/* opncls.c -- open and close a BFD.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
- 2001, 2002, 2003
+ 2001, 2002, 2003, 2004
Free Software Foundation, Inc.
Written by Cygnus Support.
nbfd->direction = no_direction;
nbfd->iostream = NULL;
nbfd->where = 0;
- if (!bfd_hash_table_init_n (&nbfd->section_htab,
- bfd_section_hash_newfunc,
+ if (!bfd_hash_table_init_n (& nbfd->section_htab, bfd_section_hash_newfunc,
251))
{
free (nbfd);
if (nbfd == NULL)
return NULL;
nbfd->xvec = obfd->xvec;
+ nbfd->iovec = obfd->iovec;
nbfd->my_archive = obfd;
nbfd->direction = read_direction;
nbfd->target_defaulted = obfd->target_defaulted;
descriptors for other opens), with the supplied @var{fd} used as
an initial file descriptor (but subject to closure at any time),
call bfd_set_cacheable(bfd, 1) on the returned BFD. The default
- is to assume no cacheing; the file descriptor will remain open
+ is to assume no caching; the file descriptor will remain open
until <<bfd_close>>, and will not be affected by BFD operations
on other files.
return nbfd;
}
+
+/*
+FUNCTION
+ bfd_openr_iovec
+
+SYNOPSIS
+ bfd *bfd_openr_iovec (const char *filename, const char *target,
+ void *(*open) (struct bfd *nbfd,
+ void *open_closure),
+ void *open_closure,
+ file_ptr (*pread) (struct bfd *nbfd,
+ void *stream,
+ void *buf,
+ file_ptr nbytes,
+ file_ptr offset),
+ int (*close) (struct bfd *nbfd,
+ void *stream));
+
+DESCRIPTION
+
+ Create and return a BFD backed by a read-only @var{stream}.
+ The @var{stream} is created using @var{open}, accessed using
+ @var{pread} and destroyed using @var{close}.
+
+ Calls <<bfd_find_target>>, so @var{target} is interpreted as by
+ that function.
+
+ Calls @var{open} (which can call <<bfd_zalloc>> and
+ <<bfd_get_filename>>) to obtain the read-only stream backing
+ the BFD. @var{open} either succeeds returning the
+ non-<<NULL>> @var{stream}, or fails returning <<NULL>>
+ (setting <<bfd_error>>).
+
+ Calls @var{pread} to request @var{nbytes} of data from
+ @var{stream} starting at @var{offset} (e.g., via a call to
+ <<bfd_read>>). @var{pread} either succeeds returning the
+ number of bytes read (which can be less than @var{nbytes} when
+ end-of-file), or fails returning -1 (setting <<bfd_error>>).
+
+ Calls @var{close} when the BFD is later closed using
+ <<bfd_close>>. @var{close} either succeeds returning 0, or
+ fails returning -1 (setting <<bfd_error>>).
+
+ If <<bfd_openr_iovec>> returns <<NULL>> then an error has
+ occurred. Possible errors are <<bfd_error_no_memory>>,
+ <<bfd_error_invalid_target>> and <<bfd_error_system_call>>.
