Windows calls their syscall wrapper ntdll.dll, not libc.so; but it's conceptually the same thing. The ntdll.dll ABI is public & stable, the underlying syscall

Windows calls their syscall wrapper ntdll.dll, not libc.so; but it's conceptually the same thing. The ntdll.dll ABI is public & stable, the underlying syscall ABI isn't. Several unixoids do the same thing, where their libc.so ABI is public & stable, but the underlying syscall ABI isn't.