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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); | |
a8cf07d3 H |
157 | |
158 | /* Do not add a prefix to the null device. */ | |
159 | if (stricmp (filename, "nul") == 0) | |
160 | prefixLen = 1; | |
161 | ||
ba0eb22c NC |
162 | wchar_t * fullPathOffset = fullPath + prefixLen - 1; |
163 | ||
cb7da2a6 TS |
164 | GetFullPathNameW (partPath, fullPathWSize, fullPathOffset, lpFilePart); |
165 | free (partPath); | |
166 | ||
167 | /* It is non-standard for modes to exceed 16 characters. */ | |
5f3fc928 | 168 | wchar_t modesW[16]; |
ba0eb22c | 169 | |
68e80d96 | 170 | MultiByteToWideChar (cp, 0, modes, -1, modesW, sizeof(modesW)); |
cb7da2a6 | 171 | |
ba0eb22c | 172 | FILE * file = _wfopen (fullPath, modesW); |
cb7da2a6 TS |
173 | free (fullPath); |
174 | ||
175 | return close_on_exec (file); | |
0b8448af NC |
176 | |
177 | #elif defined (HAVE_FOPEN64) | |
428b207a | 178 | return close_on_exec (fopen64 (filename, modes)); |
0b8448af | 179 | |
cb7da2a6 | 180 | #else |
0b8448af | 181 | return close_on_exec (fopen (filename, modes)); |
cb7da2a6 | 182 | #endif |
2e6f4fae DJ |
183 | } |
184 | ||
40838a72 AC |
185 | /* |
186 | INTERNAL_DEFINITION | |
187 | struct bfd_iovec | |
93509525 | 188 | |
40838a72 | 189 | DESCRIPTION |
93509525 | 190 | |
40838a72 AC |
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, | |
07d6d2b8 | 206 | . file_ptr nbytes); |
40838a72 AC |
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. | |
07d6d2b8 | 211 | . Otherwise, a value of -1 is returned (and <<bfd_error>> is set). *} |
40838a72 | 212 | . int (*bseek) (struct bfd *abfd, file_ptr offset, int whence); |
405bf443 | 213 | . int (*bclose) (struct bfd *abfd); |
40838a72 AC |
214 | . int (*bflush) (struct bfd *abfd); |
215 | . int (*bstat) (struct bfd *abfd, struct stat *sb); | |
4c95ab76 TG |
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. *} | |
f07749bb | 222 | . void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len, |
07d6d2b8 AM |
223 | . int prot, int flags, file_ptr offset, |
224 | . void **map_addr, bfd_size_type *map_len); | |
40838a72 | 225 | .}; |
93509525 | 226 | |
65077aa8 TG |
227 | .extern const struct bfd_iovec _bfd_memory_iovec; |
228 | ||
40838a72 | 229 | */ |
93509525 | 230 | |
93509525 KD |
231 | |
232 | /* Return value is amount read. */ | |
233 | ||
234 | bfd_size_type | |
c58b9523 | 235 | bfd_bread (void *ptr, bfd_size_type size, bfd *abfd) |
93509525 | 236 | { |
5c4ce239 AM |
237 | file_ptr nread; |
238 | bfd *element_bfd = abfd; | |
239 | ufile_ptr offset = 0; | |
240 | ||
241 | while (abfd->my_archive != NULL | |
242 | && !bfd_is_thin_archive (abfd->my_archive)) | |
243 | { | |
244 | offset += abfd->origin; | |
245 | abfd = abfd->my_archive; | |
246 | } | |
4d095f5b | 247 | offset += abfd->origin; |
93509525 | 248 | |
c17eb63b | 249 | /* If this is a non-thin archive element, don't read past the end of |
1fb41da4 | 250 | this element. */ |
c17eb63b L |
251 | if (element_bfd->arelt_data != NULL |
252 | && element_bfd->my_archive != NULL | |
253 | && !bfd_is_thin_archive (element_bfd->my_archive)) | |
1fb41da4 | 254 | { |
5c4ce239 | 255 | bfd_size_type maxbytes = arelt_size (element_bfd); |
f1bb16f8 | 256 | |
5c4ce239 | 257 | if (abfd->where < offset || abfd->where - offset >= maxbytes) |
