large loops or something causes stack overflow

[assyrianic]

Made this following code to profile calling C functions from a script 10 million times. Some how, this script is causing a stack overflow...

$stacksize 0xFF
$global test_str, 13, "hello world\n"
$native %strlen    ; size_t strlen(const char *);

; int main()
; {
;   int length = 0;
;   for (int i = 0; i < iterations; i++)
;       length = strlen(s);
; }

%main: {
    mov [long rbp-4], 0 ; int length = 0;
    mov [long rbp-8], 0 ; int i = 0;
    jmp .L2
.L3:
    lea rsemkath, test_str
    syscall %strlen, 1
    mov [long rbp-4], ralaf
    inc [long rbp-8]
.L2:
    lt [long rbp-8], 10000000
    jnz .L3
    mul [long rbp-4], 10000000
    mov ralaf, [long rbp-4]
    ret
}