108 lines
2.7 KiB
C++
108 lines
2.7 KiB
C++
#include "skse64_common/skse_version.h"
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#include "skse64_common/Utilities.h"
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#include "skse64_common/SafeWrite.h"
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#include "skse64_loader_common/IdentifyEXE.h"
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#include <shlobj.h>
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#include <intrin.h>
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#include <string>
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IDebugLog gLog;
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HANDLE g_dllHandle;
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static void OnAttach(void);
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static void HookMain(void * retAddr);
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static void HookIAT();
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BOOL WINAPI DllMain(HANDLE procHandle, DWORD reason, LPVOID reserved)
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{
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if(reason == DLL_PROCESS_ATTACH)
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{
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g_dllHandle = procHandle;
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OnAttach();
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}
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return TRUE;
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}
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static void OnAttach(void)
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{
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gLog.OpenRelative(CSIDL_MYDOCUMENTS, "\\My Games\\Skyrim Special Edition\\SKSE\\skse64_steam_loader.log");
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gLog.SetPrintLevel(IDebugLog::kLevel_Error);
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gLog.SetLogLevel(IDebugLog::kLevel_DebugMessage);
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FILETIME now;
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GetSystemTimeAsFileTime(&now);
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_MESSAGE("skse64 loader %08X (steam) %08X%08X %s", PACKED_SKSE_VERSION, now.dwHighDateTime, now.dwLowDateTime, GetOSInfoStr().c_str());
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_MESSAGE("loader base addr = %016I64X", g_dllHandle);
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_MESSAGE("exe base addr = %016I64X", GetModuleHandle(NULL));
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// hook an imported function early so we can inject our code
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HookIAT();
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}
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typedef void (* ___telemetry_main_invoke_trigger)(void * arg);
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___telemetry_main_invoke_trigger __telemetry_main_invoke_trigger_Original = NULL;
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static void __telemetry_main_invoke_trigger_Hook(void * arg)
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{
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HookMain(_ReturnAddress());
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__telemetry_main_invoke_trigger_Original(arg);
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}
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static void HookIAT()
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{
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___telemetry_main_invoke_trigger * iat = (___telemetry_main_invoke_trigger *)GetIATAddr(GetModuleHandle(NULL), "VCRUNTIME140.dll", "__telemetry_main_invoke_trigger");
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if(iat)
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{
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_MESSAGE("found iat at %016I64X", iat);
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__telemetry_main_invoke_trigger_Original = *iat;
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_MESSAGE("original thunk %016I64X", __telemetry_main_invoke_trigger_Original);
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SafeWrite64(uintptr_t(iat), (UInt64)__telemetry_main_invoke_trigger_Hook);
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_MESSAGE("patched iat");
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}
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else
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{
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_MESSAGE("couldn't find __telemetry_main_invoke_trigger");
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}
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}
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bool hookInstalled = false;
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std::string g_dllPath;
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static void HookMain(void * retAddr)
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{
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if(hookInstalled)
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return;
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else
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hookInstalled = true;
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_MESSAGE("HookMain: thread = %d retaddr = %016I64X", GetCurrentThreadId(), retAddr);
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std::string runtimePath = GetRuntimePath();
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_MESSAGE("runtimePath = %s", runtimePath.c_str());
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bool isEditor = false;
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// check version etc
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std::string dllSuffix;
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ProcHookInfo procHookInfo;
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if(!IdentifyEXE(runtimePath.c_str(), isEditor, &dllSuffix, &procHookInfo))
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{
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_ERROR("unknown exe");
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return;
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}
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const char * dllPrefix = (isEditor == false) ? "\\skse64_" : "\\skse64_editor_";
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g_dllPath = GetRuntimeDirectory() + dllPrefix + dllSuffix + ".dll";
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_MESSAGE("dll = %s", g_dllPath.c_str());
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LoadLibrary(g_dllPath.c_str());
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}
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