A hello-world-esque program in assembly!

hello_world.asm

; This program prints "Hack the planet!" to stdout
; @author Harrison <github.com/paked>
; I'd like to thank the academy for helping me get this far.

; build: `nasm -f elf64 -F stabs hello_world.asm`
; link: `ld -o hello_world hello_world.o`
; run: `./hello_world`


section .data ; group "data" related stuff into this section
 hello:     db 'Hack the Planet!',10 ; string to print to stout
 helloLen:  equ $-hello ; length of the string, used to set correct buffer size

section .text ; section for the text printing!
global _start ; allow _start to be publicly accesible as the entry point of the program
 
 _start: ; definition of the start procedure
  mov eax,4 ; sys_write function code
  mov ebx,1 ; set output to stdout

  mov ecx,hello  ; pass hello string into buffer
  mov edx,helloLen  ; specifiy the buffers length
  int 80h ; interupt the kernel with "hey execute that sys_call I just set up!"

  mov eax,1 ; sys_exit function code      
  mov ebx,0 ; set return code (0=OK,>0=SOMETHING WENT WRONG!)
  int 80h ; interupt the kernel with the sys_exit call that was just set up!