RE: [Xen-users] svm.c:83:d917 Bad instruction length 0

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> 
> In 3.2.2-rc2-pre, an instruction length of 0 doesn't cause a guest
crash,
> but rather a retry of the instruction. This was introduced in cs
16898.
> That said,  in 3.2 and older svm.c has a bunch of special case
emulation
> code for system instructions, some of which is quite
incomplete/incorrect.
> 3.3 will be much improved in this regard. In any case, a dump of the
> instruction bytes surrounding the eip would be necessary to determine
what
> the cause was in this particular case.
> 

How easy is it to get that information?

The annoying thing in this case is that it worked under 3.1.[12].

Thanks

James

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