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 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   5    1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   6    Free Software Foundation, Inc.
   7
   8    Written by Cygnus Support.
   9
  10 This file is part of BFD, the Binary File Descriptor library.
  11
  12 This program is free software; you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation; either version 2 of the License, or
  15 (at your option) any later version.
  16
  17 This program is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with this program; if not, write to the Free Software
  24 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  25
  26 #include "hashtab.h"
  27
  28 /* Align an address upward to a boundary, expressed as a number of bytes.
  29    E.g. align to an 8-byte boundary with argument of 8.  Take care never
  30    to wrap around if the address is within boundary-1 of the end of the
  31    address space.  */
  32 #define BFD_ALIGN(this, boundary)                                         \
  33   ((((bfd_vma) (this) + (boundary) - 1) >= (bfd_vma) (this))              \
  34    ? (((bfd_vma) (this) + ((boundary) - 1)) & ~ (bfd_vma) ((boundary)-1)) \
  35    : ~ (bfd_vma) 0)
  36
  37 /* If you want to read and write large blocks, you might want to do it
  38    in quanta of this amount */
  39 #define DEFAULT_BUFFERSIZE 8192
  40
  41 /* Set a tdata field.  Can't use the other macros for this, since they
  42    do casts, and casting to the left of assignment isn't portable.  */
  43 #define set_tdata(bfd, v) ((bfd)->tdata.any = (v))
  44
  45 /* If BFD_IN_MEMORY is set for a BFD, then the iostream fields points
  46    to an instance of this structure.  */
  47
  48 struct bfd_in_memory
  49 {
  50   /* Size of buffer.  */
  51   bfd_size_type size;
  52   /* Buffer holding contents of BFD.  */
  53   bfd_byte *buffer;
  54 };
  55
  56 struct section_hash_entry
  57 {
  58   struct bfd_hash_entry root;
  59   asection section;
  60 };
  61
  62 /* tdata for an archive.  For an input archive, cache
  63    needs to be free()'d.  For an output archive, symdefs do.  */
  64
  65 struct artdata {
  66   file_ptr first_file_filepos;
  67   /* Speed up searching the armap */
  68   htab_t cache;
  69   bfd *archive_head;            /* Only interesting in output routines */
  70   carsym *symdefs;              /* the symdef entries */
  71   symindex symdef_count;        /* how many there are */
  72   char *extended_names;         /* clever intel extension */
  73   bfd_size_type extended_names_size; /* Size of extended names */
  74   /* when more compilers are standard C, this can be a time_t */
  75   long  armap_timestamp;        /* Timestamp value written into armap.
  76                                    This is used for BSD archives to check
  77                                    that the timestamp is recent enough
  78                                    for the BSD linker to not complain,
  79                                    just before we finish writing an
  80                                    archive.  */
  81   file_ptr armap_datepos;       /* Position within archive to seek to
  82                                    rewrite the date field.  */
  83   void *tdata;                  /* Backend specific information.  */
  84 };
  85
  86 #define bfd_ardata(bfd) ((bfd)->tdata.aout_ar_data)
  87
  88 /* Goes in bfd's arelt_data slot */
  89 struct areltdata {
  90   char * arch_header;           /* it's actually a string */
  91   unsigned int parsed_size;     /* octets of filesize not including ar_hdr */
  92   char *filename;               /* null-terminated */
  93 };
  94
  95 #define arelt_size(bfd) (((struct areltdata *)((bfd)->arelt_data))->parsed_size)
