| 1 | /* BFD back-end data structures for ELF files. |
| 2 | Copyright (C) 1992, 1993 Free Software Foundation, Inc. |
| 3 | Written by Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #ifndef _LIBELF_H_ |
| 22 | #define _LIBELF_H_ 1 |
| 23 | |
| 24 | #include "elf/common.h" |
| 25 | #include "elf/internal.h" |
| 26 | #include "elf/external.h" |
| 27 | #include "bfdlink.h" |
| 28 | |
| 29 | /* If size isn't specified as 64 or 32, NAME macro should fail. */ |
| 30 | #ifndef NAME |
| 31 | #if ARCH_SIZE==64 |
| 32 | #define NAME(x,y) CAT4(x,64,_,y) |
| 33 | #endif |
| 34 | #if ARCH_SIZE==32 |
| 35 | #define NAME(x,y) CAT4(x,32,_,y) |
| 36 | #endif |
| 37 | #endif |
| 38 | |
| 39 | #ifndef NAME |
| 40 | #define NAME(x,y) CAT4(x,NOSIZE,_,y) |
| 41 | #endif |
| 42 | |
| 43 | #define ElfNAME(X) NAME(Elf,X) |
| 44 | #define elfNAME(X) NAME(elf,X) |
| 45 | |
| 46 | /* Information held for an ELF symbol. The first field is the |
| 47 | corresponding asymbol. Every symbol is an ELF file is actually a |
| 48 | pointer to this structure, although it is often handled as a |
| 49 | pointer to an asymbol. */ |
| 50 | |
| 51 | typedef struct |
| 52 | { |
| 53 | /* The BFD symbol. */ |
| 54 | asymbol symbol; |
| 55 | /* ELF symbol information. */ |
| 56 | Elf_Internal_Sym internal_elf_sym; |
| 57 | /* Backend specific information. */ |
| 58 | union |
| 59 | { |
| 60 | unsigned int hppa_arg_reloc; |
| 61 | PTR mips_extr; |
| 62 | PTR any; |
| 63 | } |
| 64 | tc_data; |
| 65 | } elf_symbol_type; |
| 66 | \f |
| 67 | /* ELF linker hash table entries. */ |
| 68 | |
| 69 | struct elf_link_hash_entry |
| 70 | { |
| 71 | struct bfd_link_hash_entry root; |
| 72 | |
| 73 | /* Symbol index in output file. This is initialized to -1. It is |
| 74 | set to -2 if the symbol is used by a reloc. */ |
| 75 | long indx; |
| 76 | |
| 77 | /* Symbol size. */ |
| 78 | bfd_size_type size; |
| 79 | |
| 80 | /* Symbol index as a dynamic symbol. Initialized to -1, and remains |
| 81 | -1 if this is not a dynamic symbol. */ |
| 82 | long dynindx; |
| 83 | |
| 84 | /* String table index in .dynstr if this is a dynamic symbol. */ |
| 85 | unsigned long dynstr_index; |
| 86 | |
| 87 | /* If this is a weak defined symbol from a dynamic object, this |
| 88 | field points to a defined symbol with the same value, if there is |
| 89 | one. Otherwise it is NULL. */ |
| 90 | struct elf_link_hash_entry *weakdef; |
| 91 | |
| 92 | /* If this symbol requires an entry in the global offset table, the |
| 93 | processor specific backend uses this field to hold the offset |
| 94 | into the .got section. If this field is -1, then the symbol does |
| 95 | not require a global offset table entry. */ |
| 96 | bfd_vma got_offset; |
| 97 | |
| 98 | /* If this symbol requires an entry in the procedure linkage table, |
| 99 | the processor specific backend uses these two fields to hold the |
| 100 | offset into the procedure linkage section and the offset into the |
| 101 | .got section. If plt_offset is -1, then the symbol does not |
| 102 | require an entry in the procedure linkage table. */ |
| 103 | bfd_vma plt_offset; |
| 104 | |
| 105 | /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */ |
| 106 | char type; |
| 107 | |
| 108 | /* Some flags; legal values follow. */ |
| 109 | unsigned char elf_link_hash_flags; |
| 110 | /* Symbol is referenced by a non-shared object. */ |
| 111 | #define ELF_LINK_HASH_REF_REGULAR 01 |
| 112 | /* Symbol is defined by a non-shared object. */ |
| 113 | #define ELF_LINK_HASH_DEF_REGULAR 02 |
| 114 | /* Symbol is referenced by a shared object. */ |
| 115 | #define ELF_LINK_HASH_REF_DYNAMIC 04 |
| 116 | /* Symbol is defined by a shared object. */ |
| 117 | #define ELF_LINK_HASH_DEF_DYNAMIC 010 |
| 118 | /* Dynamic symbol has been adjustd. */ |
| 119 | #define ELF_LINK_HASH_DYNAMIC_ADJUSTED 020 |
| 120 | /* Symbol needs a copy reloc. */ |
| 121 | #define ELF_LINK_HASH_NEEDS_COPY 040 |
| 122 | /* Symbol needs a procedure linkage table entry. */ |
| 123 | #define ELF_LINK_HASH_NEEDS_PLT 0100 |
| 124 | }; |
| 125 | |
| 126 | /* ELF linker hash table. */ |
| 127 | |
| 128 | struct elf_link_hash_table |
