| 1 | /* Low-level I/O routines for BFDs. |
| 2 | |
| 3 | Copyright (C) 1990-2017 Free Software Foundation, Inc. |
| 4 | |
| 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| 22 | MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include <limits.h> |
| 26 | #include "bfd.h" |
| 27 | #include "libbfd.h" |
| 28 | |
| 29 | #ifndef S_IXUSR |
| 30 | #define S_IXUSR 0100 /* Execute by owner. */ |
| 31 | #endif |
| 32 | #ifndef S_IXGRP |
| 33 | #define S_IXGRP 0010 /* Execute by group. */ |
| 34 | #endif |
| 35 | #ifndef S_IXOTH |
| 36 | #define S_IXOTH 0001 /* Execute by others. */ |
| 37 | #endif |
| 38 | |
| 39 | #ifndef FD_CLOEXEC |
| 40 | #define FD_CLOEXEC 1 |
| 41 | #endif |
| 42 | |
| 43 | file_ptr |
| 44 | _bfd_real_ftell (FILE *file) |
| 45 | { |
| 46 | #if defined (HAVE_FTELLO64) |
| 47 | return ftello64 (file); |
| 48 | #elif defined (HAVE_FTELLO) |
| 49 | return ftello (file); |
| 50 | #else |
| 51 | return ftell (file); |
| 52 | #endif |
| 53 | } |
| 54 | |
| 55 | int |
| 56 | _bfd_real_fseek (FILE *file, file_ptr offset, int whence) |
| 57 | { |
| 58 | #if defined (HAVE_FSEEKO64) |
| 59 | return fseeko64 (file, offset, whence); |
| 60 | #elif defined (HAVE_FSEEKO) |
| 61 | return fseeko (file, offset, whence); |
| 62 | #else |
| 63 | return fseek (file, offset, whence); |
| 64 | #endif |
| 65 | } |
| 66 | |
| 67 | /* Mark FILE as close-on-exec. Return FILE. FILE may be NULL, in |
| 68 | which case nothing is done. */ |
| 69 | static FILE * |
| 70 | close_on_exec (FILE *file) |
| 71 | { |
| 72 | #if defined (HAVE_FILENO) && defined (F_GETFD) |
| 73 | if (file) |
| 74 | { |
| 75 | int fd = fileno (file); |
| 76 | int old = fcntl (fd, F_GETFD, 0); |
| 77 | if (old >= 0) |
| 78 | fcntl (fd, F_SETFD, old | FD_CLOEXEC); |
| 79 | } |
| 80 | #endif |
| 81 | return file; |
| 82 | } |
| 83 | |
| 84 | FILE * |
| 85 | _bfd_real_fopen (const char *filename, const char *modes) |
| 86 | { |
| 87 | #ifdef VMS |
| 88 | char *vms_attr; |
| 89 | |
| 90 | /* On VMS, fopen allows file attributes as optional arguments. |
| 91 | We need to use them but we'd better to use the common prototype. |
| 92 | In fopen-vms.h, they are separated from the mode with a comma. |
| 93 | Split here. */ |
| 94 | vms_attr = strchr (modes, ','); |
| 95 | if (vms_attr == NULL) |
| 96 | { |
| 97 | /* No attributes. */ |
| 98 | return close_on_exec (fopen (filename, modes)); |
| 99 | } |
| 100 | else |
| 101 | { |
| 102 | /* Attributes found. Split. */ |
| 103 | size_t modes_len = strlen (modes) + 1; |
| 104 | char attrs[modes_len + 1]; |
| 105 | char *at[3]; |
| 106 | int i; |
| 107 | |
| 108 | memcpy (attrs, modes, modes_len); |
| 109 | at[0] = attrs; |
| 110 | for (i = 0; i < 2; i++) |
| 111 | { |
| 112 | at[i + 1] = strchr (at[i], ','); |
| 113 | BFD_ASSERT (at[i + 1] != NULL); |
| 114 | *(at[i + 1]++) = 0; /* Replace ',' with a nul, and skip it. */ |
| 115 | } |
| 116 | return close_on_exec (fopen (filename, at[0], at[1], at[2])); |
| 117 | } |
| 118 | #else /* !VMS */ |
| 119 | #if defined (HAVE_FOPEN64) |
| 120 | return close_on_exec (fopen64 (filename, modes)); |
| 121 | #else |
| 122 | return close_on_exec (fopen (filename, modes)); |
| 123 | #endif |
| 124 | #endif /* !VMS */ |
| 125 | } |
| 126 | |
| 127 | /* |
| 128 | INTERNAL_DEFINITION |
| 129 | struct bfd_iovec |
| 130 | |
