1 /* Generic BFD library interface and support routines.
2 Copyright (C) 1990-2015 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
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 3 of the License, or
10 (at your option) any later version.
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.
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., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
24 typedef bfd, Error reporting, BFD front end, BFD front end
29 A BFD has type <<bfd>>; objects of this type are the
30 cornerstone of any application using BFD. Using BFD
31 consists of making references though the BFD and to data in the BFD.
33 Here is the structure that defines the type <<bfd>>. It
34 contains the major data about the file and pointers
35 to the rest of the data.
43 . write_direction = 2,
47 .enum bfd_plugin_format
49 . bfd_plugin_uknown = 0,
56 . {* The filename the application opened the BFD with. *}
57 . const char *filename;
59 . {* A pointer to the target jump table. *}
60 . const struct bfd_target *xvec;
62 . {* The IOSTREAM, and corresponding IO vector that provide access
63 . to the file backing the BFD. *}
65 . const struct bfd_iovec *iovec;
67 . {* The caching routines use these to maintain a
68 . least-recently-used list of BFDs. *}
69 . struct bfd *lru_prev, *lru_next;
71 . {* When a file is closed by the caching routines, BFD retains
72 . state information on the file here... *}
75 . {* File modified time, if mtime_set is TRUE. *}
78 . {* A unique identifier of the BFD *}
81 . {* The format which belongs to the BFD. (object, core, etc.) *}
82 . ENUM_BITFIELD (bfd_format) format : 3;
84 . {* The direction with which the BFD was opened. *}
85 . ENUM_BITFIELD (bfd_direction) direction : 2;
87 . {* Format_specific flags. *}
88 . flagword flags : 17;
90 . {* Values that may appear in the flags field of a BFD. These also
91 . appear in the object_flags field of the bfd_target structure, where
92 . they indicate the set of flags used by that backend (not all flags
93 . are meaningful for all object file formats) (FIXME: at the moment,
94 . the object_flags values have mostly just been copied from backend
95 . to another, and are not necessarily correct). *}
97 .#define BFD_NO_FLAGS 0x00
99 . {* BFD contains relocation entries. *}
100 .#define HAS_RELOC 0x01
102 . {* BFD is directly executable. *}
105 . {* BFD has line number information (basically used for F_LNNO in a
107 .#define HAS_LINENO 0x04
109 . {* BFD has debugging information. *}
110 .#define HAS_DEBUG 0x08
112 . {* BFD has symbols. *}
113 .#define HAS_SYMS 0x10
115 . {* BFD has local symbols (basically used for F_LSYMS in a COFF
117 .#define HAS_LOCALS 0x20
119 . {* BFD is a dynamic object. *}
120 .#define DYNAMIC 0x40
122 . {* Text section is write protected (if D_PAGED is not set, this is
123 . like an a.out NMAGIC file) (the linker sets this by default, but
124 . clears it for -r or -N). *}
125 .#define WP_TEXT 0x80
127 . {* BFD is dynamically paged (this is like an a.out ZMAGIC file) (the
128 . linker sets this by default, but clears it for -r or -n or -N). *}
129 .#define D_PAGED 0x100
131 . {* BFD is relaxable (this means that bfd_relax_section may be able to
132 . do something) (sometimes bfd_relax_section can do something even if
133 . this is not set). *}
134 .#define BFD_IS_RELAXABLE 0x200
136 . {* This may be set before writing out a BFD to request using a
137 . traditional format. For example, this is used to request that when
138 . writing out an a.out object the symbols not be hashed to eliminate
140 .#define BFD_TRADITIONAL_FORMAT 0x400
142 . {* This flag indicates that the BFD contents are actually cached
143 . in memory. If this is set, iostream points to a bfd_in_memory
145 .#define BFD_IN_MEMORY 0x800
147 . {* This BFD has been created by the linker and doesn't correspond
148 . to any input file. *}
149 .#define BFD_LINKER_CREATED 0x1000
151 . {* This may be set before writing out a BFD to request that it
152 . be written using values for UIDs, GIDs, timestamps, etc. that
153 . will be consistent from run to run. *}
154 .#define BFD_DETERMINISTIC_OUTPUT 0x2000
156 . {* Compress sections in this BFD. *}
157 .#define BFD_COMPRESS 0x4000
159 . {* Decompress sections in this BFD. *}
160 .#define BFD_DECOMPRESS 0x8000
162 . {* BFD is a dummy, for plugins. *}
163 .#define BFD_PLUGIN 0x10000
165 . {* Flags bits to be saved in bfd_preserve_save. *}
166 .#define BFD_FLAGS_SAVED \
167 . (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_PLUGIN)
169 . {* Flags bits which are for BFD use only. *}
170 .#define BFD_FLAGS_FOR_BFD_USE_MASK \
171 . (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
172 . | BFD_PLUGIN | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT)
174 . {* Is the file descriptor being cached? That is, can it be closed as
175 . needed, and re-opened when accessed later? *}
176 . unsigned int cacheable : 1;
178 . {* Marks whether there was a default target specified when the
179 . BFD was opened. This is used to select which matching algorithm
180 . to use to choose the back end. *}
181 . unsigned int target_defaulted : 1;
183 . {* ... and here: (``once'' means at least once). *}
184 . unsigned int opened_once : 1;
186 . {* Set if we have a locally maintained mtime value, rather than
187 . getting it from the file each time. *}
188 . unsigned int mtime_set : 1;
190 . {* Flag set if symbols from this BFD should not be exported. *}
191 . unsigned int no_export : 1;
193 . {* Remember when output has begun, to stop strange things
195 . unsigned int output_has_begun : 1;
197 . {* Have archive map. *}
198 . unsigned int has_armap : 1;
200 . {* Set if this is a thin archive. *}
201 . unsigned int is_thin_archive : 1;
203 . {* Set if only required symbols should be added in the link hash table for
204 . this object. Used by VMS linkers. *}
205 . unsigned int selective_search : 1;
207 . {* Set if this is the linker output BFD. *}
208 . unsigned int is_linker_output : 1;
210 . {* If this is an input for a compiler plug-in library. *}
211 . ENUM_BITFIELD (bfd_plugin_format) plugin_format : 2;
213 . {* Set to dummy BFD created when claimed by a compiler plug-in
215 . bfd *plugin_dummy_bfd;
217 . {* Currently my_archive is tested before adding origin to
218 . anything. I believe that this can become always an add of
219 . origin, with origin set to 0 for non archive files. *}
222 . {* The origin in the archive of the proxy entry. This will
223 . normally be the same as origin, except for thin archives,
224 . when it will contain the current offset of the proxy in the
225 . thin archive rather than the offset of the bfd in its actual
227 . ufile_ptr proxy_origin;
229 . {* A hash table for section names. *}
230 . struct bfd_hash_table section_htab;
232 . {* Pointer to linked list of sections. *}
233 . struct bfd_section *sections;
235 . {* The last section on the section list. *}
236 . struct bfd_section *section_last;
238 . {* The number of sections. *}
239 . unsigned int section_count;
241 . {* A field used by _bfd_generic_link_add_archive_symbols. This will
242 . be used only for archive elements. *}
245 . {* Stuff only useful for object files:
246 . The start address. *}
247 . bfd_vma start_address;
249 . {* Symbol table for output BFD (with symcount entries).
