return *(*uint32)(unsafe.Pointer(ctxt.sigpc())) == 0xd4200000 // BRK 0
}

func sigctxtStatus(ctxt *sigctxt) uint64 {
	return ctxt.r20()
}

func (h *debugCallHandler) saveSigContext(ctxt *sigctxt) {
	sp := ctxt.sp()
	sp -= 2 * goarch.PtrSize
	ctxt.set_sp(sp)
	*(*uint64)(unsafe.Pointer(uintptr(sp))) = ctxt.lr() // save the current lr

	return *(*uint32)(unsafe.Pointer(ctxt.sigpc())) == 0x7fe00008 // Trap
}

func sigctxtStatus(ctxt *sigctxt) uint64 {
	return ctxt.r20()
}

func (h *debugCallHandler) saveSigContext(ctxt *sigctxt) {
	sp := ctxt.sp()
	sp -= 4 * goarch.PtrSize
	ctxt.set_sp(sp)
	*(*uint64)(unsafe.Pointer(uintptr(sp))) = ctxt.link() // save the current lr

	return *(*byte)(unsafe.Pointer(uintptr(ctxt.rip() - 1))) == 0xcc // INT 3
}

func sigctxtStatus(ctxt *sigctxt) uint64 {
	return ctxt.r12()
}

func (h *debugCallHandler) saveSigContext(ctxt *sigctxt) {
	// Push current PC on the stack.
	rsp := ctxt.rsp() - goarch.PtrSize
	*(*uint64)(unsafe.Pointer(uintptr(rsp))) = ctxt.rip()
	ctxt.set_rsp(rsp)
	// Write the argument frame size.

	switch h.gp.atomicstatus.Load() {
	case _Grunning:
		if getg().m != h.mp {
			println("trap on wrong M", getg().m, h.mp)
			return false
		}
		// Save the signal context
		h.saveSigContext(ctxt)
		// Set PC to debugCallV2.
		ctxt.setsigpc(uint64(abi.FuncPCABIInternal(debugCallV2)))
		// Call injected. Switch to the debugCall protocol.
		testSigtrap = h.handleF
	case _Grunnable:

	LDP	(10*8)(RSP), (R6, R7)
	LDP	(8*8)(RSP), (R4, R5)
	LDP	(6*8)(RSP), (R2, R3)
	LDP	(4*8)(RSP), (R0, R1)

	LDP	-8(RSP), (R29, R27)
	ADD	$288, RSP, RSP // Add 16 more bytes, see saveSigContext
	MOVD	-16(RSP), R30 // restore old lr
	JMP	(R27)

// runtime.debugCallCheck assumes that functions defined with the
// DEBUG_CALL_FN macro are safe points to inject calls.

	MOVD	288(R1), g
	MOVD	16(R1), R31
	// restore old LR
	MOVD	R31, LR
	// restore caller PC
	MOVD	0(R1), CTR
	MOVD	136(R1), R31
	// Add 32 bytes more to compensate for SP change in saveSigContext
	ADD	$352, R1
	JMP	(CTR)
#endif
#define DEBUG_CALL_FN(NAME,MAXSIZE)	\
TEXT NAME(SB),WRAPPER,$MAXSIZE-0;	\
	NO_LOCAL_POINTERS;		\
	MOVD	$0, R20;		\
	TW	$31, R0, R0		\
	MOVD	$1, R20;		\