bfd/targets.c

   1 /* Generic target-file-type support for the BFD library.
   2    Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
   3    Free Software Foundation, Inc.
   4    Written by Cygnus Support.
   5
   6 This file is part of BFD, the Binary File Descriptor library.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libbfd.h"
  25 #include "fnmatch.h"
  26
  27 /*
  28 SECTION
  29         Targets
  30
  31 DESCRIPTION
  32         Each port of BFD to a different machine requries the creation
  33         of a target back end. All the back end provides to the root
  34         part of BFD is a structure containing pointers to functions
  35         which perform certain low level operations on files. BFD
  36         translates the applications's requests through a pointer into
  37         calls to the back end routines.
  38
  39         When a file is opened with <<bfd_openr>>, its format and
  40         target are unknown. BFD uses various mechanisms to determine
  41         how to interpret the file. The operations performed are:
  42
  43         o Create a BFD by calling the internal routine
  44         <<_bfd_new_bfd>>, then call <<bfd_find_target>> with the
  45         target string supplied to <<bfd_openr>> and the new BFD pointer.
  46
  47         o If a null target string was provided to <<bfd_find_target>>,
  48         look up the environment variable <<GNUTARGET>> and use
  49         that as the target string.
  50
  51         o If the target string is still <<NULL>>, or the target string is
  52         <<default>>, then use the first item in the target vector
  53         as the target type, and set <<target_defaulted>> in the BFD to
  54         cause <<bfd_check_format>> to loop through all the targets.
  55         @xref{bfd_target}.  @xref{Formats}.
  56
  57         o Otherwise, inspect the elements in the target vector
  58         one by one, until a match on target name is found. When found,
  59         use it.
  60
  61         o Otherwise return the error <<bfd_error_invalid_target>> to
  62         <<bfd_openr>>.
  63
  64         o <<bfd_openr>> attempts to open the file using
  65         <<bfd_open_file>>, and returns the BFD.
  66
  67         Once the BFD has been opened and the target selected, the file
  68         format may be determined. This is done by calling
  69         <<bfd_check_format>> on the BFD with a suggested format.
  70         If <<target_defaulted>> has been set, each possible target
  71         type is tried to see if it recognizes the specified format.
  72         <<bfd_check_format>> returns <<true>> when the caller guesses right.
  73 @menu
  74 @* bfd_target::
  75 @end menu
  76 */
  77
  78 /*
  79
  80 INODE
  81         bfd_target,  , Targets, Targets
  82 DOCDD
  83 SUBSECTION
  84         bfd_target
  85
  86 DESCRIPTION
  87         This structure contains everything that BFD knows about a
  88         target. It includes things like its byte order, name, and which
  89         routines to call to do various operations.
  90
  91         Every BFD points to a target structure with its <<xvec>>
  92         member.
  93
  94         The macros below are used to dispatch to functions through the
  95         <<bfd_target>> vector. They are used in a number of macros further
  96         down in @file{bfd.h}, and are also used when calling various
  97         routines by hand inside the BFD implementation.  The @var{arglist}
  98         argument must be parenthesized; it contains all the arguments
  99         to the called function.
 100
 101         They make the documentation (more) unpleasant to read, so if
 102         someone wants to fix this and not break the above, please do.
 103
 104 .#define BFD_SEND(bfd, message, arglist) \
 105 .               ((*((bfd)->xvec->message)) arglist)
 106 .
 107 .#ifdef DEBUG_BFD_SEND
 108 .#undef BFD_SEND
 109 .#define BFD_SEND(bfd, message, arglist) \
 110 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 111 .    ((*((bfd)->xvec->message)) arglist) : \
 112 .    (bfd_assert (__FILE__,__LINE__), NULL))
 113 .#endif
 114
 115         For operations which index on the BFD format:
 116
 117 .#define BFD_SEND_FMT(bfd, message, arglist) \
 118 .            (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist)
 119 .
 120 .#ifdef DEBUG_BFD_SEND
 121 .#undef BFD_SEND_FMT
 122 .#define BFD_SEND_FMT(bfd, message, arglist) \
 123 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 124 .   (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist) : \
 125 .   (bfd_assert (__FILE__,__LINE__), NULL))
 126 .#endif
 127
 128         This is the structure which defines the type of BFD this is.  The
 129         <<xvec>> member of the struct <<bfd>> itself points here.  Each
 130         module that implements access to a different target under BFD,
 131         defines one of these.
 132
 133         FIXME, these names should be rationalised with the names of
 134         the entry points which call them. Too bad we can't have one
 135         macro to define them both!
 136
 137 .enum bfd_flavour {
 138 .  bfd_target_unknown_flavour,
 139 .  bfd_target_aout_flavour,
 140 .  bfd_target_coff_flavour,
 141 .  bfd_target_ecoff_flavour,
 142 .  bfd_target_xcoff_flavour,
 143 .  bfd_target_elf_flavour,
 144 .  bfd_target_ieee_flavour,
 145 .  bfd_target_nlm_flavour,
 146 .  bfd_target_oasys_flavour,
 147 .  bfd_target_tekhex_flavour,
 148 .  bfd_target_srec_flavour,
 149 .  bfd_target_ihex_flavour,
 150 .  bfd_target_som_flavour,
 151 .  bfd_target_os9k_flavour,
 152 .  bfd_target_versados_flavour,
 153 .  bfd_target_msdos_flavour,
 154 .  bfd_target_ovax_flavour,
 155 .  bfd_target_evax_flavour
 156 .};
 157 .
 158 .enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
 159 .
 160 .{* Forward declaration.  *}
 161 .typedef struct bfd_link_info _bfd_link_info;
 162 .
 163 .typedef struct bfd_target
 164 .{
 165
 166 Identifies the kind of target, e.g., SunOS4, Ultrix, etc.
 167
 168 .  char *name;
 169
 170 The "flavour" of a back end is a general indication about the contents
 171 of a file.
 172
 173 .  enum bfd_flavour flavour;
 174
 175 The order of bytes within the data area of a file.
 176
 177 .  enum bfd_endian byteorder;
 178
 179 The order of bytes within the header parts of a file.
 180
 181 .  enum bfd_endian header_byteorder;
 182
 183 A mask of all the flags which an executable may have set -
 184 from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.
 185
 186 .  flagword object_flags;
 187
 188 A mask of all the flags which a section may have set - from
 189 the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.
 190
 191 .  flagword section_flags;
 192
 193 The character normally found at the front of a symbol
 194 (if any), perhaps `_'.
