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
   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 requries 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 .  bfd_target_unknown_flavour,
 140 .  bfd_target_aout_flavour,
 141 .  bfd_target_coff_flavour,
 142 .  bfd_target_ecoff_flavour,
 143 .  bfd_target_xcoff_flavour,
 144 .  bfd_target_elf_flavour,
 145 .  bfd_target_ieee_flavour,
 146 .  bfd_target_nlm_flavour,
 147 .  bfd_target_oasys_flavour,
 148 .  bfd_target_tekhex_flavour,
 149 .  bfd_target_srec_flavour,
 150 .  bfd_target_ihex_flavour,
 151 .  bfd_target_som_flavour,
 152 .  bfd_target_os9k_flavour,
 153 .  bfd_target_versados_flavour,
 154 .  bfd_target_msdos_flavour,
 155 .  bfd_target_ovax_flavour,
 156 .  bfd_target_evax_flavour
 157 .};
 158 .
 159 .enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
 160 .
 161 .{* Forward declaration.  *}
 162 .typedef struct bfd_link_info _bfd_link_info;
 163 .
 164 .typedef struct bfd_target
 165 .{
 166
 167 Identifies the kind of target, e.g., SunOS4, Ultrix, etc.
 168
 169 .  char *name;
 170
 171 The "flavour" of a back end is a general indication about the contents
 172 of a file.
 173
 174 .  enum bfd_flavour flavour;
 175
 176 The order of bytes within the data area of a file.
 177
 178 .  enum bfd_endian byteorder;
 179
 180 The order of bytes within the header parts of a file.
 181
 182 .  enum bfd_endian header_byteorder;
 183
 184 A mask of all the flags which an executable may have set -
 185 from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.
 186
 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
 192 .  flagword section_flags;
 193
 194 The character normally found at the front of a symbol
 195 (if any), perhaps `_'.
 196
 197 .  char symbol_leading_char;
 198
 199 The pad character for file names within an archive header.
 200
 201 .  char ar_pad_char;
 202
 203 The maximum number of characters in an archive header.
 204
 205 .  unsigned short ar_max_namelen;
 206
 207 Entries for byte swapping for data. These are different from the other
 208 entry points, since they don't take a BFD asthe first argument.
 209 Certain other handlers could do the same.
 210
 211 .  bfd_vma      (*bfd_getx64) PARAMS ((const bfd_byte *));
 212 .  bfd_signed_vma (*bfd_getx_signed_64) PARAMS ((const bfd_byte *));
 213 .  void         (*bfd_putx64) PARAMS ((bfd_vma, bfd_byte *));
 214 .  bfd_vma      (*bfd_getx32) PARAMS ((const bfd_byte *));
 215 .  bfd_signed_vma (*bfd_getx_signed_32) PARAMS ((const bfd_byte *));
 216 .  void         (*bfd_putx32) PARAMS ((bfd_vma, bfd_byte *));
 217 .  bfd_vma      (*bfd_getx16) PARAMS ((const bfd_byte *));
 218 .  bfd_signed_vma (*bfd_getx_signed_16) PARAMS ((const bfd_byte *));
 219 .  void         (*bfd_putx16) PARAMS ((bfd_vma, bfd_byte *));
 220
 221 Byte swapping for the headers
 222
 223 .  bfd_vma      (*bfd_h_getx64) PARAMS ((const bfd_byte *));
 224 .  bfd_signed_vma (*bfd_h_getx_signed_64) PARAMS ((const bfd_byte *));
 225 .  void         (*bfd_h_putx64) PARAMS ((bfd_vma, bfd_byte *));
 226 .  bfd_vma      (*bfd_h_getx32) PARAMS ((const bfd_byte *));
 227 .  bfd_signed_vma (*bfd_h_getx_signed_32) PARAMS ((const bfd_byte *));
 228 .  void         (*bfd_h_putx32) PARAMS ((bfd_vma, bfd_byte *));
 229 .  bfd_vma      (*bfd_h_getx16) PARAMS ((const bfd_byte *));
 230 .  bfd_signed_vma (*bfd_h_getx_signed_16) PARAMS ((const bfd_byte *));
 231 .  void         (*bfd_h_putx16) PARAMS ((bfd_vma, bfd_byte *));
 232
 233 Format dependent routines: these are vectors of entry points
 234 within the target vector structure, one for each format to check.
 235
 236 Check the format of a file being read.  Return a <<bfd_target *>> or zero.
 237
 238 .  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) PARAMS ((bfd *));
 239
 240 Set the format of a file being written.
 241
 242 .  boolean             (*_bfd_set_format[bfd_type_end]) PARAMS ((bfd *));
 243
 244 Write cached information into a file being written, at <<bfd_close>>.
 245
 246 .  boolean             (*_bfd_write_contents[bfd_type_end]) PARAMS ((bfd *));
 247
 248 The general target vector.  These vectors are initialized using the
 249 BFD_JUMP_TABLE macros.
 250
 251 .
 252 .  {* Generic entry points.  *}
 253 .#define BFD_JUMP_TABLE_GENERIC(NAME)\
 254 .CAT(NAME,_close_and_cleanup),\
 255 .CAT(NAME,_bfd_free_cached_info),\
 256 .CAT(NAME,_new_section_hook),\
 257 .CAT(NAME,_get_section_contents),\
 258 .CAT(NAME,_get_section_contents_in_window)
 259 .
 260 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 261 .  boolean       (*_close_and_cleanup) PARAMS ((bfd *));
 262 .  {* Ask the BFD to free all cached information.  *}
 263 .  boolean (*_bfd_free_cached_info) PARAMS ((bfd *));
 264 .  {* Called when a new section is created.  *}
 265 .  boolean       (*_new_section_hook) PARAMS ((bfd *, sec_ptr));
 266 .  {* Read the contents of a section.  *}
 267 .  boolean       (*_bfd_get_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 268 .                                            file_ptr, bfd_size_type));
 269 .  boolean       (*_bfd_get_section_contents_in_window)
 270 .                          PARAMS ((bfd *, sec_ptr, bfd_window *,
 271 .                                   file_ptr, bfd_size_type));
 272 .
