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Commit | Line | Data |
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93509525 | 1 | /* Low-level I/O routines for BFDs. |
7c192733 | 2 | |
d87bef3a | 3 | Copyright (C) 1990-2023 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> | |
68e80d96 | 31 | #include <locale.h> |
0b8448af | 32 | #endif |
93509525 | 33 | |
93509525 KD |
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 | ||
428b207a TT |
44 | #ifndef FD_CLOEXEC |
45 | #define FD_CLOEXEC 1 | |
46 | #endif | |
47 | ||
7c192733 | 48 | file_ptr |
c7c3d11b | 49 | _bfd_real_ftell (FILE *file) |
7c192733 AC |
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 | |
c7c3d11b | 61 | _bfd_real_fseek (FILE *file, file_ptr offset, int whence) |
7c192733 AC |
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 | ||
428b207a TT |
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 | ||
2e6f4fae | 89 | FILE * |
c7c3d11b | 90 | _bfd_real_fopen (const char *filename, const char *modes) |
2e6f4fae | 91 | { |
d387240a | 92 | #ifdef VMS |
d387240a TG |
93 | char *vms_attr; |
94 | ||
9aff4b7a | 95 | /* On VMS, fopen allows file attributes as optional arguments. |
d387240a TG |
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, ','); | |
0b8448af | 100 | if (vms_attr != NULL) |
d387240a | 101 | { |
0c376465 TG |
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])); | |
d387240a | 117 | } |
0b8448af NC |
118 | |
119 | #elif defined (_WIN32) | |
ba0eb22c NC |
120 | /* PR 25713: Handle extra long path names possibly containing '..' and '.'. */ |
121 | wchar_t ** lpFilePart = {NULL}; | |
122 | const wchar_t prefix[] = L"\\\\?\\"; | |
ba0eb22c | 123 | const size_t partPathLen = strlen (filename) + 1; |
68e80d96 | 124 | #ifdef __MINGW32__ |
9d099144 AM |
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 (); | |
68e80d96 CC |
130 | #else |
131 | const unsigned int cp = CP_UTF8; | |
132 | #endif | |
17d60030 | 133 | |
cb7da2a6 | 134 | /* Converting the partial path from ascii to unicode. |
ba0eb22c NC |
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. */ | |
68e80d96 | 137 | size_t partPathWSize = MultiByteToWideChar (cp, 0, filename, -1, NULL, 0); |
ba0eb22c NC |
138 | wchar_t * partPath = calloc (partPathWSize, sizeof(wchar_t)); |
139 | size_t ix; | |
17d60030 | 140 | |
68e80d96 | 141 | MultiByteToWideChar (cp, 0, filename, -1, partPath, partPathWSize); |
17d60030 | 142 | |
cb7da2a6 | 143 | /* Convert any UNIX style path separators into the DOS i.e. backslash separator. */ |
cb7da2a6 TS |
144 | for (ix = 0; ix < partPathLen; ix++) |
145 | if (IS_UNIX_DIR_SEPARATOR(filename[ix])) | |
146 | partPath[ix] = '\\'; | |
0b8448af | 147 | |
cb7da2a6 | 148 | /* Getting the full path from the provided partial path. |
ba0eb22c NC |
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)); | |
cb7da2a6 TS |
153 | |
154 | wcscpy (fullPath, prefix); | |
ba0eb22c NC |
155 | |
156 | int prefixLen = sizeof(prefix) / sizeof(wchar_t); | |
157 | wchar_t * fullPathOffset = fullPath + prefixLen - 1; | |
158 | ||
cb7da2a6 TS |
159 | GetFullPathNameW (partPath, fullPathWSize, fullPathOffset, lpFilePart); |
160 | free (partPath); | |
161 | ||
162 | /* It is non-standard for modes to exceed 16 characters. */ | |
5f3fc928 | 163 | wchar_t modesW[16]; |
ba0eb22c | 164 | |
68e80d96 | 165 | MultiByteToWideChar (cp, 0, modes, -1, modesW, sizeof(modesW)); |
