MOVL	4(SP), DI	// f's caller's PC
	MOVL	DI, (m_morebuf+gobuf_pc)(BX)
	LEAL	8(SP), CX	// f's caller's SP
	MOVL	CX, (m_morebuf+gobuf_sp)(BX)
	get_tls(CX)
	MOVL	g(CX), SI
	MOVL	SI, (m_morebuf+gobuf_g)(BX)

	// Call newstack on m->g0's stack.
	MOVL	m_g0(BX), BP
	MOVL	BP, g(CX)
	MOVL	(g_sched+gobuf_sp)(BP), AX
	MOVL	-4(AX), BX	// fault if CALL would, before smashing SP
	MOVL	AX, SP

	MOVD	R30, savedRetAddr-8(SP)

	MOVD	g_m(g), R10

	// Switch to g0 stack.
	MOVD	RSP, R19	// callee-saved, preserved across the CALL
	MOVD	m_g0(R10), R11
	CMP	R11, g
	BEQ	call	// already on g0
	MOVD	(g_sched+gobuf_sp)(R11), R12
	MOVD	R12, RSP
call:
	// Load address of the ret sled into the default register for the return
	// address.
	ADR	ret_sled, R30
	// Clear the lowest 2 bits of fakePC. All ARM64 instructions are four

	MOVQ	g(R12), R14
	MOVQ	g_m(R14), R13

	// Switch to g0 stack.
	MOVQ	SP, R12		// callee-saved, preserved across the CALL
	MOVQ	m_g0(R13), R10
	CMPQ	R10, R14
	JE	call	// already on g0
	MOVQ	(g_sched+gobuf_sp)(R10), SP
call:
	ANDQ	$~15, SP	// alignment for gcc ABI
	CALL	AX
	MOVQ	R12, SP
	RET

// void runtime·libfuzzerCallTraceIntCmp(fn, arg0, arg1, fakePC uintptr)

TEXT	asancall<>(SB), NOSPLIT, $0-0
	MOV	X2, X8		// callee-saved
	BEQZ	g, g0stack	// no g, still on a system stack
	MOV	g_m(g), X21
	MOV	m_g0(X21), X21
	BEQ	X21, g, g0stack

	MOV	(g_sched+gobuf_sp)(X21), X2

g0stack:
	JALR	RA, X14
	MOV	X8, X2

TEXT	msancall<>(SB), NOSPLIT, $0-0
	MOVV	R3, R23         // callee-saved
	BEQ	g, g0stack      // no g, still on a system stack
	MOVV	g_m(g), R14
	MOVV	m_g0(R14), R15
	BEQ	R15, g, g0stack

	MOVV	(g_sched+gobuf_sp)(R15), R9
	MOVV	R9, R3

g0stack:
	JAL	(FARG)
	MOVV	R23, R3

	MOVD	RSP, R19                  // callee-saved
	CBZ	g, g0stack                // no g, still on a system stack
	MOVD	g_m(g), R10
	MOVD	m_g0(R10), R11
	CMP	R11, g
	BEQ	g0stack

	MOVD	(g_sched+gobuf_sp)(R11), R5
	MOVD	R5, RSP

g0stack:
	BL	(FARG)
	MOVD	R19, RSP

TEXT	asancall<>(SB), NOSPLIT, $0-0
	MOVV	R3, R23         // callee-saved
	BEQ	g, g0stack      // no g, still on a system stack
	MOVV	g_m(g), R14
	MOVV	m_g0(R14), R15
	BEQ	R15, g, g0stack

	MOVV	(g_sched+gobuf_sp)(R15), R9
	MOVV	R9, R3

g0stack:
	JAL	(FARG)
	MOVV	R23, R3

	MOVD	RSP, R19                  // callee-saved
	CBZ	g, g0stack                // no g, still on a system stack
	MOVD	g_m(g), R10
	MOVD	m_g0(R10), R11
	CMP	R11, g
	BEQ	g0stack

	MOVD	(g_sched+gobuf_sp)(R11), R4
	MOVD	R4, RSP

g0stack:
	BL	(FARG)
	MOVD	R19, RSP

	CMPQ	R14, $0
	JE	call	// no g; still on a system stack

	MOVQ	g_m(R14), R13
	// Switch to g0 stack.
	MOVQ	m_g0(R13), R10
	CMPQ	R10, R14
	JE	call	// already on g0

	MOVQ	(g_sched+gobuf_sp)(R10), SP
call:
	ANDQ	$~15, SP	// alignment for gcc ABI
	CALL	AX
	MOVQ	R12, SP

	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	FARG, CTR		// address of function to be called