  96
  97 extern void *bfd_malloc
  98   (bfd_size_type);
  99 extern void *bfd_realloc
 100   (void *, bfd_size_type);
 101 extern void *bfd_zmalloc
 102   (bfd_size_type);
 103 extern void *bfd_malloc2
 104   (bfd_size_type, bfd_size_type);
 105 extern void *bfd_realloc2
 106   (void *, bfd_size_type, bfd_size_type);
 107 extern void *bfd_zmalloc2
 108   (bfd_size_type, bfd_size_type);
 109
 110 extern void _bfd_default_error_handler (const char *s, ...);
 111 extern bfd_error_handler_type _bfd_error_handler;
 112
 113 /* These routines allocate and free things on the BFD's objalloc.  */
 114
 115 extern void *bfd_alloc
 116   (bfd *, bfd_size_type);
 117 extern void *bfd_zalloc
 118   (bfd *, bfd_size_type);
 119 extern void *bfd_alloc2
 120   (bfd *, bfd_size_type, bfd_size_type);
 121 extern void *bfd_zalloc2
 122   (bfd *, bfd_size_type, bfd_size_type);
 123 extern void bfd_release
 124   (bfd *, void *);
 125
 126 bfd * _bfd_create_empty_archive_element_shell
 127   (bfd *obfd);
 128 bfd * _bfd_look_for_bfd_in_cache
 129   (bfd *, file_ptr);
 130 bfd_boolean _bfd_add_bfd_to_archive_cache
 131   (bfd *, file_ptr, bfd *);
 132 bfd_boolean _bfd_generic_mkarchive
 133   (bfd *abfd);
 134 const bfd_target *bfd_generic_archive_p
 135   (bfd *abfd);
 136 bfd_boolean bfd_slurp_armap
 137   (bfd *abfd);
 138 bfd_boolean bfd_slurp_bsd_armap_f2
 139   (bfd *abfd);
 140 #define bfd_slurp_bsd_armap bfd_slurp_armap
 141 #define bfd_slurp_coff_armap bfd_slurp_armap
 142 bfd_boolean _bfd_slurp_extended_name_table
 143   (bfd *abfd);
 144 extern bfd_boolean _bfd_construct_extended_name_table
 145   (bfd *, bfd_boolean, char **, bfd_size_type *);
 146 bfd_boolean _bfd_write_archive_contents
 147   (bfd *abfd);
 148 bfd_boolean _bfd_compute_and_write_armap
 149   (bfd *, unsigned int elength);
 150 bfd *_bfd_get_elt_at_filepos
 151   (bfd *archive, file_ptr filepos);
 152 extern bfd *_bfd_generic_get_elt_at_index
 153   (bfd *, symindex);
 154 bfd * _bfd_new_bfd
 155   (void);
 156 void _bfd_delete_bfd
 157   (bfd *);
 158 bfd_boolean _bfd_free_cached_info
 159   (bfd *);
 160
 161 bfd_boolean bfd_false
 162   (bfd *ignore);
 163 bfd_boolean bfd_true
 164   (bfd *ignore);
 165 void *bfd_nullvoidptr
 166   (bfd *ignore);
 167 int bfd_0
 168   (bfd *ignore);
 169 unsigned int bfd_0u
 170   (bfd *ignore);
 171 long bfd_0l
 172   (bfd *ignore);
 173 long _bfd_n1
 174   (bfd *ignore);
 175 void bfd_void
 176   (bfd *ignore);
 177
 178 bfd *_bfd_new_bfd_contained_in
 179   (bfd *);
 180 const bfd_target *_bfd_dummy_target
 181   (bfd *abfd);
 182
 183 void bfd_dont_truncate_arname
 184   (bfd *abfd, const char *filename, char *hdr);
 185 void bfd_bsd_truncate_arname
 186   (bfd *abfd, const char *filename, char *hdr);
 187 void bfd_gnu_truncate_arname
 188   (bfd *abfd, const char *filename, char *hdr);
 189
 190 bfd_boolean bsd_write_armap
 191   (bfd *arch, unsigned int elength, struct orl *map, unsigned int orl_count,
 192    int stridx);
 193
 194 bfd_boolean coff_write_armap
 195   (bfd *arch, unsigned int elength, struct orl *map, unsigned int orl_count,
 196    int stridx);
 197
 198 extern void *_bfd_generic_read_ar_hdr
 199   (bfd *);
 200 extern void _bfd_ar_spacepad
 201   (char *, size_t, const char *, long);
 202
 203 extern void *_bfd_generic_read_ar_hdr_mag
 204   (bfd *, const char *);
 205
 206 bfd * bfd_generic_openr_next_archived_file
 207   (bfd *archive, bfd *last_file);
 208
 209 int bfd_generic_stat_arch_elt
 210   (bfd *, struct stat *);
 211
 212 #define _bfd_read_ar_hdr(abfd) \
 213   BFD_SEND (abfd, _bfd_read_ar_hdr_fn, (abfd))
 214 \f
 215 /* Generic routines to use for BFD_JUMP_TABLE_GENERIC.  Use
 216    BFD_JUMP_TABLE_GENERIC (_bfd_generic).  */
 217
 218 #define _bfd_generic_close_and_cleanup bfd_true
