a_xx - wlshiu/my_note GitHub Wiki

• ARM64 Linux Kernel and rootfs(busybox or buildroot) via NFS over QEMU with GDB_基于aarch64-linux-gnu架构开发的代码示例-CSDN博客

/home/nfs *(rw,sync,no_subtree_check,all_squash,insecure,anonuid=1000,anongid=1000)

• z_gen_lite_rootfs.sh

#!/bin/bash

cd .../initramfs

initramfs_dir=$(pwd)

file_inittab=${initramfs_dir}/etc/inittab
file_rcS=${initramfs_dir}/etc/init.d/rcS
file_fstab=${initramfs_dir}/etc/fstab

mkdir -p dev etc home lib mnt proc root sys tmp var

echo -e "::sysinit:/etc/init.d/rcS" > ${file_inittab}
echo -e "::respawn:-/bin/sh" >> ${file_inittab}
echo -e "::askfirst:-/bin/sh" >> ${file_inittab}
echo -e "::cttlaltdel:/bin/umount -a -r" >> ${file_inittab}

chmod 755 ${file_inittab}

mkdir -p ${initramfs_dir}/etc/init.d

echo -e "/bin/mount -a # read 'etc/fstab' to hook file-system" > ${file_rcS}
echo -e "mkdir -p /dev/pts" >> ${file_rcS}
echo -e "mount -t devpts devpts /dev/pts" >> ${file_rcS}
echo -e "echo /sbin/mdev > /proc/sys/kernel/hotplug" >> ${file_rcS}
echo -e "/sbin/mdev -s" >> ${file_rcS}
echo -e "echo ==== Welcome Linux ====" >> ${file_rcS}

chmod 755 ${file_rcS}

echo -e "# device mount-point type option dump fsck" > ${file_fstab}
echo -e "proc  /proc proc  defaults 0 0" >> ${file_fstab}
echo -e "temps /tmp  rpoc  defaults 0 0" >> ${file_fstab}
echo -e "none  /tmp  ramfs defaults 0 0" >> ${file_fstab}
echo -e "sysfs /sys  sysfs defaults 0 0" >> ${file_fstab}
echo -e "mdev  /dev  ramfs defaults 0 0" >> ${file_fstab}

cd ${initramfs_dir}/dev

mknod console c 5 1
mknod null c 1 3

cd ${initramfs_dir}

find . | cpio -o -H newc > ${initramfs_dir}/../rootfs.cpio
gzip -c ${initramfs_dir}/../rootfs.cpio > ${initramfs_dir}/../rootfs.cpio.gz