extern printf
global main
section .data
format db "%d ", 10, 0
section .text

call main
ret

factorial:
    push ebp
    mov ebp, esp

    cmp dword[ebp + 8], 0;n == 0
    jne recursive_return
    mov eax, 1
    jmp epilogue

    recursive_return:
        mov eax, [ebp + 8]
        sub eax, 1;n - 1
        push eax
        call factorial
        add esp, 4
        mov ebx, eax
        mov eax, [ebp + 8];n
        cdq;  edx:eax
        imul eax, ebx;n  * factorial(n - 1)

    epilogue:
        leave
        ret

main:
    push ebp
    mov ebp, esp
    push 7;n argument
    call factorial
    add esp, 4
    push eax
    push format
    call printf
    add esp, 8
    leave
    mov eax, 0
    ret