 273 .  {* Entry points to copy private data.  *}
 274 .#define BFD_JUMP_TABLE_COPY(NAME)\
 275 .CAT(NAME,_bfd_copy_private_bfd_data),\
 276 .CAT(NAME,_bfd_merge_private_bfd_data),\
 277 .CAT(NAME,_bfd_copy_private_section_data),\
 278 .CAT(NAME,_bfd_copy_private_symbol_data),\
 279 .CAT(NAME,_bfd_set_private_flags),\
 280 .CAT(NAME,_bfd_print_private_bfd_data)\
 281 .  {* Called to copy BFD general private data from one object file
 282 .     to another.  *}
 283 .  boolean       (*_bfd_copy_private_bfd_data) PARAMS ((bfd *, bfd *));
 284 .  {* Called to merge BFD general private data from one object file
 285 .     to a common output file when linking.  *}
 286 .  boolean       (*_bfd_merge_private_bfd_data) PARAMS ((bfd *, bfd *));
 287 .  {* Called to copy BFD private section data from one object file
 288 .     to another.  *}
 289 .  boolean       (*_bfd_copy_private_section_data) PARAMS ((bfd *, sec_ptr,
 290 .                                                       bfd *, sec_ptr));
 291 .  {* Called to copy BFD private symbol data from one symbol
 292 .     to another.  *}
 293 .  boolean       (*_bfd_copy_private_symbol_data) PARAMS ((bfd *, asymbol *,
 294 .                                                          bfd *, asymbol *));
 295 .  {* Called to set private backend flags *}
 296 .  boolean       (*_bfd_set_private_flags) PARAMS ((bfd *, flagword));
 297 .
 298 .  {* Called to print private BFD data *}
 299 .  boolean       (*_bfd_print_private_bfd_data) PARAMS ((bfd *, PTR));
 300 .
 301 .  {* Core file entry points.  *}
 302 .#define BFD_JUMP_TABLE_CORE(NAME)\
 303 .CAT(NAME,_core_file_failing_command),\
 304 .CAT(NAME,_core_file_failing_signal),\
 305 .CAT(NAME,_core_file_matches_executable_p)
 306 .  char *   (*_core_file_failing_command) PARAMS ((bfd *));
 307 .  int      (*_core_file_failing_signal) PARAMS ((bfd *));
 308 .  boolean  (*_core_file_matches_executable_p) PARAMS ((bfd *, bfd *));
 309 .
 310 .  {* Archive entry points.  *}
 311 .#define BFD_JUMP_TABLE_ARCHIVE(NAME)\
 312 .CAT(NAME,_slurp_armap),\
 313 .CAT(NAME,_slurp_extended_name_table),\
 314 .CAT(NAME,_construct_extended_name_table),\
 315 .CAT(NAME,_truncate_arname),\
 316 .CAT(NAME,_write_armap),\
 317 .CAT(NAME,_read_ar_hdr),\
 318 .CAT(NAME,_openr_next_archived_file),\
 319 .CAT(NAME,_get_elt_at_index),\
 320 .CAT(NAME,_generic_stat_arch_elt),\
 321 .CAT(NAME,_update_armap_timestamp)
 322 .  boolean  (*_bfd_slurp_armap) PARAMS ((bfd *));
 323 .  boolean  (*_bfd_slurp_extended_name_table) PARAMS ((bfd *));
 324 .  boolean  (*_bfd_construct_extended_name_table)
 325 .             PARAMS ((bfd *, char **, bfd_size_type *, const char **));
 326 .  void     (*_bfd_truncate_arname) PARAMS ((bfd *, CONST char *, char *));
 327 .  boolean  (*write_armap) PARAMS ((bfd *arch,
 328 .                              unsigned int elength,
 329 .                              struct orl *map,
 330 .                              unsigned int orl_count,
 331 .                              int stridx));
 332 .  PTR (*_bfd_read_ar_hdr_fn) PARAMS ((bfd *));
 333 .  bfd *    (*openr_next_archived_file) PARAMS ((bfd *arch, bfd *prev));
 334 .#define bfd_get_elt_at_index(b,i) BFD_SEND(b, _bfd_get_elt_at_index, (b,i))
 335 .  bfd *    (*_bfd_get_elt_at_index) PARAMS ((bfd *, symindex));
 336 .  int      (*_bfd_stat_arch_elt) PARAMS ((bfd *, struct stat *));
 337 .  boolean  (*_bfd_update_armap_timestamp) PARAMS ((bfd *));
 338 .
 339 .  {* Entry points used for symbols.  *}
 340 .#define BFD_JUMP_TABLE_SYMBOLS(NAME)\
 341 .CAT(NAME,_get_symtab_upper_bound),\
 342 .CAT(NAME,_get_symtab),\
 343 .CAT(NAME,_make_empty_symbol),\
 344 .CAT(NAME,_print_symbol),\
 345 .CAT(NAME,_get_symbol_info),\
 346 .CAT(NAME,_bfd_is_local_label_name),\
 347 .CAT(NAME,_get_lineno),\
 348 .CAT(NAME,_find_nearest_line),\
 349 .CAT(NAME,_bfd_make_debug_symbol),\
 350 .CAT(NAME,_read_minisymbols),\
 351 .CAT(NAME,_minisymbol_to_symbol)
 352 .  long  (*_bfd_get_symtab_upper_bound) PARAMS ((bfd *));
 353 .  long  (*_bfd_canonicalize_symtab) PARAMS ((bfd *,
 354 .                                             struct symbol_cache_entry **));
 355 .  struct symbol_cache_entry  *
 356 .                (*_bfd_make_empty_symbol) PARAMS ((bfd *));
 357 .  void          (*_bfd_print_symbol) PARAMS ((bfd *, PTR,
 358 .                                      struct symbol_cache_entry *,
 359 .                                      bfd_print_symbol_type));
 360 .#define bfd_print_symbol(b,p,s,e) BFD_SEND(b, _bfd_print_symbol, (b,p,s,e))
 361 .  void          (*_bfd_get_symbol_info) PARAMS ((bfd *,
 362 .                                      struct symbol_cache_entry *,
 363 .                                      symbol_info *));
 364 .#define bfd_get_symbol_info(b,p,e) BFD_SEND(b, _bfd_get_symbol_info, (b,p,e))
 365 .  boolean       (*_bfd_is_local_label_name) PARAMS ((bfd *, const char *));
 366 .
