1 /* Generic BFD library interface and support routines.
2 Copyright (C) 1990-2017 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_unknown = 0,
62 . {* The filename the application opened the BFD with. *}
63 . const char *filename;
65 . {* A pointer to the target jump table. *}
66 . const struct bfd_target *xvec;
68 . {* The IOSTREAM, and corresponding IO vector that provide access
69 . to the file backing the BFD. *}
71 . const struct bfd_iovec *iovec;
73 . {* The caching routines use these to maintain a
74 . least-recently-used list of BFDs. *}
75 . struct bfd *lru_prev, *lru_next;
77 . {* When a file is closed by the caching routines, BFD retains
78 . state information on the file here... *}
81 . {* File modified time, if mtime_set is TRUE. *}
84 . {* A unique identifier of the BFD *}
87 . {* The format which belongs to the BFD. (object, core, etc.) *}
88 . ENUM_BITFIELD (bfd_format) format : 3;
90 . {* The direction with which the BFD was opened. *}
91 . ENUM_BITFIELD (bfd_direction) direction : 2;
93 . {* Format_specific flags. *}
94 . flagword flags : 20;
96 . {* Values that may appear in the flags field of a BFD. These also
97 . appear in the object_flags field of the bfd_target structure, where
98 . they indicate the set of flags used by that backend (not all flags
99 . are meaningful for all object file formats) (FIXME: at the moment,
100 . the object_flags values have mostly just been copied from backend
101 . to another, and are not necessarily correct). *}
103 .#define BFD_NO_FLAGS 0x00
105 . {* BFD contains relocation entries. *}
106 .#define HAS_RELOC 0x01
108 . {* BFD is directly executable. *}
111 . {* BFD has line number information (basically used for F_LNNO in a
113 .#define HAS_LINENO 0x04
115 . {* BFD has debugging information. *}
116 .#define HAS_DEBUG 0x08
118 . {* BFD has symbols. *}
119 .#define HAS_SYMS 0x10
121 . {* BFD has local symbols (basically used for F_LSYMS in a COFF
123 .#define HAS_LOCALS 0x20
125 . {* BFD is a dynamic object. *}
126 .#define DYNAMIC 0x40
128 . {* Text section is write protected (if D_PAGED is not set, this is
129 . like an a.out NMAGIC file) (the linker sets this by default, but
130 . clears it for -r or -N). *}
131 .#define WP_TEXT 0x80
133 . {* BFD is dynamically paged (this is like an a.out ZMAGIC file) (the
134 . linker sets this by default, but clears it for -r or -n or -N). *}
135 .#define D_PAGED 0x100
137 . {* BFD is relaxable (this means that bfd_relax_section may be able to
138 . do something) (sometimes bfd_relax_section can do something even if
139 . this is not set). *}
140 .#define BFD_IS_RELAXABLE 0x200
142 . {* This may be set before writing out a BFD to request using a
143 . traditional format. For example, this is used to request that when
144 . writing out an a.out object the symbols not be hashed to eliminate
146 .#define BFD_TRADITIONAL_FORMAT 0x400
148 . {* This flag indicates that the BFD contents are actually cached
149 . in memory. If this is set, iostream points to a bfd_in_memory
151 .#define BFD_IN_MEMORY 0x800
153 . {* This BFD has been created by the linker and doesn't correspond
154 . to any input file. *}
155 .#define BFD_LINKER_CREATED 0x1000
157 . {* This may be set before writing out a BFD to request that it
158 . be written using values for UIDs, GIDs, timestamps, etc. that
159 . will be consistent from run to run. *}
160 .#define BFD_DETERMINISTIC_OUTPUT 0x2000
162 . {* Compress sections in this BFD. *}
163 .#define BFD_COMPRESS 0x4000
165 . {* Decompress sections in this BFD. *}
166 .#define BFD_DECOMPRESS 0x8000
168 . {* BFD is a dummy, for plugins. *}
169 .#define BFD_PLUGIN 0x10000
171 . {* Compress sections in this BFD with SHF_COMPRESSED from gABI. *}
172 .#define BFD_COMPRESS_GABI 0x20000
174 . {* Convert ELF common symbol type to STT_COMMON or STT_OBJECT in this
176 .#define BFD_CONVERT_ELF_COMMON 0x40000
178 . {* Use the ELF STT_COMMON type in this BFD. *}
179 .#define BFD_USE_ELF_STT_COMMON 0x80000
181 . {* Flags bits to be saved in bfd_preserve_save. *}
182 .#define BFD_FLAGS_SAVED \
183 . (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
184 . | BFD_PLUGIN | BFD_COMPRESS_GABI | BFD_CONVERT_ELF_COMMON \
185 . | BFD_USE_ELF_STT_COMMON)
187 . {* Flags bits which are for BFD use only. *}
188 .#define BFD_FLAGS_FOR_BFD_USE_MASK \
189 . (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
190 . | BFD_PLUGIN | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT \
191 . | BFD_COMPRESS_GABI | BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON)
193 . {* Is the file descriptor being cached? That is, can it be closed as
194 . needed, and re-opened when accessed later? *}
195 . unsigned int cacheable : 1;
197 . {* Marks whether there was a default target specified when the
198 . BFD was opened. This is used to select which matching algorithm
199 . to use to choose the back end. *}
200 . unsigned int target_defaulted : 1;
202 . {* ... and here: (``once'' means at least once). *}
203 . unsigned int opened_once : 1;
205 . {* Set if we have a locally maintained mtime value, rather than
206 . getting it from the file each time. *}
207 . unsigned int mtime_set : 1;
209 . {* Flag set if symbols from this BFD should not be exported. *}
210 . unsigned int no_export : 1;
212 . {* Remember when output has begun, to stop strange things
214 . unsigned int output_has_begun : 1;
216 . {* Have archive map. *}
217 . unsigned int has_armap : 1;
219 . {* Set if this is a thin archive. *}
220 . unsigned int is_thin_archive : 1;
222 . {* Set if only required symbols should be added in the link hash table for
223 . this object. Used by VMS linkers. *}
224 . unsigned int selective_search : 1;
226 . {* Set if this is the linker output BFD. *}
227 . unsigned int is_linker_output : 1;
229 . {* Set if this is the linker input BFD. *}
230 . unsigned int is_linker_input : 1;
232 . {* If this is an input for a compiler plug-in library. *}
233 . ENUM_BITFIELD (bfd_plugin_format) plugin_format : 2;
235 . {* Set if this is a plugin output file. *}
236 . unsigned int lto_output : 1;
238 . {* Set to dummy BFD created when claimed by a compiler plug-in
240 . bfd *plugin_dummy_bfd;
242 . {* Currently my_archive is tested before adding origin to
243 . anything. I believe that this can become always an add of
244 . origin, with origin set to 0 for non archive files. *}
247 . {* The origin in the archive of the proxy entry. This will
248 . normally be the same as origin, except for thin archives,
249 . when it will contain the current offset of the proxy in the
250 . thin archive rather than the offset of the bfd in its actual
252 . ufile_ptr proxy_origin;
254 . {* A hash table for section names. *}
255 . struct bfd_hash_table section_htab;
257 . {* Pointer to linked list of sections. *}
258 . struct bfd_section *sections;
260 . {* The last section on the section list. *}
261 . struct bfd_section *section_last;
263 . {* The number of sections. *}
264 . unsigned int section_count;
266 . {* A field used by _bfd_generic_link_add_archive_symbols. This will
267 . be used only for archive elements. *}
270 . {* Stuff only useful for object files:
271 . The start address. *}
272 . bfd_vma start_address;
274 . {* Symbol table for output BFD (with symcount entries).
