102 lines
3.1 KiB
ArmAsm
102 lines
3.1 KiB
ArmAsm
/* fault_s.s - fault handlers for ARM Cortex-M */
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/*
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* Copyright (c) 2013-2014 Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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DESCRIPTION
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Fault handlers for ARM Cortex-M processors.
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*/
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#define _ASMLANGUAGE
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#include <toolchain.h>
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#include <sections.h>
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#include <nanokernel/cpu.h>
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_ASM_FILE_PROLOGUE
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GTEXT(_Fault)
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GTEXT(__hard_fault)
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GTEXT(__mpu_fault)
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GTEXT(__bus_fault)
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GTEXT(__usage_fault)
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GTEXT(__debug_monitor)
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GTEXT(__reserved)
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/*******************************************************************************
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*
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* __fault - fault handler installed in the fault and reserved vectors
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*
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* Entry point for the hard fault, MPU fault, bus fault, usage fault, debug
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* monitor and reserved exceptions.
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*
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* Save the values of the MSP and PSP in r0 and r1 respectively, so the first
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* and second parameters to the _Fault() C function that will handle the rest.
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* This has to be done because at this point we do not know if the fault
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* happened while handling an exception or not, and thus the ESF could be on
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* either stack. _Fault() will find out where the ESF resides.
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*
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* Provides these symbols:
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*
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* __hard_fault
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* __mpu_fault
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* __bus_fault
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* __usage_fault
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* __debug_monitor
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* __reserved
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*/
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SECTION_SUBSEC_FUNC(TEXT,__fault,__hard_fault)
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SECTION_SUBSEC_FUNC(TEXT,__fault,__mpu_fault)
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SECTION_SUBSEC_FUNC(TEXT,__fault,__bus_fault)
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SECTION_SUBSEC_FUNC(TEXT,__fault,__usage_fault)
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SECTION_SUBSEC_FUNC(TEXT,__fault,__debug_monitor)
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SECTION_SUBSEC_FUNC(TEXT,__fault,__reserved)
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_GDB_STUB_EXC_ENTRY
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/* force unlock interrupts */
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eors.n r0, r0
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msr BASEPRI, r0
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mrs r0, MSP
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mrs r1, PSP
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push {lr}
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bl _Fault
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_GDB_STUB_EXC_EXIT
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pop {pc}
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.end
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