除了malloc / free之外，程序还需要操作系统提供其他任何东西吗？

I'm working on designing the kernel (which I'm going to actually call the "core" just to be different, but its basically the same) for an OS I'm working on. The specifics of the OS itself are irrelevant if I can't get multi-tasking, memory management, and other basic things up and running, so I need to work on that first. I've some questinos about designing a malloc routine.I'm working on designing the kernel (which I'm