252 lines
7.4 KiB
C
252 lines
7.4 KiB
C
/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* 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, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @defgroup los_exc Exception handling
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* @ingroup kernel
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*/
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#ifndef _LOS_EXC_H
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#define _LOS_EXC_H
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#include "los_typedef.h"
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#include "arch_config.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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/**
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* @ingroup los_exc
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* Register information structure
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*
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* Description: register information stored when an exception occurs on an LPC2458 platform.
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*
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* Note: The following register names without uw are the register names used in the chip manual.
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*/
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#ifdef LOSCFG_ARCH_ARM_AARCH64
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#define EXC_GEN_REGS_NUM 30
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typedef struct {
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UINT64 X[EXC_GEN_REGS_NUM]; /**< Register X0-X29 */
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UINT64 LR; /**< Program returning address. X30 */
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UINT64 SP;
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UINT64 regELR;
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UINT64 SPSR;
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} ExcContext;
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#else
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typedef struct {
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UINT32 USP; /**< User mode stack pointer */
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UINT32 ULR; /**< User mode program returning address */
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UINT32 regCPSR; /**< Current program status register (CPSR) */
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UINT32 R0; /**< Register R0 */
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UINT32 R1; /**< Register R1 */
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UINT32 R2; /**< Register R2 */
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UINT32 R3; /**< Register R3 */
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UINT32 R4; /**< Register R4 */
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UINT32 R5; /**< Register R5 */
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UINT32 R6; /**< Register R6 */
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UINT32 R7; /**< Register R7 */
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UINT32 R8; /**< Register R8 */
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UINT32 R9; /**< Register R9 */
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UINT32 R10; /**< Register R10 */
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UINT32 R11; /**< Register R11 */
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UINT32 R12; /**< Register R12 */
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UINT32 SP; /**< Stack pointer */
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UINT32 LR; /**< Program returning address. */
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UINT32 PC; /**< PC pointer of the exceptional function */
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} ExcContext;
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#endif
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/**
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* @ingroup los_exc
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* Exception information structure
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*
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* Description: exception information stored when an exception occurs on an LPC2458 platform.
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*
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*/
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typedef struct {
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UINT16 phase; /**< Phase in which an exception occurs */
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UINT16 type; /**< Exception type */
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UINT16 nestCnt; /**< Count of nested exception */
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UINT16 reserved; /**< Reserved for alignment */
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ExcContext *context; /**< Hardware context when an exception occurs */
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} ExcInfo;
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/**
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* @ingroup los_exc
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* @brief Kernel FP Register address obtain function.
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*
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* @par Description:
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* The API is used to obtain the FP Register address.
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* @attention None.
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*
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* @param None.
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*
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* @retval #UINTPTR The FP Register address.
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*
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* @par Dependency:
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* los_exc.h: the header file that contains the API declaration.
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* @see None.
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*/
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STATIC INLINE UINTPTR Get_Fp(VOID)
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{
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UINTPTR regFp;
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#ifdef LOSCFG_ARCH_ARM_AARCH64
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__asm__ __volatile__("mov %0, X29" : "=r"(regFp));
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#else
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__asm__ __volatile__("mov %0, fp" : "=r"(regFp));
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#endif
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return regFp;
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}
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/**
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* @ingroup los_exc
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* @brief Define an exception handling function hook.
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*
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* @par Description:
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* This API is used to define the exception handling function hook based on the type of
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* the exception handling function and record exceptions.
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* @attention None.
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*
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* @param None.
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*
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* @retval None.
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*
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* @par Dependency:
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* los_exc.h: the header file that contains the API declaration.
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* @see None.
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*/
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typedef VOID (*EXC_PROC_FUNC)(UINT32, ExcContext *, UINT32, UINT32);
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/**
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* @ingroup los_exc
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* @brief Register an exception handling hook.
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*
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* @par Description:
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* This API is used to register an exception handling hook.
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* @attention If the hook is registered for multiple times, the hook registered at the last time is effective.
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* @attention The hook can be registered as NULL, indicating that the hook registration is canceled.
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* @param excHook [IN] Type #EXC_PROC_FUNC: hook function.
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*
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* @retval #LOS_OK The exception handling hook is successfully registered.
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*
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* @par Dependency:
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* los_exc.h: the header file that contains the API declaration.
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* @see None.
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*/
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extern UINT32 LOS_ExcRegHook(EXC_PROC_FUNC excHook);
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/**
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* @ingroup los_exc
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* @brief Kernel panic function.
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*
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* @par Description:
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* Stack function that prints kernel panics.
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* @attention After this function is called and stack information is printed, the system will fail to respond.
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* @attention The input parameter can be NULL.
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* @param fmt [IN] Type #CHAR* : variadic argument.
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*
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* @retval #None.
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*
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* @par Dependency:
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* los_exc.h: the header file that contains the API declaration.
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* @see None.
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*/
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NORETURN VOID LOS_Panic(const CHAR *fmt, ...);
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/**
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* @ingroup los_exc
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* @brief record LR function.
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*
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* @par Description:
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* @attention
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* @param LR [IN] Type #UINTPTR * LR buffer.
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* @param recordCount [IN] Type UINT32 record LR lay number.
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* @param jumpCount [IN] Type UINT32 ignore LR lay number.
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*
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* @retval #None.
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*
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* @par Dependency:
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* los_exc.h: the header file that contains the API declaration.
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* @see None.
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*/
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VOID LOS_RecordLR(UINTPTR *LR, UINT32 LRSize, UINT32 recordCount, UINT32 jumpCount);
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/**
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* @ingroup los_exc
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* @brief Kernel backtrace function.
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*
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* @par Description:
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* Backtrace function that prints task call stack information traced from the running task.
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* @attention None.
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*
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* @param None.
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*
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* @retval #None.
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*
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* @par Dependency:
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* los_exc.h: the header file that contains the API declaration.
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* @see None.
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*/
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extern VOID OsBackTrace(VOID);
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/**
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* @ingroup los_exc
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* @brief Kernel task backtrace function.
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*
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* @par Description:
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* Backtrace function that prints task call stack information traced from the input task.
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* @attention
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* <ul>
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* <li>The input taskID should be valid.</li>
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* </ul>
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*
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* @param taskID [IN] Type #UINT32 Task ID.
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*
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* @retval #None.
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*
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* @par Dependency:
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* los_exc.h: the header file that contains the API declaration.
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* @see None.
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*/
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extern VOID OsTaskBackTrace(UINT32 taskID);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __cplusplus */
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#endif /* _LOS_EXC_H */
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