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   /* Symbol needs a procedure linkage table entry.  */
 125 #define ELF_LINK_HASH_NEEDS_PLT 0200
 126 };
 127
 128 /* ELF linker hash table.  */
 129
 130 struct elf_link_hash_table
 131 {
 132   struct bfd_link_hash_table root;
 133   /* Whether we have created the special dynamic sections required
 134      when linking against or generating a shared object.  */
 135   boolean dynamic_sections_created;
 136   /* The BFD used to hold special sections created by the linker.
 137      This will be the first BFD found which requires these sections to
 138      be created.  */
 139   bfd *dynobj;
 140   /* The number of symbols found in the link which must be put into
 141      the .dynsym section.  */
 142   size_t dynsymcount;
 143   /* The string table of dynamic symbols, which becomes the .dynstr
 144      section.  */
 145   struct bfd_strtab_hash *dynstr;
 146   /* The number of buckets in the hash table in the .hash section.
 147      This is based on the number of dynamic symbols.  */
 148   size_t bucketcount;
 149 };
 150
 151 /* Look up an entry in an ELF linker hash table.  */
 152
 153 #define elf_link_hash_lookup(table, string, create, copy, follow)       \
 154   ((struct elf_link_hash_entry *)                                       \
 155    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 156                          (copy), (follow)))
 157
 158 /* Traverse an ELF linker hash table.  */
 159
 160 #define elf_link_hash_traverse(table, func, info)                       \
 161   (bfd_link_hash_traverse                                               \
 162    (&(table)->root,                                                     \
 163     (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \
 164     (info)))
 165
 166 /* Get the ELF linker hash table from a link_info structure.  */
 167
 168 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
 169 \f
 170 /* Constant information held for an ELF backend.  */
 171
 172 struct elf_backend_data
 173 {
 174   /* Whether the backend uses REL or RELA relocations.  FIXME: some
 175      ELF backends use both.  When we need to support one, this whole
 176      approach will need to be changed.  */
 177   int use_rela_p;
 178
 179   /* Whether this backend is 64 bits or not.  FIXME: Who cares?  */
 180   int elf_64_p;
 181
 182   /* The architecture for this backend.  */
 183   enum bfd_architecture arch;
 184
 185   /* The ELF machine code (EM_xxxx) for this backend.  */
 186   int elf_machine_code;
 187
 188   /* The maximum page size for this backend.  */
 189   bfd_vma maxpagesize;
 190
 191   /* This is true if the linker should act like collect and gather
 192      global constructors and destructors by name.  This is true for
 193      MIPS ELF because the Irix 5 tools can not handle the .init
 194      section.  */
 195   boolean collect;
 196
 197   /* A function to translate an ELF RELA relocation to a BFD arelent
 198      structure.  */
 199   void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
 200                                      Elf_Internal_Rela *));
 201
 202   /* A function to translate an ELF REL relocation to a BFD arelent
 203      structure.  */
 204   void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
 205                                          Elf_Internal_Rel *));
 206
 207   /* A function to determine whether a symbol is global when
 208      partitioning the symbol table into local and global symbols.