 219 #define _bfd_generic_bfd_free_cached_info bfd_true
 220 extern bfd_boolean _bfd_generic_new_section_hook
 221   (bfd *, asection *);
 222 extern bfd_boolean _bfd_generic_get_section_contents
 223   (bfd *, asection *, void *, file_ptr, bfd_size_type);
 224 extern bfd_boolean _bfd_generic_get_section_contents_in_window
 225   (bfd *, asection *, bfd_window *, file_ptr, bfd_size_type);
 226
 227 /* Generic routines to use for BFD_JUMP_TABLE_COPY.  Use
 228    BFD_JUMP_TABLE_COPY (_bfd_generic).  */
 229
 230 #define _bfd_generic_bfd_copy_private_bfd_data \
 231   ((bfd_boolean (*) (bfd *, bfd *)) bfd_true)
 232 #define _bfd_generic_bfd_merge_private_bfd_data \
 233   ((bfd_boolean (*) (bfd *, bfd *)) bfd_true)
 234 #define _bfd_generic_bfd_set_private_flags \
 235   ((bfd_boolean (*) (bfd *, flagword)) bfd_true)
 236 #define _bfd_generic_bfd_copy_private_section_data \
 237   ((bfd_boolean (*) (bfd *, asection *, bfd *, asection *)) bfd_true)
 238 #define _bfd_generic_bfd_copy_private_symbol_data \
 239   ((bfd_boolean (*) (bfd *, asymbol *, bfd *, asymbol *)) bfd_true)
 240 #define _bfd_generic_bfd_copy_private_header_data \
 241   ((bfd_boolean (*) (bfd *, bfd *)) bfd_true)
 242 #define _bfd_generic_bfd_print_private_bfd_data \
 243   ((bfd_boolean (*) (bfd *, void *)) bfd_true)
 244
 245 extern bfd_boolean _bfd_generic_init_private_section_data
 246   (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
 247
 248 /* Routines to use for BFD_JUMP_TABLE_CORE when there is no core file
 249    support.  Use BFD_JUMP_TABLE_CORE (_bfd_nocore).  */
 250
 251 extern char *_bfd_nocore_core_file_failing_command
 252   (bfd *);
 253 extern int _bfd_nocore_core_file_failing_signal
 254   (bfd *);
 255 extern bfd_boolean _bfd_nocore_core_file_matches_executable_p
 256   (bfd *, bfd *);
 257
 258 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE when there is no archive
 259    file support.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive).  */
 260
 261 #define _bfd_noarchive_slurp_armap bfd_false
 262 #define _bfd_noarchive_slurp_extended_name_table bfd_false
 263 #define _bfd_noarchive_construct_extended_name_table \
 264   ((bfd_boolean (*) (bfd *, char **, bfd_size_type *, const char **)) \
 265    bfd_false)
 266 #define _bfd_noarchive_truncate_arname \
 267   ((void (*) (bfd *, const char *, char *)) bfd_void)
 268 #define _bfd_noarchive_write_armap \
 269   ((bfd_boolean (*) (bfd *, unsigned int, struct orl *, unsigned int, int)) \
 270    bfd_false)
 271 #define _bfd_noarchive_read_ar_hdr bfd_nullvoidptr
 272 #define _bfd_noarchive_openr_next_archived_file \
 273   ((bfd *(*) (bfd *, bfd *)) bfd_nullvoidptr)
 274 #define _bfd_noarchive_get_elt_at_index \
 275   ((bfd *(*) (bfd *, symindex)) bfd_nullvoidptr)
 276 #define _bfd_noarchive_generic_stat_arch_elt bfd_generic_stat_arch_elt
 277 #define _bfd_noarchive_update_armap_timestamp bfd_false
 278
 279 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE to get BSD style
 280    archives.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd).  */
 281
 282 #define _bfd_archive_bsd_slurp_armap bfd_slurp_bsd_armap
 283 #define _bfd_archive_bsd_slurp_extended_name_table \
 284   _bfd_slurp_extended_name_table
 285 extern bfd_boolean _bfd_archive_bsd_construct_extended_name_table
 286   (bfd *, char **, bfd_size_type *, const char **);
 287 #define _bfd_archive_bsd_truncate_arname bfd_bsd_truncate_arname
 288 #define _bfd_archive_bsd_write_armap bsd_write_armap
 289 #define _bfd_archive_bsd_read_ar_hdr _bfd_generic_read_ar_hdr
 290 #define _bfd_archive_bsd_openr_next_archived_file \
 291   bfd_generic_openr_next_archived_file
 292 #define _bfd_archive_bsd_get_elt_at_index _bfd_generic_get_elt_at_index
 293 #define _bfd_archive_bsd_generic_stat_arch_elt \
