Slide 1

•FunctionParameters!arithmetic:

push ebp ; establishing stack frame

•mov ebp,esp ;

sub esp,0xc0 ; creating stack frame for locals

push ebx ; saving registers that might be used

push esi ; outside

push edi ;

lea edi,[ebp-0xc0] ; getting lowest address of stack frame

mov ecx,0x30 ; filling stack frame with 0xCC

mov eax,0xcccccccc ;

rep stosd ;

mov eax,[ebp+0xc] ; eax := [b]

•add eax,[ebp+0x8] ; eax += [a]

•mov [ebp+0xc],eax ; [b] := eax (b = b + a)

mov eax,[ebp+0x8] ; eax := [a]

add eax,0x1 ; eax := eax + 1

mov [ebp+0x8],eax ; [a] := eax (++a)

•mov eax,[ebp+0x8] ; eax := [a]

•imul eax,[ebp+0xc] ; eax := eax * [b]

mov [ebp+0xc],eax ; [b] := eax (b = a * b)

mov eax,[ebp+0xc] ; eax := [b] (return value, b)

pop edi ; restoring registers

•pop esi ; (in reverse order)

•pop ebx ;

mov esp,ebp ; restoring previous stack pointer

pop ebp ; restoring previous stack frame

•Ret ; return 0

•