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_frvfdpic_vec;
 536 extern const bfd_target bfd_elf32_h8300_vec;
 537 extern const bfd_target bfd_elf32_hppa_linux_vec;
 538 extern const bfd_target bfd_elf32_hppa_vec;
 539 extern const bfd_target bfd_elf32_i370_vec;
 540 extern const bfd_target bfd_elf32_i386_freebsd_vec;
 541 extern const bfd_target bfd_elf32_i386_vec;
 542 extern const bfd_target bfd_elf32_i860_little_vec;
 543 extern const bfd_target bfd_elf32_i860_vec;
 544 extern const bfd_target bfd_elf32_i960_vec;
 545 extern const bfd_target bfd_elf32_ia64_big_vec;
 546 extern const bfd_target bfd_elf32_ia64_hpux_big_vec;
 547 extern const bfd_target bfd_elf32_ip2k_vec;
 548 extern const bfd_target bfd_elf32_iq2000_vec;
 549 extern const bfd_target bfd_elf32_little_generic_vec;
 550 extern const bfd_target bfd_elf32_littlearc_vec;
 551 extern const bfd_target bfd_elf32_littlearm_oabi_vec;
 552 extern const bfd_target bfd_elf32_littlearm_vec;
 553 extern const bfd_target bfd_elf32_littlemips_vec;
 554 extern const bfd_target bfd_elf32_m32r_vec;
 555 extern const bfd_target bfd_elf32_m32rle_vec;
 556 extern const bfd_target bfd_elf32_m32rlin_vec;
 557 extern const bfd_target bfd_elf32_m32rlelin_vec;
 558 extern const bfd_target bfd_elf32_m68hc11_vec;
 559 extern const bfd_target bfd_elf32_m68hc12_vec;
 560 extern const bfd_target bfd_elf32_m68k_vec;
 561 extern const bfd_target bfd_elf32_m88k_vec;
 562 extern const bfd_target bfd_elf32_mcore_big_vec;
 563 extern const bfd_target bfd_elf32_mcore_little_vec;
 564 extern const bfd_target bfd_elf32_mn10200_vec;
 565 extern const bfd_target bfd_elf32_mn10300_vec;
 566 extern const bfd_target bfd_elf32_msp430_vec;
 567 extern const bfd_target bfd_elf32_nbigmips_vec;
 568 extern const bfd_target bfd_elf32_nlittlemips_vec;
 569 extern const bfd_target bfd_elf32_ntradbigmips_vec;
 570 extern const bfd_target bfd_elf32_ntradlittlemips_vec;
 571 extern const bfd_target bfd_elf32_openrisc_vec;
 572 extern const bfd_target bfd_elf32_or32_big_vec;
 573 extern const bfd_target bfd_elf32_pj_vec;
 574 extern const bfd_target bfd_elf32_pjl_vec;
 575 extern const bfd_target bfd_elf32_powerpc_vec;
 576 extern const bfd_target bfd_elf32_powerpcle_vec;
 577 extern const bfd_target bfd_elf32_s390_vec;
 578 extern const bfd_target bfd_elf32_sh64_vec;
 579 extern const bfd_target bfd_elf32_sh64l_vec;
 580 extern const bfd_target bfd_elf32_sh64lin_vec;
 581 extern const bfd_target bfd_elf32_sh64blin_vec;
 582 extern const bfd_target bfd_elf32_sh64lnbsd_vec;
 583 extern const bfd_target bfd_elf32_sh64nbsd_vec;
 584 extern const bfd_target bfd_elf32_sh_vec;
 585 extern const bfd_target bfd_elf32_shblin_vec;
 586 extern const bfd_target bfd_elf32_shl_vec;
 587 extern const bfd_target bfd_elf32_shlin_vec;
 588 extern const bfd_target bfd_elf32_shlnbsd_vec;
 589 extern const bfd_target bfd_elf32_shnbsd_vec;
 590 extern const bfd_target bfd_elf32_sparc_vec;
 591 extern const bfd_target bfd_elf32_tradbigmips_vec;
 592 extern const bfd_target bfd_elf32_tradlittlemips_vec;
 593 extern const bfd_target bfd_elf32_us_cris_vec;
 594 extern const bfd_target bfd_elf32_v850_vec;
 595 extern const bfd_target bfd_elf32_vax_vec;
 596 extern const bfd_target bfd_elf32_xstormy16_vec;
 597 extern const bfd_target bfd_elf32_xtensa_be_vec;
 598 extern const bfd_target bfd_elf32_xtensa_le_vec;
 599 extern const bfd_target bfd_elf64_alpha_freebsd_vec;
 600 extern const bfd_target bfd_elf64_alpha_vec;
 601 extern const bfd_target bfd_elf64_big_generic_vec;
 602 extern const bfd_target bfd_elf64_bigmips_vec;
 603 extern const bfd_target bfd_elf64_hppa_linux_vec;
 604 extern const bfd_target bfd_elf64_hppa_vec;
