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Commit | Line | Data |
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93509525 | 1 | /* Low-level I/O routines for BFDs. |
7c192733 | 2 | |
a2c58332 | 3 | Copyright (C) 1990-2022 Free Software Foundation, Inc. |
7c192733 | 4 | |
93509525 KD |
5 | Written by Cygnus Support. |
6 | ||
cd123cb7 | 7 | This file is part of BFD, the Binary File Descriptor library. |
93509525 | 8 | |
cd123cb7 NC |
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. | |
93509525 | 13 | |
cd123cb7 NC |
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. | |
93509525 | 18 | |
cd123cb7 NC |
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. */ | |
93509525 KD |
23 | |
24 | #include "sysdep.h" | |
3db64b00 | 25 | #include <limits.h> |
93509525 KD |
26 | #include "bfd.h" |
27 | #include "libbfd.h" | |
b570b954 | 28 | #include "aout/ar.h" |
0b8448af NC |
29 | #if defined (_WIN32) |
30 | #include <windows.h> | |
31 | #endif | |
93509525 | 32 | |
93509525 KD |
33 | #ifndef S_IXUSR |
34 | #define S_IXUSR 0100 /* Execute by owner. */ | |
35 | #endif | |
36 | #ifndef S_IXGRP | |
37 | #define S_IXGRP 0010 /* Execute by group. */ | |
38 | #endif | |
39 | #ifndef S_IXOTH | |
40 | #define S_IXOTH 0001 /* Execute by others. */ | |
41 | #endif | |
42 | ||
428b207a TT |
43 | #ifndef FD_CLOEXEC |
44 | #define FD_CLOEXEC 1 | |
45 | #endif | |
46 | ||
7c192733 | 47 | file_ptr |
c7c3d11b | 48 | _bfd_real_ftell (FILE *file) |
7c192733 AC |
49 | { |
50 | #if defined (HAVE_FTELLO64) | |
51 | return ftello64 (file); | |
52 | #elif defined (HAVE_FTELLO) | |
53 | return ftello (file); | |
54 | #else | |
55 | return ftell (file); | |
56 | #endif | |
57 | } | |
58 | ||
59 | int | |
c7c3d11b | 60 | _bfd_real_fseek (FILE *file, file_ptr offset, int whence) |
7c192733 AC |
61 | { |
62 | #if defined (HAVE_FSEEKO64) | |
63 | return fseeko64 (file, offset, whence); | |
64 | #elif defined (HAVE_FSEEKO) | |
65 | return fseeko (file, offset, whence); | |
66 | #else | |
67 | return fseek (file, offset, whence); | |
68 | #endif | |
69 | } | |
70 | ||
428b207a TT |
71 | /* Mark FILE as close-on-exec. Return FILE. FILE may be NULL, in |
72 | which case nothing is done. */ | |
73 | static FILE * | |
74 | close_on_exec (FILE *file) | |
75 | { | |
76 | #if defined (HAVE_FILENO) && defined (F_GETFD) | |
77 | if (file) | |
78 | { | |
79 | int fd = fileno (file); | |
80 | int old = fcntl (fd, F_GETFD, 0); | |
81 | if (old >= 0) | |
82 | fcntl (fd, F_SETFD, old | FD_CLOEXEC); | |
83 | } | |
84 | #endif | |
85 | return file; | |
86 | } | |
87 | ||
2e6f4fae | 88 | FILE * |
c7c3d11b | 89 | _bfd_real_fopen (const char *filename, const char *modes) |
2e6f4fae | 90 | { |
d387240a | 91 | #ifdef VMS |
d387240a TG |
92 | char *vms_attr; |
93 | ||
9aff4b7a | 94 | /* On VMS, fopen allows file attributes as optional arguments. |
d387240a TG |
95 | We need to use them but we'd better to use the common prototype. |
96 | In fopen-vms.h, they are separated from the mode with a comma. | |
97 | Split here. */ | |
98 | vms_attr = strchr (modes, ','); | |
0b8448af | 99 | if (vms_attr != NULL) |
d387240a | 100 | { |
0c376465 TG |
101 | /* Attributes found. Split. */ |
102 | size_t modes_len = strlen (modes) + 1; | |
103 | char attrs[modes_len + 1]; | |