250 . Also used by the linker to cache input BFD symbols. *}
251 . struct bfd_symbol **outsymbols;
253 . {* Used for input and output. *}
254 . unsigned int symcount;
256 . {* Used for slurped dynamic symbol tables. *}
257 . unsigned int dynsymcount;
259 . {* Pointer to structure which contains architecture information. *}
260 . const struct bfd_arch_info *arch_info;
262 . {* Stuff only useful for archives. *}
264 . struct bfd *my_archive; {* The containing archive BFD. *}
265 . struct bfd *archive_next; {* The next BFD in the archive. *}
266 . struct bfd *archive_head; {* The first BFD in the archive. *}
267 . struct bfd *nested_archives; {* List of nested archive in a flattened
271 . {* For input BFDs, a chain of BFDs involved in a link. *}
273 . {* For output BFD, the linker hash table. *}
274 . struct bfd_link_hash_table *hash;
277 . {* Used by the back end to hold private data. *}
280 . struct aout_data_struct *aout_data;
281 . struct artdata *aout_ar_data;
282 . struct _oasys_data *oasys_obj_data;
283 . struct _oasys_ar_data *oasys_ar_data;
284 . struct coff_tdata *coff_obj_data;
285 . struct pe_tdata *pe_obj_data;
286 . struct xcoff_tdata *xcoff_obj_data;
287 . struct ecoff_tdata *ecoff_obj_data;
288 . struct ieee_data_struct *ieee_data;
289 . struct ieee_ar_data_struct *ieee_ar_data;
290 . struct srec_data_struct *srec_data;
291 . struct verilog_data_struct *verilog_data;
292 . struct ihex_data_struct *ihex_data;
293 . struct tekhex_data_struct *tekhex_data;
294 . struct elf_obj_tdata *elf_obj_data;
295 . struct nlm_obj_tdata *nlm_obj_data;
296 . struct bout_data_struct *bout_data;
297 . struct mmo_data_struct *mmo_data;
298 . struct sun_core_struct *sun_core_data;
299 . struct sco5_core_struct *sco5_core_data;
300 . struct trad_core_struct *trad_core_data;
301 . struct som_data_struct *som_data;
302 . struct hpux_core_struct *hpux_core_data;
303 . struct hppabsd_core_struct *hppabsd_core_data;
304 . struct sgi_core_struct *sgi_core_data;
305 . struct lynx_core_struct *lynx_core_data;
306 . struct osf_core_struct *osf_core_data;
307 . struct cisco_core_struct *cisco_core_data;
308 . struct versados_data_struct *versados_data;
309 . struct netbsd_core_struct *netbsd_core_data;
310 . struct mach_o_data_struct *mach_o_data;
311 . struct mach_o_fat_data_struct *mach_o_fat_data;
312 . struct plugin_data_struct *plugin_data;
313 . struct bfd_pef_data_struct *pef_data;
314 . struct bfd_pef_xlib_data_struct *pef_xlib_data;
315 . struct bfd_sym_data_struct *sym_data;
320 . {* Used by the application to hold private data. *}
323 . {* Where all the allocated stuff under this BFD goes. This is a
324 . struct objalloc *, but we use void * to avoid requiring the inclusion
329 .{* See note beside bfd_set_section_userdata. *}
330 .static inline bfd_boolean
331 .bfd_set_cacheable (bfd * abfd, bfd_boolean val)
333 . abfd->cacheable = val;
343 #include "libiberty.h"
344 #include "demangle.h"
345 #include "safe-ctype.h"
348 #include "coff/internal.h"
349 #include "coff/sym.h"
351 #include "libecoff.h"
356 #define EXIT_FAILURE 1
360 /* provide storage for subsystem, stack and heap data which may have been
361 passed in on the command line. Ld puts this data into a bfd_link_info
362 struct which ultimately gets passed in to the bfd. When it arrives, copy
363 it to the following struct so that the data will be available in coffcode.h
364 where it is needed. The typedef's used are defined in bfd.h */
368 Error reporting, Miscellaneous, typedef bfd, BFD front end
373 Most BFD functions return nonzero on success (check their
374 individual documentation for precise semantics). On an error,
375 they call <<bfd_set_error>> to set an error condition that callers
376 can check by calling <<bfd_get_error>>.
