bfd/targets.c

   1 /* Generic target-file-type support for the BFD library.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002
   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 .  bfd_target_mmo_flavour
 158 .};
 159 .
 160 .enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
 161 .
 162 .{* Forward declaration.  *}
 163 .typedef struct bfd_link_info _bfd_link_info;
 164 .
 165 .typedef struct bfd_target
 166 .{
 167
 168 Identifies the kind of target, e.g., SunOS4, Ultrix, etc.
 169
 170 .  char *name;
 171
 172 The "flavour" of a back end is a general indication about the contents
 173 of a file.
 174
 175 .  enum bfd_flavour flavour;
 176
 177 The order of bytes within the data area of a file.
 178
 179 .  enum bfd_endian byteorder;
 180
 181 The order of bytes within the header parts of a file.
 182
 183 .  enum bfd_endian header_byteorder;
 184
 185 A mask of all the flags which an executable may have set -
 186 from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.
 187
 188 .  flagword object_flags;
 189
 190 A mask of all the flags which a section may have set - from
 191 the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.
 192
 193 .  flagword section_flags;
 194
 195 The character normally found at the front of a symbol
 196 (if any), perhaps `_'.
 197
 198 .  char symbol_leading_char;
 199
 200 The pad character for file names within an archive header.
 201
 202 .  char ar_pad_char;
 203
 204 The maximum number of characters in an archive header.
 205
 206 .  unsigned short ar_max_namelen;
 207
 208 Entries for byte swapping for data. These are different from the other
 209 entry points, since they don't take a BFD asthe first argument.
 210 Certain other handlers could do the same.
 211
 212 .  bfd_vma        (*bfd_getx64) PARAMS ((const bfd_byte *));
 213 .  bfd_signed_vma (*bfd_getx_signed_64) PARAMS ((const bfd_byte *));
 214 .  void           (*bfd_putx64) PARAMS ((bfd_vma, bfd_byte *));
 215 .  bfd_vma        (*bfd_getx32) PARAMS ((const bfd_byte *));
 216 .  bfd_signed_vma (*bfd_getx_signed_32) PARAMS ((const bfd_byte *));
 217 .  void           (*bfd_putx32) PARAMS ((bfd_vma, bfd_byte *));
 218 .  bfd_vma        (*bfd_getx16) PARAMS ((const bfd_byte *));
 219 .  bfd_signed_vma (*bfd_getx_signed_16) PARAMS ((const bfd_byte *));
 220 .  void           (*bfd_putx16) PARAMS ((bfd_vma, bfd_byte *));
 221
 222 Byte swapping for the headers
 223
 224 .  bfd_vma        (*bfd_h_getx64) PARAMS ((const bfd_byte *));
 225 .  bfd_signed_vma (*bfd_h_getx_signed_64) PARAMS ((const bfd_byte *));
 226 .  void           (*bfd_h_putx64) PARAMS ((bfd_vma, bfd_byte *));
 227 .  bfd_vma        (*bfd_h_getx32) PARAMS ((const bfd_byte *));
 228 .  bfd_signed_vma (*bfd_h_getx_signed_32) PARAMS ((const bfd_byte *));
 229 .  void           (*bfd_h_putx32) PARAMS ((bfd_vma, bfd_byte *));
 230 .  bfd_vma        (*bfd_h_getx16) PARAMS ((const bfd_byte *));
 231 .  bfd_signed_vma (*bfd_h_getx_signed_16) PARAMS ((const bfd_byte *));
 232 .  void           (*bfd_h_putx16) PARAMS ((bfd_vma, bfd_byte *));
 233
 234 Format dependent routines: these are vectors of entry points
 235 within the target vector structure, one for each format to check.
 236
 237 Check the format of a file being read.  Return a <<bfd_target *>> or zero.
 238
 239 .  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) PARAMS ((bfd *));
 240
 241 Set the format of a file being written.
 242
 243 .  boolean  (*_bfd_set_format[bfd_type_end]) PARAMS ((bfd *));
 244
 245 Write cached information into a file being written, at <<bfd_close>>.
 246
 247 .  boolean  (*_bfd_write_contents[bfd_type_end]) PARAMS ((bfd *));
 248
 249 The general target vector.  These vectors are initialized using the
 250 BFD_JUMP_TABLE macros.
 251
 252 .
 253 .  {* Generic entry points.  *}
 254 Do not "beautify" the CONCAT* macro args.  Traditional C will not
 255 remove whitespace added here, and thus will fail to concatenate
 256 the tokens.
 257 .#define BFD_JUMP_TABLE_GENERIC(NAME) \
 258 .CONCAT2 (NAME,_close_and_cleanup), \
 259 .CONCAT2 (NAME,_bfd_free_cached_info), \
 260 .CONCAT2 (NAME,_new_section_hook), \
 261 .CONCAT2 (NAME,_get_section_contents), \
 262 .CONCAT2 (NAME,_get_section_contents_in_window)
 263 .
 264 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 265 .  boolean  (*_close_and_cleanup) PARAMS ((bfd *));
 266 .  {* Ask the BFD to free all cached information.  *}
 267 .  boolean  (*_bfd_free_cached_info) PARAMS ((bfd *));
 268 .  {* Called when a new section is created.  *}
 269 .  boolean  (*_new_section_hook) PARAMS ((bfd *, sec_ptr));
 270 .  {* Read the contents of a section.  *}
 271 .  boolean  (*_bfd_get_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 272 .                                                 file_ptr, bfd_size_type));
 273 .  boolean  (*_bfd_get_section_contents_in_window)
 274 .    PARAMS ((bfd *, sec_ptr, bfd_window *, file_ptr, bfd_size_type));
 275 .
