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125 lines
2.7 KiB
125 lines
2.7 KiB
/*
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* Copyright (c) 2006-2023, 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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* 2023-10-18 Shell Add backtrace support
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*/
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#define DBG_TAG "hw.backtrace"
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#define DBG_LVL DBG_INFO
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#include <rtdbg.h>
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#include <rtthread.h>
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#include <mm_aspace.h>
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#include "riscv_mmu.h"
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#define WORD sizeof(rt_base_t)
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#define ARCH_CONTEXT_FETCH(pctx, id) (*(((unsigned long *)pctx) + (id)))
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rt_inline rt_err_t _bt_kaddr(rt_ubase_t *fp, struct rt_hw_backtrace_frame *frame)
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{
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rt_err_t rc;
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frame->fp = *(fp - 2);
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frame->pc = *(fp - 1);
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if ((rt_ubase_t)fp == frame->fp)
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{
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rc = -RT_ERROR;
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}
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else
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{
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rc = RT_EOK;
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}
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return rc;
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}
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#ifdef RT_USING_SMART
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#include <lwp_arch.h>
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#include <lwp_user_mm.h>
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rt_inline rt_err_t _bt_uaddr(rt_lwp_t lwp, rt_ubase_t *fp, struct rt_hw_backtrace_frame *frame)
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{
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rt_err_t rc;
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if (lwp_data_get(lwp, &frame->fp, fp - 2, WORD) != WORD)
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{
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rc = -RT_EFAULT;
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}
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else if (lwp_data_get(lwp, &frame->pc, fp - 1, WORD) != WORD)
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{
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rc = -RT_EFAULT;
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}
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else if ((rt_ubase_t)fp == frame->fp)
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{
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rc = -RT_ERROR;
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}
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else
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{
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frame->pc -= 0;
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rc = RT_EOK;
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}
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return rc;
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}
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#endif /* RT_USING_SMART */
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rt_err_t rt_hw_backtrace_frame_unwind(rt_thread_t thread, struct rt_hw_backtrace_frame *frame)
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{
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rt_err_t rc = -RT_ERROR;
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rt_ubase_t *fp = (rt_ubase_t *)frame->fp;
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if (fp && !((long)fp & 0x7))
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{
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#ifdef RT_USING_SMART
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if (thread->lwp)
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{
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void *lwp = thread->lwp;
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void *this_lwp = lwp_self();
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if (this_lwp == lwp && rt_hw_mmu_v2p(((rt_lwp_t)lwp)->aspace, fp) != ARCH_MAP_FAILED)
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{
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rc = _bt_kaddr(fp, frame);
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}
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else if (lwp_user_accessible_ext(lwp, (void *)fp, WORD))
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{
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rc = _bt_uaddr(lwp, fp, frame);
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}
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else
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{
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rc = -RT_EFAULT;
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}
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}
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else
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#endif
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if ((rt_kmem_v2p(fp) != ARCH_MAP_FAILED))
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{
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rc = _bt_kaddr(fp, frame);
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}
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else
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{
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rc = -RT_EINVAL;
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}
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}
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else
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{
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rc = -RT_EFAULT;
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}
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return rc;
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}
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rt_err_t rt_hw_backtrace_frame_get(rt_thread_t thread, struct rt_hw_backtrace_frame *frame)
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{
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rt_err_t rc;
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if (!thread || !frame)
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{
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rc = -RT_EINVAL;
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}
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else
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{
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frame->pc = ARCH_CONTEXT_FETCH(thread->sp, 13);
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frame->fp = ARCH_CONTEXT_FETCH(thread->sp, 12);
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rc = RT_EOK;
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}
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return rc;
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}
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