bfd/libelf.h

   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., 675 Mass Ave, Cambridge, MA 02139, 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 is defined as weak.  */
 121 #define ELF_LINK_HASH_DEFINED_WEAK 040
 122   /* Symbol needs a copy reloc.  */
 123 #define ELF_LINK_HASH_NEEDS_COPY 0100
 124 };
 125
 126 /* ELF linker hash table.  */
 127
 128 struct elf_link_hash_table
 129 {
 130   struct bfd_link_hash_table root;
 131   /* The first dynamic object found during a link.  We create several
 132      special input sections when linking against dynamic objects, and
 133      we simply attach them to the first one found.  */
 134   bfd *dynobj;
 135   /* The number of symbols found in the link which must be put into
 136      the .dynsym section.  */
 137   size_t dynsymcount;
 138   /* The string table of dynamic symbols, which becomes the .dynstr
 139      section.  */
 140   struct bfd_strtab_hash *dynstr;
 141   /* The number of buckets in the hash table in the .hash section.
 142      This is based on the number of dynamic symbols.  */
 143   size_t bucketcount;
 144 };
 145
 146 /* Look up an entry in an ELF linker hash table.  */
 147
 148 #define elf_link_hash_lookup(table, string, create, copy, follow)       \
 149   ((struct elf_link_hash_entry *)                                       \
 150    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 151                          (copy), (follow)))
 152
 153 /* Traverse an ELF linker hash table.  */
 154
 155 #define elf_link_hash_traverse(table, func, info)                       \
 156   (bfd_link_hash_traverse                                               \
 157    (&(table)->root,                                                     \
 158     (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \
 159     (info)))
 160
 161 /* Get the ELF linker hash table from a link_info structure.  */
 162
 163 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
 164 \f
 165 /* Constant information held for an ELF backend.  */
 166
 167 struct elf_backend_data
 168 {
 169   /* Whether the backend uses REL or RELA relocations.  FIXME: some
 170      ELF backends use both.  When we need to support one, this whole
 171      approach will need to be changed.  */
 172   int use_rela_p;
 173
 174   /* Whether this backend is 64 bits or not.  FIXME: Who cares?  */
 175   int elf_64_p;
 176
 177   /* The architecture for this backend.  */
 178   enum bfd_architecture arch;
 179
 180   /* The ELF machine code (EM_xxxx) for this backend.  */
 181   int elf_machine_code;
 182
 183   /* The maximum page size for this backend.  */
 184   bfd_vma maxpagesize;
 185
 186   /* This is true if the linker should act like collect and gather
 187      global constructors and destructors by name.  This is true for
 188      MIPS ELF because the Irix 5 tools can not handle the .init
 189      section.  */
 190   boolean collect;
 191
 192   /* A function to translate an ELF RELA relocation to a BFD arelent
 193      structure.  */
 194   void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
 195                                      Elf_Internal_Rela *));
 196
 197   /* A function to translate an ELF REL relocation to a BFD arelent
 198      structure.  */
 199   void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
 200                                          Elf_Internal_Rel *));
 201
 202   /* A function to determine whether a symbol is global when
 203      partitioning the symbol table into local and global symbols.
