bfd/libbfd-in.h

   1 /* libbfd.h -- Declarations used by bfd library *implementation*.
   2    (This include file is not for users of the library.)
   3
   4    Copyright (C) 1990-2024 Free Software Foundation, Inc.
   5
   6    Written by Cygnus Support.
   7
   8    This file is part of BFD, the Binary File Descriptor library.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  23    MA 02110-1301, USA.  */
  24
  25 #ifndef _LIBBFD_H
  26 #define _LIBBFD_H 1
  27
  28 #ifndef ATTRIBUTE_HIDDEN
  29 #if HAVE_HIDDEN
  30 #define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden")))
  31 #else
  32 #define ATTRIBUTE_HIDDEN
  33 #endif
  34 #endif
  35
  36 #include "hashtab.h"
  37
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41
  42 /* Set a tdata field.  Can't use the other macros for this, since they
  43    do casts, and casting to the left of assignment isn't portable.  */
  44 #define set_tdata(bfd, v) ((bfd)->tdata.any = (v))
  45
  46 /* If BFD_IN_MEMORY is set for a BFD, then the iostream fields points
  47    to an instance of this structure.  */
  48
  49 struct bfd_in_memory
  50 {
  51   /* Size of buffer.  */
  52   bfd_size_type size;
  53   /* Buffer holding contents of BFD.  */
  54   bfd_byte *buffer;
  55 };
  56
  57 struct section_hash_entry
  58 {
  59   struct bfd_hash_entry root;
  60   asection section;
  61 };
  62
  63 /* Unique section id.  */
  64 extern unsigned int _bfd_section_id ATTRIBUTE_HIDDEN;
  65
  66 /* tdata for an archive.  For an input archive, cache
  67    needs to be free()'d.  For an output archive, symdefs do.  */
  68
  69 struct artdata
  70 {
  71   ufile_ptr first_file_filepos;
  72   /* Speed up searching the armap */
  73   htab_t cache;
  74   carsym *symdefs;              /* The symdef entries.  */
  75   symindex symdef_count;        /* How many there are.  */
  76   char *extended_names;         /* Clever intel extension.  */
  77   bfd_size_type extended_names_size; /* Size of extended names.  */
  78   /* When more compilers are standard C, this can be a time_t.  */
  79   long  armap_timestamp;        /* Timestamp value written into armap.
  80                                    This is used for BSD archives to check
  81                                    that the timestamp is recent enough
  82                                    for the BSD linker to not complain,
  83                                    just before we finish writing an
  84                                    archive.  */
  85   file_ptr armap_datepos;       /* Position within archive to seek to
  86                                    rewrite the date field.  */
  87   void *tdata;                  /* Backend specific information.  */
  88 };
  89
  90 #define bfd_ardata(bfd) ((bfd)->tdata.aout_ar_data)
  91
  92 /* Goes in bfd's arelt_data slot */
  93 struct areltdata
  94 {
  95   char * arch_header;           /* It's actually a string.  */
  96   bfd_size_type parsed_size;    /* Octets of filesize not including ar_hdr.  */
  97   bfd_size_type extra_size;     /* BSD4.4: extra bytes after the header.  */
  98   char *filename;               /* Null-terminated.  */
  99   file_ptr origin;              /* For element of a thin archive.  */
 100   void *parent_cache;           /* Where and how to find this member.  */
 101   file_ptr key;
 102 };
 103
 104 #define arelt_size(bfd) (((struct areltdata *)((bfd)->arelt_data))->parsed_size)
 105
 106 extern void *bfd_malloc
 107   (bfd_size_type) ATTRIBUTE_HIDDEN;
 108
 109 static inline char *
 110 bfd_strdup (const char *str)
 111 {
 112   size_t len = strlen (str) + 1;
 113   char *buf = bfd_malloc (len);
 114   if (buf != NULL)
 115     memcpy (buf, str, len);
 116   return buf;
 117 }
 118
 119 extern bfd * _bfd_create_empty_archive_element_shell
 120   (bfd *) ATTRIBUTE_HIDDEN;
 121 extern bfd * _bfd_look_for_bfd_in_cache
 122   (bfd *, file_ptr) ATTRIBUTE_HIDDEN;
 123 extern bool _bfd_add_bfd_to_archive_cache
 124   (bfd *, file_ptr, bfd *) ATTRIBUTE_HIDDEN;
 125 extern bool _bfd_generic_mkarchive
 126   (bfd *) ATTRIBUTE_HIDDEN;
 127 extern char *_bfd_append_relative_path
 128   (bfd *, char *) ATTRIBUTE_HIDDEN;
 129 extern bfd_cleanup bfd_generic_archive_p
 130   (bfd *) ATTRIBUTE_HIDDEN;
 131 extern bool bfd_slurp_armap
 132   (bfd *) ATTRIBUTE_HIDDEN;
 133 #define bfd_slurp_bsd_armap bfd_slurp_armap
 134 #define bfd_slurp_coff_armap bfd_slurp_armap
 135 extern bool _bfd_archive_64_bit_slurp_armap
 136   (bfd *) ATTRIBUTE_HIDDEN;
 137 extern bool _bfd_archive_64_bit_write_armap
 138   (bfd *, unsigned int, struct orl *, unsigned int, int) ATTRIBUTE_HIDDEN;
 139 #define _bfd_archive_64_bit_slurp_extended_name_table \
 140   _bfd_slurp_extended_name_table
 141 #define _bfd_archive_64_bit_construct_extended_name_table \
 142   _bfd_archive_coff_construct_extended_name_table
 143 #define _bfd_archive_64_bit_truncate_arname \
 144   bfd_dont_truncate_arname
 145 #define _bfd_archive_64_bit_read_ar_hdr \
 146   _bfd_generic_read_ar_hdr
