diff options
Diffstat (limited to 'src/VBox/Runtime/common/dbg/dbgmodmapsym.cpp')
| -rw-r--r-- | src/VBox/Runtime/common/dbg/dbgmodmapsym.cpp | 609 |
1 files changed, 609 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/dbg/dbgmodmapsym.cpp b/src/VBox/Runtime/common/dbg/dbgmodmapsym.cpp new file mode 100644 index 00000000..71fc3b4d --- /dev/null +++ b/src/VBox/Runtime/common/dbg/dbgmodmapsym.cpp @@ -0,0 +1,609 @@ +/* $Id: dbgmodmapsym.cpp $ */ +/** @file + * IPRT - Debug Map Reader for MAPSYM files (used by SYMDBG from old MASM). + * + * MAPSYM is was the tool producing these files from linker map files for + * use with SYMDBG (which shipped with MASM 3.0 (possibly earlier)), the OS/2 + * kernel debugger, and other tools. The format is very limited and they had + * to strip down the os2krnl.map file in later years to keep MAPSYM happy. + */ + +/* + * Copyright (C) 2009-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define LOG_GROUP RTLOGGROUP_DBG +#include <iprt/dbg.h> +#include "internal/iprt.h" + +#include <iprt/err.h> +#include <iprt/ctype.h> +#include <iprt/file.h> +#include <iprt/log.h> +#include <iprt/mem.h> +#include <iprt/stream.h> +#include <iprt/string.h> +#include "internal/dbgmod.h" + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** @name MAPSYM structures and constants. + * @{ */ + +/** MAPSYM: Header structure. */ +typedef struct MAPSYMHDR +{ + uint16_t off16NextMap; /**< 0x00: Offset of the next map divided by 16. */ + uint8_t bFlags; /**< 0x02: Who really knows... */ + uint8_t bReserved; /**< 0x03: Reserved / unknown. */ + uint16_t uSegEntry; /**< 0x04: Some entrypoint/segment thing we don't care about. */ + uint16_t cConsts; /**< 0x06: Constants referenced by offConstDef. */ + uint16_t offConstDef; /**< 0x08: Offset to head of constant chain. Not div 16? */ + uint16_t cSegs; /**< 0x0a: Number of segments in the map. */ + uint16_t off16SegDef; /**< 0x0c: Offset of the segment defintions divided by 16. */ + uint8_t cchMaxSym; /**< 0x0e: Maximum symbol-name length. */ + uint8_t cchModule; /**< 0x0f: Length of the module name. */ + char achModule[RT_FLEXIBLE_ARRAY]; /**< 0x10: Module name, length given by cchModule. */ +} MAPSYMHDR; + +/** MAPSYM: Tail structure. */ +typedef struct MAPSYMTAIL +{ + uint16_t offNextMap; /**< 0x00: Always zero (it's the tail, see). */ + uint8_t bRelease; /**< 0x02: Minor version number. */ + uint8_t bVersion; /**< 0x03: Major version number. */ +} MAPSYMTAIL; + +/** MAPSYM: Segment defintion. */ +typedef struct MAPSYMSEGDEF +{ + uint16_t off16NextSeg; /**< 0x00: Offset of the next segment divided by 16. */ + uint16_t cSymbols; /**< 0x02: Number of symbol offsets . */ + uint16_t offSymbolOffsets; /**< 0x04: Offset of the symbol offset table. Each entry is a 16-bit value giving + * the offset symbol relative to this structure. */ + uint16_t au16Reserved0[4]; /**< 0x06: Reserved / unknown. + * First byte/word seems to be 1-based segment number. */ + uint8_t bFlags; /**< 0x0e: MAPSYMSEGDEF_F_32BIT or zero. */ + uint8_t bReserved1; /**< 0x0f: Reserved / unknown. */ + uint16_t offLineDef; /**< 0x10: Offset to the line defintions. */ + uint16_t u16Reserved2; /**< 0x12: Reserved / unknown. Often seen holding 0xff00. */ + uint8_t cchSegName; /**< 0x14: Segment name