bfd.c revision 38889
1260684Skaiw/* Generic BFD library interface and support routines. 2260684Skaiw Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 1998 3260684Skaiw Free Software Foundation, Inc. 4260684Skaiw Written by Cygnus Support. 5260684Skaiw 6260684SkaiwThis file is part of BFD, the Binary File Descriptor library. 7260684Skaiw 8260684SkaiwThis program is free software; you can redistribute it and/or modify 9260684Skaiwit under the terms of the GNU General Public License as published by 10260684Skaiwthe Free Software Foundation; either version 2 of the License, or 11260684Skaiw(at your option) any later version. 12260684Skaiw 13260684SkaiwThis program is distributed in the hope that it will be useful, 14260684Skaiwbut WITHOUT ANY WARRANTY; without even the implied warranty of 15260684SkaiwMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16260684SkaiwGNU General Public License for more details. 17260684Skaiw 18260684SkaiwYou should have received a copy of the GNU General Public License 19260684Skaiwalong with this program; if not, write to the Free Software 20260684SkaiwFoundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 21260684Skaiw 22260684Skaiw/* 23260684SkaiwSECTION 24260684Skaiw <<typedef bfd>> 25260684Skaiw 26260684Skaiw A BFD has type <<bfd>>; objects of this type are the 27260684Skaiw cornerstone of any application using BFD. Using BFD 28260684Skaiw consists of making references though the BFD and to data in the BFD. 29260684Skaiw 30260684Skaiw Here is the structure that defines the type <<bfd>>. It 31260684Skaiw contains the major data about the file and pointers 32260684Skaiw to the rest of the data. 33260684Skaiw 34260684SkaiwCODE_FRAGMENT 35260684Skaiw. 36320685Semaste.struct _bfd 37260684Skaiw.{ 38260684Skaiw. {* The filename the application opened the BFD with. *} 39260684Skaiw. CONST char *filename; 40260684Skaiw. 41260684Skaiw. {* A pointer to the target jump table. *} 42260684Skaiw. const struct bfd_target *xvec; 43260684Skaiw. 44260684Skaiw. {* To avoid dragging too many header files into every file that 45260684Skaiw. includes `<<bfd.h>>', IOSTREAM has been declared as a "char 46260684Skaiw. *", and MTIME as a "long". Their correct types, to which they 47260684Skaiw. are cast when used, are "FILE *" and "time_t". The iostream 48260684Skaiw. is the result of an fopen on the filename. However, if the 49260684Skaiw. BFD_IN_MEMORY flag is set, then iostream is actually a pointer 50260684Skaiw. to a bfd_in_memory struct. *} 51260684Skaiw. PTR iostream; 52260684Skaiw. 53260684Skaiw. {* Is the file descriptor being cached? That is, can it be closed as 54260684Skaiw. needed, and re-opened when accessed later? *} 55260684Skaiw. 56260684Skaiw. boolean cacheable; 57260684Skaiw. 58260684Skaiw. {* Marks whether there was a default target specified when the 59260684Skaiw. BFD was opened. This is used to select which matching algorithm 60260684Skaiw. to use to choose the back end. *} 61260684Skaiw. 62260684Skaiw. boolean target_defaulted; 63260684Skaiw. 64260684Skaiw. {* The caching routines use these to maintain a 65260684Skaiw. least-recently-used list of BFDs *} 66260684Skaiw. 67260684Skaiw. struct _bfd *lru_prev, *lru_next; 68260684Skaiw. 69260684Skaiw. {* When a file is closed by the caching routines, BFD retains 70260684Skaiw. state information on the file here: *} 71260684Skaiw. 72260684Skaiw. file_ptr where; 73260684Skaiw. 74260684Skaiw. {* and here: (``once'' means at least once) *} 75260684Skaiw. 76260684Skaiw. boolean opened_once; 77260684Skaiw. 78260684Skaiw. {* Set if we have a locally maintained mtime value, rather than 79260684Skaiw. getting it from the file each time: *} 80260684Skaiw. 81260684Skaiw. boolean mtime_set; 82260684Skaiw. 83260684Skaiw. {* File modified time, if mtime_set is true: *} 84260684Skaiw. 85260684Skaiw. long mtime; 86260684Skaiw. 87260684Skaiw. {* Reserved for an unimplemented file locking extension.*} 88260684Skaiw. 89260684Skaiw. int ifd; 90260684Skaiw. 91260684Skaiw. {* The format which belongs to the BFD. (object, core, etc.) *} 92260684Skaiw. 93260684Skaiw. bfd_format format; 94260684Skaiw. 95260684Skaiw. {* The direction the BFD was opened with*} 96260684Skaiw. 97260684Skaiw. enum bfd_direction {no_direction = 0, 98260684Skaiw. read_direction = 1, 99260684Skaiw. write_direction = 2, 100260684Skaiw. both_direction = 3} direction; 101260684Skaiw. 