07d6d2b8 | 258 | { |
5c4ce239 AM |
259 | bfd_set_error (bfd_error_invalid_operation); |
260 | return -1; | |
07d6d2b8 | 261 | } |
5c4ce239 AM |
262 | if (abfd->where - offset + size > maxbytes) |
263 | size = maxbytes - (abfd->where - offset); | |
1fb41da4 AM |
264 | } |
265 | ||
5c4ce239 AM |
266 | if (abfd->iovec == NULL) |
267 | { | |
268 | bfd_set_error (bfd_error_invalid_operation); | |
269 | return -1; | |
270 | } | |
271 | ||
272 | nread = abfd->iovec->bread (abfd, ptr, size); | |
273 | if (nread != -1) | |
93509525 KD |
274 | abfd->where += nread; |
275 | ||
93509525 KD |
276 | return nread; |
277 | } | |
278 | ||
279 | bfd_size_type | |
c58b9523 | 280 | bfd_bwrite (const void *ptr, bfd_size_type size, bfd *abfd) |
93509525 | 281 | { |
5c4ce239 | 282 | file_ptr nwrote; |
93509525 | 283 | |
5c4ce239 AM |
284 | while (abfd->my_archive != NULL |
285 | && !bfd_is_thin_archive (abfd->my_archive)) | |
286 | abfd = abfd->my_archive; | |
69fd4758 | 287 | |
5c4ce239 AM |
288 | if (abfd->iovec == NULL) |
289 | { | |
290 | bfd_set_error (bfd_error_invalid_operation); | |
291 | return -1; | |
292 | } | |
293 | ||
294 | nwrote = abfd->iovec->bwrite (abfd, ptr, size); | |
295 | if (nwrote != -1) | |
93509525 | 296 | abfd->where += nwrote; |
5c4ce239 | 297 | if ((bfd_size_type) nwrote != size) |
93509525 KD |
298 | { |
299 | #ifdef ENOSPC | |
300 | errno = ENOSPC; | |
301 | #endif | |
302 | bfd_set_error (bfd_error_system_call); | |
303 | } | |
304 | return nwrote; | |
305 | } | |
306 | ||
7c192733 | 307 | file_ptr |
c58b9523 | 308 | bfd_tell (bfd *abfd) |
93509525 | 309 | { |
5c4ce239 | 310 | ufile_ptr offset = 0; |
93509525 KD |
311 | file_ptr ptr; |
312 | ||
5c4ce239 AM |
313 | while (abfd->my_archive != NULL |
314 | && !bfd_is_thin_archive (abfd->my_archive)) | |
69fd4758 | 315 | { |
5c4ce239 AM |
316 | offset += abfd->origin; |
317 | abfd = abfd->my_archive; | |
69fd4758 | 318 | } |
4d095f5b | 319 | offset += abfd->origin; |
93509525 | 320 | |
5c4ce239 AM |
321 | if (abfd->iovec == NULL) |
322 | return 0; | |
323 | ||
324 | ptr = abfd->iovec->btell (abfd); | |
93509525 | 325 | abfd->where = ptr; |
5c4ce239 | 326 | return ptr - offset; |
93509525 KD |
327 | } |
328 | ||
329 | int | |
c58b9523 | 330 | bfd_flush (bfd *abfd) |
93509525 | 331 | { |
5c4ce239 AM |
332 | while (abfd->my_archive != NULL |
333 | && !bfd_is_thin_archive (abfd->my_archive)) | |
334 | abfd = abfd->my_archive; | |
335 | ||
336 | if (abfd->iovec == NULL) | |
337 | return 0; | |
338 | ||
339 | return abfd->iovec->bflush (abfd); | |
93509525 KD |
340 | } |
341 | ||
342 | /* Returns 0 for success, negative value for failure (in which case | |
343 | bfd_get_error can retrieve the error code). */ | |
344 | int | |
c58b9523 | 345 | bfd_stat (bfd *abfd, struct stat *statbuf) |
93509525 | 346 | { |
93509525 KD |
347 | int result; |
348 | ||
5c4ce239 AM |
349 | while (abfd->my_archive != NULL |
350 | && !bfd_is_thin_archive (abfd->my_archive)) | |
351 | abfd = abfd->my_archive; | |
69fd4758 | 352 | |
5c4ce239 AM |
353 | if (abfd->iovec == NULL) |
354 | { | |
355 | bfd_set_error (bfd_error_invalid_operation); | |
356 | return -1; | |
357 | } | |
358 | ||
359 | result = abfd->iovec->bstat (abfd, statbuf); | |
93509525 KD |
360 | if (result < 0) |
361 | bfd_set_error (bfd_error_system_call); | |
