bfd/libbfd.c

   1 /* Assorted BFD support routines, only used internally.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002, 2003
   4    Free Software Foundation, Inc.
   5    Written by Cygnus Support.
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libbfd.h"
  26
  27 #ifndef HAVE_GETPAGESIZE
  28 #define getpagesize() 2048
  29 #endif
  30
  31 /*
  32 SECTION
  33         Internal functions
  34
  35 DESCRIPTION
  36         These routines are used within BFD.
  37         They are not intended for export, but are documented here for
  38         completeness.
  39 */
  40
  41 /* A routine which is used in target vectors for unsupported
  42    operations.  */
  43
  44 bfd_boolean
  45 bfd_false (bfd *ignore ATTRIBUTE_UNUSED)
  46 {
  47   bfd_set_error (bfd_error_invalid_operation);
  48   return FALSE;
  49 }
  50
  51 /* A routine which is used in target vectors for supported operations
  52    which do not actually do anything.  */
  53
  54 bfd_boolean
  55 bfd_true (bfd *ignore ATTRIBUTE_UNUSED)
  56 {
  57   return TRUE;
  58 }
  59
  60 /* A routine which is used in target vectors for unsupported
  61    operations which return a pointer value.  */
  62
  63 void *
  64 bfd_nullvoidptr (bfd *ignore ATTRIBUTE_UNUSED)
  65 {
  66   bfd_set_error (bfd_error_invalid_operation);
  67   return NULL;
  68 }
  69
  70 int
  71 bfd_0 (bfd *ignore ATTRIBUTE_UNUSED)
  72 {
  73   return 0;
  74 }
  75
  76 unsigned int
  77 bfd_0u (bfd *ignore ATTRIBUTE_UNUSED)
  78 {
  79    return 0;
  80 }
  81
  82 long
  83 bfd_0l (bfd *ignore ATTRIBUTE_UNUSED)
  84 {
  85   return 0;
  86 }
  87
  88 /* A routine which is used in target vectors for unsupported
  89    operations which return -1 on error.  */
  90
  91 long
  92 _bfd_n1 (bfd *ignore_abfd ATTRIBUTE_UNUSED)
  93 {
  94   bfd_set_error (bfd_error_invalid_operation);
  95   return -1;
  96 }
  97
  98 void
  99 bfd_void (bfd *ignore ATTRIBUTE_UNUSED)
 100 {
 101 }
 102
 103 bfd_boolean
 104 _bfd_nocore_core_file_matches_executable_p
 105   (bfd *ignore_core_bfd ATTRIBUTE_UNUSED,
 106    bfd *ignore_exec_bfd ATTRIBUTE_UNUSED)
 107 {
 108   bfd_set_error (bfd_error_invalid_operation);
 109   return FALSE;
 110 }
 111
 112 /* Routine to handle core_file_failing_command entry point for targets
 113    without core file support.  */
 114
 115 char *
 116 _bfd_nocore_core_file_failing_command (bfd *ignore_abfd ATTRIBUTE_UNUSED)
 117 {
 118   bfd_set_error (bfd_error_invalid_operation);
 119   return NULL;
 120 }
 121
 122 /* Routine to handle core_file_failing_signal entry point for targets
 123    without core file support.  */
 124
 125 int
 126 _bfd_nocore_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED)
 127 {
 128   bfd_set_error (bfd_error_invalid_operation);
 129   return 0;
 130 }
 131
 132 const bfd_target *
 133 _bfd_dummy_target (bfd *ignore_abfd ATTRIBUTE_UNUSED)
 134 {
 135   bfd_set_error (bfd_error_wrong_format);
 136   return 0;
 137 }
 138 \f
 139 /* Allocate memory using malloc.  */
 140
 141 void *
 142 bfd_malloc (bfd_size_type size)
 143 {
 144   void *ptr;
 145
 146   if (size != (size_t) size)
 147     {
 148       bfd_set_error (bfd_error_no_memory);
 149       return NULL;
 150     }
 151
 152   ptr = malloc ((size_t) size);
 153   if (ptr == NULL && (size_t) size != 0)
 154     bfd_set_error (bfd_error_no_memory);
 155
 156   return ptr;
 157 }
 158
