/* Compressed section support (intended for debug sections).
- Copyright 2008, 2010, 2011, 2012
- Free Software Foundation, Inc.
+ Copyright (C) 2008-2014 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
+#include "safe-ctype.h"
#ifdef HAVE_ZLIB_H
static bfd_boolean
strm.next_in = (Bytef*) compressed_buffer + 12;
strm.avail_out = uncompressed_size;
+ BFD_ASSERT (Z_OK == 0);
rc = inflateInit (&strm);
while (strm.avail_in > 0 && strm.avail_out > 0)
{
if (rc != Z_OK)
- return FALSE;
+ break;
strm.next_out = ((Bytef*) uncompressed_buffer
+ (uncompressed_size - strm.avail_out));
rc = inflate (&strm, Z_FINISH);
if (rc != Z_STREAM_END)
- return FALSE;
+ break;
rc = inflateReset (&strm);
}
- rc = inflateEnd (&strm);
+ rc |= inflateEnd (&strm);
return rc == Z_OK && strm.avail_out == 0;
}
#endif
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.
*/
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.
}
}
+/*
+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"));
+
+ /* Check for the pathalogical case of a debug string section that
+ contains the string ZLIB.... as the first entry. We assume that
+ no uncompressed .debug_str section would ever be big enough to
+ have the first byte of its (big-endian) size be non-zero. */
+ if (compressed
+ && strcmp (sec->name, ".debug_str") == 0
+ && ISPRINT (compressed_buffer[4]))
+ compressed = FALSE;
+
+ /* Restore compress_status. */
+ sec->compress_status = saved;
+ return compressed;
}
/*