 276 .  {* Entry points to copy private data.  *}
 277 .#define BFD_JUMP_TABLE_COPY(NAME) \
 278 .CONCAT2 (NAME,_bfd_copy_private_bfd_data), \
 279 .CONCAT2 (NAME,_bfd_merge_private_bfd_data), \
 280 .CONCAT2 (NAME,_bfd_copy_private_section_data), \
 281 .CONCAT2 (NAME,_bfd_copy_private_symbol_data), \
 282 .CONCAT2 (NAME,_bfd_set_private_flags), \
 283 .CONCAT2 (NAME,_bfd_print_private_bfd_data) \
 284 .  {* Called to copy BFD general private data from one object file
 285 .     to another.  *}
 286 .  boolean  (*_bfd_copy_private_bfd_data) PARAMS ((bfd *, bfd *));
 287 .  {* Called to merge BFD general private data from one object file
 288 .     to a common output file when linking.  *}
 289 .  boolean  (*_bfd_merge_private_bfd_data) PARAMS ((bfd *, bfd *));
 290 .  {* Called to copy BFD private section data from one object file
 291 .     to another.  *}
 292 .  boolean  (*_bfd_copy_private_section_data) PARAMS ((bfd *, sec_ptr,
 293 .                                                      bfd *, sec_ptr));
 294 .  {* Called to copy BFD private symbol data from one symbol
 295 .     to another.  *}
 296 .  boolean  (*_bfd_copy_private_symbol_data) PARAMS ((bfd *, asymbol *,
 297 .                                                     bfd *, asymbol *));
 298 .  {* Called to set private backend flags *}
 299 .  boolean  (*_bfd_set_private_flags) PARAMS ((bfd *, flagword));
 300 .
 301 .  {* Called to print private BFD data *}
 302 .  boolean  (*_bfd_print_private_bfd_data) PARAMS ((bfd *, PTR));
 303 .
 304 .  {* Core file entry points.  *}
 305 .#define BFD_JUMP_TABLE_CORE(NAME) \
 306 .CONCAT2 (NAME,_core_file_failing_command), \
 307 .CONCAT2 (NAME,_core_file_failing_signal), \
 308 .CONCAT2 (NAME,_core_file_matches_executable_p)
 309 .  char *   (*_core_file_failing_command) PARAMS ((bfd *));
 310 .  int      (*_core_file_failing_signal) PARAMS ((bfd *));
 311 .  boolean  (*_core_file_matches_executable_p) PARAMS ((bfd *, bfd *));
 312 .
 313 .  {* Archive entry points.  *}
 314 .#define BFD_JUMP_TABLE_ARCHIVE(NAME) \
 315 .CONCAT2 (NAME,_slurp_armap), \
 316 .CONCAT2 (NAME,_slurp_extended_name_table), \
 317 .CONCAT2 (NAME,_construct_extended_name_table), \
 318 .CONCAT2 (NAME,_truncate_arname), \
 319 .CONCAT2 (NAME,_write_armap), \
 320 .CONCAT2 (NAME,_read_ar_hdr), \
 321 .CONCAT2 (NAME,_openr_next_archived_file), \
 322 .CONCAT2 (NAME,_get_elt_at_index), \
 323 .CONCAT2 (NAME,_generic_stat_arch_elt), \
 324 .CONCAT2 (NAME,_update_armap_timestamp)
 325 .  boolean  (*_bfd_slurp_armap) PARAMS ((bfd *));
 326 .  boolean  (*_bfd_slurp_extended_name_table) PARAMS ((bfd *));
 327 .  boolean  (*_bfd_construct_extended_name_table)
 328 .    PARAMS ((bfd *, char **, bfd_size_type *, const char **));
 329 .  void     (*_bfd_truncate_arname) PARAMS ((bfd *, const char *, char *));
 330 .  boolean  (*write_armap)
 331 .    PARAMS ((bfd *, unsigned int, struct orl *, unsigned int, int));
 332 .  PTR      (*_bfd_read_ar_hdr_fn) PARAMS ((bfd *));
 333 .  bfd *    (*openr_next_archived_file) PARAMS ((bfd *, bfd *));
 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 .CONCAT2 (NAME,_get_symtab_upper_bound), \
 342 .CONCAT2 (NAME,_get_symtab), \
 343 .CONCAT2 (NAME,_make_empty_symbol), \
 344 .CONCAT2 (NAME,_print_symbol), \
 345 .CONCAT2 (NAME,_get_symbol_info), \
 346 .CONCAT2 (NAME,_bfd_is_local_label_name), \
 347 .CONCAT2 (NAME,_get_lineno), \
 348 .CONCAT2 (NAME,_find_nearest_line), \
 349 .CONCAT2 (NAME,_bfd_make_debug_symbol), \
 350 .CONCAT2 (NAME,_read_minisymbols), \
 351 .CONCAT2 (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)
 369 .    PARAMS ((bfd *, struct sec *, struct symbol_cache_entry **, bfd_vma,
 370 .             const char **, const char **, unsigned int *));
 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 ((bfd *, void *,
 375 .                                              unsigned long size));
 376 .#define bfd_read_minisymbols(b, d, m, s) \
 377 .  BFD_SEND (b, _read_minisymbols, (b, d, m, s))
 378 .  long     (*_read_minisymbols) PARAMS ((bfd *, boolean, PTR *,
 379 .                                         unsigned int *));
 380 .#define bfd_minisymbol_to_symbol(b, d, m, f) \
 381 .  BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
 382 .  asymbol *(*_minisymbol_to_symbol) PARAMS ((bfd *, boolean, const PTR,
 383 .                                             asymbol *));
 384 .
