event_set_handler
struct intrhand *event_set_handler(int, int (*func)(void *), void *,
rih = event_set_handler(pin, handler, arg, level,
if (event_set_handler(evtchn,
if (event_set_handler(evtch, pirq_interrupt, ih, level, intrname,
if (event_set_handler(evtch,
xenevt_ih = event_set_handler(xenevt_ev, xenevt_processevt, NULL,