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|
/* $Id: DBGPlugInWinNt.cpp $ */
/** @file
* DBGPlugInWindows - Debugger and Guest OS Digger Plugin For Windows NT.
*/
/*
* Copyright (C) 2009-2022 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>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DBGF /// @todo add new log group.
#include "DBGPlugIns.h"
#include <VBox/vmm/dbgf.h>
#include <VBox/vmm/cpumctx.h>
#include <VBox/vmm/mm.h>
#ifdef VBOX_DEBUGGER_WITH_WIN_DBG_PRINT_HOOKING
# include <VBox/vmm/vmapi.h>
# include <VBox/dis.h>
#endif
#include <VBox/vmm/vmmr3vtable.h>
#include <VBox/err.h>
#include <VBox/param.h>
#include <iprt/ctype.h>
#include <iprt/ldr.h>
#include <iprt/mem.h>
#include <iprt/path.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/utf16.h>
#include <iprt/formats/pecoff.h>
#include <iprt/formats/mz.h>
#include <iprt/nt/nt-structures.h>
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/** @name Internal WinNT structures
* @{ */
/**
* PsLoadedModuleList entry for 32-bit NT aka LDR_DATA_TABLE_ENTRY.
* Tested with XP.
*/
typedef struct NTMTE32
{
struct
{
uint32_t Flink;
uint32_t Blink;
} InLoadOrderLinks,
InMemoryOrderModuleList,
InInitializationOrderModuleList;
uint32_t DllBase;
uint32_t EntryPoint;
/** @note This field is not a size in NT 3.1. It's NULL for images loaded by the
* boot loader, for other images it looks like some kind of pointer. */
uint32_t SizeOfImage;
struct
{
uint16_t Length;
uint16_t MaximumLength;
uint32_t Buffer;
} FullDllName,
BaseDllName;
uint32_t Flags;
uint16_t LoadCount;
uint16_t TlsIndex;
/* ... there is more ... */
} NTMTE32;
typedef NTMTE32 *PNTMTE32;
/**
* PsLoadedModuleList entry for 64-bit NT aka LDR_DATA_TABLE_ENTRY.
*/
typedef struct NTMTE64
{
struct
{
uint64_t Flink;
uint64_t Blink;
} InLoadOrderLinks, /**< 0x00 */
InMemoryOrderModuleList, /**< 0x10 */
InInitializationOrderModuleList; /**< 0x20 */
uint64_t DllBase; /**< 0x30 */
uint64_t EntryPoint; /**< 0x38 */
uint32_t SizeOfImage; /**< 0x40 */
uint32_t Alignment; /**< 0x44 */
struct
{
uint16_t Length; /**< 0x48,0x58 */
uint16_t MaximumLength; /**< 0x4a,0x5a */
uint32_t Alignment; /**< 0x4c,0x5c */
uint64_t Buffer; /**< 0x50,0x60 */
} FullDllName, /**< 0x48 */
BaseDllName; /**< 0x58 */
uint32_t Flags; /**< 0x68 */
uint16_t LoadCount; /**< 0x6c */
uint16_t TlsIndex; /**< 0x6e */
/* ... there is more ... */
} NTMTE64;
typedef NTMTE64 *PNTMTE64;
/** MTE union. */
typedef union NTMTE
{
NTMTE32 vX_32;
NTMTE64 vX_64;
} NTMTE;
typedef NTMTE *PNTMTE;
/**
* The essential bits of the KUSER_SHARED_DATA structure.
*/
typedef struct NTKUSERSHAREDDATA
{
uint32_t TickCountLowDeprecated;
uint32_t TickCountMultiplier;
struct
{
uint32_t LowPart;
int32_t High1Time;
int32_t High2Time;
} InterruptTime,
SystemTime,
TimeZoneBias;
uint16_t ImageNumberLow;
uint16_t ImageNumberHigh;
RTUTF16 NtSystemRoot[260];
uint32_t MaxStackTraceDepth;
uint32_t CryptoExponent;
uint32_t TimeZoneId;
uint32_t LargePageMinimum;
uint32_t Reserved2[6];
uint32_t NtBuildNumber;
uint32_t NtProductType;
uint8_t ProductTypeIsValid;
uint8_t abPadding[3];
uint32_t NtMajorVersion;
uint32_t NtMinorVersion;
/* uint8_t ProcessorFeatures[64];
...
*/
} NTKUSERSHAREDDATA;
typedef NTKUSERSHAREDDATA *PNTKUSERSHAREDDATA;
/** KI_USER_SHARED_DATA for i386 */
#define NTKUSERSHAREDDATA_WINNT32 UINT32_C(0xffdf0000)
/** KI_USER_SHARED_DATA for AMD64 */
#define NTKUSERSHAREDDATA_WINNT64 UINT64_C(0xfffff78000000000)
/** NTKUSERSHAREDDATA::NtProductType */
typedef enum NTPRODUCTTYPE
{
kNtProductType_Invalid = 0,
kNtProductType_WinNt = 1,
kNtProductType_LanManNt,
kNtProductType_Server
} NTPRODUCTTYPE;
/** NT image header union. */
typedef union NTHDRSU
{
IMAGE_NT_HEADERS32 vX_32;
IMAGE_NT_HEADERS64 vX_64;
} NTHDRS;
/** Pointer to NT image header union. */
typedef NTHDRS *PNTHDRS;
/** Pointer to const NT image header union. */
typedef NTHDRS const *PCNTHDRS;
/**
* NT KD version block.
*/
typedef struct NTKDVERSIONBLOCK
{
uint16_t MajorVersion;
uint16_t MinorVersion;
uint8_t ProtocolVersion;
uint8_t KdSecondaryVersion;
uint16_t Flags;
uint16_t MachineType;
uint8_t MaxPacketType;
uint8_t MaxStateChange;
uint8_t MaxManipulate;
uint8_t Simulation;
uint16_t Unused;
uint64_t KernBase;
uint64_t PsLoadedModuleList;
uint64_t DebuggerDataList;
} NTKDVERSIONBLOCK;
/** Pointer to an NT KD version block. */
typedef NTKDVERSIONBLOCK *PNTKDVERSIONBLOCK;
/** Pointer to a const NT KD version block. */
typedef const NTKDVERSIONBLOCK *PCNTKDVERSIONBLOCK;
/** @} */
typedef enum DBGDIGGERWINNTVER
{
DBGDIGGERWINNTVER_UNKNOWN,
DBGDIGGERWINNTVER_3_1,
DBGDIGGERWINNTVER_3_5,
DBGDIGGERWINNTVER_4_0,
DBGDIGGERWINNTVER_5_0,
DBGDIGGERWINNTVER_5_1,
DBGDIGGERWINNTVER_6_0
} DBGDIGGERWINNTVER;
/**
* WinNT guest OS digger instance data.
*/
typedef struct DBGDIGGERWINNT
{
/** Whether the information is valid or not.
* (For fending off illegal interface method calls.) */
bool fValid;
/** 32-bit (true) or 64-bit (false) */
bool f32Bit;
/** Set if NT 3.1 was detected.
* This implies both Misc.VirtualSize and NTMTE32::SizeOfImage are zero. */
bool fNt31;
/** The NT version. */
DBGDIGGERWINNTVER enmVer;
/** NTKUSERSHAREDDATA::NtProductType */
NTPRODUCTTYPE NtProductType;
/** NTKUSERSHAREDDATA::NtMajorVersion */
uint32_t NtMajorVersion;
/** NTKUSERSHAREDDATA::NtMinorVersion */
uint32_t NtMinorVersion;
/** NTKUSERSHAREDDATA::NtBuildNumber */
uint32_t NtBuildNumber;
/** The address of the ntoskrnl.exe image. */
DBGFADDRESS KernelAddr;
/** The address of the ntoskrnl.exe module table entry. */
DBGFADDRESS KernelMteAddr;
/** The address of PsLoadedModuleList. */
DBGFADDRESS PsLoadedModuleListAddr;
/** Array of detected KPCR addresses for each vCPU. */
PDBGFADDRESS paKpcrAddr;
/** Array of detected KPCRB addresses for each vCPU. */
PDBGFADDRESS paKpcrbAddr;
/** The Windows NT specifics interface. */
DBGFOSIWINNT IWinNt;
#ifdef VBOX_DEBUGGER_WITH_WIN_DBG_PRINT_HOOKING
/** Breakpoint owner handle for the DbgPrint/vDbgPrint{,Ex}... interception. */
DBGFBPOWNER hBpOwnerDbgPrint;
/** Breakpoint handle for the DbgPrint/vDbgPrint{,Ex}... interception. */
DBGFBP hBpDbgPrint;
#endif
} DBGDIGGERWINNT;
/** Pointer to the linux guest OS digger instance data. */
typedef DBGDIGGERWINNT *PDBGDIGGERWINNT;
/**
* The WinNT digger's loader reader instance data.
