遗失部分？汇编文件编译

时间：2018-05-08 16:07:30

标签： gcc assembly arm embedded

我使用stm32cubemx软件为我的nucleo-103rb开发板生成了一些初始化代码。该软件已更新以生成makefile项目。我创建了一个基本项目，生成了代码，并更新了makefile以指向我的工具链（ARM提供的gcc-arm-none-eabi-7-2017-q4-major）。该项目编制没有问题。然而，由此产生的二进制文件破坏了我的开发板，我的调试会话甚至无法工作！

在窥探之后，我认为问题是缺少.isr_vectors部分。

STMicro提供的startup_stm32f103xb.s文件：

  .syntax unified
  .cpu cortex-m3
  .fpu softvfp
  .thumb

.global g_pfnVectors
.global Default_Handler

/* start address for the initialization values of the .data section.
defined in linker script */
.word _sidata
/* start address for the .data section. defined in linker script */
.word _sdata
/* end address for the .data section. defined in linker script */
.word _edata
/* start address for the .bss section. defined in linker script */
.word _sbss
/* end address for the .bss section. defined in linker script */
.word _ebss

.equ  BootRAM, 0xF108F85F
/**
 * @brief  This is the code that gets called when the processor first
 *          starts execution following a reset event. Only the absolutely
 *          necessary set is performed, after which the application
 *          supplied main() routine is called.
 * @param  None
 * @retval : None
*/

  .section .text.Reset_Handler
  .weak Reset_Handler
  .type Reset_Handler, %function
Reset_Handler:

/* Copy the data segment initializers from flash to SRAM */
  movs r1, #0
  b LoopCopyDataInit

CopyDataInit:
  ldr r3, =_sidata
  ldr r3, [r3, r1]
  str r3, [r0, r1]
  adds r1, r1, #4

LoopCopyDataInit:
  ldr r0, =_sdata
  ldr r3, =_edata
  adds r2, r0, r1
  cmp r2, r3
  bcc CopyDataInit
  ldr r2, =_sbss
  b LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
  movs r3, #0
  str r3, [r2], #4

LoopFillZerobss:
  ldr r3, = _ebss
  cmp r2, r3
  bcc FillZerobss

/* Call the clock system intitialization function.*/
    bl  SystemInit
/* Call static constructors */
    bl __libc_init_array
/* Call the application's entry point.*/
  bl main
  bx lr
.size Reset_Handler, .-Reset_Handler

/**
 * @brief  This is the code that gets called when the processor receives an
 *         unexpected interrupt.  This simply enters an infinite loop, preserving
 *         the system state for examination by a debugger.
 *
 * @param  None
 * @retval : None
*/
    .section .text.Default_Handler,"ax",%progbits
Default_Handler:
Infinite_Loop:
  b Infinite_Loop
  .size Default_Handler, .-Default_Handler
/******************************************************************************
*
* The minimal vector table for a Cortex M3.  Note that the proper constructs
* must be placed on this to ensure that it ends up at physical address
* 0x0000.0000.
*
******************************************************************************/
  .section .isr_vector,"a",%progbits
  .type g_pfnVectors, %object
  .size g_pfnVectors, .-g_pfnVectors


g_pfnVectors:

  .word _estack
  .word Reset_Handler
  .word NMI_Handler
  .word HardFault_Handler
  .word MemManage_Handler
  .word BusFault_Handler
  .word UsageFault_Handler
  .word 0
  .word 0
  .word 0
  .word 0
  .word SVC_Handler
  .word DebugMon_Handler
  .word 0
  .word PendSV_Handler
  .word SysTick_Handler
  .word WWDG_IRQHandler
  .word PVD_IRQHandler
  .word TAMPER_IRQHandler
  .word RTC_IRQHandler
  .word FLASH_IRQHandler
  .word RCC_IRQHandler
  .word EXTI0_IRQHandler
  .word EXTI1_IRQHandler
  .word EXTI2_IRQHandler
  .word EXTI3_IRQHandler
  .word EXTI4_IRQHandler
  .word DMA1_Channel1_IRQHandler
  .word DMA1_Channel2_IRQHandler
  .word DMA1_Channel3_IRQHandler
  .word DMA1_Channel4_IRQHandler
  .word DMA1_Channel5_IRQHandler
  .word DMA1_Channel6_IRQHandler
  .word DMA1_Channel7_IRQHandler
  .word ADC1_2_IRQHandler
  .word USB_HP_CAN1_TX_IRQHandler
  .word USB_LP_CAN1_RX0_IRQHandler
  .word CAN1_RX1_IRQHandler
  .word CAN1_SCE_IRQHandler
  .word EXTI9_5_IRQHandler
  .word TIM1_BRK_IRQHandler
  .word TIM1_UP_IRQHandler
  .word TIM1_TRG_COM_IRQHandler
  .word TIM1_CC_IRQHandler
  .word TIM2_IRQHandler
  .word TIM3_IRQHandler
  .word TIM4_IRQHandler
  .word I2C1_EV_IRQHandler
  .word I2C1_ER_IRQHandler
  .word I2C2_EV_IRQHandler
  .word I2C2_ER_IRQHandler
  .word SPI1_IRQHandler
  .word SPI2_IRQHandler
  .word USART1_IRQHandler
  .word USART2_IRQHandler
  .word USART3_IRQHandler
  .word EXTI15_10_IRQHandler
  .word RTC_Alarm_IRQHandler
  .word USBWakeUp_IRQHandler
  .word 0
  .word 0
  .word 0
  .word 0
  .word 0
  .word 0
  .word 0
  .word BootRAM          /* @0x108. This is for boot in RAM mode for
                            STM32F10x Medium Density devices. */

