1 /* Assorted BFD support routines, only used internally.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #ifndef HAVE_GETPAGESIZE
28 #define getpagesize() 2048
31 static size_t real_read PARAMS ((PTR, size_t, size_t, FILE *));
38 These routines are used within BFD.
39 They are not intended for export, but are documented here for
43 /* A routine which is used in target vectors for unsupported
48 bfd *ignore ATTRIBUTE_UNUSED;
50 bfd_set_error (bfd_error_invalid_operation);
54 /* A routine which is used in target vectors for supported operations
55 which do not actually do anything. */
59 bfd *ignore ATTRIBUTE_UNUSED;
64 /* A routine which is used in target vectors for unsupported
65 operations which return a pointer value. */
68 bfd_nullvoidptr (ignore)
69 bfd *ignore ATTRIBUTE_UNUSED;
71 bfd_set_error (bfd_error_invalid_operation);
77 bfd *ignore ATTRIBUTE_UNUSED;
84 bfd *ignore ATTRIBUTE_UNUSED;
91 bfd *ignore ATTRIBUTE_UNUSED;
96 /* A routine which is used in target vectors for unsupported
97 operations which return -1 on error. */
100 _bfd_n1 (ignore_abfd)
101 bfd *ignore_abfd ATTRIBUTE_UNUSED;
103 bfd_set_error (bfd_error_invalid_operation);
109 bfd *ignore ATTRIBUTE_UNUSED;
114 _bfd_nocore_core_file_matches_executable_p (ignore_core_bfd, ignore_exec_bfd)
115 bfd *ignore_core_bfd ATTRIBUTE_UNUSED;
116 bfd *ignore_exec_bfd ATTRIBUTE_UNUSED;
118 bfd_set_error (bfd_error_invalid_operation);
122 /* Routine to handle core_file_failing_command entry point for targets
123 without core file support. */
126 _bfd_nocore_core_file_failing_command (ignore_abfd)
127 bfd *ignore_abfd ATTRIBUTE_UNUSED;
129 bfd_set_error (bfd_error_invalid_operation);
133 /* Routine to handle core_file_failing_signal entry point for targets
134 without core file support. */
137 _bfd_nocore_core_file_failing_signal (ignore_abfd)
138 bfd *ignore_abfd ATTRIBUTE_UNUSED;
140 bfd_set_error (bfd_error_invalid_operation);
145 _bfd_dummy_target (ignore_abfd)
146 bfd *ignore_abfd ATTRIBUTE_UNUSED;
148 bfd_set_error (bfd_error_wrong_format);
152 /* Allocate memory using malloc. */
160 if (size != (size_t) size)
162 bfd_set_error (bfd_error_no_memory);
166 ptr = (PTR) malloc ((size_t) size);
167 if (ptr == NULL && (size_t) size != 0)
168 bfd_set_error (bfd_error_no_memory);
173 /* Reallocate memory using realloc. */
176 bfd_realloc (ptr, size)
182 if (size != (size_t) size)
184 bfd_set_error (bfd_error_no_memory);
189 ret = malloc ((size_t) size);
191 ret = realloc (ptr, (size_t) size);
193 if (ret == NULL && (size_t) size != 0)
194 bfd_set_error (bfd_error_no_memory);
199 /* Allocate memory using malloc and clear it. */
207 if (size != (size_t) size)
209 bfd_set_error (bfd_error_no_memory);
213 ptr = (PTR) malloc ((size_t) size);
215 if ((size_t) size != 0)
218 bfd_set_error (bfd_error_no_memory);
220 memset (ptr, 0, (size_t) size);
228 /* Note that archive entries don't have streams; they share their parent's.
229 This allows someone to play with the iostream behind BFD's back.
231 Also, note that the origin pointer points to the beginning of a file's
232 contents (0 for non-archive elements). For archive entries this is the
233 first octet in the file, NOT the beginning of the archive header. */
236 real_read (where, a, b, file)
242 /* FIXME - this looks like an optimization, but it's really to cover
243 up for a feature of some OSs (not solaris - sigh) that
244 ld/pe-dll.c takes advantage of (apparently) when it creates BFDs
245 internally and tries to link against them. BFD seems to be smart
246 enough to realize there are no symbol records in the "file" that
247 doesn't exist but attempts to read them anyway. On Solaris,
248 attempting to read zero bytes from a NULL file results in a core
249 dump, but on other platforms it just returns zero bytes read.
