hello-world.asm

section .data
  msg db "Welcome!", 10 ; 10 is ASCII code for the new line

section .text
  global _start

_start:
  mov rax, 1 ; "1" is the %rax value for "sys_write"
  mov rdi, 1
  mov rsi, msg
  mov rdx, 9
  syscall

  mov rax, 60 ; "60" is the %rax value for "sys_exit"
  mov rdi, 0
  syscall