> I mean if you have a macro assembler you should be able to write a macro that generates "save registers" instructions before a section of code and "restore re

> I mean if you have a macro assembler you should be able to write a macro that generates "save registers" instructions before a section of code and "restore registers" instructions after it. Except you want a "macro" which: - saves only the registers you touched - which are callee-saved - according to the ABI you're targeting And you really only want that for functions, because... that's where ABIs come into play.