bfd/libbfd.h

   1 /* libbfd.h -- Declarations used by bfd library *implementation*.
   2    (This include file is not for users of the library.)
   3    Copyright (C) 1990-1991 Free Software Foundation, Inc.
   4    Written by Cygnus Support.
   5
   6 This file is part of BFD, the Binary File Descriptor library.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 /* $Id$ */
  23
  24 /* If you want to read and write large blocks, you might want to do it
  25    in quanta of this amount */
  26 #define DEFAULT_BUFFERSIZE 8192
  27
  28 /* Set a tdata field.  Can't use the other macros for this, since they
  29    do casts, and casting to the left of assignment isn't portable.  */
  30 #define set_tdata(bfd, v) ((bfd)->tdata = (PTR) (v))
  31
  32 /* tdata for an archive.  For an input archive, cache
  33    needs to be free()'d.  For an output archive, symdefs do.  */
  34
  35 struct artdata {
  36   file_ptr first_file_filepos;
  37   /* Speed up searching the armap */
  38   struct ar_cache *cache;
  39   bfd *archive_head;            /* Only interesting in output routines */
  40   carsym *symdefs;              /* the symdef entries */
  41   symindex symdef_count;             /* how many there are */
  42   char *extended_names;         /* clever intel extension */
  43 };
  44
  45 #define bfd_ardata(bfd) ((struct artdata *) ((bfd)->tdata))
  46
  47 /* Goes in bfd's arelt_data slot */
  48 struct areltdata {
  49   char * arch_header;                        /* it's actually a string */
  50   unsigned int parsed_size;     /* octets of filesize not including ar_hdr */
  51   char *filename;                            /* null-terminated */
  52 };
  53
  54 #define arelt_size(bfd) (((struct areltdata *)((bfd)->arelt_data))->parsed_size)
  55
  56 /* FIXME -- a lot of my code allocates a large block and subdivides it.
  57    This can't always work, because of alignment restrictions.  We should change
  58    it before it becomes a problem -- Gumby */
  59
  60 PROTO (char *, zalloc, (bfd_size_type size));
  61
  62 /* These routines allocate and free things on the BFD's obstack.  Note
  63    that realloc can never occur in place.  */
  64
  65 PROTO(PTR, bfd_alloc, (bfd *abfd, bfd_size_type size));
  66 PROTO(PTR, bfd_zalloc,(bfd *abfd, bfd_size_type size));
  67 PROTO(PTR, bfd_realloc,(bfd *abfd, PTR orig, bfd_size_type new));
  68 PROTO(void, bfd_alloc_grow,(bfd *abfd, PTR thing, bfd_size_type size));
  69 PROTO(PTR, bfd_alloc_finish,(bfd *abfd));
  70
  71 #define bfd_release(x,y) (void) obstack_free(&(x->memory),y)
  72
  73
  74 PROTO (bfd_size_type, bfd_read, (PTR ptr, bfd_size_type size, bfd_size_type nitems, bfd *abfd));
  75 PROTO (bfd_size_type, bfd_write, (PTR ptr, bfd_size_type size, bfd_size_type nitems, bfd *abfd));
  76
  77
  78
  79 PROTO (int, bfd_seek,(bfd* abfd, file_ptr fp , int direction));
  80 PROTO (long, bfd_tell, (bfd *abfd));
  81 PROTO (bfd *, _bfd_create_empty_archive_element_shell, (bfd *obfd));
  82 PROTO (bfd *, look_for_bfd_in_cache, (bfd *arch_bfd, file_ptr index));
  83 PROTO (boolean, _bfd_generic_mkarchive, (bfd *abfd));
  84 PROTO (struct areltdata *, snarf_ar_hdr, (bfd *abfd));
  85 PROTO (bfd_target *, bfd_generic_archive_p, (bfd *abfd));
  86 PROTO (boolean, bfd_slurp_bsd_armap, (bfd *abfd));
  87 PROTO (boolean, bfd_slurp_coff_armap, (bfd *abfd));
  88 PROTO (boolean, _bfd_slurp_extended_name_table, (bfd *abfd));
