在启动文件中修改
IMPORT rt_hw_hard_fault_exceptionEXPORT HardFault_Handler
HardFault_Handler PROC; get current contextTST lr, #0x04 ; if(!EXC_RETURN[2])ITE EQMRSEQ r0, msp ; [2]=0 ==> Z=1, get fault context from handler.MRSNE r0, psp ; [2]=1 ==> Z=0, get fault context from thread.STMFD r0!, {r4 - r11} ; push r4 - r11 registerSTMFD r0!, {lr} ; push exec_return registerTST lr, #0x04 ; if(!EXC_RETURN[2])ITE EQMSREQ msp, r0 ; [2]=0 ==> Z=1, update stack pointer to MSP.MSRNE psp, r0 ; [2]=1 ==> Z=0, update stack pointer to PSP.PUSH {lr}BL rt_hw_hard_fault_exceptionPOP {lr}ORR lr, lr, #0x04BX lrENDP 
调用的硬件中断函数
#define rt_uint32_t unsigned int
struct exception_info
{rt_uint32_t exc_return;rt_uint32_t r4;rt_uint32_t r5;rt_uint32_t r6;rt_uint32_t r7;rt_uint32_t r8;rt_uint32_t r9;rt_uint32_t r10;rt_uint32_t r11;rt_uint32_t r0;rt_uint32_t r1;rt_uint32_t r2;rt_uint32_t r3;rt_uint32_t r12;rt_uint32_t lr;rt_uint32_t pc;rt_uint32_t psr;
};/** fault exception handler*/
void rt_hw_hard_fault_exception(struct exception_info * exception_info)
{unsigned int *app_sp;int i;app_sp = (unsigned int *)(exception_info + 1); /* context + 16*4 */printf("psr: 0x%08x\r\n", exception_info->psr);printf("r00: 0x%08x\r\n", exception_info->r0);printf("r01: 0x%08x\r\n", exception_info->r1);printf("r02: 0x%08x\r\n", exception_info->r2);printf("r03: 0x%08x\r\n", exception_info->r3);printf("r04: 0x%08x\r\n", exception_info->r4);printf("r05: 0x%08x\r\n", exception_info->r5);printf("r06: 0x%08x\r\n", exception_info->r6);printf("r07: 0x%08x\r\n", exception_info->r7);printf("r08: 0x%08x\r\n", exception_info->r8);printf("r09: 0x%08x\r\n", exception_info->r9);printf("r10: 0x%08x\r\n", exception_info->r10);printf("r11: 0x%08x\r\n", exception_info->r11);printf("r12: 0x%08x\r\n", exception_info->r12);printf(" lr: 0x%08x\r\n", exception_info->lr);printf(" pc: 0x%08x\r\n", exception_info->pc);printf("stacks: \r\n");i = 0;for (i = 0; i < 1024; ){printf("%08x ", *app_sp);app_sp++;i++;if (i % 16 == 0)printf("\r\n");}printf("\r\n");while (1);
} 
fromelf --text -a -c --output=xxx.dis Objects\xxx.axf