 385 .  {* Routines for relocs.  *}
 386 .#define BFD_JUMP_TABLE_RELOCS(NAME) \
 387 .CONCAT2 (NAME,_get_reloc_upper_bound), \
 388 .CONCAT2 (NAME,_canonicalize_reloc), \
 389 .CONCAT2 (NAME,_bfd_reloc_type_lookup)
 390 .  long     (*_get_reloc_upper_bound) PARAMS ((bfd *, sec_ptr));
 391 .  long     (*_bfd_canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **,
 392 .                                               struct symbol_cache_entry **));
 393 .  {* See documentation on reloc types.  *}
 394 .  reloc_howto_type *
 395 .           (*reloc_type_lookup) PARAMS ((bfd *, bfd_reloc_code_real_type));
 396 .
 397 .  {* Routines used when writing an object file.  *}
 398 .#define BFD_JUMP_TABLE_WRITE(NAME) \
 399 .CONCAT2 (NAME,_set_arch_mach), \
 400 .CONCAT2 (NAME,_set_section_contents)
 401 .  boolean  (*_bfd_set_arch_mach) PARAMS ((bfd *, enum bfd_architecture,
 402 .                                          unsigned long));
 403 .  boolean  (*_bfd_set_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 404 .                                                 file_ptr, bfd_size_type));
 405 .
 406 .  {* Routines used by the linker.  *}
 407 .#define BFD_JUMP_TABLE_LINK(NAME) \
 408 .CONCAT2 (NAME,_sizeof_headers), \
 409 .CONCAT2 (NAME,_bfd_get_relocated_section_contents), \
 410 .CONCAT2 (NAME,_bfd_relax_section), \
 411 .CONCAT2 (NAME,_bfd_link_hash_table_create), \
 412 .CONCAT2 (NAME,_bfd_link_add_symbols), \
 413 .CONCAT2 (NAME,_bfd_final_link), \
 414 .CONCAT2 (NAME,_bfd_link_split_section), \
 415 .CONCAT2 (NAME,_bfd_gc_sections), \
 416 .CONCAT2 (NAME,_bfd_merge_sections)
 417 .  int      (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean));
 418 .  bfd_byte *(*_bfd_get_relocated_section_contents)
 419 .    PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
 420 .             bfd_byte *, boolean, struct symbol_cache_entry **));
 421 .
 422 .  boolean  (*_bfd_relax_section)
 423 .    PARAMS ((bfd *, struct sec *, struct bfd_link_info *, boolean *));
 424 .
 425 .  {* Create a hash table for the linker.  Different backends store
 426 .     different information in this table.  *}
 427 .  struct bfd_link_hash_table *(*_bfd_link_hash_table_create) PARAMS ((bfd *));
 428 .
 429 .  {* Add symbols from this object file into the hash table.  *}
 430 .  boolean  (*_bfd_link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
 431 .
 432 .  {* Do a link based on the link_order structures attached to each
 433 .     section of the BFD.  *}
 434 .  boolean  (*_bfd_final_link) PARAMS ((bfd *, struct bfd_link_info *));
 435 .
 436 .  {* Should this section be split up into smaller pieces during linking.  *}
 437 .  boolean  (*_bfd_link_split_section) PARAMS ((bfd *, struct sec *));
 438 .
 439 .  {* Remove sections that are not referenced from the output.  *}
 440 .  boolean  (*_bfd_gc_sections) PARAMS ((bfd *, struct bfd_link_info *));
 441 .
 442 .  {* Attempt to merge SEC_MERGE sections.  *}
 443 .  boolean  (*_bfd_merge_sections) PARAMS ((bfd *, struct bfd_link_info *));
 444 .
 445 .  {* Routines to handle dynamic symbols and relocs.  *}
 446 .#define BFD_JUMP_TABLE_DYNAMIC(NAME) \
 447 .CONCAT2 (NAME,_get_dynamic_symtab_upper_bound), \
 448 .CONCAT2 (NAME,_canonicalize_dynamic_symtab), \
 449 .CONCAT2 (NAME,_get_dynamic_reloc_upper_bound), \
 450 .CONCAT2 (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 aout0_big_vec;
 489 extern const bfd_target aout_arm_big_vec;
 490 extern const bfd_target aout_arm_little_vec;
 491 extern const bfd_target aout_mips_big_vec;
 492 extern const bfd_target aout_mips_little_vec;
 493 extern const bfd_target apollocoff_vec;
 494 extern const bfd_target arm_epoc_pe_big_vec;
 495 extern const bfd_target arm_epoc_pe_little_vec;
 496 extern const bfd_target arm_epoc_pei_big_vec;
 497 extern const bfd_target arm_epoc_pei_little_vec;
 498 extern const bfd_target armcoff_big_vec;
 499 extern const bfd_target armcoff_little_vec;
 500 extern const bfd_target armnetbsd_vec;
 501 extern const bfd_target armpe_big_vec;
 502 extern const bfd_target armpe_little_vec;
 503 extern const bfd_target armpei_big_vec;
 504 extern const bfd_target armpei_little_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_elf32_avr_vec;
 510 extern const bfd_target bfd_elf32_big_generic_vec;
 511 extern const bfd_target bfd_elf32_bigarc_vec;
 512 extern const bfd_target bfd_elf32_bigarm_oabi_vec;
 513 extern const bfd_target bfd_elf32_bigarm_vec;
 514 extern const bfd_target bfd_elf32_bigmips_vec;
 515 extern const bfd_target bfd_elf32_cris_vec;
 516 extern const bfd_target bfd_elf32_d10v_vec;
 517 extern const bfd_target bfd_elf32_d30v_vec;
 518 extern const bfd_target bfd_elf32_fr30_vec;
 519 extern const bfd_target bfd_elf32_h8300_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_ia64_hpux_big_vec;