  89 PROTO (boolean, _bfd_write_archive_contents, (bfd *abfd));
  90 PROTO (bfd *, new_bfd, ());
  91
  92 #define DEFAULT_STRING_SPACE_SIZE 0x2000
  93 PROTO (boolean, bfd_add_to_string_table, (char **table, char *new_string,
  94                                           unsigned int *table_length,
  95                                           char **free_ptr));
  96 PROTO (bfd_vma, _do_getb64, (unsigned char *addr));
  97 PROTO (bfd_vma, _do_getl64, (unsigned char *addr));
  98 PROTO (bfd_vma, _do_getb32, (unsigned char *addr));
  99 PROTO (bfd_vma, _do_getl32, (unsigned char *addr));
 100 PROTO (bfd_vma, _do_getb16, (unsigned char *addr));
 101 PROTO (bfd_vma, _do_getl16, (unsigned char *addr));
 102 PROTO (void, _do_putb64, (bfd_vma data, unsigned char *addr));
 103 PROTO (void, _do_putl64, (bfd_vma data, unsigned char *addr));
 104 PROTO (void, _do_putb32, (bfd_vma data, unsigned char *addr));
 105 PROTO (void, _do_putl32, (bfd_vma data, unsigned char *addr));
 106 PROTO (void, _do_putb16, (bfd_vma data, unsigned char *addr));
 107 PROTO (void, _do_putl16, (bfd_vma data, unsigned char *addr));
 108
 109 PROTO (boolean, bfd_false, (bfd *ignore));
 110 PROTO (boolean, bfd_true, (bfd *ignore));
 111 PROTO (PTR, bfd_nullvoidptr, (bfd *ignore));
 112 PROTO (int, bfd_0, (bfd *ignore));
 113 PROTO (unsigned int, bfd_0u, (bfd *ignore));
 114 PROTO (void, bfd_void, (bfd *ignore));
 115
 116 PROTO (bfd *,new_bfd_contained_in,(bfd *));
 117 PROTO (boolean, _bfd_dummy_new_section_hook, (bfd *ignore, asection *newsect));
 118 PROTO (char *, _bfd_dummy_core_file_failing_command, (bfd *abfd));
 119 PROTO (int, _bfd_dummy_core_file_failing_signal, (bfd *abfd));
 120 PROTO (boolean, _bfd_dummy_core_file_matches_executable_p, (bfd *core_bfd,
 121                                                             bfd *exec_bfd));
 122 PROTO (bfd_target *, _bfd_dummy_target, (bfd *abfd));
 123
 124 PROTO (void, bfd_dont_truncate_arname, (bfd *abfd, CONST char *filename,
 125                                         char *hdr));
 126 PROTO (void, bfd_bsd_truncate_arname, (bfd *abfd, CONST char *filename,
 127                                         char *hdr));
 128 PROTO (void, bfd_gnu_truncate_arname, (bfd *abfd, CONST char *filename,
 129                                         char *hdr));
 130
 131 PROTO (boolean, bsd_write_armap, (bfd *arch, unsigned int elength,
 132                                   struct orl *map, int orl_count, int stridx));
 133
 134 PROTO (boolean, coff_write_armap, (bfd *arch, unsigned int elength,
 135                                    struct orl *map, int orl_count, int stridx));
 136
 137 PROTO (bfd *, bfd_generic_openr_next_archived_file, (bfd *archive,
 138                                                      bfd *last_file));
 139
 140 PROTO(int, bfd_generic_stat_arch_elt, (bfd *, struct stat *));
 141
 142 PROTO(boolean, bfd_generic_get_section_contents,
 143       (bfd *abfd, sec_ptr section, PTR location, file_ptr offset, bfd_size_type count));
 144
 145 /* Macros to tell if bfds are read or write enabled.
 146
 147    Note that bfds open for read may be scribbled into if the fd passed
 148    to bfd_fdopenr is actually open both for read and write
 149    simultaneously.  However an output bfd will never be open for
 150    read.  Therefore sometimes you want to check bfd_read_p or
 151    !bfd_read_p, and only sometimes bfd_write_p.
