bfd/elf-bfd.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef _LIBELF_H_
  22 #define _LIBELF_H_ 1
  23
  24 #include "elf/common.h"
  25 #include "elf/internal.h"
  26 #include "elf/external.h"
  27 #include "bfdlink.h"
  28
  29 /* If size isn't specified as 64 or 32, NAME macro should fail.  */
  30 #ifndef NAME
  31 #if ARCH_SIZE==64
  32 #define NAME(x,y) CAT4(x,64,_,y)
  33 #endif
  34 #if ARCH_SIZE==32
  35 #define NAME(x,y) CAT4(x,32,_,y)
  36 #endif
  37 #endif
  38
  39 #ifndef NAME
  40 #define NAME(x,y) CAT4(x,NOSIZE,_,y)
  41 #endif
  42
  43 #define ElfNAME(X)      NAME(Elf,X)
  44 #define elfNAME(X)      NAME(elf,X)
  45
  46 /* Information held for an ELF symbol.  The first field is the
  47    corresponding asymbol.  Every symbol is an ELF file is actually a
  48    pointer to this structure, although it is often handled as a
  49    pointer to an asymbol.  */
  50
  51 typedef struct
  52 {
  53   /* The BFD symbol.  */
  54   asymbol symbol;
  55   /* ELF symbol information.  */
  56   Elf_Internal_Sym internal_elf_sym;
  57   /* Backend specific information.  */
  58   union
  59     {
  60       unsigned int hppa_arg_reloc;
  61       PTR mips_extr;
  62       PTR any;
  63     }
  64   tc_data;
  65 } elf_symbol_type;
  66 \f
  67 /* ELF linker hash table entries.  */
  68
  69 struct elf_link_hash_entry
  70 {
  71   struct bfd_link_hash_entry root;
  72
  73   /* Symbol index in output file.  This is initialized to -1.  It is
  74      set to -2 if the symbol is used by a reloc.  */
  75   long indx;
  76
  77   /* Symbol size.  */
  78   bfd_size_type size;
  79
  80   /* Symbol index as a dynamic symbol.  Initialized to -1, and remains
  81      -1 if this is not a dynamic symbol.  */
  82   long dynindx;
  83
  84   /* String table index in .dynstr if this is a dynamic symbol.  */
  85   unsigned long dynstr_index;
  86
  87   /* If this is a weak defined symbol from a dynamic object, this
  88      field points to a defined symbol with the same value, if there is
  89      one.  Otherwise it is NULL.  */
  90   struct elf_link_hash_entry *weakdef;
  91
  92   /* If this symbol requires an entry in the global offset table, the
  93      processor specific backend uses this field to hold the offset
  94      into the .got section.  If this field is -1, then the symbol does
  95      not require a global offset table entry.  */
  96   bfd_vma got_offset;
  97
  98   /* If this symbol requires an entry in the procedure linkage table,
  99      the processor specific backend uses these two fields to hold the
 100      offset into the procedure linkage section and the offset into the
 101      .got section.  If plt_offset is -1, then the symbol does not
 102      require an entry in the procedure linkage table.  */
 103   bfd_vma plt_offset;
 104
 105   /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.).  */
 106   char type;
 107
 108   /* Some flags; legal values follow.  */
 109   unsigned char elf_link_hash_flags;
 110   /* Symbol is referenced by a non-shared object.  */
 111 #define ELF_LINK_HASH_REF_REGULAR 01
 112   /* Symbol is defined by a non-shared object.  */
 113 #define ELF_LINK_HASH_DEF_REGULAR 02
 114   /* Symbol is referenced by a shared object.  */
 115 #define ELF_LINK_HASH_REF_DYNAMIC 04
 116   /* Symbol is defined by a shared object.  */
 117 #define ELF_LINK_HASH_DEF_DYNAMIC 010
 118   /* Dynamic symbol has been adjustd.  */
 119 #define ELF_LINK_HASH_DYNAMIC_ADJUSTED 020
 120   /* Symbol needs a copy reloc.  */
 121 #define ELF_LINK_HASH_NEEDS_COPY 040
 122   /* Symbol needs a procedure linkage table entry.  */
 123 #define ELF_LINK_HASH_NEEDS_PLT 0100
 124 };
 125
 126 /* ELF linker hash table.  */
 127
 128 struct elf_link_hash_table
 129 {
 130   struct bfd_link_hash_table root;
 131   /* Whether we have created the special dynamic sections required
 132      when linking against or generating a shared object.  */
 133   boolean dynamic_sections_created;
 134   /* The BFD used to hold special sections created by the linker.
