diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/readelflib.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/elf/readelflib.c b/elf/readelflib.c index 26444ad6b2..ea92d89b20 100644 --- a/elf/readelflib.c +++ b/elf/readelflib.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2000, 2001, 2002, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1999 and Jakub Jelinek <jakub@redhat.com>, 1999. @@ -127,16 +127,37 @@ process_elf_file (const char *file_name, const char *lib, int *flag, break; case PT_NOTE: - if (!*osversion && segment->p_filesz == 32 && segment->p_align >= 4) + if (!*osversion && segment->p_filesz >= 32 && segment->p_align >= 4) { ElfW(Word) *abi_note = (ElfW(Word) *) (file_contents + segment->p_offset); - if (abi_note [0] == 4 && abi_note [1] == 16 && abi_note [2] == 1 - && memcmp (abi_note + 3, "GNU", 4) == 0) - *osversion = (abi_note [4] << 24) | - ((abi_note [5] & 0xff) << 16) | - ((abi_note [6] & 0xff) << 8) | - (abi_note [7] & 0xff); + ElfW(Addr) size = segment->p_filesz; + + while (abi_note [0] != 4 || abi_note [1] != 16 + || abi_note [2] != 1 + || memcmp (abi_note + 3, "GNU", 4) != 0) + { +#define ROUND(len) (((len) + sizeof (ElfW(Word)) - 1) & -sizeof (ElfW(Word))) + ElfW(Addr) note_size = 3 * sizeof (ElfW(Word)) + + ROUND (abi_note[0]) + + ROUND (abi_note[1]); + + if (size - 32 < note_size || note_size == 0) + { + size = 0; + break; + } + size -= note_size; + abi_note = (void *) abi_note + note_size; + } + + if (size == 0) + break; + + *osversion = (abi_note [4] << 24) | + ((abi_note [5] & 0xff) << 16) | + ((abi_note [6] & 0xff) << 8) | + (abi_note [7] & 0xff); } break; |