no1wudi commented on code in PR #12777:
URL: https://github.com/apache/nuttx/pull/12777#discussion_r1692854343


##########
libs/libc/dlfcn/lib_dladdr.c:
##########
@@ -0,0 +1,42 @@
+/****************************************************************************
+ * libs/libc/dlfcn/lib_dladdr.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <errno.h>
+#include <dlfcn.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: dladdr
+ ****************************************************************************/
+
+int dladdr(const FAR void *addr, FAR Dl_info *info)
+{
+  set_errno(ENOTSUP);

Review Comment:
   If the specified address is not located within the address range occupied by 
an examined mapped object, or if an error occurs, zero shall be returned. More 
detailed diagnostic information shall be available through dlerror(), in 
current implementations, dlerror() return the errno (by strerror) directly.



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