Hi
Manish Katiyar wrote:
On Wed, Aug 5, 2009 at 8:44 PM, H M Thalib<hmthalib@xxxxxxxxx> wrote:
Hi Manish,
Manish Katiyar wrote:
On Wed, Aug 5, 2009 at 4:46 PM, Flavio<fbcyborg@xxxxxxxxx> wrote:
2009/8/5 Manish Katiyar <mkatiyar@xxxxxxxxx>:
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.
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