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(_dl_relocate_object): Move PT_GNU_RELRO protection into... (_dl_protect_relro): New routine.

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This commit is contained in:
Ulrich Drepper 2004-01-24 08:33:05 +00:00
parent e151ce7ad3
commit 75631a5763
1 changed files with 16 additions and 14 deletions
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30
elf/dl-reloc.c
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@ -311,23 +311,25 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
/* In case we can protect the data now that the relocations are /* In case we can protect the data now that the relocations are
done, do it. */ done, do it. */
if (l->l_relro_size != 0) if (l->l_relro_size != 0)
{ _dl_protect_relro (l);
ElfW(Addr) start = ((l->l_addr + l->l_relro_addr)
& ~(GL(dl_pagesize) - 1));
ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size)
& ~(GL(dl_pagesize) - 1));
if (start != end
&& __mprotect ((void *) start, end - start, PROT_READ) < 0)
{
errstring = N_("\
cannot apply additional memory protection after relocation");
goto call_error;
}
}
} }
INTDEF (_dl_relocate_object) INTDEF (_dl_relocate_object)
void internal_function
_dl_protect_relro (struct link_map *l)
{
ElfW(Addr) start = ((l->l_addr + l->l_relro_addr) & ~(GL(dl_pagesize) - 1));
ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size)
& ~(GL(dl_pagesize) - 1));
if (start != end
&& __mprotect ((void *) start, end - start, PROT_READ) < 0)
{
const char *errstring = N_("\
cannot apply additional memory protection after relocation");
INTUSE(_dl_signal_error) (errno, l->l_name, NULL, errstring);
}
}
void void
internal_function __attribute_noinline__ internal_function __attribute_noinline__