| 129 | { |
| 130 | struct bfd_link_hash_table root; |
| 131 | /* Whether we have created the special dynamic sections required |
| 132 | when linking against or generating a shared object. */ |
| 133 | boolean dynamic_sections_created; |
| 134 | /* The BFD used to hold special sections created by the linker. |
| 135 | This will be the first BFD found which requires these sections to |
| 136 | be created. */ |
| 137 | bfd *dynobj; |
| 138 | /* The number of symbols found in the link which must be put into |
| 139 | the .dynsym section. */ |
| 140 | size_t dynsymcount; |
| 141 | /* The string table of dynamic symbols, which becomes the .dynstr |
| 142 | section. */ |
| 143 | struct bfd_strtab_hash *dynstr; |
| 144 | /* The number of buckets in the hash table in the .hash section. |
| 145 | This is based on the number of dynamic symbols. */ |
| 146 | size_t bucketcount; |
| 147 | /* A linked list of DT_NEEDED names found in dynamic objects |
| 148 | included in the link. */ |
| 149 | struct bfd_elf_link_needed_list *needed; |
| 150 | }; |
| 151 | |
| 152 | /* Look up an entry in an ELF linker hash table. */ |
| 153 | |
| 154 | #define elf_link_hash_lookup(table, string, create, copy, follow) \ |
| 155 | ((struct elf_link_hash_entry *) \ |
| 156 | bfd_link_hash_lookup (&(table)->root, (string), (create), \ |
| 157 | (copy), (follow))) |
| 158 | |
| 159 | /* Traverse an ELF linker hash table. */ |
| 160 | |
| 161 | #define elf_link_hash_traverse(table, func, info) \ |
| 162 | (bfd_link_hash_traverse \ |
| 163 | (&(table)->root, \ |
| 164 | (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \ |
| 165 | (info))) |
| 166 | |
| 167 | /* Get the ELF linker hash table from a link_info structure. */ |
| 168 | |
| 169 | #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) |
| 170 | \f |
| 171 | /* Constant information held for an ELF backend. */ |
| 172 | |
| 173 | struct elf_size_info { |
| 174 | unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; |
| 175 | unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; |
| 176 | |
| 177 | unsigned char arch_size, file_align; |
| 178 | unsigned char elfclass, ev_current; |
| 179 | int (*write_out_phdrs) PARAMS ((bfd *, Elf_Internal_Phdr *, int)); |
| 180 | boolean (*write_shdrs_and_ehdr) PARAMS ((bfd *)); |
| 181 | void (*write_relocs) PARAMS ((bfd *, asection *, PTR)); |
| 182 | void (*swap_symbol_out) PARAMS ((bfd *, Elf_Internal_Sym *, PTR)); |
| 183 | boolean (*slurp_reloc_table) PARAMS ((bfd *, asection *, asymbol **)); |
| 184 | long (*slurp_symbol_table) PARAMS ((bfd *, asymbol **, boolean)); |
| 185 | }; |
| 186 | |
| 187 | #define elf_symbol_from(ABFD,S) \ |
| 188 | (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ |
| 189 | && (S)->the_bfd->tdata.elf_obj_data != 0) \ |
| 190 | ? (elf_symbol_type *) (S) \ |
| 191 | : 0) |
| 192 | |
| 193 | struct elf_backend_data |
| 194 | { |
| 195 | /* Whether the backend uses REL or RELA relocations. FIXME: some |
| 196 | ELF backends use both. When we need to support one, this whole |
| 197 | approach will need to be changed. */ |
| 198 | int use_rela_p; |
| 199 | |
| 200 | /* The architecture for this backend. */ |
| 201 | enum bfd_architecture arch; |
| 202 | |
| 203 | /* The ELF machine code (EM_xxxx) for this backend. */ |
| 204 | int elf_machine_code; |
| 205 | |
| 206 | /* The maximum page size for this backend. */ |
| 207 | bfd_vma maxpagesize; |
| 208 | |
| 209 | /* This is true if the linker should act like collect and gather |
| 210 | global constructors and destructors by name. This is true for |
| 211 | MIPS ELF because the Irix 5 tools can not handle the .init |
| 212 | section. */ |
| 213 | boolean collect; |
| 214 | |
| 215 | /* A function to translate an ELF RELA relocation to a BFD arelent |
| 216 | structure. */ |
| 217 | void (*elf_info_to_howto) PARAMS ((bfd *, arelent *, |
| 218 | Elf_Internal_Rela *)); |
| 219 | |
| 220 | /* A function to translate an ELF REL relocation to a BFD arelent |
| 221 | structure. */ |
| 222 | void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *, |
| 223 | Elf_Internal_Rel *)); |
| 224 | |
