Hola2.s

        .data                   #data section declaration
msg:    .ascii  "Hello, World!\n"
        len = . - msg           #string length

        .text                   #code section declaration
        .global main          #entry point (start of execution)
main:   pushl   $len            #string length
        pushl   $msg            #string start
        pushl   $1              #file handle: stdout
        movl    $4,%eax         #sys_write
        call    sys_call
        addl    $12,%esp        #clean up stack

        pushl   $0              #return value
        movl    $1,%eax         #sys_exit
        call    sys_call

sys_call:
        int     $0x80           #kernel system call
        ret