bfd/targets.c

   1 /* Generic target-file-type support for the BFD library.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002, 2003, 2004, 2005
   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    It's okay to see some:
  30 #if 0
  31    directives in this source file, as targets.c uses them to exclude
  32    certain BFD vectors.  This comment is specially formatted to catch
  33    users who grep for ^#if 0, so please keep it this way!
  34 */
  35
  36 /*
  37 SECTION
  38         Targets
  39
  40 DESCRIPTION
  41         Each port of BFD to a different machine requires the creation
  42         of a target back end. All the back end provides to the root
  43         part of BFD is a structure containing pointers to functions
  44         which perform certain low level operations on files. BFD
  45         translates the applications's requests through a pointer into
  46         calls to the back end routines.
  47
  48         When a file is opened with <<bfd_openr>>, its format and
  49         target are unknown. BFD uses various mechanisms to determine
  50         how to interpret the file. The operations performed are:
  51
  52         o Create a BFD by calling the internal routine
  53         <<_bfd_new_bfd>>, then call <<bfd_find_target>> with the
  54         target string supplied to <<bfd_openr>> and the new BFD pointer.
  55
  56         o If a null target string was provided to <<bfd_find_target>>,
  57         look up the environment variable <<GNUTARGET>> and use
  58         that as the target string.
  59
  60         o If the target string is still <<NULL>>, or the target string is
  61         <<default>>, then use the first item in the target vector
  62         as the target type, and set <<target_defaulted>> in the BFD to
  63         cause <<bfd_check_format>> to loop through all the targets.
  64         @xref{bfd_target}.  @xref{Formats}.
  65
  66         o Otherwise, inspect the elements in the target vector
  67         one by one, until a match on target name is found. When found,
  68         use it.
  69
  70         o Otherwise return the error <<bfd_error_invalid_target>> to
  71         <<bfd_openr>>.
  72
  73         o <<bfd_openr>> attempts to open the file using
  74         <<bfd_open_file>>, and returns the BFD.
  75
  76         Once the BFD has been opened and the target selected, the file
  77         format may be determined. This is done by calling
  78         <<bfd_check_format>> on the BFD with a suggested format.
  79         If <<target_defaulted>> has been set, each possible target
  80         type is tried to see if it recognizes the specified format.
  81         <<bfd_check_format>> returns <<TRUE>> when the caller guesses right.
  82 @menu
  83 @* bfd_target::
  84 @end menu
  85 */
  86
  87 /*
  88
  89 INODE
  90         bfd_target,  , Targets, Targets
  91 DOCDD
  92 SUBSECTION
  93         bfd_target
  94
  95 DESCRIPTION
  96         This structure contains everything that BFD knows about a
  97         target. It includes things like its byte order, name, and which
  98         routines to call to do various operations.
  99
 100         Every BFD points to a target structure with its <<xvec>>
 101         member.
 102
 103         The macros below are used to dispatch to functions through the
 104         <<bfd_target>> vector. They are used in a number of macros further
 105         down in @file{bfd.h}, and are also used when calling various
 106         routines by hand inside the BFD implementation.  The @var{arglist}
 107         argument must be parenthesized; it contains all the arguments
 108         to the called function.
 109
 110         They make the documentation (more) unpleasant to read, so if
 111         someone wants to fix this and not break the above, please do.
 112
 113 .#define BFD_SEND(bfd, message, arglist) \
 114 .  ((*((bfd)->xvec->message)) arglist)
 115 .
 116 .#ifdef DEBUG_BFD_SEND
 117 .#undef BFD_SEND
 118 .#define BFD_SEND(bfd, message, arglist) \
 119 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 120 .    ((*((bfd)->xvec->message)) arglist) : \
 121 .    (bfd_assert (__FILE__,__LINE__), NULL))
 122 .#endif
 123
 124         For operations which index on the BFD format:
 125
 126 .#define BFD_SEND_FMT(bfd, message, arglist) \
 127 .  (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist)
 128 .
 129 .#ifdef DEBUG_BFD_SEND
 130 .#undef BFD_SEND_FMT
 131 .#define BFD_SEND_FMT(bfd, message, arglist) \
 132 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 133 .   (((bfd)->xvec->message[(int) ((bfd)->format)]) arglist) : \
 134 .   (bfd_assert (__FILE__,__LINE__), NULL))
 135 .#endif
 136 .
 137         This is the structure which defines the type of BFD this is.  The
 138         <<xvec>> member of the struct <<bfd>> itself points here.  Each
 139         module that implements access to a different target under BFD,
 140         defines one of these.
 141
 142         FIXME, these names should be rationalised with the names of
 143         the entry points which call them. Too bad we can't have one
 144         macro to define them both!
 145
 146 .enum bfd_flavour
 147 .{
 148 .  bfd_target_unknown_flavour,
 149 .  bfd_target_aout_flavour,
 150 .  bfd_target_coff_flavour,
 151 .  bfd_target_ecoff_flavour,
 152 .  bfd_target_xcoff_flavour,
 153 .  bfd_target_elf_flavour,
 154 .  bfd_target_ieee_flavour,
 155 .  bfd_target_nlm_flavour,
 156 .  bfd_target_oasys_flavour,
 157 .  bfd_target_tekhex_flavour,
 158 .  bfd_target_srec_flavour,
 159 .  bfd_target_ihex_flavour,
 160 .  bfd_target_som_flavour,
 161 .  bfd_target_os9k_flavour,
 162 .  bfd_target_versados_flavour,
 163 .  bfd_target_msdos_flavour,
 164 .  bfd_target_ovax_flavour,
 165 .  bfd_target_evax_flavour,
 166 .  bfd_target_mmo_flavour,
 167 .  bfd_target_mach_o_flavour,
 168 .  bfd_target_pef_flavour,
 169 .  bfd_target_pef_xlib_flavour,
 170 .  bfd_target_sym_flavour
 171 .};
 172 .
 173 .enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
 174 .
 175 .{* Forward declaration.  *}
 176 .typedef struct bfd_link_info _bfd_link_info;
 177 .
 178 .typedef struct bfd_target
 179 .{
 180 .  {* Identifies the kind of target, e.g., SunOS4, Ultrix, etc.  *}
 181 .  char *name;
 182 .
 183 . {* The "flavour" of a back end is a general indication about
 184 .    the contents of a file.  *}
 185 .  enum bfd_flavour flavour;
 186 .
 187 .  {* The order of bytes within the data area of a file.  *}
 188 .  enum bfd_endian byteorder;
 189 .
 190 . {* The order of bytes within the header parts of a file.  *}
 191 .  enum bfd_endian header_byteorder;
 192 .
 193 .  {* A mask of all the flags which an executable may have set -
 194 .     from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.  *}
 195 .  flagword object_flags;
 196 .
 197 . {* A mask of all the flags which a section may have set - from
 198 .    the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.  *}
 199 .  flagword section_flags;
 200 .
 201 . {* The character normally found at the front of a symbol.
 202 .    (if any), perhaps `_'.  *}
 203 .  char symbol_leading_char;
 204 .
 205 . {* The pad character for file names within an archive header.  *}
 206 .  char ar_pad_char;
 207 .
 208 .  {* The maximum number of characters in an archive header.  *}
 209 .  unsigned short ar_max_namelen;
 210 .
 211 .  {* Entries for byte swapping for data. These are different from the
 212 .     other entry points, since they don't take a BFD as the first argument.
 213 .     Certain other handlers could do the same.  *}
 214 .  bfd_uint64_t   (*bfd_getx64) (const void *);
 215 .  bfd_int64_t    (*bfd_getx_signed_64) (const void *);
 216 .  void           (*bfd_putx64) (bfd_uint64_t, void *);
 217 .  bfd_vma        (*bfd_getx32) (const void *);
 218 .  bfd_signed_vma (*bfd_getx_signed_32) (const void *);
 219 .  void           (*bfd_putx32) (bfd_vma, void *);
 220 .  bfd_vma        (*bfd_getx16) (const void *);
 221 .  bfd_signed_vma (*bfd_getx_signed_16) (const void *);
 222 .  void           (*bfd_putx16) (bfd_vma, void *);
 223 .
