Examples of Programs For Various Operating Systems
This is a Hello world program for the DOS operating system.
section .text org 0x100 mov ah, 0x9 mov dx, hello int 0x21 mov ax, 0x4c00 int 0x21 section .data hello: db 'Hello, world!', 13, 10, '$'An example of a similar program for Microsoft Windows:
global _start extern _MessageBoxA@16 extern _ExitProcess@4 section code use32 class=code _start: push dword 0 ; UINT uType = MB_OK push dword title ; LPCSTR lpCaption push dword banner ; LPCSTR lpText push dword 0 ; HWND hWnd = NULL call _MessageBoxA@16 push dword 0 ; UINT uExitCode call _ExitProcess@4 section data use32 class=data banner: db 'Hello, world!', 0 title: db 'Hello', 0An equivalent program for Linux:
section .data msg: db "Hello, world!", 10 .len: equ $ - msg section .text global _start _start: mov eax, 4 ; write mov ebx, 1 ; stdout mov ecx, msg mov edx, msg.len int 0x80 mov eax, 1 ; exit mov ebx, 0 int 0x80Read more about this topic: Netwide Assembler
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