Experimental busy dad's learning activity.
Rough list of features
- ✅ interrupts (time, keyboard)
- ✅ paging
- ✅ heap memory
- ✅ higher half kernel
- ✅ userspace (ring 3) programs
- ✅ multiprocessing with simple scheduler
- ✅ syscalls with userspace libc in Rust and C
- ✅ VGA mode
- ✅ "fake file operations" (read files embedded in executable)
- ✅ use Rust instead of C
- ✅ run Doom
- enable userspace processes to communicate via an IPC
- network stack
- make running on RISC-V (ESP32-C3?) additionally to x86_64
Rough list of ecosystem
- ✅ Github CI action to build
- ✅ gdb debugging
- adopt Bazel instead of make
docker build buildenv_rust -t jos_buildenv
docker run --rm -it -v "${pwd}:/root/env" jos_buildenv
make build-x86_64
- (other shell)
qemu-system-x86_64 -no-reboot -cdrom dist/x86_64/kernel.iso
https://wiki.osdev.org/QEMU#Useful_QEMU_command-line_options
(couldn't get this working yet)
https://www.qemu.org/docs/master/system/replay.html
qemu-img create -f qcow2 empty.qcow2 1G
qemu-system-x86_64 -s -S -d int,cpu_reset,guest_errors -action panic=pause -no-reboot -monitor stdio -cdrom dist/x86_64/kernel.iso -icount shift=auto,rr=record,rrfile=record.bin,rrsnapshot=init -net none -drive file=empty.qcow2,if=none,id=rr
savevm TAG
(multiple times if needed)quit
qemu-system-x86_64 -s -S -d int,cpu_reset,guest_errors -action panic=pause -no-reboot -monitor stdio -cdrom dist/x86_64/kernel.iso -icount shift=auto,rr=replay,rrfile=record.bin,rrsnapshot=init -net none -drive file=empty.qcow2,if=none,id=rr
loadvm TAG
Bootstrapped by "Write Your Own 64-bit Operating System Kernel From Scratch" by https://github.com/davidcallanan/os-series