Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

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

1 files changed, 182 insertions, 0 deletions

diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxConvertToRingX.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxConvertToRingX.c
new file mode 100644
index 00000000..f55c0c78
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxConvertToRingX.c
@@ -0,0 +1,182 @@
+/* $Id: bs3-cmn-RegCtxConvertToRingX.c $ */
+/** @file
+ * BS3Kit - Bs3RegCtxConvertToRingX
+ */
+
+/*
+ * Copyright (C) 2007-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "bs3kit-template-header.h"
+
+
+/**
+ * Transforms a real mode segment into a protected mode selector.
+ *
+ * @returns Protected mode selector.
+ * @param   uSeg            The real mode segment.
+ * @param   bRing           The target ring.
+ */
+static uint16_t bs3RegCtxConvertRealSegToRingX(uint16_t uSeg, uint8_t bRing)
+{
+    uint16_t uSel;
+    if (   uSeg == 0
+        || uSeg == BS3_SEL_R0_SS16)
+        uSel = BS3_SEL_R0_SS16 + ((uint16_t)bRing << BS3_SEL_RING_SHIFT);
+    else if (   uSeg == (BS3_ADDR_BS3TEXT16 >> 4)
+             || uSeg == BS3_SEL_R0_CS16)
+        uSel = BS3_SEL_R0_CS16 + ((uint16_t)bRing << BS3_SEL_RING_SHIFT);
+    else if (   uSeg == (BS3_ADDR_BS3DATA16 >> 4)
+             || uSeg == BS3_SEL_R0_DS16)
+        uSel = BS3_SEL_R0_DS16 + ((uint16_t)bRing << BS3_SEL_RING_SHIFT);
+    else if (uSeg == (BS3_ADDR_BS3SYSTEM16 >> 4))
+        uSel = BS3_SEL_SYSTEM16;
+    else if (!(uSeg & 0xfff))
+        uSel = (uSeg >> (12 - X86_SEL_SHIFT)) + BS3_SEL_TILED;
+    else if (uSeg == BS3_SEL_R0_DS16)
+        uSel = (uSeg >> (12 - X86_SEL_SHIFT)) + BS3_SEL_TILED;
+    else
+    {
+        Bs3Printf("uSeg=%#x\n", uSeg);
+        BS3_ASSERT(0);
+        return 0;
+    }
+    uSel |= bRing;
+    return uSel;
+}
+
+
+/**
+ * Transforms a protected mode selector to a different ring.
+ *
+ * @returns Adjusted protected mode selector.
+ * @param   uSel            The current selector value.
+ * @param   bRing           The target ring.
+ * @param   iReg            Register index.
+ */
+static uint16_t bs3RegCtxConvertProtSelToRingX(uint16_t uSel, uint8_t bRing, uint8_t iReg)
+{
+    if (   uSel > X86_SEL_RPL
+        && !(uSel & X86_SEL_LDT) )
+    {
+        if (uSel >= BS3_SEL_R0_FIRST && uSel < BS3_SEL_R0_FIRST + (5 << BS3_SEL_RING_SHIFT))
+        {
+            /* Convert BS3_SEL_R*_XXX to the target ring. */
+            uSel &= BS3_SEL_RING_SUB_MASK;
+            uSel |= bRing;
+            uSel += BS3_SEL_R0_FIRST;
+            uSel += (uint16_t)bRing << BS3_SEL_RING_SHIFT;
+        }
+        else
+        {
+            /* Convert TEXT16 and DATA16 to BS3_SEL_R*_XXX. */
+            uint16_t const uSelRaw = uSel & X86_SEL_MASK_OFF_RPL;
+            if (uSelRaw  == BS3_SEL_TEXT16)
+                uSel = (BS3_SEL_R0_CS16 | bRing) + ((uint16_t)bRing << BS3_SEL_RING_SHIFT);
+            else if (uSelRaw == BS3_SEL_DATA16)
+                uSel = (BS3_SEL_R0_DS16 | bRing) + ((uint16_t)bRing << BS3_SEL_RING_SHIFT);
+            /* CS and SS must have CPL == DPL.  So, convert to standard selectors as we're
+               usually here because Bs3SwitchToRing0 was called to get out of a test situation. */