 605 extern const bfd_target bfd_elf64_ia64_big_vec;
 606 extern const bfd_target bfd_elf64_ia64_hpux_big_vec;
 607 extern const bfd_target bfd_elf64_ia64_little_vec;
 608 extern const bfd_target bfd_elf64_little_generic_vec;
 609 extern const bfd_target bfd_elf64_littlemips_vec;
 610 extern const bfd_target bfd_elf64_mmix_vec;
 611 extern const bfd_target bfd_elf64_powerpc_vec;
 612 extern const bfd_target bfd_elf64_powerpcle_vec;
 613 extern const bfd_target bfd_elf64_s390_vec;
 614 extern const bfd_target bfd_elf64_sh64_vec;
 615 extern const bfd_target bfd_elf64_sh64l_vec;
 616 extern const bfd_target bfd_elf64_sh64lin_vec;
 617 extern const bfd_target bfd_elf64_sh64blin_vec;
 618 extern const bfd_target bfd_elf64_sh64lnbsd_vec;
 619 extern const bfd_target bfd_elf64_sh64nbsd_vec;
 620 extern const bfd_target bfd_elf64_sparc_vec;
 621 extern const bfd_target bfd_elf64_tradbigmips_vec;
 622 extern const bfd_target bfd_elf64_tradlittlemips_vec;
 623 extern const bfd_target bfd_elf64_x86_64_vec;
 624 extern const bfd_target bfd_mmo_vec;
 625 extern const bfd_target bfd_powerpc_pe_vec;
 626 extern const bfd_target bfd_powerpc_pei_vec;
 627 extern const bfd_target bfd_powerpcle_pe_vec;
 628 extern const bfd_target bfd_powerpcle_pei_vec;
 629 extern const bfd_target cris_aout_vec;
 630 extern const bfd_target demo_64_vec;
 631 extern const bfd_target ecoff_big_vec;
 632 extern const bfd_target ecoff_biglittle_vec;
 633 extern const bfd_target ecoff_little_vec;
 634 extern const bfd_target ecoffalpha_little_vec;
 635 extern const bfd_target go32coff_vec;
 636 extern const bfd_target go32stubbedcoff_vec;
 637 extern const bfd_target h8300coff_vec;
 638 extern const bfd_target h8500coff_vec;
 639 extern const bfd_target host_aout_vec;
 640 extern const bfd_target hp300bsd_vec;
 641 extern const bfd_target hp300hpux_vec;
 642 extern const bfd_target i386aout_vec;
 643 extern const bfd_target i386bsd_vec;
 644 extern const bfd_target i386coff_vec;
 645 extern const bfd_target i386dynix_vec;
 646 extern const bfd_target i386freebsd_vec;
 647 extern const bfd_target i386linux_vec;
 648 extern const bfd_target i386lynx_aout_vec;
 649 extern const bfd_target i386lynx_coff_vec;
 650 extern const bfd_target i386mach3_vec;
 651 extern const bfd_target i386msdos_vec;
 652 extern const bfd_target i386netbsd_vec;
 653 extern const bfd_target i386os9k_vec;
 654 extern const bfd_target i386pe_vec;
 655 extern const bfd_target i386pei_vec;
 656 extern const bfd_target i860coff_vec;
 657 extern const bfd_target icoff_big_vec;
 658 extern const bfd_target icoff_little_vec;
 659 extern const bfd_target ieee_vec;
 660 extern const bfd_target m68k4knetbsd_vec;
 661 extern const bfd_target m68kaux_coff_vec;
 662 extern const bfd_target m68kcoff_vec;
 663 extern const bfd_target m68kcoffun_vec;
 664 extern const bfd_target m68klinux_vec;
 665 extern const bfd_target m68klynx_aout_vec;
 666 extern const bfd_target m68klynx_coff_vec;
 667 extern const bfd_target m68knetbsd_vec;
 668 extern const bfd_target m68ksysvcoff_vec;
 669 extern const bfd_target m88kbcs_vec;
 670 extern const bfd_target m88kmach3_vec;
 671 extern const bfd_target mach_o_be_vec;
 672 extern const bfd_target mach_o_le_vec;
 673 extern const bfd_target mach_o_fat_vec;
 674 extern const bfd_target mcore_pe_big_vec;
 675 extern const bfd_target mcore_pe_little_vec;
 676 extern const bfd_target mcore_pei_big_vec;
 677 extern const bfd_target mcore_pei_little_vec;
 678 extern const bfd_target mipslpe_vec;
 679 extern const bfd_target mipslpei_vec;
 680 extern const bfd_target newsos3_vec;
 681 extern const bfd_target nlm32_alpha_vec;
 682 extern const bfd_target nlm32_i386_vec;
