bfd/targets.c

   1 /* Generic target-file-type support for the BFD library.
   2    Copyright 1990, 91, 92, 93, 1994 Free Software Foundation, Inc.
   3    Written by Cygnus Support.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24
  25 /*
  26 SECTION
  27         Targets
  28
  29 DESCRIPTION
  30         Each port of BFD to a different machine requries the creation
  31         of a target back end. All the back end provides to the root
  32         part of BFD is a structure containing pointers to functions
  33         which perform certain low level operations on files. BFD
  34         translates the applications's requests through a pointer into
  35         calls to the back end routines.
  36
  37         When a file is opened with <<bfd_openr>>, its format and
  38         target are unknown. BFD uses various mechanisms to determine
  39         how to interpret the file. The operations performed are:
  40
  41         o Create a BFD by calling the internal routine
  42         <<_bfd_new_bfd>>, then call <<bfd_find_target>> with the
  43         target string supplied to <<bfd_openr>> and the new BFD pointer.
  44
  45         o If a null target string was provided to <<bfd_find_target>>,
  46         look up the environment variable <<GNUTARGET>> and use
  47         that as the target string.
  48
  49         o If the target string is still <<NULL>>, or the target string is
  50         <<default>>, then use the first item in the target vector
  51         as the target type, and set <<target_defaulted>> in the BFD to
  52         cause <<bfd_check_format>> to loop through all the targets.
  53         @xref{bfd_target}.  @xref{Formats}.
  54
  55         o Otherwise, inspect the elements in the target vector
  56         one by one, until a match on target name is found. When found,
  57         use it.
  58
  59         o Otherwise return the error <<bfd_error_invalid_target>> to
  60         <<bfd_openr>>.
  61
  62         o <<bfd_openr>> attempts to open the file using
  63         <<bfd_open_file>>, and returns the BFD.
  64
  65         Once the BFD has been opened and the target selected, the file
  66         format may be determined. This is done by calling
  67         <<bfd_check_format>> on the BFD with a suggested format.
  68         If <<target_defaulted>> has been set, each possible target
  69         type is tried to see if it recognizes the specified format.
  70         <<bfd_check_format>> returns <<true>> when the caller guesses right.
  71 @menu
  72 @* bfd_target::
  73 @end menu
  74 */
  75
  76
  77 /*
  78
  79 INODE
  80         bfd_target,  , Targets, Targets
  81 DOCDD
  82 SUBSECTION
  83         bfd_target
  84
  85 DESCRIPTION
  86         This structure contains everything that BFD knows about a
  87         target. It includes things like its byte order, name, and which
  88         routines to call to do various operations.
  89
  90         Every BFD points to a target structure with its <<xvec>>
  91         member.
  92
  93         The macros below are used to dispatch to functions through the
  94         <<bfd_target>> vector. They are used in a number of macros further
  95         down in @file{bfd.h}, and are also used when calling various
  96         routines by hand inside the BFD implementation.  The @var{arglist}
  97         argument must be parenthesized; it contains all the arguments
  98         to the called function.
  99
 100         They make the documentation (more) unpleasant to read, so if
 101         someone wants to fix this and not break the above, please do.
 102
 103 .#define BFD_SEND(bfd, message, arglist) \
 104 .               ((*((bfd)->xvec->message)) arglist)
 105 .
 106 .#ifdef DEBUG_BFD_SEND
 107 .#undef BFD_SEND
 108 .#define BFD_SEND(bfd, message, arglist) \
 109 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 110 .    ((*((bfd)->xvec->message)) arglist) : \
 111 .    (bfd_assert (__FILE__,__LINE__), NULL))
 112 .#endif
 113
 114         For operations which index on the BFD format:
 115
 116 .#define BFD_SEND_FMT(bfd, message, arglist) \
 117 .            (((bfd)->xvec->message[(int)((bfd)->format)]) arglist)
 118 .