+            else if (iReg == X86_SREG_CS || iReg == X86_SREG_SS)
+            {
+                if (   Bs3Gdt[uSel >> X86_SEL_SHIFT].Gen.u1Long
+                    && BS3_MODE_IS_64BIT_SYS(g_bBs3CurrentMode) )
+                    uSel = iReg == X86_SREG_CS ? BS3_SEL_R0_CS64 : BS3_SEL_R0_DS64;
+                else
+                {
+                    uint32_t uFlat   = Bs3SelFar32ToFlat32(0, uSel);
+                    bool     fDefBig = Bs3Gdt[uSel >> X86_SEL_SHIFT].Gen.u1DefBig;
+                    if (!fDefBig && uFlat == BS3_ADDR_BS3TEXT16 && iReg == X86_SREG_CS)
+                        uSel = BS3_SEL_R0_CS16;
+                    else if (!fDefBig && uFlat == 0 && iReg == X86_SREG_SS)
+                        uSel = BS3_SEL_R0_SS16;
+                    else if (fDefBig && uFlat == 0)
+                        uSel = iReg == X86_SREG_CS ? BS3_SEL_R0_CS32 : BS3_SEL_R0_SS32;
+                    else
+                    {
+                        Bs3Printf("uSel=%#x iReg=%d\n", uSel, iReg);
+                        BS3_ASSERT(0);
+                        return uSel;
+                    }
+                    uSel |= bRing;
+                    uSel += (uint16_t)bRing << BS3_SEL_RING_SHIFT;
+                }
+            }
+            /* Adjust the RPL on tiled and MMIO selectors. */
+            else if (   uSelRaw == BS3_SEL_VMMDEV_MMIO16
+                     || uSelRaw >= BS3_SEL_TILED)
+                uSel = uSelRaw | bRing;
+        }
+    }
+    return uSel;
+}
+
+
+/**
+ * Transforms a register context to a different ring.
+ *
+ * @param   pRegCtx     The register context.
+ * @param   bRing       The target ring (0..3).
+ *
+ * @note    Do _NOT_ call this for creating real mode or v8086 contexts, because
+ *          it will always output a protected mode context!
+ */
+#undef Bs3RegCtxConvertToRingX
+BS3_CMN_DEF(void, Bs3RegCtxConvertToRingX,(PBS3REGCTX pRegCtx, uint8_t bRing))
+{
+    if (   (pRegCtx->rflags.u32 & X86_EFL_VM)
+        || pRegCtx->bMode == BS3_MODE_RM)
+    {
+        pRegCtx->rflags.u32 &= ~X86_EFL_VM;
+        pRegCtx->bMode &= ~BS3_MODE_CODE_MASK;
+        pRegCtx->bMode |= BS3_MODE_CODE_16;
+        pRegCtx->cs = bs3RegCtxConvertRealSegToRingX(pRegCtx->cs, bRing);
+        pRegCtx->ss = bs3RegCtxConvertRealSegToRingX(pRegCtx->ss, bRing);
+        pRegCtx->ds = bs3RegCtxConvertRealSegToRingX(pRegCtx->ds, bRing);
+        pRegCtx->es = bs3RegCtxConvertRealSegToRingX(pRegCtx->es, bRing);
+        pRegCtx->fs = bs3RegCtxConvertRealSegToRingX(pRegCtx->fs, bRing);
+        pRegCtx->gs = bs3RegCtxConvertRealSegToRingX(pRegCtx->gs, bRing);
+    }
+    else
+    {
+        pRegCtx->cs = bs3RegCtxConvertProtSelToRingX(pRegCtx->cs, bRing, X86_SREG_CS);
+        pRegCtx->ss = bs3RegCtxConvertProtSelToRingX(pRegCtx->ss, bRing, X86_SREG_SS);
+        pRegCtx->ds = bs3RegCtxConvertProtSelToRingX(pRegCtx->ds, bRing, X86_SREG_DS);
+        pRegCtx->es = bs3RegCtxConvertProtSelToRingX(pRegCtx->es, bRing, X86_SREG_ES);
+        pRegCtx->fs = bs3RegCtxConvertProtSelToRingX(pRegCtx->fs, bRing, X86_SREG_FS);
+        pRegCtx->gs = bs3RegCtxConvertProtSelToRingX(pRegCtx->gs, bRing, X86_SREG_GS);
+    }
+    pRegCtx->bCpl = bRing;
+}
+