| 131 | DESCRIPTION |
| 132 | |
| 133 | The <<struct bfd_iovec>> contains the internal file I/O class. |
| 134 | Each <<BFD>> has an instance of this class and all file I/O is |
| 135 | routed through it (it is assumed that the instance implements |
| 136 | all methods listed below). |
| 137 | |
| 138 | .struct bfd_iovec |
| 139 | .{ |
| 140 | . {* To avoid problems with macros, a "b" rather than "f" |
| 141 | . prefix is prepended to each method name. *} |
| 142 | . {* Attempt to read/write NBYTES on ABFD's IOSTREAM storing/fetching |
| 143 | . bytes starting at PTR. Return the number of bytes actually |
| 144 | . transfered (a read past end-of-file returns less than NBYTES), |
| 145 | . or -1 (setting <<bfd_error>>) if an error occurs. *} |
| 146 | . file_ptr (*bread) (struct bfd *abfd, void *ptr, file_ptr nbytes); |
| 147 | . file_ptr (*bwrite) (struct bfd *abfd, const void *ptr, |
| 148 | . file_ptr nbytes); |
| 149 | . {* Return the current IOSTREAM file offset, or -1 (setting <<bfd_error>> |
| 150 | . if an error occurs. *} |
| 151 | . file_ptr (*btell) (struct bfd *abfd); |
| 152 | . {* For the following, on successful completion a value of 0 is returned. |
| 153 | . Otherwise, a value of -1 is returned (and <<bfd_error>> is set). *} |
| 154 | . int (*bseek) (struct bfd *abfd, file_ptr offset, int whence); |
| 155 | . int (*bclose) (struct bfd *abfd); |
| 156 | . int (*bflush) (struct bfd *abfd); |
| 157 | . int (*bstat) (struct bfd *abfd, struct stat *sb); |
| 158 | . {* Mmap a part of the files. ADDR, LEN, PROT, FLAGS and OFFSET are the usual |
| 159 | . mmap parameter, except that LEN and OFFSET do not need to be page |
| 160 | . aligned. Returns (void *)-1 on failure, mmapped address on success. |
| 161 | . Also write in MAP_ADDR the address of the page aligned buffer and in |
| 162 | . MAP_LEN the size mapped (a page multiple). Use unmap with MAP_ADDR and |
| 163 | . MAP_LEN to unmap. *} |
| 164 | . void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len, |
| 165 | . int prot, int flags, file_ptr offset, |
| 166 | . void **map_addr, bfd_size_type *map_len); |
| 167 | .}; |
| 168 | |
| 169 | .extern const struct bfd_iovec _bfd_memory_iovec; |
| 170 | |
| 171 | */ |
| 172 | |
| 173 | |
| 174 | /* Return value is amount read. */ |
| 175 | |
| 176 | bfd_size_type |
| 177 | bfd_bread (void *ptr, bfd_size_type size, bfd *abfd) |
| 178 | { |
| 179 | size_t nread; |
| 180 | |
| 181 | /* If this is an archive element, don't read past the end of |
| 182 | this element. */ |
| 183 | if (abfd->arelt_data != NULL) |
| 184 | { |
| 185 | bfd_size_type maxbytes = arelt_size (abfd); |
| 186 | |
| 187 | if (abfd->where + size > maxbytes) |
| 188 | { |
| 189 | if (abfd->where >= maxbytes) |
| 190 | return 0; |
| 191 | size = maxbytes - abfd->where; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | if (abfd->iovec) |
| 196 | nread = abfd->iovec->bread (abfd, ptr, size); |
| 197 | else |
| 198 | nread = 0; |
| 199 | if (nread != (size_t) -1) |
| 200 | abfd->where += nread; |
| 201 | |
| 202 | return nread; |
| 203 | } |
| 204 | |
| 205 | bfd_size_type |
| 206 | bfd_bwrite (const void *ptr, bfd_size_type size, bfd *abfd) |
| 207 | { |
| 208 | size_t nwrote; |
| 209 | |
| 210 | if (abfd->iovec) |
| 211 | nwrote = abfd->iovec->bwrite (abfd, ptr, size); |
| 212 | else |
