Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

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

1 files changed, 2832 insertions, 0 deletions

diff --git a/include/VBox/sup.h b/include/VBox/sup.h
new file mode 100644
index 00000000..258134fa
--- /dev/null
+++ b/include/VBox/sup.h
@@ -0,0 +1,2832 @@
+/** @file
+ * SUP - Support Library. (HDrv)
+ */
+
+/*
+ * Copyright (C) 2006-2022 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
+ */
+
+#ifndef VBOX_INCLUDED_sup_h
+#define VBOX_INCLUDED_sup_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <VBox/cdefs.h>
+#include <VBox/types.h>
+#include <iprt/assert.h>
+#include <iprt/stdarg.h>
+#include <iprt/cpuset.h>
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
+# include <iprt/asm-amd64-x86.h>
+#elif defined(RT_ARCH_ARM64) || defined(RT_ARCH_ARM64)
+# include <iprt/asm-arm.h>
+#endif
+
+RT_C_DECLS_BEGIN
+
+struct VTGOBJHDR;
+struct VTGPROBELOC;
+
+
+/** @defgroup   grp_sup     The Support Library API
+ * @{
+ */
+
+/**
+ * Physical page descriptor.
+ */
+#pragma pack(4) /* space is more important. */
+typedef struct SUPPAGE
+{
+    /** Physical memory address. */
+    RTHCPHYS        Phys;
+    /** Reserved entry for internal use by the caller. */
+    RTHCUINTPTR     uReserved;
+} SUPPAGE;
+#pragma pack()
+/** Pointer to a page descriptor. */
+typedef SUPPAGE *PSUPPAGE;
+/** Pointer to a const page descriptor. */
+typedef const SUPPAGE *PCSUPPAGE;
+
+/**
+ * The paging mode.
+ *
+ * @remarks Users are making assumptions about the order here!
+ */
+typedef enum SUPPAGINGMODE
+{
+    /** The usual invalid entry.
+     * This is returned by SUPR3GetPagingMode()  */
+    SUPPAGINGMODE_INVALID = 0,
+    /** Normal 32-bit paging, no global pages */
+    SUPPAGINGMODE_32_BIT,
+    /** Normal 32-bit paging with global pages. */
+    SUPPAGINGMODE_32_BIT_GLOBAL,
+    /** PAE mode, no global pages, no NX. */
+    SUPPAGINGMODE_PAE,
+    /** PAE mode with global pages. */
+    SUPPAGINGMODE_PAE_GLOBAL,
+    /** PAE mode with NX, no global pages. */
+    SUPPAGINGMODE_PAE_NX,
+    /** PAE mode with global pages and NX. */
+    SUPPAGINGMODE_PAE_GLOBAL_NX,
+    /** AMD64 mode, no global pages. */
+    SUPPAGINGMODE_AMD64,
+    /** AMD64 mode with global pages, no NX. */
+    SUPPAGINGMODE_AMD64_GLOBAL,
+    /** AMD64 mode with NX, no global pages. */
+    SUPPAGINGMODE_AMD64_NX,
+    /** AMD64 mode with global pages and NX. */
+    SUPPAGINGMODE_AMD64_GLOBAL_NX
+} SUPPAGINGMODE;
+
+
+/** @name Flags returned by SUPR0GetKernelFeatures().
+ * @{
+ */
+/** GDT is read-only. */
+#define SUPKERNELFEATURES_GDT_READ_ONLY       RT_BIT(0)
+/** SMAP is possibly enabled. */
+#define SUPKERNELFEATURES_SMAP                RT_BIT(1)
+/** GDT is read-only but the writable GDT can be fetched by SUPR0GetCurrentGdtRw(). */
+#define SUPKERNELFEATURES_GDT_NEED_WRITABLE   RT_BIT(2)
+/** @} */
+
+/**
+ * An VT-x control MSR.
+ * @sa  VMXCTLSMSR.
+ */
+typedef union SUPVMXCTLSMSR
+{
+    uint64_t            u;
+    struct
+    {
+        /** Bits set here _must_ be set in the corresponding VM-execution controls. */
+        uint32_t        allowed0;
+        /** Bits cleared here _must_ be cleared in the corresponding VM-execution controls. */
+        uint32_t        allowed1;
+    } n;
+} SUPVMXCTLSMSR;
+AssertCompileSize(SUPVMXCTLSMSR, sizeof(uint64_t));
+
+/**
+ * Hardware-virtualization MSRs.
+ */
+typedef struct SUPHWVIRTMSRS
+{
+    union
+    {
+        /** @sa VMXMSRS */
+        struct
+        {
+            uint64_t        u64FeatCtrl;
+            uint64_t        u64Basic;
+            /** Pin-based VM-execution controls. */
+            SUPVMXCTLSMSR   PinCtls;
+            /** Processor-based VM-execution controls. */
+            SUPVMXCTLSMSR   ProcCtls;
+            /** Secondary processor-based VM-execution controls. */
+            SUPVMXCTLSMSR   ProcCtls2;
+            /** VM-exit controls. */
+            SUPVMXCTLSMSR   ExitCtls;
+            /** VM-entry controls. */
+            SUPVMXCTLSMSR   EntryCtls;
+            /** True pin-based VM-execution controls. */
+            SUPVMXCTLSMSR   TruePinCtls;
+            /** True processor-based VM-execution controls. */
+            SUPVMXCTLSMSR   TrueProcCtls;
+            /** True VM-entry controls. */
+            SUPVMXCTLSMSR   TrueEntryCtls;
+            /** True VM-exit controls. */
+            SUPVMXCTLSMSR   TrueExitCtls;
+            uint64_t        u64Misc;
+            uint64_t        u64Cr0Fixed0;
+            uint64_t        u64Cr0Fixed1;
+            uint64_t        u64Cr4Fixed0;
+            uint64_t        u64Cr4Fixed1;
+            uint64_t        u64VmcsEnum;
+            uint64_t        u64VmFunc;
+            uint64_t        u64EptVpidCaps;
+            uint64_t        u64ProcCtls3;
+            uint64_t        u64ExitCtls2;
+            uint64_t        au64Reserved[7];
+        } vmx;
+        struct
+        {
+            uint64_t        u64MsrHwcr;
+            uint64_t        u64MsrSmmAddr;
+            uint64_t        u64MsrSmmMask;
+            uint64_t        u64Padding[25];
+        } svm;
+    } u;
+} SUPHWVIRTMSRS;
+AssertCompileSize(SUPHWVIRTMSRS, 224);
+/** Pointer to a hardware-virtualization MSRs struct. */
+typedef SUPHWVIRTMSRS *PSUPHWVIRTMSRS;
+/** Pointer to a hardware-virtualization MSRs struct. */
+typedef const SUPHWVIRTMSRS *PCSUPHWVIRTMSRS;
+
+
+/**
+ * Usermode probe context information.
+ */
+typedef struct SUPDRVTRACERUSRCTX
+{
+    /** The probe ID from the VTG location record.  */
+    uint32_t                idProbe;
+    /** 32 if X86, 64 if AMD64. */
+    uint8_t                 cBits;
+    /** Reserved padding. */
+    uint8_t                 abReserved[3];
+    /** Data which format is dictated by the cBits member. */
+    union
+    {
+        /** X86 context info. */
+        struct
+        {
+            uint32_t        uVtgProbeLoc;   /**< Location record address. */
+            uint32_t        aArgs[20];      /**< Raw arguments. */
+            uint32_t        eip;
+            uint32_t        eflags;
+            uint32_t        eax;
+            uint32_t        ecx;
+            uint32_t        edx;
+            uint32_t        ebx;
+            uint32_t        esp;
+            uint32_t        ebp;
+            uint32_t        esi;
+            uint32_t        edi;
+            uint16_t        cs;
+            uint16_t        ss;
+            uint16_t        ds;
+            uint16_t        es;
+            uint16_t        fs;
+            uint16_t        gs;
+        } X86;
+
+        /** AMD64 context info. */
+        struct
+        {
+            uint64_t        uVtgProbeLoc;   /**< Location record address. */
+            uint64_t        aArgs[10];      /**< Raw arguments. */
+            uint64_t        rip;
+            uint64_t        rflags;
+            uint64_t        rax;
+            uint64_t        rcx;
+            uint64_t        rdx;
+            uint64_t        rbx;
+            uint64_t        rsp;
+            uint64_t        rbp;
+            uint64_t        rsi;
+            uint64_t        rdi;
+            uint64_t        r8;
+            uint64_t        r9;
+            uint64_t        r10;
+            uint64_t        r11;
+            uint64_t        r12;
+            uint64_t        r13;
+            uint64_t        r14;
+            uint64_t        r15;
+        } Amd64;
+    } u;
+} SUPDRVTRACERUSRCTX;
+/** Pointer to the usermode probe context information. */
+typedef SUPDRVTRACERUSRCTX *PSUPDRVTRACERUSRCTX;
+/** Pointer to the const usermode probe context information. */
+typedef SUPDRVTRACERUSRCTX const *PCSUPDRVTRACERUSRCTX;
+
+/**
+ * The result of a modification operation (SUPMSRPROBEROP_MODIFY or
+ * SUPMSRPROBEROP_MODIFY_FASTER).
+ */
+typedef struct SUPMSRPROBERMODIFYRESULT
+{
+    /** The MSR value prior to the modifications.  Valid if fBeforeGp is false */
+    uint64_t        uBefore;
+    /** The value that was written.  Valid if fBeforeGp is false */
+    uint64_t        uWritten;
+    /** The MSR value after the modifications. Valid if AfterGp is false. */
+    uint64_t        uAfter;
+    /** Set if we GPed reading the MSR before the modification. */
+    bool            fBeforeGp;
+    /** Set if we GPed while trying to write the modified value.
+     * This is set when fBeforeGp is true. */
+    bool            fModifyGp;
+    /** Set if we GPed while trying to read the MSR after the modification.
+     * This is set when fBeforeGp is true. */
+    bool            fAfterGp;
+    /** Set if we GPed while trying to restore the MSR after the modification.
+     * This is set when fBeforeGp is true. */
+    bool            fRestoreGp;
+    /** Structure size alignment padding. */
+    bool            afReserved[4];
+} SUPMSRPROBERMODIFYRESULT, *PSUPMSRPROBERMODIFYRESULT;
+
+
+/**
+ * The CPU state.
+ */
+typedef enum SUPGIPCPUSTATE
+{
+    /** Invalid CPU state / unused CPU entry. */
+    SUPGIPCPUSTATE_INVALID = 0,
+    /** The CPU is not present. */
+    SUPGIPCPUSTATE_ABSENT,
+    /** The CPU is offline. */
+    SUPGIPCPUSTATE_OFFLINE,
+    /** The CPU is online. */
+    SUPGIPCPUSTATE_ONLINE,
+    /** Force 32-bit enum type. */
+    SUPGIPCPUSTATE_32_BIT_HACK = 0x7fffffff
+} SUPGIPCPUSTATE;
+
+/**
+ * Per CPU data.
+ */
+typedef struct SUPGIPCPU
+{
+    /** Update transaction number.
+     * This number is incremented at the start and end of each update. It follows
+     * thusly that odd numbers indicates update in progress, while even numbers
+     * indicate stable data. Use this to make sure that the data items you fetch
+     * are consistent. */
+    volatile uint32_t       u32TransactionId;
+    /** The interval in TSC ticks between two NanoTS updates.
+     * This is the average interval over the last 2, 4 or 8 updates + a little slack.
+     * The slack makes the time go a tiny tiny bit slower and extends the interval enough
+     * to avoid ending up with too many 1ns increments. */
+    volatile uint32_t       u32UpdateIntervalTSC;
+    /** Current nanosecond timestamp. */
+    volatile uint64_t       u64NanoTS;
+    /** The TSC at the time of u64NanoTS. */
+    volatile uint64_t       u64TSC;
+    /** Current CPU Frequency. */
+    volatile uint64_t       u64CpuHz;
+    /** The TSC delta with reference to the master TSC, subtract from RDTSC. */
+    volatile int64_t        i64TSCDelta;
+    /** Number of errors during updating.
+     * Typical errors are under/overflows. */
+    volatile uint32_t       cErrors;
+    /** Index of the head item in au32TSCHistory. */
+    volatile uint32_t       iTSCHistoryHead;
+    /** Array of recent TSC interval deltas.
+     * The most recent item is at index iTSCHistoryHead.
+     * This history is used to calculate u32UpdateIntervalTSC.
+     */
+    volatile uint32_t       au32TSCHistory[8];
+    /** The interval between the last two NanoTS updates. (experiment for now) */
+    volatile uint32_t       u32PrevUpdateIntervalNS;
+
+    /** Reserved for future per processor data. */
+    volatile uint32_t       u32Reserved;
+    /** The TSC value read while doing TSC delta measurements across CPUs. */
+    volatile uint64_t       u64TSCSample;
+    /** Reserved for future per processor data. */
+    volatile uint32_t       au32Reserved1[3];
+
+    /** The CPU state. */
+    SUPGIPCPUSTATE volatile enmState;
+    /** The host CPU ID of this CPU (the SUPGIPCPU is indexed by APIC ID). */
+    RTCPUID                 idCpu;
+    /** The CPU set index of this CPU. */
+    int16_t                 iCpuSet;
+    /** CPU group number (always zero, except on windows). */
+    uint16_t                iCpuGroup;
+    /** CPU group member number (same as iCpuSet, except on windows). */
+    uint16_t                iCpuGroupMember;
+    /** The APIC ID of this CPU. */
+    uint16_t                idApic;
+    /** @todo Add topology/NUMA info. */
+    uint32_t                iReservedForNumaNode;
+} SUPGIPCPU;
+AssertCompileSize(RTCPUID, 4);
+AssertCompileSize(SUPGIPCPU, 128);
+AssertCompileMemberAlignment(SUPGIPCPU, u64NanoTS, 8);
+AssertCompileMemberAlignment(SUPGIPCPU, u64TSC, 8);
+AssertCompileMemberAlignment(SUPGIPCPU, u64TSCSample, 8);
+
+/** Pointer to per cpu data.
+ * @remark there is no const version of this typedef, see g_pSUPGlobalInfoPage for details. */
+typedef SUPGIPCPU *PSUPGIPCPU;
+
+/**
+ * CPU group information.
+ * @remarks Windows only.
+ */
+typedef struct SUPGIPCPUGROUP
+{
+    /** Current number of CPUs in this group. */
+    uint16_t volatile       cMembers;
+    /** Maximum number of CPUs in the group. */
+    uint16_t                cMaxMembers;
+    /** The CPU set index of the members. This table has cMaxMembers entries.
+     * @note For various reasons, entries from cMembers and up to cMaxMembers are
+     *       may change as the host OS does set dynamic assignments during CPU
+     *       hotplugging. */
+    int16_t                 aiCpuSetIdxs[1];
+} SUPGIPCPUGROUP;
+/** Pointer to a GIP CPU group structure. */
+typedef SUPGIPCPUGROUP *PSUPGIPCPUGROUP;
+/** Pointer to a const GIP CPU group structure. */
+typedef SUPGIPCPUGROUP const *PCSUPGIPCPUGROUP;
+
+/**
+ * The rules concerning the applicability of SUPGIPCPU::i64TscDelta.
+ */
+typedef enum SUPGIPUSETSCDELTA
+{
+    /** Value for SUPGIPMODE_ASYNC_TSC. */
+    SUPGIPUSETSCDELTA_NOT_APPLICABLE = 0,
+    /** The OS specific part of SUPDrv (or the user) claims the TSC is as
+     * good as zero. */
+    SUPGIPUSETSCDELTA_ZERO_CLAIMED,
+    /** The differences in RDTSC output between the CPUs/cores/threads should
+     * be considered zero for all practical purposes. */
+    SUPGIPUSETSCDELTA_PRACTICALLY_ZERO,
+    /** The differences in RDTSC output between the CPUs/cores/threads are a few
+     * hundred ticks or less.  (Probably not worth calling ASMGetApicId two times
+     * just to apply deltas.) */
+    SUPGIPUSETSCDELTA_ROUGHLY_ZERO,
+    /** Significant differences in RDTSC output between the CPUs/cores/threads,
+     * deltas must be applied. */
+    SUPGIPUSETSCDELTA_NOT_ZERO,
+    /** End of valid values (exclusive). */
+    SUPGIPUSETSCDELTA_END,
+    /** Make sure the type is 32-bit sized. */
+    SUPGIPUSETSCDELTA_32BIT_HACK = 0x7fffffff
+} SUPGIPUSETSCDELTA;
+
+
+/** @name SUPGIPGETCPU_XXX - methods that aCPUs can be indexed.