 683 extern const bfd_target nlm32_powerpc_vec;
 684 extern const bfd_target nlm32_sparc_vec;
 685 extern const bfd_target oasys_vec;
 686 extern const bfd_target or32coff_big_vec;
 687 extern const bfd_target pc532machaout_vec;
 688 extern const bfd_target pc532netbsd_vec;
 689 extern const bfd_target pdp11_aout_vec;
 690 extern const bfd_target pef_vec;
 691 extern const bfd_target pef_xlib_vec;
 692 extern const bfd_target pmac_xcoff_vec;
 693 extern const bfd_target ppcboot_vec;
 694 extern const bfd_target riscix_vec;
 695 extern const bfd_target rs6000coff64_vec;
 696 extern const bfd_target rs6000coff_vec;
 697 extern const bfd_target shcoff_small_vec;
 698 extern const bfd_target shcoff_vec;
 699 extern const bfd_target shlcoff_small_vec;
 700 extern const bfd_target shlcoff_vec;
 701 extern const bfd_target shlpe_vec;
 702 extern const bfd_target shlpei_vec;
 703 extern const bfd_target som_vec;
 704 extern const bfd_target sparccoff_vec;
 705 extern const bfd_target sparcle_aout_vec;
 706 extern const bfd_target sparclinux_vec;
 707 extern const bfd_target sparclynx_aout_vec;
 708 extern const bfd_target sparclynx_coff_vec;
 709 extern const bfd_target sparcnetbsd_vec;
 710 extern const bfd_target sunos_big_vec;
 711 extern const bfd_target sym_vec;
 712 extern const bfd_target tic30_aout_vec;
 713 extern const bfd_target tic30_coff_vec;
 714 extern const bfd_target tic4x_coff0_beh_vec;
 715 extern const bfd_target tic4x_coff0_vec;
 716 extern const bfd_target tic4x_coff1_beh_vec;
 717 extern const bfd_target tic4x_coff1_vec;
 718 extern const bfd_target tic4x_coff2_beh_vec;
 719 extern const bfd_target tic4x_coff2_vec;
 720 extern const bfd_target tic54x_coff0_beh_vec;
 721 extern const bfd_target tic54x_coff0_vec;
 722 extern const bfd_target tic54x_coff1_beh_vec;
 723 extern const bfd_target tic54x_coff1_vec;
 724 extern const bfd_target tic54x_coff2_beh_vec;
 725 extern const bfd_target tic54x_coff2_vec;
 726 extern const bfd_target tic80coff_vec;
 727 extern const bfd_target vaxbsd_vec;
 728 extern const bfd_target vaxnetbsd_vec;
 729 extern const bfd_target vax1knetbsd_vec;
 730 extern const bfd_target versados_vec;
 731 extern const bfd_target vms_alpha_vec;
 732 extern const bfd_target vms_vax_vec;
 733 extern const bfd_target w65_vec;
 734 extern const bfd_target we32kcoff_vec;
 735 extern const bfd_target z8kcoff_vec;
 736
 737 /* These are always included.  */
 738 extern const bfd_target srec_vec;
 739 extern const bfd_target symbolsrec_vec;
 740 extern const bfd_target tekhex_vec;
 741 extern const bfd_target binary_vec;
 742 extern const bfd_target ihex_vec;
 743
 744 /* All of the xvecs for core files.  */
 745 extern const bfd_target aix386_core_vec;
 746 extern const bfd_target cisco_core_big_vec;
 747 extern const bfd_target cisco_core_little_vec;
 748 extern const bfd_target hppabsd_core_vec;
 749 extern const bfd_target hpux_core_vec;
 750 extern const bfd_target irix_core_vec;
 751 extern const bfd_target netbsd_core_vec;
 752 extern const bfd_target osf_core_vec;
 753 extern const bfd_target ptrace_core_vec;
 754 extern const bfd_target sco5_core_vec;
 755 extern const bfd_target trad_core_vec;
 756
 757 extern const bfd_target bfd_elf32_am33lin_vec;
 758 static const bfd_target * const _bfd_target_vector[] = {
 759
 760 #ifdef SELECT_VECS
 761
 762         SELECT_VECS,
 763
 764 #else /* not SELECT_VECS */
 765
 766 #ifdef DEFAULT_VECTOR
 767         &DEFAULT_VECTOR,
 768 #endif
 769         /* This list is alphabetized to make it easy to compare
 770            with other vector lists -- the decls above and
 771            the case statement in configure.in.
