1 /* Low-level I/O routines for BFDs.
2
3 Copyright (C) 1990-2023 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 #include "aout/ar.h"
29 #if defined (_WIN32)
30 #include <windows.h>
31 #include <locale.h>
32 #endif
33
34 #ifndef S_IXUSR
35 #define S_IXUSR 0100 /* Execute by owner. */
36 #endif
37 #ifndef S_IXGRP
38 #define S_IXGRP 0010 /* Execute by group. */
39 #endif
40 #ifndef S_IXOTH
41 #define S_IXOTH 0001 /* Execute by others. */
42 #endif
43
44 #ifndef FD_CLOEXEC
45 #define FD_CLOEXEC 1
46 #endif
47
48 file_ptr
49 _bfd_real_ftell (FILE *file)
50 {
51 #if defined (HAVE_FTELLO64)
52 return ftello64 (file);
53 #elif defined (HAVE_FTELLO)
54 return ftello (file);
55 #else
56 return ftell (file);
57 #endif
58 }
59
60 int
61 _bfd_real_fseek (FILE *file, file_ptr offset, int whence)
62 {
63 #if defined (HAVE_FSEEKO64)
64 return fseeko64 (file, offset, whence);
65 #elif defined (HAVE_FSEEKO)
66 return fseeko (file, offset, whence);
67 #else
68 return fseek (file, offset, whence);
69 #endif
70 }
71
72 /* Mark FILE as close-on-exec. Return FILE. FILE may be NULL, in
73 which case nothing is done. */
74 static FILE *
75 close_on_exec (FILE *file)
76 {
77 #if defined (HAVE_FILENO) && defined (F_GETFD)
78 if (file)
79 {
80 int fd = fileno (file);
81 int old = fcntl (fd, F_GETFD, 0);
82 if (old >= 0)
83 fcntl (fd, F_SETFD, old | FD_CLOEXEC);
84 }
85 #endif
86 return file;
87 }
88
89 FILE *
90 _bfd_real_fopen (const char *filename, const char *modes)
91 {
92 #ifdef VMS
93 char *vms_attr;
94
95 /* On VMS, fopen allows file attributes as optional arguments.
96 We need to use them but we'd better to use the common prototype.
97 In fopen-vms.h, they are separated from the mode with a comma.
98 Split here. */
99 vms_attr = strchr (modes, ',');
100 if (vms_attr != NULL)
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
119 #elif defined (_WIN32)
120 /* PR 25713: Handle extra long path names possibly containing '..' and '.'. */
121 wchar_t ** lpFilePart = {NULL};
122 const wchar_t prefix[] = L"\\\\?\\";
123 const size_t partPathLen = strlen (filename) + 1;
124 #ifdef __MINGW32__
125 #if !HAVE_DECL____LC_CODEPAGE_FUNC
126 /* This prototype was added to locale.h in version 9.0 of MinGW-w64. */
127 _CRTIMP unsigned int __cdecl ___lc_codepage_func (void);
128 #endif
129 const unsigned int cp = ___lc_codepage_func ();
130 #else
131 const unsigned int cp = CP_UTF8;
132 #endif
133
134 /* Converting the partial path from ascii to unicode.
135 1) Get the length: Calling with lpWideCharStr set to null returns the length.
136 2) Convert the string: Calling with cbMultiByte set to -1 includes the terminating null. */
137 size_t partPathWSize = MultiByteToWideChar (cp, 0, filename, -1, NULL, 0);
138 wchar_t * partPath = calloc (partPathWSize, sizeof(wchar_t));
139 size_t ix;
140
141 MultiByteToWideChar (cp, 0, filename, -1, partPath, partPathWSize);
142
143 /* Convert any UNIX style path separators into the DOS i.e. backslash separator. */
144 for (ix = 0; ix < partPathLen; ix++)
145 if (IS_UNIX_DIR_SEPARATOR(filename[ix]))
146 partPath[ix] = '\\';
147
148 /* Getting the full path from the provided partial path.
