This module shows you how to install a software development framework for OS/161. Lecture: 30 minutes – Slides 1-20. Demo: 20 minutes 1. Project 2 Specification.docx Preview the documentView in a new window 2. How to build tool chain: The MIPS toolchain for os161.txtPreview the documentView in a new window 3. How to build and run sys161.htmlView in a new window 4. gdb.htm View in a new window and cvs.htmView in a new window 5. Configuration file: sys161.confView in a new window Below, you can find five source code packages: 6. os161-1.10.tar.gzView in a new window 7. cs161-binutils-1.4.tarView in a new window 8. Download cs161-gcc-1.4.tar from: https://dl.dropboxusercontent.com/u/24238235/cs161-gcc-1.4.tar 9. Download cs161-gdb-1.4.tar from: https://dl.dropboxusercontent.com/u/24238235/cs161-gdb-1.4.tar 10. sys161-1.12.tar.gzView in a new window

1. 1
COMP 3500
Introduction to Operating Systems
Project 2 – An Introduction to OS/161
Details
Dr. Xiao Qin
Auburn University
http://www.eng.auburn.edu/~xqin
xqin@auburn.edu

2. 2
Did you carry out project 1 ?

3. Exercise 1 (Plickers) 
What is the yum command ?
A. A configuration software tool
B. A troubleshooting software tool
C. An automated uninstallation program
D. An automated update program

4. Exercise 2 (Plickers) 
In the gdb debugger, typing character ‘n’ means:
A. ‘next’ - Step into the next function.
B. ‘new’ - Set a new breakpoint
C. ‘next’ - Continue to the next source line
D. ‘new’ – Create a new local variable

5. Exercise 3 (Plickers) 
What does the following command do?
#cvs -d /cs161_cvsroot init
A. Create a CVS root
B. Create a CVS repository
C. Delete a CVS root
D. Delete an initial CVS root

6. Exercise 4 (Plickers) 
What does the following command do?
%tar vfcz <group_ID>_project1.tgz .
A. Create a single compressed file for project 1
B. Uncompress files for project 1
C. Validate files of project 1
D. Install files of project 1

7. 7

8. 8

9. Setting up PATH
• If you use bash, add the following line near
the end of the ~/.bashrc file.
export PATH=~/cs161/bin:$PATH
• If you use tcsh, add the following line near the
end of the ~/.cshrc file:
setenv PATH ~/cs161/bin:$PATH
$export PATH=~/cs161/bin:$PATH

10. Setting up CVSROOT
• If you use bash, add the following line near
the end of the ~/.bashrc file.
export CVSROOT=~/cs161/cvsroot
• If you use tcsh, add the following line near the
end of the ~/.cshrc file:
setenv CVSROOT ~/cs161/cvsroot
%export CVSROOT=~/cs161/cvsroot

11. Building blocks for OS/161
Before building OS/161 from os161-1.10.tar.gz, you must
first build the following items:
1. tool chain: cs161-binutils-1.4.tar
2. cross compiler: cs161-gcc-1.4.tar
3. special gdb: cs161-gdb-1.4.tar
4. sys161 MIPS emulator: sys161-1.12.tar
The above sequential order is the required order for building!

12. 12
Linux: CentOS
Tool chain: cs161-binutils-1.4.tar
cross compiler: cs161-gcc-1.4.tar special gdb: cs161-gdb-1.4.tar
sys161 MIPS emulator: sys161-1.12.tar
OS/161: os161-1.10.tar.gz
Build a Software Framework for OS/161

13. 13
/cs161
Source Code Tree
/src /root
/kern /include /sys161 (bin)
/conf /compile
ASST0 (file) /ASST0 (dir)
makefile

14. Build the Tool Chain
%cd ~/cs161
%tar vfxz cs161-binutils-1.4.tar
%cd cs161-binutils-1.4
%./toolbuild.sh

15. Build the Cross Compiler
%cd ~/cs161
%tar vfxz cs161-gcc-1.4.tar
%cd cs161-gcc-1.4
%./toolbuild.sh

16. Build the Special gdb
%cd ~/cs161
%tar vfxz cs161-gdb-1.4.tar
%cd cs161-gdb-1.4
%./toolbuild.sh

17. Build the sys161 Emulator
%cd ~/cs161
%tar vfxz sys161-1.14.tar.gz
%cd sys161-1.14
%./configure mipseb
%make
%make install

18. A Tool for Code Reading
You must learn how to use “grep” to improve your
source code reading skill.
%grep –r “stack” .
%grep “stack” *.h

19. Exercise: Code Reading: An Example
2. What bus/busses does OS/161 support?
You must search the source code using the most
appropriate keywords
%cd ~/cs161/src/kern/arch/mips/mips
%grep ‘bus’ *.c

20. Building a Kernel
You must first configure your source code tree
%cd ~/cs161/src
%./configure

21. Configure a Kernel for Project 2
You must first configure your source code tree
% cd ~/cs161/src/kern/conf
% ./config ASST0

22. Building the Kernel for Project 2
The path of your makefile for project 2 is important
%cd ~/cs161/src/kern/compile/ASST0
%make depend
%make
%make install

23. Building the User level utilities
• Remember the path of the makefile
%cd ~/cs161/src
%make
• Now you are ready to run your kernel …

24. Running your newly built kernel
• Remember where is your new kernel located
%cd ~/cs161/root
%./sys161 kernel
• At the prompt, type
p /sbin/poweroff <return>

25. 25