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
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
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.
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, MA 02110-1301, USA. */
27 A BFD has type <<bfd>>; objects of this type are the
28 cornerstone of any application using BFD. Using BFD
29 consists of making references though the BFD and to data in the BFD.
31 Here is the structure that defines the type <<bfd>>. It
32 contains the major data about the file and pointers
33 to the rest of the data.
39 . {* A unique identifier of the BFD *}
42 . {* The filename the application opened the BFD with. *}
43 . const char *filename;
45 . {* A pointer to the target jump table. *}
46 . const struct bfd_target *xvec;
48 . {* The IOSTREAM, and corresponding IO vector that provide access
49 . to the file backing the BFD. *}
51 . const struct bfd_iovec *iovec;
53 . {* Is the file descriptor being cached? That is, can it be closed as
54 . needed, and re-opened when accessed later? *}
55 . bfd_boolean cacheable;
57 . {* Marks whether there was a default target specified when the
58 . BFD was opened. This is used to select which matching algorithm
59 . to use to choose the back end. *}
60 . bfd_boolean target_defaulted;
62 . {* The caching routines use these to maintain a
63 . least-recently-used list of BFDs. *}
64 . struct bfd *lru_prev, *lru_next;
66 . {* When a file is closed by the caching routines, BFD retains
67 . state information on the file here... *}
70 . {* ... and here: (``once'' means at least once). *}
71 . bfd_boolean opened_once;
73 . {* Set if we have a locally maintained mtime value, rather than
74 . getting it from the file each time. *}
75 . bfd_boolean mtime_set;
77 . {* File modified time, if mtime_set is TRUE. *}
80 . {* Reserved for an unimplemented file locking extension. *}
83 . {* The format which belongs to the BFD. (object, core, etc.) *}
86 . {* The direction with which the BFD was opened. *}
91 . write_direction = 2,
96 . {* Format_specific flags. *}
99 . {* Currently my_archive is tested before adding origin to
100 . anything. I believe that this can become always an add of
101 . origin, with origin set to 0 for non archive files. *}
104 . {* Remember when output has begun, to stop strange things
106 . bfd_boolean output_has_begun;
108 . {* A hash table for section names. *}
109 . struct bfd_hash_table section_htab;
111 . {* Pointer to linked list of sections. *}
112 . struct bfd_section *sections;
114 . {* The last section on the section list. *}
115 . struct bfd_section *section_last;
117 . {* The number of sections. *}
118 . unsigned int section_count;
120 . {* Stuff only useful for object files:
121 . The start address. *}
122 . bfd_vma start_address;
124 . {* Used for input and output. *}
125 . unsigned int symcount;
127 . {* Symbol table for output BFD (with symcount entries). *}
128 . struct bfd_symbol **outsymbols;
130 . {* Used for slurped dynamic symbol tables. *}
131 . unsigned int dynsymcount;
133 . {* Pointer to structure which contains architecture information. *}
134 . const struct bfd_arch_info *arch_info;
136 . {* Flag set if symbols from this BFD should not be exported. *}
137 . bfd_boolean no_export;
139 . {* Stuff only useful for archives. *}
141 . struct bfd *my_archive; {* The containing archive BFD. *}
142 . struct bfd *next; {* The next BFD in the archive. *}
143 . struct bfd *archive_head; {* The first BFD in the archive. *}
144 . bfd_boolean has_armap;
146 . {* A chain of BFD structures involved in a link. *}
147 . struct bfd *link_next;
149 . {* A field used by _bfd_generic_link_add_archive_symbols. This will
150 . be used only for archive elements. *}
153 . {* Used by the back end to hold private data. *}
156 . struct aout_data_struct *aout_data;
157 . struct artdata *aout_ar_data;
158 . struct _oasys_data *oasys_obj_data;
159 . struct _oasys_ar_data *oasys_ar_data;
160 . struct coff_tdata *coff_obj_data;
161 . struct pe_tdata *pe_obj_data;
162 . struct xcoff_tdata *xcoff_obj_data;
163 . struct ecoff_tdata *ecoff_obj_data;
164 . struct ieee_data_struct *ieee_data;
