From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Re: 2.6.28.7 domU: 32-bit emulation seems to be broken
Date: Sun, 15 Mar 2009 10:45:46 -0700
Message-ID: <49BD3ECA.1050409@goop.org>
References: <gpe0vg$j67$1@ger.gmane.org>	<gpei6e$gcn$1@ger.gmane.org>	<49BAFC72.4040501@goop.org>	<49BB0184.1020503@goop.org>	<49BB6F4A.90000@gmail.com>	<49BC2994.6040404@goop.org>	<49BCE8F6.50504@gmail.com>
	<49BD1F87.8040008@goop.org> <49BD3E3D.6000607@gmail.com>
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To: =?ISO-8859-15?Q?Sven_K=F6hler?= <sven.koehler@gmail.com>
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Sven K=F6hler wrote:
> Jeremy Fitzhardinge schrieb:
>  =20
>> Sven K=F6hler wrote:
>>    =20
>>>> Can you get a coredump from the fault and see what the faulting
>>>> instruction was?
>>>>    =20
>>>>        =20
>>> How do I do that?
>>> Sorry for the stupid question, but unfortunatly this is beyond my
>>> knowledge of the tooldchain :-(
>>>      =20
>> $ ulimit -c unlimited
>> $ ./a.out
>> Segmentation Fault (core dumped)
>> $ ls core.*
>> core.XXXXX
>> $ gdb ./a.out core.*
>> [...]
>> (gdb) x/i $eip-2
>>
>> It will help to compile your a.out with -g.
>>    =20
>
> # ulimit -c unlimited
> # ./a.out
> Segmentation fault (core dumped)
> # gdb a.out core
> GNU gdb 6.8
> Copyright (C) 2008 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 copyi=
ng"
> and "show warranty" for details.
> This GDB was configured as "x86_64-pc-linux-gnu"...
> Core was generated by `./a.out'.
> Program terminated with signal 11, Segmentation fault.
> [New process 13256]
> #0  0xf7f3642f in __kernel_vsyscall ()
> (gdb) x/i $eip-2
> 0xf7f3642d <__kernel_vsyscall+13>:      jmp    0x25f4278f
> (gdb)
>  =20

Hm.  How about "x/30i __kernel_vsyscall"?

    J