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authorUlrich Drepper <drepper@redhat.com>2004-01-13 15:47:32 +0000
committerUlrich Drepper <drepper@redhat.com>2004-01-13 15:47:32 +0000
commitd1fc817ea459ca28979948fbb23ff58a6f3f4a8c (patch)
treecf1b48823190c07959f8b8b769d096fcd739b2f3 /nptl/allocatestack.c
parent0a182a286d84451b70a40948247319ac9723decb (diff)
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Update.
2004-01-13 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/dl-execstack.c: Change interface. Add challenge for caller. * sysdeps/generic/ldsodefs.h: Change declaration and type of hook member in rtld_global appropriately. * elf/dl-support.c: Likewise. * elf/dl-load.c (_dl_map_object_from_fd): Take additional paramter. Pass it on to the changed function. (_dl_map_object): Pass new parameter to _dl_map_object_from_fd.
Diffstat (limited to 'nptl/allocatestack.c')
-rw-r--r--nptl/allocatestack.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index 343dd683d6..02de7f0ed7 100644
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -661,10 +661,16 @@ __deallocate_stack (struct pthread *pd)
}
+extern void *__libc_stack_end;
+
int
internal_function
-__make_stacks_executable (void)
+__make_stacks_executable (void **stack_endp)
{
+ /* Challenge the caller. */
+ if (*stack_endp != __libc_stack_end)
+ return EPERM;
+
#ifdef NEED_SEPARATE_REGISTER_STACK
const size_t pagemask = ~(__getpagesize () - 1);
#endif
@@ -702,7 +708,7 @@ __make_stacks_executable (void)
lll_unlock (stack_cache_lock);
if (err == 0)
- err = _dl_make_stack_executable ();
+ err = _dl_make_stack_executable (stack_endp);
return err;
}