149 1) Get the length.
150 2) Resolve the path. */
151 long fullPathWSize = GetFullPathNameW (partPath, 0, NULL, lpFilePart);
152 wchar_t * fullPath = calloc (fullPathWSize + sizeof(prefix) + 1, sizeof(wchar_t));
153
154 wcscpy (fullPath, prefix);
155
156 int prefixLen = sizeof(prefix) / sizeof(wchar_t);
157
158 /* Do not add a prefix to the null device. */
159 if (stricmp (filename, "nul") == 0)
160 prefixLen = 1;
161
162 wchar_t * fullPathOffset = fullPath + prefixLen - 1;
163
164 GetFullPathNameW (partPath, fullPathWSize, fullPathOffset, lpFilePart);
165 free (partPath);
166
167 /* It is non-standard for modes to exceed 16 characters. */
168 wchar_t modesW[16];
169
170 MultiByteToWideChar (cp, 0, modes, -1, modesW, sizeof(modesW));
171
172 FILE * file = _wfopen (fullPath, modesW);
173 free (fullPath);
174
175 return close_on_exec (file);
176
177 #elif defined (HAVE_FOPEN64)
178 return close_on_exec (fopen64 (filename, modes));
179
180 #else
181 return close_on_exec (fopen (filename, modes));
182 #endif
183 }
184
185 /*
186 INTERNAL_DEFINITION
187 struct bfd_iovec
188
189 DESCRIPTION
190
191 The <<struct bfd_iovec>> contains the internal file I/O class.
192 Each <<BFD>> has an instance of this class and all file I/O is
193 routed through it (it is assumed that the instance implements
194 all methods listed below).
195
196 .struct bfd_iovec
197 .{
198 . {* To avoid problems with macros, a "b" rather than "f"
199 . prefix is prepended to each method name. *}
200 . {* Attempt to read/write NBYTES on ABFD's IOSTREAM storing/fetching
201 . bytes starting at PTR. Return the number of bytes actually
202 . transfered (a read past end-of-file returns less than NBYTES),
203 . or -1 (setting <<bfd_error>>) if an error occurs. *}
204 . file_ptr (*bread) (struct bfd *abfd, void *ptr, file_ptr nbytes);
205 . file_ptr (*bwrite) (struct bfd *abfd, const void *ptr,
206 . file_ptr nbytes);
207 . {* Return the current IOSTREAM file offset, or -1 (setting <<bfd_error>>
208 . if an error occurs. *}
209 . file_ptr (*btell) (struct bfd *abfd);
210 . {* For the following, on successful completion a value of 0 is returned.
211 . Otherwise, a value of -1 is returned (and <<bfd_error>> is set). *}
212 . int (*bseek) (struct bfd *abfd, file_ptr offset, int whence);
213 . int (*bclose) (struct bfd *abfd);
214 . int (*bflush) (struct bfd *abfd);
215 . int (*bstat) (struct bfd *abfd, struct stat *sb);
216 . {* Mmap a part of the files. ADDR, LEN, PROT, FLAGS and OFFSET are the usual
217 . mmap parameter, except that LEN and OFFSET do not need to be page
218 . aligned. Returns (void *)-1 on failure, mmapped address on success.
219 . Also write in MAP_ADDR the address of the page aligned buffer and in
220 . MAP_LEN the size mapped (a page multiple). Use unmap with MAP_ADDR and
221 . MAP_LEN to unmap. *}
222 . void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len,
223 . int prot, int flags, file_ptr offset,
224 . void **map_addr, bfd_size_type *map_len);
225 .};
226
227 .extern const struct bfd_iovec _bfd_memory_iovec;
228 .
