| 1 | /* opncls.c -- open and close a BFD. |
| 2 | Copyright (C) 1990-1991 Free Software Foundation, Inc. |
| 3 | Written by Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 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 |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | /* $Id$ */ |
| 22 | |
| 23 | #include "bfd.h" |
| 24 | #include "sysdep.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "obstack.h" |
| 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. */ |
| 32 | |
| 33 | |
| 34 | #define obstack_chunk_alloc bfd_xmalloc |
| 35 | #define obstack_chunk_free free |
| 36 | |
| 37 | /* Return a new BFD. All BFD's are allocated through this routine. */ |
| 38 | |
| 39 | bfd *new_bfd() |
| 40 | { |
| 41 | bfd *nbfd; |
| 42 | |
| 43 | nbfd = (bfd *)zalloc (sizeof (bfd)); |
| 44 | if (!nbfd) |
| 45 | return 0; |
| 46 | |
| 47 | bfd_check_init(); |
| 48 | obstack_begin((PTR)&nbfd->memory, 128); |
| 49 | |
| 50 | nbfd->arch_info = &bfd_default_arch_struct; |
| 51 | |
| 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; |
| 62 | nbfd->usrdata = (PTR)NULL; |
| 63 | nbfd->sections = (asection *)NULL; |
| 64 | nbfd->cacheable = false; |
| 65 | nbfd->flags = NO_FLAGS; |
| 66 | nbfd->mtime_set = false; |
| 67 | |
| 68 | |
| 69 | return nbfd; |
| 70 | } |
| 71 | |
| 72 | /* Allocate a new BFD as a member of archive OBFD. */ |
| 73 | |
| 74 | bfd *new_bfd_contained_in(obfd) |
| 75 | bfd *obfd; |
| 76 | { |
| 77 | bfd *nbfd = new_bfd(); |
| 78 | nbfd->xvec = obfd->xvec; |
| 79 | nbfd->my_archive = obfd; |
| 80 | nbfd->direction = read_direction; |
| 81 | nbfd->target_defaulted = obfd->target_defaulted; |
| 82 | return nbfd; |
| 83 | } |
| 84 | |
| 85 | /* |
| 86 | SECTION |
| 87 | Opening and Closing BFDs |
| 88 | |
| 89 | */ |
| 90 | |
| 91 | /* |
| 92 | FUNCTION |
| 93 | bfd_openr |
| 94 | |
| 95 | SYNOPSIS |
| 96 | bfd *bfd_openr(CONST char *filename, CONST char*target); |
| 97 | |
| 98 | DESCRIPTION |
| 99 | This function opens the file supplied (using <<fopen>>) with the target |
| 100 | supplied, it returns a pointer to the created BFD. |
| 101 | |
| 102 | If NULL is returned then an error has occured. Possible errors |
| 103 | are <<no_memory>>, <<invalid_target>> or <<system_call>> error. |
| 104 | */ |
| 105 | |
| 106 | bfd * |
| 107 | DEFUN(bfd_openr, (filename, target), |
| 108 | CONST char *filename AND |
| 109 | CONST char *target) |
| 110 | { |
| 111 | bfd *nbfd; |
| 112 | bfd_target *target_vec; |
| 113 | |
| 114 | nbfd = new_bfd(); |
| 115 | if (nbfd == NULL) { |
| 116 | bfd_error = no_memory; |
| 117 | return NULL; |
| 118 | } |
| 119 | |
| 120 | target_vec = bfd_find_target (target, nbfd); |
| 121 | if (target_vec == NULL) { |
| 122 | bfd_error = invalid_target; |
| 123 | return NULL; |
| 124 | } |
| 125 | |
| 126 | nbfd->filename = filename; |
| 127 | nbfd->direction = read_direction; |
| 128 | |
| 129 | if (bfd_open_file (nbfd) == NULL) { |
| 130 | bfd_error = system_call_error; /* File didn't exist, or some such */ |
| 131 | bfd_release(nbfd,0); |
| 132 | return NULL; |
| 133 | } |
| 134 | return nbfd; |
| 135 | } |
| 136 | |
| 137 | |
| 138 | /* Don't try to `optimize' this function: |
| 139 | |
| 140 | o - We lock using stack space so that interrupting the locking |
| 141 | won't cause a storage leak. |
| 142 | o - We open the file stream last, since we don't want to have to |
| 143 | close it if anything goes wrong. Closing the stream means closing |
| 144 | the file descriptor too, even though we didn't open it. |
| 145 | */ |
| 146 | /* |
| 147 | FUNCTION |
| 148 | bfd_fdopenr |
| 149 | |
| 150 | SYNOPSIS |
