/* Low-level I/O routines for BFDs.
- Copyright (C) 1990-2017 Free Software Foundation, Inc.
+ Copyright (C) 1990-2020 Free Software Foundation, Inc.
Written by Cygnus Support.
#include <limits.h>
#include "bfd.h"
#include "libbfd.h"
+#include "aout/ar.h"
+#if defined (_WIN32)
+#include <windows.h>
+#endif
#ifndef S_IXUSR
#define S_IXUSR 0100 /* Execute by owner. */
In fopen-vms.h, they are separated from the mode with a comma.
Split here. */
vms_attr = strchr (modes, ',');
- if (vms_attr == NULL)
- {
- /* No attributes. */
- return close_on_exec (fopen (filename, modes));
- }
- else
+ if (vms_attr != NULL)
{
/* Attributes found. Split. */
size_t modes_len = strlen (modes) + 1;
}
return close_on_exec (fopen (filename, at[0], at[1], at[2]));
}
-#else /* !VMS */
-#if defined (HAVE_FOPEN64)
+
+#elif defined (_WIN32)
+ size_t filelen = strlen (filename) + 1;
+
+ if (filelen > MAX_PATH - 1)
+ {
+ FILE *file;
+ char* fullpath = (char *) malloc (filelen + 8);
+
+ /* Add a Microsoft recommended prefix that
+ will allow the extra-long path to work. */
+ strcpy (fullpath, "\\\\?\\");
+ strcat (fullpath, filename);
+ file = close_on_exec (fopen (fullpath, modes));
+ free (fullpath);
+ return file;
+ }
+
+#elif defined (HAVE_FOPEN64)
return close_on_exec (fopen64 (filename, modes));
-#else
- return close_on_exec (fopen (filename, modes));
#endif
-#endif /* !VMS */
+
+ return close_on_exec (fopen (filename, modes));
}
/*
bfd_size_type
bfd_bread (void *ptr, bfd_size_type size, bfd *abfd)
{
- size_t nread;
+ file_ptr nread;
+ bfd *element_bfd = abfd;
+ ufile_ptr offset = 0;
+
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ {
+ offset += abfd->origin;
+ abfd = abfd->my_archive;
+ }
+ offset += abfd->origin;
/* If this is an archive element, don't read past the end of
this element. */
- if (abfd->arelt_data != NULL)
+ if (element_bfd->arelt_data != NULL)
{
- bfd_size_type maxbytes = arelt_size (abfd);
+ bfd_size_type maxbytes = arelt_size (element_bfd);
- if (abfd->where + size > maxbytes)
+ if (abfd->where < offset || abfd->where - offset >= maxbytes)
{
- if (abfd->where >= maxbytes)
- return 0;
- size = maxbytes - abfd->where;
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
}
+ if (abfd->where - offset + size > maxbytes)
+ size = maxbytes - (abfd->where - offset);
}
- if (abfd->iovec)
- nread = abfd->iovec->bread (abfd, ptr, size);
- else
- nread = 0;
- if (nread != (size_t) -1)
+ if (abfd->iovec == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ nread = abfd->iovec->bread (abfd, ptr, size);
+ if (nread != -1)
abfd->where += nread;
return nread;
bfd_size_type
bfd_bwrite (const void *ptr, bfd_size_type size, bfd *abfd)
{
- size_t nwrote;
+ file_ptr nwrote;
- if (abfd->iovec)
- nwrote = abfd->iovec->bwrite (abfd, ptr, size);
- else
- nwrote = 0;
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ abfd = abfd->my_archive;
- if (nwrote != (size_t) -1)
+ if (abfd->iovec == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ nwrote = abfd->iovec->bwrite (abfd, ptr, size);
+ if (nwrote != -1)
abfd->where += nwrote;
- if (nwrote != size)
+ if ((bfd_size_type) nwrote != size)
{
#ifdef ENOSPC
errno = ENOSPC;
file_ptr
bfd_tell (bfd *abfd)
{
+ ufile_ptr offset = 0;
file_ptr ptr;
- if (abfd->iovec)
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
{
- bfd *parent_bfd = abfd;
- ptr = abfd->iovec->btell (abfd);
-
- while (parent_bfd->my_archive != NULL
- && !bfd_is_thin_archive (parent_bfd->my_archive))
- {
- ptr -= parent_bfd->origin;
- parent_bfd = parent_bfd->my_archive;
- }
+ offset += abfd->origin;
+ abfd = abfd->my_archive;
}
- else
- ptr = 0;
+ offset += abfd->origin;
+ if (abfd->iovec == NULL)
+ return 0;
+
+ ptr = abfd->iovec->btell (abfd);
abfd->where = ptr;
- return ptr;
+ return ptr - offset;
}
int
bfd_flush (bfd *abfd)
{
- if (abfd->iovec)
- return abfd->iovec->bflush (abfd);
- return 0;
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ abfd = abfd->my_archive;
+
+ if (abfd->iovec == NULL)
+ return 0;
+
+ return abfd->iovec->bflush (abfd);
}
/* Returns 0 for success, negative value for failure (in which case
{
int result;
- if (abfd->iovec)
- result = abfd->iovec->bstat (abfd, statbuf);
- else
- result = -1;
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ abfd = abfd->my_archive;
+
+ if (abfd->iovec == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+ 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_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
- element in an archive. */
-
- BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR);
-
- if (direction == SEEK_CUR && position == 0)
- return 0;
+ ufile_ptr offset = 0;
- if (abfd->my_archive == NULL || bfd_is_thin_archive (abfd->my_archive))
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
{
- if (direction == SEEK_SET && (bfd_vma) position == abfd->where)
- return 0;
+ offset += abfd->origin;
+ abfd = abfd->my_archive;
}
- else
- {
- /* We need something smarter to optimize access to archives.
