os

1. Setup the i868-elf Cross Compiler

   • Follow the GCC Cross-Compiler guide
   • Should have i686-elf-gcc, i686-elf-as, etc. after

2. Install dependencies (follow OSDev guide, but here's the list I remember)

   • xoriso
   • grub
   • qemu

3. To setup the project you can:

   • Build kernel binary and bootable ISO:

   make # all

   • Run OS (with QEMU):

   make run # builds OS as well

   • Clean/delete object files, images, and binaries:

   make clean

   • Install libc/kernel headers (by default in sysroot/), gets run during builds

   make install

Notes

For debugging purposes, make run automatically attaches the QEMU monitor to stdio. This allows you to control the emulator (pause/resume VM, inspect registers, etc.). Check out the docs at: https://qemu-project.gitlab.io/qemu/system/monitor.html.

To debug, you can run make debug to attach a debugger and a QEMU monitor to stdio, which allows you to control the emulator (pause/resume VM, inspect registers, etc.). You run gdb and type:

(gdb) file myos.bin
(gdb) target remote localhost:1234
(gdb) continue