8:48 a.m.
----- Original Message -----
Am Montag 16 November 2015, 14:01:35 schrieb Nan Xiao:
> Hi Dave,
>
> >> (2) "machine type mismatch"
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.5.1_10-1.gz_E5lLat: X86
> >>
> >> But according to "uname -a":
> >>
> >> # uname -a
> >> Linux linux-6ev3 3.12.49-6-xen #1 SMP Mon Oct 26 16:05:37 UTC 2015
> >> (11560c3) x86_64 x86_64 x86_64 GNU/Linux
> >>
> >> The running SuSE is also a 64-bit OS, so whether can remove these
> >> warnings?
>
> > The mismatch message says that "/var/tmp/xen-4.5.1_10-1.gz_E5lLat" is
an X86
> > 32-bit binary. You cannot use a 32-bit xen binary with a 64-bit crash utility
> > binary.
>
> > Run "gunzip xen-4.5.1_10-1.gz", and then run "file" on the
uncompressed file.
> > If it's a 32-bit binary, and the dumpfile came from that kernel, then you
need
> > to use a 32-bit crash utility binary. If the dumpfile came from a 64-bit
kernel,
> > then you're using the wrong xen binary.
>
> According to this
> post(http://lists.xen.org/archives/html/xen-users/2015-10/msg00141.html),
> although the xen file is 32-bit, it is the correct file for running on
> 64-bit OS. So I am not sure it should be considered as a bug.
No it's not a bug.
The file you mentioned is only used for booting the hypervisor. For debugging
the hypervisor a statically linked hypervisor file has to be used.
On SLES11 SP4 I have for booting the xen hypervisor:
# file xen-4.4.2_12-23.1
xen-4.4.2_12-23.1_x2: ELF 32-bit LSB executable, Intel 80386, version 1
(SYSV), statically linked, stripped
For working with crash and the vmcore:
# file xen-syms-4.4.2_12-23.1
xen-syms-4.4.2_12-23.1_x2: ELF 64-bit LSB executable, x86-64, version 1
(SYSV), statically linked, not stripped
Hi Dietmar,
Thanks for clarifying that. I should have noticed he was trying to use the
actual xen binary instead of the xen-syms file -- which is specified in the
crash(8) man page.
And I wasn't even aware that the actual xen binary is a 32-bit image -- good
to know...
Thanks,
Dave
>
> >> (3)
> >>
> >> WARNING: could not find MAGIC_START!
> >> WARNING: cannot read linux_banner string
> >> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_FjRFMJ and /dev/mem do not
> >> match!
> >>
> >> How can I fix this issue and run crash on SuSE?
>
> > For starters, make sure the kernel, the dumpfile, and the crash binary
> > are all
> > 32-bit or all 64-bit, whichever is appropriate.
>
> # which crash
> /usr/bin/crash
>
> # file /usr/bin/crash
> /usr/bin/crash: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
> dynamically linked (uses shared libs), for GNU/Linux 3.0.0,
> BuildID[sha1]=e6f9921f98c5b4daedd8dac798c139b77676b588, stripped
>
> Using "crash /boot/vmlinux-3.12.49-6-xen.gz /proc/kcore" works OK:
This is expected as this is similar to the xen behaviour.
For booting:
# file vmlinuz-3.0.101-63-xen
vmlinuz-3.0.101-63-xen: Linux/x86 Kernel, Setup Version 0x20b, bzImage,
Version 3.0.101, Version 3.0.101-63, RO-rootFS, swap_dev 0x3, Normal VGA
And for debugging:
# file vmlinux-3.0.101-63-xen
vmlinux-3.0.101-63-xen: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
statically linked, not stripped
Dietmar.
>
> # file /proc/kcore
> /proc/kcore: ELF 64-bit LSB core file x86-64, version 1 (SYSV),
> SVR4-style, from 'root=UUID=ed63d5d7-1d2f-45ea-a77b-5b3ae05c1c2e
> resume=/dev/sda1 splash=silent q'
>
> # crash /boot/vmlinux-3.12.49-6-xen.gz /proc/kcore
>
> crash 7.1.3
> Copyright (C) 2002-2014 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) 7.6
> Copyright (C) 2013 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 "x86_64-unknown-linux-gnu"...