| 225 | /* A function to determine whether a symbol is global when |
| 226 | partitioning the symbol table into local and global symbols. |
| 227 | This should be NULL for most targets, in which case the correct |
| 228 | thing will be done. MIPS ELF, at least on the Irix 5, has |
| 229 | special requirements. */ |
| 230 | boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *)); |
| 231 | |
| 232 | /* The remaining functions are hooks which are called only if they |
| 233 | are not NULL. */ |
| 234 | |
| 235 | /* A function to permit a backend specific check on whether a |
| 236 | particular BFD format is relevant for an object file, and to |
| 237 | permit the backend to set any global information it wishes. When |
| 238 | this is called elf_elfheader is set, but anything else should be |
| 239 | used with caution. If this returns false, the check_format |
| 240 | routine will return a bfd_error_wrong_format error. */ |
| 241 | boolean (*elf_backend_object_p) PARAMS ((bfd *)); |
| 242 | |
| 243 | /* A function to do additional symbol processing when reading the |
| 244 | ELF symbol table. This is where any processor-specific special |
| 245 | section indices are handled. */ |
| 246 | void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *)); |
| 247 | |
| 248 | /* A function to do additional symbol processing after reading the |
| 249 | entire ELF symbol table. */ |
| 250 | boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *, |
| 251 | elf_symbol_type *, |
| 252 | int)); |
| 253 | |
| 254 | /* A function to do additional processing on the ELF section header |
| 255 | just before writing it out. This is used to set the flags and |
| 256 | type fields for some sections, or to actually write out data for |
| 257 | unusual sections. */ |
| 258 | boolean (*elf_backend_section_processing) PARAMS ((bfd *, |
| 259 | Elf32_Internal_Shdr *)); |
| 260 | |
| 261 | /* A function to handle unusual section types when creating BFD |
| 262 | sections from ELF sections. */ |
| 263 | boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *, |
| 264 | Elf32_Internal_Shdr *, |
| 265 | char *)); |
| 266 | |
| 267 | /* A function to set up the ELF section header for a BFD section in |
| 268 | preparation for writing it out. This is where the flags and type |
| 269 | fields are set for unusual sections. */ |
| 270 | boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *, |
| 271 | asection *)); |
| 272 | |
| 273 | /* A function to get the ELF section index for a BFD section. If |
| 274 | this returns true, the section was found. If it is a normal ELF |
| 275 | section, *RETVAL should be left unchanged. If it is not a normal |
| 276 | ELF section *RETVAL should be set to the SHN_xxxx index. */ |
| 277 | boolean (*elf_backend_section_from_bfd_section) |
| 278 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval)); |
| 279 | |
| 280 | /* If this field is not NULL, it is called by the add_symbols phase |
| 281 | of a link just before adding a symbol to the global linker hash |
| 282 | table. It may modify any of the fields as it wishes. If *NAME |
| 283 | is set to NULL, the symbol will be skipped rather than being |
| 284 | added to the hash table. This function is responsible for |
| 285 | handling all processor dependent symbol bindings and section |
| 286 | indices, and must set at least *FLAGS and *SEC for each processor |
| 287 | dependent case; failure to do so will cause a link error. */ |
| 288 | boolean (*elf_add_symbol_hook) |
| 289 | PARAMS ((bfd *abfd, struct bfd_link_info *info, |
| 290 | const Elf_Internal_Sym *, const char **name, |
| 291 | flagword *flags, asection **sec, bfd_vma *value)); |
| 292 | |
| 293 | /* If this field is not NULL, it is called by the elf_link_output_sym |
| 294 | phase of a link for each symbol which will appear in the object file. */ |
| 295 | boolean (*elf_backend_link_output_symbol_hook) |
| 296 | PARAMS ((bfd *, struct bfd_link_info *info, const char *, |
| 297 | Elf_Internal_Sym *, asection *)); |
| 298 | |
| 299 | /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend |
| 300 | linker the first time it encounters a dynamic object in the link. |
