[SeaBIOS] vgabios testing

[Kevin O'Connor]

On Sun, Mar 04, 2012 at 08:08:12PM +0000, Julian Pidancet wrote:
> On Sun, Mar 4, 2012 at 7:54 PM, Kevin O'Connor <kevin at koconnor.net> wrote:
> >
> > The only thing I can think of would be to post-process the assembler
> > and replace "retl" instructions with "retw $2" instructions.  I'm not
> > sure if it would work and it would be real ugly.
> >
> 
> As I mentionned, ret is not the only instruction causing problems.
> I've identified issues with leave, enter, iret, and even some forms of
> the call instruction, and the list is probaly not complete yet. So it
> could be even more complicated that we think.

Okay.

> It looks like x86emu was never tested with gcc produced code before.
> And it looks like handling of the 0x66 instruction prefix has been
> neglected in a lot of different places in the code.

The coreboot project has an improved x86emu - it may have many of
these issues fixed.

-Kevin