Assembly
x86 and x86-64 machine code, reading what the compiler actually emitted, and writing the parts it can't emit for you.
- •12 min read•elfreverse-engineering
Building a Custom ELF Loader from Scratch, in C
You type ./program and the kernel loads it. Here's how that works: we build a userspace ELF loader in ~300 lines of C that maps PT_LOAD segments, builds a stack by hand, and jumps to the entry point.
- •4 min read•systems-programmingassembly
Building My First Multiboot Toy Kernel (x86, C + Assembly)
How I built a 32-bit freestanding toy kernel that boots through GRUB, enters C cleanly, and now handles CPU exceptions through GDT+IDT setup.