// Switch to curg so that we get a traceback of the Go code
		// leading up to the cgocall, which switched from curg to g0.
		gp = mp.curg
	}
	if sig == _SIGILL || sig == _SIGFPE {
		// It would be nice to know how long the instruction is.
		// Unfortunately, that's complicated to do in general (mostly for x86
		// and s930x, but other archs have non-standard instruction lengths also).