+ *
+ * @note    Linux offers information via selector 0x78, and Windows via selector
+ *          0x53.  But since they both support RDTSCP as well, and because most
+ *          CPUs now have RDTSCP, we prefer it over LSL.  We can implement more
+ *          alternatives if it becomes necessary.
+ *
+ * @{
+ */
+/** Use ASMGetApicId (or equivalent) and translate the result via
+ *  aiCpuFromApicId. */
+#define SUPGIPGETCPU_APIC_ID                        RT_BIT_32(0)
+/** Use RDTSCP and translate the first RTCPUSET_MAX_CPUS of ECX via
+ * aiCpuFromCpuSetIdx.
+ *
+ * Linux stores the RTMpCpuId() value in ECX[11:0] and NUMA node number in
+ * ECX[12:31].  Solaris only stores RTMpCpuId() in ECX.  On both systems
+ * RTMpCpuId() == RTMpCpuIdToSetIndex(RTMpCpuId()).  RTCPUSET_MAX_CPUS is
+ * currently 64, 256 or 1024 in size, which lower than
+ * 4096, so there shouldn't be any range issues. */
+#define SUPGIPGETCPU_RDTSCP_MASK_MAX_SET_CPUS       RT_BIT_32(1)
+/** Subtract the max IDT size from IDTR.LIMIT, extract the
+ * first RTCPUSET_MAX_CPUS and translate it via aiCpuFromCpuSetIdx.
+ *
+ * Darwin stores the RTMpCpuId() (== RTMpCpuIdToSetIndex(RTMpCpuId()))
+ * value in the IDT limit.  The masking is a precaution against what linux
+ * does with RDTSCP. */
+#define SUPGIPGETCPU_IDTR_LIMIT_MASK_MAX_SET_CPUS   RT_BIT_32(2)
+/** Windows specific RDTSCP variant, where CH gives you the group and CL gives
+ * you the CPU number within that group.
+ *
+ * Use SUPGLOBALINFOPAGE::aidFirstCpuFromCpuGroup to get the group base CPU set
+ * index, then translate the sum of thru aiCpuFromCpuSetIdx to find the aCPUs
+ * entry.
+ *
+ * @note The group number is actually 16-bit wide (ECX[23:8]), but we simplify
+ *       it since we only support 256 CPUs/groups at the moment.
+ */
+#define SUPGIPGETCPU_RDTSCP_GROUP_IN_CH_NUMBER_IN_CL RT_BIT_32(3)
+/** Can use CPUID[0xb].EDX and translate the result via aiCpuFromApicId. */
+#define SUPGIPGETCPU_APIC_ID_EXT_0B                  RT_BIT_32(4)
+/** Can use CPUID[0x8000001e].EAX and translate the result via aiCpuFromApicId. */
+#define SUPGIPGETCPU_APIC_ID_EXT_8000001E            RT_BIT_32(5)
+/** @} */
+
+/** @def SUPGIP_MAX_CPU_GROUPS
+ * Maximum number of CPU groups.  */
+#if RTCPUSET_MAX_CPUS >= 256
+# define SUPGIP_MAX_CPU_GROUPS 256
+#else
+# define SUPGIP_MAX_CPU_GROUPS RTCPUSET_MAX_CPUS
+#endif
+
+/**
+ * Global Information Page.
+ *
+ * This page contains useful information and can be mapped into any
+ * process or VM. It can be accessed thru the g_pSUPGlobalInfoPage
+ * pointer when a session is open.
+ */
+typedef struct SUPGLOBALINFOPAGE
+{
+    /** Magic (SUPGLOBALINFOPAGE_MAGIC). */
+    uint32_t            u32Magic;
+    /** The GIP version. */
+    uint32_t            u32Version;
+
+    /** The GIP update mode, see SUPGIPMODE. */
+    uint32_t            u32Mode;
+    /** The number of entries in the CPU table.
+     * (This can work as RTMpGetArraySize().)  */
+    uint16_t            cCpus;
+    /** The size of the GIP in pages. */
+    uint16_t            cPages;
+    /** The update frequency of the of the NanoTS. */
+    volatile uint32_t   u32UpdateHz;
+    /** The update interval in nanoseconds. (10^9 / u32UpdateHz) */
+    volatile uint32_t   u32UpdateIntervalNS;
+    /** The timestamp of the last time we update the update frequency. */
+    volatile uint64_t   u64NanoTSLastUpdateHz;
+    /** The TSC frequency of the system. */
+    uint64_t            u64CpuHz;
+    /** The number of CPUs that are online. */
+    volatile uint16_t   cOnlineCpus;
+    /** The number of CPUs present in the system. */
+    volatile uint16_t   cPresentCpus;
+    /** The highest number of CPUs possible. */
+    uint16_t            cPossibleCpus;
+    /** The highest number of CPU groups possible. */
+    uint16_t            cPossibleCpuGroups;
+    /** The max CPU ID (RTMpGetMaxCpuId). */
+    RTCPUID             idCpuMax;
+    /** The applicability of SUPGIPCPU::i64TscDelta. */
+    SUPGIPUSETSCDELTA   enmUseTscDelta;
+    /** Mask of SUPGIPGETCPU_XXX values that indicates different ways that aCPU
+     * can be accessed from ring-3 and raw-mode context. */
+    uint32_t            fGetGipCpu;
+    /** GIP flags, see SUPGIP_FLAGS_XXX. */
+    volatile uint32_t   fFlags;
+    /** The set of online CPUs. */
+    RTCPUSET            OnlineCpuSet;
+#if RTCPUSET_MAX_CPUS < 1024
+    uint64_t            abOnlineCpuSetPadding[(1024 - RTCPUSET_MAX_CPUS) / 64];
+#endif
+    /** The set of present CPUs. */
+    RTCPUSET            PresentCpuSet;
+#if RTCPUSET_MAX_CPUS < 1024
+    uint64_t            abPresentCpuSetPadding[(1024 - RTCPUSET_MAX_CPUS) / 64];
+#endif
+    /** The set of possible CPUs. */
+    RTCPUSET            PossibleCpuSet;
+#if RTCPUSET_MAX_CPUS < 1024
+    uint64_t            abPossibleCpuSetPadding[(1024 - RTCPUSET_MAX_CPUS) / 64];
+#endif
+
+    /** Padding / reserved space for future data. */
+    uint32_t            au32Padding1[48];
+
+    /** Table indexed by the CPU APIC ID to get the CPU table index. */
+    uint16_t            aiCpuFromApicId[4096];
+    /** CPU set index to CPU table index. */
+    uint16_t            aiCpuFromCpuSetIdx[1024];
+    /** Table indexed by CPU group to containing offsets to SUPGIPCPUGROUP
+     * structures, invalid entries are set to UINT32_MAX.  The offsets are relative
+     * to the start of this structure.
+     * @note Windows only. The other hosts sets all entries to UINT32_MAX! */
+    uint32_t            aoffCpuGroup[SUPGIP_MAX_CPU_GROUPS];
+
+    /** Array of per-cpu data.
+     * This is index by ApicId via the aiCpuFromApicId table.
+     *
+     * The clock and frequency information is updated for all CPUs if @c u32Mode
+     * is SUPGIPMODE_ASYNC_TSC. If @c u32Mode is SUPGIPMODE_SYNC_TSC only the first
+     * entry is updated. If @c u32Mode is SUPGIPMODE_SYNC_TSC the TSC frequency in
+     * @c u64CpuHz is copied to all CPUs. */
+    SUPGIPCPU           aCPUs[1];
+} SUPGLOBALINFOPAGE;
+AssertCompileMemberAlignment(SUPGLOBALINFOPAGE, u64NanoTSLastUpdateHz, 8);
+AssertCompileMemberAlignment(SUPGLOBALINFOPAGE, OnlineCpuSet, 64);
+AssertCompileMemberAlignment(SUPGLOBALINFOPAGE, PresentCpuSet, 64);
+AssertCompileMemberAlignment(SUPGLOBALINFOPAGE, PossibleCpuSet, 64);
+#if defined(RT_ARCH_SPARC) || defined(RT_ARCH_SPARC64) /* ?? needed ?? */
+AssertCompileMemberAlignment(SUPGLOBALINFOPAGE, aCPUs, 32);
+#else
+AssertCompileMemberAlignment(SUPGLOBALINFOPAGE, aCPUs, 128);
+#endif
+
+/** Pointer to the global info page.
+ * @remark there is no const version of this typedef, see g_pSUPGlobalInfoPage for details. */
+typedef SUPGLOBALINFOPAGE *PSUPGLOBALINFOPAGE;
+
+
+/** The value of the SUPGLOBALINFOPAGE::u32Magic field. (Soryo Fuyumi) */
+#define SUPGLOBALINFOPAGE_MAGIC     0x19590106
+/** The GIP version.
+ * Upper 16 bits is the major version. Major version is only changed with
+ * incompatible changes in the GIP. */
+#define SUPGLOBALINFOPAGE_VERSION   0x000a0000
+
+/**
+ * SUPGLOBALINFOPAGE::u32Mode values.
+ */
+typedef enum SUPGIPMODE
+{
+    /** The usual invalid null entry. */
+    SUPGIPMODE_INVALID = 0,
+    /** The TSC of the cores and cpus in the system is in sync. */
+    SUPGIPMODE_SYNC_TSC,
+    /** Each core has it's own TSC. */
+    SUPGIPMODE_ASYNC_TSC,
+    /** The TSC of the cores are non-stop and have a constant frequency. */
+    SUPGIPMODE_INVARIANT_TSC,
+    /** End of valid GIP mode values (exclusive). */
+    SUPGIPMODE_END,
+    /** The usual 32-bit hack. */
+    SUPGIPMODE_32BIT_HACK = 0x7fffffff
+} SUPGIPMODE;
+
+/** Pointer to the Global Information Page.
+ *
+ * This pointer is valid as long as SUPLib has a open session. Anyone using
+ * the page must treat this pointer as highly volatile and not trust it beyond
+ * one transaction.
+ *
+ * @remark  The GIP page is read-only to everyone but the support driver and
+ *          is actually mapped read only everywhere but in ring-0. However
+ *          it is not marked 'const' as this might confuse compilers into
+ *          thinking that values doesn't change even if members are marked
+ *          as volatile. Thus, there is no PCSUPGLOBALINFOPAGE type.
+ */
+#if defined(IN_SUP_R3) || defined(IN_SUP_R0)
+extern DECLEXPORT(PSUPGLOBALINFOPAGE)   g_pSUPGlobalInfoPage;
+
+#elif !defined(IN_RING0) || defined(RT_OS_WINDOWS) || defined(RT_OS_SOLARIS) || defined(VBOX_WITH_KMOD_WRAPPED_R0_MODS)
+extern DECLIMPORT(PSUPGLOBALINFOPAGE)   g_pSUPGlobalInfoPage;
+
+#else /* IN_RING0 && !RT_OS_WINDOWS */
+# if !defined(__GNUC__) || defined(RT_OS_DARWIN) || !defined(RT_ARCH_AMD64)
+#  define g_pSUPGlobalInfoPage          (&g_SUPGlobalInfoPage)
+# else
+#  define g_pSUPGlobalInfoPage          (SUPGetGIPHlp())
+/** Workaround for ELF+GCC problem on 64-bit hosts.
+ * (GCC emits a mov with a R_X86_64_32 reloc, we need R_X86_64_64.) */
+DECLINLINE(PSUPGLOBALINFOPAGE) SUPGetGIPHlp(void)
+{
+    PSUPGLOBALINFOPAGE pGIP;
+    __asm__ __volatile__ ("movabs $g_SUPGlobalInfoPage,%0\n\t"
+                          : "=a" (pGIP));
+    return pGIP;
+}
+# endif
+/** The GIP.
+ * We save a level of indirection by exporting the GIP instead of a variable
+ * pointing to it. */
+extern DECLIMPORT(SUPGLOBALINFOPAGE)    g_SUPGlobalInfoPage;
+#endif
+
+/**
+ * Gets the GIP pointer.
+ *
+ * @returns Pointer to the GIP or NULL.
+ */
+SUPDECL(PSUPGLOBALINFOPAGE)             SUPGetGIP(void);
+
+/** @name SUPGIP_FLAGS_XXX - SUPR3GipSetFlags flags.
+ * @{ */
+/** Enable GIP test mode. */
+#define SUPGIP_FLAGS_TESTING_ENABLE          RT_BIT_32(0)
+/** Valid mask of flags that can be set through the ioctl. */
+#define SUPGIP_FLAGS_VALID_MASK              RT_BIT_32(0)
+/** GIP test mode needs to be checked (e.g. when enabled or being disabled). */
+#define SUPGIP_FLAGS_TESTING                 RT_BIT_32(24)
+/** Prepare to start GIP test mode. */
+#define SUPGIP_FLAGS_TESTING_START           RT_BIT_32(25)
+/** Prepare to stop GIP test mode. */
+#define SUPGIP_FLAGS_TESTING_STOP            RT_BIT_32(26)
+/** @} */
+
+/** @internal  */
+SUPDECL(PSUPGIPCPU) SUPGetGipCpuPtrForAsyncMode(PSUPGLOBALINFOPAGE pGip);
+SUPDECL(uint64_t) SUPGetCpuHzFromGipForAsyncMode(PSUPGLOBALINFOPAGE pGip);
+SUPDECL(bool)     SUPIsTscFreqCompatible(uint64_t uCpuHz, uint64_t *puGipCpuHz, bool fRelax);
+SUPDECL(bool)     SUPIsTscFreqCompatibleEx(uint64_t uBaseCpuHz, uint64_t uCpuHz, bool fRelax);
+
+
+/**
+ * Gets CPU entry of the calling CPU.
+ *
+ * @returns Pointer to the CPU entry on success, NULL on failure.
+ * @param   pGip        The GIP pointer.
+ */
+DECLINLINE(PSUPGIPCPU) SUPGetGipCpuPtr(PSUPGLOBALINFOPAGE pGip)
+{
+    if (RT_LIKELY(   pGip
+                  && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC))
+    {
+        switch (pGip->u32Mode)
+        {
+            case SUPGIPMODE_INVARIANT_TSC:
+            case SUPGIPMODE_SYNC_TSC:
+                return &pGip->aCPUs[0];
+            case SUPGIPMODE_ASYNC_TSC:
+                return SUPGetGipCpuPtrForAsyncMode(pGip);
+            default: break; /* shut up gcc */
+        }
+    }
+    AssertFailed();
+    return NULL;
+}
+
+/**
+ * Gets the TSC frequency of the calling CPU.
+ *
+ * @returns TSC frequency, UINT64_MAX on failure (asserted).
+ * @param   pGip        The GIP pointer.
+ */
+DECLINLINE(uint64_t) SUPGetCpuHzFromGip(PSUPGLOBALINFOPAGE pGip)
+{
+    if (RT_LIKELY(   pGip
+                  && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC))
+    {
+        switch (pGip->u32Mode)
+        {
+            case SUPGIPMODE_INVARIANT_TSC:
+            case SUPGIPMODE_SYNC_TSC:
+                return pGip->aCPUs[0].u64CpuHz;
+            case SUPGIPMODE_ASYNC_TSC:
+                return SUPGetCpuHzFromGipForAsyncMode(pGip);
+            default: break; /* shut up gcc */
+        }
+    }
+    AssertFailed();
+    return UINT64_MAX;
+}
+
+
+/**
+ * Gets the TSC frequency of the specified CPU.
