bfd/targets.c

   1 /* Generic target-file-type support for the BFD library.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   4    Free Software Foundation, Inc.
   5    Written by Cygnus Support.
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #include "sysdep.h"
  25 #include "bfd.h"
  26 #include "libbfd.h"
  27 #include "fnmatch.h"
  28
  29 /*
  30    It's okay to see some:
  31 #if 0
  32    directives in this source file, as targets.c uses them to exclude
  33    certain BFD vectors.  This comment is specially formatted to catch
  34    users who grep for ^#if 0, so please keep it this way!
  35 */
  36
  37 /*
  38 SECTION
  39         Targets
  40
  41 DESCRIPTION
  42         Each port of BFD to a different machine requires the creation
  43         of a target back end. All the back end provides to the root
  44         part of BFD is a structure containing pointers to functions
  45         which perform certain low level operations on files. BFD
  46         translates the applications's requests through a pointer into
  47         calls to the back end routines.
  48
  49         When a file is opened with <<bfd_openr>>, its format and
  50         target are unknown. BFD uses various mechanisms to determine
  51         how to interpret the file. The operations performed are:
  52
  53         o Create a BFD by calling the internal routine
  54         <<_bfd_new_bfd>>, then call <<bfd_find_target>> with the
  55         target string supplied to <<bfd_openr>> and the new BFD pointer.
  56
  57         o If a null target string was provided to <<bfd_find_target>>,
  58         look up the environment variable <<GNUTARGET>> and use
  59         that as the target string.
  60
  61         o If the target string is still <<NULL>>, or the target string is
  62         <<default>>, then use the first item in the target vector
  63         as the target type, and set <<target_defaulted>> in the BFD to
  64         cause <<bfd_check_format>> to loop through all the targets.
  65         @xref{bfd_target}.  @xref{Formats}.
  66
  67         o Otherwise, inspect the elements in the target vector
  68         one by one, until a match on target name is found. When found,
  69         use it.
  70
  71         o Otherwise return the error <<bfd_error_invalid_target>> to
  72         <<bfd_openr>>.
  73
  74         o <<bfd_openr>> attempts to open the file using
  75         <<bfd_open_file>>, and returns the BFD.
  76
  77         Once the BFD has been opened and the target selected, the file
  78         format may be determined. This is done by calling
  79         <<bfd_check_format>> on the BFD with a suggested format.
  80         If <<target_defaulted>> has been set, each possible target
  81         type is tried to see if it recognizes the specified format.
  82         <<bfd_check_format>> returns <<TRUE>> when the caller guesses right.
  83 @menu
  84 @* bfd_target::
  85 @end menu
  86 */
  87
  88 /*
  89
  90 INODE
  91         bfd_target,  , Targets, Targets
  92 DOCDD
  93 SUBSECTION
  94         bfd_target
  95
  96 DESCRIPTION
  97         This structure contains everything that BFD knows about a
  98         target. It includes things like its byte order, name, and which
  99         routines to call to do various operations.
 100
 101         Every BFD points to a target structure with its <<xvec>>
 102         member.
 103
 104         The macros below are used to dispatch to functions through the
 105         <<bfd_target>> vector. They are used in a number of macros further
 106         down in @file{bfd.h}, and are also used when calling various
 107         routines by hand inside the BFD implementation.  The @var{arglist}
 108         argument must be parenthesized; it contains all the arguments
 109         to the called function.
 110
 111         They make the documentation (more) unpleasant to read, so if
 112         someone wants to fix this and not break the above, please do.
 113
 114 .#define BFD_SEND(bfd, message, arglist) \
 115 .  ((*((bfd)->xvec->message)) arglist)
 116 .
 117 .#ifdef DEBUG_BFD_SEND
 118 .#undef BFD_SEND
 119 .#define BFD_SEND(bfd, message, arglist) \
 120 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 121 .    ((*((bfd)->xvec->message)) arglist) : \
 122 .    (bfd_assert (__FILE__,__LINE__), NULL))
 123 .#endif
 124
 125         For operations which index on the BFD format:
 126
 127 .#define BFD_SEND_FMT(bfd, message, arglist) \
 128 .  (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist)
 129 .
 130 .#ifdef DEBUG_BFD_SEND
 131 .#undef BFD_SEND_FMT
 132 .#define BFD_SEND_FMT(bfd, message, arglist) \
 133 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 134 .   (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist) : \
 135 .   (bfd_assert (__FILE__,__LINE__), NULL))
 136 .#endif
 137 .
 138         This is the structure which defines the type of BFD this is.  The
 139         <<xvec>> member of the struct <<bfd>> itself points here.  Each
 140         module that implements access to a different target under BFD,
 141         defines one of these.
 142
 143         FIXME, these names should be rationalised with the names of
 144         the entry points which call them. Too bad we can't have one
 145         macro to define them both!
 146
 147 .enum bfd_flavour
 148 .{
 149 .  bfd_target_unknown_flavour,
 150 .  bfd_target_aout_flavour,
 151 .  bfd_target_coff_flavour,
 152 .  bfd_target_ecoff_flavour,
 153 .  bfd_target_xcoff_flavour,
 154 .  bfd_target_elf_flavour,
 155 .  bfd_target_ieee_flavour,
 156 .  bfd_target_nlm_flavour,
 157 .  bfd_target_oasys_flavour,
 158 .  bfd_target_tekhex_flavour,
 159 .  bfd_target_srec_flavour,
 160 .  bfd_target_ihex_flavour,
 161 .  bfd_target_som_flavour,
 162 .  bfd_target_os9k_flavour,
 163 .  bfd_target_versados_flavour,
 164 .  bfd_target_msdos_flavour,
 165 .  bfd_target_ovax_flavour,
 166 .  bfd_target_evax_flavour,
 167 .  bfd_target_mmo_flavour,
 168 .  bfd_target_mach_o_flavour,
 169 .  bfd_target_pef_flavour,
 170 .  bfd_target_pef_xlib_flavour,
 171 .  bfd_target_sym_flavour
 172 .};
 173 .
 174 .enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
 175 .
 176 .{* Forward declaration.  *}
 177 .typedef struct bfd_link_info _bfd_link_info;
 178 .
 179 .typedef struct bfd_target
 180 .{
 181 .  {* Identifies the kind of target, e.g., SunOS4, Ultrix, etc.  *}
 182 .  char *name;
 183 .
 184 . {* The "flavour" of a back end is a general indication about
 185 .    the contents of a file.  *}
 186 .  enum bfd_flavour flavour;
 187 .
 188 .  {* The order of bytes within the data area of a file.  *}
 189 .  enum bfd_endian byteorder;
 190 .
 191 . {* The order of bytes within the header parts of a file.  *}
 192 .  enum bfd_endian header_byteorder;
 193 .
 194 .  {* A mask of all the flags which an executable may have set -
 195 .     from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.  *}
 196 .  flagword object_flags;
 197 .
 198 . {* A mask of all the flags which a section may have set - from
 199 .    the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.  *}
 200 .  flagword section_flags;
 201 .
 202 . {* The character normally found at the front of a symbol.
 203 .    (if any), perhaps `_'.  *}
 204 .  char symbol_leading_char;
 205 .
 206 . {* The pad character for file names within an archive header.  *}
 207 .  char ar_pad_char;
 208 .
 209 .  {* The maximum number of characters in an archive header.  *}
 210 .  unsigned short ar_max_namelen;
 211 .
 212 .  {* Entries for byte swapping for data. These are different from the
 213 .     other entry points, since they don't take a BFD as the first argument.
 214 .     Certain other handlers could do the same.  *}
 215 .  bfd_uint64_t   (*bfd_getx64) (const void *);
 216 .  bfd_int64_t    (*bfd_getx_signed_64) (const void *);
 217 .  void           (*bfd_putx64) (bfd_uint64_t, void *);
 218 .  bfd_vma        (*bfd_getx32) (const void *);
 219 .  bfd_signed_vma (*bfd_getx_signed_32) (const void *);
 220 .  void           (*bfd_putx32) (bfd_vma, void *);
 221 .  bfd_vma        (*bfd_getx16) (const void *);
 222 .  bfd_signed_vma (*bfd_getx_signed_16) (const void *);
 223 .  void           (*bfd_putx16) (bfd_vma, void *);
 224 .
 225 .  {* Byte swapping for the headers.  *}
 226 .  bfd_uint64_t   (*bfd_h_getx64) (const void *);
 227 .  bfd_int64_t    (*bfd_h_getx_signed_64) (const void *);
 228 .  void           (*bfd_h_putx64) (bfd_uint64_t, void *);
 229 .  bfd_vma        (*bfd_h_getx32) (const void *);
 230 .  bfd_signed_vma (*bfd_h_getx_signed_32) (const void *);
 231 .  void           (*bfd_h_putx32) (bfd_vma, void *);
 232 .  bfd_vma        (*bfd_h_getx16) (const void *);
 233 .  bfd_signed_vma (*bfd_h_getx_signed_16) (const void *);
 234 .  void           (*bfd_h_putx16) (bfd_vma, void *);
 235 .
