linux-kernel - Re: Segmentation fault details?

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Message-Id: <E1KWzeO-0004TU-Hr@be1.7eggert.dyndns.org>
Date:	Sat, 23 Aug 2008 22:23:55 +0200
From:	Bodo Eggert <7eggert@....de>
To:	Wang Yi <leonidwang@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: Segmentation fault details?

Wang Yi <leonidwang@...il.com> wrote:

>  I'd like to know some details about segmentation fault.
>  What I mean is when a program accesses invalid memory area, it will
> get a SIGSEGV signal from kernel, and a message "Segmentation fault".
> 
>  I also find that dmesg can show we something like this:
>  ProgramName[Pid]: segfault at xxxx eip xxxx esp xxxx error x
>  It is useful and provides the first-step information for further
> debug/analysis.
> 
>  My question is how dmesg gets the information, and if there are any
> "decent" way to get this and maybe more information(An "indecent" way
> I came to is grep dmesg)
> so that I can perform some basic auto analysis.

I'm wondering if the default handler might print this information isntead
of the plain segmentation violation.

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