 135      This will be the first BFD found which requires these sections to
 136      be created.  */
 137   bfd *dynobj;
 138   /* The number of symbols found in the link which must be put into
 139      the .dynsym section.  */
 140   bfd_size_type 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   bfd_size_type bucketcount;
 147   /* A linked list of DT_NEEDED names found in dynamic objects
 148      included in the link.  */
 149   struct bfd_link_needed_list *needed;
 150 };
 151
 152 /* Look up an entry in an ELF linker hash table.  */
 153
 154 #define elf_link_hash_lookup(table, string, create, copy, follow)       \
 155   ((struct elf_link_hash_entry *)                                       \
 156    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 157                          (copy), (follow)))
 158
 159 /* Traverse an ELF linker hash table.  */
 160
 161 #define elf_link_hash_traverse(table, func, info)                       \
 162   (bfd_link_hash_traverse                                               \
 163    (&(table)->root,                                                     \
 164     (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \
 165     (info)))
 166
 167 /* Get the ELF linker hash table from a link_info structure.  */
 168
 169 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
 170 \f
 171 /* Constant information held for an ELF backend.  */
 172
 173 struct elf_size_info {
 174   unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
 175   unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
 176
 177   unsigned char arch_size, file_align;
 178   unsigned char elfclass, ev_current;
 179   int (*write_out_phdrs) PARAMS ((bfd *, Elf_Internal_Phdr *, int));
 180   boolean (*write_shdrs_and_ehdr) PARAMS ((bfd *));
 181   void (*write_relocs) PARAMS ((bfd *, asection *, PTR));
 182   void (*swap_symbol_out) PARAMS ((bfd *, Elf_Internal_Sym *, PTR));
 183   boolean (*slurp_reloc_table) PARAMS ((bfd *, asection *, asymbol **));
 184   long (*slurp_symbol_table) PARAMS ((bfd *, asymbol **, boolean));
 185 };
 186
 187 #define elf_symbol_from(ABFD,S) \
 188         (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
 189           && (S)->the_bfd->tdata.elf_obj_data != 0) \
 190          ? (elf_symbol_type *) (S) \
 191          : 0)
 192
 193 struct elf_backend_data
 194 {
 195   /* Whether the backend uses REL or RELA relocations.  FIXME: some
 196      ELF backends use both.  When we need to support one, this whole
 197      approach will need to be changed.  */
 198   int use_rela_p;
 199
 200   /* The architecture for this backend.  */
 201   enum bfd_architecture arch;
 202
 203   /* The ELF machine code (EM_xxxx) for this backend.  */
 204   int elf_machine_code;
 205
 206   /* The maximum page size for this backend.  */
 207   bfd_vma maxpagesize;
 208
 209   /* This is true if the linker should act like collect and gather
 210      global constructors and destructors by name.  This is true for
 211      MIPS ELF because the Irix 5 tools can not handle the .init
 212      section.  */
 213   boolean collect;
 214
 215   /* This is true if the linker should ignore changes to the type of a
 216      symbol.  This is true for MIPS ELF because some Irix 5 objects
 217      record undefined functions as STT_OBJECT although the definitions
 218      are STT_FUNC.  */
 219   boolean type_change_ok;
 220
 221   /* A function to translate an ELF RELA relocation to a BFD arelent
 222      structure.  */
 223   void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
 224                                      Elf_Internal_Rela *));
 225
 226   /* A function to translate an ELF REL relocation to a BFD arelent
 227      structure.  */
 228   void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
 229                                          Elf_Internal_Rel *));
 230
 231   /* A function to determine whether a symbol is global when
 232      partitioning the symbol table into local and global symbols.
