/* $Id: DBGPlugInWinNt.cpp 37809 2011-07-07 08:15:02Z vboxsync $ */ /** @file * DBGPlugInWindows - Debugger and Guest OS Digger Plugin For Windows NT. */ /* * Copyright (C) 2009-2010 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_DBGF ///@todo add new log group. #include "DBGPlugIns.h" #include #include #include #include #include #include #include "../Runtime/include/internal/ldrMZ.h" /* ugly */ #include "../Runtime/include/internal/ldrPE.h" /* ugly */ /******************************************************************************* * 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; 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 32-bit NT aka LDR_DATA_TABLE_ENTRY. * Tested with XP. * * @todo This is incomplete and just to get rid of warnings. */ typedef struct NTMTE64 { struct { uint64_t Flink; uint64_t Blink; } InLoadOrderLinks, InMemoryOrderModuleList, InInitializationOrderModuleList; uint64_t DllBase; uint64_t EntryPoint; uint32_t SizeOfImage; uint32_t Alignment; struct { uint16_t Length; uint16_t MaximumLength; uint32_t Alignment; uint64_t Buffer; } FullDllName, BaseDllName; uint32_t Flags; uint16_t LoadCount; uint16_t TlsIndex; /* ... 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[7]; 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; /** * PDB v2.0 in image debug info. * The URL is constructed from the timestamp and the %02x age? */ typedef struct CV_INFO_PDB20 { uint32_t Signature; /**< CV_SIGNATURE_PDB70. */ int32_t Offset; /**< Always 0. Used to be the offset to the real debug info. */ uint32_t TimeDateStamp; uint32_t Age; uint8_t PdbFilename[4]; } CV_INFO_PDB20; /** The CV_INFO_PDB20 signature. */ #define CV_SIGNATURE_PDB20 RT_MAKE_U32_FROM_U8('N','B','1','0') /** * PDB v7.0 in image debug info. * The URL is constructed from the signature and the %02x age. */ #pragma pack(4) typedef struct CV_INFO_PDB70 { uint32_t CvSignature; /**< CV_SIGNATURE_PDB70. */ RTUUID Signature; uint32_t Age; uint8_t PdbFilename[4]; } CV_INFO_PDB70; #pragma pack() AssertCompileMemberOffset(CV_INFO_PDB70, Signature, 4); AssertCompileMemberOffset(CV_INFO_PDB70, Age, 4 + 16); /** The CV_INFO_PDB70 signature. */ #define CV_SIGNATURE_PDB70 RT_MAKE_U32_FROM_U8('R','S','D','S') /** @} */ 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; /** The NT version. */ DBGDIGGERWINNTVER enmVer; /** NTKUSERSHAREDDATA::NtProductType */ NTPRODUCTTYPE NtProductType; /** NTKUSERSHAREDDATA::NtMajorVersion */ uint32_t NtMajorVersion; /** NTKUSERSHAREDDATA::NtMinorVersion */ uint32_t NtMinorVersion; /** 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; } DBGDIGGERWINNT; /** Pointer to the linux guest OS digger instance data. */ typedef DBGDIGGERWINNT *PDBGDIGGERWINNT; /******************************************************************************* * 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(0xffffffff80000000) && (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(PVM pVM, 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' } }; /** * Process a PE image found in guest memory. * * @param pThis The instance data. * @param pVM The VM handle. * @param pszName