Bug#205234: 2.3.2-7 + pthread + vsyslog()
On Fri, Sep 19, 2003 at 12:55:21AM +0100, Philip Blundell wrote:
> On Fri, 2003-09-19 at 00:40, Daniel Jacobowitz wrote:
> > OK, one is the PLT reference, the other is the global data. Shouldn't
> > that global data be fixed up by the loader?
>
> For that to work, the loader would have to remember that it had seen an
> unresolved weak reference to those symbols in the GOT, then go back and
> fill in the appropriate entries once it noticed that an object
> containing those symbols had been loaded. As far as I know, it doesn't
> do that. (If it did, I think you could easily get into sticky
> situations when objects were later unloaded.)
Ouch - you're right of course, later it would be unloaded and the
global data would still point at it. The linker shouldn't go fixing it
up - it might be an initial value of a writable variable, and having
dlopen clobber it would be upsetting.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
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