Content about assembly

• Sep 3, 2026•12 min read•

  elfloader

  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.

• Feb 24, 2026•4 min read•

  osdevkernel

  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.