add module feature

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@604 bbd45198-f89e-11dd-88c7-29a3b14d5316

include/rtm.h

@@ -0,0 +1,24 @@
+#ifndef __RTM_H__
+#define __RTM_H__
+
+#include <rtdef.h>
+
+#ifdef RT_USING_MODULE
+#define RTM_EXPORT(symbol)					 							\
+const char __rtmsym_##symbol##_name[] = #symbol;					 	\
+const struct rt_module_symtab __rtmsym_##symbol SECTION("RTMSymTab")= 	\
+{								\
+	(rt_uint32_t)&symbol,		\
+	__rtmsym_##symbol##_name,	\
+};
+#else
+#define RTM_EXPORT(symbol)	
+#endif
+
+struct rt_module_symtab
+{
+	rt_uint32_t addr;
+	const char* name;
+};
+
+#endif