OS programming with Rust

can Rust use syscall in Linux or macOS?
I wanted to system programming with Rust in Windows and Linux and macOS.
can it be like C?
use syscall integrate with OS ?
can I use Assembly in Rust?

You can certainly use assembly and syscalls. Take a look at this file from the syscall crate to see how it's done. You may need nightly for this.

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Rust is a pretty low-level language like C.
They've even written an Operating System in it called Redox:


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