2023
CAFE BABE, if you know, you know. JVM enthusiast.
Each program has a magic word in its machine code that defines its identity. For Java class files, it's CAFE BABE, and the story behind it is great.
How your program's functions are handled in memory?
Because I always forget how the kernel handles a program's functions in the call stack, I wrote it down. Function prologue, %rbp, %rsp, and calling conventions.
What the heck is locality of reference, and why will I waste brain cells bytes to know it?
Locality of Reference is a critical Computer Science topic that helps improve your software's performance, if you're aware of it.
How the heck a C program is compiled from human comprehensible language to 0's and 1's
You may have wondered how programming language lexemes are turned into a series of 0's and 1's, aka binary files. Let's discover that together, step by step.
Why the heck the _state variable in task_struct structure is 4 bytes
The Linux process state needs six flags, so why is it stored in an unsigned integer with 2^32 possible values? The answer is in READ_ONCE/WRITE_ONCE.
Why the heck gateways are invented in computer networks?
I've always wondered why the default gateway is needed in computer networks. I finally realized, so I wanted to share that with you guys :)