1 /* BFD back-end data structures for ELF files. 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 3 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 #ifndef _LIBELF_H_ 25 #define _LIBELF_H_ 1 26 27 #include "elf/common.h" 28 #include "elf/external.h" 29 #include "elf/internal.h" 30 #include "bfdlink.h" 31 32 /* The number of entries in a section is its size divided by the size 33 of a single entry. This is normally only applicable to reloc and 34 symbol table sections. 35 PR 9934: It is possible to have relocations that do not refer to 36 symbols, thus it is also possible to have a relocation section in 37 an object file, but no symbol table. */ 38 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0) 39 40 /* If size isn't specified as 64 or 32, NAME macro should fail. */ 41 #ifndef NAME 42 #if ARCH_SIZE == 64 43 #define NAME(x, y) x ## 64 ## _ ## y 44 #endif 45 #if ARCH_SIZE == 32 46 #define NAME(x, y) x ## 32 ## _ ## y 47 #endif 48 #endif 49 50 #ifndef NAME 51 #define NAME(x, y) x ## NOSIZE ## _ ## y 52 #endif 53 54 #define ElfNAME(X) NAME(Elf,X) 55 #define elfNAME(X) NAME(elf,X) 56 57 /* Information held for an ELF symbol. The first field is the 58 corresponding asymbol. Every symbol is an ELF file is actually a 59 pointer to this structure, although it is often handled as a 60 pointer to an asymbol. */ 61 62 typedef struct 63 { 64 /* The BFD symbol. */ 65 asymbol symbol; 66 /* ELF symbol information. */ 67 Elf_Internal_Sym internal_elf_sym; 68 /* Backend specific information. */ 69 union 70 { 71 unsigned int hppa_arg_reloc; 72 void *mips_extr; 73 void *any; 74 } 75 tc_data; 76 77 /* Version information. This is from an Elf_Internal_Versym 78 structure in a SHT_GNU_versym section. It is zero if there is no 79 version information. */ 80 unsigned short version; 81 82 } elf_symbol_type; 83 84 struct elf_strtab_hash; 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 /* Symbol is referenced by a non-shared object (other than the object 157 in which it is defined). */ 158 unsigned int ref_regular : 1; 159 /* Symbol is defined by a non-shared object. */ 160 unsigned int def_regular : 1; 161 /* Symbol is referenced by a shared object. */ 162 unsigned int ref_dynamic : 1; 163 /* Symbol is defined by a shared object. */ 164 unsigned int def_dynamic : 1; 165 /* Symbol has a non-weak reference from a non-shared object (other than 166 the object in which it is defined). */ 167 unsigned int ref_regular_nonweak : 1; 168 /* Dynamic symbol has been adjustd. */ 169 unsigned int dynamic_adjusted : 1; 170 /* Symbol needs a copy reloc. */ 171 unsigned int needs_copy : 1; 172 /* Symbol needs a procedure linkage table entry. */ 173 unsigned int needs_plt : 1; 174 /* Symbol appears in a non-ELF input file. */ 175 unsigned int non_elf : 1; 176 /* Symbol should be marked as hidden in the version information. */ 177 unsigned int hidden : 1; 178 /* Symbol was forced to local scope due to a version script file. */ 179 unsigned int forced_local : 1; 180 /* Symbol was forced to be dynamic due to a version script file. */ 181 unsigned int dynamic : 1; 182 /* Symbol was marked during garbage collection. */ 183 unsigned int mark : 1; 184 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is 185 not currently set by all the backends. */ 186 unsigned int non_got_ref : 1; 187 /* Symbol has a definition in a shared object. 188 FIXME: There is no real need for this field if def_dynamic is never 189 cleared and all places that test def_dynamic also test def_regular. */ 190 unsigned int dynamic_def : 1; 191 /* Symbol is weak in all shared objects. */ 192 unsigned int dynamic_weak : 1; 193 /* Symbol is referenced with a relocation where C/C++ pointer equality 194 matters. */ 195 unsigned int pointer_equality_needed : 1; 196 /* Symbol is a unique global symbol. */ 197 unsigned int unique_global : 1; 198 199 /* String table index in .dynstr if this is a dynamic symbol. */ 200 unsigned long dynstr_index; 201 202 union 203 { 204 /* If this is a weak defined symbol from a dynamic object, this 205 field points to a defined symbol with the same value, if there is 206 one. Otherwise it is NULL. */ 207 struct elf_link_hash_entry *weakdef; 208 209 /* Hash value of the name computed using the ELF hash function. 210 Used part way through size_dynamic_sections, after we've finished 211 with weakdefs. */ 212 unsigned long elf_hash_value; 213 } u; 214 215 /* Version information. */ 216 union 217 { 218 /* This field is used for a symbol which is not defined in a 219 regular object. It points to the version information read in 220 from the dynamic object. */ 221 Elf_Internal_Verdef *verdef; 222 /* This field is used for a symbol which is defined in a regular 223 object. It is set up in size_dynamic_sections. It points to 224 the version information we should write out for this symbol. */ 225 struct bfd_elf_version_tree *vertree; 226 } verinfo; 227 228 struct elf_link_virtual_table_entry *vtable; 229 }; 230 231 /* Will references to this symbol always reference the symbol 232 in this object? */ 233 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \ 234 _bfd_elf_symbol_refs_local_p (H, INFO, 0) 235 236 /* Will _calls_ to this symbol always call the version in this object? */ 237 #define SYMBOL_CALLS_LOCAL(INFO, H) \ 238 _bfd_elf_symbol_refs_local_p (H, INFO, 1) 239 240 /* Common symbols that are turned into definitions don't have the 241 DEF_REGULAR flag set, so they might appear to be undefined. */ 242 #define ELF_COMMON_DEF_P(H) \ 243 (!(H)->def_regular \ 244 && !(H)->def_dynamic \ 245 && (H)->root.type == bfd_link_hash_defined) 246 247 /* Records local symbols to be emitted in the dynamic symbol table. */ 248 249 struct elf_link_local_dynamic_entry 250 { 251 struct elf_link_local_dynamic_entry *next; 252 253 /* The input bfd this symbol came from. */ 254 bfd *input_bfd; 255 256 /* The index of the local symbol being copied. */ 257 long input_indx; 258 259 /* The index in the outgoing dynamic symbol table. */ 260 long dynindx; 261 262 /* A copy of the input symbol. */ 263 Elf_Internal_Sym isym; 264 }; 265 266 struct elf_link_loaded_list 267 { 268 struct elf_link_loaded_list *next; 269 bfd *abfd; 270 }; 271 272 /* Structures used by the eh_frame optimization code. */ 273 struct eh_cie_fde 274 { 275 union { 276 struct { 277 /* If REMOVED == 1, this is the CIE that the FDE originally used. 278 The CIE belongs to the same .eh_frame input section as the FDE. 279 280 If REMOVED == 0, this is the CIE that we have chosen to use for 281 the output FDE. The CIE's REMOVED field is also 0, but the CIE 282 might belong to a different .eh_frame input section from the FDE. */ 283 struct eh_cie_fde *cie_inf; 284 struct eh_cie_fde *next_for_section; 285 } fde; 286 struct { 287 /* CIEs have three states: 288 289 - REMOVED && !MERGED: Slated for removal because we haven't yet 290 proven that an FDE needs it. FULL_CIE, if nonnull, points to 291 more detailed information about the CIE. 292 293 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH, 294 which may not belong to the same input section. 295 296 - !REMOVED: We have decided to keep this CIE. SEC is the 297 .eh_frame input section that contains the CIE. */ 298 union { 299 struct cie *full_cie; 300 struct eh_cie_fde *merged_with; 301 asection *sec; 302 } u; 303 304 /* The offset of the personality data from the start of the CIE, 305 or 0 if the CIE doesn't have any. */ 306 unsigned int personality_offset : 8; 307 308 /* True if we have marked relocations associated with this CIE. */ 309 unsigned int gc_mark : 1; 310 311 /* True if we have decided to turn an absolute LSDA encoding into 312 a PC-relative one. */ 313 unsigned int make_lsda_relative : 1; 314 315 /* True if we have decided to turn an absolute personality 316 encoding into a PC-relative one. */ 317 unsigned int make_per_encoding_relative : 1; 318 319 /* True if the CIE contains personality data and if that 320 data uses a PC-relative encoding. Always true when 321 make_per_encoding_relative is. */ 322 unsigned int per_encoding_relative : 1; 323 324 /* True if we need to add an 'R' (FDE encoding) entry to the 325 CIE's augmentation data. */ 326 unsigned int add_fde_encoding : 1; 327 328 /* True if we have merged this CIE with another. */ 329 unsigned int merged : 1; 330 331 /* Unused bits. */ 332 unsigned int pad1 : 18; 333 } cie; 334 } u; 335 unsigned int reloc_index; 336 unsigned int size; 337 unsigned int offset; 338 unsigned int new_offset; 339 unsigned int fde_encoding : 8; 340 unsigned int lsda_encoding : 8; 341 unsigned int lsda_offset : 8; 342 343 /* True if this entry represents a CIE, false if it represents an FDE. */ 344 unsigned int cie : 1; 345 346 /* True if this entry is currently marked for removal. */ 347 unsigned int removed : 1; 348 349 /* True if we need to add a 'z' (augmentation size) entry to the CIE's 350 augmentation data, and an associated byte to each of the CIE's FDEs. */ 351 unsigned int add_augmentation_size : 1; 352 353 /* True if we have decided to convert absolute FDE relocations into 354 relative ones. This applies to the first relocation in the FDE, 355 which is against the code that the FDE describes. */ 356 unsigned int make_relative : 1; 357 358 /* Unused bits. */ 359 unsigned int pad1 : 4; 360 361 unsigned int *set_loc; 362 }; 363 364 struct eh_frame_sec_info 365 { 366 unsigned int count; 367 struct cie *cies; 368 struct eh_cie_fde entry[1]; 369 }; 370 371 struct eh_frame_array_ent 372 { 373 bfd_vma initial_loc; 374 bfd_vma fde; 375 }; 376 377 struct htab; 378 379 struct eh_frame_hdr_info 380 { 381 struct htab *cies; 382 asection *hdr_sec; 383 unsigned int fde_count, array_count; 384 struct eh_frame_array_ent *array; 385 /* TRUE if we should try to merge CIEs between input sections. */ 386 bfd_boolean merge_cies; 387 /* TRUE if all .eh_frames have been parsd. */ 388 bfd_boolean parsed_eh_frames; 389 /* TRUE if .eh_frame_hdr should contain the sorted search table. 390 We build it if we successfully read all .eh_frame input sections 391 and recognize them. */ 392 bfd_boolean table; 393 }; 394 395 /* Enum used to identify target specific extensions to the elf_obj_tdata 396 and elf_link_hash_table structures. Note the enums deliberately start 397 from 1 so that we can detect an uninitialized field. The generic value 398 is last so that additions to this enum do not need to modify more than 399 one line. */ 400 enum elf_target_id 401 { 402 ALPHA_ELF_DATA = 1, 403 ARM_ELF_DATA, 404 AVR_ELF_DATA, 405 BFIN_ELF_DATA, 406 CRIS_ELF_DATA, 407 FRV_ELF_DATA, 408 HPPA32_ELF_DATA, 409 HPPA64_ELF_DATA, 410 I386_ELF_DATA, 411 IA64_ELF_DATA, 412 LM32_ELF_DATA, 413 M32R_ELF_DATA, 414 M68HC11_ELF_DATA, 415 M68K_ELF_DATA, 416 MICROBLAZE_ELF_DATA, 417 MIPS_ELF_DATA, 418 MN10300_ELF_DATA, 419 PPC32_ELF_DATA, 420 PPC64_ELF_DATA, 421 S390_ELF_DATA, 422 SH_ELF_DATA, 423 SPARC_ELF_DATA, 424 SPU_ELF_DATA, 425 TIC6X_ELF_DATA, 426 X86_64_ELF_DATA, 427 XTENSA_ELF_DATA, 428 GENERIC_ELF_DATA 429 }; 430 431 /* ELF linker hash table. */ 432 433 struct elf_link_hash_table 434 { 435 struct bfd_link_hash_table root; 436 437 /* An identifier used to distinguish different target 438 specific extensions to this structure. */ 439 enum elf_target_id hash_table_id; 440 441 /* Whether we have created the special dynamic sections required 442 when linking against or generating a shared object. */ 443 bfd_boolean dynamic_sections_created; 444 445 /* True if this target has relocatable executables, so needs dynamic 446 section symbols. */ 447 bfd_boolean is_relocatable_executable; 448 449 /* The BFD used to hold special sections created by the linker. 