 204      This should be NULL for most targets, in which case the correct
 205      thing will be done.  MIPS ELF, at least on the Irix 5, has
 206      special requirements.  */
 207   boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *));
 208
 209   /* The remaining functions are hooks which are called only if they
 210      are not NULL.  */
 211
 212   /* A function to permit a backend specific check on whether a
 213      particular BFD format is relevant for an object file, and to
 214      permit the backend to set any global information it wishes.  When
 215      this is called elf_elfheader is set, but anything else should be
 216      used with caution.  If this returns false, the check_format
 217      routine will return a bfd_error_wrong_format error.  */
 218   boolean (*elf_backend_object_p) PARAMS ((bfd *));
 219
 220   /* A function to do additional symbol processing when reading the
 221      ELF symbol table.  This is where any processor-specific special
 222      section indices are handled.  */
 223   void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *));
 224
 225   /* A function to do additional symbol processing after reading the
 226      entire ELF symbol table.  */
 227   boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *,
 228                                                           elf_symbol_type *,
 229                                                           int));
 230
 231   /* A function to do additional processing on the ELF section header
 232      just before writing it out.  This is used to set the flags and
 233      type fields for some sections, or to actually write out data for
 234      unusual sections.  */
 235   boolean (*elf_backend_section_processing) PARAMS ((bfd *,
 236                                                      Elf32_Internal_Shdr *));
 237
 238   /* A function to handle unusual section types when creating BFD
 239      sections from ELF sections.  */
 240   boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *,
 241                                                     Elf32_Internal_Shdr *,
 242                                                     char *));
 243
 244   /* A function to set up the ELF section header for a BFD section in
 245      preparation for writing it out.  This is where the flags and type
 246      fields are set for unusual sections.  */
 247   boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *,
 248                                                 asection *));
 249
 250   /* A function to get the ELF section index for a BFD section.  If
 251      this returns true, the section was found.  If it is a normal ELF
 252      section, *RETVAL should be left unchanged.  If it is not a normal
 253      ELF section *RETVAL should be set to the SHN_xxxx index.  */
 254   boolean (*elf_backend_section_from_bfd_section)
 255     PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
 256
 257   /* If this field is not NULL, it is called by the add_symbols phase
 258      of a link just before adding a symbol to the global linker hash
 259      table.  It may modify any of the fields as it wishes.  If *NAME
 260      is set to NULL, the symbol will be skipped rather than being
 261      added to the hash table.  This function is responsible for
 262      handling all processor dependent symbol bindings and section
 263      indices, and must set at least *FLAGS and *SEC for each processor
 264      dependent case; failure to do so will cause a link error.  */
 265   boolean (*elf_add_symbol_hook)
 266     PARAMS ((bfd *abfd, struct bfd_link_info *info,
 267              const Elf_Internal_Sym *, const char **name,
 268              flagword *flags, asection **sec, bfd_vma *value));
 269
 270   /* If this field is not NULL, it is called by the elf_link_output_sym
 271      phase of a link for each symbol which will appear in the object file.  */
 272   boolean (*elf_backend_link_output_symbol_hook)
 273     PARAMS ((bfd *, struct bfd_link_info *info, const char *,
 274              Elf_Internal_Sym *, asection *));
 275
 276   /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
 277      linker the first time it encounters a dynamic object in the link.
 278      This function must create any sections required for dynamic
 279      linking.  The ABFD argument is a dynamic object.  The .interp,
 280      .dynamic, .dynsym, .dynstr, and .hash functions have already been
 281      created, and this function may modify the section flags if
 282      desired.  This function will normally create the .got and .plt
 283      sections, but different backends have different requirements.  */
 284   boolean (*elf_backend_create_dynamic_sections)
 285     PARAMS ((bfd *abfd, struct bfd_link_info *info));
 286
 287   /* The CHECK_RELOCS function is called by the add_symbols phase of
 288      the ELF backend linker.  It is called once for each section with
 289      relocs of an object file, just after the symbols for the object
 290      file have been added to the global linker hash table.  The
 291      function must look through the relocs and do any special handling
 292      required.  This generally means allocating space in the global
 293      offset table, and perhaps allocating space for a reloc.  The
 294      relocs are always passed as Rela structures; if the section
 295      actually uses Rel structures, the r_addend field will always be
 296      zero.  */
 297   boolean (*check_relocs)
 298     PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
 299              const Elf_Internal_Rela *relocs));
 300
 301   /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
 302      linker for every symbol which is defined by a dynamic object and
 303      referenced by a regular object.  This is called after all the
 304      input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
 305      function has been called.  The hash table entry should be
 306      bfd_link_hash_defined, and it should be defined in a section from
 307      a dynamic object.  Dynamic object sections are not included in
 308      the final link, and this function is responsible for changing the
 309      value to something which the rest of the link can deal with.
 310      This will normally involve adding an entry to the .plt or .got or
 311      some such section, and setting the symbol to point to that.  */
 312   boolean (*elf_backend_adjust_dynamic_symbol)
 313     PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
 314
 315   /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
 316      linker after all the linker input files have been seen but before
 317      the sections sizes have been set.  This is called after
 318      ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
 319      It is only called when linking against a dynamic object.  It must
 320      set the sizes of the dynamic sections, and may fill in their
 321      contents as well.  The generic ELF linker can handle the .dynsym,
 322      .dynstr and .hash sections.  This function must handle the
 323      .interp section and any sections created by the
 324      CREATE_DYNAMIC_SECTIONS entry point.  */
 325   boolean (*elf_backend_size_dynamic_sections)
 326     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 327
 328   /* The RELOCATE_SECTION function is called by the ELF backend linker
 329      to handle the relocations for a section.
