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Kernel development

0x00 Introduction

  • Basics
  • Commands
    • assemble:
      > nasm -f bin boot.asm -o boot.bin
      
    • view assemled instructions:
      > ndisasm boot.bin
      
    • execute binary
      > qemu-system-x86_64 -hda ./boot.bin
      
    • write to drive: choose the drive properly!!! dd is a powerful command
      > sudo dd if=./boot.bin of=/dev/sdc
      

0x01 Bootloader

  • install qemu-system-x86_64: emulator

  • simple bootloader

    • writing a character
    • writing a message
  • improve bootloader

    • setup segment registers: DS, ES
    • setup stack and stack pointer
  • boot on actual hardware

    • handle bios parameter block - working on pc!
  • custom interrupts

    • write custom interrupts
  • Makefile: automate the build process

    • create make file
    • handle assemble
    • write message after boot sector
    • fill zeros to create another sector in the virtual hard-disk (boot.bin)
  • Reading form the hard-disk

    • using Int 13/AH=02h