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+/*
+ * Copyright (c) 2017 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * 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;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * 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
+ * OWNER 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.
+ *
+ * Author: Brandon Potter
+ */
+
+#ifndef SRC_SIM_MEM_STATE_HH
+#define SRC_SIM_MEM_STATE_HH
+
+/**
+ * This class holds the memory state for the Process class and all of its
+ * derived, architecture-specific children.
+ *
+ * The fields held in this class dynamically change as the process object
+ * is run in the simulator. They are updated by system calls and faults;
+ * each change represents a modification to the process address space.
+ * The stack, heap, and mmap boundaries are held with this class along with
+ * the base of the next thread stack.
+ *
+ * The class is meant to be allocated dynamically and shared through a
+ * pointer interface because two process can potentially share their virtual
+ * address space if certain options are passed into the clone(2).
+ */
+class MemState
+{
+  public:
+    MemState(Addr brk_point, Addr stack_base, Addr max_stack_size,
+             Addr next_thread_stack_base, Addr mmap_end)
+        : _brkPoint(brk_point), _stackBase(stack_base), _stackSize(0),
+          _maxStackSize(max_stack_size), _stackMin(0),
+          _nextThreadStackBase(next_thread_stack_base), _mmapEnd(mmap_end)
+    { }
+
+    MemState&
+    operator=(const MemState &in)
+    {
+        if (this == &in)
+            return *this;
+
+        _brkPoint = in._brkPoint;
+        _stackBase = in._stackBase;
+        _stackSize = in._stackSize;
+        _maxStackSize = in._maxStackSize;
+        _stackMin = in._stackMin;
+        _nextThreadStackBase = in._nextThreadStackBase;
+        _mmapEnd = in._mmapEnd;
+        return *this;
+    }
+
+    Addr getBrkPoint() const { return _brkPoint; }
+    Addr getStackBase() const { return _stackBase; }
+    Addr getStackSize() const { return _stackSize; }
+    Addr getMaxStackSize() const { return _maxStackSize; }
+    Addr getStackMin() const { return _stackMin; }
+    Addr getNextThreadStackBase() const { return _nextThreadStackBase; }
+    Addr getMmapEnd() const { return _mmapEnd; }
+
+    void setBrkPoint(Addr brk_point) { _brkPoint = brk_point; }
+    void setStackBase(Addr stack_base) { _stackBase = stack_base; }
+    void setStackSize(Addr stack_size) { _stackSize = stack_size; }
+    void setMaxStackSize(Addr max_stack) { _maxStackSize = max_stack; }
+    void setStackMin(Addr stack_min) { _stackMin = stack_min; }
+    void setNextThreadStackBase(Addr ntsb) { _nextThreadStackBase = ntsb; }
+    void setMmapEnd(Addr mmap_end) { _mmapEnd = mmap_end; }
+
+  private:
+    Addr _brkPoint;
+    Addr _stackBase;
+    Addr _stackSize;
+    Addr _maxStackSize;
+    Addr _stackMin;
+    Addr _nextThreadStackBase;
+    Addr _mmapEnd;
+};
+
+#endif