bfd/targets.c

   1 /* Generic target-file-type support for the BFD library.
   2    Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 1998
   3    Free Software Foundation, Inc.
   4    Written by Cygnus Support.
   5
   6 This file is part of BFD, the Binary File Descriptor library.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libbfd.h"
  25 #include "fnmatch.h"
  26
  27 /*
  28 SECTION
  29         Targets
  30
  31 DESCRIPTION
  32         Each port of BFD to a different machine requries the creation
  33         of a target back end. All the back end provides to the root
  34         part of BFD is a structure containing pointers to functions
  35         which perform certain low level operations on files. BFD
  36         translates the applications's requests through a pointer into
  37         calls to the back end routines.
  38
  39         When a file is opened with <<bfd_openr>>, its format and
  40         target are unknown. BFD uses various mechanisms to determine
  41         how to interpret the file. The operations performed are:
  42
  43         o Create a BFD by calling the internal routine
  44         <<_bfd_new_bfd>>, then call <<bfd_find_target>> with the
  45         target string supplied to <<bfd_openr>> and the new BFD pointer.
  46
  47         o If a null target string was provided to <<bfd_find_target>>,
  48         look up the environment variable <<GNUTARGET>> and use
  49         that as the target string.
  50
  51         o If the target string is still <<NULL>>, or the target string is
  52         <<default>>, then use the first item in the target vector
  53         as the target type, and set <<target_defaulted>> in the BFD to
  54         cause <<bfd_check_format>> to loop through all the targets.
  55         @xref{bfd_target}.  @xref{Formats}.
  56
  57         o Otherwise, inspect the elements in the target vector
  58         one by one, until a match on target name is found. When found,
  59         use it.
  60
  61         o Otherwise return the error <<bfd_error_invalid_target>> to
  62         <<bfd_openr>>.
  63
  64         o <<bfd_openr>> attempts to open the file using
  65         <<bfd_open_file>>, and returns the BFD.
  66
  67         Once the BFD has been opened and the target selected, the file
  68         format may be determined. This is done by calling
  69         <<bfd_check_format>> on the BFD with a suggested format.
  70         If <<target_defaulted>> has been set, each possible target
  71         type is tried to see if it recognizes the specified format.
  72         <<bfd_check_format>> returns <<true>> when the caller guesses right.
  73 @menu
  74 @* bfd_target::
  75 @end menu
  76 */
  77
  78
  79 /*
  80
  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
 135         FIXME, these names should be rationalised with the names of
 136         the entry points which call them. Too bad we can't have one
 137         macro to define them both!
 138
 139 .enum bfd_flavour {
 140 .  bfd_target_unknown_flavour,
 141 .  bfd_target_aout_flavour,
 142 .  bfd_target_coff_flavour,
 143 .  bfd_target_ecoff_flavour,
 144 .  bfd_target_elf_flavour,
 145 .  bfd_target_ieee_flavour,
 146 .  bfd_target_nlm_flavour,
 147 .  bfd_target_oasys_flavour,
 148 .  bfd_target_tekhex_flavour,
 149 .  bfd_target_srec_flavour,
 150 .  bfd_target_ihex_flavour,
 151 .  bfd_target_som_flavour,
 152 .  bfd_target_os9k_flavour,
 153 .  bfd_target_versados_flavour,
 154 .  bfd_target_msdos_flavour,
 155 .  bfd_target_ovax_flavour,
 156 .  bfd_target_evax_flavour
 157 .};
 158 .
 159 .enum bfd_endian { BFD_ENDIAN_BIG, BFD_ENDIAN_LITTLE, BFD_ENDIAN_UNKNOWN };
 160 .
 161 .{* Forward declaration.  *}
 162 .typedef struct bfd_link_info _bfd_link_info;
 163 .
 164 .typedef struct bfd_target
 165 .{
 166
 167 Identifies the kind of target, e.g., SunOS4, Ultrix, etc.
 168
 169 .  char *name;
 170
 171 The "flavour" of a back end is a general indication about the contents
 172 of a file.
 173
 174 .  enum bfd_flavour flavour;
 175
 176 The order of bytes within the data area of a file.
 177
 178 .  enum bfd_endian byteorder;
 179
 180 The order of bytes within the header parts of a file.
 181
 182 .  enum bfd_endian header_byteorder;
 183
 184 A mask of all the flags which an executable may have set -
 185 from the set <<BFD_NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.
 186
 187 .  flagword object_flags;
 188
 189 A mask of all the flags which a section may have set - from
 190 the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.
 191
 192 .  flagword section_flags;
 193
 194 The character normally found at the front of a symbol
 195 (if any), perhaps `_'.
 196
 197 .  char symbol_leading_char;
 198
 199 The pad character for file names within an archive header.
 200
 201 .  char ar_pad_char;
 202
 203 The maximum number of characters in an archive header.
 204
 205 .  unsigned short ar_max_namelen;
 206
 207 Entries for byte swapping for data. These are different from the other
 208 entry points, since they don't take a BFD asthe first argument.
