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authorAl Viro <viro@zeniv.linux.org.uk>2012-12-14 14:09:47 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-12-19 18:07:40 -0500
commit6bf9adfc90370b695cb111116e15fdc0e1906270 (patch)
treeb8e4d369cadad21f33b7a5f7f69d43665f821ddc /kernel
parent9b064fc3f95a8e44e929fdf4d6037334ea03d15b (diff)
downloadlinaro-lsk-6bf9adfc90370b695cb111116e15fdc0e1906270.tar.gz
introduce generic sys_sigaltstack(), switch x86 and um to it
Conditional on CONFIG_GENERIC_SIGALTSTACK; architectures that do not select it are completely unaffected Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/signal.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 887f2fefe20..f05f4c4150d 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3102,6 +3102,12 @@ do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long s
out:
return error;
}
+#ifdef CONFIG_GENERIC_SIGALTSTACK
+SYSCALL_DEFINE2(sigaltstack,const stack_t __user *,uss, stack_t __user *,uoss)
+{
+ return do_sigaltstack(uss, uoss, current_user_stack_pointer());
+}
+#endif
int restore_altstack(const stack_t __user *uss)
{