+ *
+ * @returns TSC frequency, UINT64_MAX on failure (asserted).
+ * @param   pGip        The GIP pointer.
+ * @param   iCpuSet     The CPU set index of the CPU in question.
+ */
+DECLINLINE(uint64_t) SUPGetCpuHzFromGipBySetIndex(PSUPGLOBALINFOPAGE pGip, uint32_t iCpuSet)
+{
+    if (RT_LIKELY(   pGip
+                  && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC))
+    {
+        switch (pGip->u32Mode)
+        {
+            case SUPGIPMODE_INVARIANT_TSC:
+            case SUPGIPMODE_SYNC_TSC:
+                return pGip->aCPUs[0].u64CpuHz;
+            case SUPGIPMODE_ASYNC_TSC:
+                if (RT_LIKELY(iCpuSet < RT_ELEMENTS(pGip->aiCpuFromCpuSetIdx)))
+                {
+                    uint16_t iCpu = pGip->aiCpuFromCpuSetIdx[iCpuSet];
+                    if (RT_LIKELY(iCpu < pGip->cCpus))
+                        return pGip->aCPUs[iCpu].u64CpuHz;
+                }
+                break;
+            default: break; /* shut up gcc */
+        }
+    }
+    AssertFailed();
+    return UINT64_MAX;
+}
+
+
+/**
+ * Gets the pointer to the per CPU data for a CPU given by its set index.
+ *
+ * @returns Pointer to the corresponding per CPU structure, or NULL if invalid.
+ * @param   pGip        The GIP pointer.
+ * @param   iCpuSet     The CPU set index of the CPU which we want.
+ */
+DECLINLINE(PSUPGIPCPU) SUPGetGipCpuBySetIndex(PSUPGLOBALINFOPAGE pGip, uint32_t iCpuSet)
+{
+    if (RT_LIKELY(   pGip
+                  && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC))
+    {
+        if (RT_LIKELY(iCpuSet < RT_ELEMENTS(pGip->aiCpuFromCpuSetIdx)))
+        {
+            uint16_t iCpu = pGip->aiCpuFromCpuSetIdx[iCpuSet];
+            if (RT_LIKELY(iCpu < pGip->cCpus))
+                return &pGip->aCPUs[iCpu];
+        }
+    }
+    return NULL;
+}
+
+
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) || defined(RT_ARCH_ARM64) ||defined(RT_ARCH_ARM32)
+
+/** @internal */
+SUPDECL(uint64_t) SUPReadTscWithDelta(PSUPGLOBALINFOPAGE pGip);
+
+/**
+ * Read the host TSC value and applies the TSC delta if appropriate.
+ *
+ * @returns the TSC value.
+ * @remarks Requires GIP to be initialized and valid.
+ */
+DECLINLINE(uint64_t) SUPReadTsc(void)
+{
+# if defined(RT_ARCH_ARM64) || defined(RT_ARCH_ARM32)  /** @todo portme: ring-0 arm. */
+    return ASMReadTSC();
+# else
+    PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
+    if (!pGip || pGip->enmUseTscDelta <= SUPGIPUSETSCDELTA_ROUGHLY_ZERO)
+        return ASMReadTSC();
+    return SUPReadTscWithDelta(pGip);
+# endif
+}
+
+#endif /* X86 || AMD64 || ARM */
+
+/** @internal */
+SUPDECL(int64_t) SUPGetTscDeltaSlow(PSUPGLOBALINFOPAGE pGip);
+
+/**
+ * Gets the TSC delta for the current CPU.
+ *
+ * @returns The TSC delta value (will not return the special INT64_MAX value).
+ * @param   pGip    The GIP, NULL is okay in ring-3.
+ * @remarks Requires GIP to be initialized and valid if pGip isn't NULL.
+ */
+DECLINLINE(int64_t) SUPGetTscDelta(PSUPGLOBALINFOPAGE pGip)
+{
+#ifdef IN_RING3
+    if (!pGip || pGip->enmUseTscDelta <= SUPGIPUSETSCDELTA_ROUGHLY_ZERO)
+#else
+    if (pGip->enmUseTscDelta <= SUPGIPUSETSCDELTA_ROUGHLY_ZERO)
+#endif
+        return 0;
+    return SUPGetTscDeltaSlow(pGip);
+}
+
+
+/**
+ * Gets the TSC delta for a given CPU.
+ *
+ * @returns The TSC delta value (will not return the special INT64_MAX value).
+ * @param   iCpuSet         The CPU set index of the CPU which TSC delta we want.
+ * @remarks Requires GIP to be initialized and valid.
+ */
+DECLINLINE(int64_t) SUPGetTscDeltaByCpuSetIndex(uint32_t iCpuSet)
+{
+    PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
+    if (pGip->enmUseTscDelta <= SUPGIPUSETSCDELTA_ROUGHLY_ZERO)
+        return 0;
+    if (RT_LIKELY(iCpuSet < RT_ELEMENTS(pGip->aiCpuFromCpuSetIdx)))
+    {
+        uint16_t iCpu = pGip->aiCpuFromCpuSetIdx[iCpuSet];
+        if (RT_LIKELY(iCpu < pGip->cCpus))
+        {
+            int64_t iTscDelta = pGip->aCPUs[iCpu].i64TSCDelta;
+            if (iTscDelta != INT64_MAX)
+                return iTscDelta;
+        }
+    }
+    AssertFailed();
+    return 0;
+}
+
+
+/**
+ * Checks if the TSC delta is available for a given CPU (if TSC-deltas are
+ * relevant).
+ *
+ * @returns true if it's okay to read the TSC, false otherwise.
+ *
+ * @param   iCpuSet   The CPU set index of the CPU which TSC delta we check.
+ * @remarks Requires GIP to be initialized and valid.
+ */
+DECLINLINE(bool) SUPIsTscDeltaAvailableForCpuSetIndex(uint32_t iCpuSet)
+{
+    PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
+    if (pGip->enmUseTscDelta <= SUPGIPUSETSCDELTA_ROUGHLY_ZERO)
+        return true;
+    if (RT_LIKELY(iCpuSet < RT_ELEMENTS(pGip->aiCpuFromCpuSetIdx)))
+    {
+        uint16_t iCpu = pGip->aiCpuFromCpuSetIdx[iCpuSet];
+        if (RT_LIKELY(iCpu < pGip->cCpus))
+        {
+            int64_t iTscDelta = pGip->aCPUs[iCpu].i64TSCDelta;
+            if (iTscDelta != INT64_MAX)
+                return true;
+        }
+    }
+    return false;
+}
+
+
+/**
+ * Gets the descriptive GIP mode name.
+ *
+ * @returns The name.
+ * @param   pGip      Pointer to the GIP.
+ */
+DECLINLINE(const char *) SUPGetGIPModeName(PSUPGLOBALINFOPAGE pGip)
+{
+    AssertReturn(pGip, NULL);
+    switch (pGip->u32Mode)
+    {
+        case SUPGIPMODE_INVARIANT_TSC:  return "Invariant";
+        case SUPGIPMODE_SYNC_TSC:       return "Synchronous";
+        case SUPGIPMODE_ASYNC_TSC:      return "Asynchronous";
+        case SUPGIPMODE_INVALID:        return "Invalid";
+        default:                        return "???";
+    }
+}
+
+
+/**
+ * Gets the descriptive TSC-delta enum name.
+ *
+ * @returns The name.
+ * @param   pGip      Pointer to the GIP.
+ */
+DECLINLINE(const char *) SUPGetGIPTscDeltaModeName(PSUPGLOBALINFOPAGE pGip)
+{
+    AssertReturn(pGip, NULL);
+    switch (pGip->enmUseTscDelta)
+    {
+        case SUPGIPUSETSCDELTA_NOT_APPLICABLE:   return "Not Applicable";
+        case SUPGIPUSETSCDELTA_ZERO_CLAIMED:     return "Zero Claimed";
+        case SUPGIPUSETSCDELTA_PRACTICALLY_ZERO: return "Practically Zero";
+        case SUPGIPUSETSCDELTA_ROUGHLY_ZERO:     return "Roughly Zero";
+        case SUPGIPUSETSCDELTA_NOT_ZERO:         return "Not Zero";
+        default:                                 return "???";
+    }
+}
+
+
+/**
+ * Request for generic VMMR0Entry calls.
+ */
+typedef struct SUPVMMR0REQHDR
+{
+    /** The magic. (SUPVMMR0REQHDR_MAGIC) */
+    uint32_t    u32Magic;
+    /** The size of the request. */
+    uint32_t    cbReq;
+} SUPVMMR0REQHDR;
+/** Pointer to a ring-0 request header. */
+typedef SUPVMMR0REQHDR *PSUPVMMR0REQHDR;
+/** the SUPVMMR0REQHDR::u32Magic value (Ethan Iverson - The Bad Plus). */
+#define SUPVMMR0REQHDR_MAGIC        UINT32_C(0x19730211)
+
+
+/** For the fast ioctl path.
+ * @{
+ */
+/** @see VMMR0_DO_HM_RUN. */
+#define SUP_VMMR0_DO_HM_RUN     0
+/** @see VMMR0_DO_NEM_RUN */
+#define SUP_VMMR0_DO_NEM_RUN    1
+/** @see VMMR0_DO_NOP */
+#define SUP_VMMR0_DO_NOP        2
+/** @} */
+
+/** SUPR3QueryVTCaps capability flags.
+ * @{
+ */
+/** AMD-V support. */
+#define SUPVTCAPS_AMD_V                     RT_BIT(0)
+/** VT-x support. */
+#define SUPVTCAPS_VT_X                      RT_BIT(1)
+/** Nested paging is supported. */
+#define SUPVTCAPS_NESTED_PAGING             RT_BIT(2)
+/** VT-x: Unrestricted guest execution is supported. */
+#define SUPVTCAPS_VTX_UNRESTRICTED_GUEST    RT_BIT(3)
+/** VT-x: VMCS shadowing is supported. */
+#define SUPVTCAPS_VTX_VMCS_SHADOWING        RT_BIT(4)
+/** AMD-V: Virtualized VMSAVE/VMLOAD is supported. */
+#define SUPVTCAPS_AMDV_VIRT_VMSAVE_VMLOAD   RT_BIT(5)
+/** @} */
+
+/**
+ * Request for generic FNSUPR0SERVICEREQHANDLER calls.
+ */
+typedef struct SUPR0SERVICEREQHDR
+{
+    /** The magic. (SUPR0SERVICEREQHDR_MAGIC) */
+    uint32_t    u32Magic;
+    /** The size of the request. */
+    uint32_t    cbReq;
+} SUPR0SERVICEREQHDR;
+/** Pointer to a ring-0 service request header. */
+typedef SUPR0SERVICEREQHDR *PSUPR0SERVICEREQHDR;
+/** the SUPVMMR0REQHDR::u32Magic value (Esbjoern Svensson - E.S.P.).  */
+#define SUPR0SERVICEREQHDR_MAGIC    UINT32_C(0x19640416)
+
+
+/**
+ * Creates a single release event semaphore.
+ *
+ * @returns VBox status code.
+ * @param   pSession        The session handle of the caller.
+ * @param   phEvent         Where to return the handle to the event semaphore.
+ */
+SUPDECL(int) SUPSemEventCreate(PSUPDRVSESSION pSession, PSUPSEMEVENT phEvent);
+
+/**
+ * Closes a single release event semaphore handle.
+ *
+ * @returns VBox status code.
+ * @retval  VINF_OBJECT_DESTROYED if the semaphore was destroyed.
+ * @retval  VINF_SUCCESS if the handle was successfully closed but the semaphore
+ *          object remained alive because of other references.
+ *
+ * @param   pSession            The session handle of the caller.
+ * @param   hEvent              The handle. Nil is quietly ignored.
+ */
+SUPDECL(int) SUPSemEventClose(PSUPDRVSESSION pSession, SUPSEMEVENT hEvent);
+
+/**
+ * Signals a single release event semaphore.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEvent              The semaphore handle.
+ */
+SUPDECL(int) SUPSemEventSignal(PSUPDRVSESSION pSession, SUPSEMEVENT hEvent);
+
+#ifdef IN_RING0
+/**
+ * Waits on a single release event semaphore, not interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEvent              The semaphore handle.
+ * @param   cMillies            The number of milliseconds to wait.
+ * @remarks Not available in ring-3.
+ */
+SUPDECL(int) SUPSemEventWait(PSUPDRVSESSION pSession, SUPSEMEVENT hEvent, uint32_t cMillies);
+#endif
+
+/**
+ * Waits on a single release event semaphore, interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEvent              The semaphore handle.
+ * @param   cMillies            The number of milliseconds to wait.
+ */
+SUPDECL(int) SUPSemEventWaitNoResume(PSUPDRVSESSION pSession, SUPSEMEVENT hEvent, uint32_t cMillies);
+
+/**
+ * Waits on a single release event semaphore, interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEvent              The semaphore handle.
+ * @param   uNsTimeout          The deadline given on the RTTimeNanoTS() clock.
+ */
+SUPDECL(int) SUPSemEventWaitNsAbsIntr(PSUPDRVSESSION pSession, SUPSEMEVENT hEvent, uint64_t uNsTimeout);
+
+/**
+ * Waits on a single release event semaphore, interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEvent              The semaphore handle.
+ * @param   cNsTimeout          The number of nanoseconds to wait.
+ */
+SUPDECL(int) SUPSemEventWaitNsRelIntr(PSUPDRVSESSION pSession, SUPSEMEVENT hEvent, uint64_t cNsTimeout);
+
+/**
+ * Gets the best timeout resolution that SUPSemEventWaitNsAbsIntr and
+ * SUPSemEventWaitNsAbsIntr can do.
+ *
+ * @returns The resolution in nanoseconds.
+ * @param   pSession            The session handle of the caller.
+ */
+SUPDECL(uint32_t) SUPSemEventGetResolution(PSUPDRVSESSION pSession);
+
+
+/**
+ * Creates a multiple release event semaphore.
+ *
+ * @returns VBox status code.
+ * @param   pSession        The session handle of the caller.
+ * @param   phEventMulti    Where to return the handle to the event semaphore.
+ */
+SUPDECL(int) SUPSemEventMultiCreate(PSUPDRVSESSION pSession, PSUPSEMEVENTMULTI phEventMulti);
+
+/**
+ * Closes a multiple release event semaphore handle.
+ *
+ * @returns VBox status code.
+ * @retval  VINF_OBJECT_DESTROYED if the semaphore was destroyed.
+ * @retval  VINF_SUCCESS if the handle was successfully closed but the semaphore
+ *          object remained alive because of other references.
+ *
+ * @param   pSession            The session handle of the caller.
+ * @param   hEventMulti         The handle. Nil is quietly ignored.
+ */
+SUPDECL(int) SUPSemEventMultiClose(PSUPDRVSESSION pSession, SUPSEMEVENTMULTI hEventMulti);
+
+/**
+ * Signals a multiple release event semaphore.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEventMulti         The semaphore handle.
+ */
+SUPDECL(int) SUPSemEventMultiSignal(PSUPDRVSESSION pSession, SUPSEMEVENTMULTI hEventMulti);
+
+/**
+ * Resets a multiple release event semaphore.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEventMulti         The semaphore handle.
+ */
+SUPDECL(int) SUPSemEventMultiReset(PSUPDRVSESSION pSession, SUPSEMEVENTMULTI hEventMulti);
+
+#ifdef IN_RING0
+/**
+ * Waits on a multiple release event semaphore, not interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEventMulti         The semaphore handle.
+ * @param   cMillies            The number of milliseconds to wait.
+ * @remarks Not available in ring-3.
+ */
+SUPDECL(int) SUPSemEventMultiWait(PSUPDRVSESSION pSession, SUPSEMEVENTMULTI hEventMulti, uint32_t cMillies);
+#endif
+
+/**
+ * Waits on a multiple release event semaphore, interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEventMulti         The semaphore handle.
