elf-bfd.h revision 1.1.1.1
1 /* BFD back-end data structures for ELF files. 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 3 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 #ifndef _LIBELF_H_ 25 #define _LIBELF_H_ 1 26 27 #include "elf/common.h" 28 #include "elf/external.h" 29 #include "elf/internal.h" 30 #include "bfdlink.h" 31 32 /* The number of entries in a section is its size divided by the size 33 of a single entry. This is normally only applicable to reloc and 34 symbol table sections. 35 PR 9934: It is possible to have relocations that do not refer to 36 symbols, thus it is also possible to have a relocation section in 37 an object file, but no symbol table. */ 38 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0) 39 40 /* If size isn't specified as 64 or 32, NAME macro should fail. */ 41 #ifndef NAME 42 #if ARCH_SIZE == 64 43 #define NAME(x, y) x ## 64 ## _ ## y 44 #endif 45 #if ARCH_SIZE == 32 46 #define NAME(x, y) x ## 32 ## _ ## y 47 #endif 48 #endif 49 50 #ifndef NAME 51 #define NAME(x, y) x ## NOSIZE ## _ ## y 52 #endif 53 54 #define ElfNAME(X) NAME(Elf,X) 55 #define elfNAME(X) NAME(elf,X) 56 57 /* Information held for an ELF symbol. The first field is the 58 corresponding asymbol. Every symbol is an ELF file is actually a 59 pointer to this structure, although it is often handled as a 60 pointer to an asymbol. */ 61 62 typedef struct 63 { 64 /* The BFD symbol. */ 65 asymbol symbol; 66 /* ELF symbol information. */ 67 Elf_Internal_Sym internal_elf_sym; 68 /* Backend specific information. */ 69 union 70 { 71 unsigned int hppa_arg_reloc; 72 void *mips_extr; 73 void *any; 74 } 75 tc_data; 76 77 /* Version information. This is from an Elf_Internal_Versym 78 structure in a SHT_GNU_versym section. It is zero if there is no 79 version information. */ 80 unsigned short version; 81 82 } elf_symbol_type; 83 84 struct elf_strtab_hash; 86 struct got_entry; 87 struct plt_entry; 88 89 union gotplt_union 90 { 91 bfd_signed_vma refcount; 92 bfd_vma offset; 93 struct got_entry *glist; 94 struct plt_entry *plist; 95 }; 96 97 struct elf_link_virtual_table_entry 98 { 99 /* Virtual table entry use information. This array is nominally of size 100 size/sizeof(target_void_pointer), though we have to be able to assume 101 and track a size while the symbol is still undefined. It is indexed 102 via offset/sizeof(target_void_pointer). */ 103 size_t size; 104 bfd_boolean *used; 105 106 /* Virtual table derivation info. */ 107 struct elf_link_hash_entry *parent; 108 }; 109 110 /* ELF linker hash table entries. */ 111 112 struct elf_link_hash_entry 113 { 114 struct bfd_link_hash_entry root; 115 116 /* Symbol index in output file. This is initialized to -1. It is 117 set to -2 if the symbol is used by a reloc. */ 118 long indx; 119 120 /* Symbol index as a dynamic symbol. Initialized to -1, and remains 121 -1 if this is not a dynamic symbol. */ 122 /* ??? Note that this is consistently used as a synonym for tests 123 against whether we can perform various simplifying transformations 124 to the code. (E.g. changing a pc-relative jump to a PLT entry 125 into a pc-relative jump to the target function.) That test, which 126 is often relatively complex, and someplaces wrong or incomplete, 127 should really be replaced by a predicate in elflink.c. 128 129 End result: this field -1 does not indicate that the symbol is 130 not in the dynamic symbol table, but rather that the symbol is 131 not visible outside this DSO. */ 132 long dynindx; 133 134 /* If this symbol requires an entry in the global offset table, the 135 processor specific backend uses this field to track usage and 136 final offset. Two schemes are supported: The first assumes that 137 a symbol may only have one GOT entry, and uses REFCOUNT until 138 size_dynamic_sections, at which point the contents of the .got is 139 fixed. Afterward, if OFFSET is -1, then the symbol does not 140 require a global offset table entry. The second scheme allows 141 multiple GOT entries per symbol, managed via a linked list 142 pointed to by GLIST. */ 143 union gotplt_union got; 144 145 /* Same, but tracks a procedure linkage table entry. */ 146 union gotplt_union plt; 147 148 /* Symbol size. */ 149 bfd_size_type size; 150 151 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */ 152 unsigned int type : 8; 153 154 /* Symbol st_other value, symbol visibility. */ 155 unsigned int other : 8; 156 157 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */ 158 unsigned int target_internal : 8; 159 160 /* Symbol is referenced by a non-shared object (other than the object 161 in which it is defined). */ 162 unsigned int ref_regular : 1; 163 /* Symbol is defined by a non-shared object. */ 164 unsigned int def_regular : 1; 165 /* Symbol is referenced by a shared object. */ 166 unsigned int ref_dynamic : 1; 167 /* Symbol is defined by a shared object. */ 168 unsigned int def_dynamic : 1; 169 /* Symbol has a non-weak reference from a non-shared object (other than 170 the object in which it is defined). */ 171 unsigned int ref_regular_nonweak : 1; 172 /* Dynamic symbol has been adjustd. */ 173 unsigned int dynamic_adjusted : 1; 174 /* Symbol needs a copy reloc. */ 175 unsigned int needs_copy : 1; 176 /* Symbol needs a procedure linkage table entry. */ 177 unsigned int needs_plt : 1; 178 /* Symbol appears in a non-ELF input file. */ 179 unsigned int non_elf : 1; 180 /* Symbol should be marked as hidden in the version information. */ 181 unsigned int hidden : 1; 182 /* Symbol was forced to local scope due to a version script file. */ 183 unsigned int forced_local : 1; 184 /* Symbol was forced to be dynamic due to a version script file. */ 185 unsigned int dynamic : 1; 186 /* Symbol was marked during garbage collection. */ 187 unsigned int mark : 1; 188 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is 189 not currently set by all the backends. */ 190 unsigned int non_got_ref : 1; 191 /* Symbol has a definition in a shared object. 192 FIXME: There is no real need for this field if def_dynamic is never 193 cleared and all places that test def_dynamic also test def_regular. */ 194 unsigned int dynamic_def : 1; 195 /* Symbol is weak in all shared objects. */ 196 unsigned int dynamic_weak : 1; 197 /* Symbol is referenced with a relocation where C/C++ pointer equality 198 matters. */ 199 unsigned int pointer_equality_needed : 1; 200 /* Symbol is a unique global symbol. */ 201 unsigned int unique_global : 1; 202 203 /* String table index in .dynstr if this is a dynamic symbol. */ 204 unsigned long dynstr_index; 205 206 union 207 { 208 /* If this is a weak defined symbol from a dynamic object, this 209 field points to a defined symbol with the same value, if there is 210 one. Otherwise it is NULL. */ 211 struct elf_link_hash_entry *weakdef; 212 213 /* Hash value of the name computed using the ELF hash function. 214 Used part way through size_dynamic_sections, after we've finished 215 with weakdefs. */ 216 unsigned long elf_hash_value; 217 } u; 218 219 /* Version information. */ 220 union 221 { 222 /* This field is used for a symbol which is not defined in a 223 regular object. It points to the version information read in 224 from the dynamic object. */ 225 Elf_Internal_Verdef *verdef; 226 /* This field is used for a symbol which is defined in a regular 227 object. It is set up in size_dynamic_sections. It points to 228 the version information we should write out for this symbol. */ 229 struct bfd_elf_version_tree *vertree; 230 } verinfo; 231 232 struct elf_link_virtual_table_entry *vtable; 233 }; 234 235 /* Will references to this symbol always reference the symbol 236 in this object? STV_PROTECTED is excluded from the visibility test 237 here so that function pointer comparisons work properly. Since 238 function symbols not defined in an app are set to their .plt entry, 239 it's necessary for shared libs to also reference the .plt even 240 though the symbol is really local to the shared lib. */ 241 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \ 242 _bfd_elf_symbol_refs_local_p (H, INFO, 0) 243 244 /* Will _calls_ to this symbol always call the version in this object? */ 245 #define SYMBOL_CALLS_LOCAL(INFO, H) \ 246 _bfd_elf_symbol_refs_local_p (H, INFO, 1) 247 248 /* Common symbols that are turned into definitions don't have the 249 DEF_REGULAR flag set, so they might appear to be undefined. */ 250 #define ELF_COMMON_DEF_P(H) \ 251 (!(H)->def_regular \ 252 && !(H)->def_dynamic \ 253 && (H)->root.type == bfd_link_hash_defined) 254 255 /* Records local symbols to be emitted in the dynamic symbol table. */ 256 257 struct elf_link_local_dynamic_entry 258 { 259 struct elf_link_local_dynamic_entry *next; 260 261 /* The input bfd this symbol came from. */ 262 bfd *input_bfd; 263 264 /* The index of the local symbol being copied. */ 265 long input_indx; 266 267 /* The index in the outgoing dynamic symbol table. */ 268 long dynindx; 269 270 /* A copy of the input symbol. */ 271 Elf_Internal_Sym isym; 272 }; 273 274 struct elf_link_loaded_list 275 { 276 struct elf_link_loaded_list *next; 277 bfd *abfd; 278 }; 279 280 /* Structures used by the eh_frame optimization code. */ 281 struct eh_cie_fde 282 { 283 union { 284 struct { 285 /* If REMOVED == 1, this is the CIE that the FDE originally used. 286 The CIE belongs to the same .eh_frame input section as the FDE. 287 288 If REMOVED == 0, this is the CIE that we have chosen to use for 289 the output FDE. The CIE's REMOVED field is also 0, but the CIE 290 might belong to a different .eh_frame input section from the FDE. */ 291 struct eh_cie_fde *cie_inf; 292 struct eh_cie_fde *next_for_section; 293 } fde; 294 struct { 295 /* CIEs have three states: 296 297 - REMOVED && !MERGED: Slated for removal because we haven't yet 298 proven that an FDE needs it. FULL_CIE, if nonnull, points to 299 more detailed information about the CIE. 300 301 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH, 302 which may not belong to the same input section. 303 304 - !REMOVED: We have decided to keep this CIE. SEC is the 305 .eh_frame input section that contains the CIE. */ 306 union { 307 struct cie *full_cie; 308 struct eh_cie_fde *merged_with; 309 asection *sec; 310 } u; 311 312 /* The offset of the personality data from the start of the CIE, 313 or 0 if the CIE doesn't have any. */ 314 unsigned int personality_offset : 8; 315 316 /* True if we have marked relocations associated with this CIE. */ 317 unsigned int gc_mark : 1; 318 319 /* True if we have decided to turn an absolute LSDA encoding into 320 a PC-relative one. */ 321 unsigned int make_lsda_relative : 1; 322 323 /* True if we have decided to turn an absolute personality 324 encoding into a PC-relative one. */ 325 unsigned int make_per_encoding_relative : 1; 326 327 /* True if the CIE contains personality data and if that 328 data uses a PC-relative encoding. Always true when 329 make_per_encoding_relative is. */ 330 unsigned int per_encoding_relative : 1; 331 332 /* True if we need to add an 'R' (FDE encoding) entry to the 333 CIE's augmentation data. */ 334 unsigned int add_fde_encoding : 1; 335 336 /* True if we have merged this CIE with another. */ 337 unsigned int merged : 1; 338 339 /* Unused bits. */ 340 unsigned int pad1 : 18; 341 } cie; 342 } u; 343 unsigned int reloc_index; 344 unsigned int size; 345 unsigned int offset; 346 unsigned int new_offset; 347 unsigned int fde_encoding : 8; 348 unsigned int lsda_encoding : 8; 349 unsigned int lsda_offset : 8; 350 351 /* True if this entry represents a CIE, false if it represents an FDE. */ 352 unsigned int cie : 1; 353 354 /* True if this entry is currently marked for removal. */ 355 unsigned int removed : 1; 356 357 /* True if we need to add a 'z' (augmentation size) entry to the CIE's 358 augmentation data, and an associated byte to each of the CIE's FDEs. */ 359 unsigned int add_augmentation_size : 1; 360 361 /* True if we have decided to convert absolute FDE relocations into 362 relative ones. This applies to the first relocation in the FDE, 363 which is against the code that the FDE describes. */ 364 unsigned int make_relative : 1; 365 366 /* Unused bits. */ 367 unsigned int pad1 : 4; 368 369 unsigned int *set_loc; 370 }; 371 372 struct eh_frame_sec_info 373 { 374 unsigned int count; 375 struct cie *cies; 376 struct eh_cie_fde entry[1]; 377 }; 378 379 struct eh_frame_array_ent 380 { 381 bfd_vma initial_loc; 382 bfd_vma fde; 383 }; 384 385 struct htab; 386 387 struct eh_frame_hdr_info 388 { 389 struct htab *cies; 390 asection *hdr_sec; 391 unsigned int fde_count, array_count; 392 struct eh_frame_array_ent *array; 393 /* TRUE if we should try to merge CIEs between input sections. */ 394 bfd_boolean merge_cies; 395 /* TRUE if all .eh_frames have been parsd. */ 396 bfd_boolean parsed_eh_frames; 397 /* TRUE if .eh_frame_hdr should contain the sorted search table. 