关于启动文件分析的(MDK-ARM)
Posted wy_2016
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;******************** (C) COPYRIGHT 2010 STMicroelectronics ******************** ;* File Name : startup_stm32f10x_hd.s ;* Author : MCD Application Team ;* Version : V3.4.0 ;* Date : 10/15/2010 ;* Description : STM32F10x High Density Devices vector table for MDK-ARM ;* toolchain. ;* This module performs: ;* - Set the initial SP ;* - Set the initial PC == Reset_Handler ;* - Set the vector table entries with the exceptions ISR address ;* - Configure the clock system and also configure the external ;* SRAM mounted on STM3210E-EVAL board to be used as data ;* memory (optional, to be enabled by user) ;* - Branches to __main in the C library (which eventually ;* calls main()). ;* After Reset the CortexM3 processor is in Thread mode, ;* priority is Privileged, and the Stack is set to Main. ;* <<< Use Configuration Wizard in Context Menu >>> ; INITIALIZE EXCEPTION VECTORS ; 首先对栈和堆的大小进行定义，并在代码区的起始处建立中断向量表，其第一个表项是栈 ; 顶地址，第二个表项是复位中断服务入口地址。然后在复位中断服务程序中跳转C/C++标 ; 准实时库的__main函数。假设STM32被设置为从内部FLASH启动中断向量表起始地位为0x8000000， ; 则栈顶地址存放于0x8000000处，而复位中断服务入口地址存放于0x8000004处。当STM32遇 ; 到复位信号后，则从0x80000004处取出复位中断服务入口地址继而执行复位中断服务程序， ; 然后跳转__main函数，最后来到C的世界。 ; DCD指令：作用是开辟一段空间，其意义等价于C语言中的地址符“&”。开始建立的中断向量 ; 表则类似于使用C语.其每一个成员都是一个函数指针，分别指向各个中断服务函数 ;伪指令AREA，表示开辟一段大小为Stack_Size的内存空间作为栈，段名是STACK，可读可写。 ;NOINIT：指定此数据段仅仅保留了内存单元，而没有将各初始值写入内存单元，或者将各个内存单元值初始化为0 ; Amount of memory (in bytes) allocated for Stack ; Tailor this value to your application needs ; <h> Stack Configuration ; <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8> ; </h> Stack_Size EQU 0x0000200 AREA STACK, NOINIT, READWRITE, ALIGN=3 ;解释在上面有说明 Stack_Mem SPACE Stack_Size ;分配连续 Stack_Size 字节的存储单元并初始化为 0。 __initial_sp ;标号__initial_sp，表示栈空间顶地址。 ; <h> Heap Configuration ; <o> Heap Size (in Bytes) <0x0-0xFFFFFFFF:8> ; </h> Heap_Size EQU 0x0000200 AREA HEAP, NOINIT, READWRITE, ALIGN=3 ;ALIGN用来指定对齐方式， 8字节对齐 __heap_base ;表示堆空间起始地址 Heap_Mem SPACE Heap_Size __heap_limit ;表示堆空间结束地址 PRESERVE8 ;PRESERVE8 指令指定当前文件保持堆栈八字节对齐 THUMB ;THUMB指令 ; Vector Table Mapped to Address 0 at Reset ;实际上是在CODE区（假设STM32从FLASH启动，则此中断向量表起始地址即为0x8000000） AREA RESET, DATA, READONLY ;定义一块数据段，只可读，段名字是RESET EXPORT __Vectors ;EXPORT：在程序中声明一个全局的标号__Vectors，该标号可在其他的文件中引用 EXPORT __Vectors_End ;在程序中声明一个全局的标号__Vectors_End EXPORT __Vectors_Size ;在程序中声明一个全局的标号__Vectors_Size __Vectors ;建立中断向量表 DCD __initial_sp ; 0,Top of Stack DCD Reset_Handler ; 