section .data
msg     db      "Hello, World!", 0x0a
len     equ     $-msg

section .text
global _start

_start:
        mov     edx, 20
        add     edx, '0'        ; convert to ASCII
        push    dx              ; push to stack

        mov     eax, 0x04       ; write
        mov     ebx, 0x01       ; to STDOUT
        mov     ecx, esp
        mov     edx, 0x01       ; write 1 byte
        int     0x80

        mov     ebx, 0x00
        mov     eax, 0x01
        int     0x80