165 . struct ieee_ar_data_struct *ieee_ar_data;
166 . struct srec_data_struct *srec_data;
167 . struct ihex_data_struct *ihex_data;
168 . struct tekhex_data_struct *tekhex_data;
169 . struct elf_obj_tdata *elf_obj_data;
170 . struct nlm_obj_tdata *nlm_obj_data;
171 . struct bout_data_struct *bout_data;
172 . struct mmo_data_struct *mmo_data;
173 . struct sun_core_struct *sun_core_data;
174 . struct sco5_core_struct *sco5_core_data;
175 . struct trad_core_struct *trad_core_data;
176 . struct som_data_struct *som_data;
177 . struct hpux_core_struct *hpux_core_data;
178 . struct hppabsd_core_struct *hppabsd_core_data;
179 . struct sgi_core_struct *sgi_core_data;
180 . struct lynx_core_struct *lynx_core_data;
181 . struct osf_core_struct *osf_core_data;
182 . struct cisco_core_struct *cisco_core_data;
183 . struct versados_data_struct *versados_data;
184 . struct netbsd_core_struct *netbsd_core_data;
185 . struct mach_o_data_struct *mach_o_data;
186 . struct mach_o_fat_data_struct *mach_o_fat_data;
187 . struct bfd_pef_data_struct *pef_data;
188 . struct bfd_pef_xlib_data_struct *pef_xlib_data;
189 . struct bfd_sym_data_struct *sym_data;
194 . {* Used by the application to hold private data. *}
197 . {* Where all the allocated stuff under this BFD goes. This is a
198 . struct objalloc *, but we use void * to avoid requiring the inclusion
209 #include "libiberty.h"
210 #include "safe-ctype.h"
213 #include "coff/internal.h"
214 #include "coff/sym.h"
216 #include "libecoff.h"
220 /* provide storage for subsystem, stack and heap data which may have been
221 passed in on the command line. Ld puts this data into a bfd_link_info
222 struct which ultimately gets passed in to the bfd. When it arrives, copy
223 it to the following struct so that the data will be available in coffcode.h
224 where it is needed. The typedef's used are defined in bfd.h */
230 Most BFD functions return nonzero on success (check their
231 individual documentation for precise semantics). On an error,
232 they call <<bfd_set_error>> to set an error condition that callers
233 can check by calling <<bfd_get_error>>.
234 If that returns <<bfd_error_system_call>>, then check
237 The easiest way to report a BFD error to the user is to
241 Type <<bfd_error_type>>
243 The values returned by <<bfd_get_error>> are defined by the
244 enumerated type <<bfd_error_type>>.
248 .typedef enum bfd_error
250 . bfd_error_no_error = 0,
251 . bfd_error_system_call,
252 . bfd_error_invalid_target,
253 . bfd_error_wrong_format,
254 . bfd_error_wrong_object_format,
255 . bfd_error_invalid_operation,
256 . bfd_error_no_memory,
257 . bfd_error_no_symbols,
258 . bfd_error_no_armap,
259 . bfd_error_no_more_archived_files,
260 . bfd_error_malformed_archive,
261 . bfd_error_file_not_recognized,
262 . bfd_error_file_ambiguously_recognized,
263 . bfd_error_no_contents,
264 . bfd_error_nonrepresentable_section,
265 . bfd_error_no_debug_section,
266 . bfd_error_bad_value,
267 . bfd_error_file_truncated,
268 . bfd_error_file_too_big,
269 . bfd_error_invalid_error_code
275 static bfd_error_type bfd_error = bfd_error_no_error;
277 const char *const bfd_errmsgs[] =
280 N_("System call error"),
281 N_("Invalid bfd target"),
282 N_("File in wrong format"),
283 N_("Archive object file in wrong format"),
284 N_("Invalid operation"),
285 N_("Memory exhausted"),
287 N_("Archive has no index; run ranlib to add one"),
288 N_("No more archived files"),
289 N_("Malformed archive"),
290 N_("File format not recognized"),
291 N_("File format is ambiguous"),
292 N_("Section has no contents"),
293 N_("Nonrepresentable section on output"),
294 N_("Symbol needs debug section which does not exist"),
296 N_("File truncated"),
298 N_("#<Invalid error code>")
306 bfd_error_type bfd_get_error (void);
309 Return the current BFD error condition.
323 void bfd_set_error (bfd_error_type error_tag);
326 Set the BFD error condition to be @var{error_tag}.
330 bfd_set_error (bfd_error_type error_tag)
332 bfd_error = error_tag;
340 const char *bfd_errmsg (bfd_error_type error_tag);
343 Return a string describing the error @var{error_tag}, or
344 the system error if @var{error_tag} is <<bfd_error_system_call>>.
