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xen-devel
RE: [Xen-devel] A different probklem with save/restore on C/S 14823.
> -----Original Message-----
> From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
> Sent: 17 April 2007 17:17
> To: Petersson, Mats; Tim Deegan
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] A different probklem with
> save/restore on C/S 14823.
>
> On 17/4/07 16:49, "Petersson, Mats" <Mats.Petersson@xxxxxxx> wrote:
>
> > Got another one that looks like this:
> > (XEN) About to write to NULL
> > (XEN) Done
> > (XEN) Pagetable walk from 0000000000000000:
> > (XEN) L4[0x000] = 00000000472ea063 000000000000f6ea
> > (XEN) L3[0x000] = 00000000472e9063 000000000000f6e9
> > (XEN) L2[0x000] = 00000000472e8067 000000000000f6e8
> > (XEN) L1[0x000] = 00000000485ae067 0000000000000000
>
> Okay, I think this is expected behaviour from what I can
> understand of the
> monitor_table logic. I'll sort it out with Tim.
And when it comes to CR3 and monitor_table, I didn't have the right
thing in the output - I printed the ADDRESS of monitor_table, not the
actual PFN of the monitor table - changing that, and I can see that CR3
and monitor_table is the same thing (aside from one being a FN and the
other a real address). Sorry for that confusion.
So just to confirm, you think that this should be fixed (i.e. the
null-access should not be possible), but I should test the latest to see
if save/restore works better there, as there is no need to search
further for the actual cause of the "write to zero is possible" problem?
--
Mats
>
> Thanks,
> Keir
>
>
>
>
>
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- RE: [Xen-devel] A different probklem with save/restore on C/S 14823., (continued)
- RE: [Xen-devel] A different probklem with save/restore on C/S 14823., Petersson, Mats
- Re: [Xen-devel] A different probklem with save/restore on C/S 14823., Keir Fraser
- RE: [Xen-devel] A different probklem with save/restore on C/S 14823., Petersson, Mats
- Re: [Xen-devel] A different probklem with save/restore on C/S 14823., Keir Fraser
- RE: [Xen-devel] A different probklem with save/restore on C/S 14823., Petersson, Mats
- Re: [Xen-devel] A different probklem with save/restore on C/S 14823., Keir Fraser
- RE: [Xen-devel] A different probklem with save/restore on C/S 14823., Petersson, Mats
- Re: [Xen-devel] A different probklem with save/restore on C/S 14823., Keir Fraser
- RE: [Xen-devel] A different probklem with save/restore on C/S 14823., Petersson, Mats
- Re: [Xen-devel] A different probklem with save/restore on C/S 14823., Keir Fraser
- RE: [Xen-devel] A different probklem with save/restore on C/S 14823.,
Petersson, Mats <=
- Re: [Xen-devel] A different probklem with save/restore on C/S 14823., Keir Fraser
RE: [Xen-devel] A different probklem with save/restore on C/S 14823., Petersson, Mats
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