[Fwd: [Crash-utility] crash warnings]
David Wilder
dwilder at us.ibm.com
Thu May 4 01:05:26 UTC 2006
Dave Anderson wrote:
>Badari Pulavarty wrote:
>
>
>
>>...
>>
>>
>>
>>>>original non-g built vmlinux, things would work.
>>>>
>>>>In your case, it's defaulting to the /usr/src/linux/System.map, which is
>>>>associated with the vmlinux that you built with -g.
>>>>
>>>>Presuming you have the /boot/System.map associated with the original
>>>>distro's vmlinux file (the kernel that's running), what happens if you do
>>>>this:
>>>>
>>>>$ crash vmlinux /boot/System.map [vmcore]
>>>>
>>>>
>>Much better with /boot/System.map.
>>
>>
>>
>
>Yay!
>
>So, we seem to have resolved the funky text disassembly issue...
>
>But I still would like to continue working with the vmcore -- I'm sitting here
>with Vivek, and he will grab a copy of the System.map.
>
>Thanks, (and phew...)
>
>Dave
>
>
>
>
>>elm3a242:/usr/src/linux # /root/cr*23/crash vmlinux /boot/System.map-2.6.16-20-smp
>>
>>crash 4.0-2.23
>>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.
>>Type "show copying" to see the conditions.
>>There is absolutely no warranty for GDB. Type "show warranty" for
>>details.
>>This GDB was configured as "x86_64-unknown-linux-gnu"...
>>
>> SYSTEM MAP: /boot/System.map-2.6.16-20-smp
>>DEBUG KERNEL: vmlinux (2.6.16-20-smp)
>> DUMPFILE: /dev/mem
>> CPUS: 2
>> DATE: Thu Apr 27 03:18:57 2006
>> UPTIME: 16:47:17
>>LOAD AVERAGE: 0.00, 0.00, 0.00
>> TASKS: 64
>> NODENAME: elm3a242
>> RELEASE: 2.6.16-20-smp
>> VERSION: #1 SMP Mon Apr 10 04:51:13 UTC 2006
>> MACHINE: x86_64 (3000 Mhz)
>> MEMORY: 4.6 GB
>> PID: 12963
>> COMMAND: "crash"
>> TASK: ffff810121ef5790 [THREAD_INFO: ffff81011d3c4000]
>> CPU: 1
>> STATE: TASK_RUNNING (ACTIVE)
>>
>>crash> dis sys_read
>>0xffffffff8017b751 <sys_read>: push %r13
>>0xffffffff8017b753 <sys_read+2>: mov %rsi,%r13
>>0xffffffff8017b756 <sys_read+5>: push %r12
>>0xffffffff8017b758 <sys_read+7>: mov $0xfffffffffffffff7,%r12
>>0xffffffff8017b75f <sys_read+14>: push %rbp
>>0xffffffff8017b760 <sys_read+15>: mov %rdx,%rbp
>>0xffffffff8017b763 <sys_read+18>: push %rbx
>>0xffffffff8017b764 <sys_read+19>: sub $0x18,%rsp
>>0xffffffff8017b768 <sys_read+23>: lea 0x14(%rsp),%rsi
>>0xffffffff8017b76d <sys_read+28>: callq 0xffffffff8017bce3
>><fget_light>
>>0xffffffff8017b772 <sys_read+33>: test %rax,%rax
>>0xffffffff8017b775 <sys_read+36>: mov %rax,%rbx
>>0xffffffff8017b778 <sys_read+39>:
>> je 0xffffffff8017b7b1 <sys_read+96>
>>0xffffffff8017b77a <sys_read+41>: mov 0x38(%rax),%rax
>>0xffffffff8017b77e <sys_read+45>: lea 0x8(%rsp),%rcx
>>0xffffffff8017b783 <sys_read+50>: mov %rbp,%rdx
>>0xffffffff8017b786 <sys_read+53>: mov %r13,%rsi
>>0xffffffff8017b789 <sys_read+56>: mov %rbx,%rdi
>>0xffffffff8017b78c <sys_read+59>: mov %rax,0x8(%rsp)
>>0xffffffff8017b791 <sys_read+64>: callq 0xffffffff8017b2ef
>><vfs_read>
>>0xffffffff8017b796 <sys_read+69>: mov %rax,%r12
>>0xffffffff8017b799 <sys_read+72>: mov 0x8(%rsp),%rax
>>
>>--
>>Crash-utility mailing list
>>Crash-utility at redhat.com
>>https://www.redhat.com/mailman/listinfo/crash-utility
>>
>>
>
>--
>Crash-utility mailing list
>Crash-utility at redhat.com
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>
>
Dave I am seeing a similar problem to Badari, however in my case I am
running the kernel built with -g.
I can run crash live fine. But running on a vmcore I get the following
error.
deimos:/var/log/dump/2006-05-02-13:10 # ~/crash-4.0-2.24/crash
/usr/src/linux/vmlinux ./vmcore
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.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "powerpc64-unknown-linux-gnu"...
Wilder vmlist = 0xc00000000fa26940
crash: read error: kernel virtual address: c00000000fa26940 type: "first
vmlist
addr"
Errors like the one above typically occur when the kernel and memory source
do not match. These are the files being used:
KERNEL: /usr/src/linux/vmlinux
DUMPFILE: ./vmcore
--
When I check System.map for vmlist or do a "nm vmlinux | grep vmlist" I
get a different number than shown above.
I tried specifying the System.map file on the command line but no
difference.
--
David Wilder
IBM Linux Technology Center
Beaverton, Oregon, USA
dwilder at us.ibm.com
(503)578-3789
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