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 .  bfd_target_os9k_flavour};
 150 .
 151 .{* Forward declaration.  *}
 152 .typedef struct bfd_link_info _bfd_link_info;
 153 .
 154 .typedef struct bfd_target
 155 .{
 156
 157 Identifies the kind of target, e.g., SunOS4, Ultrix, etc.
 158
 159 .  char *name;
 160
 161 The "flavour" of a back end is a general indication about the contents
 162 of a file.
 163
 164 .  enum bfd_flavour flavour;
 165
 166 The order of bytes within the data area of a file.
 167
 168 .  boolean byteorder_big_p;
 169
 170 The order of bytes within the header parts of a file.
 171
 172 .  boolean header_byteorder_big_p;
 173
 174 A mask of all the flags which an executable may have set -
 175 from the set <<NO_FLAGS>>, <<HAS_RELOC>>, ...<<D_PAGED>>.
 176
 177 .  flagword object_flags;
 178
 179 A mask of all the flags which a section may have set - from
 180 the set <<SEC_NO_FLAGS>>, <<SEC_ALLOC>>, ...<<SET_NEVER_LOAD>>.
 181
 182 .  flagword section_flags;
 183
 184 The character normally found at the front of a symbol
 185 (if any), perhaps `_'.
 186
 187 .  char symbol_leading_char;
 188
 189 The pad character for file names within an archive header.
 190
 191 .  char ar_pad_char;
 192
 193 The maximum number of characters in an archive header.
 194
 195 .  unsigned short ar_max_namelen;
 196
 197 The minimum alignment restriction for any section.
 198
 199 .  unsigned int align_power_min;
 200
 201 Entries for byte swapping for data. These are different from the other
 202 entry points, since they don't take a BFD asthe first argument.
 203 Certain other handlers could do the same.
 204
 205 .  bfd_vma      (*bfd_getx64) PARAMS ((const bfd_byte *));
 206 .  bfd_signed_vma (*bfd_getx_signed_64) PARAMS ((const bfd_byte *));
 207 .  void         (*bfd_putx64) PARAMS ((bfd_vma, bfd_byte *));
 208 .  bfd_vma      (*bfd_getx32) PARAMS ((const bfd_byte *));
 209 .  bfd_signed_vma (*bfd_getx_signed_32) PARAMS ((const bfd_byte *));
 210 .  void         (*bfd_putx32) PARAMS ((bfd_vma, bfd_byte *));
 211 .  bfd_vma      (*bfd_getx16) PARAMS ((const bfd_byte *));
 212 .  bfd_signed_vma (*bfd_getx_signed_16) PARAMS ((const bfd_byte *));
 213 .  void         (*bfd_putx16) PARAMS ((bfd_vma, bfd_byte *));
 214
 215 Byte swapping for the headers
 216
 217 .  bfd_vma      (*bfd_h_getx64) PARAMS ((const bfd_byte *));
 218 .  bfd_signed_vma (*bfd_h_getx_signed_64) PARAMS ((const bfd_byte *));
 219 .  void         (*bfd_h_putx64) PARAMS ((bfd_vma, bfd_byte *));
 220 .  bfd_vma      (*bfd_h_getx32) PARAMS ((const bfd_byte *));
 221 .  bfd_signed_vma (*bfd_h_getx_signed_32) PARAMS ((const bfd_byte *));
 222 .  void         (*bfd_h_putx32) PARAMS ((bfd_vma, bfd_byte *));
 223 .  bfd_vma      (*bfd_h_getx16) PARAMS ((const bfd_byte *));
 224 .  bfd_signed_vma (*bfd_h_getx_signed_16) PARAMS ((const bfd_byte *));
 225 .  void         (*bfd_h_putx16) PARAMS ((bfd_vma, bfd_byte *));
 226
 227 Format dependent routines: these are vectors of entry points
 228 within the target vector structure, one for each format to check.
 229
 230 Check the format of a file being read.  Return a <<bfd_target *>> or zero.
 231
 232 .  struct bfd_target * (*_bfd_check_format[bfd_type_end]) PARAMS ((bfd *));
 233
 234 Set the format of a file being written.
 235
 236 .  boolean             (*_bfd_set_format[bfd_type_end]) PARAMS ((bfd *));
 237
 238 Write cached information into a file being written, at <<bfd_close>>.
 239
 240 .  boolean             (*_bfd_write_contents[bfd_type_end]) PARAMS ((bfd *));
 241
 242 The general target vector.
 243
 244 .