The image name. * @param pImageAddr The image address. * @param cbImage The size of the image. * @param pbBuf Scratch buffer containing the first * RT_MIN(cbBuf, cbImage) bytes of the image. * @param cbBuf The scratch buffer size. */ static void dbgDiggerWinNtProcessImage(PDBGDIGGERWINNT pThis, PVM pVM, const char *pszName, PCDBGFADDRESS pImageAddr, uint32_t cbImage, uint8_t *pbBuf, size_t cbBuf) { LogFlow(("DigWinNt: %RGp %#x %s\n", pImageAddr->FlatPtr, cbImage, pszName)); /* * Do some basic validation first. * This is the usual exteremely verbose and messy code... */ Assert(cbBuf >= sizeof(IMAGE_NT_HEADERS64)); if ( cbImage < sizeof(IMAGE_NT_HEADERS64) || cbImage >= _1M * 256) { Log(("DigWinNt: %s: Bad image size: %#x\n", pszName, cbImage)); return; } /* Dig out the NT/PE headers. */ IMAGE_DOS_HEADER const *pMzHdr = (IMAGE_DOS_HEADER const *)pbBuf; typedef union NTHDRSU { IMAGE_NT_HEADERS64 vX_32; IMAGE_NT_HEADERS64 vX_64; } NTHDRS; NTHDRS const *pHdrs; uint32_t offHdrs; if (pMzHdr->e_magic != IMAGE_DOS_SIGNATURE) { offHdrs = 0; pHdrs = (NTHDRS const *)pbBuf; } else if ( pMzHdr->e_lfanew >= cbImage || pMzHdr->e_lfanew < sizeof(*pMzHdr) || pMzHdr->e_lfanew + sizeof(IMAGE_NT_HEADERS64) > cbImage) { Log(("DigWinNt: %s: PE header to far into image: %#x cbImage=%#x\n", pMzHdr->e_lfanew, cbImage)); return; } else if ( pMzHdr->e_lfanew < cbBuf && pMzHdr->e_lfanew + sizeof(IMAGE_NT_HEADERS64) <= cbBuf) { offHdrs = pMzHdr->e_lfanew; pHdrs = (NTHDRS const *)(pbBuf + offHdrs); } else { Log(("DigWinNt: %s: PE header to far into image (lazy bird): %#x\n", pMzHdr->e_lfanew)); return; } if (pHdrs->vX_32.Signature != IMAGE_NT_SIGNATURE) { Log(("DigWinNt: %s: Bad PE signature: %#x\n", pszName, pHdrs->vX_32.Signature)); return; } /* The file header is the same on both archs */ if (pHdrs->vX_32.FileHeader.Machine != (pThis->f32Bit ? IMAGE_FILE_MACHINE_I386 : IMAGE_FILE_MACHINE_AMD64)) { Log(("DigWinNt: %s: Invalid FH.Machine: %#x\n", pszName, pHdrs->vX_32.FileHeader.Machine)); return; } if (pHdrs->vX_32.FileHeader.SizeOfOptionalHeader != (pThis->f32Bit ? sizeof(IMAGE_OPTIONAL_HEADER32) : sizeof(IMAGE_OPTIONAL_HEADER64))) { Log(("DigWinNt: %s: Invalid FH.SizeOfOptionalHeader: %#x\n", pszName, pHdrs->vX_32.FileHeader.SizeOfOptionalHeader)); return; } const uint32_t TimeDateStamp = pHdrs->vX_32.FileHeader.TimeDateStamp; /* The optional header is not... */ if (WINNT_UNION(pThis, pHdrs, OptionalHeader.Magic) != (pThis->f32Bit ? IMAGE_NT_OPTIONAL_HDR32_MAGIC : IMAGE_NT_OPTIONAL_HDR64_MAGIC)) { Log(("DigWinNt: %s: Invalid OH.Magic: %#x\n", pszName, WINNT_UNION(pThis, pHdrs, OptionalHeader.Magic))); return; } if (WINNT_UNION(pThis, pHdrs, OptionalHeader.SizeOfImage) != cbImage) { Log(("DigWinNt: %s: Invalid OH.SizeOfImage: %#x, expected %#x\n", pszName, WINNT_UNION(pThis, pHdrs, OptionalHeader.SizeOfImage), cbImage)); return; } if (WINNT_UNION(pThis, pHdrs, OptionalHeader.NumberOfRvaAndSizes) != IMAGE_NUMBEROF_DIRECTORY_ENTRIES) { Log(("DigWinNt: %s: Invalid OH.SizeOfImage: %#x\n", pszName, WINNT_UNION(pThis, pHdrs, OptionalHeader.NumberOfRvaAndSizes))); return; } uint32_t uRvaDebugDir = 0; uint32_t