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    SubjectRe: [PATCH] Re: SSE related security hole


    On Sat, 20 Apr 2002, Andrea Arcangeli wrote:
    >
    > Then the thing is different, I expected SSE3 not to mess the xmm layout.
    > If you just know SSE3 would break with the xorps the fxrestor way is
    > better. Anyways the problems I have about the implementation remains
    > (memset and duplicate efforts with ptrace in creating the empty fpu
    > state).

    Hey, send a clean patch and it will definitely get fixed.. I don't
    disagree with that part, although actual numbers are always good to have.

    > If they tell you the xmm registers won't change with SSE3 instead I
    > still prefer the xorps, that's 3bytes x 8 registers = 24 bytes of
    > icachce, compared to throwing away 512bytes/32 = 16 dcache cachelines so
    > it should be significantly faster.

    Oh, if they promise to not add registers we have an easy time, I agree.

    Linus

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