348 bfd_errmsg (bfd_error_type error_tag)
353 if (error_tag == bfd_error_system_call)
354 return xstrerror (errno);
356 if (error_tag > bfd_error_invalid_error_code)
357 error_tag = bfd_error_invalid_error_code; /* sanity check */
359 return _(bfd_errmsgs [error_tag]);
367 void bfd_perror (const char *message);
370 Print to the standard error stream a string describing the
371 last BFD error that occurred, or the last system error if
372 the last BFD error was a system call failure. If @var{message}
373 is non-NULL and non-empty, the error string printed is preceded
374 by @var{message}, a colon, and a space. It is followed by a newline.
378 bfd_perror (const char *message)
380 if (bfd_get_error () == bfd_error_system_call)
381 /* Must be a system error then. */
382 perror ((char *) message);
385 if (message == NULL || *message == '\0')
386 fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ()));
388 fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ()));
396 Some BFD functions want to print messages describing the
397 problem. They call a BFD error handler function. This
398 function may be overridden by the program.
400 The BFD error handler acts like printf.
404 .typedef void (*bfd_error_handler_type) (const char *, ...);
408 /* The program name used when printing BFD error messages. */
410 static const char *_bfd_error_program_name;
412 /* This is the default routine to handle BFD error messages.
413 Like fprintf (stderr, ...), but also handles some extra format specifiers.
415 %A section name from section. For group components, print group name too.
416 %B file name from bfd. For archive components, prints archive too.
420 _bfd_default_error_handler (const char *fmt, ...)
424 const char *new_fmt, *p;
428 if (_bfd_error_program_name != NULL)
429 fprintf (stderr, "%s: ", _bfd_error_program_name);
431 fprintf (stderr, "BFD: ");
437 /* Reserve enough space for the existing format string. */
438 avail -= strlen (fmt) + 1;
446 size_t len, extra, trim;
449 if (p == NULL || p[1] == '\0')
454 memcpy (bufp, fmt, len + 1);
459 if (p[1] == 'A' || p[1] == 'B')
462 memcpy (bufp, fmt, len);
467 /* If we run out of space, tough, you lose your ridiculously
468 long file or section name. It's not safe to try to alloc
469 memory here; We might be printing an out of memory message. */
480 bfd *abfd = va_arg (ap, bfd *);
481 if (abfd->my_archive)
482 snprintf (bufp, avail, "%s(%s)",
483 abfd->my_archive->filename, abfd->filename);
485 snprintf (bufp, avail, "%s", abfd->filename);
489 asection *sec = va_arg (ap, asection *);
490 bfd *abfd = sec->owner;
491 const char *group = NULL;
492 struct coff_comdat_info *ci;
495 && bfd_get_flavour (abfd) == bfd_target_elf_flavour
496 && elf_next_in_group (sec) != NULL
497 && (sec->flags & SEC_GROUP) == 0)
498 group = elf_group_name (sec);
499 else if (abfd != NULL
500 && bfd_get_flavour (abfd) == bfd_target_coff_flavour
501 && (ci = bfd_coff_get_comdat_section (sec->owner,
505 snprintf (bufp, avail, "%s[%s]", sec->name, group);
507 snprintf (bufp, avail, "%s", sec->name);
510 avail = avail - len + 2;
512 /* We need to replace any '%' we printed by "%%".
513 First count how many. */
517 while ((q = strchr (q, '%')) != NULL)
523 /* If there isn't room, trim off the end of the string. */
528 trim = extra - avail;
541 /* Now double all '%' chars, shuffling the string as we go. */
544 while ((q[extra] = *q) != '%')
554 vfprintf (stderr, new_fmt, ap);
560 /* This is a function pointer to the routine which should handle BFD
561 error messages. It is called when a BFD routine encounters an
562 error for which it wants to print a message. Going through a
563 function pointer permits a program linked against BFD to intercept
564 the messages and deal with them itself. */
566 bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler;
570 bfd_set_error_handler
573 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type);
576 Set the BFD error handler function. Returns the previous
580 bfd_error_handler_type
581 bfd_set_error_handler (bfd_error_handler_type pnew)
583 bfd_error_handler_type pold;
585 pold = _bfd_error_handler;
586 _bfd_error_handler = pnew;
592 bfd_set_error_program_name
595 void bfd_set_error_program_name (const char *);
598 Set the program name to use when printing a BFD error. This
599 is printed before the error message followed by a colon and
600 space. The string must not be changed after it is passed to
605 bfd_set_error_program_name (const char *name)
607 _bfd_error_program_name = name;
612 bfd_get_error_handler
615 bfd_error_handler_type bfd_get_error_handler (void);