 209      This should be NULL for most targets, in which case the correct
 210      thing will be done.  MIPS ELF, at least on the Irix 5, has
 211      special requirements.  */
 212   boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *));
 213
 214   /* The remaining functions are hooks which are called only if they
 215      are not NULL.  */
 216
 217   /* A function to permit a backend specific check on whether a
 218      particular BFD format is relevant for an object file, and to
 219      permit the backend to set any global information it wishes.  When
 220      this is called elf_elfheader is set, but anything else should be
 221      used with caution.  If this returns false, the check_format
 222      routine will return a bfd_error_wrong_format error.  */
 223   boolean (*elf_backend_object_p) PARAMS ((bfd *));
 224
 225   /* A function to do additional symbol processing when reading the
 226      ELF symbol table.  This is where any processor-specific special
 227      section indices are handled.  */
 228   void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *));
 229
 230   /* A function to do additional symbol processing after reading the
 231      entire ELF symbol table.  */
 232   boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *,
 233                                                           elf_symbol_type *,
 234                                                           int));
 235
 236   /* A function to do additional processing on the ELF section header
 237      just before writing it out.  This is used to set the flags and
 238      type fields for some sections, or to actually write out data for
 239      unusual sections.  */
 240   boolean (*elf_backend_section_processing) PARAMS ((bfd *,
 241                                                      Elf32_Internal_Shdr *));
 242
 243   /* A function to handle unusual section types when creating BFD
 244      sections from ELF sections.  */
 245   boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *,
 246                                                     Elf32_Internal_Shdr *,
 247                                                     char *));
 248
 249   /* A function to set up the ELF section header for a BFD section in
 250      preparation for writing it out.  This is where the flags and type
 251      fields are set for unusual sections.  */
 252   boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *,
 253                                                 asection *));
 254
 255   /* A function to get the ELF section index for a BFD section.  If
 256      this returns true, the section was found.  If it is a normal ELF
 257      section, *RETVAL should be left unchanged.  If it is not a normal
 258      ELF section *RETVAL should be set to the SHN_xxxx index.  */
 259   boolean (*elf_backend_section_from_bfd_section)
 260     PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
 261
 262   /* If this field is not NULL, it is called by the add_symbols phase
 263      of a link just before adding a symbol to the global linker hash
 264      table.  It may modify any of the fields as it wishes.  If *NAME
 265      is set to NULL, the symbol will be skipped rather than being
 266      added to the hash table.  This function is responsible for
 267      handling all processor dependent symbol bindings and section
 268      indices, and must set at least *FLAGS and *SEC for each processor
 269      dependent case; failure to do so will cause a link error.  */
 270   boolean (*elf_add_symbol_hook)
 271     PARAMS ((bfd *abfd, struct bfd_link_info *info,
 272              const Elf_Internal_Sym *, const char **name,
 273              flagword *flags, asection **sec, bfd_vma *value));
 274
 275   /* If this field is not NULL, it is called by the elf_link_output_sym
 276      phase of a link for each symbol which will appear in the object file.  */
 277   boolean (*elf_backend_link_output_symbol_hook)
 278     PARAMS ((bfd *, struct bfd_link_info *info, const char *,
 279              Elf_Internal_Sym *, asection *));
 280
 281   /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
 282      linker the first time it encounters a dynamic object in the link.
 283      This function must create any sections required for dynamic
 284      linking.  The ABFD argument is a dynamic object.  The .interp,
 285      .dynamic, .dynsym, .dynstr, and .hash functions have already been
 286      created, and this function may modify the section flags if
 287      desired.  This function will normally create the .got and .plt
 288      sections, but different backends have different requirements.  */
 289   boolean (*elf_backend_create_dynamic_sections)
 290     PARAMS ((bfd *abfd, struct bfd_link_info *info));
 291
 292   /* The CHECK_RELOCS function is called by the add_symbols phase of
 293      the ELF backend linker.  It is called once for each section with
 294      relocs of an object file, just after the symbols for the object
 295      file have been added to the global linker hash table.  The
 296      function must look through the relocs and do any special handling
 297      required.  This generally means allocating space in the global
 298      offset table, and perhaps allocating space for a reloc.  The
 299      relocs are always passed as Rela structures; if the section
 300      actually uses Rel structures, the r_addend field will always be
 301      zero.  */
 302   boolean (*check_relocs)
 303     PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
 304              const Elf_Internal_Rela *relocs));
 305
 306   /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
 307      linker for every symbol which is defined by a dynamic object and
 308      referenced by a regular object.  This is called after all the
 309      input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
 310      function has been called.  The hash table entry should be
 311      bfd_link_hash_defined, and it should be defined in a section from
 312      a dynamic object.  Dynamic object sections are not included in
 313      the final link, and this function is responsible for changing the
 314      value to something which the rest of the link can deal with.
 315      This will normally involve adding an entry to the .plt or .got or
 316      some such section, and setting the symbol to point to that.  */
 317   boolean (*elf_backend_adjust_dynamic_symbol)
 318     PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
 319
 320   /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
 321      linker after all the linker input files have been seen but before
 322      the sections sizes have been set.  This is called after
 323      ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
 324      It is only called when linking against a dynamic object.  It must
 325      set the sizes of the dynamic sections, and may fill in their
 326      contents as well.  The generic ELF linker can handle the .dynsym,
 327      .dynstr and .hash sections.  This function must handle the
 328      .interp section and any sections created by the
 329      CREATE_DYNAMIC_SECTIONS entry point.  */
 330   boolean (*elf_backend_size_dynamic_sections)
 331     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 332
 333   /* The RELOCATE_SECTION function is called by the ELF backend linker
 334      to handle the relocations for a section.