 119 .#ifdef DEBUG_BFD_SEND
 120 .#undef BFD_SEND_FMT
 121 .#define BFD_SEND_FMT(bfd, message, arglist) \
 122 .  (((bfd) && (bfd)->xvec && (bfd)->xvec->message) ? \
 123 .   (((bfd)->xvec->message[(int)((bfd)->format)]) arglist) : \
 124 .   (bfd_assert (__FILE__,__LINE__), NULL))
 125 .#endif
 126
 127         This is the structure which defines the type of BFD this is.  The
 128         <<xvec>> member of the struct <<bfd>> itself points here.  Each
 129         module that implements access to a different target under BFD,
 130         defines one of these.
 131
 132
 133         FIXME, these names should be rationalised with the names of
 134         the entry points which call them. Too bad we can't have one
 135         macro to define them both!
 136
 137 .enum bfd_flavour {
 138 .  bfd_target_unknown_flavour,
 139 .  bfd_target_aout_flavour,
 140 .  bfd_target_coff_flavour,
 141 .  bfd_target_ecoff_flavour,
 142 .  bfd_target_elf_flavour,
 143 .  bfd_target_ieee_flavour,
 144 .  bfd_target_nlm_flavour,
 145 .  bfd_target_oasys_flavour,
 146 .  bfd_target_tekhex_flavour,
 147 .  bfd_target_srec_flavour,
 148 .  bfd_target_som_flavour};
 149 .
 150 .{* Forward declaration.  *}
 151 .typedef struct bfd_link_info _bfd_link_info;
 152 .
 153 .typedef struct bfd_target
 154 .{
 155
 156 Identifies the kind of target, e.g., SunOS4, Ultrix, etc.
 157
 158 .  char *name;
 159
 160 The "flavour" of a back end is a general indication about the contents
 161 of a file.
 162
 163 .  enum bfd_flavour flavour;
 164
 165 The order of bytes within the data area of a file.
 166
 167 .  boolean byteorder_big_p;
 168
 169 The order of bytes within the header parts of a file.
 170
 171 .  boolean header_byteorder_big_p;
 172
 173 A mask of all the flags which an executable may have set -
 174 from the set <<NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.
 175
 176 .  flagword object_flags;
 177
 178 A mask of all the flags which a section may have set - from
 179 the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.
 180
 181 .  flagword section_flags;
 182
 183 The character normally found at the front of a symbol
 184 (if any), perhaps `_'.
 185
 186 .  char symbol_leading_char;
 187
 188 The pad character for file names within an archive header.
 189
 190 .  char ar_pad_char;
 191
 192 The maximum number of characters in an archive header.
 193
 194 .  unsigned short ar_max_namelen;
 195
 196 The minimum alignment restriction for any section.
 197
 198 .  unsigned int align_power_min;
 199
 200 Entries for byte swapping for data. These are different from the other
 201 entry points, since they don't take a BFD asthe first argument.
 202 Certain other handlers could do the same.
 203
 204 .  bfd_vma      (*bfd_getx64) PARAMS ((const bfd_byte *));
 205 .  bfd_signed_vma (*bfd_getx_signed_64) PARAMS ((const bfd_byte *));
 206 .  void         (*bfd_putx64) PARAMS ((bfd_vma, bfd_byte *));
 207 .  bfd_vma      (*bfd_getx32) PARAMS ((const bfd_byte *));
 208 .  bfd_signed_vma (*bfd_getx_signed_32) PARAMS ((const bfd_byte *));
 209 .  void         (*bfd_putx32) PARAMS ((bfd_vma, bfd_byte *));
 210 .  bfd_vma      (*bfd_getx16) PARAMS ((const bfd_byte *));
 211 .  bfd_signed_vma (*bfd_getx_signed_16) PARAMS ((const bfd_byte *));
 212 .  void         (*bfd_putx16) PARAMS ((bfd_vma, bfd_byte *));
 213
 214 Byte swapping for the headers
 215
 216 .  bfd_vma      (*bfd_h_getx64) PARAMS ((const bfd_byte *));
 217 .  bfd_signed_vma (*bfd_h_getx_signed_64) PARAMS ((const bfd_byte *));
 218 .  void         (*bfd_h_putx64) PARAMS ((bfd_vma, bfd_byte *));
 219 .  bfd_vma      (*bfd_h_getx32) PARAMS ((const bfd_byte *));
 220 .  bfd_signed_vma (*bfd_h_getx_signed_32) PARAMS ((const bfd_byte *));
 221 .  void         (*bfd_h_putx32) PARAMS ((bfd_vma, bfd_byte *));
 222 .  bfd_vma      (*bfd_h_getx16) PARAMS ((const bfd_byte *));
 223 .  bfd_signed_vma (*bfd_h_getx_signed_16) PARAMS ((const bfd_byte *));
 224 .  void         (*bfd_h_putx16) PARAMS ((bfd_vma, bfd_byte *));
 225
 226 Format dependent routines: these are vectors of entry points
 227 within the target vector structure, one for each format to check.
