While loop in assembly with increment only prints once, can't figure out why(nasm)

Question

I've tried all sorts of <, <= to commands for the exit but it will only print the message once. Trying to get it to print on each iteration. I've got a ton of tabs open and have tried a lot, but can't figure this one out.

    mov rax,0
    mov rbx,6
WhileLoop: 
    Cmp rax,rbx         ;loop termination condition (rax<6)
    jge WhileDone       ;if !<6, exit while loop
    mov rdi, message2   ;print message
    mov al, 0           ;print message
    call printf         ;print message
    inc rax             ;rax=rax+1
    jmp WhileLoop       ;next iteration 
WhileDone:

Answer 1

It's possible that the procedure "printf" is modifying rax or rbx. So, let's preserve them before "printf", and restore them after "printf" :

    mov rax,0
    mov rbx,6
WhileLoop: 
    Cmp rax,rbx         ;loop termination condition (rax<6)
    jge WhileDone       ;if !<6, exit while loop
    PUSH RAX
    PUSH RBX
    mov rdi, message2   ;print message
    mov al, 0           ;print message
    call printf         ;print message
    POP  RBX
    POP  RAX
    inc rax             ;rax=rax+1
    jmp WhileLoop       ;next iteration 
WhileDone: