Commit | Line | Data |
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6724ff46 RP |
1 | /* opncls.c -- open and close a BFD. |
2 | Copyright (C) 1990-1991 Free Software Foundation, Inc. | |
3 | Written by Cygnus Support. | |
fc723380 | 4 | |
6724ff46 | 5 | This file is part of BFD, the Binary File Descriptor library. |
4a81b561 | 6 | |
6724ff46 | 7 | This program is free software; you can redistribute it and/or modify |
4a81b561 | 8 | it under the terms of the GNU General Public License as published by |
6724ff46 RP |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
4a81b561 | 11 | |
6724ff46 | 12 | This program is distributed in the hope that it will be useful, |
4a81b561 DHW |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
6724ff46 RP |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
4a81b561 DHW |
20 | |
21 | /* $Id$ */ | |
22 | ||
4a81b561 | 23 | #include "bfd.h" |
ff7ce170 | 24 | #include "sysdep.h" |
4a81b561 | 25 | #include "libbfd.h" |
6724ff46 | 26 | #include "obstack.h" |
4a81b561 DHW |
27 | extern void bfd_cache_init(); |
28 | FILE *bfd_open_file(); | |
29 | ||
30 | /* fdopen is a loser -- we should use stdio exclusively. Unfortunately | |
31 | if we do that we can't use fcntl. */ | |
6724ff46 | 32 | |
4a81b561 | 33 | |
ff7ce170 | 34 | #define obstack_chunk_alloc bfd_xmalloc |
9872a49c SC |
35 | #define obstack_chunk_free free |
36 | ||
fc723380 JG |
37 | /* Return a new BFD. All BFD's are allocated through this routine. */ |
38 | ||
4a81b561 DHW |
39 | bfd *new_bfd() |
40 | { | |
9872a49c | 41 | bfd *nbfd; |
fc723380 | 42 | |
b1847ba9 JG |
43 | nbfd = (bfd *)zalloc (sizeof (bfd)); |
44 | if (!nbfd) | |
45 | return 0; | |
4a81b561 | 46 | |
ff7ce170 PB |
47 | bfd_check_init(); |
48 | obstack_begin((PTR)&nbfd->memory, 128); | |
49 | ||
50 | nbfd->arch_info = &bfd_default_arch_struct; | |
51 | ||
4a81b561 DHW |
52 | nbfd->direction = no_direction; |
53 | nbfd->iostream = NULL; | |
54 | nbfd->where = 0; | |
55 | nbfd->sections = (asection *)NULL; | |
56 | nbfd->format = bfd_unknown; | |
57 | nbfd->my_archive = (bfd *)NULL; | |
58 | nbfd->origin = 0; | |
59 | nbfd->opened_once = false; | |
60 | nbfd->output_has_begun = false; | |
61 | nbfd->section_count = 0; | |
9846338e | 62 | nbfd->usrdata = (PTR)NULL; |
4a81b561 DHW |
63 | nbfd->sections = (asection *)NULL; |
64 | nbfd->cacheable = false; | |
65 | nbfd->flags = NO_FLAGS; | |
fc723380 | 66 | nbfd->mtime_set = 0; |
4a81b561 DHW |
67 | return nbfd; |
68 | } | |
fc723380 JG |
69 | |
70 | /* Allocate a new BFD as a member of archive OBFD. */ | |
71 | ||
4a81b561 DHW |
72 | bfd *new_bfd_contained_in(obfd) |
73 | bfd *obfd; | |
74 | { | |
9846338e | 75 | bfd *nbfd = new_bfd(); |
4a81b561 DHW |
76 | nbfd->xvec = obfd->xvec; |
77 | nbfd->my_archive = obfd; | |
78 | nbfd->direction = read_direction; | |
79 | return nbfd; | |
80 | } | |
81 | ||
6f715d66 SC |
82 | /*doc* |
83 | @section Opening and Closing BFDs | |
84 | ||
85 | */ | |
86 | /*proto* | |
87 | *i bfd_openr | |
6724ff46 RP |
88 | Opens the file supplied (using @code{fopen}) with the target supplied, it |
89 | returns a pointer to the created BFD. | |