+ * @param   cMillies            The number of milliseconds to wait.
+ */
+SUPDECL(int) SUPSemEventMultiWaitNoResume(PSUPDRVSESSION pSession, SUPSEMEVENTMULTI hEventMulti, uint32_t cMillies);
+
+/**
+ * Waits on a multiple release event semaphore, interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEventMulti         The semaphore handle.
+ * @param   uNsTimeout          The deadline given on the RTTimeNanoTS() clock.
+ */
+SUPDECL(int) SUPSemEventMultiWaitNsAbsIntr(PSUPDRVSESSION pSession, SUPSEMEVENTMULTI hEventMulti, uint64_t uNsTimeout);
+
+/**
+ * Waits on a multiple release event semaphore, interruptible.
+ *
+ * @returns VBox status code.
+ * @param   pSession            The session handle of the caller.
+ * @param   hEventMulti         The semaphore handle.
+ * @param   cNsTimeout          The number of nanoseconds to wait.
+ */
+SUPDECL(int) SUPSemEventMultiWaitNsRelIntr(PSUPDRVSESSION pSession, SUPSEMEVENTMULTI hEventMulti, uint64_t cNsTimeout);
+
+/**
+ * Gets the best timeout resolution that SUPSemEventMultiWaitNsAbsIntr and
+ * SUPSemEventMultiWaitNsRelIntr can do.
+ *
+ * @returns The resolution in nanoseconds.
+ * @param   pSession            The session handle of the caller.
+ */
+SUPDECL(uint32_t) SUPSemEventMultiGetResolution(PSUPDRVSESSION pSession);
+
+
+#ifdef IN_RING3
+
+/** @defgroup   grp_sup_r3     SUP Host Context Ring-3 API
+ * @{
+ */
+
+/**
+ * Installs the support library.
+ *
+ * @returns VBox status code.
+ */
+SUPR3DECL(int) SUPR3Install(void);
+
+/**
+ * Uninstalls the support library.
+ *
+ * @returns VBox status code.
+ */
+SUPR3DECL(int) SUPR3Uninstall(void);
+
+/**
+ * Trusted main entry point.
+ *
+ * This is exported as "TrustedMain" by the dynamic libraries which contains the
+ * "real" application binary for which the hardened stub is built.  The entry
+ * point is invoked upon successful initialization of the support library and
+ * runtime.
+ *
+ * @returns main kind of exit code.
+ * @param   argc            The argument count.
+ * @param   argv            The argument vector.
+ * @param   envp            The environment vector.
+ */
+typedef DECLCALLBACKTYPE(int, FNSUPTRUSTEDMAIN,(int argc, char **argv, char **envp));
+/** Pointer to FNSUPTRUSTEDMAIN(). */
+typedef FNSUPTRUSTEDMAIN *PFNSUPTRUSTEDMAIN;
+
+/** Which operation failed. */
+typedef enum SUPINITOP
+{
+    /** Invalid. */
+    kSupInitOp_Invalid = 0,
+    /** Installation integrity error. */
+    kSupInitOp_Integrity,
+    /** Setuid related. */
+    kSupInitOp_RootCheck,
+    /** Driver related. */
+    kSupInitOp_Driver,
+    /** IPRT init related. */
+    kSupInitOp_IPRT,
+    /** Miscellaneous. */
+    kSupInitOp_Misc,
+    /** Place holder. */
+    kSupInitOp_End
+} SUPINITOP;
+
+/**
+ * Trusted error entry point, optional.
+ *
+ * This is exported as "TrustedError" by the dynamic libraries which contains
+ * the "real" application binary for which the hardened stub is built. The
+ * hardened main() must specify SUPSECMAIN_FLAGS_TRUSTED_ERROR when calling
+ * SUPR3HardenedMain.
+ *
+ * @param   pszWhere        Where the error occurred (function name).
+ * @param   enmWhat         Which operation went wrong.
+ * @param   rc              The status code.
+ * @param   pszMsgFmt       Error message format string.
+ * @param   va              The message format arguments.
+ */
+typedef DECLCALLBACKTYPE(void, FNSUPTRUSTEDERROR,(const char *pszWhere, SUPINITOP enmWhat, int rc,
+                                                  const char *pszMsgFmt, va_list va)) RT_IPRT_FORMAT_ATTR(4, 0);
+/** Pointer to FNSUPTRUSTEDERROR. */
+typedef FNSUPTRUSTEDERROR *PFNSUPTRUSTEDERROR;
+
+/**
+ * Secure main.
+ *
+ * This is used for the set-user-ID-on-execute binaries on unixy systems
+ * and when using the open-vboxdrv-via-root-service setup on Windows.
+ *
+ * This function will perform the integrity checks of the VirtualBox
+ * installation, open the support driver, open the root service (later),
+ * and load the DLL corresponding to \a pszProgName and execute its main
+ * function.
+ *
+ * @returns Return code appropriate for main().
+ *
+ * @param   pszProgName     The program name. This will be used to figure out which
+ *                          DLL/SO/DYLIB to load and execute.
+ * @param   fFlags          SUPSECMAIN_FLAGS_XXX.
+ * @param   argc            The argument count.
+ * @param   argv            The argument vector.
+ * @param   envp            The environment vector.
+ */
+DECLHIDDEN(int) SUPR3HardenedMain(const char *pszProgName, uint32_t fFlags, int argc, char **argv, char **envp);
+
+/** @name SUPSECMAIN_FLAGS_XXX - SUPR3HardenedMain flags.
+ * @{ */
+/** Don't open the device. (Intended for VirtualBox without -startvm.) */
+#define SUPSECMAIN_FLAGS_DONT_OPEN_DEV              RT_BIT_32(0)
+/** The hardened DLL has a "TrustedError" function (see FNSUPTRUSTEDERROR). */
+#define SUPSECMAIN_FLAGS_TRUSTED_ERROR              RT_BIT_32(1)
+/** Hack for making VirtualBoxVM use VirtualBox.dylib on Mac OS X.
+ * @note Not used since 6.0  */
+#define SUPSECMAIN_FLAGS_OSX_VM_APP                 RT_BIT_32(2)
+/** The first process.
+ * @internal  */
+#define SUPSECMAIN_FLAGS_FIRST_PROCESS              RT_BIT_32(3)
+/** Program binary location mask. */
+#define SUPSECMAIN_FLAGS_LOC_MASK                   UINT32_C(0x00000030)
+/** Default binary location is the application binary directory.  Does
+ * not need to be given explicitly (it's 0).  */
+#define SUPSECMAIN_FLAGS_LOC_APP_BIN                UINT32_C(0x00000000)
+/** The binary is located in the testcase directory instead of the
+ * default application binary directory. */
+#define SUPSECMAIN_FLAGS_LOC_TESTCASE               UINT32_C(0x00000010)
+/** The binary is located in a nested application bundle under Resources/ in the
+ * main Mac OS X application (think Resources/VirtualBoxVM.app).  */
+#define SUPSECMAIN_FLAGS_LOC_OSX_HLP_APP            UINT32_C(0x00000020)
+/** Force driverless mode. */
+#define SUPSECMAIN_FLAGS_DRIVERLESS                 RT_BIT_32(8)
+/** Driverless IEM-only mode is allowed, so don't fail fatally just because
+ * the VBox support driver is unavailable. */
+#define SUPSECMAIN_FLAGS_DRIVERLESS_IEM_ALLOWED     RT_BIT_32(9)
+#ifdef VBOX_WITH_DRIVERLESS_NEM_FALLBACK
+/** Driverless NEM is a fallback posibility, so don't fail fatally just
+ * because the VBox support driver is unavailable.
+ * This may imply checking NEM requirements, depending on the host.
+ * @note Not supported on Windows. */
+# define SUPSECMAIN_FLAGS_DRIVERLESS_NEM_FALLBACK   RT_BIT_32(10)
+#endif
+
+/** @} */
+
+/**
+ * Initializes the support library.
+ *
+ * Each successful call to SUPR3Init() or SUPR3InitEx must be countered by a
+ * call to SUPR3Term(false).
+ *
+ * @returns VBox status code.
+ * @param   ppSession       Where to store the session handle. Defaults to NULL.
+ */
+SUPR3DECL(int) SUPR3Init(PSUPDRVSESSION *ppSession);
+
+/**
+ * Initializes the support library, extended version.
+ *
+ * Each successful call to SUPR3Init() or SUPR3InitEx must be countered by a
+ * call to SUPR3Term(false).
+ *
+ * @returns VBox status code.
+ * @param   fFlags          SUPR3INIT_F_XXX
+ * @param   ppSession       Where to store the session handle. Defaults to NULL.
+ */
+SUPR3DECL(int) SUPR3InitEx(uint32_t fFlags, PSUPDRVSESSION *ppSession);
+/** @name SUPR3INIT_F_XXX - Flags for SUPR3InitEx
+ * @{ */
+/** Unrestricted access. */
+#define SUPR3INIT_F_UNRESTRICTED                RT_BIT_32(0)
+/** Limited access (for Main). */
+#define SUPR3INIT_F_LIMITED                     RT_BIT_32(1)
+/** Force driverless mode. */
+#define SUPR3INIT_F_DRIVERLESS                  RT_BIT_32(2)
+/** Allow driverless IEM mode if the VBox support driver is unavailable.
+ * @see SUPSECMAIN_FLAGS_DRIVERLESS_IEM_ALLOWED */
+#define SUPR3INIT_F_DRIVERLESS_IEM_ALLOWED      RT_BIT_32(3)
+#ifdef VBOX_WITH_DRIVERLESS_NEM_FALLBACK
+/** Allow driverless NEM mode as fallback if the VBox support driver is unavailable.
+ * @see SUPSECMAIN_FLAGS_DRIVERLESS_NEM_FALLBACK */
+# define SUPR3INIT_F_DRIVERLESS_NEM_FALLBACK    RT_BIT_32(4)
+#endif
+/** Mask with all the flags that may trigger driverless mode. */
+#ifdef VBOX_WITH_DRIVERLESS_NEM_FALLBACK
+# define SUPR3INIT_F_DRIVERLESS_MASK            UINT32_C(0x0000001c)
+#else
+# define SUPR3INIT_F_DRIVERLESS_MASK            UINT32_C(0x0000000c)
+#endif
+/** @} */
+
+/**
+ * Terminates the support library.
+ *
+ * @returns VBox status code.
+ * @param   fForced     Forced termination. This means to ignore the
+ *                      init call count and just terminated.
+ */
+#ifdef __cplusplus
+SUPR3DECL(int) SUPR3Term(bool fForced = false);
+#else
+SUPR3DECL(int) SUPR3Term(int fForced);
+#endif
+
+/**
+ * Check if the support library is operating in driverless mode.
+ *
+ * @returns true/false accordingly.
+ * @see     SUPR3INIT_F_DRIVERLESS_IEM_ALLOWED,
+ *          SUPR3INIT_F_DRIVERLESS_NEM_FALLBACK
+ */
+SUPR3DECL(bool) SUPR3IsDriverless(void);
+
+/**
+ * Sets the ring-0 VM handle for use with fast IOCtls.
+ *
+ * @returns VBox status code.
+ * @param   pVMR0       The ring-0 VM handle.
+ *                      NIL_RTR0PTR can be used to unset the handle when the
+ *                      VM is about to be destroyed.
+ */
+SUPR3DECL(int) SUPR3SetVMForFastIOCtl(PVMR0 pVMR0);
+
+/**
+ * Calls the HC R0 VMM entry point.
+ * See VMMR0Entry() for more details.
+ *
+ * @returns error code specific to uFunction.
+ * @param   pVMR0       Pointer to the Ring-0 (Host Context) mapping of the VM structure.
+ * @param   idCpu       The virtual CPU ID.
+ * @param   uOperation  Operation to execute.
+ * @param   pvArg       Argument.
+ */
+SUPR3DECL(int) SUPR3CallVMMR0(PVMR0 pVMR0, VMCPUID idCpu, unsigned uOperation, void *pvArg);
+
+/**
+ * Variant of SUPR3CallVMMR0, except that this takes the fast ioclt path
+ * regardsless of compile-time defaults.
+ *
+ * @returns VBox status code.
+ * @param   pVMR0       The ring-0 VM handle.
+ * @param   uOperation  The operation; only the SUP_VMMR0_DO_* ones are valid.
+ * @param   idCpu       The virtual CPU ID.
+ */
+SUPR3DECL(int) SUPR3CallVMMR0Fast(PVMR0 pVMR0, unsigned uOperation, VMCPUID idCpu);
+
+/**
+ * Calls the HC R0 VMM entry point, in a safer but slower manner than
+ * SUPR3CallVMMR0. When entering using this call the R0 components can call
+ * into the host kernel (i.e. use the SUPR0 and RT APIs).
+ *
+ * See VMMR0Entry() for more details.
+ *
+ * @returns error code specific to uFunction.
+ * @param   pVMR0       Pointer to the Ring-0 (Host Context) mapping of the VM structure.
+ * @param   idCpu       The virtual CPU ID.
+ * @param   uOperation  Operation to execute.
+ * @param   u64Arg      Constant argument.
+ * @param   pReqHdr     Pointer to a request header. Optional.
+ *                      This will be copied in and out of kernel space. There currently is a size
+ *                      limit on this, just below 4KB.
+ */
+SUPR3DECL(int) SUPR3CallVMMR0Ex(PVMR0 pVMR0, VMCPUID idCpu, unsigned uOperation, uint64_t u64Arg, PSUPVMMR0REQHDR pReqHdr);
+
+/**
+ * Calls a ring-0 service.
+ *
+ * The operation and the request packet is specific to the service.
+ *
+ * @returns error code specific to uFunction.
+ * @param   pszService  The service name.
+ * @param   cchService  The length of the service name.
+ * @param   uOperation  The request number.
+ * @param   u64Arg      Constant argument.
+ * @param   pReqHdr     Pointer to a request header. Optional.
+ *                      This will be copied in and out of kernel space. There currently is a size
+ *                      limit on this, just below 4KB.
+ */
+SUPR3DECL(int) SUPR3CallR0Service(const char *pszService, size_t cchService, uint32_t uOperation, uint64_t u64Arg, PSUPR0SERVICEREQHDR pReqHdr);
+
+/** Which logger. */
+typedef enum SUPLOGGER
+{
+    SUPLOGGER_DEBUG = 1,
+    SUPLOGGER_RELEASE
+} SUPLOGGER;
+
+/**
+ * Changes the settings of the specified ring-0 logger.
+ *
+ * @returns VBox status code.
+ * @param   enmWhich    Which logger.
+ * @param   pszFlags    The flags settings.
+ * @param   pszGroups   The groups settings.
+ * @param   pszDest     The destination specificier.
+ */
+SUPR3DECL(int) SUPR3LoggerSettings(SUPLOGGER enmWhich, const char *pszFlags, const char *pszGroups, const char *pszDest);
+
+/**
+ * Creates a ring-0 logger instance.
+ *
+ * @returns VBox status code.
+ * @param   enmWhich    Which logger to create.
+ * @param   pszFlags    The flags settings.
+ * @param   pszGroups   The groups settings.
+ * @param   pszDest     The destination specificier.
+ */
+SUPR3DECL(int) SUPR3LoggerCreate(SUPLOGGER enmWhich, const char *pszFlags, const char *pszGroups, const char *pszDest);
+
+/**
+ * Destroys a ring-0 logger instance.
+ *
+ * @returns VBox status code.
+ * @param   enmWhich    Which logger.
+ */
+SUPR3DECL(int) SUPR3LoggerDestroy(SUPLOGGER enmWhich);
+
+/**
+ * Queries the paging mode of the host OS.
+ *
+ * @returns The paging mode.
+ */
+SUPR3DECL(SUPPAGINGMODE) SUPR3GetPagingMode(void);
+
+/**
+ * Allocate zero-filled pages.
+ *
+ * Use this to allocate a number of pages suitable for seeding / locking.
+ * Call SUPR3PageFree() to free the pages once done with them.
+ *
+ * @returns VBox status.