 159 /* Reallocate memory using realloc.  */
 160
 161 void *
 162 bfd_realloc (void *ptr, bfd_size_type size)
 163 {
 164   void *ret;
 165
 166   if (size != (size_t) size)
 167     {
 168       bfd_set_error (bfd_error_no_memory);
 169       return NULL;
 170     }
 171
 172   if (ptr == NULL)
 173     ret = malloc ((size_t) size);
 174   else
 175     ret = realloc (ptr, (size_t) size);
 176
 177   if (ret == NULL && (size_t) size != 0)
 178     bfd_set_error (bfd_error_no_memory);
 179
 180   return ret;
 181 }
 182
 183 /* Allocate memory using malloc and clear it.  */
 184
 185 void *
 186 bfd_zmalloc (bfd_size_type size)
 187 {
 188   void *ptr;
 189
 190   if (size != (size_t) size)
 191     {
 192       bfd_set_error (bfd_error_no_memory);
 193       return NULL;
 194     }
 195
 196   ptr = malloc ((size_t) size);
 197
 198   if ((size_t) size != 0)
 199     {
 200       if (ptr == NULL)
 201         bfd_set_error (bfd_error_no_memory);
 202       else
 203         memset (ptr, 0, (size_t) size);
 204     }
 205
 206   return ptr;
 207 }
 208 /*
 209 INTERNAL_FUNCTION
 210         bfd_write_bigendian_4byte_int
 211
 212 SYNOPSIS
 213         bfd_boolean bfd_write_bigendian_4byte_int (bfd *, unsigned int);
 214
 215 DESCRIPTION
 216         Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big
 217         endian order regardless of what else is going on.  This is useful in
 218         archives.
 219
 220 */
 221 bfd_boolean
 222 bfd_write_bigendian_4byte_int (bfd *abfd, unsigned int i)
 223 {
 224   bfd_byte buffer[4];
 225   bfd_putb32 ((bfd_vma) i, buffer);
 226   return bfd_bwrite (buffer, (bfd_size_type) 4, abfd) == 4;
 227 }
 228
 229 \f
 230 /** The do-it-yourself (byte) sex-change kit */
 231
 232 /* The middle letter e.g. get<b>short indicates Big or Little endian
 233    target machine.  It doesn't matter what the byte order of the host
 234    machine is; these routines work for either.  */
 235
 236 /* FIXME: Should these take a count argument?
 237    Answer (gnu@cygnus.com):  No, but perhaps they should be inline
 238                              functions in swap.h #ifdef __GNUC__.
 239                              Gprof them later and find out.  */
 240
 241 /*
 242 FUNCTION
 243         bfd_put_size
 244 FUNCTION
 245         bfd_get_size
 246
 247 DESCRIPTION
 248         These macros as used for reading and writing raw data in
 249         sections; each access (except for bytes) is vectored through
 250         the target format of the BFD and mangled accordingly. The
 251         mangling performs any necessary endian translations and
 252         removes alignment restrictions.  Note that types accepted and
 253         returned by these macros are identical so they can be swapped
 254         around in macros---for example, @file{libaout.h} defines <<GET_WORD>>
 255         to either <<bfd_get_32>> or <<bfd_get_64>>.
 256
 257         In the put routines, @var{val} must be a <<bfd_vma>>.  If we are on a
 258         system without prototypes, the caller is responsible for making
 259         sure that is true, with a cast if necessary.  We don't cast
 260         them in the macro definitions because that would prevent <<lint>>
 261         or <<gcc -Wall>> from detecting sins such as passing a pointer.
 262         To detect calling these with less than a <<bfd_vma>>, use
 263         <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s.
