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
   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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libbfd.h"
  26 #include "fnmatch.h"
  27
  28 /*
  29 SECTION
  30         Targets
  31
  32 DESCRIPTION
  33         Each port of BFD to a different machine requires the creation
  34         of a target back end. All the back end provides to the root
  35         part of BFD is a structure containing pointers to functions
  36         which perform certain low level operations on files. BFD
  37         translates the applications's requests through a pointer into
  38         calls to the back end routines.
  39
  40         When a file is opened with <<bfd_openr>>, its format and
  41         target are unknown. BFD uses various mechanisms to determine
  42         how to interpret the file. The operations performed are:
  43
  44         o Create a BFD by calling the internal routine
  45         <<_bfd_new_bfd>>, then call <<bfd_find_target>> with the
  46         target string supplied to <<bfd_openr>> and the new BFD pointer.
  47
  48         o If a null target string was provided to <<bfd_find_target>>,
  49         look up the environment variable <<GNUTARGET>> and use
  50         that as the target string.
  51
  52         o If the target string is still <<NULL>>, or the target string is
  53         <<default>>, then use the first item in the target vector
  54         as the target type, and set <<target_defaulted>> in the BFD to
  55         cause <<bfd_check_format>> to loop through all the targets.
  56         @xref{bfd_target}.  @xref{Formats}.
  57
  58         o Otherwise, inspect the elements in the target vector
  59         one by one, until a match on target name is found. When found,
  60         use it.
  61
  62         o Otherwise return the error <<bfd_error_invalid_target>> to
  63         <<bfd_openr>>.
  64
  65         o <<bfd_openr>> attempts to open the file using
  66         <<bfd_open_file>>, and returns the BFD.
  67
  68         Once the BFD has been opened and the target selected, the file
  69         format may be determined. This is done by calling
  70         <<bfd_check_format>> on the BFD with a suggested format.
  71         If <<target_defaulted>> has been set, each possible target
  72         type is tried to see if it recognizes the specified format.
  73         <<bfd_check_format>> returns <<TRUE>> when the caller guesses right.
  74 @menu
  75 @* bfd_target::
  76 @end menu
  77 */
  78
  79 /*
  80
  81 INODE
  82         bfd_target,  , Targets, Targets
  83 DOCDD
  84 SUBSECTION
  85         bfd_target
  86
  87 DESCRIPTION
  88         This structure contains everything that BFD knows about a
  89         target. It includes things like its byte order, name, and which
  90         routines to call to do various operations.
  91
  92         Every BFD points to a target structure with its <<xvec>>
  93         member.
  94
  95         The macros below are used to dispatch to functions through the
  96         <<bfd_target>> vector. They are used in a number of macros further
  97         down in @file{bfd.h}, and are also used when calling various
  98         routines by hand inside the BFD implementation.  The @var{arglist}
  99         argument must be parenthesized; it contains all the arguments
 100         to the called function.
 101
 102         They make the documentation (more) unpleasant to read, so if
 103         someone wants to fix this and not break the above, please do.
 104
 105 .#define BFD_SEND(bfd, message, arglist) \
 106 .  ((*((bfd)->xvec->message)) arglist)
 107 .
 108 .#ifdef DEBUG_BFD_SEND
 109 .#undef BFD_SEND
 110 .#define BFD_SEND(bfd, message, arglist) \
 111 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 112 .    ((*((bfd)->xvec->message)) arglist) : \
 113 .    (bfd_assert (__FILE__,__LINE__), NULL))
 114 .#endif
 115
 116         For operations which index on the BFD format:
 117
 118 .#define BFD_SEND_FMT(bfd, message, arglist) \
 119 .  (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist)
 120 .
 121 .#ifdef DEBUG_BFD_SEND
 122 .#undef BFD_SEND_FMT
 123 .#define BFD_SEND_FMT(bfd, message, arglist) \
 124 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 125 .   (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist) : \
 126 .   (bfd_assert (__FILE__,__LINE__), NULL))
 127 .#endif
 128 .
 129         This is the structure which defines the type of BFD this is.  The
 130         <<xvec>> member of the struct <<bfd>> itself points here.  Each
 131         module that implements access to a different target under BFD,
 132         defines one of these.
 133
 134         FIXME, these names should be rationalised with the names of
 135         the entry points which call them. Too bad we can't have one
 136         macro to define them both!
 137
 138 .enum bfd_flavour
 139 .{
 140 .  bfd_target_unknown_flavour,
 141 .  bfd_target_aout_flavour,
 142 .  bfd_target_coff_flavour,
 143 .  bfd_target_ecoff_flavour,
 144 .  bfd_target_xcoff_flavour,
 145 .  bfd_target_elf_flavour,
 146 .  bfd_target_ieee_flavour,
 147 .  bfd_target_nlm_flavour,
 148 .  bfd_target_oasys_flavour,
 149 .  bfd_target_tekhex_flavour,
 150 .  bfd_target_srec_flavour,
 151 .  bfd_target_ihex_flavour,
 152 .  bfd_target_som_flavour,
 153 .  bfd_target_os9k_flavour,
 154 .  bfd_target_versados_flavour,
 155 .  bfd_target_msdos_flavour,
 156 .  bfd_target_ovax_flavour,
 157 .  bfd_target_evax_flavour,
 158 .  bfd_target_mmo_flavour,
 159 .  bfd_target_mach_o_flavour,
 160 .  bfd_target_pef_flavour,
 161 .  bfd_target_pef_xlib_flavour,
 162 .  bfd_target_sym_flavour
 163 .};
 164 .
 165 .enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
 166 .
 167 .{* Forward declaration.  *}
 168 .typedef struct bfd_link_info _bfd_link_info;
 169 .
 170 .typedef struct bfd_target
 171 .{
 172 .  {* Identifies the kind of target, e.g., SunOS4, Ultrix, etc.  *}
 173 .  char *name;
 174 .
 175 . {* The "flavour" of a back end is a general indication about
 176 .    the contents of a file.  *}
 177 .  enum bfd_flavour flavour;
 178 .
 179 .  {* The order of bytes within the data area of a file.  *}
 180 .  enum bfd_endian byteorder;
 181 .
 182 . {* The order of bytes within the header parts of a file.  *}
 183 .  enum bfd_endian header_byteorder;
 184 .
 185 .  {* A mask of all the flags which an executable may have set -
 186 .     from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.  *}
 187 .  flagword object_flags;
 188 .
 189 . {* A mask of all the flags which a section may have set - from
 190 .    the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.  *}
 191 .  flagword section_flags;
 192 .
 193 . {* The character normally found at the front of a symbol.
 194 .    (if any), perhaps `_'.  *}
 195 .  char symbol_leading_char;
 196 .
 197 . {* The pad character for file names within an archive header.  *}
 198 .  char ar_pad_char;
 199 .
 200 .  {* The maximum number of characters in an archive header.  *}
 201 .  unsigned short ar_max_namelen;
 202 .
 203 .  {* Entries for byte swapping for data. These are different from the
 204 .     other entry points, since they don't take a BFD asthe first argument.
 205 .     Certain other handlers could do the same.  *}
 206 .  bfd_uint64_t   (*bfd_getx64) (const void *);
 207 .  bfd_int64_t    (*bfd_getx_signed_64) (const void *);
 208 .  void           (*bfd_putx64) (bfd_uint64_t, void *);
 209 .  bfd_vma        (*bfd_getx32) (const void *);
 210 .  bfd_signed_vma (*bfd_getx_signed_32) (const void *);
 211 .  void           (*bfd_putx32) (bfd_vma, void *);
 212 .  bfd_vma        (*bfd_getx16) (const void *);
 213 .  bfd_signed_vma (*bfd_getx_signed_16) (const void *);
 214 .  void           (*bfd_putx16) (bfd_vma, void *);
 215 .
