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L tramadol hci tablets nux Crash HOWTONorman Pattennepatten@us.ibm.com2002-01-30Revision History tramadol hci tablets Revision 1.0 2002-01-30 Revised by: NM Initial release. tramadol hci tablets This document describes the installation and usage of the LKCD (L tramadol hci tablets nux KernelCrash Dump) package.-----------------------------------------------------------------------------Table of C tramadol hci tablets ntents1. Introduction 1.1. Copyright and License 2. How LKCD Works 2.1. What You Need 3. Installation tramadol hci tablets of lkcd 3.1. Installing From Source Code 3.2. Building and Installing LKCD Utilities 3.3. What Gets Installe tramadol hci tablets 3.4. Installing LKCD Utilities From RPM 3.5. Patching the Kernel 3.6. Build and Install the Kernel 4. tramadol hci tablets etup, Test, and Running crash 4.1. Setting up crash dump 4.2. Testing crash 4.3. Running crash -------- tramadol hci tablets --------------------------------------------------------------------1. IntroductionThe LKCD (Linux Kernel Crash Dump) tramadol hci tablets project is a set of kernel patches andutilities to allow a copy of the kernel memory to be saved in the event of aker tramadol hci tablets el panic. The saved kernel image makes forensics on the kernel panicpossible with utilities included in the package. tramadol hci tablets ost commercial Unixoperating systems come with similar crash utilities, but this package isfairly new to Linux and ha tramadol hci tablets to be added on manually. The LKCD utility is notdesigned to gather helpful information in the case of a hardware cau tramadol hci tablets ed panicor a segment violation. The complete LKCD package is available for downloadat [http://lkcd.sourceforge.net/] tramadol hci tablets ttp://lkcd.sourceforge.net/.-----------------------------------------------------------------------------1.1. Copyrig tramadol hci tablets t and LicenseThis document is copyrighted (c) 2002 by Norman Patten. Permission is grantedto copy, distribute and/or tramadol hci tablets odify this document under the terms of the GNUFree Documentation License, Version 1.1 or any later version published tramadol hci tablets y theFree Software Foundation; with no Invariant Sections, with no Front-CoverTexts, and with no Back-Cover Texts. A tramadol hci tablets opy of the license is available at[http://www.gnu.org/copyleft/fdl.html] http://www.gnu.org/copyleft/fdl.html.Linux i tramadol hci tablets a registered trademark of Linus Torvalds . lkcd is distributed underthe copyright of Silicon Graphics Inc.Send feedb tramadol hci tablets ck to nepatten@us.ibm.com.-----------------------------------------------------------------------------2. How LKCD Wo tramadol hci tablets ksWhen a kernel encounters certain errors it calls the "panic" function whichresults from a unrecoverable error. This tramadol hci tablets panic results in LKCD initiating akernel dump where kernel memory is copied out to the pre-designated dumparea. The d tramadol hci tablets mp device is configured as primary swap by default. The kernel isnot completely functional at this point, but there i tramadol hci tablets enough functionality tocopy memory to disk. After dump finishes copying memory to disk, the systemre-boots. When the tramadol hci tablets system boots back up, it checks for a new crash dump. If anew crash dump is found it is copied from the dump location tramadol hci tablets to the filesystem, "/var/log/dump" directory by default. After copying the image, thesystem continues to boot normall tramadol hci tablets and forensics can be performed at a laterdate.---------------------------------------------------------------------- tramadol hci tablets ------2.1. What You Needlkcd-kernelxxx.diff file for patching the kernel. The kernel versionsupported will change rou tramadol hci tablets inely. lkcdutils-xx.src.rpm - this is the utilitiessource and scripts you will need to setup and read a crash. At the tramadol hci tablets time ofthis writing there is a i386 binary rpm available from [http://lkcd.sourceforge.net/] lkcd.sourceforge.net, bu tramadol hci tablets you will still need thepatches for the startup scripts from the source rpm.----------------------------------------- tramadol hci tablets -----------------------------------3. Installation of lkcd3.1. Installing From Source CodeGet the lkcdutils-xxx.src.r tramadol hci tablets m and install it using rpm -ikcdutils-xxx.src.rpm . This will place a file called lkcdutils-xxx.tar.gz inthe /usr/src tramadol hci tablets redhat/SOURCES directory. This file is a compressed tar image ofthe lkcd source tree. Unwind the source in a director tramadol hci tablets of your choice like "/usr/src" with tar -zxvf kcdutils-xxx.src.rpm . This will create a directorycalled "kcdutils-xx tramadol hci tablets " which will contain the LKCD utilities source.---------------------------------------------------------------------- tramadol hci tablets ------3.2. Building and Installing LKCD UtilitiesLKCD used the standard GCC compiler and make files. To build the sui tramadol hci tablets e, cd tothe LKCD src directory and run ./configure to build configuration files. Thenext step is to run make to build tramadol hci tablets the utilities, and finally run make installto install the utilities and man pages.----------------------------------- tramadol hci tablets -----------------------------------------3.3. What Gets Installed+--------------------------------------------------- tramadol hci tablets ---------------------------+| /etc/sysconfig/dump # Configuration file for dump || /sbin tramadol hci tablets lcrash # The crash utility || /sbin/lkcd # Script t tramadol hci tablets configure and save a crash || /sbin/lkcd_config # Configuration utility for dump || tramadol hci tablets /sbin/lkcd_ksyms # Utility for reconstructing kernel symbols || /usr/include/sial_api.h # H tramadol hci tablets ader file for the SIAL API || /usr/lib/libsial.a # Simple Image Access Language library tramadol hci tablets || /usr/man/man1/lcrash.1 # man page for lcrash || /usr/man/man1/lkcd_config.1 tramadol hci tablets # man page for lkcd_config || /usr/man/man1/lkcd_ksyms.1 # man page for lkcd_ksyms tramadol hci tablets || /usr/share/sial/lcrash/ps.sial # ps command implementation of SIAL || tramadol hci tablets |+-------------------------------------------------------------------------------+-----------------------------------------------------------------------------3.4. Installing LKCD Utilities From RPMYou can install the pre-built utilities from rpm by running rpm -ikcdutils-xxx.rpm . You will still need to patch the kernel and install thestartup script patches. However you can bypass building the utilities step.-----------------------------------------------------------------------------3.5. Patching the KernelThe next step is patching and rebuilding the kernel. You will need to patchthe kernel source with the lkcd-xxx.diff file you downloaded from [http://lkcd.sourceforge.net/] http://lkcd.sourceforge.net/. Copy the patch into thesame directory as your kernel and run patch -p0 < lkcd-kernelxxx.diff . Makesure the patch you use is the same version as the kernel you are patching.Next you will need to configure the kernel to enable crash dump support. Bydefault crash support is turned off after applying the patch. If you use makemenuconfig or make xconfig, the "LKCD support" option is under kernelhacking. You will also n
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