 147 #define _bfd_archive_64_bit_write_ar_hdr \
 148   _bfd_generic_write_ar_hdr
 149 #define _bfd_archive_64_bit_openr_next_archived_file \
 150   bfd_generic_openr_next_archived_file
 151 #define _bfd_archive_64_bit_get_elt_at_index \
 152   _bfd_generic_get_elt_at_index
 153 #define _bfd_archive_64_bit_generic_stat_arch_elt \
 154   bfd_generic_stat_arch_elt
 155 #define _bfd_archive_64_bit_update_armap_timestamp _bfd_bool_bfd_true
 156
 157 extern bool _bfd_slurp_extended_name_table
 158   (bfd *) ATTRIBUTE_HIDDEN;
 159 extern bool _bfd_construct_extended_name_table
 160   (bfd *, bool, char **, bfd_size_type *) ATTRIBUTE_HIDDEN;
 161 extern bool _bfd_write_archive_contents
 162   (bfd *) ATTRIBUTE_HIDDEN;
 163 extern bool _bfd_compute_and_write_armap
 164   (bfd *, unsigned int) ATTRIBUTE_HIDDEN;
 165 extern bfd *_bfd_get_elt_at_filepos
 166   (bfd *, file_ptr, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 167 extern bfd *_bfd_generic_get_elt_at_index
 168   (bfd *, symindex) ATTRIBUTE_HIDDEN;
 169
 170 extern bool _bfd_bool_bfd_false
 171   (bfd *) ATTRIBUTE_HIDDEN;
 172 extern bool _bfd_bool_bfd_asymbol_false
 173   (bfd *, asymbol *) ATTRIBUTE_HIDDEN;
 174 extern bool _bfd_bool_bfd_false_error
 175   (bfd *) ATTRIBUTE_HIDDEN;
 176 extern bool _bfd_bool_bfd_link_false_error
 177   (bfd *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 178 extern bool _bfd_bool_bfd_true
 179   (bfd *) ATTRIBUTE_HIDDEN;
 180 extern bool _bfd_bool_bfd_link_true
 181   (bfd *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 182 extern bool _bfd_bool_bfd_bfd_true
 183   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 184 extern bool _bfd_bool_bfd_uint_true
 185   (bfd *, unsigned int) ATTRIBUTE_HIDDEN;
 186 extern bool _bfd_bool_bfd_asection_bfd_asection_true
 187   (bfd *, asection *, bfd *, asection *) ATTRIBUTE_HIDDEN;
 188 extern bool _bfd_bool_bfd_asymbol_bfd_asymbol_true
 189   (bfd *, asymbol *, bfd *, asymbol *) ATTRIBUTE_HIDDEN;
 190 extern bool _bfd_bool_bfd_ptr_true
 191   (bfd *, void *) ATTRIBUTE_HIDDEN;
 192 extern void *_bfd_ptr_bfd_null_error
 193   (bfd *) ATTRIBUTE_HIDDEN;
 194 extern int _bfd_int_bfd_0
 195   (bfd *) ATTRIBUTE_HIDDEN;
 196 extern unsigned int _bfd_uint_bfd_0
 197   (bfd *) ATTRIBUTE_HIDDEN;
 198 extern long _bfd_long_bfd_0
 199   (bfd *) ATTRIBUTE_HIDDEN;
 200 extern long _bfd_long_bfd_n1_error
 201   (bfd *) ATTRIBUTE_HIDDEN;
 202 extern void _bfd_void_bfd
 203   (bfd *) ATTRIBUTE_HIDDEN;
 204 extern void _bfd_void_bfd_link
 205   (bfd *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 206 extern void _bfd_void_bfd_asection
 207   (bfd *, asection *) ATTRIBUTE_HIDDEN;
 208
 209 extern bfd_cleanup _bfd_dummy_target
 210   (bfd *) ATTRIBUTE_HIDDEN;
 211 #define _bfd_no_cleanup _bfd_void_bfd
 212
 213 extern void bfd_dont_truncate_arname
 214   (bfd *, const char *, char *) ATTRIBUTE_HIDDEN;
 215 extern void bfd_bsd_truncate_arname
 216   (bfd *, const char *, char *) ATTRIBUTE_HIDDEN;
 217 extern void bfd_gnu_truncate_arname
 218   (bfd *, const char *, char *) ATTRIBUTE_HIDDEN;
 219
 220 extern bool _bfd_bsd_write_armap
 221   (bfd *, unsigned int, struct orl *, unsigned int, int) ATTRIBUTE_HIDDEN;
 222
 223 extern bool _bfd_coff_write_armap
 224   (bfd *, unsigned int, struct orl *, unsigned int, int) ATTRIBUTE_HIDDEN;
 225
 226 extern void *_bfd_generic_read_ar_hdr
 227   (bfd *) ATTRIBUTE_HIDDEN;
 228 extern void _bfd_ar_spacepad
 229   (char *, size_t, const char *, long) ATTRIBUTE_HIDDEN;
 230 extern bool _bfd_ar_sizepad
 231   (char *, size_t, bfd_size_type) ATTRIBUTE_HIDDEN;
 232
 233 extern void *_bfd_generic_read_ar_hdr_mag
 234   (bfd *, const char *) ATTRIBUTE_HIDDEN;
 235
 236 extern bool _bfd_generic_write_ar_hdr
 237   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 238
 239 extern bool _bfd_bsd44_write_ar_hdr
 240   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 241
 242 extern bfd * bfd_generic_openr_next_archived_file
 243   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 244
 245 extern int bfd_generic_stat_arch_elt
 246   (bfd *, struct stat *) ATTRIBUTE_HIDDEN;
 247
 248 #define _bfd_read_ar_hdr(abfd) \
 249         BFD_SEND (abfd, _bfd_read_ar_hdr_fn, (abfd))
 250 #define _bfd_write_ar_hdr(archive, abfd)         \
 251         BFD_SEND (abfd, _bfd_write_ar_hdr_fn, (archive, abfd))
 252 \f
 253 /* Generic routines to use for BFD_JUMP_TABLE_GENERIC.  Use
 254    BFD_JUMP_TABLE_GENERIC (_bfd_generic).  */
 255
 256 #define _bfd_generic_close_and_cleanup _bfd_archive_close_and_cleanup
 257 extern bool _bfd_archive_close_and_cleanup
 258   (bfd *) ATTRIBUTE_HIDDEN;
 259 extern void _bfd_unlink_from_archive_parent (bfd *) ATTRIBUTE_HIDDEN;
 260 #define _bfd_generic_bfd_free_cached_info _bfd_free_cached_info
 261 extern bool _bfd_generic_new_section_hook
 262   (bfd *, asection *) ATTRIBUTE_HIDDEN;
 263 extern bool _bfd_generic_get_section_contents
 264   (bfd *, asection *, void *, file_ptr, bfd_size_type) ATTRIBUTE_HIDDEN;
