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_21

21. Command Line

Jo Van Hoey¹ 

(1)

Hamme, Belgium

 

Sometimes you want to start a program at the command line using arguments that will be used by that program. This can be useful when developing your own CLI tools. System administrators use CLI tools all the time, because as a rule, CLI tools work faster for a knowledgeable user.

Accessing Command-Line Arguments

In the example program in Listing 21-1, we show how you can access command-line arguments within your assembly program. We keep it simple; we just find the arguments and print them.

;cmdline.asm

extern printf

section .data

     msg   db      "The command and arguments: ",10,0

     fmt   db      "%s",10,0 ...