Messages in this thread | | | Date | Fri, 19 Apr 2002 20:11:03 -0400 | From | Brian Gerst <> | Subject | Re: [PATCH] Re: SSE related security hole |
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Linus Torvalds wrote: > > On Fri, 19 Apr 2002, H. Peter Anvin wrote: > >>Indeed. Logically, FNINIT should have been extended to initialize it all - >>- it is a security hole that it doesn't initialize MMX properly. > > > Well, MMX should arguably be initialized with "emms", so the proper > sequence migth be something like > > if (sse) > asm("emms"); > asm("fninit"); > > What does emms do to SSE2? > > Linus >
All emms does is reset the tag word. It doesn't touch the registers.
--
Brian Gerst
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