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C++ Virtual Functions

I am having some problems running code containing C++ virtual functions in
rtems. When the code tries to branch to a virtual function address using
"bctrl" instruction, the address (in ctr) is way out of range and results in
a machine check exception.

Is there anything I need to do special in rtems for virtual functions to
work? Is anyone using virtual functions, pure or impure, in rtems? I am
still using rtems 4.6.1 and my ppc40x-derived bsp.