Re: 自己做了一个根文件系统,仍然不能正常引导,why?
错误信息是什么?
根目录下创建个linuxrc文件,kernel启动参数加上init=/linuxrc,
尝试用挂载方法使用/etc目录。mount /mnt/etc /etc
建议nfs方式挂载文件系统。
在 2010年4月22日 上午9:00,Hayfeng Lee <omycle@gmail.com> 写道:
> 我用的是2.6.26版本linux,主机是Ubuntu 9.10 .
> 编译busybox 1.9.1版本
> 1、更改busybox1.9.1的Makefile
> ARCH ?=arm
> CROSS_COMPILE?= 自己的交叉编译环境的位置我的是:
> 2、make menuconfig
>
> Busybox Setting----->
> build option-->
> [ ] Build BusyBox as a static binary (no shared libs)
> [*] Build shared libbusybox
> [*] Produce a binary for each applet, linked against libbusybox
> [*] Produce additional busybox binary linked against libbusybox
> [ ] Build with Large File Support (for accessing files > 2 GB)
>
> installation option-->
> [*] Don't use /usr
> Applets links (as soft-links) --->
> (./_install) BusyBox installation prefix
>
> Busybox Library Tuning --->
>
> MD5: Trade Bytes for Speed
> [*] Faster /proc scanning code (+100 bytes)
> [*] Support for /etc/networks
>
> [*] Support for /etc/networks
> [*] Additional editing keys
> [*] vi-style line editing commands
> [*] History saving
> [*] Tab completion
> [*] Username completion
> [*] Fancy shell prompts
>
> Linux Module Utilities --->
> [*] Support version 2.6.x Linux kernels
>
> [*] insmod
> [*] Enable load map (-m) option
> [*] Symbols in load map
> [*] rmmod
> [*] lsmod
> [*] lsmod pretty output for 2.6.x Linux kernels
> [*] modprobe
> [ ] Multiple options parsing
> [ ] Fancy alias parsing
> --- Options common to multiple modutils
> [ ] Support tainted module checking with new kernels
> [ ] Support version 2.2.x to 2.4.x Linux kernels
>
> [*] Support version 2.6.x Linux kernels
>
> 其他的用默认值
>
> 3、make install 开始安装
> 在busybox的根目录下生成_install文件夹,里面的东西有3项:bin sbin linuxrc
>
> 4、修改安装Busybox后的busybox文件属性,具体原因,随后再续。
> chmod 4755 ./_install/bin/busybox
> 5、在自己的home目录中,建立rootfs目录
> 将_install的内容拷贝到rootfs目录中
>
> 6、在rootfs目录下,建立空目录:
>
> dev home proc tmp var
> boot etc lib mnt root sys usr
> 7、此时 rootfs目录下有如下内容:
> bin dev home linuxrc proc sbin tmp var
> boot etc lib mnt root sys usr
> 8、
> 以root身份建立节点文件/dev/console, /dev/null
> mknod -m 600 dev/console c 5 1
> mknod -m 666 dev/null c 1 3
>
> 9、进入etc目录,建立profile文件,内容如下:
> #!/bin/sh
> #/etc/profile:system-wide .profile file for the Bourne shells
>
> echo
> echo -n "Processing /etc/profile......"
>
> # Set search library path
> export LD_LIBRARY_PATH=/lib:/usr/lib
>
> # set user path
> export PATH=/bin:/sbin:/usr/bin:/usr/sbin
>
> #Set PS1
> USER = "`id -un`"
> LOGNAME=$USER
> PS1='[\u@\h\W]\$'
> PATH=$PATH
>
> echo "Done!"
> 10、
> 在etc目录下建立init.d目录,然后在init.d目录下建立rcS文件
> init.d/rcS内容:
> #!/bin/sh
>
> # set hostname, needed host file in /etc directory
> #./etc/host
> hostname `cat /etc/host`
>
> # mount all filesystem defined in "fstab"
> echo "#mount all......."
> /bin/mount -a
>
> #+/bin/chmod 0666 /dev/null
>
> echo "# starting mdev...."
> /bin/echo /sbin/mdev > /proc/sys/kernel/hotplug
> mdev -s
>
> /usr/etc/init
>
> echo "******************************************"
> echo " "
> echo " "
> echo " "
> echo "******************************************"
>
> 11、在etc目录下建立fstab文件
> proc /proc proc defaults 0 0
> none /tmp ramfs defaults 0 0
> none /var ramfs defaults 0 0
> mdev /dev ramfs defaults 0 0
> sysfs /sys sysfs defaults 0 0
> 12、在etc目录下建立inittab文件
> ::sysinit:/etc/init.d/rcS
> ::respawn:-/bin/sh
>
> tty2::askfirst:-/bin/sh
>
> ::ctrlaltdel:/bin/umount -a -r
>
> ::shutdown:/bin umount -a -r
> ::shutdown:/sbin/swapoff -a
> 13、在etc目录下建立空文件
> mdev.conf
> 14、
> 复制主机/etc/下面的文件passwd, group, shadow文件到/etc
> [root@centos etc]# cp /etc/group .
> [root@centos etc]# cp /etc/passwd .
> [root@centos etc]# cp /etc/shadow .
> 15、
> 因为是编译的时候使用的是动态链接。所以先看看~/busybox/_install/bin/busybox使用了哪些
> lib,然后从glibc复制相应的lib到~/fsroot/lib中。
> [root@centos bin]# /usr/local/arm/3.4.1/arm-linux-gnu-readelf -d busybox
> Dynamic section at offset 0xb8014 contains 22 entries:
> Tag Type Name/Value
> 0x00000001 (NEEDED) Shared library:[libcrypt.so.1]
> 0x00000001 (NEEDED) Shared library: [libm.so.6]
> 0x00000001 (NEEDED) Shared library: [libc.so.6]
> 0x0000000c (INIT) 0xc04c
> 0x0000000d (FINI) 0xa26f0
> 0x00000004 (HASH) 0x80e8
> 0x00000005 (STRTAB) 0xa384
> 0x00000006 (SYMTAB) 0x8b24
> ......
> ......
> ......
> 复制lib 文件到lib目录下:
> [root@centos lib]cp /usr/local/arm/3.4.1/arm-linux/lib/ld* .
> [root@centos lib]cp /usr/local/arm/3.4.1/arm-linux/lib/libc-2.3.2.so .
> [root@centos lib]cp /usr/local/arm/3.4.1/arm-linux/lib/libc.so.6 .
> [root@centos lib]cp /usr/local/arm/3.4.1/arm-linux/lib/libm * .
> [root@centos lib]cp /usr/local/arm/3.4.1/arm-linux/lib/libcrypt* .
> 16、进入busybox根目录下,进入usr目录下,建立etc目录
> 在该etc目录下建立init文件
> #!/bin/sh
> ifconfig eth0 192.168.1.111 up
> ifconfig lo 127.0.0.1
>
> 17、 mkcramfs fsroot fs_2.6.26_busybox.cramfs
> 18、利用之前编译好的zImage引导操作系统
>
> 回复邮件,或者到:
> http://www.tek-life.org/2010/04/22/%e5%88%b6%e4%bd%9cinitrd/
> 中跟贴讨论,谢谢各位!
>
>
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