6f715d66 SC |
90 | |
91 | If NULL is returned then an error has occured. | |
92 | Possible errors are no_memory, invalid_target or system_call error. | |
93 | *; PROTO(bfd*, bfd_openr, (CONST char *filename,CONST char*target)); | |
94 | *-*/ | |
4a81b561 DHW |
95 | |
96 | bfd * | |
9846338e SC |
97 | DEFUN(bfd_openr, (filename, target), |
98 | CONST char *filename AND | |
99 | CONST char *target) | |
4a81b561 DHW |
100 | { |
101 | bfd *nbfd; | |
102 | bfd_target *target_vec; | |
103 | ||
4a81b561 DHW |
104 | nbfd = new_bfd(); |
105 | if (nbfd == NULL) { | |
106 | bfd_error = no_memory; | |
107 | return NULL; | |
108 | } | |
109 | ||
c0e5039e JG |
110 | target_vec = bfd_find_target (target, nbfd); |
111 | if (target_vec == NULL) { | |
112 | bfd_error = invalid_target; | |
113 | return NULL; | |
114 | } | |
115 | ||
4a81b561 | 116 | nbfd->filename = filename; |
4a81b561 DHW |
117 | nbfd->direction = read_direction; |
118 | ||
119 | if (bfd_open_file (nbfd) == NULL) { | |
120 | bfd_error = system_call_error; /* File didn't exist, or some such */ | |
9872a49c | 121 | bfd_release(nbfd,0); |
4a81b561 DHW |
122 | return NULL; |
123 | } | |
124 | return nbfd; | |
125 | } | |
126 | ||
127 | ||
128 | /* Don't try to `optimize' this function: | |
129 | ||
130 | o - We lock using stack space so that interrupting the locking | |
131 | won't cause a storage leak. | |
132 | o - We open the file stream last, since we don't want to have to | |
133 | close it if anything goes wrong. Closing the stream means closing | |
134 | the file descriptor too, even though we didn't open it. | |
135 | */ | |
6f715d66 SC |
136 | /*proto* |
137 | *i bfd_fdopenr | |
6724ff46 | 138 | bfd_fdopenr is to bfd_fopenr much like fdopen is to fopen. It opens a BFD on |
6f715d66 SC |
139 | a file already described by the @var{fd} supplied. |
140 | ||
141 | Possible errors are no_memory, invalid_target and system_call error. | |
142 | *; PROTO(bfd *, bfd_fdopenr, | |
143 | (CONST char *filename, CONST char *target, int fd)); | |
144 | *-*/ | |
4a81b561 DHW |
145 | |
146 | bfd * | |
9846338e SC |
147 | DEFUN(bfd_fdopenr,(filename, target, fd), |
148 | CONST char *filename AND | |
149 | CONST char *target AND | |
150 | int fd) | |
4a81b561 DHW |
151 | { |
152 | bfd *nbfd; | |
153 | bfd_target *target_vec; | |
154 | int fdflags; | |
4a81b561 | 155 | |
4a81b561 DHW |
156 | bfd_error = system_call_error; |
157 | ||
fb3be09b JG |
158 | #ifdef NO_FCNTL |
159 | fdflags = O_RDWR; /* Assume full access */ | |
160 | #else | |
6f715d66 | 161 | fdflags = fcntl (fd, F_GETFL, NULL); |
4a81b561 | 162 | #endif |
fb3be09b | 163 | if (fdflags == -1) return NULL; |
4a81b561 DHW |
164 | |
165 | nbfd = new_bfd(); | |
166 | ||
167 | if (nbfd == NULL) { | |
168 | bfd_error = no_memory; | |
169 | return NULL; | |
170 | } | |
c0e5039e JG |
171 | |
172 | target_vec = bfd_find_target (target, nbfd); | |
173 | if (target_vec == NULL) { | |
174 | bfd_error = invalid_target; | |
175 | return NULL; | |
176 | } | |
177 | ||
ff7ce170 PB |
178 | #ifdef FASCIST_FDOPEN |
179 | nbfd->iostream = (char *) fdopen (fd, "r"); | |
180 | #else | |
4a81b561 DHW |
