| 1 | /* Generic BFD library interface and support routines. |
| 2 | Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999 |
| 3 | Free Software Foundation, Inc. |
| 4 | Written by Cygnus Support. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | /* |
| 23 | SECTION |
| 24 | <<typedef bfd>> |
| 25 | |
| 26 | A BFD has type <<bfd>>; objects of this type are the |
| 27 | cornerstone of any application using BFD. Using BFD |
| 28 | consists of making references though the BFD and to data in the BFD. |
| 29 | |
| 30 | Here is the structure that defines the type <<bfd>>. It |
| 31 | contains the major data about the file and pointers |
| 32 | to the rest of the data. |
| 33 | |
| 34 | CODE_FRAGMENT |
| 35 | . |
| 36 | .struct _bfd |
| 37 | .{ |
| 38 | . {* The filename the application opened the BFD with. *} |
| 39 | . CONST char *filename; |
| 40 | . |
| 41 | . {* A pointer to the target jump table. *} |
| 42 | . const struct bfd_target *xvec; |
| 43 | . |
| 44 | . {* To avoid dragging too many header files into every file that |
| 45 | . includes `<<bfd.h>>', IOSTREAM has been declared as a "char |
| 46 | . *", and MTIME as a "long". Their correct types, to which they |
| 47 | . are cast when used, are "FILE *" and "time_t". The iostream |
| 48 | . is the result of an fopen on the filename. However, if the |
| 49 | . BFD_IN_MEMORY flag is set, then iostream is actually a pointer |
| 50 | . to a bfd_in_memory struct. *} |
| 51 | . PTR iostream; |
| 52 | . |
| 53 | . {* Is the file descriptor being cached? That is, can it be closed as |
| 54 | . needed, and re-opened when accessed later? *} |
| 55 | . |
| 56 | . boolean cacheable; |
| 57 | . |
| 58 | . {* Marks whether there was a default target specified when the |
| 59 | . BFD was opened. This is used to select which matching algorithm |
| 60 | . to use to choose the back end. *} |
| 61 | . |
| 62 | . boolean target_defaulted; |
| 63 | . |
| 64 | . {* The caching routines use these to maintain a |
| 65 | . least-recently-used list of BFDs *} |
| 66 | . |
| 67 | . struct _bfd *lru_prev, *lru_next; |
| 68 | . |
| 69 | . {* When a file is closed by the caching routines, BFD retains |
| 70 | . state information on the file here: *} |
| 71 | . |
| 72 | . file_ptr where; |
| 73 | . |
| 74 | . {* and here: (``once'' means at least once) *} |
| 75 | . |
| 76 | . boolean opened_once; |
| 77 | . |
| 78 | . {* Set if we have a locally maintained mtime value, rather than |
| 79 | . getting it from the file each time: *} |
| 80 | . |
| 81 | . boolean mtime_set; |
| 82 | . |
| 83 | . {* File modified time, if mtime_set is true: *} |
| 84 | . |
| 85 | . long mtime; |
| 86 | . |
| 87 | . {* Reserved for an unimplemented file locking extension.*} |
| 88 | . |
| 89 | . int ifd; |
| 90 | . |
| 91 | . {* The format which belongs to the BFD. (object, core, etc.) *} |
| 92 | . |
| 93 | . bfd_format format; |
| 94 | . |
| 95 | . {* The direction the BFD was opened with*} |
| 96 | . |
| 97 | . enum bfd_direction {no_direction = 0, |
| 98 | . read_direction = 1, |
| 99 | . write_direction = 2, |
| 100 | . both_direction = 3} direction; |
| 101 | . |
| 102 | . {* Format_specific flags*} |
| 103 | . |
| 104 | . flagword flags; |
| 105 | . |
| 106 | . {* Currently my_archive is tested before adding origin to |
| 107 | . anything. I believe that this can become always an add of |
| 108 | . origin, with origin set to 0 for non archive files. *} |
| 109 | . |
| 110 | . file_ptr origin; |
| 111 | . |
| 112 | . {* Remember when output has begun, to stop strange things |
| 113 | . from happening. *} |
| 114 | . boolean output_has_begun; |
| 115 | . |
| 116 | . {* Pointer to linked list of sections*} |
| 117 | . struct sec *sections; |
| 118 | . |
| 119 | . {* The number of sections *} |
| 120 | . unsigned int section_count; |
| 121 | . |
| 122 | . {* Stuff only useful for object files: |
| 123 | . The start address. *} |
| 124 | . bfd_vma start_address; |
| 125 | . |
| 126 | . {* Used for input and output*} |
| 127 | . unsigned int symcount; |
| 128 | . |
| 129 | . {* Symbol table for output BFD (with symcount entries) *} |
| 130 | . struct symbol_cache_entry **outsymbols; |
| 131 | . |
| 132 | . {* Pointer to structure which contains architecture information*} |
| 133 | . const struct bfd_arch_info *arch_info; |
| 134 | . |
| 135 | . {* Stuff only useful for archives:*} |
| 136 | . PTR arelt_data; |
| 137 | . struct _bfd *my_archive; {* The containing archive BFD. *} |
| 138 | . struct _bfd *next; {* The next BFD in the archive. *} |
| 139 | . struct _bfd *archive_head; {* The first BFD in the archive. *} |
| 140 | . boolean has_armap; |
| 141 | . |
| 142 | . {* A chain of BFD structures involved in a link. *} |