250 This makes it to something reasonable. - DJ */
251 if (a == 0 || b == 0)
255 #if defined (__VAX) && defined (VMS)
256 /* Apparently fread on Vax VMS does not keep the record length
258 return read (fileno (file), where, a * b);
260 return fread (where, a, b, file);
264 /* Return value is amount read. */
267 bfd_bread (ptr, size, abfd)
274 if ((abfd->flags & BFD_IN_MEMORY) != 0)
276 struct bfd_in_memory *bim;
279 bim = (struct bfd_in_memory *) abfd->iostream;
281 if (abfd->where + get > bim->size)
283 if (bim->size < (bfd_size_type) abfd->where)
286 get = bim->size - abfd->where;
287 bfd_set_error (bfd_error_file_truncated);
289 memcpy (ptr, bim->buffer + abfd->where, (size_t) get);
294 nread = real_read (ptr, 1, (size_t) size, bfd_cache_lookup (abfd));
295 if (nread != (size_t) -1)
296 abfd->where += nread;
298 /* Set bfd_error if we did not read as much data as we expected.
300 If the read failed due to an error set the bfd_error_system_call,
301 else set bfd_error_file_truncated.
303 A BFD backend may wish to override bfd_error_file_truncated to
304 provide something more useful (eg. no_symbols or wrong_format). */
307 if (ferror (bfd_cache_lookup (abfd)))
308 bfd_set_error (bfd_error_system_call);
310 bfd_set_error (bfd_error_file_truncated);
316 /* The window support stuff should probably be broken out into
318 /* The idea behind the next and refcount fields is that one mapped
319 region can suffice for multiple read-only windows or multiple
320 non-overlapping read-write windows. It's not implemented yet
322 struct _bfd_window_internal {
323 struct _bfd_window_internal *next;
326 int refcount : 31; /* should be enough... */
327 unsigned mapped : 1; /* 1 = mmap, 0 = malloc */
331 bfd_init_window (windowp)
339 /* Currently, if USE_MMAP is undefined, none if the window stuff is
340 used. Okay, so it's mis-named. At least the command-line option
341 "--without-mmap" is more obvious than "--without-windows" or some
345 #undef HAVE_MPROTECT /* code's not tested yet */
347 #if HAVE_MMAP || HAVE_MPROTECT || HAVE_MADVISE
348 #include <sys/mman.h>
355 static int debug_windows;
358 bfd_free_window (windowp)
361 bfd_window_internal *i = windowp->i;
368 fprintf (stderr, "freeing window @%p<%p,%lx,%p>\n",
369 windowp, windowp->data, windowp->size, windowp->i);
370 if (i->refcount != 0)
376 munmap (i->data, i->size);
383 mprotect (i->data, i->size, PROT_READ | PROT_WRITE);
390 /* There should be no more references to i at this point. */
394 static int ok_to_map = 1;
397 bfd_get_file_window (abfd, offset, size, windowp, writable)
404 static size_t pagesize;
405 bfd_window_internal *i = windowp->i;
406 bfd_size_type size_to_alloc = size;
409 fprintf (stderr, "bfd_get_file_window (%p, %6ld, %6ld, %p<%p,%lx,%p>, %d)",
410 abfd, (long) offset, (long) size,
411 windowp, windowp->data, (unsigned long) windowp->size,
412 windowp->i, writable);
414 /* Make sure we know the page size, so we can be friendly to mmap. */
416 pagesize = getpagesize ();
422 i = ((bfd_window_internal *)
423 bfd_zmalloc ((bfd_size_type) sizeof (bfd_window_internal)));
431 && (i->data == 0 || i->mapped == 1)
432 && (abfd->flags & BFD_IN_MEMORY) == 0)
434 file_ptr file_offset, offset2;
439 /* Find the real file and the real offset into it. */
440 while (abfd->my_archive != NULL)
442 offset += abfd->origin;
443 abfd = abfd->my_archive;
445 f = bfd_cache_lookup (abfd);
448 /* Compute offsets and size for mmap and for the user's data. */
449 offset2 = offset % pagesize;
452 file_offset = offset - offset2;
453 real_size = offset + size - file_offset;
454 real_size = real_size + pagesize - 1;
455 real_size -= real_size % pagesize;
457 /* If we're re-using a memory region, make sure it's big enough. */
458 if (i->data && i->size < size)
