Get input length (max 8 letters)

;Well, I have some problems when I try to input more than 9 letters, not because the length of input,
;but because it is a little complicated to save number bigger than 9, so, for now,
;it is what it is, and soon I will share more codes
;Have a nice day ;)


%assign SYS_READ    3
%assign SYS_WRITE   4
%assign STDIN       0
%assign STDOUT      1

section .data
    msg1        db "The length is:",0xA
    len_msg1    equ $-msg1

segment .bss
    text        resb 8      ;reserve 8bits for letter (max 8 letters)
    textLength  resb 1      ;reserve 1bit to save the length

section .text
    global _start

_getLength:
    pushad          ;save the registers

    xor esi, esi    ;esi = 0
    mov ecx, 0      ;ecx = 0
    myloop:

        mov eax, [text + esi]   ;read letter in specific position
        inc esi         ;increment the position

        add ecx, 1          ;add 1

    cmp eax, 0      ;verify if is the end of string
    jne myloop      ;jne (jump if not equal) if is not the end of string, return to loop

    sub ecx, 2      ;it count's the end of string and stop in the next loop, so, it need to subtract 2
    add ecx, '0'    ;convert from decimal to ASCII
    mov [textLength], ecx   ;save length in variable

    popad           ;return the saved values to registers
    ret

_start:

    mov eax, SYS_READ   ;sys_read
    mov ebx, STDIN  ;stdit
    mov ecx, text   ;variable to save the input
    mov edx, 8      ;max length of input
    int 0x80

    call    _getLength

    mov eax, SYS_WRITE  ;sys_write
    mov ebx, STDOUT ;stdout
    mov ecx, msg1   ;variable to output
    mov edx, len_msg1   ;max length of output
    int 0x80

    mov eax, SYS_WRITE
    mov ebx, STDOUT
    mov ecx, textLength
    mov edx, 1
    int 0x80

    mov eax, 1      ;system call number (sys_exit)
    xor ebx, ebx    ;ebx = 0 (success)
    int     0x80        ;call kernel