 367 .  alent *    (*_get_lineno) PARAMS ((bfd *, struct symbol_cache_entry *));
 368 .  boolean    (*_bfd_find_nearest_line) PARAMS ((bfd *abfd,
 369 .                    struct sec *section, struct symbol_cache_entry **symbols,
 370 .                    bfd_vma offset, CONST char **file, CONST char **func,
 371 .                    unsigned int *line));
 372 . {* Back-door to allow format-aware applications to create debug symbols
 373 .    while using BFD for everything else.  Currently used by the assembler
 374 .    when creating COFF files.  *}
 375 .  asymbol *  (*_bfd_make_debug_symbol) PARAMS ((
 376 .       bfd *abfd,
 377 .       void *ptr,
 378 .       unsigned long size));
 379 .#define bfd_read_minisymbols(b, d, m, s) \
 380 .  BFD_SEND (b, _read_minisymbols, (b, d, m, s))
 381 .  long  (*_read_minisymbols) PARAMS ((bfd *, boolean, PTR *,
 382 .                                      unsigned int *));
 383 .#define bfd_minisymbol_to_symbol(b, d, m, f) \
 384 .  BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
 385 .  asymbol *(*_minisymbol_to_symbol) PARAMS ((bfd *, boolean, const PTR,
 386 .                                             asymbol *));
 387 .
 388 .  {* Routines for relocs.  *}
 389 .#define BFD_JUMP_TABLE_RELOCS(NAME)\
 390 .CAT(NAME,_get_reloc_upper_bound),\
 391 .CAT(NAME,_canonicalize_reloc),\
 392 .CAT(NAME,_bfd_reloc_type_lookup)
 393 .  long  (*_get_reloc_upper_bound) PARAMS ((bfd *, sec_ptr));
 394 .  long  (*_bfd_canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **,
 395 .                                            struct symbol_cache_entry **));
 396 .  {* See documentation on reloc types.  *}
 397 .  reloc_howto_type *
 398 .       (*reloc_type_lookup) PARAMS ((bfd *abfd,
 399 .                                     bfd_reloc_code_real_type code));
 400 .
 401 .  {* Routines used when writing an object file.  *}
 402 .#define BFD_JUMP_TABLE_WRITE(NAME)\
 403 .CAT(NAME,_set_arch_mach),\
 404 .CAT(NAME,_set_section_contents)
 405 .  boolean    (*_bfd_set_arch_mach) PARAMS ((bfd *, enum bfd_architecture,
 406 .                    unsigned long));
 407 .  boolean       (*_bfd_set_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 408 .                                            file_ptr, bfd_size_type));
 409 .
 410 .  {* Routines used by the linker.  *}
 411 .#define BFD_JUMP_TABLE_LINK(NAME)\
 412 .CAT(NAME,_sizeof_headers),\
 413 .CAT(NAME,_bfd_get_relocated_section_contents),\
 414 .CAT(NAME,_bfd_relax_section),\
 415 .CAT(NAME,_bfd_link_hash_table_create),\
 416 .CAT(NAME,_bfd_link_add_symbols),\
 417 .CAT(NAME,_bfd_final_link),\
 418 .CAT(NAME,_bfd_link_split_section),\
 419 .CAT(NAME,_bfd_gc_sections)
 420 .  int        (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean));
 421 .  bfd_byte * (*_bfd_get_relocated_section_contents) PARAMS ((bfd *,
 422 .                    struct bfd_link_info *, struct bfd_link_order *,
 423 .                    bfd_byte *data, boolean relocateable,
 424 .                    struct symbol_cache_entry **));
 425 .
 426 .  boolean    (*_bfd_relax_section) PARAMS ((bfd *, struct sec *,
 427 .                    struct bfd_link_info *, boolean *again));
 428 .
 429 .  {* Create a hash table for the linker.  Different backends store
 430 .     different information in this table.  *}
 431 .  struct bfd_link_hash_table *(*_bfd_link_hash_table_create) PARAMS ((bfd *));
 432 .
 433 .  {* Add symbols from this object file into the hash table.  *}
 434 .  boolean (*_bfd_link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
 435 .
 436 .  {* Do a link based on the link_order structures attached to each
 437 .     section of the BFD.  *}
 438 .  boolean (*_bfd_final_link) PARAMS ((bfd *, struct bfd_link_info *));
 439 .
 440 .  {* Should this section be split up into smaller pieces during linking.  *}
 441 .  boolean (*_bfd_link_split_section) PARAMS ((bfd *, struct sec *));
 442 .
 443 .  {* Remove sections that are not referenced from the output.  *}
 444 .  boolean (*_bfd_gc_sections) PARAMS ((bfd *, struct bfd_link_info *));
 445 .
 446 .  {* Routines to handle dynamic symbols and relocs.  *}
 447 .#define BFD_JUMP_TABLE_DYNAMIC(NAME)\
 448 .CAT(NAME,_get_dynamic_symtab_upper_bound),\
 449 .CAT(NAME,_canonicalize_dynamic_symtab),\
 450 .CAT(NAME,_get_dynamic_reloc_upper_bound),\
 451 .CAT(NAME,_canonicalize_dynamic_reloc)
 452 .  {* Get the amount of memory required to hold the dynamic symbols. *}
 453 .  long  (*_bfd_get_dynamic_symtab_upper_bound) PARAMS ((bfd *));
 454 .  {* Read in the dynamic symbols.  *}
 455 .  long  (*_bfd_canonicalize_dynamic_symtab)
 456 .    PARAMS ((bfd *, struct symbol_cache_entry **));
 457 .  {* Get the amount of memory required to hold the dynamic relocs.  *}
 458 .  long  (*_bfd_get_dynamic_reloc_upper_bound) PARAMS ((bfd *));
 459 .  {* Read in the dynamic relocs.  *}
 460 .  long  (*_bfd_canonicalize_dynamic_reloc)
 461 .    PARAMS ((bfd *, arelent **, struct symbol_cache_entry **));
 462 .
