SA_ONSTACK
#define SA_STACK SA_ONSTACK
if (thread->signal_stack_enabled && (action->sa_flags & SA_ONSTACK) != 0
(action->sa_flags & SA_ONSTACK) != 0 && (
(action->sa_flags & SA_ONSTACK) != 0 && (
&& (action->sa_flags & SA_ONSTACK) != 0
&& (action->sa_flags & SA_ONSTACK) != 0
action.sa_flags = SA_ONSTACK;
#ifdef SA_ONSTACK
ADD_SA_FLAG(SA_ONSTACK),
newAction.sa_flags = SA_RESTART | SA_ONSTACK;
newAction.sa_flags = SA_ONESHOT | SA_ONSTACK | SA_RESTART;