// 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())
TEXT runtime·switchToCrashStack0(SB), NOSPLIT, $0-8
	MOVV	fn+0(FP), REGCTXT	// context register
	MOVV	g_m(g), R4	// curm

	// set g to gcrash
	MOVV	$runtime·gcrash(SB), g	// g = &gcrash

	// ppc64 because the caller is responsible for restoring the TOC.
	MOVD	0(R11), R12	// code pointer
	MOVD	R12, CTR
	BL	(CTR)
#ifndef GOOS_aix
	MOVD	24(R1), R2
#endif
	RET

// func switchToCrashStack0(fn func())
TEXT runtime·switchToCrashStack0<ABIInternal>(SB), NOSPLIT, $0-8
	MOVD	R3, R11				// context register
	MOVD	g_m(g), R3			// curm

	// set g to gcrash
	MOVD	$runtime·gcrash(SB), g	// g = &gcrash