Comment by adrian_b

I chose "ioctl" precisely because it has maximum simplicity, in order to show that in "nolibc" it needs externally provided syscall numbers.

Some other syscall wrappers from "nolibc" may be somewhat more complex, by doing some processing on the arguments, before invoking a generic syscall wrapper like "my_syscall3", "my_syscall5" etc. (where the number from the name of the generic syscall wrapper refers to the number of syscall arguments).