*/
typedef struct DBGDIGGERWINNTRDR
{
/** The VM handle (referenced). */
PUVM pUVM;
/** The image base. */
DBGFADDRESS ImageAddr;
/** The image size. */
uint32_t cbImage;
/** The file offset of the SizeOfImage field in the optional header if it
* needs patching, otherwise set to UINT32_MAX. */
uint32_t offSizeOfImage;
/** The correct image size. */
uint32_t cbCorrectImageSize;
/** Number of entries in the aMappings table. */
uint32_t cMappings;
/** Mapping hint. */
uint32_t iHint;
/** Mapping file offset to memory offsets, ordered by file offset. */
struct
{
/** The file offset. */
uint32_t offFile;
/** The size of this mapping. */
uint32_t cbMem;
/** The offset to the memory from the start of the image. */
uint32_t offMem;
} aMappings[1];
} DBGDIGGERWINNTRDR;
/** Pointer a WinNT loader reader instance data. */
typedef DBGDIGGERWINNTRDR *PDBGDIGGERWINNTRDR;
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/** Validates a 32-bit Windows NT kernel address */
#define WINNT32_VALID_ADDRESS(Addr) ((Addr) > UINT32_C(0x80000000) && (Addr) < UINT32_C(0xfffff000))
/** Validates a 64-bit Windows NT kernel address */
#define WINNT64_VALID_ADDRESS(Addr) ((Addr) > UINT64_C(0xffff800000000000) && (Addr) < UINT64_C(0xfffffffffffff000))
/** Validates a kernel address. */
#define WINNT_VALID_ADDRESS(pThis, Addr) ((pThis)->f32Bit ? WINNT32_VALID_ADDRESS(Addr) : WINNT64_VALID_ADDRESS(Addr))
/** Versioned and bitness wrapper. */
#define WINNT_UNION(pThis, pUnion, Member) ((pThis)->f32Bit ? (pUnion)->vX_32. Member : (pUnion)->vX_64. Member )
/** The length (in chars) of the kernel file name (no path). */
#define WINNT_KERNEL_BASE_NAME_LEN 12
/** WindowsNT on little endian ASCII systems. */
#define DIG_WINNT_MOD_TAG UINT64_C(0x54696e646f774e54)
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
static DECLCALLBACK(int) dbgDiggerWinNtInit(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData);
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** Kernel names. */
static const RTUTF16 g_wszKernelNames[][WINNT_KERNEL_BASE_NAME_LEN + 1] =
{
{ 'n', 't', 'o', 's', 'k', 'r', 'n', 'l', '.', 'e', 'x', 'e' }
};
#ifdef VBOX_DEBUGGER_WITH_WIN_DBG_PRINT_HOOKING
/**
* Queries the string from guest memory with the pointer in the given register, sanitizing it.
*
* @returns VBox status code.
* @param pUVM The user mode VM handle.
* @param idCpu The CPU ID.
* @param enmReg The register to query the string pointer from.
* @param pszBuf Where to store the sanitized string.
* @param cbBuf Size of the buffer in number of bytes.
*/
static int dbgDiggerWinNtDbgPrintQueryStringFromReg(PUVM pUVM, VMCPUID idCpu, DBGFREG enmReg, char *pszBuf, size_t cbBuf)
{
uint64_t u64RegPtr = 0;
int rc = DBGFR3RegCpuQueryU64(pUVM, idCpu, enmReg, &u64RegPtr);
if ( rc == VINF_SUCCESS
|| rc == VINF_DBGF_ZERO_EXTENDED_REGISTER) /* Being strict about what we expect here. */
{
DBGFADDRESS AddrStr;
DBGFR3AddrFromFlat(pUVM, &AddrStr, u64RegPtr);
rc = DBGFR3MemRead(pUVM, idCpu, &AddrStr, pszBuf, cbBuf);
if (RT_SUCCESS(rc))
{
/* Check that there is a zero terminator and purge invalid encoding (expecting UTF-8 here). */
size_t idx = 0;
for (idx = 0; idx < cbBuf; idx++)
if (pszBuf[idx] == '\0')
break;
if (idx == cbBuf)
pszBuf[cbBuf - 1] = '\0'; /* Force terminator, truncating the string. */
else
memset(&pszBuf[idx], 0, cbBuf - idx); /* Clear everything afterwards. */
/* Purge the string encoding. */
RTStrPurgeEncoding(pszBuf);
}
}
else if (RT_SUCCESS(rc))
rc = VERR_INVALID_STATE;
return rc;
}
/**
* @copydoc{FNDBGFBPHIT, Breakpoint callback for the DbgPrint interception.}
*/
static DECLCALLBACK(VBOXSTRICTRC) dbgDiggerWinNtDbgPrintHit(PVM pVM, VMCPUID idCpu, void *pvUserBp, DBGFBP hBp, PCDBGFBPPUB pBpPub, uint16_t fFlags)
{
RT_NOREF(hBp, pBpPub, fFlags);
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvUserBp;
PUVM pUVM = VMR3GetUVM(pVM);
/*
* The worker prototype looks like the following:
* vDbgPrintExWorker(PCCH Prefix, ULONG ComponentId, ULONG Level, PCCH Format, va_list arglist, BOOL fUnknown)
*
* Depending on the bitness the parameters are grabbed from the appropriate registers and stack locations.
* For amd64 reading the following is recommended:
* https://docs.microsoft.com/en-us/cpp/build/x64-calling-convention?view=vs-2019
* https://docs.microsoft.com/en-us/cpp/build/prolog-and-epilog?view=vs-2019
* https://docs.microsoft.com/en-us/cpp/build/stack-usage?view=vs-2019
*
* @todo 32bit
*/
int rc = VINF_SUCCESS;
uint32_t idComponent = 0;
uint32_t iLevel = 0;
char aszPrefixStr[128]; /* Restricted size. */
char aszFmtStr[_1K]; /* Restricted size. */
DBGFADDRESS AddrVaList;
if (!pThis->f32Bit)
{
/*
* Grab the prefix, component, level, format string pointer from the registers and the argument list from the
* stack (mind the home area for the register arguments).
*/
rc = dbgDiggerWinNtDbgPrintQueryStringFromReg(pUVM, idCpu, DBGFREG_RCX, &aszPrefixStr[0], sizeof(aszPrefixStr));
if (RT_SUCCESS(rc))
rc = DBGFR3RegCpuQueryU32(pUVM, idCpu, DBGFREG_RDX, &idComponent);
if (RT_SUCCESS(rc))
rc = DBGFR3RegCpuQueryU32(pUVM, idCpu, DBGFREG_R8, &iLevel);
if (RT_SUCCESS(rc))
rc = dbgDiggerWinNtDbgPrintQueryStringFromReg(pUVM, idCpu, DBGFREG_R9, &aszFmtStr[0], sizeof(aszFmtStr));
if (RT_SUCCESS(rc))
{
/* Grabbing the pointer to the va list. The stack layout when we are here looks like (each entry is 64bit):
* +-------------+
* | ... |
* | VA list ptr |
* | (arg3/r9) |
* | (arg2/r8) |
* | (arg1/rdx) |
* | (arg0/rcx) |
* | return RIP |
* +-------------+ <- RSP
*/
uint64_t uRegRsp = 0;
rc = DBGFR3RegCpuQueryU64(pUVM, idCpu, DBGFREG_RSP, &uRegRsp);
if (rc == VINF_SUCCESS)
{
DBGFADDRESS AddrVaListPtr;
RTGCUINTPTR GCPtrVaList = 0;
DBGFR3AddrFromFlat(pUVM, &AddrVaListPtr, uRegRsp + 5 * sizeof(RTGCUINTPTR));
rc = DBGFR3MemRead(pUVM, idCpu, &AddrVaListPtr, &GCPtrVaList, sizeof(GCPtrVaList));
if (RT_SUCCESS(rc))
DBGFR3AddrFromFlat(pUVM, &AddrVaList, GCPtrVaList);
}
else
rc = VERR_INVALID_STATE;
}
}
else
rc = VERR_NOT_IMPLEMENTED; /** @todo */
if (RT_SUCCESS(rc))
{
LogRel(("DigWinNt/DbgPrint: Queried arguments %s %#x %u %s %RGv\n", &aszPrefixStr[0], idComponent, iLevel, &aszFmtStr[0], AddrVaList.FlatPtr));
/** @todo Continue here. */
}
else
LogRel(("DigWinNt/DbgPrint: Failed to query all arguments with rc=%Rrc\n", rc));
return VINF_SUCCESS;
}
/**
* Disassembles the given instruction and checks whether it is a call with a fixed address.
*
* @returns Flag whether the insturction at the given address is a call.
* @param pThis The instance data.
* @param pUVM The user mode VM handle.
* @param pAddrInsn Guest address of the instruction.
* @param pAddrCall Where to store the destination if the instruction is a call.
*/
static bool dbgDiggerWinNtDbgPrintWrapperInsnIsCall(PDBGDIGGERWINNT pThis, PUVM pUVM, PCDBGFADDRESS pAddrInsn, PDBGFADDRESS pAddrCall)
{
DISSTATE DisState;
RT_ZERO(DisState);
/* Prefetch the instruction. */
uint8_t abInstr[32];
int rc = DBGFR3MemRead(pUVM, 0 /*idCpu*/, pAddrInsn, &abInstr[0], sizeof(abInstr));
if (RT_SUCCESS(rc))
{
uint32_t cbInsn = 0;
rc = DISInstr(&abInstr[0], pThis->f32Bit ? DISCPUMODE_32BIT : DISCPUMODE_64BIT, &DisState, &cbInsn);
if ( RT_SUCCESS(rc)
&& DisState.pCurInstr->uOpcode == OP_CALL
&& DisState.Param1.fUse & DISUSE_IMMEDIATE)
{
if (DisState.Param1.fUse & (DISUSE_IMMEDIATE32 | DISUSE_IMMEDIATE64))
DBGFR3AddrFromFlat(pUVM, pAddrCall, DisState.Param1.uValue);
else if (DisState.Param1.fUse & (DISUSE_IMMEDIATE32_REL | DISUSE_IMMEDIATE64_REL))
{
*pAddrCall = *pAddrInsn;
DBGFR3AddrAdd(pAddrCall, DisState.Param1.uValue + cbInsn);
}
return true;
}
}
return false;
}
/**
* Tries to find the single call instruction of the DbgPrint/etc. worker in the given control flow graph
* (single basic block assumed).
*
* @returns VBox status code.
* @param pThis The instance data.
* @param pUVM The user mode VM handle.
* @param hFlow The control flow graph handle.
* @param pAddr Where to store the worker address on success.
