DeetCode.

Stack Frame Inspection

Hard Assembly Debugging Asked at Intel
Solve this problem

Write a fault handler prologue that captures the stacked register frame so a crash dump can report the faulting PC and LR.

Constraints

  • Determine whether MSP or PSP was in use from bit 2 of EXC_RETURN in LR.
  • Pass the stack frame pointer to a C function in r0.
  • Do not disturb the stacked frame.
  • Must work for both handler-mode and thread-mode faults.
  • Tail-call the C handler.
  • Cortex-M syntax.
Starter codeAssembly
1.global HardFault_Handler2HardFault_Handler:3    @ TODO4    b .