 228
 229 Check the format of a file being read.  Return a <<bfd_target *>> or zero.
 230
 231 .  struct bfd_target * (*_bfd_check_format[bfd_type_end]) PARAMS ((bfd *));
 232
 233 Set the format of a file being written.
 234
 235 .  boolean             (*_bfd_set_format[bfd_type_end]) PARAMS ((bfd *));
 236
 237 Write cached information into a file being written, at <<bfd_close>>.
 238
 239 .  boolean             (*_bfd_write_contents[bfd_type_end]) PARAMS ((bfd *));
 240
 241 The following functions are defined in <<JUMP_TABLE>>. The idea is
 242 that the back end writer of <<foo>> names all the routines
 243 <<foo_>>@var{entry_point}; <<JUMP_TABLE>> will build the entries
 244 in this structure in the right order.
 245
 246 Core file entry points.
 247
 248 .  char *   (*_core_file_failing_command) PARAMS ((bfd *));
 249 .  int      (*_core_file_failing_signal) PARAMS ((bfd *));
 250 .  boolean  (*_core_file_matches_executable_p) PARAMS ((bfd *, bfd *));
 251
 252 Archive entry points.
 253
 254 .  boolean  (*_bfd_slurp_armap) PARAMS ((bfd *));
 255 .  boolean  (*_bfd_slurp_extended_name_table) PARAMS ((bfd *));
 256 .  void     (*_bfd_truncate_arname) PARAMS ((bfd *, CONST char *, char *));
 257 .  boolean  (*write_armap) PARAMS ((bfd *arch,
 258 .                              unsigned int elength,
 259 .                              struct orl *map,
 260 .                              unsigned int orl_count,
 261 .                              int stridx));
 262
 263 Standard stuff.
 264
 265 .  boolean       (*_close_and_cleanup) PARAMS ((bfd *));
 266 .  boolean       (*_bfd_set_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 267 .                                            file_ptr, bfd_size_type));
 268 .  boolean       (*_bfd_get_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 269 .                                            file_ptr, bfd_size_type));
 270 .  boolean       (*_new_section_hook) PARAMS ((bfd *, sec_ptr));
 271
 272 Symbols and relocations.
 273
 274 .  unsigned int  (*_get_symtab_upper_bound) PARAMS ((bfd *));
 275 .  unsigned int  (*_bfd_canonicalize_symtab) PARAMS ((bfd *,
 276 .                                              struct symbol_cache_entry **));
 277 .  unsigned int  (*_get_reloc_upper_bound) PARAMS ((bfd *, sec_ptr));
 278 .  unsigned int  (*_bfd_canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **,
 279 .                                              struct symbol_cache_entry **));
 280 .  struct symbol_cache_entry  *
 281 .                (*_bfd_make_empty_symbol) PARAMS ((bfd *));
 282 .  void          (*_bfd_print_symbol) PARAMS ((bfd *, PTR,
 283 .                                      struct symbol_cache_entry *,
 284 .                                      bfd_print_symbol_type));
 285 .#define bfd_print_symbol(b,p,s,e) BFD_SEND(b, _bfd_print_symbol, (b,p,s,e))
 286 .  void          (*_bfd_get_symbol_info) PARAMS ((bfd *,
 287 .                                      struct symbol_cache_entry *,
 288 .                                      symbol_info *));
 289 .#define bfd_get_symbol_info(b,p,e) BFD_SEND(b, _bfd_get_symbol_info, (b,p,e))
 290
 291 .  alent *    (*_get_lineno) PARAMS ((bfd *, struct symbol_cache_entry *));
 292 .
