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fixed get sp in HardFault_Handler. close #1646

This commit is contained in:
aozima 2018-07-24 16:08:56 +08:00
parent 2316dc3f0f
commit a0fe71f78f
1 changed files with 8 additions and 5 deletions
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13
libcpu/arm/cortex-m3/context_rvds.S
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@ -1,7 +1,7 @@
;/*
; * File : context_rvds.S
; * This file is part of RT-Thread RTOS
; * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
; * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
; *
; * The license and distribution terms for this file may be
; * found in the file LICENSE in this distribution or at
@ -186,14 +186,17 @@ HardFault_Handler PROC
; get current context
TST lr, #0x04 ; if(!EXC_RETURN[2])
MRSNE r0, msp ; get fault context from handler.
MRSEQ r0, psp ; get fault context from thread.
ITE EQ
MRSEQ r0, msp ; [2]=0 ==> Z=1, get fault context from handler.
MRSNE r0, psp ; [2]=1 ==> Z=0, get fault context from thread.
STMFD r0!, {r4 - r11} ; push r4 - r11 register
STMFD r0!, {lr} ; push exec_return register
MSRNE msp, r0 ; update stack pointer to MSP.
MSREQ psp, r0 ; update stack pointer to PSP.
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