[Fwd: [Crash-utility] crash warnings]

[Dave Anderson]

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
>
> --
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