On Fri, 2008-07-25 at 13:02 -0400, Jerry Van Baren wrote: > 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.
I know exactly what Grant did. But he is not using the elf relocation information as that is simply not included in the data that is the u-boot.bin file. Also this discussion is more about doing it in a way that is not powerpc specific and documented, we already have as you mentioned code for the powerpc specific way but it's not using elf relocation information. I was afraid that what was needed was more or less a complete linker but it looks like if one generate the dynamic reloc table a much simpler linker(relocation function) is needed. Still probably a lot more complex than the GOT and fixup code that is just a loop over a table. We may need a case also ;-) ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
