[U-Boot-Users] Changing u-boot relocation scheme
Jerry Van Baren
gerald.vanbaren at ge.com
Fri Jul 25 19:02:33 CEST 2008
kenneth johansson wrote:
> On Fri, 2008-07-25 at 17:23 +0200, Haavard Skinnemoen wrote:
[snip]
>> There will obviously be a fair amount of arch-specific code required to
>> make the actual relocation work though.
>
> So the gain of using dynamic relocation is that we have fever relocation
> types to implement and objcopy is not going to strip away the relocation
> section as it do for non dynamic relocs.
>
> still the code to actually do the relocation is architecture dependent
> and non existing. At least for powerpc we have a much easier option of
> having gcc generate a fixup table.
EVERYTHING *already* exists, we just aren't using it right. That is
what the elf loader does in a "normal" system. Grant did it on the
PowerPC architecture - look at the archives, he didn't write new code
for this, it's already in there.
Here is the reversion back to the old way:
<http://article.gmane.org/gmane.comp.boot-loaders.u-boot/33297>
If you un-revert it (re-revert it?), you will have what Grant did. For
some set of PowerPC platforms, it Just Works[tm]. For other
architectures and platforms, start from this and make it work.
Note the list of changed files - no source file changes in it:
board/cogent/u-boot.lds | 1 +
board/hymod/u-boot.lds | 1 +
board/mousse/u-boot.lds | 1 +
board/rsdproto/u-boot.lds | 1 +
cpu/mpc512x/config.mk | 2 +-
cpu/mpc5xx/config.mk | 2 +-
cpu/mpc5xx/u-boot.lds | 1 +
cpu/mpc5xxx/config.mk | 2 +-
cpu/mpc5xxx/u-boot-customlayout.lds | 1 +
cpu/mpc5xxx/u-boot.lds | 1 +
cpu/mpc8220/config.mk | 2 +-
cpu/mpc8220/u-boot.lds | 1 +
cpu/mpc824x/config.mk | 2 +-
cpu/mpc824x/u-boot.lds | 1 +
cpu/mpc8260/config.mk | 2 +-
cpu/mpc8260/u-boot.lds | 1 +
cpu/mpc83xx/config.mk | 2 +-
cpu/mpc83xx/u-boot.lds | 1 +
include/common.h | 8 --------
19 files changed, 18 insertions(+), 15 deletions(-)
Best regards,
gvb
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