sysHyper

使用rust写的hypervisor, 主要面向mission-critical的设备和系统，参考了JailHouse、RVM等项目。

~/.cargo/config

[build]
target = "aarch64-unknown-none"

[target.aarch64-unknown-linux-gnu]
linker = "aarch64-linux-gnu-gcc"
rustflags = [
    "-C", "link-arg=-nostartfiles -Tlinker.ld",
]

[target.aarch64-unknown-none]
linker = "aarch64-none-elf-gcc"

其中需要安装linker：aarch64-none-elf- 地址：https://developer.arm.com/-/media/Files/downloads/gnu-a/10.3-2021.07/binrel/gcc-arm-10.3-2021.07-x86_64-aarch64-none-elf.tar.xz?rev=9d9808a2d2194b1283d6a74b40d46ada&hash=4E429A41C958483C9DB8ED84B051D010F86BA624

安装rust toolchain：rustup install nightly && rustup default nightly && rustup target add aarch64-unknown-none (optional, we use json config)

apt install gdb-multiarch

编译

make

Qemu

make start

OR

qemu-system-aarch64 \
    -M virt \
    -m 1024M \
    -cpu cortex-a53 \
    -nographic \
    -kernel target/aarch64-unknown-linux-gnu/debug/armv8-baremetal-demo-rust

Qemu调试

qemu-system-aarch64 \
    -M virt \
    -m 1024M \
    -cpu cortex-a53 \
    -nographic \
    -machine virtualization=on \ 
    #-machine secure=on \
    -kernel target/aarch64-unknown-linux-gnu/debug/armv8-baremetal-demo-rust \
    -S -s

然后使用

gdb-multiarch target/aarch64-unknown-linux-gnu/debug/armv8-baremetal-demo-rust

进入gdb 输入：target remote :1234 即开始调试

PS: -machine virtualization=on开启虚拟化，则启用EL2，-machine secure=on，则启用EL3。我们只需要从EL2启动即可。 然后使用aarch64-linux-gnu-gdb -x debug.gdb。qemu默认从EL1启动virt

参考：

1. https://stackoverflow.com/questions/42824706/qemu-system-aarch64-entering-el1-when-emulating-a53-power-up
2. https://stackoverflow.com/questions/31787617/what-is-the-current-execution-mode-exception-level-etc
3. https://github.com/cirosantilli/linux-kernel-module-cheat/tree/35684b1b7e0a04a68987056cb15abd97e3d2f0cc#arm-exception-level

Type 1.5 启动

1. 下载并制作ubuntu镜像，在qemu中启动

make image

2. 在qemu中启动制作好的虚拟机镜像

make qemu

编译GDB for aarch64（未成功）

1. 下载gdb source: https://ftp.gnu.org/gnu/gdb/gdb-13.1.tar.gz
2. tar -xzvf gdb-13.1.tar.gz
3. mkdir build
4. cd $_
5. ../configure --prefix=$PWD --target=aarch64-linux-gnu PS: host填写自己电脑里交叉编译器的前缀，然后configure会自动寻找该前缀的编译器
6. make -j$(nproc) [CFALGS=-static CXXFLAGS=-static]

PS: --target指定要调试的程序的架构 --host指定运行gdb程序的架构

参考： http://ruer.fun/2021/04/20/GDB-%E7%BC%96%E8%AF%91%E6%96%B9%E6%B3%95-2021/

编译qemu（可用）

1. download qemu7.2.source
2. tar 解压
3. mkdir build %% cd build
4. ../qemu-7.2.0/configure --enable-kvm --enable-slirp --enable-debug --target-list=aarch64-softmmu,x86_64-softmmu
5. make -j2