modify nuttx bug of lack of files

2021-06-11 11:25:07 +08:00
parent 4a7f51a5e9
commit 6d0f2ca39a
6752 changed files with 1528133 additions and 0 deletions
@@ -0,0 +1,116 @@
+/****************************************************************************
+ * sched/module/mod_modsym.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 <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/module.h>
+#include <nuttx/symtab.h>
+#include <nuttx/lib/modlib.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: modsym
+ *
+ * Description:
+ *   modsym() returns the address of a symbol defined within the object that
+ *   was previously made accessible through a insmod() call.  handle is the
+ *   value returned from a call to insmod() (and which has not since been
+ *   released via a call to rmmod()), name is the symbol's name as a
+ *   character string.
+ *
+ *   The returned symbol address will remain valid until rmmod() is called.
+ *
+ * Input Parameters:
+ *   handle - The opaque, non-NULL value returned by a previous successful
+ *            call to insmod().
+ *   name   - A pointer to the symbol name string.
+ *
+ * Returned Value:
+ *   The address associated with the symbol is returned on success.
+ *   If handle does not refer to a valid module opened by insmod(), or if
+ *   the named symbol cannot be found within any of the objects associated
+ *   with handle, modsym() will return NULL and the errno variable will be
+ *   set appropriately.
+ *
+ *   NOTE: This means that the address zero can never be a valid return
+ *   value.
+ *
+ ****************************************************************************/
+
+FAR const void *modsym(FAR void *handle, FAR const char *name)
+{
+  FAR struct module_s *modp = (FAR struct module_s *)handle;
+  FAR const struct symtab_s *symbol;
+  int err;
+  int ret;
+
+  /* Verify that the module is in the registry */
+
+  modlib_registry_lock();
+  ret = modlib_registry_verify(modp);
+  if (ret < 0)
+    {
+      berr("ERROR: Failed to verify module: %d\n", ret);
+      err = -ret;
+      goto errout_with_lock;
+    }
+
+  /* Does the module have a symbol table? */
+
+  if (modp->modinfo.exports == NULL || modp->modinfo.nexports == 0)
+    {
+      berr("ERROR: Module has no symbol table\n");
+      err = ENOENT;
+      goto errout_with_lock;
+    }
+
+  /* Search the symbol table for the matching symbol */
+
+  symbol = symtab_findbyname(modp->modinfo.exports, name,
+                             modp->modinfo.nexports);
+  if (symbol == NULL)
+    {
+      berr("ERROR: Failed to find symbol in symbol \"%s\" in table\n", name);
+      err = ENOENT;
+      goto errout_with_lock;
+    }
+
+  /* Return the address within the module associated with the symbol */
+
+  modlib_registry_unlock();
+  DEBUGASSERT(symbol->sym_value != NULL);
+  return symbol->sym_value;
+
+errout_with_lock:
+  modlib_registry_unlock();
+  set_errno(err);
+  return NULL;
+}