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diff --git a/util/statetrace/arch/tracechild_arm.hh b/util/statetrace/arch/tracechild_arm.hh
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+++ b/util/statetrace/arch/tracechild_arm.hh
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+/*
+ * Copyright (c) 2009 The Regents of The University of Michigan
+ * 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.
+ *
+ * Authors: Ali Saidi
+ *          Gabe Black
+ */
+
+#ifndef TRACECHILD_ARM_HH
+#define TRACECHILD_ARM_HH
+
+#include <cassert>
+#include <string>
+#include <sys/user.h>
+#include <sys/ptrace.h>
+#include "tracechild.hh"
+
+
+class ARMTraceChild : public TraceChild
+{
+  public:
+    enum RegNum
+    {
+        // r0 - r3 argument, temp, caller save
+        // r4 - r10 callee save
+        // r11 - FP
+        // r12 - temp
+        // r13 - stack
+        // r14 - link
+        // r15 - pc
+        R0, R1, R2, R3, R4, R5, R6, R7,
+        R8, R9, R10, FP, R12, SP, LR, PC,
+        CPSR,
+        numregs
+    };
+  private:
+    char printBuffer[256];
+    static const char *regNames[numregs];
+    uint32_t getRegs(user_regs& myregs, int num);
+    user_regs regs;
+    user_regs oldregs;
+    bool regDiffSinceUpdate[numregs];
+    
+  protected:
+    bool update(int pid);
+  
+  public:
+    ARMTraceChild();
+    bool sendState(int socket);
+
+    int getNumRegs() 
+    {
+        return numregs;
+    }
+
+    bool diffSinceUpdate(int num)
+    {
+        assert(num < numregs && num >= 0);
+        return regDiffSinceUpdate[num];
+    }
+
+    std::string getRegName(int num)
+    {
+        assert(num < numregs && num >= 0);
+        return regNames[num];
+    }
+
+    int64_t getRegVal(int num);
+    int64_t getOldRegVal(int num);
+  
+    bool step();
+
+    uint64_t getPC()
+    {
+            return getRegVal(PC);
+    }
+
+    uint64_t getSP()
+    {
+            return getRegVal(SP);
+    }
+
+    char * printReg(int num);
+
+    std::ostream & outputStartState(std::ostream & os);
+
+};
+
+#endif
+