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Re: rs6000_flag_pic

From: Alan Modra <amodra at bigpond dot net dot au>
To: David Edelsohn <dje at watson dot ibm dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Thu, 13 Mar 2003 11:05:44 +1030
Subject: Re: rs6000_flag_pic
References: <20030312234249.GT23858@bubble.sa.bigpond.net.au> <200303122351.SAA09742@makai.watson.ibm.com>

On Wed, Mar 12, 2003 at 06:51:37PM -0500, David Edelsohn wrote:
> 	This functionality was implemented for AIX and PPC64 because
> vtables requiring relocations were being placed in the wrong section and
> not being shared.

OK, thanks for the info.  Compiling a few quick examples (from
ld/testsuite/ld-selective/*.cc) shows that with my patch, the vtables
indeed go from being in rw sections to ro sections.  However, the
vtables just have a bunch of R_PPC64_ADDR64 relocs, which won't be
dynamic.  Hmm, I suppose the problem only shows up when linking
a -fno-pic app against shared libs.  Do you have testcases?

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre

Follow-Ups:
- Re: rs6000_flag_pic
  - From: David Edelsohn
- Re: rs6000_flag_pic
  - From: Richard Henderson

References:
- Re: rs6000_flag_pic
  - From: Alan Modra
- Re: rs6000_flag_pic
  - From: David Edelsohn

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