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_19

19. Console I/O

Jo Van Hoey¹ 

(1)

Hamme, Belgium

 

We already know how to do console output using system calls or using printf. In this chapter, we will again use system calls, not only for display on the screen but also for accepting input from the keyboard.

Working with I/O

We could easily borrow functions from the C library, but that would spoil the assembly fun! So, Listing 19-1 shows the example source code.

; console1.asm

section .data

      msg1       db    "Hello, World!",10,0

      msg1len    equ   $-msg1

      msg2       db    "Your turn: ",0

      msg2len    equ   $-msg2

      msg3       db    "You answered: ",0

      msg3len    equ   $-msg3 ...