 216 .  {* Byte swapping for the headers.  *}
 217 .  bfd_uint64_t   (*bfd_h_getx64) (const void *);
 218 .  bfd_int64_t    (*bfd_h_getx_signed_64) (const void *);
 219 .  void           (*bfd_h_putx64) (bfd_uint64_t, void *);
 220 .  bfd_vma        (*bfd_h_getx32) (const void *);
 221 .  bfd_signed_vma (*bfd_h_getx_signed_32) (const void *);
 222 .  void           (*bfd_h_putx32) (bfd_vma, void *);
 223 .  bfd_vma        (*bfd_h_getx16) (const void *);
 224 .  bfd_signed_vma (*bfd_h_getx_signed_16) (const void *);
 225 .  void           (*bfd_h_putx16) (bfd_vma, void *);
 226 .
 227 .  {* Format dependent routines: these are vectors of entry points
 228 .     within the target vector structure, one for each format to check.  *}
 229 .
 230 .  {* Check the format of a file being read.  Return a <<bfd_target *>> or zero.  *}
 231 .  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) (bfd *);
 232 .
 233 .  {* Set the format of a file being written.  *}
 234 .  bfd_boolean (*_bfd_set_format[bfd_type_end]) (bfd *);
 235 .
 236 .  {* Write cached information into a file being written, at <<bfd_close>>.  *}
 237 .  bfd_boolean (*_bfd_write_contents[bfd_type_end]) (bfd *);
 238 .
 239 The general target vector.  These vectors are initialized using the
 240 BFD_JUMP_TABLE macros.
 241 .
 242 .  {* Generic entry points.  *}
 243 .#define BFD_JUMP_TABLE_GENERIC(NAME) \
 244 .  NAME##_close_and_cleanup, \
 245 .  NAME##_bfd_free_cached_info, \
 246 .  NAME##_new_section_hook, \
 247 .  NAME##_get_section_contents, \
 248 .  NAME##_get_section_contents_in_window
 249 .
 250 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 251 .  bfd_boolean (*_close_and_cleanup) (bfd *);
 252 .  {* Ask the BFD to free all cached information.  *}
 253 .  bfd_boolean (*_bfd_free_cached_info) (bfd *);
 254 .  {* Called when a new section is created.  *}
 255 .  bfd_boolean (*_new_section_hook) (bfd *, sec_ptr);
 256 .  {* Read the contents of a section.  *}
 257 .  bfd_boolean (*_bfd_get_section_contents)
 258 .    (bfd *, sec_ptr, void *, file_ptr, bfd_size_type);
 259 .  bfd_boolean (*_bfd_get_section_contents_in_window)
 260 .    (bfd *, sec_ptr, bfd_window *, file_ptr, bfd_size_type);
 261 .
 262 .  {* Entry points to copy private data.  *}
 263 .#define BFD_JUMP_TABLE_COPY(NAME) \
 264 .  NAME##_bfd_copy_private_bfd_data, \
 265 .  NAME##_bfd_merge_private_bfd_data, \
 266 .  NAME##_bfd_copy_private_section_data, \
 267 .  NAME##_bfd_copy_private_symbol_data, \
 268 .  NAME##_bfd_set_private_flags, \
 269 .  NAME##_bfd_print_private_bfd_data
 270 .
 271 .  {* Called to copy BFD general private data from one object file
 272 .     to another.  *}
 273 .  bfd_boolean (*_bfd_copy_private_bfd_data) (bfd *, bfd *);
 274 .  {* Called to merge BFD general private data from one object file
 275 .     to a common output file when linking.  *}
 276 .  bfd_boolean (*_bfd_merge_private_bfd_data) (bfd *, bfd *);
 277 .  {* Called to copy BFD private section data from one object file
 278 .     to another.  *}
 279 .  bfd_boolean (*_bfd_copy_private_section_data)
 280 .    (bfd *, sec_ptr, bfd *, sec_ptr);
 281 .  {* Called to copy BFD private symbol data from one symbol
 282 .     to another.  *}
 283 .  bfd_boolean (*_bfd_copy_private_symbol_data)
 284 .    (bfd *, asymbol *, bfd *, asymbol *);
 285 .  {* Called to set private backend flags.  *}
 286 .  bfd_boolean (*_bfd_set_private_flags) (bfd *, flagword);
 287 .
 288 .  {* Called to print private BFD data.  *}
 289 .  bfd_boolean (*_bfd_print_private_bfd_data) (bfd *, void *);
 290 .
 291 .  {* Core file entry points.  *}
 292 .#define BFD_JUMP_TABLE_CORE(NAME) \
 293 .  NAME##_core_file_failing_command, \
 294 .  NAME##_core_file_failing_signal, \
 295 .  NAME##_core_file_matches_executable_p
 296 .
 297 .  char *      (*_core_file_failing_command) (bfd *);
 298 .  int         (*_core_file_failing_signal) (bfd *);
 299 .  bfd_boolean (*_core_file_matches_executable_p) (bfd *, bfd *);
 300 .
 301 .  {* Archive entry points.  *}
 302 .#define BFD_JUMP_TABLE_ARCHIVE(NAME) \
 303 .  NAME##_slurp_armap, \
 304 .  NAME##_slurp_extended_name_table, \
 305 .  NAME##_construct_extended_name_table, \
 306 .  NAME##_truncate_arname, \
 307 .  NAME##_write_armap, \
 308 .  NAME##_read_ar_hdr, \
 309 .  NAME##_openr_next_archived_file, \
 310 .  NAME##_get_elt_at_index, \
 311 .  NAME##_generic_stat_arch_elt, \
 312 .  NAME##_update_armap_timestamp
 313 .
 314 .  bfd_boolean (*_bfd_slurp_armap) (bfd *);
 315 .  bfd_boolean (*_bfd_slurp_extended_name_table) (bfd *);
 316 .  bfd_boolean (*_bfd_construct_extended_name_table)
 317 .    (bfd *, char **, bfd_size_type *, const char **);
 318 .  void        (*_bfd_truncate_arname) (bfd *, const char *, char *);
 319 .  bfd_boolean (*write_armap)
 320 .    (bfd *, unsigned int, struct orl *, unsigned int, int);
 321 .  void *      (*_bfd_read_ar_hdr_fn) (bfd *);
 322 .  bfd *       (*openr_next_archived_file) (bfd *, bfd *);
 323 .#define bfd_get_elt_at_index(b,i) BFD_SEND (b, _bfd_get_elt_at_index, (b,i))
 324 .  bfd *       (*_bfd_get_elt_at_index) (bfd *, symindex);
 325 .  int         (*_bfd_stat_arch_elt) (bfd *, struct stat *);
 326 .  bfd_boolean (*_bfd_update_armap_timestamp) (bfd *);
 327 .
 328 .  {* Entry points used for symbols.  *}
 329 .#define BFD_JUMP_TABLE_SYMBOLS(NAME) \
 330 .  NAME##_get_symtab_upper_bound, \
 331 .  NAME##_canonicalize_symtab, \
 332 .  NAME##_make_empty_symbol, \
 333 .  NAME##_print_symbol, \
 334 .  NAME##_get_symbol_info, \
 335 .  NAME##_bfd_is_local_label_name, \
 336 .  NAME##_get_lineno, \
 337 .  NAME##_find_nearest_line, \
 338 .  NAME##_bfd_make_debug_symbol, \
 339 .  NAME##_read_minisymbols, \
 340 .  NAME##_minisymbol_to_symbol
 341 .
