func retpolineDX()
func retpolineBX()
func retpolineBP()
func retpolineSI()
func retpolineDI()
func retpolineR8()
func retpolineR9()
func retpolineR10()
func retpolineR11()
func retpolineR12()
func retpolineR13()
func retpolineR14()
func retpolineR15()

//go:noescape
func asmcgocall_no_g(fn, arg unsafe.Pointer)

//go:systemstack
func asmcgocall_landingpad()