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(open_verify): Find .note.ABI-tag notes even in PT_NOTE segments with multiple notes.

This commit is contained in:
Ulrich Drepper 2007-06-30 17:01:07 +00:00
parent 7d9d8bd189
commit 2f6773b574
1 changed files with 24 additions and 7 deletions
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31
elf/dl-load.c
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@ -1634,7 +1634,7 @@ open_verify (const char *name, struct filebuf *fbp, struct link_map *loader,
{
ElfW(Ehdr) *ehdr;
ElfW(Phdr) *phdr, *ph;
ElfW(Word) *abi_note, abi_note_buf[8];
ElfW(Word) *abi_note;
unsigned int osversion;
size_t maplength;
@ -1751,20 +1751,37 @@ open_verify (const char *name, struct filebuf *fbp, struct link_map *loader,
/* Check .note.ABI-tag if present. */
for (ph = phdr; ph < &phdr[ehdr->e_phnum]; ++ph)
if (ph->p_type == PT_NOTE && ph->p_filesz == 32 && ph->p_align >= 4)
if (ph->p_type == PT_NOTE && ph->p_filesz >= 32 && ph->p_align >= 4)
{
if (ph->p_offset + 32 <= (size_t) fbp->len)
ElfW(Addr) size = ph->p_filesz;
if (ph->p_offset + size <= (size_t) fbp->len)
abi_note = (void *) (fbp->buf + ph->p_offset);
else
{
abi_note = alloca (size);
__lseek (fd, ph->p_offset, SEEK_SET);
if (__libc_read (fd, (void *) abi_note_buf, 32) != 32)
if (__libc_read (fd, (void *) abi_note, size) != size)
goto read_error;
abi_note = abi_note_buf;
}
if (memcmp (abi_note, &expected_note, sizeof (expected_note)))
while (memcmp (abi_note, &expected_note, sizeof (expected_note)))
{
#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)
{
size = 0;
break;
}
size -= note_size;
abi_note = (void *) abi_note + note_size;
}
if (size == 0)
continue;
osversion = (abi_note[5] & 0xff) * 65536