1 /* Generic BFD library interface and support routines. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001, 2002, 2003 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 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 2 of the License, or 12 (at your option) any later version. 13 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. 18 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 22 23 /* 24 SECTION 25 <<typedef bfd>> 26 27 A BFD has type <<bfd>>; objects of this type are the 28 cornerstone of any application using BFD. Using BFD 29 consists of making references though the BFD and to data in the BFD. 30 31 Here is the structure that defines the type <<bfd>>. It 32 contains the major data about the file and pointers 33 to the rest of the data. 34 35 CODE_FRAGMENT 36 . 37 .struct bfd 38 .{ 39 . {* A unique identifier of the BFD *} 40 . unsigned int id; 41 . 42 . {* The filename the application opened the BFD with. *} 43 . const char *filename; 44 . 45 . {* A pointer to the target jump table. *} 46 . const struct bfd_target *xvec; 47 . 48 . {* To avoid dragging too many header files into every file that 49 . includes `<<bfd.h>>', IOSTREAM has been declared as a "char *", 50 . and MTIME as a "long". Their correct types, to which they 51 . are cast when used, are "FILE *" and "time_t". The iostream 52 . is the result of an fopen on the filename. However, if the 53 . BFD_IN_MEMORY flag is set, then iostream is actually a pointer 54 . to a bfd_in_memory struct. *} 55 . void *iostream; 56 . 57 . {* Is the file descriptor being cached? That is, can it be closed as 58 . needed, and re-opened when accessed later? *} 59 . bfd_boolean cacheable; 60 . 61 . {* Marks whether there was a default target specified when the 62 . BFD was opened. This is used to select which matching algorithm 63 . to use to choose the back end. *} 64 . bfd_boolean target_defaulted; 65 . 66 . {* The caching routines use these to maintain a 67 . least-recently-used list of BFDs. *} 68 . struct bfd *lru_prev, *lru_next; 69 . 70 . {* When a file is closed by the caching routines, BFD retains 71 . state information on the file here... *} 72 . ufile_ptr where; 73 . 74 . {* ... and here: (``once'' means at least once). *} 75 . bfd_boolean opened_once; 76 . 77 . {* Set if we have a locally maintained mtime value, rather than 78 . getting it from the file each time. *} 79 . bfd_boolean mtime_set; 80 . 81 . {* File modified time, if mtime_set is TRUE. *} 82 . long mtime; 83 . 84 . {* Reserved for an unimplemented file locking extension. *} 85 . int ifd; 86 . 87 . {* The format which belongs to the BFD. (object, core, etc.) *} 88 . bfd_format format; 89 . 90 . {* The direction with which the BFD was opened. *} 91 . enum bfd_direction 92 . { 93 . no_direction = 0, 94 . read_direction = 1, 95 . write_direction = 2, 96 . both_direction = 3 97 . } 98 . direction; 99 . 100 . {* Format_specific flags. *} 101 . flagword flags; 102 . 103 . {* Currently my_archive is tested before adding origin to 104 . anything. I believe that this can become always an add of 105 . origin, with origin set to 0 for non archive files. *} 106 . ufile_ptr origin; 107 . 108 . {* Remember when output has begun, to stop strange things 109 . from happening. *} 110 . bfd_boolean output_has_begun; 111 . 112 . {* A hash table for section names. *} 113 . struct bfd_hash_table section_htab; 114 . 115 . {* Pointer to linked list of sections. *} 116 . struct bfd_section *sections; 117 . 118 . {* The place where we add to the section list. *} 119 . struct bfd_section **section_tail; 120 . 121 . {* The number of sections. *} 122 . unsigned int section_count; 123 . 124 . {* Stuff only useful for object files: 125 . The start address. *} 126 . bfd_vma start_address; 127 . 128 . {* Used for input and output. *} 129 . unsigned int symcount; 130 . 131 . {* Symbol table for output BFD (with symcount entries). *} 132 . struct bfd_symbol **outsymbols; 133 . 134 . {* Used for slurped dynamic symbol tables. *} 135 . unsigned int dynsymcount; 136 . 137 . {* Pointer to structure which contains architecture information. *} 138 . const struct bfd_arch_info *arch_info; 139 . 140 . {* Stuff only useful for archives. *} 141 . void *arelt_data; 142 . struct bfd *my_archive; {* The containing archive BFD. *} 143 . struct bfd *next; {* The next BFD in the archive. *} 144 . struct bfd *archive_head; {* The first BFD in the archive. *} 145 . bfd_boolean has_armap; 146 . 147 . {* A chain of BFD structures involved in a link. *} 148 . struct bfd *link_next; 149 . 150 . {* A field used by _bfd_generic_link_add_archive_symbols. This will 151 . be used only for archive elements. *} 152 . int archive_pass; 153 . 