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).
Source: Computational Materials Science, Volume 266
。旺商聊官方下载对此有专业解读
Get our flagship newsletter with all the headlines you need to start the day. Sign up here.
早春二月，贵州乌江源百里画廊。