diff --git a/src/windows-emulator/memory_permission_ext.cpp b/src/windows-emulator/memory_permission_ext.cpp
new file mode 100644
index 00000000..e69de29b
diff --git a/src/windows-emulator/memory_permission_ext.hpp b/src/windows-emulator/memory_permission_ext.hpp
new file mode 100644
index 00000000..ca410475
--- /dev/null
+++ b/src/windows-emulator/memory_permission_ext.hpp
@@ -0,0 +1,160 @@
+#pragma once
+#include "memory_permission.hpp"
+
+enum class memory_permission_ext : uint8_t
+{
+    none = 0,
+    guard = 1 << 0,
+};
+
+/*****************************************************************************
+ *
+ ****************************************************************************/
+
+constexpr memory_permission_ext operator&(const memory_permission_ext x, const memory_permission_ext y)
+{
+    return static_cast<memory_permission_ext>(static_cast<uint8_t>(x) & static_cast<uint8_t>(y));
+}
+
+constexpr memory_permission_ext operator|(const memory_permission_ext x, const memory_permission_ext y)
+{
+    return static_cast<memory_permission_ext>(static_cast<uint8_t>(x) | static_cast<uint8_t>(y));
+}
+
+constexpr memory_permission_ext operator^(const memory_permission_ext x, const memory_permission_ext y)
+{
+    return static_cast<memory_permission_ext>(static_cast<uint8_t>(x) ^ static_cast<uint8_t>(y));
+}
+
+constexpr memory_permission_ext operator~(memory_permission_ext x)
+{
+    return static_cast<memory_permission_ext>(~static_cast<uint8_t>(x));
+}
+
+inline memory_permission_ext& operator&=(memory_permission_ext& x, const memory_permission_ext y)
+{
+    x = x & y;
+    return x;
+}
+
+inline memory_permission_ext& operator|=(memory_permission_ext& x, const memory_permission_ext y)
+{
+    x = x | y;
+    return x;
+}
+
+inline memory_permission_ext& operator^=(memory_permission_ext& x, const memory_permission_ext y)
+{
+    x = x ^ y;
+    return x;
+}
+
+/*****************************************************************************
+ *
+ ****************************************************************************/
+
+struct nt_memory_permission 
+{
+    memory_permission common;  
+    memory_permission_ext extended;
+
+    constexpr nt_memory_permission() : common(memory_permission::none), extended(memory_permission_ext::none) {}
+    constexpr nt_memory_permission(memory_permission common) : common(common), extended(memory_permission_ext::none) {}
+    constexpr nt_memory_permission(memory_permission common, memory_permission_ext ext) : common(common), extended(ext) {}
+
+    // Implicit coercions
+    operator memory_permission() const { return common; }
+    operator memory_permission_ext() const { return extended; }
+
+    // This just does memberwise equality on each of the members in declaration order
+    bool operator==(nt_memory_permission const&) const = default;
+
+    nt_memory_permission& operator=(memory_permission const& y) 
+    {
+        this->common = y;
+        return *this;
+    }
+
+    constexpr bool is_guarded() const {
+        return (this->extended & memory_permission_ext::guard) == memory_permission_ext::guard;
+    }
+};
+
+/*****************************************************************************
+ *
+ ****************************************************************************/
+
+constexpr nt_memory_permission operator&(const nt_memory_permission x, const memory_permission y)
+{
+    return nt_memory_permission { x.common & y,  x.extended };
+}
+
+constexpr nt_memory_permission operator&(const nt_memory_permission x, const memory_permission_ext y)
+{
+    return nt_memory_permission { x.common,  x.extended & y };
+}
+
+constexpr nt_memory_permission operator|(const nt_memory_permission x, const memory_permission y)
+{
+    return nt_memory_permission { x.common | y, x.extended };
+}
+
+constexpr nt_memory_permission operator|(const nt_memory_permission x, const memory_permission_ext y)
+{
+    return nt_memory_permission { x.common, x.extended | y };
+}
+
+constexpr nt_memory_permission operator^(const nt_memory_permission x, const memory_permission y)
+{
+    return nt_memory_permission { x.common ^ y, x.extended };
+}
+
+constexpr nt_memory_permission operator^(const nt_memory_permission x, const memory_permission_ext y)
+{
+    return nt_memory_permission { x.common, x.extended ^ y };
+}
+
+inline nt_memory_permission& operator&=(nt_memory_permission& x, const memory_permission y)
+{
+    x = x & y;
+    return x;
+}
+
+inline nt_memory_permission& operator&=(nt_memory_permission& x, const memory_permission_ext y)
+{
+    x = x & y;
+    return x;
+}
+
+inline nt_memory_permission& operator|=(nt_memory_permission& x, const memory_permission y)
+{
+    x.common | y;
+    return x;
+}
+
+inline nt_memory_permission& operator|=(nt_memory_permission& x, const nt_memory_permission y)
+{
+    x.extended | y;
+    return x;
+}
+
+inline nt_memory_permission& operator^=(nt_memory_permission& x, const memory_permission y)
+{
+    x.common ^ y;
+    return x;
+}
+
+inline nt_memory_permission& operator^=(nt_memory_permission& x, const nt_memory_permission y)
+{
+    x.extended ^ y;
+    return x;
+}
+
+/*****************************************************************************
+ *
+ ****************************************************************************/
+
+inline bool is_guarded(const memory_permission_ext permission)
+{
+    return (permission & memory_permission_ext::guard) != memory_permission_ext::none;
+}