Beginning x64 Assembly Programming: From Novice to AVX Professional

© Jo Van Hoey 2019

J. Van HoeyBeginning x64 Assembly Programminghttps://doi.org/10.1007/978-1-4842-5076-1_15

15. Calling Conventions

Jo Van Hoey¹ 

(1)

Hamme, Belgium

 

Calling conventions describe how you transfer variables to and from functions. If you will be using only functions that you have built yourself, you do not have to care about calling conventions. But when you are using C functions from the C library, you need to know in which registers you have to put the values to be used by that function. Also, if you write assembly functions for building a library that will be used by other developers, you’d better follow some convention for which registers to use for which function arguments. Otherwise, you will have lots of conflicts with arguments. ...