1 files changed, 114 insertions, 0 deletions
diff --git a/nuttx/binfmt/libelf/libelf_unload.c b/nuttx/binfmt/libelf/libelf_unload.c
new file mode 100644
index 000000000..539e5faf7
--- /dev/null
+++ b/nuttx/binfmt/libelf/libelf_unload.c
@@ -0,0 +1,114 @@
+/****************************************************************************
+ * binfmt/libelf/libelf_unload.c
+ *
+ *   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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdlib.h>
+#include <debug.h>
+
+#include <nuttx/kmalloc.h>
+#include <nuttx/binfmt/elf.h>
+
+#include "libelf.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Constant Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: elf_unload
+ *
+ * Description:
+ *   This function unloads the object from memory. This essentially undoes
+ *   the actions of elf_load.  It is called only under certain error
+ *   conditions after the the module has been loaded but not yet started.
+ *
+ * Returned Value:
+ *   0 (OK) is returned on success and a negated errno is returned on
+ *   failure.
+ *
+ ****************************************************************************/
+
+int elf_unload(struct elf_loadinfo_s *loadinfo)
+{
+  /* Free all working buffers */
+
+  elf_freebuffers(loadinfo);
+
+  /* Release memory holding the relocated ELF image */
+
+  elf_addrenv_free(loadinfo);
+ 
+   /* Release memory used to hold static constructors and destructors */
+
+#ifdef CONFIG_BINFMT_CONSTRUCTORS
+  if (loadinfo->ctoralloc != 0)
+    {
+      kfree(loadinfo->ctoralloc);
+      loadinfo->ctoralloc = NULL;
+    }
+
+   loadinfo->ctors   = NULL;
+   loadinfo->nctors  = 0;
+
+  if (loadinfo->dtoralloc != 0)
+    {
+      kfree(loadinfo->dtoralloc);
+      loadinfo->dtoralloc = NULL;
+    }
+
+   loadinfo->dtors   = NULL;
+   loadinfo->ndtors  = 0;
+#endif
+
+  return OK;
+}
+