 195
 196 .  char symbol_leading_char;
 197
 198 The pad character for file names within an archive header.
 199
 200 .  char ar_pad_char;
 201
 202 The maximum number of characters in an archive header.
 203
 204 .  unsigned short ar_max_namelen;
 205
 206 Entries for byte swapping for data. These are different from the other
 207 entry points, since they don't take a BFD asthe first argument.
 208 Certain other handlers could do the same.
 209
 210 .  bfd_vma      (*bfd_getx64) PARAMS ((const bfd_byte *));
 211 .  bfd_signed_vma (*bfd_getx_signed_64) PARAMS ((const bfd_byte *));
 212 .  void         (*bfd_putx64) PARAMS ((bfd_vma, bfd_byte *));
 213 .  bfd_vma      (*bfd_getx32) PARAMS ((const bfd_byte *));
 214 .  bfd_signed_vma (*bfd_getx_signed_32) PARAMS ((const bfd_byte *));
 215 .  void         (*bfd_putx32) PARAMS ((bfd_vma, bfd_byte *));
 216 .  bfd_vma      (*bfd_getx16) PARAMS ((const bfd_byte *));
 217 .  bfd_signed_vma (*bfd_getx_signed_16) PARAMS ((const bfd_byte *));
 218 .  void         (*bfd_putx16) PARAMS ((bfd_vma, bfd_byte *));
 219
 220 Byte swapping for the headers
 221
 222 .  bfd_vma      (*bfd_h_getx64) PARAMS ((const bfd_byte *));
 223 .  bfd_signed_vma (*bfd_h_getx_signed_64) PARAMS ((const bfd_byte *));
 224 .  void         (*bfd_h_putx64) PARAMS ((bfd_vma, bfd_byte *));
 225 .  bfd_vma      (*bfd_h_getx32) PARAMS ((const bfd_byte *));
 226 .  bfd_signed_vma (*bfd_h_getx_signed_32) PARAMS ((const bfd_byte *));
 227 .  void         (*bfd_h_putx32) PARAMS ((bfd_vma, bfd_byte *));
 228 .  bfd_vma      (*bfd_h_getx16) PARAMS ((const bfd_byte *));
 229 .  bfd_signed_vma (*bfd_h_getx_signed_16) PARAMS ((const bfd_byte *));
 230 .  void         (*bfd_h_putx16) PARAMS ((bfd_vma, bfd_byte *));
 231
 232 Format dependent routines: these are vectors of entry points
 233 within the target vector structure, one for each format to check.
 234
 235 Check the format of a file being read.  Return a <<bfd_target *>> or zero.
 236
 237 .  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) PARAMS ((bfd *));
 238
 239 Set the format of a file being written.
 240
 241 .  boolean             (*_bfd_set_format[bfd_type_end]) PARAMS ((bfd *));
 242
 243 Write cached information into a file being written, at <<bfd_close>>.
 244
 245 .  boolean             (*_bfd_write_contents[bfd_type_end]) PARAMS ((bfd *));
 246
 247 The general target vector.  These vectors are initialized using the
 248 BFD_JUMP_TABLE macros.
 249
 250 .
 251 .  {* Generic entry points.  *}
 252 .#define BFD_JUMP_TABLE_GENERIC(NAME)\
 253 .CAT(NAME,_close_and_cleanup),\
 254 .CAT(NAME,_bfd_free_cached_info),\
 255 .CAT(NAME,_new_section_hook),\
 256 .CAT(NAME,_get_section_contents),\
 257 .CAT(NAME,_get_section_contents_in_window)
 258 .
 259 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 260 .  boolean       (*_close_and_cleanup) PARAMS ((bfd *));
 261 .  {* Ask the BFD to free all cached information.  *}
 262 .  boolean (*_bfd_free_cached_info) PARAMS ((bfd *));
 263 .  {* Called when a new section is created.  *}
 264 .  boolean       (*_new_section_hook) PARAMS ((bfd *, sec_ptr));
 265 .  {* Read the contents of a section.  *}
 266 .  boolean       (*_bfd_get_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 267 .                                            file_ptr, bfd_size_type));
 268 .  boolean       (*_bfd_get_section_contents_in_window)
 269 .                          PARAMS ((bfd *, sec_ptr, bfd_window *,
 270 .                                   file_ptr, bfd_size_type));
 271 .
 272 .  {* Entry points to copy private data.  *}
 273 .#define BFD_JUMP_TABLE_COPY(NAME)\
 274 .CAT(NAME,_bfd_copy_private_bfd_data),\
 275 .CAT(NAME,_bfd_merge_private_bfd_data),\
 276 .CAT(NAME,_bfd_copy_private_section_data),\
 277 .CAT(NAME,_bfd_copy_private_symbol_data),\
 278 .CAT(NAME,_bfd_set_private_flags),\
 279 .CAT(NAME,_bfd_print_private_bfd_data)\
 280 .  {* Called to copy BFD general private data from one object file
 281 .     to another.  *}
 282 .  boolean       (*_bfd_copy_private_bfd_data) PARAMS ((bfd *, bfd *));
 283 .  {* Called to merge BFD general private data from one object file
 284 .     to a common output file when linking.  *}
 285 .  boolean       (*_bfd_merge_private_bfd_data) PARAMS ((bfd *, bfd *));
 286 .  {* Called to copy BFD private section data from one object file
 287 .     to another.  *}
 288 .  boolean       (*_bfd_copy_private_section_data) PARAMS ((bfd *, sec_ptr,
 289 .                                                       bfd *, sec_ptr));
 290 .  {* Called to copy BFD private symbol data from one symbol
 291 .     to another.  *}
 292 .  boolean       (*_bfd_copy_private_symbol_data) PARAMS ((bfd *, asymbol *,
 293 .                                                          bfd *, asymbol *));
 294 .  {* Called to set private backend flags *}
 295 .  boolean       (*_bfd_set_private_flags) PARAMS ((bfd *, flagword));
 296 .
 297 .  {* Called to print private BFD data *}
 298 .  boolean       (*_bfd_print_private_bfd_data) PARAMS ((bfd *, PTR));
 299 .
 300 .  {* Core file entry points.  *}
 301 .#define BFD_JUMP_TABLE_CORE(NAME)\
 302 .CAT(NAME,_core_file_failing_command),\
 303 .CAT(NAME,_core_file_failing_signal),\
 304 .CAT(NAME,_core_file_matches_executable_p)
 305 .  char *   (*_core_file_failing_command) PARAMS ((bfd *));
 306 .  int      (*_core_file_failing_signal) PARAMS ((bfd *));
 307 .  boolean  (*_core_file_matches_executable_p) PARAMS ((bfd *, bfd *));
 308 .
