From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (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 41cXCs0hY7zDqkJ for ; Sat, 28 Jul 2018 00:58:48 +1000 (AEST) Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w6REsQ1M017247 for ; Fri, 27 Jul 2018 10:58:46 -0400 Received: from e14.ny.us.ibm.com (e14.ny.us.ibm.com [129.33.205.204]) by mx0a-001b2d01.pphosted.com with ESMTP id 2kg4n8txcy-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 27 Jul 2018 10:58:46 -0400 Received: from localhost by e14.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 27 Jul 2018 10:58:45 -0400 From: Murilo Opsfelder Araujo To: linux-kernel@vger.kernel.org Cc: "Alastair D'Silva" , Andrew Donnellan , Balbir Singh , Benjamin Herrenschmidt , Christophe Leroy , Cyril Bur , "Eric W . Biederman" , Michael Ellerman , Michael Neuling , Murilo Opsfelder Araujo , Nicholas Piggin , Paul Mackerras , Simon Guo , Sukadev Bhattiprolu , "Tobin C . Harding" , linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 00/10] powerpc: Modernize unhandled signals message Date: Fri, 27 Jul 2018 11:58:01 -0300 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Message-Id: <20180727145811.12334-1-muriloo@linux.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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. We can add more informative messages, like informing what each code of a SIGSEGV signal means. We are open to suggestions. Before this series: pandafault[5815]: unhandled signal 11 at 00000000100007d0 nip 000000001000061c lr 00003fff87ff5100 code 2 After this series: pandafault[10850]: segfault (11) at 00000000100007d0 nip 000000001000061c lr 00007fff9f3e5100 code 2 in pandafault[10000000+10000] pandafault[10850]: code: 4bfffeec 4bfffee8 3c401002 38427f00 fbe1fff8 f821ffc1 7c3f0b78 3d22fffe pandafault[10850]: code: 392988d0 f93f0020 e93f0020 39400048 <99490000> 39200000 7d234b78 383f0040 Link to v1: https://lore.kernel.org/lkml/20180724192720.32417-1-muriloo@linux.ibm.com/ v1..v2: - Broke patch 7 down into patches 7-9 - Added proper copyright in arch/powerpc/include/asm/stacktrace.h - show_instructions(): prefixed lines with current->comm and current->pid Cheers! Murilo Opsfelder Araujo (10): powerpc/traps: Print unhandled signals in a separate function powerpc/traps: Return early in show_signal_msg() powerpc/reg: Add REG_FMT definition powerpc/traps: Use REG_FMT 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/reg.h | 6 +++ arch/powerpc/include/asm/stacktrace.h | 13 +++++ arch/powerpc/kernel/process.c | 35 ++++++------- arch/powerpc/kernel/traps.c | 73 +++++++++++++++++++++++---- 4 files changed, 100 insertions(+), 27 deletions(-) create mode 100644 arch/powerpc/include/asm/stacktrace.h -- 2.17.1