 529 extern const bfd_target bfd_elf32_little_generic_vec;
 530 extern const bfd_target bfd_elf32_littlearc_vec;
 531 extern const bfd_target bfd_elf32_littlearm_oabi_vec;
 532 extern const bfd_target bfd_elf32_littlearm_vec;
 533 extern const bfd_target bfd_elf32_littlemips_vec;
 534 extern const bfd_target bfd_elf32_m32r_vec;
 535 extern const bfd_target bfd_elf32_m68hc11_vec;
 536 extern const bfd_target bfd_elf32_m68hc12_vec;
 537 extern const bfd_target bfd_elf32_m68k_vec;
 538 extern const bfd_target bfd_elf32_m88k_vec;
 539 extern const bfd_target bfd_elf32_mcore_big_vec;
 540 extern const bfd_target bfd_elf32_mcore_little_vec;
 541 extern const bfd_target bfd_elf32_mn10200_vec;
 542 extern const bfd_target bfd_elf32_mn10300_vec;
 543 extern const bfd_target bfd_elf32_openrisc_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_s390_vec;
 549 extern const bfd_target bfd_elf32_sh_vec;
 550 extern const bfd_target bfd_elf32_shblin_vec;
 551 extern const bfd_target bfd_elf32_shl_vec;
 552 extern const bfd_target bfd_elf32_shlin_vec;
 553 extern const bfd_target bfd_elf32_shlnbsd_vec;
 554 extern const bfd_target bfd_elf32_shnbsd_vec;
 555 extern const bfd_target bfd_elf32_sparc_vec;
 556 extern const bfd_target bfd_elf32_tradbigmips_vec;
 557 extern const bfd_target bfd_elf32_tradlittlemips_vec;
 558 extern const bfd_target bfd_elf32_us_cris_vec;
 559 extern const bfd_target bfd_elf32_v850_vec;
 560 extern const bfd_target bfd_elf32_xstormy16_vec;
 561 extern const bfd_target bfd_elf64_alpha_vec;
 562 extern const bfd_target bfd_elf64_big_generic_vec;
 563 extern const bfd_target bfd_elf64_bigmips_vec;
 564 extern const bfd_target bfd_elf64_hppa_linux_vec;
 565 extern const bfd_target bfd_elf64_hppa_vec;
 566 extern const bfd_target bfd_elf64_ia64_aix_big_vec;
 567 extern const bfd_target bfd_elf64_ia64_aix_little_vec;
 568 extern const bfd_target bfd_elf64_ia64_big_vec;
 569 extern const bfd_target bfd_elf64_ia64_hpux_big_vec;
 570 extern const bfd_target bfd_elf64_ia64_little_vec;
 571 extern const bfd_target bfd_elf64_little_generic_vec;
 572 extern const bfd_target bfd_elf64_littlemips_vec;
 573 extern const bfd_target bfd_elf64_mmix_vec;
 574 extern const bfd_target bfd_elf64_powerpc_vec;
 575 extern const bfd_target bfd_elf64_powerpcle_vec;
 576 extern const bfd_target bfd_elf64_s390_vec;
 577 extern const bfd_target bfd_elf64_sparc_vec;
 578 extern const bfd_target bfd_elf64_tradbigmips_vec;
 579 extern const bfd_target bfd_elf64_tradlittlemips_vec;
 580 extern const bfd_target bfd_elf64_x86_64_vec;
 581 extern const bfd_target bfd_mmo_vec;
 582 extern const bfd_target bfd_powerpc_pe_vec;
 583 extern const bfd_target bfd_powerpc_pei_vec;
 584 extern const bfd_target bfd_powerpcle_pe_vec;
 585 extern const bfd_target bfd_powerpcle_pei_vec;
 586 extern const bfd_target cris_aout_vec;
 587 extern const bfd_target demo_64_vec;
 588 extern const bfd_target ecoff_big_vec;
 589 extern const bfd_target ecoff_biglittle_vec;
 590 extern const bfd_target ecoff_little_vec;
 591 extern const bfd_target ecoffalpha_little_vec;
 592 extern const bfd_target go32coff_vec;
 593 extern const bfd_target go32stubbedcoff_vec;
 594 extern const bfd_target h8300coff_vec;
 595 extern const bfd_target h8500coff_vec;
 596 extern const bfd_target host_aout_vec;
 597 extern const bfd_target hp300bsd_vec;
 598 extern const bfd_target hp300hpux_vec;
 599 extern const bfd_target i386aout_vec;
 600 extern const bfd_target i386bsd_vec;
 601 extern const bfd_target i386coff_vec;
 602 extern const bfd_target i386dynix_vec;
 603 extern const bfd_target i386freebsd_vec;
 604 extern const bfd_target i386linux_vec;
 605 extern const bfd_target i386lynx_aout_vec;
 606 extern const bfd_target i386lynx_coff_vec;
 607 extern const bfd_target i386mach3_vec;
 608 extern const bfd_target i386msdos_vec;
 609 extern const bfd_target i386netbsd_vec;
 610 extern const bfd_target i386os9k_vec;
 611 extern const bfd_target i386pe_vec;
 612 extern const bfd_target i386pei_vec;
 613 extern const bfd_target i860coff_vec;
 614 extern const bfd_target icoff_big_vec;
 615 extern const bfd_target icoff_little_vec;
 616 extern const bfd_target ieee_vec;
 617 extern const bfd_target m68k4knetbsd_vec;
 618 extern const bfd_target m68kaux_coff_vec;
 619 extern const bfd_target m68kcoff_vec;
 620 extern const bfd_target m68kcoffun_vec;
 621 extern const bfd_target m68klinux_vec;
 622 extern const bfd_target m68klynx_aout_vec;
 623 extern const bfd_target m68klynx_coff_vec;
 624 extern const bfd_target m68knetbsd_vec;
 625 extern const bfd_target m68ksysvcoff_vec;
 626 extern const bfd_target m88kbcs_vec;
 627 extern const bfd_target m88kmach3_vec;
