Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754870AbZIANzX (ORCPT ); Tue, 1 Sep 2009 09:55:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754819AbZIANzW (ORCPT ); Tue, 1 Sep 2009 09:55:22 -0400 Received: from cam-admin0.cambridge.arm.com ([193.131.176.58]:37203 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754758AbZIANzW (ORCPT ); Tue, 1 Sep 2009 09:55:22 -0400 To: venki kaps Cc: Nicolas Pitre , "sagar.abhishek\@gmail.com" , "jkenisto\@us.ibm.com" , "rmk+kernel\@arm.linux.org.uk" , "linux-kernel\@vger.kernel.org" , "prasanna\@in.ibm.com" Subject: Re: ARM + jprobes/kretprobes SEGV/hangs/OOPS in 2.6.29 kernel References: <6d53329e0908250342g2cfb73f6v90f73c283c0d391c@mail.gmail.com> <6d53329e0908302227l63420351m1005d0c76346e2ec@mail.gmail.com> <6d53329e0908310311v55ef3909na0cbec756e63ccab@mail.gmail.com> <6d53329e0908312355y7bd2038ds6ba8efe671d98bc9@mail.gmail.com> From: Catalin Marinas Date: Tue, 01 Sep 2009 14:54:54 +0100 In-Reply-To: <6d53329e0908312355y7bd2038ds6ba8efe671d98bc9@mail.gmail.com> (venki kaps's message of "Tue\, 1 Sep 2009 12\:25\:37 +0530") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 01 Sep 2009 13:54:56.0981 (UTC) FILETIME=[CA292850:01CA2B0B] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 641 Lines: 16 venki kaps wrote: > I have found the exact problem with respect to ARM jprobes. > > The problem with configure i.e, CONFIG_ARM_UNWIND = y; is enabled. I haven't followed the kprobes implementation for ARM but does it make any assumptions about the existence of a frame pointer on the stack? Enabling stack unwinding automatically disables the framepointer. -- Catalin -- 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/