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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 31 Jul 2018 08:50:32 -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 w6VEoUjg22479128 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 31 Jul 2018 07:50:30 -0700 Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 79C27BE058; Tue, 31 Jul 2018 08:50:30 -0600 (MDT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 44892BE06F; Tue, 31 Jul 2018 08:50:27 -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 08:50:27 -0600 (MDT) From: Murilo Opsfelder Araujo To: linux-kernel@vger.kernel.org Subject: [PATCH v3 0/9] powerpc: Modernize unhandled signals message Date: Tue, 31 Jul 2018 11:50:11 -0300 X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18073114-0020-0000-0000-00000E461DFB X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009463; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01068483; UDB=6.00549299; IPR=6.00846683; MB=3.00022427; MTD=3.00000008; XFM=3.00000015; UTC=2018-07-31 14:50:36 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18073114-0021-0000-0000-000062792EA8 Message-Id: <20180731145020.14009-1-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=661 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" Hi, everyone. This series was inspired by the need to modernize and display more informative messages about unhandled signals. The "unhandled signal NN" is not very informative. We thought it would be helpful adding a human-readable message describing what the signal number means, printing the VMA address, and dumping the instructions. Before this series: pandafault32[4724]: unhandled signal 11 at 100005e4 nip 10000444 lr 0fe31ef4 code 2 pandafault64[4725]: unhandled signal 11 at 0000000010000718 nip 0000000010000574 lr 00007fff7faa7a6c code 2 After this series: pandafault32[4753]: segfault (11) at 100005e4 nip 10000444 lr fe31ef4 code 2 in pandafault32[10000000+10000] pandafault32[4753]: code: 4bffff3c 60000000 60420000 4bffff30 9421ffd0 93e1002c 7c3f0b78 3d201000 pandafault32[4753]: code: 392905e4 913f0008 813f0008 39400048 <99490000> 39200000 7d234b78 397f0030 pandafault64[4754]: segfault (11) at 10000718 nip 10000574 lr 7fffb0007a6c code 2 in pandafault64[10000000+10000] pandafault64[4754]: code: e8010010 7c0803a6 4bfffef4 4bfffef0 fbe1fff8 f821ffb1 7c3f0b78 3d22fffe pandafault64[4754]: code: 39298818 f93f0030 e93f0030 39400048 <99490000> 39200000 7d234b78 383f0050 Link to v2: https://lore.kernel.org/lkml/20180727145811.12334-1-muriloo@linux.ibm.com/ v2..v3: - Dropped patch 3 - Updated patch 4 to use %lx Cheers! Murilo Opsfelder Araujo (9): powerpc/traps: Print unhandled signals in a separate function powerpc/traps: Return early in show_signal_msg() powerpc/traps: Use %lx format in show_signal_msg() powerpc/traps: Print VMA for unhandled signals powerpc/traps: Print signal name for unhandled signals powerpc: Do not call __kernel_text_address() in show_instructions() powerpc: Add stacktrace.h header powerpc/traps: Show instructions on exceptions powerpc/traps: Add line prefix in show_instructions() arch/powerpc/include/asm/stacktrace.h | 13 +++++ arch/powerpc/kernel/process.c | 13 +++-- arch/powerpc/kernel/traps.c | 72 +++++++++++++++++++++++---- 3 files changed, 83 insertions(+), 15 deletions(-) create mode 100644 arch/powerpc/include/asm/stacktrace.h