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 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   /* Whether we are linking against a dynamic object which has a
 148      DT_NEEDED entry in the .dynamic section.  This may need to become
 149      a list of DT_NEEDED entries.  */
 150   boolean saw_needed;
 151 };
 152
 153 /* Look up an entry in an ELF linker hash table.  */
 154
 155 #define elf_link_hash_lookup(table, string, create, copy, follow)       \
 156   ((struct elf_link_hash_entry *)                                       \
 157    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 158                          (copy), (follow)))
 159
 160 /* Traverse an ELF linker hash table.  */
 161
 162 #define elf_link_hash_traverse(table, func, info)                       \
 163   (bfd_link_hash_traverse                                               \
 164    (&(table)->root,                                                     \
 165     (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \
 166     (info)))
 167
 168 /* Get the ELF linker hash table from a link_info structure.  */
 169
 170 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
 171 \f
 172 /* Constant information held for an ELF backend.  */
 173
 174 struct elf_backend_data
 175 {
 176   /* Whether the backend uses REL or RELA relocations.  FIXME: some
 177      ELF backends use both.  When we need to support one, this whole
 178      approach will need to be changed.  */
 179   int use_rela_p;
 180
 181   /* Whether this backend is 64 bits or not.  FIXME: Who cares?  */
 182   int elf_64_p;
 183
 184   /* The architecture for this backend.  */
 185   enum bfd_architecture arch;
 186
 187   /* The ELF machine code (EM_xxxx) for this backend.  */
 188   int elf_machine_code;
 189
 190   /* The maximum page size for this backend.  */
 191   bfd_vma maxpagesize;
 192
 193   /* This is true if the linker should act like collect and gather
 194      global constructors and destructors by name.  This is true for
 195      MIPS ELF because the Irix 5 tools can not handle the .init
 196      section.  */
 197   boolean collect;
 198
 199   /* A function to translate an ELF RELA relocation to a BFD arelent
 200      structure.  */
 201   void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
 202                                      Elf_Internal_Rela *));
 203
 204   /* A function to translate an ELF REL relocation to a BFD arelent
 205      structure.  */
 206   void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
 207                                          Elf_Internal_Rel *));
 208
 209   /* A function to determine whether a symbol is global when
 210      partitioning the symbol table into local and global symbols.
 211      This should be NULL for most targets, in which case the correct
 212      thing will be done.  MIPS ELF, at least on the Irix 5, has
 213      special requirements.  */
 214   boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *));
 215
 216   /* The remaining functions are hooks which are called only if they
 217      are not NULL.  */
 218
 219   /* A function to permit a backend specific check on whether a
 220      particular BFD format is relevant for an object file, and to
 221      permit the backend to set any global information it wishes.  When
 222      this is called elf_elfheader is set, but anything else should be
 223      used with caution.  If this returns false, the check_format
 224      routine will return a bfd_error_wrong_format error.  */
 225   boolean (*elf_backend_object_p) PARAMS ((bfd *));
 226
 227   /* A function to do additional symbol processing when reading the
 228      ELF symbol table.  This is where any processor-specific special
 229      section indices are handled.  */
 230   void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *));
 231
 232   /* A function to do additional symbol processing after reading the
 233      entire ELF symbol table.  */
 234   boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *,
 235                                                           elf_symbol_type *,
 236                                                           int));
 237
 238   /* A function to do additional processing on the ELF section header
 239      just before writing it out.  This is used to set the flags and
 240      type fields for some sections, or to actually write out data for
 241      unusual sections.  */
 242   boolean (*elf_backend_section_processing) PARAMS ((bfd *,
 243                                                      Elf32_Internal_Shdr *));
 244
 245   /* A function to handle unusual section types when creating BFD
 246      sections from ELF sections.  */
 247   boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *,
 248                                                     Elf32_Internal_Shdr *,
 249                                                     char *));
 250
 251   /* A function to set up the ELF section header for a BFD section in
 252      preparation for writing it out.  This is where the flags and type
 253      fields are set for unusual sections.  */
 254   boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *,
 255                                                 asection *));
 256