 236 .  {* Format dependent routines: these are vectors of entry points
 237 .     within the target vector structure, one for each format to check.  *}
 238 .
 239 .  {* Check the format of a file being read.  Return a <<bfd_target *>> or zero.  *}
 240 .  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) (bfd *);
 241 .
 242 .  {* Set the format of a file being written.  *}
 243 .  bfd_boolean (*_bfd_set_format[bfd_type_end]) (bfd *);
 244 .
 245 .  {* Write cached information into a file being written, at <<bfd_close>>.  *}
 246 .  bfd_boolean (*_bfd_write_contents[bfd_type_end]) (bfd *);
 247 .
 248 The general target vector.  These vectors are initialized using the
 249 BFD_JUMP_TABLE macros.
 250 .
 251 .  {* Generic entry points.  *}
 252 .#define BFD_JUMP_TABLE_GENERIC(NAME) \
 253 .  NAME##_close_and_cleanup, \
 254 .  NAME##_bfd_free_cached_info, \
 255 .  NAME##_new_section_hook, \
 256 .  NAME##_get_section_contents, \
 257 .  NAME##_get_section_contents_in_window
 258 .
 259 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 260 .  bfd_boolean (*_close_and_cleanup) (bfd *);
 261 .  {* Ask the BFD to free all cached information.  *}
 262 .  bfd_boolean (*_bfd_free_cached_info) (bfd *);
 263 .  {* Called when a new section is created.  *}
 264 .  bfd_boolean (*_new_section_hook) (bfd *, sec_ptr);
 265 .  {* Read the contents of a section.  *}
 266 .  bfd_boolean (*_bfd_get_section_contents)
 267 .    (bfd *, sec_ptr, void *, file_ptr, bfd_size_type);
 268 .  bfd_boolean (*_bfd_get_section_contents_in_window)
 269 .    (bfd *, sec_ptr, bfd_window *, file_ptr, bfd_size_type);
 270 .
 271 .  {* Entry points to copy private data.  *}
 272 .#define BFD_JUMP_TABLE_COPY(NAME) \
 273 .  NAME##_bfd_copy_private_bfd_data, \
 274 .  NAME##_bfd_merge_private_bfd_data, \
 275 .  _bfd_generic_init_private_section_data, \
 276 .  NAME##_bfd_copy_private_section_data, \
 277 .  NAME##_bfd_copy_private_symbol_data, \
 278 .  NAME##_bfd_copy_private_header_data, \
 279 .  NAME##_bfd_set_private_flags, \
 280 .  NAME##_bfd_print_private_bfd_data
 281 .
 282 .  {* Called to copy BFD general private data from one object file
 283 .     to another.  *}
 284 .  bfd_boolean (*_bfd_copy_private_bfd_data) (bfd *, bfd *);
 285 .  {* Called to merge BFD general private data from one object file
 286 .     to a common output file when linking.  *}
 287 .  bfd_boolean (*_bfd_merge_private_bfd_data) (bfd *, bfd *);
 288 .  {* Called to initialize BFD private section data from one object file
 289 .     to another.  *}
 290 .#define bfd_init_private_section_data(ibfd, isec, obfd, osec, link_info) \
 291 .  BFD_SEND (obfd, _bfd_init_private_section_data, (ibfd, isec, obfd, osec, link_info))
 292 .  bfd_boolean (*_bfd_init_private_section_data)
 293 .    (bfd *, sec_ptr, bfd *, sec_ptr, struct bfd_link_info *);
 294 .  {* Called to copy BFD private section data from one object file
 295 .     to another.  *}
 296 .  bfd_boolean (*_bfd_copy_private_section_data)
 297 .    (bfd *, sec_ptr, bfd *, sec_ptr);
 298 .  {* Called to copy BFD private symbol data from one symbol
 299 .     to another.  *}
 300 .  bfd_boolean (*_bfd_copy_private_symbol_data)
 301 .    (bfd *, asymbol *, bfd *, asymbol *);
 302 .  {* Called to copy BFD private header data from one object file
 303 .     to another.  *}
 304 .  bfd_boolean (*_bfd_copy_private_header_data)
 305 .    (bfd *, bfd *);
 306 .  {* Called to set private backend flags.  *}
 307 .  bfd_boolean (*_bfd_set_private_flags) (bfd *, flagword);
 308 .
 309 .  {* Called to print private BFD data.  *}
 310 .  bfd_boolean (*_bfd_print_private_bfd_data) (bfd *, void *);
 311 .
 312 .  {* Core file entry points.  *}
 313 .#define BFD_JUMP_TABLE_CORE(NAME) \
 314 .  NAME##_core_file_failing_command, \
 315 .  NAME##_core_file_failing_signal, \
 316 .  NAME##_core_file_matches_executable_p
 317 .
 318 .  char *      (*_core_file_failing_command) (bfd *);
 319 .  int         (*_core_file_failing_signal) (bfd *);
 320 .  bfd_boolean (*_core_file_matches_executable_p) (bfd *, bfd *);
 321 .
 322 .  {* Archive entry points.  *}
 323 .#define BFD_JUMP_TABLE_ARCHIVE(NAME) \
 324 .  NAME##_slurp_armap, \
 325 .  NAME##_slurp_extended_name_table, \
 326 .  NAME##_construct_extended_name_table, \
 327 .  NAME##_truncate_arname, \
 328 .  NAME##_write_armap, \
 329 .  NAME##_read_ar_hdr, \
 330 .  NAME##_openr_next_archived_file, \
 331 .  NAME##_get_elt_at_index, \
 332 .  NAME##_generic_stat_arch_elt, \
 333 .  NAME##_update_armap_timestamp
 334 .
 335 .  bfd_boolean (*_bfd_slurp_armap) (bfd *);
 336 .  bfd_boolean (*_bfd_slurp_extended_name_table) (bfd *);
 337 .  bfd_boolean (*_bfd_construct_extended_name_table)
 338 .    (bfd *, char **, bfd_size_type *, const char **);
 339 .  void        (*_bfd_truncate_arname) (bfd *, const char *, char *);
 340 .  bfd_boolean (*write_armap)
 341 .    (bfd *, unsigned int, struct orl *, unsigned int, int);
 342 .  void *      (*_bfd_read_ar_hdr_fn) (bfd *);
 343 .  bfd *       (*openr_next_archived_file) (bfd *, bfd *);
 344 .#define bfd_get_elt_at_index(b,i) BFD_SEND (b, _bfd_get_elt_at_index, (b,i))
 345 .  bfd *       (*_bfd_get_elt_at_index) (bfd *, symindex);
 346 .  int         (*_bfd_stat_arch_elt) (bfd *, struct stat *);
 347 .  bfd_boolean (*_bfd_update_armap_timestamp) (bfd *);
 348 .
 349 .  {* Entry points used for symbols.  *}
 350 .#define BFD_JUMP_TABLE_SYMBOLS(NAME) \
 351 .  NAME##_get_symtab_upper_bound, \
 352 .  NAME##_canonicalize_symtab, \
 353 .  NAME##_make_empty_symbol, \
 354 .  NAME##_print_symbol, \
 355 .  NAME##_get_symbol_info, \
 356 .  NAME##_bfd_is_local_label_name, \
 357 .  NAME##_bfd_is_target_special_symbol, \
 358 .  NAME##_get_lineno, \
 359 .  NAME##_find_nearest_line, \
 360 .  _bfd_generic_find_line, \
 361 .  NAME##_find_inliner_info, \
 362 .  NAME##_bfd_make_debug_symbol, \
 363 .  NAME##_read_minisymbols, \
 364 .  NAME##_minisymbol_to_symbol
 365 .
