/* Low-level I/O routines for BFDs.
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
- 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. */
#endif
file_ptr
-real_ftell (FILE *file)
+_bfd_real_ftell (FILE *file)
{
#if defined (HAVE_FTELLO64)
return ftello64 (file);
}
int
-real_fseek (FILE *file, file_ptr offset, int whence)
+_bfd_real_fseek (FILE *file, file_ptr offset, int whence)
{
#if defined (HAVE_FSEEKO64)
return fseeko64 (file, offset, whence);
}
FILE *
-real_fopen (const char *filename, const char *modes)
+_bfd_real_fopen (const char *filename, const char *modes)
{
#ifdef VMS
- char vms_modes[4];
char *vms_attr;
- /* On VMS, fopen allows file attributes as optionnal arguments.
+ /* On VMS, fopen allows file attributes as optional arguments.
We need to use them but we'd better to use the common prototype.
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);
+ int i;
+
+ /* Add a Microsoft recommended prefix that
+ will allow the extra-long path to work. */
+ strcpy (fullpath, "\\\\?\\");
+ strcat (fullpath, filename);
+
+ /* Convert any UNIX style path separators into the DOS form. */
+ for (i = 0; fullpath[i]; i++)
+ {
+ if (IS_UNIX_DIR_SEPARATOR (fullpath[i]))
+ fullpath[i] = '\\';
+ }
+
+ 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));
}
/*
. 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);
+. 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). *}
+. 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);
+. {* Mmap a part of the files. ADDR, LEN, PROT, FLAGS and OFFSET are the usual
+. mmap parameter, except that LEN and OFFSET do not need to be page
+. aligned. Returns (void *)-1 on failure, mmapped address on success.
+. Also write in MAP_ADDR the address of the page aligned buffer and in
+. MAP_LEN the size mapped (a page multiple). Use unmap with MAP_ADDR and
+. MAP_LEN to unmap. *}
+. void *(*bmmap) (struct bfd *abfd, void *addr, bfd_size_type len,
+. int prot, int flags, file_ptr offset,
+. void **map_addr, bfd_size_type *map_len);
.};
+.extern const struct bfd_iovec _bfd_memory_iovec;
+
*/
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;
- /* If this is an archive element, don't read past the end of
- this element. */
- if (abfd->arelt_data != NULL)
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
{
- size_t maxbytes = ((struct areltdata *) abfd->arelt_data)->parsed_size;
- if (size > maxbytes)
- size = maxbytes;
+ offset += abfd->origin;
+ abfd = abfd->my_archive;
}
+ offset += abfd->origin;
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ /* If this is an archive element, don't read past the end of
+ this element. */
+ if (element_bfd->arelt_data != NULL)
{
- struct bfd_in_memory *bim;
- bfd_size_type get;
+ bfd_size_type maxbytes = arelt_size (element_bfd);
- bim = abfd->iostream;
- get = size;
- if (abfd->where + get > bim->size)
+ if (abfd->where < offset || abfd->where - offset >= maxbytes)
{
- if (bim->size < (bfd_size_type) abfd->where)
- get = 0;
- else
- get = bim->size - abfd->where;
- bfd_set_error (bfd_error_file_truncated);
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
}
- memcpy (ptr, bim->buffer + abfd->where, (size_t) get);
- abfd->where += get;
- return get;
+ 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->flags & BFD_IN_MEMORY) != 0)
- {
- struct bfd_in_memory *bim = abfd->iostream;
-
- size = (size_t) size;
- if (abfd->where + size > bim->size)
- {
- bfd_size_type newsize, oldsize;
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ abfd = abfd->my_archive;
- oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
- bim->size = abfd->where + size;
- /* Round up to cut down on memory fragmentation */
- newsize = (bim->size + 127) & ~(bfd_size_type) 127;
- if (newsize > oldsize)
- {
- bim->buffer = bfd_realloc_or_free (bim->buffer, newsize);
- if (bim->buffer == NULL)
- {
- bim->size = 0;
- return 0;
- }
- if (newsize > bim->size)
- memset (bim->buffer + bim->size, 0, newsize - bim->size);
- }
- }
- memcpy (bim->buffer + abfd->where, ptr, (size_t) size);
- abfd->where += size;
- return size;
+ if (abfd->iovec == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
}
- if (abfd->iovec)
- nwrote = abfd->iovec->bwrite (abfd, ptr, size);
- else
- nwrote = 0;
-
