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, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 3 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., 51 Franklin Street - Fifth Floor, Boston, 22 MA 02110-1301, USA. */ 23 24 /* 25 SECTION 26 <<typedef bfd>> 27 28 A BFD has type <<bfd>>; objects of this type are the 29 cornerstone of any application using BFD. Using BFD 30 consists of making references though the BFD and to data in the BFD. 31 32 Here is the structure that defines the type <<bfd>>. It 33 contains the major data about the file and pointers 34 to the rest of the data. 35 36 CODE_FRAGMENT 37 . 38 .enum bfd_direction 39 . { 40 . no_direction = 0, 41 . read_direction = 1, 42 . write_direction = 2, 43 . both_direction = 3 44 . }; 45 . 46 .struct bfd 47 .{ 48 . {* A unique identifier of the BFD *} 49 . unsigned int id; 50 . 51 . {* The filename the application opened the BFD with. *} 52 . const char *filename; 53 . 54 . {* A pointer to the target jump table. *} 55 . const struct bfd_target *xvec; 56 . 57 . {* The IOSTREAM, and corresponding IO vector that provide access 58 . to the file backing the BFD. *} 59 . void *iostream; 60 . const struct bfd_iovec *iovec; 61 . 62 . {* The caching routines use these to maintain a 63 . least-recently-used list of BFDs. *} 64 . struct bfd *lru_prev, *lru_next; 65 . 66 . {* When a file is closed by the caching routines, BFD retains 67 . state information on the file here... *} 68 . ufile_ptr where; 69 . 70 . {* File modified time, if mtime_set is TRUE. *} 71 . long mtime; 72 . 73 . {* Reserved for an unimplemented file locking extension. *} 74 . int ifd; 75 . 76 . {* The format which belongs to the BFD. (object, core, etc.) *} 77 . bfd_format format; 78 . 79 . {* The direction with which the BFD was opened. *} 80 . enum bfd_direction direction; 81 . 82 . {* Format_specific flags. *} 83 . flagword flags; 84 . 85 . {* Values that may appear in the flags field of a BFD. These also 86 . appear in the object_flags field of the bfd_target structure, where 87 . they indicate the set of flags used by that backend (not all flags 88 . are meaningful for all object file formats) (FIXME: at the moment, 89 . the object_flags values have mostly just been copied from backend 90 . to another, and are not necessarily correct). *} 91 . 92 .#define BFD_NO_FLAGS 0x00 93 . 94 . {* BFD contains relocation entries. *} 95 .#define HAS_RELOC 0x01 96 . 97 . {* BFD is directly executable. *} 98 .#define EXEC_P 0x02 99 . 100 . {* BFD has line number information (basically used for F_LNNO in a 101 . COFF header). *} 102 .#define HAS_LINENO 0x04 103 . 104 . {* BFD has debugging information. *} 105 .#define HAS_DEBUG 0x08 106 . 107 . {* BFD has symbols. *} 108 .#define HAS_SYMS 0x10 109 . 110 . {* BFD has local symbols (basically used for F_LSYMS in a COFF 111 . header). *} 112 .#define HAS_LOCALS 0x20 113 . 114 . {* BFD is a dynamic object. *} 115 .#define DYNAMIC 0x40 116 . 117 . {* Text section is write protected (if D_PAGED is not set, this is 118 . like an a.out NMAGIC file) (the linker sets this by default, but 119 . clears it for -r or -N). *} 120 .#define WP_TEXT 0x80 121 . 122 . {* BFD is dynamically paged (this is like an a.out ZMAGIC file) (the 123 . linker sets this by default, but clears it for -r or -n or -N). *} 124 .#define D_PAGED 0x100 125 . 126 . {* BFD is relaxable (this means that bfd_relax_section may be able to 127 . do something) (sometimes bfd_relax_section can do something even if 128 . this is not set). *} 129 .#define BFD_IS_RELAXABLE 0x200 130 . 131 . {* This may be set before writing out a BFD to request using a 132 . traditional format. For example, this is used to request that when 133 . writing out an a.out object the symbols not be hashed to eliminate 134 . duplicates. *} 135 .#define BFD_TRADITIONAL_FORMAT 0x400 136 . 137 . {* This flag indicates that the BFD contents are actually cached 138 . in memory. If this is set, iostream points to a bfd_in_memory 139 . struct. *} 140 .#define BFD_IN_MEMORY 0x800 141 . 142 . {* The sections in this BFD specify a memory page. *} 143 .#define HAS_LOAD_PAGE 0x1000 144 . 145 . {* This BFD has been created by the linker and doesn't correspond 146 . to any input file. *} 147 .#define BFD_LINKER_CREATED 0x2000 148 . 149 . {* This may be set before writing out a BFD to request that it 150 . be written using values for UIDs, GIDs, timestamps, etc. that 151 . will be consistent from run to run. *} 152 .#define BFD_DETERMINISTIC_OUTPUT 0x4000 153 . 154 . {* Compress sections in this BFD. *} 155 .#define BFD_COMPRESS 0x8000 156 . 157 . {* Decompress sections in this BFD. *} 158 .#define BFD_DECOMPRESS 0x10000 159 . 160 . {* Flags bits to be saved in bfd_preserve_save. *} 161 .#define BFD_FLAGS_SAVED \ 162 . (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS) 163 . 164 . {* Flags bits which are for BFD use only. *} 165 .#define BFD_FLAGS_FOR_BFD_USE_MASK \ 166 . (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \ 167 . | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT) 168 . 169 . {* Currently my_archive is tested before adding origin to 170 . anything. I believe that this can become always an add of 171 . origin, with origin set to 0 for non archive files. *} 172 . ufile_ptr origin; 173 . 174 . {* The origin in the archive of the proxy entry. This will 175 . normally be the same as origin, except for thin archives, 176 . when it will contain the current offset of the proxy in the 177 . thin archive rather than the offset of the bfd in its actual 178 . container. *} 179 . ufile_ptr proxy_origin; 180 . 181 . {* A hash table for section names. *} 182 . struct bfd_hash_table section_htab; 183 . 184 . {* Pointer to linked list of sections. *} 185 . struct bfd_section *sections; 186 . 187 . {* The last section on the section list. *} 188 . struct bfd_section *section_last; 189 . 190 . {* The number of sections. *} 191 . unsigned int section_count; 192 . 193 . {* Stuff only useful for object files: 194 . The start address. *} 195 . bfd_vma start_address; 196 . 197 . {* Used for input and output. *} 198 . unsigned int symcount; 199 . 200 . {* Symbol table for output BFD (with symcount entries). 201 . Also used by the linker to cache input BFD symbols. *} 202 . struct bfd_symbol **outsymbols; 203 . 204 . {* Used for slurped dynamic symbol tables. *} 205 . unsigned int dynsymcount; 206 . 207 . {* Pointer to structure which contains architecture information. *} 208 . const struct bfd_arch_info *arch_info; 209 . 