+ * @param   cPages          Number of pages to allocate.
+ * @param   fFlags          SUP_PAGE_ALLOC_F_XXX
+ * @param   ppvPages        Where to store the base pointer to the allocated pages.
+ */
+SUPR3DECL(int) SUPR3PageAlloc(size_t cPages, uint32_t fFlags, void **ppvPages);
+
+/** @name SUP_PAGE_ALLOC_F_XXX - SUPR3PageAlloc flags.
+ * @{ */
+/** Use large pages if available. */
+#define SUP_PAGE_ALLOC_F_LARGE_PAGES    RT_BIT_32(0)
+/** Advice that the allocated pages will probably be locked by
+ * RTR0MemObjLockUser later, so play nice if needed. */
+#define SUP_PAGE_ALLOC_F_FOR_LOCKING    RT_BIT_32(1)
+/** Mask of valid flags. */
+#define SUP_PAGE_ALLOC_F_VALID_MASK     UINT32_C(0x00000003)
+/** @} */
+
+/**
+ * Frees pages allocated with SUPR3PageAlloc().
+ *
+ * @returns VBox status.
+ * @param   pvPages         Pointer returned by SUPR3PageAlloc().
+ * @param   cPages          Number of pages that was allocated.
+ */
+SUPR3DECL(int) SUPR3PageFree(void *pvPages, size_t cPages);
+
+/**
+ * Allocate non-zeroed, locked, pages with user and, optionally, kernel
+ * mappings.
+ *
+ * Use SUPR3PageFreeEx() to free memory allocated with this function.
+ *
+ * @returns VBox status code.
+ * @param   cPages          The number of pages to allocate.
+ * @param   fFlags          Flags, reserved. Must be zero.
+ * @param   ppvPages        Where to store the address of the user mapping.
+ * @param   pR0Ptr          Where to store the address of the kernel mapping.
+ *                          NULL if no kernel mapping is desired.
+ * @param   paPages         Where to store the physical addresses of each page.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3PageAllocEx(size_t cPages, uint32_t fFlags, void **ppvPages, PRTR0PTR pR0Ptr, PSUPPAGE paPages);
+
+/**
+ * Maps a portion of a ring-3 only allocation into kernel space.
+ *
+ * @returns VBox status code.
+ *
+ * @param   pvR3            The address SUPR3PageAllocEx return.
+ * @param   off             Offset to start mapping at. Must be page aligned.
+ * @param   cb              Number of bytes to map. Must be page aligned.
+ * @param   fFlags          Flags, must be zero.
+ * @param   pR0Ptr          Where to store the address on success.
+ *
+ */
+SUPR3DECL(int) SUPR3PageMapKernel(void *pvR3, uint32_t off, uint32_t cb, uint32_t fFlags, PRTR0PTR pR0Ptr);
+
+/**
+ * Changes the protection of
+ *
+ * @returns VBox status code.
+ * @retval  VERR_NOT_SUPPORTED if the OS doesn't allow us to change page level
+ *          protection. See also RTR0MemObjProtect.
+ *
+ * @param   pvR3            The ring-3 address SUPR3PageAllocEx returned.
+ * @param   R0Ptr           The ring-0 address SUPR3PageAllocEx returned if it
+ *                          is desired that the corresponding ring-0 page
+ *                          mappings should change protection as well. Pass
+ *                          NIL_RTR0PTR if the ring-0 pages should remain
+ *                          unaffected.
+ * @param   off             Offset to start at which to start chagning the page
+ *                          level protection. Must be page aligned.
+ * @param   cb              Number of bytes to change. Must be page aligned.
+ * @param   fProt           The new page level protection, either a combination
+ *                          of RTMEM_PROT_READ, RTMEM_PROT_WRITE and
+ *                          RTMEM_PROT_EXEC, or just RTMEM_PROT_NONE.
+ */
+SUPR3DECL(int) SUPR3PageProtect(void *pvR3, RTR0PTR R0Ptr, uint32_t off, uint32_t cb, uint32_t fProt);
+
+/**
+ * Free pages allocated by SUPR3PageAllocEx.
+ *
+ * @returns VBox status code.
+ * @param   pvPages         The address of the user mapping.
+ * @param   cPages          The number of pages.
+ */
+SUPR3DECL(int) SUPR3PageFreeEx(void *pvPages, size_t cPages);
+
+/**
+ * Allocated memory with page aligned memory with a contiguous and locked physical
+ * memory backing below 4GB.
+ *
+ * @returns Pointer to the allocated memory (virtual address).
+ *          *pHCPhys is set to the physical address of the memory.
+ *          If ppvR0 isn't NULL, *ppvR0 is set to the ring-0 mapping.
+ *          The returned memory must be freed using SUPR3ContFree().
+ * @returns NULL on failure.
+ * @param   cPages      Number of pages to allocate.
+ * @param   pR0Ptr      Where to store the ring-0 mapping of the allocation. (optional)
+ * @param   pHCPhys     Where to store the physical address of the memory block.
+ *
+ * @remark  This 2nd version of this API exists because we're not able to map the
+ *          ring-3 mapping executable on WIN64. This is a serious problem in regard to
+ *          the world switchers.
+ */
+SUPR3DECL(void *) SUPR3ContAlloc(size_t cPages, PRTR0PTR pR0Ptr, PRTHCPHYS pHCPhys);
+
+/**
+ * Frees memory allocated with SUPR3ContAlloc().
+ *
+ * @returns VBox status code.
+ * @param   pv          Pointer to the memory block which should be freed.
+ * @param   cPages      Number of pages to be freed.
+ */
+SUPR3DECL(int) SUPR3ContFree(void *pv, size_t cPages);
+
+/**
+ * Allocated non contiguous physical memory below 4GB.
+ *
+ * The memory isn't zeroed.
+ *
+ * @returns VBox status code.
+ * @returns NULL on failure.
+ * @param   cPages      Number of pages to allocate.
+ * @param   ppvPages    Where to store the pointer to the allocated memory.
+ *                      The pointer stored here on success must be passed to
+ *                      SUPR3LowFree when the memory should be released.
+ * @param   ppvPagesR0  Where to store the ring-0 pointer to the allocated memory. optional.
+ * @param   paPages     Where to store the physical addresses of the individual pages.
+ */
+SUPR3DECL(int) SUPR3LowAlloc(size_t cPages, void **ppvPages, PRTR0PTR ppvPagesR0, PSUPPAGE paPages);
+
+/**
+ * Frees memory allocated with SUPR3LowAlloc().
+ *
+ * @returns VBox status code.
+ * @param   pv          Pointer to the memory block which should be freed.
+ * @param   cPages      Number of pages that was allocated.
+ */
+SUPR3DECL(int) SUPR3LowFree(void *pv, size_t cPages);
+
+/**
+ * Load a module into R0 HC.
+ *
+ * This will verify the file integrity in a similar manner as
+ * SUPR3HardenedVerifyFile before loading it.
+ *
+ * @returns VBox status code.
+ * @param   pszFilename     The path to the image file.
+ * @param   pszModule       The module name. Max 32 bytes.
+ * @param   ppvImageBase    Where to store the image address.
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3LoadModule(const char *pszFilename, const char *pszModule, void **ppvImageBase, PRTERRINFO pErrInfo);
+
+/**
+ * Load a module into R0 HC.
+ *
+ * This will verify the file integrity in a similar manner as
+ * SUPR3HardenedVerifyFile before loading it.
+ *
+ * @returns VBox status code.
+ * @param   pszFilename         The path to the image file.
+ * @param   pszModule           The module name. Max 32 bytes.
+ * @param   pszSrvReqHandler    The name of the service request handler entry
+ *                              point. See FNSUPR0SERVICEREQHANDLER.
+ * @param   ppvImageBase        Where to store the image address.
+ */
+SUPR3DECL(int) SUPR3LoadServiceModule(const char *pszFilename, const char *pszModule,
+                                      const char *pszSrvReqHandler, void **ppvImageBase);
+
+/**
+ * Frees a R0 HC module.
+ *
+ * @returns VBox status code.
+ * @param   pvImageBase     The base address of the image to free.
+ * @remark  This will not actually 'free' the module, there are of course usage counting.
+ */
+SUPR3DECL(int) SUPR3FreeModule(void *pvImageBase);
+
+/**
+ * Lock down the module loader interface.
+ *
+ * This will lock down the module loader interface. No new modules can be
+ * loaded and all loaded modules can no longer be freed.
+ *
+ * @returns VBox status code.
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3LockDownLoader(PRTERRINFO pErrInfo);
+
+/**
+ * Get the address of a symbol in a ring-0 module.
+ *
+ * @returns VBox status code.
+ * @param   pvImageBase     The base address of the image to search.
+ * @param   pszSymbol       Symbol name. If it's value is less than 64k it's treated like a
+ *                          ordinal value rather than a string pointer.
+ * @param   ppvValue        Where to store the symbol value.
+ */
+SUPR3DECL(int) SUPR3GetSymbolR0(void *pvImageBase, const char *pszSymbol, void **ppvValue);
+
+/**
+ * Load R0 HC VMM code.
+ *
+ * @returns VBox status code.
+ * @deprecated  Use SUPR3LoadModule(pszFilename, "VMMR0.r0", &pvImageBase)
+ * @param   pszFilename     Full path to the VMMR0.r0 file (silly).
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3LoadVMM(const char *pszFilename, PRTERRINFO pErrInfo);
+
+/**
+ * Unloads R0 HC VMM code.
+ *
+ * @returns VBox status code.
+ * @deprecated  Use SUPR3FreeModule().
+ */
+SUPR3DECL(int) SUPR3UnloadVMM(void);
+
+/**
+ * Get the physical address of the GIP.
+ *
+ * @returns VBox status code.
+ * @param   pHCPhys     Where to store the physical address of the GIP.
+ */
+SUPR3DECL(int) SUPR3GipGetPhys(PRTHCPHYS pHCPhys);
+
+/**
+ * Initializes only the bits relevant for the SUPR3HardenedVerify* APIs.
+ *
+ * This is for users that don't necessarily need to initialize the whole of
+ * SUPLib.  There is no harm in calling this one more time.
+ *
+ * @returns VBox status code.
+ * @remarks Currently not counted, so only call once.
+ */
+SUPR3DECL(int) SUPR3HardenedVerifyInit(void);
+
+/**
+ * Reverses the effect of SUPR3HardenedVerifyInit if SUPR3InitEx hasn't been
+ * called.
+ *
+ * Ignored if the support library was initialized using SUPR3Init or
+ * SUPR3InitEx.
+ *
+ * @returns VBox status code.
+ */
+SUPR3DECL(int) SUPR3HardenedVerifyTerm(void);
+
+/**
+ * Verifies the integrity of a file, and optionally opens it.
+ *
+ * The integrity check is for whether the file is suitable for loading into
+ * the hypervisor or VM process. The integrity check may include verifying
+ * the authenticode/elfsign/whatever signature of the file, which can take
+ * a little while.
+ *
+ * @returns VBox status code. On failure it will have printed a LogRel message.
+ *
+ * @param   pszFilename     The file.
+ * @param   pszWhat         For the LogRel on failure.
+ * @param   phFile          Where to store the handle to the opened file. This is optional, pass NULL
+ *                          if the file should not be opened.
+ * @deprecated Write a new one.
+ */
+SUPR3DECL(int) SUPR3HardenedVerifyFile(const char *pszFilename, const char *pszWhat, PRTFILE phFile);
+
+/**
+ * Verifies the integrity of a the current process, including the image
+ * location and that the invocation was absolute.
+ *
+ * This must currently be called after initializing the runtime.  The intended
+ * audience is set-uid-to-root applications, root services and similar.
+ *
+ * @returns VBox status code.  On failure
+ *          message.
+ * @param   pszArgv0        The first argument to main().
+ * @param   fInternal       Set this to @c true if this is an internal
+ *                          VirtualBox application.  Otherwise pass @c false.
+ * @param   pErrInfo        Where to return extended error information.
+ */
+SUPR3DECL(int) SUPR3HardenedVerifySelf(const char *pszArgv0, bool fInternal, PRTERRINFO pErrInfo);
+
+/**
+ * Verifies the integrity of an installation directory.
+ *
+ * The integrity check verifies that the directory cannot be tampered with by
+ * normal users on the system.  On Unix this translates to root ownership and
+ * no symbolic linking.
+ *
+ * @returns VBox status code. On failure a message will be stored in @a pszErr.
+ *
+ * @param   pszDirPath      The directory path.
+ * @param   fRecursive      Whether the check should be recursive or
+ *                          not.  When set, all sub-directores will be checked,
+ *                          including files (@a fCheckFiles is ignored).
+ * @param   fCheckFiles     Whether to apply the same basic integrity check to
+ *                          the files in the directory as the directory itself.
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3HardenedVerifyDir(const char *pszDirPath, bool fRecursive, bool fCheckFiles, PRTERRINFO pErrInfo);
+
+/**
+ * Verifies the integrity of a plug-in module.
+ *
+ * This is similar to SUPR3HardenedLdrLoad, except it does not load the module
+ * and that the module does not have to be shipped with VirtualBox.
+ *
+ * @returns VBox status code. On failure a message will be stored in @a pszErr.
+ *
+ * @param   pszFilename     The filename of the plug-in module (nothing can be
+ *                          omitted here).
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3HardenedVerifyPlugIn(const char *pszFilename, PRTERRINFO pErrInfo);
+
+/**
+ * Same as RTLdrLoad() but will verify the files it loads (hardened builds).
+ *
+ * Will add dll suffix if missing and try load the file.
+ *
+ * @returns iprt status code.
+ * @param   pszFilename     Image filename. This must have a path.
+ * @param   phLdrMod        Where to store the handle to the loaded module.
+ * @param   fFlags          See RTLDRLOAD_FLAGS_XXX.
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3HardenedLdrLoad(const char *pszFilename, PRTLDRMOD phLdrMod, uint32_t fFlags, PRTERRINFO pErrInfo);
+
+/**
+ * Same as RTLdrLoadAppPriv() but it will verify the files it loads (hardened
+ * builds).
+ *
+ * Will add dll suffix to the file if missing, then look for it in the
+ * architecture dependent application directory.
+ *
+ * @returns iprt status code.
+ * @param   pszFilename     Image filename.
+ * @param   phLdrMod        Where to store the handle to the loaded module.
+ * @param   fFlags          See RTLDRLOAD_FLAGS_XXX.
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3HardenedLdrLoadAppPriv(const char *pszFilename, PRTLDRMOD phLdrMod, uint32_t fFlags, PRTERRINFO pErrInfo);
+
+/**
+ * Same as RTLdrLoad() but will verify the files it loads (hardened builds).
+ *
+ * This differs from SUPR3HardenedLdrLoad() in that it can load modules from
+ * extension packs and anything else safely installed on the system, provided
+ * they pass the hardening tests.
+ *
+ * @returns iprt status code.
+ * @param   pszFilename     The full path to the module, with extension.
+ * @param   phLdrMod        Where to store the handle to the loaded module.
+ * @param   pErrInfo        Where to return extended error information.
+ *                          Optional.
+ */
+SUPR3DECL(int) SUPR3HardenedLdrLoadPlugIn(const char *pszFilename, PRTLDRMOD phLdrMod, PRTERRINFO pErrInfo);
+
+/**
+ * Check if the host kernel can run in VMX root mode.
+ *
+ * @returns VINF_SUCCESS if supported, error code indicating why if not.
+ * @param   ppszWhy         Where to return an explanatory message on failure.
+ */
+SUPR3DECL(int) SUPR3QueryVTxSupported(const char **ppszWhy);
+
+/**
+ * Return VT-x/AMD-V capabilities.
+ *
+ * @returns VINF_SUCCESS if supported, error code indicating why if not.
+ * @param   pfCaps      Pointer to capability dword (out).
+ * @todo Intended for main, which means we need to relax the privilege requires
+ *       when accessing certain vboxdrv functions.