102260684Skaiw. {* Format_specific flags*} 103260684Skaiw. 104260684Skaiw. flagword flags; 105260684Skaiw. 106260684Skaiw. {* Currently my_archive is tested before adding origin to 107260684Skaiw. anything. I believe that this can become always an add of 108260684Skaiw. origin, with origin set to 0 for non archive files. *} 109260684Skaiw. 110260684Skaiw. file_ptr origin; 111260684Skaiw. 112260684Skaiw. {* Remember when output has begun, to stop strange things 113260684Skaiw. from happening. *} 114260684Skaiw. boolean output_has_begun; 115260684Skaiw. 116260684Skaiw. {* Pointer to linked list of sections*} 117260684Skaiw. struct sec *sections; 118260684Skaiw. 119260684Skaiw. {* The number of sections *} 120260684Skaiw. unsigned int section_count; 121260684Skaiw. 122260684Skaiw. {* Stuff only useful for object files: 123260684Skaiw. The start address. *} 124260684Skaiw. bfd_vma start_address; 125260684Skaiw. 126260684Skaiw. {* Used for input and output*} 127260684Skaiw. unsigned int symcount; 128260684Skaiw. 129260684Skaiw. {* Symbol table for output BFD (with symcount entries) *} 130260684Skaiw. struct symbol_cache_entry **outsymbols; 131260684Skaiw. 132260684Skaiw. {* Pointer to structure which contains architecture information*} 133260684Skaiw. const struct bfd_arch_info *arch_info; 134260684Skaiw. 135260684Skaiw. {* Stuff only useful for archives:*} 136260684Skaiw. PTR arelt_data; 137260684Skaiw. struct _bfd *my_archive; {* The containing archive BFD. *} 138260684Skaiw. struct _bfd *next; {* The next BFD in the archive. *} 139260684Skaiw. struct _bfd *archive_head; {* The first BFD in the archive. *} 140260684Skaiw. boolean has_armap; 141260684Skaiw. 142260684Skaiw. {* A chain of BFD structures involved in a link. *} 143260684Skaiw. struct _bfd *link_next; 144260684Skaiw. 145260684Skaiw. {* A field used by _bfd_generic_link_add_archive_symbols. This will 146260684Skaiw. be used only for archive elements. *} 147260684Skaiw. int archive_pass; 148260684Skaiw. 149260684Skaiw. {* Used by the back end to hold private data. *} 150260684Skaiw. 151260684Skaiw. union 152260684Skaiw. { 153260684Skaiw. struct aout_data_struct *aout_data; 154260684Skaiw. struct artdata *aout_ar_data; 155367466Sdim. struct _oasys_data *oasys_obj_data; 156260684Skaiw. struct _oasys_ar_data *oasys_ar_data; 157260684Skaiw. struct coff_tdata *coff_obj_data; 158260684Skaiw. struct pe_tdata *pe_obj_data; 159260684Skaiw. struct xcoff_tdata *xcoff_obj_data; 160260684Skaiw. struct ecoff_tdata *ecoff_obj_data; 161260684Skaiw. struct ieee_data_struct *ieee_data; 162260684Skaiw. struct ieee_ar_data_struct *ieee_ar_data; 163260684Skaiw. struct srec_data_struct *srec_data; 164260684Skaiw. struct ihex_data_struct *ihex_data; 165260684Skaiw. struct tekhex_data_struct *tekhex_data; 166260684Skaiw. struct elf_obj_tdata *elf_obj_data; 167260684Skaiw. struct nlm_obj_tdata *nlm_obj_data; 168260684Skaiw. struct bout_data_struct *bout_data; 169260684Skaiw. struct sun_core_struct *sun_core_data; 170260684Skaiw. struct trad_core_struct *trad_core_data; 171260684Skaiw. struct som_data_struct *som_data; 172260684Skaiw. struct hpux_core_struct *hpux_core_data; 173260684Skaiw. struct hppabsd_core_struct *hppabsd_core_data; 174260684Skaiw. struct sgi_core_struct *sgi_core_data; 175260684Skaiw. struct lynx_core_struct *lynx_core_data; 176260684Skaiw. struct osf_core_struct *osf_core_data; 177260684Skaiw. struct cisco_core_struct *cisco_core_data; 178260684Skaiw. struct versados_data_struct *versados_data; 179260684Skaiw. struct netbsd_core_struct *netbsd_core_data; 180260684Skaiw. PTR any; 181260684Skaiw. } tdata; 182260684Skaiw. 183260684Skaiw. {* Used by the application to hold private data*} 184260684Skaiw. PTR usrdata; 185260684Skaiw. 186260684Skaiw. {* Where all the allocated stuff under this BFD goes. This is a 187260684Skaiw. struct objalloc *, but we use PTR to avoid requiring the inclusion of 188260684Skaiw. objalloc.h. *} 189260684Skaiw. PTR memory; 190260684Skaiw.}; 191260684Skaiw. 