1. Operating Systems Session 1

2. Contact details TA: Alexander(Sasha) Apartsin ◦ apartsin@gmail.com apartsin@gmail.com ◦ Office hours: E-mail Homepage: www.cs.tau.ac.il/~apartzinwww.cs.tau.ac.il/~apartzin Resources: ◦ Everything at: msdn.microsoft.commsdn.microsoft.com ◦ Everything else at: www.google.comwww.google.comAdministration

3. Assignments All homework assignments must be performed individually. Usually 2 weeks per assignment Mostly Windows but few are Linux You have to submit all assignments to be able to approach the exam Late submission fine: ◦ A point off the final grade Administration

4. Submission guidelines Submission by e-mail See guidelines on the course’s Web page

5. Classes Each class will consist of 2 parts: Part I: Review of general OS concept and its Windows/Unix implementation Part II: “On-projector” development/coding of a Windows application which makes use of the presented concept Administration

6. Windows Development Setup Home ◦ A reasonable PC with XP/Vista ◦ Free Download from MS site:  Visual C++ 2010 Express Edition Visual C++ 2010 Express Edition Visual Studio 2003 @ Lab Administration

7. Windows Executables EXE :Portable Executable File Format What Windows does when you click on executable file?  Read and parse PE file header  Allocate resources (e.g. memory)  Locate and load libraries (DLL)  Map EXE segments (data, code) to the memory  Setup an environment (e.g. security)  Locate address of start function (main)  Call “main” function Windows Essentials

8. Command Shell Processor CMD.com Use special window: console window ◦ Makes system calls to read input from console(e.g. “dir” string) ◦ Makes system calls to fetch list of the files in current directory ◦ Makes system calls to print out results In-class examples and assignments will be windows console applications Windows Essentials

9. Windows Objects & Handles Windows object ◦ Window ◦ Process ◦ Device Handles ◦ Program that uses an object has a handle to it ◦ Multiple handles to the same objects ◦ Permissions can be associated with handle ◦ Reference counting: OS free object’s resources if there are no more handles to it Windows Essentials

10. Let’s do some programming Windows Development

11. Win32 files CreateFile ReadFile WriteFile CloseHandle