 enum elf_target_id object_id; 1673 1674 /* Whether a dyanmic object was specified normally on the linker 1675 command line, or was specified when --as-needed was in effect, 1676 or was found via a DT_NEEDED entry. */ 1677 enum dynamic_lib_link_class dyn_lib_class; 1678 1679 /* Irix 5 often screws up the symbol table, sorting local symbols 1680 after global symbols. This flag is set if the symbol table in 1681 this BFD appears to be screwed up. If it is, we ignore the 1682 sh_info field in the symbol table header, and always read all the 1683 symbols. */ 1684 bfd_boolean bad_symtab; 1685 1686 /* True if the bfd contains symbols that have the STT_GNU_IFUNC 1687 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi 1688 field in the ELF header structure. */ 1689 bfd_boolean has_gnu_symbols; 1690 1691 /* Information grabbed from an elf core file. */ 1692 struct core_elf_obj_tdata *core; 1693 1694 /* More information held for output ELF BFDs. */ 1695 struct output_elf_obj_tdata *o; 1696 }; 1697 1698 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) 1699 1700 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id) 1701 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size) 1702 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) 1703 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) 1704 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) 1705 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map) 1706 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos) 1707 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr) 1708 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker) 1709 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags) 1710 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr) 1711 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) 1712 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) 1713 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section) 1714 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section) 1715 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr) 1716 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) 1717 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section) 1718 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section) 1719 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section) 1720 #define elf_eh_frame_section(bfd) \ 1721 (elf_tdata(bfd) -> eh_frame_section) 1722 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms) 1723 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms) 1724 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) 1725 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) 1726 #define elf_gp(bfd) (elf_tdata(bfd) -> gp) 1727 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) 1728 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) 1729 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) 1730 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) 1731 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) 1732 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) 1733 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit) 1734 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) 1735 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) 1736 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init) 1737 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes) 1738 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes) 1739 #define elf_known_obj_attributes_proc(bfd) \ 1740 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1741 #define elf_other_obj_attributes_proc(bfd) \ 1742 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1743 1744 extern void _bfd_elf_swap_verdef_in 1746 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); 1747 extern void _bfd_elf_swap_verdef_out 1748 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); 1749 extern void _bfd_elf_swap_verdaux_in 1750 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); 1751 extern void _bfd_elf_swap_verdaux_out 1752 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); 1753 extern void _bfd_elf_swap_verneed_in 1754 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); 1755 extern void _bfd_elf_swap_verneed_out 1756 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); 1757 extern void _bfd_elf_swap_vernaux_in 1758 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); 1759 extern void _bfd_elf_swap_vernaux_out 1760 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); 1761 extern void _bfd_elf_swap_versym_in 1762 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); 1763 