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, 2011 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; 85 struct got_entry; 86 struct plt_entry; 87 88 union gotplt_union 89 { 90 bfd_signed_vma refcount; 91 bfd_vma offset; 92 struct got_entry *glist; 93 struct plt_entry *plist; 94 }; 95 96 struct elf_link_virtual_table_entry 97 { 98 /* Virtual table entry use information. This array is nominally of size 99 size/sizeof(target_void_pointer), though we have to be able to assume 100 and track a size while the symbol is still undefined. It is indexed 101 via offset/sizeof(target_void_pointer). */ 102 size_t size; 103 bfd_boolean *used; 104 105 /* Virtual table derivation info. */ 106 struct elf_link_hash_entry *parent; 107 }; 108 109 /* ELF linker hash table entries. */ 110 111 struct elf_link_hash_entry 112 { 113 struct bfd_link_hash_entry root; 114 115 /* Symbol index in output file. This is initialized to -1. It is 116 set to -2 if the symbol is used by a reloc. */ 117 long indx; 118 119 /* Symbol index as a dynamic symbol. Initialized to -1, and remains 120 -1 if this is not a dynamic symbol. */ 121 /* ??? Note that this is consistently used as a synonym for tests 122 against whether we can perform various simplifying transformations 123 to the code. (E.g. changing a pc-relative jump to a PLT entry 124 into a pc-relative jump to the target function.) That test, which 125 is often relatively complex, and someplaces wrong or incomplete, 126 should really be replaced by a predicate in elflink.c. 127 128 End result: this field -1 does not indicate that the symbol is 129 not in the dynamic symbol table, but rather that the symbol is 130 not visible outside this DSO. */ 131 long dynindx; 132 133 /* If this symbol requires an entry in the global offset table, the 134 processor specific backend uses this field to track usage and 135 final offset. Two schemes are supported: The first assumes that 136 a symbol may only have one GOT entry, and uses REFCOUNT until 137 size_dynamic_sections, at which point the contents of the .got is 138 fixed. Afterward, if OFFSET is -1, then the symbol does not 139 require a global offset table entry. The second scheme allows 140 multiple GOT entries per symbol, managed via a linked list 141 pointed to by GLIST. */ 142 union gotplt_union got; 143 144 /* Same, but tracks a procedure linkage table entry. */ 145 union gotplt_union plt; 146 147 /* Symbol size. */ 148 bfd_size_type size; 149 150 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */ 151 unsigned int type : 8; 152 153 /* Symbol st_other value, symbol visibility. */ 154 unsigned int other : 8; 155 156 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */ 157 unsigned int target_internal : 8; 158 159 /* Symbol is referenced by a non-shared object (other than the object 160 in which it is defined). */ 161 unsigned int ref_regular : 1; 162 /* Symbol is defined by a non-shared object. */ 163 unsigned int def_regular : 1; 164 /* Symbol is referenced by a shared object. */ 165 unsigned int ref_dynamic : 1; 166 /* Symbol is defined by a shared object. */ 167 unsigned int def_dynamic : 1; 168 /* Symbol has a non-weak reference from a non-shared object (other than 169 the object in which it is defined). */ 170 unsigned int ref_regular_nonweak : 1; 171 /* Dynamic symbol has been adjustd. */ 172 unsigned int dynamic_adjusted : 1; 173 /* Symbol needs a copy reloc. */ 174 unsigned int needs_copy : 1; 175 /* Symbol needs a procedure linkage table entry. */ 176 unsigned int needs_plt : 1; 177 /* Symbol appears in a non-ELF input file. */ 178 unsigned int non_elf : 1; 179 /* Symbol should be marked as hidden in the version information. */ 180 unsigned int hidden : 1; 181 /* Symbol was forced to local scope due to a version script file. */ 182 unsigned int forced_local : 1; 183 /* Symbol was forced to be dynamic due to a version script file. */ 184 unsigned int dynamic : 1; 185 /* Symbol was marked during garbage collection. */ 186 unsigned int mark : 1; 187 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is 188 not currently set by all the backends. */ 189 unsigned int non_got_ref : 1; 190 /* Symbol has a definition in a shared object. 191 FIXME: There is no real need for this field if def_dynamic is never 192 cleared and all places that test def_dynamic also test def_regular. */ 193 unsigned int dynamic_def : 1; 194 /* Symbol is weak in all shared objects. */ 195 unsigned int dynamic_weak : 1; 196 /* Symbol is referenced with a relocation where C/C++ pointer equality 197 matters. */ 198 unsigned int pointer_equality_needed : 1; 199 /* Symbol is a unique global symbol. */ 200 unsigned int unique_global : 1; 201 202 /* String table index in .dynstr if this is a dynamic symbol. */ 203 unsigned long dynstr_index; 204 205 union 206 { 207 /* If this is a weak defined symbol from a dynamic object, this 208 field points to a defined symbol with the same value, if there is 209 one. Otherwise it is NULL. */ 210 struct elf_link_hash_entry *weakdef; 211 212 /* Hash value of the name computed using the ELF hash function. 213 Used part way through size_dynamic_sections, after we've finished 214 with weakdefs. */ 215 unsigned long elf_hash_value; 216 } u; 217 218 /* Version information. */ 219 union 220 { 221 /* This field is used for a symbol which is not defined in a 222 regular object. It points to the version information read in 223 from the dynamic object. */ 224 Elf_Internal_Verdef *verdef; 225 /* This field is used for a symbol which is defined in a regular 226 object. It is set up in size_dynamic_sections. It points to 227 the version information we should write out for this symbol. */ 228 struct bfd_elf_version_tree *vertree; 229 } verinfo; 230 231 struct elf_link_virtual_table_entry *vtable; 232 }; 233 234 /* Will references to this symbol always reference the symbol 235 in this object? */ 236 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \ 237 _bfd_elf_symbol_refs_local_p (H, INFO, 0) 238 239 /* Will _calls_ to this symbol always call the version in this object? */ 240 #define SYMBOL_CALLS_LOCAL(INFO, H) \ 241 _bfd_elf_symbol_refs_local_p (H, INFO, 1) 242 243 /* Common symbols that are turned into definitions don't have the 244 DEF_REGULAR flag set, so they might appear to be undefined. */ 245 #define ELF_COMMON_DEF_P(H) \ 246 (!(H)->def_regular \ 247 && !(H)->def_dynamic \ 248 && (H)->root.type == bfd_link_hash_defined) 249 250 /* Records local symbols to be emitted in the dynamic symbol table. */ 251 252 struct elf_link_local_dynamic_entry 253 { 254 struct elf_link_local_dynamic_entry *next; 255 256 /* The input bfd this symbol came from. */ 257 bfd *input_bfd; 258 259 /* The index of the local symbol being copied. */ 260 long input_indx; 261 262 /* The index in the outgoing dynamic symbol table. */ 263 long dynindx; 264 265 /* A copy of the input symbol. */ 266 Elf_Internal_Sym isym; 267 }; 268 269 struct elf_link_loaded_list 270 { 271 struct elf_link_loaded_list *next; 272 bfd *abfd; 273 }; 274 275 /* Structures used by the eh_frame optimization code. */ 276 struct eh_cie_fde 277 { 278 union { 279 struct { 280 /* If REMOVED == 1, this is the CIE that the FDE originally used. 281 The CIE belongs to the same .eh_frame input section as the FDE. 282 283 If REMOVED == 0, this is the CIE that we have chosen to use for 284 the output FDE. The CIE's REMOVED field is also 0, but the CIE 285 might belong to a different .eh_frame input section from the FDE. */ 286 struct eh_cie_fde *cie_inf; 287 struct eh_cie_fde *next_for_section; 288 } fde; 289 struct { 290 /* CIEs have three states: 291 292 - REMOVED && !MERGED: Slated for removal because we haven't yet 293 proven that an FDE needs it. FULL_CIE, if nonnull, points to 294 more detailed information about the CIE. 295 296 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH, 297 which may not belong to the same input section. 298 299 - !REMOVED: We have decided to keep this CIE. SEC is the 300 .eh_frame input section that contains the CIE. */ 301 union { 302 struct cie *full_cie; 303 struct eh_cie_fde *merged_with; 304 asection *sec; 305 } u; 306 307 /* The offset of the personality data from the start of the CIE, 308 or 0 if the CIE doesn't have any. */ 309 unsigned int personality_offset : 8; 310 311 /* True if we have marked relocations associated with this CIE. */ 312 unsigned int gc_mark : 1; 313 314 /* True if we have decided to turn an absolute LSDA encoding into 315 a PC-relative one. */ 316 unsigned int make_lsda_relative : 1; 317 318 /* True if we have decided to turn an absolute personality 319 encoding into a PC-relative one. */ 320 unsigned int make_per_encoding_relative : 1; 321 322 /* True if the CIE contains personality data and if that 323 data uses a PC-relative encoding. Always true when 324 make_per_encoding_relative is. */ 325 unsigned int per_encoding_relative : 1; 326 327 /* True if we need to add an 'R' (FDE encoding) entry to the 328 CIE's augmentation data. */ 329 unsigned int add_fde_encoding : 1; 330 331 /* True if we have merged this CIE with another. */ 332 unsigned int merged : 1; 333 334 /* Unused bits. */ 335 unsigned int pad1 : 18; 336 } cie; 337 } u; 338 unsigned int reloc_index; 339 unsigned int size; 340 unsigned int offset; 341 unsigned int new_offset; 342 unsigned int fde_encoding : 8; 343 unsigned int lsda_encoding : 