static bfd_size_type
bfd_compress_section_contents (bfd *abfd, sec_ptr sec,
bfd_byte *uncompressed_buffer,
bfd_size_type uncompressed_size)
{
uLong compressed_size;
bfd_byte *buffer;
bfd_size_type buffer_size;
bfd_boolean decompress;
#if defined(__GNUC__) && GCC_VERSION < 4007
/* Work around a GCC uninitialized warning bug fixed in GCC 4.7. */
int zlib_size = 0;
#else
int zlib_size;
#endif
int orig_compression_header_size;
int compression_header_size
= bfd_get_compression_header_size (abfd, NULL);
bfd_boolean compressed
= bfd_is_section_compressed_with_header (abfd, sec,
&orig_compression_header_size);
if (compressed)
{
/* We shouldn't decompress unsupported compressed section. */
if (orig_compression_header_size < 0)
abort ();
/* Different compression schemes. Just move the compressed section
contents to the right position. */
if (orig_compression_header_size == 0)
{
/* Convert it from .zdebug* section. Get the uncompressed
size first. */
zlib_size = uncompressed_size;
compressed_size = zlib_size + compression_header_size;
uncompressed_size = bfd_getb64 (uncompressed_buffer + 4);
}
else
{
/* Convert it to .zdebug* section. */
zlib_size = uncompressed_size - orig_compression_header_size;
compressed_size = zlib_size;
}
}
else
compressed_size = compressBound (uncompressed_size) + 12;
/* When converting from .zdebug* section, uncompress if it leads to
smaller size. */
if (compressed
&& orig_compression_header_size == 0
&& compressed_size > uncompressed_size)
{
decompress = TRUE;
buffer_size = uncompressed_size;
}
else
{
decompress = FALSE;
buffer_size = compressed_size + compression_header_size;
}
buffer = (bfd_byte *) bfd_alloc (abfd, buffer_size);
if (buffer == NULL)
return 0;
if (compressed)
{
sec->size = uncompressed_size;
if (decompress)
{
if (!decompress_contents (uncompressed_buffer, zlib_size,
buffer, uncompressed_size))
{
bfd_set_error (bfd_error_bad_value);
bfd_release (abfd, buffer);
return 0;
}
free (uncompressed_buffer);
sec->contents = buffer;
sec->compress_status = COMPRESS_SECTION_DONE;
return uncompressed_size;
}
else
{
bfd_update_compression_header (abfd, buffer, sec);
memmove (buffer + compression_header_size,
uncompressed_buffer + orig_compression_header_size,
zlib_size);
}
}
else
{
bfd_size_type size = uncompressed_size;
int header_size = 12 + compression_header_size;
if (compress ((Bytef*) buffer + header_size,
&compressed_size,
(const Bytef*) uncompressed_buffer,
uncompressed_size) != Z_OK)
{
bfd_release (abfd, buffer);
bfd_set_error (bfd_error_bad_value);
return 0;
}
compressed_size += header_size;
/* PR binutils/18087: If compression didn't make the section smaller,
just keep it uncompressed. */
if (compressed_size < uncompressed_size)
{
bfd_update_compression_header (abfd, buffer, sec);
/* Write the zlib header. In this case, it should be "ZLIB"
followed by the uncompressed section size, 8 bytes in
big-endian order. */
memcpy (buffer + compression_header_size, "ZLIB", 4);
bfd_putb64 (size, buffer + compression_header_size + 4);
}
else
{
/* NOTE: There is a small memory leak here since
uncompressed_buffer is malloced and won't be freed. */
bfd_release (abfd, buffer);
sec->contents = uncompressed_buffer;
sec->compress_status = COMPRESS_SECTION_NONE;
return uncompressed_size;
}
}
free (uncompressed_buffer);
sec->contents = buffer;
sec->size = compressed_size;
sec->compress_status = COMPRESS_SECTION_DONE;
return uncompressed_size;
}
static bfd_size_type
bfd_compress_section_contents (bfd *abfd, sec_ptr sec,
bfd_byte *uncompressed_buffer,
bfd_size_type uncompressed_size)
{
uLong compressed_size;
bfd_byte *buffer;