 330
 331      The relocs are always passed as Rela structures; if the section
 332      actually uses Rel structures, the r_addend field will always be
 333      zero.
 334
 335      This function is responsible for adjust the section contents as
 336      necessary, and (if using Rela relocs and generating a
 337      relocateable output file) adjusting the reloc addend as
 338      necessary.
 339
 340      This function does not have to worry about setting the reloc
 341      address or the reloc symbol index.
 342
 343      LOCAL_SYMS is a pointer to the swapped in local symbols.
 344
 345      LOCAL_SECTIONS is an array giving the section in the input file
 346      corresponding to the st_shndx field of each local symbol.
 347
 348      The global hash table entry for the global symbols can be found
 349      via elf_sym_hashes (input_bfd).
 350
 351      When generating relocateable output, this function must handle
 352      STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
 353      going to be the section symbol corresponding to the output
 354      section, which means that the addend must be adjusted
 355      accordingly.  */
 356   boolean (*elf_backend_relocate_section)
 357     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 358              bfd *input_bfd, asection *input_section, bfd_byte *contents,
 359              Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
 360              asection **local_sections));
 361
 362   /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
 363      linker just before it writes a symbol out to the .dynsym section.
 364      The processor backend may make any required adjustment to the
 365      symbol.  It may also take the opportunity to set contents of the
 366      dynamic sections.  Note that FINISH_DYNAMIC_SYMBOL is called on
 367      all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
 368      on those symbols which are defined by a dynamic object.  */
 369   boolean (*elf_backend_finish_dynamic_symbol)
 370     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 371              struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
 372
 373   /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
 374      linker just before it writes all the dynamic sections out to the
 375      output file.  The FINISH_DYNAMIC_SYMBOL will have been called on
 376      all dynamic symbols.  */
 377   boolean (*elf_backend_finish_dynamic_sections)
 378     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 379
 380   /* A function to do any beginning processing needed for the ELF file
 381      before building the ELF headers and computing file positions.  */
 382   void (*elf_backend_begin_write_processing)
 383     PARAMS ((bfd *, struct bfd_link_info *));
 384
 385   /* A function to do any final processing needed for the ELF file
 386      before writing it out.  The LINKER argument is true if this BFD
 387      was created by the ELF backend linker.  */
 388   void (*elf_backend_final_write_processing)
 389     PARAMS ((bfd *, boolean linker));
 390
 391   /* The swapping table to use when dealing with ECOFF information.
 392      Used for the MIPS ELF .mdebug section.  */
 393   const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
 394 };
 395
 396 /* Information stored for each BFD section in an ELF file.  This
 397    structure is allocated by elf_new_section_hook.  */
 398
 399 struct bfd_elf_section_data {
 400   /* The ELF header for this section.  */
 401   Elf_Internal_Shdr this_hdr;
 402   /* The ELF header for the reloc section associated with this
 403      section, if any.  */
 404   Elf_Internal_Shdr rel_hdr;
 405   /* The ELF section number of this section.  Only used for an output
 406      file.  */
 407   int this_idx;
 408   /* The ELF section number of the reloc section associated with this
 409      section, if any.  Only used for an output file.  */
 410   int rel_idx;
 411   /* Used by the backend linker to store the symbol hash table entries
 412      associated with relocs against global symbols.  */
 413   struct elf_link_hash_entry **rel_hashes;
 414   /* A pointer to the swapped relocs.  If the section uses REL relocs,
 415      rather than RELA, all the r_addend fields will be zero.  This
 416      pointer may be NULL.  It is used by the backend linker.  */
 417   Elf_Internal_Rela *relocs;
 418 };
 419