 224 .  {* Byte swapping for the headers.  *}
 225 .  bfd_uint64_t   (*bfd_h_getx64) (const void *);
 226 .  bfd_int64_t    (*bfd_h_getx_signed_64) (const void *);
 227 .  void           (*bfd_h_putx64) (bfd_uint64_t, void *);
 228 .  bfd_vma        (*bfd_h_getx32) (const void *);
 229 .  bfd_signed_vma (*bfd_h_getx_signed_32) (const void *);
 230 .  void           (*bfd_h_putx32) (bfd_vma, void *);
 231 .  bfd_vma        (*bfd_h_getx16) (const void *);
 232 .  bfd_signed_vma (*bfd_h_getx_signed_16) (const void *);
 233 .  void           (*bfd_h_putx16) (bfd_vma, void *);
 234 .
 235 .  {* Format dependent routines: these are vectors of entry points
 236 .     within the target vector structure, one for each format to check.  *}
 237 .
 238 .  {* Check the format of a file being read.  Return a <<bfd_target *>> or zero.  *}
 239 .  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) (bfd *);
 240 .
 241 .  {* Set the format of a file being written.  *}
 242 .  bfd_boolean (*_bfd_set_format[bfd_type_end]) (bfd *);
 243 .
 244 .  {* Write cached information into a file being written, at <<bfd_close>>.  *}
 245 .  bfd_boolean (*_bfd_write_contents[bfd_type_end]) (bfd *);
 246 .
 247 The general target vector.  These vectors are initialized using the
 248 BFD_JUMP_TABLE macros.
 249 .
 250 .  {* Generic entry points.  *}
 251 .#define BFD_JUMP_TABLE_GENERIC(NAME) \
 252 .  NAME##_close_and_cleanup, \
 253 .  NAME##_bfd_free_cached_info, \
 254 .  NAME##_new_section_hook, \
 255 .  NAME##_get_section_contents, \
 256 .  NAME##_get_section_contents_in_window
 257 .
 258 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 259 .  bfd_boolean (*_close_and_cleanup) (bfd *);
 260 .  {* Ask the BFD to free all cached information.  *}
 261 .  bfd_boolean (*_bfd_free_cached_info) (bfd *);
 262 .  {* Called when a new section is created.  *}
 263 .  bfd_boolean (*_new_section_hook) (bfd *, sec_ptr);
 264 .  {* Read the contents of a section.  *}
 265 .  bfd_boolean (*_bfd_get_section_contents)
 266 .    (bfd *, sec_ptr, void *, file_ptr, bfd_size_type);
 267 .  bfd_boolean (*_bfd_get_section_contents_in_window)
 268 .    (bfd *, sec_ptr, bfd_window *, file_ptr, bfd_size_type);
 269 .
 270 .  {* Entry points to copy private data.  *}
 271 .#define BFD_JUMP_TABLE_COPY(NAME) \
 272 .  NAME##_bfd_copy_private_bfd_data, \
 273 .  NAME##_bfd_merge_private_bfd_data, \
 274 .  NAME##_bfd_copy_private_section_data, \
 275 .  NAME##_bfd_copy_private_symbol_data, \
 276 .  NAME##_bfd_copy_private_header_data, \
 277 .  NAME##_bfd_set_private_flags, \
 278 .  NAME##_bfd_print_private_bfd_data
 279 .
 280 .  {* Called to copy BFD general private data from one object file
 281 .     to another.  *}
 282 .  bfd_boolean (*_bfd_copy_private_bfd_data) (bfd *, bfd *);
 283 .  {* Called to merge BFD general private data from one object file
 284 .     to a common output file when linking.  *}
 285 .  bfd_boolean (*_bfd_merge_private_bfd_data) (bfd *, bfd *);
 286 .  {* Called to copy BFD private section data from one object file
 287 .     to another.  *}
 288 .  bfd_boolean (*_bfd_copy_private_section_data)
 289 .    (bfd *, sec_ptr, bfd *, sec_ptr);
 290 .  {* Called to copy BFD private symbol data from one symbol
 291 .     to another.  *}
 292 .  bfd_boolean (*_bfd_copy_private_symbol_data)
 293 .    (bfd *, asymbol *, bfd *, asymbol *);
 294 .  {* Called to copy BFD private header data from one object file
 295 .     to another.  *}
 296 .  bfd_boolean (*_bfd_copy_private_header_data)
 297 .    (bfd *, bfd *);
 298 .  {* Called to set private backend flags.  *}
 299 .  bfd_boolean (*_bfd_set_private_flags) (bfd *, flagword);
 300 .
 301 .  {* Called to print private BFD data.  *}
 302 .  bfd_boolean (*_bfd_print_private_bfd_data) (bfd *, void *);
 303 .
 304 .  {* Core file entry points.  *}
 305 .#define BFD_JUMP_TABLE_CORE(NAME) \
 306 .  NAME##_core_file_failing_command, \
 307 .  NAME##_core_file_failing_signal, \
 308 .  NAME##_core_file_matches_executable_p
 309 .
 310 .  char *      (*_core_file_failing_command) (bfd *);
 311 .  int         (*_core_file_failing_signal) (bfd *);
 312 .  bfd_boolean (*_core_file_matches_executable_p) (bfd *, bfd *);
 313 .
 314 .  {* Archive entry points.  *}
 315 .#define BFD_JUMP_TABLE_ARCHIVE(NAME) \
 316 .  NAME##_slurp_armap, \
 317 .  NAME##_slurp_extended_name_table, \
 318 .  NAME##_construct_extended_name_table, \
 319 .  NAME##_truncate_arname, \
 320 .  NAME##_write_armap, \
 321 .  NAME##_read_ar_hdr, \
 322 .  NAME##_openr_next_archived_file, \
 323 .  NAME##_get_elt_at_index, \
 324 .  NAME##_generic_stat_arch_elt, \
 325 .  NAME##_update_armap_timestamp
 326 .
 327 .  bfd_boolean (*_bfd_slurp_armap) (bfd *);
 328 .  bfd_boolean (*_bfd_slurp_extended_name_table) (bfd *);
 329 .  bfd_boolean (*_bfd_construct_extended_name_table)
 330 .    (bfd *, char **, bfd_size_type *, const char **);
 331 .  void        (*_bfd_truncate_arname) (bfd *, const char *, char *);
 332 .  bfd_boolean (*write_armap)
 333 .    (bfd *, unsigned int, struct orl *, unsigned int, int);
 334 .  void *      (*_bfd_read_ar_hdr_fn) (bfd *);
 335 .  bfd *       (*openr_next_archived_file) (bfd *, bfd *);
 336 .#define bfd_get_elt_at_index(b,i) BFD_SEND (b, _bfd_get_elt_at_index, (b,i))
 337 .  bfd *       (*_bfd_get_elt_at_index) (bfd *, symindex);
 338 .  int         (*_bfd_stat_arch_elt) (bfd *, struct stat *);
 339 .  bfd_boolean (*_bfd_update_armap_timestamp) (bfd *);
 340 .
 341 .  {* Entry points used for symbols.  *}
 342 .#define BFD_JUMP_TABLE_SYMBOLS(NAME) \
 343 .  NAME##_get_symtab_upper_bound, \
 344 .  NAME##_canonicalize_symtab, \
 345 .  NAME##_make_empty_symbol, \
 346 .  NAME##_print_symbol, \
 347 .  NAME##_get_symbol_info, \
 348 .  NAME##_bfd_is_local_label_name, \
 349 .  NAME##_bfd_is_target_special_symbol, \
 350 .  NAME##_get_lineno, \
 351 .  NAME##_find_nearest_line, \
 352 .  NAME##_bfd_make_debug_symbol, \
 353 .  NAME##_read_minisymbols, \
 354 .  NAME##_minisymbol_to_symbol
 355 .