 245 .  {* Generic entry points.  *}
 246 .#define BFD_JUMP_TABLE_GENERIC(NAME)\
 247 .CAT(NAME,_close_and_cleanup),\
 248 .CAT(NAME,_bfd_free_cached_info),\
 249 .CAT(NAME,_new_section_hook),\
 250 .CAT(NAME,_get_section_contents)
 251 .  {* Called when the BFD is being closed to do any necessary cleanup.  *}
 252 .  boolean       (*_close_and_cleanup) PARAMS ((bfd *));
 253 .  {* Ask the BFD to free all cached information.  *}
 254 .  boolean (*_bfd_free_cached_info) PARAMS ((bfd *));
 255 .  {* Called when a new section is created.  *}
 256 .  boolean       (*_new_section_hook) PARAMS ((bfd *, sec_ptr));
 257 .  {* Read the contents of a section.  *}
 258 .  boolean       (*_bfd_get_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 259 .                                            file_ptr, bfd_size_type));
 260 .
 261 .  {* Entry points to copy private data.  *}
 262 .#define BFD_JUMP_TABLE_COPY(NAME)\
 263 .CAT(NAME,_bfd_copy_private_bfd_data),\
 264 .CAT(NAME,_bfd_copy_private_section_data)
 265 .  {* Called to copy BFD general private data from one object file
 266 .     to another.  *}
 267 .  boolean       (*_bfd_copy_private_bfd_data) PARAMS ((bfd *, bfd *));
 268 .  {* Called to copy BFD private section data from one object file
 269 .     to another.  *}
 270 .  boolean       (*_bfd_copy_private_section_data) PARAMS ((bfd *, sec_ptr,
 271 .                                                       bfd *, sec_ptr));
 272 .
 273 .  {* Core file entry points.  *}
 274 .#define BFD_JUMP_TABLE_CORE(NAME)\
 275 .CAT(NAME,_core_file_failing_command),\
 276 .CAT(NAME,_core_file_failing_signal),\
 277 .CAT(NAME,_core_file_matches_executable_p)
 278 .  char *   (*_core_file_failing_command) PARAMS ((bfd *));
 279 .  int      (*_core_file_failing_signal) PARAMS ((bfd *));
 280 .  boolean  (*_core_file_matches_executable_p) PARAMS ((bfd *, bfd *));
 281 .
 282 .  {* Archive entry points.  *}
 283 .#define BFD_JUMP_TABLE_ARCHIVE(NAME)\
 284 .CAT(NAME,_slurp_armap),\
 285 .CAT(NAME,_slurp_extended_name_table),\
 286 .CAT(NAME,_truncate_arname),\
 287 .CAT(NAME,_write_armap),\
 288 .CAT(NAME,_openr_next_archived_file),\
 289 .CAT(NAME,_generic_stat_arch_elt)
 290 .  boolean  (*_bfd_slurp_armap) PARAMS ((bfd *));
 291 .  boolean  (*_bfd_slurp_extended_name_table) PARAMS ((bfd *));
 292 .  void     (*_bfd_truncate_arname) PARAMS ((bfd *, CONST char *, char *));
 293 .  boolean  (*write_armap) PARAMS ((bfd *arch,
 294 .                              unsigned int elength,
 295 .                              struct orl *map,
 296 .                              unsigned int orl_count,
 297 .                              int stridx));
 298 .  bfd *      (*openr_next_archived_file) PARAMS ((bfd *arch, bfd *prev));
 299 .  int        (*_bfd_stat_arch_elt) PARAMS ((bfd *, struct stat *));
 300 .