 265
 266 /* Generic routines to use for BFD_JUMP_TABLE_COPY.  Use
 267    BFD_JUMP_TABLE_COPY (_bfd_generic).  */
 268
 269 #define _bfd_generic_bfd_copy_private_bfd_data _bfd_bool_bfd_bfd_true
 270 #define _bfd_generic_bfd_merge_private_bfd_data \
 271   _bfd_bool_bfd_link_true
 272 #define _bfd_generic_bfd_set_private_flags _bfd_bool_bfd_uint_true
 273 #define _bfd_generic_bfd_copy_private_section_data \
 274   _bfd_bool_bfd_asection_bfd_asection_true
 275 #define _bfd_generic_bfd_copy_private_symbol_data \
 276   _bfd_bool_bfd_asymbol_bfd_asymbol_true
 277 #define _bfd_generic_bfd_copy_private_header_data _bfd_bool_bfd_bfd_true
 278 #define _bfd_generic_bfd_print_private_bfd_data _bfd_bool_bfd_ptr_true
 279
 280 extern bool _bfd_generic_init_private_section_data
 281   (bfd *, asection *, bfd *, asection *, struct bfd_link_info *)
 282   ATTRIBUTE_HIDDEN;
 283
 284 /* Routines to use for BFD_JUMP_TABLE_CORE when there is no core file
 285    support.  Use BFD_JUMP_TABLE_CORE (_bfd_nocore).  */
 286
 287 extern char *_bfd_nocore_core_file_failing_command
 288   (bfd *) ATTRIBUTE_HIDDEN;
 289 extern int _bfd_nocore_core_file_failing_signal
 290   (bfd *) ATTRIBUTE_HIDDEN;
 291 extern bool _bfd_nocore_core_file_matches_executable_p
 292   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 293 extern int _bfd_nocore_core_file_pid
 294   (bfd *) ATTRIBUTE_HIDDEN;
 295
 296 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE when there is no archive
 297    file support.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive).  */
 298
 299 #define _bfd_noarchive_slurp_armap _bfd_bool_bfd_false_error
 300 #define _bfd_noarchive_slurp_extended_name_table _bfd_bool_bfd_false_error
 301 extern bool _bfd_noarchive_construct_extended_name_table
 302   (bfd *, char **, bfd_size_type *, const char **) ATTRIBUTE_HIDDEN;
 303 extern void _bfd_noarchive_truncate_arname
 304   (bfd *, const char *, char *) ATTRIBUTE_HIDDEN;
 305 extern bool _bfd_noarchive_write_armap
 306   (bfd *, unsigned int, struct orl *, unsigned int, int) ATTRIBUTE_HIDDEN;
 307 #define _bfd_noarchive_read_ar_hdr _bfd_ptr_bfd_null_error
 308 extern bool _bfd_noarchive_write_ar_hdr
 309   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 310 extern bfd *
 311 _bfd_noarchive_openr_next_archived_file
 312   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 313 extern bfd * _bfd_noarchive_get_elt_at_index
 314   (bfd *, symindex) ATTRIBUTE_HIDDEN;
 315 #define _bfd_noarchive_generic_stat_arch_elt bfd_generic_stat_arch_elt
 316 #define _bfd_noarchive_update_armap_timestamp _bfd_bool_bfd_false_error
 317
 318 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE to get BSD style
 319    archives.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd).  */
 320
 321 #define _bfd_archive_bsd_slurp_armap bfd_slurp_bsd_armap
 322 #define _bfd_archive_bsd_slurp_extended_name_table \
 323   _bfd_slurp_extended_name_table
 324 extern bool _bfd_archive_bsd_construct_extended_name_table
 325   (bfd *, char **, bfd_size_type *, const char **) ATTRIBUTE_HIDDEN;
 326 #define _bfd_archive_bsd_truncate_arname bfd_bsd_truncate_arname
 327 #define _bfd_archive_bsd_write_armap _bfd_bsd_write_armap
 328 #define _bfd_archive_bsd_read_ar_hdr _bfd_generic_read_ar_hdr
 329 #define _bfd_archive_bsd_write_ar_hdr _bfd_generic_write_ar_hdr
 330 #define _bfd_archive_bsd_openr_next_archived_file \
 331   bfd_generic_openr_next_archived_file
 332 #define _bfd_archive_bsd_get_elt_at_index _bfd_generic_get_elt_at_index
 333 #define _bfd_archive_bsd_generic_stat_arch_elt \
 334   bfd_generic_stat_arch_elt
 335 extern bool _bfd_archive_bsd_update_armap_timestamp
 336   (bfd *) ATTRIBUTE_HIDDEN;
 337
 338 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE to get COFF style
 339    archives.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff).  */
 340
 341 #define _bfd_archive_coff_slurp_armap bfd_slurp_coff_armap
 342 #define _bfd_archive_coff_slurp_extended_name_table \
 343   _bfd_slurp_extended_name_table
 344 extern bool _bfd_archive_coff_construct_extended_name_table
 345   (bfd *, char **, bfd_size_type *, const char **) ATTRIBUTE_HIDDEN;
 346 #define _bfd_archive_coff_truncate_arname bfd_dont_truncate_arname
 347 #define _bfd_archive_coff_write_armap _bfd_coff_write_armap
 348 #define _bfd_archive_coff_read_ar_hdr _bfd_generic_read_ar_hdr
 349 #define _bfd_archive_coff_write_ar_hdr _bfd_generic_write_ar_hdr
 350 #define _bfd_archive_coff_openr_next_archived_file \
 351   bfd_generic_openr_next_archived_file
 352 #define _bfd_archive_coff_get_elt_at_index _bfd_generic_get_elt_at_index
 353 #define _bfd_archive_coff_generic_stat_arch_elt \
 354   bfd_generic_stat_arch_elt
 355 #define _bfd_archive_coff_update_armap_timestamp _bfd_bool_bfd_true
 356
 357 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE to get BSD4.4 style
 358    archives.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd44).  */
 359
 360 #define _bfd_archive_bsd44_slurp_armap bfd_slurp_bsd_armap