/*******************************************************************************
*
* Provide weak aliases for each Exception handler to the Default_Handler.
* As they are weak aliases, any function with the same name will override
* this definition.
*
*******************************************************************************/

  .weak NMI_Handler
  .thumb_set NMI_Handler,Default_Handler

  .weak HardFault_Handler
  .thumb_set HardFault_Handler,Default_Handler

  .weak MemManage_Handler
  .thumb_set MemManage_Handler,Default_Handler

  .weak BusFault_Handler
  .thumb_set BusFault_Handler,Default_Handler

  .weak UsageFault_Handler
  .thumb_set UsageFault_Handler,Default_Handler

  .weak SVC_Handler
  .thumb_set SVC_Handler,Default_Handler

  .weak DebugMon_Handler
  .thumb_set DebugMon_Handler,Default_Handler

  .weak PendSV_Handler
  .thumb_set PendSV_Handler,Default_Handler

  .weak SysTick_Handler
  .thumb_set SysTick_Handler,Default_Handler

  .weak WWDG_IRQHandler
  .thumb_set WWDG_IRQHandler,Default_Handler

  .weak PVD_IRQHandler
  .thumb_set PVD_IRQHandler,Default_Handler

  .weak TAMPER_IRQHandler
  .thumb_set TAMPER_IRQHandler,Default_Handler

  .weak RTC_IRQHandler
  .thumb_set RTC_IRQHandler,Default_Handler

  .weak FLASH_IRQHandler
  .thumb_set FLASH_IRQHandler,Default_Handler

  .weak RCC_IRQHandler
  .thumb_set RCC_IRQHandler,Default_Handler

  .weak EXTI0_IRQHandler
  .thumb_set EXTI0_IRQHandler,Default_Handler

  .weak EXTI1_IRQHandler
  .thumb_set EXTI1_IRQHandler,Default_Handler

  .weak EXTI2_IRQHandler
  .thumb_set EXTI2_IRQHandler,Default_Handler

  .weak EXTI3_IRQHandler
  .thumb_set EXTI3_IRQHandler,Default_Handler

  .weak EXTI4_IRQHandler
  .thumb_set EXTI4_IRQHandler,Default_Handler

  .weak DMA1_Channel1_IRQHandler
  .thumb_set DMA1_Channel1_IRQHandler,Default_Handler

  .weak DMA1_Channel2_IRQHandler
  .thumb_set DMA1_Channel2_IRQHandler,Default_Handler

  .weak DMA1_Channel3_IRQHandler
  .thumb_set DMA1_Channel3_IRQHandler,Default_Handler

  .weak DMA1_Channel4_IRQHandler
  .thumb_set DMA1_Channel4_IRQHandler,Default_Handler

  .weak DMA1_Channel5_IRQHandler
  .thumb_set DMA1_Channel5_IRQHandler,Default_Handler

  .weak DMA1_Channel6_IRQHandler
  .thumb_set DMA1_Channel6_IRQHandler,Default_Handler

  .weak DMA1_Channel7_IRQHandler
  .thumb_set DMA1_Channel7_IRQHandler,Default_Handler

  .weak ADC1_2_IRQHandler
  .thumb_set ADC1_2_IRQHandler,Default_Handler

  .weak USB_HP_CAN1_TX_IRQHandler
  .thumb_set USB_HP_CAN1_TX_IRQHandler,Default_Handler

  .weak USB_LP_CAN1_RX0_IRQHandler
  .thumb_set USB_LP_CAN1_RX0_IRQHandler,Default_Handler

