construct module symbol table

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1053 bbd45198-f89e-11dd-88c7-29a3b14d5316

include/rtdef.h

@@ -392,6 +392,13 @@ struct rt_module
 	rt_list_t	module_page;								/* module using page		 				*/
 	void*		page_node_pool;						
 
+	/* module symbol table */
+	rt_uint32_t nsym;
+	struct rt_module_symtab *symtab;
+
+	/* reference count */
+	rt_uint32_t nref;		
+	
 	/* object in this module, module object is the last basic object type */
 	struct rt_object_information module_object[RT_Object_Class_Module];
 };

include/rtthread.h

@@ -308,8 +308,8 @@ rt_err_t  rt_device_control(rt_device_t dev, rt_uint8_t cmd, void* arg);
  */
 
 rt_module_t rt_module_load(const rt_uint8_t* name, void* module_ptr);
-rt_module_t rt_module_load_from_file(const rt_uint8_t* name, const char* filename);
 rt_err_t rt_module_unload(rt_module_t module);
+rt_module_t rt_module_open(const char* filename);
 void *rt_module_malloc(rt_size_t size);
 void *rt_module_realloc(void *ptr, rt_size_t size);
 void rt_module_free(rt_module_t module, void *addr);