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rhel 5.2下配置skeye+uClinux
经过2天的尝试，今天终于把skyeye+uClinux配置成功了，特记下我配置的过程，希望对你有用！！
说下我的系统平台：我用的是在linux下的VMare+RHEL5.2(2.6.18-92.el5)
首先下载如下版本的文件（其他的版本没试过）：
skyeye: skyeye-1.2.5_REL.tar.gz
下载地址：http://download.gro.clinux.org/skyeye/skyeye-1.2.5_REL.tar.gz
arm-elf-tools: arm-elf-tools-20040427.sh
下载地址：http://www.lumit.org/download/tools/arm-elf-tools-20040427.sh
arm-linux-tools: arm-linux-tools-20070808.tar.gz
下载地址：http://ftp.snapgear.org/pub/snapgear/tools/arm-linux/arm-linux-tools-20070808.tar.gz
uClinux: uClinux-dist-20080808.tar.bz2
下载地址：http://mirror.lzu.edu.cn/software/embedded/uclinux.org/dist/uClinux-dist-20080808.tar.bz2
安装步骤：
1、安装arm-elf-tools交叉编译环境：
chmod a+x arm-elf-tools-20030314.sh
./arm-elf-tools-20030314.sh
[root@work ~]# which arm-elf-gcc
/usr/local/bin/arm-elf-gcc
说明 arm-elf-gcc 已经安装
如果提示错误：
tail: 。。。。“+43”。。。。。
gunzip: stdin: not in gzip format
解决方法如下：
这是由于脚本中的tail没写对，必须加一个 -n 参数
用vi打开 arm-elf-tools-20030314.sh
将第39行的代码：
tail +${SKIP} ${SCRIPT} | gunzip | tar xvf -
改成如下：
tail -n +${SKIP} ${SCRIPT} | gunzip | tar xvf -
2、安装arm-linux-tools交叉编译环境：
tar zxvf arm-linux-tools-20070808.tar.gz
就好在本目录下产生一个usr目录，比如我的就是/root/usr/这时要把它链接到/usr/local/下
ln -n /root/usr/local /usr/local/arm
编辑.bash_profile添加一行export PATH=$PATH:/usr/local/arm/bin
保存重启系统
3、安装skyeye：
tar zxvf skyeye-1.2.5_REL.tar.gz
进入解压后的skyeye目录，接下来执行：
make
make install
如果一切正常，运行
skyeye
会出现一下信息：
[root@work ~]# skyeye
**************************** WARNING **********************************
If you want to run ELF image, you should use -e option to indicate
your elf-format image filename. Or you only want to run binary image,
you need to set the filename of the image and its entry in skyeye.conf.
***********************************************************************
Your elf file is little endian.
Failed to open skyeye config file skyeye.conf in the same directory
error: No such file or directory
SkyEye 1.2.5
Bug report: skyeye-developer@lists.gro.clinux.org
Usage: skyeye [options] -e program [program args]
Default mode is STANDALONE mode
------------------------------------------------------------------
Options:
-e exec-file the (ELF executable format)kernel file name.
-l load_address,load_address_mask
Load ELF file to another address, not its entry.
-b specify the data type is big endian when non "-e" option.
-d in GDB Server mode (can be connected by GDB).
-c config-file the skyeye configure file name.
-h The SkyEye command options, and ARCHs and CPUs simulated.
------------------------------------------------------------------
----------- Architectures and CPUs simulated by SkyEye-------------
-------- ARM architectures ---------
at91
lpc
s3c4510b
s3c44b0x
s3c44b0
s3c3410x
ep7312
lh79520
ep9312
cs89712
sa1100
pxa_lubbock
pxa_mainstone
at91rm92
s3c2410x
s3c2440
sharp_lh7a400
ns9750
-------- BlackFin architectures ----
bf533
bf537
3、编译uClinux：
#tar jxvf uClinux-dist-20080808.tar.bz2
#cd uClinux-dist
#make menuconfig
选择
Vendor/Product: GDB/Skyeye
Kernel Version: linux-2.6.x
Libc Version: uClibc
保存退出
在 uclinux-dist 目录下建立仿真AT91的skyeye配置文件 skyeye.conf,内容如下：
cpu: arm7tdmi
mach: at91
mem_bank: map=M, type=RW, addr=0x00000000, size=0x00004000
mem_bank: map=M, type=RW, addr=0x01000000, size=0x00400000
mem_bank: map=M, type=R, addr=0x01400000, size=0x00400000, file=images/boot.rom
mem_bank: map=M, type=RW, addr=0x02000000, size=0x00400000
mem_bank: map=M, type=RW, addr=0x02400000, size=0x00008000
mem_bank: map=M, type=RW, addr=0x04000000, size=0x00400000
mem_bank: map=I, type=RW, addr=0xf0000000, size=0x10000000
lcd: state=on
然后执行：
make dep
make
4、在skyeye下运行uClinux
这个时候就可以用skyeye来调试运行kernel了，在uclinux-dist执行如下命令：
skyeye -e linux-2.6.x/linux
需要注意的是我已经在/usr/bin目录中建立了一个skyeye的符号连接，所以上面才不需要输入skyeye的完整路径。另外，由于skyeye.conf就在当前目录下，所以也就不用在skyeye命令中使用-c参数指定了
下面是uClinux跑起来的界面显示：
[root@work uClinux-dist]# skyeye -e linux-2.6.x/linux
Your elf file is little endian.
