On 11/17/2015 02:37 PM, Boris Ostrovsky wrote:
On 11/17/2015 02:16 PM, Andy Lutomirski wrote:
Looks good to me. Does Xen have any sysexit/sysret32 equivalent to
return to 32-bit user mode? If so, it could be worth trying to wire
it up by patching the jz instead of the test instruction.
We ca
On Tue, Nov 17, 2015 at 11:29 AM, Andrew Cooper
wrote:
> On 17/11/15 19:16, Andy Lutomirski wrote:
>> On Tue, Nov 17, 2015 at 11:12 AM, Andrew Cooper
>> wrote:
>>> On 17/11/15 18:49, Andy Lutomirski wrote:
On Nov 17, 2015 6:40 AM, "Boris Ostrovsky"
wrote:
> On 11/16/2015 04:55 PM,
On 11/17/2015 02:16 PM, Andy Lutomirski wrote:
Looks good to me. Does Xen have any sysexit/sysret32 equivalent to
return to 32-bit user mode? If so, it could be worth trying to wire
it up by patching the jz instead of the test instruction.
We can actually make patching a little bit more effic
On 17/11/15 19:16, Andy Lutomirski wrote:
> On Tue, Nov 17, 2015 at 11:12 AM, Andrew Cooper
> wrote:
>> On 17/11/15 18:49, Andy Lutomirski wrote:
>>> On Nov 17, 2015 6:40 AM, "Boris Ostrovsky"
>>> wrote:
On 11/16/2015 04:55 PM, H. Peter Anvin wrote:
> On 11/16/15 12:22, Borislav Petkov
On Tue, Nov 17, 2015 at 11:16:11AM -0800, Andy Lutomirski wrote:
> Works for me, too, although seeing "xen_pv_host" in the Linux cpu
> features would be very strange indeed :)
That feature would be, of course, *not* in /proc/cpuinfo.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails wh
On Tue, Nov 17, 2015 at 11:12 AM, Andrew Cooper
wrote:
> On 17/11/15 18:49, Andy Lutomirski wrote:
>> On Nov 17, 2015 6:40 AM, "Boris Ostrovsky"
>> wrote:
>>> On 11/16/2015 04:55 PM, H. Peter Anvin wrote:
On 11/16/15 12:22, Borislav Petkov wrote:
> Huh, so what's wrong with a jump:
On 17/11/15 18:49, Andy Lutomirski wrote:
> On Nov 17, 2015 6:40 AM, "Boris Ostrovsky" wrote:
>> On 11/16/2015 04:55 PM, H. Peter Anvin wrote:
>>> On 11/16/15 12:22, Borislav Petkov wrote:
Huh, so what's wrong with a jump:
jmp 1f
swapgs
1:
>>>
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