460 munmap (i->data, i->size);
463 i->data = mmap (i->data, real_size,
464 writable ? PROT_WRITE | PROT_READ : PROT_READ,
466 ? MAP_FILE | MAP_PRIVATE
467 : MAP_FILE | MAP_SHARED),
469 if (i->data == (PTR) -1)
471 /* An error happened. Report it, or try using malloc, or
473 bfd_set_error (bfd_error_system_call);
477 fprintf (stderr, "\t\tmmap failed!\n");
481 fprintf (stderr, "\n\tmapped %ld at %p, offset is %ld\n",
482 (long) real_size, i->data, (long) offset2);
484 windowp->data = (PTR) ((bfd_byte *) i->data + offset2);
485 windowp->size = size;
489 else if (debug_windows)
492 fprintf (stderr, _("not mapping: data=%lx mapped=%d\n"),
493 (unsigned long) i->data, (int) i->mapped);
495 fprintf (stderr, _("not mapping: env var not set\n"));
504 size_to_alloc += pagesize - 1;
505 size_to_alloc -= size_to_alloc % pagesize;
509 fprintf (stderr, "\n\t%s(%6ld)",
510 i->data ? "realloc" : " malloc", (long) size_to_alloc);
511 i->data = (PTR) bfd_realloc (i->data, size_to_alloc);
513 fprintf (stderr, "\t-> %p\n", i->data);
517 if (size_to_alloc == 0)
521 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
523 i->size = bfd_bread (i->data, size, abfd);
531 fprintf (stderr, "\tmprotect (%p, %ld, PROT_READ)\n", i->data,
533 mprotect (i->data, i->size, PROT_READ);
536 windowp->data = i->data;
537 windowp->size = i->size;
541 #endif /* USE_MMAP */
544 bfd_bwrite (ptr, size, abfd)
551 if ((abfd->flags & BFD_IN_MEMORY) != 0)
553 struct bfd_in_memory *bim = (struct bfd_in_memory *) (abfd->iostream);
554 size = (size_t) size;
555 if (abfd->where + size > bim->size)
557 bfd_size_type newsize, oldsize;
559 oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
560 bim->size = abfd->where + size;
561 /* Round up to cut down on memory fragmentation */
562 newsize = (bim->size + 127) & ~(bfd_size_type) 127;
563 if (newsize > oldsize)
565 bim->buffer = bfd_realloc (bim->buffer, newsize);
566 if (bim->buffer == 0)
573 memcpy (bim->buffer + abfd->where, ptr, (size_t) size);
578 nwrote = fwrite (ptr, 1, (size_t) size, bfd_cache_lookup (abfd));
579 if (nwrote != (size_t) -1)
580 abfd->where += nwrote;
586 bfd_set_error (bfd_error_system_call);
593 bfd_write_bigendian_4byte_int
596 void bfd_write_bigendian_4byte_int (bfd *, unsigned int);
599 Write a 4 byte integer @var{i} to the output BFD @var{abfd}, in big
600 endian order regardless of what else is going on. This is useful in
605 bfd_write_bigendian_4byte_int (abfd, i)
610 bfd_putb32 ((bfd_vma) i, buffer);
611 if (bfd_bwrite ((PTR) buffer, (bfd_size_type) 4, abfd) != 4)
621 if ((abfd->flags & BFD_IN_MEMORY) != 0)
624 ptr = ftell (bfd_cache_lookup (abfd));
626 if (abfd->my_archive)
636 if ((abfd->flags & BFD_IN_MEMORY) != 0)
638 return fflush (bfd_cache_lookup(abfd));
641 /* Returns 0 for success, negative value for failure (in which case
642 bfd_get_error can retrieve the error code). */
644 bfd_stat (abfd, statbuf)
646 struct stat *statbuf;
651 if ((abfd->flags & BFD_IN_MEMORY) != 0)
654 f = bfd_cache_lookup (abfd);
657 bfd_set_error (bfd_error_system_call);
660 result = fstat (fileno (f), statbuf);
662 bfd_set_error (bfd_error_system_call);
666 /* Returns 0 for success, nonzero for failure (in which case bfd_get_error
667 can retrieve the error code). */
670 bfd_seek (abfd, position, direction)
678 /* For the time being, a BFD may not seek to it's end. The problem
679 is that we don't easily have a way to recognize the end of an
680 element in an archive. */
682 BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR);
684 if (direction == SEEK_CUR && position == 0)
687 if ((abfd->flags & BFD_IN_MEMORY) != 0)
689 struct bfd_in_memory *bim;
691 bim = (struct bfd_in_memory *) abfd->iostream;
693 if (direction == SEEK_SET)
694 abfd->where = position;
696 abfd->where += position;
