Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 572 insertions, 0 deletions

diff --git a/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp b/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp
new file mode 100644
index 00000000..4fb0abd8
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp
@@ -0,0 +1,572 @@
+/* $Id: memobj-r0drv-os2.cpp $ */
+/** @file
+ * IPRT - Ring-0 Memory Objects, OS/2.
+ */
+
+/*
+ * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-os2-kernel.h"
+
+#include <iprt/memobj.h>
+#include <iprt/mem.h>
+#include <iprt/err.h>
+#include <iprt/assert.h>
+#include <iprt/log.h>
+#include <iprt/param.h>
+#include <iprt/process.h>
+#include "internal/memobj.h"
+
+
+/*********************************************************************************************************************************
+*   Structures and Typedefs                                                                                                      *
+*********************************************************************************************************************************/
+/**
+ * The OS/2 version of the memory object structure.
+ */
+typedef struct RTR0MEMOBJDARWIN
+{
+    /** The core structure. */
+    RTR0MEMOBJINTERNAL  Core;
+    /** Lock for the ring-3 / ring-0 pinned objectes.
+     * This member might not be allocated for some object types. */
+    KernVMLock_t        Lock;
+    /** Array of physical pages.
+     * This array can be 0 in length for some object types. */
+    KernPageList_t      aPages[1];
+} RTR0MEMOBJOS2, *PRTR0MEMOBJOS2;
+
+
+/*********************************************************************************************************************************
+*   Internal Functions                                                                                                           *
+*********************************************************************************************************************************/
+static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet);
+
+
+DECLHIDDEN(int) rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
+{
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
+    int rc;
+
+    switch (pMemOs2->Core.enmType)
+    {
+        case RTR0MEMOBJTYPE_PHYS_NC:
+            AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
+            return VERR_INTERNAL_ERROR;
+
+        case RTR0MEMOBJTYPE_PHYS:
+            if (!pMemOs2->Core.pv)
+                break;
+
+        case RTR0MEMOBJTYPE_MAPPING:
+            if (pMemOs2->Core.u.Mapping.R0Process == NIL_RTR0PROCESS)
+                break;
+
+            RT_FALL_THRU();
+        case RTR0MEMOBJTYPE_PAGE:
+        case RTR0MEMOBJTYPE_LOW:
+        case RTR0MEMOBJTYPE_CONT:
+            rc = KernVMFree(pMemOs2->Core.pv);
+            AssertMsg(!rc, ("rc=%d type=%d pv=%p cb=%#zx\n", rc, pMemOs2->Core.enmType, pMemOs2->Core.pv, pMemOs2->Core.cb));
+            break;
+
+        case RTR0MEMOBJTYPE_LOCK:
+            rc = KernVMUnlock(&pMemOs2->Lock);
+            AssertMsg(!rc, ("rc=%d\n", rc));
+            break;
+
+        case RTR0MEMOBJTYPE_RES_VIRT:
+        default:
+            AssertMsgFailed(("enmType=%d\n", pMemOs2->Core.enmType));
+            return VERR_INTERNAL_ERROR;
+    }
+
+    return VINF_SUCCESS;
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
+{
+    NOREF(fExecutable);
+
+    /* create the object. */
+    const ULONG cPages = cb >> PAGE_SHIFT;
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
+                                                           RTR0MEMOBJTYPE_PAGE, NULL, cb);
+    if (!pMemOs2)
+        return VERR_NO_MEMORY;
+
+    /* do the allocation. */
+    int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
+    if (!rc)
+    {
+        ULONG cPagesRet = cPages;
+        rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
+        if (!rc)
+        {
+            rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
+            *ppMem = &pMemOs2->Core;
+            return VINF_SUCCESS;
+        }
+        KernVMFree(pMemOs2->Core.pv);
+    }
+    rtR0MemObjDelete(&pMemOs2->Core);
+    return RTErrConvertFromOS2(rc);
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
+{
+    NOREF(fExecutable);
+
+    /* create the object. */
+    const ULONG cPages = cb >> PAGE_SHIFT;
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
+                                                           RTR0MEMOBJTYPE_LOW, NULL, cb);
+    if (!pMemOs2)
+        return VERR_NO_MEMORY;
+
+    /* do the allocation. */
+    int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
+    if (!rc)
+    {
+        ULONG cPagesRet = cPages;
+        rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
+        if (!rc)
+        {
+            rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
+            *ppMem = &pMemOs2->Core;
+            return VINF_SUCCESS;
+        }
+        KernVMFree(pMemOs2->Core.pv);
+    }
+    rtR0MemObjDelete(&pMemOs2->Core);
+    rc = RTErrConvertFromOS2(rc);