192260684Skaiw*/ 193260684Skaiw 194260684Skaiw#include "bfd.h" 195260684Skaiw#include "sysdep.h" 196260684Skaiw 197260684Skaiw#ifdef ANSI_PROTOTYPES 198260684Skaiw#include <stdarg.h> 199260684Skaiw#else 200260684Skaiw#include <varargs.h> 201260684Skaiw#endif 202260684Skaiw 203260684Skaiw#include "libiberty.h" 204260684Skaiw#include "bfdlink.h" 205260684Skaiw#include "libbfd.h" 206260684Skaiw#include "coff/internal.h" 207260684Skaiw#include "coff/sym.h" 208260684Skaiw#include "libcoff.h" 209260684Skaiw#include "libecoff.h" 210260684Skaiw#undef obj_symbols 211260684Skaiw#include "elf-bfd.h" 212260684Skaiw 213260684Skaiw#include <ctype.h> 214260684Skaiw 215260684Skaiw/* provide storage for subsystem, stack and heap data which may have been 216260684Skaiw passed in on the command line. Ld puts this data into a bfd_link_info 217260684Skaiw struct which ultimately gets passed in to the bfd. When it arrives, copy 218260684Skaiw it to the following struct so that the data will be available in coffcode.h 219260684Skaiw where it is needed. The typedef's used are defined in bfd.h */ 220260684Skaiw 221260684Skaiw 222260684Skaiw 223260684Skaiw/* 224260684SkaiwSECTION 225260684Skaiw Error reporting 226260684Skaiw 227260684Skaiw Most BFD functions return nonzero on success (check their 228260684Skaiw individual documentation for precise semantics). On an error, 229260684Skaiw they call <<bfd_set_error>> to set an error condition that callers 230260684Skaiw can check by calling <<bfd_get_error>>. 231260684Skaiw If that returns <<bfd_error_system_call>>, then check 232260684Skaiw <<errno>>. 233260684Skaiw 234260684Skaiw The easiest way to report a BFD error to the user is to 235260684Skaiw use <<bfd_perror>>. 236260684Skaiw 237260684SkaiwSUBSECTION 238260684Skaiw Type <<bfd_error_type>> 239260684Skaiw 240260684Skaiw The values returned by <<bfd_get_error>> are defined by the 241260684Skaiw enumerated type <<bfd_error_type>>. 242260684Skaiw 243260684SkaiwCODE_FRAGMENT 244260684Skaiw. 245260684Skaiw.typedef enum bfd_error 246260684Skaiw.{ 247260684Skaiw. bfd_error_no_error = 0, 248260684Skaiw. bfd_error_system_call, 249260684Skaiw. bfd_error_invalid_target, 250260684Skaiw. bfd_error_wrong_format, 251260684Skaiw. bfd_error_invalid_operation, 252260684Skaiw. bfd_error_no_memory, 253260684Skaiw. bfd_error_no_symbols, 254260684Skaiw. bfd_error_no_armap, 255260684Skaiw. bfd_error_no_more_archived_files, 256367466Sdim. bfd_error_malformed_archive, 257260684Skaiw. bfd_error_file_not_recognized, 258260684Skaiw. bfd_error_file_ambiguously_recognized, 259260684Skaiw. bfd_error_no_contents, 260260684Skaiw. bfd_error_nonrepresentable_section, 261260684Skaiw. bfd_error_no_debug_section, 262260684Skaiw. bfd_error_bad_value, 263260684Skaiw. bfd_error_file_truncated, 264260684Skaiw. bfd_error_file_too_big, 265260684Skaiw. bfd_error_invalid_error_code 266260684Skaiw.} bfd_error_type; 267260684Skaiw. 268260684Skaiw*/ 269260684Skaiw 270260684Skaiwstatic bfd_error_type bfd_error = bfd_error_no_error; 271260684Skaiw 272260684SkaiwCONST char *CONST bfd_errmsgs[] = { 273260684Skaiw "No error", 274260684Skaiw "System call error", 275260684Skaiw "Invalid bfd target", 276260684Skaiw "File in wrong format", 277260684Skaiw "Invalid operation", 278260684Skaiw "Memory exhausted", 279260684Skaiw "No symbols", 280260684Skaiw "Archive has no index; run ranlib to add one", 281260684Skaiw "No more archived files", 282260684Skaiw "Malformed archive", 283260684Skaiw "File format not recognized", 284320685Semaste "File format is ambiguous", 285320685Semaste "Section has no contents", 286320685Semaste "Nonrepresentable section on output", 287320685Semaste "Symbol needs debug section which does not exist", 288320685Semaste "Bad value", 289320685Semaste "File truncated", 290320685Semaste "File too big", 291320685Semaste "#<Invalid error code>" 292320685Semaste }; 293320685Semaste 294320685Semaste/* 295320685SemasteFUNCTION 296367466Sdim bfd_get_error 297320685Semaste 298320685SemasteSYNOPSIS 299320685Semaste bfd_error_type bfd_get_error (void); 300320685Semaste 301320685SemasteDESCRIPTION 302320685Semaste Return the current BFD error condition. 303320685Semaste*/ 304320685Semaste 305320685Semastebfd_error_type 306320685Semastebfd_get_error () 307320685Semaste{ 308320685Semaste return bfd_error; 309320685Semaste} 310320685Semaste 311320685Semaste/* 312320685SemasteFUNCTION 313320685Semaste bfd_set_error 314320685Semaste 315320685SemasteSYNOPSIS 316320685Semaste void bfd_set_error (bfd_error_type error_tag); 317320685Semaste 318320685SemasteDESCRIPTION 319320685Semaste Set the BFD error condition to be @var{error_tag}. 