Custom modules on am3517

ozcanhakanzi

Other Parts Discussed in Thread: AM3517

Hi everyone,

I am new at linux. And i have an am3517. I was able to install angstrom and build a filesystem with buildroot.

Now, i have to write and compile custom module. First,

i found a simple hello world example module. But at this example they compile the module with gcc. Bu i have to compile it with angstrom toolchain.

How can i do this ? or is there anyway to do that?

you can find the example here http://tldp.org/HOWTO/Module-HOWTO/x839.html

Thanks in advance,

over 13 years ago

0 gkturner over 13 years ago

TI__Intellectual 1250 points

In the example that you have, the module is being built on an x86 Linux host and it expects to run on that same x86 machine. So if you use the Linux host machine x86 gcc compiler, the module will not run on the Arm. In the angstrom toolchain there should be a cross compiler for compiling Arm modules/applications. You just need to set up your environment so that the call to "gcc" goes to the Arm cross compiler instead of the normal Linux gcc compiler. In the AM3517 SDK there is a cross compiler built in and there is an environment script that sets up the path so that the command "gcc" becomes "arm-arago-linux-gnueabi-gcc". Find your cross-compiler and try issuing the compile command with the full path to the cross-compiler instead of "gcc".

Greg

0 gkturner over 13 years ago in reply to gkturner

TI__Intellectual 1250 points

The AM3517 SDK can be found here:

http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/sdk/AM3517/latest/index_FDS.html

After it is installed, the cross-compile tools will be in a sub-dir called "linux-devkit". There is an environment setup script that will re-direct the "gcc" command to the cross-compiler.

user@laptop:~/ti-sdk-am335x-evm-05.04.00.00/linux-devkit$ ls -l arm-arago-linux-gnueabi/bin/
total 0
lrwxrwxrwx 1 user user 43 2012-02-01 04:41 addr2line -> ../../bin/arm-arago-linux-gnueabi-addr2line
lrwxrwxrwx 1 user user 36 2012-02-01 04:41 ar -> ../../bin/arm-arago-linux-gnueabi-ar
lrwxrwxrwx 1 user user 36 2012-02-01 04:41 as -> ../../bin/arm-arago-linux-gnueabi-as
lrwxrwxrwx 1 user user 37 2012-02-01 04:41 cc -> ../../bin/arm-arago-linux-gnueabi-gcc
lrwxrwxrwx 1 user user 41 2012-02-01 04:41 c++filt -> ../../bin/arm-arago-linux-gnueabi-c++filt
lrwxrwxrwx 1 user user 37 2012-02-01 04:41 cpp -> ../../bin/arm-arago-linux-gnueabi-cpp
lrwxrwxrwx 1 user user 37 2012-02-01 04:41 g++ -> ../../bin/arm-arago-linux-gnueabi-g++
lrwxrwxrwx 1 user user 37 2012-02-01 04:41 gcc -> ../../bin/arm-arago-linux-gnueabi-gcc
lrwxrwxrwx 1 user user 40 2012-02-01 04:41 gccbug -> ../../bin/arm-arago-linux-gnueabi-gccbug
lrwxrwxrwx 1 user user 38 2012-02-01 04:41 gcov -> ../../bin/arm-arago-linux-gnueabi-gcov
lrwxrwxrwx 1 user user 39 2012-02-01 04:41 gprof -> ../../bin/arm-arago-linux-gnueabi-gprof
lrwxrwxrwx 1 user user 36 2012-02-01 04:41 ld -> ../../bin/arm-arago-linux-gnueabi-ld
lrwxrwxrwx 1 user user 36 2012-02-01 04:41 nm -> ../../bin/arm-arago-linux-gnueabi-nm
lrwxrwxrwx 1 user user 41 2012-02-01 04:41 objcopy -> ../../bin/arm-arago-linux-gnueabi-objcopy
lrwxrwxrwx 1 user user 41 2012-02-01 04:41 objdump -> ../../bin/arm-arago-linux-gnueabi-objdump
lrwxrwxrwx 1 user user 40 2012-02-01 04:41 ranlib -> ../../bin/arm-arago-linux-gnueabi-ranlib
lrwxrwxrwx 1 user user 41 2012-02-01 04:41 readelf -> ../../bin/arm-arago-linux-gnueabi-readelf
lrwxrwxrwx 1 user user 38 2012-02-01 04:41 size -> ../../bin/arm-arago-linux-gnueabi-size
lrwxrwxrwx 1 user user 41 2012-02-01 04:41 strings -> ../../bin/arm-arago-linux-gnueabi-strings
lrwxrwxrwx 1 user user 39 2012-02-01 04:41 strip -> ../../bin/arm-arago-linux-gnueabi-strip
user@laptop:~/ti-sdk-am335x-evm-05.04.00.00/linux-devkit$ ls
arm-arago-linux-gnueabi bin environment-setup etc i686-linux include lib libexec mkspecs README share site-config usr version
user@laptop:~/ti-sdk-am335x-evm-05.04.00.00/linux-devkit$

0 Anil over 13 years ago in reply to gkturner

TI__Expert 6655 points

Hi Hakan,

Below post have the details on how test application can be build (cross compile) as module

http://e2e.ti.com/support/embedded/linux/f/354/t/156496.aspx#567559

Regards

AnilKumar

Please mark this Forum post as answered via the Verify Answer button below if it helps answer your question. Thanks!

0 ozcanhakanzi over 13 years ago in reply to Anil

Prodigy 200 points

Thanks Anil,

But i have some problems with my tool-chain prefix.

i have create the make file

obj-m += hello.o
/home/developer/workdir/Angstrom/angstrom/arm
all:
 make -C /home/developer/Desktop/xukr-20120201-omap3/linux-2.6.37-tn M=/home/developer/Desktop/module_test ARCH=arm CROSS_COMPILE=angstrom-linux-gnueabi- modules

clean:
 make -C /home/developer/Desktop/xukr-20120201-omap3/linux-2.6.37-tn M=/home/developer/Desktop/module_test clean

But when i give the "make" command, it says

/bin/sh: angstrom-linux-gnueabi-gcc: not found

am i missing something ? i am really new at this, sorry for that.

Thanks,

0 Anil over 13 years ago in reply to ozcanhakanzi

TI__Expert 6655 points

Hi Hakan,

Add tool chain installation path to PATH

export PATH=/opt/arago/arago-2011.09/armv7a/bin/:$PATH

Or you can add to ~/.bashrc file (From next login onwards it will export the path).

cd /home/developer/Desktop/module_test

vi Makefile (add obj-m += hello.o)

Then issue this command for compilation
make -C /home/developer/Desktop/xukr-20120201-omap3/linux-2.6.37-tn
M=$PWD ARCH=arm CROSS_COMPILE=angstrom-linux-gnueabi-

To run the module, at command prompt:

$ insmod hello.ko

Regards

AnilKumar

Please mark this Forum post as answered via the Verify Answer button below if it helps answer your question. Thanks!

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Custom modules on am3517