275 . Also used by the linker to cache input BFD symbols. *}
276 . struct bfd_symbol **outsymbols;
278 . {* Used for input and output. *}
279 . unsigned int symcount;
281 . {* Used for slurped dynamic symbol tables. *}
282 . unsigned int dynsymcount;
284 . {* Pointer to structure which contains architecture information. *}
285 . const struct bfd_arch_info *arch_info;
287 . {* Stuff only useful for archives. *}
289 . struct bfd *my_archive; {* The containing archive BFD. *}
290 . struct bfd *archive_next; {* The next BFD in the archive. *}
291 . struct bfd *archive_head; {* The first BFD in the archive. *}
292 . struct bfd *nested_archives; {* List of nested archive in a flattened
296 . {* For input BFDs, a chain of BFDs involved in a link. *}
298 . {* For output BFD, the linker hash table. *}
299 . struct bfd_link_hash_table *hash;
302 . {* Used by the back end to hold private data. *}
305 . struct aout_data_struct *aout_data;
306 . struct artdata *aout_ar_data;
307 . struct _oasys_data *oasys_obj_data;
308 . struct _oasys_ar_data *oasys_ar_data;
309 . struct coff_tdata *coff_obj_data;
310 . struct pe_tdata *pe_obj_data;
311 . struct xcoff_tdata *xcoff_obj_data;
312 . struct ecoff_tdata *ecoff_obj_data;
313 . struct ieee_data_struct *ieee_data;
314 . struct ieee_ar_data_struct *ieee_ar_data;
315 . struct srec_data_struct *srec_data;
316 . struct verilog_data_struct *verilog_data;
317 . struct ihex_data_struct *ihex_data;
318 . struct tekhex_data_struct *tekhex_data;
319 . struct elf_obj_tdata *elf_obj_data;
320 . struct nlm_obj_tdata *nlm_obj_data;
321 . struct bout_data_struct *bout_data;
322 . struct mmo_data_struct *mmo_data;
323 . struct sun_core_struct *sun_core_data;
324 . struct sco5_core_struct *sco5_core_data;
325 . struct trad_core_struct *trad_core_data;
326 . struct som_data_struct *som_data;
327 . struct hpux_core_struct *hpux_core_data;
328 . struct hppabsd_core_struct *hppabsd_core_data;
329 . struct sgi_core_struct *sgi_core_data;
330 . struct lynx_core_struct *lynx_core_data;
331 . struct osf_core_struct *osf_core_data;
332 . struct cisco_core_struct *cisco_core_data;
333 . struct versados_data_struct *versados_data;
334 . struct netbsd_core_struct *netbsd_core_data;
335 . struct mach_o_data_struct *mach_o_data;
336 . struct mach_o_fat_data_struct *mach_o_fat_data;
337 . struct plugin_data_struct *plugin_data;
338 . struct bfd_pef_data_struct *pef_data;
339 . struct bfd_pef_xlib_data_struct *pef_xlib_data;
340 . struct bfd_sym_data_struct *sym_data;
345 . {* Used by the application to hold private data. *}
348 . {* Where all the allocated stuff under this BFD goes. This is a
349 . struct objalloc *, but we use void * to avoid requiring the inclusion
353 . {* For input BFDs, the build ID, if the object has one. *}
354 . const struct bfd_build_id *build_id;
357 .{* See note beside bfd_set_section_userdata. *}
358 .static inline bfd_boolean
359 .bfd_set_cacheable (bfd * abfd, bfd_boolean val)
361 . abfd->cacheable = val;
371 #include "libiberty.h"
372 #include "demangle.h"
373 #include "safe-ctype.h"
376 #include "coff/internal.h"
377 #include "coff/sym.h"
379 #include "libecoff.h"
384 #define EXIT_FAILURE 1
388 /* provide storage for subsystem, stack and heap data which may have been
389 passed in on the command line. Ld puts this data into a bfd_link_info
390 struct which ultimately gets passed in to the bfd. When it arrives, copy
391 it to the following struct so that the data will be available in coffcode.h
392 where it is needed. The typedef's used are defined in bfd.h */
396 Error reporting, Miscellaneous, typedef bfd, BFD front end
401 Most BFD functions return nonzero on success (check their
402 individual documentation for precise semantics). On an error,
403 they call <<bfd_set_error>> to set an error condition that callers
404 can check by calling <<bfd_get_error>>.
405 If that returns <<bfd_error_system_call>>, then check
408 The easiest way to report a BFD error to the user is to
412 Type <<bfd_error_type>>
414 The values returned by <<bfd_get_error>> are defined by the
415 enumerated type <<bfd_error_type>>.
419 .typedef enum bfd_error
421 . bfd_error_no_error = 0,
422 . bfd_error_system_call,
423 . bfd_error_invalid_target,
424 . bfd_error_wrong_format,
425 . bfd_error_wrong_object_format,
426 . bfd_error_invalid_operation,
427 . bfd_error_no_memory,
428 . bfd_error_no_symbols,
429 . bfd_error_no_armap,
430 . bfd_error_no_more_archived_files,
431 . bfd_error_malformed_archive,
432 . bfd_error_missing_dso,
433 . bfd_error_file_not_recognized,
434 . bfd_error_file_ambiguously_recognized,
435 . bfd_error_no_contents,
436 . bfd_error_nonrepresentable_section,
437 . bfd_error_no_debug_section,
438 . bfd_error_bad_value,
439 . bfd_error_file_truncated,
440 . bfd_error_file_too_big,
441 . bfd_error_on_input,
442 . bfd_error_invalid_error_code
448 static bfd_error_type bfd_error = bfd_error_no_error;
449 static bfd *input_bfd = NULL;
450 static bfd_error_type input_error = bfd_error_no_error;
452 const char *const bfd_errmsgs[] =
455 N_("System call error"),
456 N_("Invalid bfd target"),
457 N_("File in wrong format"),
458 N_("Archive object file in wrong format"),
459 N_("Invalid operation"),
460 N_("Memory exhausted"),
462 N_("Archive has no index; run ranlib to add one"),
463 N_("No more archived files"),
464 N_("Malformed archive"),
465 N_("DSO missing from command line"),
466 N_("File format not recognized"),
467 N_("File format is ambiguous"),
468 N_("Section has no contents"),
469 N_("Nonrepresentable section on output"),
470 N_("Symbol needs debug section which does not exist"),
472 N_("File truncated"),
474 N_("Error reading %s: %s"),
475 N_("#<Invalid error code>")
483 bfd_error_type bfd_get_error (void);
486 Return the current BFD error condition.
500 void bfd_set_error (bfd_error_type error_tag);
503 Set the BFD error condition to be @var{error_tag}.
505 @var{error_tag} must not be bfd_error_on_input. Use
506 bfd_set_input_error for input errors instead.