 628 extern const bfd_target mcore_pe_big_vec;
 629 extern const bfd_target mcore_pe_little_vec;
 630 extern const bfd_target mcore_pei_big_vec;
 631 extern const bfd_target mcore_pei_little_vec;
 632 extern const bfd_target mipslpe_vec;
 633 extern const bfd_target mipslpei_vec;
 634 extern const bfd_target newsos3_vec;
 635 extern const bfd_target nlm32_alpha_vec;
 636 extern const bfd_target nlm32_i386_vec;
 637 extern const bfd_target nlm32_powerpc_vec;
 638 extern const bfd_target nlm32_sparc_vec;
 639 extern const bfd_target oasys_vec;
 640 extern const bfd_target pc532machaout_vec;
 641 extern const bfd_target pc532netbsd_vec;
 642 extern const bfd_target pdp11_aout_vec;
 643 extern const bfd_target pmac_xcoff_vec;
 644 extern const bfd_target ppcboot_vec;
 645 extern const bfd_target riscix_vec;
 646 extern const bfd_target rs6000coff64_vec;
 647 extern const bfd_target rs6000coff_vec;
 648 extern const bfd_target shcoff_small_vec;
 649 extern const bfd_target shcoff_vec;
 650 extern const bfd_target shlcoff_small_vec;
 651 extern const bfd_target shlcoff_vec;
 652 extern const bfd_target shlpe_vec;
 653 extern const bfd_target shlpei_vec;
 654 extern const bfd_target som_vec;
 655 extern const bfd_target sparccoff_vec;
 656 extern const bfd_target sparcle_aout_vec;
 657 extern const bfd_target sparclinux_vec;
 658 extern const bfd_target sparclynx_aout_vec;
 659 extern const bfd_target sparclynx_coff_vec;
 660 extern const bfd_target sparcnetbsd_vec;
 661 extern const bfd_target sunos_big_vec;
 662 extern const bfd_target tic30_aout_vec;
 663 extern const bfd_target tic30_coff_vec;
 664 extern const bfd_target tic54x_coff0_beh_vec;
 665 extern const bfd_target tic54x_coff0_vec;
 666 extern const bfd_target tic54x_coff1_beh_vec;
 667 extern const bfd_target tic54x_coff1_vec;
 668 extern const bfd_target tic54x_coff2_beh_vec;
 669 extern const bfd_target tic54x_coff2_vec;
 670 extern const bfd_target tic80coff_vec;
 671 extern const bfd_target vaxnetbsd_vec;
 672 extern const bfd_target versados_vec;
 673 extern const bfd_target vms_alpha_vec;
 674 extern const bfd_target vms_vax_vec;
 675 extern const bfd_target w65_vec;
 676 extern const bfd_target we32kcoff_vec;
 677 extern const bfd_target z8kcoff_vec;
 678
 679 /* These are always included.  */
 680 extern const bfd_target srec_vec;
 681 extern const bfd_target symbolsrec_vec;
 682 extern const bfd_target tekhex_vec;
 683 extern const bfd_target binary_vec;
 684 extern const bfd_target ihex_vec;
 685
 686 /* All of the xvecs for core files.  */
 687 extern const bfd_target aix386_core_vec;
 688 extern const bfd_target cisco_core_big_vec;
 689 extern const bfd_target cisco_core_little_vec;
 690 extern const bfd_target hppabsd_core_vec;
 691 extern const bfd_target hpux_core_vec;
 692 extern const bfd_target irix_core_vec;
 693 extern const bfd_target netbsd_core_vec;
 694 extern const bfd_target osf_core_vec;
 695 extern const bfd_target ptrace_core_vec;
 696 extern const bfd_target sco5_core_vec;
 697 extern const bfd_target trad_core_vec;
 698
 699 static const bfd_target * const _bfd_target_vector[] = {
 700
 701 #ifdef SELECT_VECS
 702
 703         SELECT_VECS,
 704
 705 #else /* not SELECT_VECS */
 706
 707 #ifdef DEFAULT_VECTOR
 708         &DEFAULT_VECTOR,
 709 #endif
 710         /* This list is alphabetized to make it easy to compare
 711            with other vector lists -- the decls above and
 712            the case statement in configure.in.
 713            Vectors that don't compile on all systems, or aren't finished,
 714            should have an entry here with #if 0 around it, to show that
 715            it wasn't omitted by mistake.  */
 716         &a29kcoff_big_vec,
 717         &a_out_adobe_vec,
 718         &aout0_big_vec,
 719 #if 0
 720         /* We have no way of distinguishing these from other a.out variants */
 721         &aout_arm_big_vec,
 722         &aout_arm_little_vec,
 723         /* No one seems to use this.  */
 724         &aout_mips_big_vec,
 725 #endif
 726         &aout_mips_little_vec,
 727 #if 0
 728         &apollocoff_vec,
 729 #endif
 730         &arm_epoc_pe_big_vec,
 731         &arm_epoc_pe_little_vec,
 732         &arm_epoc_pei_big_vec,
 733         &arm_epoc_pei_little_vec,
 734         &armcoff_big_vec,
 735         &armcoff_little_vec,
 736         &armnetbsd_vec,
 737         &armpe_big_vec,
 738         &armpe_little_vec,
 739         &armpei_big_vec,
 740         &armpei_little_vec,
 741         &b_out_vec_big_host,
 742         &b_out_vec_little_host,
 743         &bfd_efi_app_ia32_vec,
 744 #ifdef BFD64
 745         &bfd_efi_app_ia64_vec,
 746 #endif
 747         &bfd_elf32_avr_vec,
 748
 749         /* This, and other vectors, may not be used in any *.mt configuration.
