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楼主 |
发表于 2020-5-9 23:14:54
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现在好些软件包都喜欢将汇编底层做成三合一，像SEGGER的提供一些软件包喜欢MDK,IAR和GCC三合一的方式，之前发布的SEGGER HardFault就是。
MDK的那个老汇编不支持#if else
- ;/*********************************************************************
- ;* SEGGER Microcontroller GmbH & Co. KG *
- ;* The Embedded Experts *
- ;**********************************************************************
- ;* *
- ;* (c) 1995 - 2016 SEGGER Microcontroller GmbH & Co. KG *
- ;* *
- ;* Internet: segger.com Support: support_embos@segger.com *
- ;* *
- ;**********************************************************************
- ;* *
- ;* embOS * Real time operating system for microcontrollers *
- ;* *
- ;* Please note: *
- ;* *
- ;* Knowledge of this file may under no circumstances *
- ;* be used to write a similar product or a real-time *
- ;* operating system for in-house use. *
- ;* *
- ;* Thank you for your fairness ! *
- ;* *
- ;**********************************************************************
- ;* *
- ;* OS version: 4.24 *
- ;* *
- ;**********************************************************************
- ;
- ;----------------------------------------------------------------------
- ;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 ------------------------------------------
- ;*/
- #ifndef __IAR_SYSTEMS_ASM__
- #ifndef __CC_ARM
- #ifndef __GNUC__
- #error "Unsupported assembler!"
- #endif
- #endif
- #endif
- ;/*********************************************************************
- ;*
- ;* Forward declarations of segments used
- ;*
- ;**********************************************************************
- ;*/
- #ifdef __IAR_SYSTEMS_ASM__
- SECTION CODE:CODE:NOROOT(2)
- SECTION CSTACK:DATA:NOROOT(3)
- #elif defined __CC_ARM
- AREA OSKERNEL, CODE, READONLY, ALIGN=2
- PRESERVE8
- #endif
- ;/*********************************************************************
- ;*
- ;* Publics
- ;*
- ;**********************************************************************
- ;*/
- #ifdef __IAR_SYSTEMS_ASM__
- SECTION .text:CODE:NOROOT(2)
- PUBLIC HardFault_Handler
- #elif defined __CC_ARM
- EXPORT HardFault_Handler
- #elif defined __GNUC__
- .global HardFault_Handler
- .type HardFault_Handler, function
- #endif
- ;/*********************************************************************
- ;*
- ;* Externals, code
- ;*
- ;**********************************************************************
- ;*/
- #ifdef __IAR_SYSTEMS_ASM__
- EXTERN HardFaultHandler
- #elif defined __CC_ARM
- IMPORT HardFaultHandler
- #elif defined __GNUC__
- .extern HardFaultHandler
- #endif
- ;/*********************************************************************
- ;*
- ;* CODE segment
- ;*
- ;**********************************************************************
- ;*/
- #ifdef __GNUC__
- .syntax unified
- .thumb
- .balign 4
- .text
- #else
- THUMB
- #endif
- ;/*********************************************************************
- ;*
- ;* 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
- ;*/
- #ifdef __GNUC__
- HardFault_Handler:
- #else
- HardFault_Handler
- #endif
- #if (defined (__IAR_SYSTEMS_ASM__) && (__ARM6M__) && (__CORE__ == __ARM6M__)) || \
- (defined (__CC_ARM) && (__TARGET_ARCH_6S_M)) || \
- (defined (__GNUC__) && (__ARM_ARCH_6M__))
- ;// This version is for Cortex M0
- movs R0, #4
- mov R1, LR
- tst R0, R1 ;// Check EXC_RETURN in Link register bit 2.
- bne Uses_PSP
- mrs R0, MSP ;// Stacking was using MSP.
- b Pass_StackPtr
- #ifdef __GNUC__
- Uses_PSP:
- #else
- Uses_PSP
- #endif
- mrs R0, PSP ;// Stacking was using PSP.
- #ifdef __GNUC__
- Pass_StackPtr:
- #else
- Pass_StackPtr
- #endif
- #ifdef __CC_ARM
- ALIGN
- #endif
- ldr R2,=HardFaultHandler
- bx R2 ;// Stack pointer passed through R0.
- #else
- ;// 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.
- #endif
- #ifdef __GNUC__
- .end
- #else
- END
- #endif
- ;/****** End Of File *************************************************/
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发表于 2020-5-9 09:22:02
发表于 2020-5-9 13:26:21