510 bfd_set_error (bfd_error_type error_tag)
512 bfd_error = error_tag;
513 if (bfd_error >= bfd_error_on_input)
522 void bfd_set_input_error (bfd *input, bfd_error_type error_tag);
526 Set the BFD error condition to be bfd_error_on_input.
527 @var{input} is the input bfd where the error occurred, and
528 @var{error_tag} the bfd_error_type error.
532 bfd_set_input_error (bfd *input, bfd_error_type error_tag)
534 /* This is an error that occurred during bfd_close when writing an
535 archive, but on one of the input files. */
536 bfd_error = bfd_error_on_input;
538 input_error = error_tag;
539 if (input_error >= bfd_error_on_input)
548 const char *bfd_errmsg (bfd_error_type error_tag);
551 Return a string describing the error @var{error_tag}, or
552 the system error if @var{error_tag} is <<bfd_error_system_call>>.
556 bfd_errmsg (bfd_error_type error_tag)
561 if (error_tag == bfd_error_on_input)
564 const char *msg = bfd_errmsg (input_error);
566 if (asprintf (&buf, _(bfd_errmsgs [error_tag]), input_bfd->filename, msg)
570 /* Ick, what to do on out of memory? */
574 if (error_tag == bfd_error_system_call)
575 return xstrerror (errno);
577 if (error_tag > bfd_error_invalid_error_code)
578 error_tag = bfd_error_invalid_error_code; /* sanity check */
580 return _(bfd_errmsgs [error_tag]);
588 void bfd_perror (const char *message);
591 Print to the standard error stream a string describing the
592 last BFD error that occurred, or the last system error if
593 the last BFD error was a system call failure. If @var{message}
594 is non-NULL and non-empty, the error string printed is preceded
595 by @var{message}, a colon, and a space. It is followed by a newline.
599 bfd_perror (const char *message)
602 if (message == NULL || *message == '\0')
603 fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ()));
605 fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ()));
613 Some BFD functions want to print messages describing the
614 problem. They call a BFD error handler function. This
615 function may be overridden by the program.
617 The BFD error handler acts like vprintf.
621 .typedef void (*bfd_error_handler_type) (const char *, va_list);
625 /* The program name used when printing BFD error messages. */
627 static const char *_bfd_error_program_name;
629 /* This macro and _bfd_doprnt (originally _doprint) taken from
630 libiberty _doprnt.c, tidied a little and extended to handle '%A'
631 and '%B'. 'L' as a modifer for integer formats is used for bfd_vma
632 and bfd_size_type args, which vary in size depending on BFD
635 #define PRINT_TYPE(TYPE) \
638 TYPE value = va_arg (ap, TYPE); \
639 result = fprintf (stream, specifier, value); \
643 _bfd_doprnt (FILE *stream, const char *format, va_list ap)
645 const char *ptr = format;
647 int total_printed = 0;
655 /* While we have regular characters, print them. */
656 char *end = strchr (ptr, '%');
658 result = fprintf (stream, "%.*s", (int) (end - ptr), ptr);
660 result = fprintf (stream, "%s", ptr);
665 /* We have a format specifier! */
666 char *sptr = specifier;
667 int wide_width = 0, short_width = 0;
669 /* Copy the % and move forward. */
672 /* Move past flags. */
673 while (strchr ("-+ #0", *ptr))
678 int value = abs (va_arg (ap, int));
679 sptr += sprintf (sptr, "%d", value);
683 /* Handle explicit numeric value. */
684 while (ISDIGIT (*ptr))
689 /* Copy and go past the period. */
693 int value = abs (va_arg (ap, int));
694 sptr += sprintf (sptr, "%d", value);
698 /* Handle explicit numeric value. */
699 while (ISDIGIT (*ptr))
702 while (strchr ("hlL", *ptr))
721 /* Copy the type specifier, and NULL terminate. */
735 /* Short values are promoted to int, so just copy it
736 as an int and trust the C library printf to cast it
737 to the right width. */
742 /* L modifier for bfd_vma or bfd_size_type may be
743 either long long or long. */
747 if (BFD_ARCH_SIZE < 64 || BFD_HOST_64BIT_LONG)
767 #if defined (__MSVCRT__)
774 #if defined (__GNUC__) || defined (HAVE_LONG_LONG)
775 PRINT_TYPE (long long);
777 /* Fake it and hope for the best. */
795 #if defined (__GNUC__) || defined (HAVE_LONG_DOUBLE)
796 PRINT_TYPE (long double);
798 /* Fake it and hope for the best. */
816 asection *sec = va_arg (ap, asection *);
818 const char *group = NULL;
819 struct coff_comdat_info *ci;
822 /* Invoking %A with a null section pointer is an
827 && bfd_get_flavour (abfd) == bfd_target_elf_flavour
828 && elf_next_in_group (sec) != NULL
829 && (sec->flags & SEC_GROUP) == 0)
830 group = elf_group_name (sec);
831 else if (abfd != NULL
832 && bfd_get_flavour (abfd) == bfd_target_coff_flavour
833 && (ci = bfd_coff_get_comdat_section (sec->owner,
837 result = fprintf (stream, "%s[%s]", sec->name, group);
839 result = fprintf (stream, "%s", sec->name);
844 bfd *abfd = va_arg (ap, bfd *);
847 /* Invoking %B with a null bfd pointer is an
850 else if (abfd->my_archive
851 && !bfd_is_thin_archive (abfd->my_archive))
852 result = fprintf (stream, "%s(%s)",
853 abfd->my_archive->filename, abfd->filename);
855 result = fprintf (stream, "%s", abfd->filename);
864 total_printed += result;
867 return total_printed;
870 /* This is the default routine to handle BFD error messages.
871 Like fprintf (stderr, ...), but also handles some extra format specifiers.
873 %A section name from section. For group components, print group name too.