377 If that returns <<bfd_error_system_call>>, then check
380 The easiest way to report a BFD error to the user is to
384 Type <<bfd_error_type>>
386 The values returned by <<bfd_get_error>> are defined by the
387 enumerated type <<bfd_error_type>>.
391 .typedef enum bfd_error
393 . bfd_error_no_error = 0,
394 . bfd_error_system_call,
395 . bfd_error_invalid_target,
396 . bfd_error_wrong_format,
397 . bfd_error_wrong_object_format,
398 . bfd_error_invalid_operation,
399 . bfd_error_no_memory,
400 . bfd_error_no_symbols,
401 . bfd_error_no_armap,
402 . bfd_error_no_more_archived_files,
403 . bfd_error_malformed_archive,
404 . bfd_error_missing_dso,
405 . bfd_error_file_not_recognized,
406 . bfd_error_file_ambiguously_recognized,
407 . bfd_error_no_contents,
408 . bfd_error_nonrepresentable_section,
409 . bfd_error_no_debug_section,
410 . bfd_error_bad_value,
411 . bfd_error_file_truncated,
412 . bfd_error_file_too_big,
413 . bfd_error_on_input,
414 . bfd_error_invalid_error_code
420 static bfd_error_type bfd_error = bfd_error_no_error;
421 static bfd *input_bfd = NULL;
422 static bfd_error_type input_error = bfd_error_no_error;
424 const char *const bfd_errmsgs[] =
427 N_("System call error"),
428 N_("Invalid bfd target"),
429 N_("File in wrong format"),
430 N_("Archive object file in wrong format"),
431 N_("Invalid operation"),
432 N_("Memory exhausted"),
434 N_("Archive has no index; run ranlib to add one"),
435 N_("No more archived files"),
436 N_("Malformed archive"),
437 N_("DSO missing from command line"),
438 N_("File format not recognized"),
439 N_("File format is ambiguous"),
440 N_("Section has no contents"),
441 N_("Nonrepresentable section on output"),
442 N_("Symbol needs debug section which does not exist"),
444 N_("File truncated"),
446 N_("Error reading %s: %s"),
447 N_("#<Invalid error code>")
455 bfd_error_type bfd_get_error (void);
458 Return the current BFD error condition.
472 void bfd_set_error (bfd_error_type error_tag, ...);
475 Set the BFD error condition to be @var{error_tag}.
476 If @var{error_tag} is bfd_error_on_input, then this function
477 takes two more parameters, the input bfd where the error
478 occurred, and the bfd_error_type error.
482 bfd_set_error (bfd_error_type error_tag, ...)
484 bfd_error = error_tag;
485 if (error_tag == bfd_error_on_input)
487 /* This is an error that occurred during bfd_close when
488 writing an archive, but on one of the input files. */
491 va_start (ap, error_tag);
492 input_bfd = va_arg (ap, bfd *);
493 input_error = (bfd_error_type) va_arg (ap, int);
494 if (input_error >= bfd_error_on_input)
505 const char *bfd_errmsg (bfd_error_type error_tag);
508 Return a string describing the error @var{error_tag}, or
509 the system error if @var{error_tag} is <<bfd_error_system_call>>.
513 bfd_errmsg (bfd_error_type error_tag)
518 if (error_tag == bfd_error_on_input)
521 const char *msg = bfd_errmsg (input_error);
523 if (asprintf (&buf, _(bfd_errmsgs [error_tag]), input_bfd->filename, msg)
527 /* Ick, what to do on out of memory? */
531 if (error_tag == bfd_error_system_call)
532 return xstrerror (errno);
534 if (error_tag > bfd_error_invalid_error_code)
535 error_tag = bfd_error_invalid_error_code; /* sanity check */
537 return _(bfd_errmsgs [error_tag]);
545 void bfd_perror (const char *message);
548 Print to the standard error stream a string describing the
549 last BFD error that occurred, or the last system error if
550 the last BFD error was a system call failure. If @var{message}
551 is non-NULL and non-empty, the error string printed is preceded
552 by @var{message}, a colon, and a space. It is followed by a newline.
556 bfd_perror (const char *message)
559 if (message == NULL || *message == '\0')
560 fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ()));
562 fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ()));
570 Some BFD functions want to print messages describing the
571 problem. They call a BFD error handler function. This
572 function may be overridden by the program.
574 The BFD error handler acts like printf.
578 .typedef void (*bfd_error_handler_type) (const char *, ...);
582 /* The program name used when printing BFD error messages. */
584 static const char *_bfd_error_program_name;
586 /* This is the default routine to handle BFD error messages.
587 Like fprintf (stderr, ...), but also handles some extra format specifiers.
589 %A section name from section. For group components, print group name too.
590 %B file name from bfd. For archive components, prints archive too.
592 Note - because these two extra format specifiers require special handling
593 they are scanned for and processed in this function, before calling
594 vfprintf. This means that the *arguments* for these format specifiers
595 must be the first ones in the variable argument list, regardless of where
596 the specifiers appear in the format string. Thus for example calling
597 this function with a format string of:
599 "blah %s blah %A blah %d blah %B"
601 would involve passing the arguments as:
603 "blah %s blah %A blah %d blah %B",
611 _bfd_default_error_handler (const char *fmt, ...)