398 We build it if we successfully read all .eh_frame input sections 399 and recognize them. */ 400 bfd_boolean table; 401 }; 402 403 /* Enum used to identify target specific extensions to the elf_obj_tdata 404 and elf_link_hash_table structures. Note the enums deliberately start 405 from 1 so that we can detect an uninitialized field. The generic value 406 is last so that additions to this enum do not need to modify more than 407 one line. */ 408 enum elf_target_id 409 { 410 ALPHA_ELF_DATA = 1, 411 ARM_ELF_DATA, 412 AVR_ELF_DATA, 413 BFIN_ELF_DATA, 414 CRIS_ELF_DATA, 415 FRV_ELF_DATA, 416 HPPA32_ELF_DATA, 417 HPPA64_ELF_DATA, 418 I386_ELF_DATA, 419 IA64_ELF_DATA, 420 LM32_ELF_DATA, 421 M32R_ELF_DATA, 422 M68HC11_ELF_DATA, 423 M68K_ELF_DATA, 424 MICROBLAZE_ELF_DATA, 425 MIPS_ELF_DATA, 426 MN10300_ELF_DATA, 427 PPC32_ELF_DATA, 428 PPC64_ELF_DATA, 429 S390_ELF_DATA, 430 SH_ELF_DATA, 431 SPARC_ELF_DATA, 432 SPU_ELF_DATA, 433 TIC6X_ELF_DATA, 434 X86_64_ELF_DATA, 435 XTENSA_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 /* A pointer to information used to merge SEC_MERGE sections. */ 503 void *merge_info; 504 505 /* Used to link stabs in sections. */ 506 struct stab_info stab_info; 507 508 /* Used by eh_frame code when editing .eh_frame. */ 509 struct eh_frame_hdr_info eh_info; 510 511 /* A linked list of local symbols to be added to .dynsym. */ 512 struct elf_link_local_dynamic_entry *dynlocal; 513 514 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic 515 objects included in the link. */ 516 struct bfd_link_needed_list *runpath; 517 518 /* Cached first output tls section and size of PT_TLS segment. */ 519 asection *tls_sec; 520 bfd_size_type tls_size; 521 522 /* A linked list of BFD's loaded in the link. */ 523 struct elf_link_loaded_list *loaded; 524 525 /* Short-cuts to get to dynamic linker sections. */ 526 asection *sgot; 527 asection *sgotplt; 528 asection *srelgot; 529 asection *splt; 530 asection *srelplt; 531 asection *igotplt; 532 asection *iplt; 533 asection *irelplt; 534 asection *irelifunc; 535 }; 536 537 /* Look up an entry in an ELF linker hash table. */ 538 539 #define elf_link_hash_lookup(table, string, create, copy, follow) \ 540 ((struct elf_link_hash_entry *) \ 541 bfd_link_hash_lookup (&(table)->root, (string), (create), \ 542 (copy), (follow))) 543 544 /* Traverse an ELF linker hash table. */ 545 546 #define elf_link_hash_traverse(table, func, info) \ 547 (bfd_link_hash_traverse \ 548 (&(table)->root, \ 549 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 550 (info))) 551 552 /* Get the ELF linker hash table from a link_info structure. */ 553 554 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) 555 556 #define elf_hash_table_id(table) ((table) -> hash_table_id) 557 558 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */ 559 #define is_elf_hash_table(htab) \ 560 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) 561 562 /* Used by bfd_sym_from_r_symndx to cache a small number of local 563 symbols. */ 564 #define LOCAL_SYM_CACHE_SIZE 32 565 struct sym_cache 566 { 567 bfd *abfd; 568 unsigned long indx[LOCAL_SYM_CACHE_SIZE]; 569 Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE]; 570 }; 571 572 /* Constant information held for an ELF backend. */ 574 575 struct elf_size_info { 576 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; 577 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; 578 579 /* The size of entries in the .hash section. */ 580 unsigned char sizeof_hash_entry; 581 582 /* The number of internal relocations to allocate per external 583 relocation entry. */ 584 unsigned char int_rels_per_ext_rel; 585 /* We use some fixed size arrays. This should be large enough to 586 handle all back-ends. */ 587 #define MAX_INT_RELS_PER_EXT_REL 3 588 589 unsigned char arch_size, log_file_align; 590 unsigned char elfclass, ev_current; 591 int (*write_out_phdrs) 592 (bfd *, const Elf_Internal_Phdr *, unsigned int); 593 bfd_boolean 594 (*write_shdrs_and_ehdr) (bfd *); 595 bfd_boolean (*checksum_contents) 596 (bfd * , void (*) (const void *, size_t, void *), void *); 597 void (*write_relocs) 598 (bfd *, asection *, void *); 599 bfd_boolean (*swap_symbol_in) 600 (bfd *, const void *, const void *, Elf_Internal_Sym *); 601 void (*swap_symbol_out) 602 (bfd *, const Elf_Internal_Sym *, void *, void *); 603 bfd_boolean (*slurp_reloc_table) 604 (bfd *, asection *, asymbol **, bfd_boolean); 605 long (*slurp_symbol_table) 606 (bfd *, asymbol **, bfd_boolean); 607 void (*swap_dyn_in) 608 (bfd *, const void *, Elf_Internal_Dyn *); 609 void (*swap_dyn_out) 610 (bfd *, const Elf_Internal_Dyn *, void *); 611 612 /* This function is called to swap in a REL relocation. If an 613 external relocation corresponds to more than one internal 614 relocation, then all relocations are swapped in at once. */ 615 void (*swap_reloc_in) 616 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 617 618 /* This function is called to swap out a REL relocation. */ 619 void (*swap_reloc_out) 620 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 621 622 /* This function is called to swap in a RELA relocation. If an 623 external relocation corresponds to more than one internal 624 relocation, then all relocations are swapped in at once. */ 625 void (*swap_reloca_in) 626 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 627 628 /* This function is called to swap out a RELA relocation. */ 629 void (*swap_reloca_out) 630 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 631 }; 632 633 #define elf_symbol_from(ABFD,S) \ 634 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ 635 && (S)->the_bfd->tdata.elf_obj_data != 0) \ 636 ? (elf_symbol_type *) (S) \ 637 : 0) 638 639 enum elf_reloc_type_class { 640 reloc_class_normal, 641 reloc_class_relative, 642 reloc_class_plt, 643 reloc_class_copy 644 }; 645 646 struct elf_reloc_cookie 647 { 648 Elf_Internal_Rela *rels, *rel, *relend; 649 Elf_Internal_Sym *locsyms; 650 bfd *abfd; 651 size_t locsymcount; 652 size_t extsymoff; 653 struct elf_link_hash_entry **sym_hashes; 654 int r_sym_shift; 655 bfd_boolean bad_symtab; 656 }; 657 658 /* The level of IRIX compatibility we're striving for. */ 659 660 typedef enum { 661 ict_none, 662 ict_irix5, 663 ict_irix6 664 } irix_compat_t; 665 666 /* Mapping of ELF section names and types. */ 667 struct bfd_elf_special_section 668 { 669 const char *prefix; 670 int prefix_length; 671 /* 0 means name must match PREFIX exactly. 672 -1 means name must start with PREFIX followed by an arbitrary string. 673 -2 means name must match PREFIX exactly or consist of PREFIX followed 674 by a dot then anything. 675 > 0 means name must start with the first PREFIX_LENGTH chars of 676 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ 677 int suffix_length; 678 int type; 679 bfd_vma attr; 680 }; 681 682 enum action_discarded 683 { 684 COMPLAIN = 1, 685 PRETEND = 2 686 }; 687 688 typedef asection * (*elf_gc_mark_hook_fn) 689 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 690 struct elf_link_hash_entry *, Elf_Internal_Sym *); 691 692 struct elf_backend_data 693 { 694 /* The architecture for this backend. */ 695 enum bfd_architecture arch; 696 697 /* An identifier used to distinguish different target specific 698 extensions to elf_obj_tdata and elf_link_hash_table structures. */ 699 enum elf_target_id target_id; 700 701 /* The ELF machine code (EM_xxxx) for this backend. */ 702 int elf_machine_code; 703 704 /* EI_OSABI. */ 705 int elf_osabi; 706 707 /* The maximum page size for this backend. */ 708 bfd_vma maxpagesize; 709 710 /* The minimum page size for this backend. An input object will not be 711 considered page aligned unless its sections are correctly aligned for 712 pages at least this large. May be smaller than maxpagesize. */ 713 bfd_vma minpagesize; 714 715 /* The common page size for this backend. */ 716 bfd_vma commonpagesize; 717 718 /* The BFD flags applied to sections created for dynamic linking. */ 719 flagword dynamic_sec_flags; 720 721 /* A function to translate an ELF RELA relocation to a BFD arelent 722 structure. */ 723 void (*elf_info_to_howto) 724 (bfd *, arelent *, Elf_Internal_Rela *); 725 726 /* A function to translate an ELF REL relocation to a BFD arelent 727 structure. */ 728 void (*elf_info_to_howto_rel) 729 (bfd *, arelent *, Elf_Internal_Rela *); 730 731 /* A function to determine whether a symbol is global when 732 partitioning the symbol table into local and global symbols. 733 This should be NULL for most targets, in which case the correct 734 thing will be done. MIPS ELF, at least on the Irix 5, has 735 special requirements. */ 736 bfd_boolean (*elf_backend_sym_is_global) 737 (bfd *, asymbol *); 738 739 /* The remaining functions are hooks which are called only if they 740 are not NULL. */ 741 742 /* A function to permit a backend specific check on whether a 743 particular BFD format is relevant for an object file, and to 744 permit the backend to set any global information it wishes. When 745 this is called elf_elfheader is set, but anything else should be 746 used with caution. If this returns FALSE, the check_format 747 routine will return a bfd_error_wrong_format error. */ 748 bfd_boolean (*elf_backend_object_p) 749 (bfd *); 750 751 /* A function to do additional symbol processing when reading the 752 ELF symbol table. This is where any processor-specific special 753 section indices are handled. */ 754 void (*elf_backend_symbol_processing) 755 (bfd *, asymbol *); 756 757 /* A function to do additional symbol processing after reading the 758 entire ELF symbol table. */ 759 bfd_boolean (*elf_backend_symbol_table_processing) 760 (bfd *, elf_symbol_type *, unsigned int); 761 762 /* A function to set the type of the info field. Processor-specific 763 types should be handled here. */ 764 int (*elf_backend_get_symbol_type) 765 (Elf_Internal_Sym *, int); 766 767 /* A function to return the linker hash table entry of a symbol that 768 might be satisfied by an archive symbol. */ 769 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup) 770 (bfd *, struct bfd_link_info *, const char *); 771 772 /* Return true if local section symbols should have a non-null st_name. 773 NULL implies false. */ 774 bfd_boolean (*elf_backend_name_local_section_symbols) 775 (bfd *); 776 777 /* A function to do additional processing on the ELF section header 778 just before writing it out. This is used to set the flags and 779 type fields for some sections, or to actually write out data for 780 unusual sections. */ 781 bfd_boolean (*elf_backend_section_processing) 782 (bfd *, Elf_Internal_Shdr *); 783 784 /* A function to handle unusual section types when creating BFD 785 sections from ELF sections. */ 786 bfd_boolean (*elf_backend_section_from_shdr) 787 (bfd *, Elf_Internal_Shdr *, const char *, int); 788 789 /* A function to convert machine dependent ELF section header flags to 790 BFD internal section header flags. */ 791 bfd_boolean (*elf_backend_section_flags) 792 (flagword *, const Elf_Internal_Shdr *); 793 794 /* A function that returns a struct containing ELF section flags and 795 type for the given BFD section. */ 796 const struct bfd_elf_special_section * (*get_sec_type_attr) 797 (bfd *, asection *); 798 799 /* A function to handle unusual program segment types when creating BFD 800 sections from ELF program segments. */ 801 bfd_boolean (*elf_backend_section_from_phdr) 802 (bfd *, Elf_Internal_Phdr *, int, const char *); 803 804 /* A function to set up the ELF section header for a BFD section in 805 preparation for writing it out. This is where the flags and type 806 fields are set for unusual sections. */ 807 bfd_boolean (*elf_backend_fake_sections) 808 (bfd *, Elf_Internal_Shdr *, asection *); 809 810 /* A function to get the ELF section index for a BFD section. If 811 this returns TRUE, the section was found. If it is a normal ELF 812 section, *RETVAL should be left unchanged. If it is not a normal 813 ELF section *RETVAL should be set to the SHN_xxxx index. */ 814 bfd_boolean (*elf_backend_section_from_bfd_section) 815 (bfd *, asection *, int *retval); 816 817 /* If this field is not NULL, it is called by the add_symbols phase 818 of a link just before adding a symbol to the global linker hash 819 table. It may modify any of the fields as it wishes. If *NAME 820 is set to NULL, the symbol will be skipped rather than being 821 added to the hash table. This function is responsible for 822 handling all processor dependent symbol bindings and section 823 indices, and must set at least *FLAGS and *SEC for each processor 824 dependent case; failure to do so will cause a link error. */ 825 bfd_boolean (*elf_add_symbol_hook) 826 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *, 827 const char **name, flagword *flags, asection **sec, bfd_vma *value); 828 829 /* If this field is not NULL, it is called by the elf_link_output_sym 830 phase of a link for each symbol which will appear in the object file. 831 On error, this function returns 0. 1 is returned when the symbol 832 should be output, 2 is returned when the symbol should be discarded. */ 833 int (*elf_backend_link_output_symbol_hook) 834 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *, 835 asection *, struct elf_link_hash_entry *); 836 837 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend 838 linker the first time it encounters a dynamic object in the link. 839 This function must create any sections required for dynamic 840 linking. The ABFD argument is a dynamic object. The .interp, 841 .dynamic, .dynsym, .dynstr, and .hash functions have already been 842 created, and this function may modify the section flags if 843 desired. This function will normally create the .got and .plt 844 sections, but different backends have different requirements. */ 845 bfd_boolean (*elf_backend_create_dynamic_sections) 846 (bfd *abfd, struct bfd_link_info *info); 847 848 /* When creating a shared library, determine whether to omit the 849 dynamic symbol for the section. */ 850 bfd_boolean (*elf_backend_omit_section_dynsym) 851 (bfd *output_bfd, struct bfd_link_info *info, asection *osec); 852 853 /* Return TRUE if relocations of targets are compatible to the extent 854 that CHECK_RELOCS will properly process them. PR 4424. */ 855 bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *); 856 857 /* The CHECK_RELOCS function is called by the add_symbols phase of 858 the ELF backend linker. It is called once for each section with 859 relocs of an object file, just after the symbols for the object 860 file have been added to the global linker hash table. The 861 function must look through the relocs and do any special handling 862 required. This generally means allocating space in the global 863 offset table, and perhaps allocating space for a reloc. The 864 relocs are always passed as Rela structures; if the section 865 actually uses Rel structures, the r_addend field will always be 866 zero. */ 867 bfd_boolean (*check_relocs) 868 (bfd *abfd, struct bfd_link_info *info, asection *o, 869 const Elf_Internal_Rela *relocs); 870 871 /* The CHECK_DIRECTIVES function is called once per input file by 872 the add_symbols phase of the ELF backend linker. The function 873 must inspect the bfd and create any additional symbols according 874 to any custom directives in the bfd. */ 875 bfd_boolean (*check_directives) 876 (bfd *abfd, struct bfd_link_info *info); 877 878 /* The AS_NEEDED_CLEANUP function is called once per --as-needed 879 input file that was not needed by the add_symbols phase of the 880 ELF backend linker. The function must undo any target specific 881 changes in the symbol hash table. */ 882 bfd_boolean (*as_needed_cleanup) 883 (bfd *abfd, struct bfd_link_info *info); 884 885 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend 886 linker for every symbol which is defined by a dynamic object and 887 referenced by a regular object. This is called after all the 888 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS 889 function has been called. The hash table entry should be 890 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be 891 defined in a section from a dynamic object. Dynamic object 892 sections are not included in the final link, and this function is 893 responsible for changing the value to something which the rest of 894 the link can deal with. This will normally involve adding an 895 entry to the .plt or .got or some such section, and setting the 896 symbol to point to that. */ 897 bfd_boolean (*elf_backend_adjust_dynamic_symbol) 898 (struct bfd_link_info *info, struct elf_link_hash_entry *h); 899 900 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker 901 after all the linker input files have been seen but before the 902 section sizes have been set. This is called after 903 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */ 904 bfd_boolean (*elf_backend_always_size_sections) 905 (bfd *output_bfd, struct bfd_link_info *info); 906 907 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend 908 linker after all the linker input files have been seen but before 909 the sections sizes have been set. This is called after 910 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols. 911 It is only called when linking against a dynamic object. It must 912 set the sizes of the dynamic sections, and may fill in their 913 contents as well. The generic ELF linker can handle the .dynsym, 914 .dynstr and .hash sections. This function must handle the 915 .interp section and any sections created by the 916 CREATE_DYNAMIC_SECTIONS entry point. */ 917 bfd_boolean (*elf_backend_size_dynamic_sections) 918 (bfd *output_bfd, struct bfd_link_info *info); 919 920 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections 921 we keep to use as a base for relocs and symbols. */ 922 void (*elf_backend_init_index_section) 923 (bfd *output_bfd, struct bfd_link_info *info); 924 925 /* The RELOCATE_SECTION function is called by the ELF backend linker 926 to handle the relocations for a section. 927 928 The relocs are always passed as Rela structures; if the section 929 actually uses Rel structures, the r_addend field will always be 930 zero. 931 932 This function is responsible for adjust the section contents as 933 necessary, and (if using Rela relocs and generating a 934 relocatable output file) adjusting the reloc addend as 935 necessary. 936 937 This function does not have to worry about setting the reloc 938 address or the reloc symbol index. 939 940 LOCAL_SYMS is a pointer to the swapped in local symbols. 941 942 LOCAL_SECTIONS is an array giving the section in the input file 943 corresponding to the st_shndx field of each local symbol. 944 945 The global hash table entry for the global symbols can be found 946 via elf_sym_hashes (input_bfd). 947 948 When generating relocatable output, this function must handle 949 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 950 going to be the section symbol corresponding to the output 951 section, which means that the addend must be adjusted 952 accordingly. 953 954 Returns FALSE on error, TRUE on success, 2 if successful and 955 relocations should be written for this section. */ 956 int (*elf_backend_relocate_section) 957 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd, 958 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs, 959 Elf_Internal_Sym *local_syms, asection **local_sections); 960 961 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend 962 linker just before it writes a symbol out to the .dynsym section. 963 The processor backend may make any required adjustment to the 964 symbol. It may also take the opportunity to set contents of the 965 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on 966 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called 967 on those symbols which are defined by a dynamic object. */ 968 bfd_boolean (*elf_backend_finish_dynamic_symbol) 969 (bfd *output_bfd, struct bfd_link_info *info, 970 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym); 971 972 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend 973 linker just before it writes all the dynamic sections out to the 974 output file. The FINISH_DYNAMIC_SYMBOL will have been called on 975 all dynamic symbols. */ 976 bfd_boolean (*elf_backend_finish_dynamic_sections) 977 (bfd *output_bfd, struct bfd_link_info *info); 978 979 /* A function to do any beginning processing needed for the ELF file 980 before building the ELF headers and computing file positions. */ 981 void (*elf_backend_begin_write_processing) 982 (bfd *, struct bfd_link_info *); 983 984 /* A function to do any final processing needed for the ELF file 985 before writing it out. The LINKER argument is TRUE if this BFD 986 was created by the ELF backend linker. */ 987 void (*elf_backend_final_write_processing) 988 (bfd *, bfd_boolean linker); 989 990 /* This function is called by get_program_header_size. It should 991 return the number of additional program segments which this BFD 992 will need. It should return -1 on error. */ 993 int (*elf_backend_additional_program_headers) 994 (bfd *, struct bfd_link_info *); 995 996 /* This function is called to modify an existing segment map in a 997 backend specific fashion. */ 998 bfd_boolean (*elf_backend_modify_segment_map) 999 (bfd *, struct bfd_link_info *); 1000 1001 /* This function is called to modify program headers just before 1002 they are written. */ 1003 bfd_boolean (*elf_backend_modify_program_headers) 1004 (bfd *, struct bfd_link_info *); 1005 1006 /* This function is called before section garbage