698 if (abfd->where > bim->size)
700 if ((abfd->direction == write_direction) ||
701 (abfd->direction == both_direction))
703 bfd_size_type newsize, oldsize;
704 oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
705 bim->size = abfd->where;
706 /* Round up to cut down on memory fragmentation */
707 newsize = (bim->size + 127) & ~(bfd_size_type) 127;
708 if (newsize > oldsize)
710 bim->buffer = bfd_realloc (bim->buffer, newsize);
711 if (bim->buffer == 0)
720 abfd->where = bim->size;
721 bfd_set_error (bfd_error_file_truncated);
728 if (abfd->format != bfd_archive && abfd->my_archive == 0)
731 /* Explanation for this code: I'm only about 95+% sure that the above
732 conditions are sufficient and that all i/o calls are properly
733 adjusting the `where' field. So this is sort of an `assert'
734 that the `where' field is correct. If we can go a while without
735 tripping the abort, we can probably safely disable this code,
736 so that the real optimizations happen. */
737 file_ptr where_am_i_now;
738 where_am_i_now = ftell (bfd_cache_lookup (abfd));
739 if (abfd->my_archive)
740 where_am_i_now -= abfd->origin;
741 if (where_am_i_now != abfd->where)
744 if (direction == SEEK_SET && (bfd_vma) position == abfd->where)
749 /* We need something smarter to optimize access to archives.
750 Currently, anything inside an archive is read via the file
751 handle for the archive. Which means that a bfd_seek on one
752 component affects the `current position' in the archive, as
753 well as in any other component.
755 It might be sufficient to put a spike through the cache
756 abstraction, and look to the archive for the file position,
757 but I think we should try for something cleaner.
759 In the meantime, no optimization for archives. */
762 f = bfd_cache_lookup (abfd);
763 file_position = position;
764 if (direction == SEEK_SET && abfd->my_archive != NULL)
765 file_position += abfd->origin;
767 result = fseek (f, file_position, direction);
770 int hold_errno = errno;
772 /* Force redetermination of `where' field. */
775 /* An EINVAL error probably means that the file offset was
777 if (hold_errno == EINVAL)
778 bfd_set_error (bfd_error_file_truncated);
781 bfd_set_error (bfd_error_system_call);
787 /* Adjust `where' field. */
788 if (direction == SEEK_SET)
789 abfd->where = position;
791 abfd->where += position;
796 /** The do-it-yourself (byte) sex-change kit */
798 /* The middle letter e.g. get<b>short indicates Big or Little endian
799 target machine. It doesn't matter what the byte order of the host
800 machine is; these routines work for either. */
802 /* FIXME: Should these take a count argument?
803 Answer (gnu@cygnus.com): No, but perhaps they should be inline
804 functions in swap.h #ifdef __GNUC__.
805 Gprof them later and find out. */
814 These macros as used for reading and writing raw data in
815 sections; each access (except for bytes) is vectored through
816 the target format of the BFD and mangled accordingly. The
817 mangling performs any necessary endian translations and
818 removes alignment restrictions. Note that types accepted and
819 returned by these macros are identical so they can be swapped
820 around in macros---for example, @file{libaout.h} defines <<GET_WORD>>
821 to either <<bfd_get_32>> or <<bfd_get_64>>.
823 In the put routines, @var{val} must be a <<bfd_vma>>. If we are on a
824 system without prototypes, the caller is responsible for making
825 sure that is true, with a cast if necessary. We don't cast
826 them in the macro definitions because that would prevent <<lint>>
827 or <<gcc -Wall>> from detecting sins such as passing a pointer.
828 To detect calling these with less than a <<bfd_vma>>, use
829 <<gcc -Wconversion>> on a host with 64 bit <<bfd_vma>>'s.
