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Re: objcopy can't localize dynamic symbols?

From: Ian Lance Taylor
Subject: Re: objcopy can't localize dynamic symbols?
Date: 13 Aug 2004 16:42:36 -0400
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3

"Craig Lawson" <address@hidden> writes:

> OK, so objcopy won't alter the dynamic symbol table. Yet I need a tool
> that will. I need to either change global weak symbols to locals, or to
> strip specific dynamic symbols. Does anyone know of a tool that will do
> this?
> If not, then unless there is some fundamental reason which I have not
> yet grasped, I am inclined to add this feature to objcopy. Comments?

In general you can not change the dynamic symbol table of a fully
linked executable or shared library.  This is because they are loaded
into memory, and thus affect the address of other sections.

For specific cases of clobbering dynamic symbols, or changing existing
symbol tables, you might be able to make the changes in place.  There
is no mechanism in BFD to do this.  I think it might make more sense
to write an ELF specific tool.


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