*/
static int dbgDiggerWinNtDbgPrintResolveWorker(PDBGDIGGERWINNT pThis, PUVM pUVM, DBGFFLOW hFlow, PDBGFADDRESS pAddr)
{
DBGFFLOWBB hBb;
int rc = DBGFR3FlowQueryStartBb(hFlow, &hBb);
if (RT_SUCCESS(rc))
{
bool fCallFound = false;
for (uint32_t i = 0; i < DBGFR3FlowBbGetInstrCount(hBb) && RT_SUCCESS(rc); i++)
{
DBGFADDRESS AddrInsn;
uint32_t cbInsn;
rc = DBGFR3FlowBbQueryInstr(hBb, i, &AddrInsn, &cbInsn, NULL);
if (RT_SUCCESS(rc))
{
DBGFADDRESS AddrCall;
if (dbgDiggerWinNtDbgPrintWrapperInsnIsCall(pThis, pUVM, &AddrInsn, &AddrCall))
{
if (!fCallFound)
{
*pAddr = AddrCall;
fCallFound = true;
}
else
{
LogRel(("DigWinNt/DbgPrint: nt!vDbgPrintEx contains multiple call instructions!\n"));
rc = VERR_ALREADY_EXISTS;
}
}
}
}
DBGFR3FlowBbRelease(hBb);
}
return rc;
}
/**
* Tries to resolve and hook into the worker for all the DbgPrint like wrappers to be able
* to gather debug information from the system.
*
* @returns nothing.
* @param pThis The instance data.
* @param pUVM The user mode VM handle.
*/
static void dbgDiggerWinNtDbgPrintHook(PDBGDIGGERWINNT pThis, PUVM pUVM)
{
/*
* This is a multi step process:
* 1. Try to resolve the address of vDbgPrint() (available since XP).
* 2. Create a control flow graph from the code and verify the following assumptions:
* 1. Only a single basic block.
* 2. Just one call instruction.
* @todo More?
* 3. Get the address from the called worker
* 4. Set a hardware breakpoint with our callback.
*/
RTDBGAS hAs = DBGFR3AsResolveAndRetain(pUVM, DBGF_AS_KERNEL);
if (hAs != NIL_RTDBGAS)
{
RTDBGSYMBOL SymInfo;
int rc = RTDbgAsSymbolByName(hAs, "nt!vDbgPrintEx", &SymInfo, NULL /*phMod*/);
if (RT_SUCCESS(rc))
{
DBGFADDRESS Addr;
DBGFR3AddrFromFlat(pUVM, &Addr, (RTGCPTR)SymInfo.Value);
LogRel(("DigWinNt/DbgPrint: nt!vDbgPrintEx resolved to %RGv\n", SymInfo.Value));
DBGFFLOW hCfg;
rc = DBGFR3FlowCreate(pUVM, 0 /*idCpu*/, &Addr, 512 /*cbDisasmMax*/,
0 /*fFlagsFlow*/, DBGF_DISAS_FLAGS_UNPATCHED_BYTES | DBGF_DISAS_FLAGS_ANNOTATE_PATCHED | DBGF_DISAS_FLAGS_DEFAULT_MODE,
&hCfg);
if (RT_SUCCESS(rc))
{
/* Verify assumptions. */
if (DBGFR3FlowGetBbCount(hCfg) == 1)
{
rc = dbgDiggerWinNtDbgPrintResolveWorker(pThis, pUVM, hCfg, &Addr);
if (RT_SUCCESS(rc))
{
/* Try to hook the worker. */
LogRel(("DigWinNt/DbgPrint: Worker for nt!vDbgPrintEx resolved to %RGv\n", Addr.FlatPtr));
rc = DBGFR3BpOwnerCreate(pUVM, dbgDiggerWinNtDbgPrintHit, NULL /*pfnBpIoHit*/, &pThis->hBpOwnerDbgPrint);
if (RT_SUCCESS(rc))
{
rc = DBGFR3BpSetInt3Ex(pUVM, pThis->hBpOwnerDbgPrint, pThis, 0 /*idCpu*/, &Addr, DBGF_BP_F_DEFAULT,
0 /*iHitTrigger*/, 0 /*iHitDisable*/, &pThis->hBpDbgPrint);
if (RT_SUCCESS(rc))
LogRel(("DigWinNt/DbgPrint: Hooked nt!vDbgPrintEx worker hBp=%#x\n", pThis->hBpDbgPrint));
else
{
LogRel(("DigWinNt/DbgPrint: Setting hardware breakpoint for nt!vDbgPrintEx worker failed with rc=%Rrc\n", rc));
int rc2 = DBGFR3BpOwnerDestroy(pUVM, pThis->hBpOwnerDbgPrint);
pThis->hBpOwnerDbgPrint = NIL_DBGFBPOWNER;
AssertRC(rc2);
}
}
}
/* else LogRel() already done */
}
else
LogRel(("DigWinNt/DbgPrint: Control flow graph for nt!vDbgPrintEx has more than one basic block (%u)\n",
DBGFR3FlowGetBbCount(hCfg)));
DBGFR3FlowRelease(hCfg);
}
else
LogRel(("DigWinNt/DbgPrint: Failed to create control flow graph from nt!vDbgPrintEx rc=%Rrc\n", rc));
}
else
LogRel(("DigWinNt/DbgPrint: Failed to resolve nt!vDbgPrintEx -> rc=%Rrc\n", rc));
RTDbgAsRelease(hAs);
}
else
LogRel(("DigWinNt/DbgPrint: Failed to resolve kernel address space handle\n"));
}
#endif
/**
* Tries to resolve the KPCR and KPCRB addresses for each vCPU.
*
* @returns nothing.
* @param pThis The instance data.
* @param pUVM The user mode VM handle.
* @param pVMM The VMM function table.
*/
static void dbgDiggerWinNtResolveKpcr(PDBGDIGGERWINNT pThis, PUVM pUVM, PCVMMR3VTABLE pVMM)
{
/*
* Getting at the KPCR and KPCRB is explained here:
* https://www.geoffchappell.com/studies/windows/km/ntoskrnl/structs/kpcr.htm
* Together with the available offsets from:
* https://github.com/tpn/winsdk-10/blob/master/Include/10.0.16299.0/shared/ksamd64.inc#L883
* we can verify that the found addresses are valid by cross checking that the GDTR and self reference
* match what we expect.
*/
VMCPUID cCpus = pVMM->pfnDBGFR3CpuGetCount(pUVM);
pThis->paKpcrAddr = (PDBGFADDRESS)RTMemAllocZ(cCpus * 2 * sizeof(DBGFADDRESS));
if (RT_LIKELY(pThis->paKpcrAddr))
{
pThis->paKpcrbAddr = &pThis->paKpcrAddr[cCpus];
/* Work each CPU, unexpected values in each CPU make the whole thing fail to play safe. */
int rc = VINF_SUCCESS;
for (VMCPUID idCpu = 0; (idCpu < cCpus) && RT_SUCCESS(rc); idCpu++)
{
PDBGFADDRESS pKpcrAddr = &pThis->paKpcrAddr[idCpu];
PDBGFADDRESS pKpcrbAddr = &pThis->paKpcrbAddr[idCpu];
if (pThis->f32Bit)
{
/* Read FS base */
uint32_t GCPtrKpcrBase = 0;
rc = pVMM->pfnDBGFR3RegCpuQueryU32(pUVM, idCpu, DBGFREG_FS_BASE, &GCPtrKpcrBase);
if ( RT_SUCCESS(rc)
&& WINNT32_VALID_ADDRESS(GCPtrKpcrBase))
{
/*
* Read the start of the KPCR (@todo Probably move this to a global header)
* and verify its content.
*/
struct
{
uint8_t abOoi[28]; /* Out of interest */
uint32_t GCPtrSelf;
uint32_t GCPtrCurrentPrcb;
uint32_t u32Irql;
uint32_t u32Iir;
uint32_t u32IirActive;
uint32_t u32Idr;
uint32_t GCPtrKdVersionBlock;
uint32_t GCPtrIdt;
uint32_t GCPtrGdt;
uint32_t GCPtrTss;
} Kpcr;
LogFlow(("DigWinNt/KPCR[%u]: GS Base %RGv\n", idCpu, GCPtrKpcrBase));
pVMM->pfnDBGFR3AddrFromFlat(pUVM, pKpcrAddr, GCPtrKpcrBase);
rc = pVMM->pfnDBGFR3MemRead(pUVM, idCpu, pKpcrAddr, &Kpcr, sizeof(Kpcr));
if (RT_SUCCESS(rc))
{
uint32_t GCPtrGdt = 0;
uint32_t GCPtrIdt = 0;
rc = pVMM->pfnDBGFR3RegCpuQueryU32(pUVM, idCpu, DBGFREG_GDTR_BASE, &GCPtrGdt);
if (RT_SUCCESS(rc))
rc = pVMM->pfnDBGFR3RegCpuQueryU32(pUVM, idCpu, DBGFREG_IDTR_BASE, &GCPtrIdt);
if (RT_SUCCESS(rc))
{
if ( Kpcr.GCPtrGdt == GCPtrGdt
&& Kpcr.GCPtrIdt == GCPtrIdt
&& Kpcr.GCPtrSelf == pKpcrAddr->FlatPtr)
{
pVMM->pfnDBGFR3AddrFromFlat(pUVM, pKpcrbAddr, Kpcr.GCPtrCurrentPrcb);
LogRel(("DigWinNt/KPCR[%u]: KPCR=%RGv KPCRB=%RGv\n", idCpu, pKpcrAddr->FlatPtr, pKpcrbAddr->FlatPtr));
/*
* Try to extract the NT build number from the KD version block if it exists,
* the shared user data might have set it to 0.
*
* @todo We can use this method to get at the kern base and loaded module list if the other detection
* method fails (seen with Windows 10 x86).
