[Crash-utility] How to open 32 bit dom0 kdump....

[Dave Anderson]

----- "Feng LI" <funglee at gmail.com> wrote:

> Sorry about the confusion, I don't have any domU guest running...
> 
> My grub menu.lst is,
> kernel /boot/xen.gz watchdog=0 dom0_mem=1024M
> lowmem_emergency_pool=16M crashkernel=128M at 32M nmi=dom0
> module /boot/vmlinuz-2.6.27.42-0.1.1.xs5.6.0.44.111158xen ro
> ramdisk_size=250000 nmi_watchdog=0 xencons=off console=rcons0
> module /boot/initrd-5.6.0-31188p.img
> 
> xen.gz is 64 bit one, while dom0 kernel is 32bit...
> 
> I am using echo c > /proc/sysrq-trigger to generate the kernel dump.
> 
> When I tried to open the kernel dump,
> 
> 
> 
> [debugger at crash HV_crash]$ crash32 vmlinux-2.6.27
> vmcore-2010-09-02-22-30-38
> 
> crash32 5.0.3
> 
> ……………….
> 
> This program has absolutely no warranty. Enter "help warranty" for
> details.
> 
> WARNING: machine type mismatch:
> crash utility: X86
> vmcore-2010-09-02-22-30-38: X86_64
> 
> crash32: vmcore-2010-09-02-22-30-38: not a supported file format

Well, for starters, the crash utility must match the vmlinux file type,
i.e., you should be using the 32-bit version.

What is the output of: 

  # readelf -a vmcore-010-09-02-22-30-38

Dave
 
> 
> [debugger at crash HV_crash]$ crash64 vmlinux-2.6.27 vmcore-2010-09-02-22-30-38
> 
> crash64 5.0.3
> 
> ………………….
> 
> WARNING: machine type mismatch:
> crash utility: X86_64
> vmlinux-2.6.27: X86
> 
> crash64: vmlinux-2.6.27: not a supported file format
> 
>