 772            Vectors that don't compile on all systems, or aren't finished,
 773            should have an entry here with #if 0 around it, to show that
 774            it wasn't omitted by mistake.  */
 775         &a29kcoff_big_vec,
 776         &a_out_adobe_vec,
 777 #ifdef BFD64
 778         &aix5coff64_vec,
 779 #endif
 780         &aout0_big_vec,
 781 #if 0
 782         /* We have no way of distinguishing these from other a.out variants.  */
 783         &aout_arm_big_vec,
 784         &aout_arm_little_vec,
 785         /* No one seems to use this.  */
 786         &aout_mips_big_vec,
 787 #endif
 788         &aout_mips_little_vec,
 789 #if 0
 790         &apollocoff_vec,
 791 #endif
 792         &arm_epoc_pe_big_vec,
 793         &arm_epoc_pe_little_vec,
 794         &arm_epoc_pei_big_vec,
 795         &arm_epoc_pei_little_vec,
 796         &armcoff_big_vec,
 797         &armcoff_little_vec,
 798         &armnetbsd_vec,
 799         &armpe_big_vec,
 800         &armpe_little_vec,
 801         &armpei_big_vec,
 802         &armpei_little_vec,
 803         &b_out_vec_big_host,
 804         &b_out_vec_little_host,
 805         &bfd_efi_app_ia32_vec,
 806 #ifdef BFD64
 807         &bfd_efi_app_ia64_vec,
 808 #endif
 809         &bfd_elf32_avr_vec,
 810
 811         /* This, and other vectors, may not be used in any *.mt configuration.
 812            But that does not mean they are unnecessary.  If configured with
 813            --enable-targets=all, objdump or gdb should be able to examine
 814            the file even if we don't recognize the machine type.  */
 815         &bfd_elf32_big_generic_vec,
 816         &bfd_elf32_bigarc_vec,
 817         &bfd_elf32_bigarm_oabi_vec,
 818         &bfd_elf32_bigarm_vec,
 819         &bfd_elf32_bigmips_vec,
 820         &bfd_elf32_cr16c_vec,
 821         &bfd_elf32_cris_vec,
 822         &bfd_elf32_d10v_vec,
 823         &bfd_elf32_d30v_vec,
 824         &bfd_elf32_dlx_big_vec,
 825         &bfd_elf32_fr30_vec,
 826         &bfd_elf32_frv_vec,
 827         &bfd_elf32_frvfdpic_vec,
 828         &bfd_elf32_h8300_vec,
 829         &bfd_elf32_hppa_linux_vec,
 830         &bfd_elf32_hppa_vec,
 831         &bfd_elf32_i370_vec,
 832         &bfd_elf32_i386_freebsd_vec,
 833         &bfd_elf32_i386_vec,
 834         &bfd_elf32_i860_little_vec,
 835         &bfd_elf32_i860_vec,
 836         &bfd_elf32_i960_vec,
 837 #if 0
 838         &bfd_elf32_ia64_big_vec,
 839 #endif
 840         &bfd_elf32_ia64_hpux_big_vec,
 841         &bfd_elf32_ip2k_vec,
 842         &bfd_elf32_iq2000_vec,
 843         &bfd_elf32_little_generic_vec,
 844         &bfd_elf32_littlearc_vec,
 845         &bfd_elf32_littlearm_oabi_vec,
 846         &bfd_elf32_littlearm_vec,
 847         &bfd_elf32_littlemips_vec,
 848         &bfd_elf32_m32r_vec,
 849         &bfd_elf32_m32rle_vec,
 850         &bfd_elf32_m32rlin_vec,
 851         &bfd_elf32_m32rlelin_vec,
 852         &bfd_elf32_m68hc11_vec,
 853         &bfd_elf32_m68hc12_vec,
 854         &bfd_elf32_m68k_vec,
 855         &bfd_elf32_m88k_vec,
 856         &bfd_elf32_mcore_big_vec,
 857         &bfd_elf32_mcore_little_vec,
 858         &bfd_elf32_mn10200_vec,
 859         &bfd_elf32_mn10300_vec,
 860         &bfd_elf32_msp430_vec,
 861 #ifdef BFD64
 862         &bfd_elf32_nbigmips_vec,
 863         &bfd_elf32_nlittlemips_vec,
 864         &bfd_elf32_ntradbigmips_vec,
 865         &bfd_elf32_ntradlittlemips_vec,
 866 #endif
 867         &bfd_elf32_openrisc_vec,
 868         &bfd_elf32_or32_big_vec,
 869         &bfd_elf32_pj_vec,
 870         &bfd_elf32_pjl_vec,
 871         &bfd_elf32_powerpc_vec,
