Making a basic 32 bit OS targetting i386 (at least for now)
The goal of this project is to learn about OS design and implementation, not to build something useful, fast, or reliable. I don't really want to spend time making an efficient libc because that's not an OS concept, as long as it works, it works. If I have time later on, of course, I would love to do all that.
This project uses meson.
You will also need an i386 cross compiler toolchain (binutils and gcc), nasm, grub, and python.
cd kernel
meson setup --cross-file ../i386-elf.txt build-i386
meson compile -C build-i386
The kernel depends on a custom libc implementation which needs to be installed into sysroot before building. It is likely that the first time compiling will generate an error due to libc not being in the sysroot directory. If that happens, build and install libc manually. Builds after that should be fine. This is just until I figure out how to get meson to install the subproject before building.
I've only tested the kernel with qemu, but I'm sure it would work with another emulator provided you go through installation and whatever configuration they need. If you built the cross compiler toolchain you should have an i386 compatible qemu. Running qemu.sh should build the kernel, generate the iso, and open the emulator with the iso.
./qemu.sh debug # run qemu in debug mode
i386-elf-gdb kernel/build-i386/isodir/boot/pax_os.elfthe .gdbinit config should put you into a remote target on startup.