An easier way than reading through that macro hell:
```
#include <OS.h>
#include <arch/x86/arch_kernel.h>

#include <iostream>

int main()
{
    void* startAddress = (void*)(USER_TOP + 1 - B_PAGE_SIZE);
    std::cout << "startAddress: " << startAddress << std::endl;
    std::cout << create_area("top test", &startAddress, B_EXACT_ADDRESS, B_PAGE_SIZE, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA) << std::endl;
}
```