615 const char *new_fmt, *p;
619 /* PR 4992: Don't interrupt output being sent to stdout. */
622 if (_bfd_error_program_name != NULL)
623 fprintf (stderr, "%s: ", _bfd_error_program_name);
625 fprintf (stderr, "BFD: ");
631 /* Reserve enough space for the existing format string. */
632 avail -= strlen (fmt) + 1;
634 _exit (EXIT_FAILURE);
640 size_t len, extra, trim;
643 if (p == NULL || p[1] == '\0')
648 memcpy (bufp, fmt, len + 1);
653 if (p[1] == 'A' || p[1] == 'B')
656 memcpy (bufp, fmt, len);
661 /* If we run out of space, tough, you lose your ridiculously
662 long file or section name. It's not safe to try to alloc
663 memory here; We might be printing an out of memory message. */
674 bfd *abfd = va_arg (ap, bfd *);
677 /* Invoking %B with a null bfd pointer is an internal error. */
679 else if (abfd->my_archive)
680 snprintf (bufp, avail, "%s(%s)",
681 abfd->my_archive->filename, abfd->filename);
683 snprintf (bufp, avail, "%s", abfd->filename);
687 asection *sec = va_arg (ap, asection *);
689 const char *group = NULL;
690 struct coff_comdat_info *ci;
693 /* Invoking %A with a null section pointer is an internal error. */
697 && bfd_get_flavour (abfd) == bfd_target_elf_flavour
698 && elf_next_in_group (sec) != NULL
699 && (sec->flags & SEC_GROUP) == 0)
700 group = elf_group_name (sec);
701 else if (abfd != NULL
702 && bfd_get_flavour (abfd) == bfd_target_coff_flavour
703 && (ci = bfd_coff_get_comdat_section (sec->owner,
707 snprintf (bufp, avail, "%s[%s]", sec->name, group);
709 snprintf (bufp, avail, "%s", sec->name);
712 avail = avail - len + 2;
714 /* We need to replace any '%' we printed by "%%".
715 First count how many. */
719 while ((q = strchr (q, '%')) != NULL)
725 /* If there isn't room, trim off the end of the string. */
730 trim = extra - avail;
743 /* Now double all '%' chars, shuffling the string as we go. */
746 while ((q[extra] = *q) != '%')
756 vfprintf (stderr, new_fmt, ap);
759 /* On AIX, putc is implemented as a macro that triggers a -Wunused-value
760 warning, so use the fputc function to avoid it. */
761 fputc ('\n', stderr);
765 /* This is a function pointer to the routine which should handle BFD
766 error messages. It is called when a BFD routine encounters an
767 error for which it wants to print a message. Going through a
768 function pointer permits a program linked against BFD to intercept
769 the messages and deal with them itself. */
771 bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler;
775 bfd_set_error_handler
778 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type);
781 Set the BFD error handler function. Returns the previous
785 bfd_error_handler_type
786 bfd_set_error_handler (bfd_error_handler_type pnew)
788 bfd_error_handler_type pold;
790 pold = _bfd_error_handler;
791 _bfd_error_handler = pnew;
797 bfd_set_error_program_name
800 void bfd_set_error_program_name (const char *);
803 Set the program name to use when printing a BFD error. This
804 is printed before the error message followed by a colon and
805 space. The string must not be changed after it is passed to
810 bfd_set_error_program_name (const char *name)
812 _bfd_error_program_name = name;
817 bfd_get_error_handler
820 bfd_error_handler_type bfd_get_error_handler (void);
823 Return the BFD error handler function.
826 bfd_error_handler_type
827 bfd_get_error_handler (void)
829 return _bfd_error_handler;
836 If BFD finds an internal inconsistency, the bfd assert
837 handler is called with information on the BFD version, BFD
838 source file and line. If this happens, most programs linked
839 against BFD are expected to want to exit with an error, or mark
840 the current BFD operation as failed, so it is recommended to
841 override the default handler, which just calls
842 _bfd_error_handler and continues.
846 .typedef void (*bfd_assert_handler_type) (const char *bfd_formatmsg,
847 . const char *bfd_version,
848 . const char *bfd_file,
853 /* Note the use of bfd_ prefix on the parameter names above: we want to
854 show which one is the message and which is the version by naming the
855 parameters, but avoid polluting the program-using-bfd namespace as
856 the typedef is visible in the exported headers that the program
857 includes. Below, it's just for consistency. */
860 _bfd_default_assert_handler (const char *bfd_formatmsg,
861 const char *bfd_version,
862 const char *bfd_file,
866 (*_bfd_error_handler) (bfd_formatmsg, bfd_version, bfd_file, bfd_line);
869 /* Similar to _bfd_error_handler, a program can decide to exit on an
870 internal BFD error. We use a non-variadic type to simplify passing
871 on parameters to other functions, e.g. _bfd_error_handler. */
873 bfd_assert_handler_type _bfd_assert_handler = _bfd_default_assert_handler;
877 bfd_set_assert_handler
880 bfd_assert_handler_type bfd_set_assert_handler (bfd_assert_handler_type);
883 Set the BFD assert handler function. Returns the previous
887 bfd_assert_handler_type
888 bfd_set_assert_handler (bfd_assert_handler_type pnew)
890 bfd_assert_handler_type pold;
892 pold = _bfd_assert_handler;
893 _bfd_assert_handler = pnew;
899 bfd_get_assert_handler
902 bfd_assert_handler_type bfd_get_assert_handler (void);
905 Return the BFD assert handler function.
908 bfd_assert_handler_type
909 bfd_get_assert_handler (void)
911 return _bfd_assert_handler;
916 Miscellaneous, Memory Usage, Error reporting, BFD front end
922 Miscellaneous functions
927 bfd_get_reloc_upper_bound
930 long bfd_get_reloc_upper_bound (bfd *abfd, asection *sect);
933 Return the number of bytes required to store the
934 relocation information associated with section @var{sect}
935 attached to bfd @var{abfd}. If an error occurs, return -1.