 257   /* A function to get the ELF section index for a BFD section.  If
 258      this returns true, the section was found.  If it is a normal ELF
 259      section, *RETVAL should be left unchanged.  If it is not a normal
 260      ELF section *RETVAL should be set to the SHN_xxxx index.  */
 261   boolean (*elf_backend_section_from_bfd_section)
 262     PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
 263
 264   /* If this field is not NULL, it is called by the add_symbols phase
 265      of a link just before adding a symbol to the global linker hash
 266      table.  It may modify any of the fields as it wishes.  If *NAME
 267      is set to NULL, the symbol will be skipped rather than being
 268      added to the hash table.  This function is responsible for
 269      handling all processor dependent symbol bindings and section
 270      indices, and must set at least *FLAGS and *SEC for each processor
 271      dependent case; failure to do so will cause a link error.  */
 272   boolean (*elf_add_symbol_hook)
 273     PARAMS ((bfd *abfd, struct bfd_link_info *info,
 274              const Elf_Internal_Sym *, const char **name,
 275              flagword *flags, asection **sec, bfd_vma *value));
 276
 277   /* If this field is not NULL, it is called by the elf_link_output_sym
 278      phase of a link for each symbol which will appear in the object file.  */
 279   boolean (*elf_backend_link_output_symbol_hook)
 280     PARAMS ((bfd *, struct bfd_link_info *info, const char *,
 281              Elf_Internal_Sym *, asection *));
 282
 283   /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
 284      linker the first time it encounters a dynamic object in the link.
 285      This function must create any sections required for dynamic
 286      linking.  The ABFD argument is a dynamic object.  The .interp,
 287      .dynamic, .dynsym, .dynstr, and .hash functions have already been
 288      created, and this function may modify the section flags if
 289      desired.  This function will normally create the .got and .plt
 290      sections, but different backends have different requirements.  */
 291   boolean (*elf_backend_create_dynamic_sections)
 292     PARAMS ((bfd *abfd, struct bfd_link_info *info));
 293
 294   /* The CHECK_RELOCS function is called by the add_symbols phase of
 295      the ELF backend linker.  It is called once for each section with
 296      relocs of an object file, just after the symbols for the object
 297      file have been added to the global linker hash table.  The
 298      function must look through the relocs and do any special handling
 299      required.  This generally means allocating space in the global
 300      offset table, and perhaps allocating space for a reloc.  The
 301      relocs are always passed as Rela structures; if the section
 302      actually uses Rel structures, the r_addend field will always be
 303      zero.  */
 304   boolean (*check_relocs)
 305     PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
 306              const Elf_Internal_Rela *relocs));
 307
 308   /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
 309      linker for every symbol which is defined by a dynamic object and
 310      referenced by a regular object.  This is called after all the
 311      input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
 312      function has been called.  The hash table entry should be
 313      bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
 314      defined in a section from a dynamic object.  Dynamic object
 315      sections are not included in the final link, and this function is
 316      responsible for changing the value to something which the rest of
 317      the link can deal with.  This will normally involve adding an
 318      entry to the .plt or .got or some such section, and setting the
 319      symbol to point to that.  */
 320   boolean (*elf_backend_adjust_dynamic_symbol)
 321     PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
 322
 323   /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
 324      linker after all the linker input files have been seen but before
 325      the sections sizes have been set.  This is called after
 326      ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
 327      It is only called when linking against a dynamic object.  It must
 328      set the sizes of the dynamic sections, and may fill in their
 329      contents as well.  The generic ELF linker can handle the .dynsym,
 330      .dynstr and .hash sections.  This function must handle the
 331      .interp section and any sections created by the
 332      CREATE_DYNAMIC_SECTIONS entry point.  */
 333   boolean (*elf_backend_size_dynamic_sections)
 334     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 335
 336   /* The RELOCATE_SECTION function is called by the ELF backend linker
 337      to handle the relocations for a section.
 338
 339      The relocs are always passed as Rela structures; if the section
 340      actually uses Rel structures, the r_addend field will always be
 341      zero.
 342
 343      This function is responsible for adjust the section contents as
 344      necessary, and (if using Rela relocs and generating a
 345      relocateable output file) adjusting the reloc addend as
 346      necessary.
