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=-18.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, 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 A719EC433DB for ; Wed, 24 Mar 2021 14:44:57 +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 0E8D861A0C for ; Wed, 24 Mar 2021 14:44:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0E8D861A0C 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]:57414 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lP4ki-0006UN-4j for qemu-devel@archiver.kernel.org; Wed, 24 Mar 2021 10:44:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52950) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lP4bo-0004MV-8i for qemu-devel@nongnu.org; Wed, 24 Mar 2021 10:35:45 -0400 Received: from indium.canonical.com ([91.189.90.7]:35626) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lP4bl-0001Zk-1P for qemu-devel@nongnu.org; Wed, 24 Mar 2021 10:35:42 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1lP4bj-0007on-58 for ; Wed, 24 Mar 2021 14:35:39 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 0FE072E8167 for ; Wed, 24 Mar 2021 14:35:39 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Wed, 24 Mar 2021 14:30:06 -0000 From: =?utf-8?q?Alex_Benn=C3=A9e?= <1915925@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=In Progress; 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: =?utf-8?q?Alex_Benn=C3=A9e_=28ajbennee=29?= References: <161356438332.24036.4652954745285513495.malonedeb@chaenomeles.canonical.com> Message-ID: <20210324143021.8560-8-alex.bennee@linaro.org> Subject: [Bug 1915925] [PULL 07/22] semihosting/arm-compat-semi: don't use SET_ARG to report 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="4446feb642ca86be4f6eceb855b408397dad6a50"; Instance="production" X-Launchpad-Hash: 18177b9c037891302aae8e9400edd048e3018a2d 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: <20210324143006.q1BX7yk__DWuQhlQAvkoAqg5ZYBnv9fP39jU-ZiVs9A@z> As per the spec: the PARAMETER REGISTER contains the address of a pointer to a four-field data block. So we need to follow arg0 and place the results of SYS_HEAPINFO there. Fixes: 3c37cfe0b1 ("semihosting: Change internal common-semi interfaces to = use CPUState *") Signed-off-by: Alex Benn=C3=A9e Reviewed-by: Peter Maydell Cc: Bug 1915925 <1915925@bugs.launchpad.net> Cc: Keith Packard Bug: https://bugs.launchpad.net/bugs/1915925 Message-Id: <20210323165308.15244-8-alex.bennee@linaro.org> diff --git a/semihosting/arm-compat-semi.c b/semihosting/arm-compat-semi.c index 0f0e129a7c..fe079ca93a 100644 --- a/semihosting/arm-compat-semi.c +++ b/semihosting/arm-compat-semi.c @@ -1214,7 +1214,11 @@ target_ulong do_common_semihosting(CPUState *cs) for (i =3D 0; i < ARRAY_SIZE(retvals); i++) { bool fail; = - fail =3D SET_ARG(i, retvals[i]); + if (is_64bit_semihosting(env)) { + fail =3D put_user_u64(retvals[i], arg0 + i * 8); + } else { + fail =3D put_user_u32(retvals[i], arg0 + i * 4); + } = if (fail) { /* Couldn't write back to argument block */ -- = 2.20.1 -- = 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: In Progress 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