 293 .  boolean    (*_bfd_set_arch_mach) PARAMS ((bfd *, enum bfd_architecture,
 294 .                    unsigned long));
 295 .
 296 .  bfd *      (*openr_next_archived_file) PARAMS ((bfd *arch, bfd *prev));
 297 .
 298 .  boolean    (*_bfd_find_nearest_line) PARAMS ((bfd *abfd,
 299 .                    struct sec *section, struct symbol_cache_entry **symbols,
 300 .                    bfd_vma offset, CONST char **file, CONST char **func,
 301 .                    unsigned int *line));
 302 .
 303 .  int        (*_bfd_stat_arch_elt) PARAMS ((bfd *, struct stat *));
 304 .
 305 .  int        (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean));
 306 .
 307 .  void       (*_bfd_debug_info_start) PARAMS ((bfd *));
 308 .  void       (*_bfd_debug_info_end) PARAMS ((bfd *));
 309 .  void       (*_bfd_debug_info_accumulate) PARAMS ((bfd *, struct sec *));
 310 .
 311 .  bfd_byte * (*_bfd_get_relocated_section_contents) PARAMS ((bfd *,
 312 .                    struct bfd_link_info *, struct bfd_link_order *,
 313 .                    bfd_byte *data, boolean relocateable,
 314 .                    struct symbol_cache_entry **));
 315 .
 316 .  boolean    (*_bfd_relax_section) PARAMS ((bfd *, struct sec *,
 317 .                    struct bfd_link_info *, struct symbol_cache_entry **));
 318 .
 319 . {* See documentation on reloc types.  *}
 320 . CONST struct reloc_howto_struct *
 321 .       (*reloc_type_lookup) PARAMS ((bfd *abfd,
 322 .                                     bfd_reloc_code_real_type code));
 323 .
 324 . {* Back-door to allow format-aware applications to create debug symbols
 325 .    while using BFD for everything else.  Currently used by the assembler
 326 .    when creating COFF files.  *}
 327 . asymbol *  (*_bfd_make_debug_symbol) PARAMS ((
 328 .       bfd *abfd,
 329 .       void *ptr,
 330 .       unsigned long size));
 331 .
 332 . {* Create a hash table for the linker.  Different backends store
 333 .    different information in this table.  *}
 334 . struct bfd_link_hash_table *(*_bfd_link_hash_table_create) PARAMS ((bfd *));
 335 .
 336 . {* Add symbols from this object file into the hash table.  *}
 337 . boolean (*_bfd_link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
 338 .
 339 . {* Do a link based on the link_order structures attached to each
 340 .    section of the BFD.  *}
 341 . boolean (*_bfd_final_link) PARAMS ((bfd *, struct bfd_link_info *));
 342 .
 343
 344 Data for use by back-end routines, which isn't generic enough to belong
 345 in this structure.
 346
 347 . PTR backend_data;
 348 .} bfd_target;
 349
 350 */
 351
 352 /* All known xvecs (even those that don't compile on all systems).