8; 344 unsigned int lsda_offset : 8; 345 346 /* True if this entry represents a CIE, false if it represents an FDE. */ 347 unsigned int cie : 1; 348 349 /* True if this entry is currently marked for removal. */ 350 unsigned int removed : 1; 351 352 /* True if we need to add a 'z' (augmentation size) entry to the CIE's 353 augmentation data, and an associated byte to each of the CIE's FDEs. */ 354 unsigned int add_augmentation_size : 1; 355 356 /* True if we have decided to convert absolute FDE relocations into 357 relative ones. This applies to the first relocation in the FDE, 358 which is against the code that the FDE describes. */ 359 unsigned int make_relative : 1; 360 361 /* Unused bits. */ 362 unsigned int pad1 : 4; 363 364 unsigned int *set_loc; 365 }; 366 367 struct eh_frame_sec_info 368 { 369 unsigned int count; 370 struct cie *cies; 371 struct eh_cie_fde entry[1]; 372 }; 373 374 struct eh_frame_array_ent 375 { 376 bfd_vma initial_loc; 377 bfd_vma fde; 378 }; 379 380 struct htab; 381 382 struct eh_frame_hdr_info 383 { 384 struct htab *cies; 385 asection *hdr_sec; 386 unsigned int fde_count, array_count; 387 struct eh_frame_array_ent *array; 388 /* TRUE if we should try to merge CIEs between input sections. */ 389 bfd_boolean merge_cies; 390 /* TRUE if all .eh_frames have been parsd. */ 391 bfd_boolean parsed_eh_frames; 392 /* TRUE if .eh_frame_hdr should contain the sorted search table. 393 We build it if we successfully read all .eh_frame input sections 394 and recognize them. */ 395 bfd_boolean table; 396 }; 397 398 /* Enum used to identify target specific extensions to the elf_obj_tdata 399 and elf_link_hash_table structures. Note the enums deliberately start 400 from 1 so that we can detect an uninitialized field. The generic value 401 is last so that additions to this enum do not need to modify more than 402 one line. */ 403 enum elf_target_id 404 { 405 ALPHA_ELF_DATA = 1, 406 ARM_ELF_DATA, 407 AVR_ELF_DATA, 408 BFIN_ELF_DATA, 409 CRIS_ELF_DATA, 410 FRV_ELF_DATA, 411 HPPA32_ELF_DATA, 412 HPPA64_ELF_DATA, 413 I386_ELF_DATA, 414 IA64_ELF_DATA, 415 LM32_ELF_DATA, 416 M32R_ELF_DATA, 417 M68HC11_ELF_DATA, 418 M68K_ELF_DATA, 419 MICROBLAZE_ELF_DATA, 420 MIPS_ELF_DATA, 421 MN10300_ELF_DATA, 422 PPC32_ELF_DATA, 423 PPC64_ELF_DATA, 424 S390_ELF_DATA, 425 SH_ELF_DATA, 426 SPARC_ELF_DATA, 427 SPU_ELF_DATA, 428 TIC6X_ELF_DATA, 429 X86_64_ELF_DATA, 430 XTENSA_ELF_DATA, 431 TILEGX_ELF_DATA, 432 TILEPRO_ELF_DATA, 433 GENERIC_ELF_DATA 434 }; 435 436 /* ELF linker hash table. */ 437 438 struct elf_link_hash_table 439 { 440 struct bfd_link_hash_table root; 441 442 /* An identifier used to distinguish different target 443 specific extensions to this structure. */ 444 enum elf_target_id hash_table_id; 445 446 /* Whether we have created the special dynamic sections required 447 when linking against or generating a shared object. */ 448 bfd_boolean dynamic_sections_created; 449 450 /* True if this target has relocatable executables, so needs dynamic 451 section symbols. */ 452 bfd_boolean is_relocatable_executable; 453 454 /* The BFD used to hold special sections created by the linker. 455 This will be the first BFD found which requires these sections to 456 be created. */ 457 bfd *dynobj; 458 459 /* The value to use when initialising got.refcount/offset and 460 plt.refcount/offset in an elf_link_hash_entry. Set to zero when 461 the values are refcounts. Set to init_got_offset/init_plt_offset 462 in size_dynamic_sections when the values may be offsets. */ 463 union gotplt_union init_got_refcount; 464 union gotplt_union init_plt_refcount; 465 466 /* The value to use for got.refcount/offset and plt.refcount/offset 467 when the values may be offsets. Normally (bfd_vma) -1. */ 468 union gotplt_union init_got_offset; 469 union gotplt_union init_plt_offset; 470 471 /* The number of symbols found in the link which must be put into 472 the .dynsym section. */ 473 bfd_size_type dynsymcount; 474 475 /* The string table of dynamic symbols, which becomes the .dynstr 476 section. */ 477 struct elf_strtab_hash *dynstr; 478 479 /* The number of buckets in the hash table in the .hash section. 480 This is based on the number of dynamic symbols. */ 481 bfd_size_type bucketcount; 482 483 /* A linked list of DT_NEEDED names found in dynamic objects 484 included in the link. */ 485 struct bfd_link_needed_list *needed; 486 487 /* Sections in the output bfd that provides a section symbol 488 to be used by relocations emitted against local symbols. 489 Most targets will not use data_index_section. */ 490 asection *text_index_section; 491 asection *data_index_section; 492 493 /* The _GLOBAL_OFFSET_TABLE_ symbol. */ 494 struct elf_link_hash_entry *hgot; 495 496 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */ 497 struct elf_link_hash_entry *hplt; 498 499 /* A pointer to information used to merge SEC_MERGE sections. */ 500 void *merge_info; 501 502 /* Used to link stabs in sections. */ 503 struct stab_info stab_info; 504 505 /* Used by eh_frame code when editing .eh_frame. */ 506 struct eh_frame_hdr_info eh_info; 507 508 /* A linked list of local symbols to be added to .dynsym. */ 509 struct elf_link_local_dynamic_entry *dynlocal; 510 511 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic 512 objects included in the link. */ 513 struct bfd_link_needed_list *runpath; 514 515 /* Cached first output tls section and size of PT_TLS segment. */ 516 asection *tls_sec; 517 bfd_size_type tls_size; 518 519 /* A linked list of BFD's loaded in the link. */ 520 struct elf_link_loaded_list *loaded; 521 522 /* Short-cuts to get to dynamic linker sections. */ 523 asection *sgot; 524 asection *sgotplt; 525 asection *srelgot; 526 asection *splt; 527 asection *srelplt; 528 asection *igotplt; 529 asection *iplt; 530 asection *irelplt; 531 asection *irelifunc; 532 }; 533 534 /* Look up an entry in an ELF linker hash table. */ 535 536 #define elf_link_hash_lookup(table, string, create, copy, follow) \ 537 ((struct elf_link_hash_entry *) \ 538 bfd_link_hash_lookup (&(table)->root, (string), (create), \ 539 (copy), (follow))) 540 541 /* Traverse an ELF linker hash table. */ 542 543 #define elf_link_hash_traverse(table, func, info) \ 544 (bfd_link_hash_traverse \ 545 (&(table)->root, \ 546 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 547 (info))) 548 549 /* Get the ELF linker hash table from a link_info structure. */ 550 551 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) 552 553 #define elf_hash_table_id(table) ((table) -> hash_table_id) 554 555 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */ 556 #define is_elf_hash_table(htab) \ 557 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) 558 559 /* Used by bfd_sym_from_r_symndx to cache a small number of local 560 symbols. */ 561 #define LOCAL_SYM_CACHE_SIZE 32 562 struct sym_cache 563 { 564 bfd *abfd; 565 unsigned long indx[LOCAL_SYM_CACHE_SIZE]; 566 Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE]; 567 }; 568 569 /* Constant information held for an ELF backend. */ 570 571 struct elf_size_info { 572 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; 573 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; 574 575 /* The size of entries in the .hash section. */ 576 unsigned char sizeof_hash_entry; 577 578 /* The number of internal relocations to allocate per external 579 relocation entry. */ 580 unsigned char int_rels_per_ext_rel; 581 /* We use some fixed size arrays. This should be large enough to 582 handle all back-ends. */ 583 #define MAX_INT_RELS_PER_EXT_REL 3 584 585 unsigned char arch_size, log_file_align; 586 unsigned char elfclass, ev_current; 587 int (*write_out_phdrs) 588 (bfd *, const Elf_Internal_Phdr *, unsigned int); 589 bfd_boolean 590 (*write_shdrs_and_ehdr) (bfd *); 591 bfd_boolean (*checksum_contents) 592 (bfd * , void (*) (const void *, size_t, void *), void *); 593 void (*write_relocs) 594 (bfd *, asection *, void *); 595 bfd_boolean (*swap_symbol_in) 596 (bfd *, const void *, const void *, Elf_Internal_Sym *); 597 void (*swap_symbol_out) 598 (bfd *, const Elf_Internal_Sym *, void *, void *); 599 bfd_boolean (*slurp_reloc_table) 600 (bfd *, asection *, asymbol **, bfd_boolean); 601 long (*slurp_symbol_table) 602 (bfd *, asymbol **, bfd_boolean); 603 void (*swap_dyn_in) 604 (bfd *, const void *, Elf_Internal_Dyn *); 605 void (*swap_dyn_out) 606 (bfd *, const Elf_Internal_Dyn *, void *); 607 608 /* This function is called to swap in a REL relocation. If an 609 external relocation corresponds to more than one internal 610 relocation, then all relocations are swapped in at once. */ 611 void (*swap_reloc_in) 612 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 613 614 /* This function is called to swap out a REL relocation. */ 615 void (*swap_reloc_out) 616 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 617 618 /* This function is called to swap in a RELA relocation. If an 619 external relocation corresponds to more than one internal 620 relocation, then all relocations are swapped in at once. */ 621 void (*swap_reloca_in) 622 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 623 624 /* This function is called to swap out a RELA relocation. */ 625 void (*swap_reloca_out) 626 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 627 }; 628 629 #define elf_symbol_from(ABFD,S) \ 630 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ 631 && (S)->the_bfd->tdata.elf_obj_data != 0) \ 632 ? (elf_symbol_type *) (S) \ 633 : 0) 634 635 enum elf_reloc_type_class { 636 reloc_class_normal, 637 reloc_class_relative, 638 reloc_class_plt, 639 reloc_class_copy 640 }; 641 642 struct elf_reloc_cookie 643 { 644 Elf_Internal_Rela *rels, *rel, *relend; 645 Elf_Internal_Sym *locsyms; 646 bfd *abfd; 647 size_t locsymcount; 648 size_t extsymoff; 649 struct elf_link_hash_entry **sym_hashes; 650 int r_sym_shift; 651 bfd_boolean bad_symtab; 652 }; 653 654 /* The level of IRIX compatibility we're striving for. */ 655 656 typedef enum { 657 ict_none, 658 ict_irix5, 659 ict_irix6 660 } irix_compat_t; 661 662 /* Mapping of ELF section names and types. */ 663 struct bfd_elf_special_section 664 { 665 const char *prefix; 666 int prefix_length; 667 /* 0 means name must match PREFIX exactly. 