 301 .  {* Entry points used for symbols.  *}
 302 .#define BFD_JUMP_TABLE_SYMBOLS(NAME)\
 303 .CAT(NAME,_get_symtab_upper_bound),\
 304 .CAT(NAME,_get_symtab),\
 305 .CAT(NAME,_make_empty_symbol),\
 306 .CAT(NAME,_print_symbol),\
 307 .CAT(NAME,_get_symbol_info),\
 308 .CAT(NAME,_bfd_is_local_label),\
 309 .CAT(NAME,_get_lineno),\
 310 .CAT(NAME,_find_nearest_line),\
 311 .CAT(NAME,_bfd_make_debug_symbol)
 312 .  long  (*_bfd_get_symtab_upper_bound) PARAMS ((bfd *));
 313 .  long  (*_bfd_canonicalize_symtab) PARAMS ((bfd *,
 314 .                                             struct symbol_cache_entry **));
 315 .  struct symbol_cache_entry  *
 316 .                (*_bfd_make_empty_symbol) PARAMS ((bfd *));
 317 .  void          (*_bfd_print_symbol) PARAMS ((bfd *, PTR,
 318 .                                      struct symbol_cache_entry *,
 319 .                                      bfd_print_symbol_type));
 320 .#define bfd_print_symbol(b,p,s,e) BFD_SEND(b, _bfd_print_symbol, (b,p,s,e))
 321 .  void          (*_bfd_get_symbol_info) PARAMS ((bfd *,
 322 .                                      struct symbol_cache_entry *,
 323 .                                      symbol_info *));
 324 .#define bfd_get_symbol_info(b,p,e) BFD_SEND(b, _bfd_get_symbol_info, (b,p,e))
 325 .  boolean       (*_bfd_is_local_label) PARAMS ((bfd *, asymbol *));
 326 .
 327 .  alent *    (*_get_lineno) PARAMS ((bfd *, struct symbol_cache_entry *));
 328 .  boolean    (*_bfd_find_nearest_line) PARAMS ((bfd *abfd,
 329 .                    struct sec *section, struct symbol_cache_entry **symbols,
 330 .                    bfd_vma offset, CONST char **file, CONST char **func,
 331 .                    unsigned int *line));
 332 . {* Back-door to allow format-aware applications to create debug symbols
 333 .    while using BFD for everything else.  Currently used by the assembler
 334 .    when creating COFF files.  *}
 335 . asymbol *  (*_bfd_make_debug_symbol) PARAMS ((
 336 .       bfd *abfd,
 337 .       void *ptr,
 338 .       unsigned long size));
 339 .
 340 .  {* Routines for relocs.  *}
 341 .#define BFD_JUMP_TABLE_RELOCS(NAME)\
 342 .CAT(NAME,_get_reloc_upper_bound),\
 343 .CAT(NAME,_canonicalize_reloc),\
 344 .CAT(NAME,_bfd_reloc_type_lookup)
 345 .  long  (*_get_reloc_upper_bound) PARAMS ((bfd *, sec_ptr));
 346 .  long  (*_bfd_canonicalize_reloc) PARAMS ((bfd *, sec_ptr, arelent **,
 347 .                                            struct symbol_cache_entry **));
 348 .  {* See documentation on reloc types.  *}
 349 .  CONST struct reloc_howto_struct *
 350 .       (*reloc_type_lookup) PARAMS ((bfd *abfd,
 351 .                                     bfd_reloc_code_real_type code));
 352 .
 353 .  {* Routines used when writing an object file.  *}
 354 .#define BFD_JUMP_TABLE_WRITE(NAME)\
 355 .CAT(NAME,_set_arch_mach),\
 356 .CAT(NAME,_set_section_contents)
 357 .  boolean    (*_bfd_set_arch_mach) PARAMS ((bfd *, enum bfd_architecture,
 358 .                    unsigned long));
 359 .  boolean       (*_bfd_set_section_contents) PARAMS ((bfd *, sec_ptr, PTR,
 360 .                                            file_ptr, bfd_size_type));
 361 .