| 301 | This function must create any sections required for dynamic |
| 302 | linking. The ABFD argument is a dynamic object. The .interp, |
| 303 | .dynamic, .dynsym, .dynstr, and .hash functions have already been |
| 304 | created, and this function may modify the section flags if |
| 305 | desired. This function will normally create the .got and .plt |
| 306 | sections, but different backends have different requirements. */ |
| 307 | boolean (*elf_backend_create_dynamic_sections) |
| 308 | PARAMS ((bfd *abfd, struct bfd_link_info *info)); |
| 309 | |
| 310 | /* The CHECK_RELOCS function is called by the add_symbols phase of |
| 311 | the ELF backend linker. It is called once for each section with |
| 312 | relocs of an object file, just after the symbols for the object |
| 313 | file have been added to the global linker hash table. The |
| 314 | function must look through the relocs and do any special handling |
| 315 | required. This generally means allocating space in the global |
| 316 | offset table, and perhaps allocating space for a reloc. The |
| 317 | relocs are always passed as Rela structures; if the section |
| 318 | actually uses Rel structures, the r_addend field will always be |
| 319 | zero. */ |
| 320 | boolean (*check_relocs) |
| 321 | PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o, |
| 322 | const Elf_Internal_Rela *relocs)); |
| 323 | |
| 324 | /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend |
| 325 | linker for every symbol which is defined by a dynamic object and |
| 326 | referenced by a regular object. This is called after all the |
| 327 | input files have been seen, but before the SIZE_DYNAMIC_SECTIONS |
| 328 | function has been called. The hash table entry should be |
| 329 | bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be |
| 330 | defined in a section from a dynamic object. Dynamic object |
| 331 | sections are not included in the final link, and this function is |
| 332 | responsible for changing the value to something which the rest of |
| 333 | the link can deal with. This will normally involve adding an |
| 334 | entry to the .plt or .got or some such section, and setting the |
| 335 | symbol to point to that. */ |
| 336 | boolean (*elf_backend_adjust_dynamic_symbol) |
| 337 | PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h)); |
| 338 | |
| 339 | /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend |
| 340 | linker after all the linker input files have been seen but before |
| 341 | the sections sizes have been set. This is called after |
| 342 | ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols. |
| 343 | It is only called when linking against a dynamic object. It must |
| 344 | set the sizes of the dynamic sections, and may fill in their |
| 345 | contents as well. The generic ELF linker can handle the .dynsym, |
| 346 | .dynstr and .hash sections. This function must handle the |
| 347 | .interp section and any sections created by the |
| 348 | CREATE_DYNAMIC_SECTIONS entry point. */ |
| 349 | boolean (*elf_backend_size_dynamic_sections) |
| 350 | PARAMS ((bfd *output_bfd, struct bfd_link_info *info)); |
| 351 | |
| 352 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 353 | to handle the relocations for a section. |
| 354 | |
| 355 | The relocs are always passed as Rela structures; if the section |
| 356 | actually uses Rel structures, the r_addend field will always be |
| 357 | zero. |
| 358 | |
| 359 | This function is responsible for adjust the section contents as |
| 360 | necessary, and (if using Rela relocs and generating a |
| 361 | relocateable output file) adjusting the reloc addend as |
| 362 | necessary. |
| 363 | |
| 364 | This function does not have to worry about setting the reloc |
| 365 | address or the reloc symbol index. |
| 366 | |
| 367 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 368 | |
| 369 | LOCAL_SECTIONS is an array giving the section in the input file |
| 370 | corresponding to the st_shndx field of each local symbol. |
| 371 | |
| 372 | The global hash table entry for the global symbols can be found |
| 373 | via elf_sym_hashes (input_bfd). |
