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PKGBUILDs/core/binutils/0007-PR23919-Handle-ELF-compressed-header-alignment.patch
Kevin Mihelich 7f6d1506b3 core/binutils to 2.31.1-4
2018-12-29 01:25:22 +00:00

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commit 4207142d6a5d2359170c5f9a140fc1a2351fbda9
Author: Mark Wielaard <mark@klomp.org>
Date: Tue Nov 27 11:59:10 2018 +0000
Handle ELF compressed header alignment correctly by setting up the section alignment correctly for the Elf32_Chdr or Elf64_Chdr type and respect the ch_addralign field when decompressing the section data.
PR binutils/23919
binutils* readelf.c (dump_sections_as_strings): Remove bogus addralign check.
(dump_sections_as_bytes): Likewise.
(load_specific_debug_sections): Likewise.
* testsuite/binutils-all/dw2-3.rS: Adjust alignment.
* testsuite/binutils-all/dw2-3.rt: Likewise.
bfd * bfd.c (bfd_update_compression_header): Explicitly set alignment.
(bfd_check_compression_header): Add uncompressed_alignment_power
argument. Check ch_addralign is a power of 2.
* bfd-in2.h: Regenerated.
* compress.c (bfd_compress_section_contents): Get and set
orig_uncompressed_alignment_pow if section is decompressed.
(bfd_is_section_compressed_with_header): Add and get
uncompressed_align_pow_p argument.
(bfd_is_section_compressed): Add uncompressed_align_power argument
to bfd_is_section_compressed_with_header call.
(bfd_init_section_decompress_status): Get and set
uncompressed_alignment_power.
* elf.c (_bfd_elf_make_section_from_shdr): Add
uncompressed_align_power argument to
bfd_is_section_compressed_with_header call.
diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index ee8cd7ef0b..6d92c51cb9 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -7419,7 +7419,8 @@ void bfd_update_compression_header
bfd_boolean bfd_check_compression_header
(bfd *abfd, bfd_byte *contents, asection *sec,
- bfd_size_type *uncompressed_size);
+ bfd_size_type *uncompressed_size,
+ unsigned int *uncompressed_alignment_power);
int bfd_get_compression_header_size (bfd *abfd, asection *sec);
@@ -8006,7 +8007,8 @@ void bfd_cache_section_contents
bfd_boolean bfd_is_section_compressed_with_header
(bfd *abfd, asection *section,
int *compression_header_size_p,
- bfd_size_type *uncompressed_size_p);
+ bfd_size_type *uncompressed_size_p,
+ unsigned int *uncompressed_alignment_power_p);
bfd_boolean bfd_is_section_compressed
(bfd *abfd, asection *section);
diff --git a/bfd/bfd.c b/bfd/bfd.c
index 15becd7ae8..2b658298ea 100644
--- a/bfd/bfd.c
+++ b/bfd/bfd.c
@@ -2332,6 +2332,8 @@ bfd_update_compression_header (bfd *abfd, bfd_byte *contents,
bfd_put_32 (abfd, sec->size, &echdr->ch_size);
bfd_put_32 (abfd, 1 << sec->alignment_power,
&echdr->ch_addralign);
+ /* bfd_log2 (alignof (Elf32_Chdr)) */
+ bfd_set_section_alignment (abfd, sec, 2);
}
else
{
@@ -2342,6 +2344,8 @@ bfd_update_compression_header (bfd *abfd, bfd_byte *contents,
bfd_put_64 (abfd, sec->size, &echdr->ch_size);
bfd_put_64 (abfd, 1 << sec->alignment_power,
&echdr->ch_addralign);
+ /* bfd_log2 (alignof (Elf64_Chdr)) */
+ bfd_set_section_alignment (abfd, sec, 3);
}
}
else
@@ -2354,6 +2358,8 @@ bfd_update_compression_header (bfd *abfd, bfd_byte *contents,
order. */
memcpy (contents, "ZLIB", 4);
bfd_putb64 (sec->size, contents + 4);
+ /* No way to keep the original alignment, just use 1 always. */
+ bfd_set_section_alignment (abfd, sec, 0);
}
}
}
@@ -2368,12 +2374,14 @@ 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,
+ unsigned int *uncompressed_alignment_power);
DESCRIPTION
Check the compression header at CONTENTS of SEC in ABFD and
- store the uncompressed size in UNCOMPRESSED_SIZE if the
- compression header is valid.
+ store the uncompressed size in UNCOMPRESSED_SIZE and the
+ uncompressed data alignment in UNCOMPRESSED_ALIGNMENT_POWER
+ if the compression header is valid.
RETURNS
Return TRUE if the compression header is valid.