 347
 348      This function does not have to worry about setting the reloc
 349      address or the reloc symbol index.
 350
 351      LOCAL_SYMS is a pointer to the swapped in local symbols.
 352
 353      LOCAL_SECTIONS is an array giving the section in the input file
 354      corresponding to the st_shndx field of each local symbol.
 355
 356      The global hash table entry for the global symbols can be found
 357      via elf_sym_hashes (input_bfd).
 358
 359      When generating relocateable output, this function must handle
 360      STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
 361      going to be the section symbol corresponding to the output
 362      section, which means that the addend must be adjusted
 363      accordingly.  */
 364   boolean (*elf_backend_relocate_section)
 365     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 366              bfd *input_bfd, asection *input_section, bfd_byte *contents,
 367              Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
 368              asection **local_sections));
 369
 370   /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
 371      linker just before it writes a symbol out to the .dynsym section.
 372      The processor backend may make any required adjustment to the
 373      symbol.  It may also take the opportunity to set contents of the
 374      dynamic sections.  Note that FINISH_DYNAMIC_SYMBOL is called on
 375      all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
 376      on those symbols which are defined by a dynamic object.  */
 377   boolean (*elf_backend_finish_dynamic_symbol)
 378     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 379              struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
 380
 381   /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
 382      linker just before it writes all the dynamic sections out to the
 383      output file.  The FINISH_DYNAMIC_SYMBOL will have been called on
 384      all dynamic symbols.  */
 385   boolean (*elf_backend_finish_dynamic_sections)
 386     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 387
 388   /* A function to do any beginning processing needed for the ELF file
 389      before building the ELF headers and computing file positions.  */
 390   void (*elf_backend_begin_write_processing)
 391     PARAMS ((bfd *, struct bfd_link_info *));
 392
 393   /* A function to do any final processing needed for the ELF file
 394      before writing it out.  The LINKER argument is true if this BFD
 395      was created by the ELF backend linker.  */
 396   void (*elf_backend_final_write_processing)
 397     PARAMS ((bfd *, boolean linker));
 398
 399   /* The swapping table to use when dealing with ECOFF information.
 400      Used for the MIPS ELF .mdebug section.  */
 401   const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
 402
 403   /* Alternate EM_xxxx machine codes for this backend.  */
 404   int elf_machine_alt1;
 405   int elf_machine_alt2;
 406 };
 407
 408 /* Information stored for each BFD section in an ELF file.  This
 409    structure is allocated by elf_new_section_hook.  */
 410
 411 struct bfd_elf_section_data {
 412   /* The ELF header for this section.  */
 413   Elf_Internal_Shdr this_hdr;
 414   /* The ELF header for the reloc section associated with this
 415      section, if any.  */
 416   Elf_Internal_Shdr rel_hdr;
 417   /* The ELF section number of this section.  Only used for an output
 418      file.  */
 419   int this_idx;
 420   /* The ELF section number of the reloc section associated with this
 421      section, if any.  Only used for an output file.  */
 422   int rel_idx;
 423   /* Used by the backend linker to store the symbol hash table entries
 424      associated with relocs against global symbols.  */
 425   struct elf_link_hash_entry **rel_hashes;
 426   /* A pointer to the swapped relocs.  If the section uses REL relocs,
 427      rather than RELA, all the r_addend fields will be zero.  This
 428      pointer may be NULL.  It is used by the backend linker.  */
 429   Elf_Internal_Rela *relocs;
 430   /* Used by the backend linker when generating a shared library to
 431      record the dynamic symbol index for a section symbol
 432      corresponding to this section.  */
 433   long dynindx;
 434 };
 435
 436 #define elf_section_data(sec)  ((struct bfd_elf_section_data*)sec->used_by_bfd)
 437
 438 #define get_elf_backend_data(abfd) \