668 -1 means name must start with PREFIX followed by an arbitrary string. 669 -2 means name must match PREFIX exactly or consist of PREFIX followed 670 by a dot then anything. 671 > 0 means name must start with the first PREFIX_LENGTH chars of 672 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ 673 int suffix_length; 674 int type; 675 bfd_vma attr; 676 }; 677 678 enum action_discarded 679 { 680 COMPLAIN = 1, 681 PRETEND = 2 682 }; 683 684 typedef asection * (*elf_gc_mark_hook_fn) 685 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 686 struct elf_link_hash_entry *, Elf_Internal_Sym *); 687 688 struct elf_backend_data 689 { 690 /* The architecture for this backend. */ 691 enum bfd_architecture arch; 692 693 /* An identifier used to distinguish different target specific 694 extensions to elf_obj_tdata and elf_link_hash_table structures. */ 695 enum elf_target_id target_id; 696 697 /* The ELF machine code (EM_xxxx) for this backend. */ 698 int elf_machine_code; 699 700 /* EI_OSABI. */ 701 int elf_osabi; 702 703 /* The maximum page size for this backend. */ 704 bfd_vma maxpagesize; 705 706 /* The minimum page size for this backend. An input object will not be 707 considered page aligned unless its sections are correctly aligned for 708 pages at least this large. May be smaller than maxpagesize. */ 709 bfd_vma minpagesize; 710 711 /* The common page size for this backend. */ 712 bfd_vma commonpagesize; 713 714 /* The BFD flags applied to sections created for dynamic linking. */ 715 flagword dynamic_sec_flags; 716 717 /* Architecture-specific data for this backend. 718 This is actually a pointer to some type like struct elf_ARCH_data. */ 719 const void *arch_data; 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, if defined, is called to convert target-specific 1120 section flag names into hex values. */ 1121 flagword (*elf_backend_lookup_section_flags_hook) 1122 (char *); 1123 1124 /* This function returns class of a reloc type. */ 1125 enum elf_reloc_type_class (*elf_backend_reloc_type_class) 1126 (const Elf_Internal_Rela *); 1127 1128 /* This function, if defined, removes information about discarded functions 1129 from other sections which mention them. */ 1130 bfd_boolean (*elf_backend_discard_info) 1131 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 1132 1133 /* This function, if defined, signals that the function above has removed 1134 the discarded relocations for this section. */ 1135 bfd_boolean (*elf_backend_ignore_discarded_relocs) 1136 (asection *); 1137 1138 /* What to do when ld finds relocations against symbols defined in 1139 discarded sections. */ 1140 unsigned int (*action_discarded) 1141 (asection *); 1142 1143 /* This function returns the width of FDE pointers in bytes, or 0 if 1144 that can't be determined for some reason. The default definition 1145 goes by the bfd's EI_CLASS. */ 1146 unsigned int (*elf_backend_eh_frame_address_size) 1147 (bfd *, asection *); 1148 1149 /* These functions tell elf-eh-frame whether to attempt to turn 1150 absolute or lsda encodings into pc-relative ones. The default 1151 definition enables these transformations. */ 1152 bfd_boolean (*elf_backend_can_make_relative_eh_frame) 1153 (bfd *, struct bfd_link_info *, asection *); 1154 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) 1155 (bfd *, struct bfd_link_info *, asection *); 1156 1157 /* This function returns an encoding after computing the encoded 1158 value (and storing it in ENCODED) for the given OFFSET into OSEC, 1159 to be stored in at LOC_OFFSET into the LOC_SEC input section. 1160 The default definition chooses a 32-bit PC-relative encoding. */ 1161 bfd_byte (*elf_backend_encode_eh_address) 1162 (bfd *abfd, struct bfd_link_info *info, 1163 asection *osec, bfd_vma offset, 1164 asection *loc_sec, bfd_vma loc_offset, 1165 bfd_vma *encoded); 1166 1167 /* This function, if defined, may write out the given section. 1168 Returns TRUE if it did so and FALSE if the caller should. */ 1169 bfd_boolean (*elf_backend_write_section) 1170 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1171 1172 /* The level of IRIX compatibility we're striving for. 1173 MIPS ELF specific function. */ 1174 irix_compat_t (*elf_backend_mips_irix_compat) 1175 (bfd *); 1176 1177 reloc_howto_type *(*elf_backend_mips_rtype_to_howto) 1178 (unsigned int, bfd_boolean); 1179 1180 /* The swapping table to use when dealing with ECOFF information. 1181 Used for the MIPS ELF .mdebug section. */ 1182 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; 1183 1184 /* This function implements `bfd_elf_bfd_from_remote_memory'; 1185 see elf.c, elfcode.h. */ 1186 bfd *(*elf_backend_bfd_from_remote_memory) 1187 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1188 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len)); 1189 1190 /* This function is used by `_bfd_elf_get_synthetic_symtab'; 1191 see elf.c. */ 1192 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); 1193 1194 /* Is symbol defined in common section? */ 1195 bfd_boolean (*common_definition) (Elf_Internal_Sym *); 1196 1197 /* Return a common section index for section. */ 1198 unsigned int (*common_section_index) (asection *); 1199 1200 /* Return a common section for section. */ 1201 asection *(*common_section) (asection *); 1202 1203 /* Return TRUE if we can merge 2 definitions. */ 1204 bfd_boolean (*merge_symbol) (struct bfd_link_info *, 1205 struct elf_link_hash_entry **, 1206 struct elf_link_hash_entry *, 1207 Elf_Internal_Sym *, asection **, 1208 bfd_vma *, unsigned int *, 1209 bfd_boolean *, bfd_boolean *, 1210 bfd_boolean *, bfd_boolean *, 1211 bfd_boolean *, bfd_boolean *, 1212 bfd_boolean *, bfd_boolean *, 1213 bfd *, asection **, 1214 bfd_boolean *, bfd_boolean *, 1215 bfd_boolean *, bfd_boolean *, 1216 bfd *, asection **); 1217 1218 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 1219 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *); 1220 1221 /* Return TRUE if type is a function symbol type. */ 1222 bfd_boolean (*is_function_type) (unsigned int type); 1223 1224 /* Used to handle bad SHF_LINK_ORDER input. */ 1225 bfd_error_handler_type link_order_error_handler; 1226 1227 /* Name of the PLT relocation section. */ 1228 const char *relplt_name; 1229 1230 /* Alternate EM_xxxx machine codes for this backend. */ 1231 int elf_machine_alt1; 1232 int elf_machine_alt2; 1233 1234 const struct elf_size_info *s; 1235 1236 /* An array of target specific special sections. */ 1237 const struct bfd_elf_special_section *special_sections; 1238 1239 /* The size in bytes of the header for the GOT. This includes the 1240 so-called reserved entries on some systems. */ 1241 bfd_vma got_header_size; 1242 1243 /* The size of the GOT entry for the symbol pointed to by H if non-NULL, 1244 otherwise by the local symbol with index SYMNDX in IBFD. */ 1245 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *, 1246 struct elf_link_hash_entry *h, 1247 bfd *ibfd, unsigned long symndx); 1248 1249 /* The vendor name to use for a processor-standard attributes section. */ 1250 const char *obj_attrs_vendor; 1251 1252 /* The section name to use for a processor-standard attributes section. */ 1253 const char *obj_attrs_section; 1254 1255 /* Return 1, 2 or 3 to indicate what type of arguments a 1256 processor-specific tag takes. */ 1257 int (*obj_attrs_arg_type) (int); 1258 1259 /* The section type to use for an attributes section. */ 1260 unsigned int obj_attrs_section_type; 1261 1262 /* This function determines the order in which any attributes are 1263 written. It must be defined for input in the range 1264 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range 1265 is used in order to make unity easy). The returned value is the 1266 actual tag number to place in the input position. */ 1267 int (*obj_attrs_order) (int); 1268 1269 /* Handle merging unknown attributes; either warn and return TRUE, 1270 or give an error and return FALSE. */ 1271 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int); 1272 1273 /* This is non-zero if static TLS segments require a special alignment. */ 1274 unsigned static_tls_alignment; 1275 1276 /* This is TRUE if the linker should act like collect and gather 1277 global constructors and destructors by name. This is TRUE for 1278 MIPS ELF because the Irix 5 tools can not handle the .init 1279 section. */ 1280 unsigned collect : 1; 1281 1282 /* This is TRUE if the linker should ignore changes to the type of a 1283 symbol. This is TRUE for MIPS ELF because some Irix 5 