 233      This should be NULL for most targets, in which case the correct
 234      thing will be done.  MIPS ELF, at least on the Irix 5, has
 235      special requirements.  */
 236   boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *));
 237
 238   /* The remaining functions are hooks which are called only if they
 239      are not NULL.  */
 240
 241   /* A function to permit a backend specific check on whether a
 242      particular BFD format is relevant for an object file, and to
 243      permit the backend to set any global information it wishes.  When
 244      this is called elf_elfheader is set, but anything else should be
 245      used with caution.  If this returns false, the check_format
 246      routine will return a bfd_error_wrong_format error.  */
 247   boolean (*elf_backend_object_p) PARAMS ((bfd *));
 248
 249   /* A function to do additional symbol processing when reading the
 250      ELF symbol table.  This is where any processor-specific special
 251      section indices are handled.  */
 252   void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *));
 253
 254   /* A function to do additional symbol processing after reading the
 255      entire ELF symbol table.  */
 256   boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *,
 257                                                           elf_symbol_type *,
 258                                                           unsigned int));
 259
 260   /* A function to do additional processing on the ELF section header
 261      just before writing it out.  This is used to set the flags and
 262      type fields for some sections, or to actually write out data for
 263      unusual sections.  */
 264   boolean (*elf_backend_section_processing) PARAMS ((bfd *,
 265                                                      Elf32_Internal_Shdr *));
 266
 267   /* A function to handle unusual section types when creating BFD
 268      sections from ELF sections.  */
 269   boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *,
 270                                                     Elf32_Internal_Shdr *,
 271                                                     char *));
 272
 273   /* A function to set up the ELF section header for a BFD section in
 274      preparation for writing it out.  This is where the flags and type
 275      fields are set for unusual sections.  */
 276   boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *,
 277                                                 asection *));
 278
 279   /* A function to get the ELF section index for a BFD section.  If
 280      this returns true, the section was found.  If it is a normal ELF
 281      section, *RETVAL should be left unchanged.  If it is not a normal
 282      ELF section *RETVAL should be set to the SHN_xxxx index.  */
 283   boolean (*elf_backend_section_from_bfd_section)
 284     PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
 285
 286   /* If this field is not NULL, it is called by the add_symbols phase
 287      of a link just before adding a symbol to the global linker hash
 288      table.  It may modify any of the fields as it wishes.  If *NAME
 289      is set to NULL, the symbol will be skipped rather than being
 290      added to the hash table.  This function is responsible for
 291      handling all processor dependent symbol bindings and section
 292      indices, and must set at least *FLAGS and *SEC for each processor
 293      dependent case; failure to do so will cause a link error.  */
 294   boolean (*elf_add_symbol_hook)
 295     PARAMS ((bfd *abfd, struct bfd_link_info *info,
 296              const Elf_Internal_Sym *, const char **name,
 297              flagword *flags, asection **sec, bfd_vma *value));
 298
 299   /* If this field is not NULL, it is called by the elf_link_output_sym
 300      phase of a link for each symbol which will appear in the object file.  */
 301   boolean (*elf_backend_link_output_symbol_hook)
 302     PARAMS ((bfd *, struct bfd_link_info *info, const char *,
 303              Elf_Internal_Sym *, asection *));
 304
 305   /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
 306      linker the first time it encounters a dynamic object in the link.
