Hatt Tom writes:

> thanks for reply!
>
>  I have used dlsym() to reload function A address ,  function B is
> called from A , if I have modified function B ,do I need to use
> dlsym() to reload B's address ?
>
> I think it does not need ,as the dynamic linker will do this when
> linking function A . Am I right ?

If you're not calling function B, you do not need to reload its symbol. You  
only need to call dlsym() for every function in the .so you are directly  
calling from your executable.