[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS/Test/CBMC/README.md

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+CBMC Proof Infrastructure
+=========================
+
+This directory contains automated proofs of the memory safety of various parts
+of the FreeRTOS codebase. A continuous integration system validates every
+pull request posted to the repository against these proofs, and developers can
+also run the proofs on their local machines.
+
+The proofs are checked using the
+[C Bounded Model Checker](http://www.cprover.org/cbmc/), an open-source static
+analysis tool
+([GitHub repository](https://github.com/diffblue/cbmc)). This README describes
+how to run the proofs on your local clone of FreeRTOS.
+
+
+Building and running proofs
+--------------------------
+
+Currently, only python based builds are supported for the CBMC proofs. The proofs
+can be run on Linux and MacOS. Windows users can use [WSL](https://docs.microsoft.com/en-us/windows/wsl).
+The below section outlines the instructions for the Python based build.
+
+### Prerequisites
+
+On Windows, you can install WSL using these simple [instructions](https://docs.microsoft.com/en-us/windows/wsl/install).
+
+You will need Python version >= 3.7.
+And you will need Make to build and run the proofs.
+
+If you are running on a 64-bit machine, please install the 32-bit version of gcc
+libraires. For example, on linux, one would run the following command to install
+the libraries: `sudo apt-get install gcc-multilib`
+
+### Installing CBMC
+
+- The latest installation instructions can be found on the
+  [releases](https://github.com/diffblue/cbmc/releases) page of the CBMC repository.
+
+- Please follow all the installation instructions given for your platform.
+
+- Ensure that you can run the programs `cbmc`, `goto-cc` (or `goto-cl`
+  on Windows), and `goto-instrument` from the command line. If you cannot run these
+  commands, please refer to the above instructions to install CBMC.
+
+### Installing CBMC-viewer (to generate the report)
+
+- The latest installation instructions can be found on the
+  [releases](https://github.com/awslabs/aws-viewer-for-cbmc/releases) page of the CBMC-viewer repository.
+
+- Please follow all the installation instructions given for your platform.
+
+- Ensure that you can run the programs `cbmc-viewer`. If not, please verify
+  that all instructions above have been followed.
+
+### Setting up the proofs
+
+Make sure that all the submodules of the FreeRTOS repository have been cloned. To
+clone all the submodules, go to the root of the FreeRTOS repository and run this
+command: `git submodule update --init --recursive --checkout`.
+
+Change into the `proofs` directory and run
+```
+python3 prepare.py
+```
+If you are on a Windows machine but want to generate Linux Makefiles (or vice
+versa), you can pass the `--system linux` or `--system windows` options to those
+programs.
+
+### Running the proofs
+
+Each of the leaf directories under `proofs` is a proof of the memory
+safety of a single entry point in FreeRTOS. The scripts that you ran in the
+previous step will have left a Makefile in each of those directories. To
+run a proof, change into the directory for that proof and run `make`.
+The proofs may take some time to run; they eventually write their output to
+`cbmc.txt`, which should have the text `VERIFICATION SUCCESSFUL` at the end.
+
+The make command will also generate a report in html and json format which makes
+understanding the failures easier.
+
+### Proof directory structure
+
+This directory contains the following subdirectories:
+
+- `proofs` contains the proofs run against each pull request
+- `patches` contains a set of patches that get applied to the codebase prior to
+  running the proofs. The patches are used to remove static and volatile qulaifiers
+  from the source.
+- `include` and `windows` contain header files used by the proofs.