362 | return result; | |
363 | } | |
364 | ||
365 | /* Returns 0 for success, nonzero for failure (in which case bfd_get_error | |
366 | can retrieve the error code). */ | |
367 | ||
368 | int | |
c58b9523 | 369 | bfd_seek (bfd *abfd, file_ptr position, int direction) |
93509525 KD |
370 | { |
371 | int result; | |
5c4ce239 | 372 | ufile_ptr offset = 0; |
93509525 | 373 | |
5c4ce239 AM |
374 | while (abfd->my_archive != NULL |
375 | && !bfd_is_thin_archive (abfd->my_archive)) | |
93509525 | 376 | { |
5c4ce239 AM |
377 | offset += abfd->origin; |
378 | abfd = abfd->my_archive; | |
93509525 | 379 | } |
4d095f5b | 380 | offset += abfd->origin; |
93509525 | 381 | |
5c4ce239 | 382 | if (abfd->iovec == NULL) |
660722b0 | 383 | { |
5c4ce239 AM |
384 | bfd_set_error (bfd_error_invalid_operation); |
385 | return -1; | |
660722b0 | 386 | } |
93509525 | 387 | |
5c4ce239 AM |
388 | /* For the time being, a BFD may not seek to it's end. The problem |
389 | is that we don't easily have a way to recognize the end of an | |
390 | element in an archive. */ | |
391 | BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR); | |
392 | ||
393 | if (direction != SEEK_CUR) | |
394 | position += offset; | |
69fd4758 | 395 | |
ff91d2f0 AM |
396 | if ((direction == SEEK_CUR && position == 0) |
397 | || (direction == SEEK_SET && (ufile_ptr) position == abfd->where)) | |
398 | return 0; | |
399 | ||
5c4ce239 | 400 | result = abfd->iovec->bseek (abfd, position, direction); |
93509525 KD |
401 | if (result != 0) |
402 | { | |
93509525 | 403 | /* An EINVAL error probably means that the file offset was |
07d6d2b8 | 404 | absurd. */ |
5c4ce239 | 405 | if (errno == EINVAL) |
93509525 KD |
406 | bfd_set_error (bfd_error_file_truncated); |
407 | else | |
5c4ce239 | 408 | bfd_set_error (bfd_error_system_call); |
93509525 KD |
409 | } |
410 | else | |
411 | { | |
412 | /* Adjust `where' field. */ | |
5c4ce239 | 413 | if (direction == SEEK_CUR) |
93509525 | 414 | abfd->where += position; |
5c4ce239 AM |
415 | else |
416 | abfd->where = position; | |
93509525 | 417 | } |
5c4ce239 | 418 | |
93509525 KD |
419 | return result; |
420 | } | |
421 | ||
422 | /* | |
423 | FUNCTION | |
424 | bfd_get_mtime | |
425 | ||
426 | SYNOPSIS | |
c58b9523 | 427 | long bfd_get_mtime (bfd *abfd); |
93509525 KD |
428 | |
429 | DESCRIPTION | |
430 | Return the file modification time (as read from the file system, or | |
431 | from the archive header for archive members). | |
432 | ||
433 | */ | |
434 | ||
435 | long | |
c58b9523 | 436 | bfd_get_mtime (bfd *abfd) |
93509525 | 437 | { |
93509525 KD |
438 | struct stat buf; |
439 | ||
440 | if (abfd->mtime_set) | |
441 | return abfd->mtime; | |
442 | ||
5c4ce239 | 443 | if (bfd_stat (abfd, &buf) != 0) |
93509525 KD |
444 | return 0; |
445 | ||
446 | abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */ | |
447 | return buf.st_mtime; | |
448 | } | |
449 | ||
450 | /* | |
451 | FUNCTION | |
452 | bfd_get_size | |
453 | ||
454 | SYNOPSIS | |
47fdcf63 | 455 | ufile_ptr bfd_get_size (bfd *abfd); |
93509525 KD |
456 | |
457 | DESCRIPTION | |
458 | Return the file size (as read from file system) for the file | |
459 | associated with BFD @var{abfd}. | |
460 | ||
461 | The initial motivation for, and use of, this routine is not | |
462 | so we can get the exact size of the object the BFD applies to, since | |