 362 .  {* Routines used by the linker.  *}
 363 .#define BFD_JUMP_TABLE_LINK(NAME)\
 364 .CAT(NAME,_sizeof_headers),\
 365 .CAT(NAME,_bfd_get_relocated_section_contents),\
 366 .CAT(NAME,_bfd_relax_section),\
 367 .CAT(NAME,_bfd_link_hash_table_create),\
 368 .CAT(NAME,_bfd_link_add_symbols),\
 369 .CAT(NAME,_bfd_final_link)
 370 .  int        (*_bfd_sizeof_headers) PARAMS ((bfd *, boolean));
 371 .  bfd_byte * (*_bfd_get_relocated_section_contents) PARAMS ((bfd *,
 372 .                    struct bfd_link_info *, struct bfd_link_order *,
 373 .                    bfd_byte *data, boolean relocateable,
 374 .                    struct symbol_cache_entry **));
 375 .
 376 .  boolean    (*_bfd_relax_section) PARAMS ((bfd *, struct sec *,
 377 .                    struct bfd_link_info *, boolean *again));
 378 .
 379 .  {* Create a hash table for the linker.  Different backends store
 380 .     different information in this table.  *}
 381 .  struct bfd_link_hash_table *(*_bfd_link_hash_table_create) PARAMS ((bfd *));
 382 .
 383 .  {* Add symbols from this object file into the hash table.  *}
 384 .  boolean (*_bfd_link_add_symbols) PARAMS ((bfd *, struct bfd_link_info *));
 385 .
 386 .  {* Do a link based on the link_order structures attached to each
 387 .     section of the BFD.  *}
 388 .  boolean (*_bfd_final_link) PARAMS ((bfd *, struct bfd_link_info *));
 389 .
 390 . {* Routines to handle dynamic symbols and relocs.  *}
 391 .#define BFD_JUMP_TABLE_DYNAMIC(NAME)\
 392 .CAT(NAME,_get_dynamic_symtab_upper_bound),\
 393 .CAT(NAME,_canonicalize_dynamic_symtab),\
 394 .CAT(NAME,_get_dynamic_reloc_upper_bound),\
 395 .CAT(NAME,_canonicalize_dynamic_reloc)
 396 .  {* Get the amount of memory required to hold the dynamic symbols. *}
 397 .  long  (*_bfd_get_dynamic_symtab_upper_bound) PARAMS ((bfd *));
 398 .  {* Read in the dynamic symbols.  *}
 399 .  long  (*_bfd_canonicalize_dynamic_symtab)
 400 .    PARAMS ((bfd *, struct symbol_cache_entry **));
 401 .  {* Get the amount of memory required to hold the dynamic relocs.  *}
 402 .  long  (*_bfd_get_dynamic_reloc_upper_bound) PARAMS ((bfd *));
 403 .  {* Read in the dynamic relocs.  *}
 404 .  long  (*_bfd_canonicalize_dynamic_reloc)
 405 .    PARAMS ((bfd *, arelent **, struct symbol_cache_entry **));
 406 .
 407
 408 Data for use by back-end routines, which isn't generic enough to belong
 409 in this structure.
 410
 411 . PTR backend_data;
 412 .} bfd_target;
 413
 414 */
 415
 416 /* All known xvecs (even those that don't compile on all systems).
 417    Alphabetized for easy reference.
 418    They are listed a second time below, since
 419    we can't intermix extern's and initializers.  */
 420 extern bfd_target a29kcoff_big_vec;
 421 extern bfd_target a_out_adobe_vec;
 422 extern bfd_target aout_mips_big_vec;
 423 extern bfd_target aout_mips_little_vec;
 424 extern bfd_target aout0_big_vec;
 425 extern bfd_target apollocoff_vec;
 426 extern bfd_target b_out_vec_big_host;
 427 extern bfd_target b_out_vec_little_host;
 428 extern bfd_target bfd_elf32_big_generic_vec;
 429 extern bfd_target bfd_elf32_bigmips_vec;
 430 extern bfd_target bfd_elf32_hppa_vec;
 431 extern bfd_target bfd_elf32_i386_vec;
 432 extern bfd_target bfd_elf32_i860_vec;
 433 extern bfd_target bfd_elf32_little_generic_vec;
 434 extern bfd_target bfd_elf32_littlemips_vec;
 435 extern bfd_target bfd_elf32_m68k_vec;
 436 extern bfd_target bfd_elf32_m88k_vec;
