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In-Reply-To: <20060831153800.GQ4556@sunsite.mff.cuni.cz>
Subject: Re: [PATCH] Fix tst-addr1 on ppc64 and ia64
To: Jakub Jelinek <jakub@redhat.com>
Cc: Ulrich Drepper <drepper@redhat.com>,
        Glibc hackers <libc-hacker@sources.redhat.com>,
        libc-hacker-owner@sourceware.org
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From: Steve Munroe <sjmunroe@us.ibm.com>
Date: Thu, 31 Aug 2006 15:56:00 -0000
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Jakub Jelinek <jakub@redhat.com> wrote on 08/31/2006 10:38:00 AM:

> Hi!
>
> On ppc64 and ia64 &printf is put into GOT, so the SHN_UNDEF printf
> symbol has zero st_value and thus dladdr (&printf, ...) returns
> a symbol in libc.so.  But, unfortunately, in libc.so _IO_printf
> is an alias to printf, both are global symbols and have the same
> address and size.  Which one comes first in the hash table depends
> on the linker.
>

Thanks I have been scratching my head over that one :)

Steven J. Munroe