bfd_size_type buffer_size;
bfd_boolean decompress;
int zlib_size = 0;
int orig_compression_header_size;
bfd_size_type orig_uncompressed_size;
int header_size = bfd_get_compression_header_size (abfd, NULL);
bfd_boolean compressed
= bfd_is_section_compressed_with_header (abfd, sec,
&orig_compression_header_size,
&orig_uncompressed_size);
/* Either ELF compression header or the 12-byte, "ZLIB" + 8-byte size,
overhead in .zdebug* section. */
if (!header_size)
header_size = 12;
if (compressed)
{
/* We shouldn't decompress unsupported compressed section. */
if (orig_compression_header_size < 0)
abort ();
/* Different compression schemes. Just move the compressed section
contents to the right position. */
if (orig_compression_header_size == 0)
{
/* Convert it from .zdebug* section. Get the uncompressed
size first. We need to substract the 12-byte overhead in
.zdebug* section. Set orig_compression_header_size to
the 12-bye overhead. */
orig_compression_header_size = 12;
zlib_size = uncompressed_size - 12;
}
else
{
/* Convert it to .zdebug* section. */
zlib_size = uncompressed_size - orig_compression_header_size;
}
/* Add the header size. */
compressed_size = zlib_size + header_size;
}
else
compressed_size = compressBound (uncompressed_size) + header_size;
/* Uncompress if it leads to smaller size. */
if (compressed && compressed_size > orig_uncompressed_size)
{
decompress = TRUE;
buffer_size = orig_uncompressed_size;
}
else
{
decompress = FALSE;
buffer_size = compressed_size;
}
buffer = (bfd_byte *) bfd_alloc (abfd, buffer_size);
if (buffer == NULL)
return 0;
if (compressed)
{
sec->size = orig_uncompressed_size;
if (decompress)
{
if (!decompress_contents (uncompressed_buffer
+ orig_compression_header_size,
zlib_size, buffer, buffer_size))
{
bfd_set_error (bfd_error_bad_value);
bfd_release (abfd, buffer);
return 0;
}
free (uncompressed_buffer);
sec->contents = buffer;
sec->compress_status = COMPRESS_SECTION_DONE;
return orig_uncompressed_size;
}
else
{
bfd_update_compression_header (abfd, buffer, sec);
memmove (buffer + header_size,
uncompressed_buffer + orig_compression_header_size,
zlib_size);
}
}
else
{
if (compress ((Bytef*) buffer + header_size,
&compressed_size,
(const Bytef*) uncompressed_buffer,
uncompressed_size) != Z_OK)
{
bfd_release (abfd, buffer);
bfd_set_error (bfd_error_bad_value);
return 0;
}
compressed_size += header_size;
/* PR binutils/18087: If compression didn't make the section smaller,
just keep it uncompressed. */
if (compressed_size < uncompressed_size)
bfd_update_compression_header (abfd, buffer, sec);
else
{
/* NOTE: There is a small memory leak here since
uncompressed_buffer is malloced and won't be freed. */
bfd_release (abfd, buffer);
sec->contents = uncompressed_buffer;
sec->compress_status = COMPRESS_SECTION_NONE;
return uncompressed_size;
}
}
free (uncompressed_buffer);
sec->contents = buffer;
sec->size = compressed_size;
sec->compress_status = COMPRESS_SECTION_DONE;
return uncompressed_size;
}
bfd_boolean
bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr)
{
bfd_size_type sz;
bfd_byte *p = *ptr;
bfd_boolean ret;
bfd_size_type save_size;
bfd_size_type save_rawsize;
bfd_byte *compressed_buffer;
unsigned int compression_header_size;
if (abfd->direction != write_direction && sec->rawsize != 0)
sz = sec->rawsize;
else
sz = sec->size;
if (sz == 0)
{
*ptr = NULL;
return TRUE;
}
switch (sec->compress_status)
{
case COMPRESS_SECTION_NONE:
if (p == NULL)
{
p = (bfd_byte *) bfd_malloc (sz);
if (p == NULL)
return FALSE;
}
if (!bfd_get_section_contents (abfd, sec, p, 0, sz))
{
if (*ptr != p)
free (p);
return FALSE;
}
*ptr = p;