* @todo On 32bit Windows the debugger data list is also always accessible this way contrary to
* the amd64 version where it is only available with "/debug on" set.
*/
if (!pThis->NtBuildNumber)
{
NTKDVERSIONBLOCK KdVersBlock;
DBGFADDRESS AddrKdVersBlock;
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &AddrKdVersBlock, Kpcr.GCPtrKdVersionBlock);
rc = pVMM->pfnDBGFR3MemRead(pUVM, idCpu, &AddrKdVersBlock, &KdVersBlock, sizeof(KdVersBlock));
if (RT_SUCCESS(rc))
pThis->NtBuildNumber = KdVersBlock.MinorVersion;
}
}
else
LogRel(("DigWinNt/KPCR[%u]: KPCR validation error GDT=(%RGv vs %RGv) KPCR=(%RGv vs %RGv)\n", idCpu,
Kpcr.GCPtrGdt, GCPtrGdt, Kpcr.GCPtrSelf, pKpcrAddr->FlatPtr));
}
else
LogRel(("DigWinNt/KPCR[%u]: Getting GDT or IDT base register failed with %Rrc\n", idCpu, rc));
}
}
else
LogRel(("DigWinNt/KPCR[%u]: Getting FS base register failed with %Rrc (%RGv)\n", idCpu, rc, GCPtrKpcrBase));
}
else
{
/* Read GS base which points to the base of the KPCR for each CPU. */
RTGCUINTPTR GCPtrTmp = 0;
rc = pVMM->pfnDBGFR3RegCpuQueryU64(pUVM, idCpu, DBGFREG_GS_BASE, &GCPtrTmp);
if ( RT_SUCCESS(rc)
&& !WINNT64_VALID_ADDRESS(GCPtrTmp))
{
/*
* Could be a user address when we stopped the VM right in usermode,
* read the GS kernel base MSR instead.
*/
rc = pVMM->pfnDBGFR3RegCpuQueryU64(pUVM, idCpu, DBGFREG_MSR_K8_KERNEL_GS_BASE, &GCPtrTmp);
}
if ( RT_SUCCESS(rc)
&& WINNT64_VALID_ADDRESS(GCPtrTmp))
{
LogFlow(("DigWinNt/KPCR[%u]: GS Base %RGv\n", idCpu, GCPtrTmp));
pVMM->pfnDBGFR3AddrFromFlat(pUVM, pKpcrAddr, GCPtrTmp);
rc = pVMM->pfnDBGFR3RegCpuQueryU64(pUVM, idCpu, DBGFREG_GDTR_BASE, &GCPtrTmp);
if (RT_SUCCESS(rc))
{
/*
* Read the start of the KPCR (@todo Probably move this to a global header)
* and verify its content.
*/
struct
{
RTGCUINTPTR GCPtrGdt;
RTGCUINTPTR GCPtrTss;
RTGCUINTPTR GCPtrUserRsp;
RTGCUINTPTR GCPtrSelf;
RTGCUINTPTR GCPtrCurrentPrcb;
} Kpcr;
rc = pVMM->pfnDBGFR3MemRead(pUVM, idCpu, pKpcrAddr, &Kpcr, sizeof(Kpcr));
if (RT_SUCCESS(rc))
{
if ( Kpcr.GCPtrGdt == GCPtrTmp
&& Kpcr.GCPtrSelf == pKpcrAddr->FlatPtr
/** @todo && TSS */ )
{
pVMM->pfnDBGFR3AddrFromFlat(pUVM, pKpcrbAddr, Kpcr.GCPtrCurrentPrcb);
LogRel(("DigWinNt/KPCR[%u]: KPCR=%RGv KPCRB=%RGv\n", idCpu, pKpcrAddr->FlatPtr, pKpcrbAddr->FlatPtr));
}
else
LogRel(("DigWinNt/KPCR[%u]: KPCR validation error GDT=(%RGv vs %RGv) KPCR=(%RGv vs %RGv)\n", idCpu,
Kpcr.GCPtrGdt, GCPtrTmp, Kpcr.GCPtrSelf, pKpcrAddr->FlatPtr));
}
else
LogRel(("DigWinNt/KPCR[%u]: Reading KPCR start at %RGv failed with %Rrc\n", idCpu, pKpcrAddr->FlatPtr, rc));
}
else
LogRel(("DigWinNt/KPCR[%u]: Getting GDT base register failed with %Rrc\n", idCpu, rc));
}
else
LogRel(("DigWinNt/KPCR[%u]: Getting GS base register failed with %Rrc\n", idCpu, rc));
}
}
if (RT_FAILURE(rc))
{
LogRel(("DigWinNt/KPCR: Failed to detmine KPCR and KPCRB rc=%Rrc\n", rc));
RTMemFree(pThis->paKpcrAddr);
pThis->paKpcrAddr = NULL;
pThis->paKpcrbAddr = NULL;
}
}
else
LogRel(("DigWinNt/KPCR: Failed to allocate %u entries for the KPCR/KPCRB addresses\n", cCpus * 2));
}
/**
* Process a PE image found in guest memory.
*
* @param pThis The instance data.
* @param pUVM The user mode VM handle.
* @param pVMM The VMM function table.
* @param pszName The module name.
* @param pszFilename The image filename.
* @param pImageAddr The image address.
* @param cbImage The size of the image.
*/
static void dbgDiggerWinNtProcessImage(PDBGDIGGERWINNT pThis, PUVM pUVM, PCVMMR3VTABLE pVMM, const char *pszName,
const char *pszFilename, PCDBGFADDRESS pImageAddr, uint32_t cbImage)
{
LogFlow(("DigWinNt: %RGp %#x %s\n", pImageAddr->FlatPtr, cbImage, pszName));
/*
* Do some basic validation first.
*/
if ( (cbImage < sizeof(IMAGE_NT_HEADERS64) && !pThis->fNt31)
|| cbImage >= _1M * 256)
{
Log(("DigWinNt: %s: Bad image size: %#x\n", pszName, cbImage));
return;
}
/*
* Use the common in-memory module reader to create a debug module.
*/
RTERRINFOSTATIC ErrInfo;
RTDBGMOD hDbgMod = NIL_RTDBGMOD;
int rc = pVMM->pfnDBGFR3ModInMem(pUVM, pImageAddr, pThis->fNt31 ? DBGFMODINMEM_F_PE_NT31 : 0, pszName, pszFilename,
pThis->f32Bit ? RTLDRARCH_X86_32 : RTLDRARCH_AMD64, cbImage,
&hDbgMod, RTErrInfoInitStatic(&ErrInfo));
if (RT_SUCCESS(rc))
{
/*
* Tag the module.
*/
rc = RTDbgModSetTag(hDbgMod, DIG_WINNT_MOD_TAG);
AssertRC(rc);
/*
* Link the module.
*/
RTDBGAS hAs = pVMM->pfnDBGFR3AsResolveAndRetain(pUVM, DBGF_AS_KERNEL);
if (hAs != NIL_RTDBGAS)
rc = RTDbgAsModuleLink(hAs, hDbgMod, pImageAddr->FlatPtr, RTDBGASLINK_FLAGS_REPLACE /*fFlags*/);
else
rc = VERR_INTERNAL_ERROR;
RTDbgModRelease(hDbgMod);
RTDbgAsRelease(hAs);
}
else if (RTErrInfoIsSet(&ErrInfo.Core))
Log(("DigWinNt: %s: DBGFR3ModInMem failed: %Rrc - %s\n", pszName, rc, ErrInfo.Core.pszMsg));
else
Log(("DigWinNt: %s: DBGFR3ModInMem failed: %Rrc\n", pszName, rc));
}
/**
* Generate a debugger compatible module name from a filename.
*
* @returns Pointer to module name (doesn't need to be pszName).
* @param pszFilename The source filename.
* @param pszName Buffer to put the module name in.
* @param cbName Buffer size.
*/
static const char *dbgDiggerWintNtFilenameToModuleName(const char *pszFilename, char *pszName, size_t cbName)
{
/* Skip to the filename part of the filename. :-) */
pszFilename = RTPathFilenameEx(pszFilename, RTPATH_STR_F_STYLE_DOS);
/* We try use 'nt' for the kernel. */
if ( RTStrICmpAscii(pszFilename, "ntoskrnl.exe") == 0
|| RTStrICmpAscii(pszFilename, "ntkrnlmp.exe") == 0)
return "nt";
/* Drop the extension if .dll or .sys. */
size_t cchFilename = strlen(pszFilename);
if ( cchFilename > 4
&& pszFilename[cchFilename - 4] == '.')