1,Reset Handler DCD NMI_Handler ; 2,NMI Handler DCD HardFault_Handler ; 3,Hard Fault Handler DCD MemManage_Handler ; 4,MPU Fault Handler DCD BusFault_Handler ; 5,Bus Fault Handler DCD UsageFault_Handler ; 6,Usage Fault Handler DCD 0 ; 7,Reserved DCD 0 ; 8,Reserved DCD 0 ; 9,Reserved DCD 0 ; 10,Reserved DCD SVC_Handler ; 11,SVCall Handler DCD DebugMon_Handler ; 12,Debug Monitor Handler DCD 0 ; 13,Reserved DCD PendSV_Handler ;14,PendSV Handler DCD SysTick_Handler ;15,uC/OS-II Tick ISR Handler ; External Interrupts DCD WWDG_IRQHandler ; 16, INTISR[ 0] Window Watchdog. DCD PVD_IRQHandler ; 17, INTISR[ 1] PVD through EXTI Line Detection. DCD TAMPER_IRQHandler ; 18, INTISR[ 2] Tamper Interrupt. DCD RTC_IRQHandler ; 19, INTISR[ 3] RTC Global Interrupt. DCD FLASH_IRQHandler ; 20, INTISR[ 4] FLASH Global Interrupt. DCD RCC_IRQHandler ; 21, INTISR[ 5] RCC Global Interrupt. DCD EXTI0_IRQHandler ; 22, INTISR[ 6] EXTI Line0 Interrupt. DCD EXTI1_IRQHandler ; 23, INTISR[ 7] EXTI Line1 Interrupt. DCD EXTI2_IRQHandler ; 24, INTISR[ 8] EXTI Line2 Interrupt. DCD EXTI3_IRQHandler ; 25, INTISR[ 9] EXTI Line3 Interrupt. DCD EXTI4_IRQHandler ; 26, INTISR[ 10] EXTI Line4 Interrupt. DCD DMA1_Channel1_IRQHandler ; 27, INTISR[ 11] DMA Channel1 Global Interrupt. DCD DMA1_Channel2_IRQHandler ; 28, INTISR[ 12] DMA Channel2 Global Interrupt. DCD DMA1_Channel3_IRQHandler ; 29, INTISR[ 13] DMA Channel3 Global Interrupt. DCD DMA1_Channel4_IRQHandler ; 30, INTISR[ 14] DMA Channel4 Global Interrupt. DCD DMA1_Channel5_IRQHandler ; 31, INTISR[ 15] DMA Channel5 Global Interrupt. DCD DMA1_Channel6_IRQHandler ; 32, INTISR[ 16] DMA Channel6 Global Interrupt. DCD DMA1_Channel7_IRQHandler ; 33, INTISR[ 17] DMA Channel7 Global Interrupt. DCD ADC1_2_IRQHandler ; 34, INTISR[ 18] ADC1 & ADC2 Global Interrupt. DCD USB_HP_CAN1_TX_IRQHandler ; 35, INTISR[ 19] USB High Prio / CAN TX Interrupts. DCD USB_LP_CAN1_RX0_IRQHandler ; 36, INTISR[ 20] USB Low Prio / CAN RX0 Interrupts. DCD CAN1_RX1_IRQHandler ; 37, INTISR[ 21] CAN RX1 Interrupt. DCD CAN1_SCE_IRQHandler ; 38, INTISR[ 22] CAN SCE Interrupt. DCD EXTI9_5_IRQHandler ; 39, INTISR[ 23] EXTI Line[9:5] Interrupt. DCD TIM1_BRK_IRQHandler ; 40, INTISR[ 24] TIM1 Break Interrupt. DCD TIM1_UP_IRQHandler ; 41, INTISR[ 25] TIM1 Update Interrupt. DCD TIM1_TRG_COM_IRQHandler ; 42, INTISR[ 26] TIM1 Trig & Commutation Interrupts. DCD TIM1_CC_IRQHandler ; 43, INTISR[ 27] TIM1 Capture Compare Interrupt. DCD TIM2_IRQHandler ; 