implement communication with emulator for virtual addresses

GUI/host/hookcode.cpp

@@ -88,7 +88,7 @@ namespace
 		}
 		HCode.erase(0, 1);
 
-		if ((hp.type & USING_STRING))
+		if (hp.type & USING_STRING)
 		{
 			if (HCode[0] == L'F')
 			{
@@ -247,7 +247,7 @@ namespace
 		if (hp.type & SPLIT_INDIRECT) HCode += L'*' + HexString(hp.split_index);
 
 		// Attempt to make the address relative
-		if (processId && !(hp.type & MODULE_OFFSET))
+		if (processId && !(hp.type & (MODULE_OFFSET | VIRTUALIZED)))
 			if (AutoHandle<> process = OpenProcess(PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, FALSE, processId))
 				if (MEMORY_BASIC_INFORMATION info = {}; VirtualQueryEx(process, (LPCVOID)hp.address, &info, sizeof(info)))
 					if (auto moduleName = GetModuleFilename(processId, (HMODULE)info.AllocationBase))

include/const.h

@@ -31,4 +31,5 @@ enum HookParamType : unsigned
 	HOOK_ENGINE = 0x8000,
 	HOOK_ADDITIONAL = 0x10000,
 	KNOWN_UNSTABLE = 0x20000,
+	VIRTUALIZED = 0x40000,
 };

texthook/hookfinder.cc

@@ -241,7 +241,8 @@ void SearchForHooks(SearchParam spUser)
 			HookParam hp = {};
 			hp.offset = records[i].offset;
 			hp.type = USING_UNICODE | USING_STRING;
-			hp.address = records[i].address;
+			if (devirtualizeAddress && (hp.address = devirtualizeAddress((void*)records[i].address))) hp.type |= VIRTUALIZED;
+			else hp.address = records[i].address;
 			hp.padding = records[i].padding;
 			hp.codepage = sp.codepage;
 			if (sp.hookPostProcessor) sp.hookPostProcessor(hp);

texthook/main.cc

@@ -13,6 +13,8 @@
 extern const char* PIPE_CONNECTED;
 extern const char* INSERTING_HOOK;
 extern const char* REMOVING_HOOK;
+extern const char* FUNC_MISSING;
+extern const char* MODULE_MISSING;
 extern const char* HOOK_FAILED;
 extern const char* TOO_MANY_HOOKS;
 
@@ -132,6 +134,16 @@ BOOL WINAPI DllMain(HINSTANCE hModule, DWORD fdwReason, LPVOID)
 
 		MH_Initialize();
 
+		if (HMODULE addressVirtualizer = GetModuleHandleW(L"hooker.dll"))
+		{
+			static auto virtualizeAddress = GetProcAddress(addressVirtualizer, "virtualize_address"), devirtualizeAddress = GetProcAddress(addressVirtualizer, "devirtualize_address");
+			if (virtualizeAddress && devirtualizeAddress)
+			{
+				::virtualizeAddress = [](uint32_t virtualAddress) { return std::unique_ptr<void*[], Functor<UniversalFree>>(((void** (*)(uint32_t))virtualizeAddress)(virtualAddress)); };
+				::devirtualizeAddress = (uint32_t(*)(void*))devirtualizeAddress;
+			}
+		}
+
 		CloseHandle(CreateThread(nullptr, 0, Pipe, nullptr, 0, nullptr)); // Using std::thread here = deadlock
 	} 
 	break;
@@ -145,19 +157,36 @@ BOOL WINAPI DllMain(HINSTANCE hModule, DWORD fdwReason, LPVOID)
 	return TRUE;
 }
 
-void NewHook(HookParam hp, LPCSTR lpname, DWORD flag)
+void NewHookImpl(HookParam hp, uint64_t address, void* realAddress, LPCSTR lpname, DWORD flag)
 {
 	if (++currentHook >= MAX_HOOK) return ConsoleOutput(TOO_MANY_HOOKS);
 	if (lpname && *lpname) strncpy_s(hp.name, lpname, HOOK_NAME_SIZE - 1);
 	ConsoleOutput(INSERTING_HOOK, hp.name);
 	RemoveHook(hp.address, 0);
-	if (!(*hooks)[currentHook].Insert(hp, flag))
+	if (!(*hooks)[currentHook].Insert(hp, address, realAddress, flag))
 	{
 		ConsoleOutput(HOOK_FAILED);
 		(*hooks)[currentHook].Clear();
 	}
 }
 
