bfd/targets.c

   1 /* Generic target-file-type support for the BFD library.
   2    Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999
   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_i960_vec;
 511 extern const bfd_target bfd_elf32_little_generic_vec;
 512 extern const bfd_target bfd_elf32_littlemips_vec;
 513 extern const bfd_target bfd_elf64_littlemips_vec;
 514 extern const bfd_target bfd_elf32_m32r_vec;
 515 extern const bfd_target bfd_elf32_m68k_vec;
 516 extern const bfd_target bfd_elf32_m88k_vec;
 517 extern const bfd_target bfd_elf32_mn10200_vec;
 518 extern const bfd_target bfd_elf32_mn10300_vec;
 519 extern const bfd_target bfd_elf32_powerpc_vec;
 520 extern const bfd_target bfd_elf32_powerpcle_vec;
 521 extern const bfd_target bfd_elf32_sh_vec;
 522 extern const bfd_target bfd_elf32_shl_vec;
 523 extern const bfd_target bfd_elf32_sparc_vec;
 524 extern const bfd_target bfd_elf32_v850_vec;
 525 extern const bfd_target bfd_elf32_fr30_vec;
 526 extern const bfd_target bfd_elf32_mcore_big_vec;
 527 extern const bfd_target bfd_elf32_mcore_little_vec;
 528 extern const bfd_target bfd_elf64_big_generic_vec;
 529 extern const bfd_target bfd_elf64_little_generic_vec;
 530 extern const bfd_target bfd_elf64_sparc_vec;
 531 extern const bfd_target demo_64_vec;
 532 extern const bfd_target ecoff_big_vec;
 533 extern const bfd_target ecoff_little_vec;
 534 extern const bfd_target ecoff_biglittle_vec;
 535 extern const bfd_target ecoffalpha_little_vec;
 536 extern const bfd_target h8300coff_vec;
 537 extern const bfd_target h8500coff_vec;
 538 extern const bfd_target host_aout_vec;
 539 extern const bfd_target hp300bsd_vec;
 540 extern const bfd_target hp300hpux_vec;
 541 extern const bfd_target som_vec;
 542 extern const bfd_target i386aout_vec;
 543 extern const bfd_target i386bsd_vec;
 544 extern const bfd_target i386dynix_vec;
 545 extern const bfd_target i386freebsd_vec;
 546 extern const bfd_target i386os9k_vec;
 547 extern const bfd_target i386coff_vec;
 548 extern const bfd_target bfd_powerpc_pe_vec;
 549 extern const bfd_target bfd_powerpcle_pe_vec;
 550 extern const bfd_target bfd_powerpc_pei_vec;
 551 extern const bfd_target bfd_powerpcle_pei_vec;
 552 extern const bfd_target i386pe_vec;
 553 extern const bfd_target i386pei_vec;
 554 extern const bfd_target go32coff_vec;
 555 extern const bfd_target go32stubbedcoff_vec;
 556 extern const bfd_target i386linux_vec;
 557 extern const bfd_target i386lynx_aout_vec;
 558 extern const bfd_target i386lynx_coff_vec;
 559 extern const bfd_target i386mach3_vec;
 560 extern const bfd_target i386msdos_vec;
 561 extern const bfd_target i386netbsd_vec;
 562 extern const bfd_target i860coff_vec;
 563 extern const bfd_target icoff_big_vec;
 564 extern const bfd_target icoff_little_vec;
 565 extern const bfd_target ieee_vec;
 566 extern const bfd_target m68kaux_coff_vec;
 567 extern const bfd_target m68kcoff_vec;
 568 extern const bfd_target m68kcoffun_vec;
 569 extern const bfd_target m68klinux_vec;
 570 extern const bfd_target m68klynx_aout_vec;
 571 extern const bfd_target m68klynx_coff_vec;
 572 extern const bfd_target m68knetbsd_vec;
 573 extern const bfd_target m68ksysvcoff_vec;
 574 extern const bfd_target m68k4knetbsd_vec;
 575 extern const bfd_target m88kbcs_vec;
 576 extern const bfd_target m88kmach3_vec;
 577 extern const bfd_target mcore_pe_big_vec;
 578 extern const bfd_target mcore_pe_little_vec;