| 213 | nwrote = 0; |
| 214 | |
| 215 | if (nwrote != (size_t) -1) |
| 216 | abfd->where += nwrote; |
| 217 | if (nwrote != size) |
| 218 | { |
| 219 | #ifdef ENOSPC |
| 220 | errno = ENOSPC; |
| 221 | #endif |
| 222 | bfd_set_error (bfd_error_system_call); |
| 223 | } |
| 224 | return nwrote; |
| 225 | } |
| 226 | |
| 227 | file_ptr |
| 228 | bfd_tell (bfd *abfd) |
| 229 | { |
| 230 | file_ptr ptr; |
| 231 | |
| 232 | if (abfd->iovec) |
| 233 | { |
| 234 | bfd *parent_bfd = abfd; |
| 235 | ptr = abfd->iovec->btell (abfd); |
| 236 | |
| 237 | while (parent_bfd->my_archive != NULL |
| 238 | && !bfd_is_thin_archive (parent_bfd->my_archive)) |
| 239 | { |
| 240 | ptr -= parent_bfd->origin; |
| 241 | parent_bfd = parent_bfd->my_archive; |
| 242 | } |
| 243 | } |
| 244 | else |
| 245 | ptr = 0; |
| 246 | |
| 247 | abfd->where = ptr; |
| 248 | return ptr; |
| 249 | } |
| 250 | |
| 251 | int |
| 252 | bfd_flush (bfd *abfd) |
| 253 | { |
| 254 | if (abfd->iovec) |
| 255 | return abfd->iovec->bflush (abfd); |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | /* Returns 0 for success, negative value for failure (in which case |
| 260 | bfd_get_error can retrieve the error code). */ |
| 261 | int |
| 262 | bfd_stat (bfd *abfd, struct stat *statbuf) |
| 263 | { |
| 264 | int result; |
| 265 | |
| 266 | if (abfd->iovec) |
| 267 | result = abfd->iovec->bstat (abfd, statbuf); |
| 268 | else |
| 269 | result = -1; |
| 270 | |
| 271 | if (result < 0) |
| 272 | bfd_set_error (bfd_error_system_call); |
| 273 | return result; |
| 274 | } |
| 275 | |
| 276 | /* Returns 0 for success, nonzero for failure (in which case bfd_get_error |
| 277 | can retrieve the error code). */ |
| 278 | |
| 279 | int |
| 280 | bfd_seek (bfd *abfd, file_ptr position, int direction) |
| 281 | { |
| 282 | int result; |
| 283 | file_ptr file_position; |
| 284 | /* For the time being, a BFD may not seek to it's end. The problem |
| 285 | is that we don't easily have a way to recognize the end of an |
| 286 | element in an archive. */ |
| 287 | |
| 288 | BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR); |
| 289 | |
| 290 | if (direction == SEEK_CUR && position == 0) |
| 291 | return 0; |
| 292 | |
| 293 | if (abfd->my_archive == NULL || bfd_is_thin_archive (abfd->my_archive)) |
| 294 | { |
| 295 | if (direction == SEEK_SET && (bfd_vma) position == abfd->where) |
| 296 | return 0; |
| 297 | } |
| 298 | else |
| 299 | { |
| 300 | /* We need something smarter to optimize access to archives. |
| 301 | Currently, anything inside an archive is read via the file |
| 302 | handle for the archive. Which means that a bfd_seek on one |
| 303 | component affects the `current position' in the archive, as |
| 304 | well as in any other component. |
| 305 | |
| 306 | It might be sufficient to put a spike through the cache |
| 307 | abstraction, and look to the archive for the file position, |
| 308 | but I think we should try for something cleaner. |
| 309 | |
| 310 | In the meantime, no optimization for archives. */ |
| 311 | } |
| 312 | |
| 313 | file_position = position; |
| 314 | if (direction == SEEK_SET) |
| 315 | { |
| 316 | bfd *parent_bfd = abfd; |
| 317 | |
| 318 | while (parent_bfd->my_archive != NULL |
| 319 | && !bfd_is_thin_archive (parent_bfd->my_archive)) |
| 320 | { |
| 321 | file_position += parent_bfd->origin; |