cb7da2a6 | 166 | |
ba0eb22c | 167 | FILE * file = _wfopen (fullPath, modesW); |
cb7da2a6 TS |
168 | free (fullPath); |
169 | ||
170 | return close_on_exec (file); | |
0b8448af NC |
171 | |
172 | #elif defined (HAVE_FOPEN64) | |
428b207a | 173 | return close_on_exec (fopen64 (filename, modes)); |
0b8448af | 174 | |
cb7da2a6 | 175 | #else |
0b8448af | 176 | return close_on_exec (fopen (filename, modes)); |
cb7da2a6 | 177 | #endif |
2e6f4fae DJ |
178 | } |
179 | ||
40838a72 AC |
180 | /* |
181 | INTERNAL_DEFINITION | |
182 | struct bfd_iovec | |
93509525 | 183 | |
40838a72 | 184 | DESCRIPTION |
93509525 | 185 | |
40838a72 AC |
186 | The <<struct bfd_iovec>> contains the internal file I/O class. |
187 | Each <<BFD>> has an instance of this class and all file I/O is | |
188 | routed through it (it is assumed that the instance implements | |
189 | all methods listed below). | |
190 | ||
191 | .struct bfd_iovec | |
192 | .{ | |
193 | . {* To avoid problems with macros, a "b" rather than "f" | |
194 | . prefix is prepended to each method name. *} | |
195 | . {* Attempt to read/write NBYTES on ABFD's IOSTREAM storing/fetching | |
196 | . bytes starting at PTR. Return the number of bytes actually | |
197 | . transfered (a read past end-of-file returns less than NBYTES), | |
198 | . or -1 (setting <<bfd_error>>) if an error occurs. *} | |
199 | . file_ptr (*bread) (struct bfd *abfd, void *ptr, file_ptr nbytes); | |
200 | . file_ptr (*bwrite) (struct bfd *abfd, const void *ptr, | |
07d6d2b8 | 201 | . file_ptr nbytes); |
40838a72 AC |
202 | . {* Return the current IOSTREAM file offset, or -1 (setting <<bfd_error>> |
203 | . if an error occurs. *} | |
204 | . file_ptr (*btell) (struct bfd *abfd); | |
205 | . {* For the following, on successful completion a value of 0 is returned. | |
07d6d2b8 | 206 | . Otherwise, a value of -1 is returned (and <<bfd_error>> is set). *} |
40838a72 | 207 | . int (*bseek) (struct bfd *abfd, file_ptr offset, int whence); |
405bf443 | 208 | . int (*bclose) (struct bfd *abfd); |
40838a72 AC |
209 | . int (*bflush) (struct bfd *abfd); |
210 | . int (*bstat) (struct bfd *abfd, struct stat *sb); | |
4c95ab76 TG |
211 | . {* Mmap a part of the files. ADDR, LEN, PROT, FLAGS and OFFSET are the usual |
212 | . mmap parameter, except that LEN and OFFSET do not need to be page | |
213 | . aligned. Returns (void *)-1 on failure, mmapped address on success. | |
214 | . Also write in MAP_ADDR the address of the page aligned buffer and in | |
215 | . MAP_LEN the size mapped (a page multiple). Use unmap with MAP_ADDR and | |
216 | . MAP_LEN to unmap. *} | |
f07749bb | 217 | . void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len, |
07d6d2b8 AM |
218 | . int prot, int flags, file_ptr offset, |
219 | . void **map_addr, bfd_size_type *map_len); | |
40838a72 | 220 | .}; |
93509525 | 221 | |
65077aa8 TG |
222 | .extern const struct bfd_iovec _bfd_memory_iovec; |
223 | ||
40838a72 | 224 | */ |
93509525 | 225 | |
93509525 KD |
226 | |
227 | /* Return value is amount read. */ | |
228 | ||
229 | bfd_size_type | |
c58b9523 | 230 | bfd_bread (void *ptr, bfd_size_type size, bfd *abfd) |
93509525 | 231 | { |
5c4ce239 AM |
232 | file_ptr nread; |
233 | bfd *element_bfd = abfd; | |
234 | ufile_ptr offset = 0; | |
235 | ||
236 | while (abfd->my_archive != NULL | |
237 | && !bfd_is_thin_archive (abfd->my_archive)) | |
238 | { | |
