How to trace function calls in controller code

[RayCxggg]

Hi, I am trying to trace function calls in the stack controller part. I planned to printf some log when a certain function is called and find out the relationship of different functions.

But I notice that there is no logging output under Mynewt/repos/apache-mynewt-nimble/nimble/controller/src directory. When I added MODLOG_DFLT in functions like ble_ll_rx_end, the peripheral failed in connection establishment due to unknown reason (but it worked in ble_ll_rx_pkt_in). I wonder whether there is a way to print logging information from the controller part, or how I can trace the function calls at runtime.

Highly appreciate!