 335
 336      The relocs are always passed as Rela structures; if the section
 337      actually uses Rel structures, the r_addend field will always be
 338      zero.
 339
 340      This function is responsible for adjust the section contents as
 341      necessary, and (if using Rela relocs and generating a
 342      relocateable output file) adjusting the reloc addend as
 343      necessary.
 344
 345      This function does not have to worry about setting the reloc
 346      address or the reloc symbol index.
 347
 348      LOCAL_SYMS is a pointer to the swapped in local symbols.
 349
 350      LOCAL_SECTIONS is an array giving the section in the input file
 351      corresponding to the st_shndx field of each local symbol.
 352
 353      The global hash table entry for the global symbols can be found
 354      via elf_sym_hashes (input_bfd).
 355
 356      When generating relocateable output, this function must handle
 357      STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
 358      going to be the section symbol corresponding to the output
 359      section, which means that the addend must be adjusted
 360      accordingly.  */
 361   boolean (*elf_backend_relocate_section)
 362     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 363              bfd *input_bfd, asection *input_section, bfd_byte *contents,
 364              Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
 365              asection **local_sections));
 366
 367   /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
 368      linker just before it writes a symbol out to the .dynsym section.
 369      The processor backend may make any required adjustment to the
 370      symbol.  It may also take the opportunity to set contents of the
 371      dynamic sections.  Note that FINISH_DYNAMIC_SYMBOL is called on
 372      all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
 373      on those symbols which are defined by a dynamic object.  */
 374   boolean (*elf_backend_finish_dynamic_symbol)
 375     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 376              struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
 377
 378   /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
 379      linker just before it writes all the dynamic sections out to the
 380      output file.  The FINISH_DYNAMIC_SYMBOL will have been called on
 381      all dynamic symbols.  */
 382   boolean (*elf_backend_finish_dynamic_sections)
 383     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 384
 385   /* A function to do any beginning processing needed for the ELF file
 386      before building the ELF headers and computing file positions.  */
 387   void (*elf_backend_begin_write_processing)
 388     PARAMS ((bfd *, struct bfd_link_info *));
 389
 390   /* A function to do any final processing needed for the ELF file
 391      before writing it out.  The LINKER argument is true if this BFD
 392      was created by the ELF backend linker.  */
 393   void (*elf_backend_final_write_processing)
 394     PARAMS ((bfd *, boolean linker));
 395
 396   /* The swapping table to use when dealing with ECOFF information.
 397      Used for the MIPS ELF .mdebug section.  */
 398   const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
 399 };
 400
 401 /* Information stored for each BFD section in an ELF file.  This
 402    structure is allocated by elf_new_section_hook.  */
 403
 404 struct bfd_elf_section_data {
 405   /* The ELF header for this section.  */
 406   Elf_Internal_Shdr this_hdr;
 407   /* The ELF header for the reloc section associated with this
 408      section, if any.  */
 409   Elf_Internal_Shdr rel_hdr;
 410   /* The ELF section number of this section.  Only used for an output
 411      file.  */
 412   int this_idx;
 413   /* The ELF section number of the reloc section associated with this
 414      section, if any.  Only used for an output file.  */
 415   int rel_idx;
 416   /* Used by the backend linker to store the symbol hash table entries
 417      associated with relocs against global symbols.  */
 418   struct elf_link_hash_entry **rel_hashes;
 419   /* A pointer to the swapped relocs.  If the section uses REL relocs,
 420      rather than RELA, all the r_addend fields will be zero.  This
 421      pointer may be NULL.  It is used by the backend linker.  */
 422   Elf_Internal_Rela *relocs;
 423   /* Used by the backend linker when generating a shared library to
 424      record the dynamic symbol index for a section symbol
