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Linux Kernel debug by CCS for AM3874

Kzk
Genius 5785 points
Other Parts Discussed in Thread: AM3874

Hello,

I'd like to debug linux kernel of AM3874 by CCS stop mode debug. I confirmed that the processing stops at __init ti8148_evm_init function in board-ti8148evm.c by Hardware breakpoint.

/ti-ezsdk_dm814x-evm_5_04_00_11/board-support/linux-2.6.37-psp04.04.00.01/arch/arm/mach-omap2/board-ti8148evm.c

But, I can't execute Step Into and Step Over using CCS operation. It seems that program counter is changing, but CCS can not trace C source code. Then if I execute resume, Kernel boots up correctly.

I've ever been successful for stop mode debug of AM335x EZSDKv6. I made uImage by following steps.

# cd /home/user/ti-ezsdk_dm814x-evm_5_04_00_11/board-support/linux-2.6.37-psp04.04.00.01
# make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- mrproper
# make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm ti8148_evm_defconfig
# make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm menuconfig

check: Kernel hacking -> Kernel debugging
check: Kernel hacking -> Compile the kernel with debug info
Exit -> Exit -> (Save)Yes

# make CROSS_COMPILE=arm-none-linux-gnueabi- ARCH=arm uImage

Best regards

  • 0
    TI__Guru**** 170625 points

    Hi Kazu,

    Kazu Kon said:

    /ti-ezsdk_dm814x-evm_5_04_00_11/board-support/linux-2.6.37-psp04.04.00.01/arch/arm/mach-omap2/board-ti8148evm.c

    But, I can't execute Step Into and Step Over using CCS operation. It seems that program counter is changing, but CCS can not trace C source code.

    Do you open/load the board-ti8148evm.c file into the CCS view/window? File -> Open File -> board-ti8148evm.c

    Kazu Kon said:
    # make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- mrproper

    What is this step for? Can you try without it.

    http://processors.wiki.ti.com/index.php/TI81XX_PSP_User_Guide#Linux_Kernel

    BR
    Pavel

  • 0 in reply to Pavel Botev
    Genius 5785 points

    Hi Pavel

    Thank you for your advice. I opened board-ti8148evm.c using Project Explorer. I stop typing command line for mrproper. But it's not working. I referred following web site incidentally.
    http://processors.wiki.ti.com/index.php/Sitara_Linux_Training:_uboot_linux_debug_with_ccsv5#Lab_Steps_6

    Is it OK if I use builder for arm-none-linux-gnueabi (NOT arm-arago-linux-gnueabi)?
    http://processors.wiki.ti.com/index.php/DM814x_AM387x_PSP_User_Guide#Linux_Kernel

    Regards,
    Kazu

  • 0 in reply to Kzk
    TI__Guru**** 170625 points

    Hi Kazu,

    Kazu Kon said:
    http://processors.wiki.ti.com/index.php/Sitara_Linux_Training:_uboot_linux_debug_with_ccsv5#Lab_Steps_6

    This is for AM335x device. For AM387x device it should be similar.

    Kazu Kon said:
    Is it OK if I use builder for arm-none-linux-gnueabi (NOT arm-arago-linux-gnueabi)?
    http://processors.wiki.ti.com/index.php/DM814x_AM387x_PSP_User_Guide#Linux_Kernel

    Yes, arm-none-linux-gnueabi is correct.

    Regards
    Pavel

  • 0 in reply to Pavel Botev
    Genius 5785 points

    Hi Pavel,

    Thanks, I understand. I forgot to enable "Enable Stack unwinding support" in menuconfig. Now, it's working. Thank you for reminding me this thing.

    Regards,
    Kazu