 356 .  long        (*_bfd_get_symtab_upper_bound) (bfd *);
 357 .  long        (*_bfd_canonicalize_symtab)
 358 .    (bfd *, struct bfd_symbol **);
 359 .  struct bfd_symbol *
 360 .              (*_bfd_make_empty_symbol) (bfd *);
 361 .  void        (*_bfd_print_symbol)
 362 .    (bfd *, void *, struct bfd_symbol *, bfd_print_symbol_type);
 363 .#define bfd_print_symbol(b,p,s,e) BFD_SEND (b, _bfd_print_symbol, (b,p,s,e))
 364 .  void        (*_bfd_get_symbol_info)
 365 .    (bfd *, struct bfd_symbol *, symbol_info *);
 366 .#define bfd_get_symbol_info(b,p,e) BFD_SEND (b, _bfd_get_symbol_info, (b,p,e))
 367 .  bfd_boolean (*_bfd_is_local_label_name) (bfd *, const char *);
 368 .  bfd_boolean (*_bfd_is_target_special_symbol) (bfd *, asymbol *);
 369 .  alent *     (*_get_lineno) (bfd *, struct bfd_symbol *);
 370 .  bfd_boolean (*_bfd_find_nearest_line)
 371 .    (bfd *, struct bfd_section *, struct bfd_symbol **, bfd_vma,
 372 .     const char **, const char **, unsigned int *);
 373 . {* Back-door to allow format-aware applications to create debug symbols
 374 .    while using BFD for everything else.  Currently used by the assembler
 375 .    when creating COFF files.  *}
 376 .  asymbol *   (*_bfd_make_debug_symbol)
 377 .    (bfd *, void *, 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)
 381 .    (bfd *, bfd_boolean, void **, 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)
 385 .    (bfd *, bfd_boolean, const void *, asymbol *);
 386 .
 387 .  {* Routines for relocs.  *}
 388 .#define BFD_JUMP_TABLE_RELOCS(NAME) \
 389 .  NAME##_get_reloc_upper_bound, \
 390 .  NAME##_canonicalize_reloc, \
 391 .  NAME##_bfd_reloc_type_lookup
 392 .
 393 .  long        (*_get_reloc_upper_bound) (bfd *, sec_ptr);
 394 .  long        (*_bfd_canonicalize_reloc)
 395 .    (bfd *, sec_ptr, arelent **, struct bfd_symbol **);
 396 .  {* See documentation on reloc types.  *}
 397 .  reloc_howto_type *
 398 .              (*reloc_type_lookup) (bfd *, bfd_reloc_code_real_type);
 399 .
 400 .  {* Routines used when writing an object file.  *}
 401 .#define BFD_JUMP_TABLE_WRITE(NAME) \
 402 .  NAME##_set_arch_mach, \
 403 .  NAME##_set_section_contents
 404 .
 405 .  bfd_boolean (*_bfd_set_arch_mach)
 406 .    (bfd *, enum bfd_architecture, unsigned long);
 407 .  bfd_boolean (*_bfd_set_section_contents)
 408 .    (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
 409 .
 410 .  {* Routines used by the linker.  *}
 411 .#define BFD_JUMP_TABLE_LINK(NAME) \
 412 .  NAME##_sizeof_headers, \
 413 .  NAME##_bfd_get_relocated_section_contents, \
 414 .  NAME##_bfd_relax_section, \
 415 .  NAME##_bfd_link_hash_table_create, \
 416 .  NAME##_bfd_link_hash_table_free, \
 417 .  NAME##_bfd_link_add_symbols, \
 418 .  NAME##_bfd_link_just_syms, \
 419 .  NAME##_bfd_final_link, \
 420 .  NAME##_bfd_link_split_section, \
 421 .  NAME##_bfd_gc_sections, \
 422 .  NAME##_bfd_merge_sections, \
 423 .  NAME##_bfd_is_group_section, \
 424 .  NAME##_bfd_discard_group, \
 425 .  NAME##_section_already_linked \
 426 .
 427 .  int         (*_bfd_sizeof_headers) (bfd *, bfd_boolean);
 428 .  bfd_byte *  (*_bfd_get_relocated_section_contents)
 429 .    (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 430 .     bfd_byte *, bfd_boolean, struct bfd_symbol **);
 431 .
 432 .  bfd_boolean (*_bfd_relax_section)
 433 .    (bfd *, struct bfd_section *, struct bfd_link_info *, bfd_boolean *);
 434 .
 435 .  {* Create a hash table for the linker.  Different backends store
 436 .     different information in this table.  *}
 437 .  struct bfd_link_hash_table *
 438 .              (*_bfd_link_hash_table_create) (bfd *);
 439 .
 440 .  {* Release the memory associated with the linker hash table.  *}
 441 .  void        (*_bfd_link_hash_table_free) (struct bfd_link_hash_table *);
 442 .
 443 .  {* Add symbols from this object file into the hash table.  *}
 444 .  bfd_boolean (*_bfd_link_add_symbols) (bfd *, struct bfd_link_info *);
 445 .
 446 .  {* Indicate that we are only retrieving symbol values from this section.  *}
 447 .  void        (*_bfd_link_just_syms) (asection *, struct bfd_link_info *);
 448 .
 449 .  {* Do a link based on the link_order structures attached to each
 450 .     section of the BFD.  *}
 451 .  bfd_boolean (*_bfd_final_link) (bfd *, struct bfd_link_info *);
 452 .
 453 .  {* Should this section be split up into smaller pieces during linking.  *}
 454 .  bfd_boolean (*_bfd_link_split_section) (bfd *, struct bfd_section *);
 455 .
 456 .  {* Remove sections that are not referenced from the output.  *}
 457 .  bfd_boolean (*_bfd_gc_sections) (bfd *, struct bfd_link_info *);
 458 .
 459 .  {* Attempt to merge SEC_MERGE sections.  *}
 460 .  bfd_boolean (*_bfd_merge_sections) (bfd *, struct bfd_link_info *);
 461 .
 462 .  {* Is this section a member of a group?  *}
 463 .  bfd_boolean (*_bfd_is_group_section) (bfd *, const struct bfd_section *);
 464 .
 465 .  {* Discard members of a group.  *}
 466 .  bfd_boolean (*_bfd_discard_group) (bfd *, struct bfd_section *);
 467 .
 468 .  {* Check if SEC has been already linked during a reloceatable or
 469 .     final link.  *}
 470 .  void (*_section_already_linked) (bfd *, struct bfd_section *);
 471 .
 472 .  {* Routines to handle dynamic symbols and relocs.  *}
 473 .#define BFD_JUMP_TABLE_DYNAMIC(NAME) \
 474 .  NAME##_get_dynamic_symtab_upper_bound, \
 475 .  NAME##_canonicalize_dynamic_symtab, \
 476 .  NAME##_get_synthetic_symtab, \
 477 .  NAME##_get_dynamic_reloc_upper_bound, \
 478 .  NAME##_canonicalize_dynamic_reloc
 479 .
 480 .  {* Get the amount of memory required to hold the dynamic symbols.  *}
 481 .  long        (*_bfd_get_dynamic_symtab_upper_bound) (bfd *);
 482 .  {* Read in the dynamic symbols.  *}
 483 .  long        (*_bfd_canonicalize_dynamic_symtab)
 484 .    (bfd *, struct bfd_symbol **);
 485 .  {* Create synthetized symbols.  *}
 486 .  long        (*_bfd_get_synthetic_symtab)
 487 .    (bfd *, long, struct bfd_symbol **, long, struct bfd_symbol **,
 488 .     struct bfd_symbol **);
 489 .  {* Get the amount of memory required to hold the dynamic relocs.  *}
 490 .  long        (*_bfd_get_dynamic_reloc_upper_bound) (bfd *);
 491 .  {* Read in the dynamic relocs.  *}
 492 .  long        (*_bfd_canonicalize_dynamic_reloc)
 493 .    (bfd *, arelent **, struct bfd_symbol **);
 494 .
