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if ((depth == 2) && regs_saved_lr_is_valid && (pc == buffer[1])) 何时触发？ #59

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YangJun233 opened this issue May 9, 2022 · 1 comment
Open

if ((depth == 2) && regs_saved_lr_is_valid && (pc == buffer[1])) 何时触发？ #59

YangJun233 opened this issue May 9, 2022 · 1 comment

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@YangJun233
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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
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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

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@YangJun233