463 | that might not be generally possible (archive members for example). | |
464 | It would be ideal if someone could eventually modify | |
465 | it so that such results were guaranteed. | |
466 | ||
467 | Instead, we want to ask questions like "is this NNN byte sized | |
468 | object I'm about to try read from file offset YYY reasonable?" | |
469 | As as example of where we might do this, some object formats | |
470 | use string tables for which the first <<sizeof (long)>> bytes of the | |
471 | table contain the size of the table itself, including the size bytes. | |
472 | If an application tries to read what it thinks is one of these | |
473 | string tables, without some way to validate the size, and for | |
474 | some reason the size is wrong (byte swapping error, wrong location | |
475 | for the string table, etc.), the only clue is likely to be a read | |
476 | error when it tries to read the table, or a "virtual memory | |
477 | exhausted" error when it tries to allocate 15 bazillon bytes | |
478 | of space for the 15 bazillon byte table it is about to read. | |
5c4491d3 | 479 | This function at least allows us to answer the question, "is the |
93509525 | 480 | size reasonable?". |
b03202e3 AM |
481 | |
482 | A return value of zero indicates the file size is unknown. | |
93509525 KD |
483 | */ |
484 | ||
47fdcf63 | 485 | ufile_ptr |
c58b9523 | 486 | bfd_get_size (bfd *abfd) |
93509525 | 487 | { |
b03202e3 AM |
488 | /* A size of 0 means we haven't yet called bfd_stat. A size of 1 |
489 | means we have a cached value of 0, ie. unknown. */ | |
490 | if (abfd->size <= 1 || bfd_write_p (abfd)) | |
491 | { | |
492 | struct stat buf; | |
93509525 | 493 | |
b03202e3 AM |
494 | if (abfd->size == 1 && !bfd_write_p (abfd)) |
495 | return 0; | |
93509525 | 496 | |
b03202e3 AM |
497 | if (bfd_stat (abfd, &buf) != 0 |
498 | || buf.st_size == 0 | |
499 | || buf.st_size - (ufile_ptr) buf.st_size != 0) | |
500 | { | |
501 | abfd->size = 1; | |
502 | return 0; | |
503 | } | |
504 | abfd->size = buf.st_size; | |
505 | } | |
506 | return abfd->size; | |
93509525 | 507 | } |
25b88f33 | 508 | |
8e2f54bc L |
509 | /* |
510 | FUNCTION | |
511 | bfd_get_file_size | |
512 | ||
513 | SYNOPSIS | |
47fdcf63 | 514 | ufile_ptr bfd_get_file_size (bfd *abfd); |
8e2f54bc L |
515 | |
516 | DESCRIPTION | |
517 | Return the file size (as read from file system) for the file | |
518 | associated with BFD @var{abfd}. It supports both normal files | |
519 | and archive elements. | |
520 | ||
521 | */ | |
522 | ||
47fdcf63 | 523 | ufile_ptr |
8e2f54bc L |
524 | bfd_get_file_size (bfd *abfd) |
525 | { | |
b570b954 | 526 | ufile_ptr file_size, archive_size = (ufile_ptr) -1; |
3b37f0f1 | 527 | unsigned int compression_p2 = 0; |
b570b954 | 528 | |
8e2f54bc L |
529 | if (abfd->my_archive != NULL |
530 | && !bfd_is_thin_archive (abfd->my_archive)) | |
b570b954 AM |
531 | { |
532 | struct areltdata *adata = (struct areltdata *) abfd->arelt_data; | |
c01de193 AM |
533 | if (adata != NULL) |
534 | { | |
535 | archive_size = adata->parsed_size; | |
3b37f0f1 AM |
536 | /* If the archive is compressed, assume an element won't |
537 | expand more than eight times file size. */ | |
c01de193 AM |
538 | if (adata->arch_header != NULL |