 264
 265 .
 266 .{* Byte swapping macros for user section data.  *}
 267 .
 268 .#define bfd_put_8(abfd, val, ptr) \
 269 .  ((void) (*((unsigned char *) (ptr)) = (unsigned char) (val)))
 270 .#define bfd_put_signed_8 \
 271 .  bfd_put_8
 272 .#define bfd_get_8(abfd, ptr) \
 273 .  (*(unsigned char *) (ptr) & 0xff)
 274 .#define bfd_get_signed_8(abfd, ptr) \
 275 .  (((*(unsigned char *) (ptr) & 0xff) ^ 0x80) - 0x80)
 276 .
 277 .#define bfd_put_16(abfd, val, ptr) \
 278 .  BFD_SEND (abfd, bfd_putx16, ((val),(ptr)))
 279 .#define bfd_put_signed_16 \
 280 .  bfd_put_16
 281 .#define bfd_get_16(abfd, ptr) \
 282 .  BFD_SEND (abfd, bfd_getx16, (ptr))
 283 .#define bfd_get_signed_16(abfd, ptr) \
 284 .  BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
 285 .
 286 .#define bfd_put_32(abfd, val, ptr) \
 287 .  BFD_SEND (abfd, bfd_putx32, ((val),(ptr)))
 288 .#define bfd_put_signed_32 \
 289 .  bfd_put_32
 290 .#define bfd_get_32(abfd, ptr) \
 291 .  BFD_SEND (abfd, bfd_getx32, (ptr))
 292 .#define bfd_get_signed_32(abfd, ptr) \
 293 .  BFD_SEND (abfd, bfd_getx_signed_32, (ptr))
 294 .
 295 .#define bfd_put_64(abfd, val, ptr) \
 296 .  BFD_SEND (abfd, bfd_putx64, ((val), (ptr)))
 297 .#define bfd_put_signed_64 \
 298 .  bfd_put_64
 299 .#define bfd_get_64(abfd, ptr) \
 300 .  BFD_SEND (abfd, bfd_getx64, (ptr))
 301 .#define bfd_get_signed_64(abfd, ptr) \
 302 .  BFD_SEND (abfd, bfd_getx_signed_64, (ptr))
 303 .
 304 .#define bfd_get(bits, abfd, ptr)                       \
 305 .  ((bits) == 8 ? (bfd_vma) bfd_get_8 (abfd, ptr)       \
 306 .   : (bits) == 16 ? bfd_get_16 (abfd, ptr)             \
 307 .   : (bits) == 32 ? bfd_get_32 (abfd, ptr)             \
 308 .   : (bits) == 64 ? bfd_get_64 (abfd, ptr)             \
 309 .   : (abort (), (bfd_vma) - 1))
 310 .
 311 .#define bfd_put(bits, abfd, val, ptr)                  \
 312 .  ((bits) == 8 ? bfd_put_8  (abfd, val, ptr)           \
 313 .   : (bits) == 16 ? bfd_put_16 (abfd, val, ptr)                \
 314 .   : (bits) == 32 ? bfd_put_32 (abfd, val, ptr)                \
 315 .   : (bits) == 64 ? bfd_put_64 (abfd, val, ptr)                \
 316 .   : (abort (), (void) 0))
 317 .
 318 */
 319
 320 /*
 321 FUNCTION
 322         bfd_h_put_size
 323         bfd_h_get_size
 324
 325 DESCRIPTION
 326         These macros have the same function as their <<bfd_get_x>>
 327         brethren, except that they are used for removing information
 328         for the header records of object files. Believe it or not,
 329         some object files keep their header records in big endian
 330         order and their data in little endian order.
 331 .
 332 .{* Byte swapping macros for file header data.  *}
 333 .
