Debugging FreeRTOS on Cortex-R4

Are there any plans to make the -rtos FreeRTOS support work with Cortex-R processors? How much work would it be to add it?

Start by reviewing OpenOCD's existing `-rtos FreeRTOS` support and the issue's question about Cortex-R processors. The issue names no files or tests; first establish what currently works and what Cortex-R support would require. Done would mean defining the scope and effort, which the issue does not specify.

Written by the indexing model from the issue text.