Re: [patch] thread-aware coredumps, 2.5.43-C3

[Mark Gross]

On Thursday 17 October 2002 07:12 pm, Andi Kleen wrote:
> I want the x86 CPU error code, which often has interesting clues on the
> problem. trapno would be useful too. I suspect other CPUs have similar
> extended state for exceptions.
>
> I usually hack my kernel to printk() it, but having it in the coredump
> would be more general and you can look at it later.
>
> Eventually (in a future kernel) I would love to have the exception
> handler save the last branch debugging registers of the CPU and the let the
> core dumper put that into the dump too.  Then you could easily
> figure out what the program did shortly before the crash.
>
> -Andi

Having the last branch before a crash would be cool.  Its easy to add note 
sections to core files.  If it turns out to be useful I'm sure the GDB folks 
would support it. 

--mgross