/* Generic BFD support for file formats.
- Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
+ Copyright (C) 1990, 91, 92, 93, 94, 95, 1999 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
SECTION
#include "libbfd.h"
/* IMPORT from targets.c. */
-extern CONST size_t _bfd_target_vector_entries;
+extern const size_t _bfd_target_vector_entries;
/*
FUNCTION
The function returns <<true>> on success, otherwise <<false>>
with one of the following error codes:
- o <<invalid_operation>> -
+ o <<bfd_error_invalid_operation>> -
if <<format>> is not one of <<bfd_object>>, <<bfd_archive>> or
<<bfd_core>>.
- o <<system_call_error>> -
+ o <<bfd_error_system_call>> -
if an error occured during a read - even some file mismatches
- can cause system_call_errors.
+ can cause bfd_error_system_calls.
o <<file_not_recognised>> -
none of the backends recognised the file format.
- o <<file_ambiguously_recognized>> -
+ o <<bfd_error_file_ambiguously_recognized>> -
more than one backend recognised the file format.
*/
DESCRIPTION
Like <<bfd_check_format>>, except when it returns false with
- <<bfd_errno>> set to <<file_ambiguously_recognized>>. In that
+ <<bfd_errno>> set to <<bfd_error_file_ambiguously_recognized>>. In that
case, if @var{matching} is not NULL, it will be filled in with
a NULL-terminated list of the names of the formats that matched,
allocated with <<malloc>>.
bfd_format format;
char ***matching;
{
- bfd_target **target, *save_targ, *right_targ;
- char **matching_vector;
+ extern const bfd_target binary_vec;
+ const bfd_target * const *target, *save_targ, *right_targ;
+ char **matching_vector = NULL;
int match_count;
if (!bfd_read_p (abfd) ||
((int)(abfd->format) < (int)bfd_unknown) ||
- ((int)(abfd->format) >= (int)bfd_type_end)) {
- bfd_error = invalid_operation;
- return false;
- }
+ ((int)(abfd->format) >= (int)bfd_type_end))
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
if (abfd->format != bfd_unknown)
return (abfd->format == format)? true: false;
-
/* Since the target type was defaulted, check them
all in the hope that one will be uniquely recognized. */
-
save_targ = abfd->xvec;
match_count = 0;
+
if (matching)
{
- *matching = matching_vector =
- bfd_xmalloc_by_size_t (sizeof (char *) *
- (_bfd_target_vector_entries + 1));
+ matching_vector =
+ (char **) bfd_malloc (sizeof (char *) *
+ (_bfd_target_vector_entries + 1));
+ if (!matching_vector)
+ return false;
matching_vector[0] = NULL;
+ *matching = matching_vector;
}
+
right_targ = 0;
-
- /* presume the answer is yes */
+ /* Presume the answer is yes. */
abfd->format = format;
/* If the target type was explicitly specified, just check that target. */
-
- if (!abfd->target_defaulted) {
- bfd_seek (abfd, (file_ptr)0, SEEK_SET); /* rewind! */
-
- right_targ = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
- if (right_targ) {
- abfd->xvec = right_targ; /* Set the target as returned */
- if (matching)
- free (matching_vector);
- return true; /* File position has moved, BTW */
- }
- }
-
- for (target = bfd_target_vector; *target != NULL; target++) {
- bfd_target *temp;
-
- abfd->xvec = *target; /* Change BFD's target temporarily */
- bfd_seek (abfd, (file_ptr)0, SEEK_SET);
- /* If _bfd_check_format neglects to set bfd_error, assume wrong_format.
- We didn't used to even pay any attention to bfd_error, so I suspect
- that some _bfd_check_format might have this problem. */
- bfd_error = wrong_format;
- temp = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
- if (temp) { /* This format checks out as ok! */
- right_targ = temp;
- match_count++;
- if (matching)
+ if (!abfd->target_defaulted)
+ {
+ if (bfd_seek (abfd, (file_ptr)0, SEEK_SET) != 0) /* rewind! */
+ return false;
+
+ right_targ = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
+
+ if (right_targ)
{
- matching_vector[match_count] = temp->name;
- matching_vector[match_count] = NULL;
+ abfd->xvec = right_targ; /* Set the target as returned. */
+
+ if (matching)
+ free (matching_vector);
+
+ return true; /* File position has moved, BTW. */
}
- /* If this is the default target, accept it, even if other targets
- might match. People who want those other targets have to set
- the GNUTARGET variable. */
- if (temp == bfd_default_vector[0])
+
+ /* For a long time the code has dropped through to check all
+ targets if the specified target was wrong. I don't know why,
+ and I'm reluctant to change it. However, in the case of an
+ archive, it can cause problems. If the specified target does
+ not permit archives (e.g., the binary target), then we should
+ not allow some other target to recognize it as an archive, but
+ should instead allow the specified target to recognize it as an
+ object. When I first made this change, it broke the PE target,
+ because the specified pei-i386 target did not recognize the
+ actual pe-i386 archive. Since there may be other problems of
+ this sort, I changed this test to check only for the binary
+ target. */
+ if (format == bfd_archive && save_targ == &binary_vec)