 463
 464 A pointer to an alternative bfd_target in case the current one is not
 465 satisfactory.  This can happen when the target cpu supports both big
 466 and little endian code, and target chosen by the linker has the wrong
 467 endianness.  The function open_output() in ld/ldlang.c uses this field
 468 to find an alternative output format that is suitable.
 469
 470 . {* Opposite endian version of this target.  *}
 471 . const struct bfd_target * alternative_target;
 472 .
 473
 474 Data for use by back-end routines, which isn't generic enough to belong
 475 in this structure.
 476
 477 . PTR backend_data;
 478 .
 479 .} bfd_target;
 480
 481 */
 482
 483 /* All known xvecs (even those that don't compile on all systems).
 484    Alphabetized for easy reference.
 485    They are listed a second time below, since
 486    we can't intermix extern's and initializers.  */
 487 extern const bfd_target a29kcoff_big_vec;
 488 extern const bfd_target a_out_adobe_vec;
 489 extern const bfd_target aout0_big_vec;
 490 extern const bfd_target aout_arm_big_vec;
 491 extern const bfd_target aout_arm_little_vec;
 492 extern const bfd_target aout_mips_big_vec;
 493 extern const bfd_target aout_mips_little_vec;
 494 extern const bfd_target apollocoff_vec;
 495 extern const bfd_target arm_epoc_pe_big_vec;
 496 extern const bfd_target arm_epoc_pe_little_vec;
 497 extern const bfd_target arm_epoc_pei_big_vec;
 498 extern const bfd_target arm_epoc_pei_little_vec;
 499 extern const bfd_target armcoff_big_vec;
 500 extern const bfd_target armcoff_little_vec;
 501 extern const bfd_target armnetbsd_vec;
 502 extern const bfd_target armpe_big_vec;
 503 extern const bfd_target armpe_little_vec;
 504 extern const bfd_target armpei_big_vec;
 505 extern const bfd_target armpei_little_vec;
 506 extern const bfd_target b_out_vec_big_host;
 507 extern const bfd_target b_out_vec_little_host;
 508 extern const bfd_target bfd_efi_app_ia32_vec;
 509 extern const bfd_target bfd_efi_app_ia64_vec;
 510 extern const bfd_target bfd_elf32_avr_vec;
 511 extern const bfd_target bfd_elf32_big_generic_vec;
 512 extern const bfd_target bfd_elf32_bigarc_vec;
 513 extern const bfd_target bfd_elf32_bigarm_oabi_vec;
 514 extern const bfd_target bfd_elf32_bigarm_vec;
 515 extern const bfd_target bfd_elf32_bigmips_vec;
 516 extern const bfd_target bfd_elf32_cris_vec;
 517 extern const bfd_target bfd_elf32_d10v_vec;
 518 extern const bfd_target bfd_elf32_d30v_vec;
 519 extern const bfd_target bfd_elf32_fr30_vec;
 520 extern const bfd_target bfd_elf32_hppa_linux_vec;
 521 extern const bfd_target bfd_elf32_hppa_vec;
 522 extern const bfd_target bfd_elf32_i370_vec;
 523 extern const bfd_target bfd_elf32_i386_vec;
 524 extern const bfd_target bfd_elf32_i860_little_vec;
 525 extern const bfd_target bfd_elf32_i860_vec;
 526 extern const bfd_target bfd_elf32_i960_vec;
 527 extern const bfd_target bfd_elf32_ia64_big_vec;
 528 extern const bfd_target bfd_elf32_little_generic_vec;
 529 extern const bfd_target bfd_elf32_littlearc_vec;
 530 extern const bfd_target bfd_elf32_littlearm_oabi_vec;
 531 extern const bfd_target bfd_elf32_littlearm_vec;
 532 extern const bfd_target bfd_elf32_littlemips_vec;
 533 extern const bfd_target bfd_elf32_m32r_vec;
 534 extern const bfd_target bfd_elf32_m68hc11_vec;
 535 extern const bfd_target bfd_elf32_m68hc12_vec;
 536 extern const bfd_target bfd_elf32_m68k_vec;
 537 extern const bfd_target bfd_elf32_m88k_vec;
 538 extern const bfd_target bfd_elf32_mcore_big_vec;
 539 extern const bfd_target bfd_elf32_mcore_little_vec;
 540 extern const bfd_target bfd_elf32_mn10200_vec;
 541 extern const bfd_target bfd_elf32_mn10300_vec;
 542 extern const bfd_target bfd_elf32_pj_vec;
 543 extern const bfd_target bfd_elf32_pjl_vec;
 544 extern const bfd_target bfd_elf32_powerpc_vec;
 545 extern const bfd_target bfd_elf32_powerpcle_vec;
 546 extern const bfd_target bfd_elf32_s390_vec;
 547 extern const bfd_target bfd_elf32_sh_vec;
 548 extern const bfd_target bfd_elf32_shblin_vec;
 549 extern const bfd_target bfd_elf32_shl_vec;
 550 extern const bfd_target bfd_elf32_shlin_vec;
 551 extern const bfd_target bfd_elf32_sparc_vec;
 552 extern const bfd_target bfd_elf32_tradbigmips_vec;
 553 extern const bfd_target bfd_elf32_tradlittlemips_vec;
 554 extern const bfd_target bfd_elf32_us_cris_vec;
 555 extern const bfd_target bfd_elf32_v850_vec;
 556 extern const bfd_target bfd_elf64_alpha_vec;
 557 extern const bfd_target bfd_elf64_big_generic_vec;
 558 extern const bfd_target bfd_elf64_bigmips_vec;
 559 extern const bfd_target bfd_elf64_hppa_linux_vec;
 560 extern const bfd_target bfd_elf64_hppa_vec;
 561 extern const bfd_target bfd_elf64_ia64_aix_big_vec;
 562 extern const bfd_target bfd_elf64_ia64_aix_little_vec;
 563 extern const bfd_target bfd_elf64_ia64_big_vec;
 564 extern const bfd_target bfd_elf64_ia64_little_vec;
 565 extern const bfd_target bfd_elf64_little_generic_vec;
 566 extern const bfd_target bfd_elf64_littlemips_vec;
 567 extern const bfd_target bfd_elf64_s390_vec;
 568 extern const bfd_target bfd_elf64_sparc_vec;
 569 extern const bfd_target bfd_elf64_x86_64_vec;
 570 extern const bfd_target bfd_powerpc_pe_vec;
 571 extern const bfd_target bfd_powerpc_pei_vec;
 572 extern const bfd_target bfd_powerpcle_pe_vec;
 573 extern const bfd_target bfd_powerpcle_pei_vec;
 574 extern const bfd_target cris_aout_vec;