objects 1284 record undefined functions as STT_OBJECT although the definitions 1285 are STT_FUNC. */ 1286 unsigned type_change_ok : 1; 1287 1288 /* Whether the backend may use REL relocations. (Some backends use 1289 both REL and RELA relocations, and this flag is set for those 1290 backends.) */ 1291 unsigned may_use_rel_p : 1; 1292 1293 /* Whether the backend may use RELA relocations. (Some backends use 1294 both REL and RELA relocations, and this flag is set for those 1295 backends.) */ 1296 unsigned may_use_rela_p : 1; 1297 1298 /* Whether the default relocation type is RELA. If a backend with 1299 this flag set wants REL relocations for a particular section, 1300 it must note that explicitly. Similarly, if this flag is clear, 1301 and the backend wants RELA relocations for a particular 1302 section. */ 1303 unsigned default_use_rela_p : 1; 1304 1305 /* True if PLT and copy relocations should be RELA by default. */ 1306 unsigned rela_plts_and_copies_p : 1; 1307 1308 /* Set if RELA relocations for a relocatable link can be handled by 1309 generic code. Backends that set this flag need do nothing in the 1310 backend relocate_section routine for relocatable linking. */ 1311 unsigned rela_normal : 1; 1312 1313 /* TRUE if addresses "naturally" sign extend. This is used when 1314 swapping in from Elf32 when BFD64. */ 1315 unsigned sign_extend_vma : 1; 1316 1317 unsigned want_got_plt : 1; 1318 unsigned plt_readonly : 1; 1319 unsigned want_plt_sym : 1; 1320 unsigned plt_not_loaded : 1; 1321 unsigned plt_alignment : 4; 1322 unsigned can_gc_sections : 1; 1323 unsigned can_refcount : 1; 1324 unsigned want_got_sym : 1; 1325 unsigned want_dynbss : 1; 1326 1327 /* Targets which do not support physical addressing often require 1328 that the p_paddr field in the section header to be set to zero. 1329 This field indicates whether this behavior is required. */ 1330 unsigned want_p_paddr_set_to_zero : 1; 1331 1332 /* True if an object file lacking a .note.GNU-stack section 1333 should be assumed to be requesting exec stack. At least one 1334 other file in the link needs to have a .note.GNU-stack section 1335 for a PT_GNU_STACK segment to be created. */ 1336 unsigned default_execstack : 1; 1337 }; 1338 1339 /* Information about reloc sections associated with a bfd_elf_section_data 1340 structure. */ 1341 struct bfd_elf_section_reloc_data 1342 { 1343 /* The ELF header for the reloc section associated with this 1344 section, if any. */ 1345 Elf_Internal_Shdr *hdr; 1346 /* The number of relocations currently assigned to HDR. */ 1347 unsigned int count; 1348 /* The ELF section number of the reloc section. Only used for an 1349 output file. */ 1350 int idx; 1351 /* Used by the backend linker to store the symbol hash table entries 1352 associated with relocs against global symbols. */ 1353 struct elf_link_hash_entry **hashes; 1354 }; 1355 1356 /* Information stored for each BFD section in an ELF file. This 1357 structure is allocated by elf_new_section_hook. */ 1358 1359 struct bfd_elf_section_data 1360 { 1361 /* The ELF header for this section. */ 1362 Elf_Internal_Shdr this_hdr; 1363 1364 /* Information about the REL and RELA reloc sections associated 1365 with this section, if any. */ 1366 struct bfd_elf_section_reloc_data rel, rela; 1367 1368 /* The ELF section number of this section. */ 1369 int this_idx; 1370 1371 /* Used by the backend linker when generating a shared library to 1372 record the dynamic symbol index for a section symbol 1373 corresponding to this section. A value of 0 means that there is 1374 no dynamic symbol for this section. */ 1375 int dynindx; 1376 1377 /* A pointer to the linked-to section for SHF_LINK_ORDER. */ 1378 asection *linked_to; 1379 1380 /* A pointer to the swapped relocs. If the section uses REL relocs, 1381 rather than RELA, all the r_addend fields will be zero. This 1382 pointer may be NULL. It is used by the backend linker. */ 1383 Elf_Internal_Rela *relocs; 1384 1385 /* A pointer to a linked list tracking dynamic relocs copied for 1386 local symbols. */ 1387 void *local_dynrel; 1388 1389 /* A pointer to the bfd section used for dynamic relocs. */ 1390 asection *sreloc; 1391 1392 union { 1393 /* Group name, if this section is a member of a group. */ 1394 const char *name; 1395 1396 /* Group signature sym, if this is the SHT_GROUP section. */ 1397 struct bfd_symbol *id; 1398 } group; 1399 1400 /* For a member of a group, points to the SHT_GROUP section. 1401 NULL for the SHT_GROUP section itself and non-group sections. */ 1402 asection *sec_group; 1403 1404 /* A linked list of member sections in the group. Circular when used by 1405 the linker. For the SHT_GROUP section, points at first member. */ 1406 asection *next_in_group; 1407 1408 /* The FDEs associated with this section. The u.fde.next_in_section 1409 field acts as a chain pointer. */ 1410 struct eh_cie_fde *fde_list; 1411 1412 /* A pointer used for various section optimizations. */ 1413 void *sec_info; 1414 }; 1415 1416 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) 1417 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) 1418 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) 1419 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) 1420 #define elf_group_name(sec) (elf_section_data(sec)->group.name) 1421 #define elf_group_id(sec) (elf_section_data(sec)->group.id) 1422 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) 1423 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list) 1424 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group) 1425 1426 #define xvec_get_elf_backend_data(xvec) \ 1427 ((const struct elf_backend_data *) (xvec)->backend_data) 1428 1429 #define get_elf_backend_data(abfd) \ 1430 xvec_get_elf_backend_data ((abfd)->xvec) 1431 1432 /* The least object attributes (within an attributes subsection) known 1433 for any target. Some code assumes that the value 0 is not used and 1434 the field for that attribute can instead be used as a marker to 1435 indicate that attributes have been initialized. */ 1436 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2 1437 1438 /* The maximum number of known object attributes for any target. */ 1439 #define NUM_KNOWN_OBJ_ATTRIBUTES 71 1440 1441 /* The value of an object attribute. The type indicates whether the attribute 1442 holds and integer, a string, or both. It can also indicate that there can 1443 be no default (i.e. all values must be written to file, even zero). */ 1444 1445 typedef struct obj_attribute 1446 { 1447 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0) 1448 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1) 1449 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2) 1450 1451 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL) 1452 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL) 1453 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT) 1454 1455 int type; 1456 unsigned int i; 1457 char *s; 1458 } obj_attribute; 1459 1460 typedef struct obj_attribute_list 1461 { 1462 struct obj_attribute_list *next; 1463 int tag; 1464 obj_attribute attr; 1465 } obj_attribute_list; 1466 1467 /* Object attributes may either be defined by the processor ABI, index 1468 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific 1469 (and possibly also processor-specific), index OBJ_ATTR_GNU. */ 1470 #define OBJ_ATTR_PROC 0 1471 #define OBJ_ATTR_GNU 1 1472 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC 1473 #define OBJ_ATTR_LAST OBJ_ATTR_GNU 1474 1475 /* The following object attribute tags are taken as generic, for all 1476 targets and for "gnu" where there is no target standard. */ 1477 enum 1478 { 1479 Tag_NULL = 0, 1480 Tag_File = 1, 1481 Tag_Section = 2, 1482 Tag_Symbol = 3, 1483 Tag_compatibility = 32 1484 }; 1485 1486 /* The following struct stores information about every SystemTap section 1487 found in the object file. */ 1488 struct sdt_note 1489 { 1490 struct sdt_note *next; 1491 bfd_size_type size; 1492 bfd_byte data[1]; 1493 }; 1494 1495 /* Some private data is stashed away for future use using the tdata pointer 1496 in the bfd structure. */ 1497 1498 struct elf_obj_tdata 1499 { 1500 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ 1501 Elf_Internal_Shdr **elf_sect_ptr; 1502 Elf_Internal_Phdr *phdr; 1503 struct elf_segment_map *segment_map; 1504 struct elf_strtab_hash *strtab_ptr; 1505 int num_locals; 1506 int num_globals; 1507 unsigned int num_elf_sections; /* elf_sect_ptr size */ 1508 int num_section_syms; 1509 asymbol **section_syms; /* STT_SECTION symbols for each section */ 1510 Elf_Internal_Shdr symtab_hdr; 1511 Elf_Internal_Shdr shstrtab_hdr; 1512 Elf_Internal_Shdr strtab_hdr; 1513 Elf_Internal_Shdr dynsymtab_hdr; 1514 Elf_Internal_Shdr dynstrtab_hdr; 1515 Elf_Internal_Shdr dynversym_hdr; 1516 Elf_Internal_Shdr dynverref_hdr; 1517 Elf_Internal_Shdr dynverdef_hdr; 1518 Elf_Internal_Shdr symtab_shndx_hdr; 1519 unsigned int symtab_section, shstrtab_section; 1520 unsigned int strtab_section, dynsymtab_section; 1521 unsigned int symtab_shndx_section; 1522 unsigned int dynversym_section, dynverdef_section, dynverref_section; 1523 file_ptr next_file_pos; 1524 bfd_vma gp; /* The gp value */ 1525 unsigned int gp_size; /* The gp size */ 1526 1527 /* Information grabbed from an elf core file. */ 1528 int core_signal; 1529 int core_pid; 1530 int core_lwpid; 1531 char* core_program; 1532 char* core_command; 1533 1534 /* A mapping from external symbols to entries in the linker hash 1535 table, used when linking. This is indexed by the symbol index 1536 minus the sh_info field of the symbol table header. */ 1537 struct elf_link_hash_entry **sym_hashes; 1538 1539 /* Track usage and final offsets of GOT entries for local symbols. 