 579 extern const bfd_target mcore_pei_big_vec;
 580 extern const bfd_target mcore_pei_little_vec;
 581 extern const bfd_target newsos3_vec;
 582 extern const bfd_target nlm32_i386_vec;
 583 extern const bfd_target nlm32_sparc_vec;
 584 extern const bfd_target nlm32_alpha_vec;
 585 extern const bfd_target nlm32_powerpc_vec;
 586 extern const bfd_target pc532netbsd_vec;
 587 extern const bfd_target oasys_vec;
 588 extern const bfd_target pc532machaout_vec;
 589 extern const bfd_target ppcboot_vec;
 590 extern const bfd_target riscix_vec;
 591 extern const bfd_target pmac_xcoff_vec;
 592 extern const bfd_target rs6000coff_vec;
 593 extern const bfd_target shcoff_vec;
 594 extern const bfd_target shlcoff_vec;
 595 extern const bfd_target shcoff_small_vec;
 596 extern const bfd_target shlcoff_small_vec;
 597 extern const bfd_target sparcle_aout_vec;
 598 extern const bfd_target sparclinux_vec;
 599 extern const bfd_target sparclynx_aout_vec;
 600 extern const bfd_target sparclynx_coff_vec;
 601 extern const bfd_target sparcnetbsd_vec;
 602 extern const bfd_target sparccoff_vec;
 603 extern const bfd_target sunos_big_vec;
 604 extern const bfd_target tekhex_vec;
 605 extern const bfd_target tic30_aout_vec;
 606 extern const bfd_target tic30_coff_vec;
 607 extern const bfd_target tic80coff_vec;
 608 extern const bfd_target vaxnetbsd_vec;
 609 extern const bfd_target versados_vec;
 610 extern const bfd_target vms_alpha_vec;
 611 extern const bfd_target vms_vax_vec;
 612 extern const bfd_target we32kcoff_vec;
 613 extern const bfd_target w65_vec;
 614 extern const bfd_target z8kcoff_vec;
 615
 616 /* srec is always included.  */
 617 extern const bfd_target srec_vec;
 618 extern const bfd_target symbolsrec_vec;
 619
 620 /* binary is always included.  */
 621 extern const bfd_target binary_vec;
 622
 623 /* ihex is always included.  */
 624 extern const bfd_target ihex_vec;
 625
 626 /* All of the xvecs for core files.  */
 627 extern const bfd_target aix386_core_vec;
 628 extern const bfd_target cisco_core_vec;
 629 extern const bfd_target hpux_core_vec;
 630 extern const bfd_target hppabsd_core_vec;
 631 extern const bfd_target irix_core_vec;
 632 extern const bfd_target netbsd_core_vec;
 633 extern const bfd_target osf_core_vec;
 634 extern const bfd_target sco5_core_vec;
 635 extern const bfd_target trad_core_vec;
 636 extern const bfd_target ptrace_core_vec;
 637
 638 const bfd_target * const bfd_target_vector[] = {
 639
 640 #ifdef SELECT_VECS
 641
 642         SELECT_VECS,
 643
 644 #else /* not SELECT_VECS */
 645
 646 #ifdef DEFAULT_VECTOR
 647         &DEFAULT_VECTOR,
 648 #endif
 649         /* This list is alphabetized to make it easy to compare
 650            with other vector lists -- the decls above and
 651            the case statement in configure.in.
 652            Vectors that don't compile on all systems, or aren't finished,
 653            should have an entry here with #if 0 around it, to show that
 654            it wasn't omitted by mistake.  */
 655         &a29kcoff_big_vec,
 656         &a_out_adobe_vec,
 657 #if 0                           /* No one seems to use this.  */
 658         &aout_mips_big_vec,
 659 #endif
 660         &aout_mips_little_vec,
 661         &b_out_vec_big_host,
 662         &b_out_vec_little_host,
 663
 664         /* This, and other vectors, may not be used in any *.mt configuration.
