On 02/21/2013 09:55 AM, Ajith Adapa wrote:
Yeah I agree .. But seems our client is using a customized Make
script. So I disabled CONFIG_DYNAMIC_DEBUG option which is a kind of
temporary hack to my previous issue.
But the Make script follows following steps
1. Create .o for all .c files
2. Create final module.o with all the above .o files
A correct, normal Makefile for external modules does the above
2 steps and then the kernel build handles the rest of it.
3. Using modpost create Module.markers
/lib/modules/2.6.32.58/source/scripts/mod/modpost -i
/lib/modules/2.6.32.58/source/Module.symvers -S -K
/lib/modules/2.6.32.58/source/Module.markers -M ../l2/Module.markers
../l2/l2_module.o
I guess this step creates modulename.mod.c file
4. Now create modulename.mod.o file
5. Finally link up everything creating .ko file.
Above steps works great with 2.6.32 kernel but When I am trying on 3.7
kernel Step-3 doesn't return anything other than Error 1 at the end.
Seems Modpost is one tough nut to crack as it has doesnt have any
options or debug logs to display its output status.
I thought I will create modpost with -g option enabled to run the GDB
over it to see why it fails.
Is there any doc or wiki page where we can understand different steps
involved in the creation of a .ko file right from step 1 ?
Regards,
Ajith
--------------------------------------------
codingfreak.blogspot.com
On Thu, Feb 21, 2013 at 10:22 PM, Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote:
On 02/21/13 04:15, Ajith Adapa wrote:
Hi,
I am again hit with KBUILD issue which says as shown below
/home/tmp/linux-26/include/net/inet_connection_sock.h: In function
‘inet_csk_clear_xmit_timer’:
/home/tmp/linux-26/include/net/inet_connection_sock.h:203:3: error:
‘KBUILD_MODNAME’ undeclared (first use in this function)
/home/tmp/linux-26/include/net/inet_connection_sock.h:203:3: note:
each undeclared identifier is reported only once for each function it
appears in
/home/tmp/linux-26/include/net/inet_connection_sock.h: In function
‘inet_csk_reset_xmit_timer’:
/home/tmp/linux-26/include/net/inet_connection_sock.h:219:3: error:
‘KBUILD_MODNAME’ undeclared (first use in this function)
Ideally my understanding is When a module is build KBUILD_MODNAME is
automatically updated.
But I even tried options like -D"KBUILD_MODNAME=KBUILD_STR(l2_module)"
/usr/bin/gcc -M -g -O2 -DMODULE
-D"KBUILD_MODNAME=KBUILD_STR(l2_module)" -D__KERNEL__ -DLINUX
-fno-strict-aliasing -fno-common -ffreestanding -O2 -m32
-fomit-frame-pointer -g -pipe -msoft-float
-mpreferred-stack-boundary=2 -fno-unit-at-a-time -march=i686
-mtune=pentium4 -mregparm=3 -I/lib/modules/3.7.6.1.i686/source
/include -I/lib/modules/3.7.6.1.i686/source/arch/x86/include
-I/lib/modules/3.7.6.1.i686/source/include
-I/lib/modules/3.7.6.1.i686/source/include2
-I/lib/modules/3.7.6.1.i686/source/include/asm/mach-default
-I/lib/modules/3.7.6.1.i686/source/include2/asm/mach-default
-I/lib/modules/3.7.6.1.i686/source/include/uapi
-I/lib/modules/3.7.6.1.i686/source/include/linux/kconfig.h
-I/lib/modules/3.7.6.1.i686/source/include/generated/uapi
-I/lib/modules/3.7.6.1.i686/source/arch/x86/include/generated/uapi
-m32 tmp/l2.c
/lib/modules/3.7.6.1.i686/source/include/net/inet_connection_sock.h:203:3:
error: ‘l2_module’ undeclared (first use in this function)
It says it is undeclared.
Anybody have any clue what I messed up this time ? Thanks for the last reply
The official, expected way to build any (external) kernel module is to use a Makefile
for the module and run 'make', e.g.:
$ make -C /path/to/kernel/source M=/path/to/module/source [O=/path/to/kernel/build] modules
That should work. If not, let us know.
--
~Randy
--
~Randy
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