syscall numbers of sys_open and sys_openat are confusing

[itewqq]

In os/src/syscall/mod.rs#L1 the syscall number for sys_open is 56, how ever in this refrence 56 points to sys_openat

Also, in rcore-os/rcore_tutorial_tests/ the number 56 is also pointing to sys_openat. I'm not sure if that was intended here. 🤔