618 Return the BFD error handler function.
621 bfd_error_handler_type
622 bfd_get_error_handler (void)
624 return _bfd_error_handler;
632 Miscellaneous functions
637 bfd_get_reloc_upper_bound
640 long bfd_get_reloc_upper_bound (bfd *abfd, asection *sect);
643 Return the number of bytes required to store the
644 relocation information associated with section @var{sect}
645 attached to bfd @var{abfd}. If an error occurs, return -1.
650 bfd_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
652 if (abfd->format != bfd_object)
654 bfd_set_error (bfd_error_invalid_operation);
658 return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
663 bfd_canonicalize_reloc
666 long bfd_canonicalize_reloc
667 (bfd *abfd, asection *sec, arelent **loc, asymbol **syms);
670 Call the back end associated with the open BFD
671 @var{abfd} and translate the external form of the relocation
672 information attached to @var{sec} into the internal canonical
673 form. Place the table into memory at @var{loc}, which has
674 been preallocated, usually by a call to
675 <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or
678 The @var{syms} table is also needed for horrible internal magic
683 bfd_canonicalize_reloc (bfd *abfd,
688 if (abfd->format != bfd_object)
690 bfd_set_error (bfd_error_invalid_operation);
694 return BFD_SEND (abfd, _bfd_canonicalize_reloc,
695 (abfd, asect, location, symbols));
704 (bfd *abfd, asection *sec, arelent **rel, unsigned int count);
707 Set the relocation pointer and count within
708 section @var{sec} to the values @var{rel} and @var{count}.
709 The argument @var{abfd} is ignored.
714 bfd_set_reloc (bfd *ignore_abfd ATTRIBUTE_UNUSED,
719 asect->orelocation = location;
720 asect->reloc_count = count;
728 bfd_boolean bfd_set_file_flags (bfd *abfd, flagword flags);
731 Set the flag word in the BFD @var{abfd} to the value @var{flags}.
734 o <<bfd_error_wrong_format>> - The target bfd was not of object format.
735 o <<bfd_error_invalid_operation>> - The target bfd was open for reading.
736 o <<bfd_error_invalid_operation>> -
737 The flag word contained a bit which was not applicable to the
738 type of file. E.g., an attempt was made to set the <<D_PAGED>> bit
739 on a BFD format which does not support demand paging.
744 bfd_set_file_flags (bfd *abfd, flagword flags)
746 if (abfd->format != bfd_object)
748 bfd_set_error (bfd_error_wrong_format);
752 if (bfd_read_p (abfd))
754 bfd_set_error (bfd_error_invalid_operation);
758 bfd_get_file_flags (abfd) = flags;
759 if ((flags & bfd_applicable_file_flags (abfd)) != flags)
761 bfd_set_error (bfd_error_invalid_operation);
769 bfd_assert (const char *file, int line)
771 (*_bfd_error_handler) (_("BFD %s assertion fail %s:%d"),
772 BFD_VERSION_STRING, file, line);
775 /* A more or less friendly abort message. In libbfd.h abort is
776 defined to call this function. */
779 #define EXIT_FAILURE 1
783 _bfd_abort (const char *file, int line, const char *fn)
786 (*_bfd_error_handler)
787 (_("BFD %s internal error, aborting at %s line %d in %s\n"),
788 BFD_VERSION_STRING, file, line, fn);
790 (*_bfd_error_handler)
791 (_("BFD %s internal error, aborting at %s line %d\n"),
792 BFD_VERSION_STRING, file, line);
793 (*_bfd_error_handler) (_("Please report this bug.\n"));
794 xexit (EXIT_FAILURE);
802 int bfd_get_arch_size (bfd *abfd);
805 Returns the architecture address size, in bits, as determined
806 by the object file's format. For ELF, this information is
807 included in the header.
