linux-kernel - Re: how to tell i386 from x86-64 kernel

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Date:	Sat, 2 Feb 2008 12:06:52 +0100
From:	Pavel Machek <pavel@....cz>
To:	Rik Bobbaers <Rik.Bobbaers@...s.kuleuven.be>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: how to tell i386 from x86-64 kernel

On Fri 2008-02-01 11:47:29, Rik Bobbaers wrote:
> hi there,
> 
> since i'm not on the list... how about:
> 
> tail /proc/1/smaps and check the address size...
> on 32 bit: ffffe000-fffff000 r-xp 00000000 00:00 0          [vdso]
> 
> on 64 bit: ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
> [vdso]
> 
> there you can clearly see that your address space is double... so
> there's your 32 bit vs 64 bit
> 
> as a normal user, you can do the same but with your own processes

That tells you if _init_ is 32 or 64 bit, not kernel.

I'm running 32-bit distro on 64-bit kernel here. It works fine (as it
should).

									Pavel

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