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 13655C433DF for ; Sun, 31 May 2020 12:46:33 +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 D86402076B for ; Sun, 31 May 2020 12:46:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D86402076B 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]:43160 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jfNMG-0003ZP-13 for qemu-devel@archiver.kernel.org; Sun, 31 May 2020 08:46:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35318) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jfNLT-00038j-14 for qemu-devel@nongnu.org; Sun, 31 May 2020 08:45:43 -0400 Received: from indium.canonical.com ([91.189.90.7]:52980) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jfNLR-0004gh-Rm for qemu-devel@nongnu.org; Sun, 31 May 2020 08:45:42 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1jfNLP-0006WK-Bf for ; Sun, 31 May 2020 12:45:39 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 493262E810B for ; Sun, 31 May 2020 12:45:39 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Sun, 31 May 2020 12:37:54 -0000 From: Laurent Vivier <1881450@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=New; importance=Undecided; assignee=Laurent@vivier.eu; X-Launchpad-Bug-Tags: m68k X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: ahmedkrmn laurent-vivier X-Launchpad-Bug-Reporter: Ahmed Karaman (ahmedkrmn) X-Launchpad-Bug-Modifier: Laurent Vivier (laurent-vivier) References: <159088695339.29529.1797786788240960646.malonedeb@chaenomeles.canonical.com> Message-Id: <159092867488.14364.10315120320699214702.malone@soybean.canonical.com> Subject: [Bug 1881450] Re: Emulation of a math function fails for m68k Linux user mode 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="275d46a24253e557e4403d52832837e4bfa425b6"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: 6f1be08e579ec1679a91e3821eb7c375c7487392 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 = 2020/05/31 08:45:39 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, URIBL_BLOCKED=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 1881450 <1881450@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Tracing gives me: IN: expm1f 0x800005cc: fetoxm1x %fp2,%fp0 Disassembler disagrees with translator over instruction decoding Please report this to qemu-devel@nongnu.org (gdb) x/2hx 0x800005cc 0x800005cc: 0xf200 0x0808 The instruction is not implemented in qemu. I fix that. -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1881450 Title: Emulation of a math function fails for m68k Linux user mode Status in QEMU: New Bug description: Please check the attached math-example.c file. When running the m68k executable under QEMU, it results in an = "Illegal instruction" error. Other targets don't produce this error. Steps to reproduce the bug: 1. Download the math-example.c attached file. 2. Compile it by running: =C2=A0=C2=A0=C2=A0m68k-linux-gnu-gcc -O2 -static math-example.c -o math-e= xample-m68k -lm 3. Run the executable with QEMU: =C2=A0=C2=A0=C2=A0/build/qemu-5.0.0/build-gcc/m68k-linux-user/qemu-m68k m= ath-example-m68k The output of execution is: =C2=A0=C2=A0=C2=A0Profiling function expm1f(): =C2=A0=C2=A0=C2=A0qemu: uncaught target signal 4 (Illegal instruction) - = core dumped =C2=A0=C2=A0=C2=A0Illegal instruction (core dumped) Output when running on other targets: =C2=A0=C2=A0=C2=A0Profiling function expm1f(): =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Elapsed time: 47 ms =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Control result: 71804.953125 To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1881450/+subscriptions