Inline assembly that clobbers the red zone

Question

I\'m writing a cryptography program, and the core (a wide multiply routine) is written in x86-64 assembly, both for speed and because it extensively uses instructions like <

Answer 1

Can't you just modify your assembly function to meet the requirements of a signal in the x86-64 ABI by shifting the stack pointer by 128 bytes on entry to your function?

Or if you are referring to the return pointer itself, put the shift into your call macro (so sub %rsp; call...)