 307      This function must create any sections required for dynamic
 308      linking.  The ABFD argument is a dynamic object.  The .interp,
 309      .dynamic, .dynsym, .dynstr, and .hash functions have already been
 310      created, and this function may modify the section flags if
 311      desired.  This function will normally create the .got and .plt
 312      sections, but different backends have different requirements.  */
 313   boolean (*elf_backend_create_dynamic_sections)
 314     PARAMS ((bfd *abfd, struct bfd_link_info *info));
 315
 316   /* The CHECK_RELOCS function is called by the add_symbols phase of
 317      the ELF backend linker.  It is called once for each section with
 318      relocs of an object file, just after the symbols for the object
 319      file have been added to the global linker hash table.  The
 320      function must look through the relocs and do any special handling
 321      required.  This generally means allocating space in the global
 322      offset table, and perhaps allocating space for a reloc.  The
 323      relocs are always passed as Rela structures; if the section
 324      actually uses Rel structures, the r_addend field will always be
 325      zero.  */
 326   boolean (*check_relocs)
 327     PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
 328              const Elf_Internal_Rela *relocs));
 329
 330   /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
 331      linker for every symbol which is defined by a dynamic object and
 332      referenced by a regular object.  This is called after all the
 333      input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
 334      function has been called.  The hash table entry should be
 335      bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
 336      defined in a section from a dynamic object.  Dynamic object
 337      sections are not included in the final link, and this function is
 338      responsible for changing the value to something which the rest of
 339      the link can deal with.  This will normally involve adding an
 340      entry to the .plt or .got or some such section, and setting the
 341      symbol to point to that.  */
 342   boolean (*elf_backend_adjust_dynamic_symbol)
 343     PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
 344
 345   /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
 346      linker after all the linker input files have been seen but before
 347      the sections sizes have been set.  This is called after
 348      ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
 349      It is only called when linking against a dynamic object.  It must
 350      set the sizes of the dynamic sections, and may fill in their
 351      contents as well.  The generic ELF linker can handle the .dynsym,
 352      .dynstr and .hash sections.  This function must handle the
 353      .interp section and any sections created by the
 354      CREATE_DYNAMIC_SECTIONS entry point.  */
 355   boolean (*elf_backend_size_dynamic_sections)
 356     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 357
 358   /* The RELOCATE_SECTION function is called by the ELF backend linker
 359      to handle the relocations for a section.
 360
 361      The relocs are always passed as Rela structures; if the section
 362      actually uses Rel structures, the r_addend field will always be
 363      zero.
 364
 365      This function is responsible for adjust the section contents as
 366      necessary, and (if using Rela relocs and generating a
 367      relocateable output file) adjusting the reloc addend as
 368      necessary.
 369
 370      This function does not have to worry about setting the reloc
 371      address or the reloc symbol index.
 372
 373      LOCAL_SYMS is a pointer to the swapped in local symbols.
 374
 375      LOCAL_SECTIONS is an array giving the section in the input file
 376      corresponding to the st_shndx field of each local symbol.
 377
 378      The global hash table entry for the global symbols can be found
 379      via elf_sym_hashes (input_bfd).
 380
 381      When generating relocateable output, this function must handle
 382      STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
 383      going to be the section symbol corresponding to the output
 384      section, which means that the addend must be adjusted
 385      accordingly.  */
 386   boolean (*elf_backend_relocate_section)
 387     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 388              bfd *input_bfd, asection *input_section, bfd_byte *contents,
 389              Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
 390              asection **local_sections));
 391
 392   /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
 393      linker just before it writes a symbol out to the .dynsym section.
 394      The processor backend may make any required adjustment to the
 395      symbol.  It may also take the opportunity to set contents of the
 396      dynamic sections.  Note that FINISH_DYNAMIC_SYMBOL is called on
 397      all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
 398      on those symbols which are defined by a dynamic object.  */
 399   boolean (*elf_backend_finish_dynamic_symbol)
 400     PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
 401              struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
 402
 403   /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
 404      linker just before it writes all the dynamic sections out to the
 405      output file.  The FINISH_DYNAMIC_SYMBOL will have been called on
 406      all dynamic symbols.  */
 407   boolean (*elf_backend_finish_dynamic_sections)
 408     PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
 409
 410   /* A function to do any beginning processing needed for the ELF file
 411      before building the ELF headers and computing file positions.  */
 412   void (*elf_backend_begin_write_processing)
 413     PARAMS ((bfd *, struct bfd_link_info *));
 414
 415   /* A function to do any final processing needed for the ELF file
 416      before writing it out.  The LINKER argument is true if this BFD
 417      was created by the ELF backend linker.  */
 418   void (*elf_backend_final_write_processing)
 419     PARAMS ((bfd *, boolean linker));
 420
 421   /* This function is called by get_program_header_size.  It should
 422      return the number of additional program segments which this BFD
 423      will need.  It should return -1 on error.  */
 424   int (*elf_backend_additional_program_headers) PARAMS ((bfd *));
 425
 426   /* This function is called to modify an existing segment map in a
 427      backend specific fashion.  */
 428   boolean (*elf_backend_modify_segment_map) PARAMS ((bfd *));
 429
 430   /* The swapping table to use when dealing with ECOFF information.