874 %B file name from bfd. For archive components, prints archive too. */
877 error_handler_internal (const char *fmt, va_list ap)
879 /* PR 4992: Don't interrupt output being sent to stdout. */
882 if (_bfd_error_program_name != NULL)
883 fprintf (stderr, "%s: ", _bfd_error_program_name);
885 fprintf (stderr, "BFD: ");
887 _bfd_doprnt (stderr, fmt, ap);
889 /* On AIX, putc is implemented as a macro that triggers a -Wunused-value
890 warning, so use the fputc function to avoid it. */
891 fputc ('\n', stderr);
895 /* This is a function pointer to the routine which should handle BFD
896 error messages. It is called when a BFD routine encounters an
897 error for which it wants to print a message. Going through a
898 function pointer permits a program linked against BFD to intercept
899 the messages and deal with them itself. */
901 static bfd_error_handler_type _bfd_error_internal = error_handler_internal;
904 _bfd_error_handler (const char *fmt, ...)
909 _bfd_error_internal (fmt, ap);
915 bfd_set_error_handler
918 bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type);
921 Set the BFD error handler function. Returns the previous
925 bfd_error_handler_type
926 bfd_set_error_handler (bfd_error_handler_type pnew)
928 bfd_error_handler_type pold;
930 pold = _bfd_error_internal;
931 _bfd_error_internal = pnew;
937 bfd_set_error_program_name
940 void bfd_set_error_program_name (const char *);
943 Set the program name to use when printing a BFD error. This
944 is printed before the error message followed by a colon and
945 space. The string must not be changed after it is passed to
950 bfd_set_error_program_name (const char *name)
952 _bfd_error_program_name = name;
959 If BFD finds an internal inconsistency, the bfd assert
960 handler is called with information on the BFD version, BFD
961 source file and line. If this happens, most programs linked
962 against BFD are expected to want to exit with an error, or mark
963 the current BFD operation as failed, so it is recommended to
964 override the default handler, which just calls
965 _bfd_error_handler and continues.
969 .typedef void (*bfd_assert_handler_type) (const char *bfd_formatmsg,
970 . const char *bfd_version,
971 . const char *bfd_file,
976 /* Note the use of bfd_ prefix on the parameter names above: we want to
977 show which one is the message and which is the version by naming the
978 parameters, but avoid polluting the program-using-bfd namespace as
979 the typedef is visible in the exported headers that the program
980 includes. Below, it's just for consistency. */
983 _bfd_default_assert_handler (const char *bfd_formatmsg,
984 const char *bfd_version,
985 const char *bfd_file,
989 _bfd_error_handler (bfd_formatmsg, bfd_version, bfd_file, bfd_line);
992 /* Similar to _bfd_error_handler, a program can decide to exit on an
993 internal BFD error. We use a non-variadic type to simplify passing
994 on parameters to other functions, e.g. _bfd_error_handler. */
996 static bfd_assert_handler_type _bfd_assert_handler = _bfd_default_assert_handler;
1000 bfd_set_assert_handler
1003 bfd_assert_handler_type bfd_set_assert_handler (bfd_assert_handler_type);
1006 Set the BFD assert handler function. Returns the previous
1010 bfd_assert_handler_type
1011 bfd_set_assert_handler (bfd_assert_handler_type pnew)
1013 bfd_assert_handler_type pold;
1015 pold = _bfd_assert_handler;
1016 _bfd_assert_handler = pnew;
1022 Miscellaneous, Memory Usage, Error reporting, BFD front end
1028 Miscellaneous functions
1033 bfd_get_reloc_upper_bound
1036 long bfd_get_reloc_upper_bound (bfd *abfd, asection *sect);
1039 Return the number of bytes required to store the
1040 relocation information associated with section @var{sect}
1041 attached to bfd @var{abfd}. If an error occurs, return -1.
1046 bfd_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
1048 if (abfd->format != bfd_object)
1050 bfd_set_error (bfd_error_invalid_operation);
1054 return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
1059 bfd_canonicalize_reloc
1062 long bfd_canonicalize_reloc
1063 (bfd *abfd, asection *sec, arelent **loc, asymbol **syms);
1066 Call the back end associated with the open BFD
1067 @var{abfd} and translate the external form of the relocation
1068 information attached to @var{sec} into the internal canonical
1069 form. Place the table into memory at @var{loc}, which has
1070 been preallocated, usually by a call to
1071 <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or
1074 The @var{syms} table is also needed for horrible internal magic
1079 bfd_canonicalize_reloc (bfd *abfd,
1084 if (abfd->format != bfd_object)
1086 bfd_set_error (bfd_error_invalid_operation);
1090 return BFD_SEND (abfd, _bfd_canonicalize_reloc,
1091 (abfd, asect, location, symbols));
1100 (bfd *abfd, asection *sec, arelent **rel, unsigned int count);
1103 Set the relocation pointer and count within
1104 section @var{sec} to the values @var{rel} and @var{count}.
1105 The argument @var{abfd} is ignored.
1107 .#define bfd_set_reloc(abfd, asect, location, count) \
1108 . BFD_SEND (abfd, _bfd_set_reloc, (abfd, asect, location, count))
1116 bfd_boolean bfd_set_file_flags (bfd *abfd, flagword flags);
1119 Set the flag word in the BFD @var{abfd} to the value @var{flags}.
1121 Possible errors are:
1122 o <<bfd_error_wrong_format>> - The target bfd was not of object format.
1123 o <<bfd_error_invalid_operation>> - The target bfd was open for reading.
1124 o <<bfd_error_invalid_operation>> -
1125 The flag word contained a bit which was not applicable to the
1126 type of file. E.g., an attempt was made to set the <<D_PAGED>> bit
1127 on a BFD format which does not support demand paging.
1132 bfd_set_file_flags (bfd *abfd, flagword flags)
1134 if (abfd->format != bfd_object)
1136 bfd_set_error (bfd_error_wrong_format);
1140 if (bfd_read_p (abfd))
1142 bfd_set_error (bfd_error_invalid_operation);
1146 bfd_get_file_flags (abfd) = flags;
1147 if ((flags & bfd_applicable_file_flags (abfd)) != flags)
1149 bfd_set_error (bfd_error_invalid_operation);
1157 bfd_assert (const char *file, int line)
1159 /* xgettext:c-format */
1160 (*_bfd_assert_handler) (_("BFD %s assertion fail %s:%d"),
1161 BFD_VERSION_STRING, file, line);
1164 /* A more or less friendly abort message. In libbfd.h abort is
1165 defined to call this function. */
1168 _bfd_abort (const char *file, int line, const char *fn)
1172 /* xgettext:c-format */
1173 (_("BFD %s internal error, aborting at %s:%d in %s\n"),
1174 BFD_VERSION_STRING, file, line, fn);
1177 /* xgettext:c-format */
1178 (_("BFD %s internal error, aborting at %s:%d\n"),
1179 BFD_VERSION_STRING, file, line);
1180 _bfd_error_handler (_("Please report this bug.\n"));
1181 _exit (EXIT_FAILURE);
1189 int bfd_get_arch_size (bfd *abfd);
1192 Returns the normalized architecture address size, in bits, as
1193 determined by the object file's format. By normalized, we mean
1194 either 32 or 64. For ELF, this information is included in the
1195 header. Use bfd_arch_bits_per_address for number of bits in
1196 the architecture address.
