Using base pointer register in C++ inline asm

Question

I want to be able to use the base pointer register (%rbp) within inline asm. A toy example of this is like so:

void Foo(int &x)
{
    asm vo         


        

Answer 1

In x86-64, the stack pointer needs to be aligned to 8 bytes.

This:

subq $12, %rsp;      // make room

should be:

subq $16, %rsp;      // make room