import RT-Thread@9217865c without bsp, libcpu and components/net

components/libc/posix/libdl/dlsym.c

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author      Notes
+ * 2010-11-17     yi.qiu      first version
+ */
+
+#include <rtthread.h>
+#include <rtm.h>
+
+#include "dlmodule.h"
+
+void* dlsym(void *handle, const char* symbol)
+{
+    int i;
+    struct rt_dlmodule *module;
+
+    RT_ASSERT(handle != RT_NULL);
+
+    module = (struct rt_dlmodule *)handle;
+
+    for(i=0; i<module->nsym; i++)
+    {
+        if (rt_strcmp(module->symtab[i].name, symbol) == 0)
+            return (void*)module->symtab[i].addr;
+    }
+
+    return RT_NULL;
+}
+RTM_EXPORT(dlsym)