Android开发教程之Android linux基础知识总结.ppt

1、Android开发教程之Androidlinux基础知识总结,一、busybox的编译 二、ramdisk文件系统生成 三、u-boot加载内核和文件系统,首先是交叉编译设置，打开busybox根目录下的Makefile，进行修改 attach220792/attach 一般情况下，为了让busybox能够独立于其他的库文件而可以单独运行，需要将busybox编译成静态的。 #make menuconfig Busybox Settings - Build Options - Build BusyBox as a static binary (no shared libs) /静态 Insta

2、llation Options - Dont use /usr /make install的时候不会安装到根目录，而是安装到./_install Linux System Utilities -,一、 Android开发教程之busybox的编译,mdev /相当于udev Support /etc/mdev.conf Support command execution at device addition/removal Shells - Choose your default shell (msh) /具有ash没有的功能，比如支持tab补齐，历史纪录等等的高级功能 而编译成静态的分为gl

3、ibc和uclibc，如果系统没有安装uclibc的话，那就会报下面的错 attach220793/attach 解决办法是打开 applets/applets.c 将其中的错误注释掉 attach220794/attach 其他的busybox选项根据需要进行选择！ #make #make install 这样就在./_install目录下生成了busybox attach220795/attach,Android开发教程,attach220796/attach 上图中首先创见了一个10M的文件系统映象 然后使用losetup命令将此镜像与块设备/dev/loop0进行挂接 如果出现ioct

4、l: LOOP_SET_FD:设备或资源忙，说明/dev/loop0设备还和一文件联系，可用losetup /dev/loop0查看地，并可用-d 删除 attach220797/attach 上图是用命令mke2fs来格式化此块设备/dev/loop0，其实就是格式化我们刚生成的那个文件系统镜像，ext2格式 attach220798/attach 上图是挂载文件系统镜像，可见经过刚才格式化之后的文件系统镜像里面只有lost+found这个文件夹,二、 Android开发教程之ramdisk文件系统生成,之后可以将步骤一中生成的_install目录下的所有文件拷贝进来即可， /et/init

5、.d/rcS文件如下修改 attach220799/attach 其他的系统配置文件可以根据需要进行更改 三、u-boot加载内核和文件系统 = tftp 800000 uImage; tftp a00000 rootfs.img; bootm 800000 a00000 Using FCC1 ETHERNET device TFTP from server 02; our IP address is 0 Filename uImage.,Android开发教程,Load address: 0 x800000 Loading: # # # # # #

6、 done Bytes transferred = 1880231 (1cb0a7 hex) Using FCC1 ETHERNET device TFTP from server 02; our IP address is 0 Filename rootfs.img. Load address: 0 xa00000,Android开发教程,Loading: # # # # # # # # # # done,Android开发教程,Bytes transferred = 3170368 (306040 hex) # Booting image at

7、00800000 . Image Name: Linux-2.6.11 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1880167 Bytes = 1.8 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum . OK Uncompressing Kernel Image . OK # cmdline at 0 x007FFF00 . 0 x007FFF14,Android开发教程,memstart = 0 x0000000

8、0 memsize = 0 x08000000 flashstart = 0 xFE000000 flashsize = 0 x01000000 flashoffset = 0 x00033000 sramstart = 0 x00000000 sramsize = 0 x00000000 immr_base = 0 xF0000000 bootflags = 0 x00000001 vco = 400 MHz,Android开发教程,sccfreq = 100 MHz brgfreq = 100 MHz intfreq = 400 MHz cpmfreq = 200 MHz busfreq

9、= 100 MHz ethaddr = 00:08:02:06:10:00 IP addr = 0 baudrate = 115200 bps # Loading RAMDisk Image at 00a00000 . Image Name: Image Type: PowerPC Linux RAMDisk Image (uncompressed) Data Size: 3170304 Bytes = 3 MB,Android开发教程,Load Address: 00000000 Entry Point: 00000000 Verifying Checksum . OK

10、 Loading Ramdisk to 07880000, end 07b86000 . OK Linux version 2.6.11 (rootEmbedded001) (gcc version 3.4.3) #1 Fri Sep 26 11:08:35 CST 2008 Motorola PQ2 ADS PowerPC port arch/ppc/syslib/m82xx_pci.c: The PCI bus is 33333333 Mhz. Waiting 1 second after deasserting RST. Built 1 zonelists Kernel command