+    return rc == VERR_NO_MEMORY ? VERR_NO_LOW_MEMORY : rc;
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
+{
+    NOREF(fExecutable);
+
+    /* create the object. */
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_CONT, NULL, cb);
+    if (!pMemOs2)
+        return VERR_NO_MEMORY;
+
+    /* do the allocation. */
+    ULONG ulPhys = ~0UL;
+    int rc = KernVMAlloc(cb, VMDHA_FIXED | VMDHA_CONTIG, &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
+    if (!rc)
+    {
+        Assert(ulPhys != ~0UL);
+        pMemOs2->Core.u.Cont.Phys = ulPhys;
+        *ppMem = &pMemOs2->Core;
+        return VINF_SUCCESS;
+    }
+    rtR0MemObjDelete(&pMemOs2->Core);
+    return RTErrConvertFromOS2(rc);
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
+{
+    AssertMsgReturn(PhysHighest >= 16 *_1M, ("PhysHigest=%RHp\n", PhysHighest), VERR_NOT_SUPPORTED);
+
+    /** @todo alignment  */
+    if (uAlignment != PAGE_SIZE)
+        return VERR_NOT_SUPPORTED;
+
+    /* create the object. */
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
+    if (!pMemOs2)
+        return VERR_NO_MEMORY;
+
+    /* do the allocation. */
+    ULONG ulPhys = ~0UL;
+    int rc = KernVMAlloc(cb, VMDHA_FIXED | VMDHA_CONTIG | (PhysHighest < _4G ? VMDHA_16M : 0), &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
+    if (!rc)
+    {
+        Assert(ulPhys != ~0UL);
+        pMemOs2->Core.u.Phys.fAllocated = true;
+        pMemOs2->Core.u.Phys.PhysBase = ulPhys;
+        *ppMem = &pMemOs2->Core;
+        return VINF_SUCCESS;
+    }
+    rtR0MemObjDelete(&pMemOs2->Core);
+    return RTErrConvertFromOS2(rc);
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
+{
+    /** @todo rtR0MemObjNativeAllocPhys / darwin. */
+    return rtR0MemObjNativeAllocPhys(ppMem, cb, PhysHighest, PAGE_SIZE);
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy)
+{
+    AssertReturn(uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_SUPPORTED);
+
+    /* create the object. */
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
+    if (!pMemOs2)
+        return VERR_NO_MEMORY;
+
+    /* there is no allocation here, right? it needs to be mapped somewhere first. */
+    pMemOs2->Core.u.Phys.fAllocated = false;
+    pMemOs2->Core.u.Phys.PhysBase = Phys;
+    pMemOs2->Core.u.Phys.uCachePolicy = uCachePolicy;
+    *ppMem = &pMemOs2->Core;
+    return VINF_SUCCESS;
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess,
+                                         RTR0PROCESS R0Process)
+{
+    AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
+
+    /* create the object. */
+    const ULONG cPages = cb >> PAGE_SHIFT;
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
+                                                           RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb);
+    if (!pMemOs2)
+        return VERR_NO_MEMORY;
+
+    /* lock it. */
+    ULONG cPagesRet = cPages;
+    int rc = KernVMLock(VMDHL_LONG | (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
+                        (void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
+    if (!rc)
+    {
+        rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
+        Assert(cb == pMemOs2->Core.cb);
+        Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
+        pMemOs2->Core.u.Lock.R0Process = R0Process;
+        *ppMem = &pMemOs2->Core;
+        return VINF_SUCCESS;
+    }
+    rtR0MemObjDelete(&pMemOs2->Core);
+    return RTErrConvertFromOS2(rc);
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
+{
+    /* create the object. */
+    const ULONG cPages = cb >> PAGE_SHIFT;
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
+                                                           RTR0MEMOBJTYPE_LOCK, pv, cb);
+    if (!pMemOs2)
+        return VERR_NO_MEMORY;
+
+    /* lock it. */
+    ULONG cPagesRet = cPages;
+    int rc = KernVMLock(VMDHL_LONG | (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
+                        pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
+    if (!rc)
+    {
+        rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
+        pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
+        *ppMem = &pMemOs2->Core;
+        return VINF_SUCCESS;
+    }
+    rtR0MemObjDelete(&pMemOs2->Core);
+    return RTErrConvertFromOS2(rc);
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
+{
+    RT_NOREF(ppMem, pvFixed, cb, uAlignment);
+    return VERR_NOT_SUPPORTED;
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment,
+                                            RTR0PROCESS R0Process)
+{
+    RT_NOREF(ppMem, R3PtrFixed, cb, uAlignment, R0Process);
+    return VERR_NOT_SUPPORTED;
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
+                                          unsigned fProt, size_t offSub, size_t cbSub)
+{
+    AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
+    AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
+
+    /*
+     * Check that the specified alignment is supported.
