MOVW	$sp-4(FP), R7 // caller's SP
	MOVW	LR, m_vdsoPC(R6)
	MOVW	R7, m_vdsoSP(R6)

	MOVW	m_curg(R6), R7

	CMP	g, R7		// Only switch if on curg.
	B.NE	noswitch

	MOVW	m_g0(R6), R7
	MOVW	(g_sched+gobuf_sp)(R7), R13	 // Set SP to g0 stack

noswitch:
	BIC	$0x7, R13	// Align for C code

	// Store g on gsignal's stack, so if we receive a signal
	// during VDSO code we can find the g.

	LEAQ	ret+0(FP), DX
	MOVQ	-8(DX), CX
	MOVQ	CX, m_vdsoPC(BX)
	MOVQ	DX, m_vdsoSP(BX)

	CMPQ	R14, m_curg(BX)	// Only switch if on curg.
	JNE	noswitch

	MOVQ	m_g0(BX), DX
	MOVQ	(g_sched+gobuf_sp)(DX), SP	// Set SP to g0 stack

noswitch:
	SUBQ	$16, SP		// Space for results
	ANDQ	$~15, SP	// Align for C code

	MOVL	$1, DI // CLOCK_MONOTONIC
	LEAQ	0(SP), SI
	MOVQ	runtime·vdsoClockgettimeSym(SB), AX

	MOVD    0(R10), g
	MOVD	g_m(g), R7		// m for g
	MOVD	R1, R16			// callee-saved, preserved across C call
	MOVD	m_g0(R7), R10		// g0 for m
	CMP	R10, g			// same g0?
	BEQ	call			// already on g0
	MOVD	(g_sched+gobuf_sp)(R10), R1 // switch R1
call:
	// prepare frame for C ABI
	SUB	$32, R1			// create frame for callee saving LR, CR, R2 etc.
	RLDCR   $0, R1, $~15, R1	// align SP to 16 bytes
	MOVD	R8, CTR			// R8 = caller addr