rustnix

another useless toy Unix clone

Features

• Interrupts
• Memory allocation
• ATA disk driver
• Basic inode-based filesystem
• Clock module
• Basic async/await support
• Syscalls
• Processes
• ELF Binaries
• Basic Userspace
• Basic IPC

Short-term todo

• fully implement /proc hierarchy

Thanks

Code

• for the initial stages of this project, I followed https://os.phil-opp.com/
• the ATA driver and process creation code was taken mainly from https://github.com/vinc/moros
• I have read some of the code of moros and RedoxOS for inspiration and implementation details
• the OSDev Wiki has also been helpful

Libraries used

• acpi
• aml
• bit_field
• bootloader
• chrono
• hashbrown
• lazy_static
• linked_list_allocator
• log
• pc-keyboard
• pic8259
• spin
• typenum
• uart_16550
• volatile (several versions behind)
• x86_64

Syscalls

Number	Name	Arg1	Arg2	Arg3	Arg4	Return
1	read	fd	buf (ptr)	buf_len		nread
2	write	fd	buf (ptr)	buf_len		nwritten
3	open	path (ptr)	path_len	mode (bitfield)		fd
4	close	fd				0 or -1 (err)
5	flush	fd				0 or -1 (err)
7	sleep	nanoseconds				0
8	wait (uses TSC)	nanoseconds				0
9	getpid
10	exec	path_addr	path_len	args_ptr	args_len
13	stop	kind (0=shutdown, 1=reboot)
18	alloc	size	align			ptr
19	free	ptr	size	align
21	geterrno					errno
22	poll	fd	event (1=read, 2=write)			ready
23	boottime					boot_time (nanos)
24	gettime					time (seconds)