 366 .  long        (*_bfd_get_symtab_upper_bound) (bfd *);
 367 .  long        (*_bfd_canonicalize_symtab)
 368 .    (bfd *, struct bfd_symbol **);
 369 .  struct bfd_symbol *
 370 .              (*_bfd_make_empty_symbol) (bfd *);
 371 .  void        (*_bfd_print_symbol)
 372 .    (bfd *, void *, struct bfd_symbol *, bfd_print_symbol_type);
 373 .#define bfd_print_symbol(b,p,s,e) BFD_SEND (b, _bfd_print_symbol, (b,p,s,e))
 374 .  void        (*_bfd_get_symbol_info)
 375 .    (bfd *, struct bfd_symbol *, symbol_info *);
 376 .#define bfd_get_symbol_info(b,p,e) BFD_SEND (b, _bfd_get_symbol_info, (b,p,e))
 377 .  bfd_boolean (*_bfd_is_local_label_name) (bfd *, const char *);
 378 .  bfd_boolean (*_bfd_is_target_special_symbol) (bfd *, asymbol *);
 379 .  alent *     (*_get_lineno) (bfd *, struct bfd_symbol *);
 380 .  bfd_boolean (*_bfd_find_nearest_line)
 381 .    (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
 382 .     const char **, const char **, unsigned int *);
 383 .  bfd_boolean (*_bfd_find_line)
 384 .    (bfd *, struct bfd_symbol **, struct bfd_symbol *,
 385 .     const char **, unsigned int *);
 386 .  bfd_boolean (*_bfd_find_inliner_info)
 387 .    (bfd *, const char **, const char **, unsigned int *);
 388 . {* Back-door to allow format-aware applications to create debug symbols
 389 .    while using BFD for everything else.  Currently used by the assembler
 390 .    when creating COFF files.  *}
 391 .  asymbol *   (*_bfd_make_debug_symbol)
 392 .    (bfd *, void *, unsigned long size);
 393 .#define bfd_read_minisymbols(b, d, m, s) \
 394 .  BFD_SEND (b, _read_minisymbols, (b, d, m, s))
 395 .  long        (*_read_minisymbols)
 396 .    (bfd *, bfd_boolean, void **, unsigned int *);
 397 .#define bfd_minisymbol_to_symbol(b, d, m, f) \
 398 .  BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
 399 .  asymbol *   (*_minisymbol_to_symbol)
 400 .    (bfd *, bfd_boolean, const void *, asymbol *);
 401 .
 402 .  {* Routines for relocs.  *}
 403 .#define BFD_JUMP_TABLE_RELOCS(NAME) \
 404 .  NAME##_get_reloc_upper_bound, \
 405 .  NAME##_canonicalize_reloc, \
 406 .  NAME##_bfd_reloc_type_lookup, \
 407 .  NAME##_bfd_reloc_name_lookup
 408 .
 409 .  long        (*_get_reloc_upper_bound) (bfd *, sec_ptr);
 410 .  long        (*_bfd_canonicalize_reloc)
 411 .    (bfd *, sec_ptr, arelent **, struct bfd_symbol **);
 412 .  {* See documentation on reloc types.  *}
 413 .  reloc_howto_type *
 414 .              (*reloc_type_lookup) (bfd *, bfd_reloc_code_real_type);
 415 .  reloc_howto_type *
 416 .              (*reloc_name_lookup) (bfd *, const char *);
 417 .
 418 .
 419 .  {* Routines used when writing an object file.  *}
 420 .#define BFD_JUMP_TABLE_WRITE(NAME) \
 421 .  NAME##_set_arch_mach, \
 422 .  NAME##_set_section_contents
 423 .
 424 .  bfd_boolean (*_bfd_set_arch_mach)
 425 .    (bfd *, enum bfd_architecture, unsigned long);
 426 .  bfd_boolean (*_bfd_set_section_contents)
 427 .    (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
 428 .
 429 .  {* Routines used by the linker.  *}
 430 .#define BFD_JUMP_TABLE_LINK(NAME) \
 431 .  NAME##_sizeof_headers, \
 432 .  NAME##_bfd_get_relocated_section_contents, \
 433 .  NAME##_bfd_relax_section, \
 434 .  NAME##_bfd_link_hash_table_create, \
 435 .  NAME##_bfd_link_hash_table_free, \
 436 .  NAME##_bfd_link_add_symbols, \
 437 .  NAME##_bfd_link_just_syms, \
 438 .  NAME##_bfd_final_link, \
 439 .  NAME##_bfd_link_split_section, \
 440 .  NAME##_bfd_gc_sections, \
 441 .  NAME##_bfd_merge_sections, \
 442 .  NAME##_bfd_is_group_section, \
 443 .  NAME##_bfd_discard_group, \
 444 .  NAME##_section_already_linked \
 445 .
 446 .  int         (*_bfd_sizeof_headers) (bfd *, struct bfd_link_info *);
 447 .  bfd_byte *  (*_bfd_get_relocated_section_contents)
 448 .    (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 449 .     bfd_byte *, bfd_boolean, struct bfd_symbol **);
 450 .
 451 .  bfd_boolean (*_bfd_relax_section)
 452 .    (bfd *, struct bfd_section *, struct bfd_link_info *, bfd_boolean *);
 453 .
 454 .  {* Create a hash table for the linker.  Different backends store
 455 .     different information in this table.  *}
 456 .  struct bfd_link_hash_table *
 457 .              (*_bfd_link_hash_table_create) (bfd *);
 458 .
 459 .  {* Release the memory associated with the linker hash table.  *}
 460 .  void        (*_bfd_link_hash_table_free) (struct bfd_link_hash_table *);
 461 .
 462 .  {* Add symbols from this object file into the hash table.  *}
 463 .  bfd_boolean (*_bfd_link_add_symbols) (bfd *, struct bfd_link_info *);
 464 .
 465 .  {* Indicate that we are only retrieving symbol values from this section.  *}
 466 .  void        (*_bfd_link_just_syms) (asection *, struct bfd_link_info *);
 467 .
 468 .  {* Do a link based on the link_order structures attached to each
 469 .     section of the BFD.  *}
 470 .  bfd_boolean (*_bfd_final_link) (bfd *, struct bfd_link_info *);
 471 .
 472 .  {* Should this section be split up into smaller pieces during linking.  *}
 473 .  bfd_boolean (*_bfd_link_split_section) (bfd *, struct bfd_section *);
 474 .
 475 .  {* Remove sections that are not referenced from the output.  *}
 476 .  bfd_boolean (*_bfd_gc_sections) (bfd *, struct bfd_link_info *);
 477 .
 478 .  {* Attempt to merge SEC_MERGE sections.  *}
 479 .  bfd_boolean (*_bfd_merge_sections) (bfd *, struct bfd_link_info *);
 480 .
 481 .  {* Is this section a member of a group?  *}
 482 .  bfd_boolean (*_bfd_is_group_section) (bfd *, const struct bfd_section *);
 483 .
 484 .  {* Discard members of a group.  *}
 485 .  bfd_boolean (*_bfd_discard_group) (bfd *, struct bfd_section *);
 486 .
 487 .  {* Check if SEC has been already linked during a reloceatable or
 488 .     final link.  *}
 489 .  void (*_section_already_linked) (bfd *, struct bfd_section *,
 490 .                                   struct bfd_link_info *);
 491 .
 492 .  {* Routines to handle dynamic symbols and relocs.  *}
 493 .#define BFD_JUMP_TABLE_DYNAMIC(NAME) \
 494 .  NAME##_get_dynamic_symtab_upper_bound, \
 495 .  NAME##_canonicalize_dynamic_symtab, \
 496 .  NAME##_get_synthetic_symtab, \
 497 .  NAME##_get_dynamic_reloc_upper_bound, \
 498 .  NAME##_canonicalize_dynamic_reloc
 499 .
 500 .  {* Get the amount of memory required to hold the dynamic symbols.  *}
 501 .  long        (*_bfd_get_dynamic_symtab_upper_bound) (bfd *);
 502 .  {* Read in the dynamic symbols.  *}
 503 .  long        (*_bfd_canonicalize_dynamic_symtab)
 504 .    (bfd *, struct bfd_symbol **);
 505 .  {* Create synthetized symbols.  *}
 506 .  long        (*_bfd_get_synthetic_symtab)
 507 .    (bfd *, long, struct bfd_symbol **, long, struct bfd_symbol **,
 508 .     struct bfd_symbol **);
 509 .  {* Get the amount of memory required to hold the dynamic relocs.  *}
 510 .  long        (*_bfd_get_dynamic_reloc_upper_bound) (bfd *);
 511 .  {* Read in the dynamic relocs.  *}
 512 .  long        (*_bfd_canonicalize_dynamic_reloc)
 513 .    (bfd *, arelent **, struct bfd_symbol **);
 514 .
 515
 516 A pointer to an alternative bfd_target in case the current one is not
 517 satisfactory.  This can happen when the target cpu supports both big
 518 and little endian code, and target chosen by the linker has the wrong
 519 endianness.  The function open_output() in ld/ldlang.c uses this field
 520 to find an alternative output format that is suitable.
 521
 522 .  {* Opposite endian version of this target.  *}
 523 .  const struct bfd_target * alternative_target;
 524 .
 525
 526 .  {* Data for use by back-end routines, which isn't
 527 .     generic enough to belong in this structure.  *}
 528 .  const void *backend_data;
 529 .
 530 .} bfd_target;
 531 .