extern void _bfd_elf_swap_versym_out 1764 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); 1765 1766 extern unsigned int _bfd_elf_section_from_bfd_section 1767 (bfd *, asection *); 1768 extern char *bfd_elf_string_from_elf_section 1769 (bfd *, unsigned, unsigned); 1770 extern Elf_Internal_Sym *bfd_elf_get_elf_syms 1771 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, 1772 Elf_External_Sym_Shndx *); 1773 extern const char *bfd_elf_sym_name 1774 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); 1775 1776 extern bfd_boolean _bfd_elf_copy_private_bfd_data 1777 (bfd *, bfd *); 1778 extern bfd_boolean _bfd_elf_print_private_bfd_data 1779 (bfd *, void *); 1780 extern void bfd_elf_print_symbol 1781 (bfd *, void *, asymbol *, bfd_print_symbol_type); 1782 1783 extern unsigned int _bfd_elf_eh_frame_address_size 1784 (bfd *, asection *); 1785 extern bfd_byte _bfd_elf_encode_eh_address 1786 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, 1787 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); 1788 extern bfd_boolean _bfd_elf_can_make_relative 1789 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); 1790 1791 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class 1792 (const Elf_Internal_Rela *); 1793 extern bfd_vma _bfd_elf_rela_local_sym 1794 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); 1795 extern bfd_vma _bfd_elf_rel_local_sym 1796 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); 1797 extern bfd_vma _bfd_elf_section_offset 1798 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1799 1800 extern unsigned long bfd_elf_hash 1801 (const char *); 1802 extern unsigned long bfd_elf_gnu_hash 1803 (const char *); 1804 1805 extern bfd_reloc_status_type bfd_elf_generic_reloc 1806 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 1807 extern bfd_boolean bfd_elf_allocate_object 1808 (bfd *, size_t, enum elf_target_id); 1809 extern bfd_boolean bfd_elf_make_object 1810 (bfd *); 1811 extern bfd_boolean bfd_elf_mkcorefile 1812 (bfd *); 1813 extern bfd_boolean _bfd_elf_make_section_from_shdr 1814 (bfd *, Elf_Internal_Shdr *, const char *, int); 1815 extern bfd_boolean _bfd_elf_make_section_from_phdr 1816 (bfd *, Elf_Internal_Phdr *, int, const char *); 1817 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc 1818 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 1819 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create 1820 (bfd *); 1821 extern void _bfd_elf_link_hash_table_free 1822 (struct bfd_link_hash_table *); 1823 extern void _bfd_elf_link_hash_copy_indirect 1824 (struct bfd_link_info *, struct elf_link_hash_entry *, 1825 struct elf_link_hash_entry *); 1826 extern void _bfd_elf_link_hash_hide_symbol 1827 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1828 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol 1829 (struct bfd_link_info *, struct elf_link_hash_entry *); 1830 extern bfd_boolean _bfd_elf_link_hash_table_init 1831 (struct elf_link_hash_table *, bfd *, 1832 struct bfd_hash_entry *(*) 1833 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *), 1834 unsigned int, enum elf_target_id); 1835 extern bfd_boolean _bfd_elf_slurp_version_tables 1836 (bfd *, bfd_boolean); 1837 extern bfd_boolean _bfd_elf_merge_sections 1838 (bfd *, struct bfd_link_info *); 1839 extern bfd_boolean _bfd_elf_match_sections_by_type 1840 (bfd *, const asection *, bfd *, const asection *); 1841 extern bfd_boolean bfd_elf_is_group_section 1842 (bfd *, const struct bfd_section *); 1843 extern bfd_boolean _bfd_elf_section_already_linked 1844 (bfd *, asection *, struct bfd_link_info *); 1845 extern void bfd_elf_set_group_contents 1846 (bfd *, asection *, void *); 1847 extern asection *_bfd_elf_check_kept_section 1848 (asection *, struct bfd_link_info *); 1849 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms 1850 extern void _bfd_elf_copy_link_hash_symbol_type 1851 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *); 1852 extern bfd_boolean _bfd_elf_size_group_sections 1853 (struct bfd_link_info *); 1854 extern bfd_boolean _bfd_elf_fixup_group_sections 1855 (bfd *, asection *); 1856 extern bfd_boolean _bfd_elf_copy_private_header_data 1857 (bfd *, bfd *); 1858 extern bfd_boolean _bfd_elf_copy_private_symbol_data 1859 (bfd *, asymbol *, bfd *, asymbol *); 1860 #define _bfd_generic_init_private_section_data \ 1861 _bfd_elf_init_private_section_data 1862 extern bfd_boolean _bfd_elf_init_private_section_data 1863 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); 1864 extern bfd_boolean _bfd_elf_copy_private_section_data 1865 (bfd *, asection *, bfd *, asection *); 1866 extern bfd_boolean _bfd_elf_write_object_contents 1867 (bfd *); 1868 extern bfd_boolean _bfd_elf_write_corefile_contents 1869 (bfd *); 1870 extern bfd_boolean _bfd_elf_set_section_contents 1871 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 1872 extern long _bfd_elf_get_symtab_upper_bound 1873 (bfd *); 1874 extern long _bfd_elf_canonicalize_symtab 1875 (bfd *, asymbol **); 1876 extern long _bfd_elf_get_dynamic_symtab_upper_bound 1877 (bfd *); 1878 extern long _bfd_elf_canonicalize_dynamic_symtab 1879 (bfd *, asymbol **); 1880 extern long _bfd_elf_get_synthetic_symtab 1881 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 1882 extern long _bfd_elf_get_reloc_upper_bound 1883 (bfd *, sec_ptr); 1884 extern long _bfd_elf_canonicalize_reloc 1885 (bfd *, sec_ptr, arelent **, asymbol **); 1886 extern asection * _bfd_elf_get_dynamic_reloc_section 1887 (bfd *, asection *, bfd_boolean); 1888 extern asection * _bfd_elf_make_dynamic_reloc_section 1889 (asection *, bfd *, unsigned int, bfd *, bfd_boolean); 1890 extern long _bfd_elf_get_dynamic_reloc_upper_bound 1891 (bfd *); 1892 extern long _bfd_elf_canonicalize_dynamic_reloc 1893 (bfd *, arelent **, asymbol **); 1894 extern asymbol *_bfd_elf_make_empty_symbol 1895 (bfd *); 1896 extern void _bfd_elf_get_symbol_info 1897 (bfd *, asymbol *, symbol_info *); 1898 extern bfd_boolean _bfd_elf_is_local_label_name 1899 (bfd *, const char *); 1900 extern alent *_bfd_elf_get_lineno 1901 (bfd *, asymbol *); 1902 extern bfd_boolean _bfd_elf_set_arch_mach 1903 (bfd *, enum bfd_architecture, unsigned long); 1904 extern bfd_boolean _bfd_elf_find_nearest_line 1905 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1906 unsigned int *); 1907 extern bfd_boolean _bfd_elf_find_nearest_line_discriminator 1908 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1909 unsigned int *, unsigned int *); 1910 extern bfd_boolean _bfd_elf_find_line 1911 (bfd *, asymbol **, asymbol *, const char **, unsigned int *); 1912 extern bfd_boolean _bfd_elf_find_line_discriminator 1913 (bfd *, asymbol **, asymbol *, const char **, unsigned int *, unsigned int *); 1914 #define _bfd_generic_find_line _bfd_elf_find_line 1915 #define _bfd_generic_find_nearest_line_discriminator \ 1916 _bfd_elf_find_nearest_line_discriminator 1917 extern bfd_boolean _bfd_elf_find_inliner_info 1918 (bfd *, const char **, const char **, unsigned int *); 1919 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols 1920 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 1921 extern int _bfd_elf_sizeof_headers 1922 (bfd *, struct bfd_link_info *); 1923 extern bfd_boolean _bfd_elf_new_section_hook 1924 (bfd *, asection *); 1925 extern bfd_boolean _bfd_elf_init_reloc_shdr 1926 (bfd *, struct bfd_elf_section_reloc_data *, asection *, bfd_boolean); 1927 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section 1928 (const char *, const struct bfd_elf_special_section *, unsigned int); 1929 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr 1930 (bfd *, asection *); 1931 1932 /* If the target doesn't have reloc handling written yet: */ 1933 extern void _bfd_elf_no_info_to_howto 1934 (bfd *, arelent *, Elf_Internal_Rela *); 1935 1936 extern bfd_boolean bfd_section_from_shdr 1937 (bfd *, unsigned int shindex); 1938 extern bfd_boolean bfd_section_from_phdr 1939 (bfd *, Elf_Internal_Phdr *, int); 1940 1941 extern int _bfd_elf_symbol_from_bfd_symbol 1942 (bfd *, asymbol **); 1943 1944 extern Elf_Internal_Sym *bfd_sym_from_r_symndx 1945 (struct sym_cache *, bfd *, unsigned long); 1946 extern asection *bfd_section_from_elf_index 1947 (bfd *, unsigned int); 1948 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init 1949 (void); 1950 1951 extern struct elf_strtab_hash * _bfd_elf_strtab_init 1952 (void); 1953 extern void _bfd_elf_strtab_free 1954 (struct elf_strtab_hash *); 1955 extern bfd_size_type _bfd_elf_strtab_add 1956 (struct elf_strtab_hash *, const char *, bfd_boolean); 1957 extern void _bfd_elf_strtab_addref 1958 (struct elf_strtab_hash *, bfd_size_type); 1959 extern void _bfd_elf_strtab_delref 1960 (struct elf_strtab_hash *, bfd_size_type); 1961 extern unsigned int _bfd_elf_strtab_refcount 1962 (struct elf_strtab_hash *, bfd_size_type); 1963 extern void _bfd_elf_strtab_clear_all_refs 1964 (struct elf_strtab_hash *tab); 1965 extern void _bfd_elf_strtab_restore_size 1966 (struct elf_strtab_hash *, bfd_size_type); 1967 extern bfd_size_type _bfd_elf_strtab_size 1968 (struct elf_strtab_hash *); 1969 extern bfd_size_type _bfd_elf_strtab_offset 1970 (struct elf_strtab_hash *, bfd_size_type); 1971 extern