210 . {* Stuff only useful for archives. *} 211 . void *arelt_data; 212 . struct bfd *my_archive; {* The containing archive BFD. *} 213 . struct bfd *archive_next; {* The next BFD in the archive. *} 214 . struct bfd *archive_head; {* The first BFD in the archive. *} 215 . struct bfd *nested_archives; {* List of nested archive in a flattened 216 . thin archive. *} 217 . 218 . {* A chain of BFD structures involved in a link. *} 219 . struct bfd *link_next; 220 . 221 . {* A field used by _bfd_generic_link_add_archive_symbols. This will 222 . be used only for archive elements. *} 223 . int archive_pass; 224 . 225 . {* Used by the back end to hold private data. *} 226 . union 227 . { 228 . struct aout_data_struct *aout_data; 229 . struct artdata *aout_ar_data; 230 . struct _oasys_data *oasys_obj_data; 231 . struct _oasys_ar_data *oasys_ar_data; 232 . struct coff_tdata *coff_obj_data; 233 . struct pe_tdata *pe_obj_data; 234 . struct xcoff_tdata *xcoff_obj_data; 235 . struct ecoff_tdata *ecoff_obj_data; 236 . struct ieee_data_struct *ieee_data; 237 . struct ieee_ar_data_struct *ieee_ar_data; 238 . struct srec_data_struct *srec_data; 239 . struct verilog_data_struct *verilog_data; 240 . struct ihex_data_struct *ihex_data; 241 . struct tekhex_data_struct *tekhex_data; 242 . struct elf_obj_tdata *elf_obj_data; 243 . struct nlm_obj_tdata *nlm_obj_data; 244 . struct bout_data_struct *bout_data; 245 . struct mmo_data_struct *mmo_data; 246 . struct sun_core_struct *sun_core_data; 247 . struct sco5_core_struct *sco5_core_data; 248 . struct trad_core_struct *trad_core_data; 249 . struct som_data_struct *som_data; 250 . struct hpux_core_struct *hpux_core_data; 251 . struct hppabsd_core_struct *hppabsd_core_data; 252 . struct sgi_core_struct *sgi_core_data; 253 . struct lynx_core_struct *lynx_core_data; 254 . struct osf_core_struct *osf_core_data; 255 . struct cisco_core_struct *cisco_core_data; 256 . struct versados_data_struct *versados_data; 257 . struct netbsd_core_struct *netbsd_core_data; 258 . struct mach_o_data_struct *mach_o_data; 259 . struct mach_o_fat_data_struct *mach_o_fat_data; 260 . struct plugin_data_struct *plugin_data; 261 . struct bfd_pef_data_struct *pef_data; 262 . struct bfd_pef_xlib_data_struct *pef_xlib_data; 263 . struct bfd_sym_data_struct *sym_data; 264 . void *any; 265 . } 266 . tdata; 267 . 268 . {* Used by the application to hold private data. *} 269 . void *usrdata; 270 . 271 . {* Where all the allocated stuff under this BFD goes. This is a 272 . struct objalloc *, but we use void * to avoid requiring the inclusion 273 . of objalloc.h. *} 274 . void *memory; 275 . 276 . {* Is the file descriptor being cached? That is, can it be closed as 277 . needed, and re-opened when accessed later? *} 278 . unsigned int cacheable : 1; 279 . 280 . {* Marks whether there was a default target specified when the 281 . BFD was opened. This is used to select which matching algorithm 282 . to use to choose the back end. *} 283 . unsigned int target_defaulted : 1; 284 . 285 . {* ... and here: (``once'' means at least once). *} 286 . unsigned int opened_once : 1; 287 . 288 . {* Set if we have a locally maintained mtime value, rather than 289 . getting it from the file each time. *} 290 . unsigned int mtime_set : 1; 291 . 292 . {* Flag set if symbols from this BFD should not be exported. *} 293 . unsigned int no_export : 1; 294 . 295 . {* Remember when output has begun, to stop strange things 296 . from happening. *} 297 . unsigned int output_has_begun : 1; 298 . 299 . {* Have archive map. *} 300 . unsigned int has_armap : 1; 301 . 302 . {* Set if this is a thin archive. *} 303 . unsigned int is_thin_archive : 1; 304 . 305 . {* Set if only required symbols should be added in the link hash table for 306 . this object. Used by VMS linkers. *} 307 . unsigned int selective_search : 1; 308 .}; 309 . 310 */ 311 312 #include "sysdep.h" 313 #include <stdarg.h> 314 #include "bfd.h" 315 #include "bfdver.h" 316 #include "libiberty.h" 317 #include "demangle.h" 318 #include "safe-ctype.h" 319 #include "bfdlink.h" 320 #include "libbfd.h" 321 #include "coff/internal.h" 322 #include "coff/sym.h" 323 #include "libcoff.h" 324 #include "libecoff.h" 325 #undef obj_symbols 326 #include "elf-bfd.h" 327 328 #ifndef EXIT_FAILURE 329 #define EXIT_FAILURE 1 330 #endif 331 332 333 /* provide storage for subsystem, stack and heap data which may have been 334 passed in on the command line. Ld puts this data into a bfd_link_info 335 struct which ultimately gets passed in to the bfd. When it arrives, copy 336 it to the following struct so that the data will be available in coffcode.h 337 where it is needed. The typedef's used are defined in bfd.h */ 338 339 /* 340 SECTION 341 Error reporting 342 343 Most BFD functions return nonzero on success (check their 344 individual documentation for precise semantics). On an error, 345 they call <<bfd_set_error>> to set an error condition that callers 346 can check by calling <<bfd_get_error>>. 347 If that returns <<bfd_error_system_call>>, then check 348 <<errno>>. 349 350 The easiest way to report a BFD error to the user is to 351 use <<bfd_perror>>. 352 353 SUBSECTION 354 Type <<bfd_error_type>> 355 356 The values returned by <<bfd_get_error>> are defined by the 357 enumerated type <<bfd_error_type>>. 358 359 CODE_FRAGMENT 360 . 361 .typedef enum bfd_error 362 .{ 363 . bfd_error_no_error = 0, 364 . bfd_error_system_call, 365 . bfd_error_invalid_target, 366 . bfd_error_wrong_format, 367 . bfd_error_wrong_object_format, 368 . bfd_error_invalid_operation, 369 . bfd_error_no_memory, 370 . bfd_error_no_symbols, 371 . bfd_error_no_armap, 372 . bfd_error_no_more_archived_files, 373 . bfd_error_malformed_archive, 374 . bfd_error_file_not_recognized, 375 . bfd_error_file_ambiguously_recognized, 376 . bfd_error_no_contents, 377 . bfd_error_nonrepresentable_section, 378 . bfd_error_no_debug_section, 379 . bfd_error_bad_value, 380 . bfd_error_file_truncated, 381 . bfd_error_file_too_big, 382 . bfd_error_on_input, 383 . bfd_error_invalid_error_code 384 .} 385 .bfd_error_type; 386 . 387 */ 388 389 static bfd_error_type bfd_error = bfd_error_no_error; 390 static bfd *input_bfd = NULL; 391 static bfd_error_type input_error = bfd_error_no_error; 392 393 const char *const bfd_errmsgs[] = 394 { 395 N_("No error"), 396 N_("System call error"), 397 N_("Invalid bfd target"), 398 N_("File in wrong format"), 399 N_("Archive object file in wrong format"), 400 N_("Invalid operation"), 401 N_("Memory exhausted"), 402 N_("No symbols"), 403 N_("Archive has no index; run ranlib to add one"), 404 N_("No more archived files"), 405 N_("Malformed archive"), 406 N_("File format not recognized"), 407 N_("File format is ambiguous"), 408 N_("Section has no contents"), 409 N_("Nonrepresentable section on output"), 410 N_("Symbol needs debug section which does not exist"), 411 N_("Bad value"), 412 N_("File truncated"), 413 N_("File too big"), 414 N_("Error reading %s: %s"), 415 N_("#<Invalid error code>") 416 }; 417 418 /* 419 FUNCTION 420 bfd_get_error 421 422 SYNOPSIS 423 bfd_error_type bfd_get_error (void); 424 425 DESCRIPTION 426 Return the current BFD error condition. 