239 | offset += abfd->origin; | |
240 | abfd = abfd->my_archive; | |
241 | } | |
4d095f5b | 242 | offset += abfd->origin; |
93509525 | 243 | |
c17eb63b | 244 | /* If this is a non-thin archive element, don't read past the end of |
1fb41da4 | 245 | this element. */ |
c17eb63b L |
246 | if (element_bfd->arelt_data != NULL |
247 | && element_bfd->my_archive != NULL | |
248 | && !bfd_is_thin_archive (element_bfd->my_archive)) | |
1fb41da4 | 249 | { |
5c4ce239 | 250 | bfd_size_type maxbytes = arelt_size (element_bfd); |
f1bb16f8 | 251 | |
5c4ce239 | 252 | if (abfd->where < offset || abfd->where - offset >= maxbytes) |
07d6d2b8 | 253 | { |
5c4ce239 AM |
254 | bfd_set_error (bfd_error_invalid_operation); |
255 | return -1; | |
07d6d2b8 | 256 | } |
5c4ce239 AM |
257 | if (abfd->where - offset + size > maxbytes) |
258 | size = maxbytes - (abfd->where - offset); | |
1fb41da4 AM |
259 | } |
260 | ||
5c4ce239 AM |
261 | if (abfd->iovec == NULL) |
262 | { | |
263 | bfd_set_error (bfd_error_invalid_operation); | |
264 | return -1; | |
265 | } | |
266 | ||
267 | nread = abfd->iovec->bread (abfd, ptr, size); | |
268 | if (nread != -1) | |
93509525 KD |
269 | abfd->where += nread; |
270 | ||
93509525 KD |
271 | return nread; |
272 | } | |
273 | ||
274 | bfd_size_type | |
c58b9523 | 275 | bfd_bwrite (const void *ptr, bfd_size_type size, bfd *abfd) |
93509525 | 276 | { |
5c4ce239 | 277 | file_ptr nwrote; |
93509525 | 278 | |
5c4ce239 AM |
279 | while (abfd->my_archive != NULL |
280 | && !bfd_is_thin_archive (abfd->my_archive)) | |
281 | abfd = abfd->my_archive; | |
69fd4758 | 282 | |
5c4ce239 AM |
283 | if (abfd->iovec == NULL) |
284 | { | |
285 | bfd_set_error (bfd_error_invalid_operation); | |
286 | return -1; | |
287 | } | |
288 | ||
289 | nwrote = abfd->iovec->bwrite (abfd, ptr, size); | |
290 | if (nwrote != -1) | |
93509525 | 291 | abfd->where += nwrote; |
5c4ce239 | 292 | if ((bfd_size_type) nwrote != size) |
93509525 KD |
293 | { |
294 | #ifdef ENOSPC | |
295 | errno = ENOSPC; | |
296 | #endif | |
297 | bfd_set_error (bfd_error_system_call); | |
298 | } | |
299 | return nwrote; | |
300 | } | |
301 | ||
7c192733 | 302 | file_ptr |
c58b9523 | 303 | bfd_tell (bfd *abfd) |
93509525 | 304 | { |
5c4ce239 | 305 | ufile_ptr offset = 0; |
93509525 KD |
306 | file_ptr ptr; |
307 | ||
5c4ce239 AM |
308 | while (abfd->my_archive != NULL |
309 | && !bfd_is_thin_archive (abfd->my_archive)) | |
69fd4758 | 310 | { |
5c4ce239 AM |
311 | offset += abfd->origin; |
312 | abfd = abfd->my_archive; | |
69fd4758 | 313 | } |
4d095f5b | 314 | offset += abfd->origin; |
93509525 | 315 | |
5c4ce239 AM |
316 | if (abfd->iovec == NULL) |
317 | return 0; | |
318 | ||
319 | ptr = abfd->iovec->btell (abfd); | |
93509525 | 320 | abfd->where = ptr; |
5c4ce239 | 321 | return ptr - offset; |
93509525 KD |
322 | } |
323 | ||
324 | int | |
c58b9523 | 325 | bfd_flush (bfd *abfd) |
93509525 | 326 | { |
5c4ce239 AM |
327 | while (abfd->my_archive != NULL |
328 | && !bfd_is_thin_archive (abfd->my_archive)) | |
329 | abfd = abfd->my_archive; | |
330 | ||
331 | if (abfd->iovec == NULL) | |
332 | return 0; | |
333 | ||
334 | return abfd->iovec->bflush (abfd); | |
93509525 KD |
335 | } |
336 | ||
337 | /* Returns 0 for success, negative value for failure (in which case | |
338 | bfd_get_error can retrieve the error code). */ | |
339 | int | |
c58b9523 | 340 | bfd_stat (bfd *abfd, struct stat *statbuf) |
