Return address save/restore logic is broken

Question

Return address save/restore logic is broken

tansly opened this issue 6 years ago · 2 comments

Answer 1 · 2019-01-18T09:13:42.000Z

Return address gets overwritten

Answer 2 · 2019-01-18T09:15:53.000Z

Redesign the mechanism:
Treat $ra as a caller saved register. Caller saves it when making a call, restores it when the callee returns. Thus $ra will hold the return address while a function is running.
This way we won't need to save it at every label (thus get rid of the dirty hack) and don't need to restore at return statements.