| 143 | . struct _bfd *link_next; |
| 144 | . |
| 145 | . {* A field used by _bfd_generic_link_add_archive_symbols. This will |
| 146 | . be used only for archive elements. *} |
| 147 | . int archive_pass; |
| 148 | . |
| 149 | . {* Used by the back end to hold private data. *} |
| 150 | . |
| 151 | . union |
| 152 | . { |
| 153 | . struct aout_data_struct *aout_data; |
| 154 | . struct artdata *aout_ar_data; |
| 155 | . struct _oasys_data *oasys_obj_data; |
| 156 | . struct _oasys_ar_data *oasys_ar_data; |
| 157 | . struct coff_tdata *coff_obj_data; |
| 158 | . struct pe_tdata *pe_obj_data; |
| 159 | . struct xcoff_tdata *xcoff_obj_data; |
| 160 | . struct ecoff_tdata *ecoff_obj_data; |
| 161 | . struct ieee_data_struct *ieee_data; |
| 162 | . struct ieee_ar_data_struct *ieee_ar_data; |
| 163 | . struct srec_data_struct *srec_data; |
| 164 | . struct ihex_data_struct *ihex_data; |
| 165 | . struct tekhex_data_struct *tekhex_data; |
| 166 | . struct elf_obj_tdata *elf_obj_data; |
| 167 | . struct nlm_obj_tdata *nlm_obj_data; |
| 168 | . struct bout_data_struct *bout_data; |
| 169 | . struct sun_core_struct *sun_core_data; |
| 170 | . struct sco5_core_struct *sco5_core_data; |
| 171 | . struct trad_core_struct *trad_core_data; |
| 172 | . struct som_data_struct *som_data; |
| 173 | . struct hpux_core_struct *hpux_core_data; |
| 174 | . struct hppabsd_core_struct *hppabsd_core_data; |
| 175 | . struct sgi_core_struct *sgi_core_data; |
| 176 | . struct lynx_core_struct *lynx_core_data; |
| 177 | . struct osf_core_struct *osf_core_data; |
| 178 | . struct cisco_core_struct *cisco_core_data; |
| 179 | . struct versados_data_struct *versados_data; |
| 180 | . struct netbsd_core_struct *netbsd_core_data; |
| 181 | . PTR any; |
| 182 | . } tdata; |
| 183 | . |
| 184 | . {* Used by the application to hold private data*} |
| 185 | . PTR usrdata; |
| 186 | . |
| 187 | . {* Where all the allocated stuff under this BFD goes. This is a |
| 188 | . struct objalloc *, but we use PTR to avoid requiring the inclusion of |
| 189 | . objalloc.h. *} |
| 190 | . PTR memory; |
| 191 | .}; |
| 192 | . |
| 193 | */ |
| 194 | |
| 195 | #include "bfd.h" |
| 196 | #include "sysdep.h" |
| 197 | |
| 198 | #ifdef ANSI_PROTOTYPES |
| 199 | #include <stdarg.h> |
| 200 | #else |
| 201 | #include <varargs.h> |
| 202 | #endif |
| 203 | |
| 204 | #include "libiberty.h" |
| 205 | #include "bfdlink.h" |
| 206 | #include "libbfd.h" |
| 207 | #include "coff/internal.h" |
| 208 | #include "coff/sym.h" |
| 209 | #include "libcoff.h" |
| 210 | #include "libecoff.h" |
| 211 | #undef obj_symbols |
| 212 | #include "elf-bfd.h" |
| 213 | |
| 214 | #include <ctype.h> |
| 215 | \f |
| 216 | /* provide storage for subsystem, stack and heap data which may have been |
| 217 | passed in on the command line. Ld puts this data into a bfd_link_info |
| 218 | struct which ultimately gets passed in to the bfd. When it arrives, copy |
| 219 | it to the following struct so that the data will be available in coffcode.h |
| 220 | where it is needed. The typedef's used are defined in bfd.h */ |
| 221 | |
| 222 | |
| 223 | \f |
| 224 | /* |
| 225 | SECTION |
| 226 | Error reporting |
| 227 | |
| 228 | Most BFD functions return nonzero on success (check their |
| 229 | individual documentation for precise semantics). On an error, |
| 230 | they call <<bfd_set_error>> to set an error condition that callers |
| 231 | can check by calling <<bfd_get_error>>. |
| 232 | If that returns <<bfd_error_system_call>>, then check |
| 233 | <<errno>>. |
| 234 | |
| 235 | The easiest way to report a BFD error to the user is to |
| 236 | use <<bfd_perror>>. |
| 237 | |
| 238 | SUBSECTION |
| 239 | Type <<bfd_error_type>> |
| 240 | |
| 241 | The values returned by <<bfd_get_error>> are defined by the |
| 242 | enumerated type <<bfd_error_type>>. |
| 243 | |
| 244 | CODE_FRAGMENT |
| 245 | . |
| 246 | .typedef enum bfd_error |
| 247 | .{ |
| 248 | . bfd_error_no_error = 0, |
| 249 | . bfd_error_system_call, |
| 250 | . bfd_error_invalid_target, |
| 251 | . bfd_error_wrong_format, |
| 252 | . bfd_error_invalid_operation, |
| 253 | . bfd_error_no_memory, |
| 254 | . bfd_error_no_symbols, |
| 255 | . bfd_error_no_armap, |
| 256 | . bfd_error_no_more_archived_files, |
| 257 | . bfd_error_malformed_archive, |
| 258 | . bfd_error_file_not_recognized, |
| 259 | . bfd_error_file_ambiguously_recognized, |
| 260 | . bfd_error_no_contents, |
| 261 | . bfd_error_nonrepresentable_section, |
| 262 | . bfd_error_no_debug_section, |
| 263 | . bfd_error_bad_value, |
| 264 | . bfd_error_file_truncated, |
| 265 | . bfd_error_file_too_big, |
| 266 | . bfd_error_invalid_error_code |
| 267 | .} bfd_error_type; |
| 268 | . |
| 269 | */ |
| 270 | |