bfd_boolean _bfd_elf_strtab_emit 1972 (bfd *, struct elf_strtab_hash *); 1973 extern void _bfd_elf_strtab_finalize 1974 (struct elf_strtab_hash *); 1975 1976 extern void _bfd_elf_begin_eh_frame_parsing 1977 (struct bfd_link_info *info); 1978 extern void _bfd_elf_parse_eh_frame 1979 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *); 1980 extern void _bfd_elf_end_eh_frame_parsing 1981 (struct bfd_link_info *info); 1982 1983 extern bfd_boolean _bfd_elf_discard_section_eh_frame 1984 (bfd *, struct bfd_link_info *, asection *, 1985 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); 1986 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr 1987 (bfd *, struct bfd_link_info *); 1988 extern bfd_vma _bfd_elf_eh_frame_section_offset 1989 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1990 extern bfd_boolean _bfd_elf_write_section_eh_frame 1991 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1992 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr 1993 (bfd *, struct bfd_link_info *); 1994 extern bfd_boolean _bfd_elf_eh_frame_present 1995 (struct bfd_link_info *); 1996 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr 1997 (struct bfd_link_info *); 1998 1999 extern bfd_boolean _bfd_elf_merge_symbol 2000 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, 2001 asection **, bfd_vma *, bfd_boolean *, unsigned int *, 2002 struct elf_link_hash_entry **, bfd_boolean *, 2003 bfd_boolean *, bfd_boolean *, bfd_boolean *); 2004 2005 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); 2006 2007 extern long _bfd_elf_link_lookup_local_dynindx 2008 (struct bfd_link_info *, bfd *, long); 2009 extern bfd_boolean _bfd_elf_compute_section_file_positions 2010 (bfd *, struct bfd_link_info *); 2011 extern void _bfd_elf_assign_file_positions_for_relocs 2012 (bfd *); 2013 extern file_ptr _bfd_elf_assign_file_position_for_section 2014 (Elf_Internal_Shdr *, file_ptr, bfd_boolean); 2015 2016 extern bfd_boolean _bfd_elf_validate_reloc 2017 (bfd *, arelent *); 2018 2019 extern bfd_boolean _bfd_elf_link_create_dynamic_sections 2020 (bfd *, struct bfd_link_info *); 2021 extern bfd_boolean _bfd_elf_link_omit_section_dynsym 2022 (bfd *, struct bfd_link_info *, asection *); 2023 extern bfd_boolean _bfd_elf_create_dynamic_sections 2024 (bfd *, struct bfd_link_info *); 2025 extern bfd_boolean _bfd_elf_create_got_section 2026 (bfd *, struct bfd_link_info *); 2027 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym 2028 (bfd *, struct bfd_link_info *, asection *, const char *); 2029 extern void _bfd_elf_init_1_index_section 2030 (bfd *, struct bfd_link_info *); 2031 extern void _bfd_elf_init_2_index_sections 2032 (bfd *, struct bfd_link_info *); 2033 2034 extern bfd_boolean _bfd_elfcore_make_pseudosection 2035 (bfd *, char *, size_t, ufile_ptr); 2036 extern char *_bfd_elfcore_strndup 2037 (bfd *, char *, size_t); 2038 2039 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs 2040 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); 2041 2042 extern bfd_boolean _bfd_elf_link_output_relocs 2043 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 2044 struct elf_link_hash_entry **); 2045 2046 extern bfd_boolean _bfd_elf_adjust_dynamic_copy 2047 (struct elf_link_hash_entry *, asection *); 2048 2049 extern bfd_boolean _bfd_elf_dynamic_symbol_p 2050 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 2051 2052 extern bfd_boolean _bfd_elf_symbol_refs_local_p 2053 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 2054 2055 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation 2056 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma); 2057 2058 extern bfd_boolean _bfd_elf_setup_sections 2059 (bfd *); 2060 2061 extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *); 2062 2063 extern const bfd_target *bfd_elf32_object_p 2064 (bfd *); 2065 extern const bfd_target *bfd_elf32_core_file_p 2066 (bfd *); 2067 extern char *bfd_elf32_core_file_failing_command 2068 (bfd *); 2069 extern int bfd_elf32_core_file_failing_signal 2070 (bfd *); 2071 extern bfd_boolean bfd_elf32_core_file_matches_executable_p 2072 (bfd *, bfd *); 2073 extern int bfd_elf32_core_file_pid 2074 (bfd *); 2075 2076 extern bfd_boolean bfd_elf32_swap_symbol_in 2077 (bfd *, const void *, const void *, Elf_Internal_Sym *); 2078 extern void bfd_elf32_swap_symbol_out 2079 (bfd *, const Elf_Internal_Sym *, void *, void *); 2080 extern void bfd_elf32_swap_reloc_in 2081 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2082 extern void bfd_elf32_swap_reloc_out 2083 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2084 extern void