* opncls.c (_bfd_new_bfd_contained_in): Copy "iovec".
(struct opncls, opncls_btell, opncls_bseek, opncls_bread)
(opncls_bwrite, opncls_bclose, opncls_bflush)
(opncls_bstat, opncls_iovec, bfd_openr_iovec): Implement a
bfd iovec that uses function callbacks.
(bfd_close): Use the iovec's bclose.
* cache.c (cache_btell, cache_bseek, cache_bread, cache_bwrite)
(cache_bclose, cache_bflush, cache_bstat)
(cache_iovec): New functions and global variable, implement a
cache "iovec", where applicable set bfd_error.
(bfd_cache_init, bfd_cache_close): Set/test the bfd's iovec.
* bfdio.c (struct bfd_iovec): Define.
(real_read): Delete function.
(bfd_bread, bfd_bread, bfd_bwrite, bfd_tell, bfd_flush, bfd_stat)
(bfd_seek, bfd_get_mtime, bfd_get_size): Use the bfd's "iovec",
assume that bread and bwrite set bfd_error.
* bfd.c (struct bfd): Add "iovec", update comments.
* bfd-in2.h, libbfd.h: Re-generate.
+2004-04-21 Andrew Cagney <cagney@redhat.com>
+
+ * opncls.c (_bfd_new_bfd_contained_in): Copy "iovec".
+ (struct opncls, opncls_btell, opncls_bseek, opncls_bread)
+ (opncls_bwrite, opncls_bclose, opncls_bflush)
+ (opncls_bstat, opncls_iovec, bfd_openr_iovec): Implement a
+ bfd iovec that uses function callbacks.
+ (bfd_close): Use the iovec's bclose.
+ * cache.c (cache_btell, cache_bseek, cache_bread, cache_bwrite)
+ (cache_bclose, cache_bflush, cache_bstat)
+ (cache_iovec): New functions and global variable, implement a
+ cache "iovec", where applicable set bfd_error.
+ (bfd_cache_init, bfd_cache_close): Set/test the bfd's iovec.
+ * bfdio.c (struct bfd_iovec): Define.
+ (real_read): Delete function.
+ (bfd_bread, bfd_bread, bfd_bwrite, bfd_tell, bfd_flush, bfd_stat)
+ (bfd_seek, bfd_get_mtime, bfd_get_size): Use the bfd's "iovec",
+ assume that bread and bwrite set bfd_error.
+ * bfd.c (struct bfd): Add "iovec", update comments.
+ * bfd-in2.h, libbfd.h: Re-generate.
+
2004-04-21 Andrew Cagney <cagney@redhat.com>
* libaout.h (enum machine_type): Add M_POWERPC_NETBSD.
bfd *bfd_openstreamr (const char *, const char *, void *);
+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));
+
bfd *bfd_openw (const char *filename, const char *target);
bfd_boolean bfd_close (bfd *abfd);
/* A pointer to the target jump table. */
const struct bfd_target *xvec;
- /* To avoid dragging too many header files into every file that
- includes `<<bfd.h>>', IOSTREAM has been declared as a "char *",
- and MTIME as a "long". Their correct types, to which they
- are cast when used, are "FILE *" and "time_t". The iostream
- is the result of an fopen on the filename. However, if the
- BFD_IN_MEMORY flag is set, then iostream is actually a pointer
- to a bfd_in_memory struct. */
+ /* The IOSTREAM, and corresponding IO vector that provide access
+ to the file backing the BFD. */
void *iostream;
+ const struct bfd_iovec *iovec;
/* Is the file descriptor being cached? That is, can it be closed as
needed, and re-opened when accessed later? */
. {* A pointer to the target jump table. *}
. const struct bfd_target *xvec;
.
-. {* To avoid dragging too many header files into every file that
-. includes `<<bfd.h>>', IOSTREAM has been declared as a "char *",
-. and MTIME as a "long". Their correct types, to which they
-. are cast when used, are "FILE *" and "time_t". The iostream
-. is the result of an fopen on the filename. However, if the
-. BFD_IN_MEMORY flag is set, then iostream is actually a pointer
-. to a bfd_in_memory struct. *}
+. {* The IOSTREAM, and corresponding IO vector that provide access
+. to the file backing the BFD. *}
. void *iostream;
+. const struct bfd_iovec *iovec;
.
