I'm trying to debug a nonresponsive device when using Linux 5.4-rt compared to 4.19-rt. However, after loading the symbols (add-symbol-file vmlinux), I get this error message:
WARNING(ROS60): Could not enable OS support as the OS does not appear to be initialized. This might be caused by a mismatch between the loaded symbols and the code on the target or because the OS is not up and running. Enabling OS support will be re-attempted when the target next stops.
Note that kernel debugging works fine with Linux 4.19-rt. I'm using Arm Development Studio 2020.0 (Intel FPGA Version) and debugging a Cyclone V SoC using an Altera USB-Blaster II, if that's of any interest.
Can anyone tell me what's the limit here? Why does it work for 4.19, but not for 5.4?
Thanks,
Simon
Just for the record, here's my output of "uname -a" (which is also in the support case):Linux panosdevice 5.4-rt-pf-socfpga-cyclone5 #1 SMP PREEMPT_RT Fri Sep 11 13:33:01 CEST 2020 armv7l GNU/Linux