[Xen-devel] crash with Xen dom0 image from kdump

[Kazuo Moriwaka <moriwaka@xxxxxxxxxxxxx>]

Hi,

I tried to use crash (http://people.redhat.com/~anderson/) with 
x86_32 xen domain0 image, which is extracted from whole-machine dump
image made by kexec/kdump.

'kmem -i' cause some error, but other almost all commands I tried seem
to work well.
This may be some helps for xen development and troubleshooting.

regards,

---------------------------------------------------------------------------
(... get vmcore with kexec/kdump ...)
$ ./dom0cut_x86_32.py -txen -f -dvmcore -odom0core -xxen-syms -vvmlinux-2.6.16
$ crash vmlinux dom0core

crash 4.0-2.24
Copyright (C) 2002, 2003, 2004, 2005, 2006  Red Hat, Inc.
Copyright (C) 2004, 2005, 2006  IBM Corporation
Copyright (C) 1999-2006  Hewlett-Packard Co
Copyright (C) 2005  Fujitsu Limited
Copyright (C) 2005  NEC Corporation
Copyright (C) 1999, 2002  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 6.1
Copyright 2004 Free Software Foundation, Inc.
GDB 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.
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There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...


      KERNEL: vmlinux                           
    DUMPFILE: dom0core
        CPUS: 2
        DATE: Wed May 24 18:52:04 2006
      UPTIME: 00:04:32
LOAD AVERAGE: 0.46, 0.10, 0.03
       TASKS: 26
    NODENAME: (none)
     RELEASE: 2.6.16.13-xen
     VERSION: #3 SMP Wed May 24 10:08:29 JST 2006
     MACHINE: i686  (866 Mhz)
      MEMORY: 887.4 MB
       PANIC: "SysRq : Trigger a crashdump"
         PID: 163
     COMMAND: "echo"
        TASK: c024e050  [THREAD_INFO: f3f0e000]
         CPU: 0
       STATE: TASK_RUNNING (SYSRQ)

crash> bt
PID: 163    TASK: c024e050  CPU: 0   COMMAND: "echo"
 #0 [f3f0ffbc] ret_from_fork at c01050a8
 #1 [f3f0ffb8] system_call at c01051d2
    EAX: 00000004  EBX: 00000001  ECX: b7e8c000  EDX: 00000002 
    DS:  007b      ESI: 00000002  ES:  007b      EDI: 00000000 
    SS:  007b      ESP: bf8ad750  EBP: bf8ad774 
    CS:  0073      EIP: b7f35a88  ERR: 00000004  EFLAGS: 00000246 
crash> kmem -i
              PAGES        TOTAL      PERCENTAGE
 TOTAL MEM   225145     879.5 MB         ----
      FREE   216192     844.5 MB   96% of TOTAL MEM
      USED     8953        35 MB    3% of TOTAL MEM
    SHARED   216640     846.2 MB   96% of TOTAL MEM
kmem: invalid kernel virtual address: 0  type: "inode buffer"
---------------------------------------------------------------------------
-- 
Kazuo Moriwaka <moriwaka@xxxxxxxxxxxxx>

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