 437 extern bfd_target bfd_elf32_powerpc_vec;
 438 extern bfd_target bfd_elf32_sparc_vec;
 439 extern bfd_target bfd_elf64_big_generic_vec;
 440 extern bfd_target bfd_elf64_little_generic_vec;
 441 extern bfd_target bfd_elf64_sparc_vec;
 442 extern bfd_target demo_64_vec;
 443 extern bfd_target ecoff_big_vec;
 444 extern bfd_target ecoff_little_vec;
 445 extern bfd_target ecoffalpha_little_vec;
 446 extern bfd_target h8300coff_vec;
 447 extern bfd_target h8500coff_vec;
 448 extern bfd_target host_aout_vec;
 449 extern bfd_target hp300bsd_vec;
 450 extern bfd_target hp300hpux_vec;
 451 extern bfd_target som_vec;
 452 extern bfd_target i386aout_vec;
 453 extern bfd_target i386bsd_vec;
 454 extern bfd_target i386dynix_vec;
 455 extern bfd_target i386os9k_vec;
 456 extern bfd_target netbsd386_vec;
 457 extern bfd_target i386coff_vec;
 458 extern bfd_target go32coff_vec;
 459 extern bfd_target i386linux_vec;
 460 extern bfd_target i386lynx_aout_vec;
 461 extern bfd_target i386lynx_coff_vec;
 462 extern bfd_target i386mach3_vec;
 463 extern bfd_target icoff_big_vec;
 464 extern bfd_target icoff_little_vec;
 465 extern bfd_target ieee_vec;
 466 extern bfd_target m68kcoff_vec;
 467 extern bfd_target m68kcoffun_vec;
 468 extern bfd_target m68klynx_aout_vec;
 469 extern bfd_target m68klynx_coff_vec;
 470 extern bfd_target m88kbcs_vec;
 471 extern bfd_target newsos3_vec;
 472 extern bfd_target nlm32_i386_vec;
 473 extern bfd_target nlm32_sparc_vec;
 474 extern bfd_target nlm32_alpha_vec;
 475 extern bfd_target nlm32_powerpc_vec;
 476 extern bfd_target oasys_vec;
 477 extern bfd_target rs6000coff_vec;
 478 extern bfd_target shcoff_vec;
 479 extern bfd_target sparclynx_aout_vec;
 480 extern bfd_target sparclynx_coff_vec;
 481 extern bfd_target sparccoff_vec;
 482 extern bfd_target sunos_big_vec;
 483 extern bfd_target tekhex_vec;
 484 extern bfd_target we32kcoff_vec;
 485 extern bfd_target z8kcoff_vec;
 486
 487 /* srec is always included.  */
 488 extern bfd_target srec_vec;
 489 extern bfd_target symbolsrec_vec;
 490
 491 /* All of the xvecs for core files.  */
 492 extern bfd_target aix386_core_vec;
 493 extern bfd_target cisco_core_vec;
 494 extern bfd_target hpux_core_vec;
 495 extern bfd_target hppabsd_core_vec;
 496 extern bfd_target irix_core_vec;
 497 extern bfd_target osf_core_vec;
 498 extern bfd_target sco_core_vec;
 499 extern bfd_target trad_core_vec;
 500 extern bfd_target ptrace_core_vec;
 501
 502 bfd_target *bfd_target_vector[] = {
 503
 504 #ifdef SELECT_VECS
 505
 506         SELECT_VECS,
 507
 508 #else /* not SELECT_VECS */
 509
 510 #ifdef DEFAULT_VECTOR
 511         &DEFAULT_VECTOR,
 512 #endif
 513         /* This list is alphabetized to make it easy to compare
 514            with other vector lists -- the decls above and
 515            the case statement in configure.in.
 516            Vectors that don't compile on all systems, or aren't finished,
 517            should have an entry here with #if 0 around it, to show that
 518            it wasn't omitted by mistake.  */
 519         &a29kcoff_big_vec,
 520         &a_out_adobe_vec,
 521 #if 0                           /* No one seems to use this.  */
 522         &aout_mips_big_vec,
 523 #endif
 524         &aout_mips_little_vec,
 525         &b_out_vec_big_host,
 526         &b_out_vec_little_host,
 527
 528         /* This, and other vectors, may not be used in any *.mt configuration.