 342 .  long        (*_bfd_get_symtab_upper_bound) (bfd *);
 343 .  long        (*_bfd_canonicalize_symtab)
 344 .    (bfd *, struct bfd_symbol **);
 345 .  struct bfd_symbol *
 346 .              (*_bfd_make_empty_symbol) (bfd *);
 347 .  void        (*_bfd_print_symbol)
 348 .    (bfd *, void *, struct bfd_symbol *, bfd_print_symbol_type);
 349 .#define bfd_print_symbol(b,p,s,e) BFD_SEND (b, _bfd_print_symbol, (b,p,s,e))
 350 .  void        (*_bfd_get_symbol_info)
 351 .    (bfd *, struct bfd_symbol *, symbol_info *);
 352 .#define bfd_get_symbol_info(b,p,e) BFD_SEND (b, _bfd_get_symbol_info, (b,p,e))
 353 .  bfd_boolean (*_bfd_is_local_label_name) (bfd *, const char *);
 354 .
 355 .  alent *     (*_get_lineno) (bfd *, struct bfd_symbol *);
 356 .  bfd_boolean (*_bfd_find_nearest_line)
 357 .    (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
 358 .     const char **, const char **, unsigned int *);
 359 . {* Back-door to allow format-aware applications to create debug symbols
 360 .    while using BFD for everything else.  Currently used by the assembler
 361 .    when creating COFF files.  *}
 362 .  asymbol *   (*_bfd_make_debug_symbol)
 363 .    (bfd *, void *, unsigned long size);
 364 .#define bfd_read_minisymbols(b, d, m, s) \
 365 .  BFD_SEND (b, _read_minisymbols, (b, d, m, s))
 366 .  long        (*_read_minisymbols)
 367 .    (bfd *, bfd_boolean, void **, unsigned int *);
 368 .#define bfd_minisymbol_to_symbol(b, d, m, f) \
 369 .  BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
 370 .  asymbol *   (*_minisymbol_to_symbol)
 371 .    (bfd *, bfd_boolean, const void *, asymbol *);
 372 .
 373 .  {* Routines for relocs.  *}
 374 .#define BFD_JUMP_TABLE_RELOCS(NAME) \
 375 .  NAME##_get_reloc_upper_bound, \
 376 .  NAME##_canonicalize_reloc, \
 377 .  NAME##_bfd_reloc_type_lookup
 378 .
 379 .  long        (*_get_reloc_upper_bound) (bfd *, sec_ptr);
 380 .  long        (*_bfd_canonicalize_reloc)
 381 .    (bfd *, sec_ptr, arelent **, struct bfd_symbol **);
 382 .  {* See documentation on reloc types.  *}
 383 .  reloc_howto_type *
 384 .              (*reloc_type_lookup) (bfd *, bfd_reloc_code_real_type);
 385 .
 386 .  {* Routines used when writing an object file.  *}
 387 .#define BFD_JUMP_TABLE_WRITE(NAME) \
 388 .  NAME##_set_arch_mach, \
 389 .  NAME##_set_section_contents
 390 .
 391 .  bfd_boolean (*_bfd_set_arch_mach)
 392 .    (bfd *, enum bfd_architecture, unsigned long);
 393 .  bfd_boolean (*_bfd_set_section_contents)
 394 .    (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
 395 .
 396 .  {* Routines used by the linker.  *}
 397 .#define BFD_JUMP_TABLE_LINK(NAME) \
 398 .  NAME##_sizeof_headers, \
 399 .  NAME##_bfd_get_relocated_section_contents, \
 400 .  NAME##_bfd_relax_section, \
 401 .  NAME##_bfd_link_hash_table_create, \
 402 .  NAME##_bfd_link_hash_table_free, \
 403 .  NAME##_bfd_link_add_symbols, \
 404 .  NAME##_bfd_link_just_syms, \
 405 .  NAME##_bfd_final_link, \
 406 .  NAME##_bfd_link_split_section, \
 407 .  NAME##_bfd_gc_sections, \
 408 .  NAME##_bfd_merge_sections, \
 409 .  NAME##_bfd_is_group_section, \
 410 .  NAME##_bfd_discard_group
 411 .
 412 .  int         (*_bfd_sizeof_headers) (bfd *, bfd_boolean);
 413 .  bfd_byte *  (*_bfd_get_relocated_section_contents)
 414 .    (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 415 .     bfd_byte *, bfd_boolean, struct bfd_symbol **);
 416 .
 417 .  bfd_boolean (*_bfd_relax_section)
 418 .    (bfd *, struct bfd_section *, struct bfd_link_info *, bfd_boolean *);
 419 .
 420 .  {* Create a hash table for the linker.  Different backends store
 421 .     different information in this table.  *}
 422 .  struct bfd_link_hash_table *
 423 .              (*_bfd_link_hash_table_create) (bfd *);
 424 .
 425 .  {* Release the memory associated with the linker hash table.  *}
 426 .  void        (*_bfd_link_hash_table_free) (struct bfd_link_hash_table *);
 427 .
 428 .  {* Add symbols from this object file into the hash table.  *}
 429 .  bfd_boolean (*_bfd_link_add_symbols) (bfd *, struct bfd_link_info *);
 430 .
 431 .  {* Indicate that we are only retrieving symbol values from this section.  *}
 432 .  void        (*_bfd_link_just_syms) (asection *, struct bfd_link_info *);
 433 .
 434 .  {* Do a link based on the link_order structures attached to each
 435 .     section of the BFD.  *}
 436 .  bfd_boolean (*_bfd_final_link) (bfd *, struct bfd_link_info *);
 437 .
 438 .  {* Should this section be split up into smaller pieces during linking.  *}
 439 .  bfd_boolean (*_bfd_link_split_section) (bfd *, struct bfd_section *);
 440 .
 441 .  {* Remove sections that are not referenced from the output.  *}
 442 .  bfd_boolean (*_bfd_gc_sections) (bfd *, struct bfd_link_info *);
 443 .
 444 .  {* Attempt to merge SEC_MERGE sections.  *}
 445 .  bfd_boolean (*_bfd_merge_sections) (bfd *, struct bfd_link_info *);
 446 .
 447 .  {* Is this section a member of a group?  *}
 448 .  bfd_boolean (*_bfd_is_group_section) (bfd *, const struct bfd_section *);
 449 .
 450 .  {* Discard members of a group.  *}
 451 .  bfd_boolean (*_bfd_discard_group) (bfd *, struct bfd_section *);
 452 .
 453 .  {* Routines to handle dynamic symbols and relocs.  *}
 454 .#define BFD_JUMP_TABLE_DYNAMIC(NAME) \
 455 .  NAME##_get_dynamic_symtab_upper_bound, \
 456 .  NAME##_canonicalize_dynamic_symtab, \
 457 .  NAME##_get_synthetic_symtab, \
 458 .  NAME##_get_dynamic_reloc_upper_bound, \
 459 .  NAME##_canonicalize_dynamic_reloc
 460 .
 461 .  {* Get the amount of memory required to hold the dynamic symbols.  *}
 462 .  long        (*_bfd_get_dynamic_symtab_upper_bound) (bfd *);
 463 .  {* Read in the dynamic symbols.  *}
 464 .  long        (*_bfd_canonicalize_dynamic_symtab)
 465 .    (bfd *, struct bfd_symbol **);
 466 .  {* Create synthetized symbols.  *}
 467 .  long        (*_bfd_get_synthetic_symtab)
 468 .    (bfd *, struct bfd_symbol **, struct bfd_symbol **);
 469 .  {* Get the amount of memory required to hold the dynamic relocs.  *}
 470 .  long        (*_bfd_get_dynamic_reloc_upper_bound) (bfd *);
 471 .  {* Read in the dynamic relocs.  *}
 472 .  long        (*_bfd_canonicalize_dynamic_reloc)
 473 .    (bfd *, arelent **, struct bfd_symbol **);
 474 .
