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diff --git a/src/os/aix/vm/loadlib_aix.hpp b/src/os/aix/vm/loadlib_aix.hpp
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+/*
+ * Copyright 2012, 2013 SAP AG. 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.
+ *
+ */
+
+
+// Loadlib_aix.cpp contains support code for analysing the memory
+// layout of loaded binaries in ones own process space.
+//
+// It is needed, among other things, to provide a  dladdr() emulation, because
+// that one is not provided by AIX
+
+#ifndef OS_AIX_VM_LOADLIB_AIX_HPP
+#define OS_AIX_VM_LOADLIB_AIX_HPP
+
+class outputStream;
+
+// This class holds information about a single loaded library module.
+// Note that on AIX, a single library can be spread over multiple
+// uintptr_t range on a module base, eg.
+// libC.a(shr3_64.o) or libC.a(shrcore_64.o).
+class LoadedLibraryModule {
+
+    friend class LoadedLibraries;
+
+    char fullpath[512];  // eg /usr/lib/libC.a
+    char shortname[30];  // eg libC.a
+    char membername[30]; // eg shrcore_64.o
+    const unsigned char* text_from;
+    const unsigned char* text_to;
+    const unsigned char* data_from;
+    const unsigned char* data_to;
+
+  public:
+
+    const char* get_fullpath() const {
+      return fullpath;
+    }
+    const char* get_shortname() const {
+      return shortname;
+    }
+    const char* get_membername() const {
+      return membername;
+    }
+
+    // text_from, text_to: returns the range of the text (code)
+    // segment for that module
+    const unsigned char* get_text_from() const {
+      return text_from;
+    }
+    const unsigned char* get_text_to() const {
+      return text_to;
+    }
+
+    // data_from/data_to: returns the range of the data
+    // segment for that module
+    const unsigned char* get_data_from() const {
+      return data_from;
+    }
+    const unsigned char* get_data_to() const {
+      return data_to;
+    }
+
+    // returns true if the
+    bool is_in_text(const unsigned char* p) const {
+      return p >= text_from && p < text_to ? true : false;
+    }
+
+    bool is_in_data(const unsigned char* p) const {
+      return p >= data_from && p < data_to ? true : false;
+    }
+
+    // output debug info
+    void print(outputStream* os) const;
+
+}; // end LoadedLibraryModule
+
+// This class is a singleton holding a map of all loaded binaries
+// in the AIX process space.
+class LoadedLibraries
+// : AllStatic (including allocation.hpp just for AllStatic is overkill.)
+{
+
+  private:
+
+    enum {MAX_MODULES = 100};
+    static LoadedLibraryModule tab[MAX_MODULES];
+    static int num_loaded;
+
+  public:
+
+    // rebuild the internal table of LoadedLibraryModule objects
+    static void reload();
+
+    // checks whether the address p points to any of the loaded code segments.
+    // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
+    static const LoadedLibraryModule* find_for_text_address(const  unsigned char* p);
+
+    // checks whether the address p points to any of the loaded data segments.
+    // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
+    static const LoadedLibraryModule* find_for_data_address(const  unsigned char* p);
+
+    // output debug info
+    static void print(outputStream* os);
+
+}; // end LoadedLibraries
+
+
+#endif // OS_AIX_VM_LOADLIB_AIX_HPP