Re: Ring 0 Protection ?

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On 7/6/06, Tharindu Rukshan Bamunuarachchi <tharindub@xxxxxxxxx> wrote:

Hi All,

You better ask this as,

What process can not do in ring 0???

Process can do anything, like God.



You can refer Intel's IA-32 architecutre manuals to get more info about
this.

http://www.intel.com/design/pentiumii/manuals/243190.htm


Tharindu
Tharindu,

Your 6 months out of date.

AIUI, Ring 0 now has 2 sub-modes.  The fully priveledged mode you
imply is used for tradional operating systems and for the host os in a
virtual machine (vm) setup.

The new restricted ring 0 sub-mode is designed for guest os'es in a vm setup.
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century

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