[PATCH] Fix QEMU crash on amd64

[Juergen Lock]

On Wed, Jan 31, 2007 at 05:38:50PM -0500, Jung-uk Kim wrote:
> I have been experiencing QEMU crash on FreeBSD/amd64 host ever since 
> Fabrice had added SMP support.  Recently it was reported on QEMU 
> development mailing list:
> 
> http://lists.gnu.org/archive/html/qemu-devel/2007-01/msg00285.html
> 
> For more than a year, I have been running QEMU with SMP support 
> disabled because of this issue.  Today I finally found some time to 
> tackle this and got a fix.

Thank you, committed! :)

 I was just trying to find the cause to this (I actually installed
-current in qemu even tho I previously didn't have much luck running
qemu inside qemu, and indeed I was able to reproduce the problem.)
It's funny that the upper half of rbx apparently only gets spilled
on -current, even tho T0 (== AREG1 == rbx) certainly doesn't fit
into an int...

 Will you post on the qemu list or should I?

	Juergen