Re: [Xen-devel] [HVM] Debug register access question

["Travis Betak" <travis.betak@xxxxxxx>]

On Fri, 18 Aug 2006, George Dunlap  wrote:

> Good catch.  Do you have a simple test to verify that the new patch
> works properly?
> -George
Hi, George,

No, I don't exactly have a simple test that can verify it.  I haven't been 
doing very thorough testing on the SVM side of things, I've just playing 
with gdb in a guest and setting breakpoints in a simple app with 'hbreak' 
and it seems to be catching them properly.  If you'd like, I can try and 
test things out with and without my patch using my very simple smoke test 
to see if there's a noticible difference.
  --travis

BTW, sorry for the late reply.  My filter misplaced your message.

> On 8/17/06, Travis Betak <travis.betak@xxxxxxx> wrote:
> > My question is this.  On the debug register access, why is the EIP
> > updated?  I don't understand some of the finer details of VT but by
> > updating the EIP, doesn't this initial debug register access get lost?
> > I've included the two snippets of code in question below and a patch to
> > remove EIP update if it is wrong.


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