104 | char *at[3]; | |
105 | int i; | |
106 | ||
107 | memcpy (attrs, modes, modes_len); | |
108 | at[0] = attrs; | |
109 | for (i = 0; i < 2; i++) | |
110 | { | |
111 | at[i + 1] = strchr (at[i], ','); | |
112 | BFD_ASSERT (at[i + 1] != NULL); | |
113 | *(at[i + 1]++) = 0; /* Replace ',' with a nul, and skip it. */ | |
114 | } | |
115 | return close_on_exec (fopen (filename, at[0], at[1], at[2])); | |
d387240a | 116 | } |
0b8448af NC |
117 | |
118 | #elif defined (_WIN32) | |
ba0eb22c NC |
119 | /* PR 25713: Handle extra long path names possibly containing '..' and '.'. */ |
120 | wchar_t ** lpFilePart = {NULL}; | |
121 | const wchar_t prefix[] = L"\\\\?\\"; | |
122 | const wchar_t ccs[] = L", ccs=UNICODE"; | |
123 | const size_t partPathLen = strlen (filename) + 1; | |
17d60030 | 124 | |
cb7da2a6 | 125 | /* Converting the partial path from ascii to unicode. |
ba0eb22c NC |
126 | 1) Get the length: Calling with lpWideCharStr set to null returns the length. |
127 | 2) Convert the string: Calling with cbMultiByte set to -1 includes the terminating null. */ | |
128 | size_t partPathWSize = MultiByteToWideChar (CP_UTF8, 0, filename, -1, NULL, 0); | |
129 | wchar_t * partPath = calloc (partPathWSize, sizeof(wchar_t)); | |
130 | size_t ix; | |
17d60030 | 131 | |
ba0eb22c | 132 | MultiByteToWideChar (CP_UTF8, 0, filename, -1, partPath, partPathWSize); |
17d60030 | 133 | |
cb7da2a6 | 134 | /* Convert any UNIX style path separators into the DOS i.e. backslash separator. */ |
cb7da2a6 TS |
135 | for (ix = 0; ix < partPathLen; ix++) |
136 | if (IS_UNIX_DIR_SEPARATOR(filename[ix])) | |
137 | partPath[ix] = '\\'; | |
0b8448af | 138 | |
cb7da2a6 | 139 | /* Getting the full path from the provided partial path. |
ba0eb22c NC |
140 | 1) Get the length. |
141 | 2) Resolve the path. */ | |
142 | long fullPathWSize = GetFullPathNameW (partPath, 0, NULL, lpFilePart); | |
143 | wchar_t * fullPath = calloc (fullPathWSize + sizeof(prefix) + 1, sizeof(wchar_t)); | |
cb7da2a6 TS |
144 | |
145 | wcscpy (fullPath, prefix); | |
ba0eb22c NC |
146 | |
147 | int prefixLen = sizeof(prefix) / sizeof(wchar_t); | |
148 | wchar_t * fullPathOffset = fullPath + prefixLen - 1; | |
149 | ||
cb7da2a6 TS |
150 | GetFullPathNameW (partPath, fullPathWSize, fullPathOffset, lpFilePart); |
151 | free (partPath); | |
152 | ||
153 | /* It is non-standard for modes to exceed 16 characters. */ | |
ba0eb22c NC |
154 | wchar_t modesW[16 + sizeof(ccs)]; |
155 | ||
cb7da2a6 TS |
156 | MultiByteToWideChar (CP_UTF8, 0, modes, -1, modesW, sizeof(modesW)); |
157 | wcscat (modesW, ccs); | |
158 | ||
ba0eb22c | 159 | FILE * file = _wfopen (fullPath, modesW); |
cb7da2a6 TS |
160 | free (fullPath); |
161 | ||
162 | return close_on_exec (file); | |
0b8448af NC |
163 | |
164 | #elif defined (HAVE_FOPEN64) | |
428b207a | 165 | return close_on_exec (fopen64 (filename, modes)); |
0b8448af | 166 | |
cb7da2a6 | 167 | #else |
0b8448af | 168 | return close_on_exec (fopen (filename, modes)); |
cb7da2a6 | 169 | #endif |
2e6f4fae DJ |
170 | } |
171 | ||
40838a72 AC |
172 | /* |
173 | INTERNAL_DEFINITION | |
174 | struct bfd_iovec | |
93509525 | 175 | |
40838a72 | 176 | DESCRIPTION |
93509525 | 177 | |
40838a72 AC |
178 | The <<struct bfd_iovec>> contains the internal file I/O class. |