 529            But that does not mean they are unnecessary.  If configured
 530            --with-targets=all, objdump or gdb should be able to examine
 531            the file even if we don't recognize the machine type.  */
 532         &bfd_elf32_big_generic_vec,
 533         &bfd_elf32_bigmips_vec,
 534         &bfd_elf32_hppa_vec,
 535         &bfd_elf32_i386_vec,
 536         &bfd_elf32_i860_vec,
 537         &bfd_elf32_little_generic_vec,
 538         &bfd_elf32_littlemips_vec,
 539         &bfd_elf32_m68k_vec,
 540         &bfd_elf32_m88k_vec,
 541         &bfd_elf32_sparc_vec,
 542         &bfd_elf32_powerpc_vec,
 543 #ifdef BFD64                    /* No one seems to use this.  */
 544         &bfd_elf64_big_generic_vec,
 545         &bfd_elf64_little_generic_vec,
 546 #endif
 547 #if 0
 548         &bfd_elf64_sparc_vec,
 549 #endif
 550         /* We don't include cisco_core_vec.  Although it has a magic number,
 551            the magic number isn't at the beginning of the file, and thus
 552            might spuriously match other kinds of files.  */
 553 #ifdef BFD64
 554         &demo_64_vec,   /* Only compiled if host has long-long support */
 555 #endif
 556         &ecoff_big_vec,
 557         &ecoff_little_vec,
 558 #if 0
 559         &ecoffalpha_little_vec,
 560 #endif
 561         &h8300coff_vec,
 562         &h8500coff_vec,
 563 #if 0
 564         /* Since a.out files lack decent magic numbers, no way to recognize
 565            which kind of a.out file it is.  */
 566         &host_aout_vec,
 567 #endif
 568 #if 0                           /* Clashes with sunos_big_vec magic no.  */
 569         &hp300bsd_vec,
 570 #endif
 571         &hp300hpux_vec,
 572 #if defined (HOST_HPPAHPUX) || defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
 573         &som_vec,
 574 #endif
 575         &i386aout_vec,
 576         &i386bsd_vec,
 577         &netbsd386_vec,
 578         &i386coff_vec,
 579         &go32coff_vec,
 580 #if 0
 581         /* Since a.out files lack decent magic numbers, no way to recognize
 582            which kind of a.out file it is.  */
 583         &i386linux_vec,
 584 #endif
 585         &i386lynx_aout_vec,
 586         &i386lynx_coff_vec,
 587         &i386os9k_vec,
 588         &icoff_big_vec,
 589         &icoff_little_vec,
 590         &ieee_vec,
 591         &m68kcoff_vec,
 592         &m68kcoffun_vec,
 593         &m68klynx_aout_vec,
 594         &m68klynx_coff_vec,
 595         &m88kbcs_vec,
 596         &newsos3_vec,
 597         &nlm32_i386_vec,
 598         &nlm32_sparc_vec,
 599 #ifdef BFD64
 600         &nlm32_alpha_vec,
 601 #endif
 602 #if 0
 603         /* We have no oasys tools anymore, so we can't test any of this
 604            anymore. If you want to test the stuff yourself, go ahead...
