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

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

Call Trace:
... 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.


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:

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