MOV	m_curg(T0), g
	CALL	runtime·save_g(SB)
	MOV	(g_sched+gobuf_sp)(g), X2
	MOV	ZERO, (g_sched+gobuf_sp)(g)
	RET

noswitch:
	// already on m stack, just call directly
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOV	0(CTXT), T1	// code pointer
	ADD	$8, X2
	JMP	(T1)

// func switchToCrashStack0(fn func())

	MOVD	m_curg(R3), g
	BL	runtime·save_g(SB)
	MOVD	(g_sched+gobuf_sp)(g), R15
	MOVD	$0, (g_sched+gobuf_sp)(g)
	RET

noswitch:
	// already on m stack, just call directly
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVD	0(R12), R3	// code pointer
	MOVD	0(R15), LR	// restore LR
	ADD	$8, R15
	BR	(R3)

// func switchToCrashStack0(fn func())

	MOVV	m_curg(R4), g
	JAL	runtime·save_g(SB)
	MOVV	(g_sched+gobuf_sp)(g), R3
	MOVV	R0, (g_sched+gobuf_sp)(g)
	RET

noswitch:
	// already on m stack, just call directly
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVV	0(REGCTXT), R4	// code pointer
	MOVV	0(R3), R1	// restore LR
	ADDV	$8, R3
	JMP	(R4)

// func switchToCrashStack0(fn func())

	MOVW	m_curg(R1), g
	JAL	runtime·save_g(SB)
	MOVW	(g_sched+gobuf_sp)(g), R29
	MOVW	R0, (g_sched+gobuf_sp)(g)
	RET

noswitch:
	// already on m stack, just call directly
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVW	0(REGCTXT), R4	// code pointer
	MOVW	0(R29), R31	// restore LR
	ADD	$4, R29
	JMP	(R4)

// func switchToCrashStack0(fn func())

	MOVW	g_m(g), R1
	MOVW	m_curg(R1), R0
	BL	setg<>(SB)
	MOVW	(g_sched+gobuf_sp)(g), R13
	MOVW	$0, R3
	MOVW	R3, (g_sched+gobuf_sp)(g)
	RET

noswitch:
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVW	R0, R7
	MOVW	0(R0), R0
	MOVW.P	4(R13), R14	// restore LR
	B	(R0)

// func switchToCrashStack0(fn func())

	MOVL	AX, g(CX)
	MOVL	(g_sched+gobuf_sp)(AX), SP
	MOVL	$0, (g_sched+gobuf_sp)(AX)
	RET

noswitch:
	// already on system stack; tail call the function
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVL	DI, DX
	MOVL	0(DI), DI
	JMP	DI

bad:
	// Bad: g is not gsignal, not g0, not curg. What is it?
	// Hide call from linker nosplit analysis.

	MOVD	(g_sched+gobuf_bp)(g), R29
	MOVD	$0, (g_sched+gobuf_sp)(g)
	MOVD	$0, (g_sched+gobuf_bp)(g)
	RET

noswitch:
	// already on m stack, just call directly
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVD	0(R26), R3	// code pointer
	MOVD.P	16(RSP), R30	// restore LR
	SUB	$8, RSP, R29	// restore FP
	B	(R3)

// func switchToCrashStack0(fn func())

	MOVQ	(g_sched+gobuf_bp)(AX), BP
	MOVQ	$0, (g_sched+gobuf_sp)(AX)
	MOVQ	$0, (g_sched+gobuf_bp)(AX)
	RET

noswitch:
	// already on m stack; tail call the function
	// Using a tail call here cleans up tracebacks since we won't stop
	// at an intermediate systemstack.
	MOVQ	DI, DX
	MOVQ	0(DI), DI
	// The function epilogue is not called on a tail call.
	// Pop BP from the stack to simulate it.
	POPQ	BP
	JMP	DI

    ```
    """

    def __init__(
        self: AppType,
        *,
        debug: Annotated[
            bool,
            Doc(
                """
                Boolean indicating if debug tracebacks should be returned on server
                errors.

                Read more in the
                [Starlette docs for Applications](https://www.starlette.io/applications/#instantiating-the-application).