810 Returns the arch size in bits if known, <<-1>> otherwise.
814 bfd_get_arch_size (bfd *abfd)
816 if (abfd->xvec->flavour == bfd_target_elf_flavour)
817 return get_elf_backend_data (abfd)->s->arch_size;
824 bfd_get_sign_extend_vma
827 int bfd_get_sign_extend_vma (bfd *abfd);
830 Indicates if the target architecture "naturally" sign extends
831 an address. Some architectures implicitly sign extend address
832 values when they are converted to types larger than the size
833 of an address. For instance, bfd_get_start_address() will
834 return an address sign extended to fill a bfd_vma when this is
838 Returns <<1>> if the target architecture is known to sign
839 extend addresses, <<0>> if the target architecture is known to
840 not sign extend addresses, and <<-1>> otherwise.
844 bfd_get_sign_extend_vma (bfd *abfd)
848 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
849 return get_elf_backend_data (abfd)->sign_extend_vma;
851 name = bfd_get_target (abfd);
853 /* Return a proper value for DJGPP & PE COFF (x86 COFF variants).
854 This function is required for DWARF2 support, but there is
855 no place to store this information in the COFF back end.
856 Should enough other COFF targets add support for DWARF2,
857 a place will have to be found. Until then, this hack will do. */
858 if (strncmp (name, "coff-go32", sizeof ("coff-go32") - 1) == 0
859 || strcmp (name, "pe-i386") == 0
860 || strcmp (name, "pei-i386") == 0)
863 bfd_set_error (bfd_error_wrong_format);
869 bfd_set_start_address
872 bfd_boolean bfd_set_start_address (bfd *abfd, bfd_vma vma);
875 Make @var{vma} the entry point of output BFD @var{abfd}.
878 Returns <<TRUE>> on success, <<FALSE>> otherwise.
882 bfd_set_start_address (bfd *abfd, bfd_vma vma)
884 abfd->start_address = vma;
893 unsigned int bfd_get_gp_size (bfd *abfd);
896 Return the maximum size of objects to be optimized using the GP
897 register under MIPS ECOFF. This is typically set by the <<-G>>
898 argument to the compiler, assembler or linker.
902 bfd_get_gp_size (bfd *abfd)
904 if (abfd->format == bfd_object)
906 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
907 return ecoff_data (abfd)->gp_size;
908 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
909 return elf_gp_size (abfd);
919 void bfd_set_gp_size (bfd *abfd, unsigned int i);
922 Set the maximum size of objects to be optimized using the GP
923 register under ECOFF or MIPS ELF. This is typically set by
924 the <<-G>> argument to the compiler, assembler or linker.
928 bfd_set_gp_size (bfd *abfd, unsigned int i)
930 /* Don't try to set GP size on an archive or core file! */
931 if (abfd->format != bfd_object)
934 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
935 ecoff_data (abfd)->gp_size = i;
936 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
937 elf_gp_size (abfd) = i;
940 /* Get the GP value. This is an internal function used by some of the
941 relocation special_function routines on targets which support a GP
945 _bfd_get_gp_value (bfd *abfd)
949 if (abfd->format != bfd_object)
952 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
953 return ecoff_data (abfd)->gp;
954 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
955 return elf_gp (abfd);
960 /* Set the GP value. */
963 _bfd_set_gp_value (bfd *abfd, bfd_vma v)
967 if (abfd->format != bfd_object)
970 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
971 ecoff_data (abfd)->gp = v;
972 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
981 bfd_vma bfd_scan_vma (const char *string, const char **end, int base);
984 Convert, like <<strtoul>>, a numerical expression
985 @var{string} into a <<bfd_vma>> integer, and return that integer.
986 (Though without as many bells and whistles as <<strtoul>>.)
987 The expression is assumed to be unsigned (i.e., positive).
988 If given a @var{base}, it is used as the base for conversion.
989 A base of 0 causes the function to interpret the string
990 in hex if a leading "0x" or "0X" is found, otherwise
991 in octal if a leading zero is found, otherwise in decimal.