 575 extern const bfd_target demo_64_vec;
 576 extern const bfd_target ecoff_big_vec;
 577 extern const bfd_target ecoff_biglittle_vec;
 578 extern const bfd_target ecoff_little_vec;
 579 extern const bfd_target ecoffalpha_little_vec;
 580 extern const bfd_target go32coff_vec;
 581 extern const bfd_target go32stubbedcoff_vec;
 582 extern const bfd_target h8300coff_vec;
 583 extern const bfd_target h8500coff_vec;
 584 extern const bfd_target host_aout_vec;
 585 extern const bfd_target hp300bsd_vec;
 586 extern const bfd_target hp300hpux_vec;
 587 extern const bfd_target i386aout_vec;
 588 extern const bfd_target i386bsd_vec;
 589 extern const bfd_target i386coff_vec;
 590 extern const bfd_target i386dynix_vec;
 591 extern const bfd_target i386freebsd_vec;
 592 extern const bfd_target i386linux_vec;
 593 extern const bfd_target i386lynx_aout_vec;
 594 extern const bfd_target i386lynx_coff_vec;
 595 extern const bfd_target i386mach3_vec;
 596 extern const bfd_target i386msdos_vec;
 597 extern const bfd_target i386netbsd_vec;
 598 extern const bfd_target i386os9k_vec;
 599 extern const bfd_target i386pe_vec;
 600 extern const bfd_target i386pei_vec;
 601 extern const bfd_target i860coff_vec;
 602 extern const bfd_target icoff_big_vec;
 603 extern const bfd_target icoff_little_vec;
 604 extern const bfd_target ieee_vec;
 605 extern const bfd_target m68k4knetbsd_vec;
 606 extern const bfd_target m68kaux_coff_vec;
 607 extern const bfd_target m68kcoff_vec;
 608 extern const bfd_target m68kcoffun_vec;
 609 extern const bfd_target m68klinux_vec;
 610 extern const bfd_target m68klynx_aout_vec;
 611 extern const bfd_target m68klynx_coff_vec;
 612 extern const bfd_target m68knetbsd_vec;
 613 extern const bfd_target m68ksysvcoff_vec;
 614 extern const bfd_target m88kbcs_vec;
 615 extern const bfd_target m88kmach3_vec;
 616 extern const bfd_target mcore_pe_big_vec;
 617 extern const bfd_target mcore_pe_little_vec;
 618 extern const bfd_target mcore_pei_big_vec;
 619 extern const bfd_target mcore_pei_little_vec;
 620 extern const bfd_target mipslpe_vec;
 621 extern const bfd_target mipslpei_vec;
 622 extern const bfd_target newsos3_vec;
 623 extern const bfd_target nlm32_alpha_vec;
 624 extern const bfd_target nlm32_i386_vec;
 625 extern const bfd_target nlm32_powerpc_vec;
 626 extern const bfd_target nlm32_sparc_vec;
 627 extern const bfd_target oasys_vec;
 628 extern const bfd_target pc532machaout_vec;
 629 extern const bfd_target pc532netbsd_vec;
 630 extern const bfd_target pdp11_aout_vec;
 631 extern const bfd_target pmac_xcoff_vec;
 632 extern const bfd_target ppcboot_vec;
 633 extern const bfd_target riscix_vec;
 634 extern const bfd_target rs6000coff64_vec;
 635 extern const bfd_target rs6000coff_vec;
 636 extern const bfd_target shcoff_small_vec;
 637 extern const bfd_target shcoff_vec;
 638 extern const bfd_target shlcoff_small_vec;
 639 extern const bfd_target shlcoff_vec;
 640 extern const bfd_target shlpe_vec;
 641 extern const bfd_target shlpei_vec;
 642 extern const bfd_target som_vec;
 643 extern const bfd_target sparccoff_vec;
 644 extern const bfd_target sparcle_aout_vec;
 645 extern const bfd_target sparclinux_vec;
 646 extern const bfd_target sparclynx_aout_vec;
 647 extern const bfd_target sparclynx_coff_vec;
 648 extern const bfd_target sparcnetbsd_vec;
 649 extern const bfd_target sunos_big_vec;
 650 extern const bfd_target tekhex_vec;
 651 extern const bfd_target tic30_aout_vec;
 652 extern const bfd_target tic30_coff_vec;
 653 extern const bfd_target tic54x_coff0_beh_vec;
 654 extern const bfd_target tic54x_coff0_vec;
 655 extern const bfd_target tic54x_coff1_beh_vec;
 656 extern const bfd_target tic54x_coff1_vec;
 657 extern const bfd_target tic54x_coff2_beh_vec;
 658 extern const bfd_target tic54x_coff2_vec;
 659 extern const bfd_target tic80coff_vec;
 660 extern const bfd_target vaxnetbsd_vec;
 661 extern const bfd_target versados_vec;
 662 extern const bfd_target vms_alpha_vec;
 663 extern const bfd_target vms_vax_vec;
 664 extern const bfd_target w65_vec;
 665 extern const bfd_target we32kcoff_vec;
 666 extern const bfd_target z8kcoff_vec;
 667
 668 /* srec is always included.  */
 669 extern const bfd_target srec_vec;
 670 extern const bfd_target symbolsrec_vec;
 671
 672 /* binary is always included.  */
 673 extern const bfd_target binary_vec;
 674
 675 /* ihex is always included.  */
 676 extern const bfd_target ihex_vec;
 677
 678 /* All of the xvecs for core files.  */
 679 extern const bfd_target aix386_core_vec;
 680 extern const bfd_target cisco_core_big_vec;
 681 extern const bfd_target cisco_core_little_vec;
 682 extern const bfd_target hpux_core_vec;
 683 extern const bfd_target hppabsd_core_vec;
 684 extern const bfd_target irix_core_vec;
 685 extern const bfd_target netbsd_core_vec;
 686 extern const bfd_target osf_core_vec;
 687 extern const bfd_target sco5_core_vec;
 688 extern const bfd_target trad_core_vec;
 689 extern const bfd_target ptrace_core_vec;
 690
 691 static const bfd_target * const _bfd_target_vector[] = {
 692
 693 #ifdef SELECT_VECS
 694
 695         SELECT_VECS,
 696
 697 #else /* not SELECT_VECS */
 698
 699 #ifdef DEFAULT_VECTOR
 700         &DEFAULT_VECTOR,
 701 #endif
 702         /* This list is alphabetized to make it easy to compare
 703            with other vector lists -- the decls above and
 704            the case statement in configure.in.