- if (nwrote != (size_t) -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->flags & BFD_IN_MEMORY) != 0)
- return abfd->where;
-
- if (abfd->iovec)
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
{
- ptr = abfd->iovec->btell (abfd);
-
- if (abfd->my_archive)
- ptr -= abfd->origin;
+ 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->flags & BFD_IN_MEMORY) != 0)
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ abfd = abfd->my_archive;
+
+ if (abfd->iovec == NULL)
return 0;
- if (abfd->iovec)
- return abfd->iovec->bflush (abfd);
- return 0;
+ return abfd->iovec->bflush (abfd);
}
/* Returns 0 for success, negative value for failure (in which case
{
int result;
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- abort ();
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
+ abfd = abfd->my_archive;
- if (abfd->iovec)
- result = abfd->iovec->bstat (abfd, statbuf);
- else
- result = -1;
+ 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);
+ ufile_ptr offset = 0;
- if (direction == SEEK_CUR && position == 0)
- return 0;
-
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ while (abfd->my_archive != NULL
+ && !bfd_is_thin_archive (abfd->my_archive))
{
- struct bfd_in_memory *bim;
-
- bim = abfd->iostream;
-
- if (direction == SEEK_SET)
- abfd->where = position;
- else
- abfd->where += position;
-
- if (abfd->where > bim->size)
- {
- if (abfd->direction == write_direction
- || abfd->direction == both_direction)
- {
- bfd_size_type newsize, oldsize;
-
- oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
- bim->size = abfd->where;
- /* Round up to cut down on memory fragmentation */
- newsize = (bim->size + 127) & ~(bfd_size_type) 127;
- if (newsize > oldsize)
- {
- bim->buffer = bfd_realloc_or_free (bim->buffer, newsize);
- if (bim->buffer == NULL)
- {
- bim->size = 0;
- return -1;
- }
- memset (bim->buffer + oldsize, 0, newsize - oldsize);
- }
- }
- else
- {
- abfd->where = bim->size;
- bfd_set_error (bfd_error_file_truncated);
- return -1;
- }
- }
- return 0;
+ offset += abfd->origin;
+ abfd = abfd->my_archive;
}
+ offset += abfd->origin;
- if (abfd->format != bfd_archive && abfd->my_archive == 0)
+ if (abfd->iovec == NULL)
{
- if (direction == SEEK_SET && (bfd_vma) position == abfd->where)
- return 0;
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
}
- 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.
- In the meantime, no optimization for archives. */
- }
+ /* 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);
- file_position = position;
- if (direction == SEEK_SET && abfd->my_archive != NULL)
- file_position += abfd->origin;
+ 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)
+ absurd. */
+ 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 */
bfd_get_size
SYNOPSIS
- file_ptr bfd_get_size (bfd *abfd);
+ ufile_ptr bfd_get_size (bfd *abfd);
DESCRIPTION
Return the file size (as read from file system) for the file
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.
*/
-file_ptr
+ufile_ptr
bfd_get_size (bfd *abfd)
{
- struct stat buf;
+ /* 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->size == 1 && !bfd_write_p (abfd))
+ return 0;
+
+ 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;
+}
+
+/*
+FUNCTION
+ bfd_get_file_size
+
+SYNOPSIS
+ ufile_ptr bfd_get_file_size (bfd *abfd);
+
+DESCRIPTION
+ Return the file size (as read from file system) for the file
+ associated with BFD @var{abfd}. It supports both normal files
+ and archive elements.
+
+*/
+
+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))
+ {
+ 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 (adata->arch_header != NULL
+ && memcmp (((struct ar_hdr *) adata->arch_header)->ar_fmag,
+ "Z\012", 2) == 0)
+ return archive_size;
+ abfd = abfd->my_archive;
+ }
+
+ file_size = bfd_get_size (abfd);
+ if (archive_size < file_size)
+ return archive_size;
+ return file_size;
+}
+
+/*
+FUNCTION
+ bfd_mmap
+
+SYNOPSIS
+ void *bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
+ int prot, int flags, file_ptr offset,
+ void **map_addr, bfd_size_type *map_len);
+
+DESCRIPTION
+ Return mmap()ed region of the file, if possible and implemented.
+ LEN and OFFSET do not need to be page aligned. The page aligned
+ address and length are written to MAP_ADDR and MAP_LEN.