179 | Each <<BFD>> has an instance of this class and all file I/O is | |
180 | routed through it (it is assumed that the instance implements | |
181 | all methods listed below). | |
182 | ||
183 | .struct bfd_iovec | |
184 | .{ | |
185 | . {* To avoid problems with macros, a "b" rather than "f" | |
186 | . prefix is prepended to each method name. *} | |
187 | . {* Attempt to read/write NBYTES on ABFD's IOSTREAM storing/fetching | |
188 | . bytes starting at PTR. Return the number of bytes actually | |
189 | . transfered (a read past end-of-file returns less than NBYTES), | |
190 | . or -1 (setting <<bfd_error>>) if an error occurs. *} | |
191 | . file_ptr (*bread) (struct bfd *abfd, void *ptr, file_ptr nbytes); | |
192 | . file_ptr (*bwrite) (struct bfd *abfd, const void *ptr, | |
07d6d2b8 | 193 | . file_ptr nbytes); |
40838a72 AC |
194 | . {* Return the current IOSTREAM file offset, or -1 (setting <<bfd_error>> |
195 | . if an error occurs. *} | |
196 | . file_ptr (*btell) (struct bfd *abfd); | |
197 | . {* For the following, on successful completion a value of 0 is returned. | |
07d6d2b8 | 198 | . Otherwise, a value of -1 is returned (and <<bfd_error>> is set). *} |
40838a72 | 199 | . int (*bseek) (struct bfd *abfd, file_ptr offset, int whence); |
405bf443 | 200 | . int (*bclose) (struct bfd *abfd); |
40838a72 AC |
201 | . int (*bflush) (struct bfd *abfd); |
202 | . int (*bstat) (struct bfd *abfd, struct stat *sb); | |
4c95ab76 TG |
203 | . {* Mmap a part of the files. ADDR, LEN, PROT, FLAGS and OFFSET are the usual |
204 | . mmap parameter, except that LEN and OFFSET do not need to be page | |
205 | . aligned. Returns (void *)-1 on failure, mmapped address on success. | |
206 | . Also write in MAP_ADDR the address of the page aligned buffer and in | |
207 | . MAP_LEN the size mapped (a page multiple). Use unmap with MAP_ADDR and | |
208 | . MAP_LEN to unmap. *} | |
f07749bb | 209 | . void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len, |
07d6d2b8 AM |
210 | . int prot, int flags, file_ptr offset, |
211 | . void **map_addr, bfd_size_type *map_len); | |
40838a72 | 212 | .}; |
93509525 | 213 | |
65077aa8 TG |
214 | .extern const struct bfd_iovec _bfd_memory_iovec; |
215 | ||
40838a72 | 216 | */ |
93509525 | 217 | |
93509525 KD |
218 | |
219 | /* Return value is amount read. */ | |
220 | ||
221 | bfd_size_type | |
c58b9523 | 222 | bfd_bread (void *ptr, bfd_size_type size, bfd *abfd) |
93509525 | 223 | { |
5c4ce239 AM |
224 | file_ptr nread; |
225 | bfd *element_bfd = abfd; | |
226 | ufile_ptr offset = 0; | |
227 | ||
228 | while (abfd->my_archive != NULL | |
229 | && !bfd_is_thin_archive (abfd->my_archive)) | |
230 | { | |
231 | offset += abfd->origin; | |
232 | abfd = abfd->my_archive; | |
233 | } | |
4d095f5b | 234 | offset += abfd->origin; |
93509525 | 235 | |
c17eb63b | 236 | /* If this is a non-thin archive element, don't read past the end of |
1fb41da4 | 237 | this element. */ |
c17eb63b L |
238 | if (element_bfd->arelt_data != NULL |
239 | && element_bfd->my_archive != NULL | |
240 | && !bfd_is_thin_archive (element_bfd->my_archive)) | |
1fb41da4 | 241 | { |
5c4ce239 | 242 | bfd_size_type maxbytes = arelt_size (element_bfd); |
f1bb16f8 | 243 | |
5c4ce239 | 244 | if (abfd->where < offset || abfd->where - offset >= maxbytes) |