 495
 496 A pointer to an alternative bfd_target in case the current one is not
 497 satisfactory.  This can happen when the target cpu supports both big
 498 and little endian code, and target chosen by the linker has the wrong
 499 endianness.  The function open_output() in ld/ldlang.c uses this field
 500 to find an alternative output format that is suitable.
 501
 502 .  {* Opposite endian version of this target.  *}
 503 .  const struct bfd_target * alternative_target;
 504 .
 505
 506 .  {* Data for use by back-end routines, which isn't
 507 .     generic enough to belong in this structure.  *}
 508 .  const void *backend_data;
 509 .
 510 .} bfd_target;
 511 .
 512 */
 513
 514 /* All known xvecs (even those that don't compile on all systems).
 515    Alphabetized for easy reference.
 516    They are listed a second time below, since
 517    we can't intermix extern's and initializers.  */
 518 extern const bfd_target a29kcoff_big_vec;
 519 extern const bfd_target a_out_adobe_vec;
 520 extern const bfd_target aix5coff64_vec;
 521 extern const bfd_target aout0_big_vec;
 522 extern const bfd_target aout_arm_big_vec;
 523 extern const bfd_target aout_arm_little_vec;
 524 extern const bfd_target aout_mips_big_vec;
 525 extern const bfd_target aout_mips_little_vec;
 526 extern const bfd_target apollocoff_vec;
 527 extern const bfd_target arm_epoc_pe_big_vec;
 528 extern const bfd_target arm_epoc_pe_little_vec;
 529 extern const bfd_target arm_epoc_pei_big_vec;
 530 extern const bfd_target arm_epoc_pei_little_vec;
 531 extern const bfd_target armcoff_big_vec;
 532 extern const bfd_target armcoff_little_vec;
 533 extern const bfd_target armnetbsd_vec;
 534 extern const bfd_target armpe_big_vec;
 535 extern const bfd_target armpe_little_vec;
 536 extern const bfd_target armpei_big_vec;
 537 extern const bfd_target armpei_little_vec;
 538 extern const bfd_target b_out_vec_big_host;
 539 extern const bfd_target b_out_vec_little_host;
 540 extern const bfd_target bfd_efi_app_ia32_vec;
 541 extern const bfd_target bfd_efi_app_ia64_vec;
 542 extern const bfd_target bfd_elf32_avr_vec;
 543 extern const bfd_target bfd_elf32_big_generic_vec;
 544 extern const bfd_target bfd_elf32_bigarc_vec;
 545 extern const bfd_target bfd_elf32_bigarm_vec;
 546 extern const bfd_target bfd_elf32_bigarm_symbian_vec;
 547 extern const bfd_target bfd_elf32_bigarm_vxworks_vec;
 548 extern const bfd_target bfd_elf32_bigmips_vec;
 549 extern const bfd_target bfd_elf32_cr16c_vec;
 550 extern const bfd_target bfd_elf32_cris_vec;
 551 extern const bfd_target bfd_elf32_crx_vec;
 552 extern const bfd_target bfd_elf32_d10v_vec;
 553 extern const bfd_target bfd_elf32_d30v_vec;
 554 extern const bfd_target bfd_elf32_dlx_big_vec;
 555 extern const bfd_target bfd_elf32_fr30_vec;
 556 extern const bfd_target bfd_elf32_frv_vec;
 557 extern const bfd_target bfd_elf32_frvfdpic_vec;
 558 extern const bfd_target bfd_elf32_h8300_vec;
 559 extern const bfd_target bfd_elf32_hppa_linux_vec;
 560 extern const bfd_target bfd_elf32_hppa_nbsd_vec;
 561 extern const bfd_target bfd_elf32_hppa_vec;
 562 extern const bfd_target bfd_elf32_i370_vec;
 563 extern const bfd_target bfd_elf32_i386_freebsd_vec;
 564 extern const bfd_target bfd_elf32_i386_vec;
 565 extern const bfd_target bfd_elf32_i860_little_vec;
 566 extern const bfd_target bfd_elf32_i860_vec;
 567 extern const bfd_target bfd_elf32_i960_vec;
 568 extern const bfd_target bfd_elf32_ia64_big_vec;
 569 extern const bfd_target bfd_elf32_ia64_hpux_big_vec;
 570 extern const bfd_target bfd_elf32_ip2k_vec;
 571 extern const bfd_target bfd_elf32_iq2000_vec;
 572 extern const bfd_target bfd_elf32_little_generic_vec;
 573 extern const bfd_target bfd_elf32_littlearc_vec;
 574 extern const bfd_target bfd_elf32_littlearm_vec;
 575 extern const bfd_target bfd_elf32_littlearm_symbian_vec;
 576 extern const bfd_target bfd_elf32_littlearm_vxworks_vec;
 577 extern const bfd_target bfd_elf32_littlemips_vec;
 578 extern const bfd_target bfd_elf32_m32r_vec;
 579 extern const bfd_target bfd_elf32_m32rle_vec;
 580 extern const bfd_target bfd_elf32_m32rlin_vec;
 581 extern const bfd_target bfd_elf32_m32rlelin_vec;
 582 extern const bfd_target bfd_elf32_m68hc11_vec;
 583 extern const bfd_target bfd_elf32_m68hc12_vec;
 584 extern const bfd_target bfd_elf32_m68k_vec;
 585 extern const bfd_target bfd_elf32_m88k_vec;
 586 extern const bfd_target bfd_elf32_mcore_big_vec;
 587 extern const bfd_target bfd_elf32_mcore_little_vec;
 588 extern const bfd_target bfd_elf32_mn10200_vec;
 589 extern const bfd_target bfd_elf32_mn10300_vec;
 590 extern const bfd_target bfd_elf32_msp430_vec;
 591 extern const bfd_target bfd_elf32_nbigmips_vec;
 592 extern const bfd_target bfd_elf32_nlittlemips_vec;
 593 extern const bfd_target bfd_elf32_ntradbigmips_vec;
 594 extern const bfd_target bfd_elf32_ntradlittlemips_vec;
 595 extern const bfd_target bfd_elf32_openrisc_vec;
 596 extern const bfd_target bfd_elf32_or32_big_vec;
 597 extern const bfd_target bfd_elf32_pj_vec;
 598 extern const bfd_target bfd_elf32_pjl_vec;
 599 extern const bfd_target bfd_elf32_powerpc_vec;
 600 extern const bfd_target bfd_elf32_powerpcle_vec;
 601 extern const bfd_target bfd_elf32_s390_vec;
 602 extern const bfd_target bfd_elf32_sh64_vec;
 603 extern const bfd_target bfd_elf32_sh64l_vec;
 604 extern const bfd_target bfd_elf32_sh64lin_vec;
 605 extern const bfd_target bfd_elf32_sh64blin_vec;
 606 extern const bfd_target bfd_elf32_sh64lnbsd_vec;
 607 extern const bfd_target bfd_elf32_sh64nbsd_vec;
 608 extern const bfd_target bfd_elf32_sh_vec;
 609 extern const bfd_target bfd_elf32_shblin_vec;
 610 extern const bfd_target bfd_elf32_shl_vec;
 611 extern const bfd_target bfd_elf32_shl_symbian_vec;
 612 extern const bfd_target bfd_elf32_shlin_vec;
 613 extern const bfd_target bfd_elf32_shlnbsd_vec;
 614 extern const bfd_target bfd_elf32_shnbsd_vec;
 615 extern const bfd_target bfd_elf32_sparc_vec;
 616 extern const bfd_target bfd_elf32_tradbigmips_vec;
 617 extern const bfd_target bfd_elf32_tradlittlemips_vec;
 618 extern const bfd_target bfd_elf32_us_cris_vec;
 619 extern const bfd_target bfd_elf32_v850_vec;
 620 extern const bfd_target bfd_elf32_vax_vec;
 621 extern const bfd_target bfd_elf32_xstormy16_vec;
 622 extern const bfd_target bfd_elf32_xtensa_be_vec;
 623 extern const bfd_target bfd_elf32_xtensa_le_vec;
 624 extern const bfd_target bfd_elf64_alpha_freebsd_vec;
 625 extern const bfd_target bfd_elf64_alpha_vec;
 626 extern const bfd_target bfd_elf64_big_generic_vec;
 627 extern const bfd_target bfd_elf64_bigmips_vec;
 628 extern const bfd_target bfd_elf64_hppa_linux_vec;
 629 extern const bfd_target bfd_elf64_hppa_vec;
 630 extern const bfd_target bfd_elf64_ia64_big_vec;
 631 extern const bfd_target bfd_elf64_ia64_hpux_big_vec;
 632 extern const bfd_target bfd_elf64_ia64_little_vec;
 633 extern const bfd_target bfd_elf64_little_generic_vec;
 634 extern const bfd_target bfd_elf64_littlemips_vec;
 635 extern const bfd_target bfd_elf64_mmix_vec;
 636 extern const bfd_target bfd_elf64_powerpc_vec;