 425      corresponding to this section.  */
 426   long dynindx;
 427 };
 428
 429 #define elf_section_data(sec)  ((struct bfd_elf_section_data*)sec->used_by_bfd)
 430
 431 #define get_elf_backend_data(abfd) \
 432   ((struct elf_backend_data *) (abfd)->xvec->backend_data)
 433
 434 /* Some private data is stashed away for future use using the tdata pointer
 435    in the bfd structure.  */
 436
 437 struct elf_obj_tdata
 438 {
 439   Elf_Internal_Ehdr elf_header[1];      /* Actual data, but ref like ptr */
 440   Elf_Internal_Shdr **elf_sect_ptr;
 441   Elf_Internal_Phdr *phdr;
 442   struct bfd_strtab_hash *strtab_ptr;
 443   int num_locals;
 444   int num_globals;
 445   asymbol **section_syms;       /* STT_SECTION symbols for each section */
 446   Elf_Internal_Shdr symtab_hdr;
 447   Elf_Internal_Shdr shstrtab_hdr;
 448   Elf_Internal_Shdr strtab_hdr;
 449   Elf_Internal_Shdr dynsymtab_hdr;
 450   Elf_Internal_Shdr dynstrtab_hdr;
 451   int symtab_section, shstrtab_section, strtab_section, dynsymtab_section;
 452   file_ptr next_file_pos;
 453   void *prstatus;               /* The raw /proc prstatus structure */
 454   void *prpsinfo;               /* The raw /proc prpsinfo structure */
 455   bfd_vma gp;                   /* The gp value (MIPS only, for now) */
 456   int gp_size;                  /* The gp size (MIPS only, for now) */
 457
 458   /* This is set to true if the object was created by the backend
 459      linker.  */
 460   boolean linker;
 461
 462   /* A mapping from external symbols to entries in the linker hash
 463      table, used when linking.  This is indexed by the symbol index
 464      minus the sh_info field of the symbol table header.  */
 465   struct elf_link_hash_entry **sym_hashes;
 466
 467   /* A mapping from local symbols to offsets into the global offset
 468      table, used when linking.  This is indexed by the symbol index.  */
 469   bfd_vma *local_got_offsets;
 470
 471   /* The linker ELF emulation code needs to let the backend ELF linker
 472      know what filename should be used for a dynamic object if the
 473      dynamic object is found using a search.  This field is used to
 474      hold that information.  */
 475   const char *dt_needed_name;
 476
 477   /* Irix 5 often screws up the symbol table, sorting local symbols
 478      after global symbols.  This flag is set if the symbol table in
 479      this BFD appears to be screwed up.  If it is, we ignore the
 480      sh_info field in the symbol table header, and always read all the
 481      symbols.  */
 482   boolean bad_symtab;
 483 };
 484
 485 #define elf_tdata(bfd)          ((bfd) -> tdata.elf_obj_data)
 486 #define elf_elfheader(bfd)      (elf_tdata(bfd) -> elf_header)
 487 #define elf_elfsections(bfd)    (elf_tdata(bfd) -> elf_sect_ptr)
 488 #define elf_shstrtab(bfd)       (elf_tdata(bfd) -> strtab_ptr)
 489 #define elf_onesymtab(bfd)      (elf_tdata(bfd) -> symtab_section)
 490 #define elf_dynsymtab(bfd)      (elf_tdata(bfd) -> dynsymtab_section)
 491 #define elf_num_locals(bfd)     (elf_tdata(bfd) -> num_locals)
 492 #define elf_num_globals(bfd)    (elf_tdata(bfd) -> num_globals)
 493 #define elf_section_syms(bfd)   (elf_tdata(bfd) -> section_syms)
 494 #define core_prpsinfo(bfd)      (elf_tdata(bfd) -> prpsinfo)
 495 #define core_prstatus(bfd)      (elf_tdata(bfd) -> prstatus)
 496 #define elf_gp(bfd)             (elf_tdata(bfd) -> gp)
 497 #define elf_gp_size(bfd)        (elf_tdata(bfd) -> gp_size)
 498 #define elf_sym_hashes(bfd)     (elf_tdata(bfd) -> sym_hashes)
 499 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets)
 500 #define elf_dt_needed_name(bfd) (elf_tdata(bfd) -> dt_needed_name)
 501 #define elf_bad_symtab(bfd)     (elf_tdata(bfd) -> bad_symtab)
 502 \f
 503 extern char * elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
 504 extern char * elf_get_str_section PARAMS ((bfd *, unsigned));
 505
 506 extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *,
 507                                           bfd_print_symbol_type));
 508
 509 #define bfd_elf32_print_symbol  bfd_elf_print_symbol
 510 #define bfd_elf64_print_symbol  bfd_elf_print_symbol
 511 #define bfd_elf32_mkobject      bfd_elf_mkobject
 512 #define bfd_elf64_mkobject      bfd_elf_mkobject
 513 #define elf_mkobject            bfd_elf_mkobject
 514
 515 extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *));
 516
 517 extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *,