length. */ + char achSegName[RT_FLEXIBLE_ARRAY]; /**< 0x15: Segment name, length given by cchSegName. */ +} MAPSYMSEGDEF; + +#define MAPSYMSEGDEF_F_32BIT UINT8_C(0x01) /**< Indicates 32-bit segment rather than 16-bit, relevant for symbols. */ +#define MAPSYMSEGDEF_F_UNKNOWN UINT8_C(0x02) /**< Set on all segments in os2krnlr.sym from ACP2. */ + +/** MAPSYM: 16-bit symbol */ +typedef struct MAPSYMSYMDEF16 +{ + uint16_t uValue; /**< 0x00: The symbol value (address). */ + uint8_t cchName; /**< 0x02: Symbol name length. */ + char achName[1]; /**< 0x03: The symbol name, length give by cchName. */ +} MAPSYMSYMDEF16; + +/** MAPSYM: 16-bit symbol */ +typedef struct MAPSYMSYMDEF32 +{ + uint32_t uValue; /**< 0x00: The symbol value (address). */ + uint8_t cchName; /**< 0x04: Symbol name length. */ + char achName[1]; /**< 0x05: The symbol name, length give by cchName. */ +} MAPSYMSYMDEF32; + +/** MAPSYM: Line number defintions. */ +typedef struct MAPSYMLINEDEF +{ + uint16_t off16NextLine; /**< 0x00: Offset to the next line defintion divided by 16. */ + uint16_t uSegment; /**< 0x02: Guessing this must be segment number. */ + uint16_t offLines; /**< 0x04: Offset to the line number array, relative to this structure. */ + uint16_t cLines; /**< 0x08: Number of line numbers in the array. */ + uint8_t cchSrcFile; /**< 0x0a: Length of source filename. */ + char achSrcFile[RT_FLEXIBLE_ARRAY]; /**< 0x0b: Source filename, length given by cchSrcFile. */ +} MAPSYMLINEDEF; + +/** MAPSYM: 16-bit line numbers. */ +typedef struct MAPSYMLINENO16 +{ + uint16_t offSeg; + uint16_t uLineNo; +} MAPSYMLINENO16; + +/** @} */ + + +/********************************************************************************************************************************* +* Defined Constants And Macros * +*********************************************************************************************************************************/ +/** Maximum number of segments we expect in a MAPSYM file. */ +#define RTDBGMODMAPSYM_MAX_SEGMENTS 256 + + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnUnwindFrame} */ +static DECLCALLBACK(int) rtDbgModMapSym_UnwindFrame(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTDBGUNWINDSTATE pState) +{ + RT_NOREF(pMod, iSeg, off, pState); + return VERR_DBG_NO_UNWIND_INFO; +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnLineByAddr} */ +static DECLCALLBACK(int) rtDbgModMapSym_LineByAddr(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, + PRTINTPTR poffDisp, PRTDBGLINE pLineInfo) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModLineByAddr(hCnt, iSeg, off, poffDisp, pLineInfo); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnLineByOrdinal} */ +static DECLCALLBACK(int) rtDbgModMapSym_LineByOrdinal(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGLINE pLineInfo) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModLineByOrdinal(hCnt, iOrdinal, pLineInfo); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnLineCount} */ +static DECLCALLBACK(uint32_t) rtDbgModMapSym_LineCount(PRTDBGMODINT pMod) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModLineCount(hCnt); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnLineAdd} */ +static DECLCALLBACK(int) rtDbgModMapSym_LineAdd(PRTDBGMODINT pMod, const char *pszFile, size_t cchFile, uint32_t uLineNo, + uint32_t iSeg, RTUINTPTR off, uint32_t *piOrdinal) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + Assert(!pszFile[cchFile]); NOREF(cchFile); + return RTDbgModLineAdd(hCnt, pszFile, uLineNo, iSeg, off, piOrdinal); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByAddr} */ +static DECLCALLBACK(int) rtDbgModMapSym_SymbolByAddr(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, uint32_t fFlags, + PRTINTPTR poffDisp, PRTDBGSYMBOL pSymInfo) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModSymbolByAddr(hCnt, iSeg, off, fFlags, poffDisp, pSymInfo); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByName} */ +static DECLCALLBACK(int) rtDbgModMapSym_SymbolByName(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol, + PRTDBGSYMBOL pSymInfo) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + Assert(!pszSymbol[cchSymbol]); NOREF(cchSymbol); + return RTDbgModSymbolByName(hCnt, pszSymbol, pSymInfo); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByOrdinal} */ +static DECLCALLBACK(int) rtDbgModMapSym_SymbolByOrdinal(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGSYMBOL pSymInfo) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModSymbolByOrdinal(hCnt, iOrdinal, pSymInfo); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolCount} */ +static DECLCALLBACK(uint32_t) rtDbgModMapSym_SymbolCount(PRTDBGMODINT pMod) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModSymbolCount(hCnt); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolAdd} */ +static DECLCALLBACK(int) rtDbgModMapSym_SymbolAdd(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol, + RTDBGSEGIDX iSeg, RTUINTPTR off, RTUINTPTR cb, uint32_t fFlags, + uint32_t *piOrdinal) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + Assert(!pszSymbol[cchSymbol]); NOREF(cchSymbol); + return RTDbgModSymbolAdd(hCnt, pszSymbol, iSeg, off, cb, fFlags, piOrdinal); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentByIndex} */ +static DECLCALLBACK(int) rtDbgModMapSym_SegmentByIndex(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, PRTDBGSEGMENT pSegInfo) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModSegmentByIndex(hCnt, iSeg, pSegInfo); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentCount} */ +static DECLCALLBACK(RTDBGSEGIDX) rtDbgModMapSym_SegmentCount(PRTDBGMODINT pMod) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModSegmentCount(hCnt); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentAdd} */ +static DECLCALLBACK(int) rtDbgModMapSym_SegmentAdd(PRTDBGMODINT pMod, RTUINTPTR uRva, RTUINTPTR cb, const char *pszName, + size_t cchName, uint32_t fFlags, PRTDBGSEGIDX piSeg) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + Assert(!pszName[cchName]); NOREF(cchName); + return RTDbgModSegmentAdd(hCnt, uRva, cb, pszName, fFlags, piSeg); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnImageSize} */ +static DECLCALLBACK(RTUINTPTR) rtDbgModMapSym_ImageSize(PRTDBGMODINT pMod) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModImageSize(hCnt); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnRvaToSegOff} */ +static DECLCALLBACK(RTDBGSEGIDX) rtDbgModMapSym_RvaToSegOff(PRTDBGMODINT pMod, RTUINTPTR uRva, PRTUINTPTR poffSeg) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + return RTDbgModRvaToSegOff(hCnt, uRva, poffSeg); +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnClose} */ +static DECLCALLBACK(int) rtDbgModMapSym_Close(PRTDBGMODINT pMod) +{ + RTDBGMOD hCnt = (RTDBGMOD)pMod->pvDbgPriv; + RTDbgModRelease(hCnt); + pMod->pvDbgPriv = NULL; + return VINF_SUCCESS; +} + + +/** + * Validate the module header. + * + * @returns true if valid, false if not. + * @param pHdr The header. + * @param cbAvail How much we've actually read. + * @param cbFile The file size (relative to module header). + */ +static bool rtDbgModMapSymIsValidHeader(MAPSYMHDR const *pHdr, size_t cbAvail, uint64_t cbFile) +{ + if (cbAvail <= RT_UOFFSETOF(MAPSYMHDR, achModule)) + return false; + + if (pHdr->cSegs == 0) + return false; + if (pHdr->cSegs > RTDBGMODMAPSYM_MAX_SEGMENTS) + return false; + + if (pHdr->off16SegDef == 0) + return false; + if (pHdr->off16SegDef * (uint32_t)16 >= cbFile) + return false; + + if (pHdr->cchModule == 0) + return false; + if (pHdr->cchModule > 128) /* Note must be smaller than abPadding below in caller */ + return false; + + size_t cchMaxName = cbAvail - RT_UOFFSETOF(MAPSYMHDR, achModule); + if (pHdr->cchModule > cchMaxName) + return false; + + for (uint32_t i = 0; i < pHdr->cchModule; i++) + { + unsigned char const uch = pHdr->achModule[i]; + if ( uch < 0x20 + || uch >= 0x7f) + return false; + } + + return true; +} + + +/** + * Validate the given segment definition. + * + * @returns true if valid, false if not. + * @param pSegDef The segment definition structure. + * @param cbMax Host many bytes are available starting with pSegDef. + */ +static bool rtDbgModMapSymIsValidSegDef(MAPSYMSEGDEF const *pSegDef, size_t cbMax) +{ + if (RT_UOFFSETOF(MAPSYMSEGDEF, achSegName) > cbMax) + return false; + if (pSegDef->cSymbols) + { + if (pSegDef->cSymbols > _32K) + { + Log(("rtDbgModMapSymIsValidSegDef: Too many symbols: %#x\n", pSegDef->cSymbols)); + return false; + } + + if (pSegDef->offSymbolOffsets + (uint32_t)2 * pSegDef->cSymbols > cbMax) + { + Log(("rtDbgModMapSymIsValidSegDef: Bad symbol offset/count: %#x/%#x\n", pSegDef->offSymbolOffsets, pSegDef->cSymbols)); + return false; + } + } + + size_t cchMaxName = cbMax - RT_UOFFSETOF(MAPSYMHDR, achModule); + if (pSegDef->cchSegName > cchMaxName) + { + Log(("rtDbgModMapSymIsValidSegDef: Bad segment name length\n")); + return false; + } + + for (uint32_t i = 0; i < pSegDef->cchSegName; i++) + { + unsigned char uch = pSegDef->achSegName[i]; + if ( uch < 0x20 + || uch >= 0x7f) + { + Log(("rtDbgModMapSymIsValidSegDef: Bad segment name: %.*Rhxs\n", pSegDef->cchSegName, pSegDef->achSegName)); + return false; + } + } + + return true; +} + + +/** + * Fills @a hCnt with segments and symbols from the MAPSYM file. + * + * @note We only support reading the first module, right now. + */ +static int rtDbgModMapSymReadIt(RTDBGMOD hCnt, uint8_t const *pbFile, size_t cbFile) +{ + /* + * Revalidate the header. + */ + MAPSYMHDR const *pHdr = (MAPSYMHDR const *)pbFile; + if (!rtDbgModMapSymIsValidHeader(pHdr, cbFile, cbFile)) + return VERR_DBG_NO_MATCHING_INTERPRETER; + Log(("rtDbgModMapSymReadIt: szModule='%.