diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2015-05-14 15:58:51 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-05-14 16:02:08 -0700 |
| commit | dab394de9e41de54df5e2310e081e1c550326f5b (patch) | |
| tree | fbdbe4f564baa35e7fb4bea28416a531fcb9d916 /bfd/bfd.c | |
| parent | 61a7418ccb7c2de12d4c4df79e193f32db938a11 (diff) | |
| download | gdb-dab394de9e41de54df5e2310e081e1c550326f5b.zip gdb-dab394de9e41de54df5e2310e081e1c550326f5b.tar.gz gdb-dab394de9e41de54df5e2310e081e1c550326f5b.tar.bz2 | |
Don't add the zlib header to SHF_COMPRESSED section
In a SHF_COMPRESSED compressed section, the raw compressed data should
begin immediately after the compression header. This patch removes the
extra zlib header from the SHF_COMPRESSED section.
bfd/
* bfd.c (bfd_update_compression_header): Also write the zlib
header if the SHF_COMPRESSED bit cleared..
(bfd_check_compression_header): Return the uncompressed size.
* compress.c (decompress_contents): Don't skip the zlib header.
(bfd_compress_section_contents): Properly handle ELFCOMPRESS_ZLIB,
which doesn't have the zlib header.
(bfd_init_section_decompress_status): Likewise.
(bfd_get_full_section_contents): Updated.
(bfd_is_section_compressed): Likewise.
(bfd_is_section_compressed_with_header): Return the uncompressed
size.
* elf.c (_bfd_elf_make_section_from_shdr): Updated.
* bfd-in2.h: Regenerated.
binutils/
* readelf.c (uncompress_section_contents): Add a parameter for
uncompressed size. Don't check the zlib header.
(load_specific_debug_section): Updated.
binutils/testsuite/
* binutils-all/compress.exp: Replace "$OBJDUMP -s -j .debug_info"
with "$OBJDUMP -W".
* binutils-all/libdw2-compressedgabi.out: Updated.
gas/
2015-05-14 H.J. Lu <hongjiu.lu@intel.com>
* write.c (compress_debug): Don't write the zlib header, which
is handled by bfd_update_compression_header.
Diffstat (limited to 'bfd/bfd.c')
| -rw-r--r-- | bfd/bfd.c | 30 |
1 files changed, 21 insertions, 9 deletions
@@ -1998,8 +1998,16 @@ bfd_update_compression_header (bfd *abfd, bfd_byte *contents, } } else - /* Clear the SHF_COMPRESSED bit. */ - elf_section_flags (sec) &= ~SHF_COMPRESSED; + { + /* Clear the SHF_COMPRESSED bit. */ + elf_section_flags (sec) &= ~SHF_COMPRESSED; + + /* Write the zlib header. It should be "ZLIB" followed by + the uncompressed section size, 8 bytes in big-endian + order. */ + memcpy (contents, "ZLIB", 4); + bfd_putb64 (sec->size, contents + 4); + } } } else @@ -2013,11 +2021,12 @@ bfd_update_compression_header (bfd *abfd, bfd_byte *contents, SYNOPSIS bfd_boolean bfd_check_compression_header (bfd *abfd, bfd_byte *contents, asection *sec, - bfd_size_type uncompressed_size); + bfd_size_type *uncompressed_size); DESCRIPTION - Check the compression header at CONTENTS of SEC in ABFD with - the uncompressed size UNCOMPRESSED_SIZE. + Check the compression header at CONTENTS of SEC in ABFD and + store the uncompressed size in UNCOMPRESSED_SIZE if the + compression header is valid. RETURNS Return TRUE if the compression header is valid. @@ -2026,7 +2035,7 @@ RETURNS bfd_boolean bfd_check_compression_header (bfd *abfd, bfd_byte *contents, asection *sec, - bfd_size_type uncompressed_size) + bfd_size_type *uncompressed_size) { if (bfd_get_flavour (abfd) == bfd_target_elf_flavour && (elf_section_flags (sec) & SHF_COMPRESSED) != 0) @@ -2047,9 +2056,12 @@ bfd_check_compression_header (bfd *abfd, bfd_byte *contents, chdr.ch_size = bfd_get_64 (abfd, &echdr->ch_size); chdr.ch_addralign = bfd_get_64 (abfd, &echdr->ch_addralign); } - return (chdr.ch_type == ELFCOMPRESS_ZLIB - && chdr.ch_size == uncompressed_size - && chdr.ch_addralign == 1U << sec->alignment_power); + if (chdr.ch_type == ELFCOMPRESS_ZLIB + && chdr.ch_addralign == 1U << sec->alignment_power) + { + *uncompressed_size = chdr.ch_size; + return TRUE; + } } return FALSE; |