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Re: [Xen-devel] [PATCH v2] x86/emul: Correct the decoding of mov to/from cr/dr

To: "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>
From: "Jan Beulich" <JBeulich@xxxxxxxx>
Date: Tue, 07 Mar 2017 09:29:35 -0700
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxx>
Delivery-date: Tue, 07 Mar 2017 16:29:51 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

>>> On 07.03.17 at 17:23, <andrew.cooper3@xxxxxxxxxx> wrote:
> The mov to/from cr/dr behave as if they were encoded with Mod = 3.  When
> encoded with Mod != 3, no displacement or SIB bytes are fetched.
> 
> Add a test with a deliberately malformed ModRM byte.  (Also add the
> automatically-generated simd.h to .gitignore.)
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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References:
- [Xen-devel] [PATCH v2] x86/emul: Correct the decoding of mov to/from cr/dr
  - From: Andrew Cooper

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