 431      Used for the MIPS ELF .mdebug section.  */
 432   const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
 433
 434   /* Alternate EM_xxxx machine codes for this backend.  */
 435   int elf_machine_alt1;
 436   int elf_machine_alt2;
 437
 438   const struct elf_size_info *s;
 439
 440   unsigned want_got_plt : 1;
 441   unsigned plt_readonly : 1;
 442   unsigned want_plt_sym : 1;
 443
 444   /* Put ELF and program headers in the first loadable segment.  */
 445   unsigned want_hdr_in_seg : 1;
 446 };
 447
 448 /* Information stored for each BFD section in an ELF file.  This
 449    structure is allocated by elf_new_section_hook.  */
 450
 451 struct bfd_elf_section_data
 452 {
 453   /* The ELF header for this section.  */
 454   Elf_Internal_Shdr this_hdr;
 455   /* The ELF header for the reloc section associated with this
 456      section, if any.  */
 457   Elf_Internal_Shdr rel_hdr;
 458   /* The ELF section number of this section.  Only used for an output
 459      file.  */
 460   int this_idx;
 461   /* The ELF section number of the reloc section associated with this
 462      section, if any.  Only used for an output file.  */
 463   int rel_idx;
 464   /* Used by the backend linker to store the symbol hash table entries
 465      associated with relocs against global symbols.  */
 466   struct elf_link_hash_entry **rel_hashes;
 467   /* A pointer to the swapped relocs.  If the section uses REL relocs,
 468      rather than RELA, all the r_addend fields will be zero.  This
 469      pointer may be NULL.  It is used by the backend linker.  */
 470   Elf_Internal_Rela *relocs;
 471   /* Used by the backend linker when generating a shared library to
 472      record the dynamic symbol index for a section symbol
 473      corresponding to this section.  */
 474   long dynindx;
 475   /* A pointer available for the processor specific ELF backend.  */
 476   PTR tdata;
 477 };
 478
 479 #define elf_section_data(sec)  ((struct bfd_elf_section_data*)sec->used_by_bfd)
 480
 481 #define get_elf_backend_data(abfd) \
 482   ((struct elf_backend_data *) (abfd)->xvec->backend_data)
 483
 484 /* Some private data is stashed away for future use using the tdata pointer
 485    in the bfd structure.  */
 486
 487 struct elf_obj_tdata
 488 {
 489   Elf_Internal_Ehdr elf_header[1];      /* Actual data, but ref like ptr */
 490   Elf_Internal_Shdr **elf_sect_ptr;
 491   Elf_Internal_Phdr *phdr;
 492   struct elf_segment_map *segment_map;
 493   struct bfd_strtab_hash *strtab_ptr;
 494   int num_locals;
 495   int num_globals;
 496   asymbol **section_syms;       /* STT_SECTION symbols for each section */
 497   Elf_Internal_Shdr symtab_hdr;
 498   Elf_Internal_Shdr shstrtab_hdr;
 499   Elf_Internal_Shdr strtab_hdr;
 500   Elf_Internal_Shdr dynsymtab_hdr;
 501   Elf_Internal_Shdr dynstrtab_hdr;
 502   unsigned int symtab_section, shstrtab_section;
 503   unsigned int strtab_section, dynsymtab_section;
 504   file_ptr next_file_pos;
 505   void *prstatus;               /* The raw /proc prstatus structure */
 506   void *prpsinfo;               /* The raw /proc prpsinfo structure */
 507   bfd_vma gp;                   /* The gp value (MIPS only, for now) */
 508   unsigned int gp_size;         /* The gp size (MIPS only, for now) */
 509
 510   /* This is set to true if the object was created by the backend
 511      linker.  */
 512   boolean linker;
 513
 514   /* A mapping from external symbols to entries in the linker hash
 515      table, used when linking.  This is indexed by the symbol index
 516      minus the sh_info field of the symbol table header.  */
 517   struct elf_link_hash_entry **sym_hashes;
 518
 519   /* A mapping from local symbols to offsets into the global offset
 520      table, used when linking.  This is indexed by the symbol index.  */
 521   bfd_vma *local_got_offsets;
 522
 523   /* The linker ELF emulation code needs to let the backend ELF linker