 294   bfd_generic_stat_arch_elt
 295 extern bfd_boolean _bfd_archive_bsd_update_armap_timestamp
 296   (bfd *);
 297
 298 /* Routines to use for BFD_JUMP_TABLE_ARCHIVE to get COFF style
 299    archives.  Use BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff).  */
 300
 301 #define _bfd_archive_coff_slurp_armap bfd_slurp_coff_armap
 302 #define _bfd_archive_coff_slurp_extended_name_table \
 303   _bfd_slurp_extended_name_table
 304 extern bfd_boolean _bfd_archive_coff_construct_extended_name_table
 305   (bfd *, char **, bfd_size_type *, const char **);
 306 #define _bfd_archive_coff_truncate_arname bfd_dont_truncate_arname
 307 #define _bfd_archive_coff_write_armap coff_write_armap
 308 #define _bfd_archive_coff_read_ar_hdr _bfd_generic_read_ar_hdr
 309 #define _bfd_archive_coff_openr_next_archived_file \
 310   bfd_generic_openr_next_archived_file
 311 #define _bfd_archive_coff_get_elt_at_index _bfd_generic_get_elt_at_index
 312 #define _bfd_archive_coff_generic_stat_arch_elt \
 313   bfd_generic_stat_arch_elt
 314 #define _bfd_archive_coff_update_armap_timestamp bfd_true
 315
 316 /* Routines to use for BFD_JUMP_TABLE_SYMBOLS where there is no symbol
 317    support.  Use BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols).  */
 318
 319 #define _bfd_nosymbols_get_symtab_upper_bound _bfd_n1
 320 #define _bfd_nosymbols_canonicalize_symtab \
 321   ((long (*) (bfd *, asymbol **)) _bfd_n1)
 322 #define _bfd_nosymbols_make_empty_symbol _bfd_generic_make_empty_symbol
 323 #define _bfd_nosymbols_print_symbol \
 324   ((void (*) (bfd *, void *, asymbol *, bfd_print_symbol_type)) bfd_void)
 325 #define _bfd_nosymbols_get_symbol_info \
 326   ((void (*) (bfd *, asymbol *, symbol_info *)) bfd_void)
 327 #define _bfd_nosymbols_bfd_is_local_label_name \
 328   ((bfd_boolean (*) (bfd *, const char *)) bfd_false)
 329 #define _bfd_nosymbols_bfd_is_target_special_symbol \
 330   ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
 331 #define _bfd_nosymbols_get_lineno \
 332   ((alent *(*) (bfd *, asymbol *)) bfd_nullvoidptr)
 333 #define _bfd_nosymbols_find_nearest_line \
 334   ((bfd_boolean (*) (bfd *, asection *, asymbol **, bfd_vma, const char **, \
 335                      const char **, unsigned int *)) \
 336    bfd_false)
 337 #define _bfd_nosymbols_find_inliner_info \
 338   ((bfd_boolean (*) (bfd *, const char **, const char **, unsigned int *)) \
 339    bfd_false)
 340 #define _bfd_nosymbols_bfd_make_debug_symbol \
 341   ((asymbol *(*) (bfd *, void *, unsigned long)) bfd_nullvoidptr)
 342 #define _bfd_nosymbols_read_minisymbols \
 343   ((long (*) (bfd *, bfd_boolean, void **, unsigned int *)) _bfd_n1)
 344 #define _bfd_nosymbols_minisymbol_to_symbol \
 345   ((asymbol *(*) (bfd *, bfd_boolean, const void *, asymbol *)) \
 346    bfd_nullvoidptr)
 347
 348 /* Routines to use for BFD_JUMP_TABLE_RELOCS when there is no reloc
 349    support.  Use BFD_JUMP_TABLE_RELOCS (_bfd_norelocs).  */
 350
 351 extern long _bfd_norelocs_get_reloc_upper_bound (bfd *, asection *);
 352 extern long _bfd_norelocs_canonicalize_reloc (bfd *, asection *,
 353                                               arelent **, asymbol **);
 354 #define _bfd_norelocs_bfd_reloc_type_lookup \
 355   ((reloc_howto_type *(*) (bfd *, bfd_reloc_code_real_type)) bfd_nullvoidptr)
 356
 357 /* Routines to use for BFD_JUMP_TABLE_WRITE for targets which may not
 358    be written.  Use BFD_JUMP_TABLE_WRITE (_bfd_nowrite).  */
 359
 360 #define _bfd_nowrite_set_arch_mach \
 361   ((bfd_boolean (*) (bfd *, enum bfd_architecture, unsigned long)) \
 362    bfd_false)
 363 #define _bfd_nowrite_set_section_contents \
 364   ((bfd_boolean (*) (bfd *, asection *, const void *, file_ptr, bfd_size_type)) \
 365    bfd_false)
 366