 361 #define _bfd_archive_bsd44_slurp_extended_name_table \
 362   _bfd_slurp_extended_name_table
 363 extern bool _bfd_archive_bsd44_construct_extended_name_table
 364   (bfd *, char **, bfd_size_type *, const char **) ATTRIBUTE_HIDDEN;
 365 #define _bfd_archive_bsd44_truncate_arname bfd_bsd_truncate_arname
 366 #define _bfd_archive_bsd44_write_armap _bfd_bsd_write_armap
 367 #define _bfd_archive_bsd44_read_ar_hdr _bfd_generic_read_ar_hdr
 368 #define _bfd_archive_bsd44_write_ar_hdr _bfd_bsd44_write_ar_hdr
 369 #define _bfd_archive_bsd44_openr_next_archived_file \
 370   bfd_generic_openr_next_archived_file
 371 #define _bfd_archive_bsd44_get_elt_at_index _bfd_generic_get_elt_at_index
 372 #define _bfd_archive_bsd44_generic_stat_arch_elt \
 373   bfd_generic_stat_arch_elt
 374 #define _bfd_archive_bsd44_update_armap_timestamp \
 375   _bfd_archive_bsd_update_armap_timestamp
 376
 377 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE to get VMS style
 378    archives.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_vms_lib).  Some of them
 379    are irrelevant.  */
 380
 381 extern bool _bfd_vms_lib_write_archive_contents
 382   (bfd *) ATTRIBUTE_HIDDEN;
 383 #define _bfd_vms_lib_slurp_armap _bfd_noarchive_slurp_armap
 384 #define _bfd_vms_lib_slurp_extended_name_table \
 385   _bfd_noarchive_slurp_extended_name_table
 386 #define _bfd_vms_lib_construct_extended_name_table \
 387   _bfd_noarchive_construct_extended_name_table
 388 #define _bfd_vms_lib_truncate_arname _bfd_noarchive_truncate_arname
 389 #define _bfd_vms_lib_write_armap _bfd_noarchive_write_armap
 390 #define _bfd_vms_lib_read_ar_hdr _bfd_noarchive_read_ar_hdr
 391 #define _bfd_vms_lib_write_ar_hdr _bfd_noarchive_write_ar_hdr
 392 extern bfd *_bfd_vms_lib_openr_next_archived_file
 393   (bfd *, bfd *) ATTRIBUTE_HIDDEN;
 394 extern bfd *_bfd_vms_lib_get_elt_at_index
 395   (bfd *, symindex) ATTRIBUTE_HIDDEN;
 396 extern int _bfd_vms_lib_generic_stat_arch_elt
 397   (bfd *, struct stat *) ATTRIBUTE_HIDDEN;
 398 #define _bfd_vms_lib_update_armap_timestamp _bfd_bool_bfd_true
 399
 400 /* Extra routines for VMS style archives.  */
 401
 402 extern symindex _bfd_vms_lib_find_symbol
 403   (bfd *, const char *) ATTRIBUTE_HIDDEN;
 404 extern bfd *_bfd_vms_lib_get_imagelib_file
 405   (bfd *) ATTRIBUTE_HIDDEN;
 406 extern bfd_cleanup _bfd_vms_lib_alpha_archive_p
 407   (bfd *) ATTRIBUTE_HIDDEN;
 408 extern bfd_cleanup _bfd_vms_lib_ia64_archive_p
 409   (bfd *) ATTRIBUTE_HIDDEN;
 410 extern bool _bfd_vms_lib_alpha_mkarchive
 411   (bfd *) ATTRIBUTE_HIDDEN;
 412 extern bool _bfd_vms_lib_ia64_mkarchive
 413   (bfd *) ATTRIBUTE_HIDDEN;
 414
 415 /* Routines to use for BFD_JUMP_TABLE_SYMBOLS where there is no symbol
 416    support.  Use BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols).  */
 417
 418 #define _bfd_nosymbols_get_symtab_upper_bound _bfd_long_bfd_n1_error
 419 extern long _bfd_nosymbols_canonicalize_symtab
 420   (bfd *, asymbol **) ATTRIBUTE_HIDDEN;
 421 #define _bfd_nosymbols_make_empty_symbol _bfd_generic_make_empty_symbol
 422 extern void _bfd_nosymbols_print_symbol
 423   (bfd *, void *, asymbol *, bfd_print_symbol_type) ATTRIBUTE_HIDDEN;
 424 extern void _bfd_nosymbols_get_symbol_info
 425   (bfd *, asymbol *, symbol_info *) ATTRIBUTE_HIDDEN;
 426 extern const char * _bfd_nosymbols_get_symbol_version_string
 427   (bfd *, asymbol *, bool, bool *) ATTRIBUTE_HIDDEN;
 428 extern bool _bfd_nosymbols_bfd_is_local_label_name
 429   (bfd *, const char *) ATTRIBUTE_HIDDEN;
 430 #define _bfd_nosymbols_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false
 431 extern alent *_bfd_nosymbols_get_lineno
 432   (bfd *, asymbol *) ATTRIBUTE_HIDDEN;
 433 extern bool _bfd_nosymbols_find_nearest_line
 434   (bfd *, asymbol **, asection *, bfd_vma,
 435    const char **, const char **, unsigned int *, unsigned int *)
 436   ATTRIBUTE_HIDDEN;
 437 extern bool _bfd_nosymbols_find_nearest_line_with_alt
 438   (bfd *, const char *, asymbol **, asection *, bfd_vma,
 439    const char **, const char **, unsigned int *, unsigned int *)
 440   ATTRIBUTE_HIDDEN;
 441 extern bool _bfd_nosymbols_find_line
 442   (bfd *, asymbol **, asymbol *, const char **, unsigned int *)
 443   ATTRIBUTE_HIDDEN;
 444 extern bool _bfd_nosymbols_find_inliner_info
 445   (bfd *, const char **, const char **, unsigned int *) ATTRIBUTE_HIDDEN;
 446 extern asymbol *_bfd_nosymbols_bfd_make_debug_symbol
 447   (bfd *) ATTRIBUTE_HIDDEN;
 448 extern long _bfd_nosymbols_read_minisymbols
 449   (bfd *, bool, void **, unsigned int *) ATTRIBUTE_HIDDEN;
 450 extern asymbol *_bfd_nosymbols_minisymbol_to_symbol
 451   (bfd *, bool, const void *, asymbol *) ATTRIBUTE_HIDDEN;
 452
 453 /* Routines to use for BFD_JUMP_TABLE_RELOCS when there is no reloc
 454    support.  Use BFD_JUMP_TABLE_RELOCS (_bfd_norelocs).  */
 455
 456 extern long _bfd_norelocs_get_reloc_upper_bound
 457   (bfd *, asection *) ATTRIBUTE_HIDDEN;
 458 extern long _bfd_norelocs_canonicalize_reloc