07d6d2b8 | 245 | { |
5c4ce239 AM |
246 | bfd_set_error (bfd_error_invalid_operation); |
247 | return -1; | |
07d6d2b8 | 248 | } |
5c4ce239 AM |
249 | if (abfd->where - offset + size > maxbytes) |
250 | size = maxbytes - (abfd->where - offset); | |
1fb41da4 AM |
251 | } |
252 | ||
5c4ce239 AM |
253 | if (abfd->iovec == NULL) |
254 | { | |
255 | bfd_set_error (bfd_error_invalid_operation); | |
256 | return -1; | |
257 | } | |
258 | ||
259 | nread = abfd->iovec->bread (abfd, ptr, size); | |
260 | if (nread != -1) | |
93509525 KD |
261 | abfd->where += nread; |
262 | ||
93509525 KD |
263 | return nread; |
264 | } | |
265 | ||
266 | bfd_size_type | |
c58b9523 | 267 | bfd_bwrite (const void *ptr, bfd_size_type size, bfd *abfd) |
93509525 | 268 | { |
5c4ce239 | 269 | file_ptr nwrote; |
93509525 | 270 | |
5c4ce239 AM |
271 | while (abfd->my_archive != NULL |
272 | && !bfd_is_thin_archive (abfd->my_archive)) | |
273 | abfd = abfd->my_archive; | |
69fd4758 | 274 | |
5c4ce239 AM |
275 | if (abfd->iovec == NULL) |
276 | { | |
277 | bfd_set_error (bfd_error_invalid_operation); | |
278 | return -1; | |
279 | } | |
280 | ||
281 | nwrote = abfd->iovec->bwrite (abfd, ptr, size); | |
282 | if (nwrote != -1) | |
93509525 | 283 | abfd->where += nwrote; |
5c4ce239 | 284 | if ((bfd_size_type) nwrote != size) |
93509525 KD |
285 | { |
286 | #ifdef ENOSPC | |
287 | errno = ENOSPC; | |
288 | #endif | |
289 | bfd_set_error (bfd_error_system_call); | |
290 | } | |
291 | return nwrote; | |
292 | } | |
293 | ||
7c192733 | 294 | file_ptr |
c58b9523 | 295 | bfd_tell (bfd *abfd) |
93509525 | 296 | { |
5c4ce239 | 297 | ufile_ptr offset = 0; |
93509525 KD |
298 | file_ptr ptr; |
299 | ||
5c4ce239 AM |
300 | while (abfd->my_archive != NULL |
301 | && !bfd_is_thin_archive (abfd->my_archive)) | |
69fd4758 | 302 | { |
5c4ce239 AM |
303 | offset += abfd->origin; |
304 | abfd = abfd->my_archive; | |
69fd4758 | 305 | } |
4d095f5b | 306 | offset += abfd->origin; |
93509525 | 307 | |
5c4ce239 AM |
308 | if (abfd->iovec == NULL) |
309 | return 0; | |
310 | ||
311 | ptr = abfd->iovec->btell (abfd); | |
93509525 | 312 | abfd->where = ptr; |
5c4ce239 | 313 | return ptr - offset; |
93509525 KD |
314 | } |
315 | ||
316 | int | |
c58b9523 | 317 | bfd_flush (bfd *abfd) |
93509525 | 318 | { |
5c4ce239 AM |
319 | while (abfd->my_archive != NULL |
320 | && !bfd_is_thin_archive (abfd->my_archive)) | |
321 | abfd = abfd->my_archive; | |
322 | ||
323 | if (abfd->iovec == NULL) | |
324 | return 0; | |
325 | ||
326 | return abfd->iovec->bflush (abfd); | |
93509525 KD |
327 | } |
328 | ||
329 | /* Returns 0 for success, negative value for failure (in which case | |
330 | bfd_get_error can retrieve the error code). */ | |
331 | int | |
c58b9523 | 332 | bfd_stat (bfd *abfd, struct stat *statbuf) |
93509525 | 333 | { |
93509525 KD |
334 | int result; |
335 | ||
5c4ce239 AM |
336 | while (abfd->my_archive != NULL |
337 | && !bfd_is_thin_archive (abfd->my_archive)) | |
338 | abfd = abfd->my_archive; | |
69fd4758 | 339 | |
5c4ce239 AM |
340 | if (abfd->iovec == NULL) |
341 | { | |
342 | bfd_set_error (bfd_error_invalid_operation); | |
343 | return -1; | |
344 | } | |
345 | ||
346 | result = abfd->iovec->bstat (abfd, statbuf); | |
93509525 KD |
347 | if (result < 0) |
