函数框架

vc6.0 Debug方式下 //_c调用方式void add(int a,int b){int c = a + b}6: void add(int a,int b)7: {//保存ebp,并让ebp代替esp 因为ebp稳定00401010 push ebp00401011 mov ebp,esp//为变量预留空间0x4400401013 sub esp,44h//保存程序中使用到的寄存器00401016 push ebx00401017 push esi00401018 push edi//将局部变量初始化为0xcc/* while(ecx){mov dword ptr [edi],eaxedi = edi + 4} */00401019 lea edi,[ebp-44h]0040101C mov ecx,11h//计数器00401021 mov eax,0CCCCCCCCh00401026 rep stos dword ptr [edi]//mov dword ptr[edi],eax将edi=edi+4,知道ecx=08: int c = a + b;00401028 mov eax,dword ptr [ebp+8]//ebp+8 = 一参地址,ebp+0xc = 二参地址,ebp + 4 = 函数返回地址0040102B add eax,dword ptr [ebp+0Ch]0040102E mov dword ptr [ebp-4],eax9: }//恢复寄存器00401031 pop edi00401032 pop esi00401033 pop ebx//恢复esp,ebp00401034 mov esp,ebp00401036 pop ebp//pop xx jmp xx00401037 ret