*s' cSegs=%u off16NextMap=%#x\n", + pHdr->cchModule, pHdr->achModule, pHdr->cSegs, pHdr->off16NextMap)); + + /* + * Load each segment. + */ + uint32_t uRva = 0; + uint32_t const cSegs = pHdr->cSegs; + uint32_t offSegment = pHdr->off16SegDef * (uint32_t)16; + for (uint32_t iSeg = 0; iSeg < cSegs; iSeg++) + { + if (offSegment >= cbFile) + return VERR_DBG_NO_MATCHING_INTERPRETER; + + size_t const cbMax = cbFile - offSegment; + MAPSYMSEGDEF const *pSegDef = (MAPSYMSEGDEF const *)&pbFile[offSegment]; + if (!rtDbgModMapSymIsValidSegDef(pSegDef, cbMax)) + return VERR_DBG_NO_MATCHING_INTERPRETER; + + Log(("rtDbgModMapSymReadIt: Segment #%u: flags=%#x name='%.*s' symbols=%#x @ %#x next=%#x lines=@%#x (reserved: %#x %#x %#x %#x %#x %#x)\n", + iSeg, pSegDef->bFlags, pSegDef->cchSegName, pSegDef->achSegName, pSegDef->cSymbols, pSegDef->offSymbolOffsets, + pSegDef->off16NextSeg, pSegDef->offLineDef, pSegDef->au16Reserved0[0], pSegDef->au16Reserved0[1], + pSegDef->au16Reserved0[2], pSegDef->au16Reserved0[3], pSegDef->bReserved1, pSegDef->u16Reserved2)); + + /* + * First symbol pass finds the largest symbol and uses that as the segment size. + */ + uint32_t cbSegmentEst = 0; + uint32_t const cSymbols = pSegDef->cSymbols; + uint16_t const * const paoffSymbols = (uint16_t const *)&pbFile[offSegment + pSegDef->offSymbolOffsets]; + bool const fIs32Bit = RT_BOOL(pSegDef->bFlags & MAPSYMSEGDEF_F_32BIT); + uint32_t const cbSymDef = fIs32Bit ? 4 + 1 : 2 + 1; + for (uint32_t iSymbol = 0; iSymbol < cSymbols; iSymbol++) + { + uint32_t off = paoffSymbols[iSymbol] + offSegment; + if (off + cbSymDef <= cbFile) + { + uint32_t uValue = fIs32Bit ? *(uint32_t const *)&pbFile[off] : (uint32_t)*(uint16_t const *)&pbFile[off]; + if (uValue > cbSegmentEst) + cbSegmentEst = uValue; + } + else + Log(("rtDbgModMapSymReadIt: Bad symbol offset %#x\n", off)); + } + + /* + * Add the segment. + */ + char szName[256]; + memcpy(szName, pSegDef->achSegName, pSegDef->cchSegName); + szName[pSegDef->cchSegName] = '\0'; + if (!pSegDef->cchSegName) + RTStrPrintf(szName, sizeof(szName), "seg%02u", iSeg); + + RTDBGSEGIDX idxDbgSeg = iSeg; + int rc = RTDbgModSegmentAdd(hCnt, uRva, cbSegmentEst, szName, 0 /*fFlags*/, &idxDbgSeg); + if (RT_FAILURE(rc)) + return rc; + + uRva += cbSegmentEst; + + /* + * The second symbol pass loads the symbol values and names. + */ + for (uint32_t iSymbol = 0; iSymbol < cSymbols; iSymbol++) + { + uint32_t off = paoffSymbols[iSymbol] + offSegment; + if (off + cbSymDef <= cbFile) + { + /* Get value: */ + uint32_t uValue = RT_MAKE_U16(pbFile[off], pbFile[off + 1]); + off += 2; + if (fIs32Bit) + { + uValue |= RT_MAKE_U32_FROM_U8(0, 0, pbFile[off], pbFile[off + 1]); + off += 2; + } + + /* Get name: */ + uint8_t cchName = pbFile[off++]; + if (off + cchName <= cbFile) + { + memcpy(szName, &pbFile[off], cchName); + szName[cchName] = '\0'; + RTStrPurgeEncoding(szName); + } + else + cchName = 0; + if (cchName == 0) + RTStrPrintf(szName, sizeof(szName), "unknown_%u_%u", iSeg, iSymbol); + + /* Try add it: */ + rc = RTDbgModSymbolAdd(hCnt, szName, idxDbgSeg, uValue, 0 /*cb*/, 0 /*fFlags*/, NULL /*piOrdinal*/); + if (RT_SUCCESS(rc)) + Log7(("rtDbgModMapSymReadIt: %02x:%06x %s\n", idxDbgSeg, uValue, szName)); + else if ( rc == VERR_DBG_DUPLICATE_SYMBOL + || rc == VERR_DBG_ADDRESS_CONFLICT + || rc == VERR_DBG_SYMBOL_NAME_OUT_OF_RANGE) + Log(("rtDbgModMapSymReadIt: %02x:%06x %s\n", idxDbgSeg, uValue, szName)); + else + { + Log(("rtDbgModMapSymReadIt: Unexpected RTDbgModSymbolAdd failure: %Rrc - %02x:%06x %s\n", + rc, idxDbgSeg, uValue, szName)); + return rc; + } + } + } + + /* Next segment */ + offSegment = pSegDef->off16NextSeg * (uint32_t)16; + } + return VINF_SUCCESS; +} + + +/** @interface_method_impl{RTDBGMODVTDBG,pfnTryOpen} */ +static DECLCALLBACK(int) rtDbgModMapSym_TryOpen(PRTDBGMODINT pMod, RTLDRARCH enmArch) +{ + NOREF(enmArch); + + /* + * Fend off images. + */ + if ( !pMod->pszDbgFile + || pMod->pImgVt) + return VERR_DBG_NO_MATCHING_INTERPRETER; + pMod->pvDbgPriv = NULL; + + /* + * Try open the file and check out the first header. + */ + RTFILE hFile; + int rc = RTFileOpen(&hFile, pMod->pszDbgFile, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_WRITE); + if (RT_SUCCESS(rc)) + { + uint64_t cbFile = 0; + rc = RTFileGetSize(hFile, &cbFile); + if ( RT_SUCCESS(rc) + && cbFile < _2M) + { + union + { + MAPSYMHDR Hdr; + char abPadding[sizeof(MAPSYMHDR) + 257]; /* rtDbgModMapSymIsValidHeader makes size assumptions. */ + } uBuf; + size_t cbToRead = (size_t)RT_MIN(cbFile, sizeof(uBuf)); + rc = RTFileReadAt(hFile, 0, &uBuf, RT_MIN(cbFile, sizeof(uBuf)), NULL); + if (RT_SUCCESS(rc)) + { + if (rtDbgModMapSymIsValidHeader(&uBuf.Hdr, cbToRead, cbFile)) + { + uBuf.Hdr.achModule[uBuf.Hdr.cchModule] = '\0'; + + /* + * Read the whole thing into memory, create an + * instance/container and load it with symbols. + */ + void *pvFile = NULL; + size_t cbFile2 = 0; + rc = RTFileReadAllByHandle(hFile, &pvFile, &cbFile2); + if (RT_SUCCESS(rc)) + { + RTDBGMOD hCnt; + rc = RTDbgModCreate(&hCnt, uBuf.Hdr.achModule, 0 /*cbSeg*/, 0 /*fFlags*/); + if (RT_SUCCESS(rc)) + { + rc = rtDbgModMapSymReadIt(hCnt, (uint8_t const *)pvFile, cbFile2); + if (RT_SUCCESS(rc)) + pMod->pvDbgPriv = hCnt; + else + RTDbgModRelease(hCnt); + } + RTFileReadAllFree(pvFile, cbFile2); + } + } + else + rc = VERR_DBG_NO_MATCHING_INTERPRETER; + } + } + RTFileClose(hFile); + } + Log(("rtDbgModMapSym_TryOpen: %s -> %Rrc, %p\n", pMod->pszDbgFile, rc, pMod->pvDbgPriv)); + return rc; +} + + + +/** Virtual function table for the MAPSYM file reader. */ +DECL_HIDDEN_CONST(RTDBGMODVTDBG) const g_rtDbgModVtDbgMapSym = +{ + /*.u32Magic = */ RTDBGMODVTDBG_MAGIC, + /*.fSupports = */ RT_DBGTYPE_SYM, + /*.pszName = */ "mapsym", + /*.pfnTryOpen = */ rtDbgModMapSym_TryOpen, + /*.pfnClose = */ rtDbgModMapSym_Close, + + /*.pfnRvaToSegOff = */ rtDbgModMapSym_RvaToSegOff, + /*.pfnImageSize = */ rtDbgModMapSym_ImageSize, + + /*.pfnSegmentAdd = */ rtDbgModMapSym_SegmentAdd, + /*.pfnSegmentCount = */ rtDbgModMapSym_SegmentCount, + /*.pfnSegmentByIndex = */ rtDbgModMapSym_SegmentByIndex, + + /*.pfnSymbolAdd = */ rtDbgModMapSym_SymbolAdd, + /*.pfnSymbolCount = */ rtDbgModMapSym_SymbolCount, + /*.pfnSymbolByOrdinal = */ rtDbgModMapSym_SymbolByOrdinal, + /*.pfnSymbolByName = */ rtDbgModMapSym_SymbolByName, + /*.pfnSymbolByAddr = */ rtDbgModMapSym_SymbolByAddr, + + /*.pfnLineAdd = */ rtDbgModMapSym_LineAdd, + /*.pfnLineCount = */ rtDbgModMapSym_LineCount, + /*.pfnLineByOrdinal = */ rtDbgModMapSym_LineByOrdinal, + /*.pfnLineByAddr = */ rtDbgModMapSym_LineByAddr, + + /*.pfnUnwindFrame = */ rtDbgModMapSym_UnwindFrame, + + /*.u32EndMagic = */ RTDBGMODVTDBG_MAGIC +}; + |