collection to 1007 mark entry symbol sections. */ 1008 void (*gc_keep) 1009 (struct bfd_link_info *); 1010 1011 /* This function is called during section garbage collection to 1012 mark sections that define global symbols. */ 1013 bfd_boolean (*gc_mark_dynamic_ref) 1014 (struct elf_link_hash_entry *, void *); 1015 1016 /* This function is called during section gc to discover the section a 1017 particular relocation refers to. */ 1018 elf_gc_mark_hook_fn gc_mark_hook; 1019 1020 /* This function, if defined, is called after the first gc marking pass 1021 to allow the backend to mark additional sections. */ 1022 bfd_boolean (*gc_mark_extra_sections) 1023 (struct bfd_link_info *, elf_gc_mark_hook_fn); 1024 1025 /* This function, if defined, is called during the sweep phase of gc 1026 in order that a backend might update any data structures it might 1027 be maintaining. */ 1028 bfd_boolean (*gc_sweep_hook) 1029 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 1030 1031 /* This function, if defined, is called after the ELF headers have 1032 been created. This allows for things like the OS and ABI versions 1033 to be changed. */ 1034 void (*elf_backend_post_process_headers) 1035 (bfd *, struct bfd_link_info *); 1036 1037 /* This function, if defined, prints a symbol to file and returns the 1038 name of the symbol to be printed. It should return NULL to fall 1039 back to default symbol printing. */ 1040 const char *(*elf_backend_print_symbol_all) 1041 (bfd *, void *, asymbol *); 1042 1043 /* This function, if defined, is called after all local symbols and 1044 global symbols converted to locals are emitted into the symtab 1045 section. It allows the backend to emit special local symbols 1046 not handled in the hash table. */ 1047 bfd_boolean (*elf_backend_output_arch_local_syms) 1048 (bfd *, struct bfd_link_info *, void *, 1049 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 1050 struct elf_link_hash_entry *)); 1051 1052 /* This function, if defined, is called after all symbols are emitted 1053 into the symtab section. It allows the backend to emit special 1054 global symbols not handled in the hash table. */ 1055 bfd_boolean (*elf_backend_output_arch_syms) 1056 (bfd *, struct bfd_link_info *, void *, 1057 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 1058 struct elf_link_hash_entry *)); 1059 1060 /* Copy any information related to dynamic linking from a pre-existing 1061 symbol to a newly created symbol. Also called to copy flags and 1062 other back-end info to a weakdef, in which case the symbol is not 1063 newly created and plt/got refcounts and dynamic indices should not 1064 be copied. */ 1065 void (*elf_backend_copy_indirect_symbol) 1066 (struct bfd_link_info *, struct elf_link_hash_entry *, 1067 struct elf_link_hash_entry *); 1068 1069 /* Modify any information related to dynamic linking such that the 1070 symbol is not exported. */ 1071 void (*elf_backend_hide_symbol) 1072 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1073 1074 /* A function to do additional symbol fixup, called by 1075 _bfd_elf_fix_symbol_flags. */ 1076 bfd_boolean (*elf_backend_fixup_symbol) 1077 (struct bfd_link_info *, struct elf_link_hash_entry *); 1078 1079 /* Merge the backend specific symbol attribute. */ 1080 void (*elf_backend_merge_symbol_attribute) 1081 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, 1082 bfd_boolean); 1083 1084 /* This function, if defined, will return a string containing the 1085 name of a target-specific dynamic tag. */ 1086 char *(*elf_backend_get_target_dtag) 1087 (bfd_vma); 1088 1089 /* Decide whether an undefined symbol is special and can be ignored. 1090 This is the case for OPTIONAL symbols on IRIX. */ 1091 bfd_boolean (*elf_backend_ignore_undef_symbol) 1092 (struct elf_link_hash_entry *); 1093 1094 /* Emit relocations. Overrides default routine for emitting relocs, 1095 except during a relocatable link, or if all relocs are being emitted. */ 1096 bfd_boolean (*elf_backend_emit_relocs) 1097 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1098 struct elf_link_hash_entry **); 1099 1100 /* Count relocations. Not called for relocatable links 1101 or if all relocs are being preserved in the output. */ 1102 unsigned int (*elf_backend_count_relocs) 1103 (struct bfd_link_info *, asection *); 1104 1105 /* This function, if defined, is called when an NT_PRSTATUS note is found 1106 in a core file. */ 1107 bfd_boolean (*elf_backend_grok_prstatus) 1108 (bfd *, Elf_Internal_Note *); 1109 1110 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO 1111 note is found in a core file. */ 1112 bfd_boolean (*elf_backend_grok_psinfo) 1113 (bfd *, Elf_Internal_Note *); 1114 1115 /* This function, if defined, is called to write a note to a corefile. */ 1116 char *(*elf_backend_write_core_note) 1117 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...); 1118 1119 /* This function returns class of a reloc type. */ 1120 enum elf_reloc_type_class (*elf_backend_reloc_type_class) 1121 (const Elf_Internal_Rela *); 1122 1123 /* This function, if defined, removes information about discarded functions 1124 from other sections which mention them. */ 1125 bfd_boolean (*elf_backend_discard_info) 1126 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 1127 1128 /* This function, if defined, signals that the function above has removed 1129 the discarded relocations for this section. */ 1130 bfd_boolean (*elf_backend_ignore_discarded_relocs) 1131 (asection *); 1132 1133 /* What to do when ld finds relocations against symbols defined in 1134 discarded sections. */ 1135 unsigned int (*action_discarded) 1136 (asection *); 1137 1138 /* This function returns the width of FDE pointers in bytes, or 0 if 1139 that can't be determined for some reason. The default definition 1140 goes by the bfd's EI_CLASS. */ 1141 unsigned int (*elf_backend_eh_frame_address_size) 1142 (bfd *, asection *); 1143 1144 /* These functions tell elf-eh-frame whether to attempt to turn 1145 absolute or lsda encodings into pc-relative ones. The default 1146 definition enables these transformations. */ 1147 bfd_boolean (*elf_backend_can_make_relative_eh_frame) 1148 (bfd *, struct bfd_link_info *, asection *); 1149 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) 1150 (bfd *, struct bfd_link_info *, asection *); 1151 1152 /* This function returns an encoding after computing the encoded 1153 value (and storing it in ENCODED) for the given OFFSET into OSEC, 1154 to be stored in at LOC_OFFSET into the LOC_SEC input section. 1155 The default definition chooses a 32-bit PC-relative encoding. */ 1156 bfd_byte (*elf_backend_encode_eh_address) 1157 (bfd *abfd, struct bfd_link_info *info, 1158 asection *osec, bfd_vma offset, 1159 asection *loc_sec, bfd_vma loc_offset, 1160 bfd_vma *encoded); 1161 1162 /* This function, if defined, may write out the given section. 1163 Returns TRUE if it did so and FALSE if the caller should. */ 1164 bfd_boolean (*elf_backend_write_section) 1165 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1166 1167 /* The level of IRIX compatibility we're striving for. 1168 MIPS ELF specific function. */ 1169 irix_compat_t (*elf_backend_mips_irix_compat) 1170 (bfd *); 1171 1172 reloc_howto_type *(*elf_backend_mips_rtype_to_howto) 1173 (unsigned int, bfd_boolean); 1174 1175 /* The swapping table to use when dealing with ECOFF information. 1176 Used for the MIPS ELF .mdebug section. */ 1177 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; 1178 1179 /* This function implements `bfd_elf_bfd_from_remote_memory'; 1180 see elf.c, elfcode.h. */ 1181 bfd *(*elf_backend_bfd_from_remote_memory) 1182 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1183 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len)); 1184 1185 /* This function is used by `_bfd_elf_get_synthetic_symtab'; 1186 see elf.c. */ 1187 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); 1188 1189 /* Is symbol defined in common section? */ 1190 bfd_boolean (*common_definition) (Elf_Internal_Sym *); 1191 1192 /* Return a common section index for section. */ 1193 unsigned int (*common_section_index) (asection *); 1194 1195 /* Return a common section for section. */ 1196 asection *(*common_section) (asection *); 1197 1198 /* Return TRUE if we can merge 2 definitions. */ 1199 bfd_boolean (*merge_symbol) (struct bfd_link_info *, 1200 struct elf_link_hash_entry **, 1201 struct elf_link_hash_entry *, 1202 Elf_Internal_Sym *, asection **, 1203 bfd_vma *, unsigned int *, 1204 bfd_boolean *, bfd_boolean *, 1205 bfd_boolean *, bfd_boolean *, 1206 bfd_boolean *, bfd_boolean *, 1207 bfd_boolean *, bfd_boolean *, 1208 bfd *, asection **, 1209 bfd_boolean *, bfd_boolean *, 1210 bfd_boolean *, bfd_boolean *, 1211 bfd *, asection **); 1212 1213 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 1214 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *); 1215 1216 /* Return TRUE if type is a function symbol type. */ 1217 bfd_boolean (*is_function_type) (unsigned int type); 1218 1219 /* Used to handle bad SHF_LINK_ORDER input. */ 1220 bfd_error_handler_type link_order_error_handler; 1221 1222 /* Name of the PLT relocation section. */ 1223 const char *relplt_name; 1224 1225 /* Alternate EM_xxxx machine codes for this backend. */ 1226 int elf_machine_alt1; 1227 int elf_machine_alt2; 1228 1229 const struct elf_size_info *s; 1230 1231 /* An array of target specific special sections. */ 1232 const struct bfd_elf_special_section *special_sections; 1233 1234 /* The size in bytes of the header for the GOT. This includes the 1235 so-called reserved entries on some systems. */ 1236 bfd_vma got_header_size; 1237 1238 /* The size of the GOT entry for the symbol pointed to by H if non-NULL, 1239 otherwise by the local symbol with index SYMNDX in IBFD. */ 1240 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *, 1241 struct elf_link_hash_entry *h, 1242 bfd *ibfd, unsigned long symndx); 1243 1244 /* The vendor name to use for a processor-standard attributes section. */ 1245 const char *obj_attrs_vendor; 1246 1247 /* The section name to use for a processor-standard attributes section. */ 1248 const char *obj_attrs_section; 1249 1250 /* Return 1, 2 or 3 to indicate what type of arguments a 1251 processor-specific tag takes. */ 1252 int (*obj_attrs_arg_type) (int); 1253 1254 /* The section type to use for an attributes section. */ 1255 unsigned int obj_attrs_section_type; 1256 1257 /* This function determines the order in which any attributes are 1258 written. It must be defined for input in the range 1259 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range 1260 is used in order to make unity easy). The returned value is the 1261 actual tag number to place in the input position. */ 1262 int (*obj_attrs_order) (int); 1263 1264 /* Handle merging unknown attributes; either warn and return TRUE, 1265 or give an error and return FALSE. */ 1266 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int); 1267 1268 /* This is non-zero if static TLS segments require a special alignment. */ 1269 unsigned static_tls_alignment; 1270 1271 /* This is TRUE if the linker should act like collect and gather 1272 global constructors and destructors by name. This is TRUE for 1273 MIPS ELF because the Irix 5 tools can not handle the .init 1274 section. */ 1275 unsigned collect : 1; 1276 1277 /* This is TRUE if the linker should ignore changes to the type of a 1278 symbol. This is TRUE for MIPS ELF because some Irix 5 objects 1279 record