450 This will be the first BFD found which requires these sections to 451 be created. */ 452 bfd *dynobj; 453 454 /* The value to use when initialising got.refcount/offset and 455 plt.refcount/offset in an elf_link_hash_entry. Set to zero when 456 the values are refcounts. Set to init_got_offset/init_plt_offset 457 in size_dynamic_sections when the values may be offsets. */ 458 union gotplt_union init_got_refcount; 459 union gotplt_union init_plt_refcount; 460 461 /* The value to use for got.refcount/offset and plt.refcount/offset 462 when the values may be offsets. Normally (bfd_vma) -1. */ 463 union gotplt_union init_got_offset; 464 union gotplt_union init_plt_offset; 465 466 /* The number of symbols found in the link which must be put into 467 the .dynsym section. */ 468 bfd_size_type dynsymcount; 469 470 /* The string table of dynamic symbols, which becomes the .dynstr 471 section. */ 472 struct elf_strtab_hash *dynstr; 473 474 /* The number of buckets in the hash table in the .hash section. 475 This is based on the number of dynamic symbols. */ 476 bfd_size_type bucketcount; 477 478 /* A linked list of DT_NEEDED names found in dynamic objects 479 included in the link. */ 480 struct bfd_link_needed_list *needed; 481 482 /* Sections in the output bfd that provides a section symbol 483 to be used by relocations emitted against local symbols. 484 Most targets will not use data_index_section. */ 485 asection *text_index_section; 486 asection *data_index_section; 487 488 /* The _GLOBAL_OFFSET_TABLE_ symbol. */ 489 struct elf_link_hash_entry *hgot; 490 491 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */ 492 struct elf_link_hash_entry *hplt; 493 494 /* A pointer to information used to merge SEC_MERGE sections. */ 495 void *merge_info; 496 497 /* Used to link stabs in sections. */ 498 struct stab_info stab_info; 499 500 /* Used by eh_frame code when editing .eh_frame. */ 501 struct eh_frame_hdr_info eh_info; 502 503 /* A linked list of local symbols to be added to .dynsym. */ 504 struct elf_link_local_dynamic_entry *dynlocal; 505 506 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic 507 objects included in the link. */ 508 struct bfd_link_needed_list *runpath; 509 510 /* Cached first output tls section and size of PT_TLS segment. */ 511 asection *tls_sec; 512 bfd_size_type tls_size; 513 514 /* A linked list of BFD's loaded in the link. */ 515 struct elf_link_loaded_list *loaded; 516 517 /* Short-cuts to get to dynamic linker sections. */ 518 asection *sgot; 519 asection *sgotplt; 520 asection *srelgot; 521 asection *splt; 522 asection *srelplt; 523 asection *igotplt; 524 asection *iplt; 525 asection *irelplt; 526 asection *irelifunc; 527 }; 528 529 /* Look up an entry in an ELF linker hash table. */ 530 531 #define elf_link_hash_lookup(table, string, create, copy, follow) \ 532 ((struct elf_link_hash_entry *) \ 533 bfd_link_hash_lookup (&(table)->root, (string), (create), \ 534 (copy), (follow))) 535 536 /* Traverse an ELF linker hash table. */ 537 538 #define elf_link_hash_traverse(table, func, info) \ 539 (bfd_link_hash_traverse \ 540 (&(table)->root, \ 541 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 542 (info))) 543 544 /* Get the ELF linker hash table from a link_info structure. */ 545 546 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) 547 548 #define elf_hash_table_id(table) ((table) -> hash_table_id) 549 550 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */ 551 #define is_elf_hash_table(htab) \ 552 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) 553 554 /* Used by bfd_sym_from_r_symndx to cache a small number of local 555 symbols. */ 556 #define LOCAL_SYM_CACHE_SIZE 32 557 struct sym_cache 558 { 559 bfd *abfd; 560 unsigned long indx[LOCAL_SYM_CACHE_SIZE]; 561 Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE]; 562 }; 563 564 /* Constant information held for an ELF backend. */ 565 566 struct elf_size_info { 567 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; 568 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; 569 570 /* The size of entries in the .hash section. */ 571 unsigned char sizeof_hash_entry; 572 573 /* The number of internal relocations to allocate per external 574 relocation entry. */ 575 unsigned char int_rels_per_ext_rel; 576 /* We use some fixed size arrays. This should be large enough to 577 handle all back-ends. */ 578 #define MAX_INT_RELS_PER_EXT_REL 3 579 580 unsigned char arch_size, log_file_align; 581 unsigned char elfclass, ev_current; 582 int (*write_out_phdrs) 583 (bfd *, const Elf_Internal_Phdr *, unsigned int); 584 bfd_boolean 585 (*write_shdrs_and_ehdr) (bfd *); 586 bfd_boolean (*checksum_contents) 587 (bfd * , void (*) (const void *, size_t, void *), void *); 588 void (*write_relocs) 589 (bfd *, asection *, void *); 590 bfd_boolean (*swap_symbol_in) 591 (bfd *, const void *, const void *, Elf_Internal_Sym *); 592 void (*swap_symbol_out) 593 (bfd *, const Elf_Internal_Sym *, void *, void *); 594 bfd_boolean (*slurp_reloc_table) 595 (bfd *, asection *, asymbol **, bfd_boolean); 596 long (*slurp_symbol_table) 597 (bfd *, asymbol **, bfd_boolean); 598 void (*swap_dyn_in) 599 (bfd *, const void *, Elf_Internal_Dyn *); 600 void (*swap_dyn_out) 601 (bfd *, const Elf_Internal_Dyn *, void *); 602 603 /* This function is called to swap in a REL relocation. If an 604 external relocation corresponds to more than one internal 605 relocation, then all relocations are swapped in at once. */ 606 void (*swap_reloc_in) 607 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 608 609 /* This function is called to swap out a REL relocation. */ 610 void (*swap_reloc_out) 611 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 612 613 /* This function is called to swap in a RELA relocation. If an 614 external relocation corresponds to more than one internal 615 relocation, then all relocations are swapped in at once. */ 616 void (*swap_reloca_in) 617 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 618 619 /* This function is called to swap out a RELA relocation. */ 620 void (*swap_reloca_out) 621 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 622 }; 623 624 #define elf_symbol_from(ABFD,S) \ 625 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ 626 && (S)->the_bfd->tdata.elf_obj_data != 0) \ 627 ? (elf_symbol_type *) (S) \ 628 : 0) 629 630 enum elf_reloc_type_class { 631 reloc_class_normal, 632 reloc_class_relative, 633 reloc_class_plt, 634 reloc_class_copy 635 }; 636 637 struct elf_reloc_cookie 638 { 639 Elf_Internal_Rela *rels, *rel, *relend; 640 Elf_Internal_Sym *locsyms; 641 bfd *abfd; 642 size_t locsymcount; 643 size_t extsymoff; 644 struct elf_link_hash_entry **sym_hashes; 645 int r_sym_shift; 646 bfd_boolean bad_symtab; 647 }; 648 649 /* The level of IRIX compatibility we're striving for. */ 650 651 typedef enum { 652 ict_none, 653 ict_irix5, 654 ict_irix6 655 } irix_compat_t; 656 657 /* Mapping of ELF section names and types. */ 658 struct bfd_elf_special_section 659 { 660 const char *prefix; 661 int prefix_length; 662 /* 0 means name must match PREFIX exactly. 663 -1 means name must start with PREFIX followed by an arbitrary string. 664 -2 means name must match PREFIX exactly or consist of PREFIX followed 665 by a dot then anything. 666 > 0 means name must start with the first PREFIX_LENGTH chars of 667 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ 668 int suffix_length; 669 int type; 670 bfd_vma attr; 671 }; 672 673 enum action_discarded 674 { 675 COMPLAIN = 1, 676 PRETEND = 2 677 }; 678 679 typedef asection * (*elf_gc_mark_hook_fn) 680 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 681 struct elf_link_hash_entry *, Elf_Internal_Sym *); 682 683 struct elf_backend_data 684 { 685 /* The architecture for this backend. */ 686 enum bfd_architecture arch; 687 688 /* An identifier used to distinguish different target specific 689 extensions to elf_obj_tdata and elf_link_hash_table structures. */ 690 enum elf_target_id target_id; 691 692 /* The ELF machine code (EM_xxxx) for this backend. */ 693 int elf_machine_code; 694 695 /* EI_OSABI. */ 696 int elf_osabi; 697 698 /* The maximum page size for this backend. */ 699 bfd_vma maxpagesize; 700 701 /* The minimum page size for this backend. An input object will not be 702 considered page aligned unless its sections are correctly aligned for 703 pages at least this large. May be smaller than maxpagesize. */ 704 bfd_vma minpagesize; 705 706 /* The common page size for this backend. */ 707 bfd_vma commonpagesize; 708 709 /* The BFD flags applied to sections created for dynamic linking. */ 710 flagword dynamic_sec_flags; 711 712 /* A function to translate an ELF RELA relocation to a BFD arelent 713 structure. */ 714 void (*elf_info_to_howto) 715 (bfd *, arelent *, Elf_Internal_Rela *); 716 717 /* A function to translate an ELF REL relocation to a BFD arelent 718 structure. */ 719 void (*elf_info_to_howto_rel) 720 (bfd *, arelent *, Elf_Internal_Rela *); 721 722 /* A function to determine whether a symbol is global when 723 partitioning the symbol table into local and global symbols. 724 This should be NULL for most targets, in which case the correct 725 thing will be done. MIPS ELF, at least on the Irix 5, has 726 special requirements. */ 727 bfd_boolean (*elf_backend_sym_is_global) 728 (bfd *, asymbol *); 729 730 /* The remaining functions are hooks which are called only if they 731 are not NULL. */ 732 733 /* A function to permit a backend specific check on whether a 734 particular BFD format is relevant for an object file, and to 735 permit the backend to set any global information it wishes. When 736 this is called elf_elfheader is set, but anything else should be 737 used with caution. If this returns FALSE, the check_format 738 routine will return a bfd_error_wrong_format error. */ 739 bfd_boolean (*elf_backend_object_p) 740 (bfd *); 741 742 /* A function to do additional symbol processing when reading the 743 ELF symbol table. This is where any processor-specific special 744 section indices are handled. */ 745 void (*elf_backend_symbol_processing) 746 (bfd *, asymbol *); 747 748 /* A function to do additional symbol processing after reading the 749 entire ELF symbol table. */ 750 bfd_boolean (*elf_backend_symbol_table_processing) 751 (bfd *, elf_symbol_type *, unsigned int); 752 753 /* A function to set the type of the info field. Processor-specific 754 types should be handled here. */ 755 int (*elf_backend_get_symbol_type) 756 (Elf_Internal_Sym *, int); 757 758 /* A function to return the linker hash table entry of a symbol that 759 might be satisfied by an archive symbol. */ 760 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup) 761 (bfd *, struct bfd_link_info *, const char *); 762 763 /* Return true if local section symbols should have a non-null st_name. 764 NULL implies false. */ 765 bfd_boolean (*elf_backend_name_local_section_symbols) 766 (bfd *); 767 768 /* A function to do additional processing on the ELF section header 769 just before writing it out. This is used to set the flags and 770 type fields for some