Assembly pass pointer to function

Question

I'm trying to sent DWORD variable into function as pointer paramater

variable1 dd 1
...
push [variable1]  ; push variable adress
call _InitPoiner
...
_InitPoiner:
    ;
    push ebp
    mov ebp, esp
    ;
    lea eax, [ebp+8]       ; load address
    mov dword [eax], 10    ; move value 10 into that address

    pop ebp
    ret
...
push [variable1]
push sdigit ; where sdigit db '%d', 0x0D, 0x0A, 0
call [printf]

but variable1 is 1, not 11 , why?

Answer 1

You are making sure that you pop your vars when done?

Looking at your example, I see no way that the variable could ever be 11. It starts as 1 at the dd assignment, then if your math in the lea is correct, it would then be 10. If you were to step this through a debugger, you could check if your lea / mov combo is working right. Either way, I would expect 1 or 10, not 11.

Maybe you meant to add instead of mov?