 750            But that does not mean they are unnecessary.  If configured with
 751            --enable-targets=all, objdump or gdb should be able to examine
 752            the file even if we don't recognize the machine type.  */
 753         &bfd_elf32_big_generic_vec,
 754         &bfd_elf32_bigarc_vec,
 755         &bfd_elf32_bigarm_oabi_vec,
 756         &bfd_elf32_bigarm_vec,
 757         &bfd_elf32_bigmips_vec,
 758         &bfd_elf32_cris_vec,
 759         &bfd_elf32_d10v_vec,
 760         &bfd_elf32_d30v_vec,
 761         &bfd_elf32_fr30_vec,
 762         &bfd_elf32_hppa_linux_vec,
 763         &bfd_elf32_hppa_vec,
 764         &bfd_elf32_i370_vec,
 765         &bfd_elf32_i386_vec,
 766         &bfd_elf32_i860_little_vec,
 767         &bfd_elf32_i860_vec,
 768         &bfd_elf32_i960_vec,
 769 #if 0
 770         &bfd_elf32_ia64_big_vec,
 771 #endif
 772         &bfd_elf32_little_generic_vec,
 773         &bfd_elf32_littlearc_vec,
 774         &bfd_elf32_littlearm_oabi_vec,
 775         &bfd_elf32_littlearm_vec,
 776         &bfd_elf32_littlemips_vec,
 777         &bfd_elf32_m32r_vec,
 778         &bfd_elf32_m68hc11_vec,
 779         &bfd_elf32_m68hc12_vec,
 780         &bfd_elf32_m68k_vec,
 781         &bfd_elf32_m88k_vec,
 782         &bfd_elf32_mcore_big_vec,
 783         &bfd_elf32_mcore_little_vec,
 784         &bfd_elf32_mn10200_vec,
 785         &bfd_elf32_mn10300_vec,
 786         &bfd_elf32_openrisc_vec,
 787         &bfd_elf32_pj_vec,
 788         &bfd_elf32_pjl_vec,
 789         &bfd_elf32_powerpc_vec,
 790         &bfd_elf32_powerpcle_vec,
 791         &bfd_elf32_s390_vec,
 792         &bfd_elf32_sh_vec,
 793         &bfd_elf32_shblin_vec,
 794         &bfd_elf32_shl_vec,
 795         &bfd_elf32_shlin_vec,
 796         &bfd_elf32_shlnbsd_vec,
 797         &bfd_elf32_shnbsd_vec,
 798         &bfd_elf32_sparc_vec,
 799         &bfd_elf32_tradbigmips_vec,
 800         &bfd_elf32_tradlittlemips_vec,
 801         &bfd_elf32_us_cris_vec,
 802         &bfd_elf32_v850_vec,
 803         &bfd_elf32_xstormy16_vec,
 804 #ifdef BFD64
 805         &bfd_elf64_alpha_vec,
 806         &bfd_elf64_big_generic_vec,
 807         &bfd_elf64_bigmips_vec,
 808         &bfd_elf64_hppa_linux_vec,
 809         &bfd_elf64_hppa_vec,
 810         &bfd_elf64_ia64_aix_big_vec,
 811         &bfd_elf64_ia64_aix_little_vec,
 812         &bfd_elf64_ia64_big_vec,
 813         &bfd_elf64_ia64_little_vec,
 814         &bfd_elf64_little_generic_vec,
 815         &bfd_elf64_littlemips_vec,
 816         &bfd_elf64_mmix_vec,
 817         &bfd_elf64_powerpc_vec,
 818         &bfd_elf64_powerpcle_vec,
 819         &bfd_elf64_s390_vec,
 820 #if 0
 821         &bfd_elf64_sparc_vec,
 822 #endif
 823         &bfd_elf64_tradbigmips_vec,
 824         &bfd_elf64_tradlittlemips_vec,
 825         &bfd_elf64_x86_64_vec,
 826         &bfd_mmo_vec,
 827 #endif
 828         &bfd_powerpc_pe_vec,
 829         &bfd_powerpc_pei_vec,
 830         &bfd_powerpcle_pe_vec,
 831         &bfd_powerpcle_pei_vec,
 832         &cris_aout_vec,
 833 #ifdef BFD64
 834         &demo_64_vec,   /* Only compiled if host has long-long support */
 835 #endif
 836         &ecoff_big_vec,
 837         &ecoff_biglittle_vec,
 838         &ecoff_little_vec,
 839 #ifdef BFD64
 840         &ecoffalpha_little_vec,
 841 #endif
 842         &go32coff_vec,
 843         &go32stubbedcoff_vec,
 844         &h8300coff_vec,
 845         &h8500coff_vec,
 846 #if 0
 847         /* Since a.out files lack decent magic numbers, no way to recognize
 848            which kind of a.out file it is.  */
 849         &host_aout_vec,
 850         /* Clashes with sunos_big_vec magic no.  */
 851         &hp300bsd_vec,
 852 #endif
 853         &hp300hpux_vec,
 854         &i386aout_vec,
 855         &i386bsd_vec,
 856         &i386coff_vec,
 857 #if 0
 858         &i386dynix_vec,
 859 #endif
 860         &i386freebsd_vec,
 861 #if 0
 862         /* Since a.out files lack decent magic numbers, no way to recognize
 863            which kind of a.out file it is.  */
 864         &i386linux_vec,
 865 #endif
 866         &i386lynx_aout_vec,
 867         &i386lynx_coff_vec,
 868 #if 0
 869         /* No distinguishing features for Mach 3 executables.  */
 870         &i386mach3_vec,
 871 #endif
 872         &i386msdos_vec,
 873         &i386netbsd_vec,
 874         &i386os9k_vec,
 875         &i386pe_vec,
 876         &i386pei_vec,
 877         &i860coff_vec,
 878         &icoff_big_vec,
 879         &icoff_little_vec,
 880         &ieee_vec,
 881 #if 0
 882         &m68k4knetbsd_vec,
 883         &m68kaux_coff_vec,
 884 #endif
 885         &m68kcoff_vec,
 886         &m68kcoffun_vec,
 887 #if 0
 888         /* Since a.out files lack decent magic numbers, no way to recognize
 889            which kind of a.out file it is.  */
 890         &m68klinux_vec,
 891 #endif
 892         &m68klynx_aout_vec,
 893         &m68klynx_coff_vec,
 894         &m68knetbsd_vec,
 895         &m68ksysvcoff_vec,
 896         &m88kbcs_vec,
 897         &m88kmach3_vec,
 898         &mcore_pe_big_vec,
 899         &mcore_pe_little_vec,
 900         &mcore_pei_big_vec,
 901         &mcore_pei_little_vec,
 902         &mipslpe_vec,
 903         &mipslpei_vec,
 904         &newsos3_vec,
 905 #ifdef BFD64
 906         &nlm32_alpha_vec,
 907 #endif
 908         &nlm32_i386_vec,
 909         &nlm32_powerpc_vec,
 910         &nlm32_sparc_vec,
 911 #if 0
 912         /* We have no oasys tools anymore, so we can't test any of this
 913            anymore. If you want to test the stuff yourself, go ahead...