 439   ((struct elf_backend_data *) (abfd)->xvec->backend_data)
 440
 441 /* Some private data is stashed away for future use using the tdata pointer
 442    in the bfd structure.  */
 443
 444 struct elf_obj_tdata
 445 {
 446   Elf_Internal_Ehdr elf_header[1];      /* Actual data, but ref like ptr */
 447   Elf_Internal_Shdr **elf_sect_ptr;
 448   Elf_Internal_Phdr *phdr;
 449   struct bfd_strtab_hash *strtab_ptr;
 450   int num_locals;
 451   int num_globals;
 452   asymbol **section_syms;       /* STT_SECTION symbols for each section */
 453   Elf_Internal_Shdr symtab_hdr;
 454   Elf_Internal_Shdr shstrtab_hdr;
 455   Elf_Internal_Shdr strtab_hdr;
 456   Elf_Internal_Shdr dynsymtab_hdr;
 457   Elf_Internal_Shdr dynstrtab_hdr;
 458   int symtab_section, shstrtab_section, strtab_section, dynsymtab_section;
 459   file_ptr next_file_pos;
 460   void *prstatus;               /* The raw /proc prstatus structure */
 461   void *prpsinfo;               /* The raw /proc prpsinfo structure */
 462   bfd_vma gp;                   /* The gp value (MIPS only, for now) */
 463   int gp_size;                  /* The gp size (MIPS only, for now) */
 464
 465   /* This is set to true if the object was created by the backend
 466      linker.  */
 467   boolean linker;
 468
 469   /* A mapping from external symbols to entries in the linker hash
 470      table, used when linking.  This is indexed by the symbol index
 471      minus the sh_info field of the symbol table header.  */
 472   struct elf_link_hash_entry **sym_hashes;
 473
 474   /* A mapping from local symbols to offsets into the global offset
 475      table, used when linking.  This is indexed by the symbol index.  */
 476   bfd_vma *local_got_offsets;
 477
 478   /* The linker ELF emulation code needs to let the backend ELF linker
 479      know what filename should be used for a dynamic object if the
 480      dynamic object is found using a search.  This field is used to
 481      hold that information.  */
 482   const char *dt_needed_name;
 483
 484   /* Irix 5 often screws up the symbol table, sorting local symbols
 485      after global symbols.  This flag is set if the symbol table in
 486      this BFD appears to be screwed up.  If it is, we ignore the
 487      sh_info field in the symbol table header, and always read all the
 488      symbols.  */
 489   boolean bad_symtab;
 490
 491   /* Records the result of `get_program_header_size'.  */
 492   bfd_size_type program_header_size;
 493 };
 494
 495 #define elf_tdata(bfd)          ((bfd) -> tdata.elf_obj_data)
 496 #define elf_elfheader(bfd)      (elf_tdata(bfd) -> elf_header)
 497 #define elf_elfsections(bfd)    (elf_tdata(bfd) -> elf_sect_ptr)
 498 #define elf_shstrtab(bfd)       (elf_tdata(bfd) -> strtab_ptr)
 499 #define elf_onesymtab(bfd)      (elf_tdata(bfd) -> symtab_section)
 500 #define elf_dynsymtab(bfd)      (elf_tdata(bfd) -> dynsymtab_section)
 501 #define elf_num_locals(bfd)     (elf_tdata(bfd) -> num_locals)
 502 #define elf_num_globals(bfd)    (elf_tdata(bfd) -> num_globals)
 503 #define elf_section_syms(bfd)   (elf_tdata(bfd) -> section_syms)
 504 #define core_prpsinfo(bfd)      (elf_tdata(bfd) -> prpsinfo)
 505 #define core_prstatus(bfd)      (elf_tdata(bfd) -> prstatus)
 506 #define elf_gp(bfd)             (elf_tdata(bfd) -> gp)
 507 #define elf_gp_size(bfd)        (elf_tdata(bfd) -> gp_size)
 508 #define elf_sym_hashes(bfd)     (elf_tdata(bfd) -> sym_hashes)
 509 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets)
 510 #define elf_dt_needed_name(bfd) (elf_tdata(bfd) -> dt_needed_name)
 511 #define elf_bad_symtab(bfd)     (elf_tdata(bfd) -> bad_symtab)
 512 \f
 513 extern char * elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
 514 extern char * elf_get_str_section PARAMS ((bfd *, unsigned));
 515
 516 extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *,
 517                                           bfd_print_symbol_type));
 518
 519 #define bfd_elf32_print_symbol  bfd_elf_print_symbol
 520 #define bfd_elf64_print_symbol  bfd_elf_print_symbol
 521 #define bfd_elf32_mkobject      bfd_elf_mkobject
 522 #define bfd_elf64_mkobject      bfd_elf_mkobject
 523 #define elf_mkobject            bfd_elf_mkobject
 524
 525 extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *));
 526
 527 extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *,
 528                                                             arelent *,