1199 Returns the arch size in bits if known, <<-1>> otherwise.
1203 bfd_get_arch_size (bfd *abfd)
1205 if (abfd->xvec->flavour == bfd_target_elf_flavour)
1206 return get_elf_backend_data (abfd)->s->arch_size;
1208 return bfd_arch_bits_per_address (abfd) > 32 ? 64 : 32;
1213 bfd_get_sign_extend_vma
1216 int bfd_get_sign_extend_vma (bfd *abfd);
1219 Indicates if the target architecture "naturally" sign extends
1220 an address. Some architectures implicitly sign extend address
1221 values when they are converted to types larger than the size
1222 of an address. For instance, bfd_get_start_address() will
1223 return an address sign extended to fill a bfd_vma when this is
1227 Returns <<1>> if the target architecture is known to sign
1228 extend addresses, <<0>> if the target architecture is known to
1229 not sign extend addresses, and <<-1>> otherwise.
1233 bfd_get_sign_extend_vma (bfd *abfd)
1237 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1238 return get_elf_backend_data (abfd)->sign_extend_vma;
1240 name = bfd_get_target (abfd);
1242 /* Return a proper value for DJGPP & PE COFF.
1243 This function is required for DWARF2 support, but there is
1244 no place to store this information in the COFF back end.
1245 Should enough other COFF targets add support for DWARF2,
1246 a place will have to be found. Until then, this hack will do. */
1247 if (CONST_STRNEQ (name, "coff-go32")
1248 || strcmp (name, "pe-i386") == 0
1249 || strcmp (name, "pei-i386") == 0
1250 || strcmp (name, "pe-x86-64") == 0
1251 || strcmp (name, "pei-x86-64") == 0
1252 || strcmp (name, "pe-arm-wince-little") == 0
1253 || strcmp (name, "pei-arm-wince-little") == 0
1254 || strcmp (name, "aixcoff-rs6000") == 0)
1257 if (CONST_STRNEQ (name, "mach-o"))
1260 bfd_set_error (bfd_error_wrong_format);
1266 bfd_set_start_address
1269 bfd_boolean bfd_set_start_address (bfd *abfd, bfd_vma vma);
1272 Make @var{vma} the entry point of output BFD @var{abfd}.
1275 Returns <<TRUE>> on success, <<FALSE>> otherwise.
1279 bfd_set_start_address (bfd *abfd, bfd_vma vma)
1281 abfd->start_address = vma;
1290 unsigned int bfd_get_gp_size (bfd *abfd);
1293 Return the maximum size of objects to be optimized using the GP
1294 register under MIPS ECOFF. This is typically set by the <<-G>>
1295 argument to the compiler, assembler or linker.
1299 bfd_get_gp_size (bfd *abfd)
1301 if (abfd->format == bfd_object)
1303 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1304 return ecoff_data (abfd)->gp_size;
1305 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1306 return elf_gp_size (abfd);
1316 void bfd_set_gp_size (bfd *abfd, unsigned int i);
1319 Set the maximum size of objects to be optimized using the GP
1320 register under ECOFF or MIPS ELF. This is typically set by
1321 the <<-G>> argument to the compiler, assembler or linker.
1325 bfd_set_gp_size (bfd *abfd, unsigned int i)
1327 /* Don't try to set GP size on an archive or core file! */
1328 if (abfd->format != bfd_object)
1331 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1332 ecoff_data (abfd)->gp_size = i;
1333 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1334 elf_gp_size (abfd) = i;
1337 /* Get the GP value. This is an internal function used by some of the
1338 relocation special_function routines on targets which support a GP
1342 _bfd_get_gp_value (bfd *abfd)
1346 if (abfd->format != bfd_object)
1349 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1350 return ecoff_data (abfd)->gp;
1351 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1352 return elf_gp (abfd);
1357 /* Set the GP value. */
1360 _bfd_set_gp_value (bfd *abfd, bfd_vma v)
1364 if (abfd->format != bfd_object)
1367 if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
1368 ecoff_data (abfd)->gp = v;
1369 else if (abfd->xvec->flavour == bfd_target_elf_flavour)
1378 bfd_vma bfd_scan_vma (const char *string, const char **end, int base);
1381 Convert, like <<strtoul>>, a numerical expression
1382 @var{string} into a <<bfd_vma>> integer, and return that integer.
1383 (Though without as many bells and whistles as <<strtoul>>.)
1384 The expression is assumed to be unsigned (i.e., positive).
1385 If given a @var{base}, it is used as the base for conversion.
1386 A base of 0 causes the function to interpret the string
1387 in hex if a leading "0x" or "0X" is found, otherwise
1388 in octal if a leading zero is found, otherwise in decimal.
1390 If the value would overflow, the maximum <<bfd_vma>> value is
1395 bfd_scan_vma (const char *string, const char **end, int base)
1399 unsigned int cutlim;
1402 /* Let the host do it if possible. */
1403 if (sizeof (bfd_vma) <= sizeof (unsigned long))
1404 return strtoul (string, (char **) end, base);
1406 #if defined (HAVE_STRTOULL) && defined (HAVE_LONG_LONG)
1407 if (sizeof (bfd_vma) <= sizeof (unsigned long long))
1408 return strtoull (string, (char **) end, base);
1413 if (string[0] == '0')
1415 if ((string[1] == 'x') || (string[1] == 'X'))
1422 if ((base < 2) || (base > 36))
1427 && (string[1] == 'x' || string[1] == 'X')
1428 && ISXDIGIT (string[2]))
1433 cutoff = (~ (bfd_vma) 0) / (bfd_vma) base;
1434 cutlim = (~ (bfd_vma) 0) % (bfd_vma) base;
1442 if (ISDIGIT (digit))
1443 digit = digit - '0';
1444 else if (ISALPHA (digit))
1445 digit = TOUPPER (digit) - 'A' + 10;
1448 if (digit >= (unsigned int) base)
1450 if (value > cutoff || (value == cutoff && digit > cutlim))
1452 value = value * base + digit;
1457 value = ~ (bfd_vma) 0;
1467 bfd_copy_private_header_data
1470 bfd_boolean bfd_copy_private_header_data (bfd *ibfd, bfd *obfd);
1473 Copy private BFD header information from the BFD @var{ibfd} to the
1474 the BFD @var{obfd}. This copies information that may require
1475 sections to exist, but does not require symbol tables. Return
1476 <<true>> on success, <<false>> on error.
1477 Possible error returns are:
1479 o <<bfd_error_no_memory>> -
1480 Not enough memory exists to create private data for @var{obfd}.
1482 .#define bfd_copy_private_header_data(ibfd, obfd) \
1483 . BFD_SEND (obfd, _bfd_copy_private_header_data, \
1490 bfd_copy_private_bfd_data
1493 bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd);
1496 Copy private BFD information from the BFD @var{ibfd} to the
1497 the BFD @var{obfd}. Return <<TRUE>> on success, <<FALSE>> on error.
