/$$$$$$  /$$                 /$$ /$$                      /$$$$$$                        /$$
 /$$__  $$| $$                | $$|__/                     /$$__  $$                      | $$
| $$  \__/| $$   /$$ /$$   /$$| $$ /$$ /$$$$$$$   /$$$$$$ | $$  \__/ /$$   /$$  /$$$$$$$ /$$$$$$    /$$$$$$  /$$$$$$/$$$$
|  $$$$$$ | $$  /$$/| $$  | $$| $$| $$| $$__  $$ /$$__  $$|  $$$$$$ | $$  | $$ /$$_____/|_  $$_/   /$$__  $$| $$_  $$_  $$
 \____  $$| $$$$$$/ | $$  | $$| $$| $$| $$  \ $$| $$$$$$$$ \____  $$| $$  | $$|  $$$$$$   | $$    | $$$$$$$$| $$ \ $$ \ $$
 /$$  \ $$| $$_  $$ | $$  | $$| $$| $$| $$  | $$| $$_____/ /$$  \ $$| $$  | $$ \____  $$  | $$ /$$| $$_____/| $$ | $$ | $$
|  $$$$$$/| $$ \  $$|  $$$$$$$| $$| $$| $$  | $$|  $$$$$$$|  $$$$$$/|  $$$$$$$ /$$$$$$$/  |  $$$$/|  $$$$$$$| $$ | $$ | $$
 \______/ |__/  \__/ \____  $$|__/|__/|__/  |__/ \_______/ \______/  \____  $$|_______/    \___/   \_______/|__/ |__/ |__/
                     /$$  | $$                                       /$$  | $$
                    |  $$$$$$/                                      |  $$$$$$/
                     \______/                                        \______/

License

• kernel/: GPL-2.0-only
• lib/ programs/ ablib/atomic/: MIT License Kernel and userspace run in separate address spaces, communicate only via syscall, no GPL copyleft infection. Full compliance with REUSE standard, see root LICENSES for full statement.
• /ablib/freestndchdrs/: This directory is licensed under the GNU General Public License v3.0 (GPLv3), supplemented with the GCC Runtime Library Exception 3.1.
  • What this means: You may link this library into your proprietary/closed-source application without being required to release your own source code.
  • Please refer to COPYING3.RUNTIME within that folder for full details.

Caution

Don't run it in real machine because it's now in test If Build Failed, please open an issue or contact me The General Build Faild reason is you don't have install the required dependencies
[OR] You are building for unsupported architecture

---

⚙️ SkylineSystem Low-Level Stack Implementations

I have independently designed and implemented a comprehensive low-level stack from scratch:

💾 Memory Management VMM: 5-level paging, 1GB/2MB huge pages, and copy-on-write with dynamic huge page splitting. PMM: 3-level physical manager with lazy bitmap initialization and per-CPU caches to eliminate spinlock contention.	⚡ Core & Concurrency Allocator: malloc/free engine with QSBR garbage collection, TLS batching, and lock-free bitmap CAS. VFS & FD: Hashmap mount point resolution and bitmap-based file descriptor allocator with O(1) tail insertion.
🎨 Graphics & UI Graphics: TTF rasterization engine with LRU+hashtable glyph caching, CJK typography rules, and strict boundary-clipped alpha blending for the linear framebuffer.

How to build

Important

Make sure you have install these software in linux

• gcc (VER > 10)
• binutil
• xorriso
• make
• e2cp (ext2/3/4 tool) Run with this command in the project root dir

You can build this project(x86_64 arch) with these commands:

cd kernel && ./get-deps
cd .. && make limine-binary/limine
#If can't run get-deps script, you can run "chmod +x kernel/get-deps"
make cm

Build Template(Not applicable to x86_64)

Caution

You must edit the 'BUILD_ARCH' variable in 'gdef.mk' file to set the architecture you want to build for.

For example if you want to build aarch64 OS,In gdef.mk you must change:

- # BUILD_ARCH = x86_64
+ BUILD_ARCH = aarch64

make cm KCC=(XXX arch)-linux-gnu-gcc KCXX=(XXX arch)-linux-gnu-g++ KLD=(XXX arch)-linux-gnu-ld

For example, to build aarch64 arch, run:

make cm KCC=aarch64-linux-gnu-gcc KCXX=aarch64-linux-gnu-g++ KLD=aarch64-linux-gnu-ld BUILD_ARCH=aarch64

Run

In Linux:

# just run x86_64 qemu example command
qemu-system-x86_64 -machine q35 -cpu max \
-cdrom ./SkylineSystem-x86_64.iso -m 2G -smp 4 \
-serial stdio -net nic -device AC97 \
-drive file=disk.img,if=none,id=drive0 \
-device ide-hd,drive=drive0,bus=ide.0 \
-no-reboot --no-shutdown \
-gdb tcp::26000 -monitor telnet:127.0.0.1:4444,server,nowait 

In WSL(Windows Subsystem for Linux):

see ./res/scripts/ folder run the arch you need to run

Debug

#first run qemu
# just run x86_64 qemu example command
qemu-system-x86_64 -machine q35 -cpu max \
-cdrom ./SkylineSystem-x86_64.iso -m 2G -smp 4 \
-serial stdio -net nic -device AC97 \
-drive file=disk.img,if=none,id=drive0 \
-device ide-hd,drive=drive0,bus=ide.0 \
-no-reboot --no-shutdown \
-gdb tcp::26000 -monitor telnet:127.0.0.1:4444,server,nowait -S
#run gdb on kernel folder
cd kernel && gdb

In GDB:

#and enter these command in gdb
target remote :26000
file kernel
#do like you what you want to do than

Thanks to

• MaslOS
• VisualOS
• MicroOS
• MaslOS-2
• HanOS
• SAF

Main Contributors

• Yo-yo-ooo
• marceldobehere
• Arty3
• 人造人(qq:1440332527)

Connect

You can connect with e-mail 1218849168@qq.com