181 | /* if the fd were open for read only, this still would not hurt: */ |
182 | nbfd->iostream = (char *) fdopen (fd, "r+"); | |
ff7ce170 | 183 | #endif |
4a81b561 | 184 | if (nbfd->iostream == NULL) { |
fc723380 | 185 | (void) obstack_free (&nbfd->memory, (PTR)0); |
4a81b561 DHW |
186 | return NULL; |
187 | } | |
188 | ||
189 | /* OK, put everything where it belongs */ | |
190 | ||
191 | nbfd->filename = filename; | |
4a81b561 DHW |
192 | |
193 | /* As a special case we allow a FD open for read/write to | |
194 | be written through, although doing so requires that we end | |
195 | the previous clause with a preposition. */ | |
ff7ce170 PB |
196 | /* (O_ACCMODE) parens are to avoid Ultrix header file bug */ |
197 | switch (fdflags & (O_ACCMODE)) { | |
4a81b561 DHW |
198 | case O_RDONLY: nbfd->direction = read_direction; break; |
199 | case O_WRONLY: nbfd->direction = write_direction; break; | |
200 | case O_RDWR: nbfd->direction = both_direction; break; | |
201 | default: abort (); | |
202 | } | |
203 | ||
c0e5039e | 204 | bfd_cache_init (nbfd); |
4a81b561 DHW |
205 | |
206 | return nbfd; | |
207 | } | |
208 | \f | |
209 | /** bfd_openw -- open for writing. | |
6724ff46 | 210 | Returns a pointer to a freshly-allocated BFD on success, or NULL. |
4a81b561 DHW |
211 | |
212 | See comment by bfd_fdopenr before you try to modify this function. */ | |
213 | ||
6f715d66 | 214 | /*proto* bfd_openw |
6724ff46 | 215 | Creates a BFD, associated with file @var{filename}, using the file |
6f715d66 SC |
216 | format @var{target}, and returns a pointer to it. |
217 | ||
218 | Possible errors are system_call_error, no_memory, invalid_target. | |
219 | *; PROTO(bfd *, bfd_openw, (CONST char *filename, CONST char *target)); | |
220 | */ | |
221 | ||
4a81b561 | 222 | bfd * |
9846338e SC |
223 | DEFUN(bfd_openw,(filename, target), |
224 | CONST char *filename AND | |
225 | CONST char *target) | |
4a81b561 DHW |
226 | { |
227 | bfd *nbfd; | |
228 | bfd_target *target_vec; | |
229 | ||
4a81b561 DHW |
230 | bfd_error = system_call_error; |
231 | ||
232 | /* nbfd has to point to head of malloc'ed block so that bfd_close may | |
233 | reclaim it correctly. */ | |
234 | ||
235 | nbfd = new_bfd(); | |
236 | if (nbfd == NULL) { | |
237 | bfd_error = no_memory; | |
238 | return NULL; | |
239 | } | |
240 | ||
c0e5039e JG |
241 | target_vec = bfd_find_target (target, nbfd); |
242 | if (target_vec == NULL) return NULL; | |
243 | ||
4a81b561 | 244 | nbfd->filename = filename; |
4a81b561 DHW |
245 | nbfd->direction = write_direction; |
246 | ||
247 | if (bfd_open_file (nbfd) == NULL) { | |
248 | bfd_error = system_call_error; /* File not writeable, etc */ | |
fc723380 | 249 | (void) obstack_free (&nbfd->memory, (PTR)0); |
4a81b561 DHW |
250 | return NULL; |
251 | } | |
252 | return nbfd; | |
253 | } | |
6f715d66 SC |
254 | |
255 | /*proto* bfd_close | |
6724ff46 | 256 | This function closes a BFD. If the BFD was open for writing, then |
6f715d66 SC |
257 | pending operations are completed and the file written out and closed. |
258 | If the created file is executable, then @code{chmod} is called to mark | |
259 | it as such. | |
