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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 A3566C433E0 for ; Mon, 8 Mar 2021 18:38:14 +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 0BC866516B for ; Mon, 8 Mar 2021 18:38:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0BC866516B 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]:44272 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lJKlh-0004hU-2q for qemu-devel@archiver.kernel.org; Mon, 08 Mar 2021 13:38:13 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:54556) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJJn9-0001eS-9E for qemu-devel@nongnu.org; Mon, 08 Mar 2021 12:35:40 -0500 Received: from indium.canonical.com ([91.189.90.7]:36398) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lJJn2-00084m-Sc for qemu-devel@nongnu.org; Mon, 08 Mar 2021 12:35:38 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1lJJn0-0008Ad-7h for ; Mon, 08 Mar 2021 17:35:30 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 393902E804C for ; Mon, 8 Mar 2021 17:35:30 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 08 Mar 2021 17:28:04 -0000 From: Keith Packard <1915925@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Confirmed; importance=Undecided; assignee=alex.bennee@linaro.org; X-Launchpad-Bug-Tags: semihosting testcase X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: ajbennee inver7 keithp pmaydell X-Launchpad-Bug-Reporter: iNvEr7 (inver7) X-Launchpad-Bug-Modifier: Keith Packard (keithp) References: <161356438332.24036.4652954745285513495.malonedeb@chaenomeles.canonical.com> Message-ID: <87czw9ftcr.fsf@keithp.com> Subject: [Bug 1915925] Re: [PATCH v1 3/3] semihosting/arg-compat: fix up handling of SYS_HEAPINFO 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="f41ce4c616a9df6b2066606b5a16a036a6d2f6bb"; Instance="production" X-Launchpad-Hash: a26af3593535dee33c5dd4028fa0a0998ae03f16 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com 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, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no 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 1915925 <1915925@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Message-ID: <20210308172804.HruVpmtAfCJMKg0A7gE22pg-ny1hvoZwGUUxgpTNn48@z> Alistair Francis writes: > I have started on the effort, but I have not finished yet. Adding > riscv_cpu_is_32bit() was the first step there and I have some more > patches locally but I don't have anything working yet. That's awesome. I think waiting until we see what APIs you're developing for detecting and operating in 32-bit mode on a 64-bit capable processor seems like a good idea for now. -- = -keith -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1915925 Title: ARM semihosting HEAPINFO results wrote to wrong address Status in QEMU: Confirmed Bug description: This affects latest development branch of QEMU. According to the ARM spec of the HEAPINFO semihosting call: https://developer.arm.com/documentation/100863/0300/Semihosting- operations/SYS-HEAPINFO--0x16-?lang=3Den > the PARAMETER REGISTER contains the address of a pointer to a four- field data block. However, QEMU treated the PARAMETER REGISTER as pointing to a four- field data block directly. Here is a simple program that can demonstrate this problem: https://github.com/iNvEr7/qemu-learn/tree/newlib-bug/semihosting- newlib This code links with newlib with semihosting mode, which will call the HEAPINFO SVC during crt0 routine. When running in QEMU (make run), it may crash the program either because of invalid write or memory curruption, depending on the compiled program structure. Also refer to my discussion with newlib folks: https://sourceware.org/pipermail/newlib/2021/018260.html To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1915925/+subscriptions