 420 #define elf_section_data(sec)  ((struct bfd_elf_section_data*)sec->used_by_bfd)
 421
 422 #define get_elf_backend_data(abfd) \
 423   ((struct elf_backend_data *) (abfd)->xvec->backend_data)
 424
 425 /* Some private data is stashed away for future use using the tdata pointer
 426    in the bfd structure.  */
 427
 428 struct elf_obj_tdata
 429 {
 430   Elf_Internal_Ehdr elf_header[1];      /* Actual data, but ref like ptr */
 431   Elf_Internal_Shdr **elf_sect_ptr;
 432   Elf_Internal_Phdr *phdr;
 433   struct bfd_strtab_hash *strtab_ptr;
 434   int num_locals;
 435   int num_globals;
 436   asymbol **section_syms;       /* STT_SECTION symbols for each section */
 437   Elf_Internal_Shdr symtab_hdr;
 438   Elf_Internal_Shdr shstrtab_hdr;
 439   Elf_Internal_Shdr strtab_hdr;
 440   Elf_Internal_Shdr dynsymtab_hdr;
 441   Elf_Internal_Shdr dynstrtab_hdr;
 442   int symtab_section, shstrtab_section, strtab_section, dynsymtab_section;
 443   file_ptr next_file_pos;
 444   void *prstatus;               /* The raw /proc prstatus structure */
 445   void *prpsinfo;               /* The raw /proc prpsinfo structure */
 446   bfd_vma gp;                   /* The gp value (MIPS only, for now) */
 447   int gp_size;                  /* The gp size (MIPS only, for now) */
 448
 449   /* This is set to true if the object was created by the backend
 450      linker.  */
 451   boolean linker;
 452
 453   /* A mapping from external symbols to entries in the linker hash
 454      table, used when linking.  This is indexed by the symbol index
 455      minus the sh_info field of the symbol table header.  */
 456   struct elf_link_hash_entry **sym_hashes;
 457
 458   /* A mapping from local symbols to offsets into the global offset
 459      table, used when linking.  This is indexed by the symbol index.  */
 460   bfd_vma *local_got_offsets;
 461
 462   /* The linker ELF emulation code needs to let the backend ELF linker
 463      know what filename should be used for a dynamic object if the
 464      dynamic object is found using a search.  This field is used to
 465      hold that information.  */
 466   const char *dt_needed_name;
 467
 468   /* Irix 5 often screws up the symbol table, sorting local symbols
 469      after global symbols.  This flag is set if the symbol table in
 470      this BFD appears to be screwed up.  If it is, we ignore the
 471      sh_info field in the symbol table header, and always read all the
 472      symbols.  */
 473   boolean bad_symtab;
 474 };
 475
 476 #define elf_tdata(bfd)          ((bfd) -> tdata.elf_obj_data)
 477 #define elf_elfheader(bfd)      (elf_tdata(bfd) -> elf_header)
 478 #define elf_elfsections(bfd)    (elf_tdata(bfd) -> elf_sect_ptr)
 479 #define elf_shstrtab(bfd)       (elf_tdata(bfd) -> strtab_ptr)
 480 #define elf_onesymtab(bfd)      (elf_tdata(bfd) -> symtab_section)
 481 #define elf_dynsymtab(bfd)      (elf_tdata(bfd) -> dynsymtab_section)
 482 #define elf_num_locals(bfd)     (elf_tdata(bfd) -> num_locals)
 483 #define elf_num_globals(bfd)    (elf_tdata(bfd) -> num_globals)
 484 #define elf_section_syms(bfd)   (elf_tdata(bfd) -> section_syms)
 485 #define core_prpsinfo(bfd)      (elf_tdata(bfd) -> prpsinfo)
 486 #define core_prstatus(bfd)      (elf_tdata(bfd) -> prstatus)
 487 #define elf_gp(bfd)             (elf_tdata(bfd) -> gp)
 488 #define elf_gp_size(bfd)        (elf_tdata(bfd) -> gp_size)
 489 #define elf_sym_hashes(bfd)     (elf_tdata(bfd) -> sym_hashes)
 490 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets)
 491 #define elf_dt_needed_name(bfd) (elf_tdata(bfd) -> dt_needed_name)
 492 #define elf_bad_symtab(bfd)     (elf_tdata(bfd) -> bad_symtab)
 493 \f
 494 extern char * elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
 495 extern char * elf_get_str_section PARAMS ((bfd *, unsigned));
 496
 497 extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *,
 498                                           bfd_print_symbol_type));
 499
 500 #define bfd_elf32_print_symbol  bfd_elf_print_symbol
 501 #define bfd_elf64_print_symbol  bfd_elf_print_symbol
 502 #define bfd_elf32_mkobject      bfd_elf_mkobject
 503 #define bfd_elf64_mkobject      bfd_elf_mkobject
 504 #define elf_mkobject            bfd_elf_mkobject
 505
 506 extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *));
 507
 508 extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *,
 509                                                             arelent *,