bfd_elf32_swap_reloca_in 2085 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2086 extern void bfd_elf32_swap_reloca_out 2087 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2088 extern void bfd_elf32_swap_phdr_in 2089 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); 2090 extern void bfd_elf32_swap_phdr_out 2091 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); 2092 extern void bfd_elf32_swap_dyn_in 2093 (bfd *, const void *, Elf_Internal_Dyn *); 2094 extern void bfd_elf32_swap_dyn_out 2095 (bfd *, const Elf_Internal_Dyn *, void *); 2096 extern long bfd_elf32_slurp_symbol_table 2097 (bfd *, asymbol **, bfd_boolean); 2098 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr 2099 (bfd *); 2100 extern int bfd_elf32_write_out_phdrs 2101 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2102 extern bfd_boolean bfd_elf32_checksum_contents 2103 (bfd * , void (*) (const void *, size_t, void *), void *); 2104 extern void bfd_elf32_write_relocs 2105 (bfd *, asection *, void *); 2106 extern bfd_boolean bfd_elf32_slurp_reloc_table 2107 (bfd *, asection *, asymbol **, bfd_boolean); 2108 2109 extern const bfd_target *bfd_elf64_object_p 2110 (bfd *); 2111 extern const bfd_target *bfd_elf64_core_file_p 2112 (bfd *); 2113 extern char *bfd_elf64_core_file_failing_command 2114 (bfd *); 2115 extern int bfd_elf64_core_file_failing_signal 2116 (bfd *); 2117 extern bfd_boolean bfd_elf64_core_file_matches_executable_p 2118 (bfd *, bfd *); 2119 extern int bfd_elf64_core_file_pid 2120 (bfd *); 2121 2122 extern bfd_boolean bfd_elf64_swap_symbol_in 2123 (bfd *, const void *, const void *, Elf_Internal_Sym *); 2124 extern void bfd_elf64_swap_symbol_out 2125 (bfd *, const Elf_Internal_Sym *, void *, void *); 2126 extern void bfd_elf64_swap_reloc_in 2127 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2128 extern void bfd_elf64_swap_reloc_out 2129 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2130 extern void bfd_elf64_swap_reloca_in 2131 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2132 extern void bfd_elf64_swap_reloca_out 2133 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2134 extern void bfd_elf64_swap_phdr_in 2135 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); 2136 extern void bfd_elf64_swap_phdr_out 2137 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); 2138 extern void bfd_elf64_swap_dyn_in 2139 (bfd *, const void *, Elf_Internal_Dyn *); 2140 extern void bfd_elf64_swap_dyn_out 2141 (bfd *, const Elf_Internal_Dyn *, void *); 2142 extern long bfd_elf64_slurp_symbol_table 2143 (bfd *, asymbol **, bfd_boolean); 2144 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr 2145 (bfd *); 2146 extern int bfd_elf64_write_out_phdrs 2147 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2148 extern bfd_boolean bfd_elf64_checksum_contents 2149 (bfd * , void (*) (const void *, size_t, void *), void *); 2150 extern void bfd_elf64_write_relocs 2151 (bfd *, asection *, void *); 2152 extern bfd_boolean bfd_elf64_slurp_reloc_table 2153 (bfd *, asection *, asymbol **, bfd_boolean); 2154 2155 extern bfd_boolean _bfd_elf_default_relocs_compatible 2156 (const bfd_target *, const bfd_target *); 2157 2158 extern bfd_boolean _bfd_elf_relocs_compatible 2159 (const bfd_target *, const bfd_target *); 2160 2161 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup 2162 (bfd *, struct bfd_link_info *, const char *); 2163 extern bfd_boolean bfd_elf_link_add_symbols 2164 (bfd *, struct bfd_link_info *); 2165 extern bfd_boolean _bfd_elf_add_dynamic_entry 2166 (struct bfd_link_info *, bfd_vma, bfd_vma); 2167 2168 extern bfd_boolean bfd_elf_link_record_dynamic_symbol 2169 (struct bfd_link_info *, struct elf_link_hash_entry *); 2170 2171 extern int bfd_elf_link_record_local_dynamic_symbol 2172 (struct bfd_link_info *, bfd *, long); 2173 2174 extern bfd_boolean _bfd_elf_close_and_cleanup 2175 (bfd *); 2176 2177 extern bfd_boolean _bfd_elf_common_definition 2178 (Elf_Internal_Sym *); 2179 2180 extern unsigned int _bfd_elf_common_section_index 2181 (asection *); 2182 2183 extern asection *_bfd_elf_common_section 2184 (asection *); 2185 2186 extern bfd_vma _bfd_elf_default_got_elt_size 2187 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *, 2188 unsigned long); 2189 2190 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 2191 (bfd *, arelent *, struct bfd_symbol *, void *, 2192 asection *, bfd *, char **); 2193 2194 extern bfd_boolean bfd_elf_final_link 2195 (bfd *, struct bfd_link_info *); 2196 2197 extern void _bfd_elf_gc_keep 2198 (struct bfd_link_info *info); 2199 2200 