 705            Vectors that don't compile on all systems, or aren't finished,
 706            should have an entry here with #if 0 around it, to show that
 707            it wasn't omitted by mistake.  */
 708         &a29kcoff_big_vec,
 709         &a_out_adobe_vec,
 710 #if 0                           /* No one seems to use this.  */
 711         &aout_mips_big_vec,
 712 #endif
 713         &aout_mips_little_vec,
 714         &b_out_vec_big_host,
 715         &b_out_vec_little_host,
 716
 717         &bfd_efi_app_ia32_vec,
 718 #ifdef BFD64
 719         &bfd_efi_app_ia64_vec,
 720 #endif
 721
 722         /* This, and other vectors, may not be used in any *.mt configuration.
 723            But that does not mean they are unnecessary.  If configured with
 724            --enable-targets=all, objdump or gdb should be able to examine
 725            the file even if we don't recognize the machine type.  */
 726         &bfd_elf32_big_generic_vec,
 727 #ifdef BFD64
 728         &bfd_elf64_alpha_vec,
 729         &bfd_elf64_hppa_vec,
 730         &bfd_elf64_hppa_linux_vec,
 731         &bfd_elf64_ia64_aix_little_vec,
 732         &bfd_elf64_ia64_aix_big_vec,
 733         &bfd_elf64_ia64_little_vec,
 734         &bfd_elf64_ia64_big_vec,
 735 #endif
 736         &bfd_elf32_avr_vec,
 737         &bfd_elf32_bigarc_vec,
 738         &bfd_elf32_bigarm_vec,
 739         &bfd_elf32_bigarm_oabi_vec,
 740         &bfd_elf32_bigmips_vec,
 741 #ifdef BFD64
 742         &bfd_elf64_bigmips_vec,
 743 #endif
 744         &bfd_elf32_cris_vec,
 745         &bfd_elf32_us_cris_vec,
 746         &bfd_elf32_d10v_vec,
 747         &bfd_elf32_d30v_vec,
 748         &bfd_elf32_hppa_vec,
 749         &bfd_elf32_hppa_linux_vec,
 750         &bfd_elf32_i370_vec,
 751         &bfd_elf32_i386_vec,
 752 #ifdef BFD64
 753         &bfd_elf64_x86_64_vec,
 754 #endif
 755         &bfd_elf32_i860_vec,
 756         &bfd_elf32_i860_little_vec,
 757         &bfd_elf32_i960_vec,
 758         &bfd_elf32_little_generic_vec,
 759         &bfd_elf32_littlearc_vec,
 760         &bfd_elf32_littlearm_vec,
 761         &bfd_elf32_littlearm_oabi_vec,
 762         &bfd_elf32_littlemips_vec,
 763 #ifdef BFD64
 764         &bfd_elf64_littlemips_vec,
 765 #endif
 766         &bfd_elf32_m32r_vec,
 767         &bfd_elf32_mn10200_vec,
 768         &bfd_elf32_mn10300_vec,
 769         &bfd_elf32_m68hc11_vec,
 770         &bfd_elf32_m68hc12_vec,
 771         &bfd_elf32_m68k_vec,
 772         &bfd_elf32_m88k_vec,
 773         &bfd_elf32_sparc_vec,
 774         &bfd_elf32_pj_vec,
 775         &bfd_elf32_pjl_vec,
 776         &bfd_elf32_powerpc_vec,
 777         &bfd_elf32_powerpcle_vec,
 778         &bfd_elf32_v850_vec,
 779         &bfd_elf32_fr30_vec,
 780         &bfd_elf32_mcore_big_vec,
 781         &bfd_elf32_mcore_little_vec,
 782         &bfd_elf32_tradbigmips_vec,
 783         &bfd_elf32_tradlittlemips_vec,
 784 #ifdef BFD64                    /* No one seems to use this.  */
 785         &bfd_elf64_big_generic_vec,
 786         &bfd_elf64_little_generic_vec,
 787 #endif
 788 #if 0
 789         &bfd_elf64_sparc_vec,
 790 #endif
 791         /* We don't include cisco_core_*_vec.  Although it has a magic number,
 792            the magic number isn't at the beginning of the file, and thus
 793            might spuriously match other kinds of files.  */
 794
 795         &cris_aout_vec,
 796 #ifdef BFD64
 797         &demo_64_vec,   /* Only compiled if host has long-long support */
 798 #endif
 799         &ecoff_big_vec,
 800         &ecoff_little_vec,
 801         &ecoff_biglittle_vec,
 802 #ifdef BFD64
 803         &ecoffalpha_little_vec,
 804 #endif
 805         &h8300coff_vec,
 806         &h8500coff_vec,
 807 #if 0
 808         /* Since a.out files lack decent magic numbers, no way to recognize
 809            which kind of a.out file it is.  */
 810         &host_aout_vec,
 811 #endif
 812 #if 0                           /* Clashes with sunos_big_vec magic no.  */
 813         &hp300bsd_vec,
 814 #endif
 815         &hp300hpux_vec,
 816 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
 817         &som_vec,
 818 #endif
 819         &i386aout_vec,
 820         &i386bsd_vec,
 821         &i386coff_vec,
 822         &i386freebsd_vec,
 823         &i860coff_vec,
 824         &bfd_powerpc_pe_vec,
 825         &bfd_powerpcle_pe_vec,
 826         &bfd_powerpc_pei_vec,
 827         &bfd_powerpcle_pei_vec,
 828         &go32coff_vec,
 829         &go32stubbedcoff_vec,
 830 #if 0
 831         /* Since a.out files lack decent magic numbers, no way to recognize
 832            which kind of a.out file it is.  */
 833         &i386linux_vec,
 834 #endif
 835         &i386lynx_aout_vec,
 836         &i386lynx_coff_vec,
 837 #if 0
 838         /* No distinguishing features for Mach 3 executables.  */
 839         &i386mach3_vec,
 840 #endif
 841         &i386msdos_vec,
 842         &i386netbsd_vec,
 843         &i386os9k_vec,
 844         &i386pe_vec,
 845         &i386pei_vec,
 846         &armcoff_little_vec,
 847         &armcoff_big_vec,
 848         &armnetbsd_vec,
 849         &armpe_little_vec,
 850         &armpe_big_vec,
 851         &armpei_little_vec,
 852         &armpei_big_vec,
 853         &arm_epoc_pe_little_vec,
 854         &arm_epoc_pe_big_vec,
