bfd/bfd.c

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