HP-PA ABI issues - framepointer handling

[David Edelsohn]

>>>>> Robert Dewar writes:

Robert> For example, on DEC Unix, we use the standard DEC Unwind functions, and
Robert> they work just fine for both gcc generated code and DEC compiler generated
Robert> code, and do not use dwarf-2 tables, so there is one example at least.

Robert> For SGI, we also use the system unwind procedure from SGI, and as far
Robert> as I know, that does NOT use dwarf-2.

	Correct me if I am wrong, but GNAT currently uses its own
exception handling mechanisms and not the GCC/G++ exception handling
infrastructure, right?  I do not see how it is possible to be compatible
with G++ given your goal of compatibility with the native, system unwind
mechanisms. 

David