Hi, list.
I use crash-utility to analyse crash dump core from ARM soc. When I
execute command below, I get the error "crash: read error: kernel
virtual address: c0c1e040 type: "first vmap_area va_start"". I also
test it by gdb. It works fine. The Linux kernel's version is v3.0.8.
hfli@pc1935:~/work/crash-utility$ ./crash vmlinux Vmcore
crash 6.1.4
Copyright (C) 2002-2013 Red Hat, Inc.
Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation
Copyright (C) 1999-2006 Hewlett-Packard Co
Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited
Copyright (C) 2006, 2007 VA Linux Systems Japan K.K.
Copyright (C) 2005, 2011 NEC Corporation
Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. Enter "help copying" to see the conditions.
This program has absolutely no warranty. Enter "help warranty" for
details.
GNU gdb (GDB) 7.3.1
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<
http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu
--target=arm-elf-linux"...
crash: read error: kernel virtual address: c0c1e040 type: "first vmap_area
va_start"
Errors like the one above typically occur when the kernel and memory source
do not match. These are the files being used:
KERNEL: vmlinux
DUMPFILE: Vmcore
You've answered your own question -- you should always see errors if the vmlinux
kernel does not match the kernel crashed system.
If you cannot find/access the original vmlinux file that was being run
by the crashed kernel, then get the /boot/System.map file of the crashed
kernel, and enter it on the command line:
$ crash vmlinux Vmcore System.map
The crash utility will replace all of the invalid symbol values from the
"wrong" vmlinux file with their correct values from the System.map file.
Dave