--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/debugger/bsd/x86/BsdX86CFrame.java	Sun Sep 25 16:03:29 2011 -0700
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package sun.jvm.hotspot.debugger.bsd.x86;
+
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.debugger.bsd.*;
+import sun.jvm.hotspot.debugger.cdbg.*;
+import sun.jvm.hotspot.debugger.cdbg.basic.*;
+
+final public class BsdX86CFrame extends BasicCFrame {
+   // package/class internals only
+   public BsdX86CFrame(BsdDebugger dbg, Address ebp, Address pc) {
+      super(dbg.getCDebugger());
+      this.ebp = ebp;
+      this.pc = pc;
+      this.dbg = dbg;
+   }
+
+   // override base class impl to avoid ELF parsing
+   public ClosestSymbol closestSymbolToPC() {
+      // try native lookup in debugger.
+      return dbg.lookup(dbg.getAddressValue(pc()));
+   }
+
+   public Address pc() {
+      return pc;
+   }
+
+   public Address localVariableBase() {
+      return ebp;
+   }
+
+   public CFrame sender() {
+      if (ebp == null) {
+        return null;
+      }
+
+      Address nextEBP = ebp.getAddressAt( 0 * ADDRESS_SIZE);
+      if (nextEBP == null) {
+        return null;
+      }
+      Address nextPC  = ebp.getAddressAt( 1 * ADDRESS_SIZE);
+      if (nextPC == null) {
+        return null;
+      }
+      return new BsdX86CFrame(dbg, nextEBP, nextPC);
+   }
+
+   private static final int ADDRESS_SIZE = 4;
+   private Address pc;
+   private Address ebp;
+   private BsdDebugger dbg;
+}