 872         &bfd_elf32_powerpcle_vec,
 873         &bfd_elf32_s390_vec,
 874         &bfd_elf32_sh_vec,
 875         &bfd_elf32_shblin_vec,
 876         &bfd_elf32_shl_vec,
 877         &bfd_elf32_shlin_vec,
 878         &bfd_elf32_shlnbsd_vec,
 879         &bfd_elf32_shnbsd_vec,
 880 #ifdef BFD64
 881         &bfd_elf32_sh64_vec,
 882         &bfd_elf32_sh64l_vec,
 883         &bfd_elf32_sh64lnbsd_vec,
 884         &bfd_elf32_sh64nbsd_vec,
 885         &bfd_elf32_sh64lin_vec,
 886         &bfd_elf32_sh64blin_vec,
 887 #endif
 888         &bfd_elf32_sparc_vec,
 889         &bfd_elf32_tradbigmips_vec,
 890         &bfd_elf32_tradlittlemips_vec,
 891         &bfd_elf32_us_cris_vec,
 892         &bfd_elf32_v850_vec,
 893         &bfd_elf32_vax_vec,
 894         &bfd_elf32_xstormy16_vec,
 895         &bfd_elf32_xtensa_be_vec,
 896         &bfd_elf32_xtensa_le_vec,
 897 #ifdef BFD64
 898         &bfd_elf64_alpha_freebsd_vec,
 899         &bfd_elf64_alpha_vec,
 900         &bfd_elf64_big_generic_vec,
 901         &bfd_elf64_bigmips_vec,
 902         &bfd_elf64_hppa_linux_vec,
 903         &bfd_elf64_hppa_vec,
 904         &bfd_elf64_ia64_big_vec,
 905         &bfd_elf64_ia64_hpux_big_vec,
 906         &bfd_elf64_ia64_little_vec,
 907         &bfd_elf64_little_generic_vec,
 908         &bfd_elf64_littlemips_vec,
 909         &bfd_elf64_mmix_vec,
 910         &bfd_elf64_powerpc_vec,
 911         &bfd_elf64_powerpcle_vec,
 912         &bfd_elf64_s390_vec,
 913         &bfd_elf64_sh64_vec,
 914         &bfd_elf64_sh64l_vec,
 915         &bfd_elf64_sh64lnbsd_vec,
 916         &bfd_elf64_sh64nbsd_vec,
 917         &bfd_elf64_sh64lin_vec,
 918         &bfd_elf64_sh64blin_vec,
 919         &bfd_elf64_sparc_vec,
 920         &bfd_elf64_tradbigmips_vec,
 921         &bfd_elf64_tradlittlemips_vec,
 922         &bfd_elf64_x86_64_vec,
 923         &bfd_mmo_vec,
 924 #endif
 925         &bfd_powerpc_pe_vec,
 926         &bfd_powerpc_pei_vec,
 927         &bfd_powerpcle_pe_vec,
 928         &bfd_powerpcle_pei_vec,
 929         &cris_aout_vec,
 930 #ifdef BFD64
 931         &demo_64_vec,   /* Only compiled if host has long-long support.  */
 932 #endif
 933         &ecoff_big_vec,
 934         &ecoff_biglittle_vec,
 935         &ecoff_little_vec,
 936 #ifdef BFD64
 937         &ecoffalpha_little_vec,
 938 #endif
 939         &go32coff_vec,
 940         &go32stubbedcoff_vec,
 941         &h8300coff_vec,
 942         &h8500coff_vec,
 943 #if 0
 944         /* Since a.out files lack decent magic numbers, no way to recognize
 945            which kind of a.out file it is.  */
 946         &host_aout_vec,
 947         /* Clashes with sunos_big_vec magic no.  */
 948         &hp300bsd_vec,
 949 #endif
 950         &hp300hpux_vec,
 951         &i386aout_vec,
 952         &i386bsd_vec,
 953         &i386coff_vec,
 954 #if 0
 955         &i386dynix_vec,
 956 #endif
 957         &i386freebsd_vec,
 958 #if 0
 959         /* Since a.out files lack decent magic numbers, no way to recognize
 960            which kind of a.out file it is.  */
 961         &i386linux_vec,
 962 #endif
 963         &i386lynx_aout_vec,
 964         &i386lynx_coff_vec,
 965 #if 0
 966         /* No distinguishing features for Mach 3 executables.  */
 967         &i386mach3_vec,
 968 #endif
 969         &i386msdos_vec,
 970         &i386netbsd_vec,
 971         &i386os9k_vec,
 972         &i386pe_vec,
 973         &i386pei_vec,
 974         &i860coff_vec,
 975         &icoff_big_vec,
 976         &icoff_little_vec,
 977         &ieee_vec,
 978 #if 0
 979         &m68k4knetbsd_vec,
 980         &m68kaux_coff_vec,
 981 #endif