{
- match_count = 1;
+ abfd->xvec = save_targ;
+ abfd->format = bfd_unknown;
+
+ if (matching)
+ free (matching_vector);
+
+ bfd_set_error (bfd_error_file_not_recognized);
+
+ return false;
+ }
+ }
+
+ for (target = bfd_target_vector; *target != NULL; target++)
+ {
+ const bfd_target *temp;
+
+ if (*target == &binary_vec)
+ continue;
+
+ abfd->xvec = *target; /* Change BFD's target temporarily */
+
+ if (bfd_seek (abfd, (file_ptr)0, SEEK_SET) != 0)
+ return false;
+
+ /* If _bfd_check_format neglects to set bfd_error, assume
+ bfd_error_wrong_format. We didn't used to even pay any
+ attention to bfd_error, so I suspect that some
+ _bfd_check_format might have this problem. */
+ bfd_set_error (bfd_error_wrong_format);
+
+ temp = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
+
+ if (temp)
+ { /* This format checks out as ok! */
+ right_targ = temp;
+
if (matching)
{
- matching_vector[0] = temp->name;
- matching_vector[1] = NULL;
+ matching_vector[match_count] = temp->name;
+ matching_vector[match_count + 1] = NULL;
+ }
+
+ match_count++;
+
+ /* If this is the default target, accept it, even if other
+ targets might match. People who want those other targets
+ have to set the GNUTARGET variable. */
+ if (temp == bfd_default_vector[0])
+ {
+ if (matching)
+ {
+ matching_vector[0] = temp->name;
+ matching_vector[1] = NULL;
+ }
+ match_count = 1;
+ break;
}
- break;
- }
#ifdef GNU960
- /* Big- and little-endian b.out archives look the same, but it doesn't
- * matter: there is no difference in their headers, and member file byte
- * orders will (I hope) be handled appropriately by bfd. Ditto for big
- * and little coff archives. And the 4 coff/b.out object formats are
- * unambiguous. So accept the first match we find.
- */
- break;
+ /* Big- and little-endian b.out archives look the same, but it
+ doesn't matter: there is no difference in their headers, and
+ member file byte orders will (I hope) be handled appropriately
+ by bfd. Ditto for big and little coff archives. And the 4
+ coff/b.out object formats are unambiguous. So accept the
+ first match we find. */
+ break;
#endif
- } else if (bfd_error != wrong_format) {
- abfd->xvec = save_targ;
- abfd->format = bfd_unknown;
- if (matching && bfd_error != file_ambiguously_recognized)
+ }
+ else if (bfd_get_error () != bfd_error_wrong_format)
+ {
+ abfd->xvec = save_targ;
+ abfd->format = bfd_unknown;
+
+ if (matching && bfd_get_error ()
+ != bfd_error_file_ambiguously_recognized)
+ free (matching_vector);
+
+ return false;
+ }
+ }
+
+ if (match_count == 1)
+ {
+ abfd->xvec = right_targ; /* Change BFD's target permanently. */
+
+ if (matching)
free (matching_vector);
- return false;
+
+ return true; /* File position has moved, BTW. */
}
- }
-
- if (match_count == 1) {
- abfd->xvec = right_targ; /* Change BFD's target permanently */
- if (matching)
- free (matching_vector);
- return true; /* File position has moved, BTW */
- }
- abfd->xvec = save_targ; /* Restore original target type */
- abfd->format = bfd_unknown; /* Restore original format */
+ abfd->xvec = save_targ; /* Restore original target type. */
+ abfd->format = bfd_unknown; /* Restore original format. */
+
if (match_count == 0)
{
- bfd_error = file_not_recognized;
+ bfd_set_error (bfd_error_file_not_recognized);
+
if (matching)
free (matching_vector);
}
else
- bfd_error = file_ambiguously_recognized;
+ bfd_set_error (bfd_error_file_ambiguously_recognized);
+
return false;
}
format @var{format}. If the target set in the BFD does not
support the format requested, the format is invalid, or the BFD
is not open for writing, then an error occurs.
-
*/
boolean
bfd *abfd;
bfd_format format;
{
-
if (bfd_read_p (abfd) ||
((int)abfd->format < (int)bfd_unknown) ||
- ((int)abfd->format >= (int)bfd_type_end)) {
- bfd_error = invalid_operation;
- return false;
- }
+ ((int)abfd->format >= (int)bfd_type_end))
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
if (abfd->format != bfd_unknown)
- return (abfd->format == format) ? true:false;
+ return (abfd->format == format) ? true : false;
- /* presume the answer is yes */
+ /* Presume the answer is yes. */
abfd->format = format;
- if (!BFD_SEND_FMT (abfd, _bfd_set_format, (abfd))) {
- abfd->format = bfd_unknown;
- return false;
- }
+ if (!BFD_SEND_FMT (abfd, _bfd_set_format, (abfd)))
+ {
+ abfd->format = bfd_unknown;
+ return false;
+ }
return true;
}
|| ((int)format >=(int) bfd_type_end))
return "invalid";
- switch (format) {
- case bfd_object:
- return "object"; /* linker/assember/compiler output */
- case bfd_archive:
- return "archive"; /* object archive file */
- case bfd_core:
- return "core"; /* core dump */
- default:
- return "unknown";
- }
+ switch (format)
+ {
+ case bfd_object:
+ return "object"; /* Linker/assember/compiler output. */
+ case bfd_archive:
+ return "archive"; /* Object archive file. */
+ case bfd_core:
+ return "core"; /* Core dump. */
+ default:
+ return "unknown";
+ }
}
projects / deliverable / binutils-gdb.git / blobdiff