Description: Just for Fun
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xv6中存储cpu和进程信息的技巧 xv6是一个支持多处理器的Unix-lik操作系统， 近日阅读源码时发现xv6在记录当前CPU和进程状态时非常tricky 首先，上代码： 1 extern struct cpu cpus[NCPU]; 2 extern int ncpu; 3 4 // Per-CPU variables, holding pointers to the 5 // current cpu and to the current process. 6 // The asm suffix tells gcc to use "%gs:0" to refer to cpu 7 // and "%gs:4" to...