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diff --git a/Userland/DevTools/UserspaceEmulator/SharedBufferRegion.h b/Userland/DevTools/UserspaceEmulator/SharedBufferRegion.h
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index 0000000000..b3c7d68d5c
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+++ b/Userland/DevTools/UserspaceEmulator/SharedBufferRegion.h
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+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include "SoftMMU.h"
+#include <sys/mman.h>
+
+namespace UserspaceEmulator {
+
+class SharedBufferRegion final : public Region {
+public:
+    static NonnullOwnPtr<SharedBufferRegion> create_with_shbuf_id(u32 base, u32 size, int shbuf_id, u8* shbuf_data);
+    virtual ~SharedBufferRegion() override;
+
+    virtual ValueWithShadow<u8> read8(u32 offset) override;
+    virtual ValueWithShadow<u16> read16(u32 offset) override;
+    virtual ValueWithShadow<u32> read32(u32 offset) override;
+    virtual ValueWithShadow<u64> read64(u32 offset) override;
+
+    virtual void write8(u32 offset, ValueWithShadow<u8>) override;
+    virtual void write16(u32 offset, ValueWithShadow<u16>) override;
+    virtual void write32(u32 offset, ValueWithShadow<u32>) override;
+    virtual void write64(u32 offset, ValueWithShadow<u64>) override;
+
+    virtual u8* data() override { return m_data; }
+    virtual u8* shadow_data() override { return m_shadow_data; }
+
+    int shbuf_id() const { return m_shbuf_id; }
+
+    int allow_all();
+    int allow_pid(pid_t);
+    int seal();
+    int release();
+    int set_volatile(bool);
+
+private:
+    SharedBufferRegion(u32 base, u32 size, int shbuf_id, u8* shbuf_data);
+
+    u8* m_data { nullptr };
+    u8* m_shadow_data { nullptr };
+    int m_shbuf_id { 0 };
+};
+
+}