Rebuilding a kernel module(driver) with debugging












1















I have been trying for the past day to rebuild my iwlwifi modules with debugging enabled. The way to do this is to build with the .config param CONFIG_IWLWIFI_DEBUG=y. If I was building a new kernel this would be easy, but I want to keep using the installed ubuntu kernel. At the moment I don’t care about installing the modules. I just want to see the .ko files build, insmod them, and check for /sys/modules/iwlwifi/parameters/debug which should exist if the modules are built for debugging. What’s the official ubuntu way of doing this?



So far, this is what I’m doing:



My kernel is 4.15.0-43-generic, headers are already installed in /usr/src/linux-headers-4.15.0-43-generic




  1. Installed /usr/src/linux-source-4.15.0 with apt-get and unpacked it to ~/


  2. Set CONFIG_IWLWIFI_DEBUG=y in ~/linux-4.15.0/.config and /usr/src/linux-headers-4.15.0-43-generic/.config because I’m not sure which would be used.


  3. In ~/linux-4.15.0/drivers/net/.../iwlwifi, I run make -C /lib/modules/$(uname -r)/build M=$(pwd) modules


  4. ko modules build, but they aren’t debug-enabled











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    I have been trying for the past day to rebuild my iwlwifi modules with debugging enabled. The way to do this is to build with the .config param CONFIG_IWLWIFI_DEBUG=y. If I was building a new kernel this would be easy, but I want to keep using the installed ubuntu kernel. At the moment I don’t care about installing the modules. I just want to see the .ko files build, insmod them, and check for /sys/modules/iwlwifi/parameters/debug which should exist if the modules are built for debugging. What’s the official ubuntu way of doing this?



    So far, this is what I’m doing:



    My kernel is 4.15.0-43-generic, headers are already installed in /usr/src/linux-headers-4.15.0-43-generic




    1. Installed /usr/src/linux-source-4.15.0 with apt-get and unpacked it to ~/


    2. Set CONFIG_IWLWIFI_DEBUG=y in ~/linux-4.15.0/.config and /usr/src/linux-headers-4.15.0-43-generic/.config because I’m not sure which would be used.


    3. In ~/linux-4.15.0/drivers/net/.../iwlwifi, I run make -C /lib/modules/$(uname -r)/build M=$(pwd) modules


    4. ko modules build, but they aren’t debug-enabled











    share|improve this question

























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      1








      I have been trying for the past day to rebuild my iwlwifi modules with debugging enabled. The way to do this is to build with the .config param CONFIG_IWLWIFI_DEBUG=y. If I was building a new kernel this would be easy, but I want to keep using the installed ubuntu kernel. At the moment I don’t care about installing the modules. I just want to see the .ko files build, insmod them, and check for /sys/modules/iwlwifi/parameters/debug which should exist if the modules are built for debugging. What’s the official ubuntu way of doing this?



      So far, this is what I’m doing:



      My kernel is 4.15.0-43-generic, headers are already installed in /usr/src/linux-headers-4.15.0-43-generic




      1. Installed /usr/src/linux-source-4.15.0 with apt-get and unpacked it to ~/


      2. Set CONFIG_IWLWIFI_DEBUG=y in ~/linux-4.15.0/.config and /usr/src/linux-headers-4.15.0-43-generic/.config because I’m not sure which would be used.


      3. In ~/linux-4.15.0/drivers/net/.../iwlwifi, I run make -C /lib/modules/$(uname -r)/build M=$(pwd) modules


      4. ko modules build, but they aren’t debug-enabled











      share|improve this question














      I have been trying for the past day to rebuild my iwlwifi modules with debugging enabled. The way to do this is to build with the .config param CONFIG_IWLWIFI_DEBUG=y. If I was building a new kernel this would be easy, but I want to keep using the installed ubuntu kernel. At the moment I don’t care about installing the modules. I just want to see the .ko files build, insmod them, and check for /sys/modules/iwlwifi/parameters/debug which should exist if the modules are built for debugging. What’s the official ubuntu way of doing this?



      So far, this is what I’m doing:



      My kernel is 4.15.0-43-generic, headers are already installed in /usr/src/linux-headers-4.15.0-43-generic




      1. Installed /usr/src/linux-source-4.15.0 with apt-get and unpacked it to ~/


      2. Set CONFIG_IWLWIFI_DEBUG=y in ~/linux-4.15.0/.config and /usr/src/linux-headers-4.15.0-43-generic/.config because I’m not sure which would be used.


      3. In ~/linux-4.15.0/drivers/net/.../iwlwifi, I run make -C /lib/modules/$(uname -r)/build M=$(pwd) modules


      4. ko modules build, but they aren’t debug-enabled








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      asked 9 hours ago









      zallikzallik

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