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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 A11B1C433E0 for ; Fri, 12 Jun 2020 14:37:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 69C1220835 for ; Fri, 12 Jun 2020 14:37:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ZTr9tY13" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726444AbgFLOhx (ORCPT ); Fri, 12 Jun 2020 10:37:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726262AbgFLOhv (ORCPT ); Fri, 12 Jun 2020 10:37:51 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 74B05C08C5C2 for ; Fri, 12 Jun 2020 07:37:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Subject:Cc:To:From:Date:Message-ID: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To:References; bh=o8Ne4mF5hiMjy68Cd2Jibbz9gAZEggeduQGzA7GEfPQ=; b=ZTr9tY13yVX06h2LuBD+OIgZ1C ibFGUSlNB7CHgN6jLIPNZGu8pJI0NkyiV1tGdeKq8wmRaBN3h1MPz5nTb7/tihtYzJ5bTksantabP 9AMLbPUkT8ciPKgY8DsXADnZmSuOrNu7osL6pLWEyQwoVkhNYVk7xkDnKdvcYFDALDRGWePMdfXBN UIPk32aLjzssW6o4Brzok0/qMr8d9T8n/pALyEk1ZR2SiIb9VISEb+j+TOsO/dloSErPx512R9JBX ZXhLSZ1kl4jsWd7s9RKWXvNXhnm24FRbCvJTwwCL56l8M+675seRz0oWPZ/JrvaCjTxSgMltz1UNz 39/J9Xjg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jjkoI-0006ub-62; Fri, 12 Jun 2020 14:37:34 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E3DD13011B2; Fri, 12 Jun 2020 16:37:31 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id BFE732389EB9E; Fri, 12 Jun 2020 16:37:31 +0200 (CEST) Message-ID: <20200612143034.933422660@infradead.org> User-Agent: quilt/0.66 Date: Fri, 12 Jun 2020 16:30:34 +0200 From: Peter Zijlstra To: Josh Poimboeuf Cc: linux-kernel@vger.kernel.org, x86@kernel.org, dvyukov@google.com, elver@google.com, andreyknvl@google.com, mark.rutland@arm.com, mhelsley@vmware.com, rostedt@goodmis.org, jthierry@redhat.com, mbenes@suse.cz, peterz@infradead.org Subject: [RFC][PATCH 0/3] objtool: KCOV vs noinstr Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.