- Currently, anything inside an archive is read via the file
- handle for the archive. Which means that a bfd_seek on one
- component affects the `current position' in the archive, as
- well as in any other component.
-
- It might be sufficient to put a spike through the cache
- abstraction, and look to the archive for the file position,
- but I think we should try for something cleaner.
+ offset += abfd->origin;
- In the meantime, no optimization for archives. */
+ if (abfd->iovec == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
}
- file_position = position;
- if (direction == SEEK_SET)
- {
- bfd *parent_bfd = abfd;
+ /* 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
+ element in an archive. */
+ BFD_ASSERT (direction == SEEK_SET || direction == SEEK_CUR);
- while (parent_bfd->my_archive != NULL
- && !bfd_is_thin_archive (parent_bfd->my_archive))
- {
- file_position += parent_bfd->origin;
- parent_bfd = parent_bfd->my_archive;
- }
- }
+ if (direction != SEEK_CUR)
+ position += offset;
- if (abfd->iovec)
- result = abfd->iovec->bseek (abfd, file_position, direction);
- else
- result = -1;
+ if ((direction == SEEK_CUR && position == 0)
+ || (direction == SEEK_SET && (ufile_ptr) position == abfd->where))
+ return 0;
+ result = abfd->iovec->bseek (abfd, position, direction);
if (result != 0)
{
- int hold_errno = errno;
-
- /* Force redetermination of `where' field. */
- bfd_tell (abfd);
-
/* An EINVAL error probably means that the file offset was
absurd. */
- if (hold_errno == EINVAL)
+ if (errno == EINVAL)
bfd_set_error (bfd_error_file_truncated);
else
- {
- bfd_set_error (bfd_error_system_call);
- errno = hold_errno;
- }
+ bfd_set_error (bfd_error_system_call);
}
else
{
/* Adjust `where' field. */
- if (direction == SEEK_SET)
- abfd->where = position;
- else
+ if (direction == SEEK_CUR)
abfd->where += position;
+ else
+ abfd->where = position;
}
+
return result;
}
if (abfd->mtime_set)
return abfd->mtime;
- if (abfd->iovec == NULL)
- return 0;
-
- if (abfd->iovec->bstat (abfd, &buf) != 0)
+ if (bfd_stat (abfd, &buf) != 0)
return 0;
abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */
of space for the 15 bazillon byte table it is about to read.
This function at least allows us to answer the question, "is the
size reasonable?".
+
+ A return value of zero indicates the file size is unknown.
*/
ufile_ptr
bfd_get_size (bfd *abfd)
{
- struct stat buf;
-
- if (abfd->iovec == NULL)
- return 0;
+ /* A size of 0 means we haven't yet called bfd_stat. A size of 1
+ means we have a cached value of 0, ie. unknown. */
+ if (abfd->size <= 1 || bfd_write_p (abfd))
+ {
+ struct stat buf;
- if (abfd->iovec->bstat (abfd, &buf) != 0)
- return 0;
+ if (abfd->size == 1 && !bfd_write_p (abfd))
+ return 0;
- return buf.st_size;
+ if (bfd_stat (abfd, &buf) != 0
+ || buf.st_size == 0
+ || buf.st_size - (ufile_ptr) buf.st_size != 0)
+ {
+ abfd->size = 1;
+ return 0;
+ }
+ abfd->size = buf.st_size;
+ }
+ return abfd->size;
}
/*
ufile_ptr
bfd_get_file_size (bfd *abfd)
{
+ ufile_ptr file_size, archive_size = (ufile_ptr) -1;
+
if (abfd->my_archive != NULL
&& !bfd_is_thin_archive (abfd->my_archive))
- return arelt_size (abfd);
+ {
+ struct areltdata *adata = (struct areltdata *) abfd->arelt_data;
+ archive_size = adata->parsed_size;
+ /* If the archive is compressed we can't compare against file size. */
+ if (memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag,
+ "Z\012", 2) == 0)
+ return archive_size;
+ abfd = abfd->my_archive;
+ }
- return bfd_get_size (abfd);
+ file_size = bfd_get_size (abfd);
+ if (archive_size < file_size)
+ return archive_size;
+ return file_size;
}
/*
int prot, int flags, file_ptr offset,
void **map_addr, bfd_size_type *map_len)
{
- void *ret = (void *)-1;
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ {
+ offset += abfd->origin;
+ abfd = abfd->my_archive;
+ }
+ offset += abfd->origin;
if (abfd->iovec == NULL)
- return ret;
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return (void *) -1;
+ }
return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset,
map_addr, map_len);
projects / deliverable / binutils-gdb.git / blobdiff