1 files changed, 151 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/nt/alloc-r0drv-nt.cpp b/src/VBox/Runtime/r0drv/nt/alloc-r0drv-nt.cpp
new file mode 100644
index 00000000..ef59491f
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/nt/alloc-r0drv-nt.cpp
@@ -0,0 +1,151 @@
+/* $Id: alloc-r0drv-nt.cpp $ */
+/** @file
+ * IPRT - Memory Allocation, Ring-0 Driver, NT.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-nt-kernel.h"
+#include "internal/iprt.h"
+#include <iprt/mem.h>
+
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+#include "r0drv/alloc-r0drv.h"
+#include "internal-r0drv-nt.h"
+
+
+/**
+ * OS specific allocation function.
+ */
+DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
+{
+    if (!(fFlags & RTMEMHDR_FLAG_ANY_CTX))
+    {
+        PRTMEMHDR pHdr;
+        if (g_pfnrtExAllocatePoolWithTag)
+        {
+            if (!(fFlags & RTMEMHDR_FLAG_EXEC) && g_uRtNtVersion >= RTNT_MAKE_VERSION(8,0))
+                pHdr = (PRTMEMHDR)g_pfnrtExAllocatePoolWithTag(NonPagedPoolNx, cb + sizeof(*pHdr), IPRT_NT_POOL_TAG);
+            else
+                pHdr = (PRTMEMHDR)g_pfnrtExAllocatePoolWithTag(NonPagedPool, cb + sizeof(*pHdr), IPRT_NT_POOL_TAG);
+        }
+        else
+            pHdr = (PRTMEMHDR)ExAllocatePool(NonPagedPool, cb + sizeof(*pHdr));
+        if (pHdr)
+        {
+            pHdr->u32Magic  = RTMEMHDR_MAGIC;
+            pHdr->fFlags    = fFlags;
+            pHdr->cb        = (uint32_t)cb; Assert(pHdr->cb == cb);
+            pHdr->cbReq     = (uint32_t)cb;
+            *ppHdr = pHdr;
+            return VINF_SUCCESS;
+        }
+        return VERR_NO_MEMORY;
+    }
+    return VERR_NOT_SUPPORTED;
+}
+
+
+/**
+ * OS specific free function.
+ */
+DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
+{
+    pHdr->u32Magic += 1;
+    if (g_pfnrtExFreePoolWithTag)
+        g_pfnrtExFreePoolWithTag(pHdr, IPRT_NT_POOL_TAG);
+    else
+        ExFreePool(pHdr);
+}
+
+
+/**
+ * Allocates physical contiguous memory (below 4GB).
+ * The allocation is page aligned and its contents is undefined.
+ *
+ * @returns Pointer to the memory block. This is page aligned.
+ * @param   pPhys   Where to store the physical address.
+ * @param   cb      The allocation size in bytes. This is always
+ *                  rounded up to PAGE_SIZE.
+ */
+RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
+{
+    /*
+     * validate input.
+     */
+    Assert(VALID_PTR(pPhys));
+    Assert(cb > 0);
+
+    /*
+     * Allocate and get physical address.
+     * Make sure the return is page aligned.
+     */
+    PHYSICAL_ADDRESS MaxPhysAddr;
+    MaxPhysAddr.HighPart = 0;
+    MaxPhysAddr.LowPart = 0xffffffff;
+    cb = RT_ALIGN_Z(cb, PAGE_SIZE);
+    void *pv = MmAllocateContiguousMemory(cb, MaxPhysAddr);
+    if (pv)
+    {
+        if (!((uintptr_t)pv & PAGE_OFFSET_MASK))    /* paranoia */
+        {
+            PHYSICAL_ADDRESS PhysAddr = MmGetPhysicalAddress(pv);
+            if (!PhysAddr.HighPart)                 /* paranoia */
+            {
+                *pPhys = (RTCCPHYS)PhysAddr.LowPart;
+                return pv;
+            }
+
+            /* failure */
+            AssertMsgFailed(("MMAllocContiguousMemory returned high address! PhysAddr=%RX64\n", (uint64_t)PhysAddr.QuadPart));
+        }
+        else
+            AssertMsgFailed(("MMAllocContiguousMemory didn't return a page aligned address - %p!\n", pv));
+
+        MmFreeContiguousMemory(pv);
+    }
+
+    return NULL;
+}
+
+
+/**
+ * Frees memory allocated ysing RTMemContAlloc().
+ *
+ * @param   pv      Pointer to return from RTMemContAlloc().
+ * @param   cb      The cb parameter passed to RTMemContAlloc().
+ */
+RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
+{
+    if (pv)
+    {
+        Assert(cb > 0); NOREF(cb);
+        AssertMsg(!((uintptr_t)pv & PAGE_OFFSET_MASK), ("pv=%p\n", pv));
+        MmFreeContiguousMemory(pv);
+    }
+}
+