832 .{* Byte swapping macros for user section data. *}
834 .#define bfd_put_8(abfd, val, ptr) \
835 . ((void) (*((unsigned char *) (ptr)) = (unsigned char) (val)))
836 .#define bfd_put_signed_8 \
838 .#define bfd_get_8(abfd, ptr) \
839 . (*(unsigned char *) (ptr) & 0xff)
840 .#define bfd_get_signed_8(abfd, ptr) \
841 . (((*(unsigned char *) (ptr) & 0xff) ^ 0x80) - 0x80)
843 .#define bfd_put_16(abfd, val, ptr) \
844 . BFD_SEND(abfd, bfd_putx16, ((val),(ptr)))
845 .#define bfd_put_signed_16 \
847 .#define bfd_get_16(abfd, ptr) \
848 . BFD_SEND(abfd, bfd_getx16, (ptr))
849 .#define bfd_get_signed_16(abfd, ptr) \
850 . BFD_SEND (abfd, bfd_getx_signed_16, (ptr))
852 .#define bfd_put_32(abfd, val, ptr) \
853 . BFD_SEND(abfd, bfd_putx32, ((val),(ptr)))
854 .#define bfd_put_signed_32 \
856 .#define bfd_get_32(abfd, ptr) \
857 . BFD_SEND(abfd, bfd_getx32, (ptr))
858 .#define bfd_get_signed_32(abfd, ptr) \
859 . BFD_SEND(abfd, bfd_getx_signed_32, (ptr))
861 .#define bfd_put_64(abfd, val, ptr) \
862 . BFD_SEND(abfd, bfd_putx64, ((val), (ptr)))
863 .#define bfd_put_signed_64 \
865 .#define bfd_get_64(abfd, ptr) \
866 . BFD_SEND(abfd, bfd_getx64, (ptr))
867 .#define bfd_get_signed_64(abfd, ptr) \
868 . BFD_SEND(abfd, bfd_getx_signed_64, (ptr))
870 .#define bfd_get(bits, abfd, ptr) \
871 . ( (bits) == 8 ? (bfd_vma) bfd_get_8 (abfd, ptr) \
872 . : (bits) == 16 ? bfd_get_16 (abfd, ptr) \
873 . : (bits) == 32 ? bfd_get_32 (abfd, ptr) \
874 . : (bits) == 64 ? bfd_get_64 (abfd, ptr) \
875 . : (abort (), (bfd_vma) - 1))
877 .#define bfd_put(bits, abfd, val, ptr) \
878 . ( (bits) == 8 ? bfd_put_8 (abfd, val, ptr) \
879 . : (bits) == 16 ? bfd_put_16 (abfd, val, ptr) \
880 . : (bits) == 32 ? bfd_put_32 (abfd, val, ptr) \
881 . : (bits) == 64 ? bfd_put_64 (abfd, val, ptr) \
882 . : (abort (), (void) 0))
892 These macros have the same function as their <<bfd_get_x>>
893 brethren, except that they are used for removing information
894 for the header records of object files. Believe it or not,
895 some object files keep their header records in big endian
896 order and their data in little endian order.