+ */
+SUPR3DECL(int) SUPR3QueryVTCaps(uint32_t *pfCaps);
+
+/**
+ * Check if NEM is supported when no VT-x/AMD-V is indicated by the CPU.
+ *
+ * This is really only for the windows case where we're running in a root
+ * partition and isn't allowed to use the hardware directly.
+ *
+ * @returns True if NEM API support, false if not.
+ */
+SUPR3DECL(bool) SUPR3IsNemSupportedWhenNoVtxOrAmdV(void);
+
+/**
+ * Open the tracer.
+ *
+ * @returns VBox status code.
+ * @param   uCookie         Cookie identifying the tracer we expect to talk to.
+ * @param   uArg            Tracer specific open argument.
+ */
+SUPR3DECL(int) SUPR3TracerOpen(uint32_t uCookie, uintptr_t uArg);
+
+/**
+ * Closes the tracer.
+ *
+ * @returns VBox status code.
+ */
+SUPR3DECL(int) SUPR3TracerClose(void);
+
+/**
+ * Perform an I/O request on the tracer.
+ *
+ * @returns VBox status.
+ * @param   uCmd                The tracer command.
+ * @param   uArg                The argument.
+ * @param   piRetVal            Where to store the tracer return value.
+ */
+SUPR3DECL(int) SUPR3TracerIoCtl(uintptr_t uCmd, uintptr_t uArg, int32_t *piRetVal);
+
+/**
+ * Registers the user module with the tracer.
+ *
+ * @returns VBox status code.
+ * @param   hModNative          Native module handle.  Pass ~(uintptr_t)0 if not
+ *                              at hand.
+ * @param   pszModule           The module name.
+ * @param   pVtgHdr             The VTG header.
+ * @param   uVtgHdrAddr         The address to which the VTG header is loaded
+ *                              in the relevant execution context.
+ * @param   fFlags              See SUP_TRACER_UMOD_FLAGS_XXX
+ */
+SUPR3DECL(int) SUPR3TracerRegisterModule(uintptr_t hModNative, const char *pszModule, struct VTGOBJHDR *pVtgHdr,
+                                         RTUINTPTR uVtgHdrAddr, uint32_t fFlags);
+
+/**
+ * Deregisters the user module.
+ *
+ * @returns VBox status code.
+ * @param   pVtgHdr             The VTG header.
+ */
+SUPR3DECL(int) SUPR3TracerDeregisterModule(struct VTGOBJHDR *pVtgHdr);
+
+/**
+ * Fire the probe.
+ *
+ * @param   pVtgProbeLoc        The probe location record.
+ * @param   uArg0               Raw probe argument 0.
+ * @param   uArg1               Raw probe argument 1.
+ * @param   uArg2               Raw probe argument 2.
+ * @param   uArg3               Raw probe argument 3.
+ * @param   uArg4               Raw probe argument 4.
+ */
+SUPDECL(void)  SUPTracerFireProbe(struct VTGPROBELOC *pVtgProbeLoc, uintptr_t uArg0, uintptr_t uArg1, uintptr_t uArg2,
+                                  uintptr_t uArg3, uintptr_t uArg4);
+
+/**
+ * Attempts to read the value of an MSR.
+ *
+ * @returns VBox status code.
+ * @param   uMsr                The MSR to read.
+ * @param   idCpu               The CPU to read it on, NIL_RTCPUID if it doesn't
+ *                              matter which CPU.
+ * @param   puValue             Where to return the value.
+ * @param   pfGp                Where to store the \#GP indicator for the read
+ *                              operation.
+ */
+SUPR3DECL(int) SUPR3MsrProberRead(uint32_t uMsr, RTCPUID idCpu, uint64_t *puValue, bool *pfGp);
+
+/**
+ * Attempts to write to an MSR.
+ *
+ * @returns VBox status code.
+ * @param   uMsr                The MSR to write to.
+ * @param   idCpu               The CPU to wrtie it on, NIL_RTCPUID if it
+ *                              doesn't matter which CPU.
+ * @param   uValue              The value to write.
+ * @param   pfGp                Where to store the \#GP indicator for the write
+ *                              operation.
+ */
+SUPR3DECL(int) SUPR3MsrProberWrite(uint32_t uMsr, RTCPUID idCpu, uint64_t uValue, bool *pfGp);
+
+/**
+ * Attempts to modify the value of an MSR.
+ *
+ * @returns VBox status code.
+ * @param   uMsr                The MSR to modify.
+ * @param   idCpu               The CPU to modify it on, NIL_RTCPUID if it
+ *                              doesn't matter which CPU.
+ * @param   fAndMask            The bits to keep in the current MSR value.
+ * @param   fOrMask             The bits to set before writing.
+ * @param   pResult             The result buffer.
+ */
+SUPR3DECL(int) SUPR3MsrProberModify(uint32_t uMsr, RTCPUID idCpu, uint64_t fAndMask, uint64_t fOrMask,
+                                    PSUPMSRPROBERMODIFYRESULT pResult);
+
+/**
+ * Attempts to modify the value of an MSR, extended version.
+ *
+ * @returns VBox status code.
+ * @param   uMsr                The MSR to modify.
+ * @param   idCpu               The CPU to modify it on, NIL_RTCPUID if it
+ *                              doesn't matter which CPU.
+ * @param   fAndMask            The bits to keep in the current MSR value.
+ * @param   fOrMask             The bits to set before writing.
+ * @param   fFaster             If set to @c true some cache/tlb invalidation is
+ *                              skipped, otherwise behave like
+ *                              SUPR3MsrProberModify.
+ * @param   pResult             The result buffer.
+ */
+SUPR3DECL(int) SUPR3MsrProberModifyEx(uint32_t uMsr, RTCPUID idCpu, uint64_t fAndMask, uint64_t fOrMask, bool fFaster,
+                                      PSUPMSRPROBERMODIFYRESULT pResult);
+
+/**
+ * Resume built-in keyboard on MacBook Air and Pro hosts.
+ *
+ * @returns VBox status code.
+ */
+SUPR3DECL(int) SUPR3ResumeSuspendedKeyboards(void);
+
+/**
+ * Measure the TSC-delta for the specified CPU.
+ *
+ * @returns VBox status code.
+ * @param   idCpu               The CPU to measure the TSC-delta for.
+ * @param   fAsync              Whether the measurement is asynchronous, returns
+ *                              immediately after signalling a measurement
+ *                              request.
+ * @param   fForce              Whether to perform a measurement even if the
+ *                              specified CPU has a (possibly) valid TSC delta.
+ * @param   cRetries            Number of times to retry failed delta
+ *                              measurements.
+ * @param   cMsWaitRetry        Number of milliseconds to wait between retries.
+ */
+SUPR3DECL(int) SUPR3TscDeltaMeasure(RTCPUID idCpu, bool fAsync, bool fForce, uint8_t cRetries, uint8_t cMsWaitRetry);
+
+/**
+ * Reads the delta-adjust TSC value.
+ *
+ * @returns VBox status code.
+ * @param   puTsc           Where to store the read TSC value.
+ * @param   pidApic         Where to store the APIC ID of the CPU where the TSC
+ *                          was read (optional, can be NULL).
+ */
+SUPR3DECL(int) SUPR3ReadTsc(uint64_t *puTsc, uint16_t *pidApic);
+
+/**
+ * Modifies the GIP flags.
+ *
+ * @returns VBox status code.
+ * @param   fOrMask         The OR mask of the GIP flags, see SUPGIP_FLAGS_XXX.
+ * @param   fAndMask        The AND mask of the GIP flags, see SUPGIP_FLAGS_XXX.
+ */
+SUPR3DECL(int) SUPR3GipSetFlags(uint32_t fOrMask, uint32_t fAndMask);
+
+/**
+ * Return processor microcode revision, if applicable.
+ *
+ * @returns VINF_SUCCESS if supported, error code indicating why if not.
+ * @param   puMicrocodeRev  Pointer to microcode revision dword (out).
+ */
+SUPR3DECL(int) SUPR3QueryMicrocodeRev(uint32_t *puMicrocodeRev);
+
+/**
+ * Gets hardware-virtualization MSRs of the CPU, if available.
+ *
+ * @returns VINF_SUCCESS if available, error code indicating why if not.
+ * @param   pHwvirtMsrs     Where to store the hardware-virtualization MSRs.
+ * @param   fForceRequery   Whether to force complete re-querying of MSRs (rather
+ *                          than fetching cached values when available).
+ */
+SUPR3DECL(int) SUPR3GetHwvirtMsrs(PSUPHWVIRTMSRS pHwvirtMsrs, bool fForceRequery);
+
+/** @} */
+#endif /* IN_RING3 */
+
+
+/** @name User mode module flags (SUPR3TracerRegisterModule & SUP_IOCTL_TRACER_UMOD_REG).
+ * @{ */
+/** Executable image. */
+#define SUP_TRACER_UMOD_FLAGS_EXE           UINT32_C(1)
+/** Shared library (DLL, DYLIB, SO, etc). */
+#define SUP_TRACER_UMOD_FLAGS_SHARED        UINT32_C(2)
+/** Image type mask. */
+#define SUP_TRACER_UMOD_FLAGS_TYPE_MASK     UINT32_C(3)
+/** @} */
+
+
+#ifdef IN_RING0
+/** @defgroup   grp_sup_r0     SUP Host Context Ring-0 API
+ * @{
+ */
+
+/**
+ * Security objectype.
+ */
+typedef enum SUPDRVOBJTYPE
+{
+    /** The usual invalid object. */
+    SUPDRVOBJTYPE_INVALID = 0,
+    /** A Virtual Machine instance. */
+    SUPDRVOBJTYPE_VM,
+    /** Internal network. */
+    SUPDRVOBJTYPE_INTERNAL_NETWORK,
+    /** Internal network interface. */
+    SUPDRVOBJTYPE_INTERNAL_NETWORK_INTERFACE,
+    /** Single release event semaphore. */
+    SUPDRVOBJTYPE_SEM_EVENT,
+    /** Multiple release event semaphore. */
+    SUPDRVOBJTYPE_SEM_EVENT_MULTI,
+    /** Raw PCI device. */
+    SUPDRVOBJTYPE_RAW_PCI_DEVICE,
+    /** The first invalid object type in this end. */
+    SUPDRVOBJTYPE_END,
+    /** The usual 32-bit type size hack. */
+    SUPDRVOBJTYPE_32_BIT_HACK = 0x7ffffff
+} SUPDRVOBJTYPE;
+
+/**
+ * Object destructor callback.
+ * This is called for reference counted objectes when the count reaches 0.
+ *
+ * @param   pvObj       The object pointer.
+ * @param   pvUser1     The first user argument.
+ * @param   pvUser2     The second user argument.
+ */
+typedef DECLCALLBACKTYPE(void, FNSUPDRVDESTRUCTOR,(void *pvObj, void *pvUser1, void *pvUser2));
+/** Pointer to a FNSUPDRVDESTRUCTOR(). */
+typedef FNSUPDRVDESTRUCTOR *PFNSUPDRVDESTRUCTOR;
+
+/**
+ * Service request callback function.
+ *
+ * @returns VBox status code.
+ * @param   pSession    The caller's session.
+ * @param   uOperation  The operation identifier.
+ * @param   u64Arg      64-bit integer argument.
+ * @param   pReqHdr     The request header. Input / Output. Optional.
+ */
+typedef DECLCALLBACKTYPE(int, FNSUPR0SERVICEREQHANDLER,(PSUPDRVSESSION pSession, uint32_t uOperation,
+                                                        uint64_t u64Arg, PSUPR0SERVICEREQHDR pReqHdr));
+/** Pointer to a FNR0SERVICEREQHANDLER(). */
+typedef R0PTRTYPE(FNSUPR0SERVICEREQHANDLER *) PFNSUPR0SERVICEREQHANDLER;
+
+/**
+ * Symbol entry for a wrapped module (SUPLDRWRAPPEDMODULE).
+ */
+typedef struct SUPLDRWRAPMODSYMBOL
+{
+    /** The symbol namel. */
+    const char *pszSymbol;
+    /** The symbol address/value. */
+    PFNRT       pfnValue;
+} SUPLDRWRAPMODSYMBOL;
+/** Pointer to a symbol entry for a wrapped module. */
+typedef SUPLDRWRAPMODSYMBOL const *PCSUPLDRWRAPMODSYMBOL;
+
+/**
+ * Registration structure for SUPR0LdrRegisterWrapperModule.
+ *
+ * This is used to register a .r0 module when loaded manually as a native kernel
+ * module/extension/driver/whatever.