427 */ 428 429 bfd_error_type 430 bfd_get_error (void) 431 { 432 return bfd_error; 433 } 434 435 /* 436 FUNCTION 437 bfd_set_error 438 439 SYNOPSIS 440 void bfd_set_error (bfd_error_type error_tag, ...); 441 442 DESCRIPTION 443 Set the BFD error condition to be @var{error_tag}. 444 If @var{error_tag} is bfd_error_on_input, then this function 445 takes two more parameters, the input bfd where the error 446 occurred, and the bfd_error_type error. 447 */ 448 449 void 450 bfd_set_error (bfd_error_type error_tag, ...) 451 { 452 bfd_error = error_tag; 453 if (error_tag == bfd_error_on_input) 454 { 455 /* This is an error that occurred during bfd_close when 456 writing an archive, but on one of the input files. */ 457 va_list ap; 458 459 va_start (ap, error_tag); 460 input_bfd = va_arg (ap, bfd *); 461 input_error = (bfd_error_type) va_arg (ap, int); 462 if (input_error >= bfd_error_on_input) 463 abort (); 464 va_end (ap); 465 } 466 } 467 468 /* 469 FUNCTION 470 bfd_errmsg 471 472 SYNOPSIS 473 const char *bfd_errmsg (bfd_error_type error_tag); 474 475 DESCRIPTION 476 Return a string describing the error @var{error_tag}, or 477 the system error if @var{error_tag} is <<bfd_error_system_call>>. 478 */ 479 480 const char * 481 bfd_errmsg (bfd_error_type error_tag) 482 { 483 #ifndef errno 484 extern int errno; 485 #endif 486 if (error_tag == bfd_error_on_input) 487 { 488 char *buf; 489 const char *msg = bfd_errmsg (input_error); 490 491 if (asprintf (&buf, _(bfd_errmsgs [error_tag]), input_bfd->filename, msg) 492 != -1) 493 return buf; 494 495 /* Ick, what to do on out of memory? */ 496 return msg; 497 } 498 499 if (error_tag == bfd_error_system_call) 500 return xstrerror (errno); 501 502 if (error_tag > bfd_error_invalid_error_code) 503 error_tag = bfd_error_invalid_error_code; /* sanity check */ 504 505 return _(bfd_errmsgs [error_tag]); 506 } 507 508 /* 509 FUNCTION 510 bfd_perror 511 512 SYNOPSIS 513 void bfd_perror (const char *message); 514 515 DESCRIPTION 516 Print to the standard error stream a string describing the 517 last BFD error that occurred, or the last system error if 518 the last BFD error was a system call failure. If @var{message} 519 is non-NULL and non-empty, the error string printed is preceded 520 by @var{message}, a colon, and a space. It is followed by a newline. 521 */ 522 523 void 524 bfd_perror (const char *message) 525 { 526 fflush (stdout); 527 if (message == NULL || *message == '\0') 528 fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ())); 529 else 530 fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ())); 531 fflush (stderr); 532 } 533 534 /* 535 SUBSECTION 536 BFD error handler 537 538 Some BFD functions want to print messages describing the 539 problem. They call a BFD error handler function. This 540 function may be overridden by the program. 541 542 The BFD error handler acts like printf. 543 544 CODE_FRAGMENT 545 . 546 .typedef void (*bfd_error_handler_type) (const char *, ...); 547 . 548 */ 549 550 /* The program name used when printing BFD error messages. */ 551 552 static const char *_bfd_error_program_name; 553 554 /* This is the default routine to handle BFD error messages. 555 Like fprintf (stderr, ...), but also handles some extra format specifiers. 556 557 %A section name from section. For group components, print group name too. 558 %B file name from bfd. For archive components, prints archive too. 559 560 Note - because these two extra format specifiers require special handling 561 they are scanned for and processed in this function, before calling 562 vfprintf. This means that the *arguments* for these format specifiers 563 must be the first ones in the variable argument list, regardless of where 564 the specifiers appear in the format string. Thus for example calling 565 this function with a format string of: 566 567 "blah %s blah %A blah %d blah %B" 568 569 would involve passing the arguments as: 570 571 "blah %s blah %A blah %d blah %B", 572 asection_for_the_%A, 573 bfd_for_the_%B, 574 string_for_the_%s, 575 integer_for_the_%d); 576 */ 577 578 void 579 _bfd_default_error_handler (const char *fmt, ...) 580 { 581 va_list ap; 582 char *bufp; 583 const char *new_fmt, *p; 584 size_t avail = 1000; 585 char buf[1000]; 586 587 /* PR 4992: Don't interrupt output being sent to stdout. */ 588 fflush (stdout); 589 590 if (_bfd_error_program_name != NULL) 591 fprintf (stderr, "%s: ", _bfd_error_program_name); 592 else 593 fprintf (stderr, "BFD: "); 594 595 va_start (ap, fmt); 596 new_fmt = fmt; 597 bufp = buf; 598 599 /* Reserve enough space for the existing format string. */ 600 avail -= strlen (fmt) + 1; 601 if (avail > 1000) 602 _exit (EXIT_FAILURE); 603 604 p = fmt; 605 while (1) 606 { 607 char *q; 608 size_t len, extra, trim; 609 610 p = strchr (p, '%'); 611 if (p == NULL || p[1] == '\0') 612 { 613 if (new_fmt == buf) 614 { 615 len = strlen (fmt); 616 memcpy (bufp, fmt, len + 1); 617 } 618 break; 619 } 620 621 if (p[1] == 'A' || p[1] == 'B') 622 { 623 len = p - fmt; 624 memcpy (bufp, fmt, len); 625 bufp += len; 626 fmt = p + 2; 627 new_fmt = buf; 628 629 /* If we run out of space, tough, you lose your ridiculously 630 long file or section name. It's not safe to try to alloc 631 memory here; We might be printing an out of memory message. */ 632 if (avail == 0) 633 { 634 *bufp++ = '*'; 635 *bufp++ = '*'; 636 *bufp = '\0'; 637 } 638 else 639 { 640 if (p[1] == 'B') 641 { 642 bfd *abfd = va_arg (ap, bfd *); 643 644 if (abfd == NULL) 645 /* Invoking %B with a null bfd pointer is an internal error. */ 646 abort (); 647 else if (abfd->my_archive) 648 snprintf (bufp, avail, "%s(%s)", 649 abfd->my_archive->filename, abfd->filename); 650 else 651 snprintf (bufp, avail, "%s", abfd->filename); 652 } 653 else 654 { 655 asection *sec = va_arg (ap, asection *); 656 bfd *abfd; 657 const char *group = NULL; 658 struct coff_comdat_info *ci; 659 660 if (sec == NULL) 661 /* Invoking %A with a null section pointer is an internal error. */ 662 abort (); 663 abfd = sec->owner; 664 if (abfd != NULL 665 && bfd_get_flavour (abfd) == bfd_target_elf_flavour 666 && elf_next_in_group (sec) != NULL 667 && (sec->flags & SEC_GROUP) == 0) 668 group = elf_group_name (sec); 669 else if (abfd != NULL 670 && bfd_get_flavour (abfd) == bfd_target_coff_flavour 671 && (ci = bfd_coff_get_comdat_section (sec->owner, 672 sec)) != NULL) 673 group = ci->name; 674 if (group != NULL) 675 snprintf (bufp, avail, "%s[%s]", sec->name, group); 676 else 677 snprintf (bufp, avail, "%s", sec->name); 678 } 679 len = strlen (bufp); 680 avail = avail - len + 2; 681 682 /* We need to replace any '%' we printed by "%%". 