898 .{* Byte swapping macros for file header data. *}
900 .#define bfd_h_put_8(abfd, val, ptr) \
901 . bfd_put_8 (abfd, val, ptr)
902 .#define bfd_h_put_signed_8(abfd, val, ptr) \
903 . bfd_put_8 (abfd, val, ptr)
904 .#define bfd_h_get_8(abfd, ptr) \
905 . bfd_get_8 (abfd, ptr)
906 .#define bfd_h_get_signed_8(abfd, ptr) \
907 . bfd_get_signed_8 (abfd, ptr)
909 .#define bfd_h_put_16(abfd, val, ptr) \
910 . BFD_SEND (abfd, bfd_h_putx16, (val, ptr))
911 .#define bfd_h_put_signed_16 \
913 .#define bfd_h_get_16(abfd, ptr) \
914 . BFD_SEND (abfd, bfd_h_getx16, (ptr))
915 .#define bfd_h_get_signed_16(abfd, ptr) \
916 . BFD_SEND (abfd, bfd_h_getx_signed_16, (ptr))
918 .#define bfd_h_put_32(abfd, val, ptr) \
919 . BFD_SEND (abfd, bfd_h_putx32, (val, ptr))
920 .#define bfd_h_put_signed_32 \
922 .#define bfd_h_get_32(abfd, ptr) \
923 . BFD_SEND (abfd, bfd_h_getx32, (ptr))
924 .#define bfd_h_get_signed_32(abfd, ptr) \
925 . BFD_SEND (abfd, bfd_h_getx_signed_32, (ptr))
927 .#define bfd_h_put_64(abfd, val, ptr) \
928 . BFD_SEND (abfd, bfd_h_putx64, (val, ptr))
929 .#define bfd_h_put_signed_64 \
931 .#define bfd_h_get_64(abfd, ptr) \
932 . BFD_SEND (abfd, bfd_h_getx64, (ptr))
933 .#define bfd_h_get_signed_64(abfd, ptr) \
934 . BFD_SEND (abfd, bfd_h_getx_signed_64, (ptr))
936 .{* Refinements on the above, which should eventually go away. Save
937 . cluttering the source with (bfd_vma) and (bfd_byte *) casts. *}
939 .#define H_PUT_64(abfd, val, where) \
940 . bfd_h_put_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
942 .#define H_PUT_32(abfd, val, where) \
943 . bfd_h_put_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
945 .#define H_PUT_16(abfd, val, where) \
946 . bfd_h_put_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
948 .#define H_PUT_8 bfd_h_put_8
950 .#define H_PUT_S64(abfd, val, where) \
951 . bfd_h_put_signed_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
953 .#define H_PUT_S32(abfd, val, where) \
954 . bfd_h_put_signed_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
956 .#define H_PUT_S16(abfd, val, where) \
957 . bfd_h_put_signed_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
959 .#define H_PUT_S8 bfd_h_put_signed_8
961 .#define H_GET_64(abfd, where) \
962 . bfd_h_get_64 ((abfd), (bfd_byte *) (where))
964 .#define H_GET_32(abfd, where) \
965 . bfd_h_get_32 ((abfd), (bfd_byte *) (where))
967 .#define H_GET_16(abfd, where) \
968 . bfd_h_get_16 ((abfd), (bfd_byte *) (where))
970 .#define H_GET_8 bfd_h_get_8
972 .#define H_GET_S64(abfd, where) \
973 . bfd_h_get_signed_64 ((abfd), (bfd_byte *) (where))
975 .#define H_GET_S32(abfd, where) \
976 . bfd_h_get_signed_32 ((abfd), (bfd_byte *) (where))
978 .#define H_GET_S16(abfd, where) \
979 . bfd_h_get_signed_16 ((abfd), (bfd_byte *) (where))
981 .#define H_GET_S8 bfd_h_get_signed_8
985 /* Sign extension to bfd_signed_vma. */
986 #define COERCE16(x) (((bfd_signed_vma) (x) ^ 0x8000) - 0x8000)
987 #define COERCE32(x) \
988 ((bfd_signed_vma) (long) (((unsigned long) (x) ^ 0x80000000) - 0x80000000))
989 #define EIGHT_GAZILLION (((BFD_HOST_64_BIT)0x80000000) << 32)
990 #define COERCE64(x) \
991 (((bfd_signed_vma) (x) ^ EIGHT_GAZILLION) - EIGHT_GAZILLION)
995 register const bfd_byte *addr;
997 return (addr[0] << 8) | addr[1];
1002 register const bfd_byte *addr;
1004 return (addr[1] << 8) | addr[0];
1008 bfd_getb_signed_16 (addr)
1009 register const bfd_byte *addr;
1011 return COERCE16((addr[0] << 8) | addr[1]);
1015 bfd_getl_signed_16 (addr)
1016 register const bfd_byte *addr;
1018 return COERCE16((addr[1] << 8) | addr[0]);
1022 bfd_putb16 (data, addr)