154 . {* Used by the back end to hold private data. *} 155 . union 156 . { 157 . struct aout_data_struct *aout_data; 158 . struct artdata *aout_ar_data; 159 . struct _oasys_data *oasys_obj_data; 160 . struct _oasys_ar_data *oasys_ar_data; 161 . struct coff_tdata *coff_obj_data; 162 . struct pe_tdata *pe_obj_data; 163 . struct xcoff_tdata *xcoff_obj_data; 164 . struct ecoff_tdata *ecoff_obj_data; 165 . struct ieee_data_struct *ieee_data; 166 . struct ieee_ar_data_struct *ieee_ar_data; 167 . struct srec_data_struct *srec_data; 168 . struct ihex_data_struct *ihex_data; 169 . struct tekhex_data_struct *tekhex_data; 170 . struct elf_obj_tdata *elf_obj_data; 171 . struct nlm_obj_tdata *nlm_obj_data; 172 . struct bout_data_struct *bout_data; 173 . struct mmo_data_struct *mmo_data; 174 . struct sun_core_struct *sun_core_data; 175 . struct sco5_core_struct *sco5_core_data; 176 . struct trad_core_struct *trad_core_data; 177 . struct som_data_struct *som_data; 178 . struct hpux_core_struct *hpux_core_data; 179 . struct hppabsd_core_struct *hppabsd_core_data; 180 . struct sgi_core_struct *sgi_core_data; 181 . struct lynx_core_struct *lynx_core_data; 182 . struct osf_core_struct *osf_core_data; 183 . struct cisco_core_struct *cisco_core_data; 184 . struct versados_data_struct *versados_data; 185 . struct netbsd_core_struct *netbsd_core_data; 186 . struct mach_o_data_struct *mach_o_data; 187 . struct mach_o_fat_data_struct *mach_o_fat_data; 188 . struct bfd_pef_data_struct *pef_data; 189 . struct bfd_pef_xlib_data_struct *pef_xlib_data; 190 . struct bfd_sym_data_struct *sym_data; 191 . void *any; 192 . } 193 . tdata; 194 . 195 . {* Used by the application to hold private data. *} 196 . void *usrdata; 197 . 198 . {* Where all the allocated stuff under this BFD goes. This is a 199 . struct objalloc *, but we use void * to avoid requiring the inclusion 200 . of objalloc.h. *} 201 . void *memory; 202 .}; 203 . 204 */ 205 206 #include "bfd.h" 207 #include "bfdver.h" 208 #include "sysdep.h" 209 #include <stdarg.h> 210 #include "libiberty.h" 211 #include "safe-ctype.h" 212 #include "bfdlink.h" 213 #include "libbfd.h" 214 #include "coff/internal.h" 215 #include "coff/sym.h" 216 #include "libcoff.h" 217 #include "libecoff.h" 218 #undef obj_symbols 219 #include "elf-bfd.h" 220 221 /* provide storage for subsystem, stack and heap data which may have been 222 passed in on the command line. Ld puts this data into a bfd_link_info 223 struct which ultimately gets passed in to the bfd. When it arrives, copy 224 it to the following struct so that the data will be available in coffcode.h 225 where it is needed. The typedef's used are defined in bfd.h */ 226 227 /* 228 SECTION 229 Error reporting 230 231 Most BFD functions return nonzero on success (check their 232 individual documentation for precise semantics). On an error, 233 they call <<bfd_set_error>> to set an error condition that callers 234 can check by calling <<bfd_get_error>>. 235 If that returns <<bfd_error_system_call>>, then check 236 <<errno>>. 237 238 The easiest way to report a BFD error to the user is to 239 use <<bfd_perror>>. 240 241 SUBSECTION 242 Type <<bfd_error_type>> 243 244 The values returned by <<bfd_get_error>> are defined by the 245 enumerated type <<bfd_error_type>>. 246 247 CODE_FRAGMENT 248 . 249 .typedef enum bfd_error 250 .{ 251 . bfd_error_no_error = 0, 252 . bfd_error_system_call, 253 . bfd_error_invalid_target, 254 . bfd_error_wrong_format, 255 . bfd_error_wrong_object_format, 256 . bfd_error_invalid_operation, 257 . bfd_error_no_memory, 258 . bfd_error_no_symbols, 259 . bfd_error_no_armap, 260 . bfd_error_no_more_archived_files, 261 . bfd_error_malformed_archive, 262 . bfd_error_file_not_recognized, 263 . bfd_error_file_ambiguously_recognized, 264 . bfd_error_no_contents, 265 . bfd_error_nonrepresentable_section, 266 . bfd_error_no_debug_section, 267 . bfd_error_bad_value, 268 . bfd_error_file_truncated, 269 . bfd_error_file_too_big, 270 . bfd_error_invalid_error_code 271 .} 272 .bfd_error_type; 273 . 274 */ 275 276 static bfd_error_type bfd_error = bfd_error_no_error; 277 278 const char *const bfd_errmsgs[] = 279 { 280 N_("No error"), 281 N_("System call error"), 282 N_("Invalid bfd target"), 283 N_("File in wrong format"), 284 N_("Archive object file in wrong format"), 285 N_("Invalid operation"), 286 N_("Memory exhausted"), 287 N_("No symbols"), 288 N_("Archive has no index; run ranlib to add one"), 289 N_("No more archived files"), 290 N_("Malformed archive"), 291 N_("File format not recognized"), 292 N_("File format is ambiguous"), 293 N_("Section has no contents"), 294 N_("Nonrepresentable section on output"), 295 N_("Symbol needs debug section which does not exist"), 296 N_("Bad value"), 297 N_("File truncated"), 298 N_("File too big"), 299 N_("#<Invalid error code>") 300 }; 301 302 /* 303 FUNCTION 304 bfd_get_error 305 306 SYNOPSIS 307 bfd_error_type bfd_get_error (void); 308 309 DESCRIPTION 310 Return the current BFD error condition. 