linux-kernel - Re: [PATCH 0/3] ftrace: handle kernel code remove

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Date:	Fri, 15 Aug 2008 22:02:30 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Gregory Haskins <ghaskins@...ell.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"Luis Claudio R. Goncalves" <lclaudio@...g.org>,
	Clark Williams <williams@...hat.com>, srostedt@...hat.com
Subject: Re: [PATCH 0/3] ftrace: handle kernel code remove

On Fri, Aug 15, 2008 at 12:06:00PM +0200, Ingo Molnar wrote:
> 
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > >   http://redhat.com/~mingo/misc/config-Fri_Aug_15_11_34_53_CEST_2008.bad
> > 
> > the problem is that i'm building a 32-bit kernel on a 64-bit host, and 
> > the scripts/recordmcount.pl script does not create the temporary 
> > object files in the proper (32-bit) output ELF format.
> 
> the crude hack below got me going for now - but this needs a proper 
> solution.

recordmount.pl should use the already define environment variables:
$CC + $CFLAGS
$LD + $LDFLAGS
$OBJCOPY, $OBJCOPYFLAGS
$OBJDUMP

We need to set $OBJCOPYFLAFS to a sensible variable in arch/x86/Makefile
And we should introduce $OBJDUMPFLAGS too.

This would solve all the problems - no?

I am limited in time atm - so relying on one of you to create the patch
and do some testing.

	Sam
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