940 bfd_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
942 if (abfd->format != bfd_object)
944 bfd_set_error (bfd_error_invalid_operation);
948 return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
953 bfd_canonicalize_reloc
956 long bfd_canonicalize_reloc
957 (bfd *abfd, asection *sec, arelent **loc, asymbol **syms);
960 Call the back end associated with the open BFD
961 @var{abfd} and translate the external form of the relocation
962 information attached to @var{sec} into the internal canonical
963 form. Place the table into memory at @var{loc}, which has
964 been preallocated, usually by a call to
965 <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or
968 The @var{syms} table is also needed for horrible internal magic
973 bfd_canonicalize_reloc (bfd *abfd,
978 if (abfd->format != bfd_object)
980 bfd_set_error (bfd_error_invalid_operation);
984 return BFD_SEND (abfd, _bfd_canonicalize_reloc,
985 (abfd, asect, location, symbols));
994 (bfd *abfd, asection *sec, arelent **rel, unsigned int count);
997 Set the relocation pointer and count within
998 section @var{sec} to the values @var{rel} and @var{count}.
999 The argument @var{abfd} is ignored.
1004 bfd_set_reloc (bfd *ignore_abfd ATTRIBUTE_UNUSED,
1009 asect->orelocation = location;
1010 asect->reloc_count = count;
1018 bfd_boolean bfd_set_file_flags (bfd *abfd, flagword flags);
1021 Set the flag word in the BFD @var{abfd} to the value @var{flags}.
1023 Possible errors are:
1024 o <<bfd_error_wrong_format>> - The target bfd was not of object format.
1025 o <<bfd_error_invalid_operation>> - The target bfd was open for reading.
1026 o <<bfd_error_invalid_operation>> -
1027 The flag word contained a bit which was not applicable to the
1028 type of file. E.g., an attempt was made to set the <<D_PAGED>> bit
1029 on a BFD format which does not support demand paging.
1034 bfd_set_file_flags (bfd *abfd, flagword flags)
1036 if (abfd->format != bfd_object)
1038 bfd_set_error (bfd_error_wrong_format);
1042 if (bfd_read_p (abfd))
1044 bfd_set_error (bfd_error_invalid_operation);
1048 bfd_get_file_flags (abfd) = flags;
1049 if ((flags & bfd_applicable_file_flags (abfd)) != flags)
1051 bfd_set_error (bfd_error_invalid_operation);
1059 bfd_assert (const char *file, int line)
1061 (*_bfd_assert_handler) (_("BFD %s assertion fail %s:%d"),
1062 BFD_VERSION_STRING, file, line);
1065 /* A more or less friendly abort message. In libbfd.h abort is
1066 defined to call this function. */
1069 _bfd_abort (const char *file, int line, const char *fn)
1072 (*_bfd_error_handler)
1073 (_("BFD %s internal error, aborting at %s line %d in %s\n"),
1074 BFD_VERSION_STRING, file, line, fn);
1076 (*_bfd_error_handler)
1077 (_("BFD %s internal error, aborting at %s line %d\n"),
1078 BFD_VERSION_STRING, file, line);
1079 (*_bfd_error_handler) (_("Please report this bug.\n"));
1080 _exit (EXIT_FAILURE);
1088 int bfd_get_arch_size (bfd *abfd);
1091 Returns the normalized architecture address size, in bits, as
1092 determined by the object file's format. By normalized, we mean
1093 either 32 or 64. For ELF, this information is included in the
1094 header. Use bfd_arch_bits_per_address for number of bits in
1095 the architecture address.
1098 Returns the arch size in bits if known, <<-1>> otherwise.
1102 bfd_get_arch_size (bfd *abfd)
1104 if (abfd->xvec->flavour == bfd_target_elf_flavour)
1105 return get_elf_backend_data (abfd)->s->arch_size;
1107 return bfd_arch_bits_per_address (abfd) > 32 ? 64 : 32;
1112 bfd_get_sign_extend_vma
1115 int bfd_get_sign_extend_vma (bfd *abfd);
1118 Indicates if the target architecture "naturally" sign extends
1119 an address. Some architectures implicitly sign extend address
1120 values when they are converted to types larger than the size
1121 of an address. For instance, bfd_get_start_address() will
1122 return an address sign extended to fill a bfd_vma when this is
1126 Returns <<1>> if the target architecture is known to sign
1127 extend addresses, <<0>> if the target architecture is known to
1128 not sign extend addresses, and <<-1>> otherwise.
1132 bfd_get_sign_extend_vma (bfd *abfd)
1136 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1137 return get_elf_backend_data (abfd)->sign_extend_vma;
1139 name = bfd_get_target (abfd);
1141 /* Return a proper value for DJGPP & PE COFF.
1142 This function is required for DWARF2 support, but there is
1143 no place to store this information in the COFF back end.
1144 Should enough other COFF targets add support for DWARF2,
1145 a place will have to be found. Until then, this hack will do. */
1146 if (CONST_STRNEQ (name, "coff-go32")
1147 || strcmp (name, "pe-i386") == 0
1148 || strcmp (name, "pei-i386") == 0
1149 || strcmp (name, "pe-x86-64") == 0
1150 || strcmp (name, "pei-x86-64") == 0
1151 || strcmp (name, "pe-arm-wince-little") == 0
1152 || strcmp (name, "pei-arm-wince-little") == 0
1153 || strcmp (name, "aixcoff-rs6000") == 0)
1156 if (CONST_STRNEQ (name, "mach-o"))
1159 bfd_set_error (bfd_error_wrong_format);
1165 bfd_set_start_address
1168 bfd_boolean bfd_set_start_address (bfd *abfd, bfd_vma vma);
1171 Make @var{vma} the entry point of output BFD @var{abfd}.
1174 Returns <<TRUE>> on success, <<FALSE>> otherwise.
1178 bfd_set_start_address (bfd *abfd, bfd_vma vma)
1180 abfd->start_address = vma;
1189 unsigned int bfd_get_gp_size (bfd *abfd);
1192 Return the maximum size of objects to be optimized using the GP
1193 register under MIPS ECOFF. This is typically set by the <<-G>>
1194 argument to the compiler, assembler or linker.
