Hello Jeff,

I was able to compile and run 64bit UML on 64bit PC. My end objective is
to run 32bit application on 64bit UML kernel. But i'm unable run 32bit
application on 64bit kernel. 

To run 32bit application in 64bit "CONFIG_IA32_EMULATION=y" needs to be
set in kernel configuration file. But I don't see such flag for 64bit
UML Kernel configuration file (generated with "make defconfig ARCH=um"
on 64bit machine).

My question is does 64bit UML provide 32bit emulation? If yes how to
configure it?

Thanks,
Vishal Soni.
 

> -----Original Message-----
> From: Vishal Soni-G20083 
> Sent: Thursday, July 19, 2007 3:57 PM
> To: 'Jeff Dike'
> Cc: 'user-mode-linux-user@lists.sourceforge.net'
> Subject: RE: [uml-user] Does UML support 64bit environment?
> 
> Hello Jeff
> 
> Thanks a lot for prompt reply.
> 
> I resolved the problem of Kernel-panic. Problem was I'm using 
> busybox utility (which also includes init) in UML kernel and 
> by mistake I compiled busybox as 64bit executable. I was 
> using 32bit UML kernel, which can't run 64bit busybox.
> 
> Regards,
> Vishal Soni.
>  
> 
> > -----Original Message-----
> > From: Jeff Dike [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, July 18, 2007 7:10 PM
> > To: Vishal Soni-G20083
> > Cc: user-mode-linux-user@lists.sourceforge.net
> > Subject: Re: [uml-user] Does UML support 64bit environment?
> > 
> > On Wed, Jul 18, 2007 at 08:39:23PM +0800, Vishal Soni-G20083 wrote:
> > > Can we compile and run UML kernel on a 64bit Machine? 
> > 
> > Yes.
> > 
> > > If no, Is
> > > mandatory to give SUBARCH=i386(or some other
> > subarchitecture) when we
> > > compile UML on 64bit Machine?
> > 
> > If you want a 32-bit UML, that works for some people.  I have just 
> > gotten bizarre compilation errors when I tried it.
> > 
> > > I'm getting following Kernel panic on execution of UML 
> (built with 
> > > SUBARCH=i386). Can anyone point where I went wrong?
> > 
> > What was the boot output?
> > 
> >                             Jeff
> > --
> > Work email - jdike at linux dot intel dot com
> > 
> 

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