cLinux

An experimental componentized Linux Kernel. My goal is to build different types of OS based on component lib.

Now most of the components are extracted from Linux Kernel and organized into a component lib. In future, I plan to introduce components from other OS kernel.

Components can be written in C or Rust.

🚧 Working In Progress.

Build & Run

Run environment

Put qemu & opensbi at the same level with clinux.

graph TD;
top_directory --> qemu
top_directory --> opensbi
top_directory --> clinux

OpenSBI

git clone https://github.com/riscv/opensbi.git --depth 1
make PLATFORM=generic CROSS_COMPILE=riscv64-linux-gnu- PLATFORM_RISCV_XLEN=64

Qemu

git clone https://git.qemu.org/git/qemu.git --depth 1
./configure --target-list=riscv64-softmmu
make

cLinux

Build & Test for c_depot

make tools
cd c_depot
make clean && make && make bootrd
make justrun

Now there're three profiles

$ make profiles
Bootrd filename: ./output/bootrd.disk

Bootrd profiles: total[4]:
Bootrd profiles: offset(3a11d0) curr[3a11d0]:
  -> [0]: hello_world[3a11d0]
     [1]: arceos_hello[3a1208]
     [2]: memory_addr[3a1268]
     [3]: linux[3a12a8]

In default, this is a Unikernel-style OS (Components from ArceOS). We can change the profile

$ tools/ch_bootrd/ch_bootrd ./output/bootrd.disk -s 3
Bootrd filename: ./output/bootrd.disk

Bootrd profiles: total[4]:
Bootrd profiles: offset(3a11d0) curr[3a11d0]:
     [0]: hello_world[3a11d0]
     [1]: arceos_hello[3a1208]
     [2]: memory_addr[3a1268]
  -> [3]: linux[3a12a8]

And then, run again

$ ./scripts/qemu.sh

[...]

do_read_fault: addr(51000) pgoff(41) flags(254)
page_add_file_rmap: NOT implemented!
alloc_set_pte: addr(51000) entry(200D8C5B)
_ksys_write: 1 fd(1)
_ksys_write: 2
serial8250_tx_chars: send count(16) ...
[Hello, world!]
vfs_write: ret(17)
--- --- _do_page_fault: cause(D) addr(78200)
--- handle_pte_fault: vmf: addr(78000) flags(254) pgoff(78)
do_anonymous_page: addr(78000) pgoff(78) flags(254)
--- --- _do_page_fault: cause(F) addr(781F8)
--- handle_pte_fault: vmf: addr(78000) flags(255) pgoff(78)
--- wp_page_copy: 1.2
--- wp_page_copy: 3
_do_group_exit: ...

########################
PANIC: do_exit (sys/exit.c:12)
NOW user-space app exit! [0]
########################
cloud@server:~/gitStudy/clinux$

Now this is a Linux-kernel-like OS from boot to first user-process(init). For experiment, this user-process init just prints [Hello, wolrd!] and exit.

Build & Test for rust_depot(Components from ArceOS)

make tools
cd rust_depot
make clean && make && make bootrd
make justrun

And we can use make profiles to check all profiles available.