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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 1 Aug 2018 17:33:47 -0400 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w71LXkFC9568736 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 1 Aug 2018 21:33:46 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 50E32AC05F; Wed, 1 Aug 2018 17:34:24 -0400 (EDT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CEDB2AC05B; Wed, 1 Aug 2018 17:34:19 -0400 (EDT) Received: from kermit-br-ibm-com.ibmmodules.com (unknown [9.80.99.86]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 1 Aug 2018 17:34:19 -0400 (EDT) From: Murilo Opsfelder Araujo To: linux-kernel@vger.kernel.org Subject: [PATCH v4 0/6] powerpc: Modernize unhandled signals message Date: Wed, 1 Aug 2018 18:33:14 -0300 X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18080121-0040-0000-0000-00000456ECA5 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009468; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01068949; UDB=6.00549596; IPR=6.00847297; MB=3.00022446; MTD=3.00000008; XFM=3.00000015; UTC=2018-08-01 21:33:51 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18080121-0041-0000-0000-0000085D28D7 Message-Id: <20180801213320.11203-1-muriloo@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-08-01_08:, , 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=925 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1808010217 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 v3: https://lore.kernel.org/lkml/20180731145020.14009-1-muriloo@linux.ibm.com/ v3..v4: - Added new show_user_instructions() based on the existing show_instructions() - Updated commit messages - Replaced signals names table with a tiny function that returns a literal string for each signal number Cheers! Murilo Opsfelder Araujo (6): powerpc/traps: Print unhandled signals in a separate function powerpc/traps: Use an explicit ratelimit state for show_signal_msg() powerpc/traps: Use %lx format in show_signal_msg() powerpc/traps: Print VMA for unhandled signals powerpc: Add show_user_instructions() powerpc/traps: Show instructions on exceptions arch/powerpc/include/asm/stacktrace.h | 13 +++++++ arch/powerpc/kernel/process.c | 40 +++++++++++++++++++++ arch/powerpc/kernel/traps.c | 52 +++++++++++++++++++++------ 3 files changed, 95 insertions(+), 10 deletions(-) create mode 100644 arch/powerpc/include/asm/stacktrace.h