 529                                                             asymbol *,
 530                                                             PTR,
 531                                                             asection *,
 532                                                             bfd *,
 533                                                             char **));
 534 extern boolean bfd_elf_mkobject PARAMS ((bfd *));
 535 extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
 536 extern boolean _bfd_elf_make_section_from_shdr
 537   PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
 538 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
 539   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 540 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
 541   PARAMS ((bfd *));
 542 extern boolean _bfd_elf_link_hash_table_init
 543   PARAMS ((struct elf_link_hash_table *, bfd *,
 544            struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 545                                        struct bfd_hash_table *,
 546                                        const char *)));
 547
 548 extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
 549 extern boolean bfd_elf64_write_object_contents PARAMS ((bfd *));
 550
 551 extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
 552 extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
 553 extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
 554 extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
 555 extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
 556                                                                  bfd *));
 557 extern boolean bfd_elf32_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
 558                                                        file_ptr,
 559                                                        bfd_size_type));
 560
 561 extern long bfd_elf32_get_symtab_upper_bound PARAMS ((bfd *));
 562 extern long bfd_elf32_get_symtab PARAMS ((bfd *, asymbol **));
 563 extern long bfd_elf32_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
 564 extern long bfd_elf32_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
 565 extern long bfd_elf32_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 566 extern long bfd_elf32_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 567                                                   arelent **, asymbol **));
 568 extern asymbol *bfd_elf32_make_empty_symbol PARAMS ((bfd *));
 569 extern void bfd_elf32_get_symbol_info PARAMS ((bfd *, asymbol *,
 570                                                symbol_info *));
 571 extern alent *bfd_elf32_get_lineno PARAMS ((bfd *, asymbol *));
 572 extern boolean bfd_elf32_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 573                                                 unsigned long));
 574 extern boolean bfd_elf32_find_nearest_line PARAMS ((bfd *, asection *,
 575                                                     asymbol **,
 576                                                     bfd_vma, CONST char **,
 577                                                     CONST char **,
 578                                                     unsigned int *));
 579 extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
 580 extern void bfd_elf32__write_relocs PARAMS ((bfd *, asection *, PTR));
 581 extern boolean bfd_elf32_new_section_hook PARAMS ((bfd *, asection *));
 582 extern boolean bfd_elf32_bfd_link_add_symbols
 583   PARAMS ((bfd *, struct bfd_link_info *));
 584 extern boolean bfd_elf32_bfd_final_link
 585   PARAMS ((bfd *, struct bfd_link_info *));
 586
 587 extern void bfd_elf32_swap_symbol_in
 588   PARAMS ((bfd *, Elf32_External_Sym *, Elf_Internal_Sym *));
 589 extern void bfd_elf32_swap_symbol_out
 590   PARAMS ((bfd *, Elf_Internal_Sym *, Elf32_External_Sym *));
 591 extern void bfd_elf32_swap_reloc_in
 592   PARAMS ((bfd *, Elf32_External_Rel *, Elf_Internal_Rel *));
 593 extern void bfd_elf32_swap_reloc_out
 594   PARAMS ((bfd *, Elf_Internal_Rel *, Elf32_External_Rel *));
 595 extern void bfd_elf32_swap_reloca_in
 596   PARAMS ((bfd *, Elf32_External_Rela *, Elf_Internal_Rela *));
 597 extern void bfd_elf32_swap_reloca_out
 598   PARAMS ((bfd *, Elf_Internal_Rela *, Elf32_External_Rela *));
 599 extern void bfd_elf32_swap_dyn_in
 600   PARAMS ((bfd *, const Elf32_External_Dyn *, Elf_Internal_Dyn *));
 601 extern void bfd_elf32_swap_dyn_out
