func noted(mode int32) int32

//go:noescape
func nsec(*int64) int64

//go:noescape
func sigtramp(ureg, note unsafe.Pointer)

func setfpmasks()

//go:noescape
func tstart_plan9(newm *m)

func errstr() string

type _Plink uintptr

func sigpanic() {
	gp := getg()
	if !canpanic() {
		throw("unexpected signal during runtime execution")
	}

	SWI	$0
	MOVW	R0, ret+8(FP)
	RET

//func rfork(flags int32) int32
TEXT runtime·rfork(SB),NOSPLIT,$0-8
	MOVW	$SYS_RFORK, R0
	SWI	$0
	MOVW	R0, ret+4(FP)
	RET

//func tstart_plan9(newm *m)
TEXT runtime·tstart_plan9(SB),NOSPLIT,$4-4
	MOVW	newm+0(FP), R1
	MOVW	m_g0(R1), g

	// Layout new m scheduler stack on os stack.
	MOVW	R13, R0
	MOVW	R0, g_stack+stack_hi(g)
	SUB	$(64*1024), R0

Ian Lance Taylor <******@****.***> 1664919339 -0700

		addr = &TCPAddr{IP: ip, Port: port}
	case "udp", "udp4", "udp6":
		addr = &UDPAddr{IP: ip, Port: port}
	default:
		return nil, UnknownNetworkError(net)
	}
	return addr, nil
}

func startPlan9(ctx context.Context, net string, addr Addr) (ctl *os.File, dest, proto, name string, err error) {
	var (
		ip   IP
		port int
	)
	switch a := addr.(type) {
	case *TCPAddr:
		proto = "tcp"
		ip = a.IP