93509525 | 341 | { |
93509525 KD |
342 | int result; |
343 | ||
5c4ce239 AM |
344 | while (abfd->my_archive != NULL |
345 | && !bfd_is_thin_archive (abfd->my_archive)) | |
346 | abfd = abfd->my_archive; | |
69fd4758 | 347 | |
5c4ce239 AM |
348 | if (abfd->iovec == NULL) |
349 | { | |
350 | bfd_set_error (bfd_error_invalid_operation); | |
351 | return -1; | |
352 | } | |
353 | ||
354 | result = abfd->iovec->bstat (abfd, statbuf); | |
93509525 KD |
355 | if (result < 0) |
356 | bfd_set_error (bfd_error_system_call); | |
357 | return result; | |
358 | } | |
359 | ||
360 | /* Returns 0 for success, nonzero for failure (in which case bfd_get_error | |
361 | can retrieve the error code). */ | |
362 | ||
363 | int | |
c58b9523 | 364 | bfd_seek (bfd *abfd, file_ptr position, int direction) |
93509525 KD |
365 | { |
366 | int result; | |
5c4ce239 | 367 | ufile_ptr offset = 0; |
93509525 | 368 | |
5c4ce239 AM |
369 | while (abfd->my_archive != NULL |
370 | && !bfd_is_thin_archive (abfd->my_archive)) | |
93509525 | 371 | { |
5c4ce239 AM |
372 | offset += abfd->origin; |
373 | abfd = abfd->my_archive; | |
93509525 | 374 | } |
4d095f5b | 375 | offset += abfd->origin; |
93509525 | 376 | |
5c4ce239 | 377 | if (abfd->iovec == NULL) |
660722b0 | 378 | { |
5c4ce239 AM |
379 | bfd_set_error (bfd_error_invalid_operation); |
380 | return -1; | |
660722b0 | 381 | } |
93509525 | 382 | |
5c4ce239 AM |
383 | /* For the time being, a BFD may not seek to it's end. The problem |
384 | is that we don't easily have a way to recognize the end of an | |
385 | element in an archive. */ | |
386 | BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR); | |
387 | ||
388 | if (direction != SEEK_CUR) | |
389 | position += offset; | |
69fd4758 | 390 | |
ff91d2f0 AM |
391 | if ((direction == SEEK_CUR && position == 0) |
392 | || (direction == SEEK_SET && (ufile_ptr) position == abfd->where)) | |
393 | return 0; | |
394 | ||
5c4ce239 | 395 | result = abfd->iovec->bseek (abfd, position, direction); |
93509525 KD |
396 | if (result != 0) |
397 | { | |
93509525 | 398 | /* An EINVAL error probably means that the file offset was |
07d6d2b8 | 399 | absurd. */ |
5c4ce239 | 400 | if (errno == EINVAL) |
93509525 KD |
401 | bfd_set_error (bfd_error_file_truncated); |
402 | else | |
5c4ce239 | 403 | bfd_set_error (bfd_error_system_call); |
93509525 KD |
404 | } |
405 | else | |
406 | { | |
407 | /* Adjust `where' field. */ | |
5c4ce239 | 408 | if (direction == SEEK_CUR) |
93509525 | 409 | abfd->where += position; |
5c4ce239 AM |
410 | else |
411 | abfd->where = position; | |
93509525 | 412 | } |
5c4ce239 | 413 | |
93509525 KD |
414 | return result; |
415 | } | |
416 | ||
417 | /* | |
418 | FUNCTION | |
419 | bfd_get_mtime | |
420 | ||
421 | SYNOPSIS | |
c58b9523 | 422 | long bfd_get_mtime (bfd *abfd); |
93509525 KD |
423 | |
424 | DESCRIPTION | |
425 | Return the file modification time (as read from the file system, or | |
426 | from the archive header for archive members). | |
427 | ||
428 | */ | |
429 | ||
430 | long | |
c58b9523 | 431 | bfd_get_mtime (bfd *abfd) |
93509525 | 432 | { |
93509525 KD |
433 | struct stat buf; |
434 | ||
435 | if (abfd->mtime_set) | |
436 | return abfd->mtime; | |
437 | ||
5c4ce239 | 438 | if (bfd_stat (abfd, &buf) != 0) |
93509525 KD |
439 | return 0; |
440 | ||
441 | abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */ | |
442 | return buf.st_mtime; | |