320320685Semaste*/ 321320685Semaste 322320685Semastevoid 323320685Semastebfd_set_error (error_tag) 324320685Semaste bfd_error_type error_tag; 325260684Skaiw{ 326260684Skaiw bfd_error = error_tag; 327260684Skaiw} 328260684Skaiw 329260684Skaiw/* 330260684SkaiwFUNCTION 331260684Skaiw bfd_errmsg 332260684Skaiw 333260684SkaiwSYNOPSIS 334260684Skaiw CONST char *bfd_errmsg (bfd_error_type error_tag); 335260684Skaiw 336260684SkaiwDESCRIPTION 337260684Skaiw Return a string describing the error @var{error_tag}, or 338260684Skaiw the system error if @var{error_tag} is <<bfd_error_system_call>>. 339260684Skaiw*/ 340260684Skaiw 341260684SkaiwCONST char * 342260684Skaiwbfd_errmsg (error_tag) 343260684Skaiw bfd_error_type error_tag; 344260684Skaiw{ 345260684Skaiw#ifndef errno 346260684Skaiw extern int errno; 347260684Skaiw#endif 348260684Skaiw if (error_tag == bfd_error_system_call) 349260684Skaiw return xstrerror (errno); 350260684Skaiw 351260684Skaiw if ((((int)error_tag <(int) bfd_error_no_error) || 352260684Skaiw ((int)error_tag > (int)bfd_error_invalid_error_code))) 353260684Skaiw error_tag = bfd_error_invalid_error_code;/* sanity check */ 354260684Skaiw 355260684Skaiw return bfd_errmsgs [(int)error_tag]; 356260684Skaiw} 357260684Skaiw 358260684Skaiw/* 359260684SkaiwFUNCTION 360 bfd_perror 361 362SYNOPSIS 363 void bfd_perror (CONST char *message); 364 365DESCRIPTION 366 Print to the standard error stream a string describing the 367 last BFD error that occurred, or the last system error if 368 the last BFD error was a system call failure. If @var{message} 369 is non-NULL and non-empty, the error string printed is preceded 370 by @var{message}, a colon, and a space. It is followed by a newline. 371*/ 372 373void 374bfd_perror (message) 375 CONST char *message; 376{ 377 if (bfd_get_error () == bfd_error_system_call) 378 perror((char *)message); /* must be system error then... */ 379 else { 380 if (message == NULL || *message == '\0') 381 fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ())); 382 else 383 fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ())); 384 } 385} 386 387/* 388SUBSECTION 389 BFD error handler 390 391 Some BFD functions want to print messages describing the 392 problem. They call a BFD error handler function. This 393 function may be overriden by the program. 394 395 The BFD error handler acts like printf. 396 397CODE_FRAGMENT 398. 399.typedef void (*bfd_error_handler_type) PARAMS ((const char *, ...)); 400. 401*/ 402 403/* The program name used when printing BFD error messages. */ 404 405static const char *_bfd_error_program_name; 406 407/* This is the default routine to handle BFD error messages. */ 408 409#ifdef ANSI_PROTOTYPES 410 411static void _bfd_default_error_handler PARAMS ((const char *s, ...)); 412 413static void 414_bfd_default_error_handler (const char *s, ...) 415{ 416 va_list p; 417 418 if (_bfd_error_program_name != NULL) 419 fprintf (stderr, "%s: ", _bfd_error_program_name); 420 else 421 fprintf (stderr, "BFD: "); 422 423 va_start (p, s); 424 425 vfprintf (stderr, s, p); 426 427 va_end (p); 428 429 fprintf (stderr, "\n"); 430} 431 432#else /* ! defined (ANSI_PROTOTYPES) */ 433 434static void _bfd_default_error_handler (); 435 436static void 437_bfd_default_error_handler (va_alist) 438 va_dcl 439{ 440 va_list p; 441 const char *s; 442 443 if (_bfd_error_program_name != NULL) 444 fprintf (stderr, "%s: ", _bfd_error_program_name); 445 else 446 fprintf (stderr, "BFD: "); 447 448 va_start (p); 449 450 s = va_arg (p, const char *); 451 vfprintf (stderr, s, p); 452 453 va_end (p); 454 455 fprintf (stderr, "\n"); 456} 457 458#endif /* ! defined (ANSI_PROTOTYPES) */ 459 460/* This is a function pointer to the routine which should handle BFD 461 error messages. It is called when a BFD routine encounters an 462 error for which it wants to print a message. Going through a 463 function pointer permits a program linked against BFD to intercept 464 the messages and deal with them itself. */ 465 466bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler; 467 468/* 469FUNCTION 470 bfd_set_error_handler 471 472SYNOPSIS 473 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type); 474 475DESCRIPTION 476 Set the BFD error handler function. Returns the previous 477 function. 