 209 Certain other handlers could do the same.
 210
 211 .  bfd_vma      (*bfd_getx64) PARAMS ((const bfd_byte *));
 212 .  bfd_signed_vma (*bfd_getx_signed_64) PARAMS ((const bfd_byte *));
 213 .  void         (*bfd_putx64) PARAMS ((bfd_vma, bfd_byte *));
 214 .  bfd_vma      (*bfd_getx32) PARAMS ((const bfd_byte *));
 215 .  bfd_signed_vma (*bfd_getx_signed_32) PARAMS ((const bfd_byte *));
 216 .  void         (*bfd_putx32) PARAMS ((bfd_vma, bfd_byte *));
 217 .  bfd_vma      (*bfd_getx16) PARAMS ((const bfd_byte *));
 218 .  bfd_signed_vma (*bfd_getx_signed_16) PARAMS ((const bfd_byte *));
 219 .  void         (*bfd_putx16) PARAMS ((bfd_vma, bfd_byte *));
 220
 221 Byte swapping for the headers
 222
 223 .  bfd_vma      (*bfd_h_getx64) PARAMS ((const bfd_byte *));
 224 .  bfd_signed_vma (*bfd_h_getx_signed_64) PARAMS ((const bfd_byte *));
 225 .  void         (*bfd_h_putx64) PARAMS ((bfd_vma, bfd_byte *));
 226 .  bfd_vma      (*bfd_h_getx32) PARAMS ((const bfd_byte *));
 227 .  bfd_signed_vma (*bfd_h_getx_signed_32) PARAMS ((const bfd_byte *));
 228 .  void         (*bfd_h_putx32) PARAMS ((bfd_vma, bfd_byte *));
 229 .  bfd_vma      (*bfd_h_getx16) PARAMS ((const bfd_byte *));
 230 .  bfd_signed_vma (*bfd_h_getx_signed_16) PARAMS ((const bfd_byte *));
 231 .  void         (*bfd_h_putx16) PARAMS ((bfd_vma, bfd_byte *));
 232
 233 Format dependent routines: these are vectors of entry points
 234 within the target vector structure, one for each format to check.
 235
 236 Check the format of a file being read.  Return a <<bfd_target *>> or zero.
 237
 238 .  const struct bfd_target *(*_bfd_check_format[bfd_type_end]) PARAMS ((bfd *));
 239
 240 Set the format of a file being written.
 241
 242 .  boolean             (*_bfd_set_format[bfd_type_end]) PARAMS ((bfd *));
 243
 244 Write cached information into a file being written, at <<bfd_close>>.
 245
 246 .  boolean             (*_bfd_write_contents[bfd_type_end]) PARAMS ((bfd *));
 247
 248 The general target vector.
 249
 250 .
 251 .  {* Generic entry points.  *}
 252 .#define BFD_JUMP_TABLE_GENERIC(NAME)\
 253 .CAT(NAME,_close_and_cleanup),\
 254 .CAT(NAME,_bfd_free_cached_info),\
 255 .CAT(NAME,_new_section_hook),\
 256 .CAT(NAME,_get_section_contents),\
 257 .CAT(NAME,_get_section_contents_in_window)
 258 .
 259 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 260 .  boolean       (*_close_and_cleanup) PARAMS ((bfd *));
 261 .  {* Ask the BFD to free all cached information.  *}
 262 .  boolean (*_bfd_free_cached_info) PARAMS ((bfd *));
 263 .  {* Called when a new section is created.  *}
 264 .  boolean       (*_new_section_hook) PARAMS ((bfd *, sec_ptr));
 265 .  {* Read the contents of a section.  *}
 266 .  boolean       (*_bfd_get_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 267 .                                            file_ptr, bfd_size_type));
 268 .  boolean       (*_bfd_get_section_contents_in_window)
 269 .                          PARAMS ((bfd *, sec_ptr, bfd_window *,
 270 .                                   file_ptr, bfd_size_type));
 271 .
 272 .  {* Entry points to copy private data.  *}
 273 .#define BFD_JUMP_TABLE_COPY(NAME)\
 274 .CAT(NAME,_bfd_copy_private_bfd_data),\
 275 .CAT(NAME,_bfd_merge_private_bfd_data),\
 276 .CAT(NAME,_bfd_copy_private_section_data),\
 277 .CAT(NAME,_bfd_copy_private_symbol_data),\
 278 .CAT(NAME,_bfd_set_private_flags),\
 279 .CAT(NAME,_bfd_print_private_bfd_data)\
 280 .  {* Called to copy BFD general private data from one object file
 281 .     to another.  *}
 282 .  boolean       (*_bfd_copy_private_bfd_data) PARAMS ((bfd *, bfd *));
 283 .  {* Called to merge BFD general private data from one object file
 284 .     to a common output file when linking.  *}
 285 .  boolean       (*_bfd_merge_private_bfd_data) PARAMS ((bfd *, bfd *));
 286 .  {* Called to copy BFD private section data from one object file
 287 .     to another.  *}
 288 .  boolean       (*_bfd_copy_private_section_data) PARAMS ((bfd *, sec_ptr,
 289 .                                                       bfd *, sec_ptr));
 290 .  {* Called to copy BFD private symbol data from one symbol
 291 .     to another.  *}
 292 .  boolean       (*_bfd_copy_private_symbol_data) PARAMS ((bfd *, asymbol *,
 293 .                                                          bfd *, asymbol *));
 294 .  {* Called to set private backend flags *}
 295 .  boolean       (*_bfd_set_private_flags) PARAMS ((bfd *, flagword));
 296 .
 297 .  {* Called to print private BFD data *}
 298 .  boolean       (*_bfd_print_private_bfd_data) PARAMS ((bfd *, PTR));
 299 .
 300 .  {* Core file entry points.  *}
 301 .#define BFD_JUMP_TABLE_CORE(NAME)\
 302 .CAT(NAME,_core_file_failing_command),\
 303 .CAT(NAME,_core_file_failing_signal),\
 304 .CAT(NAME,_core_file_matches_executable_p)
 305 .  char *   (*_core_file_failing_command) PARAMS ((bfd *));
 306 .  int      (*_core_file_failing_signal) PARAMS ((bfd *));
 307 .  boolean  (*_core_file_matches_executable_p) PARAMS ((bfd *, bfd *));
 308 .