| 151 | bfd *bfd_fdopenr(CONST char *filename, CONST char *target, int fd); |
| 152 | |
| 153 | DESCRIPTION |
| 154 | bfd_fdopenr is to bfd_fopenr much like fdopen is to fopen. |
| 155 | It opens a BFD on a file already described by the @var{fd} |
| 156 | supplied. |
| 157 | |
| 158 | Possible errors are no_memory, invalid_target and system_call |
| 159 | error. |
| 160 | */ |
| 161 | |
| 162 | bfd * |
| 163 | DEFUN(bfd_fdopenr,(filename, target, fd), |
| 164 | CONST char *filename AND |
| 165 | CONST char *target AND |
| 166 | int fd) |
| 167 | { |
| 168 | bfd *nbfd; |
| 169 | bfd_target *target_vec; |
| 170 | int fdflags; |
| 171 | |
| 172 | bfd_error = system_call_error; |
| 173 | |
| 174 | #ifdef NO_FCNTL |
| 175 | fdflags = O_RDWR; /* Assume full access */ |
| 176 | #else |
| 177 | fdflags = fcntl (fd, F_GETFL, NULL); |
| 178 | #endif |
| 179 | if (fdflags == -1) return NULL; |
| 180 | |
| 181 | nbfd = new_bfd(); |
| 182 | |
| 183 | if (nbfd == NULL) { |
| 184 | bfd_error = no_memory; |
| 185 | return NULL; |
| 186 | } |
| 187 | |
| 188 | target_vec = bfd_find_target (target, nbfd); |
| 189 | if (target_vec == NULL) { |
| 190 | bfd_error = invalid_target; |
| 191 | return NULL; |
| 192 | } |
| 193 | |
| 194 | #ifdef FASCIST_FDOPEN |
| 195 | nbfd->iostream = (char *) fdopen (fd, FOPEN_RB); |
| 196 | #else |
| 197 | /* if the fd were open for read only, this still would not hurt: */ |
| 198 | nbfd->iostream = (char *) fdopen (fd, FOPEN_RUB); |
| 199 | #endif |
| 200 | if (nbfd->iostream == NULL) { |
| 201 | (void) obstack_free (&nbfd->memory, (PTR)0); |
| 202 | return NULL; |
| 203 | } |
| 204 | |
| 205 | /* OK, put everything where it belongs */ |
| 206 | |
| 207 | nbfd->filename = filename; |
| 208 | |
| 209 | /* As a special case we allow a FD open for read/write to |
| 210 | be written through, although doing so requires that we end |
| 211 | the previous clause with a preposition. */ |
| 212 | /* (O_ACCMODE) parens are to avoid Ultrix header file bug */ |
| 213 | switch (fdflags & (O_ACCMODE)) { |
| 214 | case O_RDONLY: nbfd->direction = read_direction; break; |
| 215 | case O_WRONLY: nbfd->direction = write_direction; break; |
| 216 | case O_RDWR: nbfd->direction = both_direction; break; |
| 217 | default: abort (); |
| 218 | } |
| 219 | |
| 220 | bfd_cache_init (nbfd); |
| 221 | |
| 222 | return nbfd; |
| 223 | } |
| 224 | \f |
| 225 | /** bfd_openw -- open for writing. |
| 226 | Returns a pointer to a freshly-allocated BFD on success, or NULL. |
| 227 | |
| 228 | See comment by bfd_fdopenr before you try to modify this function. */ |
| 229 | |
| 230 | /* |
| 231 | FUNCTION |
| 232 | bfd_openw |
| 233 | |
| 234 | SYNOPSIS |
| 235 | bfd *bfd_openw(CONST char *filename, CONST char *target); |
| 236 | |
| 237 | DESCRIPTION |
| 238 | Creates a BFD, associated with file @var{filename}, using the |
| 239 | file format @var{target}, and returns a pointer to it. |
| 240 | |
| 241 | Possible errors are system_call_error, no_memory, |
| 242 | invalid_target. |
| 243 | */ |
| 244 | |
| 245 | bfd * |
| 246 | DEFUN(bfd_openw,(filename, target), |
| 247 | CONST char *filename AND |
| 248 | CONST char *target) |
| 249 | { |
| 250 | bfd *nbfd; |
| 251 | bfd_target *target_vec; |
| 252 | |
| 253 | bfd_error = system_call_error; |
| 254 | |
| 255 | /* nbfd has to point to head of malloc'ed block so that bfd_close may |
| 256 | reclaim it correctly. */ |
| 257 | |
| 258 | nbfd = new_bfd(); |
| 259 | if (nbfd == NULL) { |
| 260 | bfd_error = no_memory; |
| 261 | return NULL; |
| 262 | } |
| 263 | |
| 264 | target_vec = bfd_find_target (target, nbfd); |
| 265 | if (target_vec == NULL) return NULL; |
