[U-Boot] [PATCH] relocation: Do not relocate NULL pointers.

[Wolfgang Denk <wd@denx.de>]

Dear Peter Tyser,

In message <1254784811.24664.968.camel@localhost.localdomain> you wrote:
> 
> > 1. is just a small fix the the existing asm reloc functions. Pretty much
> >    ready but needs some linker tweeks it seems. No idea if other
> >    boards than 85xx also needs a linker tweak or not.
> 
> It looks like 85xx is the only arch that needed linker script tweaks.  I
> just submitted some patches a bit ago.

I think this code is too complex. Eventually we could hard-wire
something like ". = 0x40000" or similar for a fixed location of the
(pre-relocation) bss on all 85xx/86xx systems.

> > 2. is 1 in C and some common supporting asm for ppc. Any idea were
> >    to put common asm files for ppc? I was hoping I could get away with
> >    just 83xx and the rest could be done later by interested parties?
> 
> Assuming the 85xx link script changes are accepted, what's the gameplan
> now?  #1 is pretty trivial (the original patch that spawned this thread
> with slight tweaks) and should be easy to get in this merge window.
> That would get us to the point that relocation is fully functional,
> including non-relocation of NULL pointers.

I think this is a nice and realistic goal for the current release.

> #2 looks more involved and prone to errors as it requires some shuffling
> of registers in assembly for all architectures.  Are we aiming for
> getting #2 across all architectures in this window?  I should be able to
> implement and test it on 85xx, 86xx, and 44x, and Jocke's tested on
> 83xx.  I don't think I could do the rest of the arches by the end of
> this week though.  Any other takers?  Save it for the next merge window?

I guess this is for next version.


Um... jut to be sure - I understand that by "all architectures" above
you actually mean "all Power architecture CPU families",  i.  e.  you
don't include the needed cleanup for ARM, MIPs, etc. here (yet) ?

Best regards,

Wolfgang Denk

--
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
365 Days of drinking Lo-Cal beer.                       1 Lite-year