 637 extern const bfd_target bfd_elf64_powerpcle_vec;
 638 extern const bfd_target bfd_elf64_s390_vec;
 639 extern const bfd_target bfd_elf64_sh64_vec;
 640 extern const bfd_target bfd_elf64_sh64l_vec;
 641 extern const bfd_target bfd_elf64_sh64lin_vec;
 642 extern const bfd_target bfd_elf64_sh64blin_vec;
 643 extern const bfd_target bfd_elf64_sh64lnbsd_vec;
 644 extern const bfd_target bfd_elf64_sh64nbsd_vec;
 645 extern const bfd_target bfd_elf64_sparc_vec;
 646 extern const bfd_target bfd_elf64_tradbigmips_vec;
 647 extern const bfd_target bfd_elf64_tradlittlemips_vec;
 648 extern const bfd_target bfd_elf64_x86_64_vec;
 649 extern const bfd_target bfd_mmo_vec;
 650 extern const bfd_target bfd_powerpc_pe_vec;
 651 extern const bfd_target bfd_powerpc_pei_vec;
 652 extern const bfd_target bfd_powerpcle_pe_vec;
 653 extern const bfd_target bfd_powerpcle_pei_vec;
 654 extern const bfd_target cris_aout_vec;
 655 extern const bfd_target demo_64_vec;
 656 extern const bfd_target ecoff_big_vec;
 657 extern const bfd_target ecoff_biglittle_vec;
 658 extern const bfd_target ecoff_little_vec;
 659 extern const bfd_target ecoffalpha_little_vec;
 660 extern const bfd_target go32coff_vec;
 661 extern const bfd_target go32stubbedcoff_vec;
 662 extern const bfd_target h8300coff_vec;
 663 extern const bfd_target h8500coff_vec;
 664 extern const bfd_target host_aout_vec;
 665 extern const bfd_target hp300bsd_vec;
 666 extern const bfd_target hp300hpux_vec;
 667 extern const bfd_target i386aout_vec;
 668 extern const bfd_target i386bsd_vec;
 669 extern const bfd_target i386coff_vec;
 670 extern const bfd_target i386dynix_vec;
 671 extern const bfd_target i386freebsd_vec;
 672 extern const bfd_target i386linux_vec;
 673 extern const bfd_target i386lynx_aout_vec;
 674 extern const bfd_target i386lynx_coff_vec;
 675 extern const bfd_target i386mach3_vec;
 676 extern const bfd_target i386msdos_vec;
 677 extern const bfd_target i386netbsd_vec;
 678 extern const bfd_target i386os9k_vec;
 679 extern const bfd_target i386pe_vec;
 680 extern const bfd_target i386pei_vec;
 681 extern const bfd_target i860coff_vec;
 682 extern const bfd_target icoff_big_vec;
 683 extern const bfd_target icoff_little_vec;
 684 extern const bfd_target ieee_vec;
 685 extern const bfd_target m68k4knetbsd_vec;
 686 extern const bfd_target m68kaux_coff_vec;
 687 extern const bfd_target m68kcoff_vec;
 688 extern const bfd_target m68kcoffun_vec;
 689 extern const bfd_target m68klinux_vec;
 690 extern const bfd_target m68klynx_aout_vec;
 691 extern const bfd_target m68klynx_coff_vec;
 692 extern const bfd_target m68knetbsd_vec;
 693 extern const bfd_target m68ksysvcoff_vec;
 694 extern const bfd_target m88kbcs_vec;
 695 extern const bfd_target m88kmach3_vec;
 696 extern const bfd_target m88kopenbsd_vec;
 697 extern const bfd_target mach_o_be_vec;
 698 extern const bfd_target mach_o_le_vec;
 699 extern const bfd_target mach_o_fat_vec;
 700 extern const bfd_target maxqcoff_vec;
 701 extern const bfd_target mcore_pe_big_vec;
 702 extern const bfd_target mcore_pe_little_vec;
 703 extern const bfd_target mcore_pei_big_vec;
 704 extern const bfd_target mcore_pei_little_vec;
 705 extern const bfd_target mipslpe_vec;
 706 extern const bfd_target mipslpei_vec;
 707 extern const bfd_target newsos3_vec;
 708 extern const bfd_target nlm32_alpha_vec;
 709 extern const bfd_target nlm32_i386_vec;
 710 extern const bfd_target nlm32_powerpc_vec;
 711 extern const bfd_target nlm32_sparc_vec;
 712 extern const bfd_target oasys_vec;
 713 extern const bfd_target or32coff_big_vec;
 714 extern const bfd_target pc532machaout_vec;
 715 extern const bfd_target pc532netbsd_vec;
 716 extern const bfd_target pdp11_aout_vec;
 717 extern const bfd_target pef_vec;
 718 extern const bfd_target pef_xlib_vec;
 719 extern const bfd_target pmac_xcoff_vec;
 720 extern const bfd_target ppcboot_vec;
 721 extern const bfd_target riscix_vec;
 722 extern const bfd_target rs6000coff64_vec;
 723 extern const bfd_target rs6000coff_vec;
 724 extern const bfd_target shcoff_small_vec;
 725 extern const bfd_target shcoff_vec;
 726 extern const bfd_target shlcoff_small_vec;
 727 extern const bfd_target shlcoff_vec;
 728 extern const bfd_target shlpe_vec;
 729 extern const bfd_target shlpei_vec;
 730 extern const bfd_target som_vec;
 731 extern const bfd_target sparccoff_vec;
 732 extern const bfd_target sparcle_aout_vec;
 733 extern const bfd_target sparclinux_vec;
 734 extern const bfd_target sparclynx_aout_vec;
 735 extern const bfd_target sparclynx_coff_vec;
 736 extern const bfd_target sparcnetbsd_vec;
 737 extern const bfd_target sunos_big_vec;
 738 extern const bfd_target sym_vec;
 739 extern const bfd_target tic30_aout_vec;
 740 extern const bfd_target tic30_coff_vec;
 741 extern const bfd_target tic4x_coff0_beh_vec;
 742 extern const bfd_target tic4x_coff0_vec;
 743 extern const bfd_target tic4x_coff1_beh_vec;
 744 extern const bfd_target tic4x_coff1_vec;
 745 extern const bfd_target tic4x_coff2_beh_vec;
 746 extern const bfd_target tic4x_coff2_vec;
 747 extern const bfd_target tic54x_coff0_beh_vec;
 748 extern const bfd_target tic54x_coff0_vec;
 749 extern const bfd_target tic54x_coff1_beh_vec;
 750 extern const bfd_target tic54x_coff1_vec;
 751 extern const bfd_target tic54x_coff2_beh_vec;
 752 extern const bfd_target tic54x_coff2_vec;
 753 extern const bfd_target tic80coff_vec;
 754 extern const bfd_target vaxbsd_vec;
 755 extern const bfd_target vaxnetbsd_vec;
 756 extern const bfd_target vax1knetbsd_vec;
 757 extern const bfd_target versados_vec;
 758 extern const bfd_target vms_alpha_vec;
 759 extern const bfd_target vms_vax_vec;
 760 extern const bfd_target w65_vec;
 761 extern const bfd_target we32kcoff_vec;
 762 extern const bfd_target z8kcoff_vec;
 763
 764 /* These are always included.  */
 765 extern const bfd_target srec_vec;
 766 extern const bfd_target symbolsrec_vec;
 767 extern const bfd_target tekhex_vec;
 768 extern const bfd_target binary_vec;
 769 extern const bfd_target ihex_vec;
 770
 771 /* All of the xvecs for core files.  */
 772 extern const bfd_target aix386_core_vec;
 773 extern const bfd_target cisco_core_big_vec;
 774 extern const bfd_target cisco_core_little_vec;
 775 extern const bfd_target hppabsd_core_vec;
 776 extern const bfd_target hpux_core_vec;
 777 extern const bfd_target irix_core_vec;
 778 extern const bfd_target netbsd_core_vec;
 779 extern const bfd_target osf_core_vec;
 780 extern const bfd_target ptrace_core_vec;
 781 extern const bfd_target sco5_core_vec;
 782 extern const bfd_target trad_core_vec;
 783
 784 extern const bfd_target bfd_elf32_am33lin_vec;
 785 static const bfd_target * const _bfd_target_vector[] = {
 786
 787 #ifdef SELECT_VECS
 788
 789         SELECT_VECS,
 790
 791 #else /* not SELECT_VECS */
 792
 793 #ifdef DEFAULT_VECTOR
 794         &DEFAULT_VECTOR,
 795 #endif
 796         /* This list is alphabetized to make it easy to compare
 797            with other vector lists -- the decls above and
 798            the case statement in configure.in.
