Home/Support/Support Forum/cmdline for enableing core dump
Welcome to Digi Forum, where you can ask questions and receive answers from other members of the community.

cmdline for enableing core dump

0 votes
I have imx6ul sbc connector board running kernel version 4.1.39-dey+gf1810a3
Currently the cmdline:
console=ttymxc4 cma=96M mtdparts=gpmi-nand:3m(bootloader), ... rootfstype=ubifs rw quiet

I am not sure to add something like crashkernel=50M rootwait etc. to enable core dump for debugging program crashing.

Or some other ways or tools for crashing debugging?

Thank you,

asked Jan 13, 2021 in Linux by dzhou New to the Community (7 points)

Please log in or register to answer this question.

1 Answer

0 votes
please take a look at this page:
it should answer your question
answered Jan 14, 2021 by LeonidM Veteran of the Digi Community (4,457 points)
Hi Leonid,

Thank you for your answer and help.
I have generated a core file, but for imx6ul, how to analyze the core file. It seems to me that it needs gdb executable, but I found no gdb program under sysroots/x86_64. Is there a configuration that needs to be bitbaked?

Best Regards,

I found arm-dey-linux-gnueabi-gdb under the sysroots

Hi David,
Yes, that's the one.
Hi Leonid,
I found that the binary executable has to be built in debug. If it is release build without debug info, the gdb shows nothing from the core dump file.
Or I missed something.
The debug build makes executable very big, and there no room or space to dump core.
I am not sure there is a workaround.
Thank you,
do not boot from flash, use TFP/NFS instead, then your rootfs will be a folder on your host Ubuntu