| 271 | static bfd_error_type bfd_error = bfd_error_no_error; |
| 272 | |
| 273 | CONST char *CONST bfd_errmsgs[] = { |
| 274 | N_("No error"), |
| 275 | N_("System call error"), |
| 276 | N_("Invalid bfd target"), |
| 277 | N_("File in wrong format"), |
| 278 | N_("Invalid operation"), |
| 279 | N_("Memory exhausted"), |
| 280 | N_("No symbols"), |
| 281 | N_("Archive has no index; run ranlib to add one"), |
| 282 | N_("No more archived files"), |
| 283 | N_("Malformed archive"), |
| 284 | N_("File format not recognized"), |
| 285 | N_("File format is ambiguous"), |
| 286 | N_("Section has no contents"), |
| 287 | N_("Nonrepresentable section on output"), |
| 288 | N_("Symbol needs debug section which does not exist"), |
| 289 | N_("Bad value"), |
| 290 | N_("File truncated"), |
| 291 | N_("File too big"), |
| 292 | N_("#<Invalid error code>") |
| 293 | }; |
| 294 | |
| 295 | /* |
| 296 | FUNCTION |
| 297 | bfd_get_error |
| 298 | |
| 299 | SYNOPSIS |
| 300 | bfd_error_type bfd_get_error (void); |
| 301 | |
| 302 | DESCRIPTION |
| 303 | Return the current BFD error condition. |
| 304 | */ |
| 305 | |
| 306 | bfd_error_type |
| 307 | bfd_get_error () |
| 308 | { |
| 309 | return bfd_error; |
| 310 | } |
| 311 | |
| 312 | /* |
| 313 | FUNCTION |
| 314 | bfd_set_error |
| 315 | |
| 316 | SYNOPSIS |
| 317 | void bfd_set_error (bfd_error_type error_tag); |
| 318 | |
| 319 | DESCRIPTION |
| 320 | Set the BFD error condition to be @var{error_tag}. |
| 321 | */ |
| 322 | |
| 323 | void |
| 324 | bfd_set_error (error_tag) |
| 325 | bfd_error_type error_tag; |
| 326 | { |
| 327 | bfd_error = error_tag; |
| 328 | } |
| 329 | |
| 330 | /* |
| 331 | FUNCTION |
| 332 | bfd_errmsg |
| 333 | |
| 334 | SYNOPSIS |
| 335 | CONST char *bfd_errmsg (bfd_error_type error_tag); |
| 336 | |
| 337 | DESCRIPTION |
| 338 | Return a string describing the error @var{error_tag}, or |
| 339 | the system error if @var{error_tag} is <<bfd_error_system_call>>. |
| 340 | */ |
| 341 | |
| 342 | CONST char * |
| 343 | bfd_errmsg (error_tag) |
| 344 | bfd_error_type error_tag; |
| 345 | { |
| 346 | #ifndef errno |
| 347 | extern int errno; |
| 348 | #endif |
| 349 | if (error_tag == bfd_error_system_call) |
| 350 | return xstrerror (errno); |
| 351 | |
| 352 | if ((((int)error_tag <(int) bfd_error_no_error) || |
| 353 | ((int)error_tag > (int)bfd_error_invalid_error_code))) |
| 354 | error_tag = bfd_error_invalid_error_code;/* sanity check */ |
| 355 | |
| 356 | return _(bfd_errmsgs [(int)error_tag]); |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | FUNCTION |
| 361 | bfd_perror |
| 362 | |
| 363 | SYNOPSIS |
| 364 | void bfd_perror (CONST char *message); |
| 365 | |
| 366 | DESCRIPTION |
| 367 | Print to the standard error stream a string describing the |
| 368 | last BFD error that occurred, or the last system error if |
| 369 | the last BFD error was a system call failure. If @var{message} |
| 370 | is non-NULL and non-empty, the error string printed is preceded |
| 371 | by @var{message}, a colon, and a space. It is followed by a newline. |
| 372 | */ |
| 373 | |
| 374 | void |
| 375 | bfd_perror (message) |
| 376 | CONST char *message; |
| 377 | { |
| 378 | if (bfd_get_error () == bfd_error_system_call) |
| 379 | perror((char *)message); /* must be system error then... */ |
| 380 | else { |
| 381 | if (message == NULL || *message == '\0') |
| 382 | fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ())); |
| 383 | else |
| 384 | fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ())); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | SUBSECTION |
| 390 | BFD error handler |
| 391 | |
| 392 | Some BFD functions want to print messages describing the |
| 393 | problem. They call a BFD error handler function. This |
| 394 | function may be overriden by the program. |
| 395 | |
| 396 | The BFD error handler acts like printf. |
| 397 | |
| 398 | CODE_FRAGMENT |
| 399 | . |
| 400 | .typedef void (*bfd_error_handler_type) PARAMS ((const char *, ...)); |
| 401 | . |
| 402 | */ |
| 403 | |
| 404 | /* The program name used when printing BFD error messages. */ |
| 405 | |
| 406 | static const char *_bfd_error_program_name; |
| 407 | |
| 408 | /* This is the default routine to handle BFD error messages. */ |
| 409 | |
| 410 | #ifdef ANSI_PROTOTYPES |
| 411 | |
| 412 | static void _bfd_default_error_handler PARAMS ((const char *s, ...)); |
| 413 | |
| 414 | static void |
| 415 | _bfd_default_error_handler (const char *s, ...) |
| 416 | { |
| 417 | va_list p; |
| 418 | |
| 419 | if (_bfd_error_program_name != NULL) |
| 420 | fprintf (stderr, "%s: ", _bfd_error_program_name); |
| 421 | else |
| 422 | fprintf (stderr, "BFD: "); |
| 423 | |
| 424 | va_start (p, s); |
| 425 | |
| 426 | vfprintf (stderr, s, p); |