311 */ 312 313 bfd_error_type 314 bfd_get_error (void) 315 { 316 return bfd_error; 317 } 318 319 /* 320 FUNCTION 321 bfd_set_error 322 323 SYNOPSIS 324 void bfd_set_error (bfd_error_type error_tag); 325 326 DESCRIPTION 327 Set the BFD error condition to be @var{error_tag}. 328 */ 329 330 void 331 bfd_set_error (bfd_error_type error_tag) 332 { 333 bfd_error = error_tag; 334 } 335 336 /* 337 FUNCTION 338 bfd_errmsg 339 340 SYNOPSIS 341 const char *bfd_errmsg (bfd_error_type error_tag); 342 343 DESCRIPTION 344 Return a string describing the error @var{error_tag}, or 345 the system error if @var{error_tag} is <<bfd_error_system_call>>. 346 */ 347 348 const char * 349 bfd_errmsg (bfd_error_type error_tag) 350 { 351 #ifndef errno 352 extern int errno; 353 #endif 354 if (error_tag == bfd_error_system_call) 355 return xstrerror (errno); 356 357 if (error_tag > bfd_error_invalid_error_code) 358 error_tag = bfd_error_invalid_error_code; /* sanity check */ 359 360 return _(bfd_errmsgs [error_tag]); 361 } 362 363 /* 364 FUNCTION 365 bfd_perror 366 367 SYNOPSIS 368 void bfd_perror (const char *message); 369 370 DESCRIPTION 371 Print to the standard error stream a string describing the 372 last BFD error that occurred, or the last system error if 373 the last BFD error was a system call failure. If @var{message} 374 is non-NULL and non-empty, the error string printed is preceded 375 by @var{message}, a colon, and a space. It is followed by a newline. 376 */ 377 378 void 379 bfd_perror (const char *message) 380 { 381 if (bfd_get_error () == bfd_error_system_call) 382 /* Must be a system error then. */ 383 perror ((char *) message); 384 else 385 { 386 if (message == NULL || *message == '\0') 387 fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ())); 388 else 389 fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ())); 390 } 391 } 392 393 /* 394 SUBSECTION 395 BFD error handler 396 397 Some BFD functions want to print messages describing the 398 problem. They call a BFD error handler function. This 399 function may be overridden by the program. 400 401 The BFD error handler acts like printf. 402 403 CODE_FRAGMENT 404 . 405 .typedef void (*bfd_error_handler_type) (const char *, ...); 406 . 407 */ 408 409 /* The program name used when printing BFD error messages. */ 410 411 static const char *_bfd_error_program_name; 412 413 /* This is the default routine to handle BFD error messages. */ 414 415 static void 416 _bfd_default_error_handler (const char *s, ...) 417 { 418 va_list p; 419 420 if (_bfd_error_program_name != NULL) 421 fprintf (stderr, "%s: ", _bfd_error_program_name); 422 else 423 fprintf (stderr, "BFD: "); 424 425 va_start (p, s); 426 vfprintf (stderr, s, p); 427 va_end (p); 428 429 fprintf (stderr, "\n"); 430 } 431 432 /* This is a function pointer to the routine which should handle BFD 433 error messages. It is called when a BFD routine encounters an 434 error for which it wants to print a message. Going through a 435 function pointer permits a program linked against BFD to intercept 436 the messages and deal with them itself. */ 437 438 bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler; 439 440 /* 441 FUNCTION 442 bfd_set_error_handler 443 444 SYNOPSIS 445 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type); 446 447 DESCRIPTION 448 Set the BFD error handler function. Returns the previous 449 function. 450 */ 451 452 bfd_error_handler_type 453 bfd_set_error_handler (bfd_error_handler_type pnew) 454 { 455 bfd_error_handler_type pold; 456 457 pold = _bfd_error_handler; 458 _bfd_error_handler = pnew; 459 return pold; 460 } 461 462 /* 463 FUNCTION 464 bfd_set_error_program_name 465 466 SYNOPSIS 467 void bfd_set_error_program_name (const char *); 468 469 DESCRIPTION 470 Set the program name to use when printing a BFD error. This 471 is printed before the error message followed by a colon and 472 space. The string must not be changed after it is passed to 473 this function. 474 */ 475 476 void 477 bfd_set_error_program_name (const char *name) 478 { 479 _bfd_error_program_name = name; 480 } 481 482 /* 483 FUNCTION 484 bfd_get_error_handler 485 486 SYNOPSIS 487 bfd_error_handler_type bfd_get_error_handler (void); 488 489 DESCRIPTION 490 Return the BFD error handler function. 