 367 /* Generic routines to use for BFD_JUMP_TABLE_WRITE.  Use
 368    BFD_JUMP_TABLE_WRITE (_bfd_generic).  */
 369
 370 #define _bfd_generic_set_arch_mach bfd_default_set_arch_mach
 371 extern bfd_boolean _bfd_generic_set_section_contents
 372   (bfd *, asection *, const void *, file_ptr, bfd_size_type);
 373
 374 /* Routines to use for BFD_JUMP_TABLE_LINK for targets which do not
 375    support linking.  Use BFD_JUMP_TABLE_LINK (_bfd_nolink).  */
 376
 377 #define _bfd_nolink_sizeof_headers \
 378   ((int (*) (bfd *, struct bfd_link_info *)) bfd_0)
 379 #define _bfd_nolink_bfd_get_relocated_section_contents \
 380   ((bfd_byte *(*) (bfd *, struct bfd_link_info *, struct bfd_link_order *, \
 381                    bfd_byte *, bfd_boolean, asymbol **)) \
 382    bfd_nullvoidptr)
 383 #define _bfd_nolink_bfd_relax_section \
 384   ((bfd_boolean (*) \
 385     (bfd *, asection *, struct bfd_link_info *, bfd_boolean *)) \
 386    bfd_false)
 387 #define _bfd_nolink_bfd_gc_sections \
 388   ((bfd_boolean (*) (bfd *, struct bfd_link_info *)) \
 389    bfd_false)
 390 #define _bfd_nolink_bfd_merge_sections \
 391   ((bfd_boolean (*) (bfd *, struct bfd_link_info *)) \
 392    bfd_false)
 393 #define _bfd_nolink_bfd_is_group_section \
 394   ((bfd_boolean (*) (bfd *, const struct bfd_section *)) \
 395    bfd_false)
 396 #define _bfd_nolink_bfd_discard_group \
 397   ((bfd_boolean (*) (bfd *, struct bfd_section *)) \
 398    bfd_false)
 399 #define _bfd_nolink_bfd_link_hash_table_create \
 400   ((struct bfd_link_hash_table *(*) (bfd *)) bfd_nullvoidptr)
 401 #define _bfd_nolink_bfd_link_hash_table_free \
 402   ((void (*) (struct bfd_link_hash_table *)) bfd_void)
 403 #define _bfd_nolink_bfd_link_add_symbols \
 404   ((bfd_boolean (*) (bfd *, struct bfd_link_info *)) bfd_false)
 405 #define _bfd_nolink_bfd_link_just_syms \
 406   ((void (*) (asection *, struct bfd_link_info *)) bfd_void)
 407 #define _bfd_nolink_bfd_final_link \
 408   ((bfd_boolean (*) (bfd *, struct bfd_link_info *)) bfd_false)
 409 #define _bfd_nolink_bfd_link_split_section \
 410   ((bfd_boolean (*) (bfd *, struct bfd_section *)) bfd_false)
 411 #define _bfd_nolink_section_already_linked \
 412   ((void (*) (bfd *, struct bfd_section *, struct bfd_link_info *)) bfd_void)
 413
 414 /* Routines to use for BFD_JUMP_TABLE_DYNAMIC for targets which do not
 415    have dynamic symbols or relocs.  Use BFD_JUMP_TABLE_DYNAMIC
 416    (_bfd_nodynamic).  */
 417
 418 #define _bfd_nodynamic_get_dynamic_symtab_upper_bound _bfd_n1
 419 #define _bfd_nodynamic_canonicalize_dynamic_symtab \
 420   ((long (*) (bfd *, asymbol **)) _bfd_n1)
 421 #define _bfd_nodynamic_get_synthetic_symtab \
 422   ((long (*) (bfd *, long, asymbol **, long, asymbol **, asymbol **)) _bfd_n1)
 423 #define _bfd_nodynamic_get_dynamic_reloc_upper_bound _bfd_n1
 424 #define _bfd_nodynamic_canonicalize_dynamic_reloc \
 425   ((long (*) (bfd *, arelent **, asymbol **)) _bfd_n1)
 426 \f
 427 /* Generic routine to determine of the given symbol is a local
 428    label.  */
 429 extern bfd_boolean bfd_generic_is_local_label_name
 430   (bfd *, const char *);
 431
 432 /* Generic minisymbol routines.  */
 433 extern long _bfd_generic_read_minisymbols
 434   (bfd *, bfd_boolean, void **, unsigned int *);
 435 extern asymbol *_bfd_generic_minisymbol_to_symbol
 436   (bfd *, bfd_boolean, const void *, asymbol *);
 437
 438 /* Find the nearest line using .stab/.stabstr sections.  */
 439 extern bfd_boolean _bfd_stab_section_find_nearest_line
 440   (bfd *, asymbol **, asection *, bfd_vma, bfd_boolean *,
 441    const char **, const char **, unsigned int *, void **);
 442
 443 /* Find the nearest line using DWARF 1 debugging information.  */
 444 extern bfd_boolean _bfd_dwarf1_find_nearest_line