993 If the value would overflow, the maximum <<bfd_vma>> value is
998 bfd_scan_vma (const char *string, const char **end, int base)
1002 unsigned int cutlim;
1005 /* Let the host do it if possible. */
1006 if (sizeof (bfd_vma) <= sizeof (unsigned long))
1007 return strtoul (string, (char **) end, base);
1009 #ifdef HAVE_STRTOULL
1010 if (sizeof (bfd_vma) <= sizeof (unsigned long long))
1011 return strtoull (string, (char **) end, base);
1016 if (string[0] == '0')
1018 if ((string[1] == 'x') || (string[1] == 'X'))
1025 if ((base < 2) || (base > 36))
1030 && (string[1] == 'x' || string[1] == 'X')
1031 && ISXDIGIT (string[2]))
1036 cutoff = (~ (bfd_vma) 0) / (bfd_vma) base;
1037 cutlim = (~ (bfd_vma) 0) % (bfd_vma) base;
1045 if (ISDIGIT (digit))
1046 digit = digit - '0';
1047 else if (ISALPHA (digit))
1048 digit = TOUPPER (digit) - 'A' + 10;
1051 if (digit >= (unsigned int) base)
1053 if (value > cutoff || (value == cutoff && digit > cutlim))
1055 value = value * base + digit;
1060 value = ~ (bfd_vma) 0;
1070 bfd_copy_private_header_data
1073 bfd_boolean bfd_copy_private_header_data (bfd *ibfd, bfd *obfd);
1076 Copy private BFD header information from the BFD @var{ibfd} to the
1077 the BFD @var{obfd}. This copies information that may require
1078 sections to exist, but does not require symbol tables. Return
1079 <<true>> on success, <<false>> on error.
1080 Possible error returns are:
1082 o <<bfd_error_no_memory>> -
1083 Not enough memory exists to create private data for @var{obfd}.
1085 .#define bfd_copy_private_header_data(ibfd, obfd) \
1086 . BFD_SEND (obfd, _bfd_copy_private_header_data, \
1093 bfd_copy_private_bfd_data
1096 bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd);
1099 Copy private BFD information from the BFD @var{ibfd} to the
1100 the BFD @var{obfd}. Return <<TRUE>> on success, <<FALSE>> on error.
1101 Possible error returns are:
1103 o <<bfd_error_no_memory>> -
1104 Not enough memory exists to create private data for @var{obfd}.
1106 .#define bfd_copy_private_bfd_data(ibfd, obfd) \
1107 . BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
1114 bfd_merge_private_bfd_data
1117 bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd);
1120 Merge private BFD information from the BFD @var{ibfd} to the
1121 the output file BFD @var{obfd} when linking. Return <<TRUE>>
1122 on success, <<FALSE>> on error. Possible error returns are:
1124 o <<bfd_error_no_memory>> -
1125 Not enough memory exists to create private data for @var{obfd}.
1127 .#define bfd_merge_private_bfd_data(ibfd, obfd) \
1128 . BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
1135 bfd_set_private_flags
1138 bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags);
1141 Set private BFD flag information in the BFD @var{abfd}.
1142 Return <<TRUE>> on success, <<FALSE>> on error. Possible error
1145 o <<bfd_error_no_memory>> -
1146 Not enough memory exists to create private data for @var{obfd}.
1148 .#define bfd_set_private_flags(abfd, flags) \
1149 . BFD_SEND (abfd, _bfd_set_private_flags, (abfd, flags))
