Hi, Kumba wrote:
Initially, booting a straight git checkout on an IP32 will cause it to prom crash, usually somewhere in between init_bootmem() and init_bootmem_core(). I bisected git to trace this back to one of the inital __pa() introduction patches from commit d4df6d4 (get ride of CPHYSADDR()). It actually appears that the actual commit that broke things was 620a480 (Make __pa() aware of XKPHYS/CKSEG0 address mix for 64 bit kernels). The [short-term] fix highlighted by Ilya is to make __pa() unconditionally be defined to "((unsigned long)(x) < CKSEG0 ? PAGE_OFFSET : CKSEG0)"; Discovered by building IP32 with CONFIG_BUILD_ELF64=n.
Well, it means that you previously used CONFIG_BUILD_ELF64=y (this implied that PAGE_OFFSET is in XKPHYS) whereas your kernel has CKSEG load address (symbols need PAGE_OFFSET in CKSEG for address translation). So the question is why can't you use CONFIG_BUILD_ELF64=n (and reagarding the current definition of CONFIG_BUILD_ELF64).
Normally, this shouldn't be possible, as CONFIG_BUILD_ELF64=n was originally only allowed by using the old o64 hack, which has subsequently died and been replaced with the newer -msym32 form. As far as I know, CONFIG_BUILD_ELF64 is apparently supposed to be removed at some point in the future, since I believe it existed only for quirky
It makes me think that I posted a patch for that a couple of weeks ago: http://marc.theaimsgroup.com/?l=linux-mips&m=117154480225936&w=2 http://marc.theaimsgroup.com/?l=linux-mips&m=117154480126802&w=2 http://marc.theaimsgroup.com/?l=linux-mips&m=117154587014827&w=2 Basically this patch removes CONFIG_BUILD_ELF64 and makes Kbuild to use '-msym32' switch if you really need it. Kbuild makes its choice according the load address of your kernel image. Could you give it a try ? This patch was based on 2.6.20 but it should apply fine on a 2.6.21-rc[12]. -- Franck