sections, or to actually write out data for 771 unusual sections. */ 772 bfd_boolean (*elf_backend_section_processing) 773 (bfd *, Elf_Internal_Shdr *); 774 775 /* A function to handle unusual section types when creating BFD 776 sections from ELF sections. */ 777 bfd_boolean (*elf_backend_section_from_shdr) 778 (bfd *, Elf_Internal_Shdr *, const char *, int); 779 780 /* A function to convert machine dependent ELF section header flags to 781 BFD internal section header flags. */ 782 bfd_boolean (*elf_backend_section_flags) 783 (flagword *, const Elf_Internal_Shdr *); 784 785 /* A function that returns a struct containing ELF section flags and 786 type for the given BFD section. */ 787 const struct bfd_elf_special_section * (*get_sec_type_attr) 788 (bfd *, asection *); 789 790 /* A function to handle unusual program segment types when creating BFD 791 sections from ELF program segments. */ 792 bfd_boolean (*elf_backend_section_from_phdr) 793 (bfd *, Elf_Internal_Phdr *, int, const char *); 794 795 /* A function to set up the ELF section header for a BFD section in 796 preparation for writing it out. This is where the flags and type 797 fields are set for unusual sections. */ 798 bfd_boolean (*elf_backend_fake_sections) 799 (bfd *, Elf_Internal_Shdr *, asection *); 800 801 /* A function to get the ELF section index for a BFD section. If 802 this returns TRUE, the section was found. If it is a normal ELF 803 section, *RETVAL should be left unchanged. If it is not a normal 804 ELF section *RETVAL should be set to the SHN_xxxx index. */ 805 bfd_boolean (*elf_backend_section_from_bfd_section) 806 (bfd *, asection *, int *retval); 807 808 /* If this field is not NULL, it is called by the add_symbols phase 809 of a link just before adding a symbol to the global linker hash 810 table. It may modify any of the fields as it wishes. If *NAME 811 is set to NULL, the symbol will be skipped rather than being 812 added to the hash table. This function is responsible for 813 handling all processor dependent symbol bindings and section 814 indices, and must set at least *FLAGS and *SEC for each processor 815 dependent case; failure to do so will cause a link error. */ 816 bfd_boolean (*elf_add_symbol_hook) 817 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *, 818 const char **name, flagword *flags, asection **sec, bfd_vma *value); 819 820 /* If this field is not NULL, it is called by the elf_link_output_sym 821 phase of a link for each symbol which will appear in the object file. 822 On error, this function returns 0. 1 is returned when the symbol 823 should be output, 2 is returned when the symbol should be discarded. */ 824 int (*elf_backend_link_output_symbol_hook) 825 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *, 826 asection *, struct elf_link_hash_entry *); 827 828 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend 829 linker the first time it encounters a dynamic object in the link. 830 This function must create any sections required for dynamic 831 linking. The ABFD argument is a dynamic object. The .interp, 832 .dynamic, .dynsym, .dynstr, and .hash functions have already been 833 created, and this function may modify the section flags if 834 desired. This function will normally create the .got and .plt 835 sections, but different backends have different requirements. */ 836 bfd_boolean (*elf_backend_create_dynamic_sections) 837 (bfd *abfd, struct bfd_link_info *info); 838 839 /* When creating a shared library, determine whether to omit the 840 dynamic symbol for the section. */ 841 bfd_boolean (*elf_backend_omit_section_dynsym) 842 (bfd *output_bfd, struct bfd_link_info *info, asection *osec); 843 844 /* Return TRUE if relocations of targets are compatible to the extent 845 that CHECK_RELOCS will properly process them. PR 4424. */ 846 bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *); 847 848 /* The CHECK_RELOCS function is called by the add_symbols phase of 849 the ELF backend linker. It is called once for each section with 850 relocs of an object file, just after the symbols for the object 851 file have been added to the global linker hash table. The 852 function must look through the relocs and do any special handling 853 required. This generally means allocating space in the global 854 offset table, and perhaps allocating space for a reloc. The 855 relocs are always passed as Rela structures; if the section 856 actually uses Rel structures, the r_addend field will always be 857 zero. */ 858 bfd_boolean (*check_relocs) 859 (bfd *abfd, struct bfd_link_info *info, asection *o, 860 const Elf_Internal_Rela *relocs); 861 862 /* The CHECK_DIRECTIVES function is called once per input file by 863 the add_symbols phase of the ELF backend linker. The function 864 must inspect the bfd and create any additional symbols according 865 to any custom directives in the bfd. */ 866 bfd_boolean (*check_directives) 867 (bfd *abfd, struct bfd_link_info *info); 868 869 /* The AS_NEEDED_CLEANUP function is called once per --as-needed 870 input file that was not needed by the add_symbols phase of the 871 ELF backend linker. The function must undo any target specific 872 changes in the symbol hash table. */ 873 bfd_boolean (*as_needed_cleanup) 874 (bfd *abfd, struct bfd_link_info *info); 875 876 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend 877 linker for every symbol which is defined by a dynamic object and 878 referenced by a regular object. This is called after all the 879 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS 880 function has been called. The hash table entry should be 881 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be 882 defined in a section from a dynamic object. Dynamic object 883 sections are not included in the final link, and this function is 884 responsible for changing the value to something which the rest of 885 the link can deal with. This will normally involve adding an 886 entry to the .plt or .got or some such section, and setting the 887 symbol to point to that. */ 888 bfd_boolean (*elf_backend_adjust_dynamic_symbol) 889 (struct bfd_link_info *info, struct elf_link_hash_entry *h); 890 891 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker 892 after all the linker input files have been seen but before the 893 section sizes have been set. This is called after 894 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */ 895 bfd_boolean (*elf_backend_always_size_sections) 896 (bfd *output_bfd, struct bfd_link_info *info); 897 898 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend 899 linker after all the linker input files have been seen but before 900 the sections sizes have been set. This is called after 901 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols. 902 It is only called when linking against a dynamic object. It must 903 set the sizes of the dynamic sections, and may fill in their 904 contents as well. The generic ELF linker can handle the .dynsym, 905 .dynstr and .hash sections. This function must handle the 906 .interp section and any sections created by the 907 CREATE_DYNAMIC_SECTIONS entry point. */ 908 bfd_boolean (*elf_backend_size_dynamic_sections) 909 (bfd *output_bfd, struct bfd_link_info *info); 910 911 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections 912 we keep to use as a base for relocs and symbols. */ 913 void (*elf_backend_init_index_section) 914 (bfd *output_bfd, struct bfd_link_info *info); 915 916 /* The RELOCATE_SECTION function is called by the ELF backend linker 917 to handle the relocations for a section. 918 919 The relocs are always passed as Rela structures; if the section 920 actually uses Rel structures, the r_addend field will always be 921 zero. 922 923 This function is responsible for adjust the section contents as 924 necessary, and (if using Rela relocs and generating a 925 relocatable output file) adjusting the reloc addend as 926 necessary. 927 928 This function does not have to worry about setting the reloc 929 address or the reloc symbol index. 930 931 LOCAL_SYMS is a pointer to the swapped in local symbols. 932 933 LOCAL_SECTIONS is an array giving the section in the input file 934 corresponding to the st_shndx field of each local symbol. 935 936 The global hash table entry for the global symbols can be found 937 via elf_sym_hashes (input_bfd). 938 939 When generating relocatable output, this function must handle 940 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 941 going to be the section symbol corresponding to the output 942 section, which means that the addend must be adjusted 943 accordingly. 944 945 Returns FALSE on error, TRUE on success, 2 if successful and 946 relocations should be written for this section. */ 947 int (*elf_backend_relocate_section) 948 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd, 949 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs, 950 Elf_Internal_Sym *local_syms, asection **local_sections); 951 952 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend 953 linker just before it writes a symbol out to the .dynsym section. 954 The processor backend may make any required adjustment to the 955 symbol. It may also take the opportunity to set contents of the 956 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on 957 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called 958 on those symbols which are defined by a dynamic object. */ 959 bfd_boolean (*elf_backend_finish_dynamic_symbol) 960 (bfd *output_bfd, struct bfd_link_info *info, 961 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym); 962 963 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend 964 linker just before it writes all the dynamic sections out to the 965 output file. The FINISH_DYNAMIC_SYMBOL will have been called on 966 all dynamic symbols. */ 967 bfd_boolean (*elf_backend_finish_dynamic_sections) 968 (bfd *output_bfd, struct bfd_link_info *info); 969 970 /* A function to do any beginning processing needed for the ELF file 971 before building the ELF headers and computing file positions. */ 972 void (*elf_backend_begin_write_processing) 973 (bfd *, struct bfd_link_info *); 974 975 /* A function to do any final processing needed for the ELF file 976 before writing it out. The LINKER argument is TRUE if this BFD 977 was created by the ELF backend linker. */ 978 void (*elf_backend_final_write_processing) 979 (bfd *, bfd_boolean linker); 980 981 /* This function is called by get_program_header_size. It should 982 return the number of additional program segments which this BFD 983 will need. It should return -1 on error. */ 984 int (*elf_backend_additional_program_headers) 985 (bfd *, struct bfd_link_info *); 986 987 /* This function is called to modify an existing segment map in a 988 backend specific fashion. */ 989 bfd_boolean (*elf_backend_modify_segment_map) 990 (bfd *, struct bfd_link_info *); 991 992 /* This function is called to modify program headers just before 993 they are written. */ 994 bfd_boolean (*elf_backend_modify_program_headers) 995 (bfd *, struct bfd_link_info *); 996 997 /* This function is called before section garbage collection to 998 mark entry symbol sections. */ 999 void (*gc_keep) 1000 (struct bfd_link_info *); 1001 1002 /* This function is called during section garbage collection to 1003 mark sections that define global symbols. */ 1004 bfd_boolean (*gc_mark_dynamic_ref) 