About the partial clone problem: `clone_area` and then `munmap` works properly.

```cpp
#include <iostream>

#include <OS.h>
#include <string.h>
#include <sys/mman.h>

int main()
{
    void* originalAddr = NULL;
    int id = create_area("original area", &originalAddr, B_ANY_ADDRESS, B_PAGE_SIZE * 3, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA);

    void* clonedAddr = NULL;
    int clonedId = clone_area("cloned area", &clonedAddr, B_ANY_ADDRESS, B_READ_AREA | B_EXECUTE_AREA, id);

    munmap(clonedAddr, B_PAGE_SIZE);
    munmap((uint8_t*)clonedAddr + B_PAGE_SIZE * 2, B_PAGE_SIZE);

    uint8_t asm_bytes[]
    {
        // mov rax, 0x0B5E
        0x48, 0xc7, 0xc0, 0x5E, 0x0B, 0x00, 0x00,
        // ret
        0xc3
    };

    memcpy((uint8_t*)originalAddr + B_PAGE_SIZE, asm_bytes, sizeof(asm_bytes));

    int (*func)() = (int (*)())((uint8_t*)clonedAddr + B_PAGE_SIZE);

    std::cout << func() << std::endl;

    return 0;
}
```