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

Fred . eldmannen at gmail.com
Thu Jun 6 21:04:47 CEST 2013


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 <bataille16 at gmail.com> 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,
>
> --
> Jerry
>
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