 475
 476 A pointer to an alternative bfd_target in case the current one is not
 477 satisfactory.  This can happen when the target cpu supports both big
 478 and little endian code, and target chosen by the linker has the wrong
 479 endianness.  The function open_output() in ld/ldlang.c uses this field
 480 to find an alternative output format that is suitable.
 481
 482 .  {* Opposite endian version of this target.  *}
 483 .  const struct bfd_target * alternative_target;
 484 .
 485
 486 .  {* Data for use by back-end routines, which isn't
 487 .     generic enough to belong in this structure.  *}
 488 .  const void *backend_data;
 489 .
 490 .} bfd_target;
 491 .
 492 */
 493
 494 /* All known xvecs (even those that don't compile on all systems).
 495    Alphabetized for easy reference.
 496    They are listed a second time below, since
 497    we can't intermix extern's and initializers.  */
 498 extern const bfd_target a29kcoff_big_vec;
 499 extern const bfd_target a_out_adobe_vec;
 500 extern const bfd_target aix5coff64_vec;
 501 extern const bfd_target aout0_big_vec;
 502 extern const bfd_target aout_arm_big_vec;
 503 extern const bfd_target aout_arm_little_vec;
 504 extern const bfd_target aout_mips_big_vec;
 505 extern const bfd_target aout_mips_little_vec;
 506 extern const bfd_target apollocoff_vec;
 507 extern const bfd_target arm_epoc_pe_big_vec;
 508 extern const bfd_target arm_epoc_pe_little_vec;
 509 extern const bfd_target arm_epoc_pei_big_vec;
 510 extern const bfd_target arm_epoc_pei_little_vec;
 511 extern const bfd_target armcoff_big_vec;
 512 extern const bfd_target armcoff_little_vec;
 513 extern const bfd_target armnetbsd_vec;
 514 extern const bfd_target armpe_big_vec;
 515 extern const bfd_target armpe_little_vec;
 516 extern const bfd_target armpei_big_vec;
 517 extern const bfd_target armpei_little_vec;
 518 extern const bfd_target b_out_vec_big_host;
 519 extern const bfd_target b_out_vec_little_host;
 520 extern const bfd_target bfd_efi_app_ia32_vec;
 521 extern const bfd_target bfd_efi_app_ia64_vec;
 522 extern const bfd_target bfd_elf32_avr_vec;
 523 extern const bfd_target bfd_elf32_big_generic_vec;
 524 extern const bfd_target bfd_elf32_bigarc_vec;
 525 extern const bfd_target bfd_elf32_bigarm_oabi_vec;
 526 extern const bfd_target bfd_elf32_bigarm_vec;
 527 extern const bfd_target bfd_elf32_bigmips_vec;
 528 extern const bfd_target bfd_elf32_cr16c_vec;
 529 extern const bfd_target bfd_elf32_cris_vec;
 530 extern const bfd_target bfd_elf32_d10v_vec;
 531 extern const bfd_target bfd_elf32_d30v_vec;
 532 extern const bfd_target bfd_elf32_dlx_big_vec;
 533 extern const bfd_target bfd_elf32_fr30_vec;
 534 extern const bfd_target bfd_elf32_frv_vec;
 535 extern const bfd_target bfd_elf32_h8300_vec;
 536 extern const bfd_target bfd_elf32_hppa_linux_vec;
 537 extern const bfd_target bfd_elf32_hppa_vec;
 538 extern const bfd_target bfd_elf32_i370_vec;
 539 extern const bfd_target bfd_elf32_i386_freebsd_vec;
 540 extern const bfd_target bfd_elf32_i386_vec;
 541 extern const bfd_target bfd_elf32_i860_little_vec;
 542 extern const bfd_target bfd_elf32_i860_vec;
 543 extern const bfd_target bfd_elf32_i960_vec;
 544 extern const bfd_target bfd_elf32_ia64_big_vec;
 545 extern const bfd_target bfd_elf32_ia64_hpux_big_vec;
 546 extern const bfd_target bfd_elf32_ip2k_vec;
 547 extern const bfd_target bfd_elf32_iq2000_vec;
 548 extern const bfd_target bfd_elf32_little_generic_vec;
 549 extern const bfd_target bfd_elf32_littlearc_vec;
 550 extern const bfd_target bfd_elf32_littlearm_oabi_vec;
 551 extern const bfd_target bfd_elf32_littlearm_vec;
 552 extern const bfd_target bfd_elf32_littlemips_vec;
 553 extern const bfd_target bfd_elf32_m32r_vec;
 554 extern const bfd_target bfd_elf32_m32rle_vec;
 555 extern const bfd_target bfd_elf32_m32rlin_vec;
 556 extern const bfd_target bfd_elf32_m32rlelin_vec;
 557 extern const bfd_target bfd_elf32_m68hc11_vec;
 558 extern const bfd_target bfd_elf32_m68hc12_vec;
 559 extern const bfd_target bfd_elf32_m68k_vec;
 560 extern const bfd_target bfd_elf32_m88k_vec;
 561 extern const bfd_target bfd_elf32_mcore_big_vec;
 562 extern const bfd_target bfd_elf32_mcore_little_vec;
 563 extern const bfd_target bfd_elf32_mn10200_vec;
 564 extern const bfd_target bfd_elf32_mn10300_vec;
 565 extern const bfd_target bfd_elf32_msp430_vec;
 566 extern const bfd_target bfd_elf32_nbigmips_vec;
 567 extern const bfd_target bfd_elf32_nlittlemips_vec;
 568 extern const bfd_target bfd_elf32_ntradbigmips_vec;
 569 extern const bfd_target bfd_elf32_ntradlittlemips_vec;
 570 extern const bfd_target bfd_elf32_openrisc_vec;
 571 extern const bfd_target bfd_elf32_or32_big_vec;
 572 extern const bfd_target bfd_elf32_pj_vec;
 573 extern const bfd_target bfd_elf32_pjl_vec;
 574 extern const bfd_target bfd_elf32_powerpc_vec;
 575 extern const bfd_target bfd_elf32_powerpcle_vec;
 576 extern const bfd_target bfd_elf32_s390_vec;
 577 extern const bfd_target bfd_elf32_sh64_vec;
 578 extern const bfd_target bfd_elf32_sh64l_vec;
 579 extern const bfd_target bfd_elf32_sh64lin_vec;
 580 extern const bfd_target bfd_elf32_sh64blin_vec;
 581 extern const bfd_target bfd_elf32_sh64lnbsd_vec;
 582 extern const bfd_target bfd_elf32_sh64nbsd_vec;
 583 extern const bfd_target bfd_elf32_sh_vec;
 584 extern const bfd_target bfd_elf32_shblin_vec;
 585 extern const bfd_target bfd_elf32_shl_vec;
 586 extern const bfd_target bfd_elf32_shlin_vec;
 587 extern const bfd_target bfd_elf32_shlnbsd_vec;
 588 extern const bfd_target bfd_elf32_shnbsd_vec;
 589 extern const bfd_target bfd_elf32_sparc_vec;
 590 extern const bfd_target bfd_elf32_tradbigmips_vec;
 591 extern const bfd_target bfd_elf32_tradlittlemips_vec;
 592 extern const bfd_target bfd_elf32_us_cris_vec;
 593 extern const bfd_target bfd_elf32_v850_vec;
 594 extern const bfd_target bfd_elf32_vax_vec;
 595 extern const bfd_target bfd_elf32_xstormy16_vec;
 596 extern const bfd_target bfd_elf32_xtensa_be_vec;
 597 extern const bfd_target bfd_elf32_xtensa_le_vec;
 598 extern const bfd_target bfd_elf64_alpha_freebsd_vec;
 599 extern const bfd_target bfd_elf64_alpha_vec;
 600 extern const bfd_target bfd_elf64_big_generic_vec;
 601 extern const bfd_target bfd_elf64_bigmips_vec;
 602 extern const bfd_target bfd_elf64_hppa_linux_vec;
 603 extern const bfd_target bfd_elf64_hppa_vec;
 604 extern const bfd_target bfd_elf64_ia64_big_vec;
 605 extern const bfd_target bfd_elf64_ia64_hpux_big_vec;
 606 extern const bfd_target bfd_elf64_ia64_little_vec;
 607 extern const bfd_target bfd_elf64_little_generic_vec;
 608 extern const bfd_target bfd_elf64_littlemips_vec;
 609 extern const bfd_target bfd_elf64_mmix_vec;
 610 extern const bfd_target bfd_elf64_powerpc_vec;
 611 extern const bfd_target bfd_elf64_powerpcle_vec;
 612 extern const bfd_target bfd_elf64_s390_vec;