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol 2201 (struct elf_link_hash_entry *h, void *inf); 2202 2203 extern bfd_boolean bfd_elf_gc_sections 2204 (bfd *, struct bfd_link_info *); 2205 2206 extern bfd_boolean bfd_elf_gc_record_vtinherit 2207 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2208 2209 extern bfd_boolean bfd_elf_gc_record_vtentry 2210 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2211 2212 extern asection *_bfd_elf_gc_mark_hook 2213 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 2214 struct elf_link_hash_entry *, Elf_Internal_Sym *); 2215 2216 extern asection *_bfd_elf_gc_mark_rsec 2217 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2218 struct elf_reloc_cookie *); 2219 2220 extern bfd_boolean _bfd_elf_gc_mark_reloc 2221 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2222 struct elf_reloc_cookie *); 2223 2224 extern bfd_boolean _bfd_elf_gc_mark_fdes 2225 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn, 2226 struct elf_reloc_cookie *); 2227 2228 extern bfd_boolean _bfd_elf_gc_mark 2229 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn); 2230 2231 extern bfd_boolean _bfd_elf_gc_mark_extra_sections 2232 (struct bfd_link_info *, elf_gc_mark_hook_fn); 2233 2234 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets 2235 (bfd *, struct bfd_link_info *); 2236 2237 extern bfd_boolean bfd_elf_gc_common_final_link 2238 (bfd *, struct bfd_link_info *); 2239 2240 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p 2241 (bfd_vma, void *); 2242 2243 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment 2244 (bfd *, asection *); 2245 2246 extern bfd_boolean _bfd_elf_map_sections_to_segments 2247 (bfd *, struct bfd_link_info *); 2248 2249 extern bfd_boolean _bfd_elf_is_function_type (unsigned int); 2250 2251 extern bfd_size_type _bfd_elf_maybe_function_sym (const asymbol *, asection *, 2252 bfd_vma *); 2253 2254 extern int bfd_elf_get_default_section_type (flagword); 2255 2256 extern bfd_boolean bfd_elf_lookup_section_flags 2257 (struct bfd_link_info *, struct flag_info *, asection *); 2258 2259 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section 2260 (bfd * abfd, asection * section); 2261 2262 /* Exported interface for writing elf corefile notes. */ 2263 extern char *elfcore_write_note 2264 (bfd *, char *, int *, const char *, int, const void *, int); 2265 extern char *elfcore_write_prpsinfo 2266 (bfd *, char *, int *, const char *, const char *); 2267 extern char *elfcore_write_prstatus 2268 (bfd *, char *, int *, long, int, const void *); 2269 extern char * elfcore_write_pstatus 2270 (bfd *, char *, int *, long, int, const void *); 2271 extern char *elfcore_write_prfpreg 2272 (bfd *, char *, int *, const void *, int); 2273 extern char *elfcore_write_prxfpreg 2274 (bfd *, char *, int *, const void *, int); 2275 extern char *elfcore_write_xstatereg 2276 (bfd *, char *, int *, const void *, int); 2277 extern char *elfcore_write_ppc_vmx 2278 (bfd *, char *, int *, const void *, int); 2279 extern char *elfcore_write_ppc_vsx 2280 (bfd *, char *, int *, const void *, int); 2281 extern char *elfcore_write_s390_timer 2282 (bfd *, char *, int *, const void *, int); 2283 extern char *elfcore_write_s390_todcmp 2284 (bfd *, char *, int *, const void *, int); 2285 extern char *elfcore_write_s390_todpreg 2286 (bfd *, char *, int *, const void *, int); 2287 extern char *elfcore_write_s390_ctrs 2288 (bfd *, char *, int *, const void *, int); 2289 extern char *elfcore_write_s390_prefix 2290 (bfd *, char *, int *, const void *, int); 2291 extern char *elfcore_write_s390_last_break 2292 (bfd *, char *, int *, const void *, int); 2293 extern char *elfcore_write_s390_system_call 2294 (bfd *, char *, int *, const void *, int); 2295 extern char *elfcore_write_s390_tdb 2296 (bfd *, char *, int *, const void *, int); 2297 extern char *elfcore_write_arm_vfp 2298 (bfd *, char *, int *, const void *, int); 2299 extern char *elfcore_write_aarch_tls 2300 (bfd *, char *, int *, const void *, int); 2301 extern char *elfcore_write_aarch_hw_break 2302 (bfd *, char *, int *, const void *, int); 2303 extern char *elfcore_write_aarch_hw_watch 2304 (bfd *, char *, int *, const void *, int); 2305 extern char *elfcore_write_lwpstatus 2306 (bfd *, char *, int *, long, int, const void *); 2307 extern char *elfcore_write_register_note 2308 (bfd *, char *, int *, const char *, const void *, int); 2309 2310 /* Internal structure which holds information to be included in the 2311 PRPSINFO section of Linux core files. 