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Date: Tue, 30 Sep 2003 12:14:55 -0700
From: David Daney <ddaney@avtrex.com>
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To: Sudeep Kottilingal <skottilingal@kinetowireless.com>
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	Joe Baranowski <jbaranowski@kinetowireless.com>
Subject: Re: Backtrace capability
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Sudeep Kottilingal wrote:

> Hi all,
>
> I am trying to debug some SIGSEGV when I leave my system ON for a few 
> days. At the time of the
>
> Crash I am not able to get a nice back-trace/stack trace yet. (I do 
> not see the execinfo.h file on my uclibc toolchain
>
> Which implies its not supported yet on my toolchain release).
>
> *Has anyone had success in incorporating backtrace capability into a 
> uclibc binary yet …?*
>
> *If your answer is yes, could u give me some pointers on how to do it 
> and set it up ..?*
>
> *If your answer is no is there any other alternative set up to get 
> more information.*
>
> I do not run an ICD or ICE on my board. Neither do I have a serial 
> console. My console is redirected via Telnet.
>
> Currently I am running the application which crashes on the linux PC 
> through totalview debugger.
>
> Waiting for it to crash.
>
> sudeep
>
I hacked together a backtrace that you may be able to adapt. It was 
originally for gcj, but we use several variations for other things as 
well. It kind of relies on an o32 ABI calling convention.

The code is in this mail message:

http://gcc.gnu.org/ml/java-patches/2003-q3/msg00584.html

Look at:

libjava/sysdep/mips/mipsel-backtracer.c
libjava/sysdep/mips/mipsel-backtracer.h
libjava/sysdep/mips/mipsel-bthelper.S

David Daney