1158 The following functions exist but have not yet been documented.
1160 .#define bfd_sizeof_headers(abfd, reloc) \
1161 . BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc))
1163 .#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
1164 . BFD_SEND (abfd, _bfd_find_nearest_line, \
1165 . (abfd, sec, syms, off, file, func, line))
1167 .#define bfd_find_line(abfd, syms, sym, file, line) \
1168 . BFD_SEND (abfd, _bfd_find_line, \
1169 . (abfd, syms, sym, file, line))
1171 .#define bfd_find_inliner_info(abfd, file, func, line) \
1172 . BFD_SEND (abfd, _bfd_find_inliner_info, \
1173 . (abfd, file, func, line))
1175 .#define bfd_debug_info_start(abfd) \
1176 . BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
1178 .#define bfd_debug_info_end(abfd) \
1179 . BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
1181 .#define bfd_debug_info_accumulate(abfd, section) \
1182 . BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
1184 .#define bfd_stat_arch_elt(abfd, stat) \
1185 . BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
1187 .#define bfd_update_armap_timestamp(abfd) \
1188 . BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd))
1190 .#define bfd_set_arch_mach(abfd, arch, mach)\
1191 . BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
1193 .#define bfd_relax_section(abfd, section, link_info, again) \
1194 . BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again))
1196 .#define bfd_gc_sections(abfd, link_info) \
1197 . BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
1199 .#define bfd_merge_sections(abfd, link_info) \
1200 . BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
1202 .#define bfd_is_group_section(abfd, sec) \
1203 . BFD_SEND (abfd, _bfd_is_group_section, (abfd, sec))
1205 .#define bfd_discard_group(abfd, sec) \
1206 . BFD_SEND (abfd, _bfd_discard_group, (abfd, sec))
1208 .#define bfd_link_hash_table_create(abfd) \
1209 . BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
1211 .#define bfd_link_hash_table_free(abfd, hash) \
1212 . BFD_SEND (abfd, _bfd_link_hash_table_free, (hash))
1214 .#define bfd_link_add_symbols(abfd, info) \
1215 . BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
1217 .#define bfd_link_just_syms(abfd, sec, info) \
1218 . BFD_SEND (abfd, _bfd_link_just_syms, (sec, info))
1220 .#define bfd_final_link(abfd, info) \
1221 . BFD_SEND (abfd, _bfd_final_link, (abfd, info))
1223 .#define bfd_free_cached_info(abfd) \
1224 . BFD_SEND (abfd, _bfd_free_cached_info, (abfd))
1226 .#define bfd_get_dynamic_symtab_upper_bound(abfd) \
1227 . BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd))
1229 .#define bfd_print_private_bfd_data(abfd, file)\
1230 . BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file))
1232 .#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \
1233 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols))
1235 .#define bfd_get_synthetic_symtab(abfd, count, syms, dyncount, dynsyms, ret) \
1236 . BFD_SEND (abfd, _bfd_get_synthetic_symtab, (abfd, count, syms, \
1237 . dyncount, dynsyms, ret))
1239 .#define bfd_get_dynamic_reloc_upper_bound(abfd) \
1240 . BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd))
1242 .#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \
1243 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms))
1245 .extern bfd_byte *bfd_get_relocated_section_contents
1246 . (bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *,
1247 . bfd_boolean, asymbol **);
1253 bfd_get_relocated_section_contents (bfd *abfd,
1254 struct bfd_link_info *link_info,
1255 struct bfd_link_order *link_order,
1257 bfd_boolean relocatable,
1261 bfd_byte *(*fn) (bfd *, struct bfd_link_info *, struct bfd_link_order *,
1262 bfd_byte *, bfd_boolean, asymbol **);
1264 if (link_order->type == bfd_indirect_link_order)
1266 abfd2 = link_order->u.indirect.section->owner;
1273 fn = abfd2->xvec->_bfd_get_relocated_section_contents;
1275 return (*fn) (abfd, link_info, link_order, data, relocatable, symbols);
1278 /* Record information about an ELF program header. */
1281 bfd_record_phdr (bfd *abfd,
1283 bfd_boolean flags_valid,
1285 bfd_boolean at_valid,
1287 bfd_boolean includes_filehdr,
1288 bfd_boolean includes_phdrs,
1292 struct elf_segment_map *m, **pm;
1295 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
1298 amt = sizeof (struct elf_segment_map);
1299 amt += ((bfd_size_type) count - 1) * sizeof (asection *);
1300 m = bfd_alloc (abfd, amt);
1308 m->p_flags_valid = flags_valid;
1309 m->p_paddr_valid = at_valid;
1310 m->includes_filehdr = includes_filehdr;
1311 m->includes_phdrs = includes_phdrs;
1314 memcpy (m->sections, secs, count * sizeof (asection *));
1316 for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next)
