Microsoft also changes the kernel syscalls between releases. It's not unusual for operating systems to specify ABI at the libc level, in fact I believe Linux is

Microsoft also changes the kernel syscalls between releases. It's not unusual for operating systems to specify ABI at the libc level, in fact I believe Linux is the odd one out to specify ABI at the syscall level. https://j00ru.vexillium.org/syscalls/nt/64/ https://j00ru.vexillium.org/syscalls/nt/64/