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Mini Operating System From Zero

Debian Dev Environment Setup

sudo apt update
sudo apt install build-essential nasm gcc gdb gdbserver ccache qemu qemu-system-x86

Debug

Run make debug and then you can use any gdb command.

break

  • b main: puts a breakpoint at the symbol main
  • b f:N: puts a breakpoint at the line N of file f

continue

  • c: continues running the program until the next breakpoint or error

info

  • info break: list breakpoints
  • info registers eax: show the value of specific register

where

  • where: Show call stack
  • where full: Show call stack, also print the local variables in each frame

del

  • del N: remove break point N

step

  • s: runs the next line of the program

next

  • n: Like s, but it does not step into functions

layout asm

  • layout asm: show the assembly and command windows.

stepi

  • si: next instruction

nexti

  • ni: Like si, but it does not step into routines

print

  • p var: print the current value of the variable var.

finish

  • finish: Runs until the current function is finished

list

  • list: print more lines

quit

  • q: quits gdb

VNC

You can access the remote desktop with VNC viewer connecting to "<your-linux-virtual-machine-ip-address>:5900".

Tutorial

Course

Book

Windows

Source Code

Windows

OSX

Emulator

Reference