Linus Torvalds wrote:
>
> On Wed, 5 Jul 2000, Brian Gerst wrote:
>
> > How about just trapping the illegal opcode exception then? (patch
> > untested)
>
> Looks fine. Me likee, except for the fact that you should clear %0
> (otherwise you'll have random crap in the "cr4" variable after a trap - I
> realize that you zeroed the variable on a C source level, but gcc thinks
> that your asm-statement will overwrite it, so ...)
>
> Linus
Hmm, upon a closer look at the source, the illegal opcode trap isn't
quite setup to handle kernel faults properly. I assumed it did since I
got the idea from the 3DNow memcpy code, which uses the illegal opcode
trap for the "prefetch" instruction. I am working on an updated patch.
--Brian Gerst
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