Nasm Linux: writing an input integer and print to console

Asked Nov 18 '17 at 14:22

Active Nov 18 '17 at 14:47

Viewed 525 times

What is wrong with my code? I successfully get the input number stored in ecx, but can't seem to print the same 1-digit number to console. I'm very frustrated as I believe to have everything right.

Code:

section .bss
n resb 4

section .text

global _start
_start:

call ReadInt
call PrintInt

mov eax,1
mov ebx,0
int 80h

ReadInt:
mov eax,3
mov ebx,0
mov ecx,n
mov edx,1
int 80h
mov ecx,[n]
sub ecx,'0'
mov [n],ecx
ret

PrintInt:
mov eax,4
mov ebx,1
int 80h
ret

edited Nov 18 '17 at 14:47

Michael Petch

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asked Nov 18 '17 at 14:22

Vegard Haugstvedt

Linux system write prints strings not integers. You need to supply a pointer to a string in _ECX_ to print something. – Michael Petch Nov 18 '17 at 14:47
1

Might ant to look at: https://stackoverflow.com/questions/8194141/how-to-print-a-number-in-assembly-nasm – Michael Petch Nov 18 '17 at 15:10

Nasm Linux: writing an input integer and print to console

0 Answers0