+
+*/
+
+struct opncls
+{
+ void *stream;
+ file_ptr (*pread) (struct bfd *abfd, void *stream, void *buf,
+ file_ptr nbytes, file_ptr offset);
+ int (*close) (struct bfd *abfd, void *stream);
+ file_ptr where;
+};
+
+static file_ptr
+opncls_btell (struct bfd *abfd)
+{
+ struct opncls *vec = abfd->iostream;
+ return vec->where;
+}
+
+static int
+opncls_bseek (struct bfd *abfd, file_ptr offset, int whence)
+{
+ struct opncls *vec = abfd->iostream;
+ switch (whence)
+ {
+ case SEEK_SET: vec->where = offset; break;
+ case SEEK_CUR: vec->where += offset; break;
+ case SEEK_END: return -1;
+ }
+ return 0;
+}
+
+static file_ptr
+opncls_bread (struct bfd *abfd, void *buf, file_ptr nbytes)
+{
+ struct opncls *vec = abfd->iostream;
+ file_ptr nread = vec->pread (abfd, vec->stream, buf, nbytes, vec->where);
+ if (nread < 0)
+ return nread;
+ vec->where += nread;
+ return nread;
+}
+
+static file_ptr
+opncls_bwrite (struct bfd *abfd ATTRIBUTE_UNUSED,
+ const void *where ATTRIBUTE_UNUSED,
+ file_ptr nbytes ATTRIBUTE_UNUSED)
+{
+ return -1;
+}
+
+static int
+opncls_bclose (struct bfd *abfd)
+{
+ struct opncls *vec = abfd->iostream;
+ /* Since the VEC's memory is bound to the bfd deleting the bfd will
+ free it. */
+ int status = 0;
+ if (vec->close != NULL)
+ status = vec->close (abfd, vec->stream);
+ abfd->iostream = NULL;
+ return status;
+}
+
+static int
+opncls_bflush (struct bfd *abfd ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+static int
+opncls_bstat (struct bfd *abfd ATTRIBUTE_UNUSED, struct stat *sb)
+{
+ memset (sb, 0, sizeof (*sb));
+ return 0;
+}
+
+static const struct bfd_iovec opncls_iovec = {
+ &opncls_bread, &opncls_bwrite, &opncls_btell, &opncls_bseek,
+ &opncls_bclose, &opncls_bflush, &opncls_bstat
+};
+
+bfd *
+bfd_openr_iovec (const char *filename, const char *target,
+ void *(*open) (struct bfd *nbfd,
+ void *open_closure),
+ void *open_closure,
+ file_ptr (*pread) (struct bfd *abfd,
+ void *stream,
+ void *buf,
+ file_ptr nbytes,
+ file_ptr offset),
+ int (*close) (struct bfd *nbfd,
+ void *stream))
+{
+ bfd *nbfd;
+ const bfd_target *target_vec;
+ struct opncls *vec;
+ void *stream;
+
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ return NULL;
+
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ nbfd->filename = filename;
+ nbfd->direction = read_direction;
+
+ stream = open (nbfd, open_closure);
+ if (stream == NULL)
+ {
+ _bfd_delete_bfd (nbfd);
+ return NULL;
+ }
+
+ vec = bfd_zalloc (nbfd, sizeof (struct opncls));
+ vec->stream = stream;
+ vec->pread = pread;
+ vec->close = close;
+
+ nbfd->iovec = &opncls_iovec;
+ nbfd->iostream = vec;
+
+ return nbfd;
+}
\f
/* bfd_openw -- open for writing.
Returns a pointer to a freshly-allocated BFD on success, or NULL.
if (! BFD_SEND (abfd, _close_and_cleanup, (abfd)))
return FALSE;
- ret = bfd_cache_close (abfd);
+ /* FIXME: cagney/2004-02-15: Need to implement a BFD_IN_MEMORY io
+ vector. */
+ if (!(abfd->flags & BFD_IN_MEMORY))
+ ret = abfd->iovec->bclose (abfd);
+ else
+ ret = TRUE;
/* If the file was open for writing and is now executable,
make it so. */
bfd_alloc
SYNOPSIS
- void *bfd_alloc (bfd *abfd, size_t wanted);
+ void *bfd_alloc (bfd *abfd, bfd_size_type wanted);
DESCRIPTION
Allocate a block of @var{wanted} bytes of memory attached to
}
-/*
- GNU Extension: separate debug-info files
-
+/*
+ GNU Extension: separate debug-info files
+
The idea here is that a special section called .gnu_debuglink might be
embedded in a binary file, which indicates that some *other* file
contains the real debugging information. This special section contains a
RETURNS
Return the updated CRC32 value.
