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Re: [Xen-devel] [RFC][PATCH] Emulate instructions in vm86 mode

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] [RFC][PATCH] Emulate instructions in vm86 mode
From: Bastian Blank <bastian@xxxxxxxxxxxx>
Date: Thu, 7 Sep 2006 15:09:08 +0200
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On Thu, Sep 07, 2006 at 01:42:02PM +0100, Keir Fraser wrote:
> > I'm not sure if this is the correct fix or if we should call the gpf
> > handler of the running system. At least the support in linux reports
> > traps back to the userspace caller which is not possible if emulated in
> > xen.
> There are also data operands of some instructions that may need fixing
> (INS/OUTS). What happens if you just bail to the guest's GPF handler if in
> vm86 mode?

I don't know how to do that.

There is some code to pass it to the guest in do_general_protection, but
I don't know why it fails than.


You're dead, Jim.
                -- McCoy, "Amok Time", stardate 3372.7

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