| 322 | parent_bfd = parent_bfd->my_archive; |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | if (abfd->iovec) |
| 327 | result = abfd->iovec->bseek (abfd, file_position, direction); |
| 328 | else |
| 329 | result = -1; |
| 330 | |
| 331 | if (result != 0) |
| 332 | { |
| 333 | int hold_errno = errno; |
| 334 | |
| 335 | /* Force redetermination of `where' field. */ |
| 336 | bfd_tell (abfd); |
| 337 | |
| 338 | /* An EINVAL error probably means that the file offset was |
| 339 | absurd. */ |
| 340 | if (hold_errno == EINVAL) |
| 341 | bfd_set_error (bfd_error_file_truncated); |
| 342 | else |
| 343 | { |
| 344 | bfd_set_error (bfd_error_system_call); |
| 345 | errno = hold_errno; |
| 346 | } |
| 347 | } |
| 348 | else |
| 349 | { |
| 350 | /* Adjust `where' field. */ |
| 351 | if (direction == SEEK_SET) |
| 352 | abfd->where = position; |
| 353 | else |
| 354 | abfd->where += position; |
| 355 | } |
| 356 | return result; |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | FUNCTION |
| 361 | bfd_get_mtime |
| 362 | |
| 363 | SYNOPSIS |
| 364 | long bfd_get_mtime (bfd *abfd); |
| 365 | |
| 366 | DESCRIPTION |
| 367 | Return the file modification time (as read from the file system, or |
| 368 | from the archive header for archive members). |
| 369 | |
| 370 | */ |
| 371 | |
| 372 | long |
| 373 | bfd_get_mtime (bfd *abfd) |
| 374 | { |
| 375 | struct stat buf; |
| 376 | |
| 377 | if (abfd->mtime_set) |
| 378 | return abfd->mtime; |
| 379 | |
| 380 | if (abfd->iovec == NULL) |
| 381 | return 0; |
| 382 | |
| 383 | if (abfd->iovec->bstat (abfd, &buf) != 0) |
| 384 | return 0; |
| 385 | |
| 386 | abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */ |
| 387 | return buf.st_mtime; |
| 388 | } |
| 389 | |
| 390 | /* |
| 391 | FUNCTION |
| 392 | bfd_get_size |
| 393 | |
| 394 | SYNOPSIS |
| 395 | ufile_ptr bfd_get_size (bfd *abfd); |
| 396 | |
| 397 | DESCRIPTION |
| 398 | Return the file size (as read from file system) for the file |
| 399 | associated with BFD @var{abfd}. |
| 400 | |
| 401 | The initial motivation for, and use of, this routine is not |
| 402 | so we can get the exact size of the object the BFD applies to, since |
| 403 | that might not be generally possible (archive members for example). |
| 404 | It would be ideal if someone could eventually modify |
| 405 | it so that such results were guaranteed. |
| 406 | |
| 407 | Instead, we want to ask questions like "is this NNN byte sized |
| 408 | object I'm about to try read from file offset YYY reasonable?" |
| 409 | As as example of where we might do this, some object formats |
| 410 | use string tables for which the first <<sizeof (long)>> bytes of the |
| 411 | table contain the size of the table itself, including the size bytes. |
| 412 | If an application tries to read what it thinks is one of these |
| 413 | string tables, without some way to validate the size, and for |
| 414 | some reason the size is wrong (byte swapping error, wrong location |
| 415 | for the string table, etc.), the only clue is likely to be a read |
| 416 | error when it tries to read the table, or a "virtual memory |
| 417 | exhausted" error when it tries to allocate 15 bazillon bytes |
| 418 | of space for the 15 bazillon byte table it is about to read. |
| 419 | This function at least allows us to answer the question, "is the |
