[Crash-utility] Throw read error on vmcore produced by ARM soc.

[Li Haifeng]

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 at 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
--------------------------------------------------------------------------------------------
GDB works fine.

hfli at pc1935:~/work/crash-utility$ ./gdb-7.5/gdb/gdb vmlinux Vmcore
GNU gdb (GDB) 7.5
Copyright (C) 2012 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=x86 --target=arm-linux-gnueabi".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/hfli/work/crash-utility/vmlinux...done.

warning: exec file is newer than core file.
[New LWP 332]
#0  0xc0158de0 in sysrq_handle_crash (key=99) at drivers/tty/sysrq.c:134

warning: Source file is more recent than executable.
134             *killer = 1;
(gdb)


Any suggestion will be appreciate.

Thanks.