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# rCore
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[![CI ](https://github.com/rcore-os/rCore/workflows/CI/badge.svg?branch=master )](https://github.com/rcore-os/rCore/actions)
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Rust version of THU [uCore OS Plus ](https://github.com/chyyuu/ucore_os_plus ).
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Going to be the next generation teaching operating system.
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Supported architectures and boards:
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* x86_64: PC (i5/i7)
* RISCV32/64: HiFive Unleashed, Kendryte K210, [FPGA running Rocket Chip ](https://github.com/jiegec/fpga-zynq )
* AArch64: Raspberry Pi 3B+
* MIPS32: [TrivialMIPS ](https://github.com/Harry-Chen/TrivialMIPS )
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![demo ](./docs/2_OSLab/os2atc/demo.png )
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## Building
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### Environment
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* [Rust ](https://www.rust-lang.org ) toolchain
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* [QEMU ](https://www.qemu.org ) >= 4.1.0
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* [musl-based GCC toolchains ](https://musl.cc/ ) (only for building [user programs ](https://github.com/rcore-os/rcore-user ))
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Setup on Linux or macOS:
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```bash
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$ rustup component add rust-src llvm-tools-preview
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```
Or use Docker container:
```bash
$ docker run -it -v $PWD:$PWD -w $PWD wangrunji0408/rcore
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```
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### How to run
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```bash
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$ git clone https://github.com/rcore-os/rCore.git --recursive
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$ cd rCore/user
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$ make sfsimg prebuilt=1 arch=x86_64
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$ cd ../kernel
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$ make run ARCH=x86_64 LOG=info
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```
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See [Makefile ](kernel/Makefile ) for more usages.
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## Maintainers
| Module | Maintainer |
|--------|-----------------------|
| x86_64 | @wangrunji0408 |
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| RISC-V | @jiegec |
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| ARM (Raspi3) | @equation314 |
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| MIPS | @Harry_Chen @miskcoo |
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| Memory, Process, File System | @wangrunji0408 |
| Network with drivers | @jiegec |
| GUI | @equation314 |
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## History
This is a project of THU courses:
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* [Operating System (2018 Spring) ](http://os.cs.tsinghua.edu.cn/oscourse/OS2018spring/projects/g11 )
* [Comprehensive Experiment of Computer System (2018 Summer) ](http://os.cs.tsinghua.edu.cn/oscourse/csproject2018/group05 )
* [Operating System Train (2018 Autumn) ](http://os.cs.tsinghua.edu.cn/oscourse/OsTrain2018 )
* [Operating System (2019 Spring) ](http://os.cs.tsinghua.edu.cn/oscourse/OS2019spring/projects )
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* [Operating System Train (2019 Autumn) ](http://os.cs.tsinghua.edu.cn/oscourse/OsTrain2019 )
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[Reports ](./docs ) and [Dev docs ](https://rucore.gitbook.io/rust-os-docs/ ) (in Chinese)
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It's based on [BlogOS ](https://github.com/phil-opp/blog_os ) , a demo project in the excellent tutorial [Writing an OS in Rust (First Edition) ](https://os.phil-opp.com/first-edition/ ).
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## License
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The source code is dual-licensed under MIT or the Apache License (Version 2.0).
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## libc-test
### 安装
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直接使用我们的 `user` 子模块即可。如果要自己设置,在 `user` 目录下执行
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```bash
$ git clone git://repo.or.cz/libc-test
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$ rm -r libc-test/.git
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```
### 编译
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考虑到在 rCore 中编译所有测例耗费时间过长,所以选择在本机用 musl-gcc 编译。请确保自己已经安装好了`x86_64-linux-musl-gcc` 工具链,且在 path 中,在 `config.make` 制定了 `CC` 的值。
在本机执行:
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```bash
$ make
$ rm src/*/*.err
```
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随后修改 `user` 目录下的 `Makefile` 文件,将 `libc-test` 打包进入文件系统。
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### 在 rCore 中测试
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进入 `libc-test` 目录,执行脚本
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```bash
$ ash runtest.sh
```
在测试测例前控制台会先打印当前测例名。若测试成功则顺次测试下一个测例,若失败则会打印额外信息,当遇到更严重的错误时可能导致 rCore 卡死或崩溃。例如在测试 `math` 库中的 `sqrt` 时,若测试失败,则输出为
```
run sqrt
sqrt failed
```
在结束后,可前往对应测例所在目录下,通过查看测例所对应的 `.err` 文件查看失败的原因。
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当遇到使得 rCore 崩溃的测例时,手动记录当前测例在 `runtest.sh` 中的位置,手动更新 `user` 中的文件,使其从下一个测例开始测试,并记录中间若干测例的测试结果。如此反复,直到测试过所有测例。
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### 目前测试的结果
- [ ] 尚未通过的测例 (215/473)
- [ ] `pthread` 相关:可能由于缺少相关信号
- [ ] `math` 相关:由于缺少对 `mxcsr` 寄存器的支持,导致获取 `FP Exceptions` 失败,从而无法通过相关测例中对 `FP Exceptions` 的校验。极少数情况出现对于 bad cases 的计算错误。
- [ ] `sync` 相关
具体的测试结果可参考 `user/libc-test/` 目录下的三个 `RECORD.txt` 文件。