//    MOVD    0(R10), g              // g = R30
//    MOVD    g_racectx(g), R3       // racectx == ThreadState

// func runtime·RaceRead(addr uintptr)
// Called from instrumented Go code
TEXT	runtime·raceread<ABIInternal>(SB), NOSPLIT, $0-8
	MOVD	R3, R4 // addr
	MOVD	LR, R5 // caller of this?
	// void __tsan_read(ThreadState *thr, void *addr, void *pc);
	MOVD	$__tsan_read(SB), R8
	BR	racecalladdr<>(SB)

	MOVD	R9, R1
	// void __tsan_func_enter(ThreadState *thr, void *pc);
	MOVD	$__tsan_func_enter(SB), R9
	BL	racecall<>(SB)
	RET

// func runtime·racefuncexit()
// Called from instrumented code.
TEXT	runtime·racefuncexit<ABIInternal>(SB), NOSPLIT, $0-0
	load_g
	MOVD	g_racectx(g), R0	// race context
	// void __tsan_func_exit(ThreadState *thr);
	MOVD	$__tsan_func_exit(SB), R9
	JMP	racecall<>(SB)

// which would render runtime.getcallerpc ineffective.
TEXT	runtime·raceread<ABIInternal>(SB), NOSPLIT, $0-8
	MOVQ	AX, RARG1
	MOVQ	(SP), RARG2
	// void __tsan_read(ThreadState *thr, void *addr, void *pc);
	MOVQ	$__tsan_read(SB), AX
	JMP	racecalladdr<>(SB)

// func runtime·RaceRead(addr uintptr)
TEXT	runtime·RaceRead(SB), NOSPLIT, $0-8

	MOVD	g_racectx(g), R2		// ThreadState *.
	BL	racecall<>(SB)
	MOVD	R6, R1				// Restore target function.
	MOVD	g_racectx(g), R2		// ThreadState *.
	MOVD	8(R15), R3			// Caller PC.
	MOVD	R7, R4				// PC.
	ADD	$24, R15, R5			// Arguments.
	BL	racecall<>(SB)
	MOVD	$__tsan_go_ignore_sync_end(SB), R1
	MOVD	g_racectx(g), R2		// ThreadState *.
	BL	racecall<>(SB)
	RET