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Date: Thu, 4 Sep 2008 21:41:15 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: benh@kernel.crashing.org
Subject: Re: 2.6.27-rc5-mm1 mystery trace
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On Fri, 05 Sep 2008 14:36:41 +1000 Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:

> On Thu, 2008-09-04 at 20:49 -0700, Andrew Morton wrote:
> > On Fri, 05 Sep 2008 13:42:44 +1000 Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> > 
> > > 
> > > > This is stupid:
> > > > 
> > > > g5:/usr/src/25> gdb vmlinux
> > > > GNU gdb Red Hat Linux (6.3.0.0-1.21rh)
> > > > Copyright 2004 Free Software Foundation, Inc.
> > > > GDB is free software, covered by the GNU General Public License, and you are
> > > > welcome to change it and/or distribute copies of it under certain conditions.
> > > > Type "show copying" to see the conditions.
> > > > There is absolutely no warranty for GDB.  Type "show warranty" for details.
> > > > This GDB was configured as "ppc-yellowdog-linux-gnu"..."/usr/src/25/vmlinux": not in executable format: File format not recognized
> > > > 
> > > > probably there's some command line magic to make it work, but there
> > > > shouldn't be.
> > > 
> > > Is this a 64 bits gdb ?
> > > 
> > 
> > I don't think so - it's whatever ydl4.1 gave me.
> > 
> > A 64-bit binary on a 64-bit machine Should Just Work.  Maybe that's
> > me being simplistic.
> 
> But is it a 64 bits binary ? 
> 

vmlinux?  Yup.  According to file(1).