 799            Vectors that don't compile on all systems, or aren't finished,
 800            should have an entry here with #if 0 around it, to show that
 801            it wasn't omitted by mistake.  */
 802         &a29kcoff_big_vec,
 803         &a_out_adobe_vec,
 804 #ifdef BFD64
 805         &aix5coff64_vec,
 806 #endif
 807         &aout0_big_vec,
 808 #if 0
 809         /* We have no way of distinguishing these from other a.out variants.  */
 810         &aout_arm_big_vec,
 811         &aout_arm_little_vec,
 812         /* No one seems to use this.  */
 813         &aout_mips_big_vec,
 814 #endif
 815         &aout_mips_little_vec,
 816 #if 0
 817         &apollocoff_vec,
 818 #endif
 819         &arm_epoc_pe_big_vec,
 820         &arm_epoc_pe_little_vec,
 821         &arm_epoc_pei_big_vec,
 822         &arm_epoc_pei_little_vec,
 823         &armcoff_big_vec,
 824         &armcoff_little_vec,
 825         &armnetbsd_vec,
 826         &armpe_big_vec,
 827         &armpe_little_vec,
 828         &armpei_big_vec,
 829         &armpei_little_vec,
 830         &b_out_vec_big_host,
 831         &b_out_vec_little_host,
 832         &bfd_efi_app_ia32_vec,
 833 #ifdef BFD64
 834         &bfd_efi_app_ia64_vec,
 835 #endif
 836         &bfd_elf32_avr_vec,
 837
 838         /* This, and other vectors, may not be used in any *.mt configuration.
 839            But that does not mean they are unnecessary.  If configured with
 840            --enable-targets=all, objdump or gdb should be able to examine
 841            the file even if we don't recognize the machine type.  */
 842         &bfd_elf32_big_generic_vec,
 843         &bfd_elf32_bigarc_vec,
 844         &bfd_elf32_bigarm_vec,
 845         &bfd_elf32_bigarm_symbian_vec,
 846         &bfd_elf32_bigarm_vxworks_vec,
 847         &bfd_elf32_bigmips_vec,
 848         &bfd_elf32_cr16c_vec,
 849         &bfd_elf32_cris_vec,
 850         &bfd_elf32_crx_vec,
 851         &bfd_elf32_d10v_vec,
 852         &bfd_elf32_d30v_vec,
 853         &bfd_elf32_dlx_big_vec,
 854         &bfd_elf32_fr30_vec,
 855         &bfd_elf32_frv_vec,
 856         &bfd_elf32_frvfdpic_vec,
 857         &bfd_elf32_h8300_vec,
 858         &bfd_elf32_hppa_linux_vec,
 859         &bfd_elf32_hppa_nbsd_vec,
 860         &bfd_elf32_hppa_vec,
 861         &bfd_elf32_i370_vec,
 862         &bfd_elf32_i386_freebsd_vec,
 863         &bfd_elf32_i386_vec,
 864         &bfd_elf32_i860_little_vec,
 865         &bfd_elf32_i860_vec,
 866         &bfd_elf32_i960_vec,
 867 #if 0
 868         &bfd_elf32_ia64_big_vec,
 869 #endif
 870         &bfd_elf32_ia64_hpux_big_vec,
 871         &bfd_elf32_ip2k_vec,
 872         &bfd_elf32_iq2000_vec,
 873         &bfd_elf32_little_generic_vec,
 874         &bfd_elf32_littlearc_vec,
 875         &bfd_elf32_littlearm_vec,
 876         &bfd_elf32_littlearm_symbian_vec,
 877         &bfd_elf32_littlearm_vxworks_vec,
 878         &bfd_elf32_littlemips_vec,
 879         &bfd_elf32_m32r_vec,
 880         &bfd_elf32_m32rle_vec,
 881         &bfd_elf32_m32rlin_vec,
 882         &bfd_elf32_m32rlelin_vec,
 883         &bfd_elf32_m68hc11_vec,
 884         &bfd_elf32_m68hc12_vec,
 885         &bfd_elf32_m68k_vec,
 886         &bfd_elf32_m88k_vec,
 887         &bfd_elf32_mcore_big_vec,
 888         &bfd_elf32_mcore_little_vec,
 889         &bfd_elf32_mn10200_vec,
 890         &bfd_elf32_mn10300_vec,
 891         &bfd_elf32_msp430_vec,
 892 #ifdef BFD64
 893         &bfd_elf32_nbigmips_vec,
 894         &bfd_elf32_nlittlemips_vec,
 895         &bfd_elf32_ntradbigmips_vec,
 896         &bfd_elf32_ntradlittlemips_vec,
 897 #endif
 898         &bfd_elf32_openrisc_vec,
 899         &bfd_elf32_or32_big_vec,
 900         &bfd_elf32_pj_vec,
 901         &bfd_elf32_pjl_vec,
 902         &bfd_elf32_powerpc_vec,
 903         &bfd_elf32_powerpcle_vec,
 904         &bfd_elf32_s390_vec,
 905         &bfd_elf32_sh_vec,
 906         &bfd_elf32_shblin_vec,
 907         &bfd_elf32_shl_vec,
 908         &bfd_elf32_shl_symbian_vec,
 909         &bfd_elf32_shlin_vec,
 910         &bfd_elf32_shlnbsd_vec,
 911         &bfd_elf32_shnbsd_vec,
 912 #ifdef BFD64
 913         &bfd_elf32_sh64_vec,
 914         &bfd_elf32_sh64l_vec,
 915         &bfd_elf32_sh64lnbsd_vec,
 916         &bfd_elf32_sh64nbsd_vec,
 917         &bfd_elf32_sh64lin_vec,
 918         &bfd_elf32_sh64blin_vec,
 919 #endif
 920         &bfd_elf32_sparc_vec,
 921         &bfd_elf32_tradbigmips_vec,
 922         &bfd_elf32_tradlittlemips_vec,
 923         &bfd_elf32_us_cris_vec,
 924         &bfd_elf32_v850_vec,
 925         &bfd_elf32_vax_vec,
 926         &bfd_elf32_xstormy16_vec,
 927         &bfd_elf32_xtensa_be_vec,
 928         &bfd_elf32_xtensa_le_vec,
 929 #ifdef BFD64
 930         &bfd_elf64_alpha_freebsd_vec,
 931         &bfd_elf64_alpha_vec,
 932         &bfd_elf64_big_generic_vec,
 933         &bfd_elf64_bigmips_vec,
 934         &bfd_elf64_hppa_linux_vec,
 935         &bfd_elf64_hppa_vec,
 936         &bfd_elf64_ia64_big_vec,
 937         &bfd_elf64_ia64_hpux_big_vec,
 938         &bfd_elf64_ia64_little_vec,
 939         &bfd_elf64_little_generic_vec,
 940         &bfd_elf64_littlemips_vec,
 941         &bfd_elf64_mmix_vec,
 942         &bfd_elf64_powerpc_vec,
 943         &bfd_elf64_powerpcle_vec,
 944         &bfd_elf64_s390_vec,
 945         &bfd_elf64_sh64_vec,
 946         &bfd_elf64_sh64l_vec,
 947         &bfd_elf64_sh64lnbsd_vec,
 948         &bfd_elf64_sh64nbsd_vec,
 949         &bfd_elf64_sh64lin_vec,
 950         &bfd_elf64_sh64blin_vec,
 951         &bfd_elf64_sparc_vec,
 952         &bfd_elf64_tradbigmips_vec,
 953         &bfd_elf64_tradlittlemips_vec,
 954         &bfd_elf64_x86_64_vec,
 955         &bfd_mmo_vec,
 956 #endif
 957         &bfd_powerpc_pe_vec,
 958         &bfd_powerpc_pei_vec,
 959         &bfd_powerpcle_pe_vec,
 960         &bfd_powerpcle_pei_vec,
 961         &cris_aout_vec,
 962 #ifdef BFD64
 963         &demo_64_vec,   /* Only compiled if host has long-long support.  */
 964 #endif
 965         &ecoff_big_vec,
 966         &ecoff_biglittle_vec,
 967         &ecoff_little_vec,
 968 #ifdef BFD64
 969         &ecoffalpha_little_vec,
 970 #endif
 971         &go32coff_vec,
 972         &go32stubbedcoff_vec,
 973         &h8300coff_vec,
 974         &h8500coff_vec,
 975 #if 0
 976         /* Since a.out files lack decent magic numbers, no way to recognize
