binutils-gdb/bfd/compress.c

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bfd/ * Makefile.am (BFD32_LIBS): Add compress.lo. (BFD32_LIBS_CFILES): Add compress.c. (BFD_H_FILES): Likewise. * Makefile.in: Regenerate. * bfd-in2.h: Regenerate. * config.in: Add HAVE_ZLIB_H * configure.in: Add test for libz and zlib.h * configure: Regenerate. * dwarf2.c (read_section): New function. (read_indirect_string): Call new function read_section. (read_abbrevs): Likewise. (decode_line_info): Likewise. (read_debug_ranges): Likewise. (find_line): Call new function read_section when just one .zdebug_info section is found, otherwise read and compress multiple sections. (_bfd_dwarf2_cleanup_debug_info): Free sec_info_ptr. * elf.c (_bfd_elf_make_section_from_shdr): Add zdebug prefix. (special_sections_z): New struct. (special_sections): Refer to special_sections_z. * elfxx-mips.c (_bfd_mips_elf_section_from_shdr): Recognize sections named .zdebug_*. (_bfd_mips_elf_fake_sections): Likewise. * compress.c: New file. (bfd_uncompress_section_contents): New function. bfd/doc/ * Makefile.am (BFD_H_DEP): Add ../compress.c. * Makefile.in: Regenerate. binutils/ * config.in: Add HAVE_ZLIB_H * configure.in: Add test for libz and zlib.h * configure: Regenerate. * dwarf.c (debug_displays): Add .zdebug_* strings. * dwarf.h (struct dwarf_section): Add fields uncompressed_namd and compressed_name. * objdump.c (load_debug_section): Call bfd_uncompress_section_contents when loading a compressed section. (dump_dwarf_section): Recognize compressed section name. (mach_o_dwarf_sections): Rename as mach_o_uncompressed_dwarf_sections. (mach_o_compressed_dwarf_sections): New variable. (generic_dwarf_section): Rename as generic_uncompressed_dwarf_sections. (generic_compressed_dwarf_sections): New variable. (check_mach_o_dwarf): Save and restore mach_o_compressed_dwarf_sections. * readelf.c: Add #include for config.h and zlib.h (process_section_headers): Recognize compressed section name. (uncompress_section_contents): New function. (load_debug_section): Call uncompress_section_contents when loading a compressed section. (display_debug_section): Recognize compressed section name. binutils/testsuite: * binutils-all/objdump.exp: Add test for objdump -s on a file with a compressed debug section. Add test for objdump -W on a file that contains a compressed debug section. * binutils-all/readelf.exp: Call readelf_compressed_wa_test. (readelf_compressed_wa_test): New function. * binutils-all/dw2-compressed.S: New file. * binutils-all/objdump.W: New file. * binutils-all/objdump.s: New file. * binutils-all/readelf.wa: New file.
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/* ELF attributes support (based on ARM EABI attributes).
Copyright 2008
Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "config.h"
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
/*
FUNCTION
bfd_uncompress_section_contents
SYNOPSIS
bfd_boolean bfd_uncompress_section_contents
(bfd_byte **buffer, bfd_size_type *size);
DESCRIPTION
Uncompresses a section that was compressed using zlib, in place. At
the call to this function, *@var{buffer} and *@var{size} should point
to the section contents to be uncompressed. At the end of the
function, *@var{buffer} and *@var{size} will point to the uncompressed
contents. This function assumes *BUFFER was allocated using
bfd_malloc() or equivalent. If the section is not a valid compressed
section, or zlib is not installed on this machine, the input is
unmodified.
Returns @code{FALSE} if unable to uncompress successfully; in that case
the input is unmodified. Otherwise, returns @code{TRUE}.
*/
bfd_boolean
bfd_uncompress_section_contents (bfd_byte **buffer, bfd_size_type *size)
{
#ifndef HAVE_ZLIB_H
/* These are just to quiet gcc. */
buffer = 0;
size = 0;
return FALSE;
#else
bfd_size_type compressed_size = *size;
bfd_byte *compressed_buffer = *buffer;
bfd_size_type uncompressed_size;
bfd_byte *uncompressed_buffer;
z_stream strm;
int rc;
bfd_size_type header_size = 12;
/* Read the zlib header. In this case, it should be "ZLIB" followed
by the uncompressed section size, 8 bytes in big-endian order. */
if (compressed_size < header_size
|| ! CONST_STRNEQ ((char*) compressed_buffer, "ZLIB"))
return FALSE;
uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[11];
/* It is possible the section consists of several compressed
buffers concatenated together, so we uncompress in a loop. */
strm.zalloc = NULL;
strm.zfree = NULL;
strm.opaque = NULL;
strm.avail_in = compressed_size - header_size;
strm.next_in = (Bytef*) compressed_buffer + header_size;
strm.avail_out = uncompressed_size;
