(Off-topic) Real-Time kernels on ARM

[Adam 'WeirdArms' Wiggins]

        I'm after any references or design information for real time
kernels on top of the ARM. What I'm after is how to design fast re-entrant
exception handlers given the sometimes painful register banking of ARM.
Conversly if real time kernels on arm handle register banking via
non-reentrant handlers please let me know. Any pointers appreciated.

        BTW are ARM linux exception handlers re-entrant? How preemptable
is ARM linux?

        Cheers Adam

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