229 */
230
231
232 /*
233 FUNCTION
234 bfd_bread
235
236 SYNOPSIS
237 bfd_size_type bfd_bread (void *, bfd_size_type, bfd *);
238
239 DESCRIPTION
240 Attempt to read SIZE bytes from ABFD's iostream to PTR.
241 Return the amount read.
242 */
243
244 bfd_size_type
245 bfd_bread (void *ptr, bfd_size_type size, bfd *abfd)
246 {
247 file_ptr nread;
248 bfd *element_bfd = abfd;
249 ufile_ptr offset = 0;
250
251 while (abfd->my_archive != NULL
252 && !bfd_is_thin_archive (abfd->my_archive))
253 {
254 offset += abfd->origin;
255 abfd = abfd->my_archive;
256 }
257 offset += abfd->origin;
258
259 /* If this is a non-thin archive element, don't read past the end of
260 this element. */
261 if (element_bfd->arelt_data != NULL
262 && element_bfd->my_archive != NULL
263 && !bfd_is_thin_archive (element_bfd->my_archive))
264 {
265 bfd_size_type maxbytes = arelt_size (element_bfd);
266
267 if (abfd->where < offset || abfd->where - offset >= maxbytes)
268 {
269 bfd_set_error (bfd_error_invalid_operation);
270 return -1;
271 }
272 if (abfd->where - offset + size > maxbytes)
273 size = maxbytes - (abfd->where - offset);
274 }
275
276 if (abfd->iovec == NULL)
277 {
278 bfd_set_error (bfd_error_invalid_operation);
279 return -1;
280 }
281
282 nread = abfd->iovec->bread (abfd, ptr, size);
283 if (nread != -1)
284 abfd->where += nread;
285
286 return nread;
287 }
288
289 /*
290 FUNCTION
291 bfd_bwrite
292
293 SYNOPSIS
294 bfd_size_type bfd_bwrite (const void *, bfd_size_type, bfd *);
295
296 DESCRIPTION
297 Attempt to write SIZE bytes to ABFD's iostream from PTR.
298 Return the amount written.
299 */
300
301 bfd_size_type
302 bfd_bwrite (const void *ptr, bfd_size_type size, bfd *abfd)
303 {
304 file_ptr nwrote;
305
306 while (abfd->my_archive != NULL
307 && !bfd_is_thin_archive (abfd->my_archive))
308 abfd = abfd->my_archive;
309
310 if (abfd->iovec == NULL)
311 {
312 bfd_set_error (bfd_error_invalid_operation);
313 return -1;
314 }
315
316 nwrote = abfd->iovec->bwrite (abfd, ptr, size);
317 if (nwrote != -1)
318 abfd->where += nwrote;
319 if ((bfd_size_type) nwrote != size)
320 {
321 #ifdef ENOSPC
322 errno = ENOSPC;
323 #endif
324 bfd_set_error (bfd_error_system_call);
325 }
326 return nwrote;
327 }
328
329 /*
330 FUNCTION
331 bfd_tell
332
333 SYNOPSIS
334 file_ptr bfd_tell (bfd *);
335
336 DESCRIPTION
337 Return ABFD's iostream file position.
338 */
339
340 file_ptr
341 bfd_tell (bfd *abfd)
342 {
343 ufile_ptr offset = 0;
344 file_ptr ptr;
345
346 while (abfd->my_archive != NULL
347 && !bfd_is_thin_archive (abfd->my_archive))
348 {
349 offset += abfd->origin;
350 abfd = abfd->my_archive;
351 }
352 offset += abfd->origin;
353
354 if (abfd->iovec == NULL)
355 return 0;
356
357 ptr = abfd->iovec->btell (abfd);
358 abfd->where = ptr;
359 return ptr - offset;
360 }
361
362 /*
363 FUNCTION
364 bfd_flush
365
366 SYNOPSIS
367 int bfd_flush (bfd *);
368
369 DESCRIPTION
370 Flush ABFD's iostream pending IO.
371 */
372
373 int
374 bfd_flush (bfd *abfd)
375 {
376 while (abfd->my_archive != NULL
377 && !bfd_is_thin_archive (abfd->my_archive))
378 abfd = abfd->my_archive;
379
380 if (abfd->iovec == NULL)
381 return 0;
382
383 return abfd->iovec->bflush (abfd);
384 }
385
386 /*
387 FUNCTION
388 bfd_stat
389
390 SYNOPSIS
391 int bfd_stat (bfd *, struct stat *);
392
393 DESCRIPTION
394 Call fstat on ABFD's iostream. Return 0 on success, and a
395 negative value on failure.
