# rcore

**Repository Path**: MetaDatas/rcore

## Basic Information

- **Project Name**: rcore
- **Description**: 清华三叶草操作系统
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2023-11-08
- **Last Updated**: 2024-03-07

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## 环境搭建

```bash
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install git build-essential gdb-multiarch qemu-system-misc gcc-riscv64-linux-gnu binutils-riscv64-linux-gnu
```

```bash
rustup install nightly
rustup default nightly
```

```toml
[source.crates-io]
registry = "https://github.com/rust-lang/crates.io-index"
replace-with = 'ustc'
[source.ustc]
registry = "git://mirrors.ustc.edu.cn/crates.io-index"
```

```toml
[source.crates-io]
replace-with = 'tuna'

[source.tuna]
registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"
```

```bash
rustup target add riscv64gc-unknown-none-elf
cargo install cargo-binutils
rustup component add llvm-tools-preview
rustup component add rust-src
```

```bash
sudo apt install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev \
              gawk build-essential bison flex texinfo gperf libtool patchutils bc \
              zlib1g-dev libexpat-dev pkg-config  libglib2.0-dev libpixman-1-dev libsdl2-dev \
              git tmux python3 python3-pip ninja-build
```

## 常用工具

objcopy/objdump/readelf

## 可执行文件生成汇编

```shell
#通常办法，生成的汇编代码有比较冗余的信息
#生成缺省debug模式的汇编
cargo rustc -- --emit asm
ls target/debug/deps/<crate_name>-<hash>.s
#生成release模式的汇编
cargo rustc --release -- --emit asm
ls target/release/deps/<crate_name>-<hash>.s
#在rcore-tutorial-v3中的应用的汇编代码生成举例
cd user
cargo  rustc --release --bin hello_world -- --emit asm
find ./target -name "hello_world*.s"

#生成更加干净的汇编代码
#基于 cargo-show-asm(https://github.com/pacak/cargo-show-asm)的办法
#如果没用安装这个cargo asm子命令，就安装它
cargo install cargo-show-asm
#在rcore-tutorial-v3中的应用的汇编代码生成举例
cd user
cargo  asm  --release --bin hello_world

Compiling user_lib v0.1.0 (/home/chyyuu/thecodes/rCore-Tutorial-v3/user)
 Finished release [optimized + debuginfo] target(s) in 0.10s

     .section .text.main,"ax",@progbits
             .globl  main
             .p2align        1
             .type   main,@function
     main:

             .cfi_sections .debug_frame
             .cfi_startproc
             addi sp, sp, -64
             .cfi_def_cfa_offset 64

             sd ra, 56(sp)
             sd s0, 48(sp)
             .cfi_offset ra, -8
             .cfi_offset s0, -16
             addi s0, sp, 64
             .cfi_def_cfa s0, 0

             auipc a0, %pcrel_hi(.L__unnamed_1)
             addi a0, a0, %pcrel_lo(.LBB0_1)

             sd a0, -64(s0)
             li a0, 1

             sd a0, -56(s0)
             sd zero, -48(s0)

             auipc a0, %pcrel_hi(.L__unnamed_2)
             addi a0, a0, %pcrel_lo(.LBB0_2)

             sd a0, -32(s0)
             sd zero, -24(s0)

             addi a0, s0, -64

             call user_lib::console::print
             li a0, 0
             ld ra, 56(sp)
             ld s0, 48(sp)
             addi sp, sp, 64
             ret
```