 353    Alphabetized for easy reference.
 354    They are listed a second time below, since
 355    we can't intermix extern's and initializers.  */
 356 extern bfd_target a29kcoff_big_vec;
 357 extern bfd_target a_out_adobe_vec;
 358 extern bfd_target aout_mips_big_vec;
 359 extern bfd_target aout_mips_little_vec;
 360 extern bfd_target apollocoff_vec;
 361 extern bfd_target b_out_vec_big_host;
 362 extern bfd_target b_out_vec_little_host;
 363 extern bfd_target bfd_elf32_big_generic_vec;
 364 extern bfd_target bfd_elf32_bigmips_vec;
 365 extern bfd_target bfd_elf32_hppa_vec;
 366 extern bfd_target bfd_elf32_i386_vec;
 367 extern bfd_target bfd_elf32_i860_vec;
 368 extern bfd_target bfd_elf32_little_generic_vec;
 369 extern bfd_target bfd_elf32_littlemips_vec;
 370 extern bfd_target bfd_elf32_m68k_vec;
 371 extern bfd_target bfd_elf32_m88k_vec;
 372 extern bfd_target bfd_elf32_powerpc_vec;
 373 extern bfd_target bfd_elf32_sparc_vec;
 374 extern bfd_target bfd_elf64_big_generic_vec;
 375 extern bfd_target bfd_elf64_little_generic_vec;
 376 /* start-sanitize-v9 */
 377 extern bfd_target bfd_elf64_sparc_vec;
 378 /* end-sanitize-v9 */
 379 extern bfd_target demo_64_vec;
 380 extern bfd_target ecoff_big_vec;
 381 extern bfd_target ecoff_little_vec;
 382 extern bfd_target ecoffalpha_little_vec;
 383 extern bfd_target h8300coff_vec;
 384 extern bfd_target h8500coff_vec;
 385 extern bfd_target host_aout_vec;
 386 extern bfd_target hp300bsd_vec;
 387 extern bfd_target hp300hpux_vec;
 388 extern bfd_target som_vec;
 389 extern bfd_target i386aout_vec;
 390 extern bfd_target i386bsd_vec;
 391 extern bfd_target netbsd386_vec;
 392 extern bfd_target i386coff_vec;
 393 extern bfd_target i386linux_vec;
 394 extern bfd_target i386lynx_aout_vec;
 395 extern bfd_target i386lynx_coff_vec;
 396 extern bfd_target i386mach3_vec;
 397 extern bfd_target icoff_big_vec;
 398 extern bfd_target icoff_little_vec;
 399 extern bfd_target ieee_vec;
 400 extern bfd_target m68kcoff_vec;
 401 extern bfd_target m68kcoffun_vec;
 402 extern bfd_target m68klynx_aout_vec;
 403 extern bfd_target m68klynx_coff_vec;
 404 extern bfd_target m88kbcs_vec;
 405 extern bfd_target newsos3_vec;
 406 extern bfd_target nlm32_i386_vec;
 407 extern bfd_target nlm32_sparc_vec;
 408 extern bfd_target nlm32_alpha_vec;
 409 /*start-sanitize-powerpc-netware*/
 410 extern bfd_target nlm32_powerpc_vec;
 411 /*end-sanitize-powerpc-netware*/
 412 extern bfd_target oasys_vec;
 413 extern bfd_target rs6000coff_vec;
 414 extern bfd_target shcoff_vec;
 415 extern bfd_target sparclynx_aout_vec;
 416 extern bfd_target sparclynx_coff_vec;
 417 extern bfd_target sparccoff_vec;
 418 extern bfd_target sunos_big_vec;
 419 extern bfd_target tekhex_vec;
 420 extern bfd_target we32kcoff_vec;
 421 extern bfd_target z8kcoff_vec;
 422
 423 /* srec is always included.  */
 424 extern bfd_target srec_vec;
 425 extern bfd_target symbolsrec_vec;
 426
 427 /* All of the xvecs for core files.  */
 428 extern bfd_target aix386_core_vec;
 429 extern bfd_target hpux_core_vec;
 430 extern bfd_target hppabsd_core_vec;
 431 extern bfd_target irix_core_vec;
 432 extern bfd_target osf_core_vec;
 433 extern bfd_target sco_core_vec;
 434 extern bfd_target trad_core_vec;
 435 extern bfd_target ptrace_core_vec;
 436
 437 bfd_target *bfd_target_vector[] = {
 438
 439 #ifdef SELECT_VECS
 440
 441         SELECT_VECS,
 442
 443 #else /* not SELECT_VECS */
 444
 445 #ifdef DEFAULT_VECTOR
 446         &DEFAULT_VECTOR,
 447 #endif
 448         /* This list is alphabetized to make it easy to compare
 449            with other vector lists -- the decls above and
 450            the case statement in configure.in.
 451            Vectors that don't compile on all systems, or aren't finished,
 452            should have an entry here with #if 0 around it, to show that
 453            it wasn't omitted by mistake.  */
 454         &a29kcoff_big_vec,
 455         &a_out_adobe_vec,
 456 #if 0                           /* No one seems to use this.  */
 457         &aout_mips_big_vec,
 458 #endif
 459         &aout_mips_little_vec,
 460         &b_out_vec_big_host,
 461         &b_out_vec_little_host,
 462
 463         /* This, and other vectors, may not be used in any *.mt configuration.
