IMX6 GDB debugging

john_smith — Tue, 22 Aug 2017 12:41:12 GMT

Hello!

I'm using GDB to debug programs in such a way:

1. Establish ethernet connection between the board and the PC.

2. Run command

gdbserver :1234 myApp

on board

3. Run

arm-none-eabi-gdb myApp

on PC

4. Run

target remote board_IP:1234

on PC

After that the debugging session is started.

Now I'm intersted - is there a way to debug running linux kernel with GDB?

I can use command:

arm-none-eabi-gdb vmlinux

at step 3.

But what command should be executed in order to start gdbserver on board?

Thank you in advance!

Re: IMX6 GDB debugging

Carlos_Musich — Tue, 29 Aug 2017 17:46:38 GMT

Hi John,

it is not necessary you just need to build kernel with CONFIG_DEBUG_INFO=y option

======================= GDB ==================

cd /sys/devices/system/cpu/cpu0/cpuidle/state1

echo 1 > /sys/devices/system/cpu/cpu0/cpuidle/state1/disable

sudo JLinkGDBServer -if JTAG -endian little -device MCIMX6L8 -select USB -noir -noreset

CONFIG_DEBUG_INFO=y # this will compile in debugging symbols and info

$ gdb-[CROSS-COMPILE] /path/to/linux/build/vmlinux

Regards,
Carlos

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