August 27, 2008

CPU Rings, Privilege, and Protection

You probably know intuitively that applications have limited powers in Intel x86 computers and that only operating system code can perform certain tasks, but do you know how this really works? This post takes a look at x86 privilege levels, the mechanism whereby the OS and CPU conspire to restrict what user-mode programs can do.

Link: osnews.com

Category:

  • Open Source
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