683 First count how many. */ 684 q = bufp; 685 bufp += len; 686 extra = 0; 687 while ((q = strchr (q, '%')) != NULL) 688 { 689 ++q; 690 ++extra; 691 } 692 693 /* If there isn't room, trim off the end of the string. */ 694 q = bufp; 695 bufp += extra; 696 if (extra > avail) 697 { 698 trim = extra - avail; 699 bufp -= trim; 700 do 701 { 702 if (*--q == '%') 703 --extra; 704 } 705 while (--trim != 0); 706 *q = '\0'; 707 avail = extra; 708 } 709 avail -= extra; 710 711 /* Now double all '%' chars, shuffling the string as we go. */ 712 while (extra != 0) 713 { 714 while ((q[extra] = *q) != '%') 715 --q; 716 q[--extra] = '%'; 717 --q; 718 } 719 } 720 } 721 p = p + 2; 722 } 723 724 vfprintf (stderr, new_fmt, ap); 725 va_end (ap); 726 727 putc ('\n', stderr); 728 fflush (stderr); 729 } 730 731 /* This is a function pointer to the routine which should handle BFD 732 error messages. It is called when a BFD routine encounters an 733 error for which it wants to print a message. Going through a 734 function pointer permits a program linked against BFD to intercept 735 the messages and deal with them itself. */ 736 737 bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler; 738 739 /* 740 FUNCTION 741 bfd_set_error_handler 742 743 SYNOPSIS 744 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type); 745 746 DESCRIPTION 747 Set the BFD error handler function. Returns the previous 748 function. 749 */ 750 751 bfd_error_handler_type 752 bfd_set_error_handler (bfd_error_handler_type pnew) 753 { 754 bfd_error_handler_type pold; 755 756 pold = _bfd_error_handler; 757 _bfd_error_handler = pnew; 758 return pold; 759 } 760 761 /* 762 FUNCTION 763 bfd_set_error_program_name 764 765 SYNOPSIS 766 void bfd_set_error_program_name (const char *); 767 768 DESCRIPTION 769 Set the program name to use when printing a BFD error. This 770 is printed before the error message followed by a colon and 771 space. The string must not be changed after it is passed to 772 this function. 773 */ 774 775 void 776 bfd_set_error_program_name (const char *name) 777 { 778 _bfd_error_program_name = name; 779 } 780 781 /* 782 FUNCTION 783 bfd_get_error_handler 784 785 SYNOPSIS 786 bfd_error_handler_type bfd_get_error_handler (void); 787 788 DESCRIPTION 789 Return the BFD error handler function. 790 */ 791 792 bfd_error_handler_type 793 bfd_get_error_handler (void) 794 { 795 return _bfd_error_handler; 796 } 797 798 /* 799 SECTION 800 Miscellaneous 801 802 SUBSECTION 803 Miscellaneous functions 804 */ 805 806 /* 807 FUNCTION 808 bfd_get_reloc_upper_bound 809 810 SYNOPSIS 811 long bfd_get_reloc_upper_bound (bfd *abfd, asection *sect); 812 813 DESCRIPTION 814 Return the number of bytes required to store the 815 relocation information associated with section @var{sect} 816 attached to bfd @var{abfd}. If an error occurs, return -1. 817 818 */ 819 820 long 821 bfd_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) 822 { 823 if (abfd->format != bfd_object) 824 { 825 bfd_set_error (bfd_error_invalid_operation); 826 return -1; 827 } 828 829 return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect)); 830 } 831 832 /* 833 FUNCTION 834 bfd_canonicalize_reloc 835 836 SYNOPSIS 837 long bfd_canonicalize_reloc 838 (bfd *abfd, asection *sec, arelent **loc, asymbol **syms); 839 840 DESCRIPTION 841 Call the back end associated with the open BFD 842 @var{abfd} and translate the external form of the relocation 843 information attached to @var{sec} into the internal canonical 844 form. Place the table into memory at @var{loc}, which has 845 been preallocated, usually by a call to 846 <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or 847 -1 on error. 848 849 The @var{syms} table is also needed for horrible internal magic 850 reasons. 851 852 */ 853 long 854 bfd_canonicalize_reloc (bfd *abfd, 855 sec_ptr asect, 856 arelent **location, 857 asymbol **symbols) 858 { 859 if (abfd->format != bfd_object) 860 { 861 bfd_set_error (bfd_error_invalid_operation); 862 return -1; 863 } 864 865 return BFD_SEND (abfd, _bfd_canonicalize_reloc, 866 (abfd, asect, location, symbols)); 867 } 868 869 /* 870 FUNCTION 871 bfd_set_reloc 872 873 SYNOPSIS 874 void bfd_set_reloc 875 (bfd *abfd, asection *sec, arelent **rel, unsigned int count); 876 877 DESCRIPTION 878 Set the relocation pointer and count within 879 section @var{sec} to the values @var{rel} and @var{count}. 880 The argument @var{abfd} is ignored. 881 882 */ 883 884 void 885 bfd_set_reloc (bfd *ignore_abfd ATTRIBUTE_UNUSED, 886 sec_ptr asect, 887 arelent **location, 888 unsigned int count) 889 { 890 asect->orelocation = location; 891 asect->reloc_count = count; 892 } 893 894 /* 895 FUNCTION 896 bfd_set_file_flags 897 898 SYNOPSIS 899 bfd_boolean bfd_set_file_flags (bfd *abfd, flagword flags); 900 901 DESCRIPTION 902 Set the flag word in the BFD @var{abfd} to the value @var{flags}. 903 904 Possible errors are: 905 o <<bfd_error_wrong_format>> - The target bfd was not of object format. 906 o <<bfd_error_invalid_operation>> - The target bfd was open for reading. 907 o <<bfd_error_invalid_operation>> - 908 The flag word contained a bit which was not applicable to the 909 type of file. E.g., an attempt was made to set the <<D_PAGED>> bit 910 on a BFD format which does not support demand paging. 911 912 */ 913 914 bfd_boolean 915 bfd_set_file_flags (bfd *abfd, flagword flags) 916 { 917 if (abfd->format != bfd_object) 918 { 919 bfd_set_error (bfd_error_wrong_format); 920 return FALSE; 921 } 922 923 if (bfd_read_p (abfd)) 924 { 925 bfd_set_error (bfd_error_invalid_operation); 926 return FALSE; 927 } 928 929 bfd_get_file_flags (abfd) = flags; 930 if ((flags & bfd_applicable_file_flags (abfd)) != flags) 931 { 932 bfd_set_error (bfd_error_invalid_operation); 933 return FALSE; 934 } 935 936 return TRUE; 937 } 938 939 void 940 bfd_assert (const char *file, int line) 941 { 942 (*_bfd_error_handler) (_("BFD %s assertion fail %s:%d"), 943 BFD_VERSION_STRING, file, line); 944 } 945 946 /* A more or less friendly abort message. In libbfd.h abort is 947 defined to call this function. */ 948 949 void 950 _bfd_abort (const char *file, int line, const char *fn) 951 { 952 if (fn != NULL) 953 (*_bfd_error_handler) 954 (_("BFD %s internal error, aborting at %s line %d in %s\n"), 955 BFD_VERSION_STRING, file, line, fn); 956 else 957 (*_bfd_error_handler) 958 (_("BFD %s internal error, aborting at %s line %d\n"), 959 BFD_VERSION_STRING, file, line); 960 (*_bfd_error_handler) (_("Please report this bug.