From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-1.mimecast.com (us-smtp-1.mimecast.com [205.139.110.61]) by sourceware.org (Postfix) with ESMTP id 19B963851C1F for ; Wed, 3 Jun 2020 11:27:52 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 19B963851C1F Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-290-3bzpB6EfMICdrTmwkTQ1jg-1; Wed, 03 Jun 2020 07:27:49 -0400 X-MC-Unique: 3bzpB6EfMICdrTmwkTQ1jg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6C750100CCC3; Wed, 3 Jun 2020 11:27:48 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-112-181.ams2.redhat.com [10.36.112.181]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 62DF72DE74; Wed, 3 Jun 2020 11:27:47 +0000 (UTC) From: Florian Weimer To: Andrea Corallo Cc: libc-alpha@sourceware.org, nd@arm.com, Wilco.Dijkstra@arm.com Subject: Re: [PATCH] aarch64: MTE compatible strchrnul References: Date: Wed, 03 Jun 2020 13:27:45 +0200 In-Reply-To: (Andrea Corallo's message of "Wed, 03 Jun 2020 11:43:25 +0200") Message-ID: <87img8xuby.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jun 2020 11:27:53 -0000 * Andrea Corallo: > Introduce an Arm MTE compatible strchrnul implementation. > > Benchmarked on Cortex-A72, Cortex-A53, Neoverse N1 does not show > performance regressions. > > Co-authored-by: Wilco Dijkstra As a very high-level comment, I would expect some sort of markup in the file that this implementation is now MTE-safe, similar to what we have for executable stacks. Or do you plan to handle that in some other fashion? Thanks, Florian