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5、

 Structure needs cleaning

重新挂载，

还不行的话重新

dd if=/dev/zero of=rootfs.ext3 bs=1M count=32
mkfs.ext3 rootfs.ext3

4、

-/bin/sh: : not found

把依赖的两个动态库都拷贝进去(弄完应看起来ok了)

cp 直接把库拷贝进去

cp -d 拷贝的只是符号链接

[10145657@zte.intra@LIN-2F8AC9DC590 01_chrdevbase]$ arm-linux-gnueabihf-readelf -d a.out 

Dynamic section at offset 0x704 contains 24 entries:
  Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]
 0x0000000c (INIT)                       0x10378
 0x0000000d (FINI)                       0x10660
 0x00000019 (INIT_ARRAY)                 0x206f8
 0x0000001b (INIT_ARRAYSZ)               4 (bytes)
 0x0000001a (FINI_ARRAY)                 0x206fc

　　

[ 01_chrdevbase]$ arm-linux-gnueabihf-readelf -d /mymnt/lib/libc.so.6 

Dynamic section at offset 0xdaf10 contains 26 entries:
  Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [ld-linux-armhf.so.3]
 0x0000000e (SONAME)                     Library soname: [libc.so.6]
 0x0000000c (INIT)                       0x16205
 0x0000001a (FINI_ARRAY)                 0xe96ac
 0x0000001c (FINI_ARRAYSZ)               4 (bytes)
 0x00000004 (HASH)                       0xd5c00
 0x6ffffef5 (GNU_HASH)                   0x1b8
 0x00000005 (STRTAB)                     0xc5e8
 0x00000006 (SYMTAB)                     0x3be8
 0x0000000a (STRSZ)                      22969 (bytes)


[01_chrdevbase]$ arm-linux-gnueabihf-readelf -d /mymnt/lib/ld-linux-armhf.so.3 

Dynamic section at offset 0x17f44 contains 19 entries:
  Tag        Type                         Name/Value
 0x0000000e (SONAME)                     Library soname: [ld-linux-armhf.so.3]
 0x00000004 (HASH)                       0x138
 0x6ffffef5 (GNU_HASH)                   0x1f8
 0x00000005 (STRTAB)                     0x4a4
 0x00000006 (SYMTAB)                     0x2d4
 0x0000000a (STRSZ)                      419 (bytes)
 0x0000000b (SYMENT)                     16 (bytes)
 0x00000003 (PLTGOT)                     0x28000

　　

 

3

busybox文系主要看这个

https://www.zhaixue.cc/qemu/qemu-build_busybox_rootfs.html

 

2、

qemu vexpress 主要看这个

https://www.jianshu.com/p/94833e841742

 

 

编busybox
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-  -j32 install



mkdir mnt proc root sys tmp var  #不加dev下面没东西

dd if=/dev/zero of=rootfs.ext3 bs=1M count=32
mkfs.ext3 rootfs.ext3

sudo mount -t ext3 rootfs.ext3 /mymnt -o loop
sudo umount /mymnt

# sudo mount -t ext3 rootfs.ext3 /mymnt -o loop
# sudo cp -rf rootfs/* /mymnt/
# sudo umount /mymnt

du -h --max-depth=0

 

 

1、

[XXX tools]$ sudo umount /mymnt
umount: /mymnt: target is busy.

[ tools]$ fuser -mv /mymnt/
                     用户     进程号 权限   命令
/mymnt:              root     kernel mount /mymnt
                     10145657@zte.intra  15025 ..c.. bash
[ tools]$ fuser -kv /mymnt/
                     用户     进程号 权限   命令
/mymnt:              root     kernel mount /mymnt
                     10145657@zte.intra  15025 ..c.. bash
[ tools]$ sudo umount /mymnt
[ tools]$ sudo mount -t ext3 rootfs.ext3 /mymnt -o loop
[ tools]$ 

 

 

6、第一个test

[root@vexpress my]# cat /proc/devices
Character devices:
  1 mem
  2 pty
  3 ttyp
  4 /dev/vc/0
  4 tty
  5 /dev/tty
  5 /dev/console
  5 /dev/ptmx
  7 vcs
 10 misc
 13 input
 29 fb
 90 mtd
116 alsa
128 ptm
136 pts
180 usb
189 usb_device
200 chrdevbase
204 ttyAMA
251 rpmb
252 usbmon
253 rtc
254 gpiochip

Block devices:
  8 sd
 31 mtdblock
 65 sd
 66 sd
 67 sd

[root@vexpress my]# mknod /dev/chrdevbase c 200 0
[root@vexpress my]# ls /dev/chr*
/dev/chrdevbase
[root@vexpress my]# ./a.out /dev/chrdevbase 1
kernel senddata ok!
read data:kernel data!