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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham 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 DF4CBC4CEC9 for ; Wed, 18 Sep 2019 16:27:10 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 B3B34206C2 for ; Wed, 18 Sep 2019 16:27:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B3B34206C2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60660 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAcnN-0000wl-43 for qemu-devel@archiver.kernel.org; Wed, 18 Sep 2019 12:27:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50554) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iAbuZ-0001Fo-NY for qemu-devel@nongnu.org; Wed, 18 Sep 2019 11:30:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iAbuY-0008GW-I5 for qemu-devel@nongnu.org; Wed, 18 Sep 2019 11:30:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35054) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iAbuY-0008Fx-Cv; Wed, 18 Sep 2019 11:30:30 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A3AF710DCC9F; Wed, 18 Sep 2019 15:30:29 +0000 (UTC) Received: from t460s.redhat.com (ovpn-117-119.ams2.redhat.com [10.36.117.119]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3311D61F21; Wed, 18 Sep 2019 15:30:12 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Wed, 18 Sep 2019 17:29:05 +0200 Message-Id: <20190918152922.18949-13-david@redhat.com> In-Reply-To: <20190918152922.18949-1-david@redhat.com> References: <20190918152922.18949-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.64]); Wed, 18 Sep 2019 15:30:29 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL SUBSYSTEM s390x 12/29] s390x/tcg: MVCS/MVCP: Properly wrap the length X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , David Hildenbrand , Cornelia Huck , Richard Henderson , qemu-s390x@nongnu.org, Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" ... and don't perform any move in case the length is zero. Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/mem_helper.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 320e9ee65c..41d7336a1a 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -1980,10 +1980,13 @@ uint32_t HELPER(mvcs)(CPUS390XState *env, uint64_= t l, uint64_t a1, uint64_t a2) s390_program_interrupt(env, PGM_SPECIAL_OP, ILEN_AUTO, ra); } =20 + l =3D wrap_length32(env, l); if (l > 256) { /* max 256 */ l =3D 256; cc =3D 3; + } else if (!l) { + return cc; } =20 /* XXX replace w/ memcpy */ @@ -2009,10 +2012,13 @@ uint32_t HELPER(mvcp)(CPUS390XState *env, uint64_= t l, uint64_t a1, uint64_t a2) s390_program_interrupt(env, PGM_SPECIAL_OP, ILEN_AUTO, ra); } =20 + l =3D wrap_length32(env, l); if (l > 256) { /* max 256 */ l =3D 256; cc =3D 3; + } else if (!l) { + return cc; } =20 /* XXX replace w/ memcpy */ --=20 2.21.0