[etherlab-users] insmod error - unknown symbol

[Thomas Specker]

Hello,

I try to build a kernel module with Etherlab and Matlab/Simulink, but I have
some problems with it.
I can build a module, but I get an error trying insmod it.

I checked the compiler versions, but they seem to match.

While the build is running I get different errors and warnings.

The first error looks like that....

gmake[1]: Betrete Verzeichnis '/usr/src/linux-2.6.28.7'
test -e include/linux/autoconf.h -a -e include/config/auto.conf || (        \
    echo;                                \
    echo "  ERROR: Kernel configuration is invalid.";        \
    echo "         include/linux/autoconf.h or include/config/auto.conf are
missing.";    \
    echo "         Run 'make oldconfig && make prepare' on kernel src to fix
it.";    \
    echo;                                \
    /bin/false)

I have no idea why the KERNEL configuration should be invalid, the rtai-kernel
is running fine,
ethercat is running and I can also load the ethercat-rtai-example-module.
autoconf.h and auto.conf are both in the expectet directories.

then I get a lot of warnings....

WARNING: "ecrt_master_receive"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_create_domain"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_version_magic"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_send"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_domain_queue"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_slave_config_sdo16"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_sync_slave_clocks"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_slave_config_sdo32"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_send_ext"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_application_time"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_slave_config_reg_pdo_entry"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_domain_process"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_domain_state"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_callbacks"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_state"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_slave_config"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_slave_config_dc"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_slave_config_idn"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_slave_config_pdos"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_sync_reference_clock"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_domain_external_memory"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_domain_size"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_master_activate"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_release_master"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_request_master"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: "ecrt_slave_config_sdo8"
[/opt/etherlab/rtw/etherlab/etherlab_test_etl_rtw/etherlab_test_kmod.ko]
undefined!
WARNING: modpost: Found 6 section mismatch(es).

But as I read in the mail archive that should be no Problem at all.

When I try to insmod the new kernel module I get...

>insmod etherlab_test_kmod.ko
insmod: error inserting 'etherlab_test_kmod.ko': -1 Unknown symbol in module

dmesg says...

[ 3778.154227] etherlab_test_kmod: Unknown symbol stop_rt_app
[ 3778.155568] etherlab_test_kmod: Unknown symbol rt_var_exit
[ 3778.167379] etherlab_test_kmod: Unknown symbol start_rt_app

I have no idea what I could do and would be very thankful for all kinds of help.

Thomas
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