2312 2313 This is an "internal" structure in the sense that it should be used 2314 to pass information to BFD (via the `elfcore_write_linux_prpsinfo' 2315 function), so things like endianess shouldn't be an issue. This 2316 structure will eventually be converted in one of the 2317 `elf_external_linux_*' structures and written out to an output bfd 2318 by one of the functions declared below. */ 2319 2320 struct elf_internal_linux_prpsinfo 2321 { 2322 char pr_state; /* Numeric process state. */ 2323 char pr_sname; /* Char for pr_state. */ 2324 char pr_zomb; /* Zombie. */ 2325 char pr_nice; /* Nice val. */ 2326 unsigned long pr_flag; /* Flags. */ 2327 unsigned int pr_uid; 2328 unsigned int pr_gid; 2329 int pr_pid, pr_ppid, pr_pgrp, pr_sid; 2330 char pr_fname[16 + 1]; /* Filename of executable. */ 2331 char pr_psargs[80 + 1]; /* Initial part of arg list. */ 2332 }; 2333 2334 /* Linux/most 32-bit archs. */ 2335 extern char *elfcore_write_linux_prpsinfo32 2336 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *); 2337 2338 /* Linux/most 64-bit archs. */ 2339 extern char *elfcore_write_linux_prpsinfo64 2340 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *); 2341 2342 /* Linux/PPC32 uses different layout compared to most archs. */ 2343 extern char *elfcore_write_ppc_linux_prpsinfo32 2344 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *); 2345 2346 extern bfd *_bfd_elf32_bfd_from_remote_memory 2347 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2348 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)); 2349 extern bfd *_bfd_elf64_bfd_from_remote_memory 2350 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2351 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)); 2352 2353 extern bfd_vma bfd_elf_obj_attr_size (bfd *); 2354 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma); 2355 extern int bfd_elf_get_obj_attr_int (bfd *, int, int); 2356 extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int); 2357 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \ 2358 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2359 extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *); 2360 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \ 2361 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2362 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int, 2363 const char *); 2364 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \ 2365 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \ 2366 (INTVAL), (STRVAL)) 2367 2368 extern char *_bfd_elf_attr_strdup (bfd *, const char *); 2369 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *); 2370 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int); 2371 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *); 2372 extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *); 2373 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int); 2374 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *); 2375 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec); 2376 2377 /* The linker may need to keep track of the number of relocs that it 2378 decides to copy as dynamic relocs in check_relocs for each symbol. 2379 This is so that it can later discard them if they are found to be 2380 unnecessary. We can store the information in a field extending the 2381 regular ELF linker hash table. */ 2382 2383 struct elf_dyn_relocs 2384 { 2385 struct elf_dyn_relocs *next; 2386 2387 /* The input section of the reloc. */ 2388 asection *sec; 2389 2390 /* Total number of relocs copied for the input section. */ 2391 bfd_size_type count; 2392 2393 /* Number of pc-relative relocs copied for the input section. */ 2394 bfd_size_type pc_count; 2395 }; 2396 2397 extern bfd_boolean _bfd_elf_create_ifunc_sections 2398 (bfd *, struct bfd_link_info *); 2399 extern asection * _bfd_elf_create_ifunc_dyn_reloc 2400 (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc, 2401 struct elf_dyn_relocs **); 2402 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs 2403 (struct bfd_link_info *, struct elf_link_hash_entry *, 2404 struct elf_dyn_relocs **, unsigned int, unsigned int); 2405 2406 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *); 2407 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *); 2408 2409 extern bfd_vma elf64_r_info (bfd_vma, bfd_vma); 2410 extern bfd_vma elf64_r_sym (bfd_vma); 2411 extern bfd_vma elf32_r_info (bfd_vma, bfd_vma); 2412 extern bfd_vma elf32_r_sym (bfd_vma); 2413 2414 /* Large common section. */ 2415 extern asection _bfd_elf_large_com_section; 2416 2417 /* Hash for local symbol with the first section id, ID, in the input 2418 file and the local symbol index, SYM. */ 2419 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \ 2420 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \ 2421 ^ (SYM) ^ ((ID) >> 16)) 2422 2423 /* This is the condition under which finish_dynamic_symbol will be called. 