| 374 | |
| 375 | When generating relocateable output, this function must handle |
| 376 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 377 | going to be the section symbol corresponding to the output |
| 378 | section, which means that the addend must be adjusted |
| 379 | accordingly. */ |
| 380 | boolean (*elf_backend_relocate_section) |
| 381 | PARAMS ((bfd *output_bfd, struct bfd_link_info *info, |
| 382 | bfd *input_bfd, asection *input_section, bfd_byte *contents, |
| 383 | Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, |
| 384 | asection **local_sections)); |
| 385 | |
| 386 | /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend |
| 387 | linker just before it writes a symbol out to the .dynsym section. |
| 388 | The processor backend may make any required adjustment to the |
| 389 | symbol. It may also take the opportunity to set contents of the |
| 390 | dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on |
| 391 | all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called |
| 392 | on those symbols which are defined by a dynamic object. */ |
| 393 | boolean (*elf_backend_finish_dynamic_symbol) |
| 394 | PARAMS ((bfd *output_bfd, struct bfd_link_info *info, |
| 395 | struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)); |
| 396 | |
| 397 | /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend |
| 398 | linker just before it writes all the dynamic sections out to the |
| 399 | output file. The FINISH_DYNAMIC_SYMBOL will have been called on |
| 400 | all dynamic symbols. */ |
| 401 | boolean (*elf_backend_finish_dynamic_sections) |
| 402 | PARAMS ((bfd *output_bfd, struct bfd_link_info *info)); |
| 403 | |
| 404 | /* A function to do any beginning processing needed for the ELF file |
| 405 | before building the ELF headers and computing file positions. */ |
| 406 | void (*elf_backend_begin_write_processing) |
| 407 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 408 | |
| 409 | /* A function to do any final processing needed for the ELF file |
| 410 | before writing it out. The LINKER argument is true if this BFD |
| 411 | was created by the ELF backend linker. */ |
| 412 | void (*elf_backend_final_write_processing) |
| 413 | PARAMS ((bfd *, boolean linker)); |
| 414 | |
| 415 | /* The swapping table to use when dealing with ECOFF information. |
| 416 | Used for the MIPS ELF .mdebug section. */ |
| 417 | const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; |
| 418 | |
| 419 | /* Alternate EM_xxxx machine codes for this backend. */ |
| 420 | int elf_machine_alt1; |
| 421 | int elf_machine_alt2; |
| 422 | |
| 423 | const struct elf_size_info *s; |
| 424 | |
| 425 | unsigned want_got_plt : 1; |
| 426 | unsigned plt_readonly : 1; |
| 427 | unsigned want_plt_sym : 1; |
| 428 | }; |
| 429 | |
| 430 | /* Information stored for each BFD section in an ELF file. This |
| 431 | structure is allocated by elf_new_section_hook. */ |
| 432 | |
| 433 | struct bfd_elf_section_data { |
| 434 | /* The ELF header for this section. */ |
| 435 | Elf_Internal_Shdr this_hdr; |
| 436 | /* The ELF header for the reloc section associated with this |
| 437 | section, if any. */ |
| 438 | Elf_Internal_Shdr rel_hdr; |
| 439 | /* The ELF section number of this section. Only used for an output |
| 440 | file. */ |
| 441 | int this_idx; |
| 442 | /* The ELF section number of the reloc section associated with this |
| 443 | section, if any. Only used for an output file. */ |
| 444 | int rel_idx; |
| 445 | /* Used by the backend linker to store the symbol hash table entries |
| 446 | associated with relocs against global symbols. */ |
| 447 | struct elf_link_hash_entry **rel_hashes; |
| 448 | /* A pointer to the swapped relocs. If the section uses REL relocs, |
| 449 | rather than RELA, all the r_addend fields will be zero. This |
| 450 | pointer may be NULL. It is used by the backend linker. */ |
| 451 | Elf_Internal_Rela *relocs; |
| 452 | /* Used by the backend linker when generating a shared library to |
| 453 | record the dynamic symbol index for a section symbol |
| 454 | corresponding to this section. */ |
| 455 | long dynindx; |