 464            But that does not mean they are unnecessary.  If configured
 465            --with-targets=all, objdump or gdb should be able to examine
 466            the file even if we don't recognize the machine type.  */
 467         &bfd_elf32_big_generic_vec,
 468         &bfd_elf32_bigmips_vec,
 469         &bfd_elf32_hppa_vec,
 470         &bfd_elf32_i386_vec,
 471         &bfd_elf32_i860_vec,
 472         &bfd_elf32_little_generic_vec,
 473         &bfd_elf32_littlemips_vec,
 474         &bfd_elf32_m68k_vec,
 475         &bfd_elf32_m88k_vec,
 476         &bfd_elf32_sparc_vec,
 477 #ifdef BFD64                    /* No one seems to use this.  */
 478         &bfd_elf64_big_generic_vec,
 479         &bfd_elf64_little_generic_vec,
 480 #endif
 481 /* start-sanitize-v9 */
 482 #if 0
 483         &bfd_elf64_sparc_vec,
 484 #endif
 485 /* end-sanitize-v9 */
 486 #ifdef BFD64
 487         &demo_64_vec,   /* Only compiled if host has long-long support */
 488 #endif
 489         &ecoff_big_vec,
 490         &ecoff_little_vec,
 491 #if 0
 492         &ecoffalpha_little_vec,
 493 #endif
 494         &h8300coff_vec,
 495         &h8500coff_vec,
 496 #if 0
 497         /* Since a.out files lack decent magic numbers, no way to recognize
 498            which kind of a.out file it is.  */
 499         &host_aout_vec,
 500 #endif
 501 #if 0                           /* Clashes with sunos_big_vec magic no.  */
 502         &hp300bsd_vec,
 503 #endif
 504         &hp300hpux_vec,
 505 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
 506         &som_vec,
 507 #endif
 508         &i386aout_vec,
 509         &i386bsd_vec,
 510         &netbsd386_vec,
 511         &i386coff_vec,
 512 #if 0
 513         /* Since a.out files lack decent magic numbers, no way to recognize
 514            which kind of a.out file it is.  */
 515         &i386linux_vec,
 516 #endif
 517         &i386lynx_aout_vec,
 518         &i386lynx_coff_vec,
 519         &icoff_big_vec,
 520         &icoff_little_vec,
 521         &ieee_vec,
 522         &m68kcoff_vec,
 523         &m68kcoffun_vec,
 524         &m68klynx_aout_vec,
 525         &m68klynx_coff_vec,
 526         &m88kbcs_vec,
 527         &newsos3_vec,
 528         &nlm32_i386_vec,
 529         &nlm32_sparc_vec,
 530 #ifdef BFD64
 531         &nlm32_alpha_vec,
 532 #endif
 533 #if 0
 534         /* We have no oasys tools anymore, so we can't test any of this
 535            anymore. If you want to test the stuff yourself, go ahead...
