CS208 Introduction to Computer Systems
Wednesday, 14 February 2024

+ Two questions
+ What interesting stuff have you discovered?
    (on the zoo stuff, but also anything all term)

    jmpq   *0x402580(,%rax,8)   indirect jump

+ What's bugging and/or puzzling you?

    why are there a ton of trigger_alarm calls, even in the same phase?
        not very optimized compilation

    multi-file debugging in VS Code
        JO's response is a big shrug

    Explanations for the zoo
        Phase1: if the user input is identical to a hard-coded
        string ("..."), then the phase is unlocked; if not, alarms are triggered.
    
+ More fooling around with C and asm
- (but this time, you can run it and watch it work)
- how does data access work when it's on the stack
    instead of in registers?
- what's this "pushq rbx" at the beginnings
    of functions about?

+ Machine language
- What is it?
- What does it look like?
    objdump -d