SIGVTALRM
#ifdef SIGVTALRM
[SIGVTALRM] = "Virtual timer expired",
[SIGVTALRM] = "VTALRM",
ksignal(p, SIGVTALRM);
ksignal(p, SIGVTALRM);
{ "vtalrm", SIGVTALRM }, { "prof", SIGPROF },
signal(SIGVTALRM, cleanup);
case SIGVTALRM:
case SIGVTALRM: return("VTALRM");