 977            which kind of a.out file it is.  */
 978         &host_aout_vec,
 979         /* Clashes with sunos_big_vec magic no.  */
 980         &hp300bsd_vec,
 981 #endif
 982         &hp300hpux_vec,
 983         &i386aout_vec,
 984         &i386bsd_vec,
 985         &i386coff_vec,
 986 #if 0
 987         &i386dynix_vec,
 988 #endif
 989         &i386freebsd_vec,
 990 #if 0
 991         /* Since a.out files lack decent magic numbers, no way to recognize
 992            which kind of a.out file it is.  */
 993         &i386linux_vec,
 994 #endif
 995         &i386lynx_aout_vec,
 996         &i386lynx_coff_vec,
 997 #if 0
 998         /* No distinguishing features for Mach 3 executables.  */
 999         &i386mach3_vec,
1000 #endif
1001         &i386msdos_vec,
1002         &i386netbsd_vec,
1003         &i386os9k_vec,
1004         &i386pe_vec,
1005         &i386pei_vec,
1006         &i860coff_vec,
1007         &icoff_big_vec,
1008         &icoff_little_vec,
1009         &ieee_vec,
1010 #if 0
1011         &m68k4knetbsd_vec,
1012         &m68kaux_coff_vec,
1013 #endif
1014         &m68kcoff_vec,
1015         &m68kcoffun_vec,
1016 #if 0
1017         /* Since a.out files lack decent magic numbers, no way to recognize
1018            which kind of a.out file it is.  */
1019         &m68klinux_vec,
1020 #endif
1021         &m68klynx_aout_vec,
1022         &m68klynx_coff_vec,
1023         &m68knetbsd_vec,
1024         &m68ksysvcoff_vec,
1025         &m88kbcs_vec,
1026         &m88kmach3_vec,
1027         &m88kopenbsd_vec,
1028         &mach_o_be_vec,
1029         &mach_o_le_vec,
1030         &mach_o_fat_vec,
1031         &maxqcoff_vec,
1032         &mcore_pe_big_vec,
1033         &mcore_pe_little_vec,
1034         &mcore_pei_big_vec,
1035         &mcore_pei_little_vec,
1036         &mipslpe_vec,
1037         &mipslpei_vec,
1038         &newsos3_vec,
1039 #ifdef BFD64
1040         &nlm32_alpha_vec,
1041 #endif
1042         &nlm32_i386_vec,
1043         &nlm32_powerpc_vec,
1044         &nlm32_sparc_vec,
1045 #if 0
1046         /* We have no oasys tools anymore, so we can't test any of this
1047            anymore. If you want to test the stuff yourself, go ahead...
1048            steve@cygnus.com
1049            Worse, since there is no magic number for archives, there
1050            can be annoying target mis-matches.  */
1051         &oasys_vec,
1052 #endif
1053         /* Entry for the OpenRISC family.  */
1054         &or32coff_big_vec,
1055
1056         &pc532machaout_vec,
1057         &pc532netbsd_vec,
1058         &pdp11_aout_vec,
1059         &pef_vec,
1060         &pef_xlib_vec,
1061 #if 0
1062         /* This has the same magic number as RS/6000.  */
1063         &pmac_xcoff_vec,
1064 #endif
1065         &ppcboot_vec,
1066 #if 0
1067         /* We have no way of distinguishing these from other a.out variants.  */
1068         &riscix_vec,
1069 #endif
1070 #ifdef BFD64
1071         &rs6000coff64_vec,
1072 #endif
1073         &rs6000coff_vec,
1074         &shcoff_small_vec,
1075         &shcoff_vec,
1076         &shlcoff_small_vec,
1077         &shlcoff_vec,
1078         &shlpe_vec,
1079         &shlpei_vec,
1080 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
1081         &som_vec,
1082 #endif
1083         &sparccoff_vec,
1084         &sparcle_aout_vec,
1085         &sparclinux_vec,
1086         &sparclynx_aout_vec,
1087         &sparclynx_coff_vec,
1088         &sparcnetbsd_vec,
1089         &sunos_big_vec,
1090         &sym_vec,
1091         &tic30_aout_vec,
1092         &tic30_coff_vec,
1093         &tic54x_coff0_beh_vec,
1094         &tic54x_coff0_vec,
1095         &tic54x_coff1_beh_vec,
1096         &tic54x_coff1_vec,
1097         &tic54x_coff2_beh_vec,
1098         &tic54x_coff2_vec,
1099         &tic80coff_vec,
1100         &vaxbsd_vec,
1101         &vaxnetbsd_vec,
1102         &vax1knetbsd_vec,
1103         &versados_vec,
1104 #ifdef BFD64
1105         &vms_alpha_vec,
1106 #endif
1107         &vms_vax_vec,
1108         &w65_vec,
1109         &we32kcoff_vec,
1110         &z8kcoff_vec,
1111         &bfd_elf32_am33lin_vec,
1112 #endif /* not SELECT_VECS */
1113
1114 /* Always support S-records, for convenience.  */
1115         &srec_vec,
1116         &symbolsrec_vec,
1117 /* And tekhex */
1118         &tekhex_vec,
1119 /* Likewise for binary output.  */
1120         &binary_vec,
1121 /* Likewise for ihex.  */
1122         &ihex_vec,
1123
1124 /* Add any required traditional-core-file-handler.  */
1125
1126 #ifdef AIX386_CORE
1127         &aix386_core_vec,
1128 #endif
1129 #if 0
1130         /* We don't include cisco_core_*_vec.  Although it has a magic number,
1131            the magic number isn't at the beginning of the file, and thus
1132            might spuriously match other kinds of files.  */
1133         &cisco_core_big_vec,
1134         &cisco_core_little_vec,
1135 #endif
1136 #ifdef HPPABSD_CORE
1137         &hppabsd_core_vec,
1138 #endif
1139 #ifdef HPUX_CORE
1140         &hpux_core_vec,
1141 #endif
1142 #ifdef IRIX_CORE
1143         &irix_core_vec,
1144 #endif
1145 #ifdef NETBSD_CORE
1146         &netbsd_core_vec,
1147 #endif
1148 #ifdef OSF_CORE
1149         &osf_core_vec,
1150 #endif
1151 #ifdef PTRACE_CORE
1152         &ptrace_core_vec,
1153 #endif
1154 #ifdef SCO5_CORE
1155         &sco5_core_vec,
1156 #endif
1157 #ifdef TRAD_CORE
1158         &trad_core_vec,
1159 #endif
1160
1161         NULL /* end of list marker */
1162 };
1163 const bfd_target * const *bfd_target_vector = _bfd_target_vector;
1164
1165 /* bfd_default_vector[0] contains either the address of the default vector,
1166    if there is one, or zero if there isn't.  */
1167
1168 const bfd_target *bfd_default_vector[] = {
1169 #ifdef DEFAULT_VECTOR
1170         &DEFAULT_VECTOR,
1171 #endif
1172         NULL
1173 };
1174
1175 /* bfd_associated_vector[] contains the associated target vectors used
1176    to reduce the ambiguity in bfd_check_format_matches.  */
1177
1178 static const bfd_target *_bfd_associated_vector[] = {
1179 #ifdef ASSOCIATED_VECS
1180         ASSOCIATED_VECS,
1181 #endif
1182         NULL
1183 };
1184 const bfd_target * const *bfd_associated_vector = _bfd_associated_vector;
1185
1186 /* When there is an ambiguous match, bfd_check_format_matches puts the
1187    names of the matching targets in an array.  This variable is the maximum
