[EMAIL PROTECTED] wrote: > Boaz Harrosh wrote: >> [EMAIL PROTECTED] wrote: >> >>> Boaz Harrosh wrote: >>> >>>> [EMAIL PROTECTED] wrote: >>>> >>>> >>>>> Hi! >>>>> >>>>> I've compiled an UML kernel based on 2.6.25 but loading kernel modules >>>>> seems to be broken. No matter which module I try to load the output >>>>> looks similar to this: >>>>> >>>>> overflow in relocation type 11 val 80836d41 >>>>> 'loop' likely not compiled with -mcmodel=kernel >>>>> >>>>> After searching for a while I found some threads from 2006 discussing >>>>> this issue, e.g.: >>>>> http://www.mail-archive.com/user-mode-linux-devel@lists.sourceforge.net/msg03693.html >>>>> and >>>>> http://marc.info/?l=user-mode-linux-devel&m=115125101012707&w=2 >>>>> >>>>> As Andi Kleen has mentioned in a mail from the first thread, simply >>>>> appending "-mcmodel=kernel" to the KBUILD_CFLAGS does not work (I tried >>>>> it anyway and can confirm his statement ;) >>>>> >>>>> Since I could not find any solution I've decided to write this mail and >>>>> ask about the current state of this issue and of course for a solution! >>>>> I simply don't want to believe that there is no loadable module support >>>>> for UML in 2008... >>>>> >>>>> Regards >>>>> JK >>>>> >>>>> >>>>> >>>> Every thing is fine down here. What host Kernel-gcc-glibc / uml-gcc-glibc >>>> are you using? >>>> >>>> I'm using out-of-tree modules with uml for every kernel since 2.6.19. >>>> I have both Host and UML as x86_64 on FC7 with gcc 4.1.2 >>>> >>>> Boaz >>>> >>>> >>>> >>> I'm glad to here that the bug has been fixed. Anyway, it does not work >>> with my configuration: >>> >>> - CentOS 5.1 as host system and UML root fs >>> - Kernel 2.6.25.4 (vanilla, but config taken from the CentOS kernel) >>> - GCC 4.1.2 >>> - GLIBC 2.5 >>> >>> Regards >>> JK >>> >>> >> >> I used to run with red-hat 4.5 so this should work. >> 64 bit, right? >> >> From passed experience I've seen that UML will only >> work if I first do "make ARCH=um defconfig" and then >> manually enable any needed options with make xconfig. >> other wise it breaks in all kind of ways. Even doing >> a make oldconfig on a good uml config file from older >> kernel will not work. Try to do defconfig and see if >> it loads at all. >> >> How do you compile and run the out-of-tree module >> or is it one of the built in modules? >> >> Boaz >> >> > I tried what you've suggested and did the following: > - make mrproper > - make defconfig ARCH=um > - make linux ARCH=um > - make modules ARCH=um > - make modules_install INSTALL_MOD_PATH=/path/to/mounted/uml_root_fs ARCH=um > > It did not work (same result). > > After that, I copied the kernel source to the uml-root-fs, started the > UML and did a 'make clean' and 'make modules ARCH=um' inside the running > UML, followed by a 'make modules_install'. Again, it did not work. > > After that, I've extracted the kernel source again (completely vanilla) > and restarted at 'make defconfig'. Same result. > No module is loadable. They all have 'invalid fomrat' an the usage of > the '-mcmodel=kernel' flag is suggested. > > BTW : with the same sources (and the same commands as listed above) I've > successfully built a fully working 32 bit UML kernel! > > I've also tried kernel 2.6.24.7 with identical results. > > Last but not least, I've tried the same with a fresh download of the > 2.6.26 kernel. Unfortunately, this time there was another problem: the > kernel exits with a panic on startup (tried to build it twice with the > same result). According to the stack-trace, the panic happens somewhere > inside "get_page_from_free_list()"... > > I'm really running out of ideas right now, does anyone have some > suggestions? > > Regards > JK >
It all works down here. Just a long shot you have installed uml_utilities on the host ... I run the uml from the root of the source tree like this: ./.build_um/vmlinux ubd0=/usr0/var/local/um/Fedora7-AMD64-root_fs eth0=tuntap,,,192.168.0.117 mem=256M (The .build_um/ is because I use KBUILD_OUTPUT=.build_um so I can compile multiple targets from same source tree) Maybe there is some package missing from the Linux image you are using. You are using a 64bit Linux image with your 64bit kernel, yes? Try to compare the 32 bit image with the 64bit one. See if they have the same packages installed. I started with a ready made fedora7 uml image and never really touched it much except the occasional yum install of a library or two. Boaz ------------------------------------------------------------------------- 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=/ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
