Re: SSE related security hole

Andi Kleen
2002-04-18T11:47:01Z

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