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GlosSI-fork/EnforceBindingDLL/EnforceBindings.h
Peter Repukat 38ba58ffa9 EnforceBindings: Generalized hooking function
Now I shouldn't have to patch GloSC as often...

 * In the function we want to hook the appID of the Chord bindings get referenced,
  it takes 3 arguments (we can get that from the function prolog)
  and it is the only one that does both. (in steamclient.dll)
  
  We search for the constant appID of SteamChard bindings
  move a bit upward and search for the correct function prolog

The function-prolog of the hooked function, get replaced with a jump to our hook
Our hook, then executed the missing function prolog,
patches the second function argument on the stack
and jumps back to let Steam do the rest for us :)
2017-09-24 23:20:43 +02:00

41 lines
1.0 KiB
C++

/*
Copyright 2016 Peter Repukat - FlatspotSoftware
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#pragma once
#include <stdint.h>
#include <Windows.h>
#include <psapi.h>
class EnforceBindings
{
public:
static void patchBytes();
static void Unpatch();
private:
static void PlaceJMP(BYTE * Address, DWORD jumpTo, DWORD lenght);
static void RestoreBytes(BYTE *Address, BYTE *original, DWORD lenght);
static MODULEINFO GetModInfo(char *szModule);
static DWORD FindPattern(char *module, const char *pattern, const char *mask);
static DWORD FindHookFunctionAdress();
};