arm64下基于qemu调试uos-v20-1060-arm64

arm64下基于qemu调试uos-v20-1060-arm64

安装环境

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sudo apt-get install qemu qemu-system-arm qemu-efi qemu-efi-aarch64 virtinst virt-manager virt-viewer
qemu-system-aarch64

制作启动盘

下载镜像

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wget https://cdimage.uniontech.com/daily-iso/1060/professional/daily-stable/20230316-stable/uniontechos-desktop-20-professional-1060-arm64.iso

创建虚拟盘

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mkdir -p ~/code/qemu/arm64/
cd ~/code/qemu/arm64/
qemu-img create -f qcow2 1060.img 64G

安装镜像到虚拟盘

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qemu-system-aarch64 -name guest=uos-v20-1060-arm64,debug-threads=on -machine virt-3.1,accel=kvm,usb=off,dump-guest-core=off,gic-version=3 -cpu host \
-smp 4 -m 4096 \
-bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd \
-drive if=virtio,format=qcow2,file=/home/uos/code/qemu/arm64/1060.img \
-device virtio-scsi-pci,id=scsi0 \
-device virtio-net-pci,netdev=net0 -netdev user,id=net0,hostfwd=tcp::2222-:22 \
-device scsi-cd,drive=cd \
-device virtio-gpu-pci,id=video0 \
-device qemu-xhci -device usb-kbd -device usb-tablet \
-drive if=none,id=cd,format=raw,media=cdrom,readonly,file=/home/uos/Downloads/iso/uniontechos-desktop-20-professional-1060-arm64.iso \
-net none

启动虚拟机

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qemu-system-aarch64 -name guest=uos-v20-1060-arm64,debug-threads=on -machine virt-3.1,accel=kvm,usb=off,dump-guest-core=off,gic-version=3 -cpu host \
-smp 4 -m 4096 \
-bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd \
-drive if=virtio,format=qcow2,file=/home/uos/code/qemu/arm64/1060.img \
-device virtio-scsi-pci,id=scsi0 \
-device virtio-net-pci,netdev=net0 -netdev user,id=net0,hostfwd=tcp::2222-:22 \
-device virtio-gpu-pci,id=video0 \
-device qemu-xhci -device usb-kbd -device usb-tablet

启动时,我们做一下端口转发,我们这里把host的127.0.0.1:2222端口转发到guest的22端口,我们可以使用ssh来连接guest系统。

在宿主机上执行下方命令:

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ssh wujing@127.0.0.1 -p 2222

调试虚拟机

添加仓库源,仓库源位于:sources-list-aarch64.txt

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deb http://pools.uniontech.com/desktop-professional eagle main contrib non-free
deb http://pools.uniontech.com/ppa/dde-eagle eagle/1060 main contrib non-free

在虚拟机中下载内核调试包,三个deb包版本号要保持一致:

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sudo apt purge linux-headers-$(uname -r) linux-image-$(uname -r) linux-image-$(uname -r)-dbg
sudo apt install linux-headers-$(uname -r)=4.19.90-6006 linux-image-$(uname -r)=4.19.90-6006 linux-image-$(uname -r)-dbg=4.19.90-6006

在虚拟机中执行下方命令:

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sudo su
scp /boot/initrd.img-4.19.0-amd64-desktop wujing@10.20.52.86:~/code/tmp/1060
scp /boot/vmlinuz-4.19.0-amd64-desktop wujing@10.20.52.86:~/code/tmp/1060
scp /usr/lib/debug/lib/modules/4.19.0-amd64-desktop/vmlinux wujing@10.20.52.86:~/code/tmp/1060

在宿主机上执行下方命令:

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qemu-system-aarch64 -name guest=uos-v20-1060-arm64,debug-threads=on -machine virt-3.1,accel=kvm,usb=off,dump-guest-core=off,gic-version=3 -cpu host \
-smp 4 -m 4096 \
-bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd \
-kernel ~/code/x86-kernel/arch/x86/boot/bzImage \
-initrd ~/code/tmp/1060/initrd.img-4.19.0-amd64-desktop \
-hda ~/code/tmp/1060/1060.img \
-append "root=/dev/sda5 ro splash quiet DEEPIN_GFXMODE= ima_appraise=off security=selinux checkreqprot=1 libahci.ignore_sss=1 nokaslr" \
-net user,hostfwd=tcp::2222-:22 -net nic \
-S -s

上方 -append传递给内核的参数可以通过在启动时,访问 GRUB 启动菜单,按 e键编辑引导参数可以看到参数,也可虚拟机启动后通过 cat /proc/cmdline查看。

~/code/tmp/1060目录下启动gdb:

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aarch64-linux-gdb vmlinux
target remote :1234
hb start_kernel
c

uos-v20-1060内核第一个断点必须设置为硬件断点,否则gdb输出如下Warning且无法捕捉断点:

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Warning:
Cannot insert breakpoint 1.
Cannot access memory at address 0xffffffff824bbb8d

Command aborted.

c命令输出如下:

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Thread 1 hit Breakpoint 1, start_kernel () at init/main.c:531
531 init/main.c: 没有那个文件或目录.

很明显找不到源码,解决方案有两种:

  1. gdb中使用 dir命令或 set substitute-path命令指定和修改搜素源码文件的路径
  2. 基于源码编译出内核,在源码目录执行 aarch64-linux-gdb vmlinux命令。

下文采用方案2:

下载1060-2源码:

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git clone "ssh://ut004487@gerrit.uniontech.com:29418/kernel/arm-kernel" && scp -p -P 29418 ut004487@gerrit.uniontech.com:hooks/commit-msg "arm-kernel/.git/hooks/"
git checkout -b develop/need_merge need_merge

内核编译选项配置参考:内核编译选项配置

内核编译完成后启动虚拟机:

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qemu-system-aarch64 -name guest=uos-v20-1060-arm64,debug-threads=on -machine virt-3.1,accel=kvm,usb=off,dump-guest-core=off,gic-version=3 -cpu host \
-smp 4 -m 4096 \
-bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd \
-kernel ~/code/x86-kernel/arch/x86/boot/bzImage \
-initrd ~/code/tmp/1060/initrd.img-4.19.0-amd64-desktop \
-hda ~/code/tmp/1060/1060.img \
-append "root=/dev/sda5 ro splash quiet DEEPIN_GFXMODE= ima_appraise=off security=selinux checkreqprot=1 libahci.ignore_sss=1 nokaslr" \
-net user,hostfwd=tcp::2222-:22 -net nic \
-S -s

~/code/arm-kernel目录下启动gdb:

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aarch64-linux-gdb vmlinux
target remote :1234
hb start_kernel
c

c命令输出如下:

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Thread 1 hit Breakpoint 1, start_kernel () at init/main.c:531
531 {

可以看到断点正常命中,继续敲 c命令可以看到虚拟机正常启动到登录界面。

More


arm64下基于qemu调试uos-v20-1060-arm64
https://realwujing.github.io/linux/kernel/qemu/arm64下基于qemu调试uos-v20-1060-arm64/
作者
Wu Jing
发布于
2023年4月19日
许可协议