 532 */
 533
 534 /* All known xvecs (even those that don't compile on all systems).
 535    Alphabetized for easy reference.
 536    They are listed a second time below, since
 537    we can't intermix extern's and initializers.  */
 538 extern const bfd_target a_out_adobe_vec;
 539 extern const bfd_target aix5coff64_vec;
 540 extern const bfd_target aout0_big_vec;
 541 extern const bfd_target aout_arm_big_vec;
 542 extern const bfd_target aout_arm_little_vec;
 543 extern const bfd_target aout_mips_big_vec;
 544 extern const bfd_target aout_mips_little_vec;
 545 extern const bfd_target apollocoff_vec;
 546 extern const bfd_target arm_epoc_pe_big_vec;
 547 extern const bfd_target arm_epoc_pe_little_vec;
 548 extern const bfd_target arm_epoc_pei_big_vec;
 549 extern const bfd_target arm_epoc_pei_little_vec;
 550 extern const bfd_target arm_wince_pe_big_vec;
 551 extern const bfd_target arm_wince_pe_little_vec;
 552 extern const bfd_target arm_wince_pei_big_vec;
 553 extern const bfd_target arm_wince_pei_little_vec;
 554 extern const bfd_target armcoff_big_vec;
 555 extern const bfd_target armcoff_little_vec;
 556 extern const bfd_target armnetbsd_vec;
 557 extern const bfd_target armpe_big_vec;
 558 extern const bfd_target armpe_little_vec;
 559 extern const bfd_target armpei_big_vec;
 560 extern const bfd_target armpei_little_vec;
 561 extern const bfd_target b_out_vec_big_host;
 562 extern const bfd_target b_out_vec_little_host;
 563 extern const bfd_target bfd_efi_app_ia32_vec;
 564 extern const bfd_target bfd_efi_bsdrv_ia32_vec;
 565 extern const bfd_target bfd_efi_rtdrv_ia32_vec;
 566 extern const bfd_target bfd_efi_app_x86_64_vec;
 567 extern const bfd_target bfd_efi_bsdrv_x86_64_vec;
 568 extern const bfd_target bfd_efi_rtdrv_x86_64_vec;
 569 extern const bfd_target bfd_efi_app_ia64_vec;
 570 extern const bfd_target bfd_efi_bsdrv_ia64_vec;
 571 extern const bfd_target bfd_efi_rtdrv_ia64_vec;
 572 extern const bfd_target bfd_elf32_avr_vec;
 573 extern const bfd_target bfd_elf32_bfin_vec;
 574 extern const bfd_target bfd_elf32_bfinfdpic_vec;
 575 extern const bfd_target bfd_elf32_big_generic_vec;
 576 extern const bfd_target bfd_elf32_bigarc_vec;
 577 extern const bfd_target bfd_elf32_bigarm_vec;
 578 extern const bfd_target bfd_elf32_bigarm_symbian_vec;
 579 extern const bfd_target bfd_elf32_bigarm_vxworks_vec;
 580 extern const bfd_target bfd_elf32_bigmips_vec;
 581 extern const bfd_target bfd_elf32_bigmips_vxworks_vec;
 582 extern const bfd_target bfd_elf32_cr16_vec;
 583 extern const bfd_target bfd_elf32_cr16c_vec;
 584 extern const bfd_target bfd_elf32_cris_vec;
 585 extern const bfd_target bfd_elf32_crx_vec;
 586 extern const bfd_target bfd_elf32_d10v_vec;
 587 extern const bfd_target bfd_elf32_d30v_vec;
 588 extern const bfd_target bfd_elf32_dlx_big_vec;
 589 extern const bfd_target bfd_elf32_fr30_vec;
 590 extern const bfd_target bfd_elf32_frv_vec;
 591 extern const bfd_target bfd_elf32_frvfdpic_vec;
 592 extern const bfd_target bfd_elf32_h8300_vec;
 593 extern const bfd_target bfd_elf32_hppa_linux_vec;
 594 extern const bfd_target bfd_elf32_hppa_nbsd_vec;
 595 extern const bfd_target bfd_elf32_hppa_vec;
 596 extern const bfd_target bfd_elf32_i370_vec;
 597 extern const bfd_target bfd_elf32_i386_freebsd_vec;
 598 extern const bfd_target bfd_elf32_i386_vxworks_vec;
 599 extern const bfd_target bfd_elf32_i386_vec;
 600 extern const bfd_target bfd_elf32_i860_little_vec;
 601 extern const bfd_target bfd_elf32_i860_vec;
 602 extern const bfd_target bfd_elf32_i960_vec;
 603 extern const bfd_target bfd_elf32_ia64_big_vec;
 604 extern const bfd_target bfd_elf32_ia64_hpux_big_vec;
 605 extern const bfd_target bfd_elf32_ip2k_vec;
 606 extern const bfd_target bfd_elf32_iq2000_vec;
 607 extern const bfd_target bfd_elf32_lm32_vec;
 608 extern const bfd_target bfd_elf32_lm32fdpic_vec;
 609 extern const bfd_target bfd_elf32_little_generic_vec;
 610 extern const bfd_target bfd_elf32_littlearc_vec;
 611 extern const bfd_target bfd_elf32_littlearm_vec;
 612 extern const bfd_target bfd_elf32_littlearm_symbian_vec;
 613 extern const bfd_target bfd_elf32_littlearm_vxworks_vec;
 614 extern const bfd_target bfd_elf32_littlemips_vec;
 615 extern const bfd_target bfd_elf32_littlemips_vxworks_vec;
 616 extern const bfd_target bfd_elf32_m32c_vec;
 617 extern const bfd_target bfd_elf32_m32r_vec;
 618 extern const bfd_target bfd_elf32_m32rle_vec;
 619 extern const bfd_target bfd_elf32_m32rlin_vec;
 620 extern const bfd_target bfd_elf32_m32rlelin_vec;
 621 extern const bfd_target bfd_elf32_m68hc11_vec;
 622 extern const bfd_target bfd_elf32_m68hc12_vec;
 623 extern const bfd_target bfd_elf32_m68k_vec;
 624 extern const bfd_target bfd_elf32_m88k_vec;
 625 extern const bfd_target bfd_elf32_mcore_big_vec;
 626 extern const bfd_target bfd_elf32_mcore_little_vec;
 627 extern const bfd_target bfd_elf32_mep_vec;
 628 extern const bfd_target bfd_elf32_mep_little_vec;
 629 extern const bfd_target bfd_elf32_mn10200_vec;
 630 extern const bfd_target bfd_elf32_mn10300_vec;
 631 extern const bfd_target bfd_elf32_mt_vec;
 632 extern const bfd_target bfd_elf32_msp430_vec;
 633 extern const bfd_target bfd_elf32_nbigmips_vec;
 634 extern const bfd_target bfd_elf32_nlittlemips_vec;
 635 extern const bfd_target bfd_elf32_ntradbigmips_vec;
 636 extern const bfd_target bfd_elf32_ntradlittlemips_vec;
 637 extern const bfd_target bfd_elf32_openrisc_vec;
 638 extern const bfd_target bfd_elf32_or32_big_vec;
 639 extern const bfd_target bfd_elf32_pj_vec;
 640 extern const bfd_target bfd_elf32_pjl_vec;
 641 extern const bfd_target bfd_elf32_powerpc_vec;
 642 extern const bfd_target bfd_elf32_powerpcle_vec;
 643 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
 644 extern const bfd_target bfd_elf32_s390_vec;
 645 extern const bfd_target bfd_elf32_bigscore_vec;
 646 extern const bfd_target bfd_elf32_littlescore_vec;
 647 extern const bfd_target bfd_elf32_sh64_vec;
 648 extern const bfd_target bfd_elf32_sh64l_vec;
 649 extern const bfd_target bfd_elf32_sh64lin_vec;
 650 extern const bfd_target bfd_elf32_sh64blin_vec;
 651 extern const bfd_target bfd_elf32_sh64lnbsd_vec;
 652 extern const bfd_target bfd_elf32_sh64nbsd_vec;
 653 extern const bfd_target bfd_elf32_sh_vec;
 654 extern const bfd_target bfd_elf32_shblin_vec;
 655 extern const bfd_target bfd_elf32_shl_vec;
 656 extern const bfd_target bfd_elf32_shl_symbian_vec;
 657 extern const bfd_target bfd_elf32_shlin_vec;
 658 extern const bfd_target bfd_elf32_shlnbsd_vec;
 659 extern const bfd_target bfd_elf32_shlvxworks_vec;
 660 extern const bfd_target bfd_elf32_shnbsd_vec;
 661 extern const bfd_target bfd_elf32_shvxworks_vec;
 662 extern const bfd_target bfd_elf32_sparc_vec;
 663 extern const bfd_target bfd_elf32_sparc_vxworks_vec;
 664 extern const bfd_target bfd_elf32_spu_vec;
 665 extern const bfd_target bfd_elf32_tradbigmips_vec;
 666 extern const bfd_target bfd_elf32_tradlittlemips_vec;
 667 extern const bfd_target bfd_elf32_us_cris_vec;
 668 extern const bfd_target bfd_elf32_v850_vec;
 669 extern const bfd_target bfd_elf32_vax_vec;
 670 extern const bfd_target bfd_elf32_xc16x_vec;
 671 extern const bfd_target bfd_elf32_xstormy16_vec;
 672 extern const bfd_target bfd_elf32_xtensa_be_vec;
 673 extern const bfd_target bfd_elf32_xtensa_le_vec;
 674 extern const bfd_target bfd_elf64_alpha_freebsd_vec;
 675 extern const bfd_target bfd_elf64_alpha_vec;
 676 extern const bfd_target bfd_elf64_big_generic_vec;
 677 extern const bfd_target bfd_elf64_bigmips_vec;
 678 extern const bfd_target bfd_elf64_hppa_linux_vec;
 679 extern const bfd_target bfd_elf64_hppa_vec;
 680 extern const bfd_target bfd_elf64_ia64_big_vec;