443 | } | |
444 | ||
445 | /* | |
446 | FUNCTION | |
447 | bfd_get_size | |
448 | ||
449 | SYNOPSIS | |
47fdcf63 | 450 | ufile_ptr bfd_get_size (bfd *abfd); |
93509525 KD |
451 | |
452 | DESCRIPTION | |
453 | Return the file size (as read from file system) for the file | |
454 | associated with BFD @var{abfd}. | |
455 | ||
456 | The initial motivation for, and use of, this routine is not | |
457 | so we can get the exact size of the object the BFD applies to, since | |
458 | that might not be generally possible (archive members for example). | |
459 | It would be ideal if someone could eventually modify | |
460 | it so that such results were guaranteed. | |
461 | ||
462 | Instead, we want to ask questions like "is this NNN byte sized | |
463 | object I'm about to try read from file offset YYY reasonable?" | |
464 | As as example of where we might do this, some object formats | |
465 | use string tables for which the first <<sizeof (long)>> bytes of the | |
466 | table contain the size of the table itself, including the size bytes. | |
467 | If an application tries to read what it thinks is one of these | |
468 | string tables, without some way to validate the size, and for | |
469 | some reason the size is wrong (byte swapping error, wrong location | |
470 | for the string table, etc.), the only clue is likely to be a read | |
471 | error when it tries to read the table, or a "virtual memory | |
472 | exhausted" error when it tries to allocate 15 bazillon bytes | |
473 | of space for the 15 bazillon byte table it is about to read. | |
5c4491d3 | 474 | This function at least allows us to answer the question, "is the |
93509525 | 475 | size reasonable?". |
b03202e3 AM |
476 | |
477 | A return value of zero indicates the file size is unknown. | |
93509525 KD |
478 | */ |
479 | ||
47fdcf63 | 480 | ufile_ptr |
c58b9523 | 481 | bfd_get_size (bfd *abfd) |
93509525 | 482 | { |
b03202e3 AM |
483 | /* A size of 0 means we haven't yet called bfd_stat. A size of 1 |
484 | means we have a cached value of 0, ie. unknown. */ | |
485 | if (abfd->size <= 1 || bfd_write_p (abfd)) | |
486 | { | |
487 | struct stat buf; | |
93509525 | 488 | |
b03202e3 AM |
489 | if (abfd->size == 1 && !bfd_write_p (abfd)) |
490 | return 0; | |
93509525 | 491 | |
b03202e3 AM |
492 | if (bfd_stat (abfd, &buf) != 0 |
493 | || buf.st_size == 0 | |
494 | || buf.st_size - (ufile_ptr) buf.st_size != 0) | |
495 | { | |
496 | abfd->size = 1; | |
497 | return 0; | |
498 | } | |
499 | abfd->size = buf.st_size; | |
500 | } | |
501 | return abfd->size; | |
93509525 | 502 | } |
25b88f33 | 503 | |
8e2f54bc L |
504 | /* |
505 | FUNCTION | |
506 | bfd_get_file_size | |
507 | ||
508 | SYNOPSIS | |
47fdcf63 | 509 | ufile_ptr bfd_get_file_size (bfd *abfd); |
8e2f54bc L |
510 | |
511 | DESCRIPTION | |
512 | Return the file size (as read from file system) for the file | |
513 | associated with BFD @var{abfd}. It supports both normal files | |
514 | and archive elements. | |
515 | ||
516 | */ | |
517 | ||
47fdcf63 | 518 | ufile_ptr |
8e2f54bc L |
519 | bfd_get_file_size (bfd *abfd) |
520 | { | |
b570b954 AM |
521 | ufile_ptr file_size, archive_size = (ufile_ptr) -1; |
522 | ||
8e2f54bc L |
523 | if (abfd->my_archive != NULL |
524 | && !bfd_is_thin_archive (abfd->my_archive)) | |
b570b954 AM |
525 | { |
526 | struct areltdata *adata = (struct areltdata *) abfd->arelt_data; | |
c01de193 AM |