| 420 | size reasonable?". |
| 421 | */ |
| 422 | |
| 423 | ufile_ptr |
| 424 | bfd_get_size (bfd *abfd) |
| 425 | { |
| 426 | struct stat buf; |
| 427 | |
| 428 | if (abfd->iovec == NULL) |
| 429 | return 0; |
| 430 | |
| 431 | if (abfd->iovec->bstat (abfd, &buf) != 0) |
| 432 | return 0; |
| 433 | |
| 434 | return buf.st_size; |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | FUNCTION |
| 439 | bfd_get_file_size |
| 440 | |
| 441 | SYNOPSIS |
| 442 | ufile_ptr bfd_get_file_size (bfd *abfd); |
| 443 | |
| 444 | DESCRIPTION |
| 445 | Return the file size (as read from file system) for the file |
| 446 | associated with BFD @var{abfd}. It supports both normal files |
| 447 | and archive elements. |
| 448 | |
| 449 | */ |
| 450 | |
| 451 | ufile_ptr |
| 452 | bfd_get_file_size (bfd *abfd) |
| 453 | { |
| 454 | if (abfd->my_archive != NULL |
| 455 | && !bfd_is_thin_archive (abfd->my_archive)) |
| 456 | return arelt_size (abfd); |
| 457 | |
| 458 | return bfd_get_size (abfd); |
| 459 | } |
| 460 | |
| 461 | /* |
| 462 | FUNCTION |
| 463 | bfd_mmap |
| 464 | |
| 465 | SYNOPSIS |
| 466 | void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, |
| 467 | int prot, int flags, file_ptr offset, |
| 468 | void **map_addr, bfd_size_type *map_len); |
| 469 | |
| 470 | DESCRIPTION |
| 471 | Return mmap()ed region of the file, if possible and implemented. |
| 472 | LEN and OFFSET do not need to be page aligned. The page aligned |
| 473 | address and length are written to MAP_ADDR and MAP_LEN. |
| 474 | |
| 475 | */ |
| 476 | |
| 477 | void * |
| 478 | bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, |
| 479 | int prot, int flags, file_ptr offset, |
| 480 | void **map_addr, bfd_size_type *map_len) |
| 481 | { |
| 482 | void *ret = (void *)-1; |
| 483 | |
| 484 | if (abfd->iovec == NULL) |
| 485 | return ret; |
| 486 | |
| 487 | return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset, |
| 488 | map_addr, map_len); |
| 489 | } |
| 490 | |
| 491 | /* Memory file I/O operations. */ |
| 492 | |
| 493 | static file_ptr |
| 494 | memory_bread (bfd *abfd, void *ptr, file_ptr size) |
| 495 | { |
| 496 | struct bfd_in_memory *bim; |
| 497 | bfd_size_type get; |
| 498 | |
| 499 | bim = (struct bfd_in_memory *) abfd->iostream; |
| 500 | get = size; |
| 501 | if (abfd->where + get > bim->size) |
| 502 | { |
| 503 | if (bim->size < (bfd_size_type) abfd->where) |
| 504 | get = 0; |
| 505 | else |
| 506 | get = bim->size - abfd->where; |
| 507 | bfd_set_error (bfd_error_file_truncated); |
| 508 | } |
| 509 | memcpy (ptr, bim->buffer + abfd->where, (size_t) get); |
| 510 | return get; |
| 511 | } |
| 512 | |
| 513 | static file_ptr |
| 514 | memory_bwrite (bfd *abfd, const void *ptr, file_ptr size) |
| 515 | { |
| 516 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; |
| 517 | |
| 518 | if (abfd->where + size > bim->size) |
| 519 | { |
| 520 | bfd_size_type newsize, oldsize; |
| 521 | |
| 522 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; |
| 523 | bim->size = abfd->where + size; |
| 524 | /* Round up to cut down on memory fragmentation */ |
| 525 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; |
| 526 | if (newsize > oldsize) |
| 527 | { |
| 528 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); |
| 529 | if (bim->buffer == NULL) |