 309 .  {* Archive entry points.  *}
 310 .#define BFD_JUMP_TABLE_ARCHIVE(NAME)\
 311 .CAT(NAME,_slurp_armap),\
 312 .CAT(NAME,_slurp_extended_name_table),\
 313 .CAT(NAME,_construct_extended_name_table),\
 314 .CAT(NAME,_truncate_arname),\
 315 .CAT(NAME,_write_armap),\
 316 .CAT(NAME,_read_ar_hdr),\
 317 .CAT(NAME,_openr_next_archived_file),\
 318 .CAT(NAME,_get_elt_at_index),\
 319 .CAT(NAME,_generic_stat_arch_elt),\
 320 .CAT(NAME,_update_armap_timestamp)
 321 .  boolean  (*_bfd_slurp_armap) PARAMS ((bfd *));
 322 .  boolean  (*_bfd_slurp_extended_name_table) PARAMS ((bfd *));
 323 .  boolean  (*_bfd_construct_extended_name_table)
 324 .             PARAMS ((bfd *, char **, bfd_size_type *, const char **));
 325 .  void     (*_bfd_truncate_arname) PARAMS ((bfd *, CONST char *, char *));
 326 .  boolean  (*write_armap) PARAMS ((bfd *arch,
 327 .                              unsigned int elength,
 328 .                              struct orl *map,
 329 .                              unsigned int orl_count,
 330 .                              int stridx));
 331 .  PTR (*_bfd_read_ar_hdr_fn) PARAMS ((bfd *));
 332 .  bfd *    (*openr_next_archived_file) PARAMS ((bfd *arch, bfd *prev));
 333 .#define bfd_get_elt_at_index(b,i) BFD_SEND(b, _bfd_get_elt_at_index, (b,i))
 334 .  bfd *    (*_bfd_get_elt_at_index) PARAMS ((bfd *, symindex));
 335 .  int      (*_bfd_stat_arch_elt) PARAMS ((bfd *, struct stat *));
 336 .  boolean  (*_bfd_update_armap_timestamp) PARAMS ((bfd *));
 337 .
 338 .  {* Entry points used for symbols.  *}
 339 .#define BFD_JUMP_TABLE_SYMBOLS(NAME)\
 340 .CAT(NAME,_get_symtab_upper_bound),\
 341 .CAT(NAME,_get_symtab),\
 342 .CAT(NAME,_make_empty_symbol),\
 343 .CAT(NAME,_print_symbol),\
 344 .CAT(NAME,_get_symbol_info),\
 345 .CAT(NAME,_bfd_is_local_label_name),\
 346 .CAT(NAME,_get_lineno),\
 347 .CAT(NAME,_find_nearest_line),\
 348 .CAT(NAME,_bfd_make_debug_symbol),\
 349 .CAT(NAME,_read_minisymbols),\
 350 .CAT(NAME,_minisymbol_to_symbol)
 351 .  long  (*_bfd_get_symtab_upper_bound) PARAMS ((bfd *));
 352 .  long  (*_bfd_canonicalize_symtab) PARAMS ((bfd *,
 353 .                                             struct symbol_cache_entry **));
 354 .  struct symbol_cache_entry  *
 355 .                (*_bfd_make_empty_symbol) PARAMS ((bfd *));
 356 .  void          (*_bfd_print_symbol) PARAMS ((bfd *, PTR,
 357 .                                      struct symbol_cache_entry *,
 358 .                                      bfd_print_symbol_type));
 359 .#define bfd_print_symbol(b,p,s,e) BFD_SEND(b, _bfd_print_symbol, (b,p,s,e))
 360 .  void          (*_bfd_get_symbol_info) PARAMS ((bfd *,
 361 .                                      struct symbol_cache_entry *,
 362 .                                      symbol_info *));
 363 .#define bfd_get_symbol_info(b,p,e) BFD_SEND(b, _bfd_get_symbol_info, (b,p,e))
 364 .  boolean       (*_bfd_is_local_label_name) PARAMS ((bfd *, const char *));
 365 .
 366 .  alent *    (*_get_lineno) PARAMS ((bfd *, struct symbol_cache_entry *));
 367 .  boolean    (*_bfd_find_nearest_line) PARAMS ((bfd *abfd,
 368 .                    struct sec *section, struct symbol_cache_entry **symbols,
 369 .                    bfd_vma offset, CONST char **file, CONST char **func,
 370 .                    unsigned int *line));
 371 . {* Back-door to allow format-aware applications to create debug symbols
 372 .    while using BFD for everything else.  Currently used by the assembler
 373 .    when creating COFF files.  *}
 374 .  asymbol *  (*_bfd_make_debug_symbol) PARAMS ((
 375 .       bfd *abfd,
 376 .       void *ptr,
 377 .       unsigned long size));
 378 .#define bfd_read_minisymbols(b, d, m, s) \
 379 .  BFD_SEND (b, _read_minisymbols, (b, d, m, s))
 380 .  long  (*_read_minisymbols) PARAMS ((bfd *, boolean, PTR *,
 381 .                                      unsigned int *));
 382 .#define bfd_minisymbol_to_symbol(b, d, m, f) \
 383 .  BFD_SEND (b, _minisymbol_to_symbol, (b, d, m, f))
 384 .  asymbol *(*_minisymbol_to_symbol) PARAMS ((bfd *, boolean, const PTR,
 385 .                                             asymbol *));
 386 .
 387 .  {* Routines for relocs.  *}
 388 .#define BFD_JUMP_TABLE_RELOCS(NAME)\
 389 .CAT(NAME,_get_reloc_upper_bound),\
 390 .CAT(NAME,_canonicalize_reloc),\
 391 .CAT(NAME,_bfd_reloc_type_lookup)
 392 .  long  (*_get_reloc_upper_bound) PARAMS ((bfd *, sec_ptr));
 393 .  long  (*_bfd_canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **,
 394 .                                            struct symbol_cache_entry **));
 395 .  {* See documentation on reloc types.  *}
 396 .  reloc_howto_type *
 397 .       (*reloc_type_lookup) PARAMS ((bfd *abfd,
 398 .                                     bfd_reloc_code_real_type code));
 399 .
