c - 硬故障处理 - Arm Cortex-M0

Question

我在为具有 ARM CortexM0 的 NRF51 创建硬故障处理程序时遇到一些困难。

(注意:以下代码是从互联网上的不同来源组合而来的) 这是我到目前为止所拥有的:

    static 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]);

    for(;;);
}

void HardFault_Handler(void)
{
    asm volatile(  
        "movs r0, #4\t\n"  
        "mov  r1, lr\t\n"  
        "tst  r0, r1\t\n" /* Check EXC_RETURN[2] */  
        "beq 1f\t\n"  
        "mrs r0, psp\t\n"  
        "ldr r1,=hard_fault_handler_c\t\n"  
        "bx r1\t\n"  
        "1:mrs r0,msp\t\n"  
        "ldr r1,=hard_fault_handler_c\t\n"  
        : /* no output */  
        : /* no input */  
        : "r0" /* clobber */  
    );  
}

编译时出现错误如下: 构建目标:project.elf 调用:跨ARM C++链接器 C:\Users\Steven\AppData\Local\Temp\ccuAgDyP.ltrans9.ltrans.o:在函数 HardFault_Handler': <artificial>:(.text.HardFault_Handler+0x18): undefined reference to 中硬故障处理程序c' collect2.exe:错误:ld 返回 1 退出状态 make: *** [FruityMesh.elf] 错误 1 makefile:65: 目标“project.elf”的配方失败

总之，链接器似乎无法找到 Hard_fault_handler_c 函数的地址。我认为我需要编写程序集来导入或包含此函数的路径，但这只是我的建议。我无法为 M0 编写汇编来进行编译。

谢谢

Answer 1

我建议升级到version 11 NRF SDK 的版本，它添加了对硬故障处理程序的内置支持(请参阅 nRF5_SDK_11.0.0_89a8197/components/libraries/hardfault)。