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