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Re: [Xen-devel] [PATCH] xen 3.3 unstable: xend segfaults on amd64 when starting a hvm domain


  • To: Juergen Keil <jk@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Wed, 21 May 2008 16:50:19 +0100
  • Delivery-date: Wed, 21 May 2008 08:50:59 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Aci7Wl6unRZL+CdNEd2nzwAX8io7RQ==
  • Thread-topic: [Xen-devel] [PATCH] xen 3.3 unstable: xend segfaults on amd64 when starting a hvm domain

On 21/5/08 16:32, "Juergen Keil" <jk@xxxxxxxx> wrote:

> Anyway.  Problem with the current code is that it is broken for
> amd64 / x86_64.  When compiling cpuid() for 64-bit x86 code, we have
> to save and restore all 64-bits of the %rbx register; the current
> asm() statement saves/restores the lower 32-bits only, thashing the
> top 32-bits.
> 
> Due to this bug, xen-3.3 unstable xend is segfaulting in a 64-bit
> opensolaris dom0.

Thanks for the fix. That was my own stupid mistake!

 -- Keir



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