class Code { private: static DWORD protect; static LPVOID adress; static SIZE_T size; public: enum HOOK_TYPE { JUMP, CALL }; static void BeginWrite(DWORD adress, DWORD size); static void EndWrite(); static void Write(DWORD adress, BYTE value); static void Write(DWORD adress, WORD value); static void Write(DWORD adress, DWORD value); static void WriteAdd(DWORD adress, DWORD value); static void Hook(DWORD adress, LPVOID procedure, HOOK_TYPE type); };
void Code::BeginWrite(DWORD a, DWORD s) { adress = (LPVOID)a; size = (SIZE_T)s; VirtualProtect(adress, size, PAGE_READWRITE, &protect); } void Code::EndWrite() { VirtualProtect(adress, size, protect, NULL); } void Code::Write(DWORD adress, BYTE value) { *(LPBYTE)adress = value; } void Code::Write(DWORD adress, WORD value) { *(LPWORD)adress = value; } void Code::Write(DWORD adress, DWORD value) { *(LPDWORD)adress = value; } void Code::WriteAdd(DWORD adress, DWORD value) { *(LPDWORD)adress += value; } void Code::Hook(DWORD adress, LPVOID procedure, HOOK_TYPE type) { if (type == HOOK_TYPE::JUMP) Write(adress, (BYTE)0xE9); //write JMP opcode else //if (type == HOOK_TYPE::CALL) Write(adress, (BYTE)0xE8); // write CALL opcode Write(adress + 1, (DWORD)procedure - adress - 5); }
void Patch() { // ... Code::BeginWrite(0x401000, 0x239000); // ... // ADVMAN window size - FS Code::Write((0x401530 + 1), (DWORD)screen_Height); Code::Write((0x401537 + 1), (DWORD)screen_Width); // ADVMAN window: world view size Code::WriteAdd((0x401608 + 1), (DWORD)common_stretching_Y); Code::WriteAdd((0x40160d + 1), (DWORD)common_stretching_X); // ... Code::EndWrite(); }
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