 681 extern const bfd_target bfd_elf64_ia64_hpux_big_vec;
 682 extern const bfd_target bfd_elf64_ia64_little_vec;
 683 extern const bfd_target bfd_elf64_ia64_vms_vec;
 684 extern const bfd_target bfd_elf64_little_generic_vec;
 685 extern const bfd_target bfd_elf64_littlemips_vec;
 686 extern const bfd_target bfd_elf64_mmix_vec;
 687 extern const bfd_target bfd_elf64_powerpc_vec;
 688 extern const bfd_target bfd_elf64_powerpcle_vec;
 689 extern const bfd_target bfd_elf64_s390_vec;
 690 extern const bfd_target bfd_elf64_sh64_vec;
 691 extern const bfd_target bfd_elf64_sh64l_vec;
 692 extern const bfd_target bfd_elf64_sh64lin_vec;
 693 extern const bfd_target bfd_elf64_sh64blin_vec;
 694 extern const bfd_target bfd_elf64_sh64lnbsd_vec;
 695 extern const bfd_target bfd_elf64_sh64nbsd_vec;
 696 extern const bfd_target bfd_elf64_sparc_vec;
 697 extern const bfd_target bfd_elf64_sparc_freebsd_vec;
 698 extern const bfd_target bfd_elf64_tradbigmips_vec;
 699 extern const bfd_target bfd_elf64_tradlittlemips_vec;
 700 extern const bfd_target bfd_elf64_x86_64_freebsd_vec;
 701 extern const bfd_target bfd_elf64_x86_64_vec;
 702 extern const bfd_target bfd_mmo_vec;
 703 extern const bfd_target bfd_powerpc_pe_vec;
 704 extern const bfd_target bfd_powerpc_pei_vec;
 705 extern const bfd_target bfd_powerpcle_pe_vec;
 706 extern const bfd_target bfd_powerpcle_pei_vec;
 707 extern const bfd_target cris_aout_vec;
 708 extern const bfd_target demo_64_vec;
 709 extern const bfd_target ecoff_big_vec;
 710 extern const bfd_target ecoff_biglittle_vec;
 711 extern const bfd_target ecoff_little_vec;
 712 extern const bfd_target ecoffalpha_little_vec;
 713 extern const bfd_target go32coff_vec;
 714 extern const bfd_target go32stubbedcoff_vec;
 715 extern const bfd_target h8300coff_vec;
 716 extern const bfd_target h8500coff_vec;
 717 extern const bfd_target host_aout_vec;
 718 extern const bfd_target hp300bsd_vec;
 719 extern const bfd_target hp300hpux_vec;
 720 extern const bfd_target i386aout_vec;
 721 extern const bfd_target i386bsd_vec;
 722 extern const bfd_target i386coff_vec;
 723 extern const bfd_target i386dynix_vec;
 724 extern const bfd_target i386freebsd_vec;
 725 extern const bfd_target i386linux_vec;
 726 extern const bfd_target i386lynx_aout_vec;
 727 extern const bfd_target i386lynx_coff_vec;
 728 extern const bfd_target i386mach3_vec;
 729 extern const bfd_target i386msdos_vec;
 730 extern const bfd_target i386netbsd_vec;
 731 extern const bfd_target i386os9k_vec;
 732 extern const bfd_target i386pe_vec;
 733 extern const bfd_target i386pei_vec;
 734 extern const bfd_target i860coff_vec;
 735 extern const bfd_target icoff_big_vec;
 736 extern const bfd_target icoff_little_vec;
 737 extern const bfd_target ieee_vec;
 738 extern const bfd_target m68k4knetbsd_vec;
 739 extern const bfd_target m68kaux_coff_vec;
 740 extern const bfd_target m68kcoff_vec;
 741 extern const bfd_target m68kcoffun_vec;
 742 extern const bfd_target m68klinux_vec;
 743 extern const bfd_target m68knetbsd_vec;
 744 extern const bfd_target m68ksysvcoff_vec;
 745 extern const bfd_target m88kbcs_vec;
 746 extern const bfd_target m88kmach3_vec;
 747 extern const bfd_target m88kopenbsd_vec;
 748 extern const bfd_target mach_o_be_vec;
 749 extern const bfd_target mach_o_le_vec;
 750 extern const bfd_target mach_o_fat_vec;
 751 extern const bfd_target maxqcoff_vec;
 752 extern const bfd_target mcore_pe_big_vec;
 753 extern const bfd_target mcore_pe_little_vec;
 754 extern const bfd_target mcore_pei_big_vec;
 755 extern const bfd_target mcore_pei_little_vec;
 756 extern const bfd_target mipslpe_vec;
 757 extern const bfd_target mipslpei_vec;
 758 extern const bfd_target newsos3_vec;
 759 extern const bfd_target nlm32_alpha_vec;
 760 extern const bfd_target nlm32_i386_vec;
 761 extern const bfd_target nlm32_powerpc_vec;
 762 extern const bfd_target nlm32_sparc_vec;
 763 extern const bfd_target oasys_vec;
 764 extern const bfd_target or32coff_big_vec;
 765 extern const bfd_target pc532machaout_vec;
 766 extern const bfd_target pc532netbsd_vec;
 767 extern const bfd_target pdp11_aout_vec;
 768 extern const bfd_target pef_vec;
 769 extern const bfd_target pef_xlib_vec;
 770 extern const bfd_target pmac_xcoff_vec;
 771 extern const bfd_target ppcboot_vec;
 772 extern const bfd_target riscix_vec;
 773 extern const bfd_target rs6000coff64_vec;
 774 extern const bfd_target rs6000coff_vec;
 775 extern const bfd_target shcoff_small_vec;
 776 extern const bfd_target shcoff_vec;
 777 extern const bfd_target shlcoff_small_vec;
 778 extern const bfd_target shlcoff_vec;
 779 extern const bfd_target shlpe_vec;
 780 extern const bfd_target shlpei_vec;
 781 extern const bfd_target som_vec;
 782 extern const bfd_target sparccoff_vec;
 783 extern const bfd_target sparcle_aout_vec;
 784 extern const bfd_target sparclinux_vec;
 785 extern const bfd_target sparclynx_aout_vec;
 786 extern const bfd_target sparclynx_coff_vec;
 787 extern const bfd_target sparcnetbsd_vec;
 788 extern const bfd_target sunos_big_vec;
 789 extern const bfd_target sym_vec;
 790 extern const bfd_target tic30_aout_vec;
 791 extern const bfd_target tic30_coff_vec;
 792 extern const bfd_target tic4x_coff0_beh_vec;
 793 extern const bfd_target tic4x_coff0_vec;
 794 extern const bfd_target tic4x_coff1_beh_vec;
 795 extern const bfd_target tic4x_coff1_vec;
 796 extern const bfd_target tic4x_coff2_beh_vec;
 797 extern const bfd_target tic4x_coff2_vec;
 798 extern const bfd_target tic54x_coff0_beh_vec;
 799 extern const bfd_target tic54x_coff0_vec;
 800 extern const bfd_target tic54x_coff1_beh_vec;
 801 extern const bfd_target tic54x_coff1_vec;
 802 extern const bfd_target tic54x_coff2_beh_vec;
 803 extern const bfd_target tic54x_coff2_vec;
 804 extern const bfd_target tic80coff_vec;
 805 extern const bfd_target vaxbsd_vec;
 806 extern const bfd_target vaxnetbsd_vec;
 807 extern const bfd_target vax1knetbsd_vec;
 808 extern const bfd_target versados_vec;
 809 extern const bfd_target vms_alpha_vec;
 810 extern const bfd_target vms_vax_vec;
 811 extern const bfd_target w65_vec;
 812 extern const bfd_target we32kcoff_vec;
 813 extern const bfd_target x86_64pe_vec;
 814 extern const bfd_target x86_64pei_vec;
 815 extern const bfd_target x86_64coff_vec;
 816 extern const bfd_target z80coff_vec;
 817 extern const bfd_target z8kcoff_vec;
 818
 819 /* These are always included.  */
 820 extern const bfd_target srec_vec;
 821 extern const bfd_target symbolsrec_vec;
 822 extern const bfd_target tekhex_vec;
 823 extern const bfd_target binary_vec;
 824 extern const bfd_target ihex_vec;
 825
 826 /* All of the xvecs for core files.  */
 827 extern const bfd_target aix386_core_vec;
 828 extern const bfd_target cisco_core_big_vec;
 829 extern const bfd_target cisco_core_little_vec;
 830 extern const bfd_target hppabsd_core_vec;
 831 extern const bfd_target hpux_core_vec;
 832 extern const bfd_target irix_core_vec;
 833 extern const bfd_target netbsd_core_vec;
 834 extern const bfd_target osf_core_vec;
 835 extern const bfd_target ptrace_core_vec;
 836 extern const bfd_target sco5_core_vec;
 837 extern const bfd_target trad_core_vec;
 838
 839 extern const bfd_target bfd_elf32_am33lin_vec;
 840 static const bfd_target * const _bfd_target_vector[] =
 841 {
 842 #ifdef SELECT_VECS
 843
 844         SELECT_VECS,
 845
 846 #else /* not SELECT_VECS */
 847
 848 #ifdef DEFAULT_VECTOR
 849         &DEFAULT_VECTOR,
 850 #endif
 851         /* This list is alphabetized to make it easy to compare
 852            with other vector lists -- the decls above and
 853            the case statement in configure.in.
