http://bugzilla.kernel.org/show_bug.cgi?id=10927
------- Comment #47 from [EMAIL PROTECTED] 2008-06-18 14:25 -------
[EMAIL PROTECTED] wrote:
> (In reply to comment #45)
>> What happens if you change "(%bx)" to "%ss:(%bx)"?
>
> Reboot.
Okay, it's definitely %ss being buggered, and the only thing that can
bugger up %ss but not %ds downstream of that code is a botched
transition out of protected mode. Rewriting all the real-mode code to
not use the stack is obviously not realistic (can't make any BIOS calls
that way), but it would be possible to dart into protected mode using
only %cs: references to set up a GDT, then setting all the segments to
sane, real-mode-like segments, and darting back out.
-hpa
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