Re: N900 kernel module recompile
Hi, ext Nils Faerber wrote: Frantisek Dufka schrieb: Nils Faerber wrote: Then kernel config: cp arch/arm/configs/rx51_defconfig ./.config make oldconfig A "make modules" does cleanly compile the modules. Fine so far (except for that te modules are *huge* and a "arm-none-linux-gnueabi-strip -R .not -R .comment --strip-unneeded" seems reasonable). Looks like this strips module version symbols too. Tried similar approach with same result before. Just tried it - works like a charm ;) And the module shrinks from ~200k to ~20k. I think the kernel debian source package should be using dh_strip to automatically separate the debug symbols to a separate (kernel-debug?) package. Debug symbol package is handy for debugging if you get any issues - Eero ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
Frantisek Dufka schrieb: > Nils Faerber wrote: >> Then kernel config: >> cp arch/arm/configs/rx51_defconfig ./.config >> make oldconfig >> A "make modules" does cleanly compile the modules. Fine so far (except >> for that te modules are *huge* and a "arm-none-linux-gnueabi-strip -R >> .not -R .comment --strip-unneeded" seems reasonable). > > Looks like this strips module version symbols too. Tried similar > approach with same result before. Just tried it - works like a charm ;) And the module shrinks from ~200k to ~20k. Cheers nils -- kernel concepts GbR Tel: +49-271-771091-12 Sieghuetter Hauptweg 48 Fax: +49-271-771091-19 D-57072 Siegen Mob: +49-176-21024535 http://www.kernelconcepts.de ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
Nils Faerber wrote: Then kernel config: cp arch/arm/configs/rx51_defconfig ./.config make oldconfig A "make modules" does cleanly compile the modules. Fine so far (except for that te modules are *huge* and a "arm-none-linux-gnueabi-strip -R .not -R .comment --strip-unneeded" seems reasonable). Looks like this strips module version symbols too. Tried similar approach with same result before. But when I try to load one of the new modules I get: -1 Invalid module format And dmesg shows: "no symbol version for struct_module" In addition I got hit by message saying that the version does not match. I did some 'harmless' changes to kernel configuration before and found them not to be so harmless wrt symbol versions :-( Even when copying original config back and recompiling kernel and modules (trying also with make clean, make mrproper) they were still different. I had to restore Module.symvers file from kernel source. ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
Following exactly the steps from http://wiki.maemo.org/Documentation/Maemo_5_Developer_Guide/Kernel_and_Debugging_Guide/Maemo_Kernel_Guide did the trick and the module loads fine now! Very cool! Though the process seem too complicated to me so after I did my hacking I will look into simplyfying that. Anyway, many thanks to all for pointing me in the right direction! Cheers nils Jeff Moe schrieb: > On Thursday 18 February 2010 10:18:48 Nils Faerber wrote: >> Hi all! >> After all that RPM vs DEB debate I thought I could bring up something >> more productive ;) >> >> I would like to hack on some drivers on the N900, so I need to be able >> to recompile kernel modules. Ideally I would like only to replace >> modules, not the whole kernel+modules package. >> >> So what I did was I installed the Maemo5 SDK first in order to get the >> proper toolchain. >> Then I took a vanilla 2.6.28 Linux kernel archive and applied the kernel >> patch from >> http://repository.maemo.org/pool/fremantle/free/k/kernel/ >> kernel_2.6.28-20094803.3+0m5.diff.gz >> >> Then I setup my comile environment: >> >> export PATH=/scratchbox/compilers/cs2007q3-glibc2.5-arm7/bin/:$PATH >> export CROSS_COMPILE=arm-none-linux-gnueabi- >> export ARCH=arm >> >> Then kernel config: >> cp arch/arm/configs/rx51_defconfig ./.config >> make oldconfig >> >> A "make modules" does cleanly compile the modules. Fine so far (except >> for that te modules are *huge* and a "arm-none-linux-gnueabi-strip -R >> .not -R .comment --strip-unneeded" seems reasonable). >> >> But when I try to load one of the new modules I get: >> -1 Invalid module format >> And dmesg shows: >> "no symbol version for struct_module" >> >> This usually means that CONFIG_MODVERSIONS is not set but I double >> checked that and I do have "CONFIG_MODVERSIONS=y" in ".config". >> >> I also changed the extra version name in the kernel toplevel Makefile, >> which should be correct (to my knowledge): >> >> #NAME = Erotic Pickled Herring >> NAME = maemo >> >> There is an older page about recompiling kernel for Diablo in the Wiki: >> http://wiki.maemo.org/Compiling_the_kenrel >> Would that still apply (of course replacing Diablo with Freemantle and >> N810 with N900 or RX51 respectively)? >> >> Again, I just want to hack on one single module. So I would like to >> avoid having to flash a completely home-grown kernel+modules set >> (frankly that scares me a little ;) >> >> >> Any hint would be really appreciated ;) >> Some N900 kernel hackers around here? >> >> Ideally I would like to make my changes available again so that others >> can also play with them by just replacing a single .ko-module... > > This isn't exactly what you want, but should provide some hints: > > http://wiki.maemo.org/User:Jebba/Kernel > > This dir has my live scratchbox with some scriptlets which may help you see > the procedure: > http://www.freemoe.org/users/jebba/scratchbox/kernel/ > > Have fun, > > -Jeff Moe > ___ > maemo-developers mailing list > maemo-developers@maemo.org > https://lists.maemo.org/mailman/listinfo/maemo-developers > -- kernel concepts GbR Tel: +49-271-771091-12 Sieghuetter Hauptweg 48 Fax: +49-271-771091-19 D-57072 Siegen Mob: +49-176-21024535 http://www.kernelconcepts.de ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
On Thursday 18 February 2010 10:18:48 Nils Faerber wrote: > Hi all! > After all that RPM vs DEB debate I thought I could bring up something > more productive ;) > > I would like to hack on some drivers on the N900, so I need to be able > to recompile kernel modules. Ideally I would like only to replace > modules, not the whole kernel+modules package. > > So what I did was I installed the Maemo5 SDK first in order to get the > proper toolchain. > Then I took a vanilla 2.6.28 Linux kernel archive and applied the kernel > patch from > http://repository.maemo.org/pool/fremantle/free/k/kernel/ > kernel_2.6.28-20094803.3+0m5.diff.gz > > Then I setup my comile environment: > > export PATH=/scratchbox/compilers/cs2007q3-glibc2.5-arm7/bin/:$PATH > export CROSS_COMPILE=arm-none-linux-gnueabi- > export ARCH=arm > > Then kernel config: > cp arch/arm/configs/rx51_defconfig ./.config > make oldconfig > > A "make modules" does cleanly compile the modules. Fine so far (except > for that te modules are *huge* and a "arm-none-linux-gnueabi-strip -R > .not -R .comment --strip-unneeded" seems reasonable). > > But when I try to load one of the new modules I get: > -1 Invalid module format > And dmesg shows: > "no symbol version for struct_module" > > This usually means that CONFIG_MODVERSIONS is not set but I double > checked that and I do have "CONFIG_MODVERSIONS=y" in ".config". > > I also changed the extra version name in the kernel toplevel Makefile, > which should be correct (to my knowledge): > > #NAME = Erotic Pickled Herring > NAME = maemo > > There is an older page about recompiling kernel for Diablo in the Wiki: > http://wiki.maemo.org/Compiling_the_kenrel > Would that still apply (of course replacing Diablo with Freemantle and > N810 with N900 or RX51 respectively)? > > Again, I just want to hack on one single module. So I would like to > avoid having to flash a completely home-grown kernel+modules set > (frankly that scares me a little ;) > > > Any hint would be really appreciated ;) > Some N900 kernel hackers around here? > > Ideally I would like to make my changes available again so that others > can also play with them by just replacing a single .ko-module... This isn't exactly what you want, but should provide some hints: http://wiki.maemo.org/User:Jebba/Kernel This dir has my live scratchbox with some scriptlets which may help you see the procedure: http://www.freemoe.org/users/jebba/scratchbox/kernel/ Have fun, -Jeff Moe ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
Hi Nils On Thu, Feb 18, 2010 at 6:18 PM, Nils Faerber wrote: > Hi all! > After all that RPM vs DEB debate I thought I could bring up something > more productive ;) Thanks! > > I would like to hack on some drivers on the N900, so I need to be able > to recompile kernel modules. Ideally I would like only to replace > modules, not the whole kernel+modules package. > > So what I did was I installed the Maemo5 SDK first in order to get the > proper toolchain. The best to start with is to follow the Maemo Kernel Guide. If you follow that and dont' forget to use the extra version trick make EXTRAVERSION=-omap1 bzImage you can indeed scp modules to the device and probe them ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
On 18.02.10 19:40, Nils Faerber wrote: > OK, I will try - never compiled a kernel using the debian build system :) it's almost trivial :) I suggest to take a look at my custom kernel source in extras-devel/non-free (due to non-free fiasco-gen). I have converted it to use quilt which makes integration of other community matches much easier. -- Thomas Tanner -- email: tan...@gmx.de GnuPG: 1024/5924D4DD ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
