Re: Symbol Hiding

From: Paul Pluzhnikov <ppluzhnikov-nsp@xxxxxxxxxxx>
Date: Wed, 28 Mar 2007 06:58:43 -0700

"newbei" <newtoqtopia@xxxxxxxxxxx> writes:

do nm libhello.so
I find both functions hello and sizeOfInt() in it why?

Because you are looking in the wrong place.

ELF shared objects (and executables) have *two* symbol tables --
a "regular" one (used mostly for debugging after the exe/DSO
is built) and a "dynamic" one (used by the dynamic loader for
inter-library symbol resolution).

To examine the dynamic symbol table, use 'nm -D' or 'objdump -T'.
The sizeOfInt should not be in *that* output, and so is "invisible"
to the dynamic loader.

Question 2:
What is the difference between strip and symbol hiding.

Strip manipulates the "regular" symbol table (which you do not care
about, except for debugging).

Cheers,
--
In order to understand recursion you must first understand recursion.
Remove /-nsp/ for email.
.

Follow-Ups:
- Re: Symbol Hiding
  - From: newbei

References:
- Symbol Hiding
  - From: newbei

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