1498 Possible error returns are:
1500 o <<bfd_error_no_memory>> -
1501 Not enough memory exists to create private data for @var{obfd}.
1503 .#define bfd_copy_private_bfd_data(ibfd, obfd) \
1504 . BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
1511 bfd_set_private_flags
1514 bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags);
1517 Set private BFD flag information in the BFD @var{abfd}.
1518 Return <<TRUE>> on success, <<FALSE>> on error. Possible error
1521 o <<bfd_error_no_memory>> -
1522 Not enough memory exists to create private data for @var{obfd}.
1524 .#define bfd_set_private_flags(abfd, flags) \
1525 . BFD_SEND (abfd, _bfd_set_private_flags, (abfd, flags))
1534 The following functions exist but have not yet been documented.
1536 .#define bfd_sizeof_headers(abfd, info) \
1537 . BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, info))
1539 .#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
1540 . BFD_SEND (abfd, _bfd_find_nearest_line, \
1541 . (abfd, syms, sec, off, file, func, line, NULL))
1543 .#define bfd_find_nearest_line_discriminator(abfd, sec, syms, off, file, func, \
1545 . BFD_SEND (abfd, _bfd_find_nearest_line, \
1546 . (abfd, syms, sec, off, file, func, line, disc))
1548 .#define bfd_find_line(abfd, syms, sym, file, line) \
1549 . BFD_SEND (abfd, _bfd_find_line, \
1550 . (abfd, syms, sym, file, line))
1552 .#define bfd_find_inliner_info(abfd, file, func, line) \
1553 . BFD_SEND (abfd, _bfd_find_inliner_info, \
1554 . (abfd, file, func, line))
1556 .#define bfd_debug_info_start(abfd) \
1557 . BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
1559 .#define bfd_debug_info_end(abfd) \
1560 . BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
1562 .#define bfd_debug_info_accumulate(abfd, section) \
1563 . BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
1565 .#define bfd_stat_arch_elt(abfd, stat) \
1566 . BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
1568 .#define bfd_update_armap_timestamp(abfd) \
1569 . BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd))
1571 .#define bfd_set_arch_mach(abfd, arch, mach)\
1572 . BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
1574 .#define bfd_relax_section(abfd, section, link_info, again) \
1575 . BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again))
1577 .#define bfd_gc_sections(abfd, link_info) \
1578 . BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
1580 .#define bfd_lookup_section_flags(link_info, flag_info, section) \
1581 . BFD_SEND (abfd, _bfd_lookup_section_flags, (link_info, flag_info, section))
1583 .#define bfd_merge_sections(abfd, link_info) \
1584 . BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
1586 .#define bfd_is_group_section(abfd, sec) \
1587 . BFD_SEND (abfd, _bfd_is_group_section, (abfd, sec))
1589 .#define bfd_discard_group(abfd, sec) \
1590 . BFD_SEND (abfd, _bfd_discard_group, (abfd, sec))
1592 .#define bfd_link_hash_table_create(abfd) \
1593 . BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
1595 .#define bfd_link_add_symbols(abfd, info) \
1596 . BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
1598 .#define bfd_link_just_syms(abfd, sec, info) \
1599 . BFD_SEND (abfd, _bfd_link_just_syms, (sec, info))
1601 .#define bfd_final_link(abfd, info) \
1602 . BFD_SEND (abfd, _bfd_final_link, (abfd, info))
1604 .#define bfd_free_cached_info(abfd) \
1605 . BFD_SEND (abfd, _bfd_free_cached_info, (abfd))
1607 .#define bfd_get_dynamic_symtab_upper_bound(abfd) \
1608 . BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd))
1610 .#define bfd_print_private_bfd_data(abfd, file)\
1611 . BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file))
1613 .#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \
1614 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols))
1616 .#define bfd_get_synthetic_symtab(abfd, count, syms, dyncount, dynsyms, ret) \
1617 . BFD_SEND (abfd, _bfd_get_synthetic_symtab, (abfd, count, syms, \
1618 . dyncount, dynsyms, ret))
1620 .#define bfd_get_dynamic_reloc_upper_bound(abfd) \
1621 . BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd))
1623 .#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \
1624 . BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms))
1626 .extern bfd_byte *bfd_get_relocated_section_contents
1627 . (bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *,
1628 . bfd_boolean, asymbol **);
1634 bfd_get_relocated_section_contents (bfd *abfd,
1635 struct bfd_link_info *link_info,
1636 struct bfd_link_order *link_order,
1638 bfd_boolean relocatable,
1642 bfd_byte *(*fn) (bfd *, struct bfd_link_info *, struct bfd_link_order *,
1643 bfd_byte *, bfd_boolean, asymbol **);
1645 if (link_order->type == bfd_indirect_link_order)
1647 abfd2 = link_order->u.indirect.section->owner;
1654 fn = abfd2->xvec->_bfd_get_relocated_section_contents;
1656 return (*fn) (abfd, link_info, link_order, data, relocatable, symbols);
1659 /* Record information about an ELF program header. */
1662 bfd_record_phdr (bfd *abfd,
1664 bfd_boolean flags_valid,
1666 bfd_boolean at_valid,
1668 bfd_boolean includes_filehdr,
1669 bfd_boolean includes_phdrs,
1673 struct elf_segment_map *m, **pm;
1676 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
1679 amt = sizeof (struct elf_segment_map);
1680 amt += ((bfd_size_type) count - 1) * sizeof (asection *);
1681 m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
1688 m->p_flags_valid = flags_valid;
1689 m->p_paddr_valid = at_valid;
1690 m->includes_filehdr = includes_filehdr;
1691 m->includes_phdrs = includes_phdrs;
1694 memcpy (m->sections, secs, count * sizeof (asection *));
1696 for (pm = &elf_seg_map (abfd); *pm != NULL; pm = &(*pm)->next)
1704 /* Return true iff this target is 32-bit. */
1709 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1711 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
1712 return bed->s->elfclass == ELFCLASS32;
1715 /* For non-ELF targets, use architecture information. */
1716 return bfd_arch_bits_per_address (abfd) <= 32;
1720 /* bfd_sprintf_vma and bfd_fprintf_vma display an address in the
1721 target's address size. */
1724 bfd_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
1729 sprintf (buf, "%08lx", (unsigned long) value & 0xffffffff);
1733 sprintf_vma (buf, value);
1737 bfd_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
1742 fprintf ((FILE *) stream, "%08lx", (unsigned long) value & 0xffffffff);
1746 fprintf_vma ((FILE *) stream, value);
1754 bfd_boolean bfd_alt_mach_code (bfd *abfd, int alternative);
1758 When more than one machine code number is available for the
1759 same machine type, this function can be used to switch between
1760 the preferred one (alternative == 0) and any others. Currently,
1761 only ELF supports this feature, with up to two alternate
1766 bfd_alt_mach_code (bfd *abfd, int alternative)
1768 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
1772 switch (alternative)
1775 code = get_elf_backend_data (abfd)->elf_machine_code;
1779 code = get_elf_backend_data (abfd)->elf_machine_alt1;
1785 code = get_elf_backend_data (abfd)->elf_machine_alt2;
1794 elf_elfheader (abfd)->e_machine = code;
1804 bfd_emul_get_maxpagesize
1807 bfd_vma bfd_emul_get_maxpagesize (const char *);
