Re: [Fwd: Re: wargame issue]

[Joe Barrett <barrettj () umd edu>]

haad wrote:

> I try to compile this code an view assembly source but i see thi in
> my function prolog
>
> pushl %ebp movl %esp, %ebp subl $40, %esp
>
> i have my stack subtracted by 40. Why ??? I don't understand .

The function prologue sets up the stack and frame pointers for this
new function and allocates 40 bytes of space on the stack (remember,
the stack grows down, hence to allocate space you subtract from it -
and to deallocate space in your epilogue, you add to the stack pointer).

Cheers,
Joe Barrett