1540 This array is indexed by symbol index. Elements are used 1541 identically to "got" in struct elf_link_hash_entry. */ 1542 union 1543 { 1544 bfd_signed_vma *refcounts; 1545 bfd_vma *offsets; 1546 struct got_entry **ents; 1547 } local_got; 1548 1549 /* The linker ELF emulation code needs to let the backend ELF linker 1550 know what filename should be used for a dynamic object if the 1551 dynamic object is found using a search. The emulation code then 1552 sometimes needs to know what name was actually used. Until the 1553 file has been added to the linker symbol table, this field holds 1554 the name the linker wants. After it has been added, it holds the 1555 name actually used, which will be the DT_SONAME entry if there is 1556 one. */ 1557 const char *dt_name; 1558 1559 /* The linker emulation needs to know what audit libs 1560 are used by a dynamic object. */ 1561 const char *dt_audit; 1562 1563 /* Records the result of `get_program_header_size'. */ 1564 bfd_size_type program_header_size; 1565 1566 /* Used by find_nearest_line entry point. */ 1567 void *line_info; 1568 1569 /* Used by MIPS ELF find_nearest_line entry point. The structure 1570 could be included directly in this one, but there's no point to 1571 wasting the memory just for the infrequently called 1572 find_nearest_line. */ 1573 struct mips_elf_find_line *find_line_info; 1574 1575 /* A place to stash dwarf1 info for this bfd. */ 1576 struct dwarf1_debug *dwarf1_find_line_info; 1577 1578 /* A place to stash dwarf2 info for this bfd. */ 1579 void *dwarf2_find_line_info; 1580 1581 /* An array of stub sections indexed by symbol number, used by the 1582 MIPS ELF linker. FIXME: We should figure out some way to only 1583 include this field for a MIPS ELF target. */ 1584 asection **local_stubs; 1585 asection **local_call_stubs; 1586 1587 /* Used to determine if PT_GNU_EH_FRAME segment header should be 1588 created. */ 1589 asection *eh_frame_hdr; 1590 1591 Elf_Internal_Shdr **group_sect_ptr; 1592 int num_group; 1593 1594 /* Number of symbol version definitions we are about to emit. */ 1595 unsigned int cverdefs; 1596 1597 /* Number of symbol version references we are about to emit. */ 1598 unsigned int cverrefs; 1599 1600 /* Segment flags for the PT_GNU_STACK segment. */ 1601 unsigned int stack_flags; 1602 1603 /* Symbol version definitions in external objects. */ 1604 Elf_Internal_Verdef *verdef; 1605 1606 /* Symbol version references to external objects. */ 1607 Elf_Internal_Verneed *verref; 1608 1609 /* The Irix 5 support uses two virtual sections, which represent 1610 text/data symbols defined in dynamic objects. */ 1611 asymbol *elf_data_symbol; 1612 asymbol *elf_text_symbol; 1613 asection *elf_data_section; 1614 asection *elf_text_section; 1615 1616 /* A pointer to the .eh_frame section. */ 1617 asection *eh_frame_section; 1618 1619 /* Whether a dyanmic object was specified normally on the linker 1620 command line, or was specified when --as-needed was in effect, 1621 or was found via a DT_NEEDED entry. */ 1622 enum dynamic_lib_link_class dyn_lib_class; 1623 1624 /* This is set to TRUE if the object was created by the backend 1625 linker. */ 1626 bfd_boolean linker; 1627 1628 /* Irix 5 often screws up the symbol table, sorting local symbols 1629 after global symbols. This flag is set if the symbol table in 1630 this BFD appears to be screwed up. If it is, we ignore the 1631 sh_info field in the symbol table header, and always read all the 1632 symbols. */ 1633 bfd_boolean bad_symtab; 1634 1635 /* Used to determine if the e_flags field has been initialized */ 1636 bfd_boolean flags_init; 1637 1638 /* Symbol buffer. */ 1639 void *symbuf; 1640 1641 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES]; 1642 obj_attribute_list *other_obj_attributes[2]; 1643 1644 /* Called at the end of _bfd_elf_write_object_contents if not NULL. */ 1645 bfd_boolean (*after_write_object_contents) (bfd *); 1646 void *after_write_object_contents_info; 1647 1648 /* NT_GNU_BUILD_ID note type. */ 1649 bfd_size_type build_id_size; 1650 bfd_byte *build_id; 1651 1652 /* Linked-list containing information about every Systemtap section 1653 found in the object file. Each section corresponds to one entry 1654 in the list. */ 1655 struct sdt_note *sdt_note_head; 1656 1657 /* True if the bfd contains symbols that have the STT_GNU_IFUNC 1658 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi 1659 field in the ELF header structure. */ 1660 bfd_boolean has_gnu_symbols; 1661 1662 /* An identifier used to distinguish different target 1663 specific extensions to this structure. */ 1664 enum elf_target_id object_id; 1665 }; 1666 1667 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) 1668 1669 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id) 1670 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size) 1671 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) 1672 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) 1673 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) 1674 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) 1675 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) 1676 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) 1677 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr) 1678 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) 1679 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section) 1680 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section) 1681 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section) 1682 #define elf_eh_frame_section(bfd) \ 1683 (elf_tdata(bfd) -> eh_frame_section) 1684 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals) 1685 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) 1686 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) 1687 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms) 1688 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) 1689 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) 1690 #define elf_gp(bfd) (elf_tdata(bfd) -> gp) 1691 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) 1692 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) 1693 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) 1694 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) 1695 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) 1696 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) 1697 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit) 1698 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) 1699 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) 1700 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init) 1701 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes) 1702 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes) 1703 #define elf_known_obj_attributes_proc(bfd) \ 1704 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1705 #define elf_other_obj_attributes_proc(bfd) \ 1706 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1707 1708 extern void _bfd_elf_swap_verdef_in 1709 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); 1710 extern void _bfd_elf_swap_verdef_out 1711 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); 1712 extern void _bfd_elf_swap_verdaux_in 1713 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); 1714 extern void _bfd_elf_swap_verdaux_out 1715 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); 1716 extern void _bfd_elf_swap_verneed_in 1717 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); 1718 extern void _bfd_elf_swap_verneed_out 1719 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); 1720 extern void _bfd_elf_swap_vernaux_in 1721 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); 1722 extern void _bfd_elf_swap_vernaux_out 1723 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); 1724 extern void _bfd_elf_swap_versym_in 1725 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); 1726 extern void _bfd_elf_swap_versym_out 1727 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); 1728 1729 extern unsigned int _bfd_elf_section_from_bfd_section 1730 (bfd *, asection *); 1731 extern char *bfd_elf_string_from_elf_section 1732 (bfd *, unsigned, unsigned); 1733 extern Elf_Internal_Sym *bfd_elf_get_elf_syms 1734 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, 1735 Elf_External_Sym_Shndx *); 1736 extern const char *bfd_elf_sym_name 1737 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); 1738 1739 extern bfd_boolean _bfd_elf_copy_private_bfd_data 1740 (bfd *, bfd *); 1741 extern bfd_boolean _bfd_elf_print_private_bfd_data 1742 (bfd *, void *); 1743 extern void bfd_elf_print_symbol 1744 (bfd *, void *, asymbol *, bfd_print_symbol_type); 1745 1746 extern unsigned int _bfd_elf_eh_frame_address_size 1747 (bfd *, asection *); 1748 extern bfd_byte _bfd_elf_encode_eh_address 1749 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, 1750 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); 1751 extern bfd_boolean _bfd_elf_can_make_relative 1752 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); 