--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/gov/nasa/jpf/jvm/JVMNativeStackFrame.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+
+package gov.nasa.jpf.jvm;
+
+import gov.nasa.jpf.vm.NativeMethodInfo;
+import gov.nasa.jpf.vm.NativeStackFrame;
+import gov.nasa.jpf.vm.StackFrame;
+import gov.nasa.jpf.vm.ThreadInfo;
+import gov.nasa.jpf.vm.Types;
+
+/**
+ * a NativeStackFrame used for calling NativeMethods from Java bytecode
+ */
+public class JVMNativeStackFrame extends NativeStackFrame {
+
+  public JVMNativeStackFrame (NativeMethodInfo callee){
+    super(callee);
+  }
+  
+  public void setArguments (ThreadInfo ti){
+    StackFrame callerFrame = ti.getTopFrame(); // we are not going to modify it
+    NativeMethodInfo nmi = (NativeMethodInfo) mi;
+    int      nArgs = nmi.getNumberOfArguments();
+    byte[]   argTypes = nmi.getArgumentTypes();
+
+    Object[] a = new Object[nArgs+2];
+
+    int      stackOffset;
+    int      i, j, k;
+    int      ival;
+    long     lval;
+
+    for (i = 0, stackOffset = 0, j = nArgs + 1, k = nArgs - 1;
+         i < nArgs;
+         i++, j--, k--) {
+      switch (argTypes[k]) {
+      case Types.T_BOOLEAN:
+        ival = callerFrame.peek(stackOffset);
+        a[j] = Boolean.valueOf(Types.intToBoolean(ival));
+
+        break;
+
+      case Types.T_BYTE:
+        ival = callerFrame.peek(stackOffset);
+        a[j] = Byte.valueOf((byte) ival);
+
+        break;
+
+      case Types.T_CHAR:
+        ival = callerFrame.peek(stackOffset);
+        a[j] = Character.valueOf((char) ival);
+
+        break;
+
+      case Types.T_SHORT:
+        ival = callerFrame.peek(stackOffset);
+        a[j] = new Short((short) ival);
+
+        break;
+
+      case Types.T_INT:
+        ival = callerFrame.peek(stackOffset);
+        a[j] = new Integer(ival);
+
+        break;
+
+      case Types.T_LONG:
+        lval = callerFrame.peekLong(stackOffset);
+        stackOffset++; // 2 stack words
+        a[j] = new Long(lval);
+
+        break;
+
+      case Types.T_FLOAT:
+        ival = callerFrame.peek(stackOffset);
+        a[j] = new Float(Types.intToFloat(ival));
+
+        break;
+
+      case Types.T_DOUBLE:
+        lval = callerFrame.peekLong(stackOffset);
+        stackOffset++; // 2 stack words
+        a[j] = new Double(Types.longToDouble(lval));
+
+        break;
+
+      default:
+        // NOTE - we have to store T_REFERENCE as an Integer, because
+        // it shows up in our native method as an 'int'
+        ival = callerFrame.peek(stackOffset);
+        a[j] = new Integer(ival);
+      }
+
+      stackOffset++;
+    }
+
+    //--- set  our standard MJI header arguments
+    a[0] = ti.getMJIEnv();
+    
+    if (nmi.isStatic()) {
+      a[1] = new Integer( nmi.getClassInfo().getClassObjectRef());
+    } else {
+      int thisRef = callerFrame.getCalleeThis(nmi);
+      a[1] = new Integer( thisRef);
+      
+      setThis(thisRef);
+    }
+
+    setArgs(a);
+  }
+}