Re: Intel Pentium Bug: BSDI Releases a patch

Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 12 Nov 1997 12:39:41 +0000 (GMT)

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> BSDI seems to be able to handle the problem in software. No source
> provided as of today.

Dumping the idt and page tables on a running BSDI box with the patch answers
how its done however.

The IDT points to the end of a page such that vector 0x0E (page fault) is
the start of the next page. The page with vectors 0-0xD is missing. This
will cause all traps to cause a page fault. One assumes the page fault
handler then fixes them up and handles them

Alan

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