348 | bfd_set_error (bfd_error_system_call); | |
349 | return result; | |
350 | } | |
351 | ||
352 | /* Returns 0 for success, nonzero for failure (in which case bfd_get_error | |
353 | can retrieve the error code). */ | |
354 | ||
355 | int | |
c58b9523 | 356 | bfd_seek (bfd *abfd, file_ptr position, int direction) |
93509525 KD |
357 | { |
358 | int result; | |
5c4ce239 | 359 | ufile_ptr offset = 0; |
93509525 | 360 | |
5c4ce239 AM |
361 | while (abfd->my_archive != NULL |
362 | && !bfd_is_thin_archive (abfd->my_archive)) | |
93509525 | 363 | { |
5c4ce239 AM |
364 | offset += abfd->origin; |
365 | abfd = abfd->my_archive; | |
93509525 | 366 | } |
4d095f5b | 367 | offset += abfd->origin; |
93509525 | 368 | |
5c4ce239 | 369 | if (abfd->iovec == NULL) |
660722b0 | 370 | { |
5c4ce239 AM |
371 | bfd_set_error (bfd_error_invalid_operation); |
372 | return -1; | |
660722b0 | 373 | } |
93509525 | 374 | |
5c4ce239 AM |
375 | /* For the time being, a BFD may not seek to it's end. The problem |
376 | is that we don't easily have a way to recognize the end of an | |
377 | element in an archive. */ | |
378 | BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR); | |
379 | ||
380 | if (direction != SEEK_CUR) | |
381 | position += offset; | |
69fd4758 | 382 | |
ff91d2f0 AM |
383 | if ((direction == SEEK_CUR && position == 0) |
384 | || (direction == SEEK_SET && (ufile_ptr) position == abfd->where)) | |
385 | return 0; | |
386 | ||
5c4ce239 | 387 | result = abfd->iovec->bseek (abfd, position, direction); |
93509525 KD |
388 | if (result != 0) |
389 | { | |
93509525 | 390 | /* An EINVAL error probably means that the file offset was |
07d6d2b8 | 391 | absurd. */ |
5c4ce239 | 392 | if (errno == EINVAL) |
93509525 KD |
393 | bfd_set_error (bfd_error_file_truncated); |
394 | else | |
5c4ce239 | 395 | bfd_set_error (bfd_error_system_call); |
93509525 KD |
396 | } |
397 | else | |
398 | { | |
399 | /* Adjust `where' field. */ | |
5c4ce239 | 400 | if (direction == SEEK_CUR) |
93509525 | 401 | abfd->where += position; |
5c4ce239 AM |
402 | else |
403 | abfd->where = position; | |
93509525 | 404 | } |
5c4ce239 | 405 | |
93509525 KD |
406 | return result; |
407 | } | |
408 | ||
409 | /* | |
410 | FUNCTION | |
411 | bfd_get_mtime | |
412 | ||
413 | SYNOPSIS | |
c58b9523 | 414 | long bfd_get_mtime (bfd *abfd); |
93509525 KD |
415 | |
416 | DESCRIPTION | |
417 | Return the file modification time (as read from the file system, or | |
418 | from the archive header for archive members). | |
419 | ||
420 | */ | |
421 | ||
422 | long | |
c58b9523 | 423 | bfd_get_mtime (bfd *abfd) |
93509525 | 424 | { |
93509525 KD |
425 | struct stat buf; |
426 | ||
427 | if (abfd->mtime_set) | |
428 | return abfd->mtime; | |
429 | ||
5c4ce239 | 430 | if (bfd_stat (abfd, &buf) != 0) |
93509525 KD |
431 | return 0; |
432 | ||
433 | abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */ | |
434 | return buf.st_mtime; | |
435 | } | |
436 | ||
437 | /* | |
438 | FUNCTION | |
439 | bfd_get_size | |
440 | ||
441 | SYNOPSIS | |
47fdcf63 | 442 | ufile_ptr bfd_get_size (bfd *abfd); |
93509525 KD |
443 | |
444 | DESCRIPTION | |
445 | Return the file size (as read from file system) for the file | |
446 | associated with BFD @var{abfd}. | |
447 | ||