 334 .#define bfd_h_put_8(abfd, val, ptr) \
 335 .  bfd_put_8 (abfd, val, ptr)
 336 .#define bfd_h_put_signed_8(abfd, val, ptr) \
 337 .  bfd_put_8 (abfd, val, ptr)
 338 .#define bfd_h_get_8(abfd, ptr) \
 339 .  bfd_get_8 (abfd, ptr)
 340 .#define bfd_h_get_signed_8(abfd, ptr) \
 341 .  bfd_get_signed_8 (abfd, ptr)
 342 .
 343 .#define bfd_h_put_16(abfd, val, ptr) \
 344 .  BFD_SEND (abfd, bfd_h_putx16, (val, ptr))
 345 .#define bfd_h_put_signed_16 \
 346 .  bfd_h_put_16
 347 .#define bfd_h_get_16(abfd, ptr) \
 348 .  BFD_SEND (abfd, bfd_h_getx16, (ptr))
 349 .#define bfd_h_get_signed_16(abfd, ptr) \
 350 .  BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr))
 351 .
 352 .#define bfd_h_put_32(abfd, val, ptr) \
 353 .  BFD_SEND (abfd, bfd_h_putx32, (val, ptr))
 354 .#define bfd_h_put_signed_32 \
 355 .  bfd_h_put_32
 356 .#define bfd_h_get_32(abfd, ptr) \
 357 .  BFD_SEND (abfd, bfd_h_getx32, (ptr))
 358 .#define bfd_h_get_signed_32(abfd, ptr) \
 359 .  BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr))
 360 .
 361 .#define bfd_h_put_64(abfd, val, ptr) \
 362 .  BFD_SEND (abfd, bfd_h_putx64, (val, ptr))
 363 .#define bfd_h_put_signed_64 \
 364 .  bfd_h_put_64
 365 .#define bfd_h_get_64(abfd, ptr) \
 366 .  BFD_SEND (abfd, bfd_h_getx64, (ptr))
 367 .#define bfd_h_get_signed_64(abfd, ptr) \
 368 .  BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr))
 369 .
 370 .{* Refinements on the above, which should eventually go away.  Save
 371 .   cluttering the source with (bfd_vma) and (bfd_byte *) casts.  *}
 372 .
 373 .#define H_PUT_64(abfd, val, where) \
 374 .  bfd_h_put_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
 375 .
 376 .#define H_PUT_32(abfd, val, where) \
 377 .  bfd_h_put_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
 378 .
 379 .#define H_PUT_16(abfd, val, where) \
 380 .  bfd_h_put_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
 381 .
 382 .#define H_PUT_8 bfd_h_put_8
 383 .
 384 .#define H_PUT_S64(abfd, val, where) \
 385 .  bfd_h_put_signed_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
 386 .
 387 .#define H_PUT_S32(abfd, val, where) \
 388 .  bfd_h_put_signed_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
 389 .
 390 .#define H_PUT_S16(abfd, val, where) \
 391 .  bfd_h_put_signed_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
 392 .
 393 .#define H_PUT_S8 bfd_h_put_signed_8
 394 .
 395 .#define H_GET_64(abfd, where) \
 396 .  bfd_h_get_64 ((abfd), (bfd_byte *) (where))
 397 .
 398 .#define H_GET_32(abfd, where) \
 399 .  bfd_h_get_32 ((abfd), (bfd_byte *) (where))
 400 .
 401 .#define H_GET_16(abfd, where) \
 402 .  bfd_h_get_16 ((abfd), (bfd_byte *) (where))
 403 .
 404 .#define H_GET_8 bfd_h_get_8
 405 .
 406 .#define H_GET_S64(abfd, where) \
 407 .  bfd_h_get_signed_64 ((abfd), (bfd_byte *) (where))
 408 .
 409 .#define H_GET_S32(abfd, where) \
 410 .  bfd_h_get_signed_32 ((abfd), (bfd_byte *) (where))
 411 .
 412 .#define H_GET_S16(abfd, where) \
 413 .  bfd_h_get_signed_16 ((abfd), (bfd_byte *) (where))
 414 .
