Re: [Xen-devel] [PATCH] x86_emulate: properly do IP updates and other side effects on success

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 11/08/2014 16:14, Jan Beulich ha scritto:
> > > > On 11.08.14 at 15:16, <fabio.fantoni@xxxxxxx> wrote:
> > Now I did also a vcpus dump on domU preserved after crash if can be
> > useful for this problem probably about cpu's instructions emulation:
> That's certainly a necessary step, but without telling us the instruction
> under emulation (assuming there is one being emulated) by resolving
> the dumped RIP values and ...
>
> > gdbsx -c 1 64
> > ===> Context for DOMID:1
> >
> > --> VCPU:0
> > rip:ffffffff810013a8 rsp:ffff880074803b30 flags:0000000000000092
> > rax:0000000000000000 rbx:00000000fffffffe rcx:00000000ffffffff
> > rdx:ffffffff81edc300 rsi:ffff880074803b3c rdi:0000000000000002
> > r08:0000000000000000 r09:0000000000000002 r10:ffffffff81d0a5e0
> > r11:ffff8800748038c6 r12:ffffffff81c515c0 r13:0000000000000000
> > r14:ffffffff81edc300 r15:0000000000000000 rbp:ffff880074803b40
> > cs:0000000000000010 ds:0000000000000000 fs:0000000000000000
> > gs:0000000000000000
> >
> > Call Trace:
> >      [ffffffff810013a8]
> >      [ffffffff8100357e]
> >      [ffffffff810035a3]
> >      [ffffffff816fa43c]
> >      [ffffffff81a07727]
> >      [ffffffff816fa49a]
> >      [ffffffff816eb027]
> >      [ffffffff810e17c8]
> >      [ffffffff816f7603]
> >      [ffffffff81a073db]
> >      [ffffffff81016f9b]
> ... perhaps resolving these addresses so we can associated a
> meaning to them I don't think there's much we can do with this data.
>
> Jan
Thanks for your reply.
Can you give me an how-to for take all data you need?
I tried also gdbsx to try catch one full backtrace of domU's crash but 
seems that was failed:
http://lists.xen.org/archives/html/xen-devel/2014-08/msg00801.html

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