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Re: relocation entries for absolute symbols

From: Alan Modra <amodra at bigpond dot net dot au>
To: Vivek Goyal <vgoyal at in dot ibm dot com>
Cc: "Peter S. Mazinger" <ps dot m at gmx dot net>, Ian Lance Taylor <iant at google dot com>, Amit Gud <agud at redhat dot com>, binutils at sourceware dot org, bug-binutils at gnu dot org
Date: Wed, 19 Jul 2006 18:42:16 +0930
Subject: Re: relocation entries for absolute symbols
References: <20060713024444.GA14705@in.ibm.com> <Pine.LNX.4.44.0607131040330.6185-100000@lnx.bridge.intra> <20060713133325.GA8409@in.ibm.com>

On Thu, Jul 13, 2006 at 09:33:25AM -0400, Vivek Goyal wrote:
> Everything else seems to be ok if I link with option "-pie -Bsymbolic"
> except the fact that relocations of type R_386_RELATIVE are being 
> generated for absolute symbols.  

Yes, this is a rather sorry result of historical mistakes.  Symbols such
as _GLOBAL_OFFSET_TABLE_ are required to be absolute for compatibility
with old dynamic loaders, but of course they really are not absolute.
They point into the shared lib, so need to be relocated.  This is why
we generate relocations on absolute symbols.

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre

References:
- Re: relocation entries for absolute symbols
  - From: Vivek Goyal
- Re: relocation entries for absolute symbols
  - From: Peter S. Mazinger
- Re: relocation entries for absolute symbols
  - From: Vivek Goyal

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