 982         &m68kcoff_vec,
 983         &m68kcoffun_vec,
 984 #if 0
 985         /* Since a.out files lack decent magic numbers, no way to recognize
 986            which kind of a.out file it is.  */
 987         &m68klinux_vec,
 988 #endif
 989         &m68klynx_aout_vec,
 990         &m68klynx_coff_vec,
 991         &m68knetbsd_vec,
 992         &m68ksysvcoff_vec,
 993         &m88kbcs_vec,
 994         &m88kmach3_vec,
 995         &mach_o_be_vec,
 996         &mach_o_le_vec,
 997         &mach_o_fat_vec,
 998         &mcore_pe_big_vec,
 999         &mcore_pe_little_vec,
1000         &mcore_pei_big_vec,
1001         &mcore_pei_little_vec,
1002         &mipslpe_vec,
1003         &mipslpei_vec,
1004         &newsos3_vec,
1005 #ifdef BFD64
1006         &nlm32_alpha_vec,
1007 #endif
1008         &nlm32_i386_vec,
1009         &nlm32_powerpc_vec,
1010         &nlm32_sparc_vec,
1011 #if 0
1012         /* We have no oasys tools anymore, so we can't test any of this
1013            anymore. If you want to test the stuff yourself, go ahead...
1014            steve@cygnus.com
1015            Worse, since there is no magic number for archives, there
1016            can be annoying target mis-matches.  */
1017         &oasys_vec,
1018 #endif
1019         /* Entry for the OpenRISC family.  */
1020         &or32coff_big_vec,
1021
1022         &pc532machaout_vec,
1023         &pc532netbsd_vec,
1024         &pdp11_aout_vec,
1025         &pef_vec,
1026         &pef_xlib_vec,
1027 #if 0
1028         /* This has the same magic number as RS/6000.  */
1029         &pmac_xcoff_vec,
1030 #endif
1031         &ppcboot_vec,
1032 #if 0
1033         /* We have no way of distinguishing these from other a.out variants.  */
1034         &riscix_vec,
1035 #endif
1036 #ifdef BFD64
1037         &rs6000coff64_vec,
1038 #endif
1039         &rs6000coff_vec,
1040         &shcoff_small_vec,
1041         &shcoff_vec,
1042         &shlcoff_small_vec,
1043         &shlcoff_vec,
1044         &shlpe_vec,
1045         &shlpei_vec,
1046 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
1047         &som_vec,
1048 #endif
1049         &sparccoff_vec,
1050         &sparcle_aout_vec,
1051         &sparclinux_vec,
1052         &sparclynx_aout_vec,
1053         &sparclynx_coff_vec,
1054         &sparcnetbsd_vec,
1055         &sunos_big_vec,
1056         &sym_vec,
1057         &tic30_aout_vec,
1058         &tic30_coff_vec,
1059         &tic54x_coff0_beh_vec,
1060         &tic54x_coff0_vec,
1061         &tic54x_coff1_beh_vec,
1062         &tic54x_coff1_vec,
1063         &tic54x_coff2_beh_vec,
1064         &tic54x_coff2_vec,
1065         &tic80coff_vec,
1066         &vaxbsd_vec,
1067         &vaxnetbsd_vec,
1068         &vax1knetbsd_vec,
1069         &versados_vec,
1070 #ifdef BFD64
1071         &vms_alpha_vec,
1072 #endif
1073         &vms_vax_vec,
1074         &w65_vec,
1075         &we32kcoff_vec,
1076         &z8kcoff_vec,
1077         &bfd_elf32_am33lin_vec,
1078 #endif /* not SELECT_VECS */
1079
1080 /* Always support S-records, for convenience.  */
1081         &srec_vec,
1082         &symbolsrec_vec,
1083 /* And tekhex */
1084         &tekhex_vec,
1085 /* Likewise for binary output.  */
1086         &binary_vec,
1087 /* Likewise for ihex.  */
1088         &ihex_vec,
1089
1090 /* Add any required traditional-core-file-handler.  */
1091
1092 #ifdef AIX386_CORE
1093         &aix386_core_vec,
1094 #endif
1095 #if 0
1096         /* We don't include cisco_core_*_vec.  Although it has a magic number,
1097            the magic number isn't at the beginning of the file, and thus
1098            might spuriously match other kinds of files.  */