396 */
397
398 int
399 bfd_stat (bfd *abfd, struct stat *statbuf)
400 {
401 int result;
402
403 while (abfd->my_archive != NULL
404 && !bfd_is_thin_archive (abfd->my_archive))
405 abfd = abfd->my_archive;
406
407 if (abfd->iovec == NULL)
408 {
409 bfd_set_error (bfd_error_invalid_operation);
410 return -1;
411 }
412
413 result = abfd->iovec->bstat (abfd, statbuf);
414 if (result < 0)
415 bfd_set_error (bfd_error_system_call);
416 return result;
417 }
418
419 /*
420 FUNCTION
421 bfd_seek
422
423 SYNOPSIS
424 int bfd_seek (bfd *, file_ptr, int);
425
426 DESCRIPTION
427 Call fseek on ABFD's iostream. Return 0 on success, and a
428 negative value on failure.
429 */
430
431 int
432 bfd_seek (bfd *abfd, file_ptr position, int direction)
433 {
434 int result;
435 ufile_ptr offset = 0;
436
437 while (abfd->my_archive != NULL
438 && !bfd_is_thin_archive (abfd->my_archive))
439 {
440 offset += abfd->origin;
441 abfd = abfd->my_archive;
442 }
443 offset += abfd->origin;
444
445 if (abfd->iovec == NULL)
446 {
447 bfd_set_error (bfd_error_invalid_operation);
448 return -1;
449 }
450
451 /* For the time being, a BFD may not seek to it's end. The problem
452 is that we don't easily have a way to recognize the end of an
453 element in an archive. */
454 BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR);
455
456 if (direction != SEEK_CUR)
457 position += offset;
458
459 result = abfd->iovec->bseek (abfd, position, direction);
460 if (result != 0)
461 {
462 /* An EINVAL error probably means that the file offset was
463 absurd. */
464 if (errno == EINVAL)
465 bfd_set_error (bfd_error_file_truncated);
466 else
467 bfd_set_error (bfd_error_system_call);
468 }
469 else
470 {
471 /* Adjust `where' field. */
472 if (direction == SEEK_CUR)
473 abfd->where += position;
474 else
475 abfd->where = position;
476 }
477
478 return result;
479 }
480
481 /*
482 FUNCTION
483 bfd_get_mtime
484
485 SYNOPSIS
486 long bfd_get_mtime (bfd *abfd);
487
488 DESCRIPTION
489 Return the file modification time (as read from the file system, or
490 from the archive header for archive members).
491
492 */
493
494 long
495 bfd_get_mtime (bfd *abfd)
496 {
497 struct stat buf;
498
499 if (abfd->mtime_set)
500 return abfd->mtime;
501
502 if (bfd_stat (abfd, &buf) != 0)
503 return 0;
504
505 abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */
506 return buf.st_mtime;
507 }
508
509 /*
510 FUNCTION
511 bfd_get_size
512
513 SYNOPSIS
514 ufile_ptr bfd_get_size (bfd *abfd);
515
516 DESCRIPTION
517 Return the file size (as read from file system) for the file
518 associated with BFD @var{abfd}.
519
520 The initial motivation for, and use of, this routine is not
521 so we can get the exact size of the object the BFD applies to, since
522 that might not be generally possible (archive members for example).
523 It would be ideal if someone could eventually modify
524 it so that such results were guaranteed.
525
526 Instead, we want to ask questions like "is this NNN byte sized
527 object I'm about to try read from file offset YYY reasonable?"
528 As as example of where we might do this, some object formats
529 use string tables for which the first <<sizeof (long)>> bytes of the
530 table contain the size of the table itself, including the size bytes.