@@ -2382,7 +2390,8 @@ RETURNS
bfd_boolean
bfd_check_compression_header (bfd *abfd, bfd_byte *contents,
asection *sec,
- bfd_size_type *uncompressed_size)
+ bfd_size_type *uncompressed_size,
+ unsigned int *uncompressed_alignment_power)
{
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& (elf_section_flags (sec) & SHF_COMPRESSED) != 0)
@@ -2404,9 +2413,10 @@ bfd_check_compression_header (bfd *abfd, bfd_byte *contents,
chdr.ch_addralign = bfd_get_64 (abfd, &echdr->ch_addralign);
}
if (chdr.ch_type == ELFCOMPRESS_ZLIB
- && chdr.ch_addralign == 1U << sec->alignment_power)
+ && chdr.ch_addralign == (1U << bfd_log2 (chdr.ch_addralign)))
{
*uncompressed_size = chdr.ch_size;
+ *uncompressed_alignment_power = bfd_log2 (chdr.ch_addralign);
return TRUE;
}
}
diff --git a/bfd/compress.c b/bfd/compress.c
index 53e566e498..97ea624eb8 100644
--- a/bfd/compress.c
+++ b/bfd/compress.c
@@ -84,11 +84,13 @@ bfd_compress_section_contents (bfd *abfd, sec_ptr sec,
int zlib_size = 0;
int orig_compression_header_size;
bfd_size_type orig_uncompressed_size;
+ unsigned int orig_uncompressed_alignment_pow;
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);
+ &orig_uncompressed_size,
+ &orig_uncompressed_alignment_pow);
/* Either ELF compression header or the 12-byte, "ZLIB" + 8-byte size,
overhead in .zdebug* section. */
@@ -153,6 +155,9 @@ bfd_compress_section_contents (bfd *abfd, sec_ptr sec,
return 0;
}
free (uncompressed_buffer);
+ bfd_set_section_alignment (abfd, sec,
+ orig_uncompressed_alignment_pow);
+
sec->contents = buffer;
sec->compress_status = COMPRESS_SECTION_DONE;
return orig_uncompressed_size;
@@ -364,20 +369,24 @@ SYNOPSIS
bfd_boolean bfd_is_section_compressed_with_header
(bfd *abfd, asection *section,
int *compression_header_size_p,
- bfd_size_type *uncompressed_size_p);
+ bfd_size_type *uncompressed_size_p,
+ unsigned int *uncompressed_alignment_power_p);
DESCRIPTION
Return @code{TRUE} if @var{section} is compressed. Compression
- header size is returned in @var{compression_header_size_p} and
- uncompressed size is returned in @var{uncompressed_size_p}. If
- compression is unsupported, compression header size is returned
- with -1 and uncompressed size is returned with 0.
+ header size is returned in @var{compression_header_size_p},
+ uncompressed size is returned in @var{uncompressed_size_p}
+ and the uncompressed data alignement power is returned in
+ @var{uncompressed_align_pow_p}. If compression is
+ unsupported, compression header size is returned with -1
+ and uncompressed size is returned with 0.
*/
bfd_boolean
bfd_is_section_compressed_with_header (bfd *abfd, sec_ptr sec,
int *compression_header_size_p,
- bfd_size_type *uncompressed_size_p)
+ bfd_size_type *uncompressed_size_p,
+ unsigned int *uncompressed_align_pow_p)
{
bfd_byte header[MAX_COMPRESSION_HEADER_SIZE];
int compression_header_size;
@@ -412,7 +421,8 @@ bfd_is_section_compressed_with_header (bfd *abfd, sec_ptr sec,
if (compression_header_size != 0)
{
if (!bfd_check_compression_header (abfd, header, sec,
- uncompressed_size_p))
+ uncompressed_size_p,
+ uncompressed_align_pow_p))
compression_header_size = -1;
}
/* Check for the pathalogical case of a debug string section that
@@ -449,9 +459,11 @@ bfd_is_section_compressed (bfd *abfd, sec_ptr sec)
{
int compression_header_size;
bfd_size_type uncompressed_size;
+ unsigned int uncompressed_align_power;
return (bfd_is_section_compressed_with_header (abfd, sec,
&compression_header_size,
- &uncompressed_size)
+ &uncompressed_size,
+ &uncompressed_align_power)
&& compression_header_size >= 0
&& uncompressed_size > 0);
}
@@ -480,6 +492,7 @@ bfd_init_section_decompress_status (bfd *abfd, sec_ptr sec)
int compression_header_size;
int header_size;
bfd_size_type uncompressed_size;
