bfd.c revision 60484
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 6This file is part of BFD, the Binary File Descriptor library. 7 8This program is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 2 of the License, or 11(at your option) any later version. 12 13This program is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with this program; if not, write to the Free Software 20Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 21 22/* 23SECTION 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 34CODE_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> 215 216/* 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 */ 221 222 223 224/* 225SECTION 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 238SUBSECTION 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 244CODE_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 271static bfd_error_type bfd_error = bfd_error_no_error; 272 273CONST 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/* 296FUNCTION 297 bfd_get_error 298 299SYNOPSIS 300 bfd_error_type bfd_get_error (void); 301 302DESCRIPTION 303 Return the current BFD error condition. 304*/ 305 306bfd_error_type 307bfd_get_error () 308{ 309 return bfd_error; 310} 311 312/* 313FUNCTION 314 bfd_set_error 315 316SYNOPSIS 317 void bfd_set_error (bfd_error_type error_tag); 318 319DESCRIPTION 320 Set the BFD error condition to be @var{error_tag}. 321*/ 322 323void 324bfd_set_error (error_tag) 325 bfd_error_type error_tag; 326{ 327 bfd_error = error_tag; 328} 329 330/* 331FUNCTION 332 bfd_errmsg 333 334SYNOPSIS 335 CONST char *bfd_errmsg (bfd_error_type error_tag); 336 337DESCRIPTION 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 342CONST char * 343bfd_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/* 360FUNCTION 361 bfd_perror 362 363SYNOPSIS 364 void bfd_perror (CONST char *message); 365 366DESCRIPTION 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 374void 375bfd_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/* 389SUBSECTION 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 398CODE_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 406static const char *_bfd_error_program_name; 407 408/* This is the default routine to handle BFD error messages. */ 409 410#ifdef ANSI_PROTOTYPES 411 412static void _bfd_default_error_handler PARAMS ((const char *s, ...)); 413 414static 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 435static void _bfd_default_error_handler (); 436 437static 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 467bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler; 468 469/* 470FUNCTION 471 bfd_set_error_handler 472 473SYNOPSIS 474 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type); 475 476DESCRIPTION 477 Set the BFD error handler function. Returns the previous 478 function. 479*/ 480 481bfd_error_handler_type 482bfd_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/* 493FUNCTION 494 bfd_set_error_program_name 495 496SYNOPSIS 497 void bfd_set_error_program_name (const char *); 498 499DESCRIPTION 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 506void 507bfd_set_error_program_name (name) 508 const char *name; 509{ 510 _bfd_error_program_name = name; 511} 512 513 514/* 515FUNCTION 516 bfd_get_error_handler 517 518SYNOPSIS 519 bfd_error_handler_type bfd_get_error_handler (void); 520 521DESCRIPTION 522 Return the BFD error handler function. 