From: "Ulrich Weigand" <uweigand@de.ibm.com>
To: drow@false.org (Daniel Jacobowitz)
Cc: gdb-patches@sourceware.org
Subject: Re: [rfc] Fix mst_solib_trampoline symbol sections for PLT stubs
Date: Wed, 31 Oct 2007 17:56:00 -0000 [thread overview]
Message-ID: <200710311429.l9VETrn1025150@d12av02.megacenter.de.ibm.com> (raw)
In-Reply-To: <20071031020856.GA30157@caradoc.them.org> from "Daniel Jacobowitz" at Oct 30, 2007 10:08:56 PM
Daniel Jacobowitz:
> Yes. But if the address of the function is not taken somewhere in the
> executable, then the address of the undefined symbol will generally be
> left at zero. That should be true most of the time. So while I don't
> see anything wrong with your approach here, I'm surprised it fixed the
> testsuite failures; why do they have non-zero addresses? If we're
> taking their addresses in all cases, we need some new tests.
I think this is because there are function calls from the main
executable to those functions, and the main executable is not
compiled with -fPIC. I understand those references will also
cause the undefined symbol to carry the address of the main
PLT call stub ...
Bye,
Ulrich
--
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE
Ulrich.Weigand@de.ibm.com
next prev parent reply other threads:[~2007-10-31 14:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-31 2:09 Ulrich Weigand
2007-10-31 3:17 ` Daniel Jacobowitz
2007-10-31 17:56 ` Ulrich Weigand [this message]
2007-10-31 18:06 ` Daniel Jacobowitz
2007-10-31 20:41 ` Ulrich Weigand
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