| 266 | |
| 267 | nbfd->filename = filename; |
| 268 | nbfd->direction = write_direction; |
| 269 | |
| 270 | if (bfd_open_file (nbfd) == NULL) { |
| 271 | bfd_error = system_call_error; /* File not writeable, etc */ |
| 272 | (void) obstack_free (&nbfd->memory, (PTR)0); |
| 273 | return NULL; |
| 274 | } |
| 275 | return nbfd; |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | |
| 280 | FUNCTION |
| 281 | bfd_close |
| 282 | |
| 283 | SYNOPSIS |
| 284 | boolean bfd_close(bfd *); |
| 285 | |
| 286 | DESCRIPTION |
| 287 | |
| 288 | This function closes a BFD. If the BFD was open for writing, |
| 289 | then pending operations are completed and the file written out |
| 290 | and closed. If the created file is executable, then |
| 291 | <<chmod>> is called to mark it as such. |
| 292 | |
| 293 | All memory attached to the BFD's obstacks is released. |
| 294 | |
| 295 | RETURNS |
| 296 | <<true>> is returned if all is ok, otherwise <<false>>. |
| 297 | */ |
| 298 | |
| 299 | |
| 300 | boolean |
| 301 | DEFUN(bfd_close,(abfd), |
| 302 | bfd *abfd) |
| 303 | { |
| 304 | if (!bfd_read_p(abfd)) |
| 305 | if (BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)) != true) |
| 306 | return false; |
| 307 | |
| 308 | if (BFD_SEND (abfd, _close_and_cleanup, (abfd)) != true) return false; |
| 309 | |
| 310 | bfd_cache_close(abfd); |
| 311 | |
| 312 | /* If the file was open for writing and is now executable, |
| 313 | make it so */ |
| 314 | if (abfd->direction == write_direction |
| 315 | && abfd->flags & EXEC_P) { |
| 316 | struct stat buf; |
| 317 | stat(abfd->filename, &buf); |
| 318 | #ifndef S_IXUSR |
| 319 | #define S_IXUSR 0100 /* Execute by owner. */ |
| 320 | #endif |
| 321 | #ifndef S_IXGRP |
| 322 | #define S_IXGRP 0010 /* Execute by group. */ |
| 323 | #endif |
| 324 | #ifndef S_IXOTH |
| 325 | #define S_IXOTH 0001 /* Execute by others. */ |
| 326 | #endif |
| 327 | |
| 328 | chmod(abfd->filename, 0777 & (buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH)); |
| 329 | } |
| 330 | (void) obstack_free (&abfd->memory, (PTR)0); |
| 331 | (void) free(abfd); |
| 332 | return true; |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | FUNCTION |
| 337 | bfd_close_all_done |
| 338 | |
| 339 | SYNOPSIS |
| 340 | boolean bfd_close_all_done(bfd *); |
| 341 | |
| 342 | DESCRIPTION |
| 343 | This function closes a BFD. It differs from <<bfd_close>> |
| 344 | since it does not complete any pending operations. This |
| 345 | routine would be used if the application had just used BFD for |
| 346 | swapping and didn't want to use any of the writing code. |
| 347 | |
| 348 | If the created file is executable, then <<chmod>> is called |
| 349 | to mark it as such. |
| 350 | |
| 351 | All memory attached to the BFD's obstacks is released. |
| 352 | |
| 353 | RETURNS |
| 354 | <<true>> is returned if all is ok, otherwise <<false>>. |
| 355 | |
| 356 | */ |
| 357 | |
| 358 | boolean |
| 359 | DEFUN(bfd_close_all_done,(abfd), |
| 360 | bfd *abfd) |
| 361 | { |
| 362 | bfd_cache_close(abfd); |
| 363 | |
| 364 | /* If the file was open for writing and is now executable, |
| 365 | make it so */ |
| 366 | if (abfd->direction == write_direction |
| 367 | && abfd->flags & EXEC_P) { |
| 368 | struct stat buf; |
| 369 | stat(abfd->filename, &buf); |
| 370 | #ifndef S_IXUSR |
| 371 | #define S_IXUSR 0100 /* Execute by owner. */ |
| 372 | #endif |
| 373 | #ifndef S_IXGRP |
| 374 | #define S_IXGRP 0010 /* Execute by group. */ |
| 375 | #endif |
| 376 | #ifndef S_IXOTH |
| 377 | #define S_IXOTH 0001 /* Execute by others. */ |
| 378 | #endif |
| 379 | |