11、line: console=ttyS0,115200,Android开发教程,PID hash table entries: 1024 (order: 10, 16384 bytes) Warning: real time clock seems stuck! Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) Memory: 122272k available (2660k kernel cod

12、e, 1524k data, 116k init, 0k highmem) Mount-cache hash table entries: 512 (order: 0, 4096 bytes) checking if image is initramfs.it isnt (bad gzip magic numbers); looks like an initrd Freeing initrd memory: 3096k freed NET: Registered protocol family 16 PCI: Probing PCI hardware,Android开发教程,dev = 0,

13、pin = 1 slot = 0, dev = 0, pin = 1 dev = a0, pin = 1 slot = 20, dev = a0, pin = 1 dev = b8, pin = 1 slot = 23, dev = b8, pin = 1 dev = b9, pin = 1 slot = 23, dev = b9, pin = 1 PCI: Cannot allocate resource region 0 of device 0000:00:00.0 PCI: Cannot allocate resource region 1 of device 0000:00:00.0,

14、Android开发教程,SCSI subsystem initialized Sangoma WANPIPE Router v1.1 (c) 1995-2000 Sangoma Technologies Inc. devfs: 2004-01-31 Richard Gooch (emailrgoochatnf.csiro.au/email) devfs: boot_options: 0 x1 Initializing Cryptographic API Serial: CPM driver $Revision: 0.01 $ ttyS0 at MMIO 0 xf0011a80 (irq = 4

15、) is a CPM UART ttyS1 at MMIO 0 xf0011a00 (irq = 40) is a CPM UART ttyS2 at MMIO 0 xf0011a60 (irq = 43) is a CPM UART io scheduler noop registered,Android开发教程,io scheduler anticipatory registered io scheduler deadline registered io scheduler cfq registered RAMDISK driver initialized: 16 RAM disks of

16、 8192K size 1024 blocksize loop: loaded (max 8 devices) nbd: registered device at major 43 Intel(R) PRO/1000 Network Driver - version -k2 Copyright (c) 1999-2004 Intel Corporation. e100: Intel(R) PRO/100 Network Driver, 3.3.6-k2-NAPI e100: Copyright(c) 1999-2004 Intel Corporation ipddp.c:v0.

17、01 8/28/97 Bradford W. Johnson ,Android开发教程,ipddp0: Appletalk-IP Encap. mode by Bradford W. Johnson i2c /dev entries driver eth0: FCC ENET Version 0.3, 00:08:02:86:10:00 eth1: FCC ENET Version 0.3, 00:08:02:46:10:00 NET: Registered protocol family 26 NET: Registered protocol family 2 IP: routing cac

18、he hash table of 1024 buckets, 8Kbytes TCP established hash table entries: 8192 (order: 4, 65536 bytes) TCP bind hash table entries: 8192 (order: 3, 32768 bytes) TCP: Hash tables configured (established 8192 bind 8192),Android开发教程,IPv4 over IPv4 tunneling driver GRE over IPv4 tunneling driver ip_con

19、ntrack version 2.1 (1024 buckets, 8192 max) - 248 bytes per conntrack ip_tables: (C) 2000-2002 Netfilter core team ipt_recent v0.3.1: Stephen Frost . ClusterIP Version 0.6 loaded successfully arp_tables: (C) 2002 David S. Miller IPVS: Registered protocols (TCP, UDP, AH, ESP) IPVS: Connection hash ta

20、ble configured (size=4096, memory=32Kbytes),Android开发教程,IPVS: ipvs loaded. IPVS: rr scheduler registered. IPVS: wrr scheduler registered. IPVS: lc scheduler registered. IPVS: wlc scheduler registered. IPVS: lblc scheduler registered. IPVS: lblcr scheduler registered. IPVS: dh scheduler registered. I

21、PVS: sh scheduler registered. IPVS: sed scheduler registered.,Android开发教程,IPVS: nq scheduler registered. Initializing IPsec netlink socket NET: Registered protocol family 1 NET: Registered protocol family 17 NET: Registered protocol family 15 Bridge firewalling registered Ebtables v2.0 registered NE

22、T: Registered protocol family 4 NET: Registered protocol family 5 NET: Registered protocol family 9 X.25 for Linux. Version 0.2 for Linux 2.1.15,Android开发教程,NET: Registered protocol family 8 NET: Registered protocol family 20 lec.c: Sep 26 2008 11:07:03 initialized mpoa: /proc/mpoa initialized mpc.c: Sep 26 2008 11:07:01 initialized NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team DECnet: Routing cache has