Re: [Xen-devel] Re: xen/stable 2.6.32.9 32bit dom0 kernel crashes early on boot

[M A Young <m.a.young@xxxxxxxxxxxx>]

On Thu, 18 Mar 2010, Jeremy Fitzhardinge wrote:

> > (gdb) x/i 0xc0405dbe
> > 0xc0405dbe<xen_set_pte+137>:   mov    %edx,(%ebx)
> >
> > (gdb) list *0xc0405dbe
> > 0xc0405dbe is in xen_set_pte (arch/x86/xen/mmu.c:703).
> > 698             ADD_STATS(pte_update_batched, paravirt_get_lazy_mode() == 
> > PARAVIRT_LAZY_MMU);
> > 699
> > 700     #ifdef CONFIG_X86_PAE
> > 701             ptep->pte_high = pte.pte_high;
> > 702             smp_wmb();
> > 703             ptep->pte_low = pte.pte_low;
> > 704     #else
> > 705             *ptep = pte;
> > 706     #endif
> > 707     }
> Xen is 32 bit, right?
>
> Could you disassemble this whole function, so I can see what register the 
> other half is in? (I'm guessing its ecx or esi; nothing else makes much 
> sense.)
I submitted an earlier report with a more complete dump of this function, 
which is at 
http://lists.xensource.com/archives/html/xen-devel/2010-02/msg00844.html
The code may have changed slightly since then but it looks to be the same 
issue.
        Michael Young

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