 309 .  {* Archive entry points.  *}
 310 .#define BFD_JUMP_TABLE_ARCHIVE(NAME)\
 311 .CAT(NAME,_slurp_armap),\
 312 .CAT(NAME,_slurp_extended_name_table),\
 313 .CAT(NAME,_construct_extended_name_table),\
 314 .CAT(NAME,_truncate_arname),\
 315 .CAT(NAME,_write_armap),\
 316 .CAT(NAME,_read_ar_hdr),\
 317 .CAT(NAME,_openr_next_archived_file),\
 318 .CAT(NAME,_get_elt_at_index),\
 319 .CAT(NAME,_generic_stat_arch_elt),\
 320 .CAT(NAME,_update_armap_timestamp)
 321 .  boolean  (*_bfd_slurp_armap) PARAMS ((bfd *));
 322 .  boolean  (*_bfd_slurp_extended_name_table) PARAMS ((bfd *));
 323 .  boolean  (*_bfd_construct_extended_name_table)
 324 .             PARAMS ((bfd *, char **, bfd_size_type *, const char **));
 325 .  void     (*_bfd_truncate_arname) PARAMS ((bfd *, CONST char *, char *));
 326 .  boolean  (*write_armap) PARAMS ((bfd *arch,
 327 .                              unsigned int elength,
 328 .                              struct orl *map,
 329 .                              unsigned int orl_count,
 330 .                              int stridx));
 331 .  PTR (*_bfd_read_ar_hdr_fn) PARAMS ((bfd *));
 332 .  bfd *    (*openr_next_archived_file) PARAMS ((bfd *arch, bfd *prev));
 333 .#define bfd_get_elt_at_index(b,i) BFD_SEND(b, _bfd_get_elt_at_index, (b,i))
 334 .  bfd *    (*_bfd_get_elt_at_index) PARAMS ((bfd *, symindex));
 335 .  int      (*_bfd_stat_arch_elt) PARAMS ((bfd *, struct stat *));
 336 .  boolean  (*_bfd_update_armap_timestamp) PARAMS ((bfd *));
 337 .
 338 .  {* Entry points used for symbols.  *}
 339 .#define BFD_JUMP_TABLE_SYMBOLS(NAME)\
 340 .CAT(NAME,_get_symtab_upper_bound),\
 341 .CAT(NAME,_get_symtab),\
 342 .CAT(NAME,_make_empty_symbol),\
 343 .CAT(NAME,_print_symbol),\
 344 .CAT(NAME,_get_symbol_info),\
 345 .CAT(NAME,_bfd_is_local_label_name),\
 346 .CAT(NAME,_get_lineno),\
 347 .CAT(NAME,_find_nearest_line),\
 348 .CAT(NAME,_bfd_make_debug_symbol),\
 349 .CAT(NAME,_read_minisymbols),\
 350 .CAT(NAME,_minisymbol_to_symbol)
 351 .  long  (*_bfd_get_symtab_upper_bound) PARAMS ((bfd *));
 352 .  long  (*_bfd_canonicalize_symtab) PARAMS ((bfd *,
 353 .                                             struct symbol_cache_entry **));
 354 .  struct symbol_cache_entry  *
 355 .                (*_bfd_make_empty_symbol) PARAMS ((bfd *));
 356 .  void          (*_bfd_print_symbol) PARAMS ((bfd *, PTR,
 357 .                                      struct symbol_cache_entry *,
 358 .                                      bfd_print_symbol_type));
 359 .#define bfd_print_symbol(b,p,s,e) BFD_SEND(b, _bfd_print_symbol, (b,p,s,e))
 360 .  void          (*_bfd_get_symbol_info) PARAMS ((bfd *,
 361 .                                      struct symbol_cache_entry *,
 362 .                                      symbol_info *));
 363 .#define bfd_get_symbol_info(b,p,e) BFD_SEND(b, _bfd_get_symbol_info, (b,p,e))
 364 .  boolean       (*_bfd_is_local_label_name) PARAMS ((bfd *, const char *));
 365 .
 366 .  alent *    (*_get_lineno) PARAMS ((bfd *, struct symbol_cache_entry *));
 367 .  boolean    (*_bfd_find_nearest_line) PARAMS ((bfd *abfd,
 368 .                    struct sec *section, struct symbol_cache_entry **symbols,
 369 .                    bfd_vma offset, CONST char **file, CONST char **func,
 370 .                    unsigned int *line));
 371 . {* Back-door to allow format-aware applications to create debug symbols
 372 .    while using BFD for everything else.  Currently used by the assembler
 373 .    when creating COFF files.  *}
 374 .  asymbol *  (*_bfd_make_debug_symbol) PARAMS ((
 375 .       bfd *abfd,
 376 .       void *ptr,
 377 .       unsigned long size));
 378 .#define bfd_read_minisymbols(b, d, m, s) \
 379 .  BFD_SEND (b, _read_minisymbols, (b, d, m, s))
 380 .  long  (*_read_minisymbols) PARAMS ((bfd *, boolean, PTR *,
 381 .                                      unsigned int *));
 382 .#define bfd_minisymbol_to_symbol(b, d, m, f) \
 383 .  BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
 384 .  asymbol *(*_minisymbol_to_symbol) PARAMS ((bfd *, boolean, const PTR,
 385 .                                             asymbol *));
 386 .
 387 .  {* Routines for relocs.  *}
 388 .#define BFD_JUMP_TABLE_RELOCS(NAME)\
 389 .CAT(NAME,_get_reloc_upper_bound),\
 390 .CAT(NAME,_canonicalize_reloc),\
 391 .CAT(NAME,_bfd_reloc_type_lookup)
 392 .  long  (*_get_reloc_upper_bound) PARAMS ((bfd *, sec_ptr));
 393 .  long  (*_bfd_canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **,
 394 .                                            struct symbol_cache_entry **));
 395 .  {* See documentation on reloc types.  *}
 396 .  reloc_howto_type *
 397 .       (*reloc_type_lookup) PARAMS ((bfd *abfd,
 398 .                                     bfd_reloc_code_real_type code));
 399 .
 400 .  {* Routines used when writing an object file.  *}
 401 .#define BFD_JUMP_TABLE_WRITE(NAME)\
 402 .CAT(NAME,_set_arch_mach),\
 403 .CAT(NAME,_set_section_contents)
 404 .  boolean    (*_bfd_set_arch_mach) PARAMS ((bfd *, enum bfd_architecture,
 405 .                    unsigned long));
 406 .  boolean       (*_bfd_set_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 407 .                                            file_ptr, bfd_size_type));
 408 .
