Re: [uml-user] Compiling modules on UML
Hi Manish Katiyar wrote: > On Wed, Aug 5, 2009 at 8:44 PM, H M Thalib wrote: >> Hi Manish, >> >> Manish Katiyar wrote: >>> On Wed, Aug 5, 2009 at 4:46 PM, Flavio wrote: 2009/8/5 Manish Katiyar : > My question is how do people build modules which are specific to a > particular architecture on UML ? Is it possible ? Sure! Are you compiling the kernel modules from the host system? If not, try to do it. The exact procedure is the following: # mount -o loop rootfs loop_dir/ # cd /uml/src/linux # make modules ARCH=um # make modules_install INSTALL_MOD_PATH=/uml/loop_dir ARCH=um # umount /uml/loop_dir Then, boot the UML again. >>> Hi Flavio, >>> >>> I have done that step and my UML kernel boots fine. My question is in >>> UML environment what will the ARCH resolve to ? will it be um or x86 ? >>> >>> Thanks - >>> Manish >>> >>> Flavio >>> >>> >> It will um. Actualy UML is a port of the Linux kernel as a normal Intel >> Linux process. > > So that would mean that any new kernel module that I compile has to be > prefixed with ARCH=um ??? because my kernel source resides on host and > has been configured as um. If I compile any x86 module from UML it > will fail because the asm directory in kernel source points to asm-um > and not asm-x86. Isn't it ?? Or I am just talking senseless :-( ... > Yes, When you compile don't forget to specify the ARCH=um. If you didn't specify the ARCH then kernel build system will configure it for the host/development system mostly your x86 PC. Mostly it modules should fail. but I am not sure. > Below is how my directory structures look like. > > -bash-3.2# ls -l /lib/modules/2.6.30.4/source/include/ > total 120 > -rw-r--r-- 1 mkatiyar 5573 218 Jul 30 18:34 Kbuild > drwxr-xr-x 3 mkatiyar 5573 4096 Jul 30 18:34 acpi > lrwxrwxrwx 1 mkatiyar 5573 6 Aug 5 06:16 asm -> asm-um > > -bash-3.2# ls -l /lib/modules/2.6.30.4/ > total 64 > lrwxrwxrwx 1 root root 42 Aug 4 13:36 build -> > /home/mkatiyar/personal/uml/linux-2.6.30.4 > drwxr-xr-x 6 root root 4096 Aug 5 06:18 kernel > -rw-r--r-- 1 root root 265 Aug 5 11:01 modules.alias > .. > ... > -rw-r--r-- 1 root root 189 Aug 5 11:01 modules.usbmap > lrwxrwxrwx 1 root root 42 Aug 5 06:18 source -> > /home/mkatiyar/personal/uml/linux-2.6.30.4 > > -bash-3.2# ls -l /home/mkatiyar > total 0 > lrwxrwxrwx 1 root root 32 Aug 4 14:48 personal -> > /mnt/host/home/mkatiyar/personal > > > -bash-3.2# mount > /dev/ubda on / type auto (rw) > none on /proc type proc (rw) > none on /dev/pts type devpts (rw,gid=5,mode=620) > none on /mnt/host type hostfs (rw) > > > Thanks - > Manish > > > >> -- >> Thanks & Regards, >> H M Thalib. >> > > > -- Thanks & Regards, H M Thalib. -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
Re: [uml-user] Compiling modules on UML
On Wed, Aug 5, 2009 at 8:44 PM, H M Thalib wrote: > Hi Manish, > > Manish Katiyar wrote: >> >> On Wed, Aug 5, 2009 at 4:46 PM, Flavio wrote: >>> >>> 2009/8/5 Manish Katiyar : My question is how do people build modules which are specific to a particular architecture on UML ? Is it possible ? >>> >>> Sure! >>> Are you compiling the kernel modules from the host system? If not, >>> try to do it. >>> The exact procedure is the following: >>> # mount -o loop rootfs loop_dir/ >>> # cd /uml/src/linux >>> # make modules ARCH=um >>> # make modules_install INSTALL_MOD_PATH=/uml/loop_dir ARCH=um >>> # umount /uml/loop_dir >>> >>> Then, boot the UML again. >> >> Hi Flavio, >> >> I