windows 驱动开发 MDL 内核层 用户层共享内存

参考资料

   https://blog.csdn.net/wdykanq/article/details/7752909

   http://blog.51cto.com/laokaddk/404584

内核层创建内存映射用户层

PVOID pShareMM_SYS;
PMDL pShareMM_MDL;
PVOID pShareMM_User;

PKUANGKEEPROCESS vEProcess = KuangKeGetProcessById(3412);
KAPC_STATE vKapcState;

KeStackAttachProcess((PRKPROCESS)vEProcess, &vKapcState);

pShareMM_SYS = KuangKeAllocate(1024);//size必须是page的整数倍  也可以使用 ExAllocatePoolWithTag(NonPagedPool, _s, 'KUAN')
RtlZeroMemory(pShareMM_SYS, 1024);

pShareMM_MDL = IoAllocateMdl(pShareMM_SYS, 1024, FALSE, FALSE, NULL);
MmBuildMdlForNonPagedPool(pShareMM_MDL);

pShareMM_User = MmMapLockedPagesSpecifyCache(pShareMM_MDL, UserMode, MmCached, NULL, FALSE, NormalPagePriority);
KuangKeDebugPrint("pShareMM_SYS的地址为： 0x%p ", (PUCHAR)pShareMM_SYS);
KuangKeDebugPrint("pShareMM_User的地址为： 0x%p ", (PUCHAR)pShareMM_User);

//MmUnMapLockerPages(pShareMM_MDL);
MmUnmapLockedPages(pShareMM_User, pShareMM_MDL);
IoFreeMdl(pShareMM_MDL);
KuangKeFree(pShareMM_SYS);

KeUnstackDetachProcess(&vKapcState);

用户层映射内核

BaseAddr = OpenKernel32();        //映射kernel32的section到本进程的低2G空间
if (!BaseAddr)
{
KdPrint(("DriverEntry--OpenKernel32 failure! "));
return 0;
}
KdPrint(("BaseAddr: 0x%08x ",BaseAddr));
//创建一个MDL
pMDL = IoAllocateMdl(BaseAddr,0x11c000,FALSE,FALSE,NULL);
if (!pMDL)
{
KdPrint(("pMDL == NULL "));
return 0;
}
_try
{
MmProbeAndLockPages(pMDL,UserMode,IoReadAccess);
}
_except(EXCEPTION_EXECUTE_HANDLER)
{
KdPrint(("MmProbeAndLockPages exception "));
}

_try
{
pMapedAddr = MmMapLockedPagesSpecifyCache(pMDL,KernelMode,MmCached,NULL,FALSE,NormalPagePriority);
if (!pMapedAddr)
{
KdPrint(("pMapedAdd == NULL "));
return 0;
}
}
_except(EXCEPTION_EXECUTE_HANDLER)
{
KdPrint(("MmMapLockedPagesSpecifyCache exception "));
}