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To: Matti Aarnio <matti.aarnio@zmailer.org>
Subject: Re: Kernel bits
Message-ID: <974886395.3a1b95fb43c63@rumms.uni-mannheim.de>
Date: Wed, 22 Nov 2000 10:46:35 +0100 (MET)
From: 64738 <schwung@rumms.uni-mannheim.de>
Cc: linux-kernel@vger.kernel.org
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uname -m tells me the hardware type of the machine. Is this determined while 
booting or is this the architecture I choose during 'make config'? 

Can't I run a i386 kernel on a ia64 machine? I know something like this from HP-
UX. You can choose between a 32 and a 64 bit kernel when installing, so knowing 
that you have a 64 bit capable machine does not say that you have a 64 bit 
kernel.
And I want to have the kernel bits, not the processor bits.


Matti Aarnio <matti.aarnio@zmailer.org> wrote:

> On Wed, Nov 22, 2000 at 09:25:46AM +0100, 64738 wrote:
> > Is there a syscall or something that can tell me whether I'm working
> on a 32- 
> > or a 64-bit kernel?
> 
> 	uname(2)
> 
> 	It gives out various strings from which you must then deduce,
> 	what kind of kernel is needed to run at what kind of machine.
> 
> 	And even though the machine is running with 64-bit kernel
> 	(e.g. alpha/sparc64/mips64/ia64), your userspace code might
> 	be running in 32-bit mode.
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