{
if ( RTStrICmpAscii(&pszFilename[cchFilename - 4], ".sys") == 0
|| RTStrICmpAscii(&pszFilename[cchFilename - 4], ".dll") == 0)
cchFilename -= 4;
}
/* Copy and do replacements. */
if (cchFilename >= cbName)
cchFilename = cbName - 1;
size_t off;
for (off = 0; off < cchFilename; off++)
{
char ch = pszFilename[off];
if (!RT_C_IS_ALNUM(ch))
ch = '_';
pszName[off] = ch;
}
pszName[off] = '\0';
return pszName;
}
/**
* @interface_method_impl{DBGFOSIWINNT,pfnQueryVersion}
*/
static DECLCALLBACK(int) dbgDiggerWinNtIWinNt_QueryVersion(struct DBGFOSIWINNT *pThis, PUVM pUVM, PCVMMR3VTABLE pVMM,
uint32_t *puVersMajor, uint32_t *puVersMinor,
uint32_t *puBuildNumber, bool *pf32Bit)
{
PDBGDIGGERWINNT pData = RT_FROM_MEMBER(pThis, DBGDIGGERWINNT, IWinNt);
RT_NOREF(pUVM, pVMM);
if (puVersMajor)
*puVersMajor = pData->NtMajorVersion;
if (puVersMinor)
*puVersMinor = pData->NtMinorVersion;
if (puBuildNumber)
*puBuildNumber = pData->NtBuildNumber;
if (pf32Bit)
*pf32Bit = pData->f32Bit;
return VINF_SUCCESS;
}
/**
* @interface_method_impl{DBGFOSIWINNT,pfnQueryKernelPtrs}
*/
static DECLCALLBACK(int) dbgDiggerWinNtIWinNt_QueryKernelPtrs(struct DBGFOSIWINNT *pThis, PUVM pUVM, PCVMMR3VTABLE pVMM,
PRTGCUINTPTR pGCPtrKernBase, PRTGCUINTPTR pGCPtrPsLoadedModuleList)
{
PDBGDIGGERWINNT pData = RT_FROM_MEMBER(pThis, DBGDIGGERWINNT, IWinNt);
RT_NOREF(pUVM, pVMM);
*pGCPtrKernBase = pData->KernelAddr.FlatPtr;
*pGCPtrPsLoadedModuleList = pData->PsLoadedModuleListAddr.FlatPtr;
return VINF_SUCCESS;
}
/**
* @interface_method_impl{DBGFOSIWINNT,pfnQueryKpcrForVCpu}
*/
static DECLCALLBACK(int) dbgDiggerWinNtIWinNt_QueryKpcrForVCpu(struct DBGFOSIWINNT *pThis, PUVM pUVM, PCVMMR3VTABLE pVMM,
VMCPUID idCpu, PRTGCUINTPTR pKpcr, PRTGCUINTPTR pKpcrb)
{
PDBGDIGGERWINNT pData = RT_FROM_MEMBER(pThis, DBGDIGGERWINNT, IWinNt);
if (!pData->paKpcrAddr)
return VERR_NOT_SUPPORTED;
AssertReturn(idCpu < pVMM->pfnDBGFR3CpuGetCount(pUVM), VERR_INVALID_CPU_ID);
if (pKpcr)
*pKpcr = pData->paKpcrAddr[idCpu].FlatPtr;
if (pKpcrb)
*pKpcrb = pData->paKpcrbAddr[idCpu].FlatPtr;
return VINF_SUCCESS;
}
/**
* @interface_method_impl{DBGFOSIWINNT,pfnQueryCurThrdForVCpu}
*/
static DECLCALLBACK(int) dbgDiggerWinNtIWinNt_QueryCurThrdForVCpu(struct DBGFOSIWINNT *pThis, PUVM pUVM, PCVMMR3VTABLE pVMM,
VMCPUID idCpu, PRTGCUINTPTR pCurThrd)
{
PDBGDIGGERWINNT pData = RT_FROM_MEMBER(pThis, DBGDIGGERWINNT, IWinNt);
if (!pData->paKpcrAddr)
return VERR_NOT_SUPPORTED;
AssertReturn(idCpu < pVMM->pfnDBGFR3CpuGetCount(pUVM), VERR_INVALID_CPU_ID);
DBGFADDRESS AddrCurThrdPtr = pData->paKpcrbAddr[idCpu];
pVMM->pfnDBGFR3AddrAdd(&AddrCurThrdPtr, 0x08); /** @todo Make this prettier. */
return pVMM->pfnDBGFR3MemRead(pUVM, idCpu, &AddrCurThrdPtr, pCurThrd, sizeof(*pCurThrd));
}
/**
* @copydoc DBGFOSREG::pfnStackUnwindAssist
*/
static DECLCALLBACK(int) dbgDiggerWinNtStackUnwindAssist(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData, VMCPUID idCpu,
PDBGFSTACKFRAME pFrame, PRTDBGUNWINDSTATE pState, PCCPUMCTX pInitialCtx,
RTDBGAS hAs, uint64_t *puScratch)
{
Assert(pInitialCtx);
/*
* We want to locate trap frames here. The trap frame structure contains
* the 64-bit IRET frame, so given unwind information it's easy to identify
* using the return type and frame address.
*/
if (pFrame->fFlags & DBGFSTACKFRAME_FLAGS_64BIT)
{
/*
* Is this a trap frame? If so, try read the trap frame.
*/
if ( pFrame->enmReturnType == RTDBGRETURNTYPE_IRET64
&& !(pFrame->AddrFrame.FlatPtr & 0x7)
&& WINNT64_VALID_ADDRESS(pFrame->AddrFrame.FlatPtr) )
{
KTRAP_FRAME_AMD64 TrapFrame;
RT_ZERO(TrapFrame);
uint64_t const uTrapFrameAddr = pFrame->AddrFrame.FlatPtr
- RT_UOFFSETOF(KTRAP_FRAME_AMD64, ErrCdOrXcptFrameOrS);
int rc = pState->pfnReadStack(pState, uTrapFrameAddr, sizeof(TrapFrame), &TrapFrame);
if (RT_SUCCESS(rc))
{
/* Valid? Not too much else we can check here (EFlags isn't
reliable in manually construct frames). */
if (TrapFrame.ExceptionActive <= 2)
{
pFrame->fFlags |= DBGFSTACKFRAME_FLAGS_TRAP_FRAME;
/*
* Add sure 'register' information from the frame to the frame.
*
* To avoid code duplication, we do this in two steps in a loop.
* The first iteration only figures out how many registers we're
* going to save and allocates room for them. The second iteration
* does the actual adding.
*/
uint32_t cRegs = pFrame->cSureRegs;
PDBGFREGVALEX paSureRegs = NULL;
#define ADD_REG_NAMED(a_Type, a_ValMemb, a_Value, a_pszName) do { \
if (paSureRegs) \
{ \
paSureRegs[iReg].pszName = a_pszName;\
paSureRegs[iReg].enmReg = DBGFREG_END; \
paSureRegs[iReg].enmType = a_Type; \
paSureRegs[iReg].Value.a_ValMemb = (a_Value); \
} \
iReg++; \
} while (0)
#define MAYBE_ADD_GREG(a_Value, a_enmReg, a_idxReg) do { \
if (!(pState->u.x86.Loaded.s.fRegs & RT_BIT(a_idxReg))) \
{ \
if (paSureRegs) \
{ \
pState->u.x86.Loaded.s.fRegs |= RT_BIT(a_idxReg); \
pState->u.x86.auRegs[a_idxReg] = (a_Value); \
paSureRegs[iReg].Value.u64 = (a_Value); \
paSureRegs[iReg].enmReg = a_enmReg; \
paSureRegs[iReg].enmType = DBGFREGVALTYPE_U64; \
paSureRegs[iReg].pszName = NULL; \
} \
iReg++; \
} \
} while (0)
for (unsigned iLoop = 0; iLoop < 2; iLoop++)
{
uint32_t iReg = pFrame->cSureRegs;
ADD_REG_NAMED(DBGFREGVALTYPE_U64, u64, uTrapFrameAddr, "TrapFrame");
ADD_REG_NAMED(DBGFREGVALTYPE_U8, u8, TrapFrame.ExceptionActive, "ExceptionActive");
if (TrapFrame.ExceptionActive == 0)
{
ADD_REG_NAMED(DBGFREGVALTYPE_U8, u8, TrapFrame.PreviousIrql, "PrevIrql");
ADD_REG_NAMED(DBGFREGVALTYPE_U8, u8, (uint8_t)TrapFrame.ErrCdOrXcptFrameOrS, "IntNo");
}
else if ( TrapFrame.ExceptionActive == 1
&& TrapFrame.FaultIndicator == ((TrapFrame.ErrCdOrXcptFrameOrS >> 1) & 0x9))
ADD_REG_NAMED(DBGFREGVALTYPE_U64, u64, TrapFrame.FaultAddrOrCtxRecOrTS, "cr2-probably");
if (TrapFrame.SegCs & X86_SEL_RPL)
ADD_REG_NAMED(DBGFREGVALTYPE_U8, u8, 1, "UserMode");
else
ADD_REG_NAMED(DBGFREGVALTYPE_U8, u8, 1, "KernelMode");
if (TrapFrame.ExceptionActive <= 1)
{
MAYBE_ADD_GREG(TrapFrame.Rax, DBGFREG_RAX, X86_GREG_xAX);
MAYBE_ADD_GREG(TrapFrame.Rcx, DBGFREG_RCX, X86_GREG_xCX);
MAYBE_ADD_GREG(TrapFrame.Rdx, DBGFREG_RDX, X86_GREG_xDX);
MAYBE_ADD_GREG(TrapFrame.R8, DBGFREG_R8, X86_GREG_x8);
MAYBE_ADD_GREG(TrapFrame.R9, DBGFREG_R9, X86_GREG_x9);
MAYBE_ADD_GREG(TrapFrame.R10, DBGFREG_R10, X86_GREG_x10);
MAYBE_ADD_GREG(TrapFrame.R11, DBGFREG_R11, X86_GREG_x11);
}
else if (TrapFrame.ExceptionActive == 2)
{
MAYBE_ADD_GREG(TrapFrame.Rbx, DBGFREG_RBX, X86_GREG_xBX);
MAYBE_ADD_GREG(TrapFrame.Rsi, DBGFREG_RSI, X86_GREG_xSI);
MAYBE_ADD_GREG(TrapFrame.Rdi, DBGFREG_RDI, X86_GREG_xDI);
}
// MAYBE_ADD_GREG(TrapFrame.Rbp, DBGFREG_RBP, X86_GREG_xBP); - KiInterrupt[Sub]Dispatch* may leave this invalid.