448 | The initial motivation for, and use of, this routine is not | |
449 | so we can get the exact size of the object the BFD applies to, since | |
450 | that might not be generally possible (archive members for example). | |
451 | It would be ideal if someone could eventually modify | |
452 | it so that such results were guaranteed. | |
453 | ||
454 | Instead, we want to ask questions like "is this NNN byte sized | |
455 | object I'm about to try read from file offset YYY reasonable?" | |
456 | As as example of where we might do this, some object formats | |
457 | use string tables for which the first <<sizeof (long)>> bytes of the | |
458 | table contain the size of the table itself, including the size bytes. | |
459 | If an application tries to read what it thinks is one of these | |
460 | string tables, without some way to validate the size, and for | |
461 | some reason the size is wrong (byte swapping error, wrong location | |
462 | for the string table, etc.), the only clue is likely to be a read | |
463 | error when it tries to read the table, or a "virtual memory | |
464 | exhausted" error when it tries to allocate 15 bazillon bytes | |
465 | of space for the 15 bazillon byte table it is about to read. | |
5c4491d3 | 466 | This function at least allows us to answer the question, "is the |
93509525 | 467 | size reasonable?". |
b03202e3 AM |
468 | |
469 | A return value of zero indicates the file size is unknown. | |
93509525 KD |
470 | */ |
471 | ||
47fdcf63 | 472 | ufile_ptr |
c58b9523 | 473 | bfd_get_size (bfd *abfd) |
93509525 | 474 | { |
b03202e3 AM |
475 | /* A size of 0 means we haven't yet called bfd_stat. A size of 1 |
476 | means we have a cached value of 0, ie. unknown. */ | |
477 | if (abfd->size <= 1 || bfd_write_p (abfd)) | |
478 | { | |
479 | struct stat buf; | |
93509525 | 480 | |
b03202e3 AM |
481 | if (abfd->size == 1 && !bfd_write_p (abfd)) |
482 | return 0; | |
93509525 | 483 | |
b03202e3 AM |
484 | if (bfd_stat (abfd, &buf) != 0 |
485 | || buf.st_size == 0 | |
486 | || buf.st_size - (ufile_ptr) buf.st_size != 0) | |
487 | { | |
488 | abfd->size = 1; | |
489 | return 0; | |
490 | } | |
491 | abfd->size = buf.st_size; | |
492 | } | |
493 | return abfd->size; | |
93509525 | 494 | } |
25b88f33 | 495 | |
8e2f54bc L |
496 | /* |
497 | FUNCTION | |
498 | bfd_get_file_size | |
499 | ||
500 | SYNOPSIS | |
47fdcf63 | 501 | ufile_ptr bfd_get_file_size (bfd *abfd); |
8e2f54bc L |
502 | |
503 | DESCRIPTION | |
504 | Return the file size (as read from file system) for the file | |
505 | associated with BFD @var{abfd}. It supports both normal files | |
506 | and archive elements. | |
507 | ||
508 | */ | |
509 | ||
47fdcf63 | 510 | ufile_ptr |
8e2f54bc L |
511 | bfd_get_file_size (bfd *abfd) |
512 | { | |
b570b954 AM |
513 | ufile_ptr file_size, archive_size = (ufile_ptr) -1; |
514 | ||
8e2f54bc L |
515 | if (abfd->my_archive != NULL |
516 | && !bfd_is_thin_archive (abfd->my_archive)) | |
b570b954 AM |
517 | { |
518 | struct areltdata *adata = (struct areltdata *) abfd->arelt_data; | |
c01de193 AM |
519 | if (adata != NULL) |
520 | { | |
521 | archive_size = adata->parsed_size; | |
522 | /* If the archive is compressed we can't compare against | |
523 | file size. */ | |
524 | if (adata->arch_header != NULL | |