 665            But that does not mean they are unnecessary.  If configured with
 666            --enable-targets=all, objdump or gdb should be able to examine
 667            the file even if we don't recognize the machine type.  */
 668         &bfd_elf32_big_generic_vec,
 669 #ifdef BFD64
 670         &bfd_elf64_alpha_vec,
 671 #endif
 672         &bfd_elf32_bigarc_vec,
 673         &bfd_elf32_bigarm_vec,
 674         &bfd_elf32_bigarm_oabi_vec,
 675         &bfd_elf32_bigmips_vec,
 676 #ifdef BFD64
 677         &bfd_elf64_bigmips_vec,
 678 #endif
 679         &bfd_elf32_d10v_vec,
 680         &bfd_elf32_d30v_vec,
 681         &bfd_elf32_hppa_vec,
 682         &bfd_elf32_i386_vec,
 683         &bfd_elf32_i860_vec,
 684         &bfd_elf32_i960_vec,
 685         &bfd_elf32_little_generic_vec,
 686         &bfd_elf32_littlearc_vec,
 687         &bfd_elf32_littlearm_vec,
 688         &bfd_elf32_littlearm_oabi_vec,
 689         &bfd_elf32_littlemips_vec,
 690 #ifdef BFD64
 691         &bfd_elf64_littlemips_vec,
 692 #endif
 693         &bfd_elf32_m32r_vec,
 694         &bfd_elf32_mn10200_vec,
 695         &bfd_elf32_mn10300_vec,
 696         &bfd_elf32_m68k_vec,
 697         &bfd_elf32_m88k_vec,
 698         &bfd_elf32_sparc_vec,
 699         &bfd_elf32_powerpc_vec,
 700         &bfd_elf32_powerpcle_vec,
 701         &bfd_elf32_v850_vec,
 702         &bfd_elf32_fr30_vec,
 703         &bfd_elf32_mcore_big_vec,
 704         &bfd_elf32_mcore_little_vec,
 705 #ifdef BFD64                    /* No one seems to use this.  */
 706         &bfd_elf64_big_generic_vec,
 707         &bfd_elf64_little_generic_vec,
 708 #endif
 709 #if 0
 710         &bfd_elf64_sparc_vec,
 711 #endif
 712         /* We don't include cisco_core_vec.  Although it has a magic number,
 713            the magic number isn't at the beginning of the file, and thus
 714            might spuriously match other kinds of files.  */
 715 #ifdef BFD64
 716         &demo_64_vec,   /* Only compiled if host has long-long support */
 717 #endif
 718         &ecoff_big_vec,
 719         &ecoff_little_vec,
 720         &ecoff_biglittle_vec,
 721 #ifdef BFD64
 722         &ecoffalpha_little_vec,
 723 #endif
 724         &h8300coff_vec,
 725         &h8500coff_vec,
 726 #if 0
 727         /* Since a.out files lack decent magic numbers, no way to recognize
 728            which kind of a.out file it is.  */
 729         &host_aout_vec,
 730 #endif
 731 #if 0                           /* Clashes with sunos_big_vec magic no.  */
 732         &hp300bsd_vec,
 733 #endif
 734         &hp300hpux_vec,
 735 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
 736         &som_vec,
 737 #endif
 738         &i386aout_vec,
 739         &i386bsd_vec,
 740         &i386coff_vec,
 741         &i386freebsd_vec,
 742         &i860coff_vec,
 743         &bfd_powerpc_pe_vec,
 744         &bfd_powerpcle_pe_vec,
 745         &bfd_powerpc_pei_vec,
 746         &bfd_powerpcle_pei_vec,
 747         &go32coff_vec,
 748         &go32stubbedcoff_vec,
 749 #if 0
 750         /* Since a.out files lack decent magic numbers, no way to recognize
 751            which kind of a.out file it is.  */
 752         &i386linux_vec,
 753 #endif
 754         &i386lynx_aout_vec,
 755         &i386lynx_coff_vec,
 756 #if 0
 757         /* No distinguishing features for Mach 3 executables.  */
 758         &i386mach3_vec,
 759 #endif
 760         &i386msdos_vec,
 761         &i386netbsd_vec,
 762         &i386os9k_vec,
 763         &i386pe_vec,
 764         &i386pei_vec,
 765         &armcoff_little_vec,
 766         &armcoff_big_vec,
 767         &armpe_little_vec,
 768         &armpe_big_vec,
 769         &armpei_little_vec,
 770         &armpei_big_vec,
 771         &arm_epoc_pe_little_vec,
 772         &arm_epoc_pe_big_vec,
 773         &arm_epoc_pei_little_vec,
 774         &arm_epoc_pei_big_vec,
 775         &icoff_big_vec,
 776         &icoff_little_vec,
 777         &ieee_vec,
 778         &m68kcoff_vec,
 779         &m68kcoffun_vec,
 780 #if 0
 781         /* Since a.out files lack decent magic numbers, no way to recognize
 782            which kind of a.out file it is.  */
 783         &m68klinux_vec,
 784 #endif
 785         &m68klynx_aout_vec,
 786         &m68klynx_coff_vec,
 787         &m68knetbsd_vec,
 788         &m68ksysvcoff_vec,
 789         &m88kbcs_vec,
 790         &m88kmach3_vec,
 791         &mcore_pe_big_vec,
 792         &mcore_pe_little_vec,
 793         &mcore_pei_big_vec,
 794         &mcore_pei_little_vec,
 795         &newsos3_vec,
 796         &nlm32_i386_vec,
 797         &nlm32_sparc_vec,
 798 #ifdef BFD64
 799         &nlm32_alpha_vec,
 800 #endif
 801         &pc532netbsd_vec,
 802 #if 0
 803         /* We have no oasys tools anymore, so we can't test any of this
 804            anymore. If you want to test the stuff yourself, go ahead...
