valid bool // caller can access []byte fields in the Frame

	// Type is the 1 byte frame type. There are ten standard frame
	// types, but extension frame types may be written by WriteRawFrame
	// and will be returned by ReadFrame (as UnknownFrame).
	Type http2FrameType

	// Flags are the 1 byte of 8 potential bit flags per frame.
	// They are specific to the frame type.
	Flags http2Flags

	pp := s.pp

	s.maxarg = types.RoundUp(s.maxarg, e.stkalign)
	frame := s.maxarg + e.stksize
	if Arch.PadFrame != nil {
		frame = Arch.PadFrame(frame)
	}

	// Fill in argument and frame size.
	pp.Text.To.Type = obj.TYPE_TEXTSIZE
	pp.Text.To.Val = int32(types.RoundUp(f.OwnAux.ArgWidth(), int64(types.RegSize)))
	pp.Text.To.Offset = frame

	p := pp.Text