525 | && memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag, | |
526 | "Z\012", 2) == 0) | |
527 | return archive_size; | |
528 | abfd = abfd->my_archive; | |
529 | } | |
b570b954 | 530 | } |
8e2f54bc | 531 | |
b570b954 AM |
532 | file_size = bfd_get_size (abfd); |
533 | if (archive_size < file_size) | |
534 | return archive_size; | |
535 | return file_size; | |
8e2f54bc | 536 | } |
25b88f33 PP |
537 | |
538 | /* | |
539 | FUNCTION | |
540 | bfd_mmap | |
541 | ||
542 | SYNOPSIS | |
543 | void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, | |
07d6d2b8 AM |
544 | int prot, int flags, file_ptr offset, |
545 | void **map_addr, bfd_size_type *map_len); | |
25b88f33 PP |
546 | |
547 | DESCRIPTION | |
548 | Return mmap()ed region of the file, if possible and implemented. | |
07d6d2b8 AM |
549 | LEN and OFFSET do not need to be page aligned. The page aligned |
550 | address and length are written to MAP_ADDR and MAP_LEN. | |
25b88f33 PP |
551 | |
552 | */ | |
553 | ||
554 | void * | |
555 | bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, | |
4c95ab76 | 556 | int prot, int flags, file_ptr offset, |
07d6d2b8 | 557 | void **map_addr, bfd_size_type *map_len) |
25b88f33 | 558 | { |
5c4ce239 AM |
559 | while (abfd->my_archive != NULL |
560 | && !bfd_is_thin_archive (abfd->my_archive)) | |
561 | { | |
562 | offset += abfd->origin; | |
563 | abfd = abfd->my_archive; | |
564 | } | |
4d095f5b | 565 | offset += abfd->origin; |
25b88f33 PP |
566 | |
567 | if (abfd->iovec == NULL) | |
5c4ce239 AM |
568 | { |
569 | bfd_set_error (bfd_error_invalid_operation); | |
570 | return (void *) -1; | |
571 | } | |
25b88f33 | 572 | |
4c95ab76 | 573 | return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset, |
07d6d2b8 | 574 | map_addr, map_len); |
25b88f33 | 575 | } |
65077aa8 TG |
576 | |
577 | /* Memory file I/O operations. */ | |
578 | ||
579 | static file_ptr | |
580 | memory_bread (bfd *abfd, void *ptr, file_ptr size) | |
581 | { | |
582 | struct bfd_in_memory *bim; | |
583 | bfd_size_type get; | |
584 | ||
585 | bim = (struct bfd_in_memory *) abfd->iostream; | |
586 | get = size; | |
587 | if (abfd->where + get > bim->size) | |
588 | { | |
589 | if (bim->size < (bfd_size_type) abfd->where) | |
07d6d2b8 | 590 | get = 0; |
65077aa8 | 591 | else |
07d6d2b8 | 592 | get = bim->size - abfd->where; |
65077aa8 TG |
593 | bfd_set_error (bfd_error_file_truncated); |
594 | } | |
595 | memcpy (ptr, bim->buffer + abfd->where, (size_t) get); | |
596 | return get; | |
597 | } | |
598 | ||
599 | static file_ptr | |
600 | memory_bwrite (bfd *abfd, const void *ptr, file_ptr size) | |
601 | { | |
602 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
603 | ||
604 | if (abfd->where + size > bim->size) | |
605 | { | |
606 | bfd_size_type newsize, oldsize; | |
607 | ||
608 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
609 | bim->size = abfd->where + size; | |
610 | /* Round up to cut down on memory fragmentation */ | |
611 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
612 | if (newsize > oldsize) | |
07d6d2b8 AM |
613 | { |
614 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); | |
615 | if (bim->buffer == NULL) | |
616 | { | |
617 | bim->size = 0; | |
618 | return 0; | |
619 | } | |
620 | if (newsize > bim->size) | |
