/* Compressed section support (intended for debug sections).
- Copyright 2008, 2010
+ Copyright 2008, 2010, 2011, 2012
Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
-#include "config.h"
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
strm.avail_out = uncompressed_size;
rc = inflateInit (&strm);
- while (strm.avail_in > 0)
+ while (strm.avail_in > 0 && strm.avail_out > 0)
{
if (rc != Z_OK)
return FALSE;
field was allocated using bfd_malloc() or equivalent. If zlib
is not installed on this machine, the input is unmodified.
- Return @code{TRUE} if the full section contents is compressed
+ Return @code{TRUE} if the full section contents is compressed
successfully.
*/
compressed_size = compressBound (uncompressed_size) + 12;
compressed_buffer = (bfd_byte *) bfd_malloc (compressed_size);
+ if (compressed_buffer == NULL)
+ return FALSE;
+
if (compress ((Bytef*) compressed_buffer + 12,
&compressed_size,
(const Bytef*) uncompressed_buffer,
DESCRIPTION
Read all data from @var{section} in BFD @var{abfd}, decompress
if needed, and store in @var{*ptr}. If @var{*ptr} is NULL,
- return @var{*ptr} with memory malloc'd by this function.
+ return @var{*ptr} with memory malloc'd by this function.
Return @code{TRUE} if the full section contents is retrieved
successfully.
bfd_boolean
bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr)
{
- bfd_size_type sz = sec->rawsize ? sec->rawsize : sec->size;
+ bfd_size_type sz;
bfd_byte *p = *ptr;
#ifdef HAVE_ZLIB_H
bfd_boolean ret;
- bfd_size_type compressed_size;
- bfd_size_type uncompressed_size;
- bfd_size_type rawsize;
+ bfd_size_type save_size;
+ bfd_size_type save_rawsize;
bfd_byte *compressed_buffer;
- bfd_byte *uncompressed_buffer;
#endif
+ if (abfd->direction != write_direction && sec->rawsize != 0)
+ sz = sec->rawsize;
+ else
+ sz = sec->size;
if (sz == 0)
return TRUE;
return FALSE;
#else
/* Read in the full compressed section contents. */
- uncompressed_size = sec->size;
- compressed_size = sec->compressed_size;
- compressed_buffer = (bfd_byte *) bfd_malloc (compressed_size);
+ compressed_buffer = (bfd_byte *) bfd_malloc (sec->compressed_size);
if (compressed_buffer == NULL)
return FALSE;
- rawsize = sec->rawsize;
+ save_rawsize = sec->rawsize;
+ save_size = sec->size;
/* Clear rawsize, set size to compressed size and set compress_status
to COMPRESS_SECTION_NONE. If the compressed size is bigger than
the uncompressed size, bfd_get_section_contents will fail. */
sec->rawsize = 0;
- sec->size = compressed_size;
+ sec->size = sec->compressed_size;
sec->compress_status = COMPRESS_SECTION_NONE;
ret = bfd_get_section_contents (abfd, sec, compressed_buffer,
- 0, compressed_size);
+ 0, sec->compressed_size);
/* Restore rawsize and size. */
- sec->rawsize = rawsize;
- sec->size = uncompressed_size;
+ sec->rawsize = save_rawsize;
+ sec->size = save_size;
sec->compress_status = DECOMPRESS_SECTION_SIZED;
if (!ret)
goto fail_compressed;
- uncompressed_buffer = (bfd_byte *) bfd_malloc (uncompressed_size);
- if (uncompressed_buffer == NULL)
+ if (p == NULL)
+ p = (bfd_byte *) bfd_malloc (sz);
+ if (p == NULL)
goto fail_compressed;
- if (!decompress_contents (compressed_buffer, compressed_size,
- uncompressed_buffer, uncompressed_size))
+ if (!decompress_contents (compressed_buffer, sec->compressed_size, p, sz))
{
bfd_set_error (bfd_error_bad_value);
- free (uncompressed_buffer);
+ if (p != *ptr)
+ free (p);
fail_compressed:
free (compressed_buffer);
return FALSE;
}
free (compressed_buffer);
- sec->contents = uncompressed_buffer;
- sec->compress_status = COMPRESS_SECTION_DONE;
- /* Fall thru */
+ *ptr = p;
+ return TRUE;
#endif
case COMPRESS_SECTION_DONE:
}
}
+/*
+FUNCTION
+ bfd_cache_section_contents
+
+SYNOPSIS
+ void bfd_cache_section_contents
+ (asection *sec, void *contents);
+
+DESCRIPTION
+ Stash @var(contents) so any following reads of @var(sec) do
+ not need to decompress again.
+*/
+
+void
+bfd_cache_section_contents (asection *sec, void *contents)
+{
+ if (sec->compress_status == DECOMPRESS_SECTION_SIZED)
+ sec->compress_status = COMPRESS_SECTION_DONE;
+ sec->contents = contents;
+ sec->flags |= SEC_IN_MEMORY;
+}
+
+
/*
FUNCTION
bfd_is_section_compressed
bfd_is_section_compressed (bfd *abfd, sec_ptr sec)
{
bfd_byte compressed_buffer [12];
+ unsigned int saved = sec->compress_status;
+ bfd_boolean compressed;
+
+ /* Don't decompress the section. */
+ sec->compress_status = COMPRESS_SECTION_NONE;
/* Read the zlib header. In this case, it should be "ZLIB" followed
by the uncompressed section size, 8 bytes in big-endian order. */
- return (bfd_get_section_contents (abfd, sec, compressed_buffer, 0, 12)
- && CONST_STRNEQ ((char*) compressed_buffer, "ZLIB"));
+ compressed = (bfd_get_section_contents (abfd, sec, compressed_buffer, 0, 12)
+ && CONST_STRNEQ ((char*) compressed_buffer, "ZLIB"));
+
+ /* Restore compress_status. */
+ sec->compress_status = saved;
+ return compressed;
}
/*