 400 .  {* Routines used when writing an object file.  *}
 401 .#define BFD_JUMP_TABLE_WRITE(NAME)\
 402 .CAT(NAME,_set_arch_mach),\
 403 .CAT(NAME,_set_section_contents)
 404 .  boolean    (*_bfd_set_arch_mach) PARAMS ((bfd *, enum bfd_architecture,
 405 .                    unsigned long));
 406 .  boolean       (*_bfd_set_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 407 .                                            file_ptr, bfd_size_type));
 408 .
 409 .  {* Routines used by the linker.  *}
 410 .#define BFD_JUMP_TABLE_LINK(NAME)\
 411 .CAT(NAME,_sizeof_headers),\
 412 .CAT(NAME,_bfd_get_relocated_section_contents),\
 413 .CAT(NAME,_bfd_relax_section),\
 414 .CAT(NAME,_bfd_link_hash_table_create),\
 415 .CAT(NAME,_bfd_link_add_symbols),\
 416 .CAT(NAME,_bfd_final_link),\
 417 .CAT(NAME,_bfd_link_split_section),\
 418 .CAT(NAME,_bfd_gc_sections)
 419 .  int        (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean));
 420 .  bfd_byte * (*_bfd_get_relocated_section_contents) PARAMS ((bfd *,
 421 .                    struct bfd_link_info *, struct bfd_link_order *,
 422 .                    bfd_byte *data, boolean relocateable,
 423 .                    struct symbol_cache_entry **));
 424 .
 425 .  boolean    (*_bfd_relax_section) PARAMS ((bfd *, struct sec *,
 426 .                    struct bfd_link_info *, boolean *again));
 427 .
 428 .  {* Create a hash table for the linker.  Different backends store
 429 .     different information in this table.  *}
 430 .  struct bfd_link_hash_table *(*_bfd_link_hash_table_create) PARAMS ((bfd *));
 431 .
 432 .  {* Add symbols from this object file into the hash table.  *}
 433 .  boolean (*_bfd_link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
 434 .
 435 .  {* Do a link based on the link_order structures attached to each
 436 .     section of the BFD.  *}
 437 .  boolean (*_bfd_final_link) PARAMS ((bfd *, struct bfd_link_info *));
 438 .
 439 .  {* Should this section be split up into smaller pieces during linking.  *}
 440 .  boolean (*_bfd_link_split_section) PARAMS ((bfd *, struct sec *));
 441 .
 442 .  {* Remove sections that are not referenced from the output.  *}
 443 .  boolean (*_bfd_gc_sections) PARAMS ((bfd *, struct bfd_link_info *));
 444 .
 445 .  {* Routines to handle dynamic symbols and relocs.  *}
 446 .#define BFD_JUMP_TABLE_DYNAMIC(NAME)\
 447 .CAT(NAME,_get_dynamic_symtab_upper_bound),\
 448 .CAT(NAME,_canonicalize_dynamic_symtab),\
 449 .CAT(NAME,_get_dynamic_reloc_upper_bound),\
 450 .CAT(NAME,_canonicalize_dynamic_reloc)
 451 .  {* Get the amount of memory required to hold the dynamic symbols. *}
 452 .  long  (*_bfd_get_dynamic_symtab_upper_bound) PARAMS ((bfd *));
 453 .  {* Read in the dynamic symbols.  *}
 454 .  long  (*_bfd_canonicalize_dynamic_symtab)
 455 .    PARAMS ((bfd *, struct symbol_cache_entry **));
 456 .  {* Get the amount of memory required to hold the dynamic relocs.  *}
 457 .  long  (*_bfd_get_dynamic_reloc_upper_bound) PARAMS ((bfd *));
 458 .  {* Read in the dynamic relocs.  *}
 459 .  long  (*_bfd_canonicalize_dynamic_reloc)
 460 .    PARAMS ((bfd *, arelent **, struct symbol_cache_entry **));
 461 .
 462
 463 Data for use by back-end routines, which isn't generic enough to belong
 464 in this structure.
 465
 466 . PTR backend_data;
 467 .} bfd_target;
 468
 469 */
 470
 471 /* All known xvecs (even those that don't compile on all systems).