Updated soruces in bfd/* to compile cleanly with -Wc++-compat. * bfd/aoutx.h: Add casts. * bfd/archive.c: Add casts. * bfd/archive64.c: Add casts. * bfd/archures.c: Add casts. * bfd/bfd-in2.h: Regenerated. * bfd/bfd.c: Add casts. (enum bfd_direction): Move out to top level. * bfd/bfdio.c: Add casts. * bfd/binary.c: Add casts. * bfd/cache.c (cache_bseek,cache_bread_1,cache_bwrite): Updated parameter to use enum value instead of int. * bfd/coffcode.h: Add casts. * bfd/coffgen.c: Add casts. * bfd/cofflink.c: Add casts. * bfd/compress.c: Add casts. * bfd/dwarf1.c: Add casts. * bfd/dwarf2.c: Add casts. (struct dwarf2_debug): Rename member bfd to bfd_ptr. Update code to use new name. * bfd/elf-attrs.c: Add casts. * bfd/elf-bfd.h (elf_link_virtual_table_entry): Gives name to anonymous struct. (union gotplt_union, struct elf_link_virtual_table_entry): Move to top level. * bfd/elf-eh-frame.c: Add casts. * bfd/elf-strtab.c: Add casts. * bfd/elf.c: Add casts. (_bfd_elm_make_Section_from_phdr): Change argument name from typename to type_name. * bfd/elf32-i386.c: Add casts. * bfd/elf64-x86-64.c: Add casts. * bfd/elfcode.h: Add casts. * bfd/elfcore.h: Add casts. * bfd/elflink.c: Add casts. * bfd/format.c: Add casts. * bfd/hash.c: Add casts. * bfd/ihex.c: Add casts. * bfd/libaout.h (enum aout_subformat, enum aout_magic): Move to top level. * bfd/libbfd.c: Add casts. * bfd/linker.c: Add casts. * bfd/merge.c: Add casts. * bfd/opncls.c: Add casts. * bfd/peXXigen.c: Add casts. * bfd/peicode.h: Add casts. * bfd/reloc.c: Add casts. * bfd/section.c: Add casts. * bfd/simple.c: Add casts. * bfd/srec.c: Add casts. * bfd/stabs.c: Add casts. * bfd/syms.c: Add casts. * bfd/targets.c: Add casts. * bfd/tekhex.c: Add casts. * bfd/verilog.c: Add casts. * include/bfdlink.h (struct bfd_link_hash_common_entry): Move to top level.
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uncompressed_buffer = (bfd_byte *) bfd_malloc (uncompressed_size);
bfd/ * Makefile.am (BFD32_LIBS): Add compress.lo. (BFD32_LIBS_CFILES): Add compress.c. (BFD_H_FILES): Likewise. * Makefile.in: Regenerate. * bfd-in2.h: Regenerate. * config.in: Add HAVE_ZLIB_H * configure.in: Add test for libz and zlib.h * configure: Regenerate. * dwarf2.c (read_section): New function. (read_indirect_string): Call new function read_section. (read_abbrevs): Likewise. (decode_line_info): Likewise. (read_debug_ranges): Likewise. (find_line): Call new function read_section when just one .zdebug_info section is found, otherwise read and compress multiple sections. (_bfd_dwarf2_cleanup_debug_info): Free sec_info_ptr. * elf.c (_bfd_elf_make_section_from_shdr): Add zdebug prefix. (special_sections_z): New struct. (special_sections): Refer to special_sections_z. * elfxx-mips.c (_bfd_mips_elf_section_from_shdr): Recognize sections named .zdebug_*. (_bfd_mips_elf_fake_sections): Likewise. * compress.c: New file. (bfd_uncompress_section_contents): New function. bfd/doc/ * Makefile.am (BFD_H_DEP): Add ../compress.c. * Makefile.in: Regenerate. binutils/ * config.in: Add HAVE_ZLIB_H * configure.in: Add test for libz and zlib.h * configure: Regenerate. * dwarf.c (debug_displays): Add .zdebug_* strings. * dwarf.h (struct dwarf_section): Add fields uncompressed_namd and compressed_name. * objdump.c (load_debug_section): Call bfd_uncompress_section_contents when loading a compressed section. (dump_dwarf_section): Recognize compressed section name. (mach_o_dwarf_sections): Rename as mach_o_uncompressed_dwarf_sections. (mach_o_compressed_dwarf_sections): New variable. (generic_dwarf_section): Rename as generic_uncompressed_dwarf_sections. (generic_compressed_dwarf_sections): New variable. (check_mach_o_dwarf): Save and restore mach_o_compressed_dwarf_sections. * readelf.c: Add #include for config.h and zlib.h (process_section_headers): Recognize compressed section name. (uncompress_section_contents): New function. (load_debug_section): Call uncompress_section_contents when loading a compressed section. (display_debug_section): Recognize compressed section name. binutils/testsuite: * binutils-all/objdump.exp: Add test for objdump -s on a file with a compressed debug section. Add test for objdump -W on a file that contains a compressed debug section. * binutils-all/readelf.exp: Call readelf_compressed_wa_test. (readelf_compressed_wa_test): New function. * binutils-all/dw2-compressed.S: New file. * binutils-all/objdump.W: New file. * binutils-all/objdump.s: New file. * binutils-all/readelf.wa: New file.
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if (! uncompressed_buffer)
return FALSE;
rc = inflateInit (&strm);
while (strm.avail_in > 0)
{
if (rc != Z_OK)
goto fail;
strm.next_out = ((Bytef*) uncompressed_buffer
+ (uncompressed_size - strm.avail_out));
rc = inflate (&strm, Z_FINISH);
if (rc != Z_STREAM_END)
goto fail;
rc = inflateReset (&strm);
}
rc = inflateEnd (&strm);
if (rc != Z_OK
|| strm.avail_out != 0)
goto fail;
free (compressed_buffer);
*buffer = uncompressed_buffer;
*size = uncompressed_size;
return TRUE;
fail:
free (uncompressed_buffer);
return FALSE;
#endif /* HAVE_ZLIB_H */
}