linux-kernel - Re: [PATCH] objtool: Disable stack validation when CROSS

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Message-ID: <20160303092134.7c750589@canb.auug.org.au>
Date:	Thu, 3 Mar 2016 09:21:34 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Josh Poimboeuf <jpoimboe@...hat.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH] objtool: Disable stack validation when CROSS_COMPILE is
 used

Hi Josh,

On Wed, 2 Mar 2016 15:17:26 -0600 Josh Poimboeuf <jpoimboe@...hat.com> wrote:
>
> On Wed, Mar 02, 2016 at 01:27:35PM +1100, Stephen Rothwell wrote:
> > 
> > On Tue, 1 Mar 2016 15:54:51 -0600 Josh Poimboeuf <jpoimboe@...hat.com> wrote:  
> > >
> > > Changing it to use the host compiler would probably be an easy fix, but
> > > that would expose a harder bug related to endianness.  
> > 
> > Just by luck, my PowerPC host is little endian :-)  
> 
> Aha!  In that case, I think I'll take a different approach and try to
> add support for CROSS_COMPILE.
> 
> We'll need it anyway, later on, when we port objtool to more
> architectures.

That would be great.  I was discussing this briefly with the powerpc
maintainer and he expressed some interest.

> Thanks.  I should have the patch(es) soon.  If/when they get merged,
> I'll let you know, and then you can drop this one.

OK, I will keep an eye out - I usually notice when stuff get fixed, but
a heads up is always helpful.

-- 
Cheers,
Stephen Rothwell