/* Done? */
if (iLoop > 0)
{
Assert(cRegs == iReg);
break;
}
/* Resize the array, zeroing the extension. */
if (pFrame->cSureRegs)
paSureRegs = (PDBGFREGVALEX)pVMM->pfnMMR3HeapRealloc(pFrame->paSureRegs, iReg * sizeof(paSureRegs[0]));
else
paSureRegs = (PDBGFREGVALEX)pVMM->pfnMMR3HeapAllocU(pUVM, MM_TAG_DBGF_STACK, iReg * sizeof(paSureRegs[0]));
AssertReturn(paSureRegs, VERR_NO_MEMORY);
pFrame->paSureRegs = paSureRegs;
RT_BZERO(&paSureRegs[pFrame->cSureRegs], (iReg - pFrame->cSureRegs) * sizeof(paSureRegs[0]));
cRegs = iReg;
}
#undef ADD_REG_NAMED
#undef MAYBE_ADD_GREG
/* Commit the register update. */
pFrame->cSureRegs = cRegs;
}
}
}
}
RT_NOREF(pUVM, pVMM, pvData, idCpu, hAs, pInitialCtx, puScratch);
return VINF_SUCCESS;
}
/**
* @copydoc DBGFOSREG::pfnQueryInterface
*/
static DECLCALLBACK(void *) dbgDiggerWinNtQueryInterface(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData, DBGFOSINTERFACE enmIf)
{
RT_NOREF(pUVM, pVMM);
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData;
switch (enmIf)
{
case DBGFOSINTERFACE_WINNT:
return &pThis->IWinNt;
default:
return NULL;
}
}
/**
* @copydoc DBGFOSREG::pfnQueryVersion
*/
static DECLCALLBACK(int) dbgDiggerWinNtQueryVersion(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData,
char *pszVersion, size_t cchVersion)
{
RT_NOREF(pUVM, pVMM);
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData;
Assert(pThis->fValid);
const char *pszNtProductType;
switch (pThis->NtProductType)
{
case kNtProductType_WinNt: pszNtProductType = "-WinNT"; break;
case kNtProductType_LanManNt: pszNtProductType = "-LanManNT"; break;
case kNtProductType_Server: pszNtProductType = "-Server"; break;
default: pszNtProductType = ""; break;
}
RTStrPrintf(pszVersion, cchVersion, "%u.%u-%s%s (BuildNumber %u)", pThis->NtMajorVersion, pThis->NtMinorVersion,
pThis->f32Bit ? "x86" : "AMD64", pszNtProductType, pThis->NtBuildNumber);
return VINF_SUCCESS;
}
/**
* @copydoc DBGFOSREG::pfnTerm
*/
static DECLCALLBACK(void) dbgDiggerWinNtTerm(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
{
RT_NOREF1(pUVM);
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData;
Assert(pThis->fValid);
#ifdef VBOX_DEBUGGER_WITH_WIN_DBG_PRINT_HOOKING
if (pThis->hBpDbgPrint != NIL_DBGFBP)
{
int rc = DBGFR3BpClear(pUVM, pThis->hBpDbgPrint);
AssertRC(rc);
pThis->hBpDbgPrint = NIL_DBGFBP;
}
if (pThis->hBpOwnerDbgPrint != NIL_DBGFBPOWNER)
{
int rc = DBGFR3BpOwnerDestroy(pUVM, pThis->hBpOwnerDbgPrint);
AssertRC(rc);
pThis->hBpOwnerDbgPrint = NIL_DBGFBPOWNER;
}
#endif
/*
* As long as we're using our private LDR reader implementation,
* we must unlink and ditch the modules we created.
*/
RTDBGAS hDbgAs = pVMM->pfnDBGFR3AsResolveAndRetain(pUVM, DBGF_AS_KERNEL);
if (hDbgAs != NIL_RTDBGAS)
{
uint32_t iMod = RTDbgAsModuleCount(hDbgAs);
while (iMod-- > 0)
{
RTDBGMOD hMod = RTDbgAsModuleByIndex(hDbgAs, iMod);
if (hMod != NIL_RTDBGMOD)
{
if (RTDbgModGetTag(hMod) == DIG_WINNT_MOD_TAG)
{
int rc = RTDbgAsModuleUnlink(hDbgAs, hMod);
AssertRC(rc);
}
RTDbgModRelease(hMod);
}
}
RTDbgAsRelease(hDbgAs);
}
if (pThis->paKpcrAddr)
RTMemFree(pThis->paKpcrAddr);
/* pThis->paKpcrbAddr comes from the same allocation as pThis->paKpcrAddr. */
pThis->paKpcrAddr = NULL;
pThis->paKpcrbAddr = NULL;
pThis->fValid = false;
}
/**
* @copydoc DBGFOSREG::pfnRefresh
*/
static DECLCALLBACK(int) dbgDiggerWinNtRefresh(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
{
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData;
NOREF(pThis);
Assert(pThis->fValid);
/*
* For now we'll flush and reload everything.
*/
dbgDiggerWinNtTerm(pUVM, pVMM, pvData);
return dbgDiggerWinNtInit(pUVM, pVMM, pvData);
}
/**
* @copydoc DBGFOSREG::pfnInit
*/
static DECLCALLBACK(int) dbgDiggerWinNtInit(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
{
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData;
Assert(!pThis->fValid);
union
{
uint8_t au8[0x2000];
RTUTF16 wsz[0x2000/2];
NTKUSERSHAREDDATA UserSharedData;
} u;
DBGFADDRESS Addr;
int rc;
/*
* Figure the NT version.
*/
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, pThis->f32Bit ? NTKUSERSHAREDDATA_WINNT32 : NTKUSERSHAREDDATA_WINNT64);
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/, &Addr, &u, PAGE_SIZE);
if (RT_SUCCESS(rc))
{
pThis->NtProductType = u.UserSharedData.ProductTypeIsValid && u.UserSharedData.NtProductType <= kNtProductType_Server
? (NTPRODUCTTYPE)u.UserSharedData.NtProductType
: kNtProductType_Invalid;
pThis->NtMajorVersion = u.UserSharedData.NtMajorVersion;
pThis->NtMinorVersion = u.UserSharedData.NtMinorVersion;
pThis->NtBuildNumber = u.UserSharedData.NtBuildNumber;
}
else if (pThis->fNt31)
{
pThis->NtProductType = kNtProductType_WinNt;
pThis->NtMajorVersion = 3;
pThis->NtMinorVersion = 1;
pThis->NtBuildNumber = 0;
}
else
{
Log(("DigWinNt: Error reading KUSER_SHARED_DATA: %Rrc\n", rc));
return rc;
}
/*
* Dig out the module chain.
*/
DBGFADDRESS AddrPrev = pThis->PsLoadedModuleListAddr;
Addr = pThis->KernelMteAddr;
do
{
/* Read the validate the MTE. */
NTMTE Mte;
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/, &Addr, &Mte, pThis->f32Bit ? sizeof(Mte.vX_32) : sizeof(Mte.vX_64));
if (RT_FAILURE(rc))
break;
if (WINNT_UNION(pThis, &Mte, InLoadOrderLinks.Blink) != AddrPrev.FlatPtr)
{
Log(("DigWinNt: Bad Mte At %RGv - backpointer\n", Addr.FlatPtr));
break;
}
if (!WINNT_VALID_ADDRESS(pThis, WINNT_UNION(pThis, &Mte, InLoadOrderLinks.Flink)) )
{
Log(("DigWinNt: Bad Mte at %RGv - forward pointer\n", Addr.FlatPtr));
break;
}
if (!WINNT_VALID_ADDRESS(pThis, WINNT_UNION(pThis, &Mte, BaseDllName.Buffer)))
{
Log(("DigWinNt: Bad Mte at %RGv - BaseDllName=%llx\n", Addr.FlatPtr, WINNT_UNION(pThis, &Mte, BaseDllName.Buffer)));
break;
}
if (!WINNT_VALID_ADDRESS(pThis, WINNT_UNION(pThis, &Mte, FullDllName.Buffer)))
{
Log(("DigWinNt: Bad Mte at %RGv - FullDllName=%llx\n", Addr.FlatPtr, WINNT_UNION(pThis, &Mte, FullDllName.Buffer)));
break;
}
if (!WINNT_VALID_ADDRESS(pThis, WINNT_UNION(pThis, &Mte, DllBase)))
{
Log(("DigWinNt: Bad Mte at %RGv - DllBase=%llx\n", Addr.FlatPtr, WINNT_UNION(pThis, &Mte, DllBase) ));
break;
}
uint32_t const cbImageMte = !pThis->fNt31 ? WINNT_UNION(pThis, &Mte, SizeOfImage) : 0;
if ( !pThis->fNt31
&& ( cbImageMte > _256M
|| WINNT_UNION(pThis, &Mte, EntryPoint) - WINNT_UNION(pThis, &Mte, DllBase) > cbImageMte) )
{
Log(("DigWinNt: Bad Mte at %RGv - EntryPoint=%llx SizeOfImage=%x DllBase=%llx\n",
Addr.FlatPtr, WINNT_UNION(pThis, &Mte, EntryPoint), cbImageMte, WINNT_UNION(pThis, &Mte, DllBase)));
break;
}
/* Read the full name. */
DBGFADDRESS AddrName;
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &AddrName, WINNT_UNION(pThis, &Mte, FullDllName.Buffer));
uint16_t cbName = WINNT_UNION(pThis, &Mte, FullDllName.Length);
if (cbName < sizeof(u))
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/, &AddrName, &u, cbName);
else
rc = VERR_OUT_OF_RANGE;
if (RT_FAILURE(rc))
{
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &AddrName, WINNT_UNION(pThis, &Mte, BaseDllName.Buffer));
cbName = WINNT_UNION(pThis, &Mte, BaseDllName.Length);
if (cbName < sizeof(u))
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/, &AddrName, &u, cbName);
else
rc = VERR_OUT_OF_RANGE;
}
if (RT_SUCCESS(rc))
{
u.wsz[cbName / 2] = '\0';
char *pszFilename;
rc = RTUtf16ToUtf8(u.wsz, &pszFilename);
if (RT_SUCCESS(rc))
{
char szModName[128];
const char *pszModName = dbgDiggerWintNtFilenameToModuleName(pszFilename, szModName, sizeof(szModName));
/* Read the start of the PE image and pass it along to a worker. */
DBGFADDRESS ImageAddr;
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &ImageAddr, WINNT_UNION(pThis, &Mte, DllBase));
dbgDiggerWinNtProcessImage(pThis, pUVM, pVMM, pszModName, pszFilename, &ImageAddr, cbImageMte);
RTStrFree(pszFilename);
}
}
/* next */
AddrPrev = Addr;
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, WINNT_UNION(pThis, &Mte, InLoadOrderLinks.Flink));
} while ( Addr.FlatPtr != pThis->KernelMteAddr.FlatPtr
&& Addr.FlatPtr != pThis->PsLoadedModuleListAddr.FlatPtr);
/* Try resolving the KPCR and KPCRB addresses for each vCPU. */
dbgDiggerWinNtResolveKpcr(pThis, pUVM, pVMM);
#ifdef VBOX_DEBUGGER_WITH_WIN_DBG_PRINT_HOOKING
/* Try to hook into the DbgPrint/vDbgPrint... code so we can gather information from the drivers. */
dbgDiggerWinNtDbgPrintHook(pThis, pUVM);
#endif
pThis->fValid = true;
return VINF_SUCCESS;
}
/**
* @copydoc DBGFOSREG::pfnProbe
*/
static DECLCALLBACK(bool) dbgDiggerWinNtProbe(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
{
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData;
DBGFADDRESS Addr;
union
{
uint8_t au8[8192];
uint16_t au16[8192/2];
uint32_t au32[8192/4];
IMAGE_DOS_HEADER MzHdr;
RTUTF16 wsz[8192/2];
X86DESCGATE a32Gates[X86_XCPT_PF + 1];
X86DESC64GATE a64Gates[X86_XCPT_PF + 1];
} u;
union
{
NTMTE32 v32;
NTMTE64 v64;
} uMte, uMte2, uMte3;
/*
* NT only runs in protected or long mode.