539 | && memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag, | |
540 | "Z\012", 2) == 0) | |
3b37f0f1 | 541 | compression_p2 = 3; |
c01de193 AM |
542 | abfd = abfd->my_archive; |
543 | } | |
b570b954 | 544 | } |
8e2f54bc | 545 | |
3b37f0f1 | 546 | file_size = bfd_get_size (abfd) << compression_p2; |
b570b954 AM |
547 | if (archive_size < file_size) |
548 | return archive_size; | |
549 | return file_size; | |
8e2f54bc | 550 | } |
25b88f33 PP |
551 | |
552 | /* | |
553 | FUNCTION | |
554 | bfd_mmap | |
555 | ||
556 | SYNOPSIS | |
557 | void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, | |
07d6d2b8 AM |
558 | int prot, int flags, file_ptr offset, |
559 | void **map_addr, bfd_size_type *map_len); | |
25b88f33 PP |
560 | |
561 | DESCRIPTION | |
562 | Return mmap()ed region of the file, if possible and implemented. | |
07d6d2b8 AM |
563 | LEN and OFFSET do not need to be page aligned. The page aligned |
564 | address and length are written to MAP_ADDR and MAP_LEN. | |
25b88f33 PP |
565 | |
566 | */ | |
567 | ||
568 | void * | |
569 | bfd_mmap (bfd *abfd, void *addr, bfd_size_type len, | |
4c95ab76 | 570 | int prot, int flags, file_ptr offset, |
07d6d2b8 | 571 | void **map_addr, bfd_size_type *map_len) |
25b88f33 | 572 | { |
5c4ce239 AM |
573 | while (abfd->my_archive != NULL |
574 | && !bfd_is_thin_archive (abfd->my_archive)) | |
575 | { | |
576 | offset += abfd->origin; | |
577 | abfd = abfd->my_archive; | |
578 | } | |
4d095f5b | 579 | offset += abfd->origin; |
25b88f33 PP |
580 | |
581 | if (abfd->iovec == NULL) | |
5c4ce239 AM |
582 | { |
583 | bfd_set_error (bfd_error_invalid_operation); | |
584 | return (void *) -1; | |
585 | } | |
25b88f33 | 586 | |
4c95ab76 | 587 | return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset, |
07d6d2b8 | 588 | map_addr, map_len); |
25b88f33 | 589 | } |
65077aa8 TG |
590 | |
591 | /* Memory file I/O operations. */ | |
592 | ||
593 | static file_ptr | |
594 | memory_bread (bfd *abfd, void *ptr, file_ptr size) | |
595 | { | |
596 | struct bfd_in_memory *bim; | |
597 | bfd_size_type get; | |
598 | ||
599 | bim = (struct bfd_in_memory *) abfd->iostream; | |
600 | get = size; | |
601 | if (abfd->where + get > bim->size) | |
602 | { | |
603 | if (bim->size < (bfd_size_type) abfd->where) | |
07d6d2b8 | 604 | get = 0; |
65077aa8 | 605 | else |
07d6d2b8 | 606 | get = bim->size - abfd->where; |
65077aa8 TG |
607 | bfd_set_error (bfd_error_file_truncated); |
608 | } | |
609 | memcpy (ptr, bim->buffer + abfd->where, (size_t) get); | |
610 | return get; | |
611 | } | |
612 | ||
613 | static file_ptr | |
614 | memory_bwrite (bfd *abfd, const void *ptr, file_ptr size) | |
615 | { | |
616 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
617 | ||
618 | if (abfd->where + size > bim->size) | |
619 | { | |
620 | bfd_size_type newsize, oldsize; | |
621 | ||
622 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
623 | bim->size = abfd->where + size; | |
624 | /* Round up to cut down on memory fragmentation */ | |
625 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
626 | if (newsize > oldsize) | |
07d6d2b8 AM |
627 | { |
628 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); | |
629 | if (bim->buffer == NULL) | |
630 | { | |
631 | bim->size = 0; | |
632 | return 0; | |
633 | } | |
634 | if (newsize > bim->size) | |
