[Crash-utility] how to analyze a 32bit dump with a 64bit crash

[Ming Zhang]

On Tue, 2007-03-27 at 10:17 -0500, Dave Anderson wrote:
> Ming Zhang wrote: 
> > Hi All 
> > 
> > My laptop has 64bit fc6 and crash utility. One of the development 
> > machine is 32bit RHEL4. whenever i try to open the dump generated
> > by 
> > that box, I got a unknown format error. i can analyze the dump with
> > the 
> > crash from that RHEL4, and also my laptop can analyze the dump from 
> > another 64bit RHEL4. 
> > 
> > so my question is how to allow the crash in a 64bit box to open a
> > dump 
> > from a 32bit box? 
> > 
> > Thanks! 
> > 
> > Ming 
> >   
> >  
> > 
> Try copying a 32-bit crash utility to the 64-bit laptop, 
> and running it from there. 


i thought about this. could u enlighten us why single crash cannot do
that? implementation limitation or more deeper reason?


> 
> Here's an example: 
> 
> # uname -m 
> x86_64 
> # file ./crash 
> ./crash: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for
> GNU/Linux 2.2.5, dynamically linked (uses shared libs), not stripped 
> # ./crash /tmp/vm* 
> 
> crash 4.0-3.21 
> Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007  Red Hat, Inc. 
> Copyright (C) 2004, 2005, 2006  IBM Corporation 
> Copyright (C) 1999-2006  Hewlett-Packard Co 
> Copyright (C) 2005, 2006  Fujitsu Limited 
> Copyright (C) 2006, 2007  VA Linux Systems Japan K.K. 
> 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. 
> Type "show copying" to see the conditions. 
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details. 
> This GDB was configured as "i686-pc-linux-gnu"... 
> 
>       KERNEL: /tmp/vmlinux 
> DEBUG KERNEL: /tmp/vmlinux-2.4.21-1.1931.2.421.ent.debug 
>     DUMPFILE: /tmp/vmcore 
>         CPUS: 1 
>         DATE: Tue Sep  9 18:02:05 2003 
>       UPTIME: 05:04:13 
> LOAD AVERAGE: 9.96, 10.56, 10.89 
>        TASKS: 72 
>     NODENAME: moe.lab.boston.redhat.com 
>      RELEASE: 2.4.21pre1 
>      VERSION: #3 Tue Sep 9 14:13:17 EDT 2003 
>      MACHINE: i686  (501 Mhz) 
>       MEMORY: 128 MB 
>        PANIC: "Oops: 0002" (check log for details) 
>          PID: 3701 
>      COMMAND: "sh" 
>         TASK: c791c000 
>          CPU: 0 
>        STATE: TASK_RUNNING (PANIC) 
> 
> crash> 
> 
> Dave
>