*/
CPUMMODE const enmMode = pVMM->pfnDBGFR3CpuGetMode(pUVM, 0 /*idCpu*/);
if (enmMode != CPUMMODE_PROTECTED && enmMode != CPUMMODE_LONG)
return false;
bool const f64Bit = enmMode == CPUMMODE_LONG;
uint64_t const uStart = f64Bit ? UINT64_C(0xffff080000000000) : UINT32_C(0x80001000);
uint64_t const uEnd = f64Bit ? UINT64_C(0xffffffffffff0000) : UINT32_C(0xffff0000);
/*
* To approximately locate the kernel we examine the IDTR handlers.
*
* The exception/trap/fault handlers are all in NT kernel image, we pick
* KiPageFault here.
*/
uint64_t uIdtrBase = 0;
uint16_t uIdtrLimit = 0;
int rc = pVMM->pfnDBGFR3RegCpuQueryXdtr(pUVM, 0, DBGFREG_IDTR, &uIdtrBase, &uIdtrLimit);
AssertRCReturn(rc, false);
const uint16_t cbMinIdtr = (X86_XCPT_PF + 1) * (f64Bit ? sizeof(X86DESC64GATE) : sizeof(X86DESCGATE));
if (uIdtrLimit < cbMinIdtr)
return false;
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/, pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, uIdtrBase), &u, cbMinIdtr);
if (RT_FAILURE(rc))
return false;
uint64_t uKrnlStart = uStart;
uint64_t uKrnlEnd = uEnd;
if (f64Bit)
{
uint64_t uHandler = u.a64Gates[X86_XCPT_PF].u16OffsetLow
| ((uint32_t)u.a64Gates[X86_XCPT_PF].u16OffsetHigh << 16)
| ((uint64_t)u.a64Gates[X86_XCPT_PF].u32OffsetTop << 32);
if (uHandler < uStart || uHandler > uEnd)
return false;
uKrnlStart = (uHandler & ~(uint64_t)_4M) - _512M;
uKrnlEnd = (uHandler + (uint64_t)_4M) & ~(uint64_t)_4M;
}
else
{
uint32_t uHandler = RT_MAKE_U32(u.a32Gates[X86_XCPT_PF].u16OffsetLow, u.a32Gates[X86_XCPT_PF].u16OffsetHigh);
if (uHandler < uStart || uHandler > uEnd)
return false;
uKrnlStart = (uHandler & ~(uint64_t)_4M) - _64M;
uKrnlEnd = (uHandler + (uint64_t)_4M) & ~(uint64_t)_4M;
}
/*
* Look for the PAGELK section name that seems to be a part of all kernels.
* Then try find the module table entry for it. Since it's the first entry
* in the PsLoadedModuleList we can easily validate the list head and report
* success.
*
* Note! We ASSUME the section name is 8 byte aligned.
*/
DBGFADDRESS KernelAddr;
for (pVMM->pfnDBGFR3AddrFromFlat(pUVM, &KernelAddr, uKrnlStart);
KernelAddr.FlatPtr < uKrnlEnd;
KernelAddr.FlatPtr += PAGE_SIZE)
{
bool fNt31 = false;
DBGFADDRESS const RetryAddress = KernelAddr;
rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /*idCpu*/, &KernelAddr, uEnd - KernelAddr.FlatPtr,
8, "PAGELK\0", sizeof("PAGELK\0"), &KernelAddr);
if ( rc == VERR_DBGF_MEM_NOT_FOUND
&& enmMode != CPUMMODE_LONG)
{
/* NT3.1 didn't have a PAGELK section, so look for _TEXT instead. The
following VirtualSize is zero, so check for that too. */
rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /*idCpu*/, &RetryAddress, uEnd - RetryAddress.FlatPtr,
8, "_TEXT\0\0\0\0\0\0", sizeof("_TEXT\0\0\0\0\0\0"), &KernelAddr);
fNt31 = true;
}
if (RT_FAILURE(rc))
break;
pVMM->pfnDBGFR3AddrSub(&KernelAddr, KernelAddr.FlatPtr & PAGE_OFFSET_MASK);
/* MZ + PE header. */
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/, &KernelAddr, &u, sizeof(u));
if ( RT_SUCCESS(rc)
&& u.MzHdr.e_magic == IMAGE_DOS_SIGNATURE
&& !(u.MzHdr.e_lfanew & 0x7)
&& u.MzHdr.e_lfanew >= 0x080
&& u.MzHdr.e_lfanew <= 0x400) /* W8 is at 0x288*/
{
if (enmMode != CPUMMODE_LONG)
{
IMAGE_NT_HEADERS32 const *pHdrs = (IMAGE_NT_HEADERS32 const *)&u.au8[u.MzHdr.e_lfanew];
if ( pHdrs->Signature == IMAGE_NT_SIGNATURE
&& pHdrs->FileHeader.Machine == IMAGE_FILE_MACHINE_I386
&& pHdrs->FileHeader.SizeOfOptionalHeader == sizeof(pHdrs->OptionalHeader)
&& pHdrs->FileHeader.NumberOfSections >= 10 /* the kernel has lots */
&& (pHdrs->FileHeader.Characteristics & (IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_DLL)) == IMAGE_FILE_EXECUTABLE_IMAGE
&& pHdrs->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC
&& pHdrs->OptionalHeader.NumberOfRvaAndSizes == IMAGE_NUMBEROF_DIRECTORY_ENTRIES
)
{
/* Find the MTE. */
RT_ZERO(uMte);
uMte.v32.DllBase = KernelAddr.FlatPtr;
uMte.v32.EntryPoint = KernelAddr.FlatPtr + pHdrs->OptionalHeader.AddressOfEntryPoint;
uMte.v32.SizeOfImage = !fNt31 ? pHdrs->OptionalHeader.SizeOfImage : 0; /* NT 3.1 didn't set the size. */
DBGFADDRESS HitAddr;
rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /*idCpu*/, &KernelAddr, uEnd - KernelAddr.FlatPtr,
4 /*align*/, &uMte.v32.DllBase, 3 * sizeof(uint32_t), &HitAddr);
while (RT_SUCCESS(rc))
{
/* check the name. */
DBGFADDRESS MteAddr = HitAddr;
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/,
pVMM->pfnDBGFR3AddrSub(&MteAddr, RT_OFFSETOF(NTMTE32, DllBase)),
&uMte2.v32, sizeof(uMte2.v32));
if ( RT_SUCCESS(rc)
&& uMte2.v32.DllBase == uMte.v32.DllBase
&& uMte2.v32.EntryPoint == uMte.v32.EntryPoint
&& uMte2.v32.SizeOfImage == uMte.v32.SizeOfImage
&& WINNT32_VALID_ADDRESS(uMte2.v32.InLoadOrderLinks.Flink)
&& WINNT32_VALID_ADDRESS(uMte2.v32.BaseDllName.Buffer)
&& WINNT32_VALID_ADDRESS(uMte2.v32.FullDllName.Buffer)
&& uMte2.v32.BaseDllName.Length <= 128
&& uMte2.v32.FullDllName.Length <= 260
)
{
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/,
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, uMte2.v32.BaseDllName.Buffer),
u.wsz, uMte2.v32.BaseDllName.Length);
u.wsz[uMte2.v32.BaseDllName.Length / 2] = '\0';
if ( RT_SUCCESS(rc)
&& ( !RTUtf16ICmp(u.wsz, g_wszKernelNames[0])
/* || !RTUtf16ICmp(u.wsz, g_wszKernelNames[1]) */
)
)
{
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/,
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr,
uMte2.v32.InLoadOrderLinks.Blink),
&uMte3.v32, RT_SIZEOFMEMB(NTMTE32, InLoadOrderLinks));
if ( RT_SUCCESS(rc)
&& uMte3.v32.InLoadOrderLinks.Flink == MteAddr.FlatPtr
&& WINNT32_VALID_ADDRESS(uMte3.v32.InLoadOrderLinks.Blink) )
{
Log(("DigWinNt: MteAddr=%RGv KernelAddr=%RGv SizeOfImage=%x &PsLoadedModuleList=%RGv (32-bit)\n",
MteAddr.FlatPtr, KernelAddr.FlatPtr, uMte2.v32.SizeOfImage, Addr.FlatPtr));
pThis->KernelAddr = KernelAddr;
