if level > 0 {
		goroutineheader(gp)
		tracebacktrap(c.pc(), c.sp(), c.lr(), gp)
		tracebackothers(gp)
		print("\n")
		dumpregs(_ureg)
	}
	if docrash {
		crash()
	}
Exit:
	goexitsall(note)
	exits(note)
	return _NDFLT // not reached
}

func sigenable(sig uint32) {
}

func sigdisable(sig uint32) {
}

func sigignore(sig uint32) {
}