debugCallUnsafePoint = "call not at safe point"
)

func debugCallV2()
func debugCallPanicked(val any)

// debugCallCheck checks whether it is safe to inject a debugger
// function call with return PC pc. If not, it returns a string
// explaining why.
//
//go:nosplit
func debugCallCheck(pc uintptr) string {
	// No user calls from the system stack.
	if getg() != getg().m.curg {
		return debugCallSystemStack
	}

	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.
#define DEBUG_CALL_FN(NAME,MAXSIZE)		\
TEXT NAME(SB),WRAPPER,$MAXSIZE-0;		\
	NO_LOCAL_POINTERS;		\

	MOVQ	r10-(9*8+8)(SP), R10
	MOVQ	r11-(10*8+8)(SP), R11
	MOVQ	r12-(11*8+8)(SP), R12
	MOVQ	r13-(12*8+8)(SP), R13
	MOVQ	r14-(13*8+8)(SP), R14
	MOVQ	r15-(14*8+8)(SP), R15

	RET

// runtime.debugCallCheck assumes that functions defined with the
// DEBUG_CALL_FN macro are safe points to inject calls.
#define DEBUG_CALL_FN(NAME,MAXSIZE)		\
TEXT NAME(SB),WRAPPER,$MAXSIZE-0;		\
	NO_LOCAL_POINTERS;			\