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#pragma once
#define WRAPPER __declspec(naked)
#define DEPRECATED __declspec(deprecated)
#define EAXJMP(a) { _asm mov eax, a _asm jmp eax }
#define VARJMP(a) { _asm jmp a }
#define WRAPARG(a) UNREFERENCED_PARAMETER(a)
#define NOVMT __declspec(novtable)
#define SETVMT(a) *((DWORD_PTR*)this) = (DWORD_PTR)a
#include <algorithm>
#include <vector>
#include "common.h"
enum
{
PATCH_CALL,
PATCH_JUMP,
PATCH_NOTHING,
};
enum
{
III_10 = 1,
III_11,
III_STEAM,
VC_10,
VC_11,
VC_STEAM
};
extern int gtaversion;
class StaticPatcher
{
private:
using Patcher = void(*)();
Patcher m_func;
StaticPatcher *m_next;
static StaticPatcher *ms_head;
void Run() { m_func(); }
public:
StaticPatcher(Patcher func);
static void Apply();
};
template<typename T>
inline T AddressByVersion(uint32_t addressIII10, uint32_t addressIII11, uint32_t addressIIISteam, uint32_t addressvc10, uint32_t addressvc11, uint32_t addressvcSteam)
{
if(gtaversion == -1){
if(*(uint32_t*)0x5C1E75 == 0xB85548EC) gtaversion = III_10;
else if(*(uint32_t*)0x5C2135 == 0xB85548EC) gtaversion = III_11;
else if(*(uint32_t*)0x5C6FD5 == 0xB85548EC) gtaversion = III_STEAM;
else if(*(uint32_t*)0x667BF5 == 0xB85548EC) gtaversion = VC_10;
else if(*(uint32_t*)0x667C45 == 0xB85548EC) gtaversion = VC_11;
else if(*(uint32_t*)0x666BA5 == 0xB85548EC) gtaversion = VC_STEAM;
else gtaversion = 0;
}
switch(gtaversion){
case III_10:
return (T)addressIII10;
case III_11:
return (T)addressIII11;
case III_STEAM:
return (T)addressIIISteam;
case VC_10:
return (T)addressvc10;
case VC_11:
return (T)addressvc11;
case VC_STEAM:
return (T)addressvcSteam;
default:
return (T)0;
}
}
inline bool
is10(void)
{
return gtaversion == III_10 || gtaversion == VC_10;
}
inline bool
isIII(void)
{
return gtaversion >= III_10 && gtaversion <= III_STEAM;
}
inline bool
isVC(void)
{
return gtaversion >= VC_10 && gtaversion <= VC_STEAM;
}
#define PTRFROMCALL(addr) (uint32_t)(*(uint32_t*)((uint32_t)addr+1) + (uint32_t)addr + 5)
#define INTERCEPT(saved, func, a) \
{ \
saved = PTRFROMCALL(a); \
InjectHook(a, func); \
}
template<typename T, typename AT> inline void
Patch(AT address, T value)
{
DWORD dwProtect[2];
VirtualProtect((void*)address, sizeof(T), PAGE_EXECUTE_READWRITE, &dwProtect[0]);
*(T*)address = value;
VirtualProtect((void*)address, sizeof(T), dwProtect[0], &dwProtect[1]);
}
template<typename AT> inline void
Nop(AT address, unsigned int nCount)
{
DWORD dwProtect[2];
VirtualProtect((void*)address, nCount, PAGE_EXECUTE_READWRITE, &dwProtect[0]);
memset((void*)address, 0x90, nCount);
VirtualProtect((void*)address, nCount, dwProtect[0], &dwProtect[1]);
}
template<typename AT> inline void
ClearCC(AT address, unsigned int nCount)
{
DWORD dwProtect[2];
VirtualProtect((void*)address, nCount, PAGE_EXECUTE_READWRITE, &dwProtect[0]);
memset((void*)address, 0xCC, nCount);
VirtualProtect((void*)address, nCount, dwProtect[0], &dwProtect[1]);
}
extern std::vector<int32> usedAddresses;
template<typename AT, typename HT> inline void
InjectHook(AT address, HT hook, unsigned int nType=PATCH_NOTHING)
{
if(std::any_of(usedAddresses.begin(), usedAddresses.end(),
[address](AT value) { return (int32)value == address; })) {
debug("Used address %#06x twice when injecting hook\n", address);
}
usedAddresses.push_back((int32)address);
DWORD dwProtect[2];
switch ( nType )
{
case PATCH_JUMP:
VirtualProtect((void*)address, 5, PAGE_EXECUTE_READWRITE, &dwProtect[0]);
*(BYTE*)address = 0xE9;
break;
case PATCH_CALL:
VirtualProtect((void*)address, 5, PAGE_EXECUTE_READWRITE, &dwProtect[0]);
*(BYTE*)address = 0xE8;
break;
default:
VirtualProtect((void*)((DWORD)address + 1), 4, PAGE_EXECUTE_READWRITE, &dwProtect[0]);
break;
}
DWORD dwHook;
_asm
{
mov eax, hook
mov dwHook, eax
}
*(ptrdiff_t*)((DWORD)address + 1) = (DWORD)dwHook - (DWORD)address - 5;
if ( nType == PATCH_NOTHING )
VirtualProtect((void*)((DWORD)address + 1), 4, dwProtect[0], &dwProtect[1]);
else
VirtualProtect((void*)address, 5, dwProtect[0], &dwProtect[1]);
}
inline void ExtractCall(void *dst, uint32_t a)
{
*(uint32_t*)dst = (uint32_t)(*(uint32_t*)(a+1) + a + 5);
}
template<typename T>
inline void InterceptCall(void *dst, T func, uint32_t a)
{
ExtractCall(dst, a);
InjectHook(a, func);
}
template<typename T>
inline void InterceptVmethod(void *dst, T func, uint32_t a)
{
*(uint32_t*)dst = *(uint32_t*)a;
Patch(a, func);
}
#define STARTPATCHES static StaticPatcher Patcher([](){
#define ENDPATCHES });
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