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binutils
fix-pr23919-1.diff
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File fix-pr23919-1.diff of Package binutils
From 4207142d6a5d2359170c5f9a140fc1a2351fbda9 Mon Sep 17 00:00:00 2001 From: Mark Wielaard <mark@klomp.org> Date: Tue, 27 Nov 2018 11:59:10 +0000 Subject: [PATCH] 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. --- bfd/ChangeLog | 19 +++++++++++++ bfd/bfd-in2.h | 6 ++-- bfd/bfd.c | 20 ++++++++++---- bfd/compress.c | 35 +++++++++++++++++------- bfd/elf.c | 5 ++-- binutils/ChangeLog | 9 ++++++ binutils/readelf.c | 18 ------------ binutils/testsuite/binutils-all/dw2-3.rS | 2 +- binutils/testsuite/binutils-all/dw2-3.rt | 2 +- 9 files changed, 77 insertions(+), 39 deletions(-) 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 -- 2.19.1
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