531 If an application tries to read what it thinks is one of these
532 string tables, without some way to validate the size, and for
533 some reason the size is wrong (byte swapping error, wrong location
534 for the string table, etc.), the only clue is likely to be a read
535 error when it tries to read the table, or a "virtual memory
536 exhausted" error when it tries to allocate 15 bazillon bytes
537 of space for the 15 bazillon byte table it is about to read.
538 This function at least allows us to answer the question, "is the
539 size reasonable?".
540
541 A return value of zero indicates the file size is unknown.
542 */
543
544 ufile_ptr
545 bfd_get_size (bfd *abfd)
546 {
547 /* A size of 0 means we haven't yet called bfd_stat. A size of 1
548 means we have a cached value of 0, ie. unknown. */
549 if (abfd->size <= 1 || bfd_write_p (abfd))
550 {
551 struct stat buf;
552
553 if (abfd->size == 1 && !bfd_write_p (abfd))
554 return 0;
555
556 if (bfd_stat (abfd, &buf) != 0
557 || buf.st_size == 0
558 || buf.st_size - (ufile_ptr) buf.st_size != 0)
559 {
560 abfd->size = 1;
561 return 0;
562 }
563 abfd->size = buf.st_size;
564 }
565 return abfd->size;
566 }
567
568 /*
569 FUNCTION
570 bfd_get_file_size
571
572 SYNOPSIS
573 ufile_ptr bfd_get_file_size (bfd *abfd);
574
575 DESCRIPTION
576 Return the file size (as read from file system) for the file
577 associated with BFD @var{abfd}. It supports both normal files
578 and archive elements.
579
580 */
581
582 ufile_ptr
583 bfd_get_file_size (bfd *abfd)
584 {
585 ufile_ptr file_size, archive_size = (ufile_ptr) -1;
586 unsigned int compression_p2 = 0;
587
588 if (abfd->my_archive != NULL
589 && !bfd_is_thin_archive (abfd->my_archive))
590 {
591 struct areltdata *adata = (struct areltdata *) abfd->arelt_data;
592 if (adata != NULL)
593 {
594 archive_size = adata->parsed_size;
595 /* If the archive is compressed, assume an element won't
596 expand more than eight times file size. */
597 if (adata->arch_header != NULL
598 && memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag,
599 "Z\012", 2) == 0)
600 compression_p2 = 3;
601 abfd = abfd->my_archive;
602 }
603 }
604
605 file_size = bfd_get_size (abfd) << compression_p2;
606 if (archive_size < file_size)
607 return archive_size;
608 return file_size;
609 }
610
611 /*
612 FUNCTION
613 bfd_mmap
614
615 SYNOPSIS
616 void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
617 int prot, int flags, file_ptr offset,
618 void **map_addr, bfd_size_type *map_len);
619
620 DESCRIPTION
621 Return mmap()ed region of the file, if possible and implemented.
622 LEN and OFFSET do not need to be page aligned. The page aligned
623 address and length are written to MAP_ADDR and MAP_LEN.