 152 */
 153
 154 #define bfd_read_p(abfd) ((abfd)->direction == read_direction || (abfd)->direction == both_direction)
 155 #define bfd_write_p(abfd) ((abfd)->direction == write_direction || (abfd)->direction == both_direction)
 156
 157 PROTO (void, bfd_assert,(char*,int));
 158 #define BFD_ASSERT(x) \
 159 { if (!(x)) bfd_assert(__FILE__,__LINE__); }
 160
 161 #define BFD_FAIL() \
 162 { bfd_assert(__FILE__,__LINE__); }
 163
 164 PROTO (FILE *, bfd_cache_lookup_worker, (bfd *));
 165
 166 extern bfd *bfd_last_cache;
 167
 168 /* Now Steve, what's the story here? */
 169 #ifdef lint
 170 #define itos(x) "l"
 171 #define stoi(x) 1
 172 #else
 173 #define itos(x) ((char*)(x))
 174 #define stoi(x) ((int)(x))
 175 #endif
 176
 177 /* Generic routine for close_and_cleanup is really just bfd_true.  */
 178 #define bfd_generic_close_and_cleanup   bfd_true
 179
 180 /* THE FOLLOWING IS EXTRACTED FROM THE SOURCE*/
 181
 182 /* FROM libbfd.c*/
 183 /* ------------------------------START FROM libbfd.c
 184
 185 *i bfd_log2
 186 Return the log base 2 of the value supplied, rounded up. eg an arg
 187 of 1025 would return 11.
 188 */
 189  PROTO(bfd_vma, bfd_log2,(bfd_vma x));
 190
 191 /*
 192
 193  --------------------------------END FROM libbfd.c*/
 194
 195 /* FROM cache.c*/
 196 /* ------------------------------START FROM cache.c
 197  BFD_CACHE_MAX_OPEN
 198 The maxiumum number of files which the cache will keep open at one
 199 time.
 200 */
 201 #define BFD_CACHE_MAX_OPEN 10
 202
 203 /*
 204
 205   bfd_last_cache
 206 Zero, or a pointer to the topmost BFD on the chain.  This is used by
 207 the @code{bfd_cache_lookup} macro in @file{libbfd.h} to determine when
 208 it can avoid a function call.
 209 */
 210 extern bfd *bfd_last_cache;
 211
 212 /*
 213
 214   bfd_cache_lookup
 215 Checks to see if the required BFD is the same as the last one looked
 216 up. If so then it can use the iostream in the BFD with impunity, since
 217 it can't have changed since the last lookup, otherwise it has to
 218 perform the complicated lookup function
 219 */
 220 #define bfd_cache_lookup(x) \
 221      ((x)==bfd_last_cache? \
 222         (FILE*)(bfd_last_cache->iostream): \
 223          bfd_cache_lookup_worker(x))
 224
 225 /*
 226
 227 *i bfd_cache_init
 228 Initialize a BFD by putting it on the cache LRU.
 229 */
 230  PROTO(void, bfd_cache_init, (bfd *));
 231
 232 /*
 233
 234 *i bfd_cache_close
 235 Remove the BFD from the cache. If the attached file is open, then close it too.
 236 */
 237  PROTO(void, bfd_cache_close, (bfd *));
 238
 239 /*
 240
 241 *i bfd_open_file
 242 Call the OS to open a file for this BFD.  Returns the FILE *
 243 (possibly null) that results from this operation.  Sets up the
 244 BFD so that future accesses know the file is open. If the FILE *
 245 returned is null, then there is won't have been put in the cache, so
 246 it won't have to be removed from it.
 247 */
 248  PROTO(FILE *, bfd_open_file, (bfd *));
 249
 250 /*
 251
 252 *i bfd_cache_lookup_worker
 253 Called when the macro @code{bfd_cache_lookup} fails to find a quick
 254 answer. Finds a file descriptor for this BFD.  If necessary, it open it.
 255 If there are already more than BFD_CACHE_MAX_OPEN files open, it trys to close
 256 one first, to avoid running out of file descriptors.
 257 */
 258  PROTO(FILE *, bfd_cache_lookup_worker, (bfd *));
 259
 260 /*
 261
 262  --------------------------------END FROM cache.c*/
 263
 264 /* FROM reloc.c*/
 265