478*/ 479 480bfd_error_handler_type 481bfd_set_error_handler (pnew) 482 bfd_error_handler_type pnew; 483{ 484 bfd_error_handler_type pold; 485 486 pold = _bfd_error_handler; 487 _bfd_error_handler = pnew; 488 return pold; 489} 490 491/* 492FUNCTION 493 bfd_set_error_program_name 494 495SYNOPSIS 496 void bfd_set_error_program_name (const char *); 497 498DESCRIPTION 499 Set the program name to use when printing a BFD error. This 500 is printed before the error message followed by a colon and 501 space. The string must not be changed after it is passed to 502 this function. 503*/ 504 505void 506bfd_set_error_program_name (name) 507 const char *name; 508{ 509 _bfd_error_program_name = name; 510} 511 512 513/* 514FUNCTION 515 bfd_get_error_handler 516 517SYNOPSIS 518 bfd_error_handler_type bfd_get_error_handler (void); 519 520DESCRIPTION 521 Return the BFD error handler function. 522*/ 523 524bfd_error_handler_type 525bfd_get_error_handler () 526{ 527 return _bfd_error_handler; 528} 529 530/* 531SECTION 532 Symbols 533*/ 534 535/* 536FUNCTION 537 bfd_get_reloc_upper_bound 538 539SYNOPSIS 540 long bfd_get_reloc_upper_bound(bfd *abfd, asection *sect); 541 542DESCRIPTION 543 Return the number of bytes required to store the 544 relocation information associated with section @var{sect} 545 attached to bfd @var{abfd}. If an error occurs, return -1. 546 547*/ 548 549 550long 551bfd_get_reloc_upper_bound (abfd, asect) 552 bfd *abfd; 553 sec_ptr asect; 554{ 555 if (abfd->format != bfd_object) { 556 bfd_set_error (bfd_error_invalid_operation); 557 return -1; 558 } 559 560 return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect)); 561} 562 563/* 564FUNCTION 565 bfd_canonicalize_reloc 566 567SYNOPSIS 568 long bfd_canonicalize_reloc 569 (bfd *abfd, 570 asection *sec, 571 arelent **loc, 572 asymbol **syms); 573 574DESCRIPTION 575 Call the back end associated with the open BFD 576 @var{abfd} and translate the external form of the relocation 577 information attached to @var{sec} into the internal canonical 578 form. Place the table into memory at @var{loc}, which has 579 been preallocated, usually by a call to 580 <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or 581 -1 on error. 582 583 The @var{syms} table is also needed for horrible internal magic 584 reasons. 585 586 587*/ 588long 589bfd_canonicalize_reloc (abfd, asect, location, symbols) 590 bfd *abfd; 591 sec_ptr asect; 592 arelent **location; 593 asymbol **symbols; 594{ 595 if (abfd->format != bfd_object) { 596 bfd_set_error (bfd_error_invalid_operation); 597 return -1; 598 } 599 return BFD_SEND (abfd, _bfd_canonicalize_reloc, 600 (abfd, asect, location, symbols)); 601} 602 603/* 604FUNCTION 605 bfd_set_reloc 606 607SYNOPSIS 608 void bfd_set_reloc 609 (bfd *abfd, asection *sec, arelent **rel, unsigned int count) 610 611DESCRIPTION 612 Set the relocation pointer and count within 613 section @var{sec} to the values @var{rel} and @var{count}. 614 The argument @var{abfd} is ignored. 615 616*/ 617/*ARGSUSED*/ 618void 619bfd_set_reloc (ignore_abfd, asect, location, count) 620 bfd *ignore_abfd; 621 sec_ptr asect; 622 arelent **location; 623 unsigned int count; 624{ 625 asect->orelocation = location; 626 asect->reloc_count = count; 627} 628 629/* 630FUNCTION 631 bfd_set_file_flags 632 633SYNOPSIS 634 boolean bfd_set_file_flags(bfd *abfd, flagword flags); 635 636DESCRIPTION 637 Set the flag word in the BFD @var{abfd} to the value @var{flags}. 638 639 Possible errors are: 640 o <<bfd_error_wrong_format>> - The target bfd was not of object format. 641 o <<bfd_error_invalid_operation>> - The target bfd was open for reading. 642 o <<bfd_error_invalid_operation>> - 643 The flag word contained a bit which was not applicable to the 644 type of file. E.g., an attempt was made to set the <<D_PAGED>> bit 645 on a BFD format which does not support demand paging. 646 647*/ 648 649boolean 650bfd_set_file_flags (abfd, flags) 651 bfd *abfd; 652 flagword flags; 653{ 654 if (abfd->format != bfd_object) { 655 bfd_set_error (bfd_error_wrong_format); 656 return false; 657 } 658 659 if (bfd_read_p (abfd)) { 660 bfd_set_error (bfd_error_invalid_operation); 661 return false; 662 } 663 664 bfd_get_file_flags (abfd) = flags; 665 if ((flags & bfd_applicable_file_flags (abfd)) != flags) { 666 bfd_set_error (bfd_error_invalid_operation); 667 return false; 668 } 669 670return true; 671} 672 673void 674bfd_assert (file, line) 675 const char *file; 676 int line; 677{ 678 (*_bfd_error_handler) ("bfd assertion fail %s:%d", file, line); 679} 680 681 682/* 683FUNCTION 684 bfd_set_start_address 685 686SYNOPSIS 687 boolean bfd_set_start_address(bfd *abfd, bfd_vma vma); 688 689DESCRIPTION 690 Make @var{vma} the entry point of output BFD @var{abfd}. 