44, INTISR[ 28] TIM2 Global Interrupt. DCD TIM3_IRQHandler ; 45, INTISR[ 29] TIM3 Global Interrupt. DCD TIM4_IRQHandler ; 46, INTISR[ 30] TIM4 Global Interrupt. DCD I2C1_EV_IRQHandler ; 47, INTISR[ 31] I2C1 Event Interrupt. DCD I2C1_ER_IRQHandler ; 48, INTISR[ 32] I2C1 Error Interrupt. DCD I2C2_EV_IRQHandler ; 49, INTISR[ 33] I2C2 Event Interrupt. DCD I2C2_ER_IRQHandler ; 50, INTISR[ 34] I2C2 Error Interrupt. DCD SPI1_IRQHandler ; 51, INTISR[ 35] SPI1 Global Interrupt. DCD SPI2_IRQHandler ; 52, INTISR[ 36] SPI2 Global Interrupt. DCD USART1_IRQHandler ; 53, INTISR[ 37] USART1 Global Interrupt. DCD USART2_IRQHandler ; 54, INTISR[ 38] USART2 Global Interrupt. DCD USART3_IRQHandler ; 55, INTISR[ 39] USART3 Global Interrupt. DCD EXTI15_10_IRQHandler ; 56, INTISR[ 40] EXTI Line [15:10] Interrupts. DCD RTCAlarm_IRQHandler ; 57, INTISR[ 41] RTC Alarm EXT Line Interrupt. DCD USBWakeUp_IRQHandler ; 58, INTISR[ 42] USB Wakeup from Suspend EXTI Int. DCD TIM8_BRK_IRQHandler ; 59, INTISR[ 43] TIM8 Break Interrupt. DCD TIM8_UP_IRQHandler ; 60, INTISR[ 44] TIM8 Update Interrupt. DCD TIM8_TRG_COM_IRQHandler ; 61, INTISR[ 45] TIM8 Trigg/Commutation Interrupts. DCD TIM8_CC_IRQHandler ; 62, INTISR[ 46] TIM8 Capture Compare Interrupt. DCD ADC3_IRQHandler ; 63, INTISR[ 47] ADC3 Global Interrupt. DCD FSMC_IRQHandler ; 64, INTISR[ 48] FSMC Global Interrupt. DCD SDIO_IRQHandler ; 65, INTISR[ 49] SDIO Global Interrupt. DCD TIM5_IRQHandler ; 66, INTISR[ 50] TIM5 Global Interrupt. DCD SPI3_IRQHandler ; 67, INTISR[ 51] SPI3 Global Interrupt. DCD UART4_IRQHandler ; 68, INTISR[ 52] UART4 Global Interrupt. DCD UART5_IRQHandler ; 69, INTISR[ 53] UART5 Global Interrupt. DCD TIM6_IRQHandler ; 70, INTISR[ 54] TIM6 Global Interrupt. DCD TIM7_IRQHandler ; 71, INTISR[ 55] TIM7 Global Interrupt. DCD DMA2_Channel1_IRQHandler ; 72, INTISR[ 56] DMA2 Channel1 Global Interrupt. DCD DMA2_Channel2_IRQHandler ; 73, INTISR[ 57] DMA2 Channel2 Global Interrupt. DCD DMA2_Channel3_IRQHandler ; 74, INTISR[ 58] DMA2 Channel3 Global Interrupt. DCD DMA2_Channel4_5_IRQHandler ; 75, INTISR[ 59] DMA2 Channel4/5 Global Interrups. __Vectors_End __Vectors_Size EQU __Vectors_End - __Vectors ;得到向量表的大小,304个字节也就是0x130个字节 AREA |.text|, CODE, READONLY ;定义一个代码段，可读，段名字是.text ; Reset handler Reset_Handler PROC ;利用PROC、ENDP这一对伪指令把程序段分为若干个过程，使程序的结构加清晰 EXPORT Reset_Handler [WEAK] ;在外部没有定义该符号时导出该符号Reset_Handler IMPORT __main ;IMPORT：伪指令用于通知编译器要使用的标号在其他的源文件中定义 IMPORT SystemInit ;但要在当前源文件中引用，而且无论当前源文件是否引用该标号，该标号均会被加入到当前源文件的符号表中 LDR R0, =SystemInit BLX R0 LDR R0, =__main ;__main为 运行时库提供的函数；完成堆栈，堆的初始话等工作，会调用下面定义的__user_initial_stackheap BX R0 ;跳到__main，进入C的世界 ENDP ; Dummy Exception Handlers (infinite loops which can be modified) NMI_Handler PROC EXPORT NMI_Handler [WEAK] ;WEAK声明其他的同名标号优先于该标号被引用,就是说如果外面声明了的话， B . ;会调用外面的 ENDP HardFault_Handler PROC EXPORT HardFault_Handler [WEAK] B . ENDP MemManage_Handler PROC EXPORT MemManage_Handler [WEAK] B . ENDP BusFault_Handler PROC EXPORT BusFault_Handler [WEAK] B . ENDP UsageFault_Handler PROC EXPORT UsageFault_Handler [WEAK] B . ENDP SVC_Handler PROC EXPORT SVC_Handler [WEAK] B . ENDP DebugMon_Handler PROC EXPORT DebugMon_Handler [WEAK] B . ENDP PendSV_Handler PROC EXPORT PendSV_Handler [WEAK] B . ENDP SysTick_Handler PROC EXPORT SysTick_Handler [WEAK] B . ENDP Default_Handler PROC EXPORT WWDG_IRQHandler [WEAK] EXPORT PVD_IRQHandler [WEAK] EXPORT TAMPER_IRQHandler [WEAK] EXPORT RTC_IRQHandler [WEAK] EXPORT FLASH_IRQHandler [WEAK] EXPORT RCC_IRQHandler [WEAK] EXPORT EXTI0_IRQHandler [WEAK] EXPORT EXTI1_IRQHandler [WEAK] EXPORT EXTI2_IRQHandler [WEAK] EXPORT EXTI3_IRQHandler [WEAK] EXPORT EXTI4_IRQHandler [WEAK] EXPORT DMA1_Channel1_IRQHandler [WEAK] EXPORT DMA1_Channel2_IRQHandler [WEAK] EXPORT DMA1_Channel3_IRQHandler [WEAK] EXPORT DMA1_Channel4_IRQHandler [WEAK] EXPORT DMA1_Channel5_IRQHandler [WEAK] EXPORT DMA1_Channel6_IRQHandler [WEAK] EXPORT DMA1_Channel7_IRQHandler [WEAK] EXPORT ADC1_2_IRQHandler [WEAK] EXPORT USB_HP_CAN1_TX_IRQHandler [WEAK] EXPORT USB_LP_CAN1_RX0_IRQHandler [WEAK] EXPORT CAN1_RX1_IRQHandler [WEAK] EXPORT CAN1_SCE_IRQHandler [WEAK] EXPORT EXTI9_5_IRQHandler [WEAK] EXPORT TIM1_BRK_IRQHandler [WEAK] EXPORT TIM1_UP_IRQHandler [WEAK] EXPORT TIM1_TRG_COM_IRQHandler [WEAK] EXPORT TIM1_CC_IRQHandler [WEAK] EXPORT TIM2_IRQHandler [WEAK] EXPORT TIM3_IRQHandler [WEAK] EXPORT TIM4_IRQHandler [WEAK] EXPORT I2C1_EV_IRQHandler [WEAK] EXPORT I2C1_ER_IRQHandler [WEAK] EXPORT I2C2_EV_IRQHandler [WEAK] EXPORT I2C2_ER_IRQHandler [WEAK] EXPORT SPI1_IRQHandler [WEAK] EXPORT SPI2_IRQHandler [WEAK] EXPORT USART1_IRQHandler [WEAK] EXPORT USART2_IRQHandler [WEAK] EXPORT USART3_IRQHandler [WEAK] EXPORT EXTI15_10_IRQHandler [WEAK] EXPORT RTCAlarm_IRQHandler [WEAK] EXPORT USBWakeUp_IRQHandler [WEAK] EXPORT TIM8_BRK_IRQHandler [WEAK] EXPORT TIM8_UP_IRQHandler [WEAK] EXPORT TIM8_TRG_COM_IRQHandler [WEAK] EXPORT TIM8_CC_IRQHandler [WEAK] EXPORT ADC3_IRQHandler [WEAK] EXPORT