1024 register bfd_byte *addr;
1026 addr[0] = (bfd_byte) (data >> 8);
1027 addr[1] = (bfd_byte) data;
1031 bfd_putl16 (data, addr)
1033 register bfd_byte *addr;
1035 addr[0] = (bfd_byte) data;
1036 addr[1] = (bfd_byte) (data >> 8);
1041 register const bfd_byte *addr;
1045 v = (unsigned long) addr[0] << 24;
1046 v |= (unsigned long) addr[1] << 16;
1047 v |= (unsigned long) addr[2] << 8;
1048 v |= (unsigned long) addr[3];
1054 register const bfd_byte *addr;
1058 v = (unsigned long) addr[0];
1059 v |= (unsigned long) addr[1] << 8;
1060 v |= (unsigned long) addr[2] << 16;
1061 v |= (unsigned long) addr[3] << 24;
1066 bfd_getb_signed_32 (addr)
1067 register const bfd_byte *addr;
1071 v = (unsigned long) addr[0] << 24;
1072 v |= (unsigned long) addr[1] << 16;
1073 v |= (unsigned long) addr[2] << 8;
1074 v |= (unsigned long) addr[3];
1075 return COERCE32 (v);
1079 bfd_getl_signed_32 (addr)
1080 register const bfd_byte *addr;
1084 v = (unsigned long) addr[0];
1085 v |= (unsigned long) addr[1] << 8;
1086 v |= (unsigned long) addr[2] << 16;
1087 v |= (unsigned long) addr[3] << 24;
1088 return COERCE32 (v);
1093 register const bfd_byte *addr ATTRIBUTE_UNUSED;
1098 high= ((((((((addr[0]) << 8) |
1103 low = (((((((((bfd_vma)addr[4]) << 8) |
1108 return high << 32 | low;
1117 register const bfd_byte *addr ATTRIBUTE_UNUSED;
1121 high= (((((((addr[7] << 8) |
1126 low = ((((((((bfd_vma)addr[3] << 8) |
1131 return high << 32 | low;
1140 bfd_getb_signed_64 (addr)
1141 register const bfd_byte *addr ATTRIBUTE_UNUSED;
1146 high= ((((((((addr[0]) << 8) |
1151 low = (((((((((bfd_vma)addr[4]) << 8) |
1156 return COERCE64(high << 32 | low);
1164 bfd_getl_signed_64 (addr)
1165 register const bfd_byte *addr ATTRIBUTE_UNUSED;
1169 high= (((((((addr[7] << 8) |
1174 low = ((((((((bfd_vma)addr[3] << 8) |
1179 return COERCE64(high << 32 | low);
1187 bfd_putb32 (data, addr)
1189 register bfd_byte *addr;
1191 addr[0] = (bfd_byte) (data >> 24);
1192 addr[1] = (bfd_byte) (data >> 16);
1193 addr[2] = (bfd_byte) (data >> 8);
1194 addr[3] = (bfd_byte) data;
1198 bfd_putl32 (data, addr)
1200 register bfd_byte *addr;
1202 addr[0] = (bfd_byte) data;
1203 addr[1] = (bfd_byte) (data >> 8);
1204 addr[2] = (bfd_byte) (data >> 16);
1205 addr[3] = (bfd_byte) (data >> 24);
1209 bfd_putb64 (data, addr)
1210 bfd_vma data ATTRIBUTE_UNUSED;
1211 register bfd_byte *addr ATTRIBUTE_UNUSED;
1214 addr[0] = (bfd_byte) (data >> (7*8));
1215 addr[1] = (bfd_byte) (data >> (6*8));
1216 addr[2] = (bfd_byte) (data >> (5*8));
1217 addr[3] = (bfd_byte) (data >> (4*8));
1218 addr[4] = (bfd_byte) (data >> (3*8));
1219 addr[5] = (bfd_byte) (data >> (2*8));
1220 addr[6] = (bfd_byte) (data >> (1*8));
1221 addr[7] = (bfd_byte) (data >> (0*8));
1228 bfd_putl64 (data, addr)
1229 bfd_vma data ATTRIBUTE_UNUSED;
1230 register bfd_byte *addr ATTRIBUTE_UNUSED;
1233 addr[7] = (bfd_byte) (data >> (7*8));
1234 addr[6] = (bfd_byte) (data >> (6*8));
1235 addr[5] = (bfd_byte) (data >> (5*8));
1236 addr[4] = (bfd_byte) (data >> (4*8));
1237 addr[3] = (bfd_byte) (data >> (3*8));
1238 addr[2] = (bfd_byte) (data >> (2*8));
1239 addr[1] = (bfd_byte) (data >> (1*8));
1240 addr[0] = (bfd_byte) (data >> (0*8));
1247 bfd_put_bits (data, addr, bits, big_p)
1260 for (i = 0; i < bytes; i++)
1262 int index = big_p ? bytes - i - 1 : i;
1264 addr[index] = (bfd_byte) data;
1270 bfd_get_bits (addr, bits, big_p)
1284 for (i = 0; i < bytes; i++)
1286 int index = big_p ? i : bytes - i - 1;
1288 data = (data << 8) | addr[index];
1294 /* Default implementation */
1297 _bfd_generic_get_section_contents (abfd, section, location, offset, count)