1324 bfd_sprintf_vma (bfd *abfd, char *buf, bfd_vma value)
1326 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1327 get_elf_backend_data (abfd)->elf_backend_sprintf_vma (abfd, buf, value);
1329 sprintf_vma (buf, value);
1333 bfd_fprintf_vma (bfd *abfd, void *stream, bfd_vma value)
1335 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1336 get_elf_backend_data (abfd)->elf_backend_fprintf_vma (abfd, stream, value);
1338 fprintf_vma ((FILE *) stream, value);
1346 bfd_boolean bfd_alt_mach_code (bfd *abfd, int alternative);
1350 When more than one machine code number is available for the
1351 same machine type, this function can be used to switch between
1352 the preferred one (alternative == 0) and any others. Currently,
1353 only ELF supports this feature, with up to two alternate
1358 bfd_alt_mach_code (bfd *abfd, int alternative)
1360 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1364 switch (alternative)
1367 code = get_elf_backend_data (abfd)->elf_machine_code;
1371 code = get_elf_backend_data (abfd)->elf_machine_alt1;
1377 code = get_elf_backend_data (abfd)->elf_machine_alt2;
1386 elf_elfheader (abfd)->e_machine = code;
1397 .struct bfd_preserve
1402 . const struct bfd_arch_info *arch_info;
1403 . struct bfd_section *sections;
1404 . struct bfd_section *section_last;
1405 . unsigned int section_count;
1406 . struct bfd_hash_table section_htab;
1416 bfd_boolean bfd_preserve_save (bfd *, struct bfd_preserve *);
1419 When testing an object for compatibility with a particular
1420 target back-end, the back-end object_p function needs to set
1421 up certain fields in the bfd on successfully recognizing the
1422 object. This typically happens in a piecemeal fashion, with
1423 failures possible at many points. On failure, the bfd is
1424 supposed to be restored to its initial state, which is
1425 virtually impossible. However, restoring a subset of the bfd
1426 state works in practice. This function stores the subset and
1427 reinitializes the bfd.
1432 bfd_preserve_save (bfd *abfd, struct bfd_preserve *preserve)
1434 preserve->tdata = abfd->tdata.any;
1435 preserve->arch_info = abfd->arch_info;
1436 preserve->flags = abfd->flags;
1437 preserve->sections = abfd->sections;
1438 preserve->section_last = abfd->section_last;
1439 preserve->section_count = abfd->section_count;
1440 preserve->section_htab = abfd->section_htab;
1442 if (! bfd_hash_table_init (&abfd->section_htab, bfd_section_hash_newfunc))
1445 abfd->tdata.any = NULL;
1446 abfd->arch_info = &bfd_default_arch_struct;
1447 abfd->flags &= BFD_IN_MEMORY;
1448 abfd->sections = NULL;
1449 abfd->section_last = NULL;
1450 abfd->section_count = 0;
1457 bfd_preserve_restore
1460 void bfd_preserve_restore (bfd *, struct bfd_preserve *);
1463 This function restores bfd state saved by bfd_preserve_save.
1464 If MARKER is non-NULL in struct bfd_preserve then that block
1465 and all subsequently bfd_alloc'd memory is freed.
1470 bfd_preserve_restore (bfd *abfd, struct bfd_preserve *preserve)
1472 bfd_hash_table_free (&abfd->section_htab);
1474 abfd->tdata.any = preserve->tdata;
1475 abfd->arch_info = preserve->arch_info;
1476 abfd->flags = preserve->flags;
1477 abfd->section_htab = preserve->section_htab;
1478 abfd->sections = preserve->sections;
1479 abfd->section_last = preserve->section_last;
1480 abfd->section_count = preserve->section_count;
1482 /* bfd_release frees all memory more recently bfd_alloc'd than
1483 its arg, as well as its arg. */
1484 if (preserve->marker != NULL)
1486 bfd_release (abfd, preserve->marker);
1487 preserve->marker = NULL;
1496 void bfd_preserve_finish (bfd *, struct bfd_preserve *);
1499 This function should be called when the bfd state saved by
1500 bfd_preserve_save is no longer needed. ie. when the back-end
1501 object_p function returns with success.
1506 bfd_preserve_finish (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_preserve *preserve)
1508 /* It would be nice to be able to free more memory here, eg. old
1509 tdata, but that's not possible since these blocks are sitting
1510 inside bfd_alloc'd memory. The section hash is on a separate
1512 bfd_hash_table_free (&preserve->section_htab);
1520 void bfd_hide_symbol (bfd *,
1521 struct bfd_link_info *,
1522 struct bfd_link_hash_entry *,
1526 This function hides a symbol so that it won't be exported.
1531 bfd_hide_symbol (bfd *abfd,
1532 struct bfd_link_info *link_info,
1533 struct bfd_link_hash_entry *h,
1534 bfd_boolean force_local)
1536 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1537 (get_elf_backend_data (abfd)->elf_backend_hide_symbol)
1538 (link_info, (struct elf_link_hash_entry *) h, force_local);