+     */
+    if (uAlignment > PAGE_SIZE)
+        return VERR_NOT_SUPPORTED;
+
+
+/** @todo finish the implementation. */
+
+    int rc;
+    void *pvR0 = NULL;
+    PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
+    switch (pMemToMapOs2->Core.enmType)
+    {
+        /*
+         * These has kernel mappings.
+         */
+        case RTR0MEMOBJTYPE_PAGE:
+        case RTR0MEMOBJTYPE_LOW:
+        case RTR0MEMOBJTYPE_CONT:
+            pvR0 = pMemToMapOs2->Core.pv;
+            break;
+
+        case RTR0MEMOBJTYPE_PHYS:
+            pvR0 = pMemToMapOs2->Core.pv;
+            if (!pvR0)
+            {
+                /* no ring-0 mapping, so allocate a mapping in the process. */
+                AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
+                Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
+                ULONG ulPhys = (ULONG)pMemToMapOs2->Core.u.Phys.PhysBase;
+                AssertReturn(ulPhys == pMemToMapOs2->Core.u.Phys.PhysBase, VERR_OUT_OF_RANGE);
+                rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
+                if (rc)
+                    return RTErrConvertFromOS2(rc);
+                pMemToMapOs2->Core.pv = pvR0;
+            }
+            break;
+
+        case RTR0MEMOBJTYPE_PHYS_NC:
+            AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
+            return VERR_INTERNAL_ERROR_3;
+
+        case RTR0MEMOBJTYPE_LOCK:
+            if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
+                return VERR_NOT_SUPPORTED; /** @todo implement this... */
+            pvR0 = pMemToMapOs2->Core.pv;
+            break;
+
+        case RTR0MEMOBJTYPE_RES_VIRT:
+        case RTR0MEMOBJTYPE_MAPPING:
+        default:
+            AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
+            return VERR_INTERNAL_ERROR;
+    }
+
+    /*
+     * Create a dummy mapping object for it.
+     *
+     * All mappings are read/write/execute in OS/2 and there isn't
+     * any cache options, so sharing is ok. And the main memory object
+     * isn't actually freed until all the mappings have been freed up
+     * (reference counting).
+     */
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
+                                                           pvR0, pMemToMapOs2->Core.cb);
+    if (pMemOs2)
+    {
+        pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
+        *ppMem = &pMemOs2->Core;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
+{
+    AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
+    AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
+    if (uAlignment > PAGE_SIZE)
+        return VERR_NOT_SUPPORTED;
+
+    int rc;
+    void *pvR0;
+    void *pvR3 = NULL;
+    PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
+    switch (pMemToMapOs2->Core.enmType)
+    {
+        /*
+         * These has kernel mappings.