 524      know what filename should be used for a dynamic object if the
 525      dynamic object is found using a search.  This field is used to
 526      hold that information.  */
 527   const char *dt_needed_name;
 528
 529   /* Irix 5 often screws up the symbol table, sorting local symbols
 530      after global symbols.  This flag is set if the symbol table in
 531      this BFD appears to be screwed up.  If it is, we ignore the
 532      sh_info field in the symbol table header, and always read all the
 533      symbols.  */
 534   boolean bad_symtab;
 535
 536   /* Records the result of `get_program_header_size'.  */
 537   bfd_size_type program_header_size;
 538
 539   /* Used by MIPS ELF find_nearest_line entry point.  The structure
 540      could be included directly in this one, but there's no point to
 541      wasting the memory just for the infrequently called
 542      find_nearest_line.  */
 543   struct mips_elf_find_line *find_line_info;
 544
 545   /* Used to determine if the e_flags field has been initialized */
 546   boolean flags_init;
 547 };
 548
 549 #define elf_tdata(bfd)          ((bfd) -> tdata.elf_obj_data)
 550 #define elf_elfheader(bfd)      (elf_tdata(bfd) -> elf_header)
 551 #define elf_elfsections(bfd)    (elf_tdata(bfd) -> elf_sect_ptr)
 552 #define elf_shstrtab(bfd)       (elf_tdata(bfd) -> strtab_ptr)
 553 #define elf_onesymtab(bfd)      (elf_tdata(bfd) -> symtab_section)
 554 #define elf_dynsymtab(bfd)      (elf_tdata(bfd) -> dynsymtab_section)
 555 #define elf_num_locals(bfd)     (elf_tdata(bfd) -> num_locals)
 556 #define elf_num_globals(bfd)    (elf_tdata(bfd) -> num_globals)
 557 #define elf_section_syms(bfd)   (elf_tdata(bfd) -> section_syms)
 558 #define core_prpsinfo(bfd)      (elf_tdata(bfd) -> prpsinfo)
 559 #define core_prstatus(bfd)      (elf_tdata(bfd) -> prstatus)
 560 #define elf_gp(bfd)             (elf_tdata(bfd) -> gp)
 561 #define elf_gp_size(bfd)        (elf_tdata(bfd) -> gp_size)
 562 #define elf_sym_hashes(bfd)     (elf_tdata(bfd) -> sym_hashes)
 563 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets)
 564 #define elf_dt_needed_name(bfd) (elf_tdata(bfd) -> dt_needed_name)
 565 #define elf_bad_symtab(bfd)     (elf_tdata(bfd) -> bad_symtab)
 566 #define elf_flags_init(bfd)     (elf_tdata(bfd) -> flags_init)
 567 \f
 568 extern char * bfd_elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
 569 extern char * bfd_elf_get_str_section PARAMS ((bfd *, unsigned));
 570
 571 extern boolean _bfd_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
 572 extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *,
 573                                           bfd_print_symbol_type));
 574 #define elf_string_from_elf_strtab(abfd,strindex) \
 575      bfd_elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
 576
 577 #define bfd_elf32_print_symbol  bfd_elf_print_symbol
 578 #define bfd_elf64_print_symbol  bfd_elf_print_symbol
 579 #define bfd_elf32_mkobject      bfd_elf_mkobject
 580 #define bfd_elf64_mkobject      bfd_elf_mkobject
 581 #define elf_mkobject            bfd_elf_mkobject
 582
 583 extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *));
 584
 585 extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *,
 586                                                             arelent *,
 587                                                             asymbol *,
 588                                                             PTR,
 589                                                             asection *,
 590                                                             bfd *,
 591                                                             char **));
 592 extern boolean bfd_elf_mkobject PARAMS ((bfd *));
 593 extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
 594 extern boolean _bfd_elf_make_section_from_shdr
 595   PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
 596 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