491 */ 492 493 bfd_error_handler_type 494 bfd_get_error_handler (void) 495 { 496 return _bfd_error_handler; 497 } 498 499 /* 500 FUNCTION 501 bfd_archive_filename 502 503 SYNOPSIS 504 const char *bfd_archive_filename (bfd *); 505 506 DESCRIPTION 507 For a BFD that is a component of an archive, returns a string 508 with both the archive name and file name. For other BFDs, just 509 returns the file name. 510 */ 511 512 const char * 513 bfd_archive_filename (bfd *abfd) 514 { 515 if (abfd == NULL) 516 return _("<unknown>"); 517 518 if (abfd->my_archive) 519 { 520 static size_t curr = 0; 521 static char *buf; 522 size_t needed; 523 524 needed = (strlen (bfd_get_filename (abfd->my_archive)) 525 + strlen (bfd_get_filename (abfd)) + 3); 526 if (needed > curr) 527 { 528 if (curr) 529 free (buf); 530 curr = needed + (needed >> 1); 531 buf = bfd_malloc (curr); 532 /* If we can't malloc, fail safe by returning just the file 533 name. This function is only used when building error 534 messages. */ 535 if (!buf) 536 { 537 curr = 0; 538 return bfd_get_filename (abfd); 539 } 540 } 541 sprintf (buf, "%s(%s)", bfd_get_filename (abfd->my_archive), 542 bfd_get_filename (abfd)); 543 return buf; 544 } 545 else 546 return bfd_get_filename (abfd); 547 } 548 549 /* 550 SECTION 551 Symbols 552 */ 553 554 /* 555 FUNCTION 556 bfd_get_reloc_upper_bound 557 558 SYNOPSIS 559 long bfd_get_reloc_upper_bound (bfd *abfd, asection *sect); 560 561 DESCRIPTION 562 Return the number of bytes required to store the 563 relocation information associated with section @var{sect} 564 attached to bfd @var{abfd}. If an error occurs, return -1. 565 566 */ 567 568 long 569 bfd_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) 570 { 571 if (abfd->format != bfd_object) 572 { 573 bfd_set_error (bfd_error_invalid_operation); 574 return -1; 575 } 576 577 return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect)); 578 } 579 580 /* 581 FUNCTION 582 bfd_canonicalize_reloc 583 584 SYNOPSIS 585 long bfd_canonicalize_reloc 586 (bfd *abfd, asection *sec, arelent **loc, asymbol **syms); 587 588 DESCRIPTION 589 Call the back end associated with the open BFD 590 @var{abfd} and translate the external form of the relocation 591 information attached to @var{sec} into the internal canonical 592 form. Place the table into memory at @var{loc}, which has 593 been preallocated, usually by a call to 594 <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or 595 -1 on error. 596 597 The @var{syms} table is also needed for horrible internal magic 598 reasons. 599 600 */ 601 long 602 bfd_canonicalize_reloc (bfd *abfd, 603 sec_ptr asect, 604 arelent **location, 605 asymbol **symbols) 606 { 607 if (abfd->format != bfd_object) 608 { 609 bfd_set_error (bfd_error_invalid_operation); 610 return -1; 611 } 612 613 return BFD_SEND (abfd, _bfd_canonicalize_reloc, 614 (abfd, asect, location, symbols)); 615 } 616 617 /* 618 FUNCTION 619 bfd_set_reloc 620 621 SYNOPSIS 622 void bfd_set_reloc 623 (bfd *abfd, asection *sec, arelent **rel, unsigned int count); 624 625 DESCRIPTION 626 Set the relocation pointer and count within 627 section @var{sec} to the values @var{rel} and @var{count}. 628 The argument @var{abfd} is ignored. 629 630 */ 631 632 void 633 bfd_set_reloc (bfd *ignore_abfd ATTRIBUTE_UNUSED, 634 sec_ptr asect, 635 arelent **location, 636 unsigned int count) 637 { 638 asect->orelocation = location; 639 asect->reloc_count = count; 640 } 641 642 /* 643 FUNCTION 644 bfd_set_file_flags 645 646 SYNOPSIS 647 bfd_boolean bfd_set_file_flags (bfd *abfd, flagword flags); 648 649 DESCRIPTION 650 Set the flag word in the BFD @var{abfd} to the value @var{flags}. 651 652 Possible errors are: 653 o <<bfd_error_wrong_format>> - The target bfd was not of object format. 654 o <<bfd_error_invalid_operation>> - The target bfd was open for reading. 655 o <<bfd_error_invalid_operation>> - 656 The flag word contained a bit which was not applicable to the 657 type of file. E.g., an attempt was made to set the <<D_PAGED>> bit 658 on a BFD format which does not support demand paging. 659 660 */ 661 662 bfd_boolean 663 bfd_set_file_flags (bfd *abfd, flagword flags) 664 { 665 if (abfd->format != bfd_object) 666 { 667 bfd_set_error (bfd_error_wrong_format); 668 return FALSE; 669 } 670 671 if (bfd_read_p (abfd)) 672 { 673 bfd_set_error (bfd_error_invalid_operation); 674 return FALSE; 675 } 676 677 bfd_get_file_flags (abfd) = flags; 678 if ((flags & bfd_applicable_file_flags (abfd)) != flags) 679 { 680 bfd_set_error (bfd_error_invalid_operation); 681 return FALSE; 682 } 683 684 return TRUE; 685 } 686 687 void 688 bfd_assert (const char *file, int line) 689 { 690 (*_bfd_error_handler) (_("BFD %s assertion fail %s:%d"), 691 BFD_VERSION_STRING, file, line); 692 } 693 694 /* A more or less friendly abort message. In libbfd.h abort is 695 defined to call this function. */ 696 697 #ifndef EXIT_FAILURE 698 #define EXIT_FAILURE 1 699 #endif 700 701 void 702 _bfd_abort (const char *file, int line, const char *fn) 703 { 704 if (fn != NULL) 705 (*_bfd_error_handler) 706 (_("BFD %s internal error, aborting at %s line %d in %s\n"), 707 BFD_VERSION_STRING, file, line, fn); 708 else 709 (*_bfd_error_handler) 710 (_("BFD %s internal error, aborting at %s line %d\n"), 711 BFD_VERSION_STRING, file, line); 712 (*_bfd_error_handler) (_("Please report this bug.