 445   (bfd *, asection *, asymbol **, bfd_vma, const char **,
 446    const char **, unsigned int *);
 447
 448 /* Find the nearest line using DWARF 2 debugging information.  */
 449 extern bfd_boolean _bfd_dwarf2_find_nearest_line
 450   (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
 451    unsigned int *, unsigned int, void **);
 452
 453 /* Find the line using DWARF 2 debugging information.  */
 454 extern bfd_boolean _bfd_dwarf2_find_line
 455   (bfd *, asymbol **, asymbol *, const char **,
 456    unsigned int *, unsigned int, void **);
 457
 458 bfd_boolean _bfd_generic_find_line
 459   (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
 460
 461 /* Find inliner info after calling bfd_find_nearest_line. */
 462 extern bfd_boolean _bfd_dwarf2_find_inliner_info
 463   (bfd *, const char **, const char **, unsigned int *, void **);
 464
 465 /* Create a new section entry.  */
 466 extern struct bfd_hash_entry *bfd_section_hash_newfunc
 467   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 468
 469 /* A routine to create entries for a bfd_link_hash_table.  */
 470 extern struct bfd_hash_entry *_bfd_link_hash_newfunc
 471   (struct bfd_hash_entry *entry, struct bfd_hash_table *table,
 472    const char *string);
 473
 474 /* Initialize a bfd_link_hash_table.  */
 475 extern bfd_boolean _bfd_link_hash_table_init
 476   (struct bfd_link_hash_table *, bfd *,
 477    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 478                                struct bfd_hash_table *,
 479                                const char *),
 480    unsigned int);
 481
 482 /* Generic link hash table creation routine.  */
 483 extern struct bfd_link_hash_table *_bfd_generic_link_hash_table_create
 484   (bfd *);
 485
 486 /* Generic link hash table destruction routine.  */
 487 extern void _bfd_generic_link_hash_table_free
 488   (struct bfd_link_hash_table *);
 489
 490 /* Generic add symbol routine.  */
 491 extern bfd_boolean _bfd_generic_link_add_symbols
 492   (bfd *, struct bfd_link_info *);
 493
 494 /* Generic add symbol routine.  This version is used by targets for
 495    which the linker must collect constructors and destructors by name,
 496    as the collect2 program does.  */
 497 extern bfd_boolean _bfd_generic_link_add_symbols_collect
 498   (bfd *, struct bfd_link_info *);
 499
 500 /* Generic archive add symbol routine.  */
 501 extern bfd_boolean _bfd_generic_link_add_archive_symbols
 502   (bfd *, struct bfd_link_info *,
 503    bfd_boolean (*) (bfd *, struct bfd_link_info *, bfd_boolean *));
 504
 505 /* Forward declaration to avoid prototype errors.  */
 506 typedef struct bfd_link_hash_entry _bfd_link_hash_entry;
 507
 508 /* Generic routine to add a single symbol.  */
 509 extern bfd_boolean _bfd_generic_link_add_one_symbol
 510   (struct bfd_link_info *, bfd *, const char *name, flagword,
 511    asection *, bfd_vma, const char *, bfd_boolean copy,
 512    bfd_boolean constructor, struct bfd_link_hash_entry **);
 513
 514 /* Generic routine to mark section as supplying symbols only.  */
 515 extern void _bfd_generic_link_just_syms
 516   (asection *, struct bfd_link_info *);
 517
 518 /* Generic link routine.  */
 519 extern bfd_boolean _bfd_generic_final_link
 520   (bfd *, struct bfd_link_info *);
 521
 522 extern bfd_boolean _bfd_generic_link_split_section
 523   (bfd *, struct bfd_section *);
 524
 525 extern void _bfd_generic_section_already_linked
 526   (bfd *, struct bfd_section *, struct bfd_link_info *);
 527
 528 /* Generic reloc_link_order processing routine.  */
 529 extern bfd_boolean _bfd_generic_reloc_link_order
 530   (bfd *, struct bfd_link_info *, asection *, struct bfd_link_order *);
 531
 532 /* Default link order processing routine.  */
 533 extern bfd_boolean _bfd_default_link_order
