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diff --git a/nuttx/binfmt/libnxflat/libnxflat.h b/nuttx/binfmt/libnxflat/libnxflat.h
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+++ b/nuttx/binfmt/libnxflat/libnxflat.h
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+/****************************************************************************
+ * binfmt/libnxflat/libnxflat.h
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name NuttX 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.
+ *
+ ****************************************************************************/
+
+#ifndef __BINFMT_LIBNXFLAT_LIBNXFLAT_H
+#define __BINFMT_LIBNXFLAT_LIBNXFLAT_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/binfmt/nxflat.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxflat_addrenv_alloc
+ *
+ * Description:
+ *   Allocate memory for the ELF image (elfalloc). If CONFIG_ADDRENV=n,
+ *   elfalloc will be allocated using kzalloc().  If CONFIG_ADDRENV-y, then
+ *   elfalloc will be allocated using up_addrenv_create().  In either case,
+ *   there will be a unique instance of elfalloc (and stack) for each
+ *   instance of a process.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *   envsize - The size (in bytes) of the address environment needed for the
+ *     ELF image.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int nxflat_addrenv_alloc(FAR struct nxflat_loadinfo_s *loadinfo, size_t envsize);
+
+/****************************************************************************
+ * Name: nxflat_addrenv_select
+ *
+ * Description:
+ *   Temporarity select the task's address environemnt.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ADDRENV
+#  define nxflat_addrenv_select(l) up_addrenv_select((l)->addrenv, &(l)->oldenv)
+#endif
+
+/****************************************************************************
+ * Name: nxflat_addrenv_restore
+ *
+ * Description:
+ *   Restore the address environment before nxflat_addrenv_select() was called..
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ADDRENV
+#  define nxflat_addrenv_restore(l) up_addrenv_restore((l)->oldenv)
+#endif
+
+/****************************************************************************
+ * Name: nxflat_addrenv_free
+ *
+ * Description:
+ *   Release the address environment previously created by
+ *   nxflat_addrenv_create().  This function  is called only under certain
+ *   error conditions after the the module has been loaded but not yet
+ *   started. After the module has been started, the address environment
+ *   will automatically be freed when the module exits.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *
+ * Returned Value:
+ *   None.
+ *
+ ****************************************************************************/
+
+void nxflat_addrenv_free(FAR struct nxflat_loadinfo_s *loadinfo);
+
+#endif /* __BINFMT_LIBNXFLAT_LIBNXFLAT_H */