 613 extern const bfd_target bfd_elf64_sh64_vec;
 614 extern const bfd_target bfd_elf64_sh64l_vec;
 615 extern const bfd_target bfd_elf64_sh64lin_vec;
 616 extern const bfd_target bfd_elf64_sh64blin_vec;
 617 extern const bfd_target bfd_elf64_sh64lnbsd_vec;
 618 extern const bfd_target bfd_elf64_sh64nbsd_vec;
 619 extern const bfd_target bfd_elf64_sparc_vec;
 620 extern const bfd_target bfd_elf64_tradbigmips_vec;
 621 extern const bfd_target bfd_elf64_tradlittlemips_vec;
 622 extern const bfd_target bfd_elf64_x86_64_vec;
 623 extern const bfd_target bfd_mmo_vec;
 624 extern const bfd_target bfd_powerpc_pe_vec;
 625 extern const bfd_target bfd_powerpc_pei_vec;
 626 extern const bfd_target bfd_powerpcle_pe_vec;
 627 extern const bfd_target bfd_powerpcle_pei_vec;
 628 extern const bfd_target cris_aout_vec;
 629 extern const bfd_target demo_64_vec;
 630 extern const bfd_target ecoff_big_vec;
 631 extern const bfd_target ecoff_biglittle_vec;
 632 extern const bfd_target ecoff_little_vec;
 633 extern const bfd_target ecoffalpha_little_vec;
 634 extern const bfd_target go32coff_vec;
 635 extern const bfd_target go32stubbedcoff_vec;
 636 extern const bfd_target h8300coff_vec;
 637 extern const bfd_target h8500coff_vec;
 638 extern const bfd_target host_aout_vec;
 639 extern const bfd_target hp300bsd_vec;
 640 extern const bfd_target hp300hpux_vec;
 641 extern const bfd_target i386aout_vec;
 642 extern const bfd_target i386bsd_vec;
 643 extern const bfd_target i386coff_vec;
 644 extern const bfd_target i386dynix_vec;
 645 extern const bfd_target i386freebsd_vec;
 646 extern const bfd_target i386linux_vec;
 647 extern const bfd_target i386lynx_aout_vec;
 648 extern const bfd_target i386lynx_coff_vec;
 649 extern const bfd_target i386mach3_vec;
 650 extern const bfd_target i386msdos_vec;
 651 extern const bfd_target i386netbsd_vec;
 652 extern const bfd_target i386os9k_vec;
 653 extern const bfd_target i386pe_vec;
 654 extern const bfd_target i386pei_vec;
 655 extern const bfd_target i860coff_vec;
 656 extern const bfd_target icoff_big_vec;
 657 extern const bfd_target icoff_little_vec;
 658 extern const bfd_target ieee_vec;
 659 extern const bfd_target m68k4knetbsd_vec;
 660 extern const bfd_target m68kaux_coff_vec;
 661 extern const bfd_target m68kcoff_vec;
 662 extern const bfd_target m68kcoffun_vec;
 663 extern const bfd_target m68klinux_vec;
 664 extern const bfd_target m68klynx_aout_vec;
 665 extern const bfd_target m68klynx_coff_vec;
 666 extern const bfd_target m68knetbsd_vec;
 667 extern const bfd_target m68ksysvcoff_vec;
 668 extern const bfd_target m88kbcs_vec;
 669 extern const bfd_target m88kmach3_vec;
 670 extern const bfd_target mach_o_be_vec;
 671 extern const bfd_target mach_o_le_vec;
 672 extern const bfd_target mach_o_fat_vec;
 673 extern const bfd_target mcore_pe_big_vec;
 674 extern const bfd_target mcore_pe_little_vec;
 675 extern const bfd_target mcore_pei_big_vec;
 676 extern const bfd_target mcore_pei_little_vec;
 677 extern const bfd_target mipslpe_vec;
 678 extern const bfd_target mipslpei_vec;
 679 extern const bfd_target newsos3_vec;
 680 extern const bfd_target nlm32_alpha_vec;
 681 extern const bfd_target nlm32_i386_vec;
 682 extern const bfd_target nlm32_powerpc_vec;
 683 extern const bfd_target nlm32_sparc_vec;
 684 extern const bfd_target oasys_vec;
 685 extern const bfd_target or32coff_big_vec;
 686 extern const bfd_target pc532machaout_vec;
 687 extern const bfd_target pc532netbsd_vec;
 688 extern const bfd_target pdp11_aout_vec;
 689 extern const bfd_target pef_vec;
 690 extern const bfd_target pef_xlib_vec;
 691 extern const bfd_target pmac_xcoff_vec;
 692 extern const bfd_target ppcboot_vec;
 693 extern const bfd_target riscix_vec;
 694 extern const bfd_target rs6000coff64_vec;
 695 extern const bfd_target rs6000coff_vec;
 696 extern const bfd_target shcoff_small_vec;
 697 extern const bfd_target shcoff_vec;
 698 extern const bfd_target shlcoff_small_vec;
 699 extern const bfd_target shlcoff_vec;
 700 extern const bfd_target shlpe_vec;
 701 extern const bfd_target shlpei_vec;
 702 extern const bfd_target som_vec;
 703 extern const bfd_target sparccoff_vec;
 704 extern const bfd_target sparcle_aout_vec;
 705 extern const bfd_target sparclinux_vec;
 706 extern const bfd_target sparclynx_aout_vec;
 707 extern const bfd_target sparclynx_coff_vec;
 708 extern const bfd_target sparcnetbsd_vec;
 709 extern const bfd_target sunos_big_vec;
 710 extern const bfd_target sym_vec;
 711 extern const bfd_target tic30_aout_vec;
 712 extern const bfd_target tic30_coff_vec;
 713 extern const bfd_target tic4x_coff0_beh_vec;
 714 extern const bfd_target tic4x_coff0_vec;
 715 extern const bfd_target tic4x_coff1_beh_vec;
 716 extern const bfd_target tic4x_coff1_vec;
 717 extern const bfd_target tic4x_coff2_beh_vec;
 718 extern const bfd_target tic4x_coff2_vec;
 719 extern const bfd_target tic54x_coff0_beh_vec;
 720 extern const bfd_target tic54x_coff0_vec;
 721 extern const bfd_target tic54x_coff1_beh_vec;
 722 extern const bfd_target tic54x_coff1_vec;
 723 extern const bfd_target tic54x_coff2_beh_vec;
 724 extern const bfd_target tic54x_coff2_vec;
 725 extern const bfd_target tic80coff_vec;
 726 extern const bfd_target vaxbsd_vec;
 727 extern const bfd_target vaxnetbsd_vec;
 728 extern const bfd_target vax1knetbsd_vec;
 729 extern const bfd_target versados_vec;
 730 extern const bfd_target vms_alpha_vec;
 731 extern const bfd_target vms_vax_vec;
 732 extern const bfd_target w65_vec;
 733 extern const bfd_target we32kcoff_vec;
 734 extern const bfd_target z8kcoff_vec;
 735
 736 /* These are always included.  */
 737 extern const bfd_target srec_vec;
 738 extern const bfd_target symbolsrec_vec;
 739 extern const bfd_target tekhex_vec;
 740 extern const bfd_target binary_vec;
 741 extern const bfd_target ihex_vec;
 742
 743 /* All of the xvecs for core files.  */
 744 extern const bfd_target aix386_core_vec;
 745 extern const bfd_target cisco_core_big_vec;
 746 extern const bfd_target cisco_core_little_vec;
 747 extern const bfd_target hppabsd_core_vec;
 748 extern const bfd_target hpux_core_vec;
 749 extern const bfd_target irix_core_vec;
 750 extern const bfd_target netbsd_core_vec;
 751 extern const bfd_target osf_core_vec;
 752 extern const bfd_target ptrace_core_vec;
 753 extern const bfd_target sco5_core_vec;
 754 extern const bfd_target trad_core_vec;
 755
 756 extern const bfd_target bfd_elf32_am33lin_vec;
 757 static const bfd_target * const _bfd_target_vector[] = {
 758
 759 #ifdef SELECT_VECS
 760
 761         SELECT_VECS,
 762
 763 #else /* not SELECT_VECS */
 764
 765 #ifdef DEFAULT_VECTOR
 766         &DEFAULT_VECTOR,
 767 #endif
 768         /* This list is alphabetized to make it easy to compare
 769            with other vector lists -- the decls above and
 770            the case statement in configure.in.
