[U-Boot] [PATCH RFC] armv7: fixloop: don't fixup if location is NULL

[Joakim Tjernlund]

>
> Le 08/01/2011 11:49, Albert ARIBAUD a écrit :
>
> >> In my investigations for 'NULL fixup' (-> see
> >> http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/89864/focus=89906)
> >> pointed out that only symbols in 'absolute fixup' loop could be 'NULL'
> >> if there is a not aliased/empty weakly linked symbol.
>
> BTW: is such a situation normal? IIUC, it means there is a weakly linked
> symbol without *any* defintion, *and* it is referenced in the code.
> Granted, maybe it is checked before it is referenced, but we may want to
> check for and report at build time if possible. Would that be useful?

Not very normal but it is a bug that should be fixed so you don't
crash and burn. The behaviour should be the same on all archs.

Then you could consider adding a build time failure for undef weaks
if WD et. all think it is a good idea. I don't see
a good reason to ban undef. weaks ATM. One day they might be needed.