 459   (bfd *, asection *, arelent **, asymbol **) ATTRIBUTE_HIDDEN;
 460 extern void _bfd_norelocs_set_reloc
 461   (bfd *, asection *, arelent **, unsigned int) ATTRIBUTE_HIDDEN;
 462 extern reloc_howto_type *_bfd_norelocs_bfd_reloc_type_lookup
 463   (bfd *, bfd_reloc_code_real_type) ATTRIBUTE_HIDDEN;
 464 extern reloc_howto_type *_bfd_norelocs_bfd_reloc_name_lookup
 465   (bfd *, const char *) ATTRIBUTE_HIDDEN;
 466
 467 /* Routines to use for BFD_JUMP_TABLE_WRITE for targets which may not
 468    be written.  Use BFD_JUMP_TABLE_WRITE (_bfd_nowrite).  */
 469
 470 extern bool _bfd_nowrite_set_arch_mach
 471   (bfd *, enum bfd_architecture, unsigned long) ATTRIBUTE_HIDDEN;
 472 extern bool _bfd_nowrite_set_section_contents
 473   (bfd *, asection *, const void *, file_ptr, bfd_size_type) ATTRIBUTE_HIDDEN;
 474
 475 /* Generic routines to use for BFD_JUMP_TABLE_WRITE.  Use
 476    BFD_JUMP_TABLE_WRITE (_bfd_generic).  */
 477
 478 #define _bfd_generic_set_arch_mach bfd_default_set_arch_mach
 479 extern bool _bfd_generic_set_section_contents
 480   (bfd *, asection *, const void *, file_ptr, bfd_size_type) ATTRIBUTE_HIDDEN;
 481
 482 /* Routines to use for BFD_JUMP_TABLE_LINK for targets which do not
 483    support linking.  Use BFD_JUMP_TABLE_LINK (_bfd_nolink).  */
 484
 485 extern int _bfd_nolink_sizeof_headers
 486   (bfd *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 487 extern bfd_byte *_bfd_nolink_bfd_get_relocated_section_contents
 488   (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 489    bfd_byte *, bool, asymbol **) ATTRIBUTE_HIDDEN;
 490 extern bool _bfd_nolink_bfd_relax_section
 491   (bfd *, asection *, struct bfd_link_info *, bool *) ATTRIBUTE_HIDDEN;
 492 #define _bfd_nolink_bfd_gc_sections _bfd_bool_bfd_link_false_error
 493 extern bool _bfd_nolink_bfd_lookup_section_flags
 494   (struct bfd_link_info *, struct flag_info *, asection *) ATTRIBUTE_HIDDEN;
 495 #define _bfd_nolink_bfd_merge_sections _bfd_bool_bfd_link_false_error
 496 extern bool _bfd_nolink_bfd_is_group_section
 497   (bfd *, const asection *) ATTRIBUTE_HIDDEN;
 498 extern const char *_bfd_nolink_bfd_group_name
 499   (bfd *, const asection *) ATTRIBUTE_HIDDEN;
 500 extern bool _bfd_nolink_bfd_discard_group
 501   (bfd *, asection *) ATTRIBUTE_HIDDEN;
 502 extern struct bfd_link_hash_table *_bfd_nolink_bfd_link_hash_table_create
 503   (bfd *) ATTRIBUTE_HIDDEN;
 504 #define _bfd_nolink_bfd_link_add_symbols _bfd_bool_bfd_link_false_error
 505 extern void _bfd_nolink_bfd_link_just_syms
 506   (asection *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 507 extern void _bfd_nolink_bfd_copy_link_hash_symbol_type
 508   (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *)
 509   ATTRIBUTE_HIDDEN;
 510 #define _bfd_nolink_bfd_final_link _bfd_bool_bfd_link_false_error
 511 extern bool _bfd_nolink_bfd_link_split_section
 512   (bfd *, struct bfd_section *) ATTRIBUTE_HIDDEN;
 513 extern bool _bfd_nolink_section_already_linked
 514   (bfd *, asection *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 515 extern bool _bfd_nolink_bfd_define_common_symbol
 516   (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *)
 517   ATTRIBUTE_HIDDEN;
 518 #define _bfd_nolink_bfd_link_hide_symbol \
 519   _bfd_generic_link_hide_symbol
 520 extern struct bfd_link_hash_entry *_bfd_nolink_bfd_define_start_stop
 521   (struct bfd_link_info *, const char *, asection *) ATTRIBUTE_HIDDEN;
 522 #define _bfd_nolink_bfd_link_check_relocs \
 523   _bfd_generic_link_check_relocs
 524
 525 /* Routines to use for BFD_JUMP_TABLE_DYNAMIC for targets which do not
 526    have dynamic symbols or relocs.  Use BFD_JUMP_TABLE_DYNAMIC
 527    (_bfd_nodynamic).  */
 528
 529 #define _bfd_nodynamic_get_dynamic_symtab_upper_bound _bfd_long_bfd_n1_error
 530 #define _bfd_nodynamic_canonicalize_dynamic_symtab \
 531   _bfd_nosymbols_canonicalize_symtab
 532 extern long _bfd_nodynamic_get_synthetic_symtab
 533   (bfd *, long, asymbol **, long, asymbol **, asymbol **) ATTRIBUTE_HIDDEN;
 534 #define _bfd_nodynamic_get_dynamic_reloc_upper_bound _bfd_long_bfd_n1_error
 535 extern long _bfd_nodynamic_canonicalize_dynamic_reloc
 536   (bfd *, arelent **, asymbol **) ATTRIBUTE_HIDDEN;
 537 \f
 538 /* Generic routine to determine of the given symbol is a local
 539    label.  */
 540 extern bool bfd_generic_is_local_label_name
 541   (bfd *, const char *) ATTRIBUTE_HIDDEN;
 542
 543 /* Generic minisymbol routines.  */
 544 extern long _bfd_generic_read_minisymbols
 545   (bfd *, bool, void **, unsigned int *) ATTRIBUTE_HIDDEN;
 546 extern asymbol *_bfd_generic_minisymbol_to_symbol
 547   (bfd *, bool, const void *, asymbol *) ATTRIBUTE_HIDDEN;
 548
 549 /* Find the nearest line using .stab/.stabstr sections.  */
 550 extern bool _bfd_stab_section_find_nearest_line
 551   (bfd *, asymbol **, asection *, bfd_vma, bool *,
 552    const char **, const char **, unsigned int *, void **) ATTRIBUTE_HIDDEN;
 553
 554 /* Find the nearest line using DWARF 1 debugging information.  */