+
+*/
- if ((abfd->flags & BFD_IN_MEMORY) != 0)
- return ((struct bfd_in_memory *) abfd->iostream)->size;
+void *
+bfd_mmap (bfd *abfd, void *addr, bfd_size_type len,
+ int prot, int flags, file_ptr offset,
+ void **map_addr, bfd_size_type *map_len)
+{
+ 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 0;
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return (void *) -1;
+ }
- if (abfd->iovec->bstat (abfd, &buf) != 0)
- return 0;
+ return abfd->iovec->bmmap (abfd, addr, len, prot, flags, offset,
+ map_addr, map_len);
+}
+
+/* Memory file I/O operations. */
+
+static file_ptr
+memory_bread (bfd *abfd, void *ptr, file_ptr size)
+{
+ struct bfd_in_memory *bim;
+ bfd_size_type get;
+
+ bim = (struct bfd_in_memory *) abfd->iostream;
+ get = size;
+ if (abfd->where + get > bim->size)
+ {
+ if (bim->size < (bfd_size_type) abfd->where)
+ get = 0;
+ else
+ get = bim->size - abfd->where;
+ bfd_set_error (bfd_error_file_truncated);
+ }
+ memcpy (ptr, bim->buffer + abfd->where, (size_t) get);
+ return get;
+}
+
+static file_ptr
+memory_bwrite (bfd *abfd, const void *ptr, file_ptr size)
+{
+ struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream;
+
+ if (abfd->where + size > bim->size)
+ {
+ bfd_size_type newsize, oldsize;
+
+ oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
+ bim->size = abfd->where + size;
+ /* Round up to cut down on memory fragmentation */
+ newsize = (bim->size + 127) & ~(bfd_size_type) 127;
+ if (newsize > oldsize)
+ {
+ bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize);
+ if (bim->buffer == NULL)
+ {
+ bim->size = 0;
+ return 0;
+ }
+ if (newsize > bim->size)
+ memset (bim->buffer + bim->size, 0, newsize - bim->size);
+ }
+ }
+ memcpy (bim->buffer + abfd->where, ptr, (size_t) size);
+ return size;
+}
+
+static file_ptr
+memory_btell (bfd *abfd)
+{
+ return abfd->where;
+}
+
+static int
+memory_bseek (bfd *abfd, file_ptr position, int direction)
+{
+ file_ptr nwhere;
+ struct bfd_in_memory *bim;
+
+ bim = (struct bfd_in_memory *) abfd->iostream;
+
+ if (direction == SEEK_SET)
+ nwhere = position;
+ else
+ nwhere = abfd->where + position;
+
+ if (nwhere < 0)
+ {
+ abfd->where = 0;
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((bfd_size_type)nwhere > bim->size)
+ {
+ if (abfd->direction == write_direction
+ || abfd->direction == both_direction)
+ {
+ bfd_size_type newsize, oldsize;
+
+ oldsize = (bim->size + 127) & ~(bfd_size_type) 127;
+ bim->size = nwhere;
+ /* Round up to cut down on memory fragmentation */
+ newsize = (bim->size + 127) & ~(bfd_size_type) 127;
+ if (newsize > oldsize)
+ {
+ bim->buffer = (bfd_byte *) bfd_realloc_or_free (bim->buffer, newsize);
+ if (bim->buffer == NULL)
+ {
+ errno = EINVAL;
+ bim->size = 0;
+ return -1;
+ }
+ memset (bim->buffer + oldsize, 0, newsize - oldsize);
+ }
+ }
+ else
+ {
+ abfd->where = bim->size;
+ errno = EINVAL;
+ bfd_set_error (bfd_error_file_truncated);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int
+memory_bclose (struct bfd *abfd)
+{
+ struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream;
+
+ free (bim->buffer);
+ free (bim);
+ abfd->iostream = NULL;
- return buf.st_size;
+ return 0;
}
+
+static int
+memory_bflush (bfd *abfd ATTRIBUTE_UNUSED)
+{
+ return 0;
+}
+
+static int
+memory_bstat (bfd *abfd, struct stat *statbuf)
+{
+ struct bfd_in_memory *bim = (struct bfd_in_memory *) abfd->iostream;
+
+ memset (statbuf, 0, sizeof (*statbuf));
+ statbuf->st_size = bim->size;
+
+ return 0;
+}
+
+static void *
+memory_bmmap (bfd *abfd ATTRIBUTE_UNUSED, void *addr ATTRIBUTE_UNUSED,
+ bfd_size_type len ATTRIBUTE_UNUSED, int prot ATTRIBUTE_UNUSED,
+ int flags ATTRIBUTE_UNUSED, file_ptr offset ATTRIBUTE_UNUSED,
+ void **map_addr ATTRIBUTE_UNUSED,
+ bfd_size_type *map_len ATTRIBUTE_UNUSED)
+{
+ return (void *)-1;
+}
+
+const struct bfd_iovec _bfd_memory_iovec =
+{
+ &memory_bread, &memory_bwrite, &memory_btell, &memory_bseek,
+ &memory_bclose, &memory_bflush, &memory_bstat, &memory_bmmap
+};
projects / deliverable / binutils-gdb.git / blobdiff