Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762082AbZCYSi4 (ORCPT ); Wed, 25 Mar 2009 14:38:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754345AbZCYSiq (ORCPT ); Wed, 25 Mar 2009 14:38:46 -0400 Received: from tx2ehsobe004.messaging.microsoft.com ([65.55.88.14]:22195 "EHLO TX2EHSOBE008.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754335AbZCYSip convert rfc822-to-8bit (ORCPT ); Wed, 25 Mar 2009 14:38:45 -0400 X-BigFish: VPS-21(zz1432R98dR1805M936fK873fn7cf0izz1202hzzz2fh6bh63h) X-Spam-TCS-SCL: 2:0 X-FB-SS: 5, Message-ID: <49CA79FA.8080906@am.sony.com> Date: Wed, 25 Mar 2009 11:37:46 -0700 From: Tim Bird User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Russell King - ARM Linux CC: =?UTF-8?B?VXdlIEtsZWluZS1Lw7ZuaWc=?= , Frederic Weisbecker , Abhishek Sagar , linux-arm-kernel , linux kernel , Steven Rostedt , Ingo Molnar Subject: Re: Anyone working on ftrace function graph support on ARM? References: <49C936CA.8070800@am.sony.com> <20090324213618.GC5975@nowhere> <49C95EAF.7030901@gmail.com> <20090324224857.GE5975@nowhere> <20090325084248.GF4697@n2100.arm.linux.org.uk> <49CA5CFF.8090908@am.sony.com> <20090325170533.GA4667@pengutronix.de> <20090325171727.GH2952@n2100.arm.linux.org.uk> In-Reply-To: <20090325171727.GH2952@n2100.arm.linux.org.uk> Content-Type: text/plain; charset="UTF-8" X-OriginalArrivalTime: 25 Mar 2009 18:37:47.0544 (UTC) FILETIME=[CB4F9180:01C9AD78] X-SEL-encryption-scan: scanned Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1403 Lines: 32 Russell King - ARM Linux wrote: > On Wed, Mar 25, 2009 at 06:05:33PM +0100, Uwe Kleine-K�nig wrote: >> On Wed, Mar 25, 2009 at 09:34:07AM -0700, Tim Bird wrote: >>> Russell King - ARM Linux wrote: >>>> As pointed out in my previous mail, identifying where on the stack the >>>> return address is stored is only possible for OABI with frame pointers. >>>> >>>> EABI will probably be possible with the stack unwinding code, but it >>>> probably won't be cheap. The EABI unwinder is scheduled for merging >>>> during the present now-open merge window. >> EABI with frame pointers should work, too, shouldn't it? > > Yes, as I said at the top of my reply dated Wed, 25 Mar 2009 09:57:51 +0000 It turns out you can't use -pg and -fomit-frame-pointers at the same time. At least, my gcc complains about this: $ make arm-sony-linux-gnueabi-dev-gcc -g -pg -fomit-frame-pointer -o hello hello.c arm-sony-linux-gnueabi-dev-gcc: -pg and -fomit-frame-pointer are incompatible make: *** [hello] Error 1 ============================= Tim Bird Architecture Group Chair, CE Linux Forum Senior Staff Engineer, Sony Corporation of America ============================= -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/