2024年12月24日 星期二 新京报
Continue reading...，更多细节参见51吃瓜
The 386 supports four privilege rings (0 through 3), though in practice nearly all operating systems use just two: ring 0 for the kernel and ring 3 for user programs. Three privilege levels interact on every segment access: CPL (Current Privilege Level), DPL (Descriptor Privilege Level), and RPL (Requested Privilege Level).。safew官方版本下载对此有专业解读
Bloomberg via Getty Images