 854            Vectors that don't compile on all systems, or aren't finished,
 855            should have an entry here with #if 0 around it, to show that
 856            it wasn't omitted by mistake.  */
 857         &a_out_adobe_vec,
 858 #ifdef BFD64
 859         &aix5coff64_vec,
 860 #endif
 861         &aout0_big_vec,
 862 #if 0
 863         /* We have no way of distinguishing these from other a.out variants.  */
 864         &aout_arm_big_vec,
 865         &aout_arm_little_vec,
 866         /* No one seems to use this.  */
 867         &aout_mips_big_vec,
 868 #endif
 869         &aout_mips_little_vec,
 870 #if 0
 871         &apollocoff_vec,
 872 #endif
 873         &arm_epoc_pe_big_vec,
 874         &arm_epoc_pe_little_vec,
 875         &arm_epoc_pei_big_vec,
 876         &arm_epoc_pei_little_vec,
 877         &arm_wince_pe_big_vec,
 878         &arm_wince_pe_little_vec,
 879         &arm_wince_pei_big_vec,
 880         &arm_wince_pei_little_vec,
 881         &armcoff_big_vec,
 882         &armcoff_little_vec,
 883         &armnetbsd_vec,
 884         &armpe_big_vec,
 885         &armpe_little_vec,
 886         &armpei_big_vec,
 887         &armpei_little_vec,
 888         &b_out_vec_big_host,
 889         &b_out_vec_little_host,
 890         &bfd_efi_app_ia32_vec,
 891         &bfd_efi_bsdrv_ia32_vec,
 892         &bfd_efi_rtdrv_ia32_vec,
 893 #ifdef BFD64
 894         &bfd_efi_app_x86_64_vec,
 895         &bfd_efi_bsdrv_x86_64_vec,
 896         &bfd_efi_rtdrv_x86_64_vec,
 897         &bfd_efi_app_ia64_vec,
 898         &bfd_efi_bsdrv_ia64_vec,
 899         &bfd_efi_rtdrv_ia64_vec,
 900 #endif
 901         &bfd_elf32_avr_vec,
 902         &bfd_elf32_bfin_vec,
 903         &bfd_elf32_bfinfdpic_vec,
 904
 905         /* This, and other vectors, may not be used in any *.mt configuration.
 906            But that does not mean they are unnecessary.  If configured with
 907            --enable-targets=all, objdump or gdb should be able to examine
 908            the file even if we don't recognize the machine type.  */
 909         &bfd_elf32_big_generic_vec,
 910         &bfd_elf32_bigarc_vec,
 911         &bfd_elf32_bigarm_vec,
 912         &bfd_elf32_bigarm_symbian_vec,
 913         &bfd_elf32_bigarm_vxworks_vec,
 914         &bfd_elf32_bigmips_vec,
 915         &bfd_elf32_bigmips_vxworks_vec,
 916         &bfd_elf32_cr16_vec,
 917         &bfd_elf32_cr16c_vec,
 918         &bfd_elf32_cris_vec,
 919         &bfd_elf32_crx_vec,
 920         &bfd_elf32_d10v_vec,
 921         &bfd_elf32_d30v_vec,
 922         &bfd_elf32_dlx_big_vec,
 923         &bfd_elf32_fr30_vec,
 924         &bfd_elf32_frv_vec,
 925         &bfd_elf32_frvfdpic_vec,
 926         &bfd_elf32_h8300_vec,
 927         &bfd_elf32_hppa_linux_vec,
 928         &bfd_elf32_hppa_nbsd_vec,
 929         &bfd_elf32_hppa_vec,
 930         &bfd_elf32_i370_vec,
 931         &bfd_elf32_i386_freebsd_vec,
 932         &bfd_elf32_i386_vxworks_vec,
 933         &bfd_elf32_i386_vec,
 934         &bfd_elf32_i860_little_vec,
 935         &bfd_elf32_i860_vec,
 936         &bfd_elf32_i960_vec,
 937 #if 0
 938         &bfd_elf32_ia64_big_vec,
 939 #endif
 940 #ifdef BFD64
 941         &bfd_elf32_ia64_hpux_big_vec,
 942 #endif
 943         &bfd_elf32_ip2k_vec,
 944         &bfd_elf32_iq2000_vec,
 945         &bfd_elf32_lm32_vec,
 946         &bfd_elf32_little_generic_vec,
 947         &bfd_elf32_littlearc_vec,
 948         &bfd_elf32_littlearm_vec,
 949         &bfd_elf32_littlearm_symbian_vec,
 950         &bfd_elf32_littlearm_vxworks_vec,
 951         &bfd_elf32_littlemips_vec,
 952         &bfd_elf32_littlemips_vxworks_vec,
 953         &bfd_elf32_m32c_vec,
 954         &bfd_elf32_m32r_vec,
 955         &bfd_elf32_m32rle_vec,
 956         &bfd_elf32_m32rlin_vec,
 957         &bfd_elf32_m32rlelin_vec,
 958         &bfd_elf32_m68hc11_vec,
 959         &bfd_elf32_m68hc12_vec,
 960         &bfd_elf32_m68k_vec,
 961         &bfd_elf32_m88k_vec,
 962         &bfd_elf32_mcore_big_vec,
 963         &bfd_elf32_mcore_little_vec,
 964         &bfd_elf32_mep_vec,
 965         &bfd_elf32_mn10200_vec,
 966         &bfd_elf32_mn10300_vec,
 967         &bfd_elf32_mt_vec,
 968         &bfd_elf32_msp430_vec,
 969 #ifdef BFD64
 970         &bfd_elf32_nbigmips_vec,
 971         &bfd_elf32_nlittlemips_vec,
 972         &bfd_elf32_ntradbigmips_vec,
 973         &bfd_elf32_ntradlittlemips_vec,
 974 #endif
 975         &bfd_elf32_openrisc_vec,
 976         &bfd_elf32_or32_big_vec,
 977         &bfd_elf32_pj_vec,
 978         &bfd_elf32_pjl_vec,
 979         &bfd_elf32_powerpc_vec,
 980         &bfd_elf32_powerpc_vxworks_vec,
 981         &bfd_elf32_powerpcle_vec,
 982         &bfd_elf32_s390_vec,
 983         &bfd_elf32_bigscore_vec,
 984         &bfd_elf32_littlescore_vec,
 985         &bfd_elf32_sh_vec,
 986         &bfd_elf32_shblin_vec,
 987         &bfd_elf32_shl_vec,
 988         &bfd_elf32_shl_symbian_vec,
