Re: Linker Bug or Design Intent (Absolute symbols in zero sized sections)

[Daniel Jacobowitz <drow at false dot org>]

On Wed, Sep 27, 2006 at 08:57:14AM +0930, Alan Modra wrote:
> On Tue, Sep 26, 2006 at 12:45:20PM -0400, Daniel Jacobowitz wrote:
> > On Tue, Sep 26, 2006 at 09:30:24AM -0700, H. J. Lu wrote:
> > > Convert section relative symbol to absolute shouldn't be a problem
> > > in most cases. If we know it may be a problem at link time, we can
> > > keep it section relative.
> > 
> > You keep saying this, but on various platforms it isn't true.  Section
> > relative symbols move with an object if it is relocated in any way.
> > Absolute symbols don't.
> 
> This isn't true for the common ELF targets.  An absolute symbol in a
> shared library is effectively relative to the base of the shared lib.
> A sad consequence of defining syms like _GLOBAL_OFFSET_TABLE_ and
> _DYNAMIC as absolute.

Which I tried to change, you may recall :-)  For those platforms which
do care, absolute _G_O_T_ is a serious problem, and there's a knob for
it.

-- 
Daniel Jacobowitz
CodeSourcery