 510                                                             asymbol *,
 511                                                             PTR,
 512                                                             asection *,
 513                                                             bfd *,
 514                                                             char **));
 515 extern boolean bfd_elf_mkobject PARAMS ((bfd *));
 516 extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
 517 extern boolean _bfd_elf_make_section_from_shdr
 518   PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
 519 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
 520   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 521 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
 522   PARAMS ((bfd *));
 523 extern boolean _bfd_elf_link_hash_table_init
 524   PARAMS ((struct elf_link_hash_table *, bfd *,
 525            struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 526                                        struct bfd_hash_table *,
 527                                        const char *)));
 528
 529 extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
 530 extern boolean bfd_elf64_write_object_contents PARAMS ((bfd *));
 531
 532 extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
 533 extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
 534 extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
 535 extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
 536 extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
 537                                                                  bfd *));
 538 extern boolean bfd_elf32_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
 539                                                        file_ptr,
 540                                                        bfd_size_type));
 541
 542 extern long bfd_elf32_get_symtab_upper_bound PARAMS ((bfd *));
 543 extern long bfd_elf32_get_symtab PARAMS ((bfd *, asymbol **));
 544 extern long bfd_elf32_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
 545 extern long bfd_elf32_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
 546 extern long bfd_elf32_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 547 extern long bfd_elf32_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 548                                                   arelent **, asymbol **));
 549 extern asymbol *bfd_elf32_make_empty_symbol PARAMS ((bfd *));
 550 extern void bfd_elf32_get_symbol_info PARAMS ((bfd *, asymbol *,
 551                                                symbol_info *));
 552 extern alent *bfd_elf32_get_lineno PARAMS ((bfd *, asymbol *));
 553 extern boolean bfd_elf32_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 554                                                 unsigned long));
 555 extern boolean bfd_elf32_find_nearest_line PARAMS ((bfd *, asection *,
 556                                                     asymbol **,
 557                                                     bfd_vma, CONST char **,
 558                                                     CONST char **,
 559                                                     unsigned int *));
 560 extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
 561 extern void bfd_elf32__write_relocs PARAMS ((bfd *, asection *, PTR));
 562 extern boolean bfd_elf32_new_section_hook PARAMS ((bfd *, asection *));
 563 extern boolean bfd_elf32_bfd_link_add_symbols
 564   PARAMS ((bfd *, struct bfd_link_info *));
 565 extern boolean bfd_elf32_bfd_final_link
 566   PARAMS ((bfd *, struct bfd_link_info *));
 567
 568 extern void bfd_elf32_swap_symbol_in
 569   PARAMS ((bfd *, Elf32_External_Sym *, Elf_Internal_Sym *));
 570 extern void bfd_elf32_swap_symbol_out
 571   PARAMS ((bfd *, Elf_Internal_Sym *, Elf32_External_Sym *));
 572 extern void bfd_elf32_swap_reloc_in
 573   PARAMS ((bfd *, Elf32_External_Rel *, Elf_Internal_Rel *));
 574 extern void bfd_elf32_swap_reloc_out
 575   PARAMS ((bfd *, Elf_Internal_Rel *, Elf32_External_Rel *));
 576 extern void bfd_elf32_swap_reloca_in
 577   PARAMS ((bfd *, Elf32_External_Rela *, Elf_Internal_Rela *));
 578 extern void bfd_elf32_swap_reloca_out
 579   PARAMS ((bfd *, Elf_Internal_Rela *, Elf32_External_Rela *));
 580 extern void bfd_elf32_swap_dyn_in
 581   PARAMS ((bfd *, const Elf32_External_Dyn *, Elf_Internal_Dyn *));
 582 extern void bfd_elf32_swap_dyn_out