1810 Returns the maximum page size, in bytes, as determined by
1814 Returns the maximum page size in bytes for ELF, 0 otherwise.
1818 bfd_emul_get_maxpagesize (const char *emul)
1820 const bfd_target *target;
1822 target = bfd_find_target (emul, NULL);
1824 && target->flavour == bfd_target_elf_flavour)
1825 return xvec_get_elf_backend_data (target)->maxpagesize;
1831 bfd_elf_set_pagesize (const bfd_target *target, bfd_vma size,
1832 int offset, const bfd_target *orig_target)
1834 if (target->flavour == bfd_target_elf_flavour)
1836 const struct elf_backend_data *bed;
1838 bed = xvec_get_elf_backend_data (target);
1839 *((bfd_vma *) ((char *) bed + offset)) = size;
1842 if (target->alternative_target
1843 && target->alternative_target != orig_target)
1844 bfd_elf_set_pagesize (target->alternative_target, size, offset,
1850 bfd_emul_set_maxpagesize
1853 void bfd_emul_set_maxpagesize (const char *, bfd_vma);
1856 For ELF, set the maximum page size for the emulation. It is
1857 a no-op for other formats.
1862 bfd_emul_set_maxpagesize (const char *emul, bfd_vma size)
1864 const bfd_target *target;
1866 target = bfd_find_target (emul, NULL);
1868 bfd_elf_set_pagesize (target, size,
1869 offsetof (struct elf_backend_data,
1870 maxpagesize), target);
1875 bfd_emul_get_commonpagesize
1878 bfd_vma bfd_emul_get_commonpagesize (const char *);
1881 Returns the common page size, in bytes, as determined by
1885 Returns the common page size in bytes for ELF, 0 otherwise.
1889 bfd_emul_get_commonpagesize (const char *emul)
1891 const bfd_target *target;
1893 target = bfd_find_target (emul, NULL);
1895 && target->flavour == bfd_target_elf_flavour)
1896 return xvec_get_elf_backend_data (target)->commonpagesize;
1903 bfd_emul_set_commonpagesize
1906 void bfd_emul_set_commonpagesize (const char *, bfd_vma);
1909 For ELF, set the common page size for the emulation. It is
1910 a no-op for other formats.
1915 bfd_emul_set_commonpagesize (const char *emul, bfd_vma size)
1917 const bfd_target *target;
1919 target = bfd_find_target (emul, NULL);
1921 bfd_elf_set_pagesize (target, size,
1922 offsetof (struct elf_backend_data,
1923 commonpagesize), target);
1931 char *bfd_demangle (bfd *, const char *, int);
1934 Wrapper around cplus_demangle. Strips leading underscores and
1935 other such chars that would otherwise confuse the demangler.
1936 If passed a g++ v3 ABI mangled name, returns a buffer allocated
1937 with malloc holding the demangled name. Returns NULL otherwise
1938 and on memory alloc failure.
1942 bfd_demangle (bfd *abfd, const char *name, int options)
1945 const char *pre, *suf;
1947 bfd_boolean skip_lead;
1949 skip_lead = (abfd != NULL
1951 && bfd_get_symbol_leading_char (abfd) == *name);
1955 /* This is a hack for better error reporting on XCOFF, PowerPC64-ELF
1956 or the MS PE format. These formats have a number of leading '.'s
1957 on at least some symbols, so we remove all dots to avoid
1958 confusing the demangler. */
1960 while (*name == '.' || *name == '$')
1962 pre_len = name - pre;
1964 /* Strip off @plt and suchlike too. */
1966 suf = strchr (name, '@');
1969 alloc = (char *) bfd_malloc (suf - name + 1);
1972 memcpy (alloc, name, suf - name);
1973 alloc[suf - name] = '\0';
1977 res = cplus_demangle (name, options);
1986 size_t len = strlen (pre) + 1;
1987 alloc = (char *) bfd_malloc (len);
1990 memcpy (alloc, pre, len);
1996 /* Put back any prefix or suffix. */
1997 if (pre_len != 0 || suf != NULL)
2006 suf_len = strlen (suf) + 1;
2007 final = (char *) bfd_malloc (pre_len + len + suf_len);
2010 memcpy (final, pre, pre_len);
2011 memcpy (final + pre_len, res, len);
2012 memcpy (final + pre_len + len, suf, suf_len);
2023 bfd_update_compression_header
2026 void bfd_update_compression_header
2027 (bfd *abfd, bfd_byte *contents, asection *sec);
2030 Set the compression header at CONTENTS of SEC in ABFD and update
2031 elf_section_flags for compression.
2035 bfd_update_compression_header (bfd *abfd, bfd_byte *contents,
2038 if ((abfd->flags & BFD_COMPRESS) != 0)
2040 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
2042 if ((abfd->flags & BFD_COMPRESS_GABI) != 0)
2044 const struct elf_backend_data *bed
2045 = get_elf_backend_data (abfd);
2047 /* Set the SHF_COMPRESSED bit. */
2048 elf_section_flags (sec) |= SHF_COMPRESSED;
2050 if (bed->s->elfclass == ELFCLASS32)
2052 Elf32_External_Chdr *echdr
2053 = (Elf32_External_Chdr *) contents;
2054 bfd_put_32 (abfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
2055 bfd_put_32 (abfd, sec->size, &echdr->ch_size);
2056 bfd_put_32 (abfd, 1 << sec->alignment_power,
2057 &echdr->ch_addralign);
2061 Elf64_External_Chdr *echdr
2062 = (Elf64_External_Chdr *) contents;
2063 bfd_put_32 (abfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
2064 bfd_put_32 (abfd, 0, &echdr->ch_reserved);
2065 bfd_put_64 (abfd, sec->size, &echdr->ch_size);
2066 bfd_put_64 (abfd, 1 << sec->alignment_power,
2067 &echdr->ch_addralign);
2072 /* Clear the SHF_COMPRESSED bit. */
2073 elf_section_flags (sec) &= ~SHF_COMPRESSED;
2075 /* Write the zlib header. It should be "ZLIB" followed by
2076 the uncompressed section size, 8 bytes in big-endian
2078 memcpy (contents, "ZLIB", 4);
2079 bfd_putb64 (sec->size, contents + 4);
2089 bfd_check_compression_header
2092 bfd_boolean bfd_check_compression_header
2093 (bfd *abfd, bfd_byte *contents, asection *sec,
2094 bfd_size_type *uncompressed_size);
2097 Check the compression header at CONTENTS of SEC in ABFD and
2098 store the uncompressed size in UNCOMPRESSED_SIZE if the
2099 compression header is valid.