pThis->KernelMteAddr = MteAddr;
pThis->PsLoadedModuleListAddr = Addr;
pThis->f32Bit = true;
pThis->fNt31 = fNt31;
return true;
}
}
else if (RT_SUCCESS(rc))
{
Log2(("DigWinNt: Wrong module: MteAddr=%RGv ImageAddr=%RGv SizeOfImage=%#x '%ls'\n",
MteAddr.FlatPtr, KernelAddr.FlatPtr, uMte2.v32.SizeOfImage, u.wsz));
break; /* Not NT kernel */
}
}
/* next */
pVMM->pfnDBGFR3AddrAdd(&HitAddr, 4);
if (HitAddr.FlatPtr < uEnd)
rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /*idCpu*/, &HitAddr, uEnd - HitAddr.FlatPtr,
4 /*align*/, &uMte.v32.DllBase, 3 * sizeof(uint32_t), &HitAddr);
else
rc = VERR_DBGF_MEM_NOT_FOUND;
}
}
}
else
{
IMAGE_NT_HEADERS64 const *pHdrs = (IMAGE_NT_HEADERS64 const *)&u.au8[u.MzHdr.e_lfanew];
if ( pHdrs->Signature == IMAGE_NT_SIGNATURE
&& pHdrs->FileHeader.Machine == IMAGE_FILE_MACHINE_AMD64
&& pHdrs->FileHeader.SizeOfOptionalHeader == sizeof(pHdrs->OptionalHeader)
&& pHdrs->FileHeader.NumberOfSections >= 10 /* the kernel has lots */
&& (pHdrs->FileHeader.Characteristics & (IMAGE_FILE_EXECUTABLE_IMAGE | IMAGE_FILE_DLL))
== IMAGE_FILE_EXECUTABLE_IMAGE
&& pHdrs->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR64_MAGIC
&& pHdrs->OptionalHeader.NumberOfRvaAndSizes == IMAGE_NUMBEROF_DIRECTORY_ENTRIES
)
{
/* Find the MTE. */
RT_ZERO(uMte.v64);
uMte.v64.DllBase = KernelAddr.FlatPtr;
uMte.v64.EntryPoint = KernelAddr.FlatPtr + pHdrs->OptionalHeader.AddressOfEntryPoint;
uMte.v64.SizeOfImage = pHdrs->OptionalHeader.SizeOfImage;
DBGFADDRESS ScanAddr;
DBGFADDRESS HitAddr;
rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /*idCpu*/, pVMM->pfnDBGFR3AddrFromFlat(pUVM, &ScanAddr, uStart),
uEnd - uStart, 8 /*align*/, &uMte.v64.DllBase, 5 * sizeof(uint32_t), &HitAddr);
while (RT_SUCCESS(rc))
{
/* Read the start of the MTE and check some basic members. */
DBGFADDRESS MteAddr = HitAddr;
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/,
pVMM->pfnDBGFR3AddrSub(&MteAddr, RT_OFFSETOF(NTMTE64, DllBase)),
&uMte2.v64, sizeof(uMte2.v64));
if ( RT_SUCCESS(rc)
&& uMte2.v64.DllBase == uMte.v64.DllBase
&& uMte2.v64.EntryPoint == uMte.v64.EntryPoint
&& uMte2.v64.SizeOfImage == uMte.v64.SizeOfImage
&& WINNT64_VALID_ADDRESS(uMte2.v64.InLoadOrderLinks.Flink)
&& WINNT64_VALID_ADDRESS(uMte2.v64.BaseDllName.Buffer)
&& WINNT64_VALID_ADDRESS(uMte2.v64.FullDllName.Buffer)
&& uMte2.v64.BaseDllName.Length <= 128
&& uMte2.v64.FullDllName.Length <= 260
)
{
/* Try read the base name and compare with known NT kernel names. */
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/,
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr, uMte2.v64.BaseDllName.Buffer),
u.wsz, uMte2.v64.BaseDllName.Length);
u.wsz[uMte2.v64.BaseDllName.Length / 2] = '\0';
if ( RT_SUCCESS(rc)
&& ( !RTUtf16ICmp(u.wsz, g_wszKernelNames[0])
/* || !RTUtf16ICmp(u.wsz, g_wszKernelNames[1]) */
)
)
{
/* Read the link entry of the previous entry in the list and check that its
forward pointer points at the MTE we've found. */
rc = pVMM->pfnDBGFR3MemRead(pUVM, 0 /*idCpu*/,
pVMM->pfnDBGFR3AddrFromFlat(pUVM, &Addr,
uMte2.v64.InLoadOrderLinks.Blink),
&uMte3.v64, RT_SIZEOFMEMB(NTMTE64, InLoadOrderLinks));
if ( RT_SUCCESS(rc)
&& uMte3.v64.InLoadOrderLinks.Flink == MteAddr.FlatPtr
&& WINNT64_VALID_ADDRESS(uMte3.v64.InLoadOrderLinks.Blink) )
{
Log(("DigWinNt: MteAddr=%RGv KernelAddr=%RGv SizeOfImage=%x &PsLoadedModuleList=%RGv (32-bit)\n",
MteAddr.FlatPtr, KernelAddr.FlatPtr, uMte2.v64.SizeOfImage, Addr.FlatPtr));
pThis->KernelAddr = KernelAddr;
pThis->KernelMteAddr = MteAddr;
pThis->PsLoadedModuleListAddr = Addr;
pThis->f32Bit = false;
pThis->fNt31 = false;
return true;
}
}
else if (RT_SUCCESS(rc))
{
Log2(("DigWinNt: Wrong module: MteAddr=%RGv ImageAddr=%RGv SizeOfImage=%#x '%ls'\n",
MteAddr.FlatPtr, KernelAddr.FlatPtr, uMte2.v64.SizeOfImage, u.wsz));
break; /* Not NT kernel */
}
}
/* next */
pVMM->pfnDBGFR3AddrAdd(&HitAddr, 8);
if (HitAddr.FlatPtr < uEnd)
rc = pVMM->pfnDBGFR3MemScan(pUVM, 0 /*idCpu*/, &HitAddr, uEnd - HitAddr.FlatPtr,
8 /*align*/, &uMte.v64.DllBase, 3 * sizeof(uint32_t), &HitAddr);
else
rc = VERR_DBGF_MEM_NOT_FOUND;
}
}
}
}
}
return false;
}
/**
* @copydoc DBGFOSREG::pfnDestruct
*/
static DECLCALLBACK(void) dbgDiggerWinNtDestruct(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
{
RT_NOREF(pUVM, pVMM, pvData);
}
/**
* @copydoc DBGFOSREG::pfnConstruct
*/
static DECLCALLBACK(int) dbgDiggerWinNtConstruct(PUVM pUVM, PCVMMR3VTABLE pVMM, void *pvData)
{
RT_NOREF(pUVM, pVMM);
PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData;
pThis->fValid = false;
pThis->f32Bit = false;
pThis->enmVer = DBGDIGGERWINNTVER_UNKNOWN;
pThis->IWinNt.u32Magic = DBGFOSIWINNT_MAGIC;
pThis->IWinNt.pfnQueryVersion = dbgDiggerWinNtIWinNt_QueryVersion;
pThis->IWinNt.pfnQueryKernelPtrs = dbgDiggerWinNtIWinNt_QueryKernelPtrs;
pThis->IWinNt.pfnQueryKpcrForVCpu = dbgDiggerWinNtIWinNt_QueryKpcrForVCpu;
pThis->IWinNt.pfnQueryCurThrdForVCpu = dbgDiggerWinNtIWinNt_QueryCurThrdForVCpu;
pThis->IWinNt.u32EndMagic = DBGFOSIWINNT_MAGIC;
#ifdef VBOX_DEBUGGER_WITH_WIN_DBG_PRINT_HOOKING
pThis->hBpDbgPrint = NIL_DBGFBP;
pThis->hBpOwnerDbgPrint = NIL_DBGFBPOWNER;
#endif
return VINF_SUCCESS;
}
const DBGFOSREG g_DBGDiggerWinNt =
{
/* .u32Magic = */ DBGFOSREG_MAGIC,
/* .fFlags = */ 0,
/* .cbData = */ sizeof(DBGDIGGERWINNT),
/* .szName = */ "WinNT",
/* .pfnConstruct = */ dbgDiggerWinNtConstruct,
/* .pfnDestruct = */ dbgDiggerWinNtDestruct,
/* .pfnProbe = */ dbgDiggerWinNtProbe,
/* .pfnInit = */ dbgDiggerWinNtInit,
/* .pfnRefresh = */ dbgDiggerWinNtRefresh,
/* .pfnTerm = */ dbgDiggerWinNtTerm,
/* .pfnQueryVersion = */ dbgDiggerWinNtQueryVersion,
/* .pfnQueryInterface = */ dbgDiggerWinNtQueryInterface,
/* .pfnStackUnwindAssist = */ dbgDiggerWinNtStackUnwindAssist,
/* .u32EndMagic = */ DBGFOSREG_MAGIC
};
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