 409 .  {* Routines used by the linker.  *}
 410 .#define BFD_JUMP_TABLE_LINK(NAME)\
 411 .CAT(NAME,_sizeof_headers),\
 412 .CAT(NAME,_bfd_get_relocated_section_contents),\
 413 .CAT(NAME,_bfd_relax_section),\
 414 .CAT(NAME,_bfd_link_hash_table_create),\
 415 .CAT(NAME,_bfd_link_add_symbols),\
 416 .CAT(NAME,_bfd_final_link),\
 417 .CAT(NAME,_bfd_link_split_section),\
 418 .CAT(NAME,_bfd_gc_sections)
 419 .  int        (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean));
 420 .  bfd_byte * (*_bfd_get_relocated_section_contents) PARAMS ((bfd *,
 421 .                    struct bfd_link_info *, struct bfd_link_order *,
 422 .                    bfd_byte *data, boolean relocateable,
 423 .                    struct symbol_cache_entry **));
 424 .
 425 .  boolean    (*_bfd_relax_section) PARAMS ((bfd *, struct sec *,
 426 .                    struct bfd_link_info *, boolean *again));
 427 .
 428 .  {* Create a hash table for the linker.  Different backends store
 429 .     different information in this table.  *}
 430 .  struct bfd_link_hash_table *(*_bfd_link_hash_table_create) PARAMS ((bfd *));
 431 .
 432 .  {* Add symbols from this object file into the hash table.  *}
 433 .  boolean (*_bfd_link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
 434 .
 435 .  {* Do a link based on the link_order structures attached to each
 436 .     section of the BFD.  *}
 437 .  boolean (*_bfd_final_link) PARAMS ((bfd *, struct bfd_link_info *));
 438 .
 439 .  {* Should this section be split up into smaller pieces during linking.  *}
 440 .  boolean (*_bfd_link_split_section) PARAMS ((bfd *, struct sec *));
 441 .
 442 .  {* Remove sections that are not referenced from the output.  *}
 443 .  boolean (*_bfd_gc_sections) PARAMS ((bfd *, struct bfd_link_info *));
 444 .
 445 .  {* Routines to handle dynamic symbols and relocs.  *}
 446 .#define BFD_JUMP_TABLE_DYNAMIC(NAME)\
 447 .CAT(NAME,_get_dynamic_symtab_upper_bound),\
 448 .CAT(NAME,_canonicalize_dynamic_symtab),\
 449 .CAT(NAME,_get_dynamic_reloc_upper_bound),\
 450 .CAT(NAME,_canonicalize_dynamic_reloc)
 451 .  {* Get the amount of memory required to hold the dynamic symbols. *}
 452 .  long  (*_bfd_get_dynamic_symtab_upper_bound) PARAMS ((bfd *));
 453 .  {* Read in the dynamic symbols.  *}
 454 .  long  (*_bfd_canonicalize_dynamic_symtab)
 455 .    PARAMS ((bfd *, struct symbol_cache_entry **));
 456 .  {* Get the amount of memory required to hold the dynamic relocs.  *}
 457 .  long  (*_bfd_get_dynamic_reloc_upper_bound) PARAMS ((bfd *));
 458 .  {* Read in the dynamic relocs.  *}
 459 .  long  (*_bfd_canonicalize_dynamic_reloc)
 460 .    PARAMS ((bfd *, arelent **, struct symbol_cache_entry **));
 461 .
 462
 463 A pointer to an alternative bfd_target in case the current one is not
 464 satisfactory.  This can happen when the target cpu supports both big
 465 and little endian code, and target chosen by the linker has the wrong
 466 endianness.  The function open_output() in ld/ldlang.c uses this field
 467 to find an alternative output format that is suitable.
 468
 469 . {* Opposite endian version of this target.  *}
 470 . const struct bfd_target * alternative_target;
 471 .
 472
 473 Data for use by back-end routines, which isn't generic enough to belong
 474 in this structure.
 475
 476 . PTR backend_data;
 477 .
 478 .} bfd_target;
 479
 480 */
 481
 482 /* All known xvecs (even those that don't compile on all systems).
 483    Alphabetized for easy reference.
 484    They are listed a second time below, since
 485    we can't intermix extern's and initializers.  */
 486 extern const bfd_target a29kcoff_big_vec;
 487 extern const bfd_target a_out_adobe_vec;
 488 extern const bfd_target aout_arm_big_vec;
 489 extern const bfd_target aout_arm_little_vec;
 490 extern const bfd_target aout_mips_big_vec;
 491 extern const bfd_target aout_mips_little_vec;
 492 extern const bfd_target aout0_big_vec;
 493 extern const bfd_target apollocoff_vec;
 494 extern const bfd_target armcoff_little_vec;
 495 extern const bfd_target armcoff_big_vec;
 496 extern const bfd_target armnetbsd_vec;
 497 extern const bfd_target armpe_little_vec;
 498 extern const bfd_target armpe_big_vec;
 499 extern const bfd_target armpei_little_vec;
 500 extern const bfd_target armpei_big_vec;
 501 extern const bfd_target arm_epoc_pe_little_vec;
 502 extern const bfd_target arm_epoc_pe_big_vec;
 503 extern const bfd_target arm_epoc_pei_little_vec;
 504 extern const bfd_target arm_epoc_pei_big_vec;
 505 extern const bfd_target b_out_vec_big_host;
 506 extern const bfd_target b_out_vec_little_host;
 507 extern const bfd_target bfd_efi_app_ia32_vec;
 508 extern const bfd_target bfd_efi_app_ia64_vec;
 509 extern const bfd_target bfd_elf64_alpha_vec;
 510 extern const bfd_target bfd_elf64_hppa_vec;
 511 extern const bfd_target bfd_elf64_ia64_little_vec;
 512 extern const bfd_target bfd_elf64_ia64_big_vec;
 513 extern const bfd_target bfd_elf32_ia64_big_vec;
 514 extern const bfd_target bfd_elf32_avr_vec;
 515 extern const bfd_target bfd_elf32_bigarc_vec;
 516 extern const bfd_target bfd_elf32_bigarm_vec;
 517 extern const bfd_target bfd_elf32_bigarm_oabi_vec;
 518 extern const bfd_target bfd_elf32_littlearc_vec;
 519 extern const bfd_target bfd_elf32_littlearm_vec;
 520 extern const bfd_target bfd_elf32_littlearm_oabi_vec;
 521 extern const bfd_target bfd_elf32_big_generic_vec;
 522 extern const bfd_target bfd_elf32_bigmips_vec;
 523 extern const bfd_target bfd_elf64_bigmips_vec;
 524 extern const bfd_target bfd_elf32_cris_vec;
 525 extern const bfd_target bfd_elf32_us_cris_vec;
 526 extern const bfd_target bfd_elf32_d10v_vec;
 527 extern const bfd_target bfd_elf32_d30v_vec;