return TRUE;
case DECOMPRESS_SECTION_SIZED:
/* Read in the full compressed section contents. */
compressed_buffer = (bfd_byte *) bfd_malloc (sec->compressed_size);
if (compressed_buffer == NULL)
return FALSE;
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 = sec->compressed_size;
sec->compress_status = COMPRESS_SECTION_NONE;
ret = bfd_get_section_contents (abfd, sec, compressed_buffer,
0, sec->compressed_size);
/* Restore rawsize and size. */
sec->rawsize = save_rawsize;
sec->size = save_size;
sec->compress_status = DECOMPRESS_SECTION_SIZED;
if (!ret)
goto fail_compressed;
if (p == NULL)
p = (bfd_byte *) bfd_malloc (sz);
if (p == NULL)
goto fail_compressed;
compression_header_size = bfd_get_compression_header_size (abfd, sec);
if (!decompress_contents (compressed_buffer + compression_header_size,
sec->compressed_size, p, sz))
{
bfd_set_error (bfd_error_bad_value);
if (p != *ptr)
free (p);
fail_compressed:
free (compressed_buffer);
return FALSE;
}
free (compressed_buffer);
*ptr = p;
return TRUE;
case COMPRESS_SECTION_DONE:
if (sec->contents == NULL)
return FALSE;
if (p == NULL)
{
p = (bfd_byte *) bfd_malloc (sz);
if (p == NULL)
return FALSE;
*ptr = p;
}
/* PR 17512; file: 5bc29788. */
if (p != sec->contents)
memcpy (p, sec->contents, sz);
return TRUE;
default:
abort ();
}
}
bfd_boolean
bfd_get_full_section_contents (bfd *abfd, sec_ptr sec, bfd_byte **ptr)
{
bfd_size_type sz;
bfd_byte *p = *ptr;
bfd_boolean ret;
bfd_size_type save_size;
bfd_size_type save_rawsize;
bfd_byte *compressed_buffer;
unsigned int compression_header_size;
if (abfd->direction != write_direction && sec->rawsize != 0)
sz = sec->rawsize;
else
sz = sec->size;
if (sz == 0)
{
*ptr = NULL;
return TRUE;
}
switch (sec->compress_status)
{
case COMPRESS_SECTION_NONE:
if (p == NULL)
{
p = (bfd_byte *) bfd_malloc (sz);
if (p == NULL)
{
/* PR 20801: Provide a more helpful error message. */
if (bfd_get_error () == bfd_error_no_memory)
_bfd_error_handler
/* xgettext:c-format */
(_("error: %B(%A) is too large (%#lx bytes)"),
abfd, sec, (long) sz);
return FALSE;
}
}
if (!bfd_get_section_contents (abfd, sec, p, 0, sz))
{
if (*ptr != p)
free (p);
return FALSE;
}
*ptr = p;
return TRUE;
case DECOMPRESS_SECTION_SIZED:
/* Read in the full compressed section contents. */
compressed_buffer = (bfd_byte *) bfd_malloc (sec->compressed_size);
if (compressed_buffer == NULL)
return FALSE;
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 = sec->compressed_size;
sec->compress_status = COMPRESS_SECTION_NONE;
ret = bfd_get_section_contents (abfd, sec, compressed_buffer,
0, sec->compressed_size);
/* Restore rawsize and size. */
sec->rawsize = save_rawsize;
sec->size = save_size;
sec->compress_status = DECOMPRESS_SECTION_SIZED;
if (!ret)
goto fail_compressed;
if (p == NULL)
p = (bfd_byte *) bfd_malloc (sz);
if (p == NULL)
goto fail_compressed;
compression_header_size = bfd_get_compression_header_size (abfd, sec);
if (compression_header_size == 0)
/* Set header size to the zlib header size if it is a
SHF_COMPRESSED section. */
compression_header_size = 12;
if (!decompress_contents (compressed_buffer + compression_header_size,
sec->compressed_size, p, sz))
{
bfd_set_error (bfd_error_bad_value);
if (p != *ptr)
free (p);
fail_compressed:
free (compressed_buffer);
return FALSE;
}
free (compressed_buffer);
*ptr = p;
return TRUE;
case COMPRESS_SECTION_DONE:
if (sec->contents == NULL)
return FALSE;
if (p == NULL)
{
p = (bfd_byte *) bfd_malloc (sz);
if (p == NULL)
return FALSE;
*ptr = p;
}
/* PR 17512; file: 5bc29788. */
if (p != sec->contents)
memcpy (p, sec->contents, sz);
return TRUE;
default:
abort ();
}
}
