58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/*
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-06-02 Jesven the first version
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*/
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#include <rtthread.h>
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#include <backtrace.h>
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#define BT_NESTING_MAX 100
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static int unwind_frame(struct bt_frame *frame)
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{
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unsigned long fp = frame->fp;
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if ((fp & 0x7)
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#ifdef RT_USING_LWP
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|| fp < KERNEL_VADDR_START
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#endif
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)
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{
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return 1;
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}
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frame->fp = *(unsigned long *)fp;
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frame->pc = *(unsigned long *)(fp + 8);
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return 0;
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}
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static void walk_unwind(unsigned long pc, unsigned long fp)
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{
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struct bt_frame frame;
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unsigned long lr = pc;
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int nesting = 0;
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frame.fp = fp;
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while (nesting < BT_NESTING_MAX)
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{
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rt_kprintf(" %p", (void *)lr);
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if (unwind_frame(&frame))
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{
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break;
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}
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lr = frame.pc;
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nesting++;
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}
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}
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void backtrace(unsigned long pc, unsigned long lr, unsigned long fp)
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{
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rt_kprintf("please use: addr2line -e rtthread.elf -a -f %p", (void *)pc);
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walk_unwind(lr, fp);
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rt_kprintf("\n");
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}
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