Re: 自己做了一个根文件系统，仍然不能正常引导，why?
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在 2010年4月22日 上午10:40，Xiangfu Liu <xiangfu.z@gmail.com> 写道：
> Hi
>
> then I guess it's some problem about your FPU configure.
> kernel configure or CFLAGS.
>
>
> On 04/22/2010 10:32 AM, Hayfeng Lee wrote:
>>
>> It doesn't work properly.
>> Now I just have a thread.
>>
>> 在 2010年4月22日 上午10:20，Xiangfu Liu<xiangfu.z@gmail.com> 写道：
>>>
>>> Hi
>>>
>>> if the SysRq or CTRL-ALT-DEL works after kernel hangs??
>>>
>>>
>>> On 04/22/2010 09:00 AM, Hayfeng Lee wrote:
>>>>
>>>> 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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