undefined functions as STT_OBJECT although the definitions 1280 are STT_FUNC. */ 1281 unsigned type_change_ok : 1; 1282 1283 /* Whether the backend may use REL relocations. (Some backends use 1284 both REL and RELA relocations, and this flag is set for those 1285 backends.) */ 1286 unsigned may_use_rel_p : 1; 1287 1288 /* Whether the backend may use RELA relocations. (Some backends use 1289 both REL and RELA relocations, and this flag is set for those 1290 backends.) */ 1291 unsigned may_use_rela_p : 1; 1292 1293 /* Whether the default relocation type is RELA. If a backend with 1294 this flag set wants REL relocations for a particular section, 1295 it must note that explicitly. Similarly, if this flag is clear, 1296 and the backend wants RELA relocations for a particular 1297 section. */ 1298 unsigned default_use_rela_p : 1; 1299 1300 /* True if PLT and copy relocations should be RELA by default. */ 1301 unsigned rela_plts_and_copies_p : 1; 1302 1303 /* Set if RELA relocations for a relocatable link can be handled by 1304 generic code. Backends that set this flag need do nothing in the 1305 backend relocate_section routine for relocatable linking. */ 1306 unsigned rela_normal : 1; 1307 1308 /* TRUE if addresses "naturally" sign extend. This is used when 1309 swapping in from Elf32 when BFD64. */ 1310 unsigned sign_extend_vma : 1; 1311 1312 unsigned want_got_plt : 1; 1313 unsigned plt_readonly : 1; 1314 unsigned want_plt_sym : 1; 1315 unsigned plt_not_loaded : 1; 1316 unsigned plt_alignment : 4; 1317 unsigned can_gc_sections : 1; 1318 unsigned can_refcount : 1; 1319 unsigned want_got_sym : 1; 1320 unsigned want_dynbss : 1; 1321 1322 /* Targets which do not support physical addressing often require 1323 that the p_paddr field in the section header to be set to zero. 1324 This field indicates whether this behavior is required. */ 1325 unsigned want_p_paddr_set_to_zero : 1; 1326 1327 /* True if an object file lacking a .note.GNU-stack section 1328 should be assumed to be requesting exec stack. At least one 1329 other file in the link needs to have a .note.GNU-stack section 1330 for a PT_GNU_STACK segment to be created. */ 1331 unsigned default_execstack : 1; 1332 }; 1333 1334 /* Information about reloc sections associated with a bfd_elf_section_data 1335 structure. */ 1336 struct bfd_elf_section_reloc_data 1337 { 1338 /* The ELF header for the reloc section associated with this 1339 section, if any. */ 1340 Elf_Internal_Shdr *hdr; 1341 /* The number of relocations currently assigned to HDR. */ 1342 unsigned int count; 1343 /* The ELF section number of the reloc section. Only used for an 1344 output file. */ 1345 int idx; 1346 /* Used by the backend linker to store the symbol hash table entries 1347 associated with relocs against global symbols. */ 1348 struct elf_link_hash_entry **hashes; 1349 }; 1350 1351 /* Information stored for each BFD section in an ELF file. This 1352 structure is allocated by elf_new_section_hook. */ 1353 1354 struct bfd_elf_section_data 1355 { 1356 /* The ELF header for this section. */ 1357 Elf_Internal_Shdr this_hdr; 1358 1359 /* Information about the REL and RELA reloc sections associated 1360 with this section, if any. */ 1361 struct bfd_elf_section_reloc_data rel, rela; 1362 1363 /* The ELF section number of this section. */ 1364 int this_idx; 1365 1366 /* Used by the backend linker when generating a shared library to 1367 record the dynamic symbol index for a section symbol 1368 corresponding to this section. A value of 0 means that there is 1369 no dynamic symbol for this section. */ 1370 int dynindx; 1371 1372 /* A pointer to the linked-to section for SHF_LINK_ORDER. */ 1373 asection *linked_to; 1374 1375 /* A pointer to the swapped relocs. If the section uses REL relocs, 1376 rather than RELA, all the r_addend fields will be zero. This 1377 pointer may be NULL. It is used by the backend linker. */ 1378 Elf_Internal_Rela *relocs; 1379 1380 /* A pointer to a linked list tracking dynamic relocs copied for 1381 local symbols. */ 1382 void *local_dynrel; 1383 1384 /* A pointer to the bfd section used for dynamic relocs. */ 1385 asection *sreloc; 1386 1387 union { 1388 /* Group name, if this section is a member of a group. */ 1389 const char *name; 1390 1391 /* Group signature sym, if this is the SHT_GROUP section. */ 1392 struct bfd_symbol *id; 1393 } group; 1394 1395 /* For a member of a group, points to the SHT_GROUP section. 1396 NULL for the SHT_GROUP section itself and non-group sections. */ 1397 asection *sec_group; 1398 1399 /* A linked list of member sections in the group. Circular when used by 1400 the linker. For the SHT_GROUP section, points at first member. */ 1401 asection *next_in_group; 1402 1403 /* The FDEs associated with this section. The u.fde.next_in_section 1404 field acts as a chain pointer. */ 1405 struct eh_cie_fde *fde_list; 1406 1407 /* A pointer used for various section optimizations. */ 1408 void *sec_info; 1409 }; 1410 1411 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) 1412 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) 1413 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) 1414 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) 1415 #define elf_group_name(sec) (elf_section_data(sec)->group.name) 1416 #define elf_group_id(sec) (elf_section_data(sec)->group.id) 1417 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) 1418 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list) 1419 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group) 1420 1421 #define xvec_get_elf_backend_data(xvec) \ 1422 ((const struct elf_backend_data *) (xvec)->backend_data) 1423 1424 #define get_elf_backend_data(abfd) \ 1425 xvec_get_elf_backend_data ((abfd)->xvec) 1426 1427 /* The least object attributes (within an attributes subsection) known 1428 for any target. Some code assumes that the value 0 is not used and 1429 the field for that attribute can instead be used as a marker to 1430 indicate that attributes have been initialized. */ 1431 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2 1432 1433 /* The maximum number of known object attributes for any target. */ 1434 #define NUM_KNOWN_OBJ_ATTRIBUTES 71 1435 1436 /* The value of an object attribute. The type indicates whether the attribute 1437 holds and integer, a string, or both. It can also indicate that there can 1438 be no default (i.e. all values must be written to file, even zero). */ 1439 1440 typedef struct obj_attribute 1441 { 1442 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0) 1443 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1) 1444 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2) 1445 1446 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL) 1447 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL) 1448 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT) 1449 1450 int type; 1451 unsigned int i; 1452 char *s; 1453 } obj_attribute; 1454 1455 typedef struct obj_attribute_list 1456 { 1457 struct obj_attribute_list *next; 1458 int tag; 1459 obj_attribute attr; 1460 } obj_attribute_list; 1461 1462 /* Object attributes may either be defined by the processor ABI, index 1463 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific 1464 (and possibly also processor-specific), index OBJ_ATTR_GNU. */ 1465 #define OBJ_ATTR_PROC 0 1466 #define OBJ_ATTR_GNU 1 1467 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC 1468 #define OBJ_ATTR_LAST OBJ_ATTR_GNU 1469 1470 /* The following object attribute tags are taken as generic, for all 1471 targets and for "gnu" where there is no target standard. */ 1472 enum 1473 { 1474 Tag_NULL = 0, 1475 Tag_File = 1, 1476 Tag_Section = 2, 1477 Tag_Symbol = 3, 1478 Tag_compatibility = 32 1479 }; 1480 1481 /* Some private data is stashed away for future use using the tdata pointer 1482 in the bfd structure. */ 1483 1484 struct elf_obj_tdata 1485 { 1486 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ 1487 Elf_Internal_Shdr **elf_sect_ptr; 1488 Elf_Internal_Phdr *phdr; 1489 struct elf_segment_map *segment_map; 1490 struct elf_strtab_hash *strtab_ptr; 1491 int num_locals; 1492 int num_globals; 1493 unsigned int num_elf_sections; /* elf_sect_ptr size */ 1494 int num_section_syms; 1495 asymbol **section_syms; /* STT_SECTION symbols for each section */ 1496 Elf_Internal_Shdr symtab_hdr; 1497 Elf_Internal_Shdr shstrtab_hdr; 1498 Elf_Internal_Shdr strtab_hdr; 1499 Elf_Internal_Shdr dynsymtab_hdr; 1500 Elf_Internal_Shdr dynstrtab_hdr; 1501 Elf_Internal_Shdr dynversym_hdr; 1502 Elf_Internal_Shdr dynverref_hdr; 1503 Elf_Internal_Shdr dynverdef_hdr; 1504 Elf_Internal_Shdr symtab_shndx_hdr; 1505 unsigned int symtab_section, shstrtab_section; 1506 unsigned int strtab_section, dynsymtab_section; 1507 unsigned int symtab_shndx_section; 1508 unsigned int dynversym_section, dynverdef_section, dynverref_section; 1509 file_ptr next_file_pos; 1510 bfd_vma gp; /* The gp value */ 1511 unsigned int gp_size; /* The gp size */ 1512 1513 /* Information grabbed from an elf core file. */ 1514 int core_signal; 1515 int core_pid; 1516 int core_lwpid; 1517 char* core_program; 1518 char* core_command; 1519 1520 /* A mapping from external symbols to entries in the linker hash 1521 table, used when linking. This is indexed by the symbol index 1522 minus the sh_info field of the symbol table header. */ 1523 struct elf_link_hash_entry **sym_hashes; 1524 1525 /* Track usage and final offsets of GOT entries for local symbols. 1526 This array is indexed by symbol index. Elements are used 1527 identically to "got" in struct elf_link_hash_entry. */ 1528 union 1529 { 1530 bfd_signed_vma *refcounts; 1531 bfd_vma *offsets; 1532 struct got_entry **ents; 1533 } local_got; 1534 1535 /* The linker ELF emulation code needs to let the backend ELF linker 1536 know what filename should be used for a dynamic object if the 1537 dynamic object is found using a search. The emulation code then 1538 sometimes needs to know what name was actually used. Until the 1539 file has been added to the linker symbol table, this field holds 1540 the name the linker wants. After it has been added, it holds the 1541 name actually used, which will be the DT_SONAME entry if there is 1542 one. */ 1543 const char *dt_name; 1544 1545 /* The linker emulation needs to know what audit libs 1546 are used by a dynamic object. */ 1547 const char *dt_audit; 1548 1549 /* Records the result of `get_program_header_size'. */ 1550 bfd_size_type program_header_size; 1551 1552 /* Used by find_nearest_line entry point. */ 1553 void *line_info; 1554 1555 /* Used by MIPS ELF find_nearest_line entry point. The structure 1556 could be included directly in this one, but there's no point to 1557 wasting the memory just for the infrequently called 1558 find_nearest_line. */ 1559 struct mips_elf_find_line *find_line_info; 1560 1561 /* A place to stash dwarf1 info for this bfd. */ 1562 struct dwarf1_debug *dwarf1_find_line_info; 1563 1564 /* A place to stash dwarf2 info for this bfd. */ 1565 void *dwarf2_find_line_info; 1566 1567 /* An array of stub sections indexed by symbol number, used by the 1568 MIPS ELF linker. FIXME: We should figure out some way to only 1569 include this field for a MIPS ELF target. */ 1570 asection **local_stubs; 1571 asection **local_call_stubs; 1572 1573 /* Used to determine if PT_GNU_EH_FRAME segment header should be 1574 created. */ 1575 asection *eh_frame_hdr; 1576 1577 Elf_Internal_Shdr **group_sect_ptr; 1578 int num_group; 1579 1580 /* Number of symbol version definitions we are about to emit. */ 1581 unsigned int cverdefs; 1582 1583 /* Number of symbol version references we are about to emit. */ 1584 unsigned int cverrefs; 1585 1586 /* Segment flags for the PT_GNU_STACK segment. */ 1587 unsigned int stack_flags; 1588 1589 /* Symbol version definitions in external objects. */ 1590 Elf_Internal_Verdef *verdef; 1591 1592 /* Symbol version references to external objects. */ 1593 Elf_Internal_Verneed *verref; 1594 1595 /* The Irix 5 support uses two virtual sections, which represent 1596 text/data symbols defined in dynamic objects. */ 1597 asymbol *elf_data_symbol; 1598 asymbol *elf_text_symbol; 1599 asection *elf_data_section; 1600 asection *elf_text_section; 1601 1602 /* A pointer to the .eh_frame section. */ 1603 asection *eh_frame_section; 1604 1605 /* Whether a dyanmic object was specified normally on the linker 1606 command line, or was specified when --as-needed was in effect, 1607 or was found via a DT_NEEDED entry. */ 1608 enum dynamic_lib_link_class dyn_lib_class; 1609 1610 /* This is set to TRUE if the object was created by the backend 1611 linker. */ 1612 bfd_boolean linker; 1613 1614 /* Irix 5 often screws up the symbol table, sorting local symbols 1615 after global symbols. This flag is set if the symbol table in 1616 this BFD appears to be screwed up. If it is, we ignore the 1617 sh_info field in the symbol table header, and always read all the 1618 symbols. */ 1619 bfd_boolean bad_symtab; 1620 1621 /* Used to determine if the e_flags field has been initialized */ 1622 bfd_boolean flags_init; 1623 1624 /* Symbol buffer. */ 1625 void *symbuf; 1626 1627 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES]; 1628 obj_attribute_list *other_obj_attributes[2]; 1629 1630 /* Called at the end of _bfd_elf_write_object_contents if not NULL. */ 1631 bfd_boolean (*after_write_object_contents) (bfd *); 1632 void *after_write_object_contents_info; 1633 1634 /* NT_GNU_BUILD_ID note type. */ 1635 bfd_size_type build_id_size; 1636 bfd_byte *build_id; 1637 1638 /* True if the bfd contains symbols that have the STT_GNU_IFUNC 1639 symbol type. Used to set the osabi field in the ELF header 1640 structure. */ 1641 bfd_boolean has_ifunc_symbols; 1642 1643 /* An identifier used to distinguish different target 1644 specific extensions to this structure. */ 1645 enum elf_target_id object_id; 1646 }; 1647 1648 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) 1649 1650 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id) 1651 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size) 1652 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) 1653 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) 1654 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) 1655 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) 1656 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) 1657 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) 1658 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr) 1659 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) 1660 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section) 1661 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section) 1662 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section) 1663 #define elf_eh_frame_section(bfd) \ 1664 (elf_tdata(bfd) -> eh_frame_section) 1665 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals) 1666 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) 1667 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) 1668 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms) 1669 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) 1670 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) 1671 #define elf_gp(bfd) (elf_tdata(bfd) -> gp) 1672 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) 1673 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) 1674 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) 1675 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) 1676 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) 1677 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) 1678 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit) 1679 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) 1680 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) 1681 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init) 1682 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes) 1683 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes) 1684 #define elf_known_obj_attributes_proc(bfd) \ 1685 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1686 #define elf_other_obj_attributes_proc(bfd) \ 1687 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1688 1689 extern void _bfd_elf_swap_verdef_in 1691 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); 1692 extern void _bfd_elf_swap_verdef_out 1693 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); 1694 extern void _bfd_elf_swap_verdaux_in 1695 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); 1696 extern void _bfd_elf_swap_verdaux_out 1697 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); 1698 extern void _bfd_elf_swap_verneed_in 1699 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); 1700 extern void _bfd_elf_swap_verneed_out 1701 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); 1702 extern void _bfd_elf_swap_vernaux_in 1703 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); 1704 extern void _bfd_elf_swap_vernaux_out 1705 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); 1706 extern void _bfd_elf_swap_versym_in 1707 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); 1708 extern void _bfd_elf_swap_versym_out 1709 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); 1710 1711 extern unsigned int _bfd_elf_section_from_bfd_section 1712 (bfd *, asection *); 1713 extern char *bfd_elf_string_from_elf_section 1714 (bfd *, unsigned, unsigned); 1715 extern Elf_Internal_Sym *bfd_elf_get_elf_syms 1716 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, 1717 Elf_External_Sym_Shndx *); 1718 extern const char *bfd_elf_sym_name 1719 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); 1720 1721 extern bfd_boolean _bfd_elf_copy_private_bfd_data 1722 (bfd *, bfd *); 1723 extern bfd_boolean _bfd_elf_print_private_bfd_data 1724 (bfd *, void *); 1725 extern void bfd_elf_print_symbol 1726 (bfd *, void *, asymbol *, bfd_print_symbol_type); 1727 1728 extern unsigned int _bfd_elf_eh_frame_address_size 1729 (bfd *, asection *); 1730 extern bfd_byte _bfd_elf_encode_eh_address 1731 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, 1732 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); 1733 extern bfd_boolean _bfd_elf_can_make_relative 1734 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); 1735 1736 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class 1737 (const Elf_Internal_Rela *); 1738 extern bfd_vma _bfd_elf_rela_local_sym 1739 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); 1740 extern bfd_vma _bfd_elf_rel_local_sym 1741 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); 1742 extern bfd_vma _bfd_elf_section_offset 1743 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1744 1745 extern unsigned long bfd_elf_hash 1746 (const char *); 1747 extern unsigned long bfd_elf_gnu_hash 1748 (const char *); 1749 1750 extern bfd_reloc_status_type bfd_elf_generic_reloc 1751 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 1752 extern bfd_boolean bfd_elf_allocate_object 1753 (bfd *, size_t, enum elf_target_id); 1754 extern bfd_boolean bfd_elf_make_object 1755 (bfd *); 1756 extern bfd_boolean bfd_elf_mkcorefile 1757 (bfd *); 1758 extern bfd_boolean _bfd_elf_make_section_from_shdr 1759 (bfd *, Elf_Internal_Shdr *, const char *, int); 1760 extern bfd_boolean _bfd_elf_make_section_from_phdr 1761 (bfd *, Elf_Internal_Phdr *, int, const char *); 1762 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc 1763 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 1764 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create 1765 (bfd *); 1766 extern void _bfd_elf_link_hash_copy_indirect 1767 (struct bfd_link_info *, struct elf_link_hash_entry *, 1768 struct elf_link_hash_entry *); 1769 extern void _bfd_elf_link_hash_hide_symbol 1770 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1771 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol 1772 (struct bfd_link_info *, struct elf_link_hash_entry *); 1773 extern bfd_boolean _bfd_elf_link_hash_table_init 1774 (struct elf_link_hash_table *, bfd *, 1775 struct bfd_hash_entry *(*) 1776 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *), 1777 unsigned int, enum elf_target_id); 1778 extern bfd_boolean _bfd_elf_slurp_version_tables 1779 (bfd *, bfd_boolean); 1780 extern bfd_boolean _bfd_elf_merge_sections 1781 (bfd *, struct bfd_link_info *); 1782 extern bfd_boolean _bfd_elf_match_sections_by_type 1783 (bfd *, const asection *, bfd *, const asection *); 1784 extern bfd_boolean bfd_elf_is_group_section 1785 (bfd *, const struct bfd_section *); 1786 extern void _bfd_elf_section_already_linked 1787 (bfd *, struct bfd_section *, struct bfd_link_info *); 1788 extern void bfd_elf_set_group_contents 1789 (bfd *, asection *, void *); 1790 extern asection *_bfd_elf_check_kept_section 1791 (asection *, struct bfd_link_info *); 1792 extern void _bfd_elf_link_just_syms 1793 (asection *, struct bfd_link_info *); 1794 extern void _bfd_elf_copy_link_hash_symbol_type 1795 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *); 1796 extern bfd_boolean _bfd_elf_size_group_sections 1797 (struct bfd_link_info *); 1798 extern bfd_boolean _bfd_elf_fixup_group_sections 1799 (bfd *, asection *); 1800 extern bfd_boolean _bfd_elf_copy_private_header_data 1801 (bfd *, bfd *); 1802 extern bfd_boolean _bfd_elf_copy_private_symbol_data 1803 (bfd *, asymbol *, bfd *, asymbol *); 1804 #define _bfd_generic_init_private_section_data \ 1805 _bfd_elf_init_private_section_data 1806 extern bfd_boolean _bfd_elf_init_private_section_data 1807 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); 1808 extern bfd_boolean _bfd_elf_copy_private_section_data 1809 (bfd *, asection *, bfd *, asection *); 1810 extern bfd_boolean _bfd_elf_write_object_contents 1811 (bfd *); 1812 extern bfd_boolean _bfd_elf_write_corefile_contents 1813 (bfd *); 1814 extern bfd_boolean _bfd_elf_set_section_contents 1815 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 1816 extern long _bfd_elf_get_symtab_upper_bound 1817 (bfd *); 1818 extern long _bfd_elf_canonicalize_symtab 1819 (bfd *, asymbol **); 1820 extern long _bfd_elf_get_dynamic_symtab_upper_bound 1821 (bfd *); 1822 extern long _bfd_elf_canonicalize_dynamic_symtab 1823 (bfd *, asymbol **); 1824 extern long _bfd_elf_get_synthetic_symtab 1825 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 1826 extern long _bfd_elf_get_reloc_upper_bound 1827 (bfd *, sec_ptr); 1828 extern long _bfd_elf_canonicalize_reloc 1829 (bfd *, sec_ptr, arelent **, asymbol **); 1830 extern asection * _bfd_elf_get_dynamic_reloc_section 1831 (bfd *, asection *, bfd_boolean); 1832 extern asection * _bfd_elf_make_dynamic_reloc_section 1833 (asection *, bfd *, unsigned int, bfd *, bfd_boolean); 1834 extern long _bfd_elf_get_dynamic_reloc_upper_bound 1835 (bfd *); 1836 extern long _bfd_elf_canonicalize_dynamic_reloc 1837 (bfd *, arelent **, asymbol **); 1838 extern asymbol *_bfd_elf_make_empty_symbol 1839 (bfd *); 1840 extern void _bfd_elf_get_symbol_info 1841 (bfd *, asymbol *, symbol_info *); 1842 extern bfd_boolean _bfd_elf_is_local_label_name 1843 (bfd *, const char *); 1844 extern alent *_bfd_elf_get_lineno 1845 (bfd *, asymbol *); 1846 extern bfd_boolean _bfd_elf_set_arch_mach 1847 (bfd *, enum bfd_architecture, unsigned long); 1848 extern bfd_boolean _bfd_elf_find_nearest_line 1849 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1850 unsigned int *); 1851 extern bfd_boolean _bfd_elf_find_line 1852 (bfd *, asymbol **, asymbol *, const char **, unsigned int *); 1853 #define _bfd_generic_find_line _bfd_elf_find_line 1854 extern bfd_boolean _bfd_elf_find_inliner_info 1855 (bfd *, const char **, const char **, unsigned int *); 1856 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols 1857 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 1858 extern int _bfd_elf_sizeof_headers 1859 (bfd *, struct bfd_link_info *); 1860 extern bfd_boolean _bfd_elf_new_section_hook 1861 (bfd *, asection *); 1862 extern bfd_boolean _bfd_elf_init_reloc_shdr 1863 (bfd *, struct bfd_elf_section_reloc_data *, asection *, bfd_boolean); 1864 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section 1865 (const char *, const struct bfd_elf_special_section *, unsigned int); 1866 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr 1867 (bfd *, asection *); 1868 1869 /* If the target doesn't have reloc handling written yet: */ 1870 extern void _bfd_elf_no_info_to_howto 1871 (bfd *, arelent *, Elf_Internal_Rela *); 1872 1873 extern bfd_boolean bfd_section_from_shdr 1874 (bfd *, unsigned int shindex); 1875 extern bfd_boolean bfd_section_from_phdr 1876 (bfd *, Elf_Internal_Phdr *, int); 1877 1878 extern int _bfd_elf_symbol_from_bfd_symbol 1879 (bfd *, asymbol **); 1880 1881 extern Elf_Internal_Sym *bfd_sym_from_r_symndx 1882 (struct sym_cache *, bfd *, unsigned long); 1883 extern asection *bfd_section_from_elf_index 1884 (bfd *, unsigned int); 1885 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init 1886 (void); 1887 1888 extern struct elf_strtab_hash * _bfd_elf_strtab_init 1889 (void); 1890 extern void _bfd_elf_strtab_free 1891 (struct elf_strtab_hash *); 1892 extern bfd_size_type _bfd_elf_strtab_add 1893 (struct elf_strtab_hash *, const char *, bfd_boolean); 1894 extern void _bfd_elf_strtab_addref 1895 (struct elf_strtab_hash *, bfd_size_type); 1896 extern void _bfd_elf_strtab_delref 1897 (struct elf_strtab_hash *, bfd_size_type); 1898 extern void _bfd_elf_strtab_clear_all_refs 1899 (struct elf_strtab_hash *); 1900 extern bfd_size_type _bfd_elf_strtab_size 1901 (struct elf_strtab_hash *); 1902 extern bfd_size_type _bfd_elf_strtab_offset 1903 (struct elf_strtab_hash *, bfd_size_type); 1904 extern bfd_boolean _bfd_elf_strtab_emit 1905 (bfd *, struct elf_strtab_hash *); 1906 extern void _bfd_elf_strtab_finalize 1907 (struct elf_strtab_hash *); 1908 1909 extern void _bfd_elf_begin_eh_frame_parsing 1910 (struct bfd_link_info *info); 1911 extern void _bfd_elf_parse_eh_frame 1912 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *); 1913 extern void _bfd_elf_end_eh_frame_parsing 1914 (struct bfd_link_info *info); 1915 1916 extern bfd_boolean _bfd_elf_discard_section_eh_frame 1917 (bfd *, struct bfd_link_info *, asection *, 1918 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); 1919 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr 1920 (bfd *, struct bfd_link_info *); 1921 extern bfd_vma _bfd_elf_eh_frame_section_offset 1922 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1923 extern bfd_boolean _bfd_elf_write_section_eh_frame 1924 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1925 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr 1926 (bfd *, struct bfd_link_info *); 1927 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr 1928 (struct bfd_link_info *); 1929 1930 extern bfd_boolean _bfd_elf_merge_symbol 1931 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, 1932 asection **, bfd_vma *, unsigned int *, 1933 struct elf_link_hash_entry **, bfd_boolean *, 1934 bfd_boolean *, bfd_boolean *, bfd_boolean *); 1935 1936 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); 1937 1938 extern long _bfd_elf_link_lookup_local_dynindx 1939 (struct bfd_link_info *, bfd *, long); 1940 extern bfd_boolean _bfd_elf_compute_section_file_positions 1941 (bfd *, struct bfd_link_info *); 1942 extern void _bfd_elf_assign_file_positions_for_relocs 1943 (bfd *); 1944 extern file_ptr _bfd_elf_assign_file_position_for_section 1945 (Elf_Internal_Shdr *, file_ptr, bfd_boolean); 1946 1947 extern bfd_boolean _bfd_elf_validate_reloc 1948 (bfd *, arelent *); 1949 1950 extern bfd_boolean _bfd_elf_link_create_dynamic_sections 1951 (bfd *, struct bfd_link_info *); 1952 extern bfd_boolean _bfd_elf_link_omit_section_dynsym 1953 (bfd *, struct bfd_link_info *, asection *); 1954 extern bfd_boolean _bfd_elf_create_dynamic_sections 1955 (bfd *, struct bfd_link_info *); 1956 extern bfd_boolean _bfd_elf_create_got_section 1957 (bfd *, struct bfd_link_info *); 1958 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym 1959 (bfd *, struct bfd_link_info *, asection *, const char *); 1960 extern void _bfd_elf_init_1_index_section 1961 (bfd *, struct bfd_link_info *); 1962 extern void _bfd_elf_init_2_index_sections 1963 (bfd *, struct bfd_link_info *); 1964 1965 extern bfd_boolean _bfd_elfcore_make_pseudosection 1966 (bfd *, char *, size_t, ufile_ptr); 1967 extern char *_bfd_elfcore_strndup 1968 (bfd *, char *, size_t); 1969 1970 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs 1971 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); 1972 1973 extern bfd_boolean _bfd_elf_link_output_relocs 1974 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1975 struct elf_link_hash_entry **); 1976 1977 extern bfd_boolean _bfd_elf_adjust_dynamic_copy 1978 (struct elf_link_hash_entry *, asection *); 1979 1980 extern bfd_boolean _bfd_elf_dynamic_symbol_p 1981 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1982 1983 extern bfd_boolean _bfd_elf_symbol_refs_local_p 1984 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1985 1986 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation 1987 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma); 1988 1989 extern bfd_boolean _bfd_elf_setup_sections 1990 (bfd *); 1991 1992 extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *); 1993 1994 extern const bfd_target *bfd_elf32_object_p 1995 (bfd *); 1996 extern const bfd_target *bfd_elf32_core_file_p 1997 (bfd *); 1998 extern char *bfd_elf32_core_file_failing_command 1999 (bfd *); 2000 extern int bfd_elf32_core_file_failing_signal 2001 (bfd *); 2002 extern bfd_boolean bfd_elf32_core_file_matches_executable_p 2003 (bfd *, bfd *); 2004 extern int bfd_elf32_core_file_pid 2005 (bfd *); 2006 2007 extern bfd_boolean bfd_elf32_swap_symbol_in 2008 (bfd *, const void *, const void *, Elf_Internal_Sym *); 2009 extern void bfd_elf32_swap_symbol_out 2010 (bfd *, const Elf_Internal_Sym *, void *, void *); 2011 extern void bfd_elf32_swap_reloc_in 2012 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2013 extern void bfd_elf32_swap_reloc_out 2014 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2015 extern void bfd_elf32_swap_reloca_in 2016 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2017 extern void bfd_elf32_swap_reloca_out 2018 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2019 extern void bfd_elf32_swap_phdr_in 2020 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); 2021 extern void bfd_elf32_swap_phdr_out 2022 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); 2023 extern void bfd_elf32_swap_dyn_in 2024 (bfd *, const void *, Elf_Internal_Dyn *); 2025 extern void bfd_elf32_swap_dyn_out 2026 (bfd *, const Elf_Internal_Dyn *, void *); 2027 extern long bfd_elf32_slurp_symbol_table 2028 (bfd *, asymbol **, bfd_boolean); 2029 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr 2030 (bfd *); 2031 extern int bfd_elf32_write_out_phdrs 2032 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2033 extern bfd_boolean bfd_elf32_checksum_contents 2034 (bfd * , void (*) (const void *, size_t, void *), void *); 2035 extern void bfd_elf32_write_relocs 2036 (bfd *, asection *, void *); 2037 extern bfd_boolean bfd_elf32_slurp_reloc_table 2038 (bfd *, asection *, asymbol **, bfd_boolean); 2039 2040 extern const bfd_target *bfd_elf64_object_p 2041 (bfd *); 2042 extern const bfd_target *bfd_elf64_core_file_p 2043 (bfd *); 2044 extern char *bfd_elf64_core_file_failing_command 2045 (bfd *); 2046 extern int bfd_elf64_core_file_failing_signal 2047 (bfd *); 2048 extern bfd_boolean bfd_elf64_core_file_matches_executable_p 2049 (bfd *, bfd *); 2050 extern int bfd_elf64_core_file_pid 2051 (bfd *); 2052 2053 extern bfd_boolean bfd_elf64_swap_symbol_in 2054 (bfd *, const void *, const void *, Elf_Internal_Sym *); 2055 extern void bfd_elf64_swap_symbol_out 2056 (bfd *, const Elf_Internal_Sym *, void *, void *); 2057 extern void bfd_elf64_swap_reloc_in 2058 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2059 extern void bfd_elf64_swap_reloc_out 2060 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2061 extern void bfd_elf64_swap_reloca_in 2062 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2063 extern void bfd_elf64_swap_reloca_out 2064 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2065 extern void bfd_elf64_swap_phdr_in 2066 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); 2067 extern void bfd_elf64_swap_phdr_out 2068 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); 2069 extern void bfd_elf64_swap_dyn_in 2070 (bfd *, const void *, Elf_Internal_Dyn *); 2071 extern void bfd_elf64_swap_dyn_out 2072 (bfd *, const Elf_Internal_Dyn *, void *); 2073 extern long bfd_elf64_slurp_symbol_table 2074 (bfd *, asymbol **, bfd_boolean); 2075 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr 2076 (bfd *); 2077 extern int bfd_elf64_write_out_phdrs 2078 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2079 extern bfd_boolean bfd_elf64_checksum_contents 2080 (bfd * , void (*) (const void *, size_t, void *), void *); 2081 extern void bfd_elf64_write_relocs 2082 (bfd *, asection *, void *); 2083 extern bfd_boolean bfd_elf64_slurp_reloc_table 2084 (bfd *, asection *, asymbol **, bfd_boolean); 2085 2086 extern bfd_boolean _bfd_elf_default_relocs_compatible 2087 (const bfd_target *, const bfd_target *); 2088 2089 extern bfd_boolean _bfd_elf_relocs_compatible 2090 (const bfd_target *, const bfd_target *); 2091 2092 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup 2093 (bfd *, struct bfd_link_info *, const char *); 2094 extern bfd_boolean bfd_elf_link_add_symbols 2095 (bfd *, struct bfd_link_info *); 2096 extern bfd_boolean _bfd_elf_add_dynamic_entry 2097 (struct bfd_link_info *, bfd_vma, bfd_vma); 2098 2099 extern bfd_boolean bfd_elf_link_record_dynamic_symbol 2100 (struct bfd_link_info *, struct elf_link_hash_entry *); 2101 2102 extern int bfd_elf_link_record_local_dynamic_symbol 2103 (struct bfd_link_info *, bfd *, long); 2104 2105 extern bfd_boolean _bfd_elf_close_and_cleanup 2106 (bfd *); 2107 2108 extern bfd_boolean _bfd_elf_common_definition 2109 (Elf_Internal_Sym *); 2110 2111 extern unsigned int _bfd_elf_common_section_index 2112 (asection *); 2113 2114 extern asection *_bfd_elf_common_section 2115 (asection *); 2116 2117 extern void _bfd_dwarf2_cleanup_debug_info 2118 (bfd *); 2119 2120 extern bfd_vma _bfd_elf_default_got_elt_size 2121 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *, 