插入代码
```    KAPC_STATE APC;
    PEPROCESS pEProc;
    PsLookupProcessByProcessId((HANDLE)0x1B44, &pEProc);
    ObDereferenceObject(pEProc);
    KeStackAttachProcess(pEProc, &APC);

    UINT_PTR Dllmodule = (UINT_PTR)ExAllocatePool(NonPagedPool, 0x1000);

VIRT_ADDR Addr = { (uint64_t)Dllmodule };
    PTE_CR3 Cr3 = { __readcr3() };

    uint64_t a = PFN_TO_PAGE(Cr3.pml4_p) + sizeof(PML4E) * Addr.pml4_index;

PHYSICAL_ADDRESS aaa = { 0 };
    aaa.QuadPart = a;
    PVOID MmMapptr = MmMapIoSpace(aaa, sizeof(PHYSICAL_ADDRESS), MmNonCached);
    DbgPrint("pml4 %p ", a);
    DbgPrint("MmMapptr %p \n", MmMapptr);
    if (MmMapptr)
    {
        MmUnmapIoSpace(MmMapptr, sizeof(PHYSICAL_ADDRESS));
    }

    KeUnstackDetachProcess(&APC);

插入代码
```

#define PFN_TO_PAGE(pfn) ( pfn << 12 )

typedef union CR3_
{
uint64_t value;
struct
{
uint64_t ignored_1 : 3;
uint64_t write_through : 1;
uint64_t cache_disable : 1;
uint64_t ignored_2 : 7;
uint64_t pml4_p : 40;
uint64_t reserved : 12;
};
} PTE_CR3;

typedef union VIRTADDR
{
uint64_t value;
void *pointer;
struct
{
uint64_t offset : 12;
uint64_t pt_index : 9;
uint64_t pd_index : 9;
uint64_t pdpt_index : 9;
uint64_t pml4_index : 9;
uint64_t reserved : 16;
};
} VIRT_ADDR;

为什么我MmMapIoSpace 会返回等于0

难道uint64_t a = PFN_TO_PAGE(Cr3.pml4_p) + sizeof(PML4E) * Addr.pml4_index;

这个a不是物理内存吗

有大佬知道吗

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