 528 extern const bfd_target bfd_elf32_hppa_vec;
 529 extern const bfd_target bfd_elf32_i370_vec;
 530 extern const bfd_target bfd_elf32_i386_vec;
 531 extern const bfd_target bfd_elf32_i860_vec;
 532 extern const bfd_target bfd_elf32_i860_little_vec;
 533 extern const bfd_target bfd_elf32_i960_vec;
 534 extern const bfd_target bfd_elf32_little_generic_vec;
 535 extern const bfd_target bfd_elf32_littlemips_vec;
 536 extern const bfd_target bfd_elf64_littlemips_vec;
 537 extern const bfd_target bfd_elf32_m32r_vec;
 538 extern const bfd_target bfd_elf32_m68hc11_vec;
 539 extern const bfd_target bfd_elf32_m68hc12_vec;
 540 extern const bfd_target bfd_elf32_m68k_vec;
 541 extern const bfd_target bfd_elf32_m88k_vec;
 542 extern const bfd_target bfd_elf32_mn10200_vec;
 543 extern const bfd_target bfd_elf32_mn10300_vec;
 544 extern const bfd_target bfd_elf32_pj_vec;
 545 extern const bfd_target bfd_elf32_pjl_vec;
 546 extern const bfd_target bfd_elf32_powerpc_vec;
 547 extern const bfd_target bfd_elf32_powerpcle_vec;
 548 extern const bfd_target bfd_elf32_sh_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_shblin_vec;
 552 extern const bfd_target bfd_elf32_sparc_vec;
 553 extern const bfd_target bfd_elf64_x86_64_vec;
 554 extern const bfd_target bfd_elf32_tradbigmips_vec;
 555 extern const bfd_target bfd_elf32_tradlittlemips_vec;
 556 extern const bfd_target bfd_elf32_v850_vec;
 557 extern const bfd_target bfd_elf32_fr30_vec;
 558 extern const bfd_target bfd_elf32_mcore_big_vec;
 559 extern const bfd_target bfd_elf32_mcore_little_vec;
 560 extern const bfd_target bfd_elf64_big_generic_vec;
 561 extern const bfd_target bfd_elf64_little_generic_vec;
 562 extern const bfd_target bfd_elf64_sparc_vec;
 563 extern const bfd_target cris_aout_vec;
 564 extern const bfd_target demo_64_vec;
 565 extern const bfd_target ecoff_big_vec;
 566 extern const bfd_target ecoff_little_vec;
 567 extern const bfd_target ecoff_biglittle_vec;
 568 extern const bfd_target ecoffalpha_little_vec;
 569 extern const bfd_target h8300coff_vec;
 570 extern const bfd_target h8500coff_vec;
 571 extern const bfd_target host_aout_vec;
 572 extern const bfd_target hp300bsd_vec;
 573 extern const bfd_target hp300hpux_vec;
 574 extern const bfd_target som_vec;
 575 extern const bfd_target i386aout_vec;
 576 extern const bfd_target i386bsd_vec;
 577 extern const bfd_target i386dynix_vec;
 578 extern const bfd_target i386freebsd_vec;
 579 extern const bfd_target i386os9k_vec;
 580 extern const bfd_target i386coff_vec;
 581 extern const bfd_target bfd_powerpc_pe_vec;
 582 extern const bfd_target bfd_powerpcle_pe_vec;
 583 extern const bfd_target bfd_powerpc_pei_vec;
 584 extern const bfd_target bfd_powerpcle_pei_vec;
 585 extern const bfd_target i386pe_vec;
 586 extern const bfd_target i386pei_vec;
 587 extern const bfd_target go32coff_vec;
 588 extern const bfd_target go32stubbedcoff_vec;
 589 extern const bfd_target i386linux_vec;
 590 extern const bfd_target i386lynx_aout_vec;
 591 extern const bfd_target i386lynx_coff_vec;
 592 extern const bfd_target i386mach3_vec;
 593 extern const bfd_target i386msdos_vec;
 594 extern const bfd_target i386netbsd_vec;
 595 extern const bfd_target i860coff_vec;
 596 extern const bfd_target icoff_big_vec;
 597 extern const bfd_target icoff_little_vec;
 598 extern const bfd_target ieee_vec;
 599 extern const bfd_target m68kaux_coff_vec;
 600 extern const bfd_target m68kcoff_vec;
 601 extern const bfd_target m68kcoffun_vec;
 602 extern const bfd_target m68klinux_vec;
 603 extern const bfd_target m68klynx_aout_vec;
 604 extern const bfd_target m68klynx_coff_vec;
 605 extern const bfd_target m68knetbsd_vec;
 606 extern const bfd_target m68ksysvcoff_vec;
 607 extern const bfd_target m68k4knetbsd_vec;
 608 extern const bfd_target m88kbcs_vec;
 609 extern const bfd_target m88kmach3_vec;
 610 extern const bfd_target mipslpe_vec;
 611 extern const bfd_target mipslpei_vec;
 612 extern const bfd_target mcore_pe_big_vec;
 613 extern const bfd_target mcore_pe_little_vec;
 614 extern const bfd_target mcore_pei_big_vec;
 615 extern const bfd_target mcore_pei_little_vec;
 616 extern const bfd_target newsos3_vec;
 617 extern const bfd_target nlm32_i386_vec;
 618 extern const bfd_target nlm32_sparc_vec;
 619 extern const bfd_target nlm32_alpha_vec;
 620 extern const bfd_target nlm32_powerpc_vec;
 621 extern const bfd_target pc532netbsd_vec;
 622 extern const bfd_target oasys_vec;
 623 extern const bfd_target pc532machaout_vec;
 624 extern const bfd_target ppcboot_vec;
 625 extern const bfd_target riscix_vec;
 626 extern const bfd_target pmac_xcoff_vec;
 627 extern const bfd_target rs6000coff_vec;
 628 extern const bfd_target rs6000coff64_vec;
 629 extern const bfd_target shcoff_vec;
 630 extern const bfd_target shlcoff_vec;
 631 extern const bfd_target shcoff_small_vec;
 632 extern const bfd_target shlcoff_small_vec;
 633 extern const bfd_target shlpe_vec;
 634 extern const bfd_target shlpei_vec;
 635 extern const bfd_target sparcle_aout_vec;
 636 extern const bfd_target sparclinux_vec;
 637 extern const bfd_target sparclynx_aout_vec;
 638 extern const bfd_target sparclynx_coff_vec;
 639 extern const bfd_target sparcnetbsd_vec;
 640 extern const bfd_target sparccoff_vec;
 641 extern const bfd_target sunos_big_vec;
 642 extern const bfd_target tekhex_vec;
 643 extern const bfd_target tic30_aout_vec;
 644 extern const bfd_target tic30_coff_vec;
 645 extern const bfd_target tic54x_coff0_vec;
 646 extern const bfd_target tic54x_coff0_beh_vec;
 647 extern const bfd_target tic54x_coff1_vec;
 648 extern const bfd_target tic54x_coff1_beh_vec;
 649 extern const bfd_target tic54x_coff2_vec;
 650 extern const bfd_target tic54x_coff2_beh_vec;