1302 bfd_size_type count;
1307 if (offset + count > section->_raw_size)
1309 bfd_set_error (bfd_error_invalid_operation);
1313 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1314 || bfd_bread (location, count, abfd) != count)
1321 _bfd_generic_get_section_contents_in_window (abfd, section, w, offset, count)
1322 bfd *abfd ATTRIBUTE_UNUSED;
1323 sec_ptr section ATTRIBUTE_UNUSED;
1324 bfd_window *w ATTRIBUTE_UNUSED;
1325 file_ptr offset ATTRIBUTE_UNUSED;
1326 bfd_size_type count ATTRIBUTE_UNUSED;
1331 if (abfd->xvec->_bfd_get_section_contents != _bfd_generic_get_section_contents)
1333 /* We don't know what changes the bfd's get_section_contents
1334 method may have to make. So punt trying to map the file
1335 window, and let get_section_contents do its thing. */
1336 /* @@ FIXME : If the internal window has a refcount of 1 and was
1337 allocated with malloc instead of mmap, just reuse it. */
1338 bfd_free_window (w);
1339 w->i = ((bfd_window_internal *)
1340 bfd_zmalloc ((bfd_size_type) sizeof (bfd_window_internal)));
1343 w->i->data = (PTR) bfd_malloc (count);
1344 if (w->i->data == NULL)
1352 w->size = w->i->size = count;
1353 w->data = w->i->data;
1354 return bfd_get_section_contents (abfd, section, w->data, offset, count);
1356 if (offset + count > section->_raw_size
1357 || (bfd_get_file_window (abfd, section->filepos + offset, count, w, true)
1366 /* This generic function can only be used in implementations where creating
1367 NEW sections is disallowed. It is useful in patching existing sections
1368 in read-write files, though. See other set_section_contents functions
1369 to see why it doesn't work for new sections. */
1371 _bfd_generic_set_section_contents (abfd, section, location, offset, count)
1376 bfd_size_type count;
1381 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
1382 || bfd_bwrite (location, count, abfd) != count)
1393 unsigned int bfd_log2 (bfd_vma x);
1396 Return the log base 2 of the value supplied, rounded up. E.g., an
1397 @var{x} of 1025 returns 11. A @var{x} of 0 returns 0.
1404 unsigned int result = 0;
1406 while ((x = (x >> 1)) != 0)
1412 bfd_generic_is_local_label_name (abfd, name)
1416 char locals_prefix = (bfd_get_symbol_leading_char (abfd) == '_') ? 'L' : '.';
1418 return (name[0] == locals_prefix);
1421 /* Can be used from / for bfd_merge_private_bfd_data to check that
1422 endianness matches between input and output file. Returns
1423 true for a match, otherwise returns false and emits an error. */
1425 _bfd_generic_verify_endian_match (ibfd, obfd)
1429 if (ibfd->xvec->byteorder != obfd->xvec->byteorder
1430 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
1431 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
1435 if (bfd_big_endian (ibfd))
1436 msg = _("%s: compiled for a big endian system and target is little endian");
1438 msg = _("%s: compiled for a little endian system and target is big endian");
1440 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd));
1442 bfd_set_error (bfd_error_wrong_format);
1449 /* Give a warning at runtime if someone compiles code which calls
1453 warn_deprecated (what, file, line, func)
1459 /* Poor man's tracking of functions we've already warned about. */
1460 static size_t mask = 0;
1462 if (~(size_t) func & ~mask)
1464 /* Note: seperate sentances in order to allow
1465 for translation into other languages. */
1467 fprintf (stderr, _("Deprecated %s called at %s line %d in %s\n"),
1468 what, file, line, func);
1470 fprintf (stderr, _("Deprecated %s called\n"), what);
1471 mask |= ~(size_t) func;