1188    number of entries that the array could possibly need.  */
1189 const size_t _bfd_target_vector_entries = sizeof (_bfd_target_vector)/sizeof (*_bfd_target_vector);
1190 \f
1191 /* This array maps configuration triplets onto BFD vectors.  */
1192
1193 struct targmatch
1194 {
1195   /* The configuration triplet.  */
1196   const char *triplet;
1197   /* The BFD vector.  If this is NULL, then the vector is found by
1198      searching forward for the next structure with a non NULL vector
1199      field.  */
1200   const bfd_target *vector;
1201 };
1202
1203 /* targmatch.h is built by Makefile out of config.bfd.  */
1204 static const struct targmatch bfd_target_match[] = {
1205 #include "targmatch.h"
1206   { NULL, NULL }
1207 };
1208
1209 /* Find a target vector, given a name or configuration triplet.  */
1210
1211 static const bfd_target *
1212 find_target (const char *name)
1213 {
1214   const bfd_target * const *target;
1215   const struct targmatch *match;
1216
1217   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1218     if (strcmp (name, (*target)->name) == 0)
1219       return *target;
1220
1221   /* If we couldn't match on the exact name, try matching on the
1222      configuration triplet.  FIXME: We should run the triplet through
1223      config.sub first, but that is hard.  */
1224   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
1225     {
1226       if (fnmatch (match->triplet, name, 0) == 0)
1227         {
1228           while (match->vector == NULL)
1229             ++match;
1230           return match->vector;
1231           break;
1232         }
1233     }
1234
1235   bfd_set_error (bfd_error_invalid_target);
1236   return NULL;
1237 }
1238
1239 /*
1240 FUNCTION
1241         bfd_set_default_target
1242
1243 SYNOPSIS
1244         bfd_boolean bfd_set_default_target (const char *name);
1245
1246 DESCRIPTION
1247         Set the default target vector to use when recognizing a BFD.
1248         This takes the name of the target, which may be a BFD target
1249         name or a configuration triplet.
1250 */
1251
1252 bfd_boolean
1253 bfd_set_default_target (const char *name)
1254 {
1255   const bfd_target *target;
1256
1257   if (bfd_default_vector[0] != NULL
1258       && strcmp (name, bfd_default_vector[0]->name) == 0)
1259     return TRUE;
1260
1261   target = find_target (name);
1262   if (target == NULL)
1263     return FALSE;
1264
1265   bfd_default_vector[0] = target;
1266   return TRUE;
1267 }
1268
1269 /*
1270 FUNCTION
1271         bfd_find_target
1272
1273 SYNOPSIS
1274         const bfd_target *bfd_find_target (const char *target_name, bfd *abfd);
1275
1276 DESCRIPTION
1277         Return a pointer to the transfer vector for the object target
1278         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
1279         one in the environment variable <<GNUTARGET>>; if that is null or not
1280         defined, then choose the first entry in the target list.
1281         Passing in the string "default" or setting the environment
1282         variable to "default" will cause the first entry in the target
1283         list to be returned, and "target_defaulted" will be set in the
1284         BFD.  This causes <<bfd_check_format>> to loop over all the
1285         targets to find the one that matches the file being read.
1286 */
1287
1288 const bfd_target *
1289 bfd_find_target (const char *target_name, bfd *abfd)
1290 {
1291   const char *targname;
1292   const bfd_target *target;
1293
1294   if (target_name != NULL)
1295     targname = target_name;
1296   else
1297     targname = getenv ("GNUTARGET");
1298
1299   /* This is safe; the vector cannot be null.  */
1300   if (targname == NULL || strcmp (targname, "default") == 0)
1301     {
1302       abfd->target_defaulted = TRUE;
1303       if (bfd_default_vector[0] != NULL)
1304         abfd->xvec = bfd_default_vector[0];
1305       else
1306         abfd->xvec = bfd_target_vector[0];
1307       return abfd->xvec;
1308     }
1309
1310   abfd->target_defaulted = FALSE;
1311
1312   target = find_target (targname);
1313   if (target == NULL)
1314     return NULL;
1315
1316   abfd->xvec = target;
1317   return target;
1318 }
1319
1320 /*
1321 FUNCTION
1322         bfd_target_list
1323
1324 SYNOPSIS
1325         const char ** bfd_target_list (void);
1326
1327 DESCRIPTION
1328         Return a freshly malloced NULL-terminated
1329         vector of the names of all the valid BFD targets. Do not
1330         modify the names.
1331
1332 */
1333
1334 const char **
1335 bfd_target_list (void)
1336 {
1337   int vec_length = 0;
1338   bfd_size_type amt;
1339 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1340   /* The native compiler on the HP9000/700 has a bug which causes it
1341      to loop endlessly when compiling this file.  This avoids it.  */
1342   volatile
1343 #endif
1344   const bfd_target * const *target;
1345   const  char **name_list, **name_ptr;
1346
1347   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1348     vec_length++;
1349
1350   amt = (vec_length + 1) * sizeof (char **);
1351   name_ptr = name_list = bfd_malloc (amt);
1352
1353   if (name_list == NULL)
1354     return NULL;
1355
1356   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1357     if (target == &bfd_target_vector[0]
1358         || *target != bfd_target_vector[0])
1359       *name_ptr++ = (*target)->name;
1360
1361   *name_ptr = NULL;
1362   return name_list;
1363 }
1364
1365 /*
1366 FUNCTION
1367         bfd_seach_for_target
1368
1369 SYNOPSIS
1370         const bfd_target *bfd_search_for_target
1371           (int (*search_func) (const bfd_target *, void *),
1372            void *);
1373
1374 DESCRIPTION
1375         Return a pointer to the first transfer vector in the list of
1376         transfer vectors maintained by BFD that produces a non-zero
1377         result when passed to the function @var{search_func}.  The
1378         parameter @var{data} is passed, unexamined, to the search
1379         function.
1380 */
1381
1382 const bfd_target *
1383 bfd_search_for_target (int (*search_func) (const bfd_target *, void *),
1384                        void *data)
1385 {
1386   const bfd_target * const *target;
1387
1388   for (target = bfd_target_vector; *target != NULL; target ++)
1389     if (search_func (*target, data))
1390       return *target;
1391
1392   return NULL;
1393 }