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