https://blog.wongcw.com/2022/09/13/user-space-hinting%e5%b0%87%e5%8a%a9%e5%8a%9bamd%e9%9c%84%e9%be%8d%e8%99%95%e7%90%86%e5%99%a8%e5%af%a6%e7%8f%be%e6%9b%b4%e5%a5%bd%e7%9a%84%e4%bb%bb%e5%8b%99%e6%80%a7%e8%83%bd%e7%99%bc%e6%8f%ae/