[系统调用FAQ](%E7%B3%BB%E7%BB%9F%E8%B0%83%E7%94%A8FAQ.md) [用户程序如何进行系统调用](%E7%94%A8%E6%88%B7%E7%A8%8B%E5%BA%8F%E5%A6%82%E4%BD%95%E8%BF%9B%E8%A1%8C%E7%B3%BB%E7%BB%9F%E8%B0%83%E7%94%A8.md)