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diff --git a/misc/buildroot/toolchain/nxflat/nxflat.h b/misc/buildroot/toolchain/nxflat/nxflat.h
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+/****************************************************************************
+ * toolchain/nxflat/nxflat.h
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 __TOOLCHAIN_NXFLAT_NXFLAT_H
+#define __TOOLCHAIN_NXFLAT_NXFLAT_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define NXFLAT_MAX_STRING_SIZE 64       /* Largest size of string (w/zterminator) */
+#define NXFLAT_MAGIC          "NxFT"    /* NXFLAT magic number */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * The NXFLAT file header
+ *
+ * The elements within this structure are stored in network order (i.e.,
+ * ntohs() and ntohl() should be used to access fields within the
+ * header.
+ ****************************************************************************/
+
+struct nxflat_hdr_s
+  {
+    /* The "magic number" identifying the file type.  This field should contain
+     * "NxFT". NOTE that there is no other versioning information other than
+     * this magic number. */
+
+    char h_magic[4];
+
+    /* The following fields provide the memory map for the nxflat binary.
+     * h_entry - Offset to the the first executable insruction from the
+     * beginning of the file. h_datastart - Offset to the beginning of the data 
+     * segment from the beginning of the file.  This field can also interpreted 
+     * as the size of the ISpace segment. h_dataend - Offset to the end of the
+     * data segment from the beginning of the file. h_bssend - Offset to the
+     * end of bss segment from the beginning of the file. The text segment can 
+     * be considered to be the contiguous (unrelocated) address space range
+     * from address zero through (but not including) h_datastart. The size of
+     * the data/bss segment includes (as a minimum) the data and bss regions
+     * (bss_end - data_start) as well as the size of the stack.  At run time,
+     * this region will also include program arguments and environement
+     * variables. The bss segment is data_end through bss_end. */
+
+    u_int32_t h_entry;
+    u_int32_t h_datastart;
+    u_int32_t h_dataend;
+    u_int32_t h_bssend;
+
+    /* Size of stack, in bytes */
+
+    u_int32_t h_stacksize;
+
+    /* Relocation entries h_relocstart - Offset to the beginning of an array of 
+     * relocation records (struct nxflat_reloc).  The offset is relative to the 
+     * start of the file h_reloccount - The number of relocation records in the 
+     * arry */
+
+    u_int32_t h_relocstart;     /* Offset of relocation records */
+    u_int32_t h_reloccount;     /* Number of relocation records */
+
+    /* Imported symbol table (NOTE no symbols are exported) h_importsymbols -
+     * Offset to the beginning of an array of imported symbol structures
+     * (struct nxflat_import).  The h_importsymbols offset is relative to the
+     * beginning of the file.  Each entry of the array contains an u_int32_t
+     * offset (again from the beginning of the file) to the name of a symbol
+     * string.  This string is null-terminated. h_importcount - The number of
+     * records in the h_exportsymbols array. */
+
+    u_int32_t h_importsymbols;  /* Offset to list of imported symbols */
+    u_int16_t h_importcount;    /* Number of imported symbols */
+  };
+
+/****************************************************************************
+ * NXFLAT Relocation types.
+ *
+ * The relocation records are an array of the following type.
+ ****************************************************************************/
+
+struct nxflat_reloc_s
+  {
+    u_int32_t r_info;           /* Bit-encoded relocation info */
+  };
+
+/* Pack the type and the offset into one 32-bit value */
+
+#define NXFLAT_RELOC(t,o)       (((u_int32_t)((t) & 3) << 28) | ((o) & 0x1fffffff))
+
+/* The top three bits of the relocation info is the relocation type (see the
+ * NXFLAT_RELOC_TYPE_* definitions below.  This is an unsigned value.
+ */
+
+#define NXFLAT_RELOC_TYPE(r)    ((u_int32_t)(r) >> 28)
+
+/* The bottom 28 bits of the relocation info is the (non-negative) offset into
+ * the D-Space that needs the fixup.
+ */
+
+#define NXFLAT_RELOC_OFFSET(r)  ((u_int32_t)(r) & 0x1fffffff)
+
+/* These are possible values for the relocation type */
+
+#define NXFLAT_RELOC_TYPE_NONE  0     /* Invalid relocation type */
+#define NXFLAT_RELOC_TYPE_TEXT  1     /* Symbol lies in .text region */
+#define NXFLAT_RELOC_TYPE_DATA  2     /* Symbol lies in .data region */
+#define NXFLAT_RELOC_TYPE_BSS   3     /* Symbol lies in .bss region */
+#define NXFLAT_RELOC_TYPE_NUM   4
+
+/****************************************************************************
+ * NXFLAT Imported symbol type 
+ *
+ * The imported symbols are an array of the following type.  The fields
+ * in each element are stored in native machine order.
+ ****************************************************************************/
+
+struct nxflat_import_s
+  {
+    u_int32_t i_funcname;       /* Offset to name of imported function */
+    u_int32_t i_funcaddress;    /* Resolved address of imported function */
+  };
+
+#endif /* __TOOLCHAIN_NXFLAT_NXFLAT_H */
+