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/* Copyright (C) 2005-2011, Thorvald Natvig <thorvald@natvig.com>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
- Neither the name of the Mumble Developers nor the names of its
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef MUMBLE_HARDHOOK_X86_H_
#define MUMBLE_HARDHOOK_X86_H_
#define _UNICODE
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif
#include <stdio.h>
#include <stdarg.h>
#include <ctype.h>
#include <windows.h>
#include <math.h>
#include <map>
#include <vector>
#include <string>
typedef void *(*voidFunc)();
struct HardHook {
// Pointer to executable code page that holds all trampoline codes
static void *pCode;
// Number of bytes used in pCode.
static unsigned int uiCode;
// Pointer to original code (which is hooked/replaced)
unsigned char *baseptr;
// The original instructions that are replaced by the hook
unsigned char orig[6];
// Hook-Code; Replacement instructions for function call jump
unsigned char replace[6];
// Remembers whether there is a trampoline in place in the target code or
// whether restore -> call orig. -> replace has to be used for every intercepted call
bool bTrampoline;
// Points to the (rest of the) original function when used from the injected function
voidFunc call;
HardHook();
HardHook(voidFunc func, voidFunc replacement);
void setup(voidFunc func, voidFunc replacement);
void setupInterface(IUnknown *intf, LONG funcoffset, voidFunc replacement);
void reset();
void inject(bool force = false);
void restore(bool force = false);
void print();
void check();
private:
static const int CODEREPLACESIZE;
static const int CODEPROTECTSIZE;
void *cloneCode(void **orig);
};
#endif
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