523*/ 524 525bfd_error_handler_type 526bfd_get_error_handler () 527{ 528 return _bfd_error_handler; 529} 530 531/* 532SECTION 533 Symbols 534*/ 535 536/* 537FUNCTION 538 bfd_get_reloc_upper_bound 539 540SYNOPSIS 541 long bfd_get_reloc_upper_bound(bfd *abfd, asection *sect); 542 543DESCRIPTION 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 551long 552bfd_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/* 565FUNCTION 566 bfd_canonicalize_reloc 567 568SYNOPSIS 569 long bfd_canonicalize_reloc 570 (bfd *abfd, 571 asection *sec, 572 arelent **loc, 573 asymbol **syms); 574 575DESCRIPTION 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*/ 589long 590bfd_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/* 605FUNCTION 606 bfd_set_reloc 607 608SYNOPSIS 609 void bfd_set_reloc 610 (bfd *abfd, asection *sec, arelent **rel, unsigned int count) 611 612DESCRIPTION 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*/ 619void 620bfd_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/* 631FUNCTION 632 bfd_set_file_flags 633 634SYNOPSIS 635 boolean bfd_set_file_flags(bfd *abfd, flagword flags); 636 637DESCRIPTION 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 650boolean 651bfd_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 671return true; 672} 673 674void 675bfd_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/* A more or less friendly abort message. In libbfd.h abort is 683 defined to call this function. */ 684 685#ifndef EXIT_FAILURE 686#define EXIT_FAILURE 1 687#endif 688 689void 690_bfd_abort (file, line, fn) 691 const char *file; 692 int line; 693 const char *fn; 694{ 695 if (fn != NULL) 696 (*_bfd_error_handler) 697 (_("BFD internal error, aborting at %s line %d in %s\n"), 698 file, line, fn); 699 else 700 (*_bfd_error_handler) 701 (_("BFD internal error, aborting at %s line %d\n"), 702 file, line); 703 (*_bfd_error_handler) (_("Please report this bug.\n")); 704 xexit (EXIT_FAILURE); 705} 706 707/* 708FUNCTION 709 bfd_set_start_address 710 711SYNOPSIS 712 boolean bfd_set_start_address(bfd *abfd, bfd_vma vma); 713 714DESCRIPTION 715 Make @var{vma} the entry point of output BFD @var{abfd}. 716 717RETURNS 718 Returns <<true>> on success, <<false>> otherwise. 719*/ 720 721boolean 722bfd_set_start_address(abfd, vma) 723bfd *abfd; 724bfd_vma vma; 725{ 726 abfd->start_address = vma; 727 return true; 728} 729 730 731/* 732FUNCTION 733 bfd_get_mtime 734 735SYNOPSIS 736 long bfd_get_mtime(bfd *abfd); 737 738DESCRIPTION 739 Return the file modification time (as read from the file system, or 740 from the archive header for archive members). 741 742*/ 743 744long 745bfd_get_mtime (abfd) 746 bfd *abfd; 747{ 748 FILE *fp; 749 struct stat buf; 750 751 if (abfd->mtime_set) 752 return abfd->mtime; 753 754 fp = bfd_cache_lookup (abfd); 755 if (0 != fstat (fileno (fp), &buf)) 756 return 0; 757 758 abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */ 759 return buf.st_mtime; 760} 761 762/* 763FUNCTION 764 bfd_get_size 765 766SYNOPSIS 767 long bfd_get_size(bfd *abfd); 768 769DESCRIPTION 770 Return the file size (as read from file system) for the file 771 associated with BFD @var{abfd}. 772 773 The initial motivation for, and use of, this routine is not 774 so we can get the exact size of the object the BFD applies to, since 775 that might not be generally possible (archive members for example). 776 It would be ideal if someone could eventually modify 777 it so that such results were guaranteed. 778 779 Instead, we want to ask questions like "is this NNN byte sized 780 object I'm about to try read from file offset YYY reasonable?" 781 As as example of where we might do this, some object formats 782 use string tables for which the first <<sizeof(long)>> bytes of the 783 table contain the size of the table itself, including the size bytes. 