From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B13BC433E1 for ; Wed, 22 Jul 2020 18:00:03 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C37FA20717 for ; Wed, 22 Jul 2020 18:00:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pNm2AHzH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C37FA20717 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=8XN3kU/8J7tCiJun7ZbMu6CZnDseP4YnM3Gw9IvFZkk=; b=pNm2AHzH+UXHcDrOpZcxHkPCe /8aKTEbbb7m3aBH44nB12Mr/gWcHurszVhy4M/mF4VXalPnlTOQjNrR9N9rFZpqVXrHirWWHr8nMW Np3cnuopyncaOgjGDb/qY/nw0ytOxJt+2xWX2J4eo2IyOr4O670x1K++vmg561x3U3wj/moOgF5dj fmqLP8Z5KRWOsoo/PQ9y6IEkUExfsksbpf0946oq0ZdiGe04KZXClPRFGiwHV5aFMoYpVlN9cIj6o dAmb08IvM2/mcOCrU4Nush6todoTTTSQ7fe7KmzpOGVukmDr92xghjtGhvONCXmAD5p8onEM3+7eB sK+grjCDA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jyJ0t-0004z5-Hk; Wed, 22 Jul 2020 17:58:43 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jyJ0q-0004xp-NA for linux-arm-kernel@lists.infradead.org; Wed, 22 Jul 2020 17:58:41 +0000 Received: from oasis.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 59D79208E4; Wed, 22 Jul 2020 17:58:38 +0000 (UTC) Date: Wed, 22 Jul 2020 13:58:36 -0400 From: Steven Rostedt To: Sami Tolvanen Subject: Re: [RFC][PATCH] objtool,x86_64: Replace recordmcount with objtool Message-ID: <20200722135829.7ca6fbc5@oasis.local.home> In-Reply-To: References: <20200624203200.78870-1-samitolvanen@google.com> <20200624203200.78870-5-samitolvanen@google.com> <20200624212737.GV4817@hirez.programming.kicks-ass.net> <20200624214530.GA120457@google.com> <20200625074530.GW4817@hirez.programming.kicks-ass.net> <20200625161503.GB173089@google.com> <20200625200235.GQ4781@hirez.programming.kicks-ass.net> <20200625224042.GA169781@google.com> <20200626112931.GF4817@hirez.programming.kicks-ass.net> <20200717133645.7816c0b6@oasis.local.home> <20200717140545.6f008208@oasis.local.home> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200722_135840_867249_AFCCA8CB X-CRM114-Status: GOOD ( 14.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch , X86 ML , Kees Cook , "Paul E. McKenney" , Kernel Hardening , Peter Zijlstra , Greg Kroah-Hartman , Masahiro Yamada , linux-kbuild , Nick Desaulniers , LKML , clang-built-linux , Josh Poimboeuf , linux-pci@vger.kernel.org, Will Deacon , linux-arm-kernel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 20 Jul 2020 09:52:37 -0700 Sami Tolvanen wrote: > > Does x86 have a way to differentiate between the two that record mcount > > can check? > > I'm not sure if looking at the relocation alone is sufficient on x86, > we might also have to decode the instruction, which is what objtool > does. Did you have any thoughts on Peter's patch, or my initial > suggestion, which adds a __nomcount attribute to affected functions? There's a lot of code in this thread. Can you give me the message-id of Peter's patch in question. Thanks, -- Steve _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel