From patchwork Tue Jul 31 14:50:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Murilo_Opsfelder_Ara=C3=BAjo?= X-Patchwork-Id: 951666 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41g0JD3gBnz9ryn for ; Wed, 1 Aug 2018 01:11:08 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 41g0JD2QjBzF1Hv for ; Wed, 1 Aug 2018 01:11:08 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=muriloo@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 41fzsK1qWMzF15Z for ; Wed, 1 Aug 2018 00:51:17 +1000 (AEST) Received: from pps.filterd (m0098393.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w6VE8v6m121555 for ; Tue, 31 Jul 2018 10:51:15 -0400 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0a-001b2d01.pphosted.com with ESMTP id 2kjqybdvd8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 31 Jul 2018 10:51:15 -0400 Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 31 Jul 2018 08:51:09 -0600 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w6VEp7fb22544688 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 31 Jul 2018 07:51:07 -0700 Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B8374BE051; Tue, 31 Jul 2018 08:51:07 -0600 (MDT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5531EBE056; Tue, 31 Jul 2018 08:51:04 -0600 (MDT) Received: from kermit-br-ibm-com.br.ibm.com (unknown [9.18.235.193]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 31 Jul 2018 08:51:04 -0600 (MDT) From: Murilo Opsfelder Araujo To: linux-kernel@vger.kernel.org Subject: [PATCH v3 8/9] powerpc/traps: Show instructions on exceptions Date: Tue, 31 Jul 2018 11:50:19 -0300 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180731145020.14009-1-muriloo@linux.ibm.com> References: <20180731145020.14009-1-muriloo@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18073114-0016-0000-0000-000009104437 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009463; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01068484; UDB=6.00549299; IPR=6.00846683; MB=3.00022427; MTD=3.00000008; XFM=3.00000015; UTC=2018-07-31 14:51:13 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18073114-0017-0000-0000-00003FD389A9 Message-Id: <20180731145020.14009-9-muriloo@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-07-31_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=662 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807310137 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michael Neuling , Murilo Opsfelder Araujo , Simon Guo , Nicholas Piggin , Paul Mackerras , "Eric W . Biederman" , Andrew Donnellan , Alastair D'Silva , Joe Perches , Sukadev Bhattiprolu , linuxppc-dev@lists.ozlabs.org, Cyril Bur , "Tobin C . Harding" Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Call show_instructions() in arch/powerpc/kernel/traps.c to dump instructions at faulty location, useful to debugging. Before this patch, an unhandled signal message looked like: pandafault[10524]: segfault (11) at 100007d0 nip 1000061c lr 7fffbd295100 code 2 in pandafault[10000000+10000] After this patch, it looks like: pandafault[10524]: segfault (11) at 100007d0 nip 1000061c lr 7fffbd295100 code 2 in pandafault[10000000+10000] Instruction dump: 4bfffeec 4bfffee8 3c401002 38427f00 fbe1fff8 f821ffc1 7c3f0b78 3d22fffe 392988d0 f93f0020 e93f0020 39400048 <99490000> 39200000 7d234b78 383f0040 Signed-off-by: Murilo Opsfelder Araujo --- arch/powerpc/kernel/traps.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index e71f12bca146..b27f3f71d745 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -70,6 +70,7 @@ #include #include #include +#include #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC_CORE) int (*__debugger)(struct pt_regs *regs) __read_mostly; @@ -356,6 +357,8 @@ static void show_signal_msg(int signr, struct pt_regs *regs, int code, print_vma_addr(KERN_CONT " in ", regs->nip); pr_cont("\n"); + + show_instructions(regs); } void _exception_pkey(int signr, struct pt_regs *regs, int code,