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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 587C6C433DF for ; Sat, 13 Jun 2020 19:54:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2F96320789 for ; Sat, 13 Jun 2020 19:54:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726626AbgFMTyQ (ORCPT ); Sat, 13 Jun 2020 15:54:16 -0400 Received: from ex13-edg-ou-002.vmware.com ([208.91.0.190]:8813 "EHLO EX13-EDG-OU-002.vmware.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726102AbgFMTyP (ORCPT ); Sat, 13 Jun 2020 15:54:15 -0400 Received: from sc9-mailhost3.vmware.com (10.113.161.73) by EX13-EDG-OU-002.vmware.com (10.113.208.156) with Microsoft SMTP Server id 15.0.1156.6; Sat, 13 Jun 2020 12:54:10 -0700 Received: from localhost (unknown [10.200.193.92]) by sc9-mailhost3.vmware.com (Postfix) with ESMTP id 6E658400BB; Sat, 13 Jun 2020 12:54:15 -0700 (PDT) Date: Sat, 13 Jun 2020 12:54:15 -0700 From: Matt Helsley To: Peter Zijlstra CC: Josh Poimboeuf , , , , , , , , , Subject: Re: [RFC][PATCH 0/3] objtool: KCOV vs noinstr Message-ID: <20200613195415.GC25598@rlwimi.vmware.com> Mail-Followup-To: Matt Helsley , Peter Zijlstra , Josh Poimboeuf , linux-kernel@vger.kernel.org, x86@kernel.org, dvyukov@google.com, elver@google.com, andreyknvl@google.com, mark.rutland@arm.com, rostedt@goodmis.org, jthierry@redhat.com, mbenes@suse.cz References: <20200612143034.933422660@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20200612143034.933422660@infradead.org> Received-SPF: None (EX13-EDG-OU-002.vmware.com: mhelsley@vmware.com does not designate permitted sender hosts) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 12, 2020 at 04:30:34PM +0200, Peter Zijlstra wrote: > Hi All, > > These patches go on top of objtool/core, although possibly we need them earlier. > > In order to solve the KCOV-vs-noinstr situation, we need objtool to rewrite > calls to __sanitizer_cov_*() into NOPs, similar to what recordmcount does. > > I'm hoping the pending objtool-recordmcount patches can also reuse some of this. This sounds great to me -- I'll have a look through your series and will try rebasing my work on this. Cheers, -Matt Helsley