691 692RETURNS 693 Returns <<true>> on success, <<false>> otherwise. 694*/ 695 696boolean 697bfd_set_start_address(abfd, vma) 698bfd *abfd; 699bfd_vma vma; 700{ 701 abfd->start_address = vma; 702 return true; 703} 704 705 706/* 707FUNCTION 708 bfd_get_mtime 709 710SYNOPSIS 711 long bfd_get_mtime(bfd *abfd); 712 713DESCRIPTION 714 Return the file modification time (as read from the file system, or 715 from the archive header for archive members). 716 717*/ 718 719long 720bfd_get_mtime (abfd) 721 bfd *abfd; 722{ 723 FILE *fp; 724 struct stat buf; 725 726 if (abfd->mtime_set) 727 return abfd->mtime; 728 729 fp = bfd_cache_lookup (abfd); 730 if (0 != fstat (fileno (fp), &buf)) 731 return 0; 732 733 abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */ 734 return buf.st_mtime; 735} 736 737/* 738FUNCTION 739 bfd_get_size 740 741SYNOPSIS 742 long bfd_get_size(bfd *abfd); 743 744DESCRIPTION 745 Return the file size (as read from file system) for the file 746 associated with BFD @var{abfd}. 747 748 The initial motivation for, and use of, this routine is not 749 so we can get the exact size of the object the BFD applies to, since 750 that might not be generally possible (archive members for example). 751 It would be ideal if someone could eventually modify 752 it so that such results were guaranteed. 753 754 Instead, we want to ask questions like "is this NNN byte sized 755 object I'm about to try read from file offset YYY reasonable?" 756 As as example of where we might do this, some object formats 757 use string tables for which the first <<sizeof(long)>> bytes of the 758 table contain the size of the table itself, including the size bytes. 759 If an application tries to read what it thinks is one of these 760 string tables, without some way to validate the size, and for 761 some reason the size is wrong (byte swapping error, wrong location 762 for the string table, etc.), the only clue is likely to be a read 763 error when it tries to read the table, or a "virtual memory 764 exhausted" error when it tries to allocate 15 bazillon bytes 765 of space for the 15 bazillon byte table it is about to read. 766 This function at least allows us to answer the quesion, "is the 767 size reasonable?". 768*/ 769 770long 771bfd_get_size (abfd) 772 bfd *abfd; 773{ 774 FILE *fp; 775 struct stat buf; 776 777 if ((abfd->flags & BFD_IN_MEMORY) != 0) 778 return ((struct bfd_in_memory *) abfd->iostream)->size; 779 780 fp = bfd_cache_lookup (abfd); 781 if (0 != fstat (fileno (fp), &buf)) 782 return 0; 783 784 return buf.st_size; 785} 786 787/* 788FUNCTION 789 bfd_get_gp_size 790 791SYNOPSIS 792 int bfd_get_gp_size(bfd *abfd); 793 794DESCRIPTION 795 Return the maximum size of objects to be optimized using the GP 796 register under MIPS ECOFF. This is typically set by the <<-G>> 797 argument to the compiler, assembler or linker. 798*/ 799 800int 801bfd_get_gp_size (abfd) 802 bfd *abfd; 803{ 804 if (abfd->format == bfd_object) 805 { 806 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 807 return ecoff_data (abfd)->gp_size; 808 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 809 return elf_gp_size (abfd); 810 } 811 return 0; 812} 813 814/* 815FUNCTION 816 bfd_set_gp_size 817 818SYNOPSIS 819 void bfd_set_gp_size(bfd *abfd, int i); 820 821DESCRIPTION 822 Set the maximum size of objects to be optimized using the GP 823 register under ECOFF or MIPS ELF. This is typically set by 824 the <<-G>> argument to the compiler, assembler or linker. 825*/ 826 827void 828bfd_set_gp_size (abfd, i) 829 bfd *abfd; 830 int i; 831{ 832 /* Don't try to set GP size on an archive or core file! */ 833 if (abfd->format != bfd_object) 834 return; 835 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 836 ecoff_data (abfd)->gp_size = i; 837 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 838 elf_gp_size (abfd) = i; 839} 840 841/* Get the GP value. This is an internal function used by some of the 842 relocation special_function routines on targets which support a GP 843 register. */ 844 845bfd_vma 846_bfd_get_gp_value (abfd) 847 bfd *abfd; 848{ 849 if (abfd->format == bfd_object) 850 { 851 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 852 return ecoff_data (abfd)->gp; 853 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 854 return elf_gp (abfd); 855 } 856 return 0; 857} 858 859/* Set the GP value. */ 860 861void 862_bfd_set_gp_value (abfd, v) 863 bfd *abfd; 864 bfd_vma v; 865{ 866 if (abfd->format != bfd_object) 867 return; 868 if (abfd->xvec->flavour == bfd_target_ecoff_flavour) 869 ecoff_data (abfd)->gp = v; 870 else if (abfd->xvec->flavour == bfd_target_elf_flavour) 871 elf_gp (abfd) = v; 872} 873 874/* 875FUNCTION 876 bfd_scan_vma 877 878SYNOPSIS 879 bfd_vma bfd_scan_vma(CONST char *string, CONST char **end, int base); 880 881DESCRIPTION 882 Convert, like <<strtoul>>, a numerical expression 883 @var{string} into a <<bfd_vma>> integer, and return that integer. 884 (Though without as many bells and whistles as <<strtoul>>.) 885 The expression is assumed to be unsigned (i.e., positive). 886 If given a @var{base}, it is used as the base for conversion. 887 A base of 0 causes the function to interpret the string 888 in hex if a leading "0x" or "0X" is found, otherwise 889 in octal if a leading zero is found, otherwise in decimal. 890 891 Overflow is not detected. 892*/ 893 894bfd_vma 895bfd_scan_vma (string, end, base) 896 CONST char *string; 897 CONST char **end; 898 int base; 899{ 900 bfd_vma value; 901 int digit; 902 903 /* Let the host do it if possible. */ 904 if (sizeof(bfd_vma) <= sizeof(unsigned long)) 905 return (bfd_vma) strtoul (string, (char **) end, base); 906 907 /* A negative base makes no sense, and we only need to go as high as hex. */ 908 if ((base < 0) || (base > 16)) 909 return (bfd_vma) 0; 910 911 if (base == 0) 912 { 913 if (string[0] == '0') 914 { 915 if ((string[1] == 'x') || (string[1] == 'X')) 916 base = 16; 917 /* XXX should we also allow "0b" or "0B" to set base to 2? */ 918 else 919 base = 8; 920 } 921 else 922 base = 10; 923 } 924 if ((base == 16) && 925 (string[0] == '0') && ((string[1] == 'x') || (string[1] == 'X'))) 926 string += 2; 927 /* XXX should we also skip over "0b" or "0B" if base is 2? */ 928 929/* Speed could be improved with a table like hex_value[] in gas. */ 930#define HEX_VALUE(c) \ 931 (isxdigit ((unsigned char) c) \ 932 ? (isdigit ((unsigned char) c) \ 933 ? (c - '0') \ 934 : (10 + c - (islower ((unsigned char) c) ? 'a' : 'A'))) \ 935 : 42) 936 937 for (value = 0; (digit = HEX_VALUE(*string)) < base; string++) 938 { 939 value = value * base + digit; 940 } 941 942 if (end) 943 *end = string; 944 945 return value; 946} 947 948/* 949FUNCTION 950 bfd_copy_private_bfd_data 951 952SYNOPSIS 953 boolean bfd_copy_private_bfd_data(bfd *ibfd, bfd *obfd); 954 955DESCRIPTION 956 Copy private BFD information from the BFD @var{ibfd} to the 957 the BFD @var{obfd}. Return <<true>> on success, <<false>> on error. 958 Possible error returns are: 959 960 o <<bfd_error_no_memory>> - 961 Not enough memory exists to create private data for @var{obfd}. 962 963.#define bfd_copy_private_bfd_data(ibfd, obfd) \ 964. BFD_SEND (obfd, _bfd_copy_private_bfd_data, \ 965. (ibfd, obfd)) 966 967*/ 968 969/* 970FUNCTION 971 bfd_merge_private_bfd_data 972 973SYNOPSIS 974 boolean bfd_merge_private_bfd_data(bfd *ibfd, bfd *obfd); 975 976DESCRIPTION 977 Merge private BFD information from the BFD @var{ibfd} to the 978 the output file BFD @var{obfd} when linking. Return <<true>> 979 on success, <<false>> on error. Possible error returns are: 980 981 o <<bfd_error_no_memory>> - 982 Not enough memory exists to create private data for @var{obfd}. 983 984.#define bfd_merge_private_bfd_data(ibfd, obfd) \ 985. BFD_SEND (obfd, _bfd_merge_private_bfd_data, \ 986. (ibfd, obfd)) 987 988*/ 989 990/* 991FUNCTION 992 bfd_set_private_flags 993 994SYNOPSIS 995 boolean bfd_set_private_flags(bfd *abfd, flagword flags); 996 997DESCRIPTION 998 Set private BFD flag information in the BFD @var{abfd}. 999 Return <<true>> on success, <<false>> on error. Possible error 1000 returns are: 1001 1002 o <<bfd_error_no_memory>> - 1003 Not enough memory exists to create private data for @var{obfd}. 1004 1005.#define bfd_set_private_flags(abfd, flags) \ 1006. BFD_SEND (abfd, _bfd_set_private_flags, \ 1007. (abfd, flags)) 1008 1009*/ 1010 1011/* 1012FUNCTION 1013 stuff 1014 1015DESCRIPTION 1016 Stuff which should be documented: 1017 1018.#define bfd_sizeof_headers(abfd, reloc) \ 1019. BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc)) 1020. 