Symbol names and function prototypes in ntdll.dll are stable (albeit not officially stable), but system call numbers change frequently: https://j00ru.vexillium.

Symbol names and function prototypes in ntdll.dll are stable (albeit not officially stable), but system call numbers change frequently: https://j00ru.vexillium.org/syscalls/nt/64/ https://j00ru.vexillium.org/syscalls/nt/64/