Recover Stack Trace on Hardfault For Arm Cortex M

[kammce]

Example links to where others have asked or done this:

• https://www.freertos.org/Debugging-Hard-Faults-On-Cortex-M-Microcontrollers.html
• https://www.freertos.org/FreeRTOS_Support_Forum_Archive/July_2017/freertos_How_to_catch_code_that_caused_the_hard_fault_f16902b9j.html
• https://stackoverflow.com/questions/31255400/how-to-retain-a-stacktrace-when-cortex-m3-gone-in-hardfault

[kammce]

https://interrupt.memfault.com/blog/cortex-m-fault-debug