[U-Boot-Users] Fixup entries

Joakim Tjernlund
2008-04-09T23:03:27Z

> -----Original Message-----
> From: kenneth johansson [mailto:kenneth at southpole.se]
> Sent: den 10 april 2008 01:00
> To: Joakim Tjernlund
> Cc: u-boot-users at lists.sourceforge.net
> Subject: RE: [U-Boot-Users] Fixup entries
>
> On Wed, 2008-04-09 at 18:19 +0200, Joakim Tjernlund wrote:
> >
> > > -----Original Message-----
> > > From: Kenneth Johansson [mailto:kenneth at southpole.se]
> > > Wonder if there is something else in u-boot that use function pointers
> > > and work by accident due to the fact that the old address in flash is
> > > still valid.
> >
> > Oh yes, there are a few such pointers. And the conversion to using fixups instead
> > is a bit lazy. Several manual relocations has only been nullified by setting
> > gd->reloc_off=0 instead of #ifdef:ing out the relevant code. Feel
> > free to send patches :)
> >
> > Jocke
> >
>
> If by lazy you mean less error prone and obviously simpler :). clearly
> using -mrelocatable is the smarter thing to do.
>
> I had this misconception that the GOT was all that was needed for
> relocation.
> Could not find any useful information on what rules apply to gcc and
> binutils for handling stuff in this fixup section.
>
> Anybody have any information on this?

Nope, never found anything either. To see a working one in u-boot, look at
mpc83xx start.S and its linker scripts.

Jocke