+ unsigned int uncompressed_alignment_power = 0;
compression_header_size = bfd_get_compression_header_size (abfd, sec);
if (compression_header_size > MAX_COMPRESSION_HEADER_SIZE)
@@ -508,7 +521,8 @@ bfd_init_section_decompress_status (bfd *abfd, sec_ptr sec)
uncompressed_size = bfd_getb64 (header + 4);
}
else if (!bfd_check_compression_header (abfd, header, sec,
- &uncompressed_size))
+ &uncompressed_size,
+ &uncompressed_alignment_power))
{
bfd_set_error (bfd_error_wrong_format);
return FALSE;
@@ -516,6 +530,7 @@ bfd_init_section_decompress_status (bfd *abfd, sec_ptr sec)
sec->compressed_size = sec->size;
sec->size = uncompressed_size;
+ bfd_set_section_alignment (abfd, sec, uncompressed_alignment_power);
sec->compress_status = DECOMPRESS_SECTION_SIZED;
return TRUE;
diff --git a/bfd/elf.c b/bfd/elf.c
index bebda20195..604971dd4c 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -1177,11 +1177,12 @@ _bfd_elf_make_section_from_shdr (bfd *abfd,
enum { nothing, compress, decompress } action = nothing;
int compression_header_size;
bfd_size_type uncompressed_size;
+ unsigned int uncompressed_align_power;
bfd_boolean compressed
= bfd_is_section_compressed_with_header (abfd, newsect,
&compression_header_size,
- &uncompressed_size);
-
+ &uncompressed_size,
+ &uncompressed_align_power);
if (compressed)
{
/* Compressed section. Check if we should decompress. */
diff --git a/binutils/readelf.c b/binutils/readelf.c
index 39744009ab..afb039f7b7 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -13397,12 +13397,6 @@ dump_section_as_strings (Elf_Internal_Shdr * section, Filedata * filedata)
printable_section_name (filedata, section), chdr.ch_type);
return FALSE;
}
- else if (chdr.ch_addralign != section->sh_addralign)
- {
- warn (_("compressed section '%s' is corrupted\n"),
- printable_section_name (filedata, section));
- return FALSE;
- }
uncompressed_size = chdr.ch_size;
start += compression_header_size;
new_size -= compression_header_size;
@@ -13544,12 +13538,6 @@ dump_section_as_bytes (Elf_Internal_Shdr * section,
printable_section_name (filedata, section), chdr.ch_type);
return FALSE;
}
- else if (chdr.ch_addralign != section->sh_addralign)
- {
- warn (_("compressed section '%s' is corrupted\n"),
- printable_section_name (filedata, section));
- return FALSE;
- }
uncompressed_size = chdr.ch_size;
start += compression_header_size;
new_size -= compression_header_size;
@@ -13719,12 +13707,6 @@ load_specific_debug_section (enum dwarf_section_display_enum debug,
section->name, chdr.ch_type);
return FALSE;
}
- else if (chdr.ch_addralign != sec->sh_addralign)
- {
- warn (_("compressed section '%s' is corrupted\n"),
- section->name);
- return FALSE;
- }
uncompressed_size = chdr.ch_size;
start += compression_header_size;
size -= compression_header_size;
diff --git a/binutils/testsuite/binutils-all/dw2-3.rS b/binutils/testsuite/binutils-all/dw2-3.rS
index f1637e9149..86bc73d9a2 100644
--- a/binutils/testsuite/binutils-all/dw2-3.rS
+++ b/binutils/testsuite/binutils-all/dw2-3.rS
@@ -1,3 +1,3 @@
#...
- +\[[ 0-9]+\] .debug_info +(PROGBITS|MIPS_DWARF) +0+ +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +C +0 +0 +1
+ +\[[ 0-9]+\] .debug_info +(PROGBITS|MIPS_DWARF) +0+ +[0-9a-f]+ +[0-9a-f]+ [0-9a-f]+ +C +0 +0 +(4|8)
#pass
diff --git a/binutils/testsuite/binutils-all/dw2-3.rt b/binutils/testsuite/binutils-all/dw2-3.rt
index f59cbaa22b..74e7f8deca 100644
--- a/binutils/testsuite/binutils-all/dw2-3.rt
+++ b/binutils/testsuite/binutils-all/dw2-3.rt
@@ -1,6 +1,6 @@
#...
+\[[ 0-9]+\] .debug_info
- +(PROGBITS|MIPS_DWARF) +0+ +[0-9a-f]+ +[0-9a-f]+ +[0-9a-f]+ +0 +0 +1
+ +(PROGBITS|MIPS_DWARF) +0+ +[0-9a-f]+ +[0-9a-f]+ +[0-9a-f]+ +0 +0 +(4|8)
+\[0+800\]: COMPRESSED
+ZLIB, 0+9d, 1
#pass
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