\n")); 713 xexit (EXIT_FAILURE); 714 } 715 716 /* 717 FUNCTION 718 bfd_get_arch_size 719 720 SYNOPSIS 721 int bfd_get_arch_size (bfd *abfd); 722 723 DESCRIPTION 724 Returns the architecture address size, in bits, as determined 725 by the object file's format. For ELF, this information is 726 included in the header. 727 728 RETURNS 729 Returns the arch size in bits if known, <<-1>> otherwise. 730 */ 731 732 int 733 bfd_get_arch_size (bfd *abfd) 734 { 735 if (abfd->xvec->flavour == bfd_target_elf_flavour) 736 return get_elf_backend_data (abfd)->s->arch_size; 737 738 return -1; 739 } 740 741 /* 742 FUNCTION 743 bfd_get_sign_extend_vma 744 745 SYNOPSIS 746 int bfd_get_sign_extend_vma (bfd *abfd); 747 748 DESCRIPTION 749 Indicates if the target architecture "naturally" sign extends 750 an address. Some architectures implicitly sign extend address 751 values when they are converted to types larger than the size 752 of an address. For instance, bfd_get_start_address() will 753 return an address sign extended to fill a bfd_vma when this is 754 the case. 755 756 RETURNS 757 Returns <<1>> if the target architecture is known to sign 758 extend addresses, <<0>> if the target architecture is known to 759 not sign extend addresses, and <<-1>> otherwise. 760 */ 761 762 int 763 bfd_get_sign_extend_vma (bfd *abfd) 764 { 765 char *name; 766 767 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) 768 return get_elf_backend_data (abfd)->sign_extend_vma; 769 770 name = bfd_get_target (abfd); 771 772 /* Return a proper value for DJGPP COFF (an x86 COFF variant). 773 This function is required for DWARF2 support, but there is 774 no place to store this information in the COFF back end. 775 Should enough other COFF targets add support for DWARF2, 776 a place will have to be found. Until then, this hack will do. */ 777 if (strncmp (name, "coff-go32", sizeof ("coff-go32") - 1) == 0) 778 return 1; 779 780 bfd_set_error (bfd_error_wrong_format); 781 return -1; 782 } 783 784 /* 785 FUNCTION 786 bfd_set_start_address 787 788 SYNOPSIS 789 bfd_boolean bfd_set_start_address (bfd *abfd, bfd_vma vma); 790 791 DESCRIPTION 792 Make @var{vma} the entry point of output BFD @var{abfd}. 793 794 RETURNS 795 Returns <<TRUE>> on success, <<FALSE>> otherwise. 796 */ 797 798 bfd_boolean 799 bfd_set_start_address (bfd *abfd, bfd_vma vma) 800 { 801 abfd->start_address = vma; 802 return TRUE; 803 } 804 805 /* 806 FUNCTION 807 bfd_get_gp_size 808 809 SYNOPSIS 810 unsigned int bfd_get_gp_size (bfd *abfd); 811 812 DESCRIPTION 813 Return the maximum size of objects to be optimized using the GP 814 register under MIPS ECOFF. This is typically set by the <<-G>> 815 argument to the compiler, assembler or linker. 816 */ 817 818 unsigned int 819 bfd_get_gp_size (bfd *abfd) 820 { 821 if (abfd->format == bfd_object) 822 { 823 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 824 return ecoff_data (abfd)->gp_size; 825 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 826 return elf_gp_size (abfd); 827 } 828 return 0; 829 } 830 831 /* 832 FUNCTION 833 bfd_set_gp_size 834 835 SYNOPSIS 836 void bfd_set_gp_size (bfd *abfd, unsigned int i); 837 838 DESCRIPTION 839 Set the maximum size of objects to be optimized using the GP 840 register under ECOFF or MIPS ELF. This is typically set by 841 the <<-G>> argument to the compiler, assembler or linker. 842 */ 843 844 void 845 bfd_set_gp_size (bfd *abfd, unsigned int i) 846 { 847 /* Don't try to set GP size on an archive or core file! */ 848 if (abfd->format != bfd_object) 849 return; 850 851 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 852 ecoff_data (abfd)->gp_size = i; 853 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 854 elf_gp_size (abfd) = i; 855 } 856 857 /* Get the GP value. This is an internal function used by some of the 858 relocation special_function routines on targets which support a GP 859 register. */ 860 861 bfd_vma 862 _bfd_get_gp_value (bfd *abfd) 863 { 864 if (! abfd) 865 return 0; 866 if (abfd->format != bfd_object) 867 return 0; 868 869 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 870 return ecoff_data (abfd)->gp; 871 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 872 return elf_gp (abfd); 873 874 return 0; 875 } 876 877 /* Set the GP value. */ 878 879 void 880 _bfd_set_gp_value (bfd *abfd, bfd_vma v) 881 { 882 if (! abfd) 883 BFD_FAIL (); 884 if (abfd->format != bfd_object) 885 return; 886 887 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 888 ecoff_data (abfd)->gp = v; 889 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 890 elf_gp (abfd) = v; 891 } 892 893 /* 894 FUNCTION 895 bfd_scan_vma 896 897 SYNOPSIS 898 bfd_vma bfd_scan_vma (const char *string, const char **end, int base); 899 900 DESCRIPTION 901 Convert, like <<strtoul>>, a numerical expression 902 @var{string} into a <<bfd_vma>> integer, and return that integer. 