inconsistent order of notify_die and kgdb/debugger between powerpc and x86

I see in x86, the die chain notifiers are called first
before going to debugger but in powerpc its the
other way round.
Any reason for this inconsistency?
Because, I wanted to take some action before falling
to debugger in powerpc. Is there any cleaner way to do this which would work
irrespective of the architecture?

Thanks,
Fredrick