I guess by "HardFault" that you are running some port for some ARM
processor.
You should be able to follow the HardFault and determine where the fault
is, and report that to the one who did the port. Your processor
exception mechanism is well documented.
I guess you are running a Cortex-M, where a HardFault is an escalation
of a specific fault, which you could enable and have a clearer
understanding of what is going on.
FreeRTOS has tutorials on this
http://www.freertos.org/Debugging-Hard-Faults-On-Cortex-M-Microcontrollers.html
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