Adds extra hop on proxy method on debug builds, resolves #1

Resolves issue on x64 proxy dll builds on debug mode, and now returns NULL on setup() if loading the proxied DLL is not successful.

Author: itisluiz

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.21)
-project("dllforward" VERSION 1.2.1.1 LANGUAGES CXX)
+project("dllforward" VERSION 1.2.1.2 LANGUAGES CXX)
 
 ## Project's base, containing all that's to be inherited
 set(PROJECT_BASE ${PROJECT_NAME}-base)

include/headerboilerplate/bottom.inl

@@ -3,6 +3,9 @@ static HMODULE setup()
 {
 	HMODULE hProxiedDLL{ LoadLibraryA(internal::proxiedDll) };
 
+	if (!hProxiedDLL)
+		return NULL;
+
 	for (const internal::Export& exportEntry : internal::exports)
 	{
 		// uintptr_t pProxiedMethod{ reinterpret_cast<uintptr_t>(hProxiedDLL) + exportEntry.rva };
@@ -11,6 +14,14 @@ static HMODULE setup()
 
 		uintptr_t pProxyMethod{ reinterpret_cast<uintptr_t>(exportEntry.method) };
 
+#ifdef _DEBUG
+		if (*reinterpret_cast<uint8_t*>(pProxyMethod) == 0xE9)
+		{
+			int32_t offset{ *reinterpret_cast<int32_t*>(pProxyMethod + 1) };
+			pProxyMethod += offset + 5;
+		}
+#endif
+
 #ifdef _WIN64
 		uint8_t opcodes[14]{ 0xFF, 0x25, 0x00, 0x00, 0x00, 0x00 };
 		*reinterpret_cast<uintptr_t*>(opcodes + 6) = pProxiedMethod;