 771            Vectors that don't compile on all systems, or aren't finished,
 772            should have an entry here with #if 0 around it, to show that
 773            it wasn't omitted by mistake.  */
 774         &a29kcoff_big_vec,
 775         &a_out_adobe_vec,
 776 #ifdef BFD64
 777         &aix5coff64_vec,
 778 #endif
 779         &aout0_big_vec,
 780 #if 0
 781         /* We have no way of distinguishing these from other a.out variants.  */
 782         &aout_arm_big_vec,
 783         &aout_arm_little_vec,
 784         /* No one seems to use this.  */
 785         &aout_mips_big_vec,
 786 #endif
 787         &aout_mips_little_vec,
 788 #if 0
 789         &apollocoff_vec,
 790 #endif
 791         &arm_epoc_pe_big_vec,
 792         &arm_epoc_pe_little_vec,
 793         &arm_epoc_pei_big_vec,
 794         &arm_epoc_pei_little_vec,
 795         &armcoff_big_vec,
 796         &armcoff_little_vec,
 797         &armnetbsd_vec,
 798         &armpe_big_vec,
 799         &armpe_little_vec,
 800         &armpei_big_vec,
 801         &armpei_little_vec,
 802         &b_out_vec_big_host,
 803         &b_out_vec_little_host,
 804         &bfd_efi_app_ia32_vec,
 805 #ifdef BFD64
 806         &bfd_efi_app_ia64_vec,
 807 #endif
 808         &bfd_elf32_avr_vec,
 809
 810         /* This, and other vectors, may not be used in any *.mt configuration.
 811            But that does not mean they are unnecessary.  If configured with
 812            --enable-targets=all, objdump or gdb should be able to examine
 813            the file even if we don't recognize the machine type.  */
 814         &bfd_elf32_big_generic_vec,
 815         &bfd_elf32_bigarc_vec,
 816         &bfd_elf32_bigarm_oabi_vec,
 817         &bfd_elf32_bigarm_vec,
 818         &bfd_elf32_bigmips_vec,
 819         &bfd_elf32_cr16c_vec,
 820         &bfd_elf32_cris_vec,
 821         &bfd_elf32_d10v_vec,
 822         &bfd_elf32_d30v_vec,
 823         &bfd_elf32_dlx_big_vec,
 824         &bfd_elf32_fr30_vec,
 825         &bfd_elf32_frv_vec,
 826         &bfd_elf32_h8300_vec,
 827         &bfd_elf32_hppa_linux_vec,
 828         &bfd_elf32_hppa_vec,
 829         &bfd_elf32_i370_vec,
 830         &bfd_elf32_i386_freebsd_vec,
 831         &bfd_elf32_i386_vec,
 832         &bfd_elf32_i860_little_vec,
 833         &bfd_elf32_i860_vec,
 834         &bfd_elf32_i960_vec,
 835 #if 0
 836         &bfd_elf32_ia64_big_vec,
 837 #endif
 838         &bfd_elf32_ia64_hpux_big_vec,
 839         &bfd_elf32_ip2k_vec,
 840         &bfd_elf32_iq2000_vec,
 841         &bfd_elf32_little_generic_vec,
 842         &bfd_elf32_littlearc_vec,
 843         &bfd_elf32_littlearm_oabi_vec,
 844         &bfd_elf32_littlearm_vec,
 845         &bfd_elf32_littlemips_vec,
 846         &bfd_elf32_m32r_vec,
 847         &bfd_elf32_m32rle_vec,
 848         &bfd_elf32_m32rlin_vec,
 849         &bfd_elf32_m32rlelin_vec,
 850         &bfd_elf32_m68hc11_vec,
 851         &bfd_elf32_m68hc12_vec,
 852         &bfd_elf32_m68k_vec,
 853         &bfd_elf32_m88k_vec,
 854         &bfd_elf32_mcore_big_vec,
 855         &bfd_elf32_mcore_little_vec,
 856         &bfd_elf32_mn10200_vec,
 857         &bfd_elf32_mn10300_vec,
 858         &bfd_elf32_msp430_vec,
 859 #ifdef BFD64
 860         &bfd_elf32_nbigmips_vec,
 861         &bfd_elf32_nlittlemips_vec,
 862         &bfd_elf32_ntradbigmips_vec,
 863         &bfd_elf32_ntradlittlemips_vec,
 864 #endif
 865         &bfd_elf32_openrisc_vec,
 866         &bfd_elf32_or32_big_vec,
 867         &bfd_elf32_pj_vec,
 868         &bfd_elf32_pjl_vec,
 869         &bfd_elf32_powerpc_vec,
 870         &bfd_elf32_powerpcle_vec,
 871         &bfd_elf32_s390_vec,
 872         &bfd_elf32_sh_vec,
 873         &bfd_elf32_shblin_vec,
 874         &bfd_elf32_shl_vec,
 875         &bfd_elf32_shlin_vec,
 876         &bfd_elf32_shlnbsd_vec,
 877         &bfd_elf32_shnbsd_vec,
 878 #ifdef BFD64
 879         &bfd_elf32_sh64_vec,
 880         &bfd_elf32_sh64l_vec,
 881         &bfd_elf32_sh64lnbsd_vec,
 882         &bfd_elf32_sh64nbsd_vec,
 883         &bfd_elf32_sh64lin_vec,
 884         &bfd_elf32_sh64blin_vec,
 885 #endif
 886         &bfd_elf32_sparc_vec,
 887         &bfd_elf32_tradbigmips_vec,
 888         &bfd_elf32_tradlittlemips_vec,
 889         &bfd_elf32_us_cris_vec,
 890         &bfd_elf32_v850_vec,
 891         &bfd_elf32_vax_vec,
 892         &bfd_elf32_xstormy16_vec,
 893         &bfd_elf32_xtensa_be_vec,
 894         &bfd_elf32_xtensa_le_vec,
 895 #ifdef BFD64
 896         &bfd_elf64_alpha_freebsd_vec,
 897         &bfd_elf64_alpha_vec,
 898         &bfd_elf64_big_generic_vec,
 899         &bfd_elf64_bigmips_vec,
 900         &bfd_elf64_hppa_linux_vec,
 901         &bfd_elf64_hppa_vec,
 902         &bfd_elf64_ia64_big_vec,
 903         &bfd_elf64_ia64_hpux_big_vec,
 904         &bfd_elf64_ia64_little_vec,
 905         &bfd_elf64_little_generic_vec,
 906         &bfd_elf64_littlemips_vec,
 907         &bfd_elf64_mmix_vec,
 908         &bfd_elf64_powerpc_vec,
 909         &bfd_elf64_powerpcle_vec,
 910         &bfd_elf64_s390_vec,
 911         &bfd_elf64_sh64_vec,
 912         &bfd_elf64_sh64l_vec,
 913         &bfd_elf64_sh64lnbsd_vec,
 914         &bfd_elf64_sh64nbsd_vec,
 915         &bfd_elf64_sh64lin_vec,
 916         &bfd_elf64_sh64blin_vec,
 917         &bfd_elf64_sparc_vec,
 918         &bfd_elf64_tradbigmips_vec,
 919         &bfd_elf64_tradlittlemips_vec,
 920         &bfd_elf64_x86_64_vec,
 921         &bfd_mmo_vec,
 922 #endif
 923         &bfd_powerpc_pe_vec,
 924         &bfd_powerpc_pei_vec,
 925         &bfd_powerpcle_pe_vec,
 926         &bfd_powerpcle_pei_vec,
 927         &cris_aout_vec,
 928 #ifdef BFD64
 929         &demo_64_vec,   /* Only compiled if host has long-long support.  */
 930 #endif
 931         &ecoff_big_vec,
 932         &ecoff_biglittle_vec,
 933         &ecoff_little_vec,
 934 #ifdef BFD64
 935         &ecoffalpha_little_vec,
 936 #endif
 937         &go32coff_vec,
 938         &go32stubbedcoff_vec,
 939         &h8300coff_vec,
 940         &h8500coff_vec,
 941 #if 0
 942         /* Since a.out files lack decent magic numbers, no way to recognize
 943            which kind of a.out file it is.  */
 944         &host_aout_vec,
 945         /* Clashes with sunos_big_vec magic no.  */