624
625 */
626
627 void *
628 bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
629 int prot, int flags, file_ptr offset,
630 void **map_addr, bfd_size_type *map_len)
631 {
632 while (abfd->my_archive != NULL
633 && !bfd_is_thin_archive (abfd->my_archive))
634 {
635 offset += abfd->origin;
636 abfd = abfd->my_archive;
637 }
638 offset += abfd->origin;
639
640 if (abfd->iovec == NULL)
641 {
642 bfd_set_error (bfd_error_invalid_operation);
643 return (void *) -1;
644 }
645
646 return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset,
647 map_addr, map_len);
648 }
649
650 /* Memory file I/O operations. */
651
652 static file_ptr
653 memory_bread (bfd *abfd, void *ptr, file_ptr size)
654 {
655 struct bfd_in_memory *bim;
656 bfd_size_type get;
657
658 bim = (struct bfd_in_memory *) abfd->iostream;
659 get = size;
660 if (abfd->where + get > bim->size)
661 {
662 if (bim->size < (bfd_size_type) abfd->where)
663 get = 0;
664 else
665 get = bim->size - abfd->where;
666 bfd_set_error (bfd_error_file_truncated);
667 }
668 memcpy (ptr, bim->buffer + abfd->where, (size_t) get);
669 return get;
670 }
671
672 static file_ptr
673 memory_bwrite (bfd *abfd, const void *ptr, file_ptr size)
674 {
675 struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream;
676
677 if (abfd->where + size > bim->size)
678 {
679 bfd_size_type newsize, oldsize;
680
681 oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
682 bim->size = abfd->where + size;
683 /* Round up to cut down on memory fragmentation */
684 newsize = (bim->size + 127) & ~(bfd_size_type) 127;
685 if (newsize > oldsize)
686 {
687 bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize);
688 if (bim->buffer == NULL)
689 {
690 bim->size = 0;
691 return 0;
692 }
693 if (newsize > bim->size)
694 memset (bim->buffer + bim->size, 0, newsize - bim->size);
695 }
696 }
697 memcpy (bim->buffer + abfd->where, ptr, (size_t) size);
698 return size;
699 }
700
701 static file_ptr
702 memory_btell (bfd *abfd)
703 {
704 return abfd->where;
705 }
706
707 static int
708 memory_bseek (bfd *abfd, file_ptr position, int direction)
709 {
710 file_ptr nwhere;
711 struct bfd_in_memory *bim;
712
713 bim = (struct bfd_in_memory *) abfd->iostream;
714
715 if (direction == SEEK_SET)
716 nwhere = position;
717 else
718 nwhere = abfd->where + position;
719
720 if (nwhere < 0)
721 {
722 abfd->where = 0;
723 errno = EINVAL;
724 return -1;
725 }
726
727 if ((bfd_size_type)nwhere > bim->size)
728 {
729 if (abfd->direction == write_direction
730 || abfd->direction == both_direction)
731 {
732 bfd_size_type newsize, oldsize;
733
734 oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
735 bim->size = nwhere;
736 /* Round up to cut down on memory fragmentation */
737 newsize = (bim->size + 127) & ~(bfd_size_type) 127;
738 if (newsize > oldsize)
739 {
740 bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize);
741 if (bim->buffer == NULL)
742 {
743 errno = EINVAL;
744 bim->size = 0;
745 return -1;
746 }
747 memset (bim->buffer + oldsize, 0, newsize - oldsize);
748 }
749 }
750 else
751 {
752 abfd->where = bim->size;
753 errno = EINVAL;
754 bfd_set_error (bfd_error_file_truncated);
755 return -1;
756 }
757 }
758 return 0;
759 }
760
761 static int
762 memory_bclose (struct bfd *abfd)
763 {
764 struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream;
765
766 free (bim->buffer);
767 free (bim);
768 abfd->iostream = NULL;
769
770 return 0;
771 }
772
773 static int
774 memory_bflush (bfd *abfd ATTRIBUTE_UNUSED)
775 {
776 return 0;
777 }
778
779 static int
780 memory_bstat (bfd *abfd, struct stat *statbuf)
781 {
782 struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream;
783
784 memset (statbuf, 0, sizeof (*statbuf));
785 statbuf->st_size = bim->size;
786
787 return 0;
788 }
789
790 static void *
791 memory_bmmap (bfd *abfd ATTRIBUTE_UNUSED, void *addr ATTRIBUTE_UNUSED,
792 bfd_size_type len ATTRIBUTE_UNUSED, int prot ATTRIBUTE_UNUSED,
793 int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED,
794 void **map_addr ATTRIBUTE_UNUSED,
795 bfd_size_type *map_len ATTRIBUTE_UNUSED)
796 {
797 return (void *)-1;
798 }
799
800 const struct bfd_iovec _bfd_memory_iovec =
801 {
802 &memory_bread, &memory_bwrite, &memory_btell, &memory_bseek,
803 &memory_bclose, &memory_bflush, &memory_bstat, &memory_bmmap
804 };