In message <[EMAIL PROTECTED]> you wrote: > Hello, > > First, I'm talkin about the 2.6.11 version. I know arch/ppc is gone in > latest versions, > but i assume the code is still the same and just moved to powerpc. > > There is a piece of code in the early initialization of the 2.6 kernel > that identifies the cpu type and then tries to eliminate code that > does not apply to the current cpu. This is done by writing nop's over > sections of code that are not needed (do_cpu_ftr_fixups in > arch/ppc/kernel/misc.S) > > When I try to run the kernel in a ppc emulator, I get a segmentation > fault in do_cpu_ftr_fixups. From examining the section headers of the > vmlinux, the text section is marked as readonly. The piece of code > above mentioned is trying to write a nop to memory location inside the > text section which is readonly, so that explains the sigsegv error.
Any segv in the emulator sounds like a bug in the emulator. If the page really is marked read only, then writing to it should cause a page fault. > Since the kernel does run on boards with ppc cpu's, can somebody > explain how come this is actually working ? Or if/where I am mistaking > with my assumptions ? > > Thank you > > P.S. please add me in cc in a reply to this message > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