 914            steve@cygnus.com
 915            Worse, since there is no magic number for archives, there
 916            can be annoying target mis-matches.  */
 917         &oasys_vec,
 918 #endif
 919         &pc532machaout_vec,
 920         &pc532netbsd_vec,
 921         &pdp11_aout_vec,
 922 #if 0
 923         /* This has the same magic number as RS/6000.  */
 924         &pmac_xcoff_vec,
 925 #endif
 926         &ppcboot_vec,
 927 #if 0
 928         /* We have no way of distinguishing these from other a.out variants */
 929         &riscix_vec,
 930 #endif
 931 #ifdef BFD64
 932         &rs6000coff64_vec,
 933 #endif
 934         &rs6000coff_vec,
 935         &shcoff_small_vec,
 936         &shcoff_vec,
 937         &shlcoff_small_vec,
 938         &shlcoff_vec,
 939         &shlpe_vec,
 940         &shlpei_vec,
 941 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
 942         &som_vec,
 943 #endif
 944         &sparccoff_vec,
 945         &sparcle_aout_vec,
 946         &sparclinux_vec,
 947         &sparclynx_aout_vec,
 948         &sparclynx_coff_vec,
 949         &sparcnetbsd_vec,
 950         &sunos_big_vec,
 951         &tic30_aout_vec,
 952         &tic30_coff_vec,
 953         &tic54x_coff0_beh_vec,
 954         &tic54x_coff0_vec,
 955         &tic54x_coff1_beh_vec,
 956         &tic54x_coff1_vec,
 957         &tic54x_coff2_beh_vec,
 958         &tic54x_coff2_vec,
 959         &tic80coff_vec,
 960         &vaxnetbsd_vec,
 961         &versados_vec,
 962 #ifdef BFD64
 963         &vms_alpha_vec,
 964 #endif
 965         &vms_vax_vec,
 966         &w65_vec,
 967         &we32kcoff_vec,
 968         &z8kcoff_vec,
 969 #endif /* not SELECT_VECS */
 970
 971 /* Always support S-records, for convenience.  */
 972         &srec_vec,
 973         &symbolsrec_vec,
 974 /* And tekhex */
 975         &tekhex_vec,
 976 /* Likewise for binary output.  */
 977         &binary_vec,
 978 /* Likewise for ihex.  */
 979         &ihex_vec,
 980
 981 /* Add any required traditional-core-file-handler.  */
 982
 983 #ifdef AIX386_CORE
 984         &aix386_core_vec,
 985 #endif
 986 #if 0
 987         /* We don't include cisco_core_*_vec.  Although it has a magic number,
 988            the magic number isn't at the beginning of the file, and thus
 989            might spuriously match other kinds of files.  */
 990         &cisco_core_big_vec,
 991         &cisco_core_little_vec,
 992 #endif
 993 #ifdef HPPABSD_CORE
 994         &hppabsd_core_vec,
 995 #endif
 996 #ifdef HPUX_CORE
 997         &hpux_core_vec,
 998 #endif
 999 #ifdef IRIX_CORE
1000         &irix_core_vec,
1001 #endif
1002 #ifdef NETBSD_CORE
1003         &netbsd_core_vec,
1004 #endif
1005 #ifdef OSF_CORE
1006         &osf_core_vec,
1007 #endif
1008 #ifdef PTRACE_CORE
1009         &ptrace_core_vec,
1010 #endif
1011 #ifdef SCO5_CORE
1012         &sco5_core_vec,
1013 #endif
1014 #ifdef TRAD_CORE
1015         &trad_core_vec,
1016 #endif
1017
1018         NULL /* end of list marker */
1019 };
1020 const bfd_target * const *bfd_target_vector = _bfd_target_vector;
1021
1022 /* bfd_default_vector[0] contains either the address of the default vector,
1023    if there is one, or zero if there isn't.  */
1024
1025 const bfd_target *bfd_default_vector[] = {
1026 #ifdef DEFAULT_VECTOR
1027         &DEFAULT_VECTOR,
1028 #endif
1029         NULL
1030 };
1031
1032 /* When there is an ambiguous match, bfd_check_format_matches puts the
1033    names of the matching targets in an array.  This variable is the maximum
1034    number of entries that the array could possibly need.  */
1035 const size_t _bfd_target_vector_entries = sizeof (_bfd_target_vector)/sizeof (*_bfd_target_vector);
1036 \f
1037 /* This array maps configuration triplets onto BFD vectors.  */
1038
1039 struct targmatch
1040 {
1041   /* The configuration triplet.  */
1042   const char *triplet;
1043   /* The BFD vector.  If this is NULL, then the vector is found by
1044      searching forward for the next structure with a non NULL vector
1045      field.  */
1046   const bfd_target *vector;
1047 };
1048
1049 /* targmatch.h is built by Makefile out of config.bfd.  */
1050 static const struct targmatch bfd_target_match[] = {
1051 #include "targmatch.h"
1052   { NULL, NULL }
1053 };
1054
1055 static const bfd_target *find_target PARAMS ((const char *));
1056
1057 /* Find a target vector, given a name or configuration triplet.  */
1058
1059 static const bfd_target *
1060 find_target (name)
1061      const char *name;
1062 {
1063   const bfd_target * const *target;
1064   const struct targmatch *match;
1065
1066   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1067     if (strcmp (name, (*target)->name) == 0)
1068       return *target;
1069
1070   /* If we couldn't match on the exact name, try matching on the
1071      configuration triplet.  FIXME: We should run the triplet through
1072      config.sub first, but that is hard.  */
1073   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1074     {
1075       if (fnmatch (match->triplet, name, 0) == 0)
1076         {
1077           while (match->vector == NULL)
1078             ++match;
1079           return match->vector;
1080           break;
1081         }
1082     }
1083
1084   bfd_set_error (bfd_error_invalid_target);
1085   return NULL;
1086 }
1087
1088 /*
1089 FUNCTION
1090         bfd_set_default_target
1091
1092 SYNOPSIS
1093         boolean bfd_set_default_target (const char *name);
