/* $begin hello64-s 1 */
.section .data
string:
        .ascii "hello, world\n"
string_end:
        .equ len, string_end - string
.section .text
.globl main
main:
        # First, call write(1, "hello, world\n", 13)
        movq $1, %rax        # write is system call 1        
        movq $1, %rdi        # Arg1: stdout has descriptor 1 
        movq $string, %rsi   # Arg2: hello world string
        movq $len, %rdx      # Arg3: string length           
        syscall              # Make the system call         

        # Next, call _exit(0)
        movq $60, %rax       # _exit is system call 60     
        movq $0, %rdi        # Arg1: exit status is 0      
        syscall              # Make the system call        
/* $end hello64-s 1 */