 555 extern bool _bfd_dwarf1_find_nearest_line
 556   (bfd *, asymbol **, asection *, bfd_vma,
 557    const char **, const char **, unsigned int *) ATTRIBUTE_HIDDEN;
 558
 559 /* Clean up the data used to handle DWARF 1 debugging information. */
 560 extern void _bfd_dwarf1_cleanup_debug_info
 561   (bfd *, void **) ATTRIBUTE_HIDDEN;
 562
 563 struct dwarf_debug_section
 564 {
 565   const char * uncompressed_name;
 566   const char * compressed_name;
 567 };
 568
 569 /* Map of uncompressed DWARF debug section name to compressed one.  It
 570    is terminated by NULL uncompressed_name.  */
 571
 572 extern const struct dwarf_debug_section dwarf_debug_sections[] ATTRIBUTE_HIDDEN;
 573
 574 /* Find the nearest line using DWARF 2 debugging information.  */
 575 extern int _bfd_dwarf2_find_nearest_line
 576   (bfd *, asymbol **, asymbol *, asection *, bfd_vma,
 577    const char **, const char **, unsigned int *, unsigned int *,
 578    const struct dwarf_debug_section *, void **) ATTRIBUTE_HIDDEN;
 579
 580 /* Find the nearest line using DWARF 2 debugging information, with
 581    the option of specifying a .gnu_debugaltlink file.  */
 582 extern int _bfd_dwarf2_find_nearest_line_with_alt
 583   (bfd *, const char *, asymbol **, asymbol *, asection *, bfd_vma,
 584    const char **, const char **, unsigned int *, unsigned int *,
 585    const struct dwarf_debug_section *, void **) ATTRIBUTE_HIDDEN;
 586
 587 /* Find the bias between DWARF addresses and real addresses.  */
 588 extern bfd_signed_vma _bfd_dwarf2_find_symbol_bias
 589   (asymbol **, void **) ATTRIBUTE_HIDDEN;
 590
 591 /* Find inliner info after calling bfd_find_nearest_line. */
 592 extern bool _bfd_dwarf2_find_inliner_info
 593   (bfd *, const char **, const char **, unsigned int *, void **)
 594   ATTRIBUTE_HIDDEN;
 595
 596 /* Read DWARF 2 debugging information. */
 597 extern bool _bfd_dwarf2_slurp_debug_info
 598   (bfd *, bfd *, const struct dwarf_debug_section *, asymbol **, void **,
 599    bool) ATTRIBUTE_HIDDEN;
 600
 601 /* Clean up the data used to handle DWARF 2 debugging information. */
 602 extern void _bfd_dwarf2_cleanup_debug_info
 603   (bfd *, void **) ATTRIBUTE_HIDDEN;
 604
 605 extern void _bfd_stab_cleanup
 606   (bfd *, void **) ATTRIBUTE_HIDDEN;
 607
 608 /* Create a new section entry.  */
 609 extern struct bfd_hash_entry *bfd_section_hash_newfunc
 610   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *)
 611   ATTRIBUTE_HIDDEN;
 612
 613 /* A routine to create entries for a bfd_link_hash_table.  */
 614 extern struct bfd_hash_entry *_bfd_link_hash_newfunc
 615   (struct bfd_hash_entry *entry, struct bfd_hash_table *table,
 616    const char *string) ATTRIBUTE_HIDDEN;
 617
 618 /* Initialize a bfd_link_hash_table.  */
 619 extern bool _bfd_link_hash_table_init
 620   (struct bfd_link_hash_table *, bfd *,
 621    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 622                                struct bfd_hash_table *,
 623                                const char *),
 624    unsigned int) ATTRIBUTE_HIDDEN;
 625
 626 /* Generic link hash table creation routine.  */
 627 extern struct bfd_link_hash_table *_bfd_generic_link_hash_table_create
 628   (bfd *) ATTRIBUTE_HIDDEN;
 629
 630 /* Generic link hash table destruction routine.  */
 631 extern void _bfd_generic_link_hash_table_free
 632   (bfd *) ATTRIBUTE_HIDDEN;
 633
 634 /* Generic add symbol routine.  */
 635 extern bool _bfd_generic_link_add_symbols
 636   (bfd *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 637
 638 /* Generic archive add symbol routine.  */
 639 extern bool _bfd_generic_link_add_archive_symbols
 640   (bfd *, struct bfd_link_info *,
 641    bool (*) (bfd *, struct bfd_link_info *,
 642                     struct bfd_link_hash_entry *, const char *,
 643                     bool *)) ATTRIBUTE_HIDDEN;
 644
 645 /* Forward declaration to avoid prototype errors.  */
 646 typedef struct bfd_link_hash_entry _bfd_link_hash_entry;
 647
 648 /* Generic routine to add a single symbol.  */
 649 extern bool _bfd_generic_link_add_one_symbol
 650   (struct bfd_link_info *, bfd *, const char *name, flagword,
 651    asection *, bfd_vma, const char *, bool copy,
 652    bool constructor, struct bfd_link_hash_entry **) ATTRIBUTE_HIDDEN;
 653
 654 /* Generic routine to mark section as supplying symbols only.  */
 655 extern void _bfd_generic_link_just_syms
 656   (asection *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 657
 658 /* Generic routine that does nothing.  */
 659 extern void _bfd_generic_copy_link_hash_symbol_type
 660   (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *)
 661   ATTRIBUTE_HIDDEN;
 662
 663 /* Generic link routine.  */
 664 extern bool _bfd_generic_final_link
 665   (bfd *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 666
 667 extern bool _bfd_generic_link_split_section
 668   (bfd *, struct bfd_section *) ATTRIBUTE_HIDDEN;
 669
 670 extern bool _bfd_generic_section_already_linked