| 456 | }; |
| 457 | |
| 458 | #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd) |
| 459 | |
| 460 | #define get_elf_backend_data(abfd) \ |
| 461 | ((struct elf_backend_data *) (abfd)->xvec->backend_data) |
| 462 | |
| 463 | /* Some private data is stashed away for future use using the tdata pointer |
| 464 | in the bfd structure. */ |
| 465 | |
| 466 | struct elf_obj_tdata |
| 467 | { |
| 468 | Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ |
| 469 | Elf_Internal_Shdr **elf_sect_ptr; |
| 470 | Elf_Internal_Phdr *phdr; |
| 471 | struct bfd_strtab_hash *strtab_ptr; |
| 472 | int num_locals; |
| 473 | int num_globals; |
| 474 | asymbol **section_syms; /* STT_SECTION symbols for each section */ |
| 475 | Elf_Internal_Shdr symtab_hdr; |
| 476 | Elf_Internal_Shdr shstrtab_hdr; |
| 477 | Elf_Internal_Shdr strtab_hdr; |
| 478 | Elf_Internal_Shdr dynsymtab_hdr; |
| 479 | Elf_Internal_Shdr dynstrtab_hdr; |
| 480 | int symtab_section, shstrtab_section, strtab_section, dynsymtab_section; |
| 481 | file_ptr next_file_pos; |
| 482 | void *prstatus; /* The raw /proc prstatus structure */ |
| 483 | void *prpsinfo; /* The raw /proc prpsinfo structure */ |
| 484 | bfd_vma gp; /* The gp value (MIPS only, for now) */ |
| 485 | int gp_size; /* The gp size (MIPS only, for now) */ |
| 486 | |
| 487 | /* This is set to true if the object was created by the backend |
| 488 | linker. */ |
| 489 | boolean linker; |
| 490 | |
| 491 | /* A mapping from external symbols to entries in the linker hash |
| 492 | table, used when linking. This is indexed by the symbol index |
| 493 | minus the sh_info field of the symbol table header. */ |
| 494 | struct elf_link_hash_entry **sym_hashes; |
| 495 | |
| 496 | /* A mapping from local symbols to offsets into the global offset |
| 497 | table, used when linking. This is indexed by the symbol index. */ |
| 498 | bfd_vma *local_got_offsets; |
| 499 | |
| 500 | /* The linker ELF emulation code needs to let the backend ELF linker |
| 501 | know what filename should be used for a dynamic object if the |
| 502 | dynamic object is found using a search. This field is used to |
| 503 | hold that information. */ |
| 504 | const char *dt_needed_name; |
| 505 | |
| 506 | /* Irix 5 often screws up the symbol table, sorting local symbols |
| 507 | after global symbols. This flag is set if the symbol table in |
| 508 | this BFD appears to be screwed up. If it is, we ignore the |
| 509 | sh_info field in the symbol table header, and always read all the |
| 510 | symbols. */ |
| 511 | boolean bad_symtab; |
| 512 | |
| 513 | /* Records the result of `get_program_header_size'. */ |
| 514 | bfd_size_type program_header_size; |
| 515 | |
| 516 | /* Used by MIPS ELF find_nearest_line entry point. The structure |
| 517 | could be included directly in this one, but there's no point to |
| 518 | wasting the memory just for the infrequently called |
| 519 | find_nearest_line. */ |
| 520 | struct mips_elf_find_line *find_line_info; |
| 521 | |
| 522 | /* Used by PowerPC to determine if the e_flags field has been intiialized */ |
| 523 | boolean ppc_flags_init; |
| 524 | }; |
| 525 | |
| 526 | #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) |
| 527 | #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) |
| 528 | #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) |
| 529 | #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) |
| 530 | #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) |
| 531 | #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section) |
| 532 | #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals) |
| 533 | #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) |
| 534 | #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) |
| 535 | #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) |
| 536 | #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) |
| 537 | #define elf_gp(bfd) (elf_tdata(bfd) -> gp) |
| 538 | #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) |
| 539 | #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) |
| 540 | #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets) |