\n")); 961 _exit (EXIT_FAILURE); 962 } 963 964 /* 965 FUNCTION 966 bfd_get_arch_size 967 968 SYNOPSIS 969 int bfd_get_arch_size (bfd *abfd); 970 971 DESCRIPTION 972 Returns the architecture address size, in bits, as determined 973 by the object file's format. For ELF, this information is 974 included in the header. 975 976 RETURNS 977 Returns the arch size in bits if known, <<-1>> otherwise. 978 */ 979 980 int 981 bfd_get_arch_size (bfd *abfd) 982 { 983 if (abfd->xvec->flavour == bfd_target_elf_flavour) 984 return get_elf_backend_data (abfd)->s->arch_size; 985 986 return -1; 987 } 988 989 /* 990 FUNCTION 991 bfd_get_sign_extend_vma 992 993 SYNOPSIS 994 int bfd_get_sign_extend_vma (bfd *abfd); 995 996 DESCRIPTION 997 Indicates if the target architecture "naturally" sign extends 998 an address. Some architectures implicitly sign extend address 999 values when they are converted to types larger than the size 1000 of an address. For instance, bfd_get_start_address() will 1001 return an address sign extended to fill a bfd_vma when this is 1002 the case. 1003 1004 RETURNS 1005 Returns <<1>> if the target architecture is known to sign 1006 extend addresses, <<0>> if the target architecture is known to 1007 not sign extend addresses, and <<-1>> otherwise. 1008 */ 1009 1010 int 1011 bfd_get_sign_extend_vma (bfd *abfd) 1012 { 1013 char *name; 1014 1015 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) 1016 return get_elf_backend_data (abfd)->sign_extend_vma; 1017 1018 name = bfd_get_target (abfd); 1019 1020 /* Return a proper value for DJGPP & PE COFF. 1021 This function is required for DWARF2 support, but there is 1022 no place to store this information in the COFF back end. 1023 Should enough other COFF targets add support for DWARF2, 1024 a place will have to be found. Until then, this hack will do. */ 1025 if (CONST_STRNEQ (name, "coff-go32") 1026 || strcmp (name, "pe-i386") == 0 1027 || strcmp (name, "pei-i386") == 0 1028 || strcmp (name, "pe-x86-64") == 0 1029 || strcmp (name, "pei-x86-64") == 0 1030 || strcmp (name, "pe-arm-wince-little") == 0 1031 || strcmp (name, "pei-arm-wince-little") == 0) 1032 return 1; 1033 1034 if (CONST_STRNEQ (name, "mach-o")) 1035 return 0; 1036 1037 bfd_set_error (bfd_error_wrong_format); 1038 return -1; 1039 } 1040 1041 /* 1042 FUNCTION 1043 bfd_set_start_address 1044 1045 SYNOPSIS 1046 bfd_boolean bfd_set_start_address (bfd *abfd, bfd_vma vma); 1047 1048 DESCRIPTION 1049 Make @var{vma} the entry point of output BFD @var{abfd}. 1050 1051 RETURNS 1052 Returns <<TRUE>> on success, <<FALSE>> otherwise. 1053 */ 1054 1055 bfd_boolean 1056 bfd_set_start_address (bfd *abfd, bfd_vma vma) 1057 { 1058 abfd->start_address = vma; 1059 return TRUE; 1060 } 1061 1062 /* 1063 FUNCTION 1064 bfd_get_gp_size 1065 1066 SYNOPSIS 1067 unsigned int bfd_get_gp_size (bfd *abfd); 1068 1069 DESCRIPTION 1070 Return the maximum size of objects to be optimized using the GP 1071 register under MIPS ECOFF. This is typically set by the <<-G>> 1072 argument to the compiler, assembler or linker. 1073 */ 1074 1075 unsigned int 1076 bfd_get_gp_size (bfd *abfd) 1077 { 1078 if (abfd->format == bfd_object) 1079 { 1080 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 1081 return ecoff_data (abfd)->gp_size; 1082 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 1083 return elf_gp_size (abfd); 1084 } 1085 return 0; 1086 } 1087 1088 /* 1089 FUNCTION 1090 bfd_set_gp_size 1091 1092 SYNOPSIS 1093 void bfd_set_gp_size (bfd *abfd, unsigned int i); 1094 1095 DESCRIPTION 1096 Set the maximum size of objects to be optimized using the GP 1097 register under ECOFF or MIPS ELF. This is typically set by 1098 the <<-G>> argument to the compiler, assembler or linker. 1099 */ 1100 1101 void 1102 bfd_set_gp_size (bfd *abfd, unsigned int i) 1103 { 1104 /* Don't try to set GP size on an archive or core file! */ 1105 if (abfd->format != bfd_object) 1106 return; 1107 1108 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 1109 ecoff_data (abfd)->gp_size = i; 1110 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 1111 elf_gp_size (abfd) = i; 1112 } 1113 1114 /* Get the GP value. This is an internal function used by some of the 1115 relocation special_function routines on targets which support a GP 1116 register. */ 1117 1118 bfd_vma 1119 _bfd_get_gp_value (bfd *abfd) 1120 { 1121 if (! abfd) 1122 return 0; 1123 if (abfd->format != bfd_object) 1124 return 0; 1125 1126 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 1127 return ecoff_data (abfd)->gp; 1128 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 1129 return elf_gp (abfd); 1130 1131 return 0; 1132 } 1133 1134 /* Set the GP value. */ 1135 1136 void 1137 _bfd_set_gp_value (bfd *abfd, bfd_vma v) 1138 { 1139 if (! abfd) 1140 abort (); 1141 if (abfd->format != bfd_object) 1142 return; 1143 1144 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 1145 ecoff_data (abfd)->gp = v; 1146 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 1147 elf_gp (abfd) = v; 1148 } 1149 1150 /* 1151 FUNCTION 1152 bfd_scan_vma 1153 1154 SYNOPSIS 1155 bfd_vma bfd_scan_vma (const char *string, const char **end, int base); 1156 1157 DESCRIPTION 1158 Convert, like <<strtoul>>, a numerical expression 1159 @var{string} into a <<bfd_vma>> integer, and return that integer. 1160 (Though without as many bells and whistles as <<strtoul>>.) 1161 The expression is assumed to be unsigned (i.e., positive). 1162 If given a @var{base}, it is used as the base for conversion. 1163 A base of 0 causes the function to interpret the string 1164 in hex if a leading "0x" or "0X" is found, otherwise 1165 in octal if a leading zero is found, otherwise in decimal. 1166 1167 If the value would overflow, the maximum <<bfd_vma>> value is 1168 returned. 