 855         &arm_epoc_pei_little_vec,
 856         &arm_epoc_pei_big_vec,
 857         &icoff_big_vec,
 858         &icoff_little_vec,
 859         &ieee_vec,
 860         &m68kcoff_vec,
 861         &m68kcoffun_vec,
 862 #if 0
 863         /* Since a.out files lack decent magic numbers, no way to recognize
 864            which kind of a.out file it is.  */
 865         &m68klinux_vec,
 866 #endif
 867         &m68klynx_aout_vec,
 868         &m68klynx_coff_vec,
 869         &m68knetbsd_vec,
 870         &m68ksysvcoff_vec,
 871         &m88kbcs_vec,
 872         &m88kmach3_vec,
 873         &mcore_pe_big_vec,
 874         &mcore_pe_little_vec,
 875         &mcore_pei_big_vec,
 876         &mcore_pei_little_vec,
 877         &newsos3_vec,
 878         &nlm32_i386_vec,
 879         &nlm32_sparc_vec,
 880 #ifdef BFD64
 881         &nlm32_alpha_vec,
 882 #endif
 883         &pc532netbsd_vec,
 884 #if 0
 885         /* We have no oasys tools anymore, so we can't test any of this
 886            anymore. If you want to test the stuff yourself, go ahead...
 887            steve@cygnus.com
 888            Worse, since there is no magic number for archives, there
 889            can be annoying target mis-matches.  */
 890         &oasys_vec,
 891 #endif
 892         &pc532machaout_vec,
 893         &pdp11_aout_vec,
 894 #if 0
 895         /* We have no way of distinguishing these from other a.out variants */
 896         &aout_arm_big_vec,
 897         &aout_arm_little_vec,
 898         &riscix_vec,
 899 #endif
 900 #if 0
 901         /* This has the same magic number as RS/6000.  */
 902         &pmac_xcoff_vec,
 903 #endif
 904         &rs6000coff_vec,
 905 #ifdef BFD64
 906         &rs6000coff64_vec,
 907 #endif
 908         &ppcboot_vec,
 909         &shcoff_vec,
 910         &shlcoff_vec,
 911         &shcoff_small_vec,
 912         &shlcoff_small_vec,
 913         &sparcle_aout_vec,
 914         &sparclinux_vec,
 915         &sparclynx_aout_vec,
 916         &sparclynx_coff_vec,
 917         &sparcnetbsd_vec,
 918         &sunos_big_vec,
 919         &aout0_big_vec,
 920         &tic30_aout_vec,
 921         &tic30_coff_vec,
 922         &tic54x_coff0_vec,
 923         &tic54x_coff0_beh_vec,
 924         &tic54x_coff1_vec,
 925         &tic54x_coff1_beh_vec,
 926         &tic54x_coff2_vec,
 927         &tic54x_coff2_beh_vec,
 928         &tic80coff_vec,
 929         &vaxnetbsd_vec,
 930         &versados_vec,
 931 #ifdef BFD64
 932         &vms_alpha_vec,
 933 #endif
 934         &vms_vax_vec,
 935         &we32kcoff_vec,
 936         &z8kcoff_vec,
 937         &bfd_elf32_s390_vec,
 938 #ifdef BFD64
 939         &bfd_elf64_s390_vec,
 940 #endif
 941 #endif /* not SELECT_VECS */
 942
 943 /* Always support S-records, for convenience.  */
 944         &srec_vec,
 945         &symbolsrec_vec,
 946 /* And tekhex */
 947         &tekhex_vec,
 948 /* Likewise for binary output.  */
 949         &binary_vec,
 950 /* Likewise for ihex.  */
 951         &ihex_vec,
 952
 953 /* Add any required traditional-core-file-handler.  */
 954
 955 #ifdef AIX386_CORE
 956         &aix386_core_vec,
 957 #endif
 958 #ifdef HPUX_CORE
 959         &hpux_core_vec,
 960 #endif
 961 #ifdef HPPABSD_CORE
 962         &hppabsd_core_vec,
 963 #endif
 964 #ifdef IRIX_CORE
 965         &irix_core_vec,
 966 #endif
 967 #ifdef NETBSD_CORE
 968         &netbsd_core_vec,
 969 #endif
 970 #ifdef OSF_CORE
 971         &osf_core_vec,
 972 #endif
 973 #ifdef SCO5_CORE
 974         &sco5_core_vec,
 975 #endif
 976 #ifdef  TRAD_CORE
 977         &trad_core_vec,
 978 #endif
 979
 980 #ifdef  PTRACE_CORE
 981         &ptrace_core_vec,
 982 #endif
 983
 984         NULL /* end of list marker */
 985 };
 986 const bfd_target * const *bfd_target_vector = _bfd_target_vector;
 987
 988 /* bfd_default_vector[0] contains either the address of the default vector,
 989    if there is one, or zero if there isn't.  */
 990
 991 const bfd_target *bfd_default_vector[] = {
 992 #ifdef DEFAULT_VECTOR
 993         &DEFAULT_VECTOR,
 994 #endif
 995         NULL
 996 };
 997
 998 /* When there is an ambiguous match, bfd_check_format_matches puts the
 999    names of the matching targets in an array.  This variable is the maximum
1000    number of entries that the array could possibly need.  */
1001 const size_t _bfd_target_vector_entries = sizeof (bfd_target_vector)/sizeof (*bfd_target_vector);
1002 \f
1003 /* This array maps configuration triplets onto BFD vectors.  */
1004
1005 struct targmatch
1006 {
1007   /* The configuration triplet.  */
1008   const char *triplet;
1009   /* The BFD vector.  If this is NULL, then the vector is found by
1010      searching forward for the next structure with a non NULL vector
1011      field.  */
1012   const bfd_target *vector;
1013 };
1014
1015 /* targmatch.h is built by Makefile out of config.bfd.  */
1016 static const struct targmatch bfd_target_match[] = {
1017 #include "targmatch.h"
1018   { NULL, NULL }
1019 };
1020
1021 static const bfd_target *find_target PARAMS ((const char *));
1022
1023 /* Find a target vector, given a name or configuration triplet.  */
1024
1025 static const bfd_target *
1026 find_target (name)
1027      const char *name;
1028 {
1029   const bfd_target * const *target;
1030   const struct targmatch *match;