 989         &bfd_elf32_shlin_vec,
 990         &bfd_elf32_shlnbsd_vec,
 991         &bfd_elf32_shlvxworks_vec,
 992         &bfd_elf32_shnbsd_vec,
 993         &bfd_elf32_shvxworks_vec,
 994 #ifdef BFD64
 995         &bfd_elf32_sh64_vec,
 996         &bfd_elf32_sh64l_vec,
 997         &bfd_elf32_sh64lnbsd_vec,
 998         &bfd_elf32_sh64nbsd_vec,
 999         &bfd_elf32_sh64lin_vec,
1000         &bfd_elf32_sh64blin_vec,
1001 #endif
1002         &bfd_elf32_sparc_vec,
1003         &bfd_elf32_sparc_vxworks_vec,
1004         &bfd_elf32_spu_vec,
1005         &bfd_elf32_tradbigmips_vec,
1006         &bfd_elf32_tradlittlemips_vec,
1007         &bfd_elf32_us_cris_vec,
1008         &bfd_elf32_v850_vec,
1009         &bfd_elf32_vax_vec,
1010         &bfd_elf32_xc16x_vec,
1011         &bfd_elf32_xstormy16_vec,
1012         &bfd_elf32_xtensa_be_vec,
1013         &bfd_elf32_xtensa_le_vec,
1014 #ifdef BFD64
1015         &bfd_elf64_alpha_freebsd_vec,
1016         &bfd_elf64_alpha_vec,
1017         &bfd_elf64_big_generic_vec,
1018         &bfd_elf64_bigmips_vec,
1019         &bfd_elf64_hppa_linux_vec,
1020         &bfd_elf64_hppa_vec,
1021         &bfd_elf64_ia64_big_vec,
1022         &bfd_elf64_ia64_hpux_big_vec,
1023         &bfd_elf64_ia64_little_vec,
1024         &bfd_elf64_ia64_vms_vec,
1025         &bfd_elf64_little_generic_vec,
1026         &bfd_elf64_littlemips_vec,
1027         &bfd_elf64_mmix_vec,
1028         &bfd_elf64_powerpc_vec,
1029         &bfd_elf64_powerpcle_vec,
1030         &bfd_elf64_s390_vec,
1031         &bfd_elf64_sh64_vec,
1032         &bfd_elf64_sh64l_vec,
1033         &bfd_elf64_sh64lnbsd_vec,
1034         &bfd_elf64_sh64nbsd_vec,
1035         &bfd_elf64_sh64lin_vec,
1036         &bfd_elf64_sh64blin_vec,
1037         &bfd_elf64_sparc_vec,
1038         &bfd_elf64_sparc_freebsd_vec,
1039         &bfd_elf64_tradbigmips_vec,
1040         &bfd_elf64_tradlittlemips_vec,
1041         &bfd_elf64_x86_64_freebsd_vec,
1042         &bfd_elf64_x86_64_vec,
1043         &bfd_mmo_vec,
1044 #endif
1045         &bfd_powerpc_pe_vec,
1046         &bfd_powerpc_pei_vec,
1047         &bfd_powerpcle_pe_vec,
1048         &bfd_powerpcle_pei_vec,
1049         &cris_aout_vec,
1050 #ifdef BFD64
1051         &demo_64_vec,   /* Only compiled if host has long-long support.  */
1052 #endif
1053         &ecoff_big_vec,
1054         &ecoff_biglittle_vec,
1055         &ecoff_little_vec,
1056 #ifdef BFD64
1057         &ecoffalpha_little_vec,
1058 #endif
1059         &go32coff_vec,
1060         &go32stubbedcoff_vec,
1061         &h8300coff_vec,
1062         &h8500coff_vec,
1063 #if 0
1064         /* Since a.out files lack decent magic numbers, no way to recognize
1065            which kind of a.out file it is.  */
1066         &host_aout_vec,
1067         /* Clashes with sunos_big_vec magic no.  */
1068         &hp300bsd_vec,
1069 #endif
1070         &hp300hpux_vec,
1071         &i386aout_vec,
1072         &i386bsd_vec,
1073         &i386coff_vec,
1074 #if 0
1075         &i386dynix_vec,
1076 #endif
1077         &i386freebsd_vec,
1078 #if 0
1079         /* Since a.out files lack decent magic numbers, no way to recognize
1080            which kind of a.out file it is.  */
1081         &i386linux_vec,
1082 #endif
1083         &i386lynx_aout_vec,
1084         &i386lynx_coff_vec,
1085 #if 0
1086         /* No distinguishing features for Mach 3 executables.  */
1087         &i386mach3_vec,
1088 #endif
1089         &i386msdos_vec,
1090         &i386netbsd_vec,
1091         &i386os9k_vec,
1092         &i386pe_vec,
1093         &i386pei_vec,
1094 #ifdef BFD64
1095         &x86_64coff_vec,
1096         &x86_64pe_vec,
1097         &x86_64pei_vec,
1098 #endif
1099         &i860coff_vec,
1100         &icoff_big_vec,
1101         &icoff_little_vec,
1102         &ieee_vec,
1103 #if 0
1104         &m68k4knetbsd_vec,
1105         &m68kaux_coff_vec,
1106 #endif
1107         &m68kcoff_vec,
1108         &m68kcoffun_vec,
1109 #if 0
1110         /* Since a.out files lack decent magic numbers, no way to recognize
1111            which kind of a.out file it is.  */
1112         &m68klinux_vec,
1113 #endif
1114         &m68knetbsd_vec,
1115         &m68ksysvcoff_vec,
1116         &m88kbcs_vec,
1117         &m88kmach3_vec,
1118         &m88kopenbsd_vec,
1119         &mach_o_be_vec,
1120         &mach_o_le_vec,
1121         &mach_o_fat_vec,
1122         &maxqcoff_vec,
1123         &mcore_pe_big_vec,
1124         &mcore_pe_little_vec,
1125         &mcore_pei_big_vec,
1126         &mcore_pei_little_vec,
1127         &mipslpe_vec,
1128         &mipslpei_vec,
1129         &newsos3_vec,
1130 #ifdef BFD64
1131         &nlm32_alpha_vec,
1132 #endif
1133         &nlm32_i386_vec,
1134         &nlm32_powerpc_vec,
1135         &nlm32_sparc_vec,
1136 #if 0
1137         /* We have no oasys tools anymore, so we can't test any of this
1138            anymore. If you want to test the stuff yourself, go ahead...
