1 files changed, 116 insertions, 0 deletions
diff --git a/nuttx/binfmt/libnxflat/libnxflat_verify.c b/nuttx/binfmt/libnxflat/libnxflat_verify.c
new file mode 100644
index 000000000..b31994b8b
--- /dev/null
+++ b/nuttx/binfmt/libnxflat/libnxflat_verify.c
@@ -0,0 +1,116 @@
+/****************************************************************************
+ * nxflat/lib/nxflat_stack.c
+ *
+ *   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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <nuttx/nxflat.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define V_MAP   (load_info->vtbl->map)
+#define V_UNMAP (load_info->vtbl->unmap)
+#define V_ALLOC (load_info->vtbl->alloc)
+#define V_FREE  (load_info->vtbl->free)
+#define V_OPEN  (load_info->vtbl->open)
+#define V_READ  (load_info->vtbl->read)
+#define V_CLOSE (load_info->vtbl->close)
+
+#define XFLT_HDR_SIZE   sizeof(struct nxflat_hdr_s)
+
+#ifndef MAX
+#  define MAX(x,y) ((x) > (y) ? (x) : (y))
+#endif
+
+/****************************************************************************
+ * Private Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxflat_verifyheader
+ ****************************************************************************/
+
+int nxflat_verifyheader(const struct nxflat_hdr_s *header)
+{
+  uint16 revision;
+
+  if (!header)
+    {
+      dbg("NULL NXFLAT header!");
+      return -ENOEXEC;
+    }
+
+  /* Check the FLT header -- magic number and revision.
+   * 
+   * If the the magic number does not match.  Just return
+   * silently.  This is not our binary.
+   */
+  
+  if (strncmp(header->h_magic, "NXFLAT", 4) != 0)
+    {
+      dbg("Unrecognized magic=\"%c%c%c%c\"",
+	  header->h_magic[0], header->h_magic[1],
+	  header->h_magic[2], header->h_magic[3]);
+      return -ENOEXEC;
+    }
+
+  /* Complain a little more if the version does not match. */
+
+  revision = ntohs(header->h_rev);
+  if (revision != NXFLAT_VERSION_CURRENT)
+    {
+      dbg("Unsupported NXFLAT version=%d\n", revision);
+      return -ENOEXEC;
+    }
+  return 0;
+}
+