2122 unsigned long); 2123 2124 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 2125 (bfd *, arelent *, struct bfd_symbol *, void *, 2126 asection *, bfd *, char **); 2127 2128 extern bfd_boolean bfd_elf_final_link 2129 (bfd *, struct bfd_link_info *); 2130 2131 extern void _bfd_elf_gc_keep 2132 (struct bfd_link_info *info); 2133 2134 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol 2135 (struct elf_link_hash_entry *h, void *inf); 2136 2137 extern bfd_boolean bfd_elf_gc_sections 2138 (bfd *, struct bfd_link_info *); 2139 2140 extern bfd_boolean bfd_elf_gc_record_vtinherit 2141 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2142 2143 extern bfd_boolean bfd_elf_gc_record_vtentry 2144 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2145 2146 extern asection *_bfd_elf_gc_mark_hook 2147 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 2148 struct elf_link_hash_entry *, Elf_Internal_Sym *); 2149 2150 extern asection *_bfd_elf_gc_mark_rsec 2151 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2152 struct elf_reloc_cookie *); 2153 2154 extern bfd_boolean _bfd_elf_gc_mark_reloc 2155 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2156 struct elf_reloc_cookie *); 2157 2158 extern bfd_boolean _bfd_elf_gc_mark_fdes 2159 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn, 2160 struct elf_reloc_cookie *); 2161 2162 extern bfd_boolean _bfd_elf_gc_mark 2163 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn); 2164 2165 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets 2166 (bfd *, struct bfd_link_info *); 2167 2168 extern bfd_boolean bfd_elf_gc_common_final_link 2169 (bfd *, struct bfd_link_info *); 2170 2171 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p 2172 (bfd_vma, void *); 2173 2174 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment 2175 (bfd *, asection *); 2176 2177 extern bfd_boolean _bfd_elf_map_sections_to_segments 2178 (bfd *, struct bfd_link_info *); 2179 2180 extern bfd_boolean _bfd_elf_is_function_type (unsigned int); 2181 2182 extern int bfd_elf_get_default_section_type (flagword); 2183 2184 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section 2185 (bfd * abfd, asection * section); 2186 2187 /* Exported interface for writing elf corefile notes. */ 2188 extern char *elfcore_write_note 2189 (bfd *, char *, int *, const char *, int, const void *, int); 2190 extern char *elfcore_write_prpsinfo 2191 (bfd *, char *, int *, const char *, const char *); 2192 extern char *elfcore_write_prstatus 2193 (bfd *, char *, int *, long, int, const void *); 2194 extern char * elfcore_write_pstatus 2195 (bfd *, char *, int *, long, int, const void *); 2196 extern char *elfcore_write_prfpreg 2197 (bfd *, char *, int *, const void *, int); 2198 extern char *elfcore_write_prxfpreg 2199 (bfd *, char *, int *, const void *, int); 2200 extern char *elfcore_write_xstatereg 2201 (bfd *, char *, int *, const void *, int); 2202 extern char *elfcore_write_ppc_vmx 2203 (bfd *, char *, int *, const void *, int); 2204 extern char *elfcore_write_ppc_vsx 2205 (bfd *, char *, int *, const void *, int); 2206 extern char *elfcore_write_s390_timer 2207 (bfd *, char *, int *, const void *, int); 2208 extern char *elfcore_write_s390_todcmp 2209 (bfd *, char *, int *, const void *, int); 2210 extern char *elfcore_write_s390_todpreg 2211 (bfd *, char *, int *, const void *, int); 2212 extern char *elfcore_write_s390_ctrs 2213 (bfd *, char *, int *, const void *, int); 2214 extern char *elfcore_write_s390_prefix 2215 (bfd *, char *, int *, const void *, int); 2216 extern char *elfcore_write_lwpstatus 2217 (bfd *, char *, int *, long, int, const void *); 2218 extern char *elfcore_write_register_note 2219 (bfd *, char *, int *, const char *, const void *, int); 2220 2221 extern bfd *_bfd_elf32_bfd_from_remote_memory 2222 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2223 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 2224 extern bfd *_bfd_elf64_bfd_from_remote_memory 2225 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2226 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 2227 2228 extern bfd_vma bfd_elf_obj_attr_size (bfd *); 2229 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma); 2230 extern int bfd_elf_get_obj_attr_int (bfd *, int, int); 2231 extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int); 2232 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \ 2233 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2234 extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *); 2235 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \ 2236 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2237 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int, 2238 const char *); 2239 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \ 2240 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \ 2241 (INTVAL), (STRVAL)) 2242 2243 extern char *_bfd_elf_attr_strdup (bfd *, const char *); 2244 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *); 2245 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int); 2246 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *); 2247 extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *); 2248 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int); 2249 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *); 2250 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec); 2251 2252 /* The linker may needs to keep track of the number of relocs that it 2253 decides to copy as dynamic relocs in check_relocs for each symbol. 2254 This is so that it can later discard them if they are found to be 2255 unnecessary. We can store the information in a field extending the 2256 regular ELF linker hash table. */ 2257 2258 struct elf_dyn_relocs 2259 { 2260 struct elf_dyn_relocs *next; 2261 2262 /* The input section of the reloc. */ 2263 asection *sec; 2264 2265 /* Total number of relocs copied for the input section. */ 2266 bfd_size_type count; 2267 2268 /* Number of pc-relative relocs copied for the input section. */ 2269 bfd_size_type pc_count; 2270 }; 2271 2272 extern bfd_boolean _bfd_elf_create_ifunc_sections 2273 (bfd *, struct bfd_link_info *); 2274 extern asection * _bfd_elf_create_ifunc_dyn_reloc 2275 (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc, 2276 struct elf_dyn_relocs **); 2277 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs 2278 (struct bfd_link_info *, struct elf_link_hash_entry *, 2279 struct elf_dyn_relocs **, unsigned int, unsigned int); 2280 2281 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *); 2282 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *); 2283 2284 extern bfd_vma elf64_r_info (bfd_vma, bfd_vma); 2285 extern bfd_vma elf64_r_sym (bfd_vma); 2286 extern bfd_vma elf32_r_info (bfd_vma, bfd_vma); 2287 extern bfd_vma elf32_r_sym (bfd_vma); 2288 2289 /* Large common section. */ 2290 extern asection _bfd_elf_large_com_section; 2291 2292 /* Hash for local symbol with the first section id, ID, in the input 2293 file and the local symbol index, SYM. */ 2294 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \ 2295 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \ 2296 ^ (SYM) ^ ((ID) >> 16)) 2297 2298 /* This is the condition under which finish_dynamic_symbol will be called. 2299 If our finish_dynamic_symbol isn't called, we'll need to do something 2300 about initializing any .plt and .got entries in relocate_section. */ 2301 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ 2302 ((DYN) \ 2303 && ((SHARED) || !(H)->forced_local) \ 2304 && ((H)->dynindx != -1 || (H)->forced_local)) 2305 2306 /* This macro is to avoid lots of duplicated code in the body 2307 of xxx_relocate_section() in the various elfxx-xxxx.c files. */ 2308 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ 2309 r_symndx, symtab_hdr, sym_hashes, \ 2310 h, sec, relocation, \ 2311 unresolved_reloc, warned) \ 2312 do \ 2313 { \ 2314 /* It seems this can happen with erroneous or unsupported \ 2315 input (mixing a.out and elf in an archive, for example.) */ \ 2316 if (sym_hashes == NULL) \ 2317 return FALSE; \ 2318 \ 2319 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ 2320 \ 2321 while (h->root.type == bfd_link_hash_indirect \ 2322 || h->root.type == bfd_link_hash_warning) \ 2323 h = (struct elf_link_hash_entry *) h->root.u.i.link; \ 2324 \ 2325 warned = FALSE; \ 2326 unresolved_reloc = FALSE; \ 2327 relocation = 0; \ 2328 if (h->root.type == bfd_link_hash_defined \ 2329 || h->root.type == bfd_link_hash_defweak) \ 2330 { \ 2331 sec = h->root.u.def.section; \ 2332 if (sec == NULL \ 2333 || sec->output_section == NULL) \ 2334 /* Set a flag that will be cleared later if we find a \ 2335 relocation value for this symbol. output_section \ 2336 is typically NULL for symbols satisfied by a shared \ 2337 library. */ \ 2338 unresolved_reloc = TRUE; \ 2339 else \ 2340 relocation = (h->root.u.def.value \ 2341 + sec->output_section->vma \ 2342 + sec->output_offset); \ 2343 } \ 2344 else if (h->root.type == bfd_link_hash_undefweak) \ 2345 ; \ 2346 else if (info->unresolved_syms_in_objects == RM_IGNORE \ 2347 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ 2348 ; \ 2349 else if (!info->relocatable) \ 2350 { \ 2351 bfd_boolean err; \ 2352 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ 2353 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ 2354 if (!info->callbacks->undefined_symbol (info, \ 2355 h->root.root.string, \ 2356 input_bfd, \ 2357 input_section, \ 2358 rel->r_offset, err)) \ 2359 return FALSE; \ 2360 warned = TRUE; \ 2361 } \ 2362 (void) unresolved_reloc; \ 2363 (void) warned; \ 2364 } \ 2365 while (0) 2366 2367 /* This macro is to avoid lots of duplicated code in the body of the 2368 loop over relocations in xxx_relocate_section() in the various 2369 elfxx-xxxx.c files. 2370 2371 Handle relocations against symbols from removed linkonce sections, 2372 or sections discarded by a linker script. When doing a relocatable 2373 link, we remove such relocations. Otherwise, we just want the 2374 section contents zeroed and avoid any special processing. */ 2375 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ 2376 rel, relend, howto, contents) \ 2377 { \ 2378 _bfd_clear_contents (howto, input_bfd, input_section, \ 2379 contents + rel->r_offset); \ 2380 \ 2381 if (info->relocatable \ 2382 && (input_section->flags & SEC_DEBUGGING)) \ 2383 { \ 2384 /* Only remove relocations in debug sections since other \ 2385 sections may require relocations. */ \ 2386 Elf_Internal_Shdr *rel_hdr; \ 2387 \ 2388 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ 2389 \ 2390 /* Avoid empty output section. */ \ 2391 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ 2392 { \ 2393 rel_hdr->sh_size -= rel_hdr->sh_entsize; \ 2394 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ 2395 rel_hdr->sh_size -= rel_hdr->sh_entsize; \ 2396 \ 2397 memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \ 2398 \ 2399 input_section->reloc_count--; \ 2400 relend--; \ 2401 rel--; \ 2402 continue; \ 2403 } \ 2404 } \ 2405 \ 2406 rel->r_info = 0; \ 2407 rel->r_addend = 0; \ 2408 continue; \ 2409 } 2410 2411 /* Will a symbol be bound to the the definition within the shared 2412 library, if any. A unique symbol can never be bound locally. */ 2413 #define SYMBOLIC_BIND(INFO, H) \ 2414 (!(H)->unique_global \ 2415 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))) 2416 2417 #endif /* _LIBELF_H_ */ 2418
Indexes created Thu Sep 10 00:26:39 UTC 2026