xv6-mac-m1

• Running xv6 on mac m1 processor.
• Adding a System Call in xv6 kernel.

Setup

Install qemu

brew install qemu

Download xv6 (risc-v) version of code from github

git clone https://github.com/mit-pdos/xv6-riscv.git

Install RISC-V Compiler toolchain

brew tap riscv/riscv
brew install riscv-tools

Compile and build xv6

cd xv6-riscv make clean make

Running xv6

To start xv6 on qemu and run commands

cd xv6-riscv
make qemu
$ls
$iocount

To exit from xv6 terminal

ctrl+A X

Changes made to xv6 code

Added a system call getiocount() in the xv6 kernel

Files modified:

• Makefile
• kernel/sysproc.c
• kernel/sysfile.c
• kernel/syscall.c
• kernel/syscall.h
• user/user.h
• user/usys.pl