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caspper69

Right, I understand that. You can do the same on Windows too.

My point was that most languages' runtimes don't do that, not that they can't do that.

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I think NT syscalls can change. https://j00ru.vexillium.org/syscalls/nt/64/

You're meant to go through ntdll.dll, but even that interface is documented as private/unstable.

You're absolutely right, they can.

And they have.

But the reality is more like this: https://xkcd.com/1172/

You're meant to go through published interfaces, such as the ones in kernel32.dll. ntdll is an implementation detail and so are syscalls.

Because then they would face additional portability hurdles that they can avoid by targeting POSIX. Even decent porting to Windows is possible (speaking of which) via POSIX.

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