bs_bcu_app/system/segger/HardFaultHandler.S

57 lines
1.7 KiB
ArmAsm

;
;----------------------------------------------------------------------
;File : HardFaultHandler.S
;Purpose : HardFault exception handler for IAR, Keil and GNU assembler.
; Evaluates used stack (MSP, PSP) and passes appropiate stack
; pointer to the HardFaultHandler "C"-routine.
;------------- END-OF-HEADER ------------------------------------------
;
;/*********************************************************************
;*
;* Forward declarations of segments used
;*
;**********************************************************************
;*/
AREA OSKERNEL, CODE, READONLY, ALIGN=2
PRESERVE8
EXPORT HardFault_Handler
IMPORT HardFaultHandler
THUMB
;/*********************************************************************
;*
;* Global functions
;*
;**********************************************************************
;*/
;/*********************************************************************
;*
;* HardFault_Handler()
;*
;* Function description
;* Evaluates the used stack (MSP, PSP) and passes the appropiate
;* stack pointer to the HardFaultHandler "C"-routine.
;*
;* Notes
;* (1) Ensure that HardFault_Handler is part of the exception table
;*/
HardFault_Handler
;// This version is for Cortex M3, Cortex M4 and Cortex M4F
tst LR, #4 ;// Check EXC_RETURN in Link register bit 2.
ite EQ
mrseq R0, MSP ;// Stacking was using MSP.
mrsne R0, PSP ;// Stacking was using PSP.
b HardFaultHandler ;// Stack pointer passed through R0.
END
;/****** End Of File *************************************************/