1753 1754 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class 1755 (const Elf_Internal_Rela *); 1756 extern bfd_vma _bfd_elf_rela_local_sym 1757 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); 1758 extern bfd_vma _bfd_elf_rel_local_sym 1759 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); 1760 extern bfd_vma _bfd_elf_section_offset 1761 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1762 1763 extern unsigned long bfd_elf_hash 1764 (const char *); 1765 extern unsigned long bfd_elf_gnu_hash 1766 (const char *); 1767 1768 extern bfd_reloc_status_type bfd_elf_generic_reloc 1769 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 1770 extern bfd_boolean bfd_elf_allocate_object 1771 (bfd *, size_t, enum elf_target_id); 1772 extern bfd_boolean bfd_elf_make_object 1773 (bfd *); 1774 extern bfd_boolean bfd_elf_mkcorefile 1775 (bfd *); 1776 extern bfd_boolean _bfd_elf_make_section_from_shdr 1777 (bfd *, Elf_Internal_Shdr *, const char *, int); 1778 extern bfd_boolean _bfd_elf_make_section_from_phdr 1779 (bfd *, Elf_Internal_Phdr *, int, const char *); 1780 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc 1781 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 1782 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create 1783 (bfd *); 1784 extern void _bfd_elf_link_hash_copy_indirect 1785 (struct bfd_link_info *, struct elf_link_hash_entry *, 1786 struct elf_link_hash_entry *); 1787 extern void _bfd_elf_link_hash_hide_symbol 1788 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1789 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol 1790 (struct bfd_link_info *, struct elf_link_hash_entry *); 1791 extern bfd_boolean _bfd_elf_link_hash_table_init 1792 (struct elf_link_hash_table *, bfd *, 1793 struct bfd_hash_entry *(*) 1794 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *), 1795 unsigned int, enum elf_target_id); 1796 extern bfd_boolean _bfd_elf_slurp_version_tables 1797 (bfd *, bfd_boolean); 1798 extern bfd_boolean _bfd_elf_merge_sections 1799 (bfd *, struct bfd_link_info *); 1800 extern bfd_boolean _bfd_elf_match_sections_by_type 1801 (bfd *, const asection *, bfd *, const asection *); 1802 extern bfd_boolean bfd_elf_is_group_section 1803 (bfd *, const struct bfd_section *); 1804 extern bfd_boolean _bfd_elf_section_already_linked 1805 (bfd *, asection *, struct bfd_link_info *); 1806 extern void bfd_elf_set_group_contents 1807 (bfd *, asection *, void *); 1808 extern asection *_bfd_elf_check_kept_section 1809 (asection *, struct bfd_link_info *); 1810 extern void _bfd_elf_link_just_syms 1811 (asection *, struct bfd_link_info *); 1812 extern void _bfd_elf_copy_link_hash_symbol_type 1813 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *); 1814 extern bfd_boolean _bfd_elf_size_group_sections 1815 (struct bfd_link_info *); 1816 extern bfd_boolean _bfd_elf_fixup_group_sections 1817 (bfd *, asection *); 1818 extern bfd_boolean _bfd_elf_copy_private_header_data 1819 (bfd *, bfd *); 1820 extern bfd_boolean _bfd_elf_copy_private_symbol_data 1821 (bfd *, asymbol *, bfd *, asymbol *); 1822 #define _bfd_generic_init_private_section_data \ 1823 _bfd_elf_init_private_section_data 1824 extern bfd_boolean _bfd_elf_init_private_section_data 1825 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); 1826 extern bfd_boolean _bfd_elf_copy_private_section_data 1827 (bfd *, asection *, bfd *, asection *); 1828 extern bfd_boolean _bfd_elf_write_object_contents 1829 (bfd *); 1830 extern bfd_boolean _bfd_elf_write_corefile_contents 1831 (bfd *); 1832 extern bfd_boolean _bfd_elf_set_section_contents 1833 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 1834 extern long _bfd_elf_get_symtab_upper_bound 1835 (bfd *); 1836 extern long _bfd_elf_canonicalize_symtab 1837 (bfd *, asymbol **); 1838 extern long _bfd_elf_get_dynamic_symtab_upper_bound 1839 (bfd *); 1840 extern long _bfd_elf_canonicalize_dynamic_symtab 1841 (bfd *, asymbol **); 1842 extern long _bfd_elf_get_synthetic_symtab 1843 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 1844 extern long _bfd_elf_get_reloc_upper_bound 1845 (bfd *, sec_ptr); 1846 extern long _bfd_elf_canonicalize_reloc 1847 (bfd *, sec_ptr, arelent **, asymbol **); 1848 extern asection * _bfd_elf_get_dynamic_reloc_section 1849 (bfd *, asection *, bfd_boolean); 1850 extern asection * _bfd_elf_make_dynamic_reloc_section 1851 (asection *, bfd *, unsigned int, bfd *, bfd_boolean); 1852 extern long _bfd_elf_get_dynamic_reloc_upper_bound 1853 (bfd *); 1854 extern long _bfd_elf_canonicalize_dynamic_reloc 1855 (bfd *, arelent **, asymbol **); 1856 extern asymbol *_bfd_elf_make_empty_symbol 1857 (bfd *); 1858 extern void _bfd_elf_get_symbol_info 1859 (bfd *, asymbol *, symbol_info *); 1860 extern bfd_boolean _bfd_elf_is_local_label_name 1861 (bfd *, const char *); 1862 extern alent *_bfd_elf_get_lineno 1863 (bfd *, asymbol *); 1864 extern bfd_boolean _bfd_elf_set_arch_mach 1865 (bfd *, enum bfd_architecture, unsigned long); 1866 extern bfd_boolean _bfd_elf_find_nearest_line 1867 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1868 unsigned int *); 1869 extern bfd_boolean _bfd_elf_find_line 1870 (bfd *, asymbol **, asymbol *, const char **, unsigned int *); 1871 #define _bfd_generic_find_line _bfd_elf_find_line 1872 extern bfd_boolean _bfd_elf_find_inliner_info 1873 (bfd *, const char **, const char **, unsigned int *); 1874 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols 1875 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 1876 extern int _bfd_elf_sizeof_headers 1877 (bfd *, struct bfd_link_info *); 1878 extern bfd_boolean _bfd_elf_new_section_hook 1879 (bfd *, asection *); 1880 extern bfd_boolean _bfd_elf_init_reloc_shdr 1881 (bfd *, struct bfd_elf_section_reloc_data *, asection *, bfd_boolean); 1882 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section 1883 (const char *, const struct bfd_elf_special_section *, unsigned int); 1884 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr 1885 (bfd *, asection *); 1886 1887 /* If the target doesn't have reloc handling written yet: */ 1888 extern void _bfd_elf_no_info_to_howto 1889 (bfd *, arelent *, Elf_Internal_Rela *); 1890 1891 extern bfd_boolean bfd_section_from_shdr 1892 (bfd *, unsigned int shindex); 1893 extern bfd_boolean bfd_section_from_phdr 1894 (bfd *, Elf_Internal_Phdr *, int); 1895 1896 extern int _bfd_elf_symbol_from_bfd_symbol 1897 (bfd *, asymbol **); 1898 1899 extern Elf_Internal_Sym *bfd_sym_from_r_symndx 1900 (struct sym_cache *, bfd *, unsigned long); 1901 extern asection *bfd_section_from_elf_index 1902 (bfd *, unsigned int); 1903 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init 1904 (void); 1905 1906 extern struct elf_strtab_hash * _bfd_elf_strtab_init 1907 (void); 1908 extern void _bfd_elf_strtab_free 1909 (struct elf_strtab_hash *); 1910 extern bfd_size_type _bfd_elf_strtab_add 1911 (struct elf_strtab_hash *, const char *, bfd_boolean); 1912 extern void _bfd_elf_strtab_addref 1913 (struct elf_strtab_hash *, bfd_size_type); 1914 extern void _bfd_elf_strtab_delref 1915 (struct elf_strtab_hash *, bfd_size_type); 1916 extern void _bfd_elf_strtab_clear_all_refs 1917 (struct elf_strtab_hash *); 1918 extern bfd_size_type _bfd_elf_strtab_size 1919 (struct elf_strtab_hash *); 1920 extern bfd_size_type _bfd_elf_strtab_offset 1921 (struct elf_strtab_hash *, bfd_size_type); 1922 extern bfd_boolean _bfd_elf_strtab_emit 1923 (bfd *, struct elf_strtab_hash *); 1924 extern void _bfd_elf_strtab_finalize 1925 (struct elf_strtab_hash *); 1926 1927 extern void _bfd_elf_begin_eh_frame_parsing 1928 (struct bfd_link_info *info); 1929 extern void _bfd_elf_parse_eh_frame 1930 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *); 1931 extern void _bfd_elf_end_eh_frame_parsing 1932 (struct bfd_link_info *info); 1933 1934 extern bfd_boolean _bfd_elf_discard_section_eh_frame 1935 (bfd *, struct bfd_link_info *, asection *, 1936 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); 1937 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr 1938 (bfd *, struct bfd_link_info *); 1939 extern bfd_vma _bfd_elf_eh_frame_section_offset 1940 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1941 extern bfd_boolean _bfd_elf_write_section_eh_frame 1942 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1943 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr 1944 (bfd *, struct bfd_link_info *); 1945 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr 1946 (struct bfd_link_info *); 1947 1948 extern bfd_boolean _bfd_elf_merge_symbol 1949 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, 1950 asection **, bfd_vma *, unsigned int *, 1951 struct elf_link_hash_entry **, bfd_boolean *, 1952 bfd_boolean *, bfd_boolean *, bfd_boolean *); 1953 1954 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); 1955 1956 extern long _bfd_elf_link_lookup_local_dynindx 1957 (struct bfd_link_info *, bfd *, long); 1958 extern bfd_boolean _bfd_elf_compute_section_file_positions 1959 (bfd *, struct bfd_link_info *); 1960 extern void _bfd_elf_assign_file_positions_for_relocs 1961 (bfd *); 1962 extern file_ptr _bfd_elf_assign_file_position_for_section 1963 (Elf_Internal_Shdr *, file_ptr, bfd_boolean); 1964 1965 extern bfd_boolean _bfd_elf_validate_reloc 1966 (bfd *, arelent *); 1967 1968 extern bfd_boolean _bfd_elf_link_create_dynamic_sections 1969 (bfd *, struct bfd_link_info *); 1970 extern bfd_boolean _bfd_elf_link_omit_section_dynsym 1971 (bfd *, struct bfd_link_info *, asection *); 1972 extern bfd_boolean _bfd_elf_create_dynamic_sections 1973 (bfd *, struct bfd_link_info *); 1974 extern bfd_boolean _bfd_elf_create_got_section 1975 (bfd *, struct bfd_link_info *); 1976 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym 1977 (bfd *, struct bfd_link_info *, asection *, const char *); 1978 extern void _bfd_elf_init_1_index_section 1979 (bfd *, struct bfd_link_info *); 1980 extern void _bfd_elf_init_2_index_sections 1981 (bfd *, struct bfd_link_info *); 1982 1983 extern bfd_boolean _bfd_elfcore_make_pseudosection 1984 (bfd *, char *, size_t, ufile_ptr); 1985 extern char *_bfd_elfcore_strndup 1986 (bfd *, char *, size_t); 1987 1988 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs 1989 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); 1990 1991 extern bfd_boolean _bfd_elf_link_output_relocs 1992 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1993 struct elf_link_hash_entry **); 1994 1995 extern bfd_boolean _bfd_elf_adjust_dynamic_copy 1996 (struct elf_link_hash_entry *, asection *); 1997 1998 extern bfd_boolean _bfd_elf_dynamic_symbol_p 1999 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 2000 2001 extern bfd_boolean _bfd_elf_symbol_refs_local_p 2002 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 2003 2004 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation 2005 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma); 2006 2007 extern bfd_boolean _bfd_elf_setup_sections 2008 (bfd *); 2009 2010 extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *); 2011 2012 extern const bfd_target *bfd_elf32_object_p 2013 (bfd *); 2014 extern const bfd_target *bfd_elf32_core_file_p 2015 (bfd *); 2016 extern char *bfd_elf32_core_file_failing_command 2017 (bfd *); 2018 extern int bfd_elf32_core_file_failing_signal 2019 (bfd *); 2020 extern bfd_boolean bfd_elf32_core_file_matches_executable_p 2021 (bfd *, bfd *); 2022 extern int bfd_elf32_core_file_pid 2023 (bfd *); 2024 2025 extern bfd_boolean bfd_elf32_swap_symbol_in 2026 (bfd *, const void *, const void *, Elf_Internal_Sym *); 2027 extern void bfd_elf32_swap_symbol_out 2028 (bfd *, const Elf_Internal_Sym *, void *, void *); 2029 extern void bfd_elf32_swap_reloc_in 2030 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2031 extern void bfd_elf32_swap_reloc_out 2032 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2033 extern void bfd_elf32_swap_reloca_in 2034 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2035 extern void bfd_elf32_swap_reloca_out 2036 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2037 extern void bfd_elf32_swap_phdr_in 2038 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); 2039 extern void bfd_elf32_swap_phdr_out 2040 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); 2041 extern void bfd_elf32_swap_dyn_in 2042 (bfd *, const void *, Elf_Internal_Dyn *); 2043 extern void bfd_elf32_swap_dyn_out 2044 (bfd *, const Elf_Internal_Dyn *, void *); 2045 extern long bfd_elf32_slurp_symbol_table 2046 (bfd *, asymbol **, bfd_boolean); 2047 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr 2048 (bfd *); 2049 extern int bfd_elf32_write_out_phdrs 2050 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2051 extern bfd_boolean bfd_elf32_checksum_contents 2052 (bfd * , void (*) (const void *, size_t, void *), void *); 2053 extern void bfd_elf32_write_relocs 2054 (bfd *, asection *, void *); 2055 extern bfd_boolean bfd_elf32_slurp_reloc_table 2056 (bfd *, asection *, asymbol **, bfd_boolean); 2057 2058 extern const bfd_target *bfd_elf64_object_p 2059 (bfd *); 2060 extern const bfd_target *bfd_elf64_core_file_p 2061 (bfd *); 2062 extern char *bfd_elf64_core_file_failing_command 2063 (bfd *); 2064 extern int bfd_elf64_core_file_failing_signal 2065 (bfd *); 2066 extern bfd_boolean bfd_elf64_core_file_matches_executable_p 2067 (bfd *, bfd *); 2068 extern int bfd_elf64_core_file_pid 2069 (bfd *); 2070 2071 extern bfd_boolean bfd_elf64_swap_symbol_in 2072 (bfd *, const void *, const void *, Elf_Internal_Sym *); 2073 extern void bfd_elf64_swap_symbol_out 2074 (bfd *, const Elf_Internal_Sym *, void *, void *); 2075 extern void bfd_elf64_swap_reloc_in 2076 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2077 extern void bfd_elf64_swap_reloc_out 2078 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2079 extern void bfd_elf64_swap_reloca_in 2080 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2081 extern void bfd_elf64_swap_reloca_out 2082 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2083 extern void bfd_elf64_swap_phdr_in 2084 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); 2085 extern void bfd_elf64_swap_phdr_out 2086 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); 2087 extern void bfd_elf64_swap_dyn_in 2088 (bfd *, const void *, Elf_Internal_Dyn *); 2089 extern void bfd_elf64_swap_dyn_out 2090 (bfd *, const Elf_Internal_Dyn *, void *); 2091 extern long bfd_elf64_slurp_symbol_table 2092 (bfd *, asymbol **, bfd_boolean); 2093 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr 2094 (bfd *); 2095 extern int bfd_elf64_write_out_phdrs 2096 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2097 extern bfd_boolean bfd_elf64_checksum_contents 2098 (bfd * , void (*) (const void *, size_t, void *), void *); 2099 extern void bfd_elf64_write_relocs 2100 (bfd *, asection *, void *); 2101 extern bfd_boolean bfd_elf64_slurp_reloc_table 2102 (bfd *, asection *, asymbol **, bfd_boolean); 2103 2104 extern bfd_boolean _bfd_elf_default_relocs_compatible 2105 (const bfd_target *, const bfd_target *); 2106 2107 extern bfd_boolean _bfd_elf_relocs_compatible 2108 (const bfd_target *, const bfd_target *); 2109 2110 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup 2111 (bfd *, struct bfd_link_info *, const char *); 2112 extern bfd_boolean bfd_elf_link_add_symbols 2113 (bfd *, struct bfd_link_info *); 2114 extern bfd_boolean _bfd_elf_add_dynamic_entry 2115 (struct bfd_link_info *, bfd_vma, bfd_vma); 2116 2117 extern bfd_boolean bfd_elf_link_record_dynamic_symbol 2118 (struct bfd_link_info *, struct elf_link_hash_entry *); 2119 2120 extern int bfd_elf_link_record_local_dynamic_symbol 2121 (struct bfd_link_info *, bfd *, long); 2122 2123 extern bfd_boolean _bfd_elf_close_and_cleanup 2124 (bfd *); 2125 2126 extern bfd_boolean _bfd_elf_common_definition 2127 (Elf_Internal_Sym *); 2128 2129 extern unsigned int _bfd_elf_common_section_index 2130 (asection *); 2131 2132 extern asection *_bfd_elf_common_section 2133 (asection *); 2134 2135 extern void _bfd_dwarf2_cleanup_debug_info 2136 (bfd *); 2137 2138 extern bfd_vma _bfd_elf_default_got_elt_size 2139 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *, 2140 unsigned long); 2141 2142 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 2143 (bfd *, arelent *, struct bfd_symbol *, void *, 2144 asection *, bfd *, char **); 2145 2146 extern bfd_boolean bfd_elf_final_link 2147 (bfd *, struct bfd_link_info *); 2148 2149 extern void _bfd_elf_gc_keep 2150 (struct bfd_link_info *info); 2151 2152 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol 2153 (struct elf_link_hash_entry *h, void *inf); 2154 2155 extern bfd_boolean bfd_elf_gc_sections 2156 (bfd *, struct bfd_link_info *); 2157 2158 extern bfd_boolean bfd_elf_gc_record_vtinherit 2159 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2160 2161 extern bfd_boolean bfd_elf_gc_record_vtentry 2162 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2163 2164 extern asection *_bfd_elf_gc_mark_hook 2165 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 2166 struct elf_link_hash_entry *, Elf_Internal_Sym *); 2167 2168 extern asection *_bfd_elf_gc_mark_rsec 2169 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2170 struct elf_reloc_cookie *); 2171 2172 extern bfd_boolean _bfd_elf_gc_mark_reloc 2173 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2174 struct elf_reloc_cookie *); 2175 2176 extern bfd_boolean _bfd_elf_gc_mark_fdes 2177 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn, 2178 struct elf_reloc_cookie *); 2179 2180 extern bfd_boolean _bfd_elf_gc_mark 2181 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn); 2182 2183 extern bfd_boolean _bfd_elf_gc_mark_extra_sections 2184 (struct bfd_link_info *, elf_gc_mark_hook_fn); 2185 2186 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets 2187 (bfd *, struct bfd_link_info *); 2188 2189 extern bfd_boolean bfd_elf_gc_common_final_link 2190 (bfd *, struct bfd_link_info *); 2191 2192 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p 2193 (bfd_vma, void *); 2194 2195 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment 2196 (bfd *, asection *); 2197 2198 extern bfd_boolean _bfd_elf_map_sections_to_segments 2199 (bfd *, struct bfd_link_info *); 2200 2201 extern bfd_boolean _bfd_elf_is_function_type (unsigned int); 2202 2203 extern int bfd_elf_get_default_section_type (flagword); 2204 2205 extern void bfd_elf_lookup_section_flags 2206 (struct bfd_link_info *, struct flag_info *); 2207 2208 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section 2209 (bfd * abfd, asection * section); 2210 2211 /* Exported interface for writing elf corefile notes. */ 2212 extern char *elfcore_write_note 2213 (bfd *, char *, int *, const char *, int, const void *, int); 2214 extern char *elfcore_write_prpsinfo 2215 (bfd *, char *, int *, const char *, const char *); 2216 extern char *elfcore_write_prstatus 2217 (bfd *, char *, int *, long, int, const void *); 2218 extern char * elfcore_write_pstatus 2219 (bfd *, char *, int *, long, int, const void *); 2220 extern char *elfcore_write_prfpreg 2221 (bfd *, char *, int *, const void *, int); 2222 extern char *elfcore_write_prxfpreg 2223 (bfd *, char *, int *, const void *, int); 2224 extern char *elfcore_write_xstatereg 2225 (bfd *, char *, int *, const void *, int); 2226 extern char *elfcore_write_ppc_vmx 2227 (bfd *, char *, int *, const void *, int); 2228 extern char *elfcore_write_ppc_vsx 2229 (bfd *, char *, int *, const void *, int); 2230 extern char *elfcore_write_s390_timer 2231 (bfd *, char *, int *, const void *, int); 2232 extern char *elfcore_write_s390_todcmp 2233 (bfd *, char *, int *, const void *, int); 2234 extern char *elfcore_write_s390_todpreg 2235 (bfd *, char *, int *, const void *, int); 2236 extern char *elfcore_write_s390_ctrs 2237 (bfd *, char *, int *, const void *, int); 2238 extern char *elfcore_write_s390_prefix 2239 (bfd *, char *, int *, const void *, int); 2240 extern char *elfcore_write_s390_last_break 2241 (bfd *, char *, int *, const void *, int); 2242 extern char *elfcore_write_s390_system_call 2243 (bfd *, char *, int *, const void *, int); 2244 extern char *elfcore_write_arm_vfp 2245 (bfd *, char *, int *, const void *, int); 2246 extern char *elfcore_write_lwpstatus 2247 (bfd *, char *, int *, long, int, const void *); 2248 extern char *elfcore_write_register_note 2249 (bfd *, char *, int *, const char *, const void *, int); 2250 2251 extern bfd *_bfd_elf32_bfd_from_remote_memory 2252 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2253 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 2254 extern bfd *_bfd_elf64_bfd_from_remote_memory 2255 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2256 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 2257 2258 extern bfd_vma bfd_elf_obj_attr_size (bfd *); 2259 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma); 2260 extern int bfd_elf_get_obj_attr_int (bfd *, int, int); 2261 extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int); 2262 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \ 2263 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2264 extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *); 2265 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \ 2266 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2267 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int, 2268 const char *); 2269 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \ 2270 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \ 2271 (INTVAL), (STRVAL)) 2272 2273 extern char *_bfd_elf_attr_strdup (bfd *, const char *); 2274 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *); 2275 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int); 2276 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *); 2277 extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *); 2278 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int); 2279 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *); 2280 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec); 2281 2282 /* The linker may need to keep track of the number of relocs that it 2283 decides to copy as dynamic relocs in check_relocs for each symbol. 2284 This is so that it can later discard them if they are found to be 2285 unnecessary. We can store the information in a field extending the 2286 regular ELF linker hash table. */ 2287 2288 struct elf_dyn_relocs 2289 { 2290 struct elf_dyn_relocs *next; 2291 2292 /* The input section of the reloc. */ 2293 asection *sec; 2294 2295 /* Total number of relocs copied for the input section. */ 2296 bfd_size_type count; 2297 2298 /* Number of pc-relative relocs copied for the input section. */ 2299 bfd_size_type pc_count; 2300 }; 2301 2302 extern bfd_boolean _bfd_elf_create_ifunc_sections 2303 (bfd *, struct bfd_link_info *); 2304 extern asection * _bfd_elf_create_ifunc_dyn_reloc 2305 (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc, 2306 struct elf_dyn_relocs **); 2307 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs 2308 (struct bfd_link_info *, struct elf_link_hash_entry *, 2309 struct elf_dyn_relocs **, unsigned int, unsigned int); 2310 2311 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *); 2312 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *); 2313 2314 extern bfd_vma elf64_r_info (bfd_vma, bfd_vma); 2315 extern bfd_vma elf64_r_sym (bfd_vma); 2316 extern bfd_vma elf32_r_info (bfd_vma, bfd_vma); 2317 extern bfd_vma elf32_r_sym (bfd_vma); 2318 2319 /* Large common section. */ 2320 extern asection _bfd_elf_large_com_section; 2321 2322 /* Hash for local symbol with the first section id, ID, in the input 2323 file and the local symbol index, SYM. */ 2324 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \ 2325 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \ 2326 ^ (SYM) ^ ((ID) >> 16)) 2327 2328 /* This is the condition under which finish_dynamic_symbol will be called. 2329 If our finish_dynamic_symbol isn't called, we'll need to do something 2330 about initializing any .plt and .got entries in relocate_section. */ 2331 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ 2332 ((DYN) \ 2333 && ((SHARED) || !(H)->forced_local) \ 2334 && ((H)->dynindx != -1 || (H)->forced_local)) 2335 2336 /* This macro is to avoid lots of duplicated code in the body 2337 of xxx_relocate_section() in the various elfxx-xxxx.c files. */ 2338 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ 2339 r_symndx, symtab_hdr, sym_hashes, \ 2340 h, sec, relocation, \ 2341 unresolved_reloc, warned) \ 2342 do \ 2343 { \ 2344 /* It seems this can happen with erroneous or unsupported \ 2345 input (mixing a.out and elf in an archive, for example.) */ \ 2346 if (sym_hashes == NULL) \ 2347 return FALSE; \ 2348 \ 2349 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ 2350 \ 2351 while (h->root.type == bfd_link_hash_indirect \ 2352 || h->root.type == bfd_link_hash_warning) \ 2353 h = (struct elf_link_hash_entry *) h->root.u.i.link; \ 2354 \ 2355 warned = FALSE; \ 2356 unresolved_reloc = FALSE; \ 2357 relocation = 0; \ 2358 if (h->root.type == bfd_link_hash_defined \ 2359 || h->root.type == bfd_link_hash_defweak) \ 2360 { \ 2361 sec = h->root.u.def.section; \ 2362 if (sec == NULL \ 2363 || sec->output_section == NULL) \ 2364 /* Set a flag that will be cleared later if we find a \ 2365 relocation value for this symbol. output_section \ 2366 is typically NULL for symbols satisfied by a shared \ 2367 library. */ \ 2368 unresolved_reloc = TRUE; \ 2369 else \ 2370 relocation = (h->root.u.def.value \ 2371 + sec->output_section->vma \ 2372 + sec->output_offset); \ 2373 } \ 2374 else if (h->root.type == bfd_link_hash_undefweak) \ 2375 ; \ 2376 else if (info->unresolved_syms_in_objects == RM_IGNORE \ 2377 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ 2378 ; \ 2379 else if (!info->relocatable) \ 2380 { \ 2381 bfd_boolean err; \ 2382 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ 2383 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ 2384 if (!info->callbacks->undefined_symbol (info, \ 2385 h->root.root.string, \ 2386 input_bfd, \ 2387 input_section, \ 2388 rel->r_offset, err)) \ 2389 return FALSE; \ 2390 warned = TRUE; \ 2391 } \ 2392 (void) unresolved_reloc; \ 2393 (void) warned; \ 2394 } \ 2395 while (0) 2396 2397 /* This macro is to avoid lots of duplicated code in the body of the 2398 loop over relocations in xxx_relocate_section() in the various 2399 elfxx-xxxx.c files. 2400 2401 Handle relocations against symbols from removed linkonce sections, 2402 or sections discarded by a linker script. When doing a relocatable 2403 link, we remove such relocations. Otherwise, we just want the 2404 section contents zeroed and avoid any special processing. */ 2405 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ 2406 rel, relend, howto, contents) \ 2407 { \ 2408 _bfd_clear_contents (howto, input_bfd, input_section, \ 2409 contents + rel->r_offset); \ 2410 \ 2411 if (info->relocatable \ 2412 && (input_section->flags & SEC_DEBUGGING)) \ 2413 { \ 2414 /* Only remove relocations in debug sections since other \ 2415 sections may require relocations. */ \ 2416 Elf_Internal_Shdr *rel_hdr; \ 2417 \ 2418 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ 2419 \ 2420 /* Avoid empty output section. */ \ 2421 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ 2422 { \ 2423 rel_hdr->sh_size -= rel_hdr->sh_entsize; \ 2424 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ 2425 rel_hdr->sh_size -= rel_hdr->sh_entsize; \ 2426 \ 2427 memmove (rel, rel + 1, (relend - rel - 1) * sizeof (*rel)); \ 2428 \ 2429 input_section->reloc_count--; \ 2430 relend--; \ 2431 rel--; \ 2432 continue; \ 2433 } \ 2434 } \ 2435 \ 2436 rel->r_info = 0; \ 2437 rel->r_addend = 0; \ 2438 continue; \ 2439 } 2440 2441 /* Will a symbol be bound to the the definition within the shared 2442 library, if any. A unique symbol can never be bound locally. */ 2443 #define SYMBOLIC_BIND(INFO, H) \ 2444 (!(H)->unique_global \ 2445 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))) 2446 2447 #endif /* _LIBELF_H_ */ 2448