| 427 | |
| 428 | va_end (p); |
| 429 | |
| 430 | fprintf (stderr, "\n"); |
| 431 | } |
| 432 | |
| 433 | #else /* ! defined (ANSI_PROTOTYPES) */ |
| 434 | |
| 435 | static void _bfd_default_error_handler (); |
| 436 | |
| 437 | static void |
| 438 | _bfd_default_error_handler (va_alist) |
| 439 | va_dcl |
| 440 | { |
| 441 | va_list p; |
| 442 | const char *s; |
| 443 | |
| 444 | if (_bfd_error_program_name != NULL) |
| 445 | fprintf (stderr, "%s: ", _bfd_error_program_name); |
| 446 | else |
| 447 | fprintf (stderr, "BFD: "); |
| 448 | |
| 449 | va_start (p); |
| 450 | |
| 451 | s = va_arg (p, const char *); |
| 452 | vfprintf (stderr, s, p); |
| 453 | |
| 454 | va_end (p); |
| 455 | |
| 456 | fprintf (stderr, "\n"); |
| 457 | } |
| 458 | |
| 459 | #endif /* ! defined (ANSI_PROTOTYPES) */ |
| 460 | |
| 461 | /* This is a function pointer to the routine which should handle BFD |
| 462 | error messages. It is called when a BFD routine encounters an |
| 463 | error for which it wants to print a message. Going through a |
| 464 | function pointer permits a program linked against BFD to intercept |
| 465 | the messages and deal with them itself. */ |
| 466 | |
| 467 | bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler; |
| 468 | |
| 469 | /* |
| 470 | FUNCTION |
| 471 | bfd_set_error_handler |
| 472 | |
| 473 | SYNOPSIS |
| 474 | bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type); |
| 475 | |
| 476 | DESCRIPTION |
| 477 | Set the BFD error handler function. Returns the previous |
| 478 | function. |
| 479 | */ |
| 480 | |
| 481 | bfd_error_handler_type |
| 482 | bfd_set_error_handler (pnew) |
| 483 | bfd_error_handler_type pnew; |
| 484 | { |
| 485 | bfd_error_handler_type pold; |
| 486 | |
| 487 | pold = _bfd_error_handler; |
| 488 | _bfd_error_handler = pnew; |
| 489 | return pold; |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | FUNCTION |
| 494 | bfd_set_error_program_name |
| 495 | |
| 496 | SYNOPSIS |
| 497 | void bfd_set_error_program_name (const char *); |
| 498 | |
| 499 | DESCRIPTION |
| 500 | Set the program name to use when printing a BFD error. This |
| 501 | is printed before the error message followed by a colon and |
| 502 | space. The string must not be changed after it is passed to |
| 503 | this function. |
| 504 | */ |
| 505 | |
| 506 | void |
| 507 | bfd_set_error_program_name (name) |
| 508 | const char *name; |
| 509 | { |
| 510 | _bfd_error_program_name = name; |
| 511 | } |
| 512 | |
| 513 | |
| 514 | /* |
| 515 | FUNCTION |
| 516 | bfd_get_error_handler |
| 517 | |
| 518 | SYNOPSIS |
| 519 | bfd_error_handler_type bfd_get_error_handler (void); |
| 520 | |
| 521 | DESCRIPTION |
| 522 | Return the BFD error handler function. |
| 523 | */ |
| 524 | |
| 525 | bfd_error_handler_type |
| 526 | bfd_get_error_handler () |
| 527 | { |
| 528 | return _bfd_error_handler; |
| 529 | } |
| 530 | \f |
| 531 | /* |
| 532 | SECTION |
| 533 | Symbols |
| 534 | */ |
| 535 | |
| 536 | /* |
| 537 | FUNCTION |
| 538 | bfd_get_reloc_upper_bound |
| 539 | |
| 540 | SYNOPSIS |
| 541 | long bfd_get_reloc_upper_bound(bfd *abfd, asection *sect); |
| 542 | |
| 543 | DESCRIPTION |
| 544 | Return the number of bytes required to store the |
| 545 | relocation information associated with section @var{sect} |
| 546 | attached to bfd @var{abfd}. If an error occurs, return -1. |
| 547 | |
| 548 | */ |
| 549 | |
| 550 | |
| 551 | long |
| 552 | bfd_get_reloc_upper_bound (abfd, asect) |
| 553 | bfd *abfd; |
| 554 | sec_ptr asect; |
| 555 | { |
| 556 | if (abfd->format != bfd_object) { |
| 557 | bfd_set_error (bfd_error_invalid_operation); |
| 558 | return -1; |
| 559 | } |
| 560 | |
| 561 | return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect)); |
| 562 | } |
| 563 | |
| 564 | /* |
| 565 | FUNCTION |
| 566 | bfd_canonicalize_reloc |
| 567 | |
| 568 | SYNOPSIS |
| 569 | long bfd_canonicalize_reloc |
| 570 | (bfd *abfd, |
| 571 | asection *sec, |
| 572 | arelent **loc, |
| 573 | asymbol **syms); |
| 574 | |
| 575 | DESCRIPTION |
| 576 | Call the back end associated with the open BFD |
| 577 | @var{abfd} and translate the external form of the relocation |
| 578 | information attached to @var{sec} into the internal canonical |
| 579 | form. Place the table into memory at @var{loc}, which has |
| 580 | been preallocated, usually by a call to |
| 581 | <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or |
| 582 | -1 on error. |
| 583 | |
| 584 | The @var{syms} table is also needed for horrible internal magic |
| 585 | reasons. |
| 586 | |
| 587 | |
| 588 | */ |
| 589 | long |
| 590 | bfd_canonicalize_reloc (abfd, asect, location, symbols) |
| 591 | bfd *abfd; |
| 592 | sec_ptr asect; |
| 593 | arelent **location; |