 946         &hp300bsd_vec,
 947 #endif
 948         &hp300hpux_vec,
 949         &i386aout_vec,
 950         &i386bsd_vec,
 951         &i386coff_vec,
 952 #if 0
 953         &i386dynix_vec,
 954 #endif
 955         &i386freebsd_vec,
 956 #if 0
 957         /* Since a.out files lack decent magic numbers, no way to recognize
 958            which kind of a.out file it is.  */
 959         &i386linux_vec,
 960 #endif
 961         &i386lynx_aout_vec,
 962         &i386lynx_coff_vec,
 963 #if 0
 964         /* No distinguishing features for Mach 3 executables.  */
 965         &i386mach3_vec,
 966 #endif
 967         &i386msdos_vec,
 968         &i386netbsd_vec,
 969         &i386os9k_vec,
 970         &i386pe_vec,
 971         &i386pei_vec,
 972         &i860coff_vec,
 973         &icoff_big_vec,
 974         &icoff_little_vec,
 975         &ieee_vec,
 976 #if 0
 977         &m68k4knetbsd_vec,
 978         &m68kaux_coff_vec,
 979 #endif
 980         &m68kcoff_vec,
 981         &m68kcoffun_vec,
 982 #if 0
 983         /* Since a.out files lack decent magic numbers, no way to recognize
 984            which kind of a.out file it is.  */
 985         &m68klinux_vec,
 986 #endif
 987         &m68klynx_aout_vec,
 988         &m68klynx_coff_vec,
 989         &m68knetbsd_vec,
 990         &m68ksysvcoff_vec,
 991         &m88kbcs_vec,
 992         &m88kmach3_vec,
 993         &mach_o_be_vec,
 994         &mach_o_le_vec,
 995         &mach_o_fat_vec,
 996         &mcore_pe_big_vec,
 997         &mcore_pe_little_vec,
 998         &mcore_pei_big_vec,
 999         &mcore_pei_little_vec,
1000         &mipslpe_vec,
1001         &mipslpei_vec,
1002         &newsos3_vec,
1003 #ifdef BFD64
1004         &nlm32_alpha_vec,
1005 #endif
1006         &nlm32_i386_vec,
1007         &nlm32_powerpc_vec,
1008         &nlm32_sparc_vec,
1009 #if 0
1010         /* We have no oasys tools anymore, so we can't test any of this
1011            anymore. If you want to test the stuff yourself, go ahead...
1012            steve@cygnus.com
1013            Worse, since there is no magic number for archives, there
1014            can be annoying target mis-matches.  */
1015         &oasys_vec,
1016 #endif
1017         /* Entry for the OpenRISC family.  */
1018         &or32coff_big_vec,
1019
1020         &pc532machaout_vec,
1021         &pc532netbsd_vec,
1022         &pdp11_aout_vec,
1023         &pef_vec,
1024         &pef_xlib_vec,
1025 #if 0
1026         /* This has the same magic number as RS/6000.  */
1027         &pmac_xcoff_vec,
1028 #endif
1029         &ppcboot_vec,
1030 #if 0
1031         /* We have no way of distinguishing these from other a.out variants.  */
1032         &riscix_vec,
1033 #endif
1034 #ifdef BFD64
1035         &rs6000coff64_vec,
1036 #endif
1037         &rs6000coff_vec,
1038         &shcoff_small_vec,
1039         &shcoff_vec,
1040         &shlcoff_small_vec,
1041         &shlcoff_vec,
1042         &shlpe_vec,
1043         &shlpei_vec,
1044 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
1045         &som_vec,
1046 #endif
1047         &sparccoff_vec,
1048         &sparcle_aout_vec,
1049         &sparclinux_vec,
1050         &sparclynx_aout_vec,
1051         &sparclynx_coff_vec,
1052         &sparcnetbsd_vec,
1053         &sunos_big_vec,
1054         &sym_vec,
1055         &tic30_aout_vec,
1056         &tic30_coff_vec,
1057         &tic54x_coff0_beh_vec,
1058         &tic54x_coff0_vec,
1059         &tic54x_coff1_beh_vec,
1060         &tic54x_coff1_vec,
1061         &tic54x_coff2_beh_vec,
1062         &tic54x_coff2_vec,
1063         &tic80coff_vec,
1064         &vaxbsd_vec,
1065         &vaxnetbsd_vec,
1066         &vax1knetbsd_vec,
1067         &versados_vec,
1068 #ifdef BFD64
1069         &vms_alpha_vec,
1070 #endif
1071         &vms_vax_vec,
1072         &w65_vec,
1073         &we32kcoff_vec,
1074         &z8kcoff_vec,
1075         &bfd_elf32_am33lin_vec,
1076 #endif /* not SELECT_VECS */
1077
1078 /* Always support S-records, for convenience.  */
1079         &srec_vec,
1080         &symbolsrec_vec,
1081 /* And tekhex */
1082         &tekhex_vec,
1083 /* Likewise for binary output.  */
1084         &binary_vec,
1085 /* Likewise for ihex.  */
1086         &ihex_vec,
1087
1088 /* Add any required traditional-core-file-handler.  */
1089
1090 #ifdef AIX386_CORE
1091         &aix386_core_vec,
1092 #endif
1093 #if 0
1094         /* We don't include cisco_core_*_vec.  Although it has a magic number,
1095            the magic number isn't at the beginning of the file, and thus
1096            might spuriously match other kinds of files.  */
1097         &cisco_core_big_vec,
1098         &cisco_core_little_vec,
1099 #endif
1100 #ifdef HPPABSD_CORE
1101         &hppabsd_core_vec,
1102 #endif
1103 #ifdef HPUX_CORE
1104         &hpux_core_vec,
1105 #endif
1106 #ifdef IRIX_CORE
1107         &irix_core_vec,
1108 #endif
1109 #ifdef NETBSD_CORE
1110         &netbsd_core_vec,
1111 #endif
1112 #ifdef OSF_CORE
1113         &osf_core_vec,
1114 #endif
1115 #ifdef PTRACE_CORE
1116         &ptrace_core_vec,
1117 #endif
1118 #ifdef SCO5_CORE
1119         &sco5_core_vec,
1120 #endif
1121 #ifdef TRAD_CORE
1122         &trad_core_vec,
1123 #endif
1124
1125         NULL /* end of list marker */
1126 };
1127 const bfd_target * const *bfd_target_vector = _bfd_target_vector;
1128
1129 /* bfd_default_vector[0] contains either the address of the default vector,
1130    if there is one, or zero if there isn't.  */
1131
1132 const bfd_target *bfd_default_vector[] = {
1133 #ifdef DEFAULT_VECTOR
1134         &DEFAULT_VECTOR,
1135 #endif
1136         NULL
1137 };
1138
1139 /* bfd_associated_vector[] contains the associated target vectors used
1140    to reduce the ambiguity in bfd_check_format_matches.  */
1141
1142 static const bfd_target *_bfd_associated_vector[] = {
1143 #ifdef ASSOCIATED_VECS
1144         ASSOCIATED_VECS,
1145 #endif
1146         NULL
1147 };
1148 const bfd_target * const *bfd_associated_vector = _bfd_associated_vector;
1149
1150 /* When there is an ambiguous match, bfd_check_format_matches puts the
1151    names of the matching targets in an array.  This variable is the maximum
1152    number of entries that the array could possibly need.  */
