MOV	X2, S2 // S2,S3,S4 is unchanged by C code
	MOV	g_m(g), S3 // S3 = m

	// Save the old values on stack for reentrant
	MOV	m_vdsoPC(S3), T0
	MOV	T0, 24(X2)
	MOV	m_vdsoSP(S3), T0
	MOV	T0, 32(X2)

	MOV	RA, m_vdsoPC(S3)
	MOV	$ret-8(FP), T1 // caller's SP
	MOV	T1, m_vdsoSP(S3)

	MOV	m_curg(S3), T1
	BNE	g, T1, noswitch

	MOV	m_g0(S3), T1
	MOV	(g_sched+gobuf_sp)(T1), X2

noswitch:

	// Save the old values on stack and restore them on exit,
	// so this function is reentrant.
	MOVV	m_vdsoPC(R24), R11
	MOVV	m_vdsoSP(R24), R7
	MOVV	R11, 8(R3)
	MOVV	R7, 16(R3)

	MOVV    $ret-8(FP), R11 // caller's SP
	MOVV	R1, m_vdsoPC(R24)
	MOVV	R11, m_vdsoSP(R24)

	MOVV	m_curg(R24), R4
	MOVV	g, R5
	BNE	R4, R5, noswitch

	MOVV	m_g0(R24), R4

	// Save the old values on stack and restore them on exit,
	// so this function is reentrant.
	MOVD	m_vdsoPC(R21), R4
	MOVD	m_vdsoSP(R21), R5
	MOVD	R4, 32(R1)
	MOVD	R5, 40(R1)

	MOVD	LR, R14
	MOVD	$ret-FIXED_FRAME(FP), R5 // caller's SP
	MOVD	R14, m_vdsoPC(R21)
	MOVD	R5, m_vdsoSP(R21)

	MOVD	m_curg(R21), R6
	CMP	g, R6
	BNE	noswitch

	MOVD	m_g0(R21), R7