[U-Boot] Relocation issue - need help!

[Joakim Tjernlund]

> 
> Hello Wolfgang,
> 
> 2014-10-22 18:56 GMT+02:00 Wolfgang Denk <wd at denx.de>:
> > Dear Dirk,
> >
> > In message 
<CANVMifLGzKz+=-K-E9_sSXBxpYPdG1YqEXc-tsCApi7WVxQAHg at mail.gmail.com> you 
wrote:
> >> I had exactly the same behaviour some time ago and tracked it down to
> >> this (and posted it on the mailing list, but sadly got no feedback):
> >
> > Thanks a lot for this pointer.
> 
> I am really glad this was helpful. It was very nasty to track down, so
> I was really concerned when I found it. For that reson I chose "u-boot
> ppc does not work with gcc 4.8" as a topic when I reported it to
> U-Boot mailing list and put you on CC on august 5th. But maybe I
> should have been more explicit, something like "APOCALYPSE NOW: u-boot
> ppc does not work with gcc 4.8" ;)
> 
> This problem is *not* fixed by the links Marek addressed.
> 
> Just a quick explanation of what is going on:
> Since gcc 4.8 we have new sections .data.rel.ro and
> .data.rel.ro.local. They contain absolute addresses that should really
> be fixed up in our relocation process but are not considered yet.
> In your case  you wre running u-boot referencing the not fixed-up
> addresses which worked perfectly as long as they still pointed to
> valid content. But as soon as you erased flash this was no longer the
> case. To make debugging even more fun, behaviour also depends on cache
> contents.

Ouch, that was a nasty surprise.

> 
> In my original mail I referenced this potential solution, at least it
> worked for me:
> https://gcc.gnu.org/ml/gcc-help/2014-02/msg00054.html

That looks like the correct fix but I presume both .data.rel.ro and
data.rel.ro.local should be added?

 Jocke