784 If an application tries to read what it thinks is one of these 785 string tables, without some way to validate the size, and for 786 some reason the size is wrong (byte swapping error, wrong location 787 for the string table, etc.), the only clue is likely to be a read 788 error when it tries to read the table, or a "virtual memory 789 exhausted" error when it tries to allocate 15 bazillon bytes 790 of space for the 15 bazillon byte table it is about to read. 791 This function at least allows us to answer the quesion, "is the 792 size reasonable?". 793*/ 794 795long 796bfd_get_size (abfd) 797 bfd *abfd; 798{ 799 FILE *fp; 800 struct stat buf; 801 802 if ((abfd->flags & BFD_IN_MEMORY) != 0) 803 return ((struct bfd_in_memory *) abfd->iostream)->size; 804 805 fp = bfd_cache_lookup (abfd); 806 if (0 != fstat (fileno (fp), &buf)) 807 return 0; 808 809 return buf.st_size; 810} 811 812/* 813FUNCTION 814 bfd_get_gp_size 815 816SYNOPSIS 817 int bfd_get_gp_size(bfd *abfd); 818 819DESCRIPTION 820 Return the maximum size of objects to be optimized using the GP 821 register under MIPS ECOFF. This is typically set by the <<-G>> 822 argument to the compiler, assembler or linker. 823*/ 824 825int 826bfd_get_gp_size (abfd) 827 bfd *abfd; 828{ 829 if (abfd->format == bfd_object) 830 { 831 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 832 return ecoff_data (abfd)->gp_size; 833 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 834 return elf_gp_size (abfd); 835 } 836 return 0; 837} 838 839/* 840FUNCTION 841 bfd_set_gp_size 842 843SYNOPSIS 844 void bfd_set_gp_size(bfd *abfd, int i); 845 846DESCRIPTION 847 Set the maximum size of objects to be optimized using the GP 848 register under ECOFF or MIPS ELF. This is typically set by 849 the <<-G>> argument to the compiler, assembler or linker. 850*/ 851 852void 853bfd_set_gp_size (abfd, i) 854 bfd *abfd; 855 int i; 856{ 857 /* Don't try to set GP size on an archive or core file! */ 858 if (abfd->format != bfd_object) 859 return; 860 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 861 ecoff_data (abfd)->gp_size = i; 862 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 863 elf_gp_size (abfd) = i; 864} 865 866/* Get the GP value. This is an internal function used by some of the 867 relocation special_function routines on targets which support a GP 868 register. */ 869 870bfd_vma 871_bfd_get_gp_value (abfd) 872 bfd *abfd; 873{ 874 if (abfd->format == bfd_object) 875 { 876 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 877 return ecoff_data (abfd)->gp; 878 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 879 return elf_gp (abfd); 880 } 881 return 0; 882} 883 884/* Set the GP value. */ 885 886void 887_bfd_set_gp_value (abfd, v) 888 bfd *abfd; 889 bfd_vma v; 890{ 891 if (abfd->format != bfd_object) 892 return; 893 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 894 ecoff_data (abfd)->gp = v; 895 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 896 elf_gp (abfd) = v; 897} 898 899/* 900FUNCTION 901 bfd_scan_vma 902 903SYNOPSIS 904 bfd_vma bfd_scan_vma(CONST char *string, CONST char **end, int base); 905 906DESCRIPTION 907 Convert, like <<strtoul>>, a numerical expression 908 @var{string} into a <<bfd_vma>> integer, and return that integer. 909 (Though without as many bells and whistles as <<strtoul>>.) 910 The expression is assumed to be unsigned (i.e., positive). 911 If given a @var{base}, it is used as the base for conversion. 912 A base of 0 causes the function to interpret the string 913 in hex if a leading "0x" or "0X" is found, otherwise 914 in octal if a leading zero is found, otherwise in decimal. 915 916 Overflow is not detected. 