Hello World!

.data
hello:
   .ascii "Hello World!\n"
   len = . - hello
.text
   .global _start
_start:
   movl $4,     %eax
   movl $1,     %ebx
   movl $hello, %ecx
   movl $len,   %edx
   int $0x80

   movl $1, %eax
   movl $0, %ebx
   int $0x80