2102 Return TRUE if the compression header is valid.
2106 bfd_check_compression_header (bfd *abfd, bfd_byte *contents,
2108 bfd_size_type *uncompressed_size)
2110 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
2111 && (elf_section_flags (sec) & SHF_COMPRESSED) != 0)
2113 Elf_Internal_Chdr chdr;
2114 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
2115 if (bed->s->elfclass == ELFCLASS32)
2117 Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
2118 chdr.ch_type = bfd_get_32 (abfd, &echdr->ch_type);
2119 chdr.ch_size = bfd_get_32 (abfd, &echdr->ch_size);
2120 chdr.ch_addralign = bfd_get_32 (abfd, &echdr->ch_addralign);
2124 Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
2125 chdr.ch_type = bfd_get_32 (abfd, &echdr->ch_type);
2126 chdr.ch_size = bfd_get_64 (abfd, &echdr->ch_size);
2127 chdr.ch_addralign = bfd_get_64 (abfd, &echdr->ch_addralign);
2129 if (chdr.ch_type == ELFCOMPRESS_ZLIB
2130 && chdr.ch_addralign == 1U << sec->alignment_power)
2132 *uncompressed_size = chdr.ch_size;
2142 bfd_get_compression_header_size
2145 int bfd_get_compression_header_size (bfd *abfd, asection *sec);
2148 Return the size of the compression header of SEC in ABFD.
2151 Return the size of the compression header in bytes.
2155 bfd_get_compression_header_size (bfd *abfd, asection *sec)
2157 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
2161 if (!(abfd->flags & BFD_COMPRESS_GABI))
2164 else if (!(elf_section_flags (sec) & SHF_COMPRESSED))
2167 if (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS32)
2168 return sizeof (Elf32_External_Chdr);
2170 return sizeof (Elf64_External_Chdr);
2178 bfd_convert_section_size
2181 bfd_size_type bfd_convert_section_size
2182 (bfd *ibfd, asection *isec, bfd *obfd, bfd_size_type size);
2185 Convert the size @var{size} of the section @var{isec} in input
2186 BFD @var{ibfd} to the section size in output BFD @var{obfd}.
2190 bfd_convert_section_size (bfd *ibfd, sec_ptr isec, bfd *obfd,
2193 bfd_size_type hdr_size;
2195 /* Do nothing if input file will be decompressed. */
2196 if ((ibfd->flags & BFD_DECOMPRESS))
2199 /* Do nothing if either input or output aren't ELF. */
2200 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2201 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2204 /* Do nothing if ELF classes of input and output are the same. */
2205 if (get_elf_backend_data (ibfd)->s->elfclass
2206 == get_elf_backend_data (obfd)->s->elfclass)
2209 /* Do nothing if the input section isn't a SHF_COMPRESSED section. */
2210 hdr_size = bfd_get_compression_header_size (ibfd, isec);
2214 /* Adjust the size of the output SHF_COMPRESSED section. */
2215 if (hdr_size == sizeof (Elf32_External_Chdr))
2216 return (size - sizeof (Elf32_External_Chdr)
2217 + sizeof (Elf64_External_Chdr));
2219 return (size - sizeof (Elf64_External_Chdr)
2220 + sizeof (Elf32_External_Chdr));
2225 bfd_convert_section_contents
2228 bfd_boolean bfd_convert_section_contents
2229 (bfd *ibfd, asection *isec, bfd *obfd,
2230 bfd_byte **ptr, bfd_size_type *ptr_size);
2233 Convert the contents, stored in @var{*ptr}, of the section
2234 @var{isec} in input BFD @var{ibfd} to output BFD @var{obfd}
2235 if needed. The original buffer pointed to by @var{*ptr} may
2236 be freed and @var{*ptr} is returned with memory malloc'd by this
2237 function, and the new size written to @var{ptr_size}.
2241 bfd_convert_section_contents (bfd *ibfd, sec_ptr isec, bfd *obfd,
2242 bfd_byte **ptr, bfd_size_type *ptr_size)
2245 bfd_size_type ihdr_size, ohdr_size, size;
2246 Elf_Internal_Chdr chdr;
2247 bfd_boolean use_memmove;
2249 /* Do nothing if input file will be decompressed. */
2250 if ((ibfd->flags & BFD_DECOMPRESS))
2253 /* Do nothing if either input or output aren't ELF. */
2254 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2255 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2258 /* Do nothing if ELF classes of input and output are the same. */
2259 if (get_elf_backend_data (ibfd)->s->elfclass
2260 == get_elf_backend_data (obfd)->s->elfclass)
2263 /* Do nothing if the input section isn't a SHF_COMPRESSED section. */
2264 ihdr_size = bfd_get_compression_header_size (ibfd, isec);
2270 /* Convert the contents of the input SHF_COMPRESSED section to
2271 output. Get the input compression header and the size of the
2272 output compression header. */
2273 if (ihdr_size == sizeof (Elf32_External_Chdr))
2275 Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
2276 chdr.ch_type = bfd_get_32 (ibfd, &echdr->ch_type);
2277 chdr.ch_size = bfd_get_32 (ibfd, &echdr->ch_size);
2278 chdr.ch_addralign = bfd_get_32 (ibfd, &echdr->ch_addralign);
2280 ohdr_size = sizeof (Elf64_External_Chdr);
2282 use_memmove = FALSE;
2286 Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
2287 chdr.ch_type = bfd_get_32 (ibfd, &echdr->ch_type);
2288 chdr.ch_size = bfd_get_64 (ibfd, &echdr->ch_size);
2289 chdr.ch_addralign = bfd_get_64 (ibfd, &echdr->ch_addralign);
2291 ohdr_size = sizeof (Elf32_External_Chdr);
2295 size = bfd_get_section_size (isec) - ihdr_size + ohdr_size;
2298 contents = (bfd_byte *) bfd_malloc (size);
2299 if (contents == NULL)
2303 /* Write out the output compression header. */
2304 if (ohdr_size == sizeof (Elf32_External_Chdr))
2306 Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
2307 bfd_put_32 (obfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
2308 bfd_put_32 (obfd, chdr.ch_size, &echdr->ch_size);
2309 bfd_put_32 (obfd, chdr.ch_addralign, &echdr->ch_addralign);
2313 Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
2314 bfd_put_32 (obfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
2315 bfd_put_32 (obfd, 0, &echdr->ch_reserved);
2316 bfd_put_64 (obfd, chdr.ch_size, &echdr->ch_size);
2317 bfd_put_64 (obfd, chdr.ch_addralign, &echdr->ch_addralign);
2320 /* Copy the compressed contents. */
2322 memmove (contents + ohdr_size, *ptr + ihdr_size, size - ohdr_size);
2325 memcpy (contents + ohdr_size, *ptr + ihdr_size, size - ohdr_size);