search for: builtin_return_address

...ns to work on PPC darwin. After much > digging and confusion, there seem > to be two separate issues. Ok. > The gcc testsuite is running the version of the unwinding code that > was built with the local (llvm-)gcc, > which doesn't work because nobody has implemented > builtin_return_address for that target. > So that's one problem. That's an easy problem. I just implemented __builtin_return_address on PPC, at least builtin_return_address(0), please let me know if that is sufficient. > More seriously, the version of the unwinding code installed on the > system...

So I couldn't get exceptions to work on PPC darwin. After much digging and confusion, there seem to be two separate issues. The gcc testsuite is running the version of the unwinding code that was built with the local (llvm-)gcc, which doesn't work because nobody has implemented builtin_return_address for that target. So that's one problem. More seriously, the version of the unwinding code installed on the system doesn't work either, for a different reason (and also doesn't work on x86 Darwin). It turns out the installed code has the following patch, which is not in the llvm-g...

Chris, > That's an easy problem. I just implemented __builtin_return_address > on PPC, at least builtin_return_address(0), please let me know if that > is sufficient. There are bunch of another builtins required for eh to execute properly. The 3 most important one are: - eh_return - unwind_init - dwarf_cfa The first two precisely match to the gcc's ones, the thir...