621 | memset (bim->buffer + bim->size, 0, newsize - bim->size); | |
622 | } | |
65077aa8 TG |
623 | } |
624 | memcpy (bim->buffer + abfd->where, ptr, (size_t) size); | |
625 | return size; | |
626 | } | |
627 | ||
628 | static file_ptr | |
629 | memory_btell (bfd *abfd) | |
630 | { | |
631 | return abfd->where; | |
632 | } | |
633 | ||
634 | static int | |
635 | memory_bseek (bfd *abfd, file_ptr position, int direction) | |
636 | { | |
637 | file_ptr nwhere; | |
638 | struct bfd_in_memory *bim; | |
639 | ||
640 | bim = (struct bfd_in_memory *) abfd->iostream; | |
641 | ||
642 | if (direction == SEEK_SET) | |
643 | nwhere = position; | |
644 | else | |
645 | nwhere = abfd->where + position; | |
646 | ||
647 | if (nwhere < 0) | |
648 | { | |
649 | abfd->where = 0; | |
650 | errno = EINVAL; | |
651 | return -1; | |
652 | } | |
653 | ||
654 | if ((bfd_size_type)nwhere > bim->size) | |
655 | { | |
656 | if (abfd->direction == write_direction | |
07d6d2b8 AM |
657 | || abfd->direction == both_direction) |
658 | { | |
659 | bfd_size_type newsize, oldsize; | |
660 | ||
661 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
662 | bim->size = nwhere; | |
663 | /* Round up to cut down on memory fragmentation */ | |
664 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
665 | if (newsize > oldsize) | |
666 | { | |
667 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); | |
668 | if (bim->buffer == NULL) | |
669 | { | |
670 | errno = EINVAL; | |
671 | bim->size = 0; | |
672 | return -1; | |
673 | } | |
674 | memset (bim->buffer + oldsize, 0, newsize - oldsize); | |
675 | } | |
676 | } | |
65077aa8 | 677 | else |
07d6d2b8 AM |
678 | { |
679 | abfd->where = bim->size; | |
680 | errno = EINVAL; | |
681 | bfd_set_error (bfd_error_file_truncated); | |
682 | return -1; | |
683 | } | |
65077aa8 TG |
684 | } |
685 | return 0; | |
686 | } | |
687 | ||
405bf443 | 688 | static int |
65077aa8 TG |
689 | memory_bclose (struct bfd *abfd) |
690 | { | |
691 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
692 | ||
c9594989 | 693 | free (bim->buffer); |
65077aa8 TG |
694 | free (bim); |
695 | abfd->iostream = NULL; | |
696 | ||
405bf443 | 697 | return 0; |
65077aa8 TG |
698 | } |
699 | ||
700 | static int | |
701 | memory_bflush (bfd *abfd ATTRIBUTE_UNUSED) | |
702 | { | |
703 | return 0; | |
704 | } | |
705 | ||
706 | static int | |
707 | memory_bstat (bfd *abfd, struct stat *statbuf) | |
708 | { | |
709 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
710 | ||
b5dee4ea | 711 | memset (statbuf, 0, sizeof (*statbuf)); |
65077aa8 TG |
712 | statbuf->st_size = bim->size; |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | static void * | |
718 | memory_bmmap (bfd *abfd ATTRIBUTE_UNUSED, void *addr ATTRIBUTE_UNUSED, | |
07d6d2b8 AM |
719 | bfd_size_type len ATTRIBUTE_UNUSED, int prot ATTRIBUTE_UNUSED, |
720 | int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED, | |
721 | void **map_addr ATTRIBUTE_UNUSED, | |
722 | bfd_size_type *map_len ATTRIBUTE_UNUSED) | |
65077aa8 TG |
723 | { |
724 | return (void *)-1; | |
725 | } | |
726 | ||
727 | const struct bfd_iovec _bfd_memory_iovec = | |
728 | { | |
729 | &memory_bread, &memory_bwrite, &memory_btell, &memory_bseek, | |
730 | &memory_bclose, &memory_bflush, &memory_bstat, &memory_bmmap | |
731 | }; |