1005 (struct elf_link_hash_entry *, void *); 1006 1007 /* This function is called during section gc to discover the section a 1008 particular relocation refers to. */ 1009 elf_gc_mark_hook_fn gc_mark_hook; 1010 1011 /* This function, if defined, is called after the first gc marking pass 1012 to allow the backend to mark additional sections. */ 1013 bfd_boolean (*gc_mark_extra_sections) 1014 (struct bfd_link_info *, elf_gc_mark_hook_fn); 1015 1016 /* This function, if defined, is called during the sweep phase of gc 1017 in order that a backend might update any data structures it might 1018 be maintaining. */ 1019 bfd_boolean (*gc_sweep_hook) 1020 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 1021 1022 /* This function, if defined, is called after the ELF headers have 1023 been created. This allows for things like the OS and ABI versions 1024 to be changed. */ 1025 void (*elf_backend_post_process_headers) 1026 (bfd *, struct bfd_link_info *); 1027 1028 /* This function, if defined, prints a symbol to file and returns the 1029 name of the symbol to be printed. It should return NULL to fall 1030 back to default symbol printing. */ 1031 const char *(*elf_backend_print_symbol_all) 1032 (bfd *, void *, asymbol *); 1033 1034 /* This function, if defined, is called after all local symbols and 1035 global symbols converted to locals are emitted into the symtab 1036 section. It allows the backend to emit special local symbols 1037 not handled in the hash table. */ 1038 bfd_boolean (*elf_backend_output_arch_local_syms) 1039 (bfd *, struct bfd_link_info *, void *, 1040 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 1041 struct elf_link_hash_entry *)); 1042 1043 /* This function, if defined, is called after all symbols are emitted 1044 into the symtab section. It allows the backend to emit special 1045 global symbols not handled in the hash table. */ 1046 bfd_boolean (*elf_backend_output_arch_syms) 1047 (bfd *, struct bfd_link_info *, void *, 1048 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, 1049 struct elf_link_hash_entry *)); 1050 1051 /* Copy any information related to dynamic linking from a pre-existing 1052 symbol to a newly created symbol. Also called to copy flags and 1053 other back-end info to a weakdef, in which case the symbol is not 1054 newly created and plt/got refcounts and dynamic indices should not 1055 be copied. */ 1056 void (*elf_backend_copy_indirect_symbol) 1057 (struct bfd_link_info *, struct elf_link_hash_entry *, 1058 struct elf_link_hash_entry *); 1059 1060 /* Modify any information related to dynamic linking such that the 1061 symbol is not exported. */ 1062 void (*elf_backend_hide_symbol) 1063 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1064 1065 /* A function to do additional symbol fixup, called by 1066 _bfd_elf_fix_symbol_flags. */ 1067 bfd_boolean (*elf_backend_fixup_symbol) 1068 (struct bfd_link_info *, struct elf_link_hash_entry *); 1069 1070 /* Merge the backend specific symbol attribute. */ 1071 void (*elf_backend_merge_symbol_attribute) 1072 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, 1073 bfd_boolean); 1074 1075 /* This function, if defined, will return a string containing the 1076 name of a target-specific dynamic tag. */ 1077 char *(*elf_backend_get_target_dtag) 1078 (bfd_vma); 1079 1080 /* Decide whether an undefined symbol is special and can be ignored. 1081 This is the case for OPTIONAL symbols on IRIX. */ 1082 bfd_boolean (*elf_backend_ignore_undef_symbol) 1083 (struct elf_link_hash_entry *); 1084 1085 /* Emit relocations. Overrides default routine for emitting relocs, 1086 except during a relocatable link, or if all relocs are being emitted. */ 1087 bfd_boolean (*elf_backend_emit_relocs) 1088 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1089 struct elf_link_hash_entry **); 1090 1091 /* Count relocations. Not called for relocatable links 1092 or if all relocs are being preserved in the output. */ 1093 unsigned int (*elf_backend_count_relocs) 1094 (struct bfd_link_info *, asection *); 1095 1096 /* This function, if defined, is called when an NT_PRSTATUS note is found 1097 in a core file. */ 1098 bfd_boolean (*elf_backend_grok_prstatus) 1099 (bfd *, Elf_Internal_Note *); 1100 1101 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO 1102 note is found in a core file. */ 1103 bfd_boolean (*elf_backend_grok_psinfo) 1104 (bfd *, Elf_Internal_Note *); 1105 1106 /* This function, if defined, is called to write a note to a corefile. */ 1107 char *(*elf_backend_write_core_note) 1108 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...); 1109 1110 /* This function returns class of a reloc type. */ 1111 enum elf_reloc_type_class (*elf_backend_reloc_type_class) 1112 (const Elf_Internal_Rela *); 1113 1114 /* This function, if defined, removes information about discarded functions 1115 from other sections which mention them. */ 1116 bfd_boolean (*elf_backend_discard_info) 1117 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 1118 1119 /* This function, if defined, signals that the function above has removed 1120 the discarded relocations for this section. */ 1121 bfd_boolean (*elf_backend_ignore_discarded_relocs) 1122 (asection *); 1123 1124 /* What to do when ld finds relocations against symbols defined in 1125 discarded sections. */ 1126 unsigned int (*action_discarded) 1127 (asection *); 1128 1129 /* This function returns the width of FDE pointers in bytes, or 0 if 1130 that can't be determined for some reason. The default definition 1131 goes by the bfd's EI_CLASS. */ 1132 unsigned int (*elf_backend_eh_frame_address_size) 1133 (bfd *, asection *); 1134 1135 /* These functions tell elf-eh-frame whether to attempt to turn 1136 absolute or lsda encodings into pc-relative ones. The default 1137 definition enables these transformations. */ 1138 bfd_boolean (*elf_backend_can_make_relative_eh_frame) 1139 (bfd *, struct bfd_link_info *, asection *); 1140 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) 1141 (bfd *, struct bfd_link_info *, asection *); 1142 1143 /* This function returns an encoding after computing the encoded 1144 value (and storing it in ENCODED) for the given OFFSET into OSEC, 1145 to be stored in at LOC_OFFSET into the LOC_SEC input section. 1146 The default definition chooses a 32-bit PC-relative encoding. */ 1147 bfd_byte (*elf_backend_encode_eh_address) 1148 (bfd *abfd, struct bfd_link_info *info, 1149 asection *osec, bfd_vma offset, 1150 asection *loc_sec, bfd_vma loc_offset, 1151 bfd_vma *encoded); 1152 1153 /* This function, if defined, may write out the given section. 1154 Returns TRUE if it did so and FALSE if the caller should. */ 1155 bfd_boolean (*elf_backend_write_section) 1156 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1157 1158 /* The level of IRIX compatibility we're striving for. 1159 MIPS ELF specific function. */ 1160 irix_compat_t (*elf_backend_mips_irix_compat) 1161 (bfd *); 1162 1163 reloc_howto_type *(*elf_backend_mips_rtype_to_howto) 1164 (unsigned int, bfd_boolean); 1165 1166 /* The swapping table to use when dealing with ECOFF information. 1167 Used for the MIPS ELF .mdebug section. */ 1168 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; 1169 1170 /* This function implements `bfd_elf_bfd_from_remote_memory'; 1171 see elf.c, elfcode.h. */ 1172 bfd *(*elf_backend_bfd_from_remote_memory) 1173 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 1174 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len)); 1175 1176 /* This function is used by `_bfd_elf_get_synthetic_symtab'; 1177 see elf.c. */ 1178 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); 1179 1180 /* Is symbol defined in common section? */ 1181 bfd_boolean (*common_definition) (Elf_Internal_Sym *); 1182 1183 /* Return a common section index for section. */ 1184 unsigned int (*common_section_index) (asection *); 1185 1186 /* Return a common section for section. */ 1187 asection *(*common_section) (asection *); 1188 1189 /* Return TRUE if we can merge 2 definitions. */ 1190 bfd_boolean (*merge_symbol) (struct bfd_link_info *, 1191 struct elf_link_hash_entry **, 1192 struct elf_link_hash_entry *, 1193 Elf_Internal_Sym *, asection **, 1194 bfd_vma *, unsigned int *, 1195 bfd_boolean *, bfd_boolean *, 1196 bfd_boolean *, bfd_boolean *, 1197 bfd_boolean *, bfd_boolean *, 1198 bfd_boolean *, bfd_boolean *, 1199 bfd *, asection **, 1200 bfd_boolean *, bfd_boolean *, 1201 bfd_boolean *, bfd_boolean *, 1202 bfd *, asection **); 1203 1204 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 1205 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *); 1206 1207 /* Return TRUE if type is a function symbol type. */ 1208 bfd_boolean (*is_function_type) (unsigned int type); 1209 1210 /* Used to handle bad SHF_LINK_ORDER input. */ 1211 bfd_error_handler_type link_order_error_handler; 1212 1213 /* Name of the PLT relocation section. */ 1214 const char *relplt_name; 1215 1216 /* Alternate EM_xxxx machine codes for this backend. */ 1217 int elf_machine_alt1; 1218 int elf_machine_alt2; 1219 1220 const struct elf_size_info *s; 1221 1222 /* An array of target specific special sections. */ 1223 const struct bfd_elf_special_section *special_sections; 1224 1225 /* The size in bytes of the header for the GOT. This includes the 1226 so-called reserved entries on some systems. */ 1227 bfd_vma got_header_size; 1228 1229 /* The size of the GOT entry for the symbol pointed to by H if non-NULL, 1230 otherwise by the local symbol with index SYMNDX in IBFD. */ 1231 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *, 1232 struct elf_link_hash_entry *h, 1233 bfd *ibfd, unsigned long symndx); 1234 1235 /* The vendor name to use for a processor-standard attributes section. */ 1236 const char *obj_attrs_vendor; 1237 1238 /* The section name to use for a processor-standard attributes section. */ 1239 const char *obj_attrs_section; 1240 1241 /* Return 1, 2 or 3 to indicate what type of arguments a 1242 processor-specific tag takes. */ 1243 int (*obj_attrs_arg_type) (int); 1244 1245 /* The section type to use for an attributes section. */ 1246 unsigned int obj_attrs_section_type; 1247 1248 /* This function determines the order in which any attributes are 1249 written. It must be defined for input in the range 1250 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range 1251 is used in order to make unity easy). The returned value is the 1252 actual tag number to place in the input position. */ 1253 int (*obj_attrs_order) (int); 1254 1255 /* Handle merging unknown attributes; either warn and return TRUE, 1256 or give an error and return FALSE. */ 1257 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int); 1258 1259 /* This is non-zero if static TLS segments require a special alignment. */ 1260 unsigned static_tls_alignment; 1261 1262 /* This is TRUE if the linker should act like collect and gather 1263 global constructors and destructors by name. This is TRUE for 1264 MIPS ELF because the Irix 5 tools can not handle the .init 1265 section. */ 1266 unsigned collect : 1; 1267 1268 /* This is TRUE if the linker should ignore changes to the type of a 1269 symbol. This is TRUE for MIPS ELF because some Irix 5 objects 1270 record undefined functions as STT_OBJECT although the definitions 1271 are STT_FUNC. */ 1272 unsigned type_change_ok : 1; 1273 1274 /* Whether