/proc/cpuinfo missing sep flag

Dave Jones davej at redhat.com
Mon Apr 17 23:18:48 UTC 2006


On Mon, Apr 17, 2006 at 07:15:38PM -0400, Jim Cromie wrote:

 > This is pretty obscure, and I havent seen any problems because of it,
 > but it is a bit odd.
 > 
 > Can someone(s)
 > - confirm its absense on  2.6.16-1.2069_FC4 or other
 > - check their FC-5 /proc/cpuinfo, and report back.
 > - explain why this is a good thing, or how it might have happened 
 > accidentally ?

SEP is incompatible with segment-based NX emulation provided
by exec-shield in the Fedora kernel.

The reason for this is that a SYSRET resets the segment limits.

		Dave

-- 
http://www.codemonkey.org.uk




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