1099         &cisco_core_big_vec,
1100         &cisco_core_little_vec,
1101 #endif
1102 #ifdef HPPABSD_CORE
1103         &hppabsd_core_vec,
1104 #endif
1105 #ifdef HPUX_CORE
1106         &hpux_core_vec,
1107 #endif
1108 #ifdef IRIX_CORE
1109         &irix_core_vec,
1110 #endif
1111 #ifdef NETBSD_CORE
1112         &netbsd_core_vec,
1113 #endif
1114 #ifdef OSF_CORE
1115         &osf_core_vec,
1116 #endif
1117 #ifdef PTRACE_CORE
1118         &ptrace_core_vec,
1119 #endif
1120 #ifdef SCO5_CORE
1121         &sco5_core_vec,
1122 #endif
1123 #ifdef TRAD_CORE
1124         &trad_core_vec,
1125 #endif
1126
1127         NULL /* end of list marker */
1128 };
1129 const bfd_target * const *bfd_target_vector = _bfd_target_vector;
1130
1131 /* bfd_default_vector[0] contains either the address of the default vector,
1132    if there is one, or zero if there isn't.  */
1133
1134 const bfd_target *bfd_default_vector[] = {
1135 #ifdef DEFAULT_VECTOR
1136         &DEFAULT_VECTOR,
1137 #endif
1138         NULL
1139 };
1140
1141 /* bfd_associated_vector[] contains the associated target vectors used
1142    to reduce the ambiguity in bfd_check_format_matches.  */
1143
1144 static const bfd_target *_bfd_associated_vector[] = {
1145 #ifdef ASSOCIATED_VECS
1146         ASSOCIATED_VECS,
1147 #endif
1148         NULL
1149 };
1150 const bfd_target * const *bfd_associated_vector = _bfd_associated_vector;
1151
1152 /* When there is an ambiguous match, bfd_check_format_matches puts the
1153    names of the matching targets in an array.  This variable is the maximum
1154    number of entries that the array could possibly need.  */
1155 const size_t _bfd_target_vector_entries = sizeof (_bfd_target_vector)/sizeof (*_bfd_target_vector);
1156 \f
1157 /* This array maps configuration triplets onto BFD vectors.  */
1158
1159 struct targmatch
1160 {
1161   /* The configuration triplet.  */
1162   const char *triplet;
1163   /* The BFD vector.  If this is NULL, then the vector is found by
1164      searching forward for the next structure with a non NULL vector
1165      field.  */
1166   const bfd_target *vector;
1167 };
1168
1169 /* targmatch.h is built by Makefile out of config.bfd.  */
1170 static const struct targmatch bfd_target_match[] = {
1171 #include "targmatch.h"
1172   { NULL, NULL }
1173 };
1174
1175 /* Find a target vector, given a name or configuration triplet.  */
1176
1177 static const bfd_target *
1178 find_target (const char *name)
1179 {
1180   const bfd_target * const *target;
1181   const struct targmatch *match;
1182
1183   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1184     if (strcmp (name, (*target)->name) == 0)
1185       return *target;
1186
1187   /* If we couldn't match on the exact name, try matching on the
1188      configuration triplet.  FIXME: We should run the triplet through
1189      config.sub first, but that is hard.  */
1190   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1191     {
1192       if (fnmatch (match->triplet, name, 0) == 0)
1193         {
1194           while (match->vector == NULL)
1195             ++match;
1196           return match->vector;
1197           break;
1198         }
1199     }
1200
1201   bfd_set_error (bfd_error_invalid_target);
1202   return NULL;
1203 }
1204
1205 /*
1206 FUNCTION
1207         bfd_set_default_target
1208
1209 SYNOPSIS
1210         bfd_boolean bfd_set_default_target (const char *name);
1211
1212 DESCRIPTION
1213         Set the default target vector to use when recognizing a BFD.
1214         This takes the name of the target, which may be a BFD target
1215         name or a configuration triplet.
