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=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 052A4C433E0 for ; Tue, 16 Jun 2020 21:32:41 +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 C1B2420739 for ; Tue, 16 Jun 2020 21:32:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C1B2420739 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56044 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jlJCC-0008Rc-3Y for qemu-devel@archiver.kernel.org; Tue, 16 Jun 2020 17:32:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38172) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jlJAJ-00072n-RL for qemu-devel@nongnu.org; Tue, 16 Jun 2020 17:30:45 -0400 Received: from indium.canonical.com ([91.189.90.7]:35388) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jlJAH-0008Gg-Nk for qemu-devel@nongnu.org; Tue, 16 Jun 2020 17:30:43 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1jlJAF-0000jK-Tb for ; Tue, 16 Jun 2020 21:30:39 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id CB40A2E8107 for ; Tue, 16 Jun 2020 21:30:39 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Tue, 16 Jun 2020 21:22:18 -0000 From: =?utf-8?q?Alex_Benn=C3=A9e?= <1883784@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=New; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: ppc64le tcg testcase X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: nemequ X-Launchpad-Bug-Reporter: Evan Nemerson (nemequ) X-Launchpad-Bug-Modifier: =?utf-8?q?Alex_Benn=C3=A9e_=28ajbennee=29?= References: <159233926606.29237.7012634601262116409.malonedeb@chaenomeles.canonical.com> Message-Id: <159234253838.11026.1549327621198764389.launchpad@gac.canonical.com> Subject: [Bug 1883784] Re: [ppc64le] qemu behavior differs from ppc64le hardware X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="b190cebbf563f89e480a8b57f641753c8196bda0"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: 436ec358e057cfa2ff5cf6845c0086e0bb98b11a Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/16 16:35:28 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -58 X-Spam_score: -5.9 X-Spam_bar: ----- X-Spam_report: (-5.9 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1883784 <1883784@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" ** Tags added: tcg testcase -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1883784 Title: [ppc64le] qemu behavior differs from ppc64le hardware Status in QEMU: New Bug description: I have some code which passes my test suite on PPC64LE hardware when compiled with GCC 10, but the saem binary fails with both qemu-ppc64le 4.2 (on Fedora 32) and qemu-ppc64le-static 5.0.0 (Debian testing). I'm not getting any errors about illegal instructions or anything, like that; the results are just silently different on qemu. I've generated a reduced test case, which is attached along with the binaries (both are the same code, one is just statically linked). They should execute successufully on PPC64LE hardware, but on qemu they hit a __builtin_abort (because the computed value doesn't match the expected value). Without being familiar with PPC assembly I'm not sure what else I can do, but if there is anything please let me know. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1883784/+subscriptions