  .weak CAN1_RX1_IRQHandler
  .thumb_set CAN1_RX1_IRQHandler,Default_Handler

  .weak CAN1_SCE_IRQHandler
  .thumb_set CAN1_SCE_IRQHandler,Default_Handler

  .weak EXTI9_5_IRQHandler
  .thumb_set EXTI9_5_IRQHandler,Default_Handler

  .weak TIM1_BRK_IRQHandler
  .thumb_set TIM1_BRK_IRQHandler,Default_Handler

  .weak TIM1_UP_IRQHandler
  .thumb_set TIM1_UP_IRQHandler,Default_Handler

  .weak TIM1_TRG_COM_IRQHandler
  .thumb_set TIM1_TRG_COM_IRQHandler,Default_Handler

  .weak TIM1_CC_IRQHandler
  .thumb_set TIM1_CC_IRQHandler,Default_Handler

  .weak TIM2_IRQHandler
  .thumb_set TIM2_IRQHandler,Default_Handler

  .weak TIM3_IRQHandler
  .thumb_set TIM3_IRQHandler,Default_Handler

  .weak TIM4_IRQHandler
  .thumb_set TIM4_IRQHandler,Default_Handler

  .weak I2C1_EV_IRQHandler
  .thumb_set I2C1_EV_IRQHandler,Default_Handler

  .weak I2C1_ER_IRQHandler
  .thumb_set I2C1_ER_IRQHandler,Default_Handler

  .weak I2C2_EV_IRQHandler
  .thumb_set I2C2_EV_IRQHandler,Default_Handler

  .weak I2C2_ER_IRQHandler
  .thumb_set I2C2_ER_IRQHandler,Default_Handler

  .weak SPI1_IRQHandler
  .thumb_set SPI1_IRQHandler,Default_Handler

  .weak SPI2_IRQHandler
  .thumb_set SPI2_IRQHandler,Default_Handler

  .weak USART1_IRQHandler
  .thumb_set USART1_IRQHandler,Default_Handler

  .weak USART2_IRQHandler
  .thumb_set USART2_IRQHandler,Default_Handler

  .weak USART3_IRQHandler
  .thumb_set USART3_IRQHandler,Default_Handler

  .weak EXTI15_10_IRQHandler
  .thumb_set EXTI15_10_IRQHandler,Default_Handler

  .weak RTC_Alarm_IRQHandler
  .thumb_set RTC_Alarm_IRQHandler,Default_Handler

  .weak USBWakeUp_IRQHandler
  .thumb_set USBWakeUp_IRQHandler,Default_Handler

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

编译时： arm-none-eabi-as -mcpu = cortex-m3 -mthumb -g startup_stm32f103xb.s -o startup_stm32f103xb.o，我没有看到＆＃34;反汇编部分.isr_vector＆＃34;在做生成对象的objdump -d时。

为了进行比较，这里有一个类似的[虽然远不那么健壮]的startup.s文件真正写给你的：

.section STACK_INIT
_StackInit:
  .word 0x20005000

.section .isr_vector, "x"
.global _Reset
_Reset:
  .word Reset_Handler       + 1 /* Reset                    */
  .word Default_Handler     + 1 /* Non-Maskable Interrupt   */
  .word Default_Handler     + 1 /* Hard Fault               */
  .word Default_Handler     + 1 /* Memory Manage            */
  .word Default_Handler     + 1 /* Bus Fault                */
  .word Default_Handler     + 1 /* Usage Fault              */
  .word 0x0000                  /* Reserved                 */
  .word 0x0000                  /* Reserved                 */
  .word 0x0000                  /* Reserved                 */
  .word 0x0000                  /* Reserved                 */
  .word Default_Handler     + 1 /* System Service Call      */
  .word Default_Handler     + 1 /* Debug Monitor            */
  .word 0x0000                  /* Reserved                 */
  .word Default_Handler     + 1 /* Pendable System Service  */
  .word Default_Handler     + 1 /* System Tick Timer        */

Reset_Handler:
  BL c_entry
  B .

Default_Handler:
  B .

使用相同的命令编译。当对两个文件执行objdump -d时，.isr_vector部分列在我自己的启动文件中，但它缺少STMicro提供的文件。我认为[希望]这是STMicro破解，生成项目的根本原因。有人可以帮助解释为什么从制造商提供的启动代码中删除了.isr_section吗？

1 个答案:

答案 0 :(得分：1)

  

在执行生成的对象的objdump -d时，我没有看到“反汇编.isr_vector”。

这很正常。 -d标志仅反汇编可执行部分。由于中断向量部分（正确地）未在ST的启动文件中标记为可执行，因此未显示。无论标志如何，都使用objdump -D来反汇编所有部分。

我怀疑您的链接器文件存在问题，导致向量放在错误的地址。您的启动文件可能正在运行，因为它的向量巧合地首先放在文件中;如果是这样，这是脆弱的，将无法可靠地运作。

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