enter into the lab root directory

 $ cd /path/to/linux-0.11-lab/

apply the syscall changes

 $ patch -p1 < examples/syscall/syscall.patch

compile the kernel

 $ make

copy examples/syscall/syscall.s to the rootfile system: usr/root/

• follow 'Hack Rootfs' of (linux-0.11-lab)/README.md

• ex.:

    $ make hda # make sure hdc image is decompressed
    $ sudo mount -o offset=$((2*512)) rootfs/hdc-0.11.img /path/to/hdc
    $ sudo cp examples/syscall/syscall.s /path/to/hdc/usr/root/
    $ sync
    $ sudo umount /path/to/hdc
  

start the new kernel and new filesystem

• ex.:

    $ make start-hd
  

compile and link

 $ as -o syscall.o syscall.s
 $ ld -o syscall syscall.o

run it in emulator

 $ ./syscall
 Hello, Linux 0.11