// Note: called with the C calling convention.
TEXT runtime·mstart_stub(SB),NOSPLIT,$144
	// R0 points to the m.
	// We are already on m's g0 stack.

	// Save callee-save registers.
	SAVE_R19_TO_R28(8)
	SAVE_F8_TO_F15(88)

	MOVD    m_g0(R0), g
	BL	runtime·save_g(SB)

	BL	runtime·mstart(SB)

	// Restore callee-save registers.
	RESTORE_R19_TO_R28(8)
	RESTORE_F8_TO_F15(88)

	// Go is all done with this OS thread.

	BL	(R11)
	RET

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$176
	// Save callee-save registers in the case of signal forwarding.
	// Please refer to https://golang.org/issue/31827 .
	SAVE_R19_TO_R28(8*4)
	SAVE_F8_TO_F15(8*14)

	// Save arguments.
	MOVW	R0, (8*1)(RSP)	// sig
	MOVD	R1, (8*2)(RSP)	// info
	MOVD	R2, (8*3)(RSP)	// ctx

	// this might be called in external code context,
	// where g is not set.

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$176
	// Save callee-save registers in the case of signal forwarding.
	// Please refer to https://golang.org/issue/31827 .
	SAVE_R19_TO_R28(8*4)
	SAVE_F8_TO_F15(8*14)

	// this might be called in external code context,
	// where g is not set.
	// first save R0, because runtime·load_g will clobber it
	MOVW	R0, 8(RSP)
	MOVBU	runtime·iscgo(SB), R0
	CBZ	R0, 2(PC)

	JMP	(LR)
rest:
	// Save callee-saved registers (Go code won't respect that).
	// 8(RSP) and 16(RSP) are for args passed through racecallback
	SUB	$176, RSP
	MOVD	LR, 0(RSP)

	SAVE_R19_TO_R28(8*3)
	SAVE_F8_TO_F15(8*13)
	MOVD	R29, (8*21)(RSP)
	// Set g = g0.
	// load_g will clobber R0, Save R0
	MOVD	R0, R13
	load_g
	// restore R0
	MOVD	R13, R0
	MOVD	g_m(g), R13
	MOVD	m_g0(R13), R14
	CMP	R14, g