Re: Pentium bug fix

Robert Bihlmeyer (
18 Dec 1997 10:59:47 +0100


>>>>> On Thu, 18 Dec 1997 13:11:35 +0000 ( )
>>>>> Gerard Paul Java <> said:

Gerard> I'm already running 2.0.32 which fixes the f00f bug. However,
Gerard> I'm very curious as to exactly how the invalid opcode was
Gerard> trapped. I have the source code, but can we just have some
Gerard> description on how the fix works? I'd really like to know.

It is arranged, that illegal instructions generate a page fault, which
even works for the f00f-thingy (it's an illegal instruction). The page
fault handler contains code to handle this special case.


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