260 | ||
188d6d22 | 261 | All memory attached to the BFD's obstacks is released. |
6f715d66 SC |
262 | |
263 | @code{true} is returned if all is ok, otherwise @code{false}. | |
264 | *; PROTO(boolean, bfd_close,(bfd *)); | |
265 | */ | |
266 | ||
4a81b561 | 267 | boolean |
6f715d66 SC |
268 | DEFUN(bfd_close,(abfd), |
269 | bfd *abfd) | |
4a81b561 | 270 | { |
2b1d8a50 JG |
271 | if (!bfd_read_p(abfd)) |
272 | if (BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)) != true) | |
273 | return false; | |
274 | ||
4a81b561 DHW |
275 | if (BFD_SEND (abfd, _close_and_cleanup, (abfd)) != true) return false; |
276 | ||
277 | bfd_cache_close(abfd); | |
2b1d8a50 JG |
278 | |
279 | /* If the file was open for writing and is now executable, | |
280 | make it so */ | |
4a81b561 DHW |
281 | if (abfd->direction == write_direction |
282 | && abfd->flags & EXEC_P) { | |
283 | struct stat buf; | |
284 | stat(abfd->filename, &buf); | |
7ed4093a SC |
285 | #ifndef S_IXUSR |
286 | #define S_IXUSR 0100 /* Execute by owner. */ | |
287 | #endif | |
288 | #ifndef S_IXGRP | |
289 | #define S_IXGRP 0010 /* Execute by group. */ | |
290 | #endif | |
291 | #ifndef S_IXOTH | |
292 | #define S_IXOTH 0001 /* Execute by others. */ | |
293 | #endif | |
294 | ||
4a81b561 DHW |
295 | chmod(abfd->filename,buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH); |
296 | } | |
fc723380 | 297 | (void) obstack_free (&abfd->memory, (PTR)0); |
ff7ce170 PB |
298 | (void) free(abfd); |
299 | return true; | |
300 | } | |
301 | ||
302 | /*proto* bfd_close_all_done | |
303 | This function closes a BFD. It differs from @code{bfd_close} since it | |
304 | does not complete any pending operations. This routine would be used | |
305 | if the application had just used BFD for swapping and didn't want to | |
306 | use any of the writing code. | |
307 | ||
308 | If the created file is executable, then @code{chmod} is called to mark | |
309 | it as such. | |
310 | ||
311 | All memory attached to the BFD's obstacks is released. | |
312 | ||
313 | @code{true} is returned if all is ok, otherwise @code{false}. | |
314 | *; PROTO(boolean, bfd_close_all_done,(bfd *)); | |
315 | */ | |
316 | ||
317 | boolean | |
318 | DEFUN(bfd_close_all_done,(abfd), | |
319 | bfd *abfd) | |
320 | { | |
321 | bfd_cache_close(abfd); | |
322 | ||
323 | /* If the file was open for writing and is now executable, | |
324 | make it so */ | |
325 | if (abfd->direction == write_direction | |
326 | && abfd->flags & EXEC_P) { | |
327 | struct stat buf; | |
328 | stat(abfd->filename, &buf); | |
329 | #ifndef S_IXUSR | |
330 | #define S_IXUSR 0100 /* Execute by owner. */ | |
331 | #endif | |
332 | #ifndef S_IXGRP | |
333 | #define S_IXGRP 0010 /* Execute by group. */ | |
334 | #endif | |
335 | #ifndef S_IXOTH | |
336 | #define S_IXOTH 0001 /* Execute by others. */ | |
337 | #endif | |
338 | ||
339 | chmod(abfd->filename,buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH); | |
340 | } | |
341 | (void) obstack_free (&abfd->memory, (PTR)0); | |
342 | (void) free(abfd); | |
4a81b561 DHW |
343 | return true; |
344 | } | |
fc723380 | 345 | |
6f715d66 | 346 | /*proto* bfd_create |
