Linux help on show strucuture of share lib.

Hi, experts:

Is there any command or uility we can use to show the exact structure of a
share lib on Linux?

I want to know the exact location(offset) of functions ,symbols etc in share
lib, and also in
Linux executable.

I know on AIX we can use a cmd like "dump" to do this thing.

Thanks !
Cheers,
Dayong