527 | if (adata != NULL) |
528 | { | |
529 | archive_size = adata->parsed_size; | |
530 | /* If the archive is compressed we can't compare against | |
531 | file size. */ | |
532 | if (adata->arch_header != NULL | |
533 | && memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag, | |
534 | "Z\012", 2) == 0) | |
535 | return archive_size; | |
536 | abfd = abfd->my_archive; | |
537 | } | |
b570b954 | 538 | } |
8e2f54bc | 539 | |
b570b954 AM |
540 | file_size = bfd_get_size (abfd); |
541 | if (archive_size < file_size) | |
542 | return archive_size; | |
543 | return file_size; | |
8e2f54bc | 544 | } |
25b88f33 PP |
545 | |
546 | /* | |
547 | FUNCTION | |
548 | bfd_mmap | |
549 | ||
550 | SYNOPSIS | |
551 | void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, | |
07d6d2b8 AM |
552 | int prot, int flags, file_ptr offset, |
553 | void **map_addr, bfd_size_type *map_len); | |
25b88f33 PP |
554 | |
555 | DESCRIPTION | |
556 | Return mmap()ed region of the file, if possible and implemented. | |
07d6d2b8 AM |
557 | LEN and OFFSET do not need to be page aligned. The page aligned |
558 | address and length are written to MAP_ADDR and MAP_LEN. | |
25b88f33 PP |
559 | |
560 | */ | |
561 | ||
562 | void * | |
563 | bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, | |
4c95ab76 | 564 | int prot, int flags, file_ptr offset, |
07d6d2b8 | 565 | void **map_addr, bfd_size_type *map_len) |
25b88f33 | 566 | { |
5c4ce239 AM |
567 | while (abfd->my_archive != NULL |
568 | && !bfd_is_thin_archive (abfd->my_archive)) | |
569 | { | |
570 | offset += abfd->origin; | |
571 | abfd = abfd->my_archive; | |
572 | } | |
4d095f5b | 573 | offset += abfd->origin; |
25b88f33 PP |
574 | |
575 | if (abfd->iovec == NULL) | |
5c4ce239 AM |
576 | { |
577 | bfd_set_error (bfd_error_invalid_operation); | |
578 | return (void *) -1; | |
579 | } | |
25b88f33 | 580 | |
4c95ab76 | 581 | return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset, |
07d6d2b8 | 582 | map_addr, map_len); |
25b88f33 | 583 | } |
65077aa8 TG |
584 | |
585 | /* Memory file I/O operations. */ | |
586 | ||
587 | static file_ptr | |
588 | memory_bread (bfd *abfd, void *ptr, file_ptr size) | |
589 | { | |
590 | struct bfd_in_memory *bim; | |
591 | bfd_size_type get; | |
592 | ||
593 | bim = (struct bfd_in_memory *) abfd->iostream; | |
594 | get = size; | |
595 | if (abfd->where + get > bim->size) | |
596 | { | |
597 | if (bim->size < (bfd_size_type) abfd->where) | |
07d6d2b8 | 598 | get = 0; |
65077aa8 | 599 | else |
07d6d2b8 | 600 | get = bim->size - abfd->where; |
65077aa8 TG |
601 | bfd_set_error (bfd_error_file_truncated); |
602 | } | |
603 | memcpy (ptr, bim->buffer + abfd->where, (size_t) get); | |
604 | return get; | |
605 | } | |
606 | ||
607 | static file_ptr | |
608 | memory_bwrite (bfd *abfd, const void *ptr, file_ptr size) | |
609 | { | |
610 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
611 | ||
612 | if (abfd->where + size > bim->size) | |
613 | { | |
614 | bfd_size_type newsize, oldsize; | |
615 | ||
616 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
617 | bim->size = abfd->where + size; | |
618 | /* Round up to cut down on memory fragmentation */ | |
619 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
620 | if (newsize > oldsize) | |
07d6d2b8 AM |
621 | { |
622 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); | |
623 | if (bim->buffer == NULL) | |