>
> KERNEL: /boot/vmlinux-3.12.49-6-xen.gz
> DEBUGINFO: /usr/lib/debug/boot/vmlinux-3.12.49-6-xen.debug
> DUMPFILE: /proc/kcore
> CPUS: 1
> DATE: Mon Nov 16 00:59:02 2015
> UPTIME: 04:55:39
> LOAD AVERAGE: 0.08, 0.03, 0.05
> TASKS: 241
> NODENAME: linux-6ev3
> RELEASE: 3.12.49-6-xen
> VERSION: #1 SMP Mon Oct 26 16:05:37 UTC 2015 (11560c3)
> MACHINE: x86_64 (2596 Mhz)
> MEMORY: 855.2 MB
> PID: 7472
> COMMAND: "crash"
> TASK: ffff880019ab6540 [THREAD_INFO: ffff880002dcc000]
> CPU: 0
> STATE: TASK_RUNNING (ACTIVE)
>
> So I think all the files are 64-bits.
>
> Thanks!
> Best Regards
> Nan Xiao
>
>
> On Fri, Nov 13, 2015 at 10:54 PM, Dave Anderson <anderson(a)redhat.com>
> wrote:
> >
> >
> > ----- Original Message -----
> >> Hi all,
> >>
> >> Firstly, I am not sure whether posting this issue on this mailing list
> >> is appropriate, if not,
> >> please forgive me, thanks!
> >>
> >> I install SuSE Enterprise Linux 12 (Xen version) on VirtualBox, and want
> >> to use crash.
> >> Executing "crash" command, and the output likes this:
> >>
> >> # crash
> >>
> >> crash 7.1.3
> >> Copyright (C) 2002-2014 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.
> >>
> >> crash: /boot/symtypes-3.12.49-6-xen.gz: original filename unknown
> >> Use "-f /boot/symtypes-3.12.49-6-xen.gz" on command line to
prevent
> >> this message.
> >>
> >> crash: /boot/symtypes-3.12.49-6-default.gz: original filename unknown
> >> Use "-f /boot/symtypes-3.12.49-6-default.gz" on command line
to
> >> prevent this message.
> >>
> >> crash: /boot/xen-4.5.1_10-1.gz: original filename unknown
> >> Use "-f /boot/xen-4.5.1_10-1.gz" on command line to prevent
this
> >> message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.5.1_10-1.gz_E5lLat: X86
> >>
> >> crash: /boot/xen-4.5.gz: original filename unknown
> >> Use "-f /boot/xen-4.5.gz" on command line to prevent this
message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.5.gz_0BL7f2: X86
> >>
> >> crash: /boot/xen-4.gz: original filename unknown
> >> Use "-f /boot/xen-4.gz" on command line to prevent this
message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.gz_PW97tB: X86
> >>
> >> crash: /boot/xen-dbg-4.5.1_10-1.gz: original filename unknown
> >> Use "-f /boot/xen-dbg-4.5.1_10-1.gz" on command line to prevent
this
> >> message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg-4.5.1_10-1.gz_zcILOa: X86
> >>
> >> crash: /boot/xen-dbg-4.5.gz: original filename unknown
> >> Use "-f /boot/xen-dbg-4.5.gz" on command line to prevent this
message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg-4.5.gz_AEpJfK: X86
> >>
> >> crash: /boot/xen-dbg-4.gz: original filename unknown
> >> Use "-f /boot/xen-dbg-4.gz" on command line to prevent this
message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg-4.gz_np36Nj: X86
> >>
> >> crash: /boot/xen-dbg.gz: original filename unknown
> >> Use "-f /boot/xen-dbg.gz" on command line to prevent this
message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-dbg.gz_1tAiuT: X86
> >>
> >> crash: /boot/xen.gz: original filename unknown
> >> Use "-f /boot/xen.gz" on command line to prevent this message.
