[laumars]

Could you instead write your own syscalls but also your own $GOOS target for the compiler?

That's possibly more work but it's the approach I would have taken as it seems more fun than just replicating Linux (or whatever) syscalls.

[driusan]

Sure, you could, but then you need to fork the Go compiler too (and hopefully eventually get your GOOS target mainlined, which seems unlikely unless your OS gets popular) or you could do your userspace in something other than Go and implement what you need for that.

My point was just the memory allocation and paging isn't significantly different than it would be writing an OS in any other language, it's once you get to the part where you need to implement other people's interfaces/standards to make a viable product that it starts bogging down (if you go that route. If you go your route, then you have two major projects instead of one: writing an OS, and adding a new OS target to an existing toolchain.)