2424 If our finish_dynamic_symbol isn't called, we'll need to do something 2425 about initializing any .plt and .got entries in relocate_section. */ 2426 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ 2427 ((DYN) \ 2428 && ((SHARED) || !(H)->forced_local) \ 2429 && ((H)->dynindx != -1 || (H)->forced_local)) 2430 2431 /* This macro is to avoid lots of duplicated code in the body 2432 of xxx_relocate_section() in the various elfxx-xxxx.c files. */ 2433 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ 2434 r_symndx, symtab_hdr, sym_hashes, \ 2435 h, sec, relocation, \ 2436 unresolved_reloc, warned) \ 2437 do \ 2438 { \ 2439 /* It seems this can happen with erroneous or unsupported \ 2440 input (mixing a.out and elf in an archive, for example.) */ \ 2441 if (sym_hashes == NULL) \ 2442 return FALSE; \ 2443 \ 2444 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ 2445 \ 2446 while (h->root.type == bfd_link_hash_indirect \ 2447 || h->root.type == bfd_link_hash_warning) \ 2448 h = (struct elf_link_hash_entry *) h->root.u.i.link; \ 2449 \ 2450 warned = FALSE; \ 2451 unresolved_reloc = FALSE; \ 2452 relocation = 0; \ 2453 if (h->root.type == bfd_link_hash_defined \ 2454 || h->root.type == bfd_link_hash_defweak) \ 2455 { \ 2456 sec = h->root.u.def.section; \ 2457 if (sec == NULL \ 2458 || sec->output_section == NULL) \ 2459 /* Set a flag that will be cleared later if we find a \ 2460 relocation value for this symbol. output_section \ 2461 is typically NULL for symbols satisfied by a shared \ 2462 library. */ \ 2463 unresolved_reloc = TRUE; \ 2464 else \ 2465 relocation = (h->root.u.def.value \ 2466 + sec->output_section->vma \ 2467 + sec->output_offset); \ 2468 } \ 2469 else if (h->root.type == bfd_link_hash_undefweak) \ 2470 ; \ 2471 else if (info->unresolved_syms_in_objects == RM_IGNORE \ 2472 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ 2473 ; \ 2474 else if (!info->relocatable) \ 2475 { \ 2476 bfd_boolean err; \ 2477 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ 2478 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ 2479 if (!info->callbacks->undefined_symbol (info, \ 2480 h->root.root.string, \ 2481 input_bfd, \ 2482 input_section, \ 2483 rel->r_offset, err)) \ 2484 return FALSE; \ 2485 warned = TRUE; \ 2486 } \ 2487 (void) unresolved_reloc; \ 2488 (void) warned; \ 2489 } \ 2490 while (0) 2491 2492 /* This macro is to avoid lots of duplicated code in the body of the 2493 loop over relocations in xxx_relocate_section() in the various 2494 elfxx-xxxx.c files. 2495 2496 Handle relocations against symbols from removed linkonce sections, 2497 or sections discarded by a linker script. When doing a relocatable 2498 link, we remove such relocations. Otherwise, we just want the 2499 section contents zeroed and avoid any special processing. */ 2500 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ 2501 rel, count, relend, \ 2502 howto, index, contents) \ 2503 { \ 2504 int i_; \ 2505 _bfd_clear_contents (howto, input_bfd, input_section, \ 2506 contents + rel[index].r_offset); \ 2507 \ 2508 if (info->relocatable \ 2509 && (input_section->flags & SEC_DEBUGGING)) \ 2510 { \ 2511 /* Only remove relocations in debug sections since other \ 2512 sections may require relocations. */ \ 2513 Elf_Internal_Shdr *rel_hdr; \ 2514 \ 2515 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ 2516 \ 2517 /* Avoid empty output section. */ \ 2518 if (rel_hdr->sh_size > count * rel_hdr->sh_entsize) \ 2519 { \ 2520 rel_hdr->sh_size -= count * rel_hdr->sh_entsize; \ 2521 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ 2522 rel_hdr->sh_size -= count * rel_hdr->sh_entsize; \ 2523 \ 2524 memmove (rel, rel + count, \ 2525 (relend - rel - count) * sizeof (*rel)); \ 2526 \ 2527 input_section->reloc_count -= count; \ 2528 relend -= count; \ 2529 rel--; \ 2530 continue; \ 2531 } \ 2532 } \ 2533 \ 2534 for (i_ = 0; i_ < count; i_++) \ 2535 { \ 2536 rel[i_].r_info = 0; \ 2537 rel[i_].r_addend = 0; \ 2538 } \ 2539 rel += count - 1; \ 2540 continue; \ 2541 } 2542 2543 /* Will a symbol be bound to the definition within the shared 2544 library, if any. A unique symbol can never be bound locally. */ 2545 #define SYMBOLIC_BIND(INFO, H) \ 2546 (!(H)->unique_global \ 2547 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))) 2548 2549 #endif /* _LIBELF_H_ */ 2550
Indexes created Thu Sep 10 00:26:39 UTC 2026