/* $Id: dbgmodnm.cpp $ */ /** @file * IPRT - Debug Map Reader For NM Like Mapfiles. */ /* * Copyright (C) 2009-2020 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 * *********************************************************************************************************************************/ #include #include "internal/iprt.h" #include #include #include #include #include #include "internal/dbgmod.h" /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** * Instance data. */ typedef struct RTDBGMODNM { /** The debug container containing doing the real work. */ RTDBGMOD hCnt; } RTDBGMODNM; /** Pointer to instance data NM map reader. */ typedef RTDBGMODNM *PRTDBGMODNM; /** @interface_method_impl{RTDBGMODVTDBG,pfnUnwindFrame} */ static DECLCALLBACK(int) rtDbgModNm_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) rtDbgModNm_LineByAddr(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTINTPTR poffDisp, PRTDBGLINE pLineInfo) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModLineByAddr(pThis->hCnt, iSeg, off, poffDisp, pLineInfo); } /** @interface_method_impl{RTDBGMODVTDBG,pfnLineByOrdinal} */ static DECLCALLBACK(int) rtDbgModNm_LineByOrdinal(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGLINE pLineInfo) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModLineByOrdinal(pThis->hCnt, iOrdinal, pLineInfo); } /** @interface_method_impl{RTDBGMODVTDBG,pfnLineCount} */ static DECLCALLBACK(uint32_t) rtDbgModNm_LineCount(PRTDBGMODINT pMod) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModLineCount(pThis->hCnt); } /** @interface_method_impl{RTDBGMODVTDBG,pfnLineAdd} */ static DECLCALLBACK(int) rtDbgModNm_LineAdd(PRTDBGMODINT pMod, const char *pszFile, size_t cchFile, uint32_t uLineNo, uint32_t iSeg, RTUINTPTR off, uint32_t *piOrdinal) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; Assert(!pszFile[cchFile]); NOREF(cchFile); return RTDbgModLineAdd(pThis->hCnt, pszFile, uLineNo, iSeg, off, piOrdinal); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByAddr} */ static DECLCALLBACK(int) rtDbgModNm_SymbolByAddr(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, uint32_t fFlags, PRTINTPTR poffDisp, PRTDBGSYMBOL pSymInfo) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModSymbolByAddr(pThis->hCnt, iSeg, off, fFlags, poffDisp, pSymInfo); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByName} */ static DECLCALLBACK(int) rtDbgModNm_SymbolByName(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol, PRTDBGSYMBOL pSymInfo) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; Assert(!pszSymbol[cchSymbol]); NOREF(cchSymbol); return RTDbgModSymbolByName(pThis->hCnt, pszSymbol, pSymInfo); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolByOrdinal} */ static DECLCALLBACK(int) rtDbgModNm_SymbolByOrdinal(PRTDBGMODINT pMod, uint32_t iOrdinal, PRTDBGSYMBOL pSymInfo) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModSymbolByOrdinal(pThis->hCnt, iOrdinal, pSymInfo); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolCount} */ static DECLCALLBACK(uint32_t) rtDbgModNm_SymbolCount(PRTDBGMODINT pMod) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModSymbolCount(pThis->hCnt); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSymbolAdd} */ static DECLCALLBACK(int) rtDbgModNm_SymbolAdd(PRTDBGMODINT pMod, const char *pszSymbol, size_t cchSymbol, RTDBGSEGIDX iSeg, RTUINTPTR off, RTUINTPTR cb, uint32_t fFlags, uint32_t *piOrdinal) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; Assert(!pszSymbol[cchSymbol]); NOREF(cchSymbol); return RTDbgModSymbolAdd(pThis->hCnt, pszSymbol, iSeg, off, cb, fFlags, piOrdinal); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentByIndex} */ static DECLCALLBACK(int) rtDbgModNm_SegmentByIndex(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, PRTDBGSEGMENT pSegInfo) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModSegmentByIndex(pThis->hCnt, iSeg, pSegInfo); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentCount} */ static DECLCALLBACK(RTDBGSEGIDX) rtDbgModNm_SegmentCount(PRTDBGMODINT pMod) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModSegmentCount(pThis->hCnt); } /** @interface_method_impl{RTDBGMODVTDBG,pfnSegmentAdd} */ static DECLCALLBACK(int) rtDbgModNm_SegmentAdd(PRTDBGMODINT pMod, RTUINTPTR uRva, RTUINTPTR cb, const char *pszName, size_t cchName, uint32_t fFlags, PRTDBGSEGIDX piSeg) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; Assert(!pszName[cchName]); NOREF(cchName); return RTDbgModSegmentAdd(pThis->hCnt, uRva, cb, pszName, fFlags, piSeg); } /** @interface_method_impl{RTDBGMODVTDBG,pfnImageSize} */ static DECLCALLBACK(RTUINTPTR) rtDbgModNm_ImageSize(PRTDBGMODINT pMod) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModImageSize(pThis->hCnt); } /** @interface_method_impl{RTDBGMODVTDBG,pfnRvaToSegOff} */ static DECLCALLBACK(RTDBGSEGIDX) rtDbgModNm_RvaToSegOff(PRTDBGMODINT pMod, RTUINTPTR uRva, PRTUINTPTR poffSeg) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; return RTDbgModRvaToSegOff(pThis->hCnt, uRva, poffSeg); } /** @interface_method_impl{RTDBGMODVTDBG,pfnClose} */ static DECLCALLBACK(int) rtDbgModNm_Close(PRTDBGMODINT pMod) { PRTDBGMODNM pThis = (PRTDBGMODNM)pMod->pvDbgPriv; RTDbgModRelease(pThis->hCnt); pThis->hCnt = NIL_RTDBGMOD; RTMemFree(pThis); return VINF_SUCCESS; } /** * Scans a NM-like map file. * * This implements both passes to avoid code duplication. * * @returns IPRT status code. * @param pThis The instance data. * @param pStrm The stream. * @param fAddSymbols false in the first pass, true in the second. */ static int rtDbgModNmScanFile(PRTDBGMODNM pThis, PRTSTREAM pStrm, bool fAddSymbols) { /* * Try parse the stream. */ RTUINTPTR SegZeroRva = fAddSymbols ? RTDbgModSegmentRva(pThis->hCnt, 0/*iSeg*/) : 0; char szSym[RTDBG_SYMBOL_NAME_LENGTH] = ""; size_t cchMod = 0; size_t offSym = 0; unsigned cchAddr = 0; uint64_t u64Low = UINT64_MAX; uint64_t u64High = 0; int fWithType = -1; char szLine[512]; int rc; while (RT_SUCCESS(rc = RTStrmGetLine(pStrm, szLine, sizeof(szLine)))) { char chType; if (RT_C_IS_XDIGIT(szLine[0])) { /* * This is really what C was made for, string parsing. */ /* The symbol value (address). */ uint64_t u64Addr; char *psz; rc = RTStrToUInt64Ex(szLine, &psz, 16, &u64Addr); if (rc != VWRN_TRAILING_CHARS) return VERR_DBG_NOT_NM_MAP_FILE; /* Check the address width. */ if (cchAddr == 0) cchAddr = psz == &szLine[8] ? 8 : 16; if (psz != &szLine[cchAddr]) return VERR_DBG_NOT_NM_MAP_FILE; /* Get the type and check for single space before symbol. */ char *pszName; if (fWithType < 0) fWithType = RT_C_IS_BLANK(szLine[cchAddr + 2]) ? 