 518                                                             arelent *,
 519                                                             asymbol *,
 520                                                             PTR,
 521                                                             asection *,
 522                                                             bfd *,
 523                                                             char **));
 524 extern boolean bfd_elf_mkobject PARAMS ((bfd *));
 525 extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
 526 extern boolean _bfd_elf_make_section_from_shdr
 527   PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
 528 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
 529   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 530 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
 531   PARAMS ((bfd *));
 532 extern boolean _bfd_elf_link_hash_table_init
 533   PARAMS ((struct elf_link_hash_table *, bfd *,
 534            struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 535                                        struct bfd_hash_table *,
 536                                        const char *)));
 537
 538 extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
 539 extern boolean bfd_elf64_write_object_contents PARAMS ((bfd *));
 540
 541 extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
 542 extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
 543 extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
 544 extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
 545 extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
 546                                                                  bfd *));
 547 extern boolean bfd_elf32_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
 548                                                        file_ptr,
 549                                                        bfd_size_type));
 550
 551 extern long bfd_elf32_get_symtab_upper_bound PARAMS ((bfd *));
 552 extern long bfd_elf32_get_symtab PARAMS ((bfd *, asymbol **));
 553 extern long bfd_elf32_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
 554 extern long bfd_elf32_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
 555 extern long bfd_elf32_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 556 extern long bfd_elf32_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 557                                                   arelent **, asymbol **));
 558 extern asymbol *bfd_elf32_make_empty_symbol PARAMS ((bfd *));
 559 extern void bfd_elf32_get_symbol_info PARAMS ((bfd *, asymbol *,
 560                                                symbol_info *));
 561 extern alent *bfd_elf32_get_lineno PARAMS ((bfd *, asymbol *));
 562 extern boolean bfd_elf32_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 563                                                 unsigned long));
 564 extern boolean bfd_elf32_find_nearest_line PARAMS ((bfd *, asection *,
 565                                                     asymbol **,
 566                                                     bfd_vma, CONST char **,
 567                                                     CONST char **,
 568                                                     unsigned int *));
 569 extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
 570 extern void bfd_elf32__write_relocs PARAMS ((bfd *, asection *, PTR));
 571 extern boolean bfd_elf32_new_section_hook PARAMS ((bfd *, asection *));
 572 extern boolean bfd_elf32_bfd_link_add_symbols
 573   PARAMS ((bfd *, struct bfd_link_info *));
 574 extern boolean bfd_elf32_bfd_final_link
 575   PARAMS ((bfd *, struct bfd_link_info *));
 576
 577 extern void bfd_elf32_swap_symbol_in
 578   PARAMS ((bfd *, Elf32_External_Sym *, Elf_Internal_Sym *));
 579 extern void bfd_elf32_swap_symbol_out
 580   PARAMS ((bfd *, Elf_Internal_Sym *, Elf32_External_Sym *));
 581 extern void bfd_elf32_swap_reloc_in
 582   PARAMS ((bfd *, Elf32_External_Rel *, Elf_Internal_Rel *));
 583 extern void bfd_elf32_swap_reloc_out
 584   PARAMS ((bfd *, Elf_Internal_Rel *, Elf32_External_Rel *));
 585 extern void bfd_elf32_swap_reloca_in
 586   PARAMS ((bfd *, Elf32_External_Rela *, Elf_Internal_Rela *));
 587 extern void bfd_elf32_swap_reloca_out
 588   PARAMS ((bfd *, Elf_Internal_Rela *, Elf32_External_Rela *));
 589 extern void bfd_elf32_swap_dyn_in
 590   PARAMS ((bfd *, const Elf32_External_Dyn *, Elf_Internal_Dyn *));