| 541 | #define elf_dt_needed_name(bfd) (elf_tdata(bfd) -> dt_needed_name) |
| 542 | #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) |
| 543 | #define elf_ppc_flags_init(bfd) (elf_tdata(bfd) -> ppc_flags_init) |
| 544 | \f |
| 545 | extern char * bfd_elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned)); |
| 546 | extern char * bfd_elf_get_str_section PARAMS ((bfd *, unsigned)); |
| 547 | |
| 548 | extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *, |
| 549 | bfd_print_symbol_type)); |
| 550 | #define elf_string_from_elf_strtab(abfd,strindex) \ |
| 551 | bfd_elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex) |
| 552 | |
| 553 | #define bfd_elf32_print_symbol bfd_elf_print_symbol |
| 554 | #define bfd_elf64_print_symbol bfd_elf_print_symbol |
| 555 | #define bfd_elf32_mkobject bfd_elf_mkobject |
| 556 | #define bfd_elf64_mkobject bfd_elf_mkobject |
| 557 | #define elf_mkobject bfd_elf_mkobject |
| 558 | |
| 559 | extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *)); |
| 560 | |
| 561 | extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *, |
| 562 | arelent *, |
| 563 | asymbol *, |
| 564 | PTR, |
| 565 | asection *, |
| 566 | bfd *, |
| 567 | char **)); |
| 568 | extern boolean bfd_elf_mkobject PARAMS ((bfd *)); |
| 569 | extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *)); |
| 570 | extern boolean _bfd_elf_make_section_from_shdr |
| 571 | PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)); |
| 572 | extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc |
| 573 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 574 | extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create |
| 575 | PARAMS ((bfd *)); |
| 576 | extern boolean _bfd_elf_link_hash_table_init |
| 577 | PARAMS ((struct elf_link_hash_table *, bfd *, |
| 578 | struct bfd_hash_entry *(*) (struct bfd_hash_entry *, |
| 579 | struct bfd_hash_table *, |
| 580 | const char *))); |
| 581 | |
| 582 | extern boolean _bfd_elf_write_object_contents PARAMS ((bfd *)); |
| 583 | extern boolean _bfd_elf_set_section_contents PARAMS ((bfd *, sec_ptr, PTR, |
| 584 | file_ptr, |
| 585 | bfd_size_type)); |
| 586 | extern long _bfd_elf_get_symtab_upper_bound PARAMS ((bfd *)); |
| 587 | extern long _bfd_elf_get_symtab PARAMS ((bfd *, asymbol **)); |
| 588 | extern long _bfd_elf_get_dynamic_symtab_upper_bound PARAMS ((bfd *)); |
| 589 | extern long _bfd_elf_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **)); |
| 590 | extern long _bfd_elf_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr)); |
| 591 | extern long _bfd_elf_canonicalize_reloc PARAMS ((bfd *, sec_ptr, |
| 592 | arelent **, asymbol **)); |
| 593 | extern asymbol *_bfd_elf_make_empty_symbol PARAMS ((bfd *)); |
| 594 | extern void _bfd_elf_get_symbol_info PARAMS ((bfd *, asymbol *, |
| 595 | symbol_info *)); |
| 596 | extern alent *_bfd_elf_get_lineno PARAMS ((bfd *, asymbol *)); |
| 597 | extern boolean _bfd_elf_set_arch_mach PARAMS ((bfd *, enum bfd_architecture, |
| 598 | unsigned long)); |
| 599 | extern boolean _bfd_elf_find_nearest_line PARAMS ((bfd *, asection *, |
| 600 | asymbol **, |
| 601 | bfd_vma, CONST char **, |
| 602 | CONST char **, |
| 603 | unsigned int *)); |
| 604 | extern int _bfd_elf_sizeof_headers PARAMS ((bfd *, boolean)); |
| 605 | extern boolean _bfd_elf_new_section_hook PARAMS ((bfd *, asection *)); |
| 606 | |
| 607 | /* If the target doesn't have reloc handling written yet: */ |
| 608 | extern void _bfd_elf_no_info_to_howto PARAMS ((bfd *, arelent *, |
| 609 | Elf_Internal_Rela *)); |
| 610 | |
| 611 | asection *bfd_section_from_elf_index PARAMS ((bfd *, unsigned int)); |
| 612 | boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *, |
| 613 | struct bfd_link_info *)); |
| 614 | struct bfd_strtab_hash *_bfd_elf_stringtab_init PARAMS ((void)); |
| 615 | boolean |
| 616 | _bfd_elf_link_record_dynamic_symbol PARAMS ((struct bfd_link_info *, |
| 617 | struct elf_link_hash_entry *)); |
| 618 | boolean |
| 619 | _bfd_elf_compute_section_file_positions PARAMS ((bfd *, |
| 620 | struct bfd_link_info *)); |
| 621 | void _bfd_elf_assign_file_positions_for_relocs PARAMS ((bfd *)); |
