2.19.2.busybox的移植实战

/**************************一. busybox制做成功*********************************************/
实验目的：ls /root/rootfs/oceanstar_rootfs/my_busybox/ （能够看到4个文件夹表示制做busybox成功，这个实验已经作过了）

(1). windows电脑下的F:\winshare\rootfs\busybox-1.24.1.tar.bz2

(2). 将busybox复制到ubuntu中并解压：

* cd /root/rootfs/oceanstar_rootfs/
* cp /mnt/hgfs/Winshare/rootfs/busybox-1.24.1.tar.bz2 /root/rootfs/oceanstar_rootfs/
* ls
* tar -jxvf busybox-1.24.1.tar.bz2

(3) 改makefile里的arch和cross_com

* cd /root/rootfs/oceanstar_rootfs/busybox-1.24.1
* vi Makefile：添加

             ARCH = arm
             CROSS_COMPILE = /usr/local/arm/arm-2009q3/bin//arm-none-linux-gnueabi-

(4). make menuconfig进行配置

* Busybox Settings--->


            Build Options--->
                [*]Build BusyBox as a static binary(no shared libs)
            Busybox Library Tuning--->
                [*]vi-style line editing commands
                [*]Fancy shell prompts

* Linux Module Utilities--->


    [ ]Simplified modutils
       [*]insmod
       [*]rmmod
       [*]lsmod
       [*]modprobe
       [*]depmod


* Linux System Utilities--->[*]mdev


       [*]Support /etc/mdev.conf
       [*]Support subdirs/symlinks
       [*]Support regular expressions substitutions when renaming dev
       [*]Support command execution at device addition/removal
       [*]Support loading of firmwares


* Coreutils  --->


     [ ] sync

(5). make -j2(Final link with:: m)
ls(出现一个黄色的busybox就表示表示完成了)

(6). 安装busybox

* make menuconfig


            Busybox Settings  --->Installation Options ("make install" behavior)  --->(./_install) BusyBox installation prefix，而后

复制 /root/rootfs/oceanstar_rootfs/my_busybox

* make install

实验目的：ls /root/rootfs/oceanstar_rootfs/my_busybox/ （能够看到4个文件夹表示制做busybox成功）

/**********开发板设置bootargs挂载添加了busybox移植的rootfs（已经解决）**************************************/
(1). SecurtCRT链接运行linux系统的开发板

* 打断3s启动进入uboot:
* 设置bootargs：setenv bootargs root=/dev/nfs nfsroot=192.168.1.141:/root/rootfs/oceanstar_rootfs/my_busybox ip=192.168.1.10:192.168.1.141:192.168.1.1:255.255.255.0::eth0:off  init=/linuxrc console=ttySAC2,115200   
* save

(2). zImage下载

* 前提条件：tftp搭建好，插好网线
* ls /tftpboot/      （看有没有zImage，若是没有，参考：zImage：2.15.3.内核配置和编译体验（1.24实验手册））
* ping 192.168.1.141
* tftp 30008000 zImage
* 结果不断重启， VFS: Cannot open root device "nfs" or unknown-block(0,255)，实验现象与老师的不一样，老师的是VFS:Mounted root (nfs filesystem) on device 0：12

总结：nfs挂载失败，
分析：这堂课有两个实验：制做busybox和下载添加了busybox的rootfs，这两个实验链接起来的地方是开发板uboot中设置bootargs:/root/rootfs/oceanstar_rootfs/my_busybox。

2018.3.14更新：开发板设置bootargs挂载添加了busybox移植的rootfs失败缘由是内核不支持nfs方式启动，可参考rootfs：2.18.4.nfs方式启动自制简易文件夹形式的rootfs.zhu：配置内核支持nfs方式启动

解决方法：set bootcmd 'tftp 30008000 zImage; bootm 30008000'（必定要设置）

/***************************跟新版本**********************************************************/

(1). windows电脑下的F:\winshare\rootfs\busybox-1.24.1.tar.bz2

(2). 将busybox复制到ubuntu中并解压：

* cd /root/porting_x210/rootfs/aston_rootfs
* cp /mnt/hgfs/Winshare/rootfs/busybox-1.24.1.tar.bz2 ./
* ls
* tar -jxvf busybox-1.24.1.tar.bz2

(3) 改makefile里的arch和cross_com
* cd busybox-1.24.1
* make distclean
* vi Makefile：添加

ARCH = arm
             CROSS_COMPILE = /usr/local/arm/arm-2009q3/bin//arm-none-linux-gnueabi-

(4). make menuconfig进行配置
* Busybox Settings--->

Build Options--->
                [*]Build BusyBox as a static binary(no shared libs)
            Busybox Library Tuning--->
                [*]vi-style line editing commands
                [*]Fancy shell prompts



* Coreutils  --->     


              [ ] sync  

* Linux Module Utilities--->


    [ ]Simplified modutils
       [*]insmod
       [*]rmmod
       [*]lsmod
        [* ]     Pretty output (NEW)
       [*]modprobe
         [* ]     Blacklist support (NEW)
       [*]depmod

* Linux System Utilities--->[*]mdev


       [*]Support /etc/mdev.conf
       [*]Support subdirs/symlinks
       [*]Support regular expressions substitutions when renaming dev
       [*]Support command execution at device addition/removal
       [*]Support loading of firmwares



* Busybox Settings  --->Installation Options ("make install" behavior)  --->(./_install) BusyBox installation prefix，而后复制 /root/porting_x210/rootfs/rootfs

(5). make -j2(Final link with:: m)
ls(出现一个黄色的busybox就表示表示完成了)

(6). 安装busybox

* make install

ls /root/porting_x210/rootfs/rootfs（能够看到4个文件夹表示制做busybox成功）/**********开发板设置bootargs挂载添加了busybox移植的rootfs**************************************/(1). SecurtCRT链接运行linux系统的开发板
* 打断3s启动进入uboot:
* 设置bootargs：setenv bootargs root=/dev/nfs nfsroot=192.168.1.141:/root/porting_x210/rootfs/rootfs ip=192.168.1.10:192.168.1.141:192.168.1.1:255.255.255.0::eth0:off init=/linuxrc console=ttySAC2,115200
* set bootcmd 'tftp 30008000 zImage; bootm 30008000'（必定要设置）
* save
* reset

结果：
[ 9.423975] VFS: Mounted root (nfs filesystem) on device 0:12.
[ 9.428489] Freeing init memory: 172K
can't run '/etc/init.d/rcS': No such file or directory
can't open /dev/tty2: No such file or directory
can't open /dev/tty3: No such file or directory
can't open /dev/tty4: No such file or directory
/#

获得了命令行，挂载成功，/linuxrc(就是busybus)执行：可是找不到rcS等文件