1021.#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \ 1022. BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, sec, syms, off, file, func, line)) 1023. 1024. {* Do these three do anything useful at all, for any back end? *} 1025.#define bfd_debug_info_start(abfd) \ 1026. BFD_SEND (abfd, _bfd_debug_info_start, (abfd)) 1027. 1028.#define bfd_debug_info_end(abfd) \ 1029. BFD_SEND (abfd, _bfd_debug_info_end, (abfd)) 1030. 1031.#define bfd_debug_info_accumulate(abfd, section) \ 1032. BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section)) 1033. 1034. 1035.#define bfd_stat_arch_elt(abfd, stat) \ 1036. BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat)) 1037. 1038.#define bfd_update_armap_timestamp(abfd) \ 1039. BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd)) 1040. 1041.#define bfd_set_arch_mach(abfd, arch, mach)\ 1042. BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach)) 1043. 1044.#define bfd_relax_section(abfd, section, link_info, again) \ 1045. BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again)) 1046. 1047.#define bfd_link_hash_table_create(abfd) \ 1048. BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd)) 1049. 1050.#define bfd_link_add_symbols(abfd, info) \ 1051. BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info)) 1052. 1053.#define bfd_final_link(abfd, info) \ 1054. BFD_SEND (abfd, _bfd_final_link, (abfd, info)) 1055. 1056.#define bfd_free_cached_info(abfd) \ 1057. BFD_SEND (abfd, _bfd_free_cached_info, (abfd)) 1058. 1059.#define bfd_get_dynamic_symtab_upper_bound(abfd) \ 1060. BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd)) 1061. 1062.#define bfd_print_private_bfd_data(abfd, file)\ 1063. BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file)) 1064. 1065.#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \ 1066. BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols)) 1067. 1068.#define bfd_get_dynamic_reloc_upper_bound(abfd) \ 1069. BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd)) 1070. 1071.#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \ 1072. BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms)) 1073. 1074.extern bfd_byte *bfd_get_relocated_section_contents 1075. PARAMS ((bfd *, struct bfd_link_info *, 1076. struct bfd_link_order *, bfd_byte *, 1077. boolean, asymbol **)); 1078. 1079 1080*/ 1081 1082bfd_byte * 1083bfd_get_relocated_section_contents (abfd, link_info, link_order, data, 1084 relocateable, symbols) 1085 bfd *abfd; 1086 struct bfd_link_info *link_info; 1087 struct bfd_link_order *link_order; 1088 bfd_byte *data; 1089 boolean relocateable; 1090 asymbol **symbols; 1091{ 1092 bfd *abfd2; 1093 bfd_byte *(*fn) PARAMS ((bfd *, struct bfd_link_info *, 1094 struct bfd_link_order *, bfd_byte *, boolean, 1095 asymbol **)); 1096 1097 if (link_order->type == bfd_indirect_link_order) 1098 { 1099 abfd2 = link_order->u.indirect.section->owner; 1100 if (abfd2 == 0) 1101 abfd2 = abfd; 1102 } 1103 else 1104 abfd2 = abfd; 1105 fn = abfd2->xvec->_bfd_get_relocated_section_contents; 1106 1107 return (*fn) (abfd, link_info, link_order, data, relocateable, symbols); 1108} 1109 1110/* Record information about an ELF program header. */ 1111 1112boolean 1113bfd_record_phdr (abfd, type, flags_valid, flags, at_valid, at, 1114 includes_filehdr, includes_phdrs, count, secs) 1115 bfd *abfd; 1116 unsigned long type; 1117 boolean flags_valid; 1118 flagword flags; 1119 boolean at_valid; 1120 bfd_vma at; 1121 boolean includes_filehdr; 1122 boolean includes_phdrs; 1123 unsigned int count; 1124 asection **secs; 1125{ 1126 struct elf_segment_map *m, **pm; 1127 1128 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) 1129 return true; 1130 1131 m = ((struct elf_segment_map *) 1132 bfd_alloc (abfd, 1133 (sizeof (struct elf_segment_map) 1134 + ((size_t) count - 1) * sizeof (asection *)))); 1135 if (m == NULL) 1136 return false; 1137 1138 m->next = NULL; 1139 m->p_type = type; 1140 m->p_flags = flags; 1141 m->p_paddr = at; 1142 m->p_flags_valid = flags_valid; 1143 m->p_paddr_valid = at_valid; 1144 m->includes_filehdr = includes_filehdr; 1145 m->includes_phdrs = includes_phdrs; 1146 m->count = count; 1147 if (count > 0) 1148 memcpy (m->sections, secs, count * sizeof (asection *)); 1149 1150 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next) 1151 ; 1152 *pm = m; 1153 1154 return true; 1155} 1156