 805            steve@cygnus.com
 806            Worse, since there is no magic number for archives, there
 807            can be annoying target mis-matches.  */
 808         &oasys_vec,
 809 #endif
 810         &pc532machaout_vec,
 811 #if 0
 812         /* We have no way of distinguishing these from other a.out variants */
 813         &aout_arm_big_vec,
 814         &aout_arm_little_vec,
 815         &riscix_vec,
 816 #endif
 817 #if 0
 818         /* This has the same magic number as RS/6000. */
 819         &pmac_xcoff_vec,
 820 #endif
 821         &rs6000coff_vec,
 822         &ppcboot_vec,
 823         &shcoff_vec,
 824         &shlcoff_vec,
 825         &shcoff_small_vec,
 826         &shlcoff_small_vec,
 827         &sparcle_aout_vec,
 828         &sparclinux_vec,
 829         &sparclynx_aout_vec,
 830         &sparclynx_coff_vec,
 831         &sparcnetbsd_vec,
 832         &sunos_big_vec,
 833         &aout0_big_vec,
 834         &tic30_aout_vec,
 835         &tic30_coff_vec,
 836         &tic80coff_vec,
 837         &vaxnetbsd_vec,
 838         &versados_vec,
 839 #ifdef BFD64
 840         &vms_alpha_vec,
 841 #endif
 842         &vms_vax_vec,
 843         &we32kcoff_vec,
 844         &z8kcoff_vec,
 845
 846 #endif /* not SELECT_VECS */
 847
 848 /* Always support S-records, for convenience.  */
 849         &srec_vec,
 850         &symbolsrec_vec,
 851 /* And tekhex */
 852         &tekhex_vec,
 853 /* Likewise for binary output.  */
 854         &binary_vec,
 855 /* Likewise for ihex.  */
 856         &ihex_vec,
 857
 858 /* Add any required traditional-core-file-handler.  */
 859
 860 #ifdef AIX386_CORE
 861         &aix386_core_vec,
 862 #endif
 863 #ifdef HPUX_CORE
 864         &hpux_core_vec,
 865 #endif
 866 #ifdef HPPABSD_CORE
 867         &hppabsd_core_vec,
 868 #endif
 869 #ifdef IRIX_CORE
 870         &irix_core_vec,
 871 #endif
 872 #ifdef NETBSD_CORE
 873         &netbsd_core_vec,
 874 #endif
 875 #ifdef OSF_CORE
 876         &osf_core_vec,
 877 #endif
 878 #ifdef SCO5_CORE
 879         &sco5_core_vec,
 880 #endif
 881 #ifdef  TRAD_CORE
 882         &trad_core_vec,
 883 #endif
 884
 885 #ifdef  PTRACE_CORE
 886         &ptrace_core_vec,
 887 #endif
 888
 889         NULL /* end of list marker */
 890 };
 891
 892 /* bfd_default_vector[0] contains either the address of the default vector,
 893    if there is one, or zero if there isn't.  */
 894
 895 const bfd_target *bfd_default_vector[] = {
 896 #ifdef DEFAULT_VECTOR
 897         &DEFAULT_VECTOR,
 898 #endif
 899         NULL
 900 };
 901
 902 /* When there is an ambiguous match, bfd_check_format_matches puts the
 903    names of the matching targets in an array.  This variable is the maximum
 904    number of entries that the array could possibly need.  */
 905 const size_t _bfd_target_vector_entries = sizeof(bfd_target_vector)/sizeof(*bfd_target_vector);
 906 \f
 907 /* This array maps configuration triplets onto BFD vectors.  */
 908
 909 struct targmatch
 910 {
 911   /* The configuration triplet.  */
 912   const char *triplet;
 913   /* The BFD vector.  If this is NULL, then the vector is found by
 914      searching forward for the next structure with a non NULL vector
 915      field.  */
 916   const bfd_target *vector;
 917 };
 918
 919 /* targmatch.h is built by Makefile out of config.bfd.  */
 920 static const struct targmatch bfd_target_match[] = {
 921 #include "targmatch.h"
 922   { NULL, NULL }
 923 };
 924
 925 static const bfd_target *find_target PARAMS ((const char *));
 926
 927 /* Find a target vector, given a name or configuration triplet.  */
 928
 929 static const bfd_target *
 930 find_target (name)
 931      const char *name;
 932 {
 933   const bfd_target * const *target;
 934   const struct targmatch *match;
 935
 936   for (target = &bfd_target_vector[0]; *target != NULL; target++)
 937     if (strcmp (name, (*target)->name) == 0)
 938       return *target;
 939
 940   /* If we couldn't match on the exact name, try matching on the
 941      configuration triplet.  FIXME: We should run the triplet through
 942      config.sub first, but that is hard.  */
 943   for (match = &bfd_target_match[0]; match->triplet != NULL; match++)
 944     {
 945       if (fnmatch (match->triplet, name, 0) == 0)
 946         {
 947           while (match->vector == NULL)
 948             ++match;
 949           return match->vector;
 950           break;
 951         }
 952     }
 953
 954   bfd_set_error (bfd_error_invalid_target);
 955   return NULL;
 956 }
 957
 958 /*
 959 FUNCTION
 960         bfd_set_default_target
 961
 962 SYNOPSIS
 963         boolean bfd_set_default_target (const char *name);