1153 const size_t _bfd_target_vector_entries = sizeof (_bfd_target_vector)/sizeof (*_bfd_target_vector);
1154 \f
1155 /* This array maps configuration triplets onto BFD vectors.  */
1156
1157 struct targmatch
1158 {
1159   /* The configuration triplet.  */
1160   const char *triplet;
1161   /* The BFD vector.  If this is NULL, then the vector is found by
1162      searching forward for the next structure with a non NULL vector
1163      field.  */
1164   const bfd_target *vector;
1165 };
1166
1167 /* targmatch.h is built by Makefile out of config.bfd.  */
1168 static const struct targmatch bfd_target_match[] = {
1169 #include "targmatch.h"
1170   { NULL, NULL }
1171 };
1172
1173 /* Find a target vector, given a name or configuration triplet.  */
1174
1175 static const bfd_target *
1176 find_target (const char *name)
1177 {
1178   const bfd_target * const *target;
1179   const struct targmatch *match;
1180
1181   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1182     if (strcmp (name, (*target)->name) == 0)
1183       return *target;
1184
1185   /* If we couldn't match on the exact name, try matching on the
1186      configuration triplet.  FIXME: We should run the triplet through
1187      config.sub first, but that is hard.  */
1188   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1189     {
1190       if (fnmatch (match->triplet, name, 0) == 0)
1191         {
1192           while (match->vector == NULL)
1193             ++match;
1194           return match->vector;
1195           break;
1196         }
1197     }
1198
1199   bfd_set_error (bfd_error_invalid_target);
1200   return NULL;
1201 }
1202
1203 /*
1204 FUNCTION
1205         bfd_set_default_target
1206
1207 SYNOPSIS
1208         bfd_boolean bfd_set_default_target (const char *name);
1209
1210 DESCRIPTION
1211         Set the default target vector to use when recognizing a BFD.
1212         This takes the name of the target, which may be a BFD target
1213         name or a configuration triplet.
1214 */
1215
1216 bfd_boolean
1217 bfd_set_default_target (const char *name)
1218 {
1219   const bfd_target *target;
1220
1221   if (bfd_default_vector[0] != NULL
1222       && strcmp (name, bfd_default_vector[0]->name) == 0)
1223     return TRUE;
1224
1225   target = find_target (name);
1226   if (target == NULL)
1227     return FALSE;
1228
1229   bfd_default_vector[0] = target;
1230   return TRUE;
1231 }
1232
1233 /*
1234 FUNCTION
1235         bfd_find_target
1236
1237 SYNOPSIS
1238         const bfd_target *bfd_find_target (const char *target_name, bfd *abfd);
1239
1240 DESCRIPTION
1241         Return a pointer to the transfer vector for the object target
1242         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
1243         one in the environment variable <<GNUTARGET>>; if that is null or not
1244         defined, then choose the first entry in the target list.
1245         Passing in the string "default" or setting the environment
1246         variable to "default" will cause the first entry in the target
1247         list to be returned, and "target_defaulted" will be set in the
1248         BFD.  This causes <<bfd_check_format>> to loop over all the
1249         targets to find the one that matches the file being read.
1250 */
1251
1252 const bfd_target *
1253 bfd_find_target (const char *target_name, bfd *abfd)
1254 {
1255   const char *targname;
1256   const bfd_target *target;
1257
1258   if (target_name != NULL)
1259     targname = target_name;
1260   else
1261     targname = getenv ("GNUTARGET");
1262
1263   /* This is safe; the vector cannot be null.  */
1264   if (targname == NULL || strcmp (targname, "default") == 0)
1265     {
1266       abfd->target_defaulted = TRUE;
1267       if (bfd_default_vector[0] != NULL)
1268         abfd->xvec = bfd_default_vector[0];
1269       else
1270         abfd->xvec = bfd_target_vector[0];
1271       return abfd->xvec;
1272     }
1273
1274   abfd->target_defaulted = FALSE;
1275
1276   target = find_target (targname);
1277   if (target == NULL)
1278     return NULL;
1279
1280   abfd->xvec = target;
1281   return target;
1282 }
1283
1284 /*
1285 FUNCTION
1286         bfd_target_list
1287
1288 SYNOPSIS
1289         const char ** bfd_target_list (void);
1290
1291 DESCRIPTION
1292         Return a freshly malloced NULL-terminated
1293         vector of the names of all the valid BFD targets. Do not
1294         modify the names.
1295
1296 */
1297
1298 const char **
1299 bfd_target_list (void)
1300 {
1301   int vec_length = 0;
1302   bfd_size_type amt;
1303 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1304   /* The native compiler on the HP9000/700 has a bug which causes it
1305      to loop endlessly when compiling this file.  This avoids it.  */
1306   volatile
1307 #endif
1308   const bfd_target * const *target;
1309   const  char **name_list, **name_ptr;
1310
1311   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1312     vec_length++;
1313
1314   amt = (vec_length + 1) * sizeof (char **);
1315   name_ptr = name_list = bfd_malloc (amt);
1316
1317   if (name_list == NULL)
1318     return NULL;
1319
1320   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1321     if (target == &bfd_target_vector[0]
1322         || *target != bfd_target_vector[0])
1323       *name_ptr++ = (*target)->name;
1324
1325   *name_ptr = NULL;
1326   return name_list;
1327 }
1328
1329 /*
1330 FUNCTION
1331         bfd_seach_for_target
1332
1333 SYNOPSIS
1334         const bfd_target *bfd_search_for_target
1335           (int (*search_func) (const bfd_target *, void *),
1336            void *);
1337
1338 DESCRIPTION
1339         Return a pointer to the first transfer vector in the list of
1340         transfer vectors maintained by BFD that produces a non-zero
1341         result when passed to the function @var{search_func}.  The
1342         parameter @var{data} is passed, unexamined, to the search
1343         function.
1344 */
1345
1346 const bfd_target *
1347 bfd_search_for_target (int (*search_func) (const bfd_target *, void *),
1348                        void *data)
1349 {
1350   const bfd_target * const *target;
1351
1352   for (target = bfd_target_vector; *target != NULL; target ++)
1353     if (search_func (*target, data))
1354       return *target;
1355
1356   return NULL;
1357 }