+void NewHook(HookParam hp, LPCSTR lpname, DWORD flag)
+{
+	auto address = hp.address;
+	if (hp.type & MODULE_OFFSET)  // Map hook offset to real address
+		if (hp.type & FUNCTION_OFFSET)
+			if (FARPROC function = GetProcAddress(GetModuleHandleW(hp.module), hp.function)) address += (uint64_t)function;
+			else return ConsoleOutput(FUNC_MISSING);
+		else if (HMODULE moduleBase = GetModuleHandleW(hp.module)) address += (uint64_t)moduleBase;
+		else return ConsoleOutput(MODULE_MISSING);
+	if (auto realAddresses = virtualizeAddress && address < UINT32_MAX ? virtualizeAddress(address) : nullptr)
+	{
+		hp.type |= VIRTUALIZED;
+		for (int i = 0; realAddresses[i]; ++i) NewHookImpl(hp, address, realAddresses[i], lpname, flag);
+	}
+	else NewHookImpl(hp, address, (void*)address, lpname, flag);
+}
+
 void RemoveHook(uint64_t addr, int maxOffset)
 {
 	for (auto& hook : *hooks) if (abs((long long)(hook.address - addr)) <= maxOffset) return hook.Clear();

texthook/main.h

@@ -15,6 +15,10 @@ void RemoveHook(uint64_t addr, int maxOffset = 9);
 
 inline SearchParam spDefault;
 
+inline void UniversalFree(LPVOID address) { HeapFree(GetProcessHeap(), 0, address); }
+inline std::unique_ptr<void*[], Functor<UniversalFree>>(*virtualizeAddress)(uint32_t virtualAddress) = nullptr;
+inline uint32_t(*devirtualizeAddress)(void* realAddress) = nullptr;
+
 extern "C" // minhook library
 {
 	enum MH_STATUS

texthook/texthook.cc

@@ -7,8 +7,6 @@
 #include "main.h"
 #include "ithsys/ithsys.h"
 
-extern const char* FUNC_MISSING;
-extern const char* MODULE_MISSING;
 extern const char* GARBAGE_MEMORY;
 extern const char* SEND_ERROR;
 extern const char* READ_ERROR;
@@ -98,14 +96,15 @@ namespace { // unnamed
 
 // - TextHook methods -
 
-bool TextHook::Insert(HookParam hp, DWORD set_flag)
+bool TextHook::Insert(HookParam hp, uint64_t address, void* realAddress, DWORD set_flag)
 {
 	{
 		std::scoped_lock lock(viewMutex);
 		hp.type |= set_flag;
 		if (hp.type & USING_UTF8) hp.codepage = CP_UTF8;
 		this->hp = hp;
-		address = hp.address;
+		this->address = address;
+		this->location = realAddress;
 	}
 	if (hp.type & DIRECT_READ) return InsertReadCode();
 	return InsertHookCode();
@@ -209,13 +208,6 @@ bool TextHook::InsertHookCode()
 {
 	// jichi 9/17/2013: might raise 0xC0000005 AccessViolationException on win7
 	// Artikash 10/30/2018: No, I think that's impossible now that I moved to minhook
-	if (hp.type & MODULE_OFFSET)  // Map hook offset to real address
-		if (hp.type & FUNCTION_OFFSET)
-			if (FARPROC function = GetProcAddress(GetModuleHandleW(hp.module), hp.function)) address += (uint64_t)function;
-			else return ConsoleOutput(FUNC_MISSING), false;
-		else if (HMODULE moduleBase = GetModuleHandleW(hp.module)) address += (uint64_t)moduleBase;
-		else return ConsoleOutput(MODULE_MISSING), false;
-
 	VirtualProtect(location, 10, PAGE_EXECUTE_READWRITE, DUMMY);
 	void* original;
 	MH_STATUS error;

texthook/texthook.h

@@ -25,13 +25,9 @@ class TextHook
 {
 public:
 	HookParam hp;
-	union
+	uint64_t address; // Absolute address
-	{
-		uint64_t address;
-		void* location;
-	}; // Absolute address
 
-	bool Insert(HookParam hp, DWORD set_flag);
+	bool Insert(HookParam hp, uint64_t address, void* realAddress, DWORD set_flag);
 	void Clear();
 
 private:
@@ -45,6 +41,7 @@ private:
 	void RemoveReadCode();
 
 	volatile DWORD useCount;
+	void* location;
 	HANDLE readerThread, readerEvent;
 	bool err;
 	BYTE trampoline[x64 ? 140 : 40];