repair hard fault return bug
before modify,when exception hook returns true,programs can't return to normal execution flow
; * 2013-06-18 aozima add restore MSP feature.
; * 2013-06-23 aozima support lazy stack optimized.
; * 2018-07-24 aozima enhancement hard fault exception handler.
+; * 2021-02-15 lizhirui repair hard fault return bug
; */
;/**
@@ -235,11 +236,6 @@ MemManage_Handler
ENDIF
STMFD r0!, {lr} ; push exec_return register
- TST lr, #0x04 ; if(!EXC_RETURN[2])
- ITE EQ
- MSREQ msp, r0 ; [2]=0 ==> Z=1, update stack pointer to MSP.
- MSRNE psp, r0 ; [2]=1 ==> Z=0, update stack pointer to PSP.
-
PUSH {lr}
BL rt_hw_hard_fault_exception
POP {lr}