1198 bfd_get_gp_size (bfd *abfd)
1200 if (abfd->format == bfd_object)
1202 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1203 return ecoff_data (abfd)->gp_size;
1204 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1205 return elf_gp_size (abfd);
1215 void bfd_set_gp_size (bfd *abfd, unsigned int i);
1218 Set the maximum size of objects to be optimized using the GP
1219 register under ECOFF or MIPS ELF. This is typically set by
1220 the <<-G>> argument to the compiler, assembler or linker.
1224 bfd_set_gp_size (bfd *abfd, unsigned int i)
1226 /* Don't try to set GP size on an archive or core file! */
1227 if (abfd->format != bfd_object)
1230 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1231 ecoff_data (abfd)->gp_size = i;
1232 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1233 elf_gp_size (abfd) = i;
1236 /* Get the GP value. This is an internal function used by some of the
1237 relocation special_function routines on targets which support a GP
1241 _bfd_get_gp_value (bfd *abfd)
1245 if (abfd->format != bfd_object)
1248 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1249 return ecoff_data (abfd)->gp;
1250 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1251 return elf_gp (abfd);
1256 /* Set the GP value. */
1259 _bfd_set_gp_value (bfd *abfd, bfd_vma v)
1263 if (abfd->format != bfd_object)
1266 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1267 ecoff_data (abfd)->gp = v;
1268 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1277 bfd_vma bfd_scan_vma (const char *string, const char **end, int base);
1280 Convert, like <<strtoul>>, a numerical expression
1281 @var{string} into a <<bfd_vma>> integer, and return that integer.
1282 (Though without as many bells and whistles as <<strtoul>>.)
1283 The expression is assumed to be unsigned (i.e., positive).
1284 If given a @var{base}, it is used as the base for conversion.
1285 A base of 0 causes the function to interpret the string
1286 in hex if a leading "0x" or "0X" is found, otherwise
1287 in octal if a leading zero is found, otherwise in decimal.
1289 If the value would overflow, the maximum <<bfd_vma>> value is
1294 bfd_scan_vma (const char *string, const char **end, int base)
1298 unsigned int cutlim;
1301 /* Let the host do it if possible. */
1302 if (sizeof (bfd_vma) <= sizeof (unsigned long))
1303 return strtoul (string, (char **) end, base);
1305 #ifdef HAVE_STRTOULL
1306 if (sizeof (bfd_vma) <= sizeof (unsigned long long))
1307 return strtoull (string, (char **) end, base);
1312 if (string[0] == '0')
1314 if ((string[1] == 'x') || (string[1] == 'X'))
1321 if ((base < 2) || (base > 36))
1326 && (string[1] == 'x' || string[1] == 'X')
1327 && ISXDIGIT (string[2]))
1332 cutoff = (~ (bfd_vma) 0) / (bfd_vma) base;
1333 cutlim = (~ (bfd_vma) 0) % (bfd_vma) base;
1341 if (ISDIGIT (digit))
1342 digit = digit - '0';
1343 else if (ISALPHA (digit))
1344 digit = TOUPPER (digit) - 'A' + 10;
1347 if (digit >= (unsigned int) base)
1349 if (value > cutoff || (value == cutoff && digit > cutlim))
1351 value = value * base + digit;
1356 value = ~ (bfd_vma) 0;
1366 bfd_copy_private_header_data
1369 bfd_boolean bfd_copy_private_header_data (bfd *ibfd, bfd *obfd);
1372 Copy private BFD header information from the BFD @var{ibfd} to the
1373 the BFD @var{obfd}. This copies information that may require
1374 sections to exist, but does not require symbol tables. Return
1375 <<true>> on success, <<false>> on error.
1376 Possible error returns are:
1378 o <<bfd_error_no_memory>> -
1379 Not enough memory exists to create private data for @var{obfd}.
1381 .#define bfd_copy_private_header_data(ibfd, obfd) \
1382 . BFD_SEND (obfd, _bfd_copy_private_header_data, \
1389 bfd_copy_private_bfd_data
1392 bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd);
1395 Copy private BFD information from the BFD @var{ibfd} to the
1396 the BFD @var{obfd}. Return <<TRUE>> on success, <<FALSE>> on error.
1397 Possible error returns are:
1399 o <<bfd_error_no_memory>> -
1400 Not enough memory exists to create private data for @var{obfd}.
1402 .#define bfd_copy_private_bfd_data(ibfd, obfd) \
1403 . BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
1410 bfd_merge_private_bfd_data
1413 bfd_boolean bfd_merge_private_bfd_data (bfd *ibfd, bfd *obfd);
1416 Merge private BFD information from the BFD @var{ibfd} to the
1417 the output file BFD @var{obfd} when linking. Return <<TRUE>>
1418 on success, <<FALSE>> on error. Possible error returns are:
1420 o <<bfd_error_no_memory>> -
1421 Not enough memory exists to create private data for @var{obfd}.
1423 .#define bfd_merge_private_bfd_data(ibfd, obfd) \
1424 . BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
1431 bfd_set_private_flags
1434 bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags);