| 380 | chmod(abfd->filename, 0x777 &(buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH)); |
| 381 | } |
| 382 | (void) obstack_free (&abfd->memory, (PTR)0); |
| 383 | (void) free(abfd); |
| 384 | return true; |
| 385 | } |
| 386 | |
| 387 | |
| 388 | /* |
| 389 | FUNCTION |
| 390 | bfd_alloc_size |
| 391 | |
| 392 | SYNOPSIS |
| 393 | bfd_size_type bfd_alloc_size(bfd *abfd); |
| 394 | |
| 395 | DESCRIPTION |
| 396 | Return the number of bytes in the obstacks connected to the |
| 397 | supplied BFD. |
| 398 | |
| 399 | */ |
| 400 | |
| 401 | bfd_size_type |
| 402 | DEFUN(bfd_alloc_size,(abfd), |
| 403 | bfd *abfd) |
| 404 | { |
| 405 | struct _obstack_chunk *chunk = abfd->memory.chunk; |
| 406 | size_t size = 0; |
| 407 | while (chunk) { |
| 408 | size += chunk->limit - &(chunk->contents[0]); |
| 409 | chunk = chunk->prev; |
| 410 | } |
| 411 | return size; |
| 412 | } |
| 413 | |
| 414 | |
| 415 | |
| 416 | /* |
| 417 | FUNCTION |
| 418 | bfd_create |
| 419 | |
| 420 | SYNOPSIS |
| 421 | bfd *bfd_create(CONST char *filename, bfd *template); |
| 422 | |
| 423 | DESCRIPTION |
| 424 | This routine creates a new BFD in the manner of |
| 425 | <<bfd_openw>>, but without opening a file. The new BFD |
| 426 | takes the target from the target used by @var{template}. The |
| 427 | format is always set to <<bfd_object>>. |
| 428 | |
| 429 | */ |
| 430 | |
| 431 | bfd * |
| 432 | DEFUN(bfd_create,(filename, template), |
| 433 | CONST char *filename AND |
| 434 | bfd *template) |
| 435 | { |
| 436 | bfd *nbfd = new_bfd(); |
| 437 | if (nbfd == (bfd *)NULL) { |
| 438 | bfd_error = no_memory; |
| 439 | return (bfd *)NULL; |
| 440 | } |
| 441 | nbfd->filename = filename; |
| 442 | if(template) { |
| 443 | nbfd->xvec = template->xvec; |
| 444 | } |
| 445 | nbfd->direction = no_direction; |
| 446 | bfd_set_format(nbfd, bfd_object); |
| 447 | return nbfd; |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | INTERNAL_FUNCTION |
| 452 | bfd_alloc_by_size_t |
| 453 | |
| 454 | SYNOPSIS |
| 455 | PTR bfd_alloc_by_size_t(bfd *abfd, size_t wanted); |
| 456 | |
| 457 | DESCRIPTION |
| 458 | This function allocates a block of memory in the obstack |
| 459 | attatched to <<abfd>> and returns a pointer to it. |
| 460 | */ |
| 461 | |
| 462 | |
| 463 | PTR |
| 464 | DEFUN(bfd_alloc_by_size_t,(abfd, size), |
| 465 | bfd *abfd AND |
| 466 | size_t size) |
| 467 | { |
| 468 | PTR res = obstack_alloc(&(abfd->memory), size); |
| 469 | return res; |
| 470 | } |
| 471 | |
| 472 | DEFUN(void bfd_alloc_grow,(abfd, ptr, size), |
| 473 | bfd *abfd AND |
| 474 | PTR ptr AND |
| 475 | bfd_size_type size) |
| 476 | { |
| 477 | (void) obstack_grow(&(abfd->memory), ptr, size); |
| 478 | } |
| 479 | DEFUN(PTR bfd_alloc_finish,(abfd), |
| 480 | bfd *abfd) |
| 481 | { |
| 482 | return obstack_finish(&(abfd->memory)); |
| 483 | } |
| 484 | |
| 485 | DEFUN(PTR bfd_alloc, (abfd, size), |
| 486 | bfd *abfd AND |
| 487 | bfd_size_type size) |
| 488 | { |
| 489 | return bfd_alloc_by_size_t(abfd, (size_t)size); |
| 490 | } |
| 491 | |
| 492 | DEFUN(PTR bfd_zalloc,(abfd, size), |
| 493 | bfd *abfd AND |
| 494 | bfd_size_type size) |
| 495 | { |
| 496 | PTR res = bfd_alloc(abfd, size); |
| 497 | memset(res, 0, (size_t)size); |
| 498 | return res; |
| 499 | } |
| 500 | |
| 501 | DEFUN(PTR bfd_realloc,(abfd, old, size), |
| 502 | bfd *abfd AND |
| 503 | PTR old AND |
| 504 | bfd_size_type size) |
| 505 | { |
| 506 | PTR res = bfd_alloc(abfd, size); |
| 507 | memcpy(res, old, (size_t)size); |
| 508 | return res; |
| 509 | } |
| 510 | |
| 511 | |
| 512 | |
| 513 | |
| 514 | |
| 515 | |
| 516 | |
| 517 | |
| 518 | |
| 519 | |