1216 */
1217
1218 bfd_boolean
1219 bfd_set_default_target (const char *name)
1220 {
1221   const bfd_target *target;
1222
1223   if (bfd_default_vector[0] != NULL
1224       && strcmp (name, bfd_default_vector[0]->name) == 0)
1225     return TRUE;
1226
1227   target = find_target (name);
1228   if (target == NULL)
1229     return FALSE;
1230
1231   bfd_default_vector[0] = target;
1232   return TRUE;
1233 }
1234
1235 /*
1236 FUNCTION
1237         bfd_find_target
1238
1239 SYNOPSIS
1240         const bfd_target *bfd_find_target (const char *target_name, bfd *abfd);
1241
1242 DESCRIPTION
1243         Return a pointer to the transfer vector for the object target
1244         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
1245         one in the environment variable <<GNUTARGET>>; if that is null or not
1246         defined, then choose the first entry in the target list.
1247         Passing in the string "default" or setting the environment
1248         variable to "default" will cause the first entry in the target
1249         list to be returned, and "target_defaulted" will be set in the
1250         BFD.  This causes <<bfd_check_format>> to loop over all the
1251         targets to find the one that matches the file being read.
1252 */
1253
1254 const bfd_target *
1255 bfd_find_target (const char *target_name, bfd *abfd)
1256 {
1257   const char *targname;
1258   const bfd_target *target;
1259
1260   if (target_name != NULL)
1261     targname = target_name;
1262   else
1263     targname = getenv ("GNUTARGET");
1264
1265   /* This is safe; the vector cannot be null.  */
1266   if (targname == NULL || strcmp (targname, "default") == 0)
1267     {
1268       abfd->target_defaulted = TRUE;
1269       if (bfd_default_vector[0] != NULL)
1270         abfd->xvec = bfd_default_vector[0];
1271       else
1272         abfd->xvec = bfd_target_vector[0];
1273       return abfd->xvec;
1274     }
1275
1276   abfd->target_defaulted = FALSE;
1277
1278   target = find_target (targname);
1279   if (target == NULL)
1280     return NULL;
1281
1282   abfd->xvec = target;
1283   return target;
1284 }
1285
1286 /*
1287 FUNCTION
1288         bfd_target_list
1289
1290 SYNOPSIS
1291         const char ** bfd_target_list (void);
1292
1293 DESCRIPTION
1294         Return a freshly malloced NULL-terminated
1295         vector of the names of all the valid BFD targets. Do not
1296         modify the names.
1297
1298 */
1299
1300 const char **
1301 bfd_target_list (void)
1302 {
1303   int vec_length = 0;
1304   bfd_size_type amt;
1305 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1306   /* The native compiler on the HP9000/700 has a bug which causes it
1307      to loop endlessly when compiling this file.  This avoids it.  */
1308   volatile
1309 #endif
1310   const bfd_target * const *target;
1311   const  char **name_list, **name_ptr;
1312
1313   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1314     vec_length++;
1315
1316   amt = (vec_length + 1) * sizeof (char **);
1317   name_ptr = name_list = bfd_malloc (amt);
1318
1319   if (name_list == NULL)
1320     return NULL;
1321
1322   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1323     if (target == &bfd_target_vector[0]
1324         || *target != bfd_target_vector[0])
1325       *name_ptr++ = (*target)->name;
1326
1327   *name_ptr = NULL;
1328   return name_list;
1329 }
1330
1331 /*
1332 FUNCTION
1333         bfd_seach_for_target
1334
1335 SYNOPSIS
1336         const bfd_target *bfd_search_for_target
1337           (int (*search_func) (const bfd_target *, void *),
1338            void *);
1339
1340 DESCRIPTION
1341         Return a pointer to the first transfer vector in the list of
1342         transfer vectors maintained by BFD that produces a non-zero
1343         result when passed to the function @var{search_func}.  The
1344         parameter @var{data} is passed, unexamined, to the search
1345         function.
1346 */
1347
1348 const bfd_target *
1349 bfd_search_for_target (int (*search_func) (const bfd_target *, void *),
1350                        void *data)
1351 {
1352   const bfd_target * const *target;
1353
1354   for (target = bfd_target_vector; *target != NULL; target ++)
1355     if (search_func (*target, data))
1356       return *target;
1357
1358   return NULL;
1359 }