1437 Set private BFD flag information in the BFD @var{abfd}.
1438 Return <<TRUE>> on success, <<FALSE>> on error. Possible error
1441 o <<bfd_error_no_memory>> -
1442 Not enough memory exists to create private data for @var{obfd}.
1444 .#define bfd_set_private_flags(abfd, flags) \
1445 . BFD_SEND (abfd, _bfd_set_private_flags, (abfd, flags))
1454 The following functions exist but have not yet been documented.
1456 .#define bfd_sizeof_headers(abfd, info) \
1457 . BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, info))
1459 .#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
1460 . BFD_SEND (abfd, _bfd_find_nearest_line, \
1461 . (abfd, syms, sec, off, file, func, line, NULL))
1463 .#define bfd_find_nearest_line_discriminator(abfd, sec, syms, off, file, func, \
1465 . BFD_SEND (abfd, _bfd_find_nearest_line, \
1466 . (abfd, syms, sec, off, file, func, line, disc))
1468 .#define bfd_find_line(abfd, syms, sym, file, line) \
1469 . BFD_SEND (abfd, _bfd_find_line, \
1470 . (abfd, syms, sym, file, line))
1472 .#define bfd_find_inliner_info(abfd, file, func, line) \
1473 . BFD_SEND (abfd, _bfd_find_inliner_info, \
1474 . (abfd, file, func, line))
1476 .#define bfd_debug_info_start(abfd) \
1477 . BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
1479 .#define bfd_debug_info_end(abfd) \
1480 . BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
1482 .#define bfd_debug_info_accumulate(abfd, section) \
1483 . BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
1485 .#define bfd_stat_arch_elt(abfd, stat) \
1486 . BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
1488 .#define bfd_update_armap_timestamp(abfd) \
1489 . BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd))
1491 .#define bfd_set_arch_mach(abfd, arch, mach)\
1492 . BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
1494 .#define bfd_relax_section(abfd, section, link_info, again) \
1495 . BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again))
1497 .#define bfd_gc_sections(abfd, link_info) \
1498 . BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
1500 .#define bfd_lookup_section_flags(link_info, flag_info, section) \
1501 . BFD_SEND (abfd, _bfd_lookup_section_flags, (link_info, flag_info, section))
1503 .#define bfd_merge_sections(abfd, link_info) \
1504 . BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
1506 .#define bfd_is_group_section(abfd, sec) \
1507 . BFD_SEND (abfd, _bfd_is_group_section, (abfd, sec))
1509 .#define bfd_discard_group(abfd, sec) \
1510 . BFD_SEND (abfd, _bfd_discard_group, (abfd, sec))
1512 .#define bfd_link_hash_table_create(abfd) \
1513 . BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
1515 .#define bfd_link_add_symbols(abfd, info) \
1516 . BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
1518 .#define bfd_link_just_syms(abfd, sec, info) \
1519 . BFD_SEND (abfd, _bfd_link_just_syms, (sec, info))
1521 .#define bfd_final_link(abfd, info) \
1522 . BFD_SEND (abfd, _bfd_final_link, (abfd, info))
1524 .#define bfd_free_cached_info(abfd) \
1525 . BFD_SEND (abfd, _bfd_free_cached_info, (abfd))
1527 .#define bfd_get_dynamic_symtab_upper_bound(abfd) \
1528 . BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd))
1530 .#define bfd_print_private_bfd_data(abfd, file)\
1531 . BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file))
1533 .#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \
1534 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols))
1536 .#define bfd_get_synthetic_symtab(abfd, count, syms, dyncount, dynsyms, ret) \
1537 . BFD_SEND (abfd, _bfd_get_synthetic_symtab, (abfd, count, syms, \
1538 . dyncount, dynsyms, ret))
1540 .#define bfd_get_dynamic_reloc_upper_bound(abfd) \
1541 . BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd))
1543 .#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \
1544 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms))
1546 .extern bfd_byte *bfd_get_relocated_section_contents
1547 . (bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *,
1548 . bfd_boolean, asymbol **);
1554 bfd_get_relocated_section_contents (bfd *abfd,
1555 struct bfd_link_info *link_info,
1556 struct bfd_link_order *link_order,
1558 bfd_boolean relocatable,
1562 bfd_byte *(*fn) (bfd *, struct bfd_link_info *, struct bfd_link_order *,
1563 bfd_byte *, bfd_boolean, asymbol **);
1565 if (link_order->type == bfd_indirect_link_order)
1567 abfd2 = link_order->u.indirect.section->owner;
1574 fn = abfd2->xvec->_bfd_get_relocated_section_contents;
1576 return (*fn) (abfd, link_info, link_order, data, relocatable, symbols);
1579 /* Record information about an ELF program header. */
1582 bfd_record_phdr (bfd *abfd,
1584 bfd_boolean flags_valid,
1586 bfd_boolean at_valid,
1588 bfd_boolean includes_filehdr,
1589 bfd_boolean includes_phdrs,
1593 struct elf_segment_map *m, **pm;
1596 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
1599 amt = sizeof (struct elf_segment_map);
1600 amt += ((bfd_size_type) count - 1) * sizeof (asection *);
1601 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
1608 m->p_flags_valid = flags_valid;
1609 m->p_paddr_valid = at_valid;
1610 m->includes_filehdr = includes_filehdr;
1611 m->includes_phdrs = includes_phdrs;
1614 memcpy (m->sections, secs, count * sizeof (asection *));
1616 for (pm = &elf_seg_map (abfd); *pm != NULL; pm = &(*pm)->next)
1624 /* Return true iff this target is 32-bit. */
1629 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1631 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1632 return bed->s->elfclass == ELFCLASS32;
1635 /* For non-ELF targets, use architecture information. */
1636 return bfd_arch_bits_per_address (abfd) <= 32;
1640 /* bfd_sprintf_vma and bfd_fprintf_vma display an address in the
1641 target's address size. */
1644 bfd_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
1649 sprintf (buf, "%08lx", (unsigned long) value & 0xffffffff);
1653 sprintf_vma (buf, value);
1657 bfd_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
1662 fprintf ((FILE *) stream, "%08lx", (unsigned long) value & 0xffffffff);
1666 fprintf_vma ((FILE *) stream, value);
1674 bfd_boolean bfd_alt_mach_code (bfd *abfd, int alternative);
1678 When more than one machine code number is available for the
1679 same machine type, this function can be used to switch between
1680 the preferred one (alternative == 0) and any others. Currently,
1681 only ELF supports this feature, with up to two alternate
1686 bfd_alt_mach_code (bfd *abfd, int alternative)
1688 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1692 switch (alternative)
1695 code = get_elf_backend_data (abfd)->elf_machine_code;
1699 code = get_elf_backend_data (abfd)->elf_machine_alt1;
1705 code = get_elf_backend_data (abfd)->elf_machine_alt2;
1714 elf_elfheader (abfd)->e_machine = code;
1724 bfd_emul_get_maxpagesize
1727 bfd_vma bfd_emul_get_maxpagesize (const char *);