| 594 | asymbol **symbols; |
| 595 | { |
| 596 | if (abfd->format != bfd_object) { |
| 597 | bfd_set_error (bfd_error_invalid_operation); |
| 598 | return -1; |
| 599 | } |
| 600 | return BFD_SEND (abfd, _bfd_canonicalize_reloc, |
| 601 | (abfd, asect, location, symbols)); |
| 602 | } |
| 603 | |
| 604 | /* |
| 605 | FUNCTION |
| 606 | bfd_set_reloc |
| 607 | |
| 608 | SYNOPSIS |
| 609 | void bfd_set_reloc |
| 610 | (bfd *abfd, asection *sec, arelent **rel, unsigned int count) |
| 611 | |
| 612 | DESCRIPTION |
| 613 | Set the relocation pointer and count within |
| 614 | section @var{sec} to the values @var{rel} and @var{count}. |
| 615 | The argument @var{abfd} is ignored. |
| 616 | |
| 617 | */ |
| 618 | /*ARGSUSED*/ |
| 619 | void |
| 620 | bfd_set_reloc (ignore_abfd, asect, location, count) |
| 621 | bfd *ignore_abfd ATTRIBUTE_UNUSED; |
| 622 | sec_ptr asect; |
| 623 | arelent **location; |
| 624 | unsigned int count; |
| 625 | { |
| 626 | asect->orelocation = location; |
| 627 | asect->reloc_count = count; |
| 628 | } |
| 629 | |
| 630 | /* |
| 631 | FUNCTION |
| 632 | bfd_set_file_flags |
| 633 | |
| 634 | SYNOPSIS |
| 635 | boolean bfd_set_file_flags(bfd *abfd, flagword flags); |
| 636 | |
| 637 | DESCRIPTION |
| 638 | Set the flag word in the BFD @var{abfd} to the value @var{flags}. |
| 639 | |
| 640 | Possible errors are: |
| 641 | o <<bfd_error_wrong_format>> - The target bfd was not of object format. |
| 642 | o <<bfd_error_invalid_operation>> - The target bfd was open for reading. |
| 643 | o <<bfd_error_invalid_operation>> - |
| 644 | The flag word contained a bit which was not applicable to the |
| 645 | type of file. E.g., an attempt was made to set the <<D_PAGED>> bit |
| 646 | on a BFD format which does not support demand paging. |
| 647 | |
| 648 | */ |
| 649 | |
| 650 | boolean |
| 651 | bfd_set_file_flags (abfd, flags) |
| 652 | bfd *abfd; |
| 653 | flagword flags; |
| 654 | { |
| 655 | if (abfd->format != bfd_object) { |
| 656 | bfd_set_error (bfd_error_wrong_format); |
| 657 | return false; |
| 658 | } |
| 659 | |
| 660 | if (bfd_read_p (abfd)) { |
| 661 | bfd_set_error (bfd_error_invalid_operation); |
| 662 | return false; |
| 663 | } |
| 664 | |
| 665 | bfd_get_file_flags (abfd) = flags; |
| 666 | if ((flags & bfd_applicable_file_flags (abfd)) != flags) { |
| 667 | bfd_set_error (bfd_error_invalid_operation); |
| 668 | return false; |
| 669 | } |
| 670 | |
| 671 | return true; |
| 672 | } |
| 673 | |
| 674 | void |
| 675 | bfd_assert (file, line) |
| 676 | const char *file; |
| 677 | int line; |
| 678 | { |
| 679 | (*_bfd_error_handler) (_("bfd assertion fail %s:%d"), file, line); |
| 680 | } |
| 681 | |
| 682 | |
| 683 | /* |
| 684 | FUNCTION |
| 685 | bfd_set_start_address |
| 686 | |
| 687 | SYNOPSIS |
| 688 | boolean bfd_set_start_address(bfd *abfd, bfd_vma vma); |
| 689 | |
| 690 | DESCRIPTION |
| 691 | Make @var{vma} the entry point of output BFD @var{abfd}. |
| 692 | |
| 693 | RETURNS |
| 694 | Returns <<true>> on success, <<false>> otherwise. |
| 695 | */ |
| 696 | |
| 697 | boolean |
| 698 | bfd_set_start_address(abfd, vma) |
| 699 | bfd *abfd; |
| 700 | bfd_vma vma; |
| 701 | { |
| 702 | abfd->start_address = vma; |
| 703 | return true; |
| 704 | } |
| 705 | |
| 706 | |
| 707 | /* |
| 708 | FUNCTION |
| 709 | bfd_get_mtime |
| 710 | |
| 711 | SYNOPSIS |
| 712 | long bfd_get_mtime(bfd *abfd); |
| 713 | |
| 714 | DESCRIPTION |
| 715 | Return the file modification time (as read from the file system, or |
| 716 | from the archive header for archive members). |
| 717 | |
| 718 | */ |
| 719 | |
| 720 | long |
| 721 | bfd_get_mtime (abfd) |
| 722 | bfd *abfd; |
| 723 | { |
| 724 | FILE *fp; |
| 725 | struct stat buf; |
| 726 | |
| 727 | if (abfd->mtime_set) |
| 728 | return abfd->mtime; |
| 729 | |
| 730 | fp = bfd_cache_lookup (abfd); |
| 731 | if (0 != fstat (fileno (fp), &buf)) |
| 732 | return 0; |
| 733 | |
| 734 | abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */ |
| 735 | return buf.st_mtime; |
| 736 | } |
| 737 | |
| 738 | /* |
| 739 | FUNCTION |
| 740 | bfd_get_size |
| 741 | |
| 742 | SYNOPSIS |
| 743 | long bfd_get_size(bfd *abfd); |
| 744 | |
| 745 | DESCRIPTION |
| 746 | Return the file size (as read from file system) for the file |
| 747 | associated with BFD @var{abfd}. |
| 748 | |
| 749 | The initial motivation for, and use of, this routine is not |
| 750 | so we can get the exact size of the object the BFD applies to, since |
| 751 | that might not be generally possible (archive members for example). |
| 752 | It would be ideal if someone could eventually modify |
| 753 | it so that such results were guaranteed. |
| 754 | |
| 755 | Instead, we want to ask questions like "is this NNN byte sized |