 605            steve@cygnus.com
 606            Worse, since there is no magic number for archives, there
 607            can be annoying target mis-matches.  */
 608         &oasys_vec,
 609 #endif
 610         &rs6000coff_vec,
 611         &shcoff_vec,
 612         &sparclynx_aout_vec,
 613         &sparclynx_coff_vec,
 614         &sunos_big_vec,
 615         &aout0_big_vec,
 616 #if 0
 617         &tekhex_vec,
 618 #endif
 619         &we32kcoff_vec,
 620         &z8kcoff_vec,
 621
 622 #endif /* not SELECT_VECS */
 623
 624 /* Always support S-records, for convenience.  */
 625         &srec_vec,
 626         &symbolsrec_vec,
 627
 628 /* Add any required traditional-core-file-handler.  */
 629
 630 #ifdef AIX386_CORE
 631         &aix386_core_vec,
 632 #endif
 633 #ifdef HPUX_CORE
 634         &hpux_core_vec,
 635 #endif
 636 #ifdef HPPABSD_CORE
 637         &hppabsd_core_vec,
 638 #endif
 639 #ifdef IRIX_CORE
 640         &irix_core_vec,
 641 #endif
 642 #ifdef OSF_CORE
 643         &osf_core_vec,
 644 #endif
 645 #ifdef  TRAD_CORE
 646         &trad_core_vec,
 647 #endif
 648
 649 #ifdef  PTRACE_CORE
 650         &ptrace_core_vec,
 651 #endif
 652
 653         NULL /* end of list marker */
 654 };
 655
 656 /* bfd_default_vector[0] contains either the address of the default vector,
 657    if there is one, or zero if there isn't.  */
 658
 659 bfd_target *bfd_default_vector[] = {
 660 #ifdef DEFAULT_VECTOR
 661         &DEFAULT_VECTOR,
 662 #endif
 663         NULL
 664 };
 665
 666 /* When there is an ambiguous match, bfd_check_format_matches puts the
 667    names of the matching targets in an array.  This variable is the maximum
 668    number of entries that the array could possibly need.  */
 669 CONST size_t _bfd_target_vector_entries = sizeof(bfd_target_vector)/sizeof(*bfd_target_vector);
 670
 671 /*
 672 FUNCTION
 673         bfd_find_target
 674
 675 SYNOPSIS
 676         bfd_target *bfd_find_target(CONST char *target_name, bfd *abfd);
 677
 678 DESCRIPTION
 679         Return a pointer to the transfer vector for the object target
 680         named @var{target_name}.  If @var{target_name} is <<NULL>>, choose the
 681         one in the environment variable <<GNUTARGET>>; if that is null or not
 682         defined, then choose the first entry in the target list.
 683         Passing in the string "default" or setting the environment
 684         variable to "default" will cause the first entry in the target
 685         list to be returned, and "target_defaulted" will be set in the
 686         BFD.  This causes <<bfd_check_format>> to loop over all the
 687         targets to find the one that matches the file being read.
 688 */
 689
 690 bfd_target *
 691 bfd_find_target (target_name, abfd)
 692      CONST char *target_name;
 693      bfd *abfd;
 694 {
 695   bfd_target **target;
 696   extern char *getenv ();
 697   CONST char *targname = (target_name ? target_name :
 698                           (CONST char *) getenv ("GNUTARGET"));
 699
 700   /* This is safe; the vector cannot be null */
 701   if (targname == NULL || !strcmp (targname, "default")) {
 702     abfd->target_defaulted = true;
 703     return abfd->xvec = bfd_target_vector[0];
 704   }
 705
 706   abfd->target_defaulted = false;
 707
 708   for (target = &bfd_target_vector[0]; *target != NULL; target++) {
 709     if (!strcmp (targname, (*target)->name))
 710       return abfd->xvec = *target;
 711   }
 712
 713   bfd_set_error (bfd_error_invalid_target);
 714   return NULL;
 715 }
 716
 717
 718 /*
 719 FUNCTION
 720         bfd_target_list
 721
 722 SYNOPSIS
 723         CONST char **bfd_target_list(void);
 724
 725 DESCRIPTION
 726         Return a freshly malloced NULL-terminated
 727         vector of the names of all the valid BFD targets. Do not
 728         modify the names.
 729
 730 */
 731
 732 CONST char **
 733 bfd_target_list ()
 734 {
 735   int vec_length= 0;
 736 #ifdef NATIVE_HPPAHPUX_COMPILER
 737   /* The native compiler on the HP9000/700 has a bug which causes it
 738      to loop endlessly when compiling this file.  This avoids it.  */
 739   volatile
 740 #endif
 741     bfd_target **target;
 742   CONST  char **name_list, **name_ptr;
 743
 744   for (target = &bfd_target_vector[0]; *target != NULL; target++)
 745     vec_length++;
 746
 747   name_ptr = name_list = (CONST char **)
 748     bfd_zmalloc ((vec_length + 1) * sizeof (char **));
 749
 750   if (name_list == NULL) {
 751     bfd_set_error (bfd_error_no_memory);
 752     return NULL;
 753   }
 754
 755   for (target = &bfd_target_vector[0]; *target != NULL; target++)
 756     *(name_ptr++) = (*target)->name;
 757
 758   return name_list;
 759 }