1730 Returns the maximum page size, in bytes, as determined by
1734 Returns the maximum page size in bytes for ELF, 0 otherwise.
1738 bfd_emul_get_maxpagesize (const char *emul)
1740 const bfd_target *target;
1742 target = bfd_find_target (emul, NULL);
1744 && target->flavour == bfd_target_elf_flavour)
1745 return xvec_get_elf_backend_data (target)->maxpagesize;
1751 bfd_elf_set_pagesize (const bfd_target *target, bfd_vma size,
1752 int offset, const bfd_target *orig_target)
1754 if (target->flavour == bfd_target_elf_flavour)
1756 const struct elf_backend_data *bed;
1758 bed = xvec_get_elf_backend_data (target);
1759 *((bfd_vma *) ((char *) bed + offset)) = size;
1762 if (target->alternative_target
1763 && target->alternative_target != orig_target)
1764 bfd_elf_set_pagesize (target->alternative_target, size, offset,
1770 bfd_emul_set_maxpagesize
1773 void bfd_emul_set_maxpagesize (const char *, bfd_vma);
1776 For ELF, set the maximum page size for the emulation. It is
1777 a no-op for other formats.
1782 bfd_emul_set_maxpagesize (const char *emul, bfd_vma size)
1784 const bfd_target *target;
1786 target = bfd_find_target (emul, NULL);
1788 bfd_elf_set_pagesize (target, size,
1789 offsetof (struct elf_backend_data,
1790 maxpagesize), target);
1795 bfd_emul_get_commonpagesize
1798 bfd_vma bfd_emul_get_commonpagesize (const char *);
1801 Returns the common page size, in bytes, as determined by
1805 Returns the common page size in bytes for ELF, 0 otherwise.
1809 bfd_emul_get_commonpagesize (const char *emul)
1811 const bfd_target *target;
1813 target = bfd_find_target (emul, NULL);
1815 && target->flavour == bfd_target_elf_flavour)
1816 return xvec_get_elf_backend_data (target)->commonpagesize;
1823 bfd_emul_set_commonpagesize
1826 void bfd_emul_set_commonpagesize (const char *, bfd_vma);
1829 For ELF, set the common page size for the emulation. It is
1830 a no-op for other formats.
1835 bfd_emul_set_commonpagesize (const char *emul, bfd_vma size)
1837 const bfd_target *target;
1839 target = bfd_find_target (emul, NULL);
1841 bfd_elf_set_pagesize (target, size,
1842 offsetof (struct elf_backend_data,
1843 commonpagesize), target);
1851 char *bfd_demangle (bfd *, const char *, int);
1854 Wrapper around cplus_demangle. Strips leading underscores and
1855 other such chars that would otherwise confuse the demangler.
1856 If passed a g++ v3 ABI mangled name, returns a buffer allocated
1857 with malloc holding the demangled name. Returns NULL otherwise
1858 and on memory alloc failure.
1862 bfd_demangle (bfd *abfd, const char *name, int options)
1865 const char *pre, *suf;
1867 bfd_boolean skip_lead;
1869 skip_lead = (abfd != NULL
1871 && bfd_get_symbol_leading_char (abfd) == *name);
1875 /* This is a hack for better error reporting on XCOFF, PowerPC64-ELF
1876 or the MS PE format. These formats have a number of leading '.'s
1877 on at least some symbols, so we remove all dots to avoid
1878 confusing the demangler. */
1880 while (*name == '.' || *name == '$')
1882 pre_len = name - pre;
1884 /* Strip off @plt and suchlike too. */
1886 suf = strchr (name, '@');
1889 alloc = (char *) bfd_malloc (suf - name + 1);
1892 memcpy (alloc, name, suf - name);
1893 alloc[suf - name] = '\0';
1897 res = cplus_demangle (name, options);
1906 size_t len = strlen (pre) + 1;
1907 alloc = (char *) bfd_malloc (len);
1910 memcpy (alloc, pre, len);
1916 /* Put back any prefix or suffix. */
1917 if (pre_len != 0 || suf != NULL)
1926 suf_len = strlen (suf) + 1;
1927 final = (char *) bfd_malloc (pre_len + len + suf_len);
1930 memcpy (final, pre, pre_len);
1931 memcpy (final + pre_len, res, len);
1932 memcpy (final + pre_len + len, suf, suf_len);