1 : 0; /* have type? Linux 2.4 /proc/ksyms doesn't. */ if (fWithType) { chType = szLine[cchAddr + 1]; pszName = &szLine[cchAddr + 3]; if ( RT_C_IS_BLANK(chType) || !RT_C_IS_BLANK(szLine[cchAddr + 2]) || RT_C_IS_BLANK(szLine[cchAddr + 3])) return VERR_DBG_NOT_NM_MAP_FILE; } else { chType = 'T'; pszName = &szLine[cchAddr + 1]; } /* Find the end of the symbol name. */ char *pszNameEnd = pszName; char ch; while ((ch = *pszNameEnd) != '\0' && !RT_C_IS_SPACE(ch)) pszNameEnd++; /* Any module name (linux /proc/kallsyms) following in brackets? */ char *pszModName = pszNameEnd; char *pszModNameEnd = pszModName; if (*pszModName) { *pszModName++ = '\0'; pszModNameEnd = pszModName = RTStrStripL(pszModName); if (*pszModName != '\0') { if (*pszModName != '[') return VERR_DBG_NOT_LINUX_KALLSYMS; pszModNameEnd = ++pszModName; while ((ch = *pszModNameEnd) != '\0' && ch != ']') pszModNameEnd++; if (ch != ']') return VERR_DBG_NOT_LINUX_KALLSYMS; char *pszEnd = pszModNameEnd + 1; if ((size_t)(pszModNameEnd - pszModName) >= 128) /* lazy bird */ return VERR_DBG_NOT_LINUX_KALLSYMS; *pszModNameEnd = '\0'; if (*pszEnd) pszEnd = RTStrStripL(pszEnd); if (*pszEnd) return VERR_DBG_NOT_LINUX_KALLSYMS; } } /* * Did the module change? Then update the symbol prefix. */ if ( cchMod != (size_t)(pszModNameEnd - pszModName) || memcmp(pszModName, szSym, cchMod)) { cchMod = pszModNameEnd - pszModName; if (cchMod == 0) offSym = 0; else { memcpy(szSym, pszModName, cchMod); szSym[cchMod] = '.'; offSym = cchMod + 1; } szSym[offSym] = '\0'; } /* * Validate the type and add the symbol if it's a type we care for. */ uint32_t fFlags = 0; RTDBGSEGIDX iSegSym = 0; switch (chType) { /* absolute */ case 'a': case '?': /* /proc/kallsyms */ iSegSym = RTDBGSEGIDX_ABS; /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL; break; case 'A': iSegSym = RTDBGSEGIDX_ABS; /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC; break; case 'b': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL; break; case 'B': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC; break; case 'c': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL | RTDBG_SYM_FLAGS_COMMON; break; case 'C': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC | RTDBG_SYM_FLAGS_COMMON; break; case 'd': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL; break; case 'D': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC; break; case 'g': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL; break; case 'G': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC; break; case 'i': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL; break; case 'I': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC; break; case 'r': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL | RTDBG_SYM_FLAGS_CONST; break; case 'R': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC | RTDBG_SYM_FLAGS_CONST; break; case 's': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL; break; case 'S': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC; break; case 't': /// @todo fFlags |= RTDBG_SYM_FLAGS_LOCAL | RTDBG_SYM_FLAGS_TEXT; break; case 'T': /// @todo fFlags |= RTDBG_SYM_FLAGS_PUBLIC | RTDBG_SYM_FLAGS_TEXT; break; case 'w': /// @todo fFlags |= RTDBG_SYM_FLAGS_WEAK | RTDBG_SYM_FLAGS_LOCAL; //??? break; case 'W': /// @todo fFlags |= RTDBG_SYM_FLAGS_WEAK | RTDBG_SYM_FLAGS_PUBLIC; break; case 'N': /* debug */ case 'n': case '-': /* stabs */ case 'u': /* undefined (/proc/kallsyms) */ case 'U': case 'v': /* weakext */ case 'V': iSegSym = NIL_RTDBGSEGIDX; break; default: return VERR_DBG_NOT_NM_MAP_FILE; } if (iSegSym != NIL_RTDBGSEGIDX) { if (fAddSymbols) { size_t cchName = pszNameEnd - pszName; if (cchName >= sizeof(szSym) - offSym) cchName = sizeof(szSym) - offSym - 1; memcpy(&szSym[offSym], pszName, cchName + 1); if (iSegSym == 0) rc = RTDbgModSymbolAdd(pThis->hCnt, szSym, iSegSym, u64Addr - SegZeroRva, 0/*cb*/, fFlags, NULL); else rc = RTDbgModSymbolAdd(pThis->hCnt, szSym, iSegSym, u64Addr, 0/*cb*/, fFlags, NULL); if ( RT_FAILURE(rc) && rc != VERR_DBG_DUPLICATE_SYMBOL && rc != VERR_DBG_ADDRESS_CONFLICT) /* (don't be too strict) */ return rc; } /* Track segment span. */ if (iSegSym == 0) { if (u64Low > u64Addr) u64Low = u64Addr; if (u64High < u64Addr) u64High = u64Addr; } } } else { /* * This is either a blank line or a symbol without an address. */ RTStrStripR(szLine); if (szLine[0]) { size_t cch = strlen(szLine); if (cchAddr == 0) cchAddr = cch < 16+3 || szLine[8+1] != ' ' ? 8 : 16; if (cch < cchAddr+3+1) return VERR_DBG_NOT_NM_MAP_FILE; chType = szLine[cchAddr + 1]; if ( chType != 'U' && chType != 'w') return VERR_DBG_NOT_NM_MAP_FILE; char *pszType = RTStrStripL(szLine); if (pszType != &szLine[cchAddr + 1]) return VERR_DBG_NOT_NM_MAP_FILE; if (!RT_C_IS_BLANK(szLine[cchAddr + 2])) return VERR_DBG_NOT_NM_MAP_FILE; } /* else: blank - ignored */ } } /* * The final segment. */ if (rc == VERR_EOF) { if (fAddSymbols) rc = VINF_SUCCESS; else { if ( u64Low != UINT64_MAX || u64High != 0) rc = RTDbgModSegmentAdd(pThis->hCnt, u64Low, u64High - u64Low + 1, "main", 0, NULL); else /* No sensible symbols... throw an error instead? */ rc = RTDbgModSegmentAdd(pThis->hCnt, 0, 0, "main", 0, NULL); } } return rc; } /** @interface_method_impl{RTDBGMODVTDBG,pfnTryOpen} */ static DECLCALLBACK(int) rtDbgModNm_TryOpen(PRTDBGMODINT pMod, RTLDRARCH enmArch) { NOREF(enmArch); /* * Fend off images. */ if ( !pMod->pszDbgFile || pMod->pImgVt) return VERR_DBG_NO_MATCHING_INTERPRETER; /* * Try open the file and create an instance. */ PRTSTREAM pStrm; int rc = RTStrmOpen(pMod->pszDbgFile, "r", &pStrm); if (RT_SUCCESS(rc)) { PRTDBGMODNM pThis = (PRTDBGMODNM)RTMemAlloc(sizeof(*pThis)); if (pThis) { rc = RTDbgModCreate(&pThis->hCnt, pMod->pszName, 0 /*cbSeg*/, 0 /*fFlags*/); if (RT_SUCCESS(rc)) { /* * Scan the file twice, first to figure the segment * sizes, then to add the symbol. */ rc = rtDbgModNmScanFile(pThis, pStrm, false /*fAddSymbols*/); if (RT_SUCCESS(rc)) rc = RTStrmRewind(pStrm); if (RT_SUCCESS(rc)) rc = rtDbgModNmScanFile(pThis, pStrm, true /*fAddSymbols*/); if (RT_SUCCESS(rc)) { RTStrmClose(pStrm); pMod->pvDbgPriv = pThis; return rc; } } RTDbgModRelease(pThis->hCnt); RTMemFree(pThis); } else rc = VERR_NO_MEMORY; RTStrmClose(pStrm); } return rc; } /** Virtual function table for the NM-like map file reader. */ DECL_HIDDEN_CONST(RTDBGMODVTDBG) const g_rtDbgModVtDbgNm = { /*.u32Magic = */ RTDBGMODVTDBG_MAGIC, /*.fSupports = */ RT_DBGTYPE_MAP, /*.pszName = */ "nm", /*.pfnTryOpen = */ rtDbgModNm_TryOpen, /*.pfnClose = */ rtDbgModNm_Close, /*.pfnRvaToSegOff = */ rtDbgModNm_RvaToSegOff, /*.pfnImageSize = */ rtDbgModNm_ImageSize, /*.pfnSegmentAdd = */ rtDbgModNm_SegmentAdd, /*.pfnSegmentCount = */ rtDbgModNm_SegmentCount, /*.pfnSegmentByIndex = */ rtDbgModNm_SegmentByIndex, /*.pfnSymbolAdd = */ rtDbgModNm_SymbolAdd, /*.pfnSymbolCount = */ rtDbgModNm_SymbolCount, /*.pfnSymbolByOrdinal = */ rtDbgModNm_SymbolByOrdinal, /*.pfnSymbolByName = */ rtDbgModNm_SymbolByName, /*.pfnSymbolByAddr = */ rtDbgModNm_SymbolByAddr, /*.pfnLineAdd = */ rtDbgModNm_LineAdd, /*.pfnLineCount = */ rtDbgModNm_LineCount, /*.pfnLineByOrdinal = */ rtDbgModNm_LineByOrdinal, /*.pfnLineByAddr = */ rtDbgModNm_LineByAddr, /*.pfnUnwindFrame = */ rtDbgModNm_UnwindFrame, /*.u32EndMagic = */ RTDBGMODVTDBG_MAGIC };