x64 Assembly and C++ Tutorial 9: Passing Integers to and from C++ and Assembly

This is the 9th tutorial, we ll be looking at passing integer values to and from C++ and Assembly. The calling convention here is dictated by the C++ compiler we re using. In Microsoft s C++ compiler the parameters are passed by what s known as FastCall. FastCall is not a calling convention but a generic term for several different methods of passing parameters via the registers. The FastCall we will be examining is the Microsoft version, Linux uses System V fastcall which allows for a few more parameter br, br,