 591 extern void bfd_elf32_swap_dyn_out
 592   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *));
 593 extern boolean bfd_elf32_add_dynamic_entry
 594   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 595 extern boolean bfd_elf32_link_create_dynamic_sections
 596   PARAMS ((bfd *, struct bfd_link_info *));
 597 extern boolean bfd_elf32_link_record_dynamic_symbol
 598   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
 599
 600 /* If the target doesn't have reloc handling written yet:  */
 601 extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
 602                                                 Elf32_Internal_Rela *));
 603
 604 extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
 605 extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
 606 extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
 607 extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
 608 extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
 609                                                                  bfd *));
 610 extern boolean bfd_elf64_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
 611                                                        file_ptr,
 612                                                        bfd_size_type));
 613
 614 extern long bfd_elf64_get_symtab_upper_bound PARAMS ((bfd *));
 615 extern long bfd_elf64_get_symtab PARAMS ((bfd *, asymbol **));
 616 extern long bfd_elf64_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
 617 extern long bfd_elf64_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
 618 extern long bfd_elf64_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 619 extern long bfd_elf64_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 620                                                   arelent **, asymbol **));
 621 extern asymbol *bfd_elf64_make_empty_symbol PARAMS ((bfd *));
 622 extern void bfd_elf64_get_symbol_info PARAMS ((bfd *, asymbol *,
 623                                                symbol_info *));
 624 extern alent *bfd_elf64_get_lineno PARAMS ((bfd *, asymbol *));
 625 extern boolean bfd_elf64_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 626                                                 unsigned long));
 627 extern boolean bfd_elf64_find_nearest_line PARAMS ((bfd *, asection *,
 628                                                     asymbol **,
 629                                                     bfd_vma, CONST char **,
 630                                                     CONST char **,
 631                                                     unsigned int *));
 632 extern int bfd_elf64_sizeof_headers PARAMS ((bfd *, boolean));
 633 extern void bfd_elf64__write_relocs PARAMS ((bfd *, asection *, PTR));
 634 extern boolean bfd_elf64_new_section_hook PARAMS ((bfd *, asection *));
 635 extern boolean bfd_elf64_bfd_link_add_symbols
 636   PARAMS ((bfd *, struct bfd_link_info *));
 637 extern boolean bfd_elf64_bfd_final_link
 638   PARAMS ((bfd *, struct bfd_link_info *));
 639
 640 extern void bfd_elf64_swap_symbol_in
 641   PARAMS ((bfd *, Elf64_External_Sym *, Elf_Internal_Sym *));
 642 extern void bfd_elf64_swap_symbol_out
 643   PARAMS ((bfd *, Elf_Internal_Sym *, Elf64_External_Sym *));
 644 extern void bfd_elf64_swap_reloc_in
 645   PARAMS ((bfd *, Elf64_External_Rel *, Elf_Internal_Rel *));
 646 extern void bfd_elf64_swap_reloc_out
 647   PARAMS ((bfd *, Elf_Internal_Rel *, Elf64_External_Rel *));
 648 extern void bfd_elf64_swap_reloca_in
 649   PARAMS ((bfd *, Elf64_External_Rela *, Elf_Internal_Rela *));
 650 extern void bfd_elf64_swap_reloca_out
 651   PARAMS ((bfd *, Elf_Internal_Rela *, Elf64_External_Rela *));
 652 extern void bfd_elf64_swap_dyn_in
 653   PARAMS ((bfd *, const Elf64_External_Dyn *, Elf_Internal_Dyn *));
 654 extern void bfd_elf64_swap_dyn_out
 655   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *));
 656 extern boolean bfd_elf64_add_dynamic_entry
 657   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 658 extern boolean bfd_elf64_link_create_dynamic_sections
 659   PARAMS ((bfd *, struct bfd_link_info *));
 660 extern boolean bfd_elf64_link_record_dynamic_symbol
 661   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
 662
 663 /* If the target doesn't have reloc handling written yet:  */
 664 extern void bfd_elf64_no_info_to_howto PARAMS ((bfd *, arelent *,
 665                                                 Elf64_Internal_Rela *));
 666
 667 #endif /* _LIBELF_H_ */