1094
1095 DESCRIPTION
1096         Set the default target vector to use when recognizing a BFD.
1097         This takes the name of the target, which may be a BFD target
1098         name or a configuration triplet.
1099 */
1100
1101 boolean
1102 bfd_set_default_target (name)
1103      const char *name;
1104 {
1105   const bfd_target *target;
1106
1107   if (bfd_default_vector[0] != NULL
1108       && strcmp (name, bfd_default_vector[0]->name) == 0)
1109     return true;
1110
1111   target = find_target (name);
1112   if (target == NULL)
1113     return false;
1114
1115   bfd_default_vector[0] = target;
1116   return true;
1117 }
1118
1119 /*
1120 FUNCTION
1121         bfd_find_target
1122
1123 SYNOPSIS
1124         const bfd_target *bfd_find_target(const char *target_name, bfd *abfd);
1125
1126 DESCRIPTION
1127         Return a pointer to the transfer vector for the object target
1128         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
1129         one in the environment variable <<GNUTARGET>>; if that is null or not
1130         defined, then choose the first entry in the target list.
1131         Passing in the string "default" or setting the environment
1132         variable to "default" will cause the first entry in the target
1133         list to be returned, and "target_defaulted" will be set in the
1134         BFD.  This causes <<bfd_check_format>> to loop over all the
1135         targets to find the one that matches the file being read.
1136 */
1137
1138 const bfd_target *
1139 bfd_find_target (target_name, abfd)
1140      const char *target_name;
1141      bfd *abfd;
1142 {
1143   const char *targname;
1144   const bfd_target *target;
1145
1146   if (target_name != NULL)
1147     targname = target_name;
1148   else
1149     targname = getenv ("GNUTARGET");
1150
1151   /* This is safe; the vector cannot be null */
1152   if (targname == NULL || strcmp (targname, "default") == 0)
1153     {
1154       abfd->target_defaulted = true;
1155       if (bfd_default_vector[0] != NULL)
1156         abfd->xvec = bfd_default_vector[0];
1157       else
1158         abfd->xvec = bfd_target_vector[0];
1159       return abfd->xvec;
1160     }
1161
1162   abfd->target_defaulted = false;
1163
1164   target = find_target (targname);
1165   if (target == NULL)
1166     return NULL;
1167
1168   abfd->xvec = target;
1169   return target;
1170 }
1171
1172 /*
1173 FUNCTION
1174         bfd_target_list
1175
1176 SYNOPSIS
1177         const char **bfd_target_list(void);
1178
1179 DESCRIPTION
1180         Return a freshly malloced NULL-terminated
1181         vector of the names of all the valid BFD targets. Do not
1182         modify the names.
1183
1184 */
1185
1186 const char **
1187 bfd_target_list ()
1188 {
1189   int vec_length= 0;
1190   bfd_size_type amt;
1191 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1192   /* The native compiler on the HP9000/700 has a bug which causes it
1193      to loop endlessly when compiling this file.  This avoids it.  */
1194   volatile
1195 #endif
1196   const bfd_target * const *target;
1197   const  char **name_list, **name_ptr;
1198
1199   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1200     vec_length++;
1201
1202   amt = (vec_length + 1) * sizeof (char **);
1203   name_ptr = name_list = (const char **) bfd_zmalloc (amt);
1204
1205   if (name_list == NULL)
1206     return NULL;
1207
1208   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1209     *(name_ptr++) = (*target)->name;
1210
1211   return name_list;
1212 }
1213
1214 /*
1215 FUNCTION
1216         bfd_seach_for_target
1217
1218 SYNOPSIS
1219         const bfd_target * bfd_search_for_target (int (* search_func) (const bfd_target *, void *), void *);
1220
1221 DESCRIPTION
1222         Return a pointer to the first transfer vector in the list of
1223         transfer vectors maintained by BFD that produces a non-zero
1224         result when passed to the function @var{search_func}.  The
1225         parameter @var{data} is passed, unexamined, to the search
1226         function.
1227 */
1228
1229 const bfd_target *
1230 bfd_search_for_target (search_func, data)
1231      int (* search_func) PARAMS ((const bfd_target * target, void * data));
1232      void * data;
1233 {
1234   const bfd_target * const * target;
1235
1236   for (target = bfd_target_vector; * target != NULL; target ++)
1237     if (search_func (* target, data))
1238       return * target;
1239
1240   return NULL;
1241 }