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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#include <rtthread.h>
#ifdef RT_USING_SMART
#include <lwp_arch.h>
#define TRANCE_LEVEL 20
extern rt_ubase_t __text_start[];
extern rt_ubase_t __text_end[];
static char *_get_elf_name(size_t sepc);
void rt_hw_backtrace(rt_uint32_t *ffp, rt_ubase_t sepc)
{
rt_ubase_t *ra;
rt_ubase_t *fp;
rt_ubase_t vas, vae;
int i, j;
rt_kprintf("riscv64-unknown-linux-musl-addr2line -e %s -a -f", _get_elf_name(sepc));
fp = (rt_ubase_t *)ffp;
if (!fp)
{
asm volatile("mv %0, s0"
: "=r"(fp));
}
if (sepc)
{
rt_kprintf(" %p", sepc - 0x4);
}
if (fp > (rt_ubase_t *)USER_VADDR_START && fp < (rt_ubase_t *)USER_VADDR_TOP)
{
vas = USER_VADDR_START;
vae = USER_VADDR_TOP;
}
else
{
vas = (rt_ubase_t)&__text_start;
vae = (rt_ubase_t)&__text_end;
}
for (i = j = 0; i < TRANCE_LEVEL; i++)
{
if (RT_ALIGN((rt_ubase_t)fp, sizeof(void *)) != (rt_ubase_t)fp)
{
break;
}
ra = fp - 1;
if (!rt_kmem_v2p(ra) || *ra < vas || *ra > vae)
break;
rt_kprintf(" %p", *ra - 0x04);
fp = fp - 2;
if (!rt_kmem_v2p(fp))
break;
fp = (rt_ubase_t *)(*fp);
if (!fp)
break;
}
rt_kputs("\r\n");
}
static void _assert_backtrace_cb(const char *ex, const char *func, rt_size_t line)
{
rt_hw_interrupt_disable();
rt_kprintf("(%s) assertion failed at function:%s, line number:%d \n", ex, func, line);
rt_hw_backtrace(0, 0);
rt_hw_cpu_shutdown();
}
static int rt_hw_backtrace_init(void)
{
rt_assert_set_hook(_assert_backtrace_cb);
return 0;
}
INIT_BOARD_EXPORT(rt_hw_backtrace_init);
static void backtrace_test(int args, char *argv[])
{
int *p = (void *)-1;
init_fn_t ft = 0;
if (args < 2)
{
rt_kprintf("backtrace_test usage:backtrace_test a(assert)/m(invalid memory)/i(illegal instruction)\r\n");
return;
}
if (!rt_strcmp(argv[1], "a"))
{
rt_kprintf("Assert test:\r\n", argv[1]);
RT_ASSERT(0);
}
else if (!rt_strcmp(argv[1], "m"))
{
rt_kprintf("Access invalid memory:\r\n", argv[1]);
*p = 0;
}
else if (!rt_strcmp(argv[1], "i"))
{
rt_kprintf("Illegal instruction:\r\n", argv[1]);
ft();
}
else
{
rt_kprintf("Unknown cmd :%s.\r\n", argv[1]);
}
}
MSH_CMD_EXPORT(backtrace_test, backtrace test case);
extern struct rt_thread *rt_current_thread;
#define IN_USERSPACE (sepc > USER_VADDR_START && sepc < USER_VADDR_TOP)
static char *_get_elf_name(size_t sepc)
{
return IN_USERSPACE ? rt_current_thread->name : "rtthread.elf";
}
#endif /* RT_USING_SMART */
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