6724ff46 RP |
347 | This routine creates a new BFD in the manner of @code{bfd_openw}, but without |
348 | opening a file. The new BFD takes the target from the target used by | |
6f715d66 SC |
349 | @var{template}. The format is always set to @code{bfd_object}. |
350 | ||
351 | *; PROTO(bfd *, bfd_create, (CONST char *filename, bfd *template)); | |
352 | */ | |
fc723380 | 353 | |
4a81b561 | 354 | bfd * |
9846338e SC |
355 | DEFUN(bfd_create,(filename, template), |
356 | CONST char *filename AND | |
6f715d66 | 357 | bfd *template) |
4a81b561 DHW |
358 | { |
359 | bfd *nbfd = new_bfd(); | |
360 | if (nbfd == (bfd *)NULL) { | |
361 | bfd_error = no_memory; | |
362 | return (bfd *)NULL; | |
363 | } | |
364 | nbfd->filename = filename; | |
9872a49c SC |
365 | if(template) { |
366 | nbfd->xvec = template->xvec; | |
367 | } | |
4a81b561 | 368 | nbfd->direction = no_direction; |
9872a49c | 369 | bfd_set_format(nbfd, bfd_object); |
4a81b561 | 370 | return nbfd; |
4a81b561 | 371 | } |
9872a49c | 372 | |
fc723380 JG |
373 | /* Memory allocation */ |
374 | ||
7ed4093a SC |
375 | DEFUN(PTR bfd_alloc_by_size_t,(abfd, size), |
376 | bfd *abfd AND | |
377 | size_t size) | |
378 | { | |
379 | PTR res = obstack_alloc(&(abfd->memory), size); | |
380 | return res; | |
381 | } | |
6f715d66 SC |
382 | |
383 | DEFUN(void bfd_alloc_grow,(abfd, ptr, size), | |
384 | bfd *abfd AND | |
385 | PTR ptr AND | |
386 | bfd_size_type size) | |
387 | { | |
6724ff46 | 388 | (void) obstack_grow(&(abfd->memory), ptr, size); |
6f715d66 SC |
389 | } |
390 | DEFUN(PTR bfd_alloc_finish,(abfd), | |
391 | bfd *abfd) | |
392 | { | |
393 | return obstack_finish(&(abfd->memory)); | |
394 | } | |
395 | ||
9872a49c SC |
396 | DEFUN(PTR bfd_alloc, (abfd, size), |
397 | bfd *abfd AND | |
fc723380 | 398 | bfd_size_type size) |
9872a49c | 399 | { |
7ed4093a | 400 | return bfd_alloc_by_size_t(abfd, (size_t)size); |
9872a49c SC |
401 | } |
402 | ||
403 | DEFUN(PTR bfd_zalloc,(abfd, size), | |
404 | bfd *abfd AND | |
fc723380 | 405 | bfd_size_type size) |
9872a49c SC |
406 | { |
407 | PTR res = bfd_alloc(abfd, size); | |
fc723380 | 408 | memset(res, 0, (size_t)size); |
9872a49c SC |
409 | return res; |
410 | } | |
411 | ||
412 | DEFUN(PTR bfd_realloc,(abfd, old, size), | |
413 | bfd *abfd AND | |
414 | PTR old AND | |
fc723380 | 415 | bfd_size_type size) |
9872a49c SC |
416 | { |
417 | PTR res = bfd_alloc(abfd, size); | |
fc723380 | 418 | memcpy(res, old, (size_t)size); |
9872a49c SC |
419 | return res; |
420 | } | |
421 | ||
6f715d66 SC |
422 | /*proto* bfd_alloc_size |
423 | Return the number of bytes in the obstacks connected to the supplied | |
6724ff46 | 424 | BFD. |
6f715d66 SC |
425 | *; PROTO(bfd_size_type,bfd_alloc_size,(bfd *abfd)); |
426 | */ | |
9872a49c | 427 | |
6f715d66 SC |
428 | bfd_size_type |
429 | DEFUN( bfd_alloc_size,(abfd), | |
9872a49c SC |
430 | bfd *abfd) |
431 | { | |
432 | struct _obstack_chunk *chunk = abfd->memory.chunk; | |
433 | size_t size = 0; | |
434 | while (chunk) { | |
435 | size += chunk->limit - &(chunk->contents[0]); | |
436 | chunk = chunk->prev; | |
437 | } | |
438 | return size; | |
439 | } |