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fix recommended commandline for starting zcore-tutorial in README #1

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fix recommended commandline for starting zcore-tutorial in README #1

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -59,7 +59,7 @@ rustc 1.56.0-nightly (08095fc1f 2021-07-26)


#### code/ch04-xx的相关提示
- 推荐运行方式: 在 `ch04-0x` 目录下： `RUST_LOG=info cargo run -p zircon-loader -- /prebuilt/zircon/x64`
- 推荐运行方式: 在 `ch04-0x` 目录下： `RUST_LOG=info cargo run -p zircon-loader -- prebuilt/zircon/x64`
- ch4 会执行 zircon prebuilt 中的 userboot 程序，详见[userboot源码](https://github.com/vsrinivas/fuchsia/tree/master/zircon/kernel/lib/userabi/userboot)，[fuchsia启动流程](https://fuchsia.dev/fuchsia-src/concepts/booting/userboot?hl=en)。
- `ch04-01` 并未实现任何 syscall。因此进入 userboot 后会在第一次 syscall 返回到内核态时 panic 退出。
- `ch04-03` 实现了与 `channel` 和 `debuglog` 有关的部分 syscall，会执行 3 次 syscall 之后由于不支持 process_exit 而退出。
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