Generating coredump and saving into flash, Is there is any proper steps are there?

Question

I am following the document provided for generating core dump . I follow the step 
 1. after enable all the config, i am able to do coredump find , coredump verify, coredump print. 
 2. I copied the serial logs and and save as the coredump.log 
 3. i am able to convert the coredump.log to coredump.bin using 1st command shown in the screenshot. 
 4. I have tried the 2 nd command for this i am getting the waiting for the gdb connection port.Do i need to do something else here? 
 
 5. I have tried 3 rd command gdb server is opening but for the after firing the 4 th command i am able to open the port using target remote localhost:2331. 
 6. when i connecting server i did bt but all files it showing for the sdk so not able to understand from where program got crash. Do i need to 2 nd command and not 3 rd one ? 
 And why we are converting the coredump.log to coredump. bin and where we are using those files? 
 please help me with this is i miss any steps in between. Some example code is there of this? i am referring this nordic ticket https://devzone.nordicsemi.com/f/nordic-q-a/101071/saving-coredumps-to-external-flash/448143

helsing · Answer

In step 4. try using arm-zephyr-eabi-gdb not the x86 variant. 
 5. I have tried 3 rd command gdb server is opening but for the after firing the 4 th command i am able to open the port using target remote localhost:2331. 
 I suppose yyu should try to connect to port 1234. Your GDB server is waiting for a connection on 1234 while you in your client are trying to connect to port 2331. 
 May I ask what you will be using the core dump for? You will be getting a lot of data from a core dump while a crashlog from fault handler often is just as useful.