> > 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
How do you get that info in the first place? I do not think CPU stores
info about last branch it did...
Pavel
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