 534   (bfd *, struct bfd_link_info *, asection *, struct bfd_link_order *);
 535
 536 /* Count the number of reloc entries in a link order list.  */
 537 extern unsigned int _bfd_count_link_order_relocs
 538   (struct bfd_link_order *);
 539
 540 /* Final link relocation routine.  */
 541 extern bfd_reloc_status_type _bfd_final_link_relocate
 542   (reloc_howto_type *, bfd *, asection *, bfd_byte *,
 543    bfd_vma, bfd_vma, bfd_vma);
 544
 545 /* Relocate a particular location by a howto and a value.  */
 546 extern bfd_reloc_status_type _bfd_relocate_contents
 547   (reloc_howto_type *, bfd *, bfd_vma, bfd_byte *);
 548
 549 /* Clear a given location using a given howto.  */
 550 extern void _bfd_clear_contents (reloc_howto_type *howto, bfd *input_bfd,
 551                                  bfd_byte *location);
 552
 553 /* Link stabs in sections in the first pass.  */
 554
 555 extern bfd_boolean _bfd_link_section_stabs
 556   (bfd *, struct stab_info *, asection *, asection *, void **,
 557    bfd_size_type *);
 558
 559 /* Eliminate stabs for discarded functions and symbols.  */
 560 extern bfd_boolean _bfd_discard_section_stabs
 561   (bfd *, asection *, void *, bfd_boolean (*) (bfd_vma, void *), void *);
 562
 563 /* Write out the .stab section when linking stabs in sections.  */
 564
 565 extern bfd_boolean _bfd_write_section_stabs
 566   (bfd *, struct stab_info *, asection *, void **, bfd_byte *);
 567
 568 /* Write out the .stabstr string table when linking stabs in sections.  */
 569
 570 extern bfd_boolean _bfd_write_stab_strings
 571   (bfd *, struct stab_info *);
 572
 573 /* Find an offset within a .stab section when linking stabs in
 574    sections.  */
 575
 576 extern bfd_vma _bfd_stab_section_offset
 577   (asection *, void *, bfd_vma);
 578
 579 /* Register a SEC_MERGE section as a candidate for merging.  */
 580
 581 extern bfd_boolean _bfd_add_merge_section
 582   (bfd *, void **, asection *, void **);
 583
 584 /* Attempt to merge SEC_MERGE sections.  */
 585
 586 extern bfd_boolean _bfd_merge_sections
 587   (bfd *, struct bfd_link_info *, void *, void (*) (bfd *, asection *));
 588
 589 /* Write out a merged section.  */
 590
 591 extern bfd_boolean _bfd_write_merged_section
 592   (bfd *, asection *, void *);
 593
 594 /* Find an offset within a modified SEC_MERGE section.  */
 595
 596 extern bfd_vma _bfd_merged_section_offset
 597   (bfd *, asection **, void *, bfd_vma);
 598
 599 /* Create a string table.  */
 600 extern struct bfd_strtab_hash *_bfd_stringtab_init
 601   (void);
 602
 603 /* Create an XCOFF .debug section style string table.  */
 604 extern struct bfd_strtab_hash *_bfd_xcoff_stringtab_init
 605   (void);
 606
 607 /* Free a string table.  */
 608 extern void _bfd_stringtab_free
 609   (struct bfd_strtab_hash *);
 610
 611 /* Get the size of a string table.  */
 612 extern bfd_size_type _bfd_stringtab_size
 613   (struct bfd_strtab_hash *);
 614
 615 /* Add a string to a string table.  */
 616 extern bfd_size_type _bfd_stringtab_add
 617   (struct bfd_strtab_hash *, const char *, bfd_boolean hash, bfd_boolean copy);
 618
 619 /* Write out a string table.  */
 620 extern bfd_boolean _bfd_stringtab_emit
 621   (bfd *, struct bfd_strtab_hash *);
 622
 623 /* Check that endianness of input and output file match.  */
 624 extern bfd_boolean _bfd_generic_verify_endian_match
 625   (bfd *, bfd *);
 626 \f
 627 /* Macros to tell if bfds are read or write enabled.
 628
 629    Note that bfds open for read may be scribbled into if the fd passed
 630    to bfd_fdopenr is actually open both for read and write
 631    simultaneously.  However an output bfd will never be open for
 632    read.  Therefore sometimes you want to check bfd_read_p or
 633    !bfd_read_p, and only sometimes bfd_write_p.
