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