Re: [SeaBIOS] Running privilege code on hidden O.S.

[Fred .]

Sounds like a rootkit.

On Thu, Jun 6, 2013 at 9:35 PM, Jerry Backer  wrote:
> Hi,
>
> The idea is to run some security and packet inspection codes on the hidden
> core.
> There is a typo on the title, it should be 'Running privilege code on
> hidden core'.
>
> Thanks,
>
> On Thu, Jun 6, 2013 at 3:04 PM, Fred .  wrote:
> > I am curious as to why you would want to do such a thing...
> >
> > On Thu, Jun 6, 2013 at 6:52 PM, Jerry Backer wrote:
> > > Hello,
> > >
> > > I am using seaBIOS with QEMU and am attempting to hide a processor core
> > > (on an smp system) from the O.S. and then load a dedicated code on that
> > > core before boot. I have managed to hide one of the cores by decreasing
> > > CountCPUs (within smp.c) after running the ap core code, hence the BIOS
> > > load info for 1 less core on the mp table.
> > >
> > > However, I have not been able to figure out how to load the privileged
> > > code. My intuition was to load it when the hidden core enters protected
> > > mode before running kernel code. But I don't see where in the code the
> > > cores go into protected mode during boot.
> > >
> > > Can anyone give me some insight on how to proceed?
> > >
> > > Thanks,
> > >
> > > SeaBIOS mailing list
> > > [e-mail]
> > > http://www.seabios.org/mailman/listinfo/seabios