定位ARM Hard Fault 的方法

hansonhe

定位ARM Hard Fault 的方法 [复制链接]

 

1，  用Keil的话，可以做如下操作：

先将fault中断函数的内容改为:

 

HardFault_Handler\

                PROC

                ;EXPORT  HardFault_Handler         [WEAK]

                ;B                  .

                                IMPORT hard_fault_handler_c  

                                TST LR, #4  

                                ITE EQ  

                                MRSEQ R0, MSP  

                                MRSNE R0, PSP  

                                B hard_fault_handler_c  

                ENDP

 

 

然后在源程序里添加下面的函数代码:

// hard fault handler in C,  

// with stack frame location as input parameter  

void hard_fault_handler_c(unsigned int * hardfault_args)  

{  

unsigned int stacked_r0;  

unsigned int stacked_r1;  

unsigned int stacked_r2;  

unsigned int stacked_r3;  

unsigned int stacked_r12;  

unsigned int stacked_lr;  

unsigned int stacked_pc;  

unsigned int stacked_psr;  

 

stacked_r0 = ((unsigned long) hardfault_args[0]);  

stacked_r1 = ((unsigned long) hardfault_args[1]);  

stacked_r2 = ((unsigned long) hardfault_args[2]);  

stacked_r3 = ((unsigned long) hardfault_args[3]);  

 

stacked_r12 = ((unsigned long) hardfault_args[4]);  

stacked_lr = ((unsigned long) hardfault_args[5]);  

stacked_pc = ((unsigned long) hardfault_args[6]);  

stacked_psr = ((unsigned long) hardfault_args[7]);  

 

printf ("[Hard fault handler]\n");  

printf ("R0 = %x\n", stacked_r0);  

printf ("R1 = %x\n", stacked_r1);  

printf ("R2 = %x\n", stacked_r2);  

printf ("R3 = %x\n", stacked_r3);  

printf ("R12 = %x\n", stacked_r12);  

printf ("LR = %x\n", stacked_lr);  

printf ("PC = %x\n", stacked_pc);  

printf ("PSR = %x\n", stacked_psr);  

printf ("BFAR = %x\n", (*((volatile unsigned long *)(0xE000ED38))));  

printf ("CFSR = %x\n", (*((volatile unsigned long *)(0xE000ED28))));  

printf ("HFSR = %x\n", (*((volatile unsigned long *)(0xE000ED2C))));  

printf ("DFSR = %x\n", (*((volatile unsigned long *)(0xE000ED30))));  

printf ("AFSR = %x\n", (*((volatile unsigned long *)(0xE000ED3C))));  

 

   

while(1)

{

        ;;

}

 

}  

 

如果使用调试器,则可以在第一个printf处设置断点.没有的话看串口打印结果

通过查看stacked_lr的内容可以知道程序运行到哪个位置出现fault

然后查看编译后汇编代码,可以知道源程序是哪个函数哪一步出现问题,

配合其它寄存器的内容来分析找出原因

 

 

2．用IAR的话，把startup_ewarm.c文件中的FaultISR（）函数的内容改为：

volatile unsigned int stacked_r0;  

volatile unsigned int stacked_r1;  

volatile unsigned int stacked_r2;  

volatile unsigned int stacked_r3;  

volatile unsigned int stacked_r12;  

volatile unsigned int stacked_lr;  

volatile unsigned int stacked_pc;  

volatile unsigned int stacked_psr;  

 

//unsigned long cc;

 

stacked_r0 = ((unsigned long) hardfault_args[0]);  

stacked_r1 = ((unsigned long) hardfault_args[1]);  

stacked_r2 = ((unsigned long) hardfault_args[2]);  

stacked_r3 = ((unsigned long) hardfault_args[3]);  

 

stacked_r12 = ((unsigned long) hardfault_args[4]);  

stacked_lr = ((unsigned long) hardfault_args[5]);  

stacked_pc = ((unsigned long) hardfault_args[6]);  

stacked_psr = ((unsigned long) hardfault_args[7]);  

 

 

 

printf ("[Hard fault handler]\n");  

printf ("R0 = %x\n", stacked_r0);  

printf ("R1 = %x\n", stacked_r1);  

printf ("R2 = %x\n", stacked_r2);  

printf ("R3 = %x\n", stacked_r3);  

printf ("R12 = %x\n", stacked_r12);  

printf ("LR = %x\n", stacked_lr);  

printf ("PC = %x\n", stacked_pc);  

printf ("PSR = %x\n", stacked_psr);  

printf ("BFAR = %x\n", (*((volatile unsigned long *)(0xE000ED38))));  

printf ("CFSR = %x\n", (*((volatile unsigned long *)(0xE000ED28))));  

printf ("HFSR = %x\n", (*((volatile unsigned long *)(0xE000ED2C))));  

printf ("DFSR = %x\n", (*((volatile unsigned long *)(0xE000ED30))));  

printf ("AFSR = %x\n", (*((volatile unsigned long *)(0xE000ED3C))));  

 

   

  while(1)

  {

          ;;

  }

如果使用调试器,则可以在第一个printf处设置断点.没有的话看串口打印结果

通过查看stacked_lr的内容可以知道程序运行到哪个位置出现fault

然后查看编译后汇编代码,可以知道源程序是哪个函数哪一步出现问题,

配合其它寄存器的内容来分析找出原因

Triton.zhang

这个有用，赞一个

shower.xu

很感谢，处理无头绪的问题很有用

zca123

mark，以后可能会用到

huangsjtu

fendou

谢谢

zhangdaoyu

看着这些代码让人兴奋。

azhiking

IAR下面 hardfault_args怎么定义啊？

蓝雨夜

IAR下面 hardfault_args怎么定义啊

mastergan

这个帖子完全copy了我原创的博客，不注明出处还说是原创的～～
汗！！
这个方法和帖子的部分内容我早在2008年就发表在ouravr.com :
http://www.amobbs.com/thread-2013982-1-1.html

后来在2011年整理成博客文章，原文在这里：http://hi.baidu.com/mastergan/item/046bebd0cb7e889b270ae715

欢迎楼主转贴，但请请注明出处！

nanfanglao@163

知道了寄存器内容也找不出原因啊.

Linchpin

ccs呢？？