 415 .#define H_GET_S8 bfd_h_get_signed_8
 416 .
 417 .*/
 418
 419 /* Sign extension to bfd_signed_vma.  */
 420 #define COERCE16(x) (((bfd_signed_vma) (x) ^ 0x8000) - 0x8000)
 421 #define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000)
 422 #define EIGHT_GAZILLION ((BFD_HOST_64_BIT) 1 << 63)
 423 #define COERCE64(x) \
 424   (((bfd_signed_vma) (x) ^ EIGHT_GAZILLION) - EIGHT_GAZILLION)
 425
 426 bfd_vma
 427 bfd_getb16 (const bfd_byte *addr)
 428 {
 429   return (addr[0] << 8) | addr[1];
 430 }
 431
 432 bfd_vma
 433 bfd_getl16 (const bfd_byte *addr)
 434 {
 435   return (addr[1] << 8) | addr[0];
 436 }
 437
 438 bfd_signed_vma
 439 bfd_getb_signed_16 (const bfd_byte *addr)
 440 {
 441   return COERCE16 ((addr[0] << 8) | addr[1]);
 442 }
 443
 444 bfd_signed_vma
 445 bfd_getl_signed_16 (const bfd_byte *addr)
 446 {
 447   return COERCE16 ((addr[1] << 8) | addr[0]);
 448 }
 449
 450 void
 451 bfd_putb16 (bfd_vma data, bfd_byte *addr)
 452 {
 453   addr[0] = (bfd_byte) (data >> 8);
 454   addr[1] = (bfd_byte) data;
 455 }
 456
 457 void
 458 bfd_putl16 (bfd_vma data, bfd_byte *addr)
 459 {
 460   addr[0] = (bfd_byte) data;
 461   addr[1] = (bfd_byte) (data >> 8);
 462 }
 463
 464 bfd_vma
 465 bfd_getb32 (const bfd_byte *addr)
 466 {
 467   unsigned long v;
 468
 469   v = (unsigned long) addr[0] << 24;
 470   v |= (unsigned long) addr[1] << 16;
 471   v |= (unsigned long) addr[2] << 8;
 472   v |= (unsigned long) addr[3];
 473   return v;
 474 }
 475
 476 bfd_vma
 477 bfd_getl32 (const bfd_byte *addr)
 478 {
 479   unsigned long v;
 480
 481   v = (unsigned long) addr[0];
 482   v |= (unsigned long) addr[1] << 8;
 483   v |= (unsigned long) addr[2] << 16;
 484   v |= (unsigned long) addr[3] << 24;
 485   return v;
 486 }
 487
 488 bfd_signed_vma
 489 bfd_getb_signed_32 (const bfd_byte *addr)
 490 {
 491   unsigned long v;
 492
 493   v = (unsigned long) addr[0] << 24;
 494   v |= (unsigned long) addr[1] << 16;
 495   v |= (unsigned long) addr[2] << 8;
 496   v |= (unsigned long) addr[3];
 497   return COERCE32 (v);
 498 }
 499
 500 bfd_signed_vma
 501 bfd_getl_signed_32 (const bfd_byte *addr)
 502 {
 503   unsigned long v;
 504
 505   v = (unsigned long) addr[0];
 506   v |= (unsigned long) addr[1] << 8;
 507   v |= (unsigned long) addr[2] << 16;
 508   v |= (unsigned long) addr[3] << 24;
 509   return COERCE32 (v);
 510 }
 511
 512 bfd_vma
 513 bfd_getb64 (const bfd_byte *addr ATTRIBUTE_UNUSED)
 514 {
 515 #ifdef BFD64
 516   bfd_vma v;
 517
 518   v  = addr[0]; v <<= 8;
 519   v |= addr[1]; v <<= 8;
 520   v |= addr[2]; v <<= 8;
 521   v |= addr[3]; v <<= 8;
 522   v |= addr[4]; v <<= 8;
 523   v |= addr[5]; v <<= 8;
 524   v |= addr[6]; v <<= 8;
 525   v |= addr[7];
 526
 527   return v;
 528 #else
 529   BFD_FAIL();
 530   return 0;
 531 #endif
 532 }
 533
 534 bfd_vma
 535 bfd_getl64 (const bfd_byte *addr ATTRIBUTE_UNUSED)
 536 {
 537 #ifdef BFD64
 538   bfd_vma v;
 539
 540   v  = addr[7]; v <<= 8;
 541   v |= addr[6]; v <<= 8;
 542   v |= addr[5]; v <<= 8;
 543   v |= addr[4]; v <<= 8;
 544   v |= addr[3]; v <<= 8;