have done that step and my UML kernel boots fine. My question is in >> UML environment what will the ARCH resolve to ? will it be um or x86 ? >> >> Thanks - >> Manish >> >> >>> Flavio >>> >> >> >> > > It will um. Actualy UML is a port of the Linux kernel as a normal Intel > Linux process. So that would mean that any new kernel module that I compile has to be prefixed with ARCH=um ??? because my kernel source resides on host and has been configured as um. If I compile any x86 module from UML it will fail because the asm directory in kernel source points to asm-um and not asm-x86. Isn't it ?? Or I am just talking senseless :-( ... Below is how my directory structures look like. -bash-3.2# ls -l /lib/modules/2.6.30.4/source/include/ total 120 -rw-r--r-- 1 mkatiyar 5573 218 Jul 30 18:34 Kbuild drwxr-xr-x 3 mkatiyar 5573 4096 Jul 30 18:34 acpi lrwxrwxrwx 1 mkatiyar 5573 6 Aug 5 06:16 asm -> asm-um -bash-3.2# ls -l /lib/modules/2.6.30.4/ total 64 lrwxrwxrwx 1 root root 42 Aug 4 13:36 build -> /home/mkatiyar/personal/uml/linux-2.6.30.4 drwxr-xr-x 6 root root 4096 Aug 5 06:18 kernel -rw-r--r-- 1 root root 265 Aug 5 11:01 modules.alias .. ... -rw-r--r-- 1 root root 189 Aug 5 11:01 modules.usbmap lrwxrwxrwx 1 root root 42 Aug 5 06:18 source -> /home/mkatiyar/personal/uml/linux-2.6.30.4 -bash-3.2# ls -l /home/mkatiyar total 0 lrwxrwxrwx 1 root root 32 Aug 4 14:48 personal -> /mnt/host/home/mkatiyar/personal -bash-3.2# mount /dev/ubda on / type auto (rw) none on /proc type proc (rw) none on /dev/pts type devpts (rw,gid=5,mode=620) none on /mnt/host type hostfs (rw) Thanks - Manish > > -- > Thanks & Regards, > H M Thalib. > -- Thanks - Manish -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
Re: [uml-user] Compiling modules on UML
Hi Manish, Manish Katiyar wrote: > On Wed, Aug 5, 2009 at 4:46 PM, Flavio wrote: >> 2009/8/5 Manish Katiyar : >>> My question is how do people build modules which are specific to a >>> particular architecture on UML ? Is it possible ? >> Sure! >> Are you compiling the kernel modules from the host system? If not, >> try to do it. >> The exact procedure is the following: >> # mount -o loop rootfs loop_dir/ >> # cd /uml/src/linux >> # make modules ARCH=um >> # make modules_install INSTALL_MOD_PATH=/uml/loop_dir ARCH=um >> # umount /uml/loop_dir >> >> Then, boot the UML again. > > Hi Flavio, > > I have done that step and my UML kernel boots fine. My question is in > UML environment what will the ARCH resolve to ? will it be um or x86 ? > > Thanks - > Manish > > >> Flavio >> > > > It will um. Actualy UML is a port of the Linux kernel as a normal Intel Linux process. -- Thanks & Regards, H M Thalib. -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
Re: [uml-user] Compiling modules on UML
2009/8/5 Manish Katiyar : > Hi Flavio, > > I have done that step and my UML kernel boots fine. My question is in > UML environment what will the ARCH resolve to ? will it be um or x86 ? ARCH will be "um", but you can choose a subarch type in your kernel config. Flavio -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
Re: [uml-user] Compiling modules on UML
