backtrace.c
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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2008-07-29 Bernard first version from QiuYi implementation
*/
#include <rtthread.h>
#ifdef __GNUC__
/*
-->High Address,Stack Top
PC<------|
LR |
IP |
FP |
...... |
PC <-| |
LR | |
IP | |
FP---|-- |
...... |
PC |
LR |
IP |
FP---
-->Low Address,Stack Bottom
*/
void rt_hw_backtrace(rt_uint32_t *fp, rt_uint32_t thread_entry)
{
rt_uint32_t i, pc, func_entry;
pc = *fp;
rt_kprintf("[0x%x]\n", pc-0xC);
for(i=0; i<10; i++)
{
fp = (rt_uint32_t *)*(fp - 3);
pc = *fp ;
func_entry = pc - 0xC;
if(func_entry <= 0x30000000) break;
if(func_entry == thread_entry)
{
rt_kprintf("EntryPoint:0x%x\n", func_entry);
break;
}
rt_kprintf("[0x%x]\n", func_entry);
}
}
#else
void rt_hw_backtrace(rt_uint32_t *fp, rt_uint32_t thread_entry)
{
/* old compiler implementation */
}
#endif