903 (Though without as many bells and whistles as <<strtoul>>.) 904 The expression is assumed to be unsigned (i.e., positive). 905 If given a @var{base}, it is used as the base for conversion. 906 A base of 0 causes the function to interpret the string 907 in hex if a leading "0x" or "0X" is found, otherwise 908 in octal if a leading zero is found, otherwise in decimal. 909 910 If the value would overflow, the maximum <<bfd_vma>> value is 911 returned. 912 */ 913 914 bfd_vma 915 bfd_scan_vma (const char *string, const char **end, int base) 916 { 917 bfd_vma value; 918 bfd_vma cutoff; 919 unsigned int cutlim; 920 int overflow; 921 922 /* Let the host do it if possible. */ 923 if (sizeof (bfd_vma) <= sizeof (unsigned long)) 924 return strtoul (string, (char **) end, base); 925 926 #ifdef HAVE_STRTOULL 927 if (sizeof (bfd_vma) <= sizeof (unsigned long long)) 928 return strtoull (string, (char **) end, base); 929 #endif 930 931 if (base == 0) 932 { 933 if (string[0] == '0') 934 { 935 if ((string[1] == 'x') || (string[1] == 'X')) 936 base = 16; 937 else 938 base = 8; 939 } 940 } 941 942 if ((base < 2) || (base > 36)) 943 base = 10; 944 945 if (base == 16 946 && string[0] == '0' 947 && (string[1] == 'x' || string[1] == 'X') 948 && ISXDIGIT (string[2])) 949 { 950 string += 2; 951 } 952 953 cutoff = (~ (bfd_vma) 0) / (bfd_vma) base; 954 cutlim = (~ (bfd_vma) 0) % (bfd_vma) base; 955 value = 0; 956 overflow = 0; 957 while (1) 958 { 959 unsigned int digit; 960 961 digit = *string; 962 if (ISDIGIT (digit)) 963 digit = digit - '0'; 964 else if (ISALPHA (digit)) 965 digit = TOUPPER (digit) - 'A' + 10; 966 else 967 break; 968 if (digit >= (unsigned int) base) 969 break; 970 if (value > cutoff || (value == cutoff && digit > cutlim)) 971 overflow = 1; 972 value = value * base + digit; 973 ++string; 974 } 975 976 if (overflow) 977 value = ~ (bfd_vma) 0; 978 979 if (end != NULL) 980 *end = string; 981 982 return value; 983 } 984 985 /* 986 FUNCTION 987 bfd_copy_private_bfd_data 988 989 SYNOPSIS 990 bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd); 991 992 DESCRIPTION 993 Copy private BFD information from the BFD @var{ibfd} to the 994 the BFD @var{obfd}. Return <<TRUE>> on success, <<FALSE>> on error. 995 Possible error returns are: 996 997 o <<bfd_error_no_memory>> - 998 Not enough memory exists to create private data for @var{obfd}. 999 1000 .#define bfd_copy_private_bfd_data(ibfd, obfd) \ 1001 . BFD_SEND (obfd, _bfd_copy_private_bfd_data, \ 1002 . (ibfd, obfd)) 1003 1004 */ 1005 1006 /* 1007 FUNCTION 1008 bfd_merge_private_bfd_data 1009 1010 SYNOPSIS 1011 bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd); 1012 1013 DESCRIPTION 1014 Merge private BFD information from the BFD @var{ibfd} to the 1015 the output file BFD @var{obfd} when linking. Return <<TRUE>> 1016 on success, <<FALSE>> on error. Possible error returns are: 1017 1018 o <<bfd_error_no_memory>> - 1019 Not enough memory exists to create private data for @var{obfd}. 1020 1021 .#define bfd_merge_private_bfd_data(ibfd, obfd) \ 1022 . BFD_SEND (obfd, _bfd_merge_private_bfd_data, \ 1023 . (ibfd, obfd)) 1024 1025 */ 1026 1027 /* 1028 FUNCTION 1029 bfd_set_private_flags 1030 1031 SYNOPSIS 1032 bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags); 1033 1034 DESCRIPTION 1035 Set private BFD flag information in the BFD @var{abfd}. 1036 Return <<TRUE>> on success, <<FALSE>> on error. Possible error 1037 returns are: 1038 1039 o <<bfd_error_no_memory>> - 1040 Not enough memory exists to create private data for @var{obfd}. 1041 1042 .#define bfd_set_private_flags(abfd, flags) \ 1043 . BFD_SEND (abfd, _bfd_set_private_flags, (abfd, flags)) 1044 1045 */ 1046 1047 /* 1048 FUNCTION 1049 Other functions 1050 1051 DESCRIPTION 1052 The following functions exist but have not yet been documented. 1053 1054 .#define bfd_sizeof_headers(abfd, reloc) \ 1055 . BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc)) 1056 . 1057 .#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \ 1058 . BFD_SEND (abfd, _bfd_find_nearest_line, \ 1059 . (abfd, sec, syms, off, file, func, line)) 1060 . 1061 .#define bfd_debug_info_start(abfd) \ 1062 . BFD_SEND (abfd, _bfd_debug_info_start, (abfd)) 1063 . 1064 .#define bfd_debug_info_end(abfd) \ 1065 . BFD_SEND (abfd, _bfd_debug_info_end, (abfd)) 1066 . 1067 .#define bfd_debug_info_accumulate(abfd, section) \ 1068 . BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section)) 1069 . 1070 .