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, 183 insertions, 0 deletions

diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PagingAlias.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PagingAlias.c
new file mode 100644
index 00000000..a7742af8
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PagingAlias.c
@@ -0,0 +1,183 @@
+/* $Id: bs3-cmn-PagingAlias.c $ */
+/** @file
+ * BS3Kit - Bs3PagingAlias, Bs3PagingUnalias
+ */
+
+/*
+ * Copyright (C) 2007-2019 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 "bs3kit-template-header.h"
+#include "bs3-cmn-paging.h"
+#include "iprt/asm-amd64-x86.h"
+
+
+#undef Bs3PagingAlias
+BS3_CMN_DEF(int, Bs3PagingAlias,(uint64_t uDst, uint64_t uPhysToAlias, uint32_t cbHowMuch, uint64_t fPte))
+{
+#if ARCH_BITS == 16
+    if (!BS3_MODE_IS_V86(g_bBs3CurrentMode))
+#endif
+    {
+        RTCCUINTXREG    cr3 = ASMGetCR3();
+        uint32_t        cPages;
+        int             rc;
+
+        /*
+         * Validate and adjust the input a little.
+         */
+        if (uDst & X86_PAGE_OFFSET_MASK)
+        {
+            cbHowMuch += X86_PAGE_SIZE - (uDst & X86_PAGE_OFFSET_MASK);
+            uDst      &= ~(uint64_t)X86_PAGE_OFFSET_MASK;
+        }
+        uPhysToAlias &= X86_PTE_PAE_PG_MASK;
+        fPte         &= ~(X86_PTE_PAE_MBZ_MASK_NX | X86_PTE_PAE_PG_MASK);
+        cbHowMuch     = RT_ALIGN_32(cbHowMuch, X86_PAGE_SIZE);
+        cPages        = cbHowMuch >> X86_PAGE_SHIFT;
+        //Bs3TestPrintf("Bs3PagingAlias: adjusted: uDst=%RX64 uPhysToAlias=%RX64 cbHowMuch=%RX32 fPte=%Rx64 cPages=%RX32\n", uDst, uPhysToAlias, cbHowMuch, fPte, cPages);
+        if (BS3_MODE_IS_LEGACY_PAGING(g_bBs3CurrentMode))
+        {
+            X86PTE BS3_FAR *pPteLegacy;
+            uint32_t        uDst32 = (uint32_t)uDst;
+            uint32_t        uPhysToAlias32 = (uint32_t)uPhysToAlias;
+            if (uDst32 != uDst)
+            {
+                Bs3TestPrintf("warning: Bs3PagingAlias - uDst=%RX64 is out of range for legacy paging!\n", uDst);
+                return VERR_INVALID_PARAMETER;
+            }
+            if (uPhysToAlias32 != uPhysToAlias)
+            {
+                Bs3TestPrintf("warning: Bs3PagingAlias - uPhysToAlias=%RX64 is out of range for legacy paging!\n", uPhysToAlias);
+                return VERR_INVALID_PARAMETER;
+            }
+
+            /*
+             * Trigger page table splitting first.
+             */
+            while (cPages > 0)
+            {
+                pPteLegacy = bs3PagingGetLegacyPte(cr3, uDst32, false, &rc);
+                if (pPteLegacy)
+                {
+                    uint32_t cLeftInPt = X86_PG_ENTRIES - ((uDst32 >> X86_PT_SHIFT) & X86_PT_MASK);
+                    if (cPages <= cLeftInPt)
+                        break;
+                    uDst32 += cLeftInPt << X86_PAGE_SHIFT;
+                    cPages -= cLeftInPt;
+                }
+                else
+                {
+                    Bs3TestPrintf("warning: Bs3PagingAlias - bs3PagingGetLegacyPte failed: rc=%d\n", rc);
+                    return rc;
+                }
+            }
+
+            /*
+             * Make the changes.
+             */
+            cPages = cbHowMuch >> X86_PAGE_SHIFT;
+            uDst32 = (uint32_t)uDst;
+            while (cPages > 0)
+            {
+                uint32_t cLeftInPt = X86_PG_ENTRIES - ((uDst32 >> X86_PT_SHIFT) & X86_PT_MASK);
+                pPteLegacy = bs3PagingGetLegacyPte(cr3, uDst32, false, &rc);
+                while (cLeftInPt > 0 && cPages > 0)
+                {
+                    pPteLegacy->u = uPhysToAlias32 | (uint32_t)fPte;
+                    pPteLegacy++;
+                    uDst32         += X86_PAGE_SIZE;
+                    uPhysToAlias32 += X86_PAGE_SIZE;
+                    cPages--;
+                    cLeftInPt--;
+                }
+            }
+        }
+        else
+        {
+            X86PTEPAE BS3_FAR *pPtePae;
+            uint64_t const uDstSaved = uDst;
+
+            /*
+             * Trigger page table splitting first.
+             */
+            while (cPages > 0)
+            {
+                pPtePae = bs3PagingGetPaePte(cr3, g_bBs3CurrentMode, uDst, false, &rc);
+                if (pPtePae)
+                {
+                    uint32_t cLeftInPt = X86_PG_PAE_ENTRIES - ((uDst >> X86_PT_PAE_SHIFT) & X86_PT_PAE_MASK);
+                    if (cPages <= cLeftInPt)
+                        break;
+                    cPages -= cLeftInPt;
+                    uDst   += cLeftInPt << X86_PAGE_SHIFT;
+                }
+                else
+                {
+                    Bs3TestPrintf("warning: Bs3PagingAlias - bs3PagingGetLegacyPte failed: rc=%d\n", rc);
+                    return rc;
+                }
+            }
+
+            /*
+             * Make the changes.
+             */
+            cPages = cbHowMuch >> X86_PAGE_SHIFT;
+            uDst   = uDstSaved;
+            while (cPages > 0)
+            {
+                uint32_t cLeftInPt = X86_PG_PAE_ENTRIES - ((uDst >> X86_PT_PAE_SHIFT) & X86_PT_PAE_MASK);
+                pPtePae = bs3PagingGetPaePte(cr3, g_bBs3CurrentMode, uDst, false, &rc);
+                while (cLeftInPt > 0 && cPages > 0)
+                {
+                    pPtePae->u = uPhysToAlias | fPte;
+                    pPtePae++;
+                    uDst         += X86_PAGE_SIZE;
+                    uPhysToAlias += X86_PAGE_SIZE;
+                    cPages--;
+                    cLeftInPt--;
+                }
+            }
+        }
+
+        ASMReloadCR3();
+    }
+#if ARCH_BITS == 16
+    /*
+     * We can't do this stuff in v8086 mode, so switch to 16-bit prot mode and do it there.
+     */
+    else
+        return Bs3SwitchFromV86To16BitAndCallC((FPFNBS3FAR)Bs3PagingAlias_f16, sizeof(uint64_t)*3 + sizeof(uint32_t),
+                                               uDst, uPhysToAlias, cbHowMuch, fPte);
+#endif
+    return VINF_SUCCESS;
+}
+
+
+#undef Bs3PagingUnalias
+BS3_CMN_DEF(int, Bs3PagingUnalias,(uint64_t uDst, uint32_t cbHowMuch))
+{
+    return BS3_CMN_NM(Bs3PagingAlias)(uDst, uDst, cbHowMuch, X86_PTE_P | X86_PTE_RW | X86_PTE_US | X86_PTE_A | X86_PTE_D);
+}
+