 651 extern const bfd_target tic80coff_vec;
 652 extern const bfd_target vaxnetbsd_vec;
 653 extern const bfd_target versados_vec;
 654 extern const bfd_target vms_alpha_vec;
 655 extern const bfd_target vms_vax_vec;
 656 extern const bfd_target we32kcoff_vec;
 657 extern const bfd_target w65_vec;
 658 extern const bfd_target z8kcoff_vec;
 659
 660 /* srec is always included.  */
 661 extern const bfd_target srec_vec;
 662 extern const bfd_target symbolsrec_vec;
 663
 664 /* binary is always included.  */
 665 extern const bfd_target binary_vec;
 666
 667 /* ihex is always included.  */
 668 extern const bfd_target ihex_vec;
 669
 670 /* All of the xvecs for core files.  */
 671 extern const bfd_target aix386_core_vec;
 672 extern const bfd_target cisco_core_big_vec;
 673 extern const bfd_target cisco_core_little_vec;
 674 extern const bfd_target hpux_core_vec;
 675 extern const bfd_target hppabsd_core_vec;
 676 extern const bfd_target irix_core_vec;
 677 extern const bfd_target netbsd_core_vec;
 678 extern const bfd_target osf_core_vec;
 679 extern const bfd_target sco5_core_vec;
 680 extern const bfd_target trad_core_vec;
 681 extern const bfd_target ptrace_core_vec;
 682
 683 const bfd_target * const bfd_target_vector[] = {
 684
 685 #ifdef SELECT_VECS
 686
 687         SELECT_VECS,
 688
 689 #else /* not SELECT_VECS */
 690
 691 #ifdef DEFAULT_VECTOR
 692         &DEFAULT_VECTOR,
 693 #endif
 694         /* This list is alphabetized to make it easy to compare
 695            with other vector lists -- the decls above and
 696            the case statement in configure.in.
 697            Vectors that don't compile on all systems, or aren't finished,
 698            should have an entry here with #if 0 around it, to show that
 699            it wasn't omitted by mistake.  */
 700         &a29kcoff_big_vec,
 701         &a_out_adobe_vec,
 702 #if 0                           /* No one seems to use this.  */
 703         &aout_mips_big_vec,
 704 #endif
 705         &aout_mips_little_vec,
 706         &b_out_vec_big_host,
 707         &b_out_vec_little_host,
 708
 709         &bfd_efi_app_ia32_vec,
 710 #ifdef BFD64
 711         &bfd_efi_app_ia64_vec,
 712 #endif
 713
 714         /* This, and other vectors, may not be used in any *.mt configuration.
 715            But that does not mean they are unnecessary.  If configured with
 716            --enable-targets=all, objdump or gdb should be able to examine
 717            the file even if we don't recognize the machine type.  */
 718         &bfd_elf32_big_generic_vec,
 719 #ifdef BFD64
 720         &bfd_elf64_alpha_vec,
 721         &bfd_elf64_hppa_vec,
 722         &bfd_elf64_ia64_little_vec,
 723         &bfd_elf64_ia64_big_vec,
 724 #endif
 725         &bfd_elf32_avr_vec,
 726         &bfd_elf32_bigarc_vec,
 727         &bfd_elf32_bigarm_vec,
 728         &bfd_elf32_bigarm_oabi_vec,
 729         &bfd_elf32_bigmips_vec,
 730 #ifdef BFD64
 731         &bfd_elf64_bigmips_vec,
 732 #endif
 733         &bfd_elf32_cris_vec,
 734         &bfd_elf32_us_cris_vec,
 735         &bfd_elf32_d10v_vec,
 736         &bfd_elf32_d30v_vec,
 737         &bfd_elf32_hppa_vec,
 738         &bfd_elf32_i370_vec,
 739         &bfd_elf32_i386_vec,
 740 #ifdef BFD64
 741         &bfd_elf64_x86_64_vec,
 742 #endif
 743         &bfd_elf32_i860_vec,
 744         &bfd_elf32_i860_little_vec,
 745         &bfd_elf32_i960_vec,
 746         &bfd_elf32_little_generic_vec,
 747         &bfd_elf32_littlearc_vec,
 748         &bfd_elf32_littlearm_vec,
 749         &bfd_elf32_littlearm_oabi_vec,
 750         &bfd_elf32_littlemips_vec,
 751 #ifdef BFD64
 752         &bfd_elf64_littlemips_vec,
 753 #endif
 754         &bfd_elf32_m32r_vec,
 755         &bfd_elf32_mn10200_vec,
 756         &bfd_elf32_mn10300_vec,
 757         &bfd_elf32_m68hc11_vec,
 758         &bfd_elf32_m68hc12_vec,
 759         &bfd_elf32_m68k_vec,
 760         &bfd_elf32_m88k_vec,
 761         &bfd_elf32_sparc_vec,
 762         &bfd_elf32_pj_vec,
 763         &bfd_elf32_pjl_vec,
 764         &bfd_elf32_powerpc_vec,
 765         &bfd_elf32_powerpcle_vec,
 766         &bfd_elf32_v850_vec,
 767         &bfd_elf32_fr30_vec,
 768         &bfd_elf32_mcore_big_vec,
 769         &bfd_elf32_mcore_little_vec,
 770         &bfd_elf32_tradbigmips_vec,
 771         &bfd_elf32_tradlittlemips_vec,
 772 #ifdef BFD64                    /* No one seems to use this.  */
 773         &bfd_elf64_big_generic_vec,
 774         &bfd_elf64_little_generic_vec,
 775 #endif
 776 #if 0
 777         &bfd_elf64_sparc_vec,
 778 #endif
 779         /* We don't include cisco_core_*_vec.  Although it has a magic number,
 780            the magic number isn't at the beginning of the file, and thus
 781            might spuriously match other kinds of files.  */
 782
 783         &cris_aout_vec,
 784 #ifdef BFD64
 785         &demo_64_vec,   /* Only compiled if host has long-long support */
 786 #endif
 787         &ecoff_big_vec,
 788         &ecoff_little_vec,
 789         &ecoff_biglittle_vec,
 790 #ifdef BFD64
 791         &ecoffalpha_little_vec,
 792 #endif
 793         &h8300coff_vec,
 794         &h8500coff_vec,
 795 #if 0
 796         /* Since a.out files lack decent magic numbers, no way to recognize
 797            which kind of a.out file it is.  */
 798         &host_aout_vec,
 799 #endif
 800 #if 0                           /* Clashes with sunos_big_vec magic no.  */
 801         &hp300bsd_vec,
 802 #endif
 803         &hp300hpux_vec,
 804 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
 805         &som_vec,
 806 #endif
 807         &i386aout_vec,
 808         &i386bsd_vec,
 809         &i386coff_vec,
 810         &i386freebsd_vec,
 811         &i860coff_vec,