917*/ 918 919bfd_vma 920bfd_scan_vma (string, end, base) 921 CONST char *string; 922 CONST char **end; 923 int base; 924{ 925 bfd_vma value; 926 int digit; 927 928 /* Let the host do it if possible. */ 929 if (sizeof(bfd_vma) <= sizeof(unsigned long)) 930 return (bfd_vma) strtoul (string, (char **) end, base); 931 932 /* A negative base makes no sense, and we only need to go as high as hex. */ 933 if ((base < 0) || (base > 16)) 934 return (bfd_vma) 0; 935 936 if (base == 0) 937 { 938 if (string[0] == '0') 939 { 940 if ((string[1] == 'x') || (string[1] == 'X')) 941 base = 16; 942 /* XXX should we also allow "0b" or "0B" to set base to 2? */ 943 else 944 base = 8; 945 } 946 else 947 base = 10; 948 } 949 if ((base == 16) && 950 (string[0] == '0') && ((string[1] == 'x') || (string[1] == 'X'))) 951 string += 2; 952 /* XXX should we also skip over "0b" or "0B" if base is 2? */ 953 954/* Speed could be improved with a table like hex_value[] in gas. */ 955#define HEX_VALUE(c) \ 956 (isxdigit ((unsigned char) c) \ 957 ? (isdigit ((unsigned char) c) \ 958 ? (c - '0') \ 959 : (10 + c - (islower ((unsigned char) c) ? 'a' : 'A'))) \ 960 : 42) 961 962 for (value = 0; (digit = HEX_VALUE(*string)) < base; string++) 963 { 964 value = value * base + digit; 965 } 966 967 if (end) 968 *end = string; 969 970 return value; 971} 972 973/* 974FUNCTION 975 bfd_copy_private_bfd_data 976 977SYNOPSIS 978 boolean bfd_copy_private_bfd_data(bfd *ibfd, bfd *obfd); 979 980DESCRIPTION 981 Copy private BFD information from the BFD @var{ibfd} to the 982 the BFD @var{obfd}. Return <<true>> on success, <<false>> on error. 983 Possible error returns are: 984 985 o <<bfd_error_no_memory>> - 986 Not enough memory exists to create private data for @var{obfd}. 987 988.#define bfd_copy_private_bfd_data(ibfd, obfd) \ 989. BFD_SEND (obfd, _bfd_copy_private_bfd_data, \ 990. (ibfd, obfd)) 991 992*/ 993 994/* 995FUNCTION 996 bfd_merge_private_bfd_data 997 998SYNOPSIS 999 boolean bfd_merge_private_bfd_data(bfd *ibfd, bfd *obfd); 1000 1001DESCRIPTION 1002 Merge private BFD information from the BFD @var{ibfd} to the 1003 the output file BFD @var{obfd} when linking. Return <<true>> 1004 on success, <<false>> on error. Possible error returns are: 1005 1006 o <<bfd_error_no_memory>> - 1007 Not enough memory exists to create private data for @var{obfd}. 1008 1009.#define bfd_merge_private_bfd_data(ibfd, obfd) \ 1010. BFD_SEND (obfd, _bfd_merge_private_bfd_data, \ 1011. (ibfd, obfd)) 1012 1013*/ 1014 1015/* 1016FUNCTION 1017 bfd_set_private_flags 1018 1019SYNOPSIS 1020 boolean bfd_set_private_flags(bfd *abfd, flagword flags); 1021 1022DESCRIPTION 1023 Set private BFD flag information in the BFD @var{abfd}. 1024 Return <<true>> on success, <<false>> on error. Possible error 1025 returns are: 1026 1027 o <<bfd_error_no_memory>> - 1028 Not enough memory exists to create private data for @var{obfd}. 1029 1030.#define bfd_set_private_flags(abfd, flags) \ 1031. BFD_SEND (abfd, _bfd_set_private_flags, \ 1032. (abfd, flags)) 1033 1034*/ 1035 1036/* 1037FUNCTION 1038 stuff 1039 1040DESCRIPTION 1041 Stuff which should be documented: 1042 1043.#define bfd_sizeof_headers(abfd, reloc) \ 1044. BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc)) 1045. 1046.#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \ 1047. BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, sec, syms, off, file, func, line)) 1048. 1049. {* Do these three do anything useful at all, for any back end? *} 1050.#define bfd_debug_info_start(abfd) \ 1051. BFD_SEND (abfd, _bfd_debug_info_start, (abfd)) 1052. 1053.#define bfd_debug_info_end(abfd) \ 1054. BFD_SEND (abfd, _bfd_debug_info_end, (abfd)) 1055. 1056.#define bfd_debug_info_accumulate(abfd, section) \ 1057. BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section)) 1058. 1059. 1060.#define bfd_stat_arch_elt(abfd, stat) \ 1061. BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat)) 1062. 1063.#define bfd_update_armap_timestamp(abfd) \ 1064. BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd)) 1065. 