the backend may use REL relocations. (Some backends use 1275 both REL and RELA relocations, and this flag is set for those 1276 backends.) */ 1277 unsigned may_use_rel_p : 1; 1278 1279 /* Whether the backend may use RELA relocations. (Some backends use 1280 both REL and RELA relocations, and this flag is set for those 1281 backends.) */ 1282 unsigned may_use_rela_p : 1; 1283 1284 /* Whether the default relocation type is RELA. If a backend with 1285 this flag set wants REL relocations for a particular section, 1286 it must note that explicitly. Similarly, if this flag is clear, 1287 and the backend wants RELA relocations for a particular 1288 section. */ 1289 unsigned default_use_rela_p : 1; 1290 1291 /* True if PLT and copy relocations should be RELA by default. */ 1292 unsigned rela_plts_and_copies_p : 1; 1293 1294 /* Set if RELA relocations for a relocatable link can be handled by 1295 generic code. Backends that set this flag need do nothing in the 1296 backend relocate_section routine for relocatable linking. */ 1297 unsigned rela_normal : 1; 1298 1299 /* TRUE if addresses "naturally" sign extend. This is used when 1300 swapping in from Elf32 when BFD64. */ 1301 unsigned sign_extend_vma : 1; 1302 1303 unsigned want_got_plt : 1; 1304 unsigned plt_readonly : 1; 1305 unsigned want_plt_sym : 1; 1306 unsigned plt_not_loaded : 1; 1307 unsigned plt_alignment : 4; 1308 unsigned can_gc_sections : 1; 1309 unsigned can_refcount : 1; 1310 unsigned want_got_sym : 1; 1311 unsigned want_dynbss : 1; 1312 1313 /* Targets which do not support physical addressing often require 1314 that the p_paddr field in the section header to be set to zero. 1315 This field indicates whether this behavior is required. */ 1316 unsigned want_p_paddr_set_to_zero : 1; 1317 1318 /* True if an object file lacking a .note.GNU-stack section 1319 should be assumed to be requesting exec stack. At least one 1320 other file in the link needs to have a .note.GNU-stack section 1321 for a PT_GNU_STACK segment to be created. */ 1322 unsigned default_execstack : 1; 1323 }; 1324 1325 /* Information about reloc sections associated with a bfd_elf_section_data 1326 structure. */ 1327 struct bfd_elf_section_reloc_data 1328 { 1329 /* The ELF header for the reloc section associated with this 1330 section, if any. */ 1331 Elf_Internal_Shdr *hdr; 1332 /* The number of relocations currently assigned to HDR. */ 1333 unsigned int count; 1334 /* The ELF section number of the reloc section. Only used for an 1335 output file. */ 1336 int idx; 1337 /* Used by the backend linker to store the symbol hash table entries 1338 associated with relocs against global symbols. */ 1339 struct elf_link_hash_entry **hashes; 1340 }; 1341 1342 /* Information stored for each BFD section in an ELF file. This 1343 structure is allocated by elf_new_section_hook. */ 1344 1345 struct bfd_elf_section_data 1346 { 1347 /* The ELF header for this section. */ 1348 Elf_Internal_Shdr this_hdr; 1349 1350 /* Information about the REL and RELA reloc sections associated 1351 with this section, if any. */ 1352 struct bfd_elf_section_reloc_data rel, rela; 1353 1354 /* The ELF section number of this section. */ 1355 int this_idx; 1356 1357 /* Used by the backend linker when generating a shared library to 1358 record the dynamic symbol index for a section symbol 1359 corresponding to this section. A value of 0 means that there is 1360 no dynamic symbol for this section. */ 1361 int dynindx; 1362 1363 /* A pointer to the linked-to section for SHF_LINK_ORDER. */ 1364 asection *linked_to; 1365 1366 /* A pointer to the swapped relocs. If the section uses REL relocs, 1367 rather than RELA, all the r_addend fields will be zero. This 1368 pointer may be NULL. It is used by the backend linker. */ 1369 Elf_Internal_Rela *relocs; 1370 1371 /* A pointer to a linked list tracking dynamic relocs copied for 1372 local symbols. */ 1373 void *local_dynrel; 1374 1375 /* A pointer to the bfd section used for dynamic relocs. */ 1376 asection *sreloc; 1377 1378 union { 1379 /* Group name, if this section is a member of a group. */ 1380 const char *name; 1381 1382 /* Group signature sym, if this is the SHT_GROUP section. */ 1383 struct bfd_symbol *id; 1384 } group; 1385 1386 /* For a member of a group, points to the SHT_GROUP section. 1387 NULL for the SHT_GROUP section itself and non-group sections. */ 1388 asection *sec_group; 1389 1390 /* A linked list of member sections in the group. Circular when used by 1391 the linker. For the SHT_GROUP section, points at first member. */ 1392 asection *next_in_group; 1393 1394 /* The FDEs associated with this section. The u.fde.next_in_section 1395 field acts as a chain pointer. */ 1396 struct eh_cie_fde *fde_list; 1397 1398 /* A pointer used for various section optimizations. */ 1399 void *sec_info; 1400 }; 1401 1402 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) 1403 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) 1404 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) 1405 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) 1406 #define elf_group_name(sec) (elf_section_data(sec)->group.name) 1407 #define elf_group_id(sec) (elf_section_data(sec)->group.id) 1408 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) 1409 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list) 1410 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group) 1411 1412 #define xvec_get_elf_backend_data(xvec) \ 1413 ((const struct elf_backend_data *) (xvec)->backend_data) 1414 1415 #define get_elf_backend_data(abfd) \ 1416 xvec_get_elf_backend_data ((abfd)->xvec) 1417 1418 /* The least object attributes (within an attributes subsection) known 1419 for any target. Some code assumes that the value 0 is not used and 1420 the field for that attribute can instead be used as a marker to 1421 indicate that attributes have been initialized. */ 1422 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2 1423 1424 /* The maximum number of known object attributes for any target. */ 1425 #define NUM_KNOWN_OBJ_ATTRIBUTES 71 1426 1427 /* The value of an object attribute. The type indicates whether the attribute 1428 holds and integer, a string, or both. It can also indicate that there can 1429 be no default (i.e. all values must be written to file, even zero). */ 1430 1431 typedef struct obj_attribute 1432 { 1433 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0) 1434 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1) 1435 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2) 1436 1437 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL) 1438 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL) 1439 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT) 1440 1441 int type; 1442 unsigned int i; 1443 char *s; 1444 } obj_attribute; 1445 1446 typedef struct obj_attribute_list 1447 { 1448 struct obj_attribute_list *next; 1449 int tag; 1450 obj_attribute attr; 1451 } obj_attribute_list; 1452 1453 /* Object attributes may either be defined by the processor ABI, index 1454 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific 1455 (and possibly also processor-specific), index OBJ_ATTR_GNU. */ 1456 #define OBJ_ATTR_PROC 0 1457 #define OBJ_ATTR_GNU 1 1458 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC 1459 #define OBJ_ATTR_LAST OBJ_ATTR_GNU 1460 1461 /* The following object attribute tags are taken as generic, for all 1462 targets and for "gnu" where there is no target standard. */ 1463 enum 1464 { 1465 Tag_NULL = 0, 1466 Tag_File = 1, 1467 Tag_Section = 2, 1468 Tag_Symbol = 3, 1469 Tag_compatibility = 32 1470 }; 1471 1472 /* Some private data is stashed away for future use using the tdata pointer 1473 in the bfd structure. */ 1474 1475 struct elf_obj_tdata 1476 { 1477 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ 1478 Elf_Internal_Shdr **elf_sect_ptr; 1479 Elf_Internal_Phdr *phdr; 1480 struct elf_segment_map *segment_map; 1481 struct elf_strtab_hash *strtab_ptr; 1482 int num_locals; 1483 int num_globals; 1484 unsigned int num_elf_sections; /* elf_sect_ptr size */ 1485 int num_section_syms; 1486 asymbol **section_syms; /* STT_SECTION symbols for each section */ 1487 Elf_Internal_Shdr symtab_hdr; 1488 Elf_Internal_Shdr shstrtab_hdr; 1489 Elf_Internal_Shdr strtab_hdr; 1490 Elf_Internal_Shdr dynsymtab_hdr; 1491 Elf_Internal_Shdr dynstrtab_hdr; 1492 Elf_Internal_Shdr dynversym_hdr; 1493 Elf_Internal_Shdr dynverref_hdr; 1494 Elf_Internal_Shdr dynverdef_hdr; 1495 Elf_Internal_Shdr symtab_shndx_hdr; 1496 unsigned int symtab_section, shstrtab_section; 1497 unsigned int strtab_section, dynsymtab_section; 1498 unsigned int symtab_shndx_section; 1499 unsigned int dynversym_section, dynverdef_section, dynverref_section; 1500 file_ptr next_file_pos; 1501 bfd_vma gp; /* The gp value */ 1502 unsigned int gp_size; /* The gp size */ 1503 1504 /* Information grabbed from an elf core file. */ 1505 int core_signal; 1506 int core_pid; 1507 int core_lwpid; 1508 char* core_program; 1509 char* core_command; 1510 1511 /* A mapping from external symbols to entries in the linker hash 1512 table, used when linking. This is indexed by the symbol index 1513 minus the sh_info field of the symbol table header. */ 1514 struct elf_link_hash_entry **sym_hashes; 1515 1516 /* Track usage and final offsets of GOT entries for local symbols. 1517 This array is indexed by symbol index. Elements are used 1518 identically to "got" in struct elf_link_hash_entry. */ 1519 union 1520 { 1521 bfd_signed_vma *refcounts; 1522 bfd_vma *offsets; 1523 struct got_entry **ents; 1524 } local_got; 1525 1526 /* The linker ELF emulation code needs to let the backend ELF linker 1527 know what filename should be used for a dynamic object if the 1528 dynamic object is found using a search. The emulation code then 1529 sometimes needs to know what name was actually used. Until the 1530 file has been added to the linker symbol table, this field holds 1531 the name the linker wants. After it has been added, it holds the 1532 name actually used, which will be the DT_SONAME entry if there is 1533 one. */ 1534 const char *dt_name; 1535 1536 /* The linker emulation needs to know what audit libs 1537 are used by a dynamic object. */ 1538 const char *dt_audit; 1539 1540 /* Records the result of `get_program_header_size'. */ 1541 bfd_size_type program_header_size; 1542 1543 /* Used by find_nearest_line entry point. */ 1544 void *line_info; 1545 1546 /* Used by MIPS ELF find_nearest_line entry point. The structure 1547 could be included directly in this one, but there's no point to 1548 wasting the memory just for the infrequently called 1549 find_nearest_line. */ 1550 struct mips_elf_find_line *find_line_info; 1551 1552 /* A place to stash dwarf1 info for this bfd. */ 1553 struct dwarf1_debug *dwarf1_find_line_info; 1554 1555 /* A place to stash dwarf2 info for this bfd. */ 1556 void *dwarf2_find_line_info; 1557 1558 /* An array of stub sections indexed by symbol number, used by the 1559 MIPS ELF linker. FIXME: We should figure out some way to only 1560 include this field for a MIPS ELF target. */ 1561 asection **local_stubs; 1562 asection **local_call_stubs; 1563 1564 /* Used to determine if PT_GNU_EH_FRAME segment header should be 1565 created. */ 1566 asection *eh_frame_hdr; 1567 1568 Elf_Internal_Shdr **group_sect_ptr; 1569 int num_group; 1570 1571 /* Number of symbol