On Friday, 28 September 2007 02:12, H. Peter Anvin wrote:
> Jordan Crouse wrote:
> >
> > Worked, but that just raises more questions. Why didn't more x86 boxes
> > break or, alternatively, why did a new version of the BIOS fix the problem?
> > I guess we shouldn't look a gift horse in the mouth. Or something.
> >
>
> Why didn't more x86 boxes break... well, it's pretty natural an
> implementation of the BIOS to not clobber registers that aren't outputs.
> Arguably the BIOSes that do are still buggy, since there isn't a
> well-defined calling sequence for the BIOS and the convention that has
> evolved is "don't clobber anything unless it's an output."
>
> It's still wrong, however, especially since it means omitting the *real*
> SMAP check.
I'd like to update http://bugzilla.kernel.org/show_bug.cgi?id=9086 with correct
information.
Should I add a pointer to the patch from your previous message to it?
Greetings,
Rafael
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