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SH relocation differences in older versions of the binutils

Jeff Baker jbaker@qnx.com
Tue Dec 16 21:09:00 GMT 2003 
Turns out that this isn't exactly the problem we're having.  We're still
using 2.12.1, which is well before these changes were made.  Also, as a
happy coincidence, none of the relocs that we emit seem to have moved so
hopefully we can gracefully begin to use a new version of the binutils in
the near future without this causing us headaches.

The problem we're having boils down to what seems to be a fix for the way
that the SH ld handled addends in 2.10.1.  Specifically the changes proposed
in this posting: http://sources.redhat.com/ml/binutils/2001-09/msg00302.html

To help us work with both of these issues we're wondering a couple of
things.

1)  Is there currently, or should there be, some sort of indicator included
in object files that specifies which version of the binutils it was produced
with?

2)  Is there a reliable method of determining whether an SH object file is
using the addends correctly?  We want to be able to detect and warn, or
potentially correct older objects.

> A few questions, if I may.
> 
> Would I be correct in saying that the reason that the ABIVERSION was not
> incremented with this change is because it was ultimately considered a
> huge bug fix instead of a new ABI?
> 
> Aside from parsing the relocs and attempting to determine which version of
> the table they're using, can anyone recommend a way to determine whether
> an object uses the old relocs or new?  Right now we're looking for a way
> to dynamically translate the reloc table to the new relocs at link time.
> 
> > AHA.  That's exactly what I was looking for, thanks.
> >
> > > -----Original Message-----
> > > From: DJ Delorie [mailto:dj@redhat.com]
> > > Sent: Friday, December 12, 2003 2:30 PM
> > > To: jbaker@qnx.com
> > > Cc: binutils@sources.redhat.com
> > > Subject: Re: SH relocation differences in older versions of the
> binutils
> > >
> > >
> > > > Does anyone know/remember what would have changed with the handling
> of
> > > > relocations for SH between these two versions of the binutils?
> > >
> > > You'll want to read through this thread:
> > >
> > > http://sources.redhat.com/ml/binutils/2003-08/msg00271.html
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