 597   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 598 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
 599   PARAMS ((bfd *));
 600 extern boolean _bfd_elf_link_hash_table_init
 601   PARAMS ((struct elf_link_hash_table *, bfd *,
 602            struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 603                                        struct bfd_hash_table *,
 604                                        const char *)));
 605
 606 extern boolean _bfd_elf_copy_private_symbol_data
 607   PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
 608 extern boolean _bfd_elf_copy_private_section_data
 609   PARAMS ((bfd *, asection *, bfd *, asection *));
 610 extern boolean _bfd_elf_write_object_contents PARAMS ((bfd *));
 611 extern boolean _bfd_elf_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
 612                                                        file_ptr,
 613                                                        bfd_size_type));
 614 extern long _bfd_elf_get_symtab_upper_bound PARAMS ((bfd *));
 615 extern long _bfd_elf_get_symtab PARAMS ((bfd *, asymbol **));
 616 extern long _bfd_elf_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
 617 extern long _bfd_elf_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
 618 extern long _bfd_elf_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 619 extern long _bfd_elf_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 620                                                   arelent **, asymbol **));
 621 extern asymbol *_bfd_elf_make_empty_symbol PARAMS ((bfd *));
 622 extern void _bfd_elf_get_symbol_info PARAMS ((bfd *, asymbol *,
 623                                                symbol_info *));
 624 extern alent *_bfd_elf_get_lineno PARAMS ((bfd *, asymbol *));
 625 extern boolean _bfd_elf_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 626                                                 unsigned long));
 627 extern boolean _bfd_elf_find_nearest_line PARAMS ((bfd *, asection *,
 628                                                     asymbol **,
 629                                                     bfd_vma, CONST char **,
 630                                                     CONST char **,
 631                                                     unsigned int *));
 632 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
 633 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
 634 extern int _bfd_elf_sizeof_headers PARAMS ((bfd *, boolean));
 635 extern boolean _bfd_elf_new_section_hook PARAMS ((bfd *, asection *));
 636
 637 /* If the target doesn't have reloc handling written yet:  */
 638 extern void _bfd_elf_no_info_to_howto PARAMS ((bfd *, arelent *,
 639                                                Elf_Internal_Rela *));
 640
 641 asection *bfd_section_from_elf_index PARAMS ((bfd *, unsigned int));
 642 boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
 643                                                   struct bfd_link_info *));
 644 struct bfd_strtab_hash *_bfd_elf_stringtab_init PARAMS ((void));
 645 boolean
 646 _bfd_elf_link_record_dynamic_symbol PARAMS ((struct bfd_link_info *,
 647                                              struct elf_link_hash_entry *));
 648 boolean
 649 _bfd_elf_compute_section_file_positions PARAMS ((bfd *,
 650                                                  struct bfd_link_info *));
 651 void _bfd_elf_assign_file_positions_for_relocs PARAMS ((bfd *));
 652 file_ptr _bfd_elf_assign_file_position_for_section PARAMS ((Elf_Internal_Shdr *,
 653                                                             file_ptr,
 654                                                             boolean));
 655
 656 boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
 657                                                   struct bfd_link_info *));
 658 boolean _bfd_elf_create_got_section PARAMS ((bfd *,
 659                                              struct bfd_link_info *));