1031
1032   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1033     if (strcmp (name, (*target)->name) == 0)
1034       return *target;
1035
1036   /* If we couldn't match on the exact name, try matching on the
1037      configuration triplet.  FIXME: We should run the triplet through
1038      config.sub first, but that is hard.  */
1039   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1040     {
1041       if (fnmatch (match->triplet, name, 0) == 0)
1042         {
1043           while (match->vector == NULL)
1044             ++match;
1045           return match->vector;
1046           break;
1047         }
1048     }
1049
1050   bfd_set_error (bfd_error_invalid_target);
1051   return NULL;
1052 }
1053
1054 /*
1055 FUNCTION
1056         bfd_set_default_target
1057
1058 SYNOPSIS
1059         boolean bfd_set_default_target (const char *name);
1060
1061 DESCRIPTION
1062         Set the default target vector to use when recognizing a BFD.
1063         This takes the name of the target, which may be a BFD target
1064         name or a configuration triplet.
1065 */
1066
1067 boolean
1068 bfd_set_default_target (name)
1069      const char *name;
1070 {
1071   const bfd_target *target;
1072
1073   if (bfd_default_vector[0] != NULL
1074       && strcmp (name, bfd_default_vector[0]->name) == 0)
1075     return true;
1076
1077   target = find_target (name);
1078   if (target == NULL)
1079     return false;
1080
1081   bfd_default_vector[0] = target;
1082   return true;
1083 }
1084
1085 /*
1086 FUNCTION
1087         bfd_find_target
1088
1089 SYNOPSIS
1090         const bfd_target *bfd_find_target(CONST char *target_name, bfd *abfd);
1091
1092 DESCRIPTION
1093         Return a pointer to the transfer vector for the object target
1094         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
1095         one in the environment variable <<GNUTARGET>>; if that is null or not
1096         defined, then choose the first entry in the target list.
1097         Passing in the string "default" or setting the environment
1098         variable to "default" will cause the first entry in the target
1099         list to be returned, and "target_defaulted" will be set in the
1100         BFD.  This causes <<bfd_check_format>> to loop over all the
1101         targets to find the one that matches the file being read.
1102 */
1103
1104 const bfd_target *
1105 bfd_find_target (target_name, abfd)
1106      const char *target_name;
1107      bfd *abfd;
1108 {
1109   const char *targname;
1110   const bfd_target *target;
1111
1112   if (target_name != NULL)
1113     targname = target_name;
1114   else
1115     targname = getenv ("GNUTARGET");
1116
1117   /* This is safe; the vector cannot be null */
1118   if (targname == NULL || strcmp (targname, "default") == 0)
1119     {
1120       abfd->target_defaulted = true;
1121       if (bfd_default_vector[0] != NULL)
1122         abfd->xvec = bfd_default_vector[0];
1123       else
1124         abfd->xvec = bfd_target_vector[0];
1125       return abfd->xvec;
1126     }
1127
1128   abfd->target_defaulted = false;
1129
1130   target = find_target (targname);
1131   if (target == NULL)
1132     return NULL;
1133
1134   abfd->xvec = target;
1135   return target;
1136 }
1137
1138 /*
1139 FUNCTION
1140         bfd_target_list
1141
1142 SYNOPSIS
1143         const char **bfd_target_list(void);
1144
1145 DESCRIPTION
1146         Return a freshly malloced NULL-terminated
1147         vector of the names of all the valid BFD targets. Do not
1148         modify the names.
1149
1150 */
1151
1152 const char **
1153 bfd_target_list ()
1154 {
1155   int vec_length= 0;
1156 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1157   /* The native compiler on the HP9000/700 has a bug which causes it
1158      to loop endlessly when compiling this file.  This avoids it.  */
1159   volatile
1160 #endif
1161     const bfd_target * const *target;
1162   CONST  char **name_list, **name_ptr;
1163
1164   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1165     vec_length++;
1166
1167   name_ptr = name_list = (CONST char **)
1168     bfd_zmalloc ((vec_length + 1) * sizeof (char **));
1169
1170   if (name_list == NULL)
1171     return NULL;
1172
1173   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1174     *(name_ptr++) = (*target)->name;
1175
1176   return name_list;
1177 }
1178
1179 /*
1180 FUNCTION
1181         bfd_seach_for_target
1182
1183 SYNOPSIS
1184         const bfd_target * bfd_search_for_target (int (* search_func) (const bfd_target *, void *), void *);
1185
1186 DESCRIPTION
1187         Return a pointer to the first transfer vector in the list of
1188         transfer vectors maintained by BFD that produces a non-zero
1189         result when passed to the function @var{search_func}.  The
1190         parameter @var{data} is passed, unexamined, to the search
1191         function.
1192 */
1193
1194 const bfd_target *
1195 bfd_search_for_target (search_func, data)
1196      int (* search_func) PARAMS ((const bfd_target * target, void * data));
1197      void * data;
1198 {
1199   const bfd_target * const * target;
1200
1201   for (target = bfd_target_vector; * target != NULL; target ++)
1202     if (search_func (* target, data))
1203       return * target;
1204
1205   return NULL;
1206 }