保存

在DDK的例子Mapmem中，用ZwMapViewOfSection將物理地址映射到App空間，該函數能否將系統地址映射到App空間？

我嘗試著做了一下，但返回invalid_view_size，好像length給的不對。各位大俠幫忙看看啊。

PVOID

GetUserAddressFromSystemAddress(IN PVOID iSystemAddress,///系統地址

IN ULONG iBufferLength ?///地址空間長度

)

{

UNICODE_STRING ? ? systemMemoryUnicodeString;

OBJECT_ATTRIBUTES ?objectAttributes;

HANDLE ? ? ? ? ? ? systemMemoryHandle ?= NULL;

PVOID ? ? ? ? ? ? ?systemMemorySection = NULL;

NTSTATUS ? ? ? ? ? ntStatus;

PVOID ? ? ? ? ? ? ?virtualAddress;

ULONG length=iBufferLength;

LARGE_INTEGER lSystemAddress;

KIRQL irql=KeGetCurrentIrql();

RtlInitUnicodeString (&systemMemoryUnicodeString,

L\"\\\\Device\\\\SystemMemory\");

InitializeObjectAttributes(&objectAttributes,///OUT

&systemMemoryUnicodeString, ?///the ObjectName

OBJ_CASE_INSENSITIVE, ?the Attributes

(HANDLE) NULL,

(PSECURITY_DESCRIPTOR) NULL);

ntStatus = ZwOpenSection(&systemMemoryHandle, //SectionHandle OUT

SECTION_ALL_ACCESS,///DesireAccess

&objectAttributes);///ObjectAttributes

if (!NT_SUCCESS(ntStatus))

{

return NULL;

}

ntStatus = ObReferenceObjectByHandle (systemMemoryHandle,//got by ZwOpenSection

SECTION_ALL_ACCESS,

(POBJECT_TYPE) NULL,

KernelMode,

&systemMemorySection,//OUT Pointer to the object bocy

(POBJECT_HANDLE_INFORMATION) NULL);

///OUT points to the struture receives the handle attributes

///and the granted access rights for the object

if (!NT_SUCCESS(ntStatus))

{

goto close_handle;

}

virtualAddress = NULL;

///存放Driver分配的系統地址

lSystemAddress.QuadPart=(LONGLONG)iSystemAddress;

// Map the section

ntStatus = ZwMapViewOfSection(systemMemoryHandle,

(HANDLE) -1,

&virtualAddress,

0L,///IN ZeroBits

length,

&lSystemAddress,

&length,

ViewShare,

0,

PAGE_READWRITE | PAGE_NOCACHE);

if (!NT_SUCCESS(ntStatus))

{

goto close_handle;

}

//

return virtualAddress;

close_handle:

ZwClose (systemMemoryHandle);

return NULL;

}

總結

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