用qemu搭建aarch64學習環境
http://www.zhimengzhe.com/linux/224269.html
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- defconfig menuconfig Image
start_vm.sh
#!/bin/sh
qemu-system-aarch64 \
-M virt \
-cpu cortex-a53 \
-smp 2 \
-m 256M \
-kernel /media/hugo/kston/source/linux-stable/arch/arm64/boot/Image \
-append "root=/dev/ram0 rw rootfstype=ext4 console=ttyAMA0 init=/linuxrc ignore_loglevel" \
-initrd /media/hugo/kston/source/tools/fs/ramdisk.img \
-nographic \
-device e1000,netdev=dev0,mac='00:10:4c:00:22:ee' \
-netdev tap,ifname=tap0,id=dev0,script=no,downscript=no
mkfs.sh
#!/bin/bash
sudo rm -rf rootfs
sudo rm -rf tmpfs
sudo rm -rf ramdisk*
sudo mkdir rootfs
sudo cp /media/hugo/kston/source/busybox-1.30.1/_install/* rootfs/ -raf
sudo mkdir -p rootfs/proc/
sudo mkdir -p rootfs/sys/
sudo mkdir -p rootfs/tmp/
sudo mkdir -p rootfs/root/
sudo mkdir -p rootfs/var/
sudo mkdir -p rootfs/mnt/
sudo cp initfs/etc rootfs/ -arf
sudo cp initfs/sbin rootfs/ -arf
sudo cp initfs/bin rootfs/ -arf
sudo mkdir -p rootfs/lib
sudo cp -arf /usr/aarch64-linux-gnu/lib/* rootfs/lib/
sudo rm rootfs/lib/*.a
sudo /usr/bin/aarch64-linux-gnu-strip rootfs/lib/*
sudo cp initfs/lib rootfs/ -arf
sudo mkdir -p rootfs/dev/
sudo mknod rootfs/dev/tty1 c 4 1
sudo mknod rootfs/dev/tty2 c 4 2
sudo mknod rootfs/dev/tty3 c 4 3
sudo mknod rootfs/dev/tty4 c 4 4
sudo mknod rootfs/dev/console c 5 1
sudo mknod rootfs/dev/ram0 b 1 0
sudo mknod rootfs/dev/null c 1 3
sudo dd if=/dev/zero of=ramdisk bs=1M count=16
sudo mkfs.ext4 -F ramdisk
sudo mkdir -p tmpfs
sudo mount -t ext4 ramdisk ./tmpfs/ -o loop
sudo cp -raf rootfs/* tmpfs/
sudo umount tmpfs
sudo gzip --best -c ramdisk > ramdisk.gz
sudo mkimage -n "ramdisk" -A arm -O linux -T ramdisk -C gzip -d ramdisk.gz ramdisk.img
fstab文件
cgroup /sys/fs/cgroup/ nodev 0 0
rcS文件
#!/bin/sh
mount -t proc proc /proc
mount -t sysfs sysfs /sys
mount -t tmpfs tmpfs /sys/fs/cgroup/
mkdir /sys/fs/cgroup/blkio
mkdir /sys/fs/cgroup/blk
mkdir /sys/fs/cgroup/cpu,cpuacct
mkdir /sys/fs/cgroup/cpuset
mkdir /sys/fs/cgroup/devices
mkdir /sys/fs/cgroup/freezer
mkdir /sys/fs/cgroup/hugetlb
mkdir /sys/fs/cgroup/memory
mkdir /sys/fs/cgroup/net_cls,net_prio
mkdir /sys/fs/cgroup/perf_event
mkdir /sys/fs/cgroup/pids
mkdir /sys/fs/cgroup/rama
mkdir /sys/fs/cgroup/rdma
mkdir /sys/fs/cgroup/systemd
mkdir /sys/fs/cgroup/unified
cd /sys/fs/cgroup/
ln -s cpu,cpuacct cpu
ln -s cpu,cpuacct cpuacct
ln -s net_cls,net_prio net_cls
ln -s net_cls,net_prio net_prio
[ 3.692809] VFS: Cannot open root device "ram0" or unknown-block(0,0): error -6
[ 3.681683] uart-pl011 9000000.pl011: no DMA platform data
[ 3.692809] VFS: Cannot open root device "ram0" or unknown-block(0,0): error -6
[ 3.698246] Please append a correct "root=" boot option; here are the available partitions:
[ 3.700281] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 3.702569] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.16.8 #5
[ 3.703885] Hardware name: linux,dummy-virt (DT)
[ 3.707895] Call trace:
[ 3.708541] dump_backtrace+0x0/0x1c0
[ 3.709452] show_stack+0x14/0x20
[ 3.710532] dump_stack+0x9c/0xbc
[ 3.711323] panic+0x130/0x2a0
[ 3.712097] mount_block_root+0x1a0/0x28c
[ 3.717135] mount_root+0x130/0x164
[ 3.719369] prepare_namespace+0x138/0x180
[ 3.719975] kernel_init_freeable+0x208/0x22c
[ 3.720353] kernel_init+0x10/0x108
[ 3.720671] ret_from_fork+0x10/0x18
[ 3.721302] SMP: stopping secondary CPUs
[ 3.725707] Kernel Offset: disabled
[ 3.733074] CPU features: 0x0802004
[ 3.733925] Memory Limit: none
[ 3.734924] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
是因爲在內核配置不對，沒有配置支持ram blockdevice
出現下面問題，是因爲libssl-dev沒有安裝，後來安裝libssl-dev有問題，可能是package依賴的問題
scripts/extract-cert.c:21:10: fatal error: openssl/bio.h: No such file or directory
安裝libssl-dev出現問題：
The following packages have unmet dependencies:
libssl1.0-dev : Depends: libssl1.0.0 (= 1.0.2n-1ubuntu5) but 1.0.2n-1ubuntu5.1 is to be installed
E: Unable to correct problems, you have held broken packages.
然後卸載軟件包重新安裝就好了：
sudo apt remove libssl1.0.0
sudo apt install libssl1.0-dev
然後就可以編譯通過了