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diff --git a/nuttx/binfmt/libelf/libelf.h b/nuttx/binfmt/libelf/libelf.h
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+++ b/nuttx/binfmt/libelf/libelf.h
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+/****************************************************************************
+ * binfmt/libelf/libelf.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_LIBELF_LIBELF_H
+#define __BINFMT_LIBELF_LIBELF_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <elf32.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/binfmt/elf.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: elf_verifyheader
+ *
+ * Description:
+ *   Given the header from a possible ELF executable, verify that it is
+ *   an ELF executable.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_verifyheader(FAR const Elf32_Ehdr *header);
+
+/****************************************************************************
+ * Name: elf_read
+ *
+ * Description:
+ *   Read 'readsize' bytes from the object file at 'offset'.  The data is
+ *   read into 'buffer.' If 'buffer' is part of the ELF address environment,
+ *   then the caller is responsibile for assuring that that address
+ *   environment is in place before calling this function (i.e., that
+ *   elf_addrenv_select() has been called if CONFIG_ADDRENV=y).
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_read(FAR struct elf_loadinfo_s *loadinfo, FAR uint8_t *buffer,
+             size_t readsize, off_t offset);
+
+/****************************************************************************
+ * Name: elf_loadshdrs
+ *
+ * Description:
+ *   Loads section headers into memory.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_loadshdrs(FAR struct elf_loadinfo_s *loadinfo);
+
+/****************************************************************************
+ * Name: elf_findsection
+ *
+ * Description:
+ *   A section by its name.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *   sectname - Name of the section to find
+ *
+ * Returned Value:
+ *   On success, the index to the section is returned; A negated errno value
+ *   is returned on failure.
+ *
+ ****************************************************************************/
+
+int elf_findsection(FAR struct elf_loadinfo_s *loadinfo,
+                    FAR const char *sectname);
+
+/****************************************************************************
+ * Name: elf_findsymtab
+ *
+ * Description:
+ *   Find the symbol table section.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_findsymtab(FAR struct elf_loadinfo_s *loadinfo);
+
+/****************************************************************************
+ * Name: elf_readsym
+ *
+ * Description:
+ *   Read the ELFT symbol structure at the specfied index into memory.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *   index    - Symbol table index
+ *   sym      - Location to return the table entry
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_readsym(FAR struct elf_loadinfo_s *loadinfo, int index,
+                FAR Elf32_Sym *sym);
+
+/****************************************************************************
+ * Name: elf_symvalue
+ *
+ * Description:
+ *   Get the value of a symbol.  The updated value of the symbol is returned
+ *   in the st_value field of the symbol table entry.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *   sym      - Symbol table entry (value might be undefined)
+ *   exports  - The symbol table to use for resolving undefined symbols.
+ *   nexports - Number of symbols in the symbol table.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_symvalue(FAR struct elf_loadinfo_s *loadinfo, FAR Elf32_Sym *sym,
+                 FAR const struct symtab_s *exports, int nexports);
+
+/****************************************************************************
+ * Name: elf_freebuffers
+ *
+ * Description:
+ *  Release all working buffers.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_freebuffers(FAR struct elf_loadinfo_s *loadinfo);
+
+/****************************************************************************
+ * Name: elf_allocbuffer
+ *
+ * Description:
+ *   Perform the initial allocation of the I/O buffer, if it has not already
+ *   been allocated.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_allocbuffer(FAR struct elf_loadinfo_s *loadinfo);
+
+/****************************************************************************
+ * Name: elf_reallocbuffer
+ *
+ * Description:
+ *   Increase the size of I/O buffer by the specified buffer increment.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_reallocbuffer(FAR struct elf_loadinfo_s *loadinfo, size_t increment);
+
+/****************************************************************************
+ * Name: elf_findctors
+ *
+ * Description:
+ *   Find C++ static constructors.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BINFMT_CONSTRUCTORS
+int elf_loadctors(FAR struct elf_loadinfo_s *loadinfo);
+#endif
+
+/****************************************************************************
+ * Name: elf_loaddtors
+ *
+ * Description:
+ *  Load pointers to static destructors into an in-memory array.
+ *
+ * Input Parameters:
+ *   loadinfo - Load state information
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BINFMT_CONSTRUCTORS
+int elf_loaddtors(FAR struct elf_loadinfo_s *loadinfo);
+#endif
+
+/****************************************************************************
+ * Name: elf_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 elf_addrenv_alloc(FAR struct elf_loadinfo_s *loadinfo, size_t envsize);
+
+/****************************************************************************
+ * Name: elf_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 elf_addrenv_select(l) up_addrenv_select((l)->addrenv, &(l)->oldenv)
+#endif
+
+/****************************************************************************
+ * Name: elf_addrenv_restore
+ *
+ * Description:
+ *   Restore the address environment before elf_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 elf_addrenv_restore(l) up_addrenv_restore((l)->oldenv)
+#endif
+
+/****************************************************************************
+ * Name: elf_addrenv_free
+ *
+ * Description:
+ *   Release the address environment previously created by
+ *   elf_addrenv_alloc().  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 elf_addrenv_free(FAR struct elf_loadinfo_s *loadinfo);
+
+#endif /* __BINFMT_LIBELF_LIBELF_H */