1066.#define bfd_set_arch_mach(abfd, arch, mach)\ 1067. BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach)) 1068. 1069.#define bfd_relax_section(abfd, section, link_info, again) \ 1070. BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again)) 1071. 1072.#define bfd_gc_sections(abfd, link_info) \ 1073. BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info)) 1074. 1075.#define bfd_link_hash_table_create(abfd) \ 1076. BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd)) 1077. 1078.#define bfd_link_add_symbols(abfd, info) \ 1079. BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info)) 1080. 1081.#define bfd_final_link(abfd, info) \ 1082. BFD_SEND (abfd, _bfd_final_link, (abfd, info)) 1083. 1084.#define bfd_free_cached_info(abfd) \ 1085. BFD_SEND (abfd, _bfd_free_cached_info, (abfd)) 1086. 1087.#define bfd_get_dynamic_symtab_upper_bound(abfd) \ 1088. BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd)) 1089. 1090.#define bfd_print_private_bfd_data(abfd, file)\ 1091. BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file)) 1092. 1093.#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \ 1094. BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols)) 1095. 1096.#define bfd_get_dynamic_reloc_upper_bound(abfd) \ 1097. BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd)) 1098. 1099.#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \ 1100. BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms)) 1101. 1102.extern bfd_byte *bfd_get_relocated_section_contents 1103. PARAMS ((bfd *, struct bfd_link_info *, 1104. struct bfd_link_order *, bfd_byte *, 1105. boolean, asymbol **)); 1106. 1107 1108*/ 1109 1110bfd_byte * 1111bfd_get_relocated_section_contents (abfd, link_info, link_order, data, 1112 relocateable, symbols) 1113 bfd *abfd; 1114 struct bfd_link_info *link_info; 1115 struct bfd_link_order *link_order; 1116 bfd_byte *data; 1117 boolean relocateable; 1118 asymbol **symbols; 1119{ 1120 bfd *abfd2; 1121 bfd_byte *(*fn) PARAMS ((bfd *, struct bfd_link_info *, 1122 struct bfd_link_order *, bfd_byte *, boolean, 1123 asymbol **)); 1124 1125 if (link_order->type == bfd_indirect_link_order) 1126 { 1127 abfd2 = link_order->u.indirect.section->owner; 1128 if (abfd2 == 0) 1129 abfd2 = abfd; 1130 } 1131 else 1132 abfd2 = abfd; 1133 fn = abfd2->xvec->_bfd_get_relocated_section_contents; 1134 1135 return (*fn) (abfd, link_info, link_order, data, relocateable, symbols); 1136} 1137 1138/* Record information about an ELF program header. */ 1139 1140boolean 1141bfd_record_phdr (abfd, type, flags_valid, flags, at_valid, at, 1142 includes_filehdr, includes_phdrs, count, secs) 1143 bfd *abfd; 1144 unsigned long type; 1145 boolean flags_valid; 1146 flagword flags; 1147 boolean at_valid; 1148 bfd_vma at; 1149 boolean includes_filehdr; 1150 boolean includes_phdrs; 1151 unsigned int count; 1152 asection **secs; 1153{ 1154 struct elf_segment_map *m, **pm; 1155 1156 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) 1157 return true; 1158 1159 m = ((struct elf_segment_map *) 1160 bfd_alloc (abfd, 1161 (sizeof (struct elf_segment_map) 1162 + ((size_t) count - 1) * sizeof (asection *)))); 1163 if (m == NULL) 1164 return false; 1165 1166 m->next = NULL; 1167 m->p_type = type; 1168 m->p_flags = flags; 1169 m->p_paddr = at; 1170 m->p_flags_valid = flags_valid; 1171 m->p_paddr_valid = at_valid; 1172 m->includes_filehdr = includes_filehdr; 1173 m->includes_phdrs = includes_phdrs; 1174 m->count = count; 1175 if (count > 0) 1176 memcpy (m->sections, secs, count * sizeof (asection *)); 1177 1178 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) 1179 ; 1180 *pm = m; 1181 1182 return true; 1183} 1184