A fork of arjun024/mkernel for MSYS2 MinGW 64-bit

This is a minimalist kernel which prints "my first kernel" on the screen and then hangs.

• The kernel is multi-boot compliant and loads with GRUB.

Kernel 101 – Let’s write a Kernel

1. Install MSYS2 x86_64
2. Open MSYS2 MinGW 64-bit terminal
3. Install dependencies (nasm, gcc, binutils, qemu):

pacman -S mingw-w64-x86_64-nasm mingw-w64-x86_64-gcc mingw-w64-x86_64-binutils mingw-w64-x86_64-qemu

(Note: You may or may not have to install other missing dependencies. In addition to the ones listed above, I also have base-devel and mingw-w64-x86_64-toolchain installed.)

nasm -f elf32 kernel.asm -o kasm.o

gcc -m32 -c kernel.c -o kc.o

ld -m i386pe -T link.ld -o kernel kasm.o kc.o

objcopy -O elf32-i386 kernel kernel.elf

(Note: The commands ld and qemu-system-i386 slightly differ from those of the original mkernel. The standard MinGW/64 LD linker doesn't output ELF binaries. Because of this, the objcopy command is added to convert from PEI-I386 to ELF.)

qemu-system-i386 -kernel kernel.elf

GRUB requires your kernel executable to be of the pattern kernel-<version>.

So, rename the kernel:

mv kernel.elf kernel-701

Copy it to your boot partition (assuming you are superuser):

cp kernel-701 /boot/kernel-701

Configure your grub/grub2 similar to what is given in _grub_grub2_config folder.

Reboot.

Voila!

See mkeykernel repo