sync branch rt-smart. (#6641)

* Synchronize the code of the rt mart branch to the master branch.
  * TTY device
  * Add lwP code from rt-smart
  * Add vnode in DFS, but DFS will be re-write for rt-smart
  * There are three libcpu for rt-smart:
    * arm/cortex-a, arm/aarch64
    * riscv64

Co-authored-by: Rbb666 <[email protected]>
Co-authored-by: zhkag <[email protected]>

1 files changed, 0 insertions, 63 deletions

diff --git a/libcpu/arm/common/backtrace.c b/libcpu/arm/common/backtrace.c
deleted file mode 100644
index bf3526703e..0000000000
--- a/libcpu/arm/common/backtrace.c
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * 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