Messages in this thread | | | Date | Thu, 18 Apr 2002 13:46:57 +0200 | From | Andi Kleen <> | Subject | Re: SSE related security hole |
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On Thu, Apr 18, 2002 at 12:53:12PM +0100, Alan Cox wrote: > > > Intel folks are actually saying even back in Pentium MMX days that it isnt > > > guaranteed that the FP/MMX state are not seperate registers > > > > In this case it would be possible to only do the explicit clear > > when the CPU does support sse1. For mmx only it shouldn't be needed. > > For sse2 also not. > > Do you have a documentation cite for that claim ?
Never mind. It was a bogus suggestion and fninit indeed also doesn't clear XMM on P4 and other SSE2 implementation.
-Andi
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