+ */
+typedef struct SUPLDRWRAPPEDMODULE
+{
+    /** Magic value (SUPLDRWRAPPEDMODULE_MAGIC). */
+    uint32_t                    uMagic;
+    /** The structure version. */
+    uint16_t                    uVersion;
+    /** SUPLDRWRAPPEDMODULE_F_XXX.   */
+    uint16_t                    fFlags;
+
+    /** As close as possible to the start of the image. */
+    void                       *pvImageStart;
+    /** As close as possible to the end of the image. */
+    void                       *pvImageEnd;
+
+    /** @name Standar entry points
+     * @{ */
+    /** Pointer to the module initialization function (optional). */
+    DECLCALLBACKMEMBER(int,     pfnModuleInit,(void *hMod));
+    /** Pointer to the module termination function (optional). */
+    DECLCALLBACKMEMBER(void,    pfnModuleTerm,(void *hMod));
+    /** The VMMR0EntryFast entry point for VMMR0. */
+    PFNRT                       pfnVMMR0EntryFast;
+    /** The VMMR0EntryEx entry point for VMMR0. */
+    PFNRT                       pfnVMMR0EntryEx;
+    /** The service request handler entry point. */
+    PFNSUPR0SERVICEREQHANDLER   pfnServiceReqHandler;
+    /** @} */
+
+    /** The symbol table. */
+    PCSUPLDRWRAPMODSYMBOL       paSymbols;
+    /** Number of symbols. */
+    uint32_t                    cSymbols;
+
+    /** The normal VBox module name. */
+    char                        szName[32];
+    /** Repeating the magic value here (SUPLDRWRAPPEDMODULE_MAGIC). */
+    uint32_t                    uEndMagic;
+} SUPLDRWRAPPEDMODULE;
+/** Pointer to the wrapped module registration structure. */
+typedef SUPLDRWRAPPEDMODULE const *PCSUPLDRWRAPPEDMODULE;
+
+/** Magic value for the wrapped module structure (Doris lessing). */
+#define SUPLDRWRAPPEDMODULE_MAGIC       UINT32_C(0x19191117)
+/** Current SUPLDRWRAPPEDMODULE structure version. */
+#define SUPLDRWRAPPEDMODULE_VERSION     UINT16_C(0x0001)
+
+/** Set if this is the VMMR0 module.   */
+#define SUPLDRWRAPPEDMODULE_F_VMMR0     UINT16_C(0x0001)
+
+
+SUPR0DECL(void *) SUPR0ObjRegister(PSUPDRVSESSION pSession, SUPDRVOBJTYPE enmType, PFNSUPDRVDESTRUCTOR pfnDestructor, void *pvUser1, void *pvUser2);
+SUPR0DECL(int) SUPR0ObjAddRef(void *pvObj, PSUPDRVSESSION pSession);
+SUPR0DECL(int) SUPR0ObjAddRefEx(void *pvObj, PSUPDRVSESSION pSession, bool fNoBlocking);
+SUPR0DECL(int) SUPR0ObjRelease(void *pvObj, PSUPDRVSESSION pSession);
+SUPR0DECL(int) SUPR0ObjVerifyAccess(void *pvObj, PSUPDRVSESSION pSession, const char *pszObjName);
+
+SUPR0DECL(PVM) SUPR0GetSessionVM(PSUPDRVSESSION pSession);
+SUPR0DECL(PGVM) SUPR0GetSessionGVM(PSUPDRVSESSION pSession);
+SUPR0DECL(int) SUPR0SetSessionVM(PSUPDRVSESSION pSession, PGVM pGVM, PVM pVM);
+SUPR0DECL(RTUID) SUPR0GetSessionUid(PSUPDRVSESSION pSession);
+
+SUPR0DECL(int) SUPR0LockMem(PSUPDRVSESSION pSession, RTR3PTR pvR3, uint32_t cPages, PRTHCPHYS paPages);
+SUPR0DECL(int) SUPR0UnlockMem(PSUPDRVSESSION pSession, RTR3PTR pvR3);
+SUPR0DECL(int) SUPR0ContAlloc(PSUPDRVSESSION pSession, uint32_t cPages, PRTR0PTR ppvR0, PRTR3PTR ppvR3, PRTHCPHYS pHCPhys);
+SUPR0DECL(int) SUPR0ContFree(PSUPDRVSESSION pSession, RTHCUINTPTR uPtr);
+SUPR0DECL(int) SUPR0LowAlloc(PSUPDRVSESSION pSession, uint32_t cPages, PRTR0PTR ppvR0, PRTR3PTR ppvR3, PRTHCPHYS paPages);
+SUPR0DECL(int) SUPR0LowFree(PSUPDRVSESSION pSession, RTHCUINTPTR uPtr);
+SUPR0DECL(int) SUPR0MemAlloc(PSUPDRVSESSION pSession, uint32_t cb, PRTR0PTR ppvR0, PRTR3PTR ppvR3);
+SUPR0DECL(int) SUPR0MemGetPhys(PSUPDRVSESSION pSession, RTHCUINTPTR uPtr, PSUPPAGE paPages);
+SUPR0DECL(int) SUPR0MemFree(PSUPDRVSESSION pSession, RTHCUINTPTR uPtr);
+SUPR0DECL(int) SUPR0PageAllocEx(PSUPDRVSESSION pSession, uint32_t cPages, uint32_t fFlags, PRTR3PTR ppvR3, PRTR0PTR ppvR0, PRTHCPHYS paPages);
+SUPR0DECL(int) SUPR0PageMapKernel(PSUPDRVSESSION pSession, RTR3PTR pvR3, uint32_t offSub, uint32_t cbSub, uint32_t fFlags, PRTR0PTR ppvR0);
+SUPR0DECL(int) SUPR0PageProtect(PSUPDRVSESSION pSession, RTR3PTR pvR3, RTR0PTR pvR0, uint32_t offSub, uint32_t cbSub, uint32_t fProt);
+SUPR0DECL(int) SUPR0PageFree(PSUPDRVSESSION pSession, RTR3PTR pvR3);
+SUPR0DECL(int) SUPR0GipMap(PSUPDRVSESSION pSession, PRTR3PTR ppGipR3, PRTHCPHYS pHCPhysGip);
+SUPR0DECL(int) SUPR0LdrLock(PSUPDRVSESSION pSession);
+SUPR0DECL(int) SUPR0LdrUnlock(PSUPDRVSESSION pSession);
+SUPR0DECL(bool) SUPR0LdrIsLockOwnerByMod(void *hMod, bool fWantToHear);
+SUPR0DECL(int) SUPR0LdrModByName(PSUPDRVSESSION pSession, const char *pszName, void **phMod);
+SUPR0DECL(int) SUPR0LdrModRetain(PSUPDRVSESSION pSession, void *hMod);
+SUPR0DECL(int) SUPR0LdrModRelease(PSUPDRVSESSION pSession, void *hMod);
+#ifdef RT_OS_LINUX
+SUPR0DECL(int) SUPDrvLinuxLdrRegisterWrappedModule(PCSUPLDRWRAPPEDMODULE pWrappedModInfo, const char *pszLnxModName, void **phMod);
+SUPR0DECL(int) SUPDrvLinuxLdrDeregisterWrappedModule(PCSUPLDRWRAPPEDMODULE pWrappedModInfo, void **phMod);
+#endif
+SUPR0DECL(int) SUPR0GetVTSupport(uint32_t *pfCaps);
+SUPR0DECL(int) SUPR0GetHwvirtMsrs(PSUPHWVIRTMSRS pMsrs, uint32_t fCaps, bool fForce);
+SUPR0DECL(int) SUPR0GetSvmUsability(bool fInitSvm);
+SUPR0DECL(int) SUPR0GetVmxUsability(bool *pfIsSmxModeAmbiguous);
+SUPR0DECL(int) SUPR0GetCurrentGdtRw(RTHCUINTPTR *pGdtRw);
+SUPR0DECL(int) SUPR0QueryVTCaps(PSUPDRVSESSION pSession, uint32_t *pfCaps);
+SUPR0DECL(int) SUPR0GipUnmap(PSUPDRVSESSION pSession);
+SUPR0DECL(int) SUPR0QueryUcodeRev(PSUPDRVSESSION pSession, uint32_t *puMicrocodeRev);
+SUPR0DECL(SUPPAGINGMODE) SUPR0GetPagingMode(void);
+SUPR0DECL(RTCCUINTREG) SUPR0ChangeCR4(RTCCUINTREG fOrMask, RTCCUINTREG fAndMask);
+SUPR0DECL(int) SUPR0EnableVTx(bool fEnable);
+SUPR0DECL(bool) SUPR0SuspendVTxOnCpu(void);
+SUPR0DECL(void) SUPR0ResumeVTxOnCpu(bool fSuspended);
+#define SUP_TSCDELTA_MEASURE_F_FORCE        RT_BIT_32(0)
+#define SUP_TSCDELTA_MEASURE_F_ASYNC        RT_BIT_32(1)
+#define SUP_TSCDELTA_MEASURE_F_VALID_MASK   UINT32_C(0x00000003)
+SUPR0DECL(int) SUPR0TscDeltaMeasureBySetIndex(PSUPDRVSESSION pSession, uint32_t iCpuSet, uint32_t fFlags,
+                                              RTMSINTERVAL cMsWaitRetry, RTMSINTERVAL cMsWaitThread, uint32_t cTries);
+
+SUPR0DECL(void) SUPR0BadContext(PSUPDRVSESSION pSession, const char *pszFile, uint32_t uLine, const char *pszExpr);
+
+#if defined(RT_OS_LINUX) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
+/**
+ * Translates a physical address to a virtual mapping (valid up to end of page).
+ * @returns VBox status code.
+ * @param   HCPhys      The physical address, must be page aligned.
+ * @param   ppv         Where to store the mapping address on success.
+ */
+SUPR0DECL(int) SUPR0HCPhysToVirt(RTHCPHYS HCPhys, void **ppv);
+#endif
+
+/** Context structure returned by SUPR0IoCtlSetup for use with
+ * SUPR0IoCtlPerform and cleaned up by SUPR0IoCtlCleanup. */
+typedef struct SUPR0IOCTLCTX *PSUPR0IOCTLCTX;
+
+/**
+ * Sets up a I/O control context for the given handle.
+ *
+ * @returns VBox status code.
+ * @param   pSession        The support driver session.
+ * @param   hHandle         The handle.
+ * @param   fFlags          Flag, MBZ.
+ * @param   ppCtx           Where the context is returned.
+ */
+SUPR0DECL(int) SUPR0IoCtlSetupForHandle(PSUPDRVSESSION pSession, intptr_t hHandle, uint32_t fFlags, PSUPR0IOCTLCTX *ppCtx);
+
+/**
+ * Cleans up the I/O control context when done.
+ *
+ * This won't close the handle passed to SUPR0IoCtlSetupForHandle.
+ *
+ * @returns VBox status code.
+ * @param   pCtx            The I/O control context to cleanup.
+ */
+SUPR0DECL(int) SUPR0IoCtlCleanup(PSUPR0IOCTLCTX pCtx);
+
+/**
+ * Performs an I/O control operation.
+ *
+ * @returns VBox status code.
+ * @param   pCtx            The I/O control context returned by
+ *                          SUPR0IoCtlSetupForHandle.
+ * @param   uFunction       The I/O control function to perform.
+ * @param   pvInput         Pointer to input buffer (ring-0).
+ * @param   pvInputUser     Ring-3 pointer corresponding to @a pvInput.
+ * @param   cbInput         The amount of input.  If zero, both input pointers
+ *                          are expected to be NULL.
+ * @param   pvOutput        Pointer to output buffer (ring-0).
+ * @param   pvOutputUser    Ring-3 pointer corresponding to @a pvInput.
+ * @param   cbOutput        The amount of input.  If zero, both input pointers
+ *                          are expected to be NULL.
+ * @param   piNativeRc      Where to return the native return code.   When
+ *                          specified the VBox status code will typically be
+ *                          VINF_SUCCESS and the caller have to consult this for
+ *                          the actual result of the operation.  (This saves
+ *                          pointless status code conversion.)  Optional.
+ *
+ * @note    On unix systems where there is only one set of buffers possible,
+ *          pass the same pointers as input and output.
+ */
+SUPR0DECL(int)  SUPR0IoCtlPerform(PSUPR0IOCTLCTX pCtx, uintptr_t uFunction,
+                                  void *pvInput, RTR3PTR pvInputUser, size_t cbInput,
+                                  void *pvOutput, RTR3PTR pvOutputUser, size_t cbOutput,
+                                  int32_t *piNativeRc);
+
+/**
+ * Writes to the debugger and/or kernel log, va_list version.
+ *
+ * The length of the formatted message is somewhat limited, so keep things short
+ * and to the point.
+ *
+ * @returns Number of bytes written, mabye.
+ * @param   pszFormat       IPRT format string.
+ * @param   va              Arguments referenced by the format string.
+ */
+SUPR0DECL(int)  SUPR0PrintfV(const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(1, 0);
+
+/**
+ * Writes to the debugger and/or kernel log.
+ *
+ * The length of the formatted message is somewhat limited, so keep things short
+ * and to the point.
+ *
+ * @returns Number of bytes written, mabye.
+ * @param   pszFormat       IPRT format string.
+ * @param   ...             Arguments referenced by the format string.
+ */
+#if defined(__GNUC__) && defined(__inline__)
+/* Define it as static for GCC as it cannot inline functions using va_start() anyway,
+   and linux redefines __inline__ to always inlining forcing gcc to issue an error. */
+static int __attribute__((__unused__))
+#else
+DECLINLINE(int)
+#endif
+RT_IPRT_FORMAT_ATTR(1, 2) SUPR0Printf(const char *pszFormat, ...)
+{
+    va_list va;
+    va_start(va, pszFormat);
+    SUPR0PrintfV(pszFormat, va);
+    va_end(va);
+    return 0;
+}
+
+/* HACK ALERT! See above. */
+#ifdef SUPR0PRINTF_UNDO_INLINE_HACK
+# define __inline__ inline
+#endif
+
+#ifdef IN_RING0
+/** Debug printf macro. This also exist in SUPLib, see SUPLibInternal.h. */
+# ifdef DEBUG
+#  define SUP_DPRINTF(a) SUPR0Printf a
+# else
+#  define SUP_DPRINTF(a) do { } while (0)
+# endif
+#endif
+
+/**
+ * Returns configuration flags of the host kernel.
+ *
+ * @returns Combination of SUPKERNELFEATURES_XXX flags.
+ */
+SUPR0DECL(uint32_t) SUPR0GetKernelFeatures(void);
+
+/**
+ * Notification from R0 VMM prior to loading the guest-FPU register state.
+ *
+ * @returns Whether the host-FPU register state has been saved by the host kernel.
+ * @param   fCtxHook    Whether thread-context hooks are enabled.
+ *
+ * @remarks Called with preemption disabled.
+ */
+SUPR0DECL(bool) SUPR0FpuBegin(bool fCtxHook);
+
+/**
+ * Notification from R0 VMM after saving the guest-FPU register state (and
+ * potentially restoring the host-FPU register state) in ring-0.
+ *
+ * @param   fCtxHook    Whether thread-context hooks are enabled.
+ *
+ * @remarks Called with preemption disabled.
+ */
+SUPR0DECL(void) SUPR0FpuEnd(bool fCtxHook);
+
+/** @copydoc RTLogDefaultInstanceEx
+ * @remarks To allow overriding RTLogDefaultInstanceEx locally. */
+SUPR0DECL(struct RTLOGGER *) SUPR0DefaultLogInstanceEx(uint32_t fFlagsAndGroup);
+/** @copydoc RTLogGetDefaultInstanceEx
+ * @remarks To allow overriding RTLogGetDefaultInstanceEx locally. */
+SUPR0DECL(struct RTLOGGER *) SUPR0GetDefaultLogInstanceEx(uint32_t fFlagsAndGroup);
+/** @copydoc RTLogRelGetDefaultInstanceEx
+ * @remarks To allow overriding RTLogRelGetDefaultInstanceEx locally. */
+SUPR0DECL(struct RTLOGGER *) SUPR0GetDefaultLogRelInstanceEx(uint32_t fFlagsAndGroup);
+
+
+/** @name Absolute symbols
+ * Take the address of these, don't try call them.
+ * @{ */
+SUPR0DECL(void) SUPR0AbsIs64bit(void);
+SUPR0DECL(void) SUPR0Abs64bitKernelCS(void);
+SUPR0DECL(void) SUPR0Abs64bitKernelSS(void);
+SUPR0DECL(void) SUPR0Abs64bitKernelDS(void);
+SUPR0DECL(void) SUPR0AbsKernelCS(void);
+SUPR0DECL(void) SUPR0AbsKernelSS(void);
+SUPR0DECL(void) SUPR0AbsKernelDS(void);
+SUPR0DECL(void) SUPR0AbsKernelES(void);
+SUPR0DECL(void) SUPR0AbsKernelFS(void);
+SUPR0DECL(void) SUPR0AbsKernelGS(void);
+/** @} */
+
+/**
+ * Support driver component factory.
+ *
+ * Component factories are registered by drivers that provides services
+ * such as the host network interface filtering and access to the host
+ * TCP/IP stack.
+ *
+ * @remark Module dependencies and making sure that a component doesn't
+ *         get unloaded while in use, is the sole responsibility of the
+ *         driver/kext/whatever implementing the component.
+ */
+typedef struct SUPDRVFACTORY
+{
+    /** The (unique) name of the component factory. */
+    char szName[56];
+    /**
+     * Queries a factory interface.
+     *
+     * The factory interface is specific to each component and will be be
+     * found in the header(s) for the component alongside its UUID.
+     *
+     * @returns Pointer to the factory interfaces on success, NULL on failure.
+     *
+     * @param   pSupDrvFactory      Pointer to this structure.
+     * @param   pSession            The SUPDRV session making the query.
+     * @param   pszInterfaceUuid    The UUID of the factory interface.
+     */
+    DECLR0CALLBACKMEMBER(void *, pfnQueryFactoryInterface,(struct SUPDRVFACTORY const *pSupDrvFactory, PSUPDRVSESSION pSession, const char *pszInterfaceUuid));
+} SUPDRVFACTORY;
+/** Pointer to a support driver factory. */
+typedef SUPDRVFACTORY *PSUPDRVFACTORY;
+/** Pointer to a const support driver factory. */
+typedef SUPDRVFACTORY const *PCSUPDRVFACTORY;
+
+SUPR0DECL(int) SUPR0ComponentRegisterFactory(PSUPDRVSESSION pSession, PCSUPDRVFACTORY pFactory);
+SUPR0DECL(int) SUPR0ComponentDeregisterFactory(PSUPDRVSESSION pSession, PCSUPDRVFACTORY pFactory);
+SUPR0DECL(int) SUPR0ComponentQueryFactory(PSUPDRVSESSION pSession, const char *pszName, const char *pszInterfaceUuid, void **ppvFactoryIf);
+
+
+/** @name Tracing
+ * @{ */
+
+/**
+ * Tracer data associated with a provider.
+ */
+typedef union SUPDRVTRACERDATA
+{
+    /** Generic */
+    uint64_t                    au64[2];
+
+    /** DTrace data. */
+    struct
+    {
+        /** Provider ID. */
+        uintptr_t               idProvider;
+        /** The number of trace points provided. */
+        uint32_t volatile       cProvidedProbes;
+        /** Whether we've invalidated this bugger. */
+        bool                    fZombie;
+    } DTrace;
+} SUPDRVTRACERDATA;
+/** Pointer to the tracer data associated with a provider. */
+typedef SUPDRVTRACERDATA *PSUPDRVTRACERDATA;
+
+/**
+ * Probe location info for ring-0.