+         */
+        case RTR0MEMOBJTYPE_PAGE:
+        case RTR0MEMOBJTYPE_LOW:
+        case RTR0MEMOBJTYPE_CONT:
+            pvR0 = pMemToMapOs2->Core.pv;
+            break;
+
+        case RTR0MEMOBJTYPE_PHYS:
+            pvR0 = pMemToMapOs2->Core.pv;
+#if 0/* this is wrong. */
+            if (!pvR0)
+            {
+                /* no ring-0 mapping, so allocate a mapping in the process. */
+                AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
+                Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
+                ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
+                rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS | VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
+                if (rc)
+                    return RTErrConvertFromOS2(rc);
+            }
+            break;
+#endif
+            return VERR_NOT_SUPPORTED;
+
+        case RTR0MEMOBJTYPE_PHYS_NC:
+            AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
+            return VERR_INTERNAL_ERROR_5;
+
+        case RTR0MEMOBJTYPE_LOCK:
+            if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
+                return VERR_NOT_SUPPORTED; /** @todo implement this... */
+            pvR0 = pMemToMapOs2->Core.pv;
+            break;
+
+        case RTR0MEMOBJTYPE_RES_VIRT:
+        case RTR0MEMOBJTYPE_MAPPING:
+        default:
+            AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
+            return VERR_INTERNAL_ERROR;
+    }
+
+    /*
+     * Map the ring-0 memory into the current process.
+     */
+    if (!pvR3)
+    {
+        Assert(pvR0);
+        ULONG flFlags = 0;
+        if (uAlignment == PAGE_SIZE)
+            flFlags |= VMDHGP_4MB;
+        if (fProt & RTMEM_PROT_WRITE)
+            flFlags |= VMDHGP_WRITE;
+        rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
+        if (rc)
+            return RTErrConvertFromOS2(rc);
+    }
+    Assert(pvR3);
+
+    /*
+     * Create a mapping object for it.
+     */
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
+                                                           pvR3, pMemToMapOs2->Core.cb);
+    if (pMemOs2)
+    {
+        Assert(pMemOs2->Core.pv == pvR3);
+        pMemOs2->Core.u.Mapping.R0Process = R0Process;
+        *ppMem = &pMemOs2->Core;
+        return VINF_SUCCESS;
+    }
+    KernVMFree(pvR3);
+    return VERR_NO_MEMORY;
+}
+
+
+DECLHIDDEN(int) rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
+{
+    NOREF(pMem);
+    NOREF(offSub);
+    NOREF(cbSub);
+    NOREF(fProt);
+    return VERR_NOT_SUPPORTED;
+}
+
+
+DECLHIDDEN(RTHCPHYS) rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
+{
+    PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
+
+    switch (pMemOs2->Core.enmType)
+    {
+        case RTR0MEMOBJTYPE_PAGE:
+        case RTR0MEMOBJTYPE_LOW:
+        case RTR0MEMOBJTYPE_LOCK:
+        case RTR0MEMOBJTYPE_PHYS_NC:
+            return pMemOs2->aPages[iPage].Addr;
+
+        case RTR0MEMOBJTYPE_CONT:
+            return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
+
+        case RTR0MEMOBJTYPE_PHYS:
+            return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
+
+        case RTR0MEMOBJTYPE_RES_VIRT:
+        case RTR0MEMOBJTYPE_MAPPING:
+        default:
+            return NIL_RTHCPHYS;
+    }
+}
+
+
+/**
+ * Expands the page list so we can index pages directly.
+ *
+ * @param   paPages         The page list array to fix.
+ * @param   cPages          The number of pages that's supposed to go into the list.
+ * @param   cPagesRet       The actual number of pages in the list.
+ */
+static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
+{
+    Assert(cPages >= cPagesRet);
+    if (cPages != cPagesRet)
+    {
+        ULONG iIn = cPagesRet;
+        ULONG iOut = cPages;
+        do
+        {
+            iIn--;
+            iOut--;
+            Assert(iIn <= iOut);
+
+            KernPageList_t Page = paPages[iIn];
+            Assert(!(Page.Addr & PAGE_OFFSET_MASK));
+            Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
+
+            if (Page.Size > PAGE_SIZE)
+            {
+                do
+                {
+                    Page.Size -= PAGE_SIZE;
+                    paPages[iOut].Addr = Page.Addr + Page.Size;
+                    paPages[iOut].Size = PAGE_SIZE;
+                    iOut--;
+                } while (Page.Size > PAGE_SIZE);
+            }
+
+            paPages[iOut].Addr = Page.Addr;
+            paPages[iOut].Size = PAGE_SIZE;
+        } while (   iIn != iOut
+                 && iIn > 0);
+    }
+}
+