1169 */ 1170 1171 bfd_vma 1172 bfd_scan_vma (const char *string, const char **end, int base) 1173 { 1174 bfd_vma value; 1175 bfd_vma cutoff; 1176 unsigned int cutlim; 1177 int overflow; 1178 1179 /* Let the host do it if possible. */ 1180 if (sizeof (bfd_vma) <= sizeof (unsigned long)) 1181 return strtoul (string, (char **) end, base); 1182 1183 #ifdef HAVE_STRTOULL 1184 if (sizeof (bfd_vma) <= sizeof (unsigned long long)) 1185 return strtoull (string, (char **) end, base); 1186 #endif 1187 1188 if (base == 0) 1189 { 1190 if (string[0] == '0') 1191 { 1192 if ((string[1] == 'x') || (string[1] == 'X')) 1193 base = 16; 1194 else 1195 base = 8; 1196 } 1197 } 1198 1199 if ((base < 2) || (base > 36)) 1200 base = 10; 1201 1202 if (base == 16 1203 && string[0] == '0' 1204 && (string[1] == 'x' || string[1] == 'X') 1205 && ISXDIGIT (string[2])) 1206 { 1207 string += 2; 1208 } 1209 1210 cutoff = (~ (bfd_vma) 0) / (bfd_vma) base; 1211 cutlim = (~ (bfd_vma) 0) % (bfd_vma) base; 1212 value = 0; 1213 overflow = 0; 1214 while (1) 1215 { 1216 unsigned int digit; 1217 1218 digit = *string; 1219 if (ISDIGIT (digit)) 1220 digit = digit - '0'; 1221 else if (ISALPHA (digit)) 1222 digit = TOUPPER (digit) - 'A' + 10; 1223 else 1224 break; 1225 if (digit >= (unsigned int) base) 1226 break; 1227 if (value > cutoff || (value == cutoff && digit > cutlim)) 1228 overflow = 1; 1229 value = value * base + digit; 1230 ++string; 1231 } 1232 1233 if (overflow) 1234 value = ~ (bfd_vma) 0; 1235 1236 if (end != NULL) 1237 *end = string; 1238 1239 return value; 1240 } 1241 1242 /* 1243 FUNCTION 1244 bfd_copy_private_header_data 1245 1246 SYNOPSIS 1247 bfd_boolean bfd_copy_private_header_data (bfd *ibfd, bfd *obfd); 1248 1249 DESCRIPTION 1250 Copy private BFD header information from the BFD @var{ibfd} to the 1251 the BFD @var{obfd}. This copies information that may require 1252 sections to exist, but does not require symbol tables. Return 1253 <<true>> on success, <<false>> on error. 1254 Possible error returns are: 1255 1256 o <<bfd_error_no_memory>> - 1257 Not enough memory exists to create private data for @var{obfd}. 1258 1259 .#define bfd_copy_private_header_data(ibfd, obfd) \ 1260 . BFD_SEND (obfd, _bfd_copy_private_header_data, \ 1261 . (ibfd, obfd)) 1262 1263 */ 1264 1265 /* 1266 FUNCTION 1267 bfd_copy_private_bfd_data 1268 1269 SYNOPSIS 1270 bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd); 1271 1272 DESCRIPTION 1273 Copy private BFD information from the BFD @var{ibfd} to the 1274 the BFD @var{obfd}. Return <<TRUE>> on success, <<FALSE>> on error. 1275 Possible error returns are: 1276 1277 o <<bfd_error_no_memory>> - 1278 Not enough memory exists to create private data for @var{obfd}. 1279 1280 .#define bfd_copy_private_bfd_data(ibfd, obfd) \ 1281 . BFD_SEND (obfd, _bfd_copy_private_bfd_data, \ 1282 . (ibfd, obfd)) 1283 1284 */ 1285 1286 /* 1287 FUNCTION 1288 bfd_merge_private_bfd_data 1289 1290 SYNOPSIS 1291 bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd); 1292 1293 DESCRIPTION 1294 Merge private BFD information from the BFD @var{ibfd} to the 1295 the output file BFD @var{obfd} when linking. Return <<TRUE>> 1296 on success, <<FALSE>> on error. Possible error returns are: 1297 1298 o <<bfd_error_no_memory>> - 1299 Not enough memory exists to create private data for @var{obfd}. 1300 1301 .#define bfd_merge_private_bfd_data(ibfd, obfd) \ 1302 . BFD_SEND (obfd, _bfd_merge_private_bfd_data, \ 1303 . (ibfd, obfd)) 1304 1305 */ 1306 1307 /* 1308 FUNCTION 1309 bfd_set_private_flags 1310 1311 SYNOPSIS 1312 bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags); 1313 1314 DESCRIPTION 1315 Set private BFD flag information in the BFD @var{abfd}. 1316 Return <<TRUE>> on success, <<FALSE>> on error. Possible error 1317 returns are: 1318 1319 o <<bfd_error_no_memory>> - 1320 Not enough memory exists to create private data for @var{obfd}. 1321 1322 .#define bfd_set_private_flags(abfd, flags) \ 1323 . BFD_SEND (abfd, _bfd_set_private_flags, (abfd, flags)) 1324 1325 */ 1326 1327 /* 1328 FUNCTION 1329 Other functions 1330 1331 DESCRIPTION 1332 The following functions exist but have not yet been documented. 1333 1334 .#define bfd_sizeof_headers(abfd, info) \ 1335 . BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, info)) 1336 . 1337 .#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \ 1338 . BFD_SEND (abfd, _bfd_find_nearest_line, \ 1339 . (abfd, sec, syms, off, file, func, line)) 1340 . 1341 .#define bfd_find_line(abfd, syms, sym, file, line) \ 1342 . BFD_SEND (abfd, _bfd_find_line, \ 1343 . (abfd, syms, sym, file, line)) 1344 . 1345 .#define bfd_find_inliner_info(abfd, file, func, line) \ 1346 . BFD_SEND (abfd, _bfd_find_inliner_info, \ 1347 . (abfd, file, func, line)) 1348 . 1349 .#define bfd_debug_info_start(abfd) \ 1350 . BFD_SEND (abfd, _bfd_debug_info_start, (abfd)) 1351 . 1352 .#define bfd_debug_info_end(abfd) \ 1353 . BFD_SEND (abfd, _bfd_debug_info_end, (abfd)) 1354 . 1355 .#define bfd_debug_info_accumulate(abfd, section) \ 1356 . BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section)) 1357 . 1358 .#define bfd_stat_arch_elt(abfd, stat) \ 1359 . BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat)) 1360 . 1361 .#define bfd_update_armap_timestamp(abfd) \ 1362 . BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd)) 1363 . 1364 .#define bfd_set_arch_mach(abfd, arch, mach)\ 1365 . BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach)) 1366 . 1367 .#define bfd_relax_section(abfd, section, link_info, again) \ 1368 . BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again)) 1369 . 1370 .#define bfd_gc_sections(abfd, link_info) \ 1371 . BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info)) 1372 . 1373 .#define bfd_merge_sections(abfd, link_info) \ 1374 . BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info)) 1375 . 1376 .#define bfd_is_group_section(abfd, sec) \ 1377 . BFD_SEND (abfd, _bfd_is_group_section, (abfd, sec)) 1378 . 1379 .#define bfd_discard_group(abfd, sec) \ 1380 . BFD_SEND (abfd, _bfd_discard_group, (abfd, sec)) 1381 . 1382 .#define bfd_link_hash_table_create(abfd) \ 1383 . BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd)) 1384 . 1385 .#define bfd_link_hash_table_free(abfd, hash) \ 1386 . BFD_SEND (abfd, _bfd_link_hash_table_free, (hash)) 1387 . 1388 .#define bfd_link_add_symbols(abfd, info) \ 1389 . BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info)) 1390 . 1391 .#define bfd_link_just_syms(abfd, sec, info) \ 1392 . BFD_SEND (abfd, _bfd_link_just_syms, (sec, info)) 1393 . 1394 .#define bfd_final_link(abfd, info) \ 1395 . BFD_SEND (abfd, _bfd_final_link, (abfd, info)) 1396 . 1397 .#define bfd_free_cached_info(abfd) \ 1398 . BFD_SEND (abfd, _bfd_free_cached_info, (abfd)) 1399 . 1400 .#define bfd_get_dynamic_symtab_upper_bound(abfd) \ 1401 . BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd)) 1402 . 1403 .#define bfd_print_private_bfd_data(abfd, file)\ 1404 . BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file)) 1405 . 1406 .#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \ 1407 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols)) 1408 . 1409 .#define bfd_get_synthetic_symtab(abfd, count, syms, dyncount, dynsyms, ret) \ 1410 . BFD_SEND (abfd, _bfd_get_synthetic_symtab, (abfd, count, syms, \ 1411 . dyncount, dynsyms, ret)) 1412 . 1413 .#define bfd_get_dynamic_reloc_upper_bound(abfd) \ 1414 . BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd)) 1415 . 1416 .#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \ 1417 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms)) 1418 . 