 583   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *));
 584 extern boolean bfd_elf32_add_dynamic_entry
 585   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 586 extern boolean bfd_elf32_link_create_dynamic_sections
 587   PARAMS ((bfd *, struct bfd_link_info *));
 588 extern boolean bfd_elf32_link_record_dynamic_symbol
 589   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
 590
 591 /* If the target doesn't have reloc handling written yet:  */
 592 extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
 593                                                 Elf32_Internal_Rela *));
 594
 595 extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
 596 extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
 597 extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
 598 extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
 599 extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
 600                                                                  bfd *));
 601 extern boolean bfd_elf64_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
 602                                                        file_ptr,
 603                                                        bfd_size_type));
 604
 605 extern long bfd_elf64_get_symtab_upper_bound PARAMS ((bfd *));
 606 extern long bfd_elf64_get_symtab PARAMS ((bfd *, asymbol **));
 607 extern long bfd_elf64_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
 608 extern long bfd_elf64_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
 609 extern long bfd_elf64_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 610 extern long bfd_elf64_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 611                                                   arelent **, asymbol **));
 612 extern asymbol *bfd_elf64_make_empty_symbol PARAMS ((bfd *));
 613 extern void bfd_elf64_get_symbol_info PARAMS ((bfd *, asymbol *,
 614                                                symbol_info *));
 615 extern alent *bfd_elf64_get_lineno PARAMS ((bfd *, asymbol *));
 616 extern boolean bfd_elf64_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 617                                                 unsigned long));
 618 extern boolean bfd_elf64_find_nearest_line PARAMS ((bfd *, asection *,
 619                                                     asymbol **,
 620                                                     bfd_vma, CONST char **,
 621                                                     CONST char **,
 622                                                     unsigned int *));
 623 extern int bfd_elf64_sizeof_headers PARAMS ((bfd *, boolean));
 624 extern void bfd_elf64__write_relocs PARAMS ((bfd *, asection *, PTR));
 625 extern boolean bfd_elf64_new_section_hook PARAMS ((bfd *, asection *));
 626 extern boolean bfd_elf64_bfd_link_add_symbols
 627   PARAMS ((bfd *, struct bfd_link_info *));
 628 extern boolean bfd_elf64_bfd_final_link
 629   PARAMS ((bfd *, struct bfd_link_info *));
 630
 631 extern void bfd_elf64_swap_symbol_in
 632   PARAMS ((bfd *, Elf64_External_Sym *, Elf_Internal_Sym *));
 633 extern void bfd_elf64_swap_symbol_out
 634   PARAMS ((bfd *, Elf_Internal_Sym *, Elf64_External_Sym *));
 635 extern void bfd_elf64_swap_reloc_in
 636   PARAMS ((bfd *, Elf64_External_Rel *, Elf_Internal_Rel *));
 637 extern void bfd_elf64_swap_reloc_out
 638   PARAMS ((bfd *, Elf_Internal_Rel *, Elf64_External_Rel *));
 639 extern void bfd_elf64_swap_reloca_in
 640   PARAMS ((bfd *, Elf64_External_Rela *, Elf_Internal_Rela *));
 641 extern void bfd_elf64_swap_reloca_out
 642   PARAMS ((bfd *, Elf_Internal_Rela *, Elf64_External_Rela *));
 643 extern void bfd_elf64_swap_dyn_in
 644   PARAMS ((bfd *, const Elf64_External_Dyn *, Elf_Internal_Dyn *));
 645 extern void bfd_elf64_swap_dyn_out
 646   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *));
 647 extern boolean bfd_elf64_add_dynamic_entry
 648   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 649 extern boolean bfd_elf64_link_create_dynamic_sections
 650   PARAMS ((bfd *, struct bfd_link_info *));
 651 extern boolean bfd_elf64_link_record_dynamic_symbol
 652   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
 653
 654 /* If the target doesn't have reloc handling written yet:  */
 655 extern void bfd_elf64_no_info_to_howto PARAMS ((bfd *, arelent *,
 656                                                 Elf64_Internal_Rela *));
 657
 658 #endif /* _LIBELF_H_ */