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