1419 .extern bfd_byte *bfd_get_relocated_section_contents 1420 . (bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *, 1421 . bfd_boolean, asymbol **); 1422 . 1423 1424 */ 1425 1426 bfd_byte * 1427 bfd_get_relocated_section_contents (bfd *abfd, 1428 struct bfd_link_info *link_info, 1429 struct bfd_link_order *link_order, 1430 bfd_byte *data, 1431 bfd_boolean relocatable, 1432 asymbol **symbols) 1433 { 1434 bfd *abfd2; 1435 bfd_byte *(*fn) (bfd *, struct bfd_link_info *, struct bfd_link_order *, 1436 bfd_byte *, bfd_boolean, asymbol **); 1437 1438 if (link_order->type == bfd_indirect_link_order) 1439 { 1440 abfd2 = link_order->u.indirect.section->owner; 1441 if (abfd2 == NULL) 1442 abfd2 = abfd; 1443 } 1444 else 1445 abfd2 = abfd; 1446 1447 fn = abfd2->xvec->_bfd_get_relocated_section_contents; 1448 1449 return (*fn) (abfd, link_info, link_order, data, relocatable, symbols); 1450 } 1451 1452 /* Record information about an ELF program header. */ 1453 1454 bfd_boolean 1455 bfd_record_phdr (bfd *abfd, 1456 unsigned long type, 1457 bfd_boolean flags_valid, 1458 flagword flags, 1459 bfd_boolean at_valid, 1460 bfd_vma at, 1461 bfd_boolean includes_filehdr, 1462 bfd_boolean includes_phdrs, 1463 unsigned int count, 1464 asection **secs) 1465 { 1466 struct elf_segment_map *m, **pm; 1467 bfd_size_type amt; 1468 1469 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) 1470 return TRUE; 1471 1472 amt = sizeof (struct elf_segment_map); 1473 amt += ((bfd_size_type) count - 1) * sizeof (asection *); 1474 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt); 1475 if (m == NULL) 1476 return FALSE; 1477 1478 m->p_type = type; 1479 m->p_flags = flags; 1480 m->p_paddr = at; 1481 m->p_flags_valid = flags_valid; 1482 m->p_paddr_valid = at_valid; 1483 m->includes_filehdr = includes_filehdr; 1484 m->includes_phdrs = includes_phdrs; 1485 m->count = count; 1486 if (count > 0) 1487 memcpy (m->sections, secs, count * sizeof (asection *)); 1488 1489 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) 1490 ; 1491 *pm = m; 1492 1493 return TRUE; 1494 } 1495 1496 #ifdef BFD64 1497 /* Return true iff this target is 32-bit. */ 1498 1499 static bfd_boolean 1500 is32bit (bfd *abfd) 1501 { 1502 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) 1503 { 1504 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 1505 return bed->s->elfclass == ELFCLASS32; 1506 } 1507 1508 /* For non-ELF targets, use architecture information. */ 1509 return bfd_arch_bits_per_address (abfd) <= 32; 1510 } 1511 #endif 1512 1513 /* bfd_sprintf_vma and bfd_fprintf_vma display an address in the 1514 target's address size. */ 1515 1516 void 1517 bfd_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value) 1518 { 1519 #ifdef BFD64 1520 if (is32bit (abfd)) 1521 { 1522 sprintf (buf, "%08lx", (unsigned long) value & 0xffffffff); 1523 return; 1524 } 1525 #endif 1526 sprintf_vma (buf, value); 1527 } 1528 1529 void 1530 bfd_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value) 1531 { 1532 #ifdef BFD64 1533 if (is32bit (abfd)) 1534 { 1535 fprintf ((FILE *) stream, "%08lx", (unsigned long) value & 0xffffffff); 1536 return; 1537 } 1538 #endif 1539 fprintf_vma ((FILE *) stream, value); 1540 } 1541 1542 /* 1543 FUNCTION 1544 bfd_alt_mach_code 1545 1546 SYNOPSIS 1547 bfd_boolean bfd_alt_mach_code (bfd *abfd, int alternative); 1548 1549 DESCRIPTION 1550 1551 When more than one machine code number is available for the 1552 same machine type, this function can be used to switch between 1553 the preferred one (alternative == 0) and any others. Currently, 1554 only ELF supports this feature, with up to two alternate 1555 machine codes. 1556 */ 1557 1558 bfd_boolean 1559 bfd_alt_mach_code (bfd *abfd, int alternative) 1560 { 1561 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) 1562 { 1563 int code; 1564 1565 switch (alternative) 1566 { 1567 case 0: 1568 code = get_elf_backend_data (abfd)->elf_machine_code; 1569 break; 1570 1571 case 1: 1572 code = get_elf_backend_data (abfd)->elf_machine_alt1; 1573 if (code == 0) 1574 return FALSE; 1575 break; 1576 1577 case 2: 1578 code = get_elf_backend_data (abfd)->elf_machine_alt2; 1579 if (code == 0) 1580 return FALSE; 1581 break; 1582 1583 default: 1584 return FALSE; 1585 } 1586 1587 elf_elfheader (abfd)->e_machine = code; 1588 1589 return TRUE; 1590 } 1591 1592 return FALSE; 1593 } 1594 1595 /* 1596 CODE_FRAGMENT 1597 1598 .struct bfd_preserve 1599 .{ 1600 . void *marker; 1601 . void *tdata; 1602 . flagword flags; 1603 . const struct bfd_arch_info *arch_info; 1604 . struct bfd_section *sections; 1605 . struct bfd_section *section_last; 1606 . unsigned int section_count; 1607 . struct bfd_hash_table section_htab; 1608 .}; 1609 . 1610 */ 1611 1612 /* 1613 FUNCTION 1614 bfd_preserve_save 1615 1616 SYNOPSIS 1617 bfd_boolean bfd_preserve_save (bfd *, struct bfd_preserve *); 1618 1619 DESCRIPTION 1620 When testing an object for compatibility with a particular 1621 target back-end, the back-end object_p function needs to set 1622 up certain fields in the bfd on successfully recognizing the 1623 object. This typically happens in a piecemeal fashion, with 1624 failures possible at many points. On failure, the bfd is 1625 supposed to be restored to its initial state, which is 1626 virtually impossible. However, restoring a subset of the bfd 1627 state works in practice. This function stores the subset and 1628 reinitializes the bfd. 1629 1630 */ 1631 1632 bfd_boolean 1633 bfd_preserve_save (bfd *abfd, struct bfd_preserve *preserve) 1634 { 1635 preserve->tdata = abfd->tdata.any; 1636 preserve->arch_info = abfd->arch_info; 1637 preserve->flags = abfd->flags; 1638 preserve->sections = abfd->sections; 1639 preserve->section_last = abfd->section_last; 1640 preserve->section_count = abfd->section_count; 1641 preserve->section_htab = abfd->section_htab; 1642 1643 if (! bfd_hash_table_init (&abfd->section_htab, bfd_section_hash_newfunc, 1644 sizeof (struct section_hash_entry))) 1645 return FALSE; 1646 1647 abfd->tdata.any = NULL; 1648 abfd->arch_info = &bfd_default_arch_struct; 1649 abfd->flags &= BFD_FLAGS_SAVED; 1650 abfd->sections = NULL; 1651 abfd->section_last = NULL; 1652 abfd->section_count = 0; 1653 1654 return TRUE; 1655 } 1656 1657 /* 1658 FUNCTION 1659 bfd_preserve_restore 1660 1661 SYNOPSIS 1662 void bfd_preserve_restore (bfd *, struct bfd_preserve *); 1663 1664 DESCRIPTION 1665 This function restores bfd state saved by bfd_preserve_save. 1666 If MARKER is non-NULL in struct bfd_preserve then that block 1667 and all subsequently bfd_alloc'd memory is freed. 