%include "IO_DEFS.asm"

; Because my memory is not working
;   x /11g $rsp

section .data
        hello   db `Hello World x\n`, 0
        helloLen equ $ - hello

section .bss

section .text
   global _start

;
;   note global variable
;
;   void PrintHello() {
;      cout << hello << endl;     
;   }

PrintHello:

    mov    eax, SYS_WRITE
    mov    edi, STDOUT
    mov    esi, hello
    mov    edx, helloLen
    syscall

    ret

_start:

    ;    i = 10
    ;    while (i > 0) {
    ;       --i
    ;       greeting[12] = i+'0'
    ;       PrintHello();
    ;    }

    ;    r8 is the lcv
    ;    r9 is the address of the character to change.
    ;    r10 is the character, r8+'0'

    mov r8d, 10
    lea r9, [hello+helloLen-3] 

top:

    dec r8d

    mov r10d, r8d
    add r10d, '0'

    mov [r9], r10b

    call PrintHello

    test r8d, r8d
    jnz top

    ; return 0
    ; Exit
    mov eax, SYS_EXIT
    mov edx, SUCCESS
    syscall