cbDebugDir = 0; IMAGE_DATA_DIRECTORY const *pDir = &WINNT_UNION(pThis, pHdrs, OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]); if ( pDir->VirtualAddress > offHdrs && pDir->VirtualAddress < cbImage && pDir->Size >= sizeof(IMAGE_DEBUG_DIRECTORY) && pDir->Size < cbImage && pDir->VirtualAddress + pDir->Size <= cbImage ) { uRvaDebugDir = pDir->VirtualAddress; cbDebugDir = pDir->Size; } /* dig into the section table... */ /* * Create the module. */ RTDBGMOD hMod; int rc = RTDbgModCreate(&hMod, pszName, cbImage, 0 /*fFlags*/); if (RT_FAILURE(rc)) return; rc = RTDbgModSetTag(hMod, DIG_WINNT_MOD_TAG); AssertRC(rc); /* temp hack: */ rc = RTDbgModSymbolAdd(hMod, "start", 0 /*iSeg*/, 0, cbImage, 0 /*fFlags*/, NULL); AssertRC(rc); /* add sections? */ /* * Dig out debug info if possible. What we're after is the CODEVIEW part. */ if (uRvaDebugDir != 0) { DBGFADDRESS Addr = *pImageAddr; DBGFR3AddrAdd(&Addr, uRvaDebugDir); rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, &Addr, pbBuf, RT_MIN(cbDebugDir, cbBuf)); if (RT_SUCCESS(rc)) { IMAGE_DEBUG_DIRECTORY const *pa = (IMAGE_DEBUG_DIRECTORY const *)pbBuf; size_t c = RT_MIN(RT_MIN(cbDebugDir, cbBuf) / sizeof(*pa), 10); for (uint32_t i = 0; i < c; i++) if ( pa[i].AddressOfRawData > offHdrs && pa[i].AddressOfRawData < cbImage && pa[i].SizeOfData < cbImage && pa[i].AddressOfRawData + pa[i].SizeOfData <= cbImage && pa[i].TimeDateStamp == TimeDateStamp /* too paranoid? */ && pa[i].Type == IMAGE_DEBUG_TYPE_CODEVIEW ) { } } } /* * Link the module. */ RTDBGAS hAs = DBGFR3AsResolveAndRetain(pVM, DBGF_AS_KERNEL); if (hAs != NIL_RTDBGAS) rc = RTDbgAsModuleLink(hAs, hMod, pImageAddr->FlatPtr, RTDBGASLINK_FLAGS_REPLACE /*fFlags*/); else rc = VERR_INTERNAL_ERROR; RTDbgModRelease(hMod); RTDbgAsRelease(hAs); } /** * @copydoc DBGFOSREG::pfnQueryInterface */ static DECLCALLBACK(void *) dbgDiggerWinNtQueryInterface(PVM pVM, void *pvData, DBGFOSINTERFACE enmIf) { return NULL; } /** * @copydoc DBGFOSREG::pfnQueryVersion */ static DECLCALLBACK(int) dbgDiggerWinNtQueryVersion(PVM pVM, void *pvData, char *pszVersion, size_t cchVersion) { 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", pThis->NtMajorVersion, pThis->NtMinorVersion, pszNtProductType); return VINF_SUCCESS; } /** * @copydoc DBGFOSREG::pfnTerm */ static DECLCALLBACK(void) dbgDiggerWinNtTerm(PVM pVM, void *pvData) { PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData; Assert(pThis->fValid); pThis->fValid = false; } /** * @copydoc DBGFOSREG::pfnRefresh */ static DECLCALLBACK(int) dbgDiggerWinNtRefresh(PVM pVM, void *pvData) { PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData; NOREF(pThis); Assert(pThis->fValid); /* * For now we'll flush and reload everything. */ RTDBGAS hDbgAs = DBGFR3AsResolveAndRetain(pVM, 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); } dbgDiggerWinNtTerm(pVM, pvData); return dbgDiggerWinNtInit(pVM, pvData); } /** * @copydoc DBGFOSREG::pfnInit */ static DECLCALLBACK(int) dbgDiggerWinNtInit(PVM pVM, 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. */ DBGFR3AddrFromFlat(pVM, &Addr, pThis->f32Bit ? NTKUSERSHAREDDATA_WINNT32 : NTKUSERSHAREDDATA_WINNT64); rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, &Addr, &u, PAGE_SIZE); if (RT_FAILURE(rc)) return 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; /* * Dig out the module chain. */ DBGFADDRESS AddrPrev = pThis->PsLoadedModuleListAddr; Addr = pThis->KernelMteAddr; do { /* Read the validate the MTE. */ NTMTE Mte; rc = DBGFR3MemRead(pVM, 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)) || WINNT_UNION(pThis, &Mte, SizeOfImage) > _1M*256 || WINNT_UNION(pThis, &Mte, EntryPoint) - WINNT_UNION(pThis, &Mte, DllBase) > WINNT_UNION(pThis, &Mte, SizeOfImage) ) { Log(("DigWinNt: Bad Mte at %RGv - EntryPoint=%llx SizeOfImage=%x DllBase=%llx\n", Addr.FlatPtr, WINNT_UNION(pThis, &Mte, EntryPoint), WINNT_UNION(pThis, &Mte, SizeOfImage), WINNT_UNION(pThis, &Mte, DllBase))); break; } /* Read the full name. */ DBGFADDRESS AddrName; DBGFR3AddrFromFlat(pVM, &AddrName, WINNT_UNION(pThis, &Mte, FullDllName.Buffer)); uint16_t cbName = WINNT_UNION(pThis, &Mte, FullDllName.Length); if (cbName < sizeof(u)) rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, &AddrName, &u, cbName); else rc = VERR_OUT_OF_RANGE; if (RT_FAILURE(rc)) { DBGFR3AddrFromFlat(pVM, &AddrName, WINNT_UNION(pThis, &Mte, BaseDllName.Buffer)); cbName = WINNT_UNION(pThis, &Mte, BaseDllName.Length); if (cbName < sizeof(u)) rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, &AddrName, &u, cbName); else rc = VERR_OUT_OF_RANGE; } if (RT_SUCCESS(rc)) { u.wsz[cbName/2] = '\0'; char *pszName; rc = RTUtf16ToUtf8(u.wsz, &pszName); if (RT_SUCCESS(rc)) { /* Read the start of the PE image and pass it along to a worker. */ DBGFADDRESS ImageAddr; DBGFR3AddrFromFlat(pVM, &ImageAddr, WINNT_UNION(pThis, &Mte, DllBase)); uint32_t cbImageBuf = RT_MIN(sizeof(u), WINNT_UNION(pThis, &Mte, SizeOfImage)); rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, &ImageAddr, &u, cbImageBuf); if (RT_SUCCESS(rc)) dbgDiggerWinNtProcessImage(pThis, pVM, pszName, &ImageAddr, WINNT_UNION(pThis, &Mte, SizeOfImage), &u.au8[0], sizeof(u)); RTStrFree(pszName); } } /* next */ AddrPrev = Addr; DBGFR3AddrFromFlat(pVM, &Addr, WINNT_UNION(pThis, &Mte, InLoadOrderLinks.Flink)); } while ( Addr.FlatPtr != pThis->KernelMteAddr.FlatPtr && Addr.FlatPtr != pThis->PsLoadedModuleListAddr.FlatPtr); pThis->fValid = true; return VINF_SUCCESS; } /** * @copydoc DBGFOSREG::pfnProbe */ static DECLCALLBACK(bool) dbgDiggerWinNtProbe(PVM pVM, 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]; } u; /* * Look for the MISYSPTE 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. */ CPUMMODE enmMode = DBGFR3CpuGetMode(pVM, 0 /*idCpu*/); if (enmMode == CPUMMODE_LONG) { /** @todo when 32-bit is working, add support for 64-bit windows nt. */ } else { DBGFADDRESS KernelAddr; for (DBGFR3AddrFromFlat(pVM, &KernelAddr, UINT32_C(0x80001000)); KernelAddr.FlatPtr < UINT32_C(0xffff0000); KernelAddr.FlatPtr += PAGE_SIZE) { int rc = DBGFR3MemScan(pVM, 0 /*idCpu*/, &KernelAddr, UINT32_C(0xffff0000) - KernelAddr.FlatPtr, 1, "MISYSPTE", sizeof("MISYSPTE") - 1, &KernelAddr); if (RT_FAILURE(rc)) break; DBGFR3AddrSub(&KernelAddr, KernelAddr.FlatPtr & PAGE_OFFSET_MASK); /* MZ + PE header. */ rc = DBGFR3MemRead(pVM, 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 <= 0x200) { 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 /** @todo need more ntoskrnl signs? */ ) { /* Find the MTE. */ NTMTE32 Mte; RT_ZERO(Mte); Mte.DllBase = KernelAddr.FlatPtr; Mte.EntryPoint = KernelAddr.FlatPtr + pHdrs->OptionalHeader.AddressOfEntryPoint; Mte.SizeOfImage = pHdrs->OptionalHeader.SizeOfImage; DBGFADDRESS HitAddr; rc = DBGFR3MemScan(pVM, 0 /*idCpu*/, &KernelAddr, UINT32_MAX - KernelAddr.FlatPtr, 4 /*align*/, &Mte.DllBase, 3 * sizeof(uint32_t), &HitAddr); while (RT_SUCCESS(rc)) { /* check the name. */ NTMTE32 Mte2; DBGFADDRESS MteAddr = HitAddr; rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, DBGFR3AddrSub(&MteAddr, RT_OFFSETOF(NTMTE32, DllBase)), &Mte2, sizeof(Mte2)); if ( RT_SUCCESS(rc) && Mte2.DllBase == Mte.DllBase && Mte2.EntryPoint == Mte.EntryPoint && Mte2.SizeOfImage == Mte.SizeOfImage && WINNT32_VALID_ADDRESS(Mte2.InLoadOrderLinks.Flink) && Mte2.InLoadOrderLinks.Blink > KernelAddr.FlatPtr /* list head inside ntoskrnl */ && Mte2.InLoadOrderLinks.Blink < KernelAddr.FlatPtr + Mte.SizeOfImage && WINNT32_VALID_ADDRESS(Mte2.BaseDllName.Buffer) && WINNT32_VALID_ADDRESS(Mte2.FullDllName.Buffer) && Mte2.BaseDllName.Length <= Mte2.BaseDllName.MaximumLength && Mte2.BaseDllName.Length == WINNT_KERNEL_BASE_NAME_LEN * 2 && Mte2.FullDllName.Length <= Mte2.FullDllName.MaximumLength && Mte2.FullDllName.Length <= 256 ) { rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, DBGFR3AddrFromFlat(pVM, &Addr, Mte2.BaseDllName.Buffer), u.wsz, Mte2.BaseDllName.Length); u.wsz[Mte2.BaseDllName.Length / 2] = '\0'; if ( RT_SUCCESS(rc) && ( !RTUtf16ICmp(u.wsz, g_wszKernelNames[0]) /* || !RTUtf16ICmp(u.wsz, g_wszKernelNames[1]) */ ) ) { NTMTE32 Mte3; rc = DBGFR3MemRead(pVM, 0 /*idCpu*/, DBGFR3AddrFromFlat(pVM, &Addr, Mte2.InLoadOrderLinks.Blink), &Mte3, RT_SIZEOFMEMB(NTMTE32, InLoadOrderLinks)); if ( RT_SUCCESS(rc) && Mte3.InLoadOrderLinks.Flink == MteAddr.FlatPtr && WINNT32_VALID_ADDRESS(Mte3.InLoadOrderLinks.Blink) ) { Log(("DigWinNt: MteAddr=%RGv KernelAddr=%RGv SizeOfImage=%x &PsLoadedModuleList=%RGv (32-bit)\n", MteAddr.FlatPtr, KernelAddr.FlatPtr, Mte2.SizeOfImage, Addr.FlatPtr)); pThis->KernelAddr = KernelAddr; pThis->KernelMteAddr = MteAddr; pThis->PsLoadedModuleListAddr = Addr; pThis->f32Bit = true; return true; } } } /* next */ DBGFR3AddrAdd(&HitAddr, 4); if (HitAddr.FlatPtr <= UINT32_C(0xfffff000)) rc = DBGFR3MemScan(pVM, 0 /*idCpu*/, &HitAddr, UINT32_MAX - HitAddr.FlatPtr, 4 /*align*/, &Mte.DllBase, 3 * sizeof(uint32_t), &HitAddr); else rc = VERR_DBGF_MEM_NOT_FOUND; } } } } } return false; } /** * @copydoc DBGFOSREG::pfnDestruct */ static DECLCALLBACK(void) dbgDiggerWinNtDestruct(PVM pVM, void *pvData) { } /** * @copydoc DBGFOSREG::pfnConstruct */ static DECLCALLBACK(int) dbgDiggerWinNtConstruct(PVM pVM, void *pvData) { PDBGDIGGERWINNT pThis = (PDBGDIGGERWINNT)pvData; pThis->fValid = false; pThis->f32Bit = false; pThis->enmVer = DBGDIGGERWINNTVER_UNKNOWN; 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, /* .u32EndMagic = */ DBGFOSREG_MAGIC };