On Mon, Sep 24, 2012 at 9:41 PM, Ramesh.P <rameshpa@xxxxxxxxx> wrote: > Hi, > > Please see my comments inline. > > On Fri, Sep 21, 2012 at 2:39 PM, Pritam Bankar > <pritambankar1988@xxxxxxxxx> wrote: >> Hi Ramesh thanks for great pdf. From whatever I understood after >> reading I fired command modinfo on my module and it gave output , >> >> vermagic: 3.2.0-23-generic-pae SMP mod_unload modversions 686 >> >> greping out vermagic. So I believe vermagic is behaving correctly. >> What is 686 in output ? > It represents the arch. the module is built for. In this case, it is 686. > >> Any other reason for missing __versions section ? > The other reason for invalid format is mismatch in arch. like mips vs > 686. It looks like you are trying to run this module on a 386 machine. > Can you confirm you have recompiled the module on the kernel you are > trying to link. > Yes I am running this module on i386 machine and I am linking compiled module on same kernel 3.2.0-23-generic-pae My module works perfectly on x86_64 machine which has same kernel 3.2.0-23-generic but without -pae >> >> On Wed, Sep 19, 2012 at 6:24 AM, Ramesh.P <rameshpa@xxxxxxxxx> wrote: >>> Hi, >>> >>> 'Invalid module' is typically thrown when you don't compile your >>> module against the kernel you are linking into. I think __versions >>> section is added by vermagic.o as part of build process. Please refer >>> http://lwn.net/images/pdf/LDD3/ch02.pdf, Version dependency section >>> for more details. >>> >>> Thanks, >>> Ramesh >>> >>> On Tue, Sep 18, 2012 at 7:10 AM, Pritam Bankar >>> <pritambankar1988@xxxxxxxxx> wrote: >>>> On Tue, Sep 18, 2012 at 7:27 PM, Pritam Bankar >>>> <pritambankar1988@xxxxxxxxx> wrote: >>>>> Any idea what causes __versions section to get added in *.ko module. A >>>>> simple hello.ko on ubuntu 12.04 i386 machine gets loaded successfully. >>>>> Other module just doesn't get loaded giving error " Invalid module ". >>>>> When I compared both modules with objdump -h I found __versions >>>>> section was missing from second module and that can be the reason its >>>>> not getting loaded. How can I add this section to other .ko ? What >>>>> causes __versions to get added in ko ? >>>> >>>> >>>> I have compiled both modules with modpost and Module.symvers. >>>> >>>> >>>> Thanks, >>>> Pritam Bankar >>>> >>>> -- >>>> >>>> Pritam Bankar >>>> >>>> _______________________________________________ >>>> Kernelnewbies mailing list >>>> Kernelnewbies@xxxxxxxxxxxxxxxxx >>>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> >> >> >> -- >> >> Pritam Bankar -- Pritam Bankar _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
