Author Topic: No Breakpoints, No Call-Stack, No Disassambly with openOCD & arm-gdb  (Read 191 times)

Offline duderino65

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I have some problems when debugging my cortex-m firmware. I can start the session and connect with arm-none-eabi-gdb to my Target with Codeblocks. I can start and halt the Target. But when I halt, I can not see any Call-Stack or Disassambly. Also Target gets not halted on breakpoints. I think Codeblocks can't even set them properly on the target.

My Setup:
I'm starting a openOCD Session for an STM32F469 with Segger JLINK (replaced STM32F469IDiscovery ST-Link FW with Firmware from Segger). This works I think and I don't get errors.

This is the Output:
stderr> Open On-Chip Debugger 0.10.0
stderr> Licensed under GNU GPL v2
stderr> For bug reports, read
stderr> swd
stderr> adapter speed: 2000 kHz
stderr> adapter_nsrst_delay: 100
stderr> none separate
stderr> cortex_m reset_config sysresetreq
stderr> Info : J-Link STLink V21 compiled Dec 21 2016 15:10:59
stderr> Info : Hardware version: 1.00
stderr> Info : VTarget = 3.300 V
stderr> Info : clock speed 2000 kHz
stderr> Info : SWD DPIDR 0x2ba01477
stderr> Info : stm32f4x.cpu: hardware has 6 breakpoints, 4 watchpoints
stdout> /opt/armcc_504u2/bin:/opt/armcc_504u2/bin/bin:/opt/arm-none-eabi-5_2-2016q1-20160125/bin:/opt/arm-none-eabi-5_2-2016q1-20160125/bin/bin:/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
stdout> Target  CPU1
stdout> GDB Port  23331
stdout> Telnet Port  24441
stdout> TCL Port  26661
stdout> jlink_CPU1.cfg

After my Build is ready I start a debug session. I this is my debugger config:

localhost 23331

After connection:

monitor reset halt
file ../Output/OutputARM/sciopta_armcpu1/sciopta_armcpu1.elf
mon flash write_image erase ../Output/OutputARM/sciopta_armcpu1/sciopta_armcpu1.elf
monitor halt

This is the Output when arm-none-eabi-gdb starts:

Starting debugger: /opt/arm-none-eabi-5_2-2016q1-20160125/bin/arm-none-eabi-gdb -nx -fullname -quiet  -args /home/user/workspace/stm32f469i_sciopta/stm32f469i_sciopta_keil_demo/Output/OutputARM/sciopta_armcpu1/sciopta_armcpu1
Registered new type: wxString
Registered new type: STL String
Registered new type: STL Vector
Connecting to remote target
Setting breakpoints
Debugger name and version: GNU gdb (GNU Tools for ARM Embedded Processors (with big-endian patch))
In ?? () ()
Failure finding "Stack level "
Failure matching reg_output

Whan I start my target it runs, and if I halt it I get following output but my target stops:

Trying to interrupt process with pid: 30202; child pid: 0 gdb pid: 30202
Program received signal SIGINT, Interrupt.
In ?? () ()
Failure finding "Stack level "
Failure matching reg_output

I don't know why it does not work anymore. When I set it up it worked just fine. I could do breakpoints and see the callstack. But now it is not working.
I have to say, that I tried several debug configs. Recently I added the "flash write_image" command because I couldn't write FW to Target.

Does anybody have an idea what is wrong with my config here?

Kind regards

« Last Edit: May 05, 2017, 10:12:54 am by duderino65 »

Offline duderino65

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  • Posts: 7
Hi again,

that's crazy! As the most times the problem is very small :).

Short: My Path for gdb command "file" is wrong.

I didn't notice that Codeblocks Working Directory and the OpenOCD Working Directory are different. So now I can load my elf file properly.
The right "after connection" config of GDB is:

monitor reset halt
file Output/OutputARM/sciopta_armcpu1/sciopta_armcpu1.elf
mon flash write_image erase ../Output/OutputARM/sciopta_armcpu1/sciopta_armcpu1.elf
monitor halt

Lunch time...

Kind regards