PPT-Ensuring Operating System Kernel Integrity with

Osck Owen Hofmann Alan Dunn Sangman Kim Indrajit Roy Emmett Witchel UT Austin HP Labs Rootkits are dangerous Adversary exploits insecure system Leave backdoor to facilitate longterm access. Debugging as Engineering. Much of your time in this course will be spent debugging. In industry, 50% of software dev is debugging. Even more for kernel development. How do you reduce time spent debugging?. Building and Porting embedded operating systems. The Booting Process. Power On. BIOS. GRUB. Kernel. Get . Bootloader. Get Kernel. Power On. X-Loader. U-Boot. Kernel. Get . Bootloader. Get Kernel. PC. Section 2. Shells and System Calls. OSDI 2010. 10/7/10. 2. Finding a Needle in a Haystack: Facebook’s Photo Storage. OSDI 2010. 10/7/10. 3. Results: storage costs reduced 28%; 4x greater. . read throughput. Windows and Some Differences from Linux. Brian Railing. 1. st. Year PhD Student. Previously. of. Windows Server Performance Team. 2. Copyright Notice. © 2000-2005 David A. Solomon and Mark Russinovich. 0.2 0.4 0.6 0.8 1.0 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 kernel(b) kernel(c) kernel(d) (a)blurredimage(b)no-blurredimage0.900.981.001.021.10 (5.35,3.37)(4.80,3.19)(4.71,3.22)(4.93,3.23)(5.03,3.22 Vecchiola. Postdoctoral Research Fellow. csve@unimelb.edu.au. Cloud Computing and Distributed Systems (CLOUDS) Lab . Dept. of Computer Science and Software Engineering. The University of Melbourne. Operating System Architecture. The Structure of the Operating System. Noah Mendelsohn. Tufts University. Email: . noah@cs.tufts.edu. Web: . http://www.cs.tufts.edu/~noah. Based on a presentation by Professor Alva Couch. COMP 111: Operating Systems (Fall 2013). Samuel T. King, George W. Dunlap,Peter M.Chen. . Presented By,. Rajesh . 1. References. [1] . Virtual . Machines: Supporting Changing Technology and New Applications, ECE Dept. Georgia Tech., November 14, . David Ferry, Chris Gill. Department of Computer Science and Engineering. Washington University, St. Louis MO. davidferry@wustl.edu. 1. Traditional View of Process Execution. However, the kernel is not a traditional process!. Ph. D. Course Work : PHYS 601. Statistics and Computer Applications. Presented By:. Sanjay . Godara. Dept. of Physics & Astrophysics. University of Delhi. WHAT . IS AN OPERATING SYSTEM?. S. oftware . David Ferry, Chris Gill. Department of Computer Science and Engineering. Washington University, St. Louis MO. davidferry@wustl.edu. 1. Traditional View of Process Execution. However, the kernel is not a traditional process!. CSE . 422S . - . Operating . Systems Organization. Washington University in St. Louis. St. Louis, MO 63143. 1. Things Happen: Kernel Oops vs Panic. A kernel . panic. is unrecoverable and results in an instant halt. Process concept. A process is an OS abstraction for executing a program with limited privileges. Dual-mode operation: user vs. kernel. Kernel-mode: execute with complete privileges. User-mode: execute with fewer privileges. By Dawson R. . Engler. , M. . Frans. . Kaashoek. ,. James O’Toole Jr.. Presented by Seth Goldstein. EECS 582 – W16. 1. Outline. Traditional Operating System. Exokernel. Implmentation. Kernel Comparisons.