 545   v |= addr[2]; v <<= 8;
 546   v |= addr[1]; v <<= 8;
 547   v |= addr[0];
 548
 549   return v;
 550 #else
 551   BFD_FAIL();
 552   return 0;
 553 #endif
 554
 555 }
 556
 557 bfd_signed_vma
 558 bfd_getb_signed_64 (addr)
 559      register const bfd_byte *addr ATTRIBUTE_UNUSED;
 560 {
 561 #ifdef BFD64
 562   bfd_vma v;
 563
 564   v  = addr[0]; v <<= 8;
 565   v |= addr[1]; v <<= 8;
 566   v |= addr[2]; v <<= 8;
 567   v |= addr[3]; v <<= 8;
 568   v |= addr[4]; v <<= 8;
 569   v |= addr[5]; v <<= 8;
 570   v |= addr[6]; v <<= 8;
 571   v |= addr[7];
 572
 573   return COERCE64 (v);
 574 #else
 575   BFD_FAIL();
 576   return 0;
 577 #endif
 578 }
 579
 580 bfd_signed_vma
 581 bfd_getl_signed_64 (addr)
 582      register const bfd_byte *addr ATTRIBUTE_UNUSED;
 583 {
 584 #ifdef BFD64
 585   bfd_vma v;
 586
 587   v  = addr[7]; v <<= 8;
 588   v |= addr[6]; v <<= 8;
 589   v |= addr[5]; v <<= 8;
 590   v |= addr[4]; v <<= 8;
 591   v |= addr[3]; v <<= 8;
 592   v |= addr[2]; v <<= 8;
 593   v |= addr[1]; v <<= 8;
 594   v |= addr[0];
 595
 596   return COERCE64 (v);
 597 #else
 598   BFD_FAIL();
 599   return 0;
 600 #endif
 601 }
 602
 603 void
 604 bfd_putb32 (bfd_vma data, bfd_byte *addr)
 605 {
 606   addr[0] = (bfd_byte) (data >> 24);
 607   addr[1] = (bfd_byte) (data >> 16);
 608   addr[2] = (bfd_byte) (data >>  8);
 609   addr[3] = (bfd_byte) data;
 610 }
 611
 612 void
 613 bfd_putl32 (bfd_vma data, bfd_byte *addr)
 614 {
 615   addr[0] = (bfd_byte) data;
 616   addr[1] = (bfd_byte) (data >>  8);
 617   addr[2] = (bfd_byte) (data >> 16);
 618   addr[3] = (bfd_byte) (data >> 24);
 619 }
 620
 621 void
 622 bfd_putb64 (bfd_vma data ATTRIBUTE_UNUSED, bfd_byte *addr ATTRIBUTE_UNUSED)
 623 {
 624 #ifdef BFD64
 625   addr[0] = (bfd_byte) (data >> (7*8));
 626   addr[1] = (bfd_byte) (data >> (6*8));
 627   addr[2] = (bfd_byte) (data >> (5*8));
 628   addr[3] = (bfd_byte) (data >> (4*8));
 629   addr[4] = (bfd_byte) (data >> (3*8));
 630   addr[5] = (bfd_byte) (data >> (2*8));
 631   addr[6] = (bfd_byte) (data >> (1*8));
 632   addr[7] = (bfd_byte) (data >> (0*8));
 633 #else
 634   BFD_FAIL();
 635 #endif
 636 }
 637
 638 void
 639 bfd_putl64 (bfd_vma data ATTRIBUTE_UNUSED, bfd_byte *addr ATTRIBUTE_UNUSED)
 640 {
 641 #ifdef BFD64
 642   addr[7] = (bfd_byte) (data >> (7*8));
 643   addr[6] = (bfd_byte) (data >> (6*8));
 644   addr[5] = (bfd_byte) (data >> (5*8));
 645   addr[4] = (bfd_byte) (data >> (4*8));
 646   addr[3] = (bfd_byte) (data >> (3*8));
 647   addr[2] = (bfd_byte) (data >> (2*8));
 648   addr[1] = (bfd_byte) (data >> (1*8));
 649   addr[0] = (bfd_byte) (data >> (0*8));
 650 #else
 651   BFD_FAIL();
 652 #endif
 653 }
 654
 655 void
 656 bfd_put_bits (bfd_vma data, bfd_byte *addr, int bits, bfd_boolean big_p)
 657 {
 658   int i;
 659   int bytes;
 660
 661   if (bits % 8 != 0)
 662     abort ();
 663
 664   bytes = bits / 8;
 665   for (i = 0; i < bytes; i++)
 666     {
 667       int index = big_p ? bytes - i - 1 : i;
 668
 669       addr[index] = (bfd_byte) data;
 670       data >>= 8;
 671     }
