These exercises are designed to illusrate the principals that are covered in the course materials, for session three we have the following exercises:

• structs
• pointers
• syscall
• files

Note You will need to mark these binaries as executable before trying to run them, ex: chmod u+x structs

Each of these exercises are designed to accept user input from the command line - when the proper input is provided you will get a Success or Congratulatory message.

Remember you can provide non ascii input as follows:

./pointers `python -c 'print "\xDE\xAD\xBE\xEF"'`

This example will provide the value 0xDEADBEEF into argv[1]

Hint: For the files exercise, you may need to edit binary files, to do this you can use any standard hex editor, below are some reccomendations:

• 010Editor
• HxD
• xxd

It is up to you to determine the format and number of these arguments for each exercise by reverse engineering them - if you get stuck please feel free to reach out on the hackaday.io page, or reach out to me on twitter.