[SeaBIOS] seabios 0.6.1 regression
kevin at koconnor.net
Tue Nov 16 01:18:59 CET 2010
On Mon, Nov 15, 2010 at 06:09:45PM +0200, Avi Kivity wrote:
> On 11/15/2010 05:49 PM, Avi Kivity wrote:
> >On 11/15/2010 05:41 PM, Avi Kivity wrote:
> >>I think it's a miscompile.
> >> 1a4: 3e ds
> >> 1a5: 6c insb (%dx),%es:(%edi)
> >>Note no 66 prefix.
> >It isn't, that was random crap. All the insb() code is 32-bit.
> Rewriting it to use inb / stos works (jecxz ; insb; loop doesn't) so
> it looks like a kernel bug in insb emulation.
Ughh. I can revert that change on stable-0.6.1 if needed. It sounds
like we really do want this on the main branch though for the speed
benefit it provides.
More information about the SeaBIOS