version definitions we are about to emit. */ 1572 unsigned int cverdefs; 1573 1574 /* Number of symbol version references we are about to emit. */ 1575 unsigned int cverrefs; 1576 1577 /* Segment flags for the PT_GNU_STACK segment. */ 1578 unsigned int stack_flags; 1579 1580 /* Symbol version definitions in external objects. */ 1581 Elf_Internal_Verdef *verdef; 1582 1583 /* Symbol version references to external objects. */ 1584 Elf_Internal_Verneed *verref; 1585 1586 /* The Irix 5 support uses two virtual sections, which represent 1587 text/data symbols defined in dynamic objects. */ 1588 asymbol *elf_data_symbol; 1589 asymbol *elf_text_symbol; 1590 asection *elf_data_section; 1591 asection *elf_text_section; 1592 1593 /* A pointer to the .eh_frame section. */ 1594 asection *eh_frame_section; 1595 1596 /* Whether a dyanmic object was specified normally on the linker 1597 command line, or was specified when --as-needed was in effect, 1598 or was found via a DT_NEEDED entry. */ 1599 enum dynamic_lib_link_class dyn_lib_class; 1600 1601 /* This is set to TRUE if the object was created by the backend 1602 linker. */ 1603 bfd_boolean linker; 1604 1605 /* Irix 5 often screws up the symbol table, sorting local symbols 1606 after global symbols. This flag is set if the symbol table in 1607 this BFD appears to be screwed up. If it is, we ignore the 1608 sh_info field in the symbol table header, and always read all the 1609 symbols. */ 1610 bfd_boolean bad_symtab; 1611 1612 /* Used to determine if the e_flags field has been initialized */ 1613 bfd_boolean flags_init; 1614 1615 /* Symbol buffer. */ 1616 void *symbuf; 1617 1618 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES]; 1619 obj_attribute_list *other_obj_attributes[2]; 1620 1621 /* Called at the end of _bfd_elf_write_object_contents if not NULL. */ 1622 bfd_boolean (*after_write_object_contents) (bfd *); 1623 void *after_write_object_contents_info; 1624 1625 /* NT_GNU_BUILD_ID note type. */ 1626 bfd_size_type build_id_size; 1627 bfd_byte *build_id; 1628 1629 /* True if the bfd contains symbols that have the STT_GNU_IFUNC 1630 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi 1631 field in the ELF header structure. */ 1632 bfd_boolean has_gnu_symbols; 1633 1634 /* An identifier used to distinguish different target 1635 specific extensions to this structure. */ 1636 enum elf_target_id object_id; 1637 }; 1638 1639 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) 1640 1641 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id) 1642 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size) 1643 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) 1644 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) 1645 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) 1646 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) 1647 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) 1648 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) 1649 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr) 1650 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) 1651 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section) 1652 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section) 1653 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section) 1654 #define elf_eh_frame_section(bfd) \ 1655 (elf_tdata(bfd) -> eh_frame_section) 1656 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals) 1657 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) 1658 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) 1659 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms) 1660 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) 1661 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) 1662 #define elf_gp(bfd) (elf_tdata(bfd) -> gp) 1663 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) 1664 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) 1665 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) 1666 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) 1667 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) 1668 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) 1669 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit) 1670 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) 1671 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) 1672 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init) 1673 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes) 1674 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes) 1675 #define elf_known_obj_attributes_proc(bfd) \ 1676 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1677 #define elf_other_obj_attributes_proc(bfd) \ 1678 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC]) 1679 1680 extern void _bfd_elf_swap_verdef_in 1681 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); 1682 extern void _bfd_elf_swap_verdef_out 1683 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); 1684 extern void _bfd_elf_swap_verdaux_in 1685 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); 1686 extern void _bfd_elf_swap_verdaux_out 1687 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); 1688 extern void _bfd_elf_swap_verneed_in 1689 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); 1690 extern void _bfd_elf_swap_verneed_out 1691 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); 1692 extern void _bfd_elf_swap_vernaux_in 1693 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); 1694 extern void _bfd_elf_swap_vernaux_out 1695 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); 1696 extern void _bfd_elf_swap_versym_in 1697 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); 1698 extern void _bfd_elf_swap_versym_out 1699 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); 1700 1701 extern unsigned int _bfd_elf_section_from_bfd_section 1702 (bfd *, asection *); 1703 extern char *bfd_elf_string_from_elf_section 1704 (bfd *, unsigned, unsigned); 1705 extern Elf_Internal_Sym *bfd_elf_get_elf_syms 1706 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, 1707 Elf_External_Sym_Shndx *); 1708 extern const char *bfd_elf_sym_name 1709 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); 1710 1711 extern bfd_boolean _bfd_elf_copy_private_bfd_data 1712 (bfd *, bfd *); 1713 extern bfd_boolean _bfd_elf_print_private_bfd_data 1714 (bfd *, void *); 1715 extern void bfd_elf_print_symbol 1716 (bfd *, void *, asymbol *, bfd_print_symbol_type); 1717 1718 extern unsigned int _bfd_elf_eh_frame_address_size 1719 (bfd *, asection *); 1720 extern bfd_byte _bfd_elf_encode_eh_address 1721 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, 1722 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); 1723 extern bfd_boolean _bfd_elf_can_make_relative 1724 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); 1725 1726 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class 1727 (const Elf_Internal_Rela *); 1728 extern bfd_vma _bfd_elf_rela_local_sym 1729 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); 1730 extern bfd_vma _bfd_elf_rel_local_sym 1731 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); 1732 extern bfd_vma _bfd_elf_section_offset 1733 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1734 1735 extern unsigned long bfd_elf_hash 1736 (const char *); 1737 extern unsigned long bfd_elf_gnu_hash 1738 (const char *); 1739 1740 extern bfd_reloc_status_type bfd_elf_generic_reloc 1741 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 1742 extern bfd_boolean bfd_elf_allocate_object 1743 (bfd *, size_t, enum elf_target_id); 1744 extern bfd_boolean bfd_elf_make_object 1745 (bfd *); 1746 extern bfd_boolean bfd_elf_mkcorefile 1747 (bfd *); 1748 extern bfd_boolean _bfd_elf_make_section_from_shdr 1749 (bfd *, Elf_Internal_Shdr *, const char *, int); 1750 extern bfd_boolean _bfd_elf_make_section_from_phdr 1751 (bfd *, Elf_Internal_Phdr *, int, const char *); 1752 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc 1753 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 1754 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create 1755 (bfd *); 1756 extern void _bfd_elf_link_hash_copy_indirect 1757 (struct bfd_link_info *, struct elf_link_hash_entry *, 1758 struct elf_link_hash_entry *); 1759 extern void _bfd_elf_link_hash_hide_symbol 1760 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); 1761 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol 1762 (struct bfd_link_info *, struct elf_link_hash_entry *); 1763 extern bfd_boolean _bfd_elf_link_hash_table_init 1764 (struct elf_link_hash_table *, bfd *, 1765 struct bfd_hash_entry *(*) 1766 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *), 1767 unsigned int, enum elf_target_id); 1768 extern bfd_boolean _bfd_elf_slurp_version_tables 1769 (bfd *, bfd_boolean); 1770 extern bfd_boolean _bfd_elf_merge_sections 1771 (bfd *, struct bfd_link_info *); 1772 extern bfd_boolean _bfd_elf_match_sections_by_type 1773 (bfd *, const asection *, bfd *, const asection *); 1774 extern bfd_boolean bfd_elf_is_group_section 1775 (bfd *, const struct bfd_section *); 1776 extern void _bfd_elf_section_already_linked 1777 (bfd *, struct bfd_section *, struct bfd_link_info *); 1778 extern void bfd_elf_set_group_contents 1779 (bfd *, asection *, void *); 1780 extern asection *_bfd_elf_check_kept_section 1781 (asection *, struct bfd_link_info *); 1782 extern void _bfd_elf_link_just_syms 1783 (asection *, struct bfd_link_info *); 1784 extern void _bfd_elf_copy_link_hash_symbol_type 1785 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *); 1786 extern bfd_boolean _bfd_elf_size_group_sections 1787 (struct bfd_link_info *); 1788 extern bfd_boolean _bfd_elf_fixup_group_sections 1789 (bfd *, asection *); 1790 extern bfd_boolean _bfd_elf_copy_private_header_data 1791 (bfd *, bfd *); 1792 extern bfd_boolean _bfd_elf_copy_private_symbol_data 1793 (bfd *, asymbol *, bfd *, asymbol *); 1794 #define _bfd_generic_init_private_section_data \ 1795 _bfd_elf_init_private_section_data 1796 extern bfd_boolean _bfd_elf_init_private_section_data 1797 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); 1798 extern bfd_boolean _bfd_elf_copy_private_section_data 1799 (bfd *, asection *, bfd *, asection *); 1800 extern bfd_boolean _bfd_elf_write_object_contents 1801 (bfd *); 1802 extern bfd_boolean _bfd_elf_write_corefile_contents 1803 (bfd *); 1804 extern bfd_boolean _bfd_elf_set_section_contents 1805 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 1806 extern long _bfd_elf_get_symtab_upper_bound 1807 (bfd *); 1808 extern long _bfd_elf_canonicalize_symtab 1809 (bfd *, asymbol **); 1810 extern long _bfd_elf_get_dynamic_symtab_upper_bound 1811 (bfd *); 1812 extern long _bfd_elf_canonicalize_dynamic_symtab 1813 (bfd *, asymbol **); 1814 extern long _bfd_elf_get_synthetic_symtab 1815 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 1816 extern long _bfd_elf_get_reloc_upper_bound 1817 (bfd *, sec_ptr); 1818 extern long _bfd_elf_canonicalize_reloc 1819 (bfd *, sec_ptr, arelent **, asymbol **); 1820 extern asection * _bfd_elf_get_dynamic_reloc_section 1821 (bfd *, asection *, bfd_boolean); 1822 extern asection * _bfd_elf_make_dynamic_reloc_section 1823 (asection *, bfd *, unsigned int, bfd *, bfd_boolean); 1824 extern long _bfd_elf_get_dynamic_reloc_upper_bound 1825 (bfd *); 1826 extern long _bfd_elf_canonicalize_dynamic_reloc 1827 (bfd *, arelent **, asymbol **); 1828 extern asymbol *_bfd_elf_make_empty_symbol 1829 (bfd *); 1830 extern void _bfd_elf_get_symbol_info 1831 (bfd *, asymbol *, symbol_info *); 1832 extern bfd_boolean _bfd_elf_is_local_label_name 1833 (bfd *, const char *); 1834 extern alent *_bfd_elf_get_lineno 1835 (bfd *, asymbol *); 1836 extern bfd_boolean _bfd_elf_set_arch_mach 1837 (bfd *, enum bfd_architecture, unsigned long); 1838 extern bfd_boolean _bfd_elf_find_nearest_line 1839 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, 1840 unsigned int *); 1841 extern bfd_boolean _bfd_elf_find_line 1842 (bfd *, asymbol **, asymbol *, const char **, unsigned int *); 1843 #define _bfd_generic_find_line _bfd_elf_find_line 1844 extern bfd_boolean _bfd_elf_find_inliner_info 1845 (bfd *, const char **, const char **, unsigned int *); 1846 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols 1847 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol 1848 extern int _bfd_elf_sizeof_headers 1849 (bfd *, struct bfd_link_info *); 1850 extern bfd_boolean _bfd_elf_new_section_hook 1851 (bfd *, asection *); 1852 extern bfd_boolean _bfd_elf_init_reloc_shdr 1853 (bfd *, struct bfd_elf_section_reloc_data *, asection *, bfd_boolean); 1854 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section 1855 (const char *, const struct bfd_elf_special_section *, unsigned int); 1856 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr 1857 (bfd *, asection *); 1858 1859 /* If the target doesn't have reloc handling written yet: */ 1860 extern void _bfd_elf_no_info_to_howto 1861 (bfd *, arelent *, Elf_Internal_Rela *); 1862 1863 extern bfd_boolean bfd_section_from_shdr 1864 (bfd *, unsigned int shindex); 1865 extern bfd_boolean bfd_section_from_phdr 1866 (bfd *, Elf_Internal_Phdr *, int); 1867 1868 extern int _bfd_elf_symbol_from_bfd_symbol 1869 (bfd *, asymbol **); 1870 1871 extern Elf_Internal_Sym *bfd_sym_from_r_symndx 1872 (struct sym_cache *, bfd *, unsigned long); 1873 extern asection *bfd_section_from_elf_index 1874 (bfd *, unsigned int); 1875 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init 1876 (void); 1877 1878 extern struct elf_strtab_hash * _bfd_elf_strtab_init 1879 (void); 1880 extern void _bfd_elf_strtab_free 1881 (struct elf_strtab_hash *); 1882 extern bfd_size_type _bfd_elf_strtab_add 1883 (struct elf_strtab_hash *, const char *, bfd_boolean); 1884 extern void _bfd_elf_strtab_addref 1885 (struct elf_strtab_hash *, bfd_size_type); 1886 extern void _bfd_elf_strtab_delref 1887 (struct elf_strtab_hash *, bfd_size_type); 1888 extern void _bfd_elf_strtab_clear_all_refs 1889 (struct elf_strtab_hash *); 1890 extern bfd_size_type _bfd_elf_strtab_size 1891 (struct elf_strtab_hash *); 1892 extern bfd_size_type _bfd_elf_strtab_offset 1893 (struct elf_strtab_hash *, bfd_size_type); 1894 extern bfd_boolean _bfd_elf_strtab_emit 1895 (bfd *, struct elf_strtab_hash *); 1896 extern void _bfd_elf_strtab_finalize 1897 (struct elf_strtab_hash *); 1898 1899 extern void _bfd_elf_begin_eh_frame_parsing 1900 (struct bfd_link_info *info); 1901 extern void _bfd_elf_parse_eh_frame 1902 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *); 1903 extern void _bfd_elf_end_eh_frame_parsing 1904 (struct bfd_link_info *info); 1905 1906 extern bfd_boolean _bfd_elf_discard_section_eh_frame 1907 (bfd *, struct bfd_link_info *, asection *, 1908 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); 1909 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr 1910 (bfd *, struct bfd_link_info *); 1911 extern bfd_vma _bfd_elf_eh_frame_section_offset 1912 (bfd *, struct bfd_link_info *, asection *, bfd_vma); 1913 extern bfd_boolean _bfd_elf_write_section_eh_frame 1914 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 1915 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr 1916 (bfd *, struct bfd_link_info *); 1917 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr 1918 (struct bfd_link_info *); 1919 1920 extern bfd_boolean _bfd_elf_merge_symbol 1921 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, 1922 asection **, bfd_vma *, unsigned int *, 1923 struct elf_link_hash_entry **, bfd_boolean *, 1924 bfd_boolean *, bfd_boolean *, bfd_boolean *); 1925 1926 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); 1927 1928 extern long _bfd_elf_link_lookup_local_dynindx 1929 (struct bfd_link_info *, bfd *, long); 1930 extern bfd_boolean _bfd_elf_compute_section_file_positions 1931 (bfd *, struct bfd_link_info *); 1932 extern void _bfd_elf_assign_file_positions_for_relocs 1933 (bfd *); 1934 extern file_ptr _bfd_elf_assign_file_position_for_section 1935 (Elf_Internal_Shdr *, file_ptr, bfd_boolean); 1936 1937 extern bfd_boolean _bfd_elf_validate_reloc 1938 (bfd *, arelent *); 1939 1940 extern bfd_boolean _bfd_elf_link_create_dynamic_sections 1941 (bfd *, struct bfd_link_info *); 1942 extern bfd_boolean _bfd_elf_link_omit_section_dynsym 1943 (bfd *, struct bfd_link_info *, asection *); 1944 extern bfd_boolean _bfd_elf_create_dynamic_sections 1945 (bfd *, struct bfd_link_info *); 1946 extern bfd_boolean _bfd_elf_create_got_section 1947 (bfd *, struct bfd_link_info *); 1948 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym 1949 (bfd *, struct bfd_link_info *, asection *, const char *); 1950 extern void _bfd_elf_init_1_index_section 1951 (bfd *, struct bfd_link_info *); 1952 extern void _bfd_elf_init_2_index_sections 1953 (bfd *, struct bfd_link_info *); 1954 1955 extern bfd_boolean _bfd_elfcore_make_pseudosection 1956 (bfd *, char *, size_t, ufile_ptr); 1957 extern char *_bfd_elfcore_strndup 1958 (bfd *, char *, size_t); 1959 1960 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs 1961 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); 1962 1963 extern bfd_boolean _bfd_elf_link_output_relocs 1964 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, 1965 struct elf_link_hash_entry **); 1966 1967 extern bfd_boolean _bfd_elf_adjust_dynamic_copy 1968 (struct elf_link_hash_entry *, asection *); 1969 1970 extern bfd_boolean _bfd_elf_dynamic_symbol_p 1971 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1972 1973 extern bfd_boolean _bfd_elf_symbol_refs_local_p 1974 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); 1975 1976 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation 1977 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma); 1978 1979 extern bfd_boolean _bfd_elf_setup_sections 1980 (bfd *); 1981 1982 extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *); 1983 1984 extern const bfd_target *bfd_elf32_object_p 1985 (bfd *); 1986 extern const bfd_target *bfd_elf32_core_file_p 1987 (bfd *); 1988 extern char *bfd_elf32_core_file_failing_command 1989 (bfd *); 1990 extern int bfd_elf32_core_file_failing_signal 1991 (bfd *); 1992 extern bfd_boolean bfd_elf32_core_file_matches_executable_p 1993 (bfd *, bfd *); 1994 extern int bfd_elf32_core_file_pid 1995 (bfd *); 1996 1997 extern bfd_boolean bfd_elf32_swap_symbol_in 1998 (bfd *, const void *, const void *, Elf_Internal_Sym *); 1999 extern void bfd_elf32_swap_symbol_out 2000 (bfd *, const Elf_Internal_Sym *, void *, void *); 2001 extern void bfd_elf32_swap_reloc_in 2002 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2003 extern void bfd_elf32_swap_reloc_out 2004 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2005 extern void bfd_elf32_swap_reloca_in 2006 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2007 extern void bfd_elf32_swap_reloca_out 2008 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2009 extern void bfd_elf32_swap_phdr_in 2010 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); 2011 extern void bfd_elf32_swap_phdr_out 2012 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); 2013 extern void bfd_elf32_swap_dyn_in 2014 (bfd *, const void *, Elf_Internal_Dyn *); 2015 extern void bfd_elf32_swap_dyn_out 2016 (bfd *, const Elf_Internal_Dyn *, void *); 2017 extern long bfd_elf32_slurp_symbol_table 2018 (bfd *, asymbol **, bfd_boolean); 2019 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr 2020 (bfd *); 2021 extern int bfd_elf32_write_out_phdrs 2022 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2023 extern bfd_boolean bfd_elf32_checksum_contents 2024 (bfd * , void (*) (const void *, size_t, void *), void *); 2025 extern void bfd_elf32_write_relocs 2026 (bfd *, asection *, void *); 2027 extern bfd_boolean bfd_elf32_slurp_reloc_table 2028 (bfd *, asection *, asymbol **, bfd_boolean); 2029 2030 extern const bfd_target *bfd_elf64_object_p 2031 (bfd *); 2032 extern const bfd_target *bfd_elf64_core_file_p 2033 (bfd *); 2034 extern char *bfd_elf64_core_file_failing_command 2035 (bfd *); 2036 extern int bfd_elf64_core_file_failing_signal 2037 (bfd *); 2038 extern bfd_boolean bfd_elf64_core_file_matches_executable_p 2039 (bfd *, bfd *); 2040 extern int bfd_elf64_core_file_pid 2041 (bfd *); 2042 2043 extern bfd_boolean bfd_elf64_swap_symbol_in 2044 (bfd *, const void *, const void *, Elf_Internal_Sym *); 2045 extern void bfd_elf64_swap_symbol_out 2046 (bfd *, const Elf_Internal_Sym *, void *, void *); 2047 extern void bfd_elf64_swap_reloc_in 2048 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2049 extern void bfd_elf64_swap_reloc_out 2050 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2051 extern void bfd_elf64_swap_reloca_in 2052 (bfd *, const bfd_byte *, Elf_Internal_Rela *); 2053 extern void bfd_elf64_swap_reloca_out 2054 (bfd *, const Elf_Internal_Rela *, bfd_byte *); 2055 extern void bfd_elf64_swap_phdr_in 2056 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); 2057 extern void bfd_elf64_swap_phdr_out 2058 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); 2059 extern void bfd_elf64_swap_dyn_in 2060 (bfd *, const void *, Elf_Internal_Dyn *); 2061 extern void bfd_elf64_swap_dyn_out 2062 (bfd *, const Elf_Internal_Dyn *, void *); 2063 extern long bfd_elf64_slurp_symbol_table 2064 (bfd *, asymbol **, bfd_boolean); 2065 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr 2066 (bfd *); 2067 extern int bfd_elf64_write_out_phdrs 2068 (bfd *, const Elf_Internal_Phdr *, unsigned int); 2069 extern bfd_boolean bfd_elf64_checksum_contents 2070 (bfd * , void (*) (const void *, size_t, void *), void *); 2071 extern void bfd_elf64_write_relocs 2072 (bfd *, asection *, void *); 2073 extern bfd_boolean bfd_elf64_slurp_reloc_table 2074 (bfd *, asection *, asymbol **, bfd_boolean); 2075 2076 extern bfd_boolean _bfd_elf_default_relocs_compatible 2077 (const bfd_target *, const bfd_target *); 2078 2079 extern bfd_boolean _bfd_elf_relocs_compatible 2080 (const bfd_target *, const bfd_target *); 2081 2082 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup 2083 (bfd *, struct bfd_link_info *, const char *); 2084 extern bfd_boolean bfd_elf_link_add_symbols 2085 (bfd *, struct bfd_link_info *); 2086 extern bfd_boolean _bfd_elf_add_dynamic_entry 2087 (struct bfd_link_info *, bfd_vma, bfd_vma); 2088 2089 extern bfd_boolean bfd_elf_link_record_dynamic_symbol 2090 (struct bfd_link_info *, struct elf_link_hash_entry *); 2091 2092 extern int bfd_elf_link_record_local_dynamic_symbol 2093 (struct bfd_link_info *, bfd *, long); 2094 2095 extern bfd_boolean _bfd_elf_close_and_cleanup 2096 (bfd *); 2097 2098 extern bfd_boolean _bfd_elf_common_definition 2099 (Elf_Internal_Sym *); 2100 2101 extern unsigned int _bfd_elf_common_section_index 2102 (asection *); 2103 