操作系统的实验二:添加系统调用， 学习Linux内核的系统调用，理解、掌握Linux系统调用的实现框架、用户界面、参数传递、进入/返回过程。阅读... ，文件是docx类型，但代码全都在里面-Operating system experiment 2: add the system call,　learn the Linux kernel system call, understand, master the Linux system call implementation framework, user interface, parameter transfer, enter/return process. Read ... , the file is docx type, But the code is all inside