. {* Is the file descriptor being cached? That is, can it be closed as
. needed, and re-opened when accessed later? *}
#endif
}
-/* Note that archive entries don't have streams; they share their parent's.
- This allows someone to play with the iostream behind BFD's back.
+/*
+INTERNAL_DEFINITION
+ struct bfd_iovec
- Also, note that the origin pointer points to the beginning of a file's
- contents (0 for non-archive elements). For archive entries this is the
- first octet in the file, NOT the beginning of the archive header. */
+DESCRIPTION
-static size_t
-real_read (void *where, size_t a, size_t b, FILE *file)
-{
- /* FIXME - this looks like an optimization, but it's really to cover
- up for a feature of some OSs (not solaris - sigh) that
- ld/pe-dll.c takes advantage of (apparently) when it creates BFDs
- internally and tries to link against them. BFD seems to be smart
- enough to realize there are no symbol records in the "file" that
- doesn't exist but attempts to read them anyway. On Solaris,
- attempting to read zero bytes from a NULL file results in a core
- dump, but on other platforms it just returns zero bytes read.
- This makes it to something reasonable. - DJ */
- if (a == 0 || b == 0)
- return 0;
+ The <<struct bfd_iovec>> contains the internal file I/O class.
+ Each <<BFD>> has an instance of this class and all file I/O is
+ routed through it (it is assumed that the instance implements
+ all methods listed below).
+
+.struct bfd_iovec
+.{
+. {* To avoid problems with macros, a "b" rather than "f"
+. prefix is prepended to each method name. *}
+. {* Attempt to read/write NBYTES on ABFD's IOSTREAM storing/fetching
+. bytes starting at PTR. Return the number of bytes actually
+. transfered (a read past end-of-file returns less than NBYTES),
+. or -1 (setting <<bfd_error>>) if an error occurs. *}
+. file_ptr (*bread) (struct bfd *abfd, void *ptr, file_ptr nbytes);
+. file_ptr (*bwrite) (struct bfd *abfd, const void *ptr,
+. file_ptr nbytes);
+. {* Return the current IOSTREAM file offset, or -1 (setting <<bfd_error>>
+. if an error occurs. *}
+. file_ptr (*btell) (struct bfd *abfd);
+. {* For the following, on successful completion a value of 0 is returned.
+. Otherwise, a value of -1 is returned (and <<bfd_error>> is set). *}
+. int (*bseek) (struct bfd *abfd, file_ptr offset, int whence);
+. int (*bclose) (struct bfd *abfd);
+. int (*bflush) (struct bfd *abfd);
+. int (*bstat) (struct bfd *abfd, struct stat *sb);
+.};
+*/
-#if defined (__VAX) && defined (VMS)
- /* Apparently fread on Vax VMS does not keep the record length
- information. */
- return read (fileno (file), where, a * b);
-#else
- return fread (where, a, b, file);
-#endif
-}
/* Return value is amount read. */
return get;
}
- nread = real_read (ptr, 1, (size_t) size, bfd_cache_lookup (abfd));
+ nread = abfd->iovec->bread (abfd, ptr, size);
if (nread != (size_t) -1)
abfd->where += nread;
- /* Set bfd_error if we did not read as much data as we expected.
-
- If the read failed due to an error set the bfd_error_system_call,
- else set bfd_error_file_truncated.