2104 extern asection *_bfd_elf_common_section 2105 (asection *); 2106 2107 extern void _bfd_dwarf2_cleanup_debug_info 2108 (bfd *); 2109 2110 extern bfd_vma _bfd_elf_default_got_elt_size 2111 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *, 2112 unsigned long); 2113 2114 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 2115 (bfd *, arelent *, struct bfd_symbol *, void *, 2116 asection *, bfd *, char **); 2117 2118 extern bfd_boolean bfd_elf_final_link 2119 (bfd *, struct bfd_link_info *); 2120 2121 extern void _bfd_elf_gc_keep 2122 (struct bfd_link_info *info); 2123 2124 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol 2125 (struct elf_link_hash_entry *h, void *inf); 2126 2127 extern bfd_boolean bfd_elf_gc_sections 2128 (bfd *, struct bfd_link_info *); 2129 2130 extern bfd_boolean bfd_elf_gc_record_vtinherit 2131 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2132 2133 extern bfd_boolean bfd_elf_gc_record_vtentry 2134 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); 2135 2136 extern asection *_bfd_elf_gc_mark_hook 2137 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 2138 struct elf_link_hash_entry *, Elf_Internal_Sym *); 2139 2140 extern asection *_bfd_elf_gc_mark_rsec 2141 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2142 struct elf_reloc_cookie *); 2143 2144 extern bfd_boolean _bfd_elf_gc_mark_reloc 2145 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, 2146 struct elf_reloc_cookie *); 2147 2148 extern bfd_boolean _bfd_elf_gc_mark_fdes 2149 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn, 2150 struct elf_reloc_cookie *); 2151 2152 extern bfd_boolean _bfd_elf_gc_mark 2153 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn); 2154 2155 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets 2156 (bfd *, struct bfd_link_info *); 2157 2158 extern bfd_boolean bfd_elf_gc_common_final_link 2159 (bfd *, struct bfd_link_info *); 2160 2161 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p 2162 (bfd_vma, void *); 2163 2164 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment 2165 (bfd *, asection *); 2166 2167 extern bfd_boolean _bfd_elf_map_sections_to_segments 2168 (bfd *, struct bfd_link_info *); 2169 2170 extern bfd_boolean _bfd_elf_is_function_type (unsigned int); 2171 2172 extern int bfd_elf_get_default_section_type (flagword); 2173 2174 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section 2175 (bfd * abfd, asection * section); 2176 2177 /* Exported interface for writing elf corefile notes. */ 2178 extern char *elfcore_write_note 2179 (bfd *, char *, int *, const char *, int, const void *, int); 2180 extern char *elfcore_write_prpsinfo 2181 (bfd *, char *, int *, const char *, const char *); 2182 extern char *elfcore_write_prstatus 2183 (bfd *, char *, int *, long, int, const void *); 2184 extern char * elfcore_write_pstatus 2185 (bfd *, char *, int *, long, int, const void *); 2186 extern char *elfcore_write_prfpreg 2187 (bfd *, char *, int *, const void *, int); 2188 extern char *elfcore_write_prxfpreg 2189 (bfd *, char *, int *, const void *, int); 2190 extern char *elfcore_write_xstatereg 2191 (bfd *, char *, int *, const void *, int); 2192 extern char *elfcore_write_ppc_vmx 2193 (bfd *, char *, int *, const void *, int); 2194 extern char *elfcore_write_ppc_vsx 2195 (bfd *, char *, int *, const void *, int); 2196 extern char *elfcore_write_s390_timer 2197 (bfd *, char *, int *, const void *, int); 2198 extern char *elfcore_write_s390_todcmp 2199 (bfd *, char *, int *, const void *, int); 2200 extern char *elfcore_write_s390_todpreg 2201 (bfd *, char *, int *, const void *, int); 2202 extern char *elfcore_write_s390_ctrs 2203 (bfd *, char *, int *, const void *, int); 2204 extern char *elfcore_write_s390_prefix 2205 (bfd *, char *, int *, const void *, int); 2206 extern char *elfcore_write_lwpstatus 2207 (bfd *, char *, int *, long, int, const void *); 2208 extern char *elfcore_write_register_note 2209 (bfd *, char *, int *, const char *, const void *, int); 2210 2211 extern bfd *_bfd_elf32_bfd_from_remote_memory 2212 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2213 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 2214 extern bfd *_bfd_elf64_bfd_from_remote_memory 2215 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, 2216 int (*target_read_memory) (bfd_vma, bfd_byte *, int)); 2217 2218 extern bfd_vma bfd_elf_obj_attr_size (bfd *); 2219 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma); 2220 extern int bfd_elf_get_obj_attr_int (bfd *, int, int); 2221 extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int); 2222 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \ 2223 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2224 extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *); 2225 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \ 2226 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) 2227 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int, 2228 const char *); 2229 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \ 2230 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \ 2231 (INTVAL), (STRVAL)) 2232 2233 extern char *_bfd_elf_attr_strdup (bfd *, const char *); 2234 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *); 2235 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int); 2236 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *); 2237 extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *); 2238 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int); 2239 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *); 2240 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec); 2241 2242 /* The linker may needs to keep track of the number of relocs that it 2243 decides to copy as dynamic relocs in check_relocs for each symbol. 2244 This is so that it can later discard them if they are found to be 2245 unnecessary. We can store the information in a field extending the 2246 regular ELF linker hash table. */ 2247 2248 struct elf_dyn_relocs 2249 { 2250 struct elf_dyn_relocs *next; 2251 2252 /* The input section of the reloc. */ 2253 asection *sec; 2254 2255 /* Total number of relocs copied for the input section. */ 2256 bfd_size_type count; 2257 2258 /* Number of pc-relative relocs copied for the input section. */ 2259 bfd_size_type pc_count; 2260 }; 2261 2262 extern bfd_boolean _bfd_elf_create_ifunc_sections 2263 (bfd *, struct bfd_link_info *); 2264 extern asection * _bfd_elf_create_ifunc_dyn_reloc 2265 (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc, 2266 struct elf_dyn_relocs **); 2267 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs 2268 (struct bfd_link_info *, struct elf_link_hash_entry *, 2269 struct elf_dyn_relocs **, unsigned int, unsigned int); 2270 2271 /* Large common section. */ 2272 extern asection _bfd_elf_large_com_section; 2273 2274 /* Hash for local symbol with the first section id, ID, in the input 2275 file and the local symbol index, SYM. */ 2276 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \ 2277 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \ 2278 ^ (SYM) ^ ((ID) >> 16)) 2279 2280 /* This is the condition under which finish_dynamic_symbol will be called. 2281 If our finish_dynamic_symbol isn't called, we'll need to do something 2282 about initializing any .plt and .got entries in relocate_section. */ 2283 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ 2284 ((DYN) \ 2285 && ((SHARED) || !(H)->forced_local) \ 2286 && ((H)->dynindx != -1 || (H)->forced_local)) 2287 2288 /* This macro is to avoid lots of duplicated code in the body 2289 of xxx_relocate_section() in the various elfxx-xxxx.c files. */ 2290 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ 2291 r_symndx, symtab_hdr, sym_hashes, \ 2292 h, sec, relocation, \ 2293 unresolved_reloc, warned) \ 2294 do \ 2295 { \ 2296 /* It seems this can happen with erroneous or unsupported \ 2297 input (mixing a.out and elf in an archive, for example.) */ \ 2298 if (sym_hashes == NULL) \ 2299 return FALSE; \ 2300 \ 2301 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ 2302 \ 2303 while (h->root.type == bfd_link_hash_indirect \ 2304 || h->root.type == bfd_link_hash_warning) \ 2305 h = (struct elf_link_hash_entry *) h->root.u.i.link; \ 2306 \ 2307 warned = FALSE; \ 2308 unresolved_reloc = FALSE; \ 2309 relocation = 0; \ 2310 if (h->root.type == bfd_link_hash_defined \ 2311 || h->root.type == bfd_link_hash_defweak) \ 2312 { \ 2313 sec = h->root.u.def.section; \ 2314 if (sec == NULL \ 2315 || sec->output_section == NULL) \ 2316 /* Set a flag that will be cleared later if we find a \ 2317 relocation value for this symbol. output_section \ 2318 is typically NULL for symbols satisfied by a shared \ 2319 library. */ \ 2320 unresolved_reloc = TRUE; \ 2321 else \ 2322 relocation = (h->root.u.def.value \ 2323 + sec->output_section->vma \ 2324 + sec->output_offset); \ 2325 } \ 2326 else if (h->root.type == bfd_link_hash_undefweak) \ 2327 ; \ 2328 else if (info->unresolved_syms_in_objects == RM_IGNORE \ 2329 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ 2330 ; \ 2331 else if (!info->relocatable) \ 2332 { \ 2333 bfd_boolean err; \ 2334 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ 2335 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ 2336 if (!info->callbacks->undefined_symbol (info, \ 2337 h->root.root.string, \ 2338 input_bfd, \ 2339 input_section, \ 2340 rel->r_offset, err)) \ 2341 return FALSE; \ 2342 warned = TRUE; \ 2343 } \ 2344 (void) unresolved_reloc; \ 2345 (void) warned; \ 2346 } \ 2347 while (0) 2348 2349 /* This macro is to avoid lots of duplicated code in the body of the 2350 loop over relocations in xxx_relocate_section() in the various 2351 elfxx-xxxx.c files. 2352 2353 Handle relocations against symbols from removed linkonce sections, 2354 or sections discarded by a linker script. When doing a relocatable 2355 link, we remove such relocations. Otherwise, we just want the 2356 section contents zeroed and avoid any special processing. */ 2357 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ 2358 rel, relend, howto, contents) \ 2359 { \ 2360 _bfd_clear_contents (howto, input_bfd, input_section, \ 2361 contents + rel->r_offset); \ 2362 \ 2363 if (info->relocatable \ 2364 && (input_section->flags & SEC_DEBUGGING)) \ 2365 { \ 2366 /* Only remove relocations in debug sections since other \ 2367 sections may require relocations. */ \ 2368 Elf_Internal_Shdr *rel_hdr; \ 2369 \ 2370 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ 2371 \ 2372 /* Avoid empty output section. */ \ 2373 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ 2374 { \ 2375 rel_hdr->sh_size -= rel_hdr->sh_entsize; \ 2376 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ 2377 rel_hdr->sh_size -= rel_hdr->sh_entsize; \ 2378 \ 2379 memmove (rel, rel + 1, (relend - rel - 1) * sizeof (*rel)); \ 2380 \ 2381 input_section->reloc_count--; \ 2382 relend--; \ 2383 rel--; \ 2384 continue; \ 2385 } \ 2386 } \ 2387 \ 2388 rel->r_info = 0; \ 2389 rel->r_addend = 0; \ 2390 continue; \ 2391 } 2392 2393 /* Will a symbol be bound to the the definition within the shared 2394 library, if any. A unique symbol can never be bound locally. */ 2395 #define SYMBOLIC_BIND(INFO, H) \ 2396 (!(H)->unique_global \ 2397 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))) 2398 2399 #endif /* _LIBELF_H_ */ 2400