 472    Alphabetized for easy reference.
 473    They are listed a second time below, since
 474    we can't intermix extern's and initializers.  */
 475 extern const bfd_target a29kcoff_big_vec;
 476 extern const bfd_target a_out_adobe_vec;
 477 extern const bfd_target aout_arm_big_vec;
 478 extern const bfd_target aout_arm_little_vec;
 479 extern const bfd_target aout_mips_big_vec;
 480 extern const bfd_target aout_mips_little_vec;
 481 extern const bfd_target aout0_big_vec;
 482 extern const bfd_target apollocoff_vec;
 483 extern const bfd_target armcoff_little_vec;
 484 extern const bfd_target armcoff_big_vec;
 485 extern const bfd_target armpe_little_vec;
 486 extern const bfd_target armpe_big_vec;
 487 extern const bfd_target armpei_little_vec;
 488 extern const bfd_target armpei_big_vec;
 489 extern const bfd_target arm_epoc_pe_little_vec;
 490 extern const bfd_target arm_epoc_pe_big_vec;
 491 extern const bfd_target arm_epoc_pei_little_vec;
 492 extern const bfd_target arm_epoc_pei_big_vec;
 493 extern const bfd_target b_out_vec_big_host;
 494 extern const bfd_target b_out_vec_little_host;
 495 extern const bfd_target bfd_elf64_alpha_vec;
 496 extern const bfd_target bfd_elf32_bigarc_vec;
 497 extern const bfd_target bfd_elf32_bigarm_vec;
 498 extern const bfd_target bfd_elf32_bigarm_oabi_vec;
 499 extern const bfd_target bfd_elf32_littlearc_vec;
 500 extern const bfd_target bfd_elf32_littlearm_vec;
 501 extern const bfd_target bfd_elf32_littlearm_oabi_vec;
 502 extern const bfd_target bfd_elf32_big_generic_vec;
 503 extern const bfd_target bfd_elf32_bigmips_vec;
 504 extern const bfd_target bfd_elf64_bigmips_vec;
 505 extern const bfd_target bfd_elf32_d10v_vec;
 506 extern const bfd_target bfd_elf32_d30v_vec;
 507 extern const bfd_target bfd_elf32_hppa_vec;
 508 extern const bfd_target bfd_elf32_i386_vec;
 509 extern const bfd_target bfd_elf32_i860_vec;
 510 extern const bfd_target bfd_elf32_little_generic_vec;
 511 extern const bfd_target bfd_elf32_littlemips_vec;
 512 extern const bfd_target bfd_elf64_littlemips_vec;
 513 extern const bfd_target bfd_elf32_m32r_vec;
 514 extern const bfd_target bfd_elf32_m68k_vec;
 515 extern const bfd_target bfd_elf32_m88k_vec;
 516 extern const bfd_target bfd_elf32_mn10200_vec;
 517 extern const bfd_target bfd_elf32_mn10300_vec;
 518 extern const bfd_target bfd_elf32_powerpc_vec;
 519 extern const bfd_target bfd_elf32_powerpcle_vec;
 520 extern const bfd_target bfd_elf32_sh_vec;
 521 extern const bfd_target bfd_elf32_shl_vec;
 522 extern const bfd_target bfd_elf32_sparc_vec;
 523 extern const bfd_target bfd_elf32_v850_vec;
 524 extern const bfd_target bfd_elf32_fr30_vec;
 525 extern const bfd_target bfd_elf32_mcore_big_vec;
 526 extern const bfd_target bfd_elf32_mcore_little_vec;
 527 extern const bfd_target bfd_elf64_big_generic_vec;
 528 extern const bfd_target bfd_elf64_little_generic_vec;
 529 extern const bfd_target bfd_elf64_sparc_vec;
 530 extern const bfd_target demo_64_vec;
 531 extern const bfd_target ecoff_big_vec;
 532 extern const bfd_target ecoff_little_vec;
 533 extern const bfd_target ecoff_biglittle_vec;
 534 extern const bfd_target ecoffalpha_little_vec;
 535 extern const bfd_target h8300coff_vec;
 536 extern const bfd_target h8500coff_vec;
 537 extern const bfd_target host_aout_vec;
 538 extern const bfd_target hp300bsd_vec;
 539 extern const bfd_target hp300hpux_vec;
 540 extern const bfd_target som_vec;
 541 extern const bfd_target i386aout_vec;
 542 extern const bfd_target i386bsd_vec;
 543 extern const bfd_target i386dynix_vec;
 544 extern const bfd_target i386freebsd_vec;
 545 extern const bfd_target i386os9k_vec;
 546 extern const bfd_target i386coff_vec;
 547 extern const bfd_target bfd_powerpc_pe_vec;
 548 extern const bfd_target bfd_powerpcle_pe_vec;
 549 extern const bfd_target bfd_powerpc_pei_vec;
 550 extern const bfd_target bfd_powerpcle_pei_vec;
 551 extern const bfd_target i386pe_vec;
 552 extern const bfd_target i386pei_vec;
 553 extern const bfd_target go32coff_vec;
 554 extern const bfd_target go32stubbedcoff_vec;
 555 extern const bfd_target i386linux_vec;
 556 extern const bfd_target i386lynx_aout_vec;
 557 extern const bfd_target i386lynx_coff_vec;
 558 extern const bfd_target i386mach3_vec;
 559 extern const bfd_target i386msdos_vec;
 560 extern const bfd_target i386netbsd_vec;
 561 extern const bfd_target i860coff_vec;
 562 extern const bfd_target icoff_big_vec;
 563 extern const bfd_target icoff_little_vec;
 564 extern const bfd_target ieee_vec;
 565 extern const bfd_target m68kaux_coff_vec;
 566 extern const bfd_target m68kcoff_vec;
 567 extern const bfd_target m68kcoffun_vec;
 568 extern const bfd_target m68klinux_vec;
 569 extern const bfd_target m68klynx_aout_vec;
 570 extern const bfd_target m68klynx_coff_vec;
 571 extern const bfd_target m68knetbsd_vec;
 572 extern const bfd_target m68ksysvcoff_vec;
 573 extern const bfd_target m68k4knetbsd_vec;
 574 extern const bfd_target m88kbcs_vec;
 575 extern const bfd_target m88kmach3_vec;
 576 extern const bfd_target mcore_pe_big_vec;
 577 extern const bfd_target mcore_pe_little_vec;
 578 extern const bfd_target mcore_pei_big_vec;
 579 extern const bfd_target mcore_pei_little_vec;
 580 extern const bfd_target newsos3_vec;
 581 extern const bfd_target nlm32_i386_vec;
 582 extern const bfd_target nlm32_sparc_vec;
 583 extern const bfd_target nlm32_alpha_vec;