 671   (bfd *, asection *, struct bfd_link_info *) ATTRIBUTE_HIDDEN;
 672
 673 /* Generic reloc_link_order processing routine.  */
 674 extern bool _bfd_generic_reloc_link_order
 675   (bfd *, struct bfd_link_info *, asection *, struct bfd_link_order *)
 676   ATTRIBUTE_HIDDEN;
 677
 678 /* Default link order processing routine.  */
 679 extern bool _bfd_default_link_order
 680   (bfd *, struct bfd_link_info *, asection *, struct bfd_link_order *)
 681   ATTRIBUTE_HIDDEN;
 682
 683 /* Count the number of reloc entries in a link order list.  */
 684 extern unsigned int _bfd_count_link_order_relocs
 685   (struct bfd_link_order *) ATTRIBUTE_HIDDEN;
 686
 687 /* Final link relocation routine.  */
 688 extern bfd_reloc_status_type _bfd_final_link_relocate
 689   (reloc_howto_type *, bfd *, asection *, bfd_byte *,
 690    bfd_vma, bfd_vma, bfd_vma) ATTRIBUTE_HIDDEN;
 691
 692 /* Relocate a particular location by a howto and a value.  */
 693 extern bfd_reloc_status_type _bfd_relocate_contents
 694   (reloc_howto_type *, bfd *, bfd_vma, bfd_byte *) ATTRIBUTE_HIDDEN;
 695
 696 /* Clear a given location using a given howto.  */
 697 extern bfd_reloc_status_type _bfd_clear_contents
 698   (reloc_howto_type *, bfd *, asection *, bfd_byte *, bfd_vma) ATTRIBUTE_HIDDEN;
 699
 700 /* Register a SEC_MERGE section as a candidate for merging.  */
 701
 702 extern bool _bfd_add_merge_section
 703   (bfd *, void **, asection *, void **) ATTRIBUTE_HIDDEN;
 704
 705 /* Attempt to merge SEC_MERGE sections.  */
 706
 707 extern bool _bfd_merge_sections
 708   (bfd *, struct bfd_link_info *, void *, void (*) (bfd *, asection *))
 709   ATTRIBUTE_HIDDEN;
 710
 711 /* Write out a merged section.  */
 712
 713 extern bool _bfd_write_merged_section
 714   (bfd *, asection *, void *) ATTRIBUTE_HIDDEN;
 715
 716 /* Find an offset within a modified SEC_MERGE section.  */
 717
 718 extern bfd_vma _bfd_merged_section_offset
 719   (bfd *, asection **, void *, bfd_vma) ATTRIBUTE_HIDDEN;
 720
 721 /* Tidy up when done.  */
 722
 723 extern void _bfd_merge_sections_free (void *) ATTRIBUTE_HIDDEN;
 724
 725 /* Macros to tell if bfds are read or write enabled.
 726
 727    Note that bfds open for read may be scribbled into if the fd passed
 728    to bfd_fdopenr is actually open both for read and write
 729    simultaneously.  However an output bfd will never be open for
 730    read.  Therefore sometimes you want to check bfd_read_p or
 731    !bfd_read_p, and only sometimes bfd_write_p.
 732 */
 733
 734 #define bfd_read_p(abfd) \
 735   ((abfd)->direction == read_direction || (abfd)->direction == both_direction)
 736 #define bfd_write_p(abfd) \
 737   ((abfd)->direction == write_direction || (abfd)->direction == both_direction)
 738
 739 extern void bfd_assert
 740   (const char*,int) ATTRIBUTE_HIDDEN;
 741
 742 #define BFD_ASSERT(x) \
 743   do { if (!(x)) bfd_assert(__FILE__,__LINE__); } while (0)
 744
 745 #define BFD_FAIL() \
 746   do { bfd_assert(__FILE__,__LINE__); } while (0)
 747
 748 extern void _bfd_abort
 749   (const char *, int, const char *) ATTRIBUTE_NORETURN ATTRIBUTE_HIDDEN;
 750
 751 /* if gcc >= 2.6, we can give a function name, too */
 752 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 753 #define __PRETTY_FUNCTION__  ((char *) NULL)
 754 #endif
 755
 756 #undef abort
 757 #define abort() _bfd_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 758
 759 /* Manipulate a system FILE but using BFD's "file_ptr", rather than
 760    the system "off_t" or "off64_t", as the offset.  */
 761 extern file_ptr _bfd_real_ftell
 762   (FILE *) ATTRIBUTE_HIDDEN;
 763 extern int _bfd_real_fseek
 764   (FILE *, file_ptr, int) ATTRIBUTE_HIDDEN;
 765 extern FILE *_bfd_real_fopen
 766   (const char *, const char *) ATTRIBUTE_HIDDEN;
 767
 768 /* List of supported target vectors, and the default vector (if
 769    bfd_default_vector[0] is NULL, there is no default).  */
 770 extern const bfd_target *const *const bfd_target_vector ATTRIBUTE_HIDDEN;
 771 extern const bfd_target *bfd_default_vector[] ATTRIBUTE_HIDDEN;
 772
 773 /* List of associated target vectors.  */
 774 extern const bfd_target *const *const bfd_associated_vector ATTRIBUTE_HIDDEN;
 775
 776 /* Functions shared by the ECOFF and MIPS ELF backends, which have no
 777    other common header files.  */
 778
 779 struct ecoff_debug_info;
 780 struct ecoff_debug_swap;
 781 struct ecoff_extr;
 782 struct ecoff_find_line;
 783
 784 extern void _bfd_ecoff_free_ecoff_debug_info
 785   (struct ecoff_debug_info *debug);
 786 extern bool _bfd_ecoff_locate_line
 787   (bfd *, asection *, bfd_vma, struct ecoff_debug_info * const,
 788    const struct ecoff_debug_swap * const, struct ecoff_find_line *,
 789    const char **, const char **, unsigned int *) ATTRIBUTE_HIDDEN;
 790 extern bool _bfd_ecoff_get_accumulated_pdr
 791   (void *, bfd_byte *) ATTRIBUTE_HIDDEN;
 792 extern bool _bfd_ecoff_get_accumulated_sym
 793   (void *, bfd_byte *) ATTRIBUTE_HIDDEN;
 794 extern bool _bfd_ecoff_get_accumulated_ss