arch: arm
cpu info: armv3, arm7tdmi, 41007700, fff8ff00, 0
mach info: name at91, mach_init addr 0x805eb60
uart_mod:0, desc_in:, desc_out:, converter:
SKYEYE: use arm7100 mmu ops
Loaded ROM images/boot.rom
start addr is set to 0x01008000 by exec file.
Linux version 2.6.25-uc0 ([email=root@work]root@work[/email]) (gcc version 4.2.1) #1 Wed Oct 15 14:30:09 CST 2008
CPU: Atmel-AT91M40xxx [14000040] revision 0 (ARMvundefined/unknown), cr=00000000
Machine: Atmel AT91 EB01
Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4064
Kernel command line:
PID hash table entries: 64 (order: 6, 256 bytes)
console [ttyS0] enabled
Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)
Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
Memory: 16MB = 16MB total
Memory: 15284KB available (820K code, 74K data, 60K init)
Mount-cache hash table entries: 512
io scheduler noop registered (default)
Atmel USART driver version 0.99
ttyS0 at 0xfffd0000 (irq = 2) is a builtin Atmel APB USART
ttyS1 at 0xfffcc000 (irq = 3) is a builtin Atmel APB USART
brd: module loaded
uclinux[mtd]: RAM probe address=0x1400000 size=0xff000
Creating 1 MTD partitions on "ROM":
0x00000000-0x000ff000 : "ROMfs"
uclinux[mtd]: set ROMfs to be root filesystem
VFS: Mounted root (romfs filesystem) readonly.
Freeing init memory: 60K
Shell invoked to run file: /etc/rc
Command: hostname GDB-ARMulator
Command: /bin/expand /etc/ramfs.img /dev/ram0
Command: mount -t proc proc /proc
Command: mount -t ext2 /dev/ram0 /var
Command: mkdir /var/tmp
Command: mkdir /var/log
Command: mkdir /var/run
Command: mkdir /var/lock
Command: mkdir /var/empty
Command: cat /etc/motd
Welcome to
____ _ _
/ __| ||_|
_ _| | | | _ ____ _ _ _ _
| | | | | | || | _ \| | | |\ \/ /
| |_| | |__| || | | | | |_| |/ \
| ___\____|_||_|_| |_|\____|\_/\_/
| |
|_|
GDB/ARMulator support by <davidm@snapgear.com>
For further information check:
http://www.uclinux.org/
Execution Finished, Exiting
Sash command shell (version 1.1.1)
/>
注意:要在 skyeye.conf 所在目录下执行skyeye。
如果你是按网上的教程配置可能会有很多错误，比如：
arm-linux-ld: ERROR: /opt/project/arm-linux/arm-linux/bin/../lib/gcc/arm-linux/3.4.3/libgcc.a(_divsi3.oS) uses VFP instructions, whereas u-boot does not
File in wrong format: failed to merge target specific data of file /opt/project/arm-linux/arm-linux/bin/../lib/gcc/arm-linux/3.4.3/libgcc.a(_divsi3.oS)
arm-linux-ld: ERROR: /opt/project/arm-linux/arm-linux/bin/../lib/gcc/arm-linux/3.4.3/libgcc.a(_umodsi3.oS) uses VFP instructions, whereas u-boot does not
File in wrong format: failed to merge target specific data of file /opt/project/arm-linux/arm-linux/bin/../lib/gcc/arm-linux/3.4.3/libgcc.a(_umodsi3.oS)
arm-linux-ld: ERROR: /opt/project/arm-linux/arm-linux/bin/../lib/gcc/arm-linux/3.4.3/libgcc.a(_modsi3.oS) uses VFP instructions, whereas u-boot does not
File in wrong format: failed to merge target specific data of file /opt/project/arm-linux/arm-linux/bin/../lib/gcc/arm-linux/3.4.3/libgcc.a(_modsi3.oS)
make: *** Error 1
这时典型的浮点问题，你可能要降低你的编译工具版本，
或者修改arm-linux-gcc配置文件，或者在内核目录下找相应架构的配置文件，去除软浮点运算
或者选择本文提到的arm-linux-tools版本的工具，并选择linux 2.6.x内核，可顺利完成