FSMC_IRQHandler [WEAK] EXPORT SDIO_IRQHandler [WEAK] EXPORT TIM5_IRQHandler [WEAK] EXPORT SPI3_IRQHandler [WEAK] EXPORT UART4_IRQHandler [WEAK] EXPORT UART5_IRQHandler [WEAK] EXPORT TIM6_IRQHandler [WEAK] EXPORT TIM7_IRQHandler [WEAK] EXPORT DMA2_Channel1_IRQHandler [WEAK] EXPORT DMA2_Channel2_IRQHandler [WEAK] EXPORT DMA2_Channel3_IRQHandler [WEAK] EXPORT DMA2_Channel4_5_IRQHandler [WEAK] WWDG_IRQHandler PVD_IRQHandler TAMPER_IRQHandler RTC_IRQHandler FLASH_IRQHandler RCC_IRQHandler EXTI0_IRQHandler EXTI1_IRQHandler EXTI2_IRQHandler EXTI3_IRQHandler EXTI4_IRQHandler DMA1_Channel1_IRQHandler DMA1_Channel2_IRQHandler DMA1_Channel3_IRQHandler DMA1_Channel4_IRQHandler DMA1_Channel5_IRQHandler DMA1_Channel6_IRQHandler DMA1_Channel7_IRQHandler ADC1_2_IRQHandler USB_HP_CAN1_TX_IRQHandler USB_LP_CAN1_RX0_IRQHandler CAN1_RX1_IRQHandler CAN1_SCE_IRQHandler EXTI9_5_IRQHandler TIM1_BRK_IRQHandler TIM1_UP_IRQHandler TIM1_TRG_COM_IRQHandler TIM1_CC_IRQHandler TIM2_IRQHandler TIM3_IRQHandler TIM4_IRQHandler I2C1_EV_IRQHandler I2C1_ER_IRQHandler I2C2_EV_IRQHandler I2C2_ER_IRQHandler SPI1_IRQHandler SPI2_IRQHandler USART1_IRQHandler USART2_IRQHandler USART3_IRQHandler EXTI15_10_IRQHandler RTCAlarm_IRQHandler USBWakeUp_IRQHandler TIM8_BRK_IRQHandler TIM8_UP_IRQHandler TIM8_TRG_COM_IRQHandler TIM8_CC_IRQHandler ADC3_IRQHandler FSMC_IRQHandler SDIO_IRQHandler TIM5_IRQHandler SPI3_IRQHandler UART4_IRQHandler UART5_IRQHandler TIM6_IRQHandler TIM7_IRQHandler DMA2_Channel1_IRQHandler DMA2_Channel2_IRQHandler DMA2_Channel3_IRQHandler DMA2_Channel4_5_IRQHandler B . ENDP ALIGN ;******************************************************************************* ; User Stack and Heap initialization ;******************************************************************************* IF :DEF:__MICROLIB ;判断是否使用DEF:__MICROLIB（micro lib） EXPORT __initial_sp ;使用的话则将栈顶地址，堆始末地址赋予全局属 EXPORT __heap_base ;性，使外部程序可以使用 EXPORT __heap_limit ELSE ;如果使用默认C库运行时 IMPORT __use_two_region_memory ;定义全局标号__use_two_region_memory EXPORT __user_initial_stackheap ;声明全局标号__user_initial_stackheap，这样外程序也可调用此标号 ;则进行堆栈和堆的赋值，在__main函数执行过程中调用 __user_initial_stackheap ;标号__user_initial_stackheap，表示用户堆栈初始化程序入口 LDR R0, = Heap_Mem ;保存堆始地址 LDR R1, =(Stack_Mem + Stack_Size) ;保存栈的大小 LDR R2, = (Heap_Mem + Heap_Size) ;保存堆的大小 LDR R3, = Stack_Mem ;保存栈顶指针 BX LR ALIGN ENDIF END ;******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE*****
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