rt_signal_frame_32
struct rt_signal_frame_32 __user *rt_sf;
if (!mctx && next_sp - sp >= sizeof(struct rt_signal_frame_32) &&
rt_sf = (struct rt_signal_frame_32 __user *) (unsigned long) sp;
if (nip == fp + offsetof(struct rt_signal_frame_32,
struct rt_signal_frame_32 __user *sf;
sf = (struct rt_signal_frame_32 __user *) (unsigned long) sp;