Tom Quarendon wrote: > If I do this I get std::terminate called from __cxa_throw. Researching > this it seems that I somehow need to register some exception handling > tables to correspond to the "magic" function to enable the exception > handler to allow the exception to propagate through.
Right. > I'd welcome any pointers to where I might be able to get some > information on this. I've looked at the C++ ABI documentation which > helps a bit, and I've found some information on the format that the > tables need to be in (and indeed I've looked at the assembler generated > by the gcc compiler if I code up "magic" and compile it directly), but I > don't yet see quite how to put it all together. There's no quick way to solve this: you'll just have to study DWARF unwinder data and figure out how to generate it. It's not particularly difficult, but there is a fair bit to learn. As you're writing a JIT it may well be that you can use a simplified subset of DWARF; you don't need to cater for every possibility. Call __register_frame_info() when you're done. Andrew.