 602   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *));
 603 extern boolean bfd_elf32_add_dynamic_entry
 604   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 605 extern boolean bfd_elf32_link_create_dynamic_sections
 606   PARAMS ((bfd *, struct bfd_link_info *));
 607 extern boolean bfd_elf32_link_record_dynamic_symbol
 608   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
 609
 610 /* If the target doesn't have reloc handling written yet:  */
 611 extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
 612                                                 Elf32_Internal_Rela *));
 613
 614 extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
 615 extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
 616 extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
 617 extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
 618 extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
 619                                                                  bfd *));
 620 extern boolean bfd_elf64_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
 621                                                        file_ptr,
 622                                                        bfd_size_type));
 623
 624 extern long bfd_elf64_get_symtab_upper_bound PARAMS ((bfd *));
 625 extern long bfd_elf64_get_symtab PARAMS ((bfd *, asymbol **));
 626 extern long bfd_elf64_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
 627 extern long bfd_elf64_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
 628 extern long bfd_elf64_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 629 extern long bfd_elf64_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 630                                                   arelent **, asymbol **));
 631 extern asymbol *bfd_elf64_make_empty_symbol PARAMS ((bfd *));
 632 extern void bfd_elf64_get_symbol_info PARAMS ((bfd *, asymbol *,
 633                                                symbol_info *));
 634 extern alent *bfd_elf64_get_lineno PARAMS ((bfd *, asymbol *));
 635 extern boolean bfd_elf64_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 636                                                 unsigned long));
 637 extern boolean bfd_elf64_find_nearest_line PARAMS ((bfd *, asection *,
 638                                                     asymbol **,
 639                                                     bfd_vma, CONST char **,
 640                                                     CONST char **,
 641                                                     unsigned int *));
 642 extern int bfd_elf64_sizeof_headers PARAMS ((bfd *, boolean));
 643 extern void bfd_elf64__write_relocs PARAMS ((bfd *, asection *, PTR));
 644 extern boolean bfd_elf64_new_section_hook PARAMS ((bfd *, asection *));
 645 extern boolean bfd_elf64_bfd_link_add_symbols
 646   PARAMS ((bfd *, struct bfd_link_info *));
 647 extern boolean bfd_elf64_bfd_final_link
 648   PARAMS ((bfd *, struct bfd_link_info *));
 649
 650 extern void bfd_elf64_swap_symbol_in
 651   PARAMS ((bfd *, Elf64_External_Sym *, Elf_Internal_Sym *));
 652 extern void bfd_elf64_swap_symbol_out
 653   PARAMS ((bfd *, Elf_Internal_Sym *, Elf64_External_Sym *));
 654 extern void bfd_elf64_swap_reloc_in
 655   PARAMS ((bfd *, Elf64_External_Rel *, Elf_Internal_Rel *));
 656 extern void bfd_elf64_swap_reloc_out
 657   PARAMS ((bfd *, Elf_Internal_Rel *, Elf64_External_Rel *));
 658 extern void bfd_elf64_swap_reloca_in
 659   PARAMS ((bfd *, Elf64_External_Rela *, Elf_Internal_Rela *));
 660 extern void bfd_elf64_swap_reloca_out
 661   PARAMS ((bfd *, Elf_Internal_Rela *, Elf64_External_Rela *));
 662 extern void bfd_elf64_swap_dyn_in
 663   PARAMS ((bfd *, const Elf64_External_Dyn *, Elf_Internal_Dyn *));
 664 extern void bfd_elf64_swap_dyn_out
 665   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *));
 666 extern boolean bfd_elf64_add_dynamic_entry
 667   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 668 extern boolean bfd_elf64_link_create_dynamic_sections
 669   PARAMS ((bfd *, struct bfd_link_info *));
 670 extern boolean bfd_elf64_link_record_dynamic_symbol
 671   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
 672
 673 /* If the target doesn't have reloc handling written yet:  */
 674 extern void bfd_elf64_no_info_to_howto PARAMS ((bfd *, arelent *,
 675                                                 Elf64_Internal_Rela *));
 676
 677 #endif /* _LIBELF_H_ */