 584 extern const bfd_target nlm32_powerpc_vec;
 585 extern const bfd_target pc532netbsd_vec;
 586 extern const bfd_target oasys_vec;
 587 extern const bfd_target pc532machaout_vec;
 588 extern const bfd_target ppcboot_vec;
 589 extern const bfd_target riscix_vec;
 590 extern const bfd_target pmac_xcoff_vec;
 591 extern const bfd_target rs6000coff_vec;
 592 extern const bfd_target shcoff_vec;
 593 extern const bfd_target shlcoff_vec;
 594 extern const bfd_target shcoff_small_vec;
 595 extern const bfd_target shlcoff_small_vec;
 596 extern const bfd_target sparcle_aout_vec;
 597 extern const bfd_target sparclinux_vec;
 598 extern const bfd_target sparclynx_aout_vec;
 599 extern const bfd_target sparclynx_coff_vec;
 600 extern const bfd_target sparcnetbsd_vec;
 601 extern const bfd_target sparccoff_vec;
 602 extern const bfd_target sunos_big_vec;
 603 extern const bfd_target tekhex_vec;
 604 extern const bfd_target tic30_aout_vec;
 605 extern const bfd_target tic30_coff_vec;
 606 extern const bfd_target tic80coff_vec;
 607 extern const bfd_target vaxnetbsd_vec;
 608 extern const bfd_target versados_vec;
 609 extern const bfd_target vms_alpha_vec;
 610 extern const bfd_target vms_vax_vec;
 611 extern const bfd_target we32kcoff_vec;
 612 extern const bfd_target w65_vec;
 613 extern const bfd_target z8kcoff_vec;
 614
 615 /* srec is always included.  */
 616 extern const bfd_target srec_vec;
 617 extern const bfd_target symbolsrec_vec;
 618
 619 /* binary is always included.  */
 620 extern const bfd_target binary_vec;
 621
 622 /* ihex is always included.  */
 623 extern const bfd_target ihex_vec;
 624
 625 /* All of the xvecs for core files.  */
 626 extern const bfd_target aix386_core_vec;
 627 extern const bfd_target cisco_core_vec;
 628 extern const bfd_target hpux_core_vec;
 629 extern const bfd_target hppabsd_core_vec;
 630 extern const bfd_target irix_core_vec;
 631 extern const bfd_target netbsd_core_vec;
 632 extern const bfd_target osf_core_vec;
 633 extern const bfd_target sco5_core_vec;
 634 extern const bfd_target trad_core_vec;
 635 extern const bfd_target ptrace_core_vec;
 636
 637 const bfd_target * const bfd_target_vector[] = {
 638
 639 #ifdef SELECT_VECS
 640
 641         SELECT_VECS,
 642
 643 #else /* not SELECT_VECS */
 644
 645 #ifdef DEFAULT_VECTOR
 646         &DEFAULT_VECTOR,
 647 #endif
 648         /* This list is alphabetized to make it easy to compare
 649            with other vector lists -- the decls above and
 650            the case statement in configure.in.
 651            Vectors that don't compile on all systems, or aren't finished,
 652            should have an entry here with #if 0 around it, to show that
 653            it wasn't omitted by mistake.  */
 654         &a29kcoff_big_vec,
 655         &a_out_adobe_vec,
 656 #if 0                           /* No one seems to use this.  */
 657         &aout_mips_big_vec,
 658 #endif
 659         &aout_mips_little_vec,
 660         &b_out_vec_big_host,
 661         &b_out_vec_little_host,
 662
 663         /* This, and other vectors, may not be used in any *.mt configuration.
 664            But that does not mean they are unnecessary.  If configured with
 665            --enable-targets=all, objdump or gdb should be able to examine
 666            the file even if we don't recognize the machine type.  */
 667         &bfd_elf32_big_generic_vec,
 668 #ifdef BFD64
 669         &bfd_elf64_alpha_vec,
 670 #endif
 671         &bfd_elf32_bigarc_vec,
 672         &bfd_elf32_bigarm_vec,
 673         &bfd_elf32_bigarm_oabi_vec,
 674         &bfd_elf32_bigmips_vec,
 675 #ifdef BFD64
 676         &bfd_elf64_bigmips_vec,
 677 #endif
 678         &bfd_elf32_d10v_vec,
 679         &bfd_elf32_d30v_vec,
 680         &bfd_elf32_hppa_vec,
 681         &bfd_elf32_i386_vec,
 682         &bfd_elf32_i860_vec,
 683         &bfd_elf32_little_generic_vec,
 684         &bfd_elf32_littlearc_vec,
 685         &bfd_elf32_littlearm_vec,
 686         &bfd_elf32_littlearm_oabi_vec,
 687         &bfd_elf32_littlemips_vec,
 688 #ifdef BFD64
 689         &bfd_elf64_littlemips_vec,
 690 #endif
 691         &bfd_elf32_m32r_vec,
 692         &bfd_elf32_mn10200_vec,
 693         &bfd_elf32_mn10300_vec,
 694         &bfd_elf32_m68k_vec,
 695         &bfd_elf32_m88k_vec,
 696         &bfd_elf32_sparc_vec,
 697         &bfd_elf32_powerpc_vec,
 698         &bfd_elf32_powerpcle_vec,
 699         &bfd_elf32_v850_vec,
 700         &bfd_elf32_fr30_vec,
 701         &bfd_elf32_mcore_big_vec,
 702         &bfd_elf32_mcore_little_vec,
 703 #ifdef BFD64                    /* No one seems to use this.  */
 704         &bfd_elf64_big_generic_vec,
 705         &bfd_elf64_little_generic_vec,
 706 #endif
 707 #if 0
 708         &bfd_elf64_sparc_vec,
 709 #endif
 710         /* We don't include cisco_core_vec.  Although it has a magic number,
 711            the magic number isn't at the beginning of the file, and thus
 712            might spuriously match other kinds of files.  */
 713 #ifdef BFD64
 714         &demo_64_vec,   /* Only compiled if host has long-long support */
 715 #endif
 716         &ecoff_big_vec,
 717         &ecoff_little_vec,
 718         &ecoff_biglittle_vec,
 719 #ifdef BFD64
 720         &ecoffalpha_little_vec,
 721 #endif
 722         &h8300coff_vec,
 723         &h8500coff_vec,
 724 #if 0