| 756 | object I'm about to try read from file offset YYY reasonable?" |
| 757 | As as example of where we might do this, some object formats |
| 758 | use string tables for which the first <<sizeof(long)>> bytes of the |
| 759 | table contain the size of the table itself, including the size bytes. |
| 760 | If an application tries to read what it thinks is one of these |
| 761 | string tables, without some way to validate the size, and for |
| 762 | some reason the size is wrong (byte swapping error, wrong location |
| 763 | for the string table, etc.), the only clue is likely to be a read |
| 764 | error when it tries to read the table, or a "virtual memory |
| 765 | exhausted" error when it tries to allocate 15 bazillon bytes |
| 766 | of space for the 15 bazillon byte table it is about to read. |
| 767 | This function at least allows us to answer the quesion, "is the |
| 768 | size reasonable?". |
| 769 | */ |
| 770 | |
| 771 | long |
| 772 | bfd_get_size (abfd) |
| 773 | bfd *abfd; |
| 774 | { |
| 775 | FILE *fp; |
| 776 | struct stat buf; |
| 777 | |
| 778 | if ((abfd->flags & BFD_IN_MEMORY) != 0) |
| 779 | return ((struct bfd_in_memory *) abfd->iostream)->size; |
| 780 | |
| 781 | fp = bfd_cache_lookup (abfd); |
| 782 | if (0 != fstat (fileno (fp), &buf)) |
| 783 | return 0; |
| 784 | |
| 785 | return buf.st_size; |
| 786 | } |
| 787 | |
| 788 | /* |
| 789 | FUNCTION |
| 790 | bfd_get_gp_size |
| 791 | |
| 792 | SYNOPSIS |
| 793 | int bfd_get_gp_size(bfd *abfd); |
| 794 | |
| 795 | DESCRIPTION |
| 796 | Return the maximum size of objects to be optimized using the GP |
| 797 | register under MIPS ECOFF. This is typically set by the <<-G>> |
| 798 | argument to the compiler, assembler or linker. |
| 799 | */ |
| 800 | |
| 801 | int |
| 802 | bfd_get_gp_size (abfd) |
| 803 | bfd *abfd; |
| 804 | { |
| 805 | if (abfd->format == bfd_object) |
| 806 | { |
| 807 | if (abfd->xvec->flavour == bfd_target_ecoff_flavour) |
| 808 | return ecoff_data (abfd)->gp_size; |
| 809 | else if (abfd->xvec->flavour == bfd_target_elf_flavour) |
| 810 | return elf_gp_size (abfd); |
| 811 | } |
| 812 | return 0; |
| 813 | } |
| 814 | |
| 815 | /* |
| 816 | FUNCTION |
| 817 | bfd_set_gp_size |
| 818 | |
| 819 | SYNOPSIS |
| 820 | void bfd_set_gp_size(bfd *abfd, int i); |
| 821 | |
| 822 | DESCRIPTION |
| 823 | Set the maximum size of objects to be optimized using the GP |
| 824 | register under ECOFF or MIPS ELF. This is typically set by |
| 825 | the <<-G>> argument to the compiler, assembler or linker. |
| 826 | */ |
| 827 | |
| 828 | void |
| 829 | bfd_set_gp_size (abfd, i) |
| 830 | bfd *abfd; |
| 831 | int i; |
| 832 | { |
| 833 | /* Don't try to set GP size on an archive or core file! */ |
| 834 | if (abfd->format != bfd_object) |
| 835 | return; |
| 836 | if (abfd->xvec->flavour == bfd_target_ecoff_flavour) |
| 837 | ecoff_data (abfd)->gp_size = i; |
| 838 | else if (abfd->xvec->flavour == bfd_target_elf_flavour) |
| 839 | elf_gp_size (abfd) = i; |
| 840 | } |
| 841 | |
| 842 | /* Get the GP value. This is an internal function used by some of the |
| 843 | relocation special_function routines on targets which support a GP |
| 844 | register. */ |
| 845 | |
| 846 | bfd_vma |
| 847 | _bfd_get_gp_value (abfd) |
| 848 | bfd *abfd; |
| 849 | { |
| 850 | if (abfd->format == bfd_object) |
| 851 | { |
| 852 | if (abfd->xvec->flavour == bfd_target_ecoff_flavour) |
| 853 | return ecoff_data (abfd)->gp; |
| 854 | else if (abfd->xvec->flavour == bfd_target_elf_flavour) |
| 855 | return elf_gp (abfd); |
| 856 | } |
| 857 | return 0; |
| 858 | } |
| 859 | |
| 860 | /* Set the GP value. */ |
| 861 | |
| 862 | void |
| 863 | _bfd_set_gp_value (abfd, v) |
| 864 | bfd *abfd; |
| 865 | bfd_vma v; |
| 866 | { |
| 867 | if (abfd->format != bfd_object) |
| 868 | return; |
| 869 | if (abfd->xvec->flavour == bfd_target_ecoff_flavour) |
| 870 | ecoff_data (abfd)->gp = v; |
| 871 | else if (abfd->xvec->flavour == bfd_target_elf_flavour) |
| 872 | elf_gp (abfd) = v; |
| 873 | } |
| 874 | |
| 875 | /* |
| 876 | FUNCTION |
| 877 | bfd_scan_vma |
| 878 | |
| 879 | SYNOPSIS |
| 880 | bfd_vma bfd_scan_vma(CONST char *string, CONST char **end, int base); |
| 881 | |
| 882 | DESCRIPTION |
| 883 | Convert, like <<strtoul>>, a numerical expression |
| 884 | @var{string} into a <<bfd_vma>> integer, and return that integer. |
| 885 | (Though without as many bells and whistles as <<strtoul>>.) |
| 886 | The expression is assumed to be unsigned (i.e., positive). |
| 887 | If given a @var{base}, it is used as the base for conversion. |
| 888 | A base of 0 causes the function to interpret the string |
| 889 | in hex if a leading "0x" or "0X" is found, otherwise |
| 890 | in octal if a leading zero is found, otherwise in decimal. |
