what's the right way to use custom entry point

[Florian Weimer]

* Cong Monkey:

>> The easiest way is to link against an existing libc, or at least its
>> startup code.
>
> If I use custom entry point, the argc and argv I get is very strange,
> it's not the same as I get from normally main entry point!

That's expected.  You have to implement your own startup code.  It's
the reason why linking against an existing libc is the easiest
solution.