Re: 自己做了一个根文件系统，仍然不能正常引导，why?
我是在QEMU下，没有用串口
弱弱问一下，在QEMU下，怎么吧错误信息复制出来哩？
在 2010年4月22日 下午5:13，dou,peiqi <doupeiqi@gmail.com> 写道：
> 图看不清
> 把文字信息贴出来。
>
> 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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>>
>
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