Manish, On Wed, Aug 5, 2009 at 3:54 PM, Manish Katiyar wrote: > Hi, > > I am trying to compile a module on UML. The kernel with which I am > booting UML is my custom kernel built on i386 machine with the command > line as "make defconfig ARCH=um; make linux ARCH=um". After the kernel > boots up my uname shows something like below :- > > bash-3.2# uname -a > Linux localhost.localdomain 2.6.30.4 #6 Wed Aug 5 15:12:08 IST 2009 > i686 i686 i386 GNU/Linux > > Now when I compile a module, by default it resolves the ARCH to x86. > And some of the compilation fails because somethings are expected to > be always defined on x86 but not on UML (e.g. > CONFIG_TRACE_IRQFLAGS_SUPPORT). because my asm directory resolves to > asm-um rather than asm-x86. It throws error like below. > > In file included from include/linux/prefetch.h:14, > from include/linux/list.h:6, > from include/linux/wait.h:22, > from include/linux/fs.h:359, > from include/linux/buffer_head.h:11, > from /home/mkatiyar/personal/ohsm/test/kernel/admin.c:23: > /mnt/host/home/mkatiyar/personal/uml/linux-2.6.30.4/arch/x86/include/asm/processor.h: > In function 'load_cr3': > /mnt/host/home/mkatiyar/personal/uml/linux-2.6.30.4/arch/x86/include/asm/processor.h:191: > error: 'CONFIG_PAGE_OFFSETUL' undeclared (first use in this function) > /mnt/host/home/mkatiyar/personal/uml/linux-2.6.30.4/arch/x86/include/asm/processor.h:191: > error: (Each undeclared identifier is reported only once > /mnt/host/home/mkatiyar/personal/uml/linux-2.6.30.4/arch/x86/include/asm/processor.h:191: > error: for each function it appears in.) > /mnt/host/home/mkatiyar/personal/uml/linux-2.6.30.4/arch/x86/include/asm/processor.h: > In function 'wbinvd_halt': > /mnt/host/home/mkatiyar/personal/uml/linux-2.6.30.4/arch/x86/include/asm/processor.h:771: > error: implicit declaration of function 'halt' > > > My question is how do people build modules which are specific to a > particular architecture on UML ? Is it possible ? > > Once I export ARCH=um before doing a make, I can do a successful build. > I think its documented somewhere on the UML website that you have to provide ARCH=um for any compilation/build related things. > -- > Thanks - > Manish > > -- > To unsubscribe from this list: send an email with > "unsubscribe kernelnewbies" to ecar...@nl.linux.org > Please read the FAQ at http://kernelnewbies.org/FAQ > > -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
Re: [uml-user] Compiling modules on UML
On Wed, Aug 5, 2009 at 4:46 PM, Flavio wrote: > 2009/8/5 Manish Katiyar : >> My question is how do people build modules which are specific to a >> particular architecture on UML ? Is it possible ? > Sure! > Are you compiling the kernel modules from the host system? If not, > try to do it. > The exact procedure is the following: > # mount -o loop rootfs loop_dir/ > # cd /uml/src/linux > # make modules ARCH=um > # make modules_install INSTALL_MOD_PATH=/uml/loop_dir ARCH=um > # umount /uml/loop_dir > > Then, boot the UML again. Hi Flavio, I have done that step and my UML kernel boots fine. My question is in UML environment what will the ARCH resolve to ? will it be um or x86 ? Thanks - Manish > > Flavio > -- Thanks - Manish -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
Re: [uml-user] Compiling modules on UML
2009/8/5 Manish Katiyar : > My question is how do people build modules which are specific to a > particular architecture on UML ? Is it possible ? Sure! Are you compiling the kernel modules from the host system? If not, try to do it. The exact procedure is the following: # mount -o loop rootfs loop_dir/ # cd /uml/src/linux # make modules ARCH=um # make modules_install INSTALL_MOD_PATH=/uml/loop_dir ARCH=um # umount /uml/loop_dir Then, boot the UML again. Flavio -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
