CmBacktrace icon indicating copy to clipboard operation
CmBacktrace copied to clipboard
verified publisher icon armink

if ((depth == 2) && regs_saved_lr_is_valid && (pc == buffer[1])) 何时触发？

Open YangJun233 opened this issue 3 years ago • 1 comments

硬件错误中断中，调用print_call_stack前，sp已经减去了R0~R3, R12, LR,PC,xPSR这些寄存器地址，不明白if ((depth == 2) && regs_saved_lr_is_valid && (pc == buffer[1])) 何时才会被触发？ 感谢解惑！😃

YangJun233 avatar May 09 '22 10:05 YangJun233

想明白了，进入函数lr自动入栈一次，进入硬件错误中断lr再次入栈一次，所以有可能是两次lr入栈

YangJun233 avatar May 09 '22 10:05 YangJun233