| 891 | |
| 892 | Overflow is not detected. |
| 893 | */ |
| 894 | |
| 895 | bfd_vma |
| 896 | bfd_scan_vma (string, end, base) |
| 897 | CONST char *string; |
| 898 | CONST char **end; |
| 899 | int base; |
| 900 | { |
| 901 | bfd_vma value; |
| 902 | int digit; |
| 903 | |
| 904 | /* Let the host do it if possible. */ |
| 905 | if (sizeof(bfd_vma) <= sizeof(unsigned long)) |
| 906 | return (bfd_vma) strtoul (string, (char **) end, base); |
| 907 | |
| 908 | /* A negative base makes no sense, and we only need to go as high as hex. */ |
| 909 | if ((base < 0) || (base > 16)) |
| 910 | return (bfd_vma) 0; |
| 911 | |
| 912 | if (base == 0) |
| 913 | { |
| 914 | if (string[0] == '0') |
| 915 | { |
| 916 | if ((string[1] == 'x') || (string[1] == 'X')) |
| 917 | base = 16; |
| 918 | /* XXX should we also allow "0b" or "0B" to set base to 2? */ |
| 919 | else |
| 920 | base = 8; |
| 921 | } |
| 922 | else |
| 923 | base = 10; |
| 924 | } |
| 925 | if ((base == 16) && |
| 926 | (string[0] == '0') && ((string[1] == 'x') || (string[1] == 'X'))) |
| 927 | string += 2; |
| 928 | /* XXX should we also skip over "0b" or "0B" if base is 2? */ |
| 929 | |
| 930 | /* Speed could be improved with a table like hex_value[] in gas. */ |
| 931 | #define HEX_VALUE(c) \ |
| 932 | (isxdigit ((unsigned char) c) \ |
| 933 | ? (isdigit ((unsigned char) c) \ |
| 934 | ? (c - '0') \ |
| 935 | : (10 + c - (islower ((unsigned char) c) ? 'a' : 'A'))) \ |
| 936 | : 42) |
| 937 | |
| 938 | for (value = 0; (digit = HEX_VALUE(*string)) < base; string++) |
| 939 | { |
| 940 | value = value * base + digit; |
| 941 | } |
| 942 | |
| 943 | if (end) |
| 944 | *end = string; |
| 945 | |
| 946 | return value; |
| 947 | } |
| 948 | |
| 949 | /* |
| 950 | FUNCTION |
| 951 | bfd_copy_private_bfd_data |
| 952 | |
| 953 | SYNOPSIS |
| 954 | boolean bfd_copy_private_bfd_data(bfd *ibfd, bfd *obfd); |
| 955 | |
| 956 | DESCRIPTION |
| 957 | Copy private BFD information from the BFD @var{ibfd} to the |
| 958 | the BFD @var{obfd}. Return <<true>> on success, <<false>> on error. |
| 959 | Possible error returns are: |
| 960 | |
| 961 | o <<bfd_error_no_memory>> - |
| 962 | Not enough memory exists to create private data for @var{obfd}. |
| 963 | |
| 964 | .#define bfd_copy_private_bfd_data(ibfd, obfd) \ |
| 965 | . BFD_SEND (obfd, _bfd_copy_private_bfd_data, \ |
| 966 | . (ibfd, obfd)) |
| 967 | |
| 968 | */ |
| 969 | |
| 970 | /* |
| 971 | FUNCTION |
| 972 | bfd_merge_private_bfd_data |
| 973 | |
| 974 | SYNOPSIS |
| 975 | boolean bfd_merge_private_bfd_data(bfd *ibfd, bfd *obfd); |
| 976 | |
| 977 | DESCRIPTION |
| 978 | Merge private BFD information from the BFD @var{ibfd} to the |
| 979 | the output file BFD @var{obfd} when linking. Return <<true>> |
| 980 | on success, <<false>> on error. Possible error returns are: |
| 981 | |
| 982 | o <<bfd_error_no_memory>> - |
| 983 | Not enough memory exists to create private data for @var{obfd}. |
| 984 | |
| 985 | .#define bfd_merge_private_bfd_data(ibfd, obfd) \ |
| 986 | . BFD_SEND (obfd, _bfd_merge_private_bfd_data, \ |
| 987 | . (ibfd, obfd)) |
| 988 | |
| 989 | */ |
| 990 | |
| 991 | /* |
| 992 | FUNCTION |
| 993 | bfd_set_private_flags |
| 994 | |
| 995 | SYNOPSIS |
| 996 | boolean bfd_set_private_flags(bfd *abfd, flagword flags); |
| 997 | |
| 998 | DESCRIPTION |
| 999 | Set private BFD flag information in the BFD @var{abfd}. |
| 1000 | Return <<true>> on success, <<false>> on error. Possible error |
| 1001 | returns are: |
| 1002 | |
| 1003 | o <<bfd_error_no_memory>> - |
| 1004 | Not enough memory exists to create private data for @var{obfd}. |
| 1005 | |
| 1006 | .#define bfd_set_private_flags(abfd, flags) \ |
| 1007 | . BFD_SEND (abfd, _bfd_set_private_flags, \ |
| 1008 | . (abfd, flags)) |
| 1009 | |
| 1010 | */ |
| 1011 | |
| 1012 | /* |
| 1013 | FUNCTION |
| 1014 | stuff |
| 1015 | |
| 1016 | DESCRIPTION |
| 1017 | Stuff which should be documented: |
| 1018 | |
| 1019 | .#define bfd_sizeof_headers(abfd, reloc) \ |
| 1020 | . BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc)) |
| 1021 | . |
| 1022 | .#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \ |
| 1023 | . BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, sec, syms, off, file, func, line)) |
| 1024 | . |
| 1025 | . {* Do these three do anything useful at all, for any back end? *} |
| 1026 | .#define bfd_debug_info_start(abfd) \ |
| 1027 | . BFD_SEND (abfd, _bfd_debug_info_start, (abfd)) |
| 1028 | . |
| 1029 | .#define bfd_debug_info_end(abfd) \ |
| 1030 | . BFD_SEND (abfd, _bfd_debug_info_end, (abfd)) |
| 1031 | . |
| 1032 | .#define bfd_debug_info_accumulate(abfd, section) \ |
| 1033 | . BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section)) |