 660
 661 extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
 662 extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
 663 extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
 664 extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
 665 extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
 666                                                                  bfd *));
 667
 668 extern boolean bfd_elf32_bfd_link_add_symbols
 669   PARAMS ((bfd *, struct bfd_link_info *));
 670 extern boolean bfd_elf32_bfd_final_link
 671   PARAMS ((bfd *, struct bfd_link_info *));
 672
 673 extern void bfd_elf32_swap_symbol_in
 674   PARAMS ((bfd *, Elf32_External_Sym *, Elf_Internal_Sym *));
 675 extern void bfd_elf32_swap_symbol_out
 676   PARAMS ((bfd *, Elf_Internal_Sym *, PTR));
 677 extern void bfd_elf32_swap_reloc_in
 678   PARAMS ((bfd *, Elf32_External_Rel *, Elf_Internal_Rel *));
 679 extern void bfd_elf32_swap_reloc_out
 680   PARAMS ((bfd *, Elf_Internal_Rel *, Elf32_External_Rel *));
 681 extern void bfd_elf32_swap_reloca_in
 682   PARAMS ((bfd *, Elf32_External_Rela *, Elf_Internal_Rela *));
 683 extern void bfd_elf32_swap_reloca_out
 684   PARAMS ((bfd *, Elf_Internal_Rela *, Elf32_External_Rela *));
 685 extern void bfd_elf32_swap_phdr_in
 686   PARAMS ((bfd *, Elf32_External_Phdr *, Elf_Internal_Phdr *));
 687 extern void bfd_elf32_swap_phdr_out
 688   PARAMS ((bfd *, Elf_Internal_Phdr *, Elf32_External_Phdr *));
 689 extern void bfd_elf32_swap_dyn_in
 690   PARAMS ((bfd *, const Elf32_External_Dyn *, Elf_Internal_Dyn *));
 691 extern void bfd_elf32_swap_dyn_out
 692   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *));
 693 extern boolean bfd_elf32_add_dynamic_entry
 694   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 695 extern boolean bfd_elf32_link_create_dynamic_sections
 696   PARAMS ((bfd *, struct bfd_link_info *));
 697
 698 extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
 699 extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
 700 extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
 701 extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
 702 extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
 703                                                                  bfd *));
 704 extern boolean bfd_elf64_bfd_link_add_symbols
 705   PARAMS ((bfd *, struct bfd_link_info *));
 706 extern boolean bfd_elf64_bfd_final_link
 707   PARAMS ((bfd *, struct bfd_link_info *));
 708
 709 extern void bfd_elf64_swap_symbol_in
 710   PARAMS ((bfd *, Elf64_External_Sym *, Elf_Internal_Sym *));
 711 extern void bfd_elf64_swap_symbol_out
 712   PARAMS ((bfd *, Elf_Internal_Sym *, PTR));
 713 extern void bfd_elf64_swap_reloc_in
 714   PARAMS ((bfd *, Elf64_External_Rel *, Elf_Internal_Rel *));
 715 extern void bfd_elf64_swap_reloc_out
 716   PARAMS ((bfd *, Elf_Internal_Rel *, Elf64_External_Rel *));
 717 extern void bfd_elf64_swap_reloca_in
 718   PARAMS ((bfd *, Elf64_External_Rela *, Elf_Internal_Rela *));
 719 extern void bfd_elf64_swap_reloca_out
 720   PARAMS ((bfd *, Elf_Internal_Rela *, Elf64_External_Rela *));
 721 extern void bfd_elf64_swap_phdr_in
 722   PARAMS ((bfd *, Elf64_External_Phdr *, Elf_Internal_Phdr *));
 723 extern void bfd_elf64_swap_phdr_out
 724   PARAMS ((bfd *, Elf_Internal_Phdr *, Elf64_External_Phdr *));
 725 extern void bfd_elf64_swap_dyn_in
 726   PARAMS ((bfd *, const Elf64_External_Dyn *, Elf_Internal_Dyn *));
 727 extern void bfd_elf64_swap_dyn_out
 728   PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *));
 729 extern boolean bfd_elf64_add_dynamic_entry
 730   PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
 731 extern boolean bfd_elf64_link_create_dynamic_sections
 732   PARAMS ((bfd *, struct bfd_link_info *));
 733
 734 #define bfd_elf32_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
 735 #define bfd_elf64_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
 736
 737 #endif /* _LIBELF_H_ */