 725         /* Since a.out files lack decent magic numbers, no way to recognize
 726            which kind of a.out file it is.  */
 727         &host_aout_vec,
 728 #endif
 729 #if 0                           /* Clashes with sunos_big_vec magic no.  */
 730         &hp300bsd_vec,
 731 #endif
 732         &hp300hpux_vec,
 733 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
 734         &som_vec,
 735 #endif
 736         &i386aout_vec,
 737         &i386bsd_vec,
 738         &i386coff_vec,
 739         &i386freebsd_vec,
 740         &i860coff_vec,
 741         &bfd_powerpc_pe_vec,
 742         &bfd_powerpcle_pe_vec,
 743         &bfd_powerpc_pei_vec,
 744         &bfd_powerpcle_pei_vec,
 745         &go32coff_vec,
 746         &go32stubbedcoff_vec,
 747 #if 0
 748         /* Since a.out files lack decent magic numbers, no way to recognize
 749            which kind of a.out file it is.  */
 750         &i386linux_vec,
 751 #endif
 752         &i386lynx_aout_vec,
 753         &i386lynx_coff_vec,
 754 #if 0
 755         /* No distinguishing features for Mach 3 executables.  */
 756         &i386mach3_vec,
 757 #endif
 758         &i386msdos_vec,
 759         &i386netbsd_vec,
 760         &i386os9k_vec,
 761         &i386pe_vec,
 762         &i386pei_vec,
 763         &armcoff_little_vec,
 764         &armcoff_big_vec,
 765         &armpe_little_vec,
 766         &armpe_big_vec,
 767         &armpei_little_vec,
 768         &armpei_big_vec,
 769         &arm_epoc_pe_little_vec,
 770         &arm_epoc_pe_big_vec,
 771         &arm_epoc_pei_little_vec,
 772         &arm_epoc_pei_big_vec,
 773         &icoff_big_vec,
 774         &icoff_little_vec,
 775         &ieee_vec,
 776         &m68kcoff_vec,
 777         &m68kcoffun_vec,
 778 #if 0
 779         /* Since a.out files lack decent magic numbers, no way to recognize
 780            which kind of a.out file it is.  */
 781         &m68klinux_vec,
 782 #endif
 783         &m68klynx_aout_vec,
 784         &m68klynx_coff_vec,
 785         &m68knetbsd_vec,
 786         &m68ksysvcoff_vec,
 787         &m88kbcs_vec,
 788         &m88kmach3_vec,
 789         &mcore_pe_big_vec,
 790         &mcore_pe_little_vec,
 791         &mcore_pei_big_vec,
 792         &mcore_pei_little_vec,
 793         &newsos3_vec,
 794         &nlm32_i386_vec,
 795         &nlm32_sparc_vec,
 796 #ifdef BFD64
 797         &nlm32_alpha_vec,
 798 #endif
 799         &pc532netbsd_vec,
 800 #if 0
 801         /* We have no oasys tools anymore, so we can't test any of this
 802            anymore. If you want to test the stuff yourself, go ahead...
 803            steve@cygnus.com
 804            Worse, since there is no magic number for archives, there
 805            can be annoying target mis-matches.  */
 806         &oasys_vec,
 807 #endif
 808         &pc532machaout_vec,
 809 #if 0
 810         /* We have no way of distinguishing these from other a.out variants */
 811         &aout_arm_big_vec,
 812         &aout_arm_little_vec,
 813         &riscix_vec,
 814 #endif
 815 #if 0
 816         /* This has the same magic number as RS/6000. */
 817         &pmac_xcoff_vec,
 818 #endif
 819         &rs6000coff_vec,
 820         &ppcboot_vec,
 821         &shcoff_vec,
 822         &shlcoff_vec,
 823         &shcoff_small_vec,
 824         &shlcoff_small_vec,
 825         &sparcle_aout_vec,
 826         &sparclinux_vec,
 827         &sparclynx_aout_vec,
 828         &sparclynx_coff_vec,
 829         &sparcnetbsd_vec,
 830         &sunos_big_vec,
 831         &aout0_big_vec,
 832         &tic30_aout_vec,
 833         &tic30_coff_vec,
 834         &tic80coff_vec,
 835         &vaxnetbsd_vec,
 836         &versados_vec,
 837 #ifdef BFD64
 838         &vms_alpha_vec,
 839 #endif
 840         &vms_vax_vec,
 841         &we32kcoff_vec,
 842         &z8kcoff_vec,
 843
 844 #endif /* not SELECT_VECS */
 845
 846 /* Always support S-records, for convenience.  */
 847         &srec_vec,
 848         &symbolsrec_vec,
 849 /* And tekhex */
 850         &tekhex_vec,
 851 /* Likewise for binary output.  */
 852         &binary_vec,
 853 /* Likewise for ihex.  */
 854         &ihex_vec,
 855
 856 /* Add any required traditional-core-file-handler.  */
 857
 858 #ifdef AIX386_CORE
 859         &aix386_core_vec,
 860 #endif
 861 #ifdef HPUX_CORE
 862         &hpux_core_vec,
 863 #endif
 864 #ifdef HPPABSD_CORE
 865         &hppabsd_core_vec,
 866 #endif
 867 #ifdef IRIX_CORE
 868         &irix_core_vec,
 869 #endif
 870 #ifdef NETBSD_CORE
 871         &netbsd_core_vec,
 872 #endif
 873 #ifdef OSF_CORE
 874         &osf_core_vec,
 875 #endif
 876 #ifdef SCO5_CORE
 877         &sco5_core_vec,
 878 #endif
 879 #ifdef  TRAD_CORE
 880         &trad_core_vec,
 881 #endif
 882
 883 #ifdef  PTRACE_CORE
 884         &ptrace_core_vec,
 885 #endif
 886
 887         NULL /* end of list marker */
 888 };
 889
 890 /* bfd_default_vector[0] contains either the address of the default vector,
 891    if there is one, or zero if there isn't.  */
 892
 893 const bfd_target *bfd_default_vector[] = {
 894 #ifdef DEFAULT_VECTOR
 895         &DEFAULT_VECTOR,
 896 #endif
 897         NULL
 898 };
 899
 900 /* When there is an ambiguous match, bfd_check_format_matches puts the
 901    names of the matching targets in an array.  This variable is the maximum
 902    number of entries that the array could possibly need.  */