| 622 | file_ptr _bfd_elf_assign_file_position_for_section PARAMS ((Elf_Internal_Shdr *, |
| 623 | file_ptr, |
| 624 | boolean)); |
| 625 | |
| 626 | boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *, |
| 627 | struct bfd_link_info *)); |
| 628 | boolean _bfd_elf_create_got_section PARAMS ((bfd *, |
| 629 | struct bfd_link_info *)); |
| 630 | |
| 631 | extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *)); |
| 632 | extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *)); |
| 633 | extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *)); |
| 634 | extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *)); |
| 635 | extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *, |
| 636 | bfd *)); |
| 637 | |
| 638 | extern boolean bfd_elf32_bfd_link_add_symbols |
| 639 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 640 | extern boolean bfd_elf32_bfd_final_link |
| 641 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 642 | |
| 643 | extern void bfd_elf32_swap_symbol_in |
| 644 | PARAMS ((bfd *, Elf32_External_Sym *, Elf_Internal_Sym *)); |
| 645 | extern void bfd_elf32_swap_symbol_out |
| 646 | PARAMS ((bfd *, Elf_Internal_Sym *, PTR)); |
| 647 | extern void bfd_elf32_swap_reloc_in |
| 648 | PARAMS ((bfd *, Elf32_External_Rel *, Elf_Internal_Rel *)); |
| 649 | extern void bfd_elf32_swap_reloc_out |
| 650 | PARAMS ((bfd *, Elf_Internal_Rel *, Elf32_External_Rel *)); |
| 651 | extern void bfd_elf32_swap_reloca_in |
| 652 | PARAMS ((bfd *, Elf32_External_Rela *, Elf_Internal_Rela *)); |
| 653 | extern void bfd_elf32_swap_reloca_out |
| 654 | PARAMS ((bfd *, Elf_Internal_Rela *, Elf32_External_Rela *)); |
| 655 | extern void bfd_elf32_swap_dyn_in |
| 656 | PARAMS ((bfd *, const Elf32_External_Dyn *, Elf_Internal_Dyn *)); |
| 657 | extern void bfd_elf32_swap_dyn_out |
| 658 | PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *)); |
| 659 | extern boolean bfd_elf32_add_dynamic_entry |
| 660 | PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma)); |
| 661 | extern boolean bfd_elf32_link_create_dynamic_sections |
| 662 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 663 | |
| 664 | extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *)); |
| 665 | extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *)); |
| 666 | extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *)); |
| 667 | extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *)); |
| 668 | extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *, |
| 669 | bfd *)); |
| 670 | extern boolean bfd_elf64_bfd_link_add_symbols |
| 671 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 672 | extern boolean bfd_elf64_bfd_final_link |
| 673 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 674 | |
| 675 | extern void bfd_elf64_swap_symbol_in |
| 676 | PARAMS ((bfd *, Elf64_External_Sym *, Elf_Internal_Sym *)); |
| 677 | extern void bfd_elf64_swap_symbol_out |
| 678 | PARAMS ((bfd *, Elf_Internal_Sym *, PTR)); |
| 679 | extern void bfd_elf64_swap_reloc_in |
| 680 | PARAMS ((bfd *, Elf64_External_Rel *, Elf_Internal_Rel *)); |
| 681 | extern void bfd_elf64_swap_reloc_out |
| 682 | PARAMS ((bfd *, Elf_Internal_Rel *, Elf64_External_Rel *)); |
| 683 | extern void bfd_elf64_swap_reloca_in |
| 684 | PARAMS ((bfd *, Elf64_External_Rela *, Elf_Internal_Rela *)); |
| 685 | extern void bfd_elf64_swap_reloca_out |
| 686 | PARAMS ((bfd *, Elf_Internal_Rela *, Elf64_External_Rela *)); |
| 687 | extern void bfd_elf64_swap_dyn_in |
| 688 | PARAMS ((bfd *, const Elf64_External_Dyn *, Elf_Internal_Dyn *)); |
| 689 | extern void bfd_elf64_swap_dyn_out |
| 690 | PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *)); |
| 691 | extern boolean bfd_elf64_add_dynamic_entry |
| 692 | PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma)); |
| 693 | extern boolean bfd_elf64_link_create_dynamic_sections |
| 694 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 695 | |
| 696 | #define bfd_elf32_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol |
| 697 | #define bfd_elf64_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol |
| 698 | |
| 699 | #endif /* _LIBELF_H_ */ |