 672 }
 673
 674 bfd_vma
 675 bfd_get_bits (bfd_byte *addr, int bits, bfd_boolean big_p)
 676 {
 677   bfd_vma data;
 678   int i;
 679   int bytes;
 680
 681   if (bits % 8 != 0)
 682     abort ();
 683
 684   data = 0;
 685   bytes = bits / 8;
 686   for (i = 0; i < bytes; i++)
 687     {
 688       int index = big_p ? i : bytes - i - 1;
 689
 690       data = (data << 8) | addr[index];
 691     }
 692
 693   return data;
 694 }
 695 \f
 696 /* Default implementation */
 697
 698 bfd_boolean
 699 _bfd_generic_get_section_contents (bfd *abfd,
 700                                    sec_ptr section,
 701                                    void *location,
 702                                    file_ptr offset,
 703                                    bfd_size_type count)
 704 {
 705   if (count == 0)
 706     return TRUE;
 707
 708   if (offset + count > section->_raw_size)
 709     {
 710       bfd_set_error (bfd_error_invalid_operation);
 711       return FALSE;
 712     }
 713
 714   if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
 715       || bfd_bread (location, count, abfd) != count)
 716     return FALSE;
 717
 718   return TRUE;
 719 }
 720
 721 bfd_boolean
 722 _bfd_generic_get_section_contents_in_window
 723   (bfd *abfd ATTRIBUTE_UNUSED,
 724    sec_ptr section ATTRIBUTE_UNUSED,
 725    bfd_window *w ATTRIBUTE_UNUSED,
 726    file_ptr offset ATTRIBUTE_UNUSED,
 727    bfd_size_type count ATTRIBUTE_UNUSED)
 728 {
 729 #ifdef USE_MMAP
 730   if (count == 0)
 731     return TRUE;
 732   if (abfd->xvec->_bfd_get_section_contents
 733       != _bfd_generic_get_section_contents)
 734     {
 735       /* We don't know what changes the bfd's get_section_contents
 736          method may have to make.  So punt trying to map the file
 737          window, and let get_section_contents do its thing.  */
 738       /* @@ FIXME : If the internal window has a refcount of 1 and was
 739          allocated with malloc instead of mmap, just reuse it.  */
 740       bfd_free_window (w);
 741       w->i = bfd_zmalloc (sizeof (bfd_window_internal));
 742       if (w->i == NULL)
 743         return FALSE;
 744       w->i->data = bfd_malloc (count);
 745       if (w->i->data == NULL)
 746         {
 747           free (w->i);
 748           w->i = NULL;
 749           return FALSE;
 750         }
 751       w->i->mapped = 0;
 752       w->i->refcount = 1;
 753       w->size = w->i->size = count;
 754       w->data = w->i->data;
 755       return bfd_get_section_contents (abfd, section, w->data, offset, count);
 756     }
 757   if (offset + count > section->_raw_size
 758       || ! bfd_get_file_window (abfd, section->filepos + offset, count, w,
 759                                 TRUE))
 760     return FALSE;
 761   return TRUE;
 762 #else
 763   abort ();
 764 #endif
 765 }
 766
 767 /* This generic function can only be used in implementations where creating
 768    NEW sections is disallowed.  It is useful in patching existing sections
 769    in read-write files, though.  See other set_section_contents functions