1139            steve@cygnus.com
1140            Worse, since there is no magic number for archives, there
1141            can be annoying target mis-matches.  */
1142         &oasys_vec,
1143 #endif
1144         /* Entry for the OpenRISC family.  */
1145         &or32coff_big_vec,
1146
1147         &pc532machaout_vec,
1148         &pc532netbsd_vec,
1149         &pdp11_aout_vec,
1150         &pef_vec,
1151         &pef_xlib_vec,
1152 #if 0
1153         /* This has the same magic number as RS/6000.  */
1154         &pmac_xcoff_vec,
1155 #endif
1156         &ppcboot_vec,
1157 #if 0
1158         /* We have no way of distinguishing these from other a.out variants.  */
1159         &riscix_vec,
1160 #endif
1161 #ifdef BFD64
1162         &rs6000coff64_vec,
1163 #endif
1164         &rs6000coff_vec,
1165         &shcoff_small_vec,
1166         &shcoff_vec,
1167         &shlcoff_small_vec,
1168         &shlcoff_vec,
1169         &shlpe_vec,
1170         &shlpei_vec,
1171 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
1172         &som_vec,
1173 #endif
1174         &sparccoff_vec,
1175         &sparcle_aout_vec,
1176         &sparclinux_vec,
1177         &sparclynx_aout_vec,
1178         &sparclynx_coff_vec,
1179         &sparcnetbsd_vec,
1180         &sunos_big_vec,
1181         &sym_vec,
1182         &tic30_aout_vec,
1183         &tic30_coff_vec,
1184         &tic54x_coff0_beh_vec,
1185         &tic54x_coff0_vec,
1186         &tic54x_coff1_beh_vec,
1187         &tic54x_coff1_vec,
1188         &tic54x_coff2_beh_vec,
1189         &tic54x_coff2_vec,
1190         &tic80coff_vec,
1191         &vaxbsd_vec,
1192         &vaxnetbsd_vec,
1193         &vax1knetbsd_vec,
1194         &versados_vec,
1195 #ifdef BFD64
1196         &vms_alpha_vec,
1197 #endif
1198         &vms_vax_vec,
1199         &w65_vec,
1200         &we32kcoff_vec,
1201         &z80coff_vec,
1202         &z8kcoff_vec,
1203         &bfd_elf32_am33lin_vec,
1204 #endif /* not SELECT_VECS */
1205
1206 /* Always support S-records, for convenience.  */
1207         &srec_vec,
1208         &symbolsrec_vec,
1209 /* And tekhex */
1210         &tekhex_vec,
1211 /* Likewise for binary output.  */
1212         &binary_vec,
1213 /* Likewise for ihex.  */
1214         &ihex_vec,
1215
1216 /* Add any required traditional-core-file-handler.  */
1217
1218 #ifdef AIX386_CORE
1219         &aix386_core_vec,
1220 #endif
1221 #if 0
1222         /* We don't include cisco_core_*_vec.  Although it has a magic number,
1223            the magic number isn't at the beginning of the file, and thus
1224            might spuriously match other kinds of files.  */
1225         &cisco_core_big_vec,
1226         &cisco_core_little_vec,
1227 #endif
1228 #ifdef HPPABSD_CORE
1229         &hppabsd_core_vec,
1230 #endif
1231 #ifdef HPUX_CORE
1232         &hpux_core_vec,
1233 #endif
1234 #ifdef IRIX_CORE
1235         &irix_core_vec,
1236 #endif
1237 #ifdef NETBSD_CORE
1238         &netbsd_core_vec,
1239 #endif
1240 #ifdef OSF_CORE
1241         &osf_core_vec,
1242 #endif
1243 #ifdef PTRACE_CORE
1244         &ptrace_core_vec,
1245 #endif
1246 #ifdef SCO5_CORE
1247         &sco5_core_vec,
1248 #endif
1249 #ifdef TRAD_CORE
1250         &trad_core_vec,
1251 #endif
1252
1253         NULL /* end of list marker */
1254 };
1255 const bfd_target * const *bfd_target_vector = _bfd_target_vector;
1256
1257 /* bfd_default_vector[0] contains either the address of the default vector,
1258    if there is one, or zero if there isn't.  */
1259
1260 const bfd_target *bfd_default_vector[] = {
1261 #ifdef DEFAULT_VECTOR
1262         &DEFAULT_VECTOR,
1263 #endif
1264         NULL
1265 };
1266
1267 /* bfd_associated_vector[] contains the associated target vectors used
1268    to reduce the ambiguity in bfd_check_format_matches.  */
1269
1270 static const bfd_target *_bfd_associated_vector[] = {
1271 #ifdef ASSOCIATED_VECS
1272         ASSOCIATED_VECS,
1273 #endif
1274         NULL
1275 };
1276 const bfd_target * const *bfd_associated_vector = _bfd_associated_vector;
1277
1278 /* When there is an ambiguous match, bfd_check_format_matches puts the
1279    names of the matching targets in an array.  This variable is the maximum
1280    number of entries that the array could possibly need.  */
1281 const size_t _bfd_target_vector_entries = sizeof (_bfd_target_vector)/sizeof (*_bfd_target_vector);
1282 \f
1283 /* This array maps configuration triplets onto BFD vectors.  */
1284
1285 struct targmatch
1286 {
1287   /* The configuration triplet.  */
1288   const char *triplet;
1289   /* The BFD vector.  If this is NULL, then the vector is found by
1290      searching forward for the next structure with a non NULL vector
1291      field.  */
1292   const bfd_target *vector;
1293 };
1294
1295 /* targmatch.h is built by Makefile out of config.bfd.  */
1296 static const struct targmatch bfd_target_match[] = {
1297 #include "targmatch.h"
1298   { NULL, NULL }
1299 };
1300
1301 /* Find a target vector, given a name or configuration triplet.  */
1302
1303 static const bfd_target *
1304 find_target (const char *name)
1305 {
1306   const bfd_target * const *target;
1307   const struct targmatch *match;
1308
1309   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1310     if (strcmp (name, (*target)->name) == 0)
1311       return *target;
1312
1313   /* If we couldn't match on the exact name, try matching on the
1314      configuration triplet.  FIXME: We should run the triplet through
1315      config.sub first, but that is hard.  */
1316   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1317     {
1318       if (fnmatch (match->triplet, name, 0) == 0)
1319         {
1320           while (match->vector == NULL)
1321             ++match;
1322           return match->vector;
1323         }
1324     }
1325
1326   bfd_set_error (bfd_error_invalid_target);
1327   return NULL;
1328 }
1329
1330 /*
1331 FUNCTION
1332         bfd_set_default_target
1333
1334 SYNOPSIS
1335         bfd_boolean bfd_set_default_target (const char *name);
1336
1337 DESCRIPTION
1338         Set the default target vector to use when recognizing a BFD.
1339         This takes the name of the target, which may be a BFD target
1340         name or a configuration triplet.
1341 */
1342
1343 bfd_boolean
1344 bfd_set_default_target (const char *name)
1345 {
1346   const bfd_target *target;
1347
1348   if (bfd_default_vector[0] != NULL
1349       && strcmp (name, bfd_default_vector[0]->name) == 0)
1350     return TRUE;
1351
1352   target = find_target (name);
1353   if (target == NULL)
1354     return FALSE;
1355
1356   bfd_default_vector[0] = target;
1357   return TRUE;
1358 }
1359
1360 /*
1361 FUNCTION
1362         bfd_find_target
1363
1364 SYNOPSIS
1365         const bfd_target *bfd_find_target (const char *target_name, bfd *abfd);
1366
1367 DESCRIPTION
1368         Return a pointer to the transfer vector for the object target
1369         named @var{target_name}.  If @var{target_name} is <<NULL>>,
1370         choose the one in the environment variable <<GNUTARGET>>; if
1371         that is null or not defined, then choose the first entry in the
1372         target list.  Passing in the string "default" or setting the
1373         environment variable to "default" will cause the first entry in
1374         the target list to be returned, and "target_defaulted" will be
1375         set in the BFD if @var{abfd} isn't <<NULL>>.  This causes
1376         <<bfd_check_format>> to loop over all the targets to find the
1377         one that matches the file being read.
1378 */
1379
1380 const bfd_target *
1381 bfd_find_target (const char *target_name, bfd *abfd)
1382 {
1383   const char *targname;
1384   const bfd_target *target;
1385
1386   if (target_name != NULL)
1387     targname = target_name;
1388   else
1389     targname = getenv ("GNUTARGET");
1390
1391   /* This is safe; the vector cannot be null.  */
1392   if (targname == NULL || strcmp (targname, "default") == 0)
1393     {
1394       if (bfd_default_vector[0] != NULL)
1395         target = bfd_default_vector[0];
1396       else
1397         target = bfd_target_vector[0];
1398       if (abfd)
1399         {
1400           abfd->xvec = target;
1401           abfd->target_defaulted = TRUE;
1402         }
1403       return target;
1404     }
1405
1406   if (abfd)
1407     abfd->target_defaulted = FALSE;
1408
1409   target = find_target (targname);
1410   if (target == NULL)
1411     return NULL;
1412
1413   if (abfd)
1414     abfd->xvec = target;
1415   return target;
1416 }
1417
1418 /*
1419 FUNCTION
1420         bfd_target_list
1421
1422 SYNOPSIS
1423         const char ** bfd_target_list (void);
1424
1425 DESCRIPTION
1426         Return a freshly malloced NULL-terminated
1427         vector of the names of all the valid BFD targets. Do not
1428         modify the names.
1429
1430 */
1431
1432 const char **
1433 bfd_target_list (void)
1434 {
1435   int vec_length = 0;
1436   bfd_size_type amt;
1437 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1438   /* The native compiler on the HP9000/700 has a bug which causes it
1439      to loop endlessly when compiling this file.  This avoids it.  */
1440   volatile
1441 #endif
1442   const bfd_target * const *target;
1443   const  char **name_list, **name_ptr;
1444
1445   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1446     vec_length++;
1447
1448   amt = (vec_length + 1) * sizeof (char **);
1449   name_ptr = name_list = bfd_malloc (amt);
1450
1451   if (name_list == NULL)
1452     return NULL;
1453
1454   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1455     if (target == &bfd_target_vector[0]
1456         || *target != bfd_target_vector[0])
1457       *name_ptr++ = (*target)->name;
1458
1459   *name_ptr = NULL;
1460   return name_list;
1461 }
1462
1463 /*
1464 FUNCTION
1465         bfd_seach_for_target
1466
1467 SYNOPSIS
1468         const bfd_target *bfd_search_for_target
1469           (int (*search_func) (const bfd_target *, void *),
1470            void *);
1471
1472 DESCRIPTION
1473         Return a pointer to the first transfer vector in the list of
1474         transfer vectors maintained by BFD that produces a non-zero
1475         result when passed to the function @var{search_func}.  The
1476         parameter @var{data} is passed, unexamined, to the search
1477         function.
1478 */
1479
1480 const bfd_target *
1481 bfd_search_for_target (int (*search_func) (const bfd_target *, void *),
1482                        void *data)
1483 {
1484   const bfd_target * const *target;
1485
1486   for (target = bfd_target_vector; *target != NULL; target ++)
1487     if (search_func (*target, data))
1488       return *target;
1489
1490   return NULL;
1491 }