-*/
+*/
unsigned long
bfd_calc_gnu_debuglink_crc32 (unsigned long crc,
static char *
get_debug_link_info (bfd *abfd, unsigned long *crc32_out)
{
- asection * sect;
- bfd_size_type debuglink_size;
+ asection *sect;
unsigned long crc32;
- char * contents;
+ bfd_byte *contents;
int crc_offset;
- bfd_boolean ret;
BFD_ASSERT (abfd);
BFD_ASSERT (crc32_out);
if (sect == NULL)
return NULL;
- debuglink_size = bfd_section_size (abfd, sect);
-
- contents = malloc (debuglink_size);
- if (contents == NULL)
- return NULL;
-
- ret = bfd_get_section_contents (abfd, sect, contents, 0, debuglink_size);
- if (! ret)
+ if (!bfd_malloc_and_get_section (abfd, sect, &contents))
{
- free (contents);
+ if (contents != NULL)
+ free (contents);
return NULL;
}
return NULL;
}
BFD_ASSERT (strlen (dir) != 0);
-
+
/* Strip off filename part. */
for (i = strlen (dir) - 1; i >= 0; i--)
if (IS_DIR_SEPARATOR (dir[i]))
break;
-
+
dir[i + 1] = '\0';
- BFD_ASSERT (dir[i] == '/' || dir[0] == '\0')
+ BFD_ASSERT (dir[i] == '/' || dir[0] == '\0');
debugfile = malloc (strlen (debug_file_directory) + 1
+ strlen (dir)
+ strlen (".debug/")
- + strlen (basename)
+ + strlen (basename)
+ 1);
if (debugfile == NULL)
{
DESCRIPTION
Takes a BFD and searches it for a .gnu_debuglink section. If this
- section is found, examines the section for the name and checksum of
- a '.debug' file containing auxiliary debugging
- information. Searches filesystem for .debug file in some standard
+ section is found, it examines the section for the name and checksum
+ of a '.debug' file containing auxiliary debugging information. It
+ then searches the filesystem for this .debug file in some standard
locations, including the directory tree rooted at @var{dir}, and if
- found returns the full filename. If @var{dir} is NULL, will search
- default path configured into libbfd at build time.
+ found returns the full filename.
+
+ If @var{dir} is NULL, it will search a default path configured into
+ libbfd at build time. [XXX this feature is not currently
+ implemented].
RETURNS
<<NULL>> on any errors or failure to locate the .debug file,
otherwise a pointer to a heap-allocated string containing the
- filename. The caller is responsible for freeing this string.
+ filename. The caller is responsible for freeing this string.
*/
char *
bfd_follow_gnu_debuglink (bfd *abfd, const char *dir)
{
-#if 0 /* Disabled until DEBUGDIR can be defined by configure.in */
+#if 0 /* Disabled until DEBUGDIR can be defined by configure.in. */
if (dir == NULL)
dir = DEBUGDIR;
#endif
RETURNS
A pointer to the new section is returned if all is ok. Otherwise <<NULL>> is
- returned and bfd_error is set.
+ returned and bfd_error is set.
*/
asection *
/* Strip off any path components in filename. */
filename = lbasename (filename);
-
+
sect = bfd_get_section_by_name (abfd, GNU_DEBUGLINK);
if (sect)
{
/* XXX Should we delete the section from the bfd ? */
return NULL;
-
+
debuglink_size = strlen (filename) + 1;
debuglink_size += 3;
debuglink_size &= ~3;
if (! bfd_set_section_size (abfd, sect, debuglink_size))
/* XXX Should we delete the section from the bfd ? */
return NULL;
-
+
return sect;
}
RETURNS
<<TRUE>> is returned if all is ok. Otherwise <<FALSE>> is returned
- and bfd_error is set.
+ and bfd_error is set.
*/
bfd_boolean
/* Strip off any path components in filename,
now that we no longer need them. */
filename = lbasename (filename);
-
+
debuglink_size = strlen (filename) + 1;
debuglink_size += 3;
debuglink_size &= ~3;
projects / deliverable / binutils-gdb.git / blobdiff