| 530 | { |
| 531 | bim->size = 0; |
| 532 | return 0; |
| 533 | } |
| 534 | if (newsize > bim->size) |
| 535 | memset (bim->buffer + bim->size, 0, newsize - bim->size); |
| 536 | } |
| 537 | } |
| 538 | memcpy (bim->buffer + abfd->where, ptr, (size_t) size); |
| 539 | return size; |
| 540 | } |
| 541 | |
| 542 | static file_ptr |
| 543 | memory_btell (bfd *abfd) |
| 544 | { |
| 545 | return abfd->where; |
| 546 | } |
| 547 | |
| 548 | static int |
| 549 | memory_bseek (bfd *abfd, file_ptr position, int direction) |
| 550 | { |
| 551 | file_ptr nwhere; |
| 552 | struct bfd_in_memory *bim; |
| 553 | |
| 554 | bim = (struct bfd_in_memory *) abfd->iostream; |
| 555 | |
| 556 | if (direction == SEEK_SET) |
| 557 | nwhere = position; |
| 558 | else |
| 559 | nwhere = abfd->where + position; |
| 560 | |
| 561 | if (nwhere < 0) |
| 562 | { |
| 563 | abfd->where = 0; |
| 564 | errno = EINVAL; |
| 565 | return -1; |
| 566 | } |
| 567 | |
| 568 | if ((bfd_size_type)nwhere > bim->size) |
| 569 | { |
| 570 | if (abfd->direction == write_direction |
| 571 | || abfd->direction == both_direction) |
| 572 | { |
| 573 | bfd_size_type newsize, oldsize; |
| 574 | |
| 575 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; |
| 576 | bim->size = nwhere; |
| 577 | /* Round up to cut down on memory fragmentation */ |
| 578 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; |
| 579 | if (newsize > oldsize) |
| 580 | { |
| 581 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); |
| 582 | if (bim->buffer == NULL) |
| 583 | { |
| 584 | errno = EINVAL; |
| 585 | bim->size = 0; |
| 586 | return -1; |
| 587 | } |
| 588 | memset (bim->buffer + oldsize, 0, newsize - oldsize); |
| 589 | } |
| 590 | } |
| 591 | else |
| 592 | { |
| 593 | abfd->where = bim->size; |
| 594 | errno = EINVAL; |
| 595 | bfd_set_error (bfd_error_file_truncated); |
| 596 | return -1; |
| 597 | } |
| 598 | } |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | static int |
| 603 | memory_bclose (struct bfd *abfd) |
| 604 | { |
| 605 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; |
| 606 | |
| 607 | if (bim->buffer != NULL) |
| 608 | free (bim->buffer); |
| 609 | free (bim); |
| 610 | abfd->iostream = NULL; |
| 611 | |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | static int |
| 616 | memory_bflush (bfd *abfd ATTRIBUTE_UNUSED) |
| 617 | { |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | static int |
| 622 | memory_bstat (bfd *abfd, struct stat *statbuf) |
| 623 | { |
| 624 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; |
| 625 | |
| 626 | memset (statbuf, 0, sizeof (*statbuf)); |
| 627 | statbuf->st_size = bim->size; |
| 628 | |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | static void * |
| 633 | memory_bmmap (bfd *abfd ATTRIBUTE_UNUSED, void *addr ATTRIBUTE_UNUSED, |
| 634 | bfd_size_type len ATTRIBUTE_UNUSED, int prot ATTRIBUTE_UNUSED, |
| 635 | int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED, |
| 636 | void **map_addr ATTRIBUTE_UNUSED, |
| 637 | bfd_size_type *map_len ATTRIBUTE_UNUSED) |
| 638 | { |
| 639 | return (void *)-1; |
| 640 | } |
| 641 | |
| 642 | const struct bfd_iovec _bfd_memory_iovec = |
| 643 | { |
| 644 | &memory_bread, &memory_bwrite, &memory_btell, &memory_bseek, |
| 645 | &memory_bclose, &memory_bflush, &memory_bstat, &memory_bmmap |
| 646 | }; |