The dynamic linking loader routine dlopen needs to find the shared object file in the filesystem to open the file and create the handle 动态链接装入器例程dlopen需要在文件系统中查找共享目标文件以打开文件并创建句柄。
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The application controls which dynamic libraries are loaded and which functions in the libraries are called by using linux dynamic loader routines to perform the loading and linking and to return the addresses of the required entry points 通过使用linux动态装入器例程，应用程序控制装入哪一个动态库以及调用库中的哪一个函数，以执行装入和链接以及返回所需入口点的地址。