 770    to see why it doesn't work for new sections.  */
 771 bfd_boolean
 772 _bfd_generic_set_section_contents (bfd *abfd,
 773                                    sec_ptr section,
 774                                    const void *location,
 775                                    file_ptr offset,
 776                                    bfd_size_type count)
 777 {
 778   if (count == 0)
 779     return TRUE;
 780
 781   if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
 782       || bfd_bwrite (location, count, abfd) != count)
 783     return FALSE;
 784
 785   return TRUE;
 786 }
 787
 788 /*
 789 INTERNAL_FUNCTION
 790         bfd_log2
 791
 792 SYNOPSIS
 793         unsigned int bfd_log2 (bfd_vma x);
 794
 795 DESCRIPTION
 796         Return the log base 2 of the value supplied, rounded up.  E.g., an
 797         @var{x} of 1025 returns 11.  A @var{x} of 0 returns 0.
 798 */
 799
 800 unsigned int
 801 bfd_log2 (bfd_vma x)
 802 {
 803   unsigned int result = 0;
 804
 805   while ((x = (x >> 1)) != 0)
 806     ++result;
 807   return result;
 808 }
 809
 810 bfd_boolean
 811 bfd_generic_is_local_label_name (bfd *abfd, const char *name)
 812 {
 813   char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.';
 814
 815   return name[0] == locals_prefix;
 816 }
 817
 818 /*  Can be used from / for bfd_merge_private_bfd_data to check that
 819     endianness matches between input and output file.  Returns
 820     TRUE for a match, otherwise returns FALSE and emits an error.  */
 821 bfd_boolean
 822 _bfd_generic_verify_endian_match (bfd *ibfd, bfd *obfd)
 823 {
 824   if (ibfd->xvec->byteorder != obfd->xvec->byteorder
 825       && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
 826       && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
 827     {
 828       const char *msg;
 829
 830       if (bfd_big_endian (ibfd))
 831         msg = _("%s: compiled for a big endian system and target is little endian");
 832       else
 833         msg = _("%s: compiled for a little endian system and target is big endian");
 834
 835       (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
 836
 837       bfd_set_error (bfd_error_wrong_format);
 838       return FALSE;
 839     }
 840
 841   return TRUE;
 842 }
 843
 844 /* Give a warning at runtime if someone compiles code which calls
 845    old routines.  */
 846
 847 void
 848 warn_deprecated (const char *what,
 849                  const char *file,
 850                  int line,
 851                  const char *func)
 852 {
 853   /* Poor man's tracking of functions we've already warned about.  */
 854   static size_t mask = 0;
 855
 856   if (~(size_t) func & ~mask)
 857     {
 858       /* Note: separate sentences in order to allow
 859          for translation into other languages.  */
 860       if (func)
 861         fprintf (stderr, _("Deprecated %s called at %s line %d in %s\n"),
 862                  what, file, line, func);
 863       else
 864         fprintf (stderr, _("Deprecated %s called\n"), what);
 865       mask |= ~(size_t) func;
 866     }
 867 }