Chapter 2: Operating system organization

• 2.0: 操作系统的组织简介(Introduction)
• 2.1: 抽象硬件资源(Abstracting physical resources)
• 2.2: 用户态，内核态以及系统调用(User mode, supervisor mode, and system calls)
• 2.3: 操作系统内核组织(Kernel organization)
• 2.4: xv6系统代码组织(Code: xv6 organization)
• 2.5: 进程概览(Process overview)
• 2.6: xv6启动流程分析(Code: starting xv6, the first process and system call)