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6.9.7. Debug event

When Monitor debug-mode debug is enabled an abort can be taken caused by a breakpoint on an instruction access or a watchpoint on a data access. In both cases the memory system completes the access before the abort is taken. If an abort is taken when in Monitor debug-mode debug then the appropriate FSR (IFSR or DFSR) is updated to indicate a debug abort.

If a watchpoint is taken the WFAR is set to the address that caused the watchpoint. Watchpoints are not taken precisely because following instructions can run underneath load and store multiples. The debugger must read the WFAR to determine which instruction caused the debug event.