len:            size,
	})
	p.dstRegisters++
	return true
}

type winCallbackKey struct {
	fn    *funcval
	cdecl bool
}

func callbackasm()

// callbackasmAddr returns address of runtime.callbackasm
// function adjusted by i.
// On x86 and amd64, runtime.callbackasm is a series of CALL instructions,
// and we want callback to arrive at