-
- A BFD backend may wish to override bfd_error_file_truncated to
- provide something more useful (eg. no_symbols or wrong_format). */
- if (nread != size)
- {
- if (ferror (bfd_cache_lookup (abfd)))
- bfd_set_error (bfd_error_system_call);
- else
- bfd_set_error (bfd_error_file_truncated);
- }
-
return nread;
}
return size;
}
- nwrote = fwrite (ptr, 1, (size_t) size, bfd_cache_lookup (abfd));
+ nwrote = abfd->iovec->bwrite (abfd, ptr, size);
if (nwrote != (size_t) -1)
abfd->where += nwrote;
if (nwrote != size)
if ((abfd->flags & BFD_IN_MEMORY) != 0)
return abfd->where;
- ptr = real_ftell (bfd_cache_lookup (abfd));
+ ptr = abfd->iovec->btell (abfd);
if (abfd->my_archive)
ptr -= abfd->origin;
{
if ((abfd->flags & BFD_IN_MEMORY) != 0)
return 0;
- return fflush (bfd_cache_lookup(abfd));
+ return abfd->iovec->bflush (abfd);
}
/* Returns 0 for success, negative value for failure (in which case
int
bfd_stat (bfd *abfd, struct stat *statbuf)
{
- FILE *f;
int result;
if ((abfd->flags & BFD_IN_MEMORY) != 0)
abort ();
- f = bfd_cache_lookup (abfd);
- if (f == NULL)
- {
- bfd_set_error (bfd_error_system_call);
- return -1;
- }
- result = fstat (fileno (f), statbuf);
+ result = abfd->iovec->bstat (abfd, statbuf);
if (result < 0)
bfd_set_error (bfd_error_system_call);
return result;
bfd_seek (bfd *abfd, file_ptr position, int direction)
{
int result;
- FILE *f;
file_ptr file_position;
/* For the time being, a BFD may not seek to it's end. The problem
is that we don't easily have a way to recognize the end of an
In the meantime, no optimization for archives. */
}
- f = bfd_cache_lookup (abfd);
file_position = position;
if (direction == SEEK_SET && abfd->my_archive != NULL)
file_position += abfd->origin;
- result = real_fseek (f, file_position, direction);
+ result = abfd->iovec->bseek (abfd, file_position, direction);
if (result != 0)
{
int hold_errno = errno;
long
bfd_get_mtime (bfd *abfd)
{
- FILE *fp;
struct stat buf;
if (abfd->mtime_set)
return abfd->mtime;
- fp = bfd_cache_lookup (abfd);
- if (0 != fstat (fileno (fp), &buf))
+ if (abfd->iovec->bstat (abfd, &buf) != 0)
return 0;
abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */
long
bfd_get_size (bfd *abfd)
{
- FILE *fp;
struct stat buf;
if ((abfd->flags & BFD_IN_MEMORY) != 0)
return ((struct bfd_in_memory *) abfd->iostream)->size;
- fp = bfd_cache_lookup (abfd);
- if (0 != fstat (fileno (fp), & buf))
+ if (abfd->iovec->bstat (abfd, &buf) != 0)
return 0;
return buf.st_size;
static bfd_boolean bfd_cache_delete (bfd *);
+
+static file_ptr
+cache_btell (struct bfd *abfd)
+{
+ return real_ftell (bfd_cache_lookup (abfd));
+}
+
+static int
+cache_bseek (struct bfd *abfd, file_ptr offset, int whence)
+{
+ return real_fseek (bfd_cache_lookup (abfd), offset, whence);
+}
+
+/* Note that archive entries don't have streams; they share their parent's.
+ This allows someone to play with the iostream behind BFD's back.
+
+ Also, note that the origin pointer points to the beginning of a file's
+ contents (0 for non-archive elements). For archive entries this is the
+ first octet in the file, NOT the beginning of the archive header. */
+
+static file_ptr
+cache_bread (struct bfd *abfd, void *buf, file_ptr nbytes)
+{
+ file_ptr nread;
+ /* FIXME - this looks like an optimization, but it's really to cover
+ up for a feature of some OSs (not solaris - sigh) that
+ ld/pe-dll.c takes advantage of (apparently) when it creates BFDs
+ internally and tries to link against them. BFD seems to be smart
+ enough to realize there are no symbol records in the "file" that
+ doesn't exist but attempts to read them anyway. On Solaris,
+ attempting to read zero bytes from a NULL file results in a core
+ dump, but on other platforms it just returns zero bytes read.