1668 1669 */ 1670 1671 void 1672 bfd_preserve_restore (bfd *abfd, struct bfd_preserve *preserve) 1673 { 1674 bfd_hash_table_free (&abfd->section_htab); 1675 1676 abfd->tdata.any = preserve->tdata; 1677 abfd->arch_info = preserve->arch_info; 1678 abfd->flags = preserve->flags; 1679 abfd->section_htab = preserve->section_htab; 1680 abfd->sections = preserve->sections; 1681 abfd->section_last = preserve->section_last; 1682 abfd->section_count = preserve->section_count; 1683 1684 /* bfd_release frees all memory more recently bfd_alloc'd than 1685 its arg, as well as its arg. */ 1686 if (preserve->marker != NULL) 1687 { 1688 bfd_release (abfd, preserve->marker); 1689 preserve->marker = NULL; 1690 } 1691 } 1692 1693 /* 1694 FUNCTION 1695 bfd_preserve_finish 1696 1697 SYNOPSIS 1698 void bfd_preserve_finish (bfd *, struct bfd_preserve *); 1699 1700 DESCRIPTION 1701 This function should be called when the bfd state saved by 1702 bfd_preserve_save is no longer needed. ie. when the back-end 1703 object_p function returns with success. 1704 1705 */ 1706 1707 void 1708 bfd_preserve_finish (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_preserve *preserve) 1709 { 1710 /* It would be nice to be able to free more memory here, eg. old 1711 tdata, but that's not possible since these blocks are sitting 1712 inside bfd_alloc'd memory. The section hash is on a separate 1713 objalloc. */ 1714 bfd_hash_table_free (&preserve->section_htab); 1715 } 1716 1717 /* 1718 FUNCTION 1719 bfd_emul_get_maxpagesize 1720 1721 SYNOPSIS 1722 bfd_vma bfd_emul_get_maxpagesize (const char *); 1723 1724 DESCRIPTION 1725 Returns the maximum page size, in bytes, as determined by 1726 emulation. 1727 1728 RETURNS 1729 Returns the maximum page size in bytes for ELF, 0 otherwise. 1730 */ 1731 1732 bfd_vma 1733 bfd_emul_get_maxpagesize (const char *emul) 1734 { 1735 const bfd_target *target; 1736 1737 target = bfd_find_target (emul, NULL); 1738 if (target != NULL 1739 && target->flavour == bfd_target_elf_flavour) 1740 return xvec_get_elf_backend_data (target)->maxpagesize; 1741 1742 return 0; 1743 } 1744 1745 static void 1746 bfd_elf_set_pagesize (const bfd_target *target, bfd_vma size, 1747 int offset, const bfd_target *orig_target) 1748 { 1749 if (target->flavour == bfd_target_elf_flavour) 1750 { 1751 const struct elf_backend_data *bed; 1752 1753 bed = xvec_get_elf_backend_data (target); 1754 *((bfd_vma *) ((char *) bed + offset)) = size; 1755 } 1756 1757 if (target->alternative_target 1758 && target->alternative_target != orig_target) 1759 bfd_elf_set_pagesize (target->alternative_target, size, offset, 1760 orig_target); 1761 } 1762 1763 /* 1764 FUNCTION 1765 bfd_emul_set_maxpagesize 1766 1767 SYNOPSIS 1768 void bfd_emul_set_maxpagesize (const char *, bfd_vma); 1769 1770 DESCRIPTION 1771 For ELF, set the maximum page size for the emulation. It is 1772 a no-op for other formats. 1773 1774 */ 1775 1776 void 1777 bfd_emul_set_maxpagesize (const char *emul, bfd_vma size) 1778 { 1779 const bfd_target *target; 1780 1781 target = bfd_find_target (emul, NULL); 1782 if (target) 1783 bfd_elf_set_pagesize (target, size, 1784 offsetof (struct elf_backend_data, 1785 maxpagesize), target); 1786 } 1787 1788 /* 1789 FUNCTION 1790 bfd_emul_get_commonpagesize 1791 1792 SYNOPSIS 1793 bfd_vma bfd_emul_get_commonpagesize (const char *); 1794 1795 DESCRIPTION 1796 Returns the common page size, in bytes, as determined by 1797 emulation. 1798 1799 RETURNS 1800 Returns the common page size in bytes for ELF, 0 otherwise. 1801 */ 1802 1803 bfd_vma 1804 bfd_emul_get_commonpagesize (const char *emul) 1805 { 1806 const bfd_target *target; 1807 1808 target = bfd_find_target (emul, NULL); 1809 if (target != NULL 1810 && target->flavour == bfd_target_elf_flavour) 1811 return xvec_get_elf_backend_data (target)->commonpagesize; 1812 1813 return 0; 1814 } 1815 1816 /* 1817 FUNCTION 1818 bfd_emul_set_commonpagesize 1819 1820 SYNOPSIS 1821 void bfd_emul_set_commonpagesize (const char *, bfd_vma); 1822 1823 DESCRIPTION 1824 For ELF, set the common page size for the emulation. It is 1825 a no-op for other formats. 1826 1827 */ 1828 1829 void 1830 bfd_emul_set_commonpagesize (const char *emul, bfd_vma size) 1831 { 1832 const bfd_target *target; 1833 1834 target = bfd_find_target (emul, NULL); 1835 if (target) 1836 bfd_elf_set_pagesize (target, size, 1837 offsetof (struct elf_backend_data, 1838 commonpagesize), target); 1839 } 1840 1841 /* 1842 FUNCTION 1843 bfd_demangle 1844 1845 SYNOPSIS 1846 char *bfd_demangle (bfd *, const char *, int); 1847 1848 DESCRIPTION 1849 Wrapper around cplus_demangle. Strips leading underscores and 1850 other such chars that would otherwise confuse the demangler. 1851 If passed a g++ v3 ABI mangled name, returns a buffer allocated 1852 with malloc holding the demangled name. Returns NULL otherwise 1853 and on memory alloc failure. 1854 */ 1855 1856 char * 1857 bfd_demangle (bfd *abfd, const char *name, int options) 1858 { 1859 char *res, *alloc; 1860 const char *pre, *suf; 1861 size_t pre_len; 1862 bfd_boolean skip_lead; 1863 1864 skip_lead = (abfd != NULL 1865 && *name != '\0' 1866 && bfd_get_symbol_leading_char (abfd) == *name); 1867 if (skip_lead) 1868 ++name; 1869 1870 /* This is a hack for better error reporting on XCOFF, PowerPC64-ELF 1871 or the MS PE format. These formats have a number of leading '.'s 1872 on at least some symbols, so we remove all dots to avoid 1873 confusing the demangler. */ 1874 pre = name; 1875 while (*name == '.' || *name == '$') 1876 ++name; 1877 pre_len = name - pre; 1878 1879 /* Strip off @plt and suchlike too. */ 1880 alloc = NULL; 1881 suf = strchr (name, '@'); 1882 if (suf != NULL) 1883 { 1884 alloc = (char *) bfd_malloc (suf - name + 1); 1885 if (alloc == NULL) 1886 return NULL; 1887 memcpy (alloc, name, suf - name); 1888 alloc[suf - name] = '\0'; 1889 name = alloc; 1890 } 1891 1892 res = cplus_demangle (name, options); 1893 1894 if (alloc != NULL) 1895 free (alloc); 1896 1897 if (res == NULL) 1898 { 1899 if (skip_lead) 1900 { 1901 size_t len = strlen (pre) + 1; 1902 alloc = (char *) bfd_malloc (len); 1903 if (alloc == NULL) 1904 return NULL; 1905 memcpy (alloc, pre, len); 1906 return alloc; 1907 } 1908 return NULL; 1909 } 1910 1911 /* Put back any prefix or suffix. */ 1912 if (pre_len != 0 || suf != NULL) 1913 { 1914 size_t len; 1915 size_t suf_len; 1916 char *final; 1917 1918 len = strlen (res); 1919 if (suf == NULL) 1920 suf = res + len; 1921 suf_len = strlen (suf) + 1; 1922 final = (char *) bfd_malloc (pre_len + len + suf_len); 1923 if (final != NULL) 1924 { 1925 memcpy (final, pre, pre_len); 1926 memcpy (final + pre_len, res, len); 1927 memcpy (final + pre_len + len, suf, suf_len); 1928 } 1929 free (res); 1930 res = final; 1931 } 1932 1933 return res; 1934 } 1935