From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josh Poimboeuf Subject: Re: [PATCH] objtool: Disable stack validation when CROSS_COMPILE is used Date: Wed, 2 Mar 2016 15:17:26 -0600 Message-ID: <20160302211726.GA23501@treble.redhat.com> References: <20160301122910.74ff0a92@canb.auug.org.au> <20160301070750.GA6636@gmail.com> <20160301204001.5594bed3@canb.auug.org.au> <20160301215451.GC4852@treble.redhat.com> <20160302132735.37262b34@canb.auug.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Received: from mx1.redhat.com ([209.132.183.28]:54872 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750917AbcCBVR3 (ORCPT ); Wed, 2 Mar 2016 16:17:29 -0500 Content-Disposition: inline In-Reply-To: <20160302132735.37262b34@canb.auug.org.au> Sender: linux-next-owner@vger.kernel.org List-ID: To: Stephen Rothwell Cc: Ingo Molnar , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Peter Zijlstra , linux-next@vger.kernel.org, linux-kernel@vger.kernel.org On Wed, Mar 02, 2016 at 01:27:35PM +1100, Stephen Rothwell wrote: > Hi Josh, > > On Tue, 1 Mar 2016 15:54:51 -0600 Josh Poimboeuf 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. > > How about the below workaround patch to disable objtool and warn when > > CROSS_COMPILE is used? If anybody complains about lack of cross-compile > > support later, we could try to fix it then. > > This seems reasonable. > > > From a3c65947011a420743f308b698171c4209105d3f Mon Sep 17 00:00:00 2001 > > Message-Id: > > From: Josh Poimboeuf > > Date: Tue, 1 Mar 2016 13:35:51 -0600 > > Subject: [PATCH] objtool: Disable stack validation when CROSS_COMPILE is used > > I have applied this to the merge of the tip tree in linux-next today > and it compiles fine for me. I will continue applying it until > something better comes along or it is applied to the tip tree. 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. -- Josh