On Mon, Jun 06, 2011 at 11:28:56AM +0300, Avi Kivity wrote:
> On 06/03/2011 10:37 PM, Pekka Enberg wrote:
> >This patch fixes access to 'ah' in int10_vesa() by masking the high bits.
> >
> >@@ -131,7 +131,7 @@ static void int10_vesa(struct int10_args *args)
> > {
> > u8 al;
> >
> >- al = args->eax;
> >+ al = args->eax& 0xff;
>
> Isn't this reading %al? And the high bits are masked by the type of
> the variable?
>
Type conversion will do the work but having explicit masking is
a way better I believe, at least it makes this code snippet notable.
Cyrill
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