How to explicitly push/pop to the C return stack?

Question

Is there a way to explicitly push/pop data to the C return stack? (Ideally in standard C, but a GCC-only solution would be ok too.)

I'm implementing a Forth in C, on a microcontroller that's very tight on RAM (kbytes, not Mbytes).

I'm allocating RAM for the data stack, but I'm hoping to save some RAM by sharing the Forth return stack with the C return stack, via explicit push/pops.

Can this be done in C?

Answer 1

GCC has a __builtin_return_address function, that's probably the closest you'll get.