 964
 965 DESCRIPTION
 966         Set the default target vector to use when recognizing a BFD.
 967         This takes the name of the target, which may be a BFD target
 968         name or a configuration triplet.
 969 */
 970
 971 boolean
 972 bfd_set_default_target (name)
 973      const char *name;
 974 {
 975   const bfd_target *target;
 976
 977   if (bfd_default_vector[0] != NULL
 978       && strcmp (name, bfd_default_vector[0]->name) == 0)
 979     return true;
 980
 981   target = find_target (name);
 982   if (target == NULL)
 983     return false;
 984
 985   bfd_default_vector[0] = target;
 986   return true;
 987 }
 988
 989 /*
 990 FUNCTION
 991         bfd_find_target
 992
 993 SYNOPSIS
 994         const bfd_target *bfd_find_target(CONST char *target_name, bfd *abfd);
 995
 996 DESCRIPTION
 997         Return a pointer to the transfer vector for the object target
 998         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
 999         one in the environment variable <<GNUTARGET>>; if that is null or not
1000         defined, then choose the first entry in the target list.
1001         Passing in the string "default" or setting the environment
1002         variable to "default" will cause the first entry in the target
1003         list to be returned, and "target_defaulted" will be set in the
1004         BFD.  This causes <<bfd_check_format>> to loop over all the
1005         targets to find the one that matches the file being read.
1006 */
1007
1008 const bfd_target *
1009 bfd_find_target (target_name, abfd)
1010      const char *target_name;
1011      bfd *abfd;
1012 {
1013   const char *targname;
1014   const bfd_target *target;
1015
1016   if (target_name != NULL)
1017     targname = target_name;
1018   else
1019     targname = getenv ("GNUTARGET");
1020
1021   /* This is safe; the vector cannot be null */
1022   if (targname == NULL || strcmp (targname, "default") == 0)
1023     {
1024       abfd->target_defaulted = true;
1025       if (bfd_default_vector[0] != NULL)
1026         abfd->xvec = bfd_default_vector[0];
1027       else
1028         abfd->xvec = bfd_target_vector[0];
1029       return abfd->xvec;
1030     }
1031
1032   abfd->target_defaulted = false;
1033
1034   target = find_target (targname);
1035   if (target == NULL)
1036     return NULL;
1037
1038   abfd->xvec = target;
1039   return target;
1040 }
1041
1042 /*
1043 FUNCTION
1044         bfd_target_list
1045
1046 SYNOPSIS
1047         const char **bfd_target_list(void);
1048
1049 DESCRIPTION
1050         Return a freshly malloced NULL-terminated
1051         vector of the names of all the valid BFD targets. Do not
1052         modify the names.
1053
1054 */
1055
1056 const char **
1057 bfd_target_list ()
1058 {
1059   int vec_length= 0;
1060 #if defined (HOST_HPPAHPUX) && ! defined (__STDC__)
1061   /* The native compiler on the HP9000/700 has a bug which causes it
1062      to loop endlessly when compiling this file.  This avoids it.  */
1063   volatile
1064 #endif
1065     const bfd_target * const *target;
1066   CONST  char **name_list, **name_ptr;
1067
1068   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1069     vec_length++;
1070
1071   name_ptr = name_list = (CONST char **)
1072     bfd_zmalloc ((vec_length + 1) * sizeof (char **));
1073
1074   if (name_list == NULL)
1075     return NULL;
1076
1077   for (target = &bfd_target_vector[0]; *target != NULL; target++)
1078     *(name_ptr++) = (*target)->name;
1079
1080   return name_list;
1081 }