AFAICT, Parrot uses function pointers for NCI. This means NCI uses whatever calling convention the compiler uses by default. Unfortunately, there's More Than One Way To Do It.
On Windows, there's the C calling convention (__cdecl), which is usually used by default by the Visual C++ compiler. There's also the standard (__stdcall) and fast (__fastcall) calling convention. I haven't seen any use of fastcall, but stdcall is used by the Win32 API. Using the wrong calling convention most certainly blows the stack. I think we need a way to select the calling convention for a function, similar to, or maybe even part of, the signature. Also, it would be good to have a way to select a calling convention when loading a library, as a calling convention is usually used consistently, and providing defaults for well known libraries. Ron