+ This makes it to something reasonable. - DJ */
+ if (nbytes == 0)
+ return 0;
+
+#if defined (__VAX) && defined (VMS)
+ /* Apparently fread on Vax VMS does not keep the record length
+ information. */
+ nread = read (fileno (bfd_cache_lookup (abfd)), buf, nbytes);
+ /* Set bfd_error if we did not read as much data as we expected. If
+ the read failed due to an error set the bfd_error_system_call,
+ else set bfd_error_file_truncated. */
+ if (nread == (file_ptr)-1)
+ {
+ bfd_set_error (bfd_error_system_call);
+ return -1;
+ }
+#else
+ nread = fread (buf, 1, nbytes, bfd_cache_lookup (abfd));
+ /* Set bfd_error if we did not read as much data as we expected. If
+ the read failed due to an error set the bfd_error_system_call,
+ else set bfd_error_file_truncated. */
+ if (nread < nbytes && ferror (bfd_cache_lookup (abfd)))
+ {
+ bfd_set_error (bfd_error_system_call);
+ return -1;
+ }
+#endif
+ return nread;
+}
+
+static file_ptr
+cache_bwrite (struct bfd *abfd, const void *where, file_ptr nbytes)
+{
+ file_ptr nwrite = fwrite (where, 1, nbytes, bfd_cache_lookup (abfd));
+ if (nwrite < nbytes && ferror (bfd_cache_lookup (abfd)))
+ {
+ bfd_set_error (bfd_error_system_call);
+ return -1;
+ }
+ return nwrite;
+}
+
+static int
+cache_bclose (struct bfd *abfd)
+{
+ return bfd_cache_close (abfd);
+}
+
+static int
+cache_bflush (struct bfd *abfd)
+{
+ int sts = fflush (bfd_cache_lookup (abfd));
+ if (sts < 0)
+ bfd_set_error (bfd_error_system_call);
+ return sts;
+}
+
+static int
+cache_bstat (struct bfd *abfd, struct stat *sb)
+{
+ int sts = fstat (fileno (bfd_cache_lookup (abfd)), sb);
+ if (sts < 0)
+ bfd_set_error (bfd_error_system_call);
+ return sts;
+}
+
+static const struct bfd_iovec cache_iovec = {
+ &cache_bread, &cache_bwrite, &cache_btell, &cache_bseek,
+ &cache_bclose, &cache_bflush, &cache_bstat
+};
+
/*
INTERNAL_FUNCTION
BFD_CACHE_MAX_OPEN macro
if (! close_one ())
return FALSE;
}
+ abfd->iovec = &cache_iovec;
insert (abfd);
++open_files;
return TRUE;
bfd_boolean
bfd_cache_close (bfd *abfd)
{
- if (abfd->iostream == NULL
- || (abfd->flags & BFD_IN_MEMORY) != 0)
+ if (abfd->iovec != &cache_iovec)
return TRUE;
return bfd_cache_delete (abfd);
unsigned int bfd_log2 (bfd_vma x);
/* Extracted from bfdio.c. */
+struct bfd_iovec
+{
+ /* To avoid problems with macros, a "b" rather than "f"
+ prefix is prepended to each method name. */
+ /* Attempt to read/write NBYTES on ABFD's IOSTREAM storing/fetching
+ bytes starting at PTR. Return the number of bytes actually
+ transfered (a read past end-of-file returns less than NBYTES),
+ or -1 (setting <<bfd_error>>) if an error occurs. */
+ file_ptr (*bread) (struct bfd *abfd, void *ptr, file_ptr nbytes);
+ file_ptr (*bwrite) (struct bfd *abfd, const void *ptr,
+ file_ptr nbytes);
+ /* Return the current IOSTREAM file offset, or -1 (setting <<bfd_error>>
+ if an error occurs. */
+ file_ptr (*btell) (struct bfd *abfd);
+ /* For the following, on successful completion a value of 0 is returned.
+ Otherwise, a value of -1 is returned (and <<bfd_error>> is set). */
+ int (*bseek) (struct bfd *abfd, file_ptr offset, int whence);
+ int (*bclose) (struct bfd *abfd);
+ int (*bflush) (struct bfd *abfd);
+ int (*bstat) (struct bfd *abfd, struct stat *sb);
+};
/* Extracted from bfdwin.c. */
struct _bfd_window_internal {
struct _bfd_window_internal *next;
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;
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 = 0;
/* If the file was open for writing and is now executable,
make it so. */
projects / deliverable / binutils-gdb.git / commitdiff