 795   (void *, bfd_byte *) ATTRIBUTE_HIDDEN;
 796
 797 extern bfd_vma _bfd_get_gp_value
 798   (bfd *) ATTRIBUTE_HIDDEN;
 799 extern void _bfd_set_gp_value
 800   (bfd *, bfd_vma) ATTRIBUTE_HIDDEN;
 801
 802 /* Function shared by the COFF and ELF SH backends, which have no
 803    other common header files.  */
 804
 805 #ifndef _bfd_sh_align_load_span
 806 extern bool _bfd_sh_align_load_span
 807   (bfd *, asection *, bfd_byte *,
 808    bool (*) (bfd *, asection *, void *, bfd_byte *, bfd_vma),
 809    void *, bfd_vma **, bfd_vma *, bfd_vma, bfd_vma, bool *) ATTRIBUTE_HIDDEN;
 810 #endif
 811
 812 /* This is the shape of the elements inside the already_linked hash
 813    table. It maps a name onto a list of already_linked elements with
 814    the same name.  */
 815
 816 struct bfd_section_already_linked_hash_entry
 817 {
 818   struct bfd_hash_entry root;
 819   struct bfd_section_already_linked *entry;
 820 };
 821
 822 struct bfd_section_already_linked
 823 {
 824   struct bfd_section_already_linked *next;
 825   asection *sec;
 826 };
 827
 828 extern struct bfd_section_already_linked_hash_entry *
 829   bfd_section_already_linked_table_lookup (const char *) ATTRIBUTE_HIDDEN;
 830 extern bool bfd_section_already_linked_table_insert
 831   (struct bfd_section_already_linked_hash_entry *, asection *)
 832   ATTRIBUTE_HIDDEN;
 833 extern void bfd_section_already_linked_table_traverse
 834   (bool (*) (struct bfd_section_already_linked_hash_entry *,
 835                     void *), void *) ATTRIBUTE_HIDDEN;
 836
 837 extern bfd_vma _bfd_read_unsigned_leb128
 838   (bfd *, bfd_byte *, unsigned int *) ATTRIBUTE_HIDDEN;
 839 extern bfd_signed_vma _bfd_read_signed_leb128
 840   (bfd *, bfd_byte *, unsigned int *) ATTRIBUTE_HIDDEN;
 841 extern bfd_vma _bfd_safe_read_leb128
 842   (bfd *, bfd_byte **, bool, const bfd_byte * const) ATTRIBUTE_HIDDEN;
 843 extern bfd_byte * _bfd_write_unsigned_leb128
 844   (bfd_byte *, bfd_byte *, bfd_vma) ATTRIBUTE_HIDDEN;
 845
 846 extern struct bfd_link_info *_bfd_get_link_info (bfd *)
 847   ATTRIBUTE_HIDDEN;
 848
 849 #ifdef HAVE_MMAP
 850 extern uintptr_t _bfd_pagesize ATTRIBUTE_HIDDEN;
 851 extern uintptr_t _bfd_pagesize_m1 ATTRIBUTE_HIDDEN;
 852 extern uintptr_t _bfd_minimum_mmap_size ATTRIBUTE_HIDDEN;
 853 #endif
 854
 855 #if GCC_VERSION >= 7000
 856 #define _bfd_mul_overflow(a, b, res) __builtin_mul_overflow (a, b, res)
 857 #else
 858 /* Assumes unsigned values.  Careful!  Args evaluated multiple times.  */
 859 #define _bfd_mul_overflow(a, b, res) \
 860   ((*res) = (a), (*res) *= (b), (b) != 0 && (*res) / (b) != (a))
 861 #endif
 862
 863 #ifdef __GNUC__
 864 #define _bfd_constant_p(v) __builtin_constant_p (v)
 865 #else
 866 #define _bfd_constant_p(v) 0
 867 #endif
 868
 869 static inline void *
 870 _bfd_alloc_and_read (bfd *abfd, bfd_size_type asize, bfd_size_type rsize)
 871 {
 872   void *mem;
 873   if (!_bfd_constant_p (rsize))
 874     {
 875       ufile_ptr filesize = bfd_get_file_size (abfd);
 876       if (filesize != 0 && rsize > filesize)
 877         {
 878           bfd_set_error (bfd_error_file_truncated);
 879           return NULL;
 880         }
 881     }
 882   mem = bfd_alloc (abfd, asize);
 883   if (mem != NULL)
 884     {
 885       if (bfd_read (mem, rsize, abfd) == rsize)
 886         return mem;
 887       bfd_release (abfd, mem);
 888     }
 889   return NULL;
 890 }
 891
 892 #ifdef USE_MMAP
 893 extern void *_bfd_mmap_readonly_persistent
 894   (bfd *, size_t) ATTRIBUTE_HIDDEN;
 895 extern void *_bfd_mmap_readonly_temporary
 896   (bfd *, size_t, void **, size_t *) ATTRIBUTE_HIDDEN;
 897 extern void _bfd_munmap_readonly_temporary
 898   (void *, size_t) ATTRIBUTE_HIDDEN;
 899 #else
 900 #define _bfd_mmap_readonly_persistent(abfd, rsize) \
 901   _bfd_alloc_and_read (abfd, rsize, rsize)
 902 #define _bfd_munmap_readonly_temporary(ptr, rsize) free (ptr)
 903 #endif
 904
 905 extern bool _bfd_mmap_read_temporary
 906   (void **, size_t *, void **, bfd *, bool) ATTRIBUTE_HIDDEN;
 907
 908 static inline void *
 909 _bfd_malloc_and_read (bfd *abfd, bfd_size_type asize, bfd_size_type rsize)
 910 {
 911   void *mem;
 912   if (!_bfd_constant_p (rsize))
 913     {
 914       ufile_ptr filesize = bfd_get_file_size (abfd);
 915       if (filesize != 0 && rsize > filesize)
 916         {
 917           bfd_set_error (bfd_error_file_truncated);
 918           return NULL;
 919         }
 920     }
 921   mem = bfd_malloc (asize);
 922   if (mem != NULL)
 923     {
 924       if (bfd_read (mem, rsize, abfd) == rsize)
 925         return mem;
 926       free (mem);
 927     }
 928   return NULL;
 929 }
 930
 931 #ifndef USE_MMAP
 932 static inline void *
 933 _bfd_mmap_readonly_temporary (bfd *abfd, size_t rsize, void **map_addr,
 934                               size_t *map_size)
 935 {
 936   void *mem = _bfd_malloc_and_read (abfd, rsize, rsize);
 937   *map_addr = mem;
 938   *map_size = rsize;
 939   return mem;
 940 }
 941 #endif