+ *
+ * Since we cannot trust user tracepoint modules, we need to duplicate the probe
+ * ID and enabled flag in ring-0.
+ */
+typedef struct SUPDRVPROBELOC
+{
+    /** The probe ID. */
+    uint32_t                idProbe;
+    /** Whether it's enabled or not. */
+    bool                    fEnabled;
+} SUPDRVPROBELOC;
+/** Pointer to a ring-0 probe location record. */
+typedef SUPDRVPROBELOC *PSUPDRVPROBELOC;
+
+/**
+ * Probe info for ring-0.
+ *
+ * Since we cannot trust user tracepoint modules, we need to duplicate the
+ * probe enable count.
+ */
+typedef struct SUPDRVPROBEINFO
+{
+    /** The number of times this probe has been enabled. */
+    uint32_t volatile           cEnabled;
+} SUPDRVPROBEINFO;
+/** Pointer to a ring-0 probe info record. */
+typedef SUPDRVPROBEINFO *PSUPDRVPROBEINFO;
+
+/**
+ * Support driver tracepoint provider core.
+ */
+typedef struct SUPDRVVDTPROVIDERCORE
+{
+    /** The tracer data member. */
+    SUPDRVTRACERDATA            TracerData;
+    /** Pointer to the provider name (a copy that's always available). */
+    const char                 *pszName;
+    /** Pointer to the module name (a copy that's always available). */
+    const char                 *pszModName;
+
+    /** The provider descriptor. */
+    struct VTGDESCPROVIDER     *pDesc;
+    /** The VTG header. */
+    struct VTGOBJHDR           *pHdr;
+
+    /** The size of the entries in the pvProbeLocsEn table. */
+    uint8_t                     cbProbeLocsEn;
+    /** The actual module bit count (corresponds to cbProbeLocsEn). */
+    uint8_t                     cBits;
+    /** Set if this is a Umod, otherwise clear. */
+    bool                        fUmod;
+    /** Explicit alignment padding (paranoia). */
+    uint8_t                     abAlignment[ARCH_BITS == 32 ? 1 : 5];
+
+    /** The probe locations used for descriptive purposes. */
+    struct VTGPROBELOC const   *paProbeLocsRO;
+    /** Pointer to the probe location array where the enable flag needs
+     * flipping. For kernel providers, this will always be SUPDRVPROBELOC,
+     * while user providers can either be 32-bit or 64-bit.  Use
+     * cbProbeLocsEn to calculate the address of an entry. */
+    void                       *pvProbeLocsEn;
+    /** Pointer to the probe array containing the enabled counts. */
+    uint32_t                   *pacProbeEnabled;
+
+    /** The ring-0 probe location info for user tracepoint modules.
+     * This is NULL if fUmod is false. */
+    PSUPDRVPROBELOC             paR0ProbeLocs;
+    /** The ring-0 probe info for user tracepoint modules.
+     * This is NULL if fUmod is false. */
+    PSUPDRVPROBEINFO            paR0Probes;
+
+} SUPDRVVDTPROVIDERCORE;
+/** Pointer to a tracepoint provider core structure. */
+typedef SUPDRVVDTPROVIDERCORE *PSUPDRVVDTPROVIDERCORE;
+
+/** Pointer to a tracer registration record. */
+typedef struct SUPDRVTRACERREG const *PCSUPDRVTRACERREG;
+/**
+ * Support driver tracer registration record.
+ */
+typedef struct SUPDRVTRACERREG
+{
+    /** Magic value (SUPDRVTRACERREG_MAGIC). */
+    uint32_t                    u32Magic;
+    /** Version (SUPDRVTRACERREG_VERSION). */
+    uint32_t                    u32Version;
+
+    /**
+     * Fire off a kernel probe.
+     *
+     * @param   pVtgProbeLoc    The probe location record.
+     * @param   uArg0           The first raw probe argument.
+     * @param   uArg1           The second raw probe argument.
+     * @param   uArg2           The third raw probe argument.
+     * @param   uArg3           The fourth raw probe argument.
+     * @param   uArg4           The fifth raw probe argument.
+     *
+     * @remarks SUPR0TracerFireProbe will do a tail jump thru this member, so
+     *          no extra stack frames will be added.
+     * @remarks This does not take a 'this' pointer argument because it doesn't map
+     *          well onto VTG or DTrace.
+     *
+     */
+    DECLR0CALLBACKMEMBER(void, pfnProbeFireKernel, (struct VTGPROBELOC *pVtgProbeLoc, uintptr_t uArg0, uintptr_t uArg1, uintptr_t uArg2,
+                                                    uintptr_t uArg3, uintptr_t uArg4));
+
+    /**
+     * Fire off a user-mode probe.
+     *
+     * @param   pThis           Pointer to the registration record.
+     *
+     * @param   pVtgProbeLoc    The probe location record.
+     * @param   pSession        The user session.
+     * @param   pCtx            The usermode context info.
+     * @param   pVtgHdr         The VTG header (read-only).
+     * @param   pProbeLocRO     The read-only probe location record .
+     */
+    DECLR0CALLBACKMEMBER(void, pfnProbeFireUser, (PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, PCSUPDRVTRACERUSRCTX pCtx,
+                                                  struct VTGOBJHDR const *pVtgHdr, struct VTGPROBELOC const *pProbeLocRO));
+
+    /**
+     * Opens up the tracer.
+     *
+     * @returns VBox status code.
+     * @param   pThis           Pointer to the registration record.
+     * @param   pSession        The session doing the opening.
+     * @param   uCookie         A cookie (magic) unique to the tracer, so it can
+     *                          fend off incompatible clients.
+     * @param   uArg            Tracer specific argument.
+     * @param   puSessionData   Pointer to the session data variable.  This must be
+     *                          set to a non-zero value on success.
+     */
+    DECLR0CALLBACKMEMBER(int,   pfnTracerOpen, (PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, uint32_t uCookie, uintptr_t uArg,
+                                                uintptr_t *puSessionData));
+
+    /**
+     * I/O control style tracer communication method.
+     *
+     *
+     * @returns VBox status code.
+     * @param   pThis           Pointer to the registration record.
+     * @param   pSession        The session.
+     * @param   uSessionData    The session data value.
+     * @param   uCmd            The tracer specific command.
+     * @param   uArg            The tracer command specific argument.
+     * @param   piRetVal        The tracer specific return value.
+     */
+    DECLR0CALLBACKMEMBER(int,   pfnTracerIoCtl, (PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, uintptr_t uSessionData,
+                                                 uintptr_t uCmd, uintptr_t uArg, int32_t *piRetVal));
+
+    /**
+     * Cleans up data the tracer has associated with a session.
+     *
+     * @param   pThis           Pointer to the registration record.
+     * @param   pSession        The session handle.
+     * @param   uSessionData    The data assoicated with the session.
+     */
+    DECLR0CALLBACKMEMBER(void,  pfnTracerClose, (PCSUPDRVTRACERREG pThis, PSUPDRVSESSION pSession, uintptr_t uSessionData));
+
+    /**
+     * Registers a provider.
+     *
+     * @returns VBox status code.
+     * @param   pThis           Pointer to the registration record.
+     * @param   pCore           The provider core data.
+     *
+     * @todo Kernel vs. Userland providers.
+     */
+    DECLR0CALLBACKMEMBER(int,   pfnProviderRegister, (PCSUPDRVTRACERREG pThis, PSUPDRVVDTPROVIDERCORE pCore));
+
+    /**
+     * Attempts to deregisters a provider.
+     *
+     * @returns VINF_SUCCESS or VERR_TRY_AGAIN.  If the latter, the provider
+     *          should be made as harmless as possible before returning as the
+     *          VTG object and associated code will be unloaded upon return.
+     *
+     * @param   pThis           Pointer to the registration record.
+     * @param   pCore           The provider core data.
+     */
+    DECLR0CALLBACKMEMBER(int,   pfnProviderDeregister, (PCSUPDRVTRACERREG pThis, PSUPDRVVDTPROVIDERCORE pCore));
+
+    /**
+     * Make another attempt at unregister a busy provider.
+     *
+     * @returns VINF_SUCCESS or VERR_TRY_AGAIN.
+     * @param   pThis           Pointer to the registration record.
+     * @param   pCore           The provider core data.
+     */
+    DECLR0CALLBACKMEMBER(int,   pfnProviderDeregisterZombie, (PCSUPDRVTRACERREG pThis, PSUPDRVVDTPROVIDERCORE pCore));
+
+    /** End marker (SUPDRVTRACERREG_MAGIC). */
+    uintptr_t                   uEndMagic;
+} SUPDRVTRACERREG;
+
+/** Tracer magic (Kenny Garrett). */
+#define SUPDRVTRACERREG_MAGIC   UINT32_C(0x19601009)
+/** Tracer registration structure version. */
+#define SUPDRVTRACERREG_VERSION RT_MAKE_U32(0, 1)
+
+/** Pointer to a trace helper structure. */
+typedef struct SUPDRVTRACERHLP const *PCSUPDRVTRACERHLP;
+/**
+ * Helper structure.
+ */
+typedef struct SUPDRVTRACERHLP
+{
+    /** The structure version (SUPDRVTRACERHLP_VERSION). */
+    uintptr_t                   uVersion;
+
+    /** @todo ... */
+
+    /** End marker (SUPDRVTRACERHLP_VERSION) */
+    uintptr_t                   uEndVersion;
+} SUPDRVTRACERHLP;
+/** Tracer helper structure version. */
+#define SUPDRVTRACERHLP_VERSION RT_MAKE_U32(0, 1)
+
+SUPR0DECL(int)  SUPR0TracerRegisterImpl(void *hMod, PSUPDRVSESSION pSession, PCSUPDRVTRACERREG pReg, PCSUPDRVTRACERHLP *ppHlp);
+SUPR0DECL(int)  SUPR0TracerDeregisterImpl(void *hMod, PSUPDRVSESSION pSession);
+SUPR0DECL(int)  SUPR0TracerRegisterDrv(PSUPDRVSESSION pSession, struct VTGOBJHDR *pVtgHdr, const char *pszName);
+SUPR0DECL(void) SUPR0TracerDeregisterDrv(PSUPDRVSESSION pSession);
+SUPR0DECL(int)  SUPR0TracerRegisterModule(void *hMod, struct VTGOBJHDR *pVtgHdr);
+SUPR0DECL(void) SUPR0TracerFireProbe(struct VTGPROBELOC *pVtgProbeLoc, uintptr_t uArg0, uintptr_t uArg1, uintptr_t uArg2,
+                                     uintptr_t uArg3, uintptr_t uArg4);
+SUPR0DECL(void) SUPR0TracerUmodProbeFire(PSUPDRVSESSION pSession, PSUPDRVTRACERUSRCTX pCtx);
+/** @}  */
+
+
+/** @defgroup   grp_sup_r0_idc  The IDC Interface
+ * @{
+ */
+
+/** The current SUPDRV IDC version.
+ * This follows the usual high word / low word rules, i.e. high word is the
+ * major number and it signifies incompatible interface changes. */
+#define SUPDRV_IDC_VERSION      UINT32_C(0x00010000)
+
+/**
+ * Inter-Driver Communication Handle.
+ */
+typedef union SUPDRVIDCHANDLE
+{
+    /** Padding for opaque usage.
+     * Must be greater or equal in size than the private struct. */
+    void *apvPadding[4];
+#ifdef SUPDRVIDCHANDLEPRIVATE_DECLARED
+    /** The private view. */
+    struct SUPDRVIDCHANDLEPRIVATE s;
+#endif
+} SUPDRVIDCHANDLE;
+/** Pointer to a handle. */
+typedef SUPDRVIDCHANDLE *PSUPDRVIDCHANDLE;
+
+SUPR0DECL(int) SUPR0IdcOpen(PSUPDRVIDCHANDLE pHandle, uint32_t uReqVersion, uint32_t uMinVersion,
+                            uint32_t *puSessionVersion, uint32_t *puDriverVersion, uint32_t *puDriverRevision);
+SUPR0DECL(int) SUPR0IdcCall(PSUPDRVIDCHANDLE pHandle, uint32_t iReq, void *pvReq, uint32_t cbReq);
+SUPR0DECL(int) SUPR0IdcClose(PSUPDRVIDCHANDLE pHandle);
+SUPR0DECL(PSUPDRVSESSION) SUPR0IdcGetSession(PSUPDRVIDCHANDLE pHandle);
+SUPR0DECL(int) SUPR0IdcComponentRegisterFactory(PSUPDRVIDCHANDLE pHandle, PCSUPDRVFACTORY pFactory);
+SUPR0DECL(int) SUPR0IdcComponentDeregisterFactory(PSUPDRVIDCHANDLE pHandle, PCSUPDRVFACTORY pFactory);
+
+/** @} */
+
+/** @name Ring-0 module entry points.
+ *
+ * These can be exported by ring-0 modules SUP are told to load.
+ *
+ * @{ */
+DECLEXPORT(int)  ModuleInit(void *hMod);
+DECLEXPORT(void) ModuleTerm(void *hMod);
+/** @}  */
+
+
+/** @} */
+#endif
+
+
+/** @name Trust Anchors and Certificates
+ * @{ */
+
+/**
+ * Trust anchor table entry (in generated Certificates.cpp).
+ */
+typedef struct SUPTAENTRY
+{
+    /** Pointer to the raw bytes. */
+    const unsigned char    *pch;
+    /** Number of bytes. */
+    unsigned                cb;
+} SUPTAENTRY;
+/** Pointer to a trust anchor table entry. */
+typedef SUPTAENTRY const *PCSUPTAENTRY;
+
+/** Macro for simplifying generating the trust anchor tables. */
+#define SUPTAENTRY_GEN(a_abTA)      { &a_abTA[0], sizeof(a_abTA) }
+
+/** All certificates we know. */
+extern SUPTAENTRY const             g_aSUPAllTAs[];
+/** Number of entries in g_aSUPAllTAs. */
+extern unsigned const               g_cSUPAllTAs;
+
+/** Software publisher certificate roots (Authenticode). */
+extern SUPTAENTRY const             g_aSUPSpcRootTAs[];
+/** Number of entries in g_aSUPSpcRootTAs. */
+extern unsigned const               g_cSUPSpcRootTAs;
+
+/** Kernel root certificates used by Windows. */
+extern SUPTAENTRY const             g_aSUPNtKernelRootTAs[];
+/** Number of entries in g_aSUPNtKernelRootTAs. */
+extern unsigned const               g_cSUPNtKernelRootTAs;
+
+/** Timestamp root certificates trusted by Windows. */
+extern SUPTAENTRY const             g_aSUPTimestampTAs[];
+/** Number of entries in g_aSUPTimestampTAs. */
+extern unsigned const               g_cSUPTimestampTAs;
+
+/** Root certificates trusted by Apple code signing. */
+extern SUPTAENTRY const             g_aSUPAppleRootTAs[];
+/** Number of entries in g_cSUPAppleRootTAs. */
+extern unsigned const               g_cSUPAppleRootTAs;
+
+/** TAs we trust (the build certificate, Oracle VirtualBox). */
+extern SUPTAENTRY const             g_aSUPTrustedTAs[];
+/** Number of entries in g_aSUPTrustedTAs. */
+extern unsigned const               g_cSUPTrustedTAs;
+
+/** Supplemental certificates, like cross signing certificates. */
+extern SUPTAENTRY const             g_aSUPSupplementalTAs[];
+/** Number of entries in g_aSUPTrustedTAs. */
+extern unsigned const               g_cSUPSupplementalTAs;
+
+/** The build certificate. */
+extern const unsigned char          g_abSUPBuildCert[];
+/** The size of the build certificate. */
+extern const unsigned               g_cbSUPBuildCert;
+
+/** @} */
+
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_sup_h */
+