rxv64

My POV: Rust for OS kernel programming, e.g https://github.com/dancrossnyc/rxv64 And go for practically anything outside that scope: web service, CLI tool, etc.

> True, but when making an OS, assembly code is an incredibly small part of it. A few comments up this thread i briefly mentioned r/xv6 entry.S, so here’s what i meant: rv64: https://github.com/mit-pdos/xv6-riscv/blob/riscv/kernel/entr... amd64: https://github.com/dancrossnyc/rxv64/blob/main/kernel/src/en... > You basically need to run a few instructions to put the processor in the right mode, and you need ONE line of assembly code (often inline C) to allow usermode to call supervisor mode. Right… Please see above. Also, in riscv land we have machine, supervisor and user modes, with hypervisor mode being in the works. > When choosing an architecture for a learning OS, I think other factors would dominate, like availability of hardware (many people have a PC already, saving them $100-$200 on RISC-V hardware). yet, MIT PDOS thinks Fabrice B

It's targeting just amd64, so depends on how smooth you consider emulating it on ARM to be. (eg https://github.com/dancrossnyc/rxv64/blob/main/kernel/src/sw... )

okay, fair. i only got misled by the title of the post, which claims all-rust xv6 port. now that we cleared the userland part, here’s what I’m contemplating on the kernel side. i can’t think of anything simpler and more staple than this, so: https://github.com/dancrossnyc/rxv64/blob/main/kernel/src/ua... https://github.com/mit-pdos/xv6-riscv/blob/riscv/kernel/uart... honestly - i don’t feel at ease to tell which driver code is more instructional, which is easier to read, which is better documented, which is better covered with tests, which has more unsafety built into it (explicit or otherwise), what size are the object files, and what is easier to cross-compile and run on the designated target from, say, one of now-ubiquitous apple silicon devices. lest we forget that the whole point of it is “pedagogical”, i.e. to learn something about

How does this compare with https://github.com/dancrossnyc/rxv64 ? From its README.md: rxv64 is a pedagogical operating system written in Rust that targets multiprocessor x86_64 machines. It is a reimplementation of the xv6 operating system from MIT.