WINIX OS

Winix is a minimal, hobbyistic, educational and UNIX-style Operating System for the Waikato RISC Architecture Microprocessor (WRAMP).

Inspired by the Minix1 operating system, Winix includes a full-featured kernel with features such as process and memory management, in-memory file system, exception control, and a user space bourne shell with interactive command line. And, for a bit of fun, you can even play the classic game of snake by simply typing snake in the command line.

Demo

Playing Snake

Using Pipe in shell

Features

• Kernel Memory Management: virtual memory, page mapping
• Process Management: Kernel thread, process creation
• Exception control and interrupt handler
• In-memory file system that supports most of the POSIX api
• A Bourne shell supporting multiple pipes and redirection
• User memory management: malloc() free()
• User coroutine with ucontext.h support
• Stacktrace dump, segfault analysis

Supported Commands

• snake
• shell
• cat
• cp
• echo
• grep
• history
• ls
• mkdir
• mv
• ps
• pwd
• rm
• stat
• test
• touch
• uptime
• wc
• df
• du
• ln
• tail

Unit Test

tests

How to Run

Download the latest Rexsimulator from Here

N.B. mono is required to run in Linux/MacOS environment, Download Instruction

Download the latest WINIX binary winix.srec from Here

Run Rexsimulator.exe

Click Quick Load, select winix.srec

Loading Winix

How to Compile

N.B. Linux environment is required for compilation

Prerequisite

Debian / Ubuntu

sudo apt-get install xutils-dev gcc libbsd-dev

Clone and Compile

git clone https://github.com/halfer53/winix.git
cd winix
make -j$((`nproc`+2))

Debug tips

Debug Makefile

Similar to linux kbuild, Winix supports verbose option, you can debug Makefile by setting verbose to 1

make V=1

Debug Kernel

kprintf(): is your friend.

trace: type trace in shell to print all the syscalls in serial port 2

Supported System Call

• times
• exit
• fork
• vfork
• execve
• brk
• alarm
• sigaction
• sigret
• waitpid
• kill
• getpid
• winfo
• strerror
• dprintf
• sysconf
• sigsuspend
• sigpending
• sigprocmask
• setpgid
• getpgid
• open
• read
• write
• close
• creat
• pipe
• mknod
• chdir
• chown
• chmod
• stat
• fstat
• dup
• dup2
• link
• unlink
• getdent
• access
• mkdir
• sync
• lseek
• umask
• fcntl
• ioctl
• setsid
• nanosleep
• getppid
• signal
• sbrk
• statfs
• getcwd
• tfork
• setitimer

Credits

Paul Monigatti