| 1034 | . |
| 1035 | . |
| 1036 | .#define bfd_stat_arch_elt(abfd, stat) \ |
| 1037 | . BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat)) |
| 1038 | . |
| 1039 | .#define bfd_update_armap_timestamp(abfd) \ |
| 1040 | . BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd)) |
| 1041 | . |
| 1042 | .#define bfd_set_arch_mach(abfd, arch, mach)\ |
| 1043 | . BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach)) |
| 1044 | . |
| 1045 | .#define bfd_relax_section(abfd, section, link_info, again) \ |
| 1046 | . BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again)) |
| 1047 | . |
| 1048 | .#define bfd_gc_sections(abfd, link_info) \ |
| 1049 | . BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info)) |
| 1050 | . |
| 1051 | .#define bfd_link_hash_table_create(abfd) \ |
| 1052 | . BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd)) |
| 1053 | . |
| 1054 | .#define bfd_link_add_symbols(abfd, info) \ |
| 1055 | . BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info)) |
| 1056 | . |
| 1057 | .#define bfd_final_link(abfd, info) \ |
| 1058 | . BFD_SEND (abfd, _bfd_final_link, (abfd, info)) |
| 1059 | . |
| 1060 | .#define bfd_free_cached_info(abfd) \ |
| 1061 | . BFD_SEND (abfd, _bfd_free_cached_info, (abfd)) |
| 1062 | . |
| 1063 | .#define bfd_get_dynamic_symtab_upper_bound(abfd) \ |
| 1064 | . BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd)) |
| 1065 | . |
| 1066 | .#define bfd_print_private_bfd_data(abfd, file)\ |
| 1067 | . BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file)) |
| 1068 | . |
| 1069 | .#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \ |
| 1070 | . BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols)) |
| 1071 | . |
| 1072 | .#define bfd_get_dynamic_reloc_upper_bound(abfd) \ |
| 1073 | . BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd)) |
| 1074 | . |
| 1075 | .#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \ |
| 1076 | . BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms)) |
| 1077 | . |
| 1078 | .extern bfd_byte *bfd_get_relocated_section_contents |
| 1079 | . PARAMS ((bfd *, struct bfd_link_info *, |
| 1080 | . struct bfd_link_order *, bfd_byte *, |
| 1081 | . boolean, asymbol **)); |
| 1082 | . |
| 1083 | |
| 1084 | */ |
| 1085 | |
| 1086 | bfd_byte * |
| 1087 | bfd_get_relocated_section_contents (abfd, link_info, link_order, data, |
| 1088 | relocateable, symbols) |
| 1089 | bfd *abfd; |
| 1090 | struct bfd_link_info *link_info; |
| 1091 | struct bfd_link_order *link_order; |
| 1092 | bfd_byte *data; |
| 1093 | boolean relocateable; |
| 1094 | asymbol **symbols; |
| 1095 | { |
| 1096 | bfd *abfd2; |
| 1097 | bfd_byte *(*fn) PARAMS ((bfd *, struct bfd_link_info *, |
| 1098 | struct bfd_link_order *, bfd_byte *, boolean, |
| 1099 | asymbol **)); |
| 1100 | |
| 1101 | if (link_order->type == bfd_indirect_link_order) |
| 1102 | { |
| 1103 | abfd2 = link_order->u.indirect.section->owner; |
| 1104 | if (abfd2 == 0) |
| 1105 | abfd2 = abfd; |
| 1106 | } |
| 1107 | else |
| 1108 | abfd2 = abfd; |
| 1109 | fn = abfd2->xvec->_bfd_get_relocated_section_contents; |
| 1110 | |
| 1111 | return (*fn) (abfd, link_info, link_order, data, relocateable, symbols); |
| 1112 | } |
| 1113 | |
| 1114 | /* Record information about an ELF program header. */ |
| 1115 | |
| 1116 | boolean |
| 1117 | bfd_record_phdr (abfd, type, flags_valid, flags, at_valid, at, |
| 1118 | includes_filehdr, includes_phdrs, count, secs) |
| 1119 | bfd *abfd; |
| 1120 | unsigned long type; |
| 1121 | boolean flags_valid; |
| 1122 | flagword flags; |
| 1123 | boolean at_valid; |
| 1124 | bfd_vma at; |
| 1125 | boolean includes_filehdr; |
| 1126 | boolean includes_phdrs; |
| 1127 | unsigned int count; |
| 1128 | asection **secs; |
| 1129 | { |
| 1130 | struct elf_segment_map *m, **pm; |
| 1131 | |
| 1132 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
| 1133 | return true; |
| 1134 | |
| 1135 | m = ((struct elf_segment_map *) |
| 1136 | bfd_alloc (abfd, |
| 1137 | (sizeof (struct elf_segment_map) |
| 1138 | + ((size_t) count - 1) * sizeof (asection *)))); |
| 1139 | if (m == NULL) |
| 1140 | return false; |
| 1141 | |
| 1142 | m->next = NULL; |
| 1143 | m->p_type = type; |
| 1144 | m->p_flags = flags; |
| 1145 | m->p_paddr = at; |
| 1146 | m->p_flags_valid = flags_valid; |
| 1147 | m->p_paddr_valid = at_valid; |
| 1148 | m->includes_filehdr = includes_filehdr; |
| 1149 | m->includes_phdrs = includes_phdrs; |
| 1150 | m->count = count; |
| 1151 | if (count > 0) |
| 1152 | memcpy (m->sections, secs, count * sizeof (asection *)); |
| 1153 | |
| 1154 | for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) |
| 1155 | ; |
| 1156 | *pm = m; |
| 1157 | |
| 1158 | return true; |
| 1159 | } |