635 | memset (bim->buffer + bim->size, 0, newsize - bim->size); | |
636 | } | |
65077aa8 TG |
637 | } |
638 | memcpy (bim->buffer + abfd->where, ptr, (size_t) size); | |
639 | return size; | |
640 | } | |
641 | ||
642 | static file_ptr | |
643 | memory_btell (bfd *abfd) | |
644 | { | |
645 | return abfd->where; | |
646 | } | |
647 | ||
648 | static int | |
649 | memory_bseek (bfd *abfd, file_ptr position, int direction) | |
650 | { | |
651 | file_ptr nwhere; | |
652 | struct bfd_in_memory *bim; | |
653 | ||
654 | bim = (struct bfd_in_memory *) abfd->iostream; | |
655 | ||
656 | if (direction == SEEK_SET) | |
657 | nwhere = position; | |
658 | else | |
659 | nwhere = abfd->where + position; | |
660 | ||
661 | if (nwhere < 0) | |
662 | { | |
663 | abfd->where = 0; | |
664 | errno = EINVAL; | |
665 | return -1; | |
666 | } | |
667 | ||
668 | if ((bfd_size_type)nwhere > bim->size) | |
669 | { | |
670 | if (abfd->direction == write_direction | |
07d6d2b8 AM |
671 | || abfd->direction == both_direction) |
672 | { | |
673 | bfd_size_type newsize, oldsize; | |
674 | ||
675 | oldsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
676 | bim->size = nwhere; | |
677 | /* Round up to cut down on memory fragmentation */ | |
678 | newsize = (bim->size + 127) & ~(bfd_size_type) 127; | |
679 | if (newsize > oldsize) | |
680 | { | |
681 | bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize); | |
682 | if (bim->buffer == NULL) | |
683 | { | |
684 | errno = EINVAL; | |
685 | bim->size = 0; | |
686 | return -1; | |
687 | } | |
688 | memset (bim->buffer + oldsize, 0, newsize - oldsize); | |
689 | } | |
690 | } | |
65077aa8 | 691 | else |
07d6d2b8 AM |
692 | { |
693 | abfd->where = bim->size; | |
694 | errno = EINVAL; | |
695 | bfd_set_error (bfd_error_file_truncated); | |
696 | return -1; | |
697 | } | |
65077aa8 TG |
698 | } |
699 | return 0; | |
700 | } | |
701 | ||
405bf443 | 702 | static int |
65077aa8 TG |
703 | memory_bclose (struct bfd *abfd) |
704 | { | |
705 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
706 | ||
c9594989 | 707 | free (bim->buffer); |
65077aa8 TG |
708 | free (bim); |
709 | abfd->iostream = NULL; | |
710 | ||
405bf443 | 711 | return 0; |
65077aa8 TG |
712 | } |
713 | ||
714 | static int | |
715 | memory_bflush (bfd *abfd ATTRIBUTE_UNUSED) | |
716 | { | |
717 | return 0; | |
718 | } | |
719 | ||
720 | static int | |
721 | memory_bstat (bfd *abfd, struct stat *statbuf) | |
722 | { | |
723 | struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream; | |
724 | ||
b5dee4ea | 725 | memset (statbuf, 0, sizeof (*statbuf)); |
65077aa8 TG |
726 | statbuf->st_size = bim->size; |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
731 | static void * | |
732 | memory_bmmap (bfd *abfd ATTRIBUTE_UNUSED, void *addr ATTRIBUTE_UNUSED, | |
07d6d2b8 AM |
733 | bfd_size_type len ATTRIBUTE_UNUSED, int prot ATTRIBUTE_UNUSED, |
734 | int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED, | |
735 | void **map_addr ATTRIBUTE_UNUSED, | |
736 | bfd_size_type *map_len ATTRIBUTE_UNUSED) | |
65077aa8 TG |
737 | { |
738 | return (void *)-1; | |
739 | } | |
740 | ||
741 | const struct bfd_iovec _bfd_memory_iovec = | |
742 | { | |
743 | &memory_bread, &memory_bwrite, &memory_btell, &memory_bseek, | |
744 | &memory_bclose, &memory_bflush, &memory_bstat, &memory_bmmap | |
745 | }; |