 903 const size_t _bfd_target_vector_entries = sizeof(bfd_target_vector)/sizeof(*bfd_target_vector);
 904 \f
 905 /* This array maps configuration triplets onto BFD vectors.  */
 906
 907 struct targmatch
 908 {
 909   /* The configuration triplet.  */
 910   const char *triplet;
 911   /* The BFD vector.  If this is NULL, then the vector is found by
 912      searching forward for the next structure with a non NULL vector
 913      field.  */
 914   const bfd_target *vector;
 915 };
 916
 917 /* targmatch.h is built by Makefile out of config.bfd.  */
 918 static const struct targmatch bfd_target_match[] = {
 919 #include "targmatch.h"
 920   { NULL, NULL }
 921 };
 922
 923 static const bfd_target *find_target PARAMS ((const char *));
 924
 925 /* Find a target vector, given a name or configuration triplet.  */
 926
 927 static const bfd_target *
 928 find_target (name)
 929      const char *name;
 930 {
 931   const bfd_target * const *target;
 932   const struct targmatch *match;
 933
 934   for (target = &bfd_target_vector[0]; *target != NULL; target++)
 935     if (strcmp (name, (*target)->name) == 0)
 936       return *target;
 937
 938   /* If we couldn't match on the exact name, try matching on the
 939      configuration triplet.  FIXME: We should run the triplet through
 940      config.sub first, but that is hard.  */
 941   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
 942     {
 943       if (fnmatch (match->triplet, name, 0) == 0)
 944         {
 945           while (match->vector == NULL)
 946             ++match;
 947           return match->vector;
 948           break;
 949         }
 950     }
 951
 952   bfd_set_error (bfd_error_invalid_target);
 953   return NULL;
 954 }
 955
 956 /*
 957 FUNCTION
 958         bfd_set_default_target
 959
 960 SYNOPSIS
 961         boolean bfd_set_default_target (const char *name);
 962
 963 DESCRIPTION
 964         Set the default target vector to use when recognizing a BFD.
 965         This takes the name of the target, which may be a BFD target
 966         name or a configuration triplet.
 967 */
 968
 969 boolean
 970 bfd_set_default_target (name)
 971      const char *name;
 972 {
 973   const bfd_target *target;
 974
 975   if (bfd_default_vector[0] != NULL
 976       && strcmp (name, bfd_default_vector[0]->name) == 0)
 977     return true;
 978
 979   target = find_target (name);
 980   if (target == NULL)
 981     return false;
 982
 983   bfd_default_vector[0] = target;
 984   return true;
 985 }
 986
 987 /*
 988 FUNCTION
 989         bfd_find_target
 990
 991 SYNOPSIS
 992         const bfd_target *bfd_find_target(CONST char *target_name, bfd *abfd);
 993
 994 DESCRIPTION
 995         Return a pointer to the transfer vector for the object target
 996         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
 997         one in the environment variable <<GNUTARGET>>; if that is null or not
 998         defined, then choose the first entry in the target list.
 999         Passing in the string "default" or setting the environment
1000         variable to "default" will cause the first entry in the target
1001         list to be returned, and "target_defaulted" will be set in the
1002         BFD.  This causes <<bfd_check_format>> to loop over all the
1003         targets to find the one that matches the file being read.
1004 */
1005
1006 const bfd_target *
1007 bfd_find_target (target_name, abfd)
1008      const char *target_name;
1009      bfd *abfd;
1010 {
1011   const char *targname;
1012   const bfd_target *target;
1013
1014   if (target_name != NULL)
1015     targname = target_name;
1016   else
1017     targname = getenv ("GNUTARGET");
1018
1019   /* This is safe; the vector cannot be null */
1020   if (targname == NULL || strcmp (targname, "default") == 0)
1021     {
1022       abfd->target_defaulted = true;
1023       if (bfd_default_vector[0] != NULL)
1024         abfd->xvec = bfd_default_vector[0];
1025       else
1026         abfd->xvec = bfd_target_vector[0];
1027       return abfd->xvec;
1028     }
1029
1030   abfd->target_defaulted = false;
1031
1032   target = find_target (targname);
1033   if (target == NULL)
1034     return NULL;
1035
1036   abfd->xvec = target;
1037   return target;
1038 }
1039
1040 /*
1041 FUNCTION
1042         bfd_target_list
1043
1044 SYNOPSIS
1045         const char **bfd_target_list(void);
1046
1047 DESCRIPTION
1048         Return a freshly malloced NULL-terminated
1049         vector of the names of all the valid BFD targets. Do not
1050         modify the names.
1051
1052 */
1053
1054 const char **
1055 bfd_target_list ()
1056 {
1057   int vec_length= 0;
1058 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1059   /* The native compiler on the HP9000/700 has a bug which causes it
1060      to loop endlessly when compiling this file.  This avoids it.  */
1061   volatile
1062 #endif
1063     const bfd_target * const *target;
1064   CONST  char **name_list, **name_ptr;
1065
1066   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1067     vec_length++;
1068
1069   name_ptr = name_list = (CONST char **)
1070     bfd_zmalloc ((vec_length + 1) * sizeof (char **));
1071
1072   if (name_list == NULL)
1073     return NULL;
1074
1075   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1076     *(name_ptr++) = (*target)->name;
1077
1078   return name_list;
1079 }