624 | { | |
625 | bim->size = 0; | |
626 | return 0; | |
627 | } | |
628 | if (newsize > bim->size) | |
629 | memset (bim->buffer + bim->size, 0, newsize - bim->size); | |
630 | } | |
65077aa8 TG |
631 | } |
632 | memcpy (bim->buffer + abfd->where, ptr, (size_t) size); | |
633 | return size; | |
634 | } | |
635 | ||
636 | static file_ptr | |
637 | memory_btell (bfd *abfd) | |
638 | { | |
639 | return abfd->where; | |
640 | } | |
641 | ||
642 | static int | |
643 | memory_bseek (bfd *abfd, file_ptr position, int direction) | |
644 | { | |
645 | file_ptr nwhere; | |
646 | struct bfd_in_memory *bim; | |
647 | ||
648 | bim = (struct bfd_in_memory *) abfd->iostream; | |
649 | ||
650 | if (direction == SEEK_SET) | |
651 | nwhere = position; | |
652 | else | |
653 | nwhere = abfd->where + position; | |
654 | ||
655 | if (nwhere < 0) | |
656 | { | |
657 | abfd->where = 0; | |
658 | errno = EINVAL; | |
659 | return -1; | |
660 | } | |
661 | ||
662 | if ((bfd_size_type)nwhere > bim->size) | |
663 | { | |
664 | if (abfd->direction == write_direction | |
07d6d2b8 AM |
665 | || abfd->direction == both_direction) |
666 | { | |
667 | bfd_size_type newsize, oldsize; | |
668 | ||
669 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
670 | bim->size = nwhere; | |
671 | /* Round up to cut down on memory fragmentation */ | |
672 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
673 | if (newsize > oldsize) | |
674 | { | |
675 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); | |
676 | if (bim->buffer == NULL) | |
677 | { | |
678 | errno = EINVAL; | |
679 | bim->size = 0; | |
680 | return -1; | |
681 | } | |
682 | memset (bim->buffer + oldsize, 0, newsize - oldsize); | |
683 | } | |
684 | } | |
65077aa8 | 685 | else |
07d6d2b8 AM |
686 | { |
687 | abfd->where = bim->size; | |
688 | errno = EINVAL; | |
689 | bfd_set_error (bfd_error_file_truncated); | |
690 | return -1; | |
691 | } | |
65077aa8 TG |
692 | } |
693 | return 0; | |
694 | } | |
695 | ||
405bf443 | 696 | static int |
65077aa8 TG |
697 | memory_bclose (struct bfd *abfd) |
698 | { | |
699 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
700 | ||
c9594989 | 701 | free (bim->buffer); |
65077aa8 TG |
702 | free (bim); |
703 | abfd->iostream = NULL; | |
704 | ||
405bf443 | 705 | return 0; |
65077aa8 TG |
706 | } |
707 | ||
708 | static int | |
709 | memory_bflush (bfd *abfd ATTRIBUTE_UNUSED) | |
710 | { | |
711 | return 0; | |
712 | } | |
713 | ||
714 | static int | |
715 | memory_bstat (bfd *abfd, struct stat *statbuf) | |
716 | { | |
717 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
718 | ||
b5dee4ea | 719 | memset (statbuf, 0, sizeof (*statbuf)); |
65077aa8 TG |
720 | statbuf->st_size = bim->size; |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static void * | |
726 | memory_bmmap (bfd *abfd ATTRIBUTE_UNUSED, void *addr ATTRIBUTE_UNUSED, | |
07d6d2b8 AM |
727 | bfd_size_type len ATTRIBUTE_UNUSED, int prot ATTRIBUTE_UNUSED, |
728 | int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED, | |
729 | void **map_addr ATTRIBUTE_UNUSED, | |
730 | bfd_size_type *map_len ATTRIBUTE_UNUSED) | |
65077aa8 TG |
731 | { |
732 | return (void *)-1; | |
733 | } | |
734 | ||
735 | const struct bfd_iovec _bfd_memory_iovec = | |
736 | { | |
737 | &memory_bread, &memory_bwrite, &memory_btell, &memory_bseek, | |
738 | &memory_bclose, &memory_bflush, &memory_bstat, &memory_bmmap | |
739 | }; |