feat: added native dispatcher + stub creation

src/impl/dispatcher.cpp

@@ -0,0 +1,43 @@
+#include <array>
+#include <cstdint>
+#include <Windows.h>
+
+#include <fxn/context.hpp>
+
+#include <detail/dispatcher.hpp>
+#include <detail/fxn.hpp>
+
+namespace fxn
+{
+    void NativeDispatcher(fxn::NativeContext* context, std::uint64_t nativeHash)
+    {
+
+    }
+
+    void* CreateNativeDispatcher(std::uint64_t nativeHash)
+    {
+        constexpr auto STUB_SIZE = 22;
+        constexpr auto STUB_BYTES = std::array<std::uint8_t, STUB_SIZE>
+        {
+            0x48, 0xB8,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rax, <NativeDispatcher_address>
+            0x48, 0xBA,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // mov rdx, <NativeHash>
+            0xFF, 0xE0                                      // jmp rax
+        };
+
+        auto stub = VirtualAllocEx(GetCurrentProcess(), nullptr, STUB_SIZE, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
+        if (!stub)
+        {
+            return nullptr;
+        }
+
+        auto stubBytes = STUB_BYTES;
+        auto dispatcherAddress = reinterpret_cast<std::uintptr_t>(&NativeDispatcher);
+        std::memcpy(&stubBytes[2], &dispatcherAddress, sizeof(std::uintptr_t));
+        std::memcpy(&stubBytes[12], &nativeHash, sizeof(std::uintptr_t));
+
+        std::memcpy(stub, stubBytes.data(), STUB_SIZE);
+        return stub;
+    }
+}