 812         &bfd_powerpc_pe_vec,
 813         &bfd_powerpcle_pe_vec,
 814         &bfd_powerpc_pei_vec,
 815         &bfd_powerpcle_pei_vec,
 816         &go32coff_vec,
 817         &go32stubbedcoff_vec,
 818 #if 0
 819         /* Since a.out files lack decent magic numbers, no way to recognize
 820            which kind of a.out file it is.  */
 821         &i386linux_vec,
 822 #endif
 823         &i386lynx_aout_vec,
 824         &i386lynx_coff_vec,
 825 #if 0
 826         /* No distinguishing features for Mach 3 executables.  */
 827         &i386mach3_vec,
 828 #endif
 829         &i386msdos_vec,
 830         &i386netbsd_vec,
 831         &i386os9k_vec,
 832         &i386pe_vec,
 833         &i386pei_vec,
 834         &armcoff_little_vec,
 835         &armcoff_big_vec,
 836         &armnetbsd_vec,
 837         &armpe_little_vec,
 838         &armpe_big_vec,
 839         &armpei_little_vec,
 840         &armpei_big_vec,
 841         &arm_epoc_pe_little_vec,
 842         &arm_epoc_pe_big_vec,
 843         &arm_epoc_pei_little_vec,
 844         &arm_epoc_pei_big_vec,
 845         &icoff_big_vec,
 846         &icoff_little_vec,
 847         &ieee_vec,
 848         &m68kcoff_vec,
 849         &m68kcoffun_vec,
 850 #if 0
 851         /* Since a.out files lack decent magic numbers, no way to recognize
 852            which kind of a.out file it is.  */
 853         &m68klinux_vec,
 854 #endif
 855         &m68klynx_aout_vec,
 856         &m68klynx_coff_vec,
 857         &m68knetbsd_vec,
 858         &m68ksysvcoff_vec,
 859         &m88kbcs_vec,
 860         &m88kmach3_vec,
 861         &mcore_pe_big_vec,
 862         &mcore_pe_little_vec,
 863         &mcore_pei_big_vec,
 864         &mcore_pei_little_vec,
 865         &newsos3_vec,
 866         &nlm32_i386_vec,
 867         &nlm32_sparc_vec,
 868 #ifdef BFD64
 869         &nlm32_alpha_vec,
 870 #endif
 871         &pc532netbsd_vec,
 872 #if 0
 873         /* We have no oasys tools anymore, so we can't test any of this
 874            anymore. If you want to test the stuff yourself, go ahead...
 875            steve@cygnus.com
 876            Worse, since there is no magic number for archives, there
 877            can be annoying target mis-matches.  */
 878         &oasys_vec,
 879 #endif
 880         &pc532machaout_vec,
 881 #if 0
 882         /* We have no way of distinguishing these from other a.out variants */
 883         &aout_arm_big_vec,
 884         &aout_arm_little_vec,
 885         &riscix_vec,
 886 #endif
 887 #if 0
 888         /* This has the same magic number as RS/6000.  */
 889         &pmac_xcoff_vec,
 890 #endif
 891         &rs6000coff_vec,
 892 #ifdef BFD64
 893         &rs6000coff64_vec,
 894 #endif
 895         &ppcboot_vec,
 896         &shcoff_vec,
 897         &shlcoff_vec,
 898         &shcoff_small_vec,
 899         &shlcoff_small_vec,
 900         &sparcle_aout_vec,
 901         &sparclinux_vec,
 902         &sparclynx_aout_vec,
 903         &sparclynx_coff_vec,
 904         &sparcnetbsd_vec,
 905         &sunos_big_vec,
 906         &aout0_big_vec,
 907         &tic30_aout_vec,
 908         &tic30_coff_vec,
 909         &tic54x_coff0_vec,
 910         &tic54x_coff0_beh_vec,
 911         &tic54x_coff1_vec,
 912         &tic54x_coff1_beh_vec,
 913         &tic54x_coff2_vec,
 914         &tic54x_coff2_beh_vec,
 915         &tic80coff_vec,
 916         &vaxnetbsd_vec,
 917         &versados_vec,
 918 #ifdef BFD64
 919         &vms_alpha_vec,
 920 #endif
 921         &vms_vax_vec,
 922         &we32kcoff_vec,
 923         &z8kcoff_vec,
 924
 925 #endif /* not SELECT_VECS */
 926
 927 /* Always support S-records, for convenience.  */
 928         &srec_vec,
 929         &symbolsrec_vec,
 930 /* And tekhex */
 931         &tekhex_vec,
 932 /* Likewise for binary output.  */
 933         &binary_vec,
 934 /* Likewise for ihex.  */
 935         &ihex_vec,
 936
 937 /* Add any required traditional-core-file-handler.  */
 938
 939 #ifdef AIX386_CORE
 940         &aix386_core_vec,
 941 #endif
 942 #ifdef HPUX_CORE
 943         &hpux_core_vec,
 944 #endif
 945 #ifdef HPPABSD_CORE
 946         &hppabsd_core_vec,
 947 #endif
 948 #ifdef IRIX_CORE
 949         &irix_core_vec,
 950 #endif
 951 #ifdef NETBSD_CORE
 952         &netbsd_core_vec,
 953 #endif
 954 #ifdef OSF_CORE
 955         &osf_core_vec,
 956 #endif
 957 #ifdef SCO5_CORE
 958         &sco5_core_vec,
 959 #endif
 960 #ifdef  TRAD_CORE
 961         &trad_core_vec,
 962 #endif
 963
 964 #ifdef  PTRACE_CORE
 965         &ptrace_core_vec,
 966 #endif
 967
 968         NULL /* end of list marker */
 969 };
 970
 971 /* bfd_default_vector[0] contains either the address of the default vector,
 972    if there is one, or zero if there isn't.  */
 973
 974 const bfd_target *bfd_default_vector[] = {
 975 #ifdef DEFAULT_VECTOR
 976         &DEFAULT_VECTOR,
 977 #endif
 978         NULL
 979 };
 980
 981 /* When there is an ambiguous match, bfd_check_format_matches puts the
 982    names of the matching targets in an array.  This variable is the maximum
 983    number of entries that the array could possibly need.  */
 984 const size_t _bfd_target_vector_entries = sizeof (bfd_target_vector)/sizeof (*bfd_target_vector);
 985 \f
 986 /* This array maps configuration triplets onto BFD vectors.  */
 987
 988 struct targmatch
 989 {
 990   /* The configuration triplet.  */
 991   const char *triplet;
 992   /* The BFD vector.  If this is NULL, then the vector is found by
 993      searching forward for the next structure with a non NULL vector
 994      field.  */
 995   const bfd_target *vector;
 996 };
 997
 998 /* targmatch.h is built by Makefile out of config.bfd.  */
 999 static const struct targmatch bfd_target_match[] = {