> >>
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen.gz_htZLuv: X86
> >>
> >> crash: /boot/symvers-3.12.49-6-xen.gz: original filename unknown
> >> Use "-f /boot/symvers-3.12.49-6-xen.gz" on command line to
prevent
> >> this message.
> >>
> >> GNU gdb (GDB) 7.6
> >> Copyright (C) 2013 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 "x86_64-unknown-linux-gnu"...
> >>
> >> WARNING: could not find MAGIC_START!
> >> WARNING: cannot read linux_banner string
> >> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_FjRFMJ and /dev/mem do not
> >> match!
> >>
> >> Usage:
> >>
> >> crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS] (dumpfile form)
> >> crash [OPTION]... [NAMELIST] (live system
> >> form)
> >>
> >> Enter "crash -h" for details.
> >>
> >> My question are as follows:
> >>
> >> (1) There are so may warnings like this:
> >>
> >> crash: xxxxxx: original filename unknown
> >> Use "-f xxxxxx" on command line to prevent this message.
> >>
> >> Do I need to add somay "-f xxxxxx" options on command line? Is
there
> >> any better method?
> >
> > The message above simply mean that the original filename of the
> > compressed
> > file was not stored in the file's header. That means that whoever
> > created
> > the compressed file used "gzip -n" or "--no-name":
> >
> > $ man gzip
> > ... [ cut ] ...
> >
> > -n --no-name
> > When compressing, do not save the original file name and time
> > stamp by default. (The original name is always saved if the
> > name
> > had to be truncated.) When decompressing, do not restore the
> > original file name if present (remove only the gzip suffix from
> > the compressed file name) and do not restore the original time
> > stamp
> > if present (copy it from the compressed file). This option is
> > the
> > default when decompressing.
> > ...
> >
> >> (2) "machine type mismatch"
> >> WARNING: machine type mismatch:
> >> crash utility: X86_64
> >> /var/tmp/xen-4.5.1_10-1.gz_E5lLat: X86
> >>
> >> But according to "uname -a":
> >>
> >> # uname -a
> >> Linux linux-6ev3 3.12.49-6-xen #1 SMP Mon Oct 26 16:05:37 UTC 2015
> >> (11560c3) x86_64 x86_64 x86_64 GNU/Linux
> >>
> >> The running SuSE is also a 64-bit OS, so whether can remove these
> >> warnings?
> >
> > The mismatch message says that "/var/tmp/xen-4.5.1_10-1.gz_E5lLat" is
an
> > X86
> > 32-bit binary. You cannot use a 32-bit xen binary with a 64-bit crash
> > utility
> > binary.
> >
> > Run "gunzip xen-4.5.1_10-1.gz", and then run "file" on the
uncompressed
> > file.
> > If it's a 32-bit binary, and the dumpfile came from that kernel, then you
> > need
> > to use a 32-bit crash utility binary. If the dumpfile came from a 64-bit
> > kernel,
> > then you're using the wrong xen binary.
> >
> >> (3)
> >>
> >> WARNING: could not find MAGIC_START!
> >> WARNING: cannot read linux_banner string
> >> crash: /var/tmp/vmlinux-3.12.49-6-xen.gz_FjRFMJ and /dev/mem do not
> >> match!
> >>
> >> How can I fix this issue and run crash on SuSE?
> >
> > For starters, make sure the kernel, the dumpfile, and the crash binary are all
> > 32-bit or all 64-bit, whichever is appropriate.
> >
> > Dave
> >
> >>
> >> Thanks very much in advance!
> >> Best Regards
> >> Nan Xiao
> >>
> >> --
> >> Crash-utility mailing list
> >> Crash-utility(a)redhat.com
> >> https://www.redhat.com/mailman/listinfo/crash-utility
> >>
> >
> > --
> > Crash-utility mailing list
> > Crash-utility(a)redhat.com
> > https://www.redhat.com/mailman/listinfo/crash-utility
>
> --
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>
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