On Thu, May 8, 2008 at 11:53 PM, K D <[EMAIL PROTECTED]> wrote: > Hi Manish > > I built my base kernel and UML from same 2.6.24 source but I built them from > seperate directories..something like below: > > /home/user/basekernel/linux-2.6.24/ ===> under here I've built the kernel > /home/user/uml-krnl/linux-2.6.24/ ==> UML > > This is all I did while building UML kernel: > > 1. untar linux source > 2. Edit Makefile and put that "EXTRAVERSION" > 3. make defconfig ARCH=um > 4. make menuconfig ARCH=um > 4.1. enabled "Host File System" option. > 5. make linux ARCH=um >
Ok... I am not sure what is going wrong......but this is what I do and it works for me.......so probably it will work for you too. I compile my modules against the same kernel which I am runnning. [EMAIL PROTECTED] ~]# mount -t hostfs none /mnt/host [EMAIL PROTECTED] fs]# cat a.ksh rm -f *.o *.ko make -C /mnt/host/home/mkatiyar/personal/uml/linux-2.6.23.12 M=`pwd` modules [EMAIL PROTECTED] fs]# ie... mount the baseuml kernel tree under hostfs and compile against it. You can give it a shot Hope that helps....... > Can send Makefile later..isn't that quite big to upload here? > > thanks for helping > > > > ----- Original Message ---- > From: Manish Katiyar <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED]; user-mode-linux-user > <user-mode-linux-user@lists.sourceforge.net> > Sent: Thursday, May 8, 2008 12:04:28 AM > Subject: Fwd: [uml-user] do i have to recompile my module in UML > > ---------- Forwarded message ---------- > From: K D <[EMAIL PROTECTED]> > Date: Thu, May 8, 2008 at 12:27 PM > Subject: [uml-user] do i have to recompile my module in UML > To: user-mode-linux-user@lists.sourceforge.net > > > > Hi > > Am newbie to UML. I have 2.6.24 kernel, which I've built from source. > I've also built UML from 2.6.24 in different directory. I could load > UML from my host OS and mount hostfs without any issue. This is how I > built UML from source, > > 1. untar linux source > 2. make defconfig ARCH=um > 3. make menuconfig ARCH=um > i've set only option 'host file system access', saved the config and did > 4. make linux ARCH=um > > Coming to my problem. I'm developing a kernel module and I hate to > reboot my host OS everytime there is any issue in module. I'm hoping > UML would help me here. When I load my module in host OS, it > loads/unloads without any issue. However, when I try to load this in > UML I get: > > 1. vermagic: "blah blah" should be "blah blah x yz". Invalid format > > > Which kernel source tree you compiled against ?? How does your > makefile look like..... > > > I circumvented above issue by commenting out this vermagic check in > kernel/module.c and rebuilding UML. Now it gets past above error but > I'm getting a kernel panic in mm/slab.c. here is the trace: > > I added this printk() in mm/slab.c to print the name, size of 'prot' > struct and they seem to be NULL and 0. THe same code works without any > issue while loading in host OS. > > ========== > proto_register: name [] size 0 > kmem_cache_create: Early error in slab > BUG: failure at mm/slab.c:2166/kmem_cache_create()! > Kernel panic - not syncing: BUG! > > EIP: 0073:[<ffffe410>] CPU: 0 Not tainted ESP: 007b:bf8e97c0 EFLAGS: > 00000246 > Not tainted > EAX: ffffffda EBX: 40153008 ECX: 000339d7 EDX: 0804a008 > ESI: 00000000 EDI: 00000000 EBP: bf8e9828 DS: 007b ES: 007b > 0bdc3dc0: [<08069c54>] show_regs+0xb4/0xb9 > 0bdc3dec: [<08058c46>] panic_exit+0x25/0x3f > 0bdc3e00: [<08085084>] notifier_call_chain+0x21/0x46 > 0bdc3e20: [<0808511f>] __atomic_notifier_call_chain+0x17/0x19 > 0bdc3e3c: [<08085136>] atomic_notifier_call_chain+0x15/0x17 > 0bdc3e58: [<080704be>] panic+0x52/0xdd > 0bdc3e78: [<080a87c0>] kmem_cache_create+0x1a1/0x3e0 > 0bdc3ec0: [<08145894>] proto_register+0x47/0x1db > 0bdc3efc: [<0c838012>] mymod_init+0x12/0x6a [mymod] > 0bdc3f14: [<08058fb7>] handle_syscall+0x83/0x9c > 0bdc3f60: [<08066b72>] handle_trap+0xd8/0xe1 > 0bdc3f7c: [<08066fe2>] userspace+0x1ac/0x249 > 0bdc3fdc: [<08056a36>] fork_handler+0x74/0x7c > 0bdc3ffc: [<00000000>] obsolete_checksetup+0xf7fb7000/0x88 > > Segmentation fault > [EMAIL PROTECTED] uml]# > > I must be doing something very basic. > > Also the output of "lsmod" is empty inside UML. > > Should (or Can) I recompile my module inside UML? > > thanks for your help. > > > > ________________________________ > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it > now. > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > _______________________________________________ > User-mode-linux-user mailing list > User-mode-linux-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user > > > > > -- > Thanks & Regards, > ******************************************** > Manish Katiyar ( http://mkatiyar.googlepages.com ) > 3rd Floor, Fair Winds Block > EGL Software Park > Off Intermediate Ring Road > Bangalore 560071, India > *********************************************** > > ________________________________ > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it > now. -- Thanks & Regards, ******************************************** Manish Katiyar ( http://mkatiyar.googlepages.com ) 3rd Floor, Fair Winds Block EGL Software Park Off Intermediate Ring Road Bangalore 560071, India *********************************************** ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