1000 #include "targmatch.h"
1001   { NULL, NULL }
1002 };
1003
1004 static const bfd_target *find_target PARAMS ((const char *));
1005
1006 /* Find a target vector, given a name or configuration triplet.  */
1007
1008 static const bfd_target *
1009 find_target (name)
1010      const char *name;
1011 {
1012   const bfd_target * const *target;
1013   const struct targmatch *match;
1014
1015   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1016     if (strcmp (name, (*target)->name) == 0)
1017       return *target;
1018
1019   /* If we couldn't match on the exact name, try matching on the
1020      configuration triplet.  FIXME: We should run the triplet through
1021      config.sub first, but that is hard.  */
1022   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1023     {
1024       if (fnmatch (match->triplet, name, 0) == 0)
1025         {
1026           while (match->vector == NULL)
1027             ++match;
1028           return match->vector;
1029           break;
1030         }
1031     }
1032
1033   bfd_set_error (bfd_error_invalid_target);
1034   return NULL;
1035 }
1036
1037 /*
1038 FUNCTION
1039         bfd_set_default_target
1040
1041 SYNOPSIS
1042         boolean bfd_set_default_target (const char *name);
1043
1044 DESCRIPTION
1045         Set the default target vector to use when recognizing a BFD.
1046         This takes the name of the target, which may be a BFD target
1047         name or a configuration triplet.
1048 */
1049
1050 boolean
1051 bfd_set_default_target (name)
1052      const char *name;
1053 {
1054   const bfd_target *target;
1055
1056   if (bfd_default_vector[0] != NULL
1057       && strcmp (name, bfd_default_vector[0]->name) == 0)
1058     return true;
1059
1060   target = find_target (name);
1061   if (target == NULL)
1062     return false;
1063
1064   bfd_default_vector[0] = target;
1065   return true;
1066 }
1067
1068 /*
1069 FUNCTION
1070         bfd_find_target
1071
1072 SYNOPSIS
1073         const bfd_target *bfd_find_target(CONST char *target_name, bfd *abfd);
1074
1075 DESCRIPTION
1076         Return a pointer to the transfer vector for the object target
1077         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
1078         one in the environment variable <<GNUTARGET>>; if that is null or not
1079         defined, then choose the first entry in the target list.
1080         Passing in the string "default" or setting the environment
1081         variable to "default" will cause the first entry in the target
1082         list to be returned, and "target_defaulted" will be set in the
1083         BFD.  This causes <<bfd_check_format>> to loop over all the
1084         targets to find the one that matches the file being read.
1085 */
1086
1087 const bfd_target *
1088 bfd_find_target (target_name, abfd)
1089      const char *target_name;
1090      bfd *abfd;
1091 {
1092   const char *targname;
1093   const bfd_target *target;
1094
1095   if (target_name != NULL)
1096     targname = target_name;
1097   else
1098     targname = getenv ("GNUTARGET");
1099
1100   /* This is safe; the vector cannot be null */
1101   if (targname == NULL || strcmp (targname, "default") == 0)
1102     {
1103       abfd->target_defaulted = true;
1104       if (bfd_default_vector[0] != NULL)
1105         abfd->xvec = bfd_default_vector[0];
1106       else
1107         abfd->xvec = bfd_target_vector[0];
1108       return abfd->xvec;
1109     }
1110
1111   abfd->target_defaulted = false;
1112
1113   target = find_target (targname);
1114   if (target == NULL)
1115     return NULL;
1116
1117   abfd->xvec = target;
1118   return target;
1119 }
1120
1121 /*
1122 FUNCTION
1123         bfd_target_list
1124
1125 SYNOPSIS
1126         const char **bfd_target_list(void);
1127
1128 DESCRIPTION
1129         Return a freshly malloced NULL-terminated
1130         vector of the names of all the valid BFD targets. Do not
1131         modify the names.
1132
1133 */
1134
1135 const char **
1136 bfd_target_list ()
1137 {
1138   int vec_length= 0;
1139 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1140   /* The native compiler on the HP9000/700 has a bug which causes it
1141      to loop endlessly when compiling this file.  This avoids it.  */
1142   volatile
1143 #endif
1144     const bfd_target * const *target;
1145   CONST  char **name_list, **name_ptr;
1146
1147   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1148     vec_length++;
1149
1150   name_ptr = name_list = (CONST char **)
1151     bfd_zmalloc ((vec_length + 1) * sizeof (char **));
1152
1153   if (name_list == NULL)
1154     return NULL;
1155
1156   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1157     *(name_ptr++) = (*target)->name;
1158
1159   return name_list;
1160 }
1161
1162 /*
1163 FUNCTION
1164         bfd_seach_for_target
1165
1166 SYNOPSIS
1167         const bfd_target * bfd_search_for_target (int (* search_func) (const bfd_target *, void *), void *);
1168
1169 DESCRIPTION
1170         Return a pointer to the first transfer vector in the list of
1171         transfer vectors maintained by BFD that produces a non-zero
1172         result when passed to the function @var{search_func}.  The
1173         parameter @var{data} is passed, unexamined, to the search
1174         function.
1175 */
1176
1177 const bfd_target *
1178 bfd_search_for_target (search_func, data)
1179      int (* search_func) PARAMS ((const bfd_target * target, void * data));
1180      void * data;
1181 {
1182   const bfd_target * const * target;
1183
1184   for (target = bfd_target_vector; * target != NULL; target ++)
1185     if (search_func (* target, data))
1186       return * target;
1187
1188   return NULL;
1189 }