 634 */
 635
 636 #define bfd_read_p(abfd) \
 637   ((abfd)->direction == read_direction || (abfd)->direction == both_direction)
 638 #define bfd_write_p(abfd) \
 639   ((abfd)->direction == write_direction || (abfd)->direction == both_direction)
 640
 641 void bfd_assert
 642   (const char*,int);
 643
 644 #define BFD_ASSERT(x) \
 645   do { if (!(x)) bfd_assert(__FILE__,__LINE__); } while (0)
 646
 647 #define BFD_FAIL() \
 648   do { bfd_assert(__FILE__,__LINE__); } while (0)
 649
 650 extern void _bfd_abort
 651   (const char *, int, const char *) ATTRIBUTE_NORETURN;
 652
 653 /* if gcc >= 2.6, we can give a function name, too */
 654 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 655 #define __PRETTY_FUNCTION__  ((char *) NULL)
 656 #endif
 657
 658 #undef abort
 659 #define abort() _bfd_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 660
 661 /* Manipulate a system FILE but using BFD's "file_ptr", rather than
 662    the system "off_t" or "off64_t", as the offset.  */
 663 extern file_ptr real_ftell (FILE *file);
 664 extern int real_fseek (FILE *file, file_ptr offset, int whence);
 665 extern FILE *real_fopen (const char *filename, const char *modes);
 666
 667 /* List of supported target vectors, and the default vector (if
 668    bfd_default_vector[0] is NULL, there is no default).  */
 669 extern const bfd_target * const *bfd_target_vector;
 670 extern const bfd_target *bfd_default_vector[];
 671
 672 /* List of associated target vectors.  */
 673 extern const bfd_target * const *bfd_associated_vector;
 674
 675 /* Functions shared by the ECOFF and MIPS ELF backends, which have no
 676    other common header files.  */
 677
 678 #if defined(__STDC__) || defined(ALMOST_STDC)
 679 struct ecoff_find_line;
 680 #endif
 681
 682 extern bfd_boolean _bfd_ecoff_locate_line
 683   (bfd *, asection *, bfd_vma, struct ecoff_debug_info * const,
 684    const struct ecoff_debug_swap * const, struct ecoff_find_line *,
 685    const char **, const char **, unsigned int *);
 686 extern bfd_boolean _bfd_ecoff_get_accumulated_pdr
 687   (void *, bfd_byte *);
 688 extern bfd_boolean _bfd_ecoff_get_accumulated_sym
 689   (void *, bfd_byte *);
 690 extern bfd_boolean _bfd_ecoff_get_accumulated_ss
 691   (void *, bfd_byte *);
 692
 693 extern bfd_vma _bfd_get_gp_value
 694   (bfd *);
 695 extern void _bfd_set_gp_value
 696   (bfd *, bfd_vma);
 697
 698 /* Function shared by the COFF and ELF SH backends, which have no
 699    other common header files.  */
 700
 701 #ifndef _bfd_sh_align_load_span
 702 extern bfd_boolean _bfd_sh_align_load_span
 703   (bfd *, asection *, bfd_byte *,
 704    bfd_boolean (*) (bfd *, asection *, void *, bfd_byte *, bfd_vma),
 705    void *, bfd_vma **, bfd_vma *, bfd_vma, bfd_vma, bfd_boolean *);
 706 #endif
 707
 708 /* This is the shape of the elements inside the already_linked hash
 709    table. It maps a name onto a list of already_linked elements with
 710    the same name.  */
 711
 712 struct bfd_section_already_linked_hash_entry
 713 {
 714   struct bfd_hash_entry root;
 715   struct bfd_section_already_linked *entry;
 716 };
 717
 718 struct bfd_section_already_linked
 719 {
 720   struct bfd_section_already_linked *next;
 721   asection *sec;
 722 };
 723
 724 extern struct bfd_section_already_linked_hash_entry *
 725   bfd_section_already_linked_table_lookup (const char *);
 726 extern void bfd_section_already_linked_table_insert
 727   (struct bfd_section_already_linked_hash_entry *, asection *);
 728 extern void bfd_section_already_linked_table_traverse
 729   (bfd_boolean (*) (struct bfd_section_already_linked_hash_entry *,
 730                     void *), void *);
 731
 732 extern bfd_vma read_unsigned_leb128 (bfd *, bfd_byte *, unsigned int *);
 733 extern bfd_signed_vma read_signed_leb128 (bfd *, bfd_byte *, unsigned int *);
 734