Thomas Tanner schrieb: > On 18.02.10 18:18, Nils Faerber wrote: >> I would like to hack on some drivers on the N900, so I need to be able >> to recompile kernel modules. Ideally I would like only to replace >> modules, not the whole kernel+modules package. >> >> So what I did was I installed the Maemo5 SDK first in order to get the >> proper toolchain. >> Then I took a vanilla 2.6.28 Linux kernel archive and applied the kernel >> patch from > > "apt-get source kernel" would be easier That is inside scratchbox having selected the armel target? I can try that, sure! > Do you plan to provide the extra modules as a package > in extras-devel or just as individual files? I would like to later redistribute the changed driver (it is a change in an existing driver I am planning). A package would be great so that users can seamlessly upgrade. > You could disable building and packaging of the kernel > in the debian/rules and control file and only generate a modules > package. Please make sure to also rename the source package and the > generate packages to avoid conflict with the stock kernel. > > For indidivual files just extracting the output of the first solution > could be the simplest approach. OK, I will try - never compiled a kernel using the debian build system :) Many thanks! Cheers nils -- kernel concepts GbRTel: +49-271-771091-12 Sieghuetter Hauptweg 48Fax: +49-271-771091-19 D-57072 Siegen Mob: +49-176-21024535 http://www.kernelconcepts.de ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
Re: N900 kernel module recompile
On 18.02.10 18:18, Nils Faerber wrote: > I would like to hack on some drivers on the N900, so I need to be able > to recompile kernel modules. Ideally I would like only to replace > modules, not the whole kernel+modules package. > > So what I did was I installed the Maemo5 SDK first in order to get the > proper toolchain. > Then I took a vanilla 2.6.28 Linux kernel archive and applied the kernel > patch from "apt-get source kernel" would be easier Do you plan to provide the extra modules as a package in extras-devel or just as individual files? You could disable building and packaging of the kernel in the debian/rules and control file and only generate a modules package. Please make sure to also rename the source package and the generate packages to avoid conflict with the stock kernel. For indidivual files just extracting the output of the first solution could be the simplest approach. -- Thomas Tanner -- email: tan...@gmx.de GnuPG: 1024/5924D4DD ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
N900 kernel module recompile
Hi all! After all that RPM vs DEB debate I thought I could bring up something more productive ;) I would like to hack on some drivers on the N900, so I need to be able to recompile kernel modules. Ideally I would like only to replace modules, not the whole kernel+modules package. So what I did was I installed the Maemo5 SDK first in order to get the proper toolchain. Then I took a vanilla 2.6.28 Linux kernel archive and applied the kernel patch from http://repository.maemo.org/pool/fremantle/free/k/kernel/ kernel_2.6.28-20094803.3+0m5.diff.gz Then I setup my comile environment: export PATH=/scratchbox/compilers/cs2007q3-glibc2.5-arm7/bin/:$PATH export CROSS_COMPILE=arm-none-linux-gnueabi- export ARCH=arm Then kernel config: cp arch/arm/configs/rx51_defconfig ./.config make oldconfig A "make modules" does cleanly compile the modules. Fine so far (except for that te modules are *huge* and a "arm-none-linux-gnueabi-strip -R .not -R .comment --strip-unneeded" seems reasonable). But when I try to load one of the new modules I get: -1 Invalid module format And dmesg shows: "no symbol version for struct_module" This usually means that CONFIG_MODVERSIONS is not set but I double checked that and I do have "CONFIG_MODVERSIONS=y" in ".config". I also changed the extra version name in the kernel toplevel Makefile, which should be correct (to my knowledge): #NAME = Erotic Pickled Herring NAME = maemo There is an older page about recompiling kernel for Diablo in the Wiki: http://wiki.maemo.org/Compiling_the_kenrel Would that still apply (of course replacing Diablo with Freemantle and N810 with N900 or RX51 respectively)? Again, I just want to hack on one single module. So I would like to avoid having to flash a completely home-grown kernel+modules set (frankly that scares me a little ;) Any hint would be really appreciated ;) Some N900 kernel hackers around here? Ideally I would like to make my changes available again so that others can also play with them by just replacing a single .ko-module... Cheers nils -- kernel concepts GbR Tel: +49-271-771091-12 Sieghuetter Hauptweg 48 Fax: +49-271-771091-19 D-57072 Siegen Mob: +49-176-21024535 http://www.kernelconcepts.de ___ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