#define bfd_stat_arch_elt(abfd, stat) \ 1071 . BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat)) 1072 . 1073 .#define bfd_update_armap_timestamp(abfd) \ 1074 . BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd)) 1075 . 1076 .#define bfd_set_arch_mach(abfd, arch, mach)\ 1077 . BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach)) 1078 . 1079 .#define bfd_relax_section(abfd, section, link_info, again) \ 1080 . BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again)) 1081 . 1082 .#define bfd_gc_sections(abfd, link_info) \ 1083 . BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info)) 1084 . 1085 .#define bfd_merge_sections(abfd, link_info) \ 1086 . BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info)) 1087 . 1088 .#define bfd_discard_group(abfd, sec) \ 1089 . BFD_SEND (abfd, _bfd_discard_group, (abfd, sec)) 1090 . 1091 .#define bfd_link_hash_table_create(abfd) \ 1092 . BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd)) 1093 . 1094 .#define bfd_link_hash_table_free(abfd, hash) \ 1095 . BFD_SEND (abfd, _bfd_link_hash_table_free, (hash)) 1096 . 1097 .#define bfd_link_add_symbols(abfd, info) \ 1098 . BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info)) 1099 . 1100 .#define bfd_link_just_syms(sec, info) \ 1101 . BFD_SEND (abfd, _bfd_link_just_syms, (sec, info)) 1102 . 1103 .#define bfd_final_link(abfd, info) \ 1104 . BFD_SEND (abfd, _bfd_final_link, (abfd, info)) 1105 . 1106 .#define bfd_free_cached_info(abfd) \ 1107 . BFD_SEND (abfd, _bfd_free_cached_info, (abfd)) 1108 . 1109 .#define bfd_get_dynamic_symtab_upper_bound(abfd) \ 1110 . BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd)) 1111 . 1112 .#define bfd_print_private_bfd_data(abfd, file)\ 1113 . BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file)) 1114 . 1115 .#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \ 1116 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols)) 1117 . 1118 .#define bfd_get_dynamic_reloc_upper_bound(abfd) \ 1119 . BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd)) 1120 . 1121 .#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \ 1122 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms)) 1123 . 1124 .extern bfd_byte *bfd_get_relocated_section_contents 1125 . (bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *, 1126 . bfd_boolean, asymbol **); 1127 . 1128 1129 */ 1130 1131 bfd_byte * 1132 bfd_get_relocated_section_contents (bfd *abfd, 1133 struct bfd_link_info *link_info, 1134 struct bfd_link_order *link_order, 1135 bfd_byte *data, 1136 bfd_boolean relocatable, 1137 asymbol **symbols) 1138 { 1139 bfd *abfd2; 1140 bfd_byte *(*fn) (bfd *, struct bfd_link_info *, struct bfd_link_order *, 1141 bfd_byte *, bfd_boolean, asymbol **); 1142 1143 if (link_order->type == bfd_indirect_link_order) 1144 { 1145 abfd2 = link_order->u.indirect.section->owner; 1146 if (abfd2 == NULL) 1147 abfd2 = abfd; 1148 } 1149 else 1150 abfd2 = abfd; 1151 1152 fn = abfd2->xvec->_bfd_get_relocated_section_contents; 1153 1154 return (*fn) (abfd, link_info, link_order, data, relocatable, symbols); 1155 } 1156 1157 /* Record information about an ELF program header. */ 1158 1159 bfd_boolean 1160 bfd_record_phdr (bfd *abfd, 1161 unsigned long type, 1162 bfd_boolean flags_valid, 1163 flagword flags, 1164 bfd_boolean at_valid, 1165 bfd_vma at, 1166 bfd_boolean includes_filehdr, 1167 bfd_boolean includes_phdrs, 1168 unsigned int count, 1169 asection **secs) 1170 { 1171 struct elf_segment_map *m, **pm; 1172 bfd_size_type amt; 1173 1174 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) 1175 return TRUE; 1176 1177 amt = sizeof (struct elf_segment_map); 1178 amt += ((bfd_size_type) count - 1) * sizeof (asection *); 1179 m = bfd_alloc (abfd, amt); 1180 if (m == NULL) 1181 return FALSE; 1182 1183 m->next = NULL; 1184 m->p_type = type; 1185 m->p_flags = flags; 1186 m->p_paddr = at; 1187 m->p_flags_valid = flags_valid; 1188 m->p_paddr_valid = at_valid; 1189 m->includes_filehdr = includes_filehdr; 1190 m->includes_phdrs = includes_phdrs; 1191 m->count = count; 1192 if (count > 0) 1193 memcpy (m->sections, secs, count * sizeof (asection *)); 1194 1195 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) 1196 ; 1197 *pm = m; 1198 1199 return TRUE; 1200 } 1201 1202 void 1203 bfd_sprintf_vma (bfd *abfd, char *buf, bfd_vma value) 1204 { 1205 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) 1206 get_elf_backend_data (abfd)->elf_backend_sprintf_vma (abfd, buf, value); 1207 else 1208 sprintf_vma (buf, value); 1209 } 1210 1211 void 1212 bfd_fprintf_vma (bfd *abfd, void *stream, bfd_vma value) 1213 { 1214 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) 1215 get_elf_backend_data (abfd)->elf_backend_fprintf_vma (abfd, stream, value); 1216 else 1217 fprintf_vma ((FILE *) stream, value); 1218 } 1219 1220 /* 1221 FUNCTION 1222 bfd_alt_mach_code 1223 1224 SYNOPSIS 1225 bfd_boolean bfd_alt_mach_code (bfd *abfd, int alternative); 1226 1227 DESCRIPTION 1228 1229 When more than one machine code number is available for the 1230 same machine type, this function can be used to switch between 1231 the preferred one (alternative == 0) and any others. Currently, 1232 only ELF supports this feature, with up to two alternate 1233 machine codes. 