 536            steve@cygnus.com
 537            Worse, since there is no magic number for archives, there
 538            can be annoying target mis-matches.  */
 539         &oasys_vec,
 540 #endif
 541         &rs6000coff_vec,
 542         &shcoff_vec,
 543         &sparclynx_aout_vec,
 544         &sparclynx_coff_vec,
 545         &sunos_big_vec,
 546 #if 0
 547         &tekhex_vec,
 548 #endif
 549         &we32kcoff_vec,
 550         &z8kcoff_vec,
 551
 552 #endif /* not SELECT_VECS */
 553
 554 /* Always support S-records, for convenience.  */
 555         &srec_vec,
 556         &symbolsrec_vec,
 557
 558 /* Add any required traditional-core-file-handler.  */
 559
 560 #ifdef AIX386_CORE
 561         &aix386_core_vec,
 562 #endif
 563 #ifdef HPUX_CORE
 564         &hpux_core_vec,
 565 #endif
 566 #ifdef HPPABSD_CORE
 567         &hppabsd_core_vec,
 568 #endif
 569 #ifdef IRIX_CORE
 570         &irix_core_vec,
 571 #endif
 572 #ifdef OSF_CORE
 573         &osf_core_vec,
 574 #endif
 575 #ifdef  TRAD_CORE
 576         &trad_core_vec,
 577 #endif
 578
 579 #ifdef  PTRACE_CORE
 580         &ptrace_core_vec,
 581 #endif
 582
 583         NULL /* end of list marker */
 584 };
 585
 586 /* bfd_default_vector[0] contains either the address of the default vector,
 587    if there is one, or zero if there isn't.  */
 588
 589 bfd_target *bfd_default_vector[] = {
 590 #ifdef DEFAULT_VECTOR
 591         &DEFAULT_VECTOR,
 592 #endif
 593         NULL
 594 };
 595
 596 /* When there is an ambiguous match, bfd_check_format_matches puts the
 597    names of the matching targets in an array.  This variable is the maximum
 598    number of entries that the array could possibly need.  */
 599 CONST size_t _bfd_target_vector_entries = sizeof(bfd_target_vector)/sizeof(*bfd_target_vector);
 600
 601 /*
 602 FUNCTION
 603         bfd_find_target
 604
 605 SYNOPSIS
 606         bfd_target *bfd_find_target(CONST char *target_name, bfd *abfd);
 607
 608 DESCRIPTION
 609         Return a pointer to the transfer vector for the object target
 610         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
 611         one in the environment variable <<GNUTARGET>>; if that is null or not
 612         defined, then choose the first entry in the target list.
 613         Passing in the string "default" or setting the environment
 614         variable to "default" will cause the first entry in the target
 615         list to be returned, and "target_defaulted" will be set in the
 616         BFD.  This causes <<bfd_check_format>> to loop over all the
 617         targets to find the one that matches the file being read.
 618 */
 619
 620 bfd_target *
 621 DEFUN(bfd_find_target,(target_name, abfd),
 622       CONST char *target_name AND
 623       bfd *abfd)
 624 {
 625   bfd_target **target;
 626   extern char *getenv ();
 627   CONST char *targname = (target_name ? target_name :
 628                           (CONST char *) getenv ("GNUTARGET"));
 629
 630   /* This is safe; the vector cannot be null */
 631   if (targname == NULL || !strcmp (targname, "default")) {
 632     abfd->target_defaulted = true;
 633     return abfd->xvec = bfd_target_vector[0];
 634   }
 635
 636   abfd->target_defaulted = false;
 637
 638   for (target = &bfd_target_vector[0]; *target != NULL; target++) {
 639     if (!strcmp (targname, (*target)->name))
 640       return abfd->xvec = *target;
 641   }
 642
 643   bfd_set_error (bfd_error_invalid_target);
 644   return NULL;
 645 }
 646
 647
 648 /*
 649 FUNCTION
 650         bfd_target_list
 651
 652 SYNOPSIS
 653         CONST char **bfd_target_list(void);
 654
 655 DESCRIPTION
 656         Return a freshly malloced NULL-terminated
 657         vector of the names of all the valid BFD targets. Do not
 658         modify the names.
 659
 660 */
 661
 662 CONST char **
 663 DEFUN_VOID(bfd_target_list)
 664 {
 665   int vec_length= 0;
 666 #ifdef NATIVE_HPPAHPUX_COMPILER
 667   /* The native compiler on the HP9000/700 has a bug which causes it
 668      to loop endlessly when compiling this file.  This avoids it.  */
 669   volatile
 670 #endif
 671     bfd_target **target;
 672   CONST  char **name_list, **name_ptr;
 673
 674   for (target = &bfd_target_vector[0]; *target != NULL; target++)
 675     vec_length++;
 676
 677   name_ptr = name_list = (CONST char **)
 678     bfd_zmalloc ((vec_length + 1) * sizeof (char **));
 679
 680   if (name_list == NULL) {
 681     bfd_set_error (bfd_error_no_memory);
 682     return NULL;
 683   }
 684
 685   for (target = &bfd_target_vector[0]; *target != NULL; target++)
 686     *(name_ptr++) = (*target)->name;
 687
 688   return name_list;
 689 }