1234 */ 1235 1236 bfd_boolean 1237 bfd_alt_mach_code (bfd *abfd, int alternative) 1238 { 1239 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) 1240 { 1241 int code; 1242 1243 switch (alternative) 1244 { 1245 case 0: 1246 code = get_elf_backend_data (abfd)->elf_machine_code; 1247 break; 1248 1249 case 1: 1250 code = get_elf_backend_data (abfd)->elf_machine_alt1; 1251 if (code == 0) 1252 return FALSE; 1253 break; 1254 1255 case 2: 1256 code = get_elf_backend_data (abfd)->elf_machine_alt2; 1257 if (code == 0) 1258 return FALSE; 1259 break; 1260 1261 default: 1262 return FALSE; 1263 } 1264 1265 elf_elfheader (abfd)->e_machine = code; 1266 1267 return TRUE; 1268 } 1269 1270 return FALSE; 1271 } 1272 1273 /* 1274 CODE_FRAGMENT 1275 1276 .struct bfd_preserve 1277 .{ 1278 . void *marker; 1279 . void *tdata; 1280 . flagword flags; 1281 . const struct bfd_arch_info *arch_info; 1282 . struct bfd_section *sections; 1283 . struct bfd_section **section_tail; 1284 . unsigned int section_count; 1285 . struct bfd_hash_table section_htab; 1286 .}; 1287 . 1288 */ 1289 1290 /* 1291 FUNCTION 1292 bfd_preserve_save 1293 1294 SYNOPSIS 1295 bfd_boolean bfd_preserve_save (bfd *, struct bfd_preserve *); 1296 1297 DESCRIPTION 1298 When testing an object for compatibility with a particular 1299 target back-end, the back-end object_p function needs to set 1300 up certain fields in the bfd on successfully recognizing the 1301 object. This typically happens in a piecemeal fashion, with 1302 failures possible at many points. On failure, the bfd is 1303 supposed to be restored to its initial state, which is 1304 virtually impossible. However, restoring a subset of the bfd 1305 state works in practice. This function stores the subset and 1306 reinitializes the bfd. 1307 1308 */ 1309 1310 bfd_boolean 1311 bfd_preserve_save (bfd *abfd, struct bfd_preserve *preserve) 1312 { 1313 preserve->tdata = abfd->tdata.any; 1314 preserve->arch_info = abfd->arch_info; 1315 preserve->flags = abfd->flags; 1316 preserve->sections = abfd->sections; 1317 preserve->section_tail = abfd->section_tail; 1318 preserve->section_count = abfd->section_count; 1319 preserve->section_htab = abfd->section_htab; 1320 1321 if (! bfd_hash_table_init (&abfd->section_htab, bfd_section_hash_newfunc)) 1322 return FALSE; 1323 1324 abfd->tdata.any = NULL; 1325 abfd->arch_info = &bfd_default_arch_struct; 1326 abfd->flags &= BFD_IN_MEMORY; 1327 abfd->sections = NULL; 1328 abfd->section_tail = &abfd->sections; 1329 abfd->section_count = 0; 1330 1331 return TRUE; 1332 } 1333 1334 /* 1335 FUNCTION 1336 bfd_preserve_restore 1337 1338 SYNOPSIS 1339 void bfd_preserve_restore (bfd *, struct bfd_preserve *); 1340 1341 DESCRIPTION 1342 This function restores bfd state saved by bfd_preserve_save. 1343 If MARKER is non-NULL in struct bfd_preserve then that block 1344 and all subsequently bfd_alloc'd memory is freed. 1345 1346 */ 1347 1348 void 1349 bfd_preserve_restore (bfd *abfd, struct bfd_preserve *preserve) 1350 { 1351 bfd_hash_table_free (&abfd->section_htab); 1352 1353 abfd->tdata.any = preserve->tdata; 1354 abfd->arch_info = preserve->arch_info; 1355 abfd->flags = preserve->flags; 1356 abfd->section_htab = preserve->section_htab; 1357 abfd->sections = preserve->sections; 1358 abfd->section_tail = preserve->section_tail; 1359 abfd->section_count = preserve->section_count; 1360 1361 /* bfd_release frees all memory more recently bfd_alloc'd than 1362 its arg, as well as its arg. */ 1363 if (preserve->marker != NULL) 1364 { 1365 bfd_release (abfd, preserve->marker); 1366 preserve->marker = NULL; 1367 } 1368 } 1369 1370 /* 1371 FUNCTION 1372 bfd_preserve_finish 1373 1374 SYNOPSIS 1375 void bfd_preserve_finish (bfd *, struct bfd_preserve *); 1376 1377 DESCRIPTION 1378 This function should be called when the bfd state saved by 1379 bfd_preserve_save is no longer needed. ie. when the back-end 1380 object_p function returns with success. 1381 1382 */ 1383 1384 void 1385 bfd_preserve_finish (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_preserve *preserve) 1386 { 1387 /* It would be nice to be able to free more memory here, eg. old 1388 tdata, but that's not possible since these blocks are sitting 1389 inside bfd_alloc'd memory. The section hash is on a separate 1390 objalloc. */ 1391 bfd_hash_table_free (&preserve->section_htab); 1392 } 1393