| 1 | /* $Id: $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * kProfile Mark 2 - Debug Info Reader, DbgHelp Base Reader.
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| 5 | *
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| 6 | * Copyright (c) 2006 knut st. osmundsen <bird-src-spam@anduin.net.de>
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| 7 | *
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| 8 | *
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| 9 | * This file is part of kLIBC.
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| 10 | *
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| 11 | * kLIBC is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * kLIBC is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with kLIBC; if not, write to the Free Software
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| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 24 | *
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*******************************************************************************
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| 29 | * Header Files *
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| 30 | *******************************************************************************/
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| 31 | #include <iprt/file.h>
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| 32 | #include <iprt/string.h>
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| 33 | #include <iprt/alloc.h>
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/asm.h>
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| 36 | #include <iprt/err.h>
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| 37 | #include <iprt/thread.h>
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| 38 | #include <iprt/alloca.h>
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| 39 | #include "DBGInternal.h"
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| 40 | #include "internal/ldrPE.h"
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| 41 |
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| 42 |
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| 43 |
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| 44 | /*******************************************************************************
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| 45 | * Structures and Typedefs *
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| 46 | *******************************************************************************/
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| 47 | /**
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| 48 | * A dbghelp based PE debug reader.
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| 49 | */
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| 50 | typedef struct RTDBGMODPE
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| 51 | {
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| 52 | /** The common module core. */
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| 53 | RTDBGMOD Core;
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| 54 | /** The image size. */
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| 55 | uint32_t cbImage;
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| 56 | /** The number of sections. (We've added the implicit header section.) */
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| 57 | int32_t cSections;
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| 58 | /** The section headers (variable size). The first section is the
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| 59 | * implicit header section.*/
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| 60 | IMAGE_SECTION_HEADER aSections[1];
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| 61 | } RTDBGMODPE, *PRTDBGMODPE;
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| 62 |
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| 63 |
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| 64 | /**
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| 65 | * Calcs the RVA for a segment:offset address.
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| 66 | *
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| 67 | * @returns IPRT status code.
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| 68 | *
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| 69 | * @param pModPe The PE debug module instance.
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| 70 | * @param iSegment The segment number. Special segments are dealt with as well.
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| 71 | * @param off The segment offset.
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| 72 | * @param puRVA Where to store the RVA on success.
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| 73 | */
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| 74 | static int rtDbgModPeSegOffToRVA(PRTDBGMODPE pModPe, int32_t iSegment, RTUINTPTR off, uint32_t *puRVA)
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| 75 | {
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| 76 | if (iSegment >= 0)
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| 77 | {
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| 78 | AssertMsgReturn(iSegment < pModPe->cSections, ("iSegment=%RX32 cSections=%RX32\n", iSegment, pModPe->cSections),
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| 79 | VERR_DBGMOD_INVALID_ADDRESS);
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| 80 | AssertMsgReturn(off < pModPe->aSections[iSegment].Misc.VirtualSize,
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| 81 | ("off=%RTptr VirtualSize=%RX32\n", off, pModPe->aSections[iSegment].Misc.VirtualSize),
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| 82 | VERR_DBGMOD_INVALID_ADDRESS);
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| 83 | *puRVA = pModPe->aSections[iSegment].VirtualAddress + off;
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| 84 | return VINF_SUCCESS;
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| 85 | }
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| 86 |
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| 87 | if (iSegment == RTDBGSEG_RVA)
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| 88 | {
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| 89 | AssertMsgReturn(off < pModPe->cbImage, ("off=%RTptr, cbImage=%RX32\n", off, pModPe->cbImage),
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| 90 | VERR_DBGMOD_INVALID_ADDRESS);
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| 91 | *puRVA = off;
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| 92 | return VINF_SUCCESS;
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| 93 | }
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| 94 | AssertMsgFailedReturn(("iSegment=%RI32\n", iSegment), VERR_DBGMOD_INVALID_ADDRESS);
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| 95 | }
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| 96 |
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| 97 |
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| 98 | /**
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| 99 | * Calcs the segment:offset address for a RVA.
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| 100 | *
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| 101 | * @returns IPRT status code.
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| 102 | *
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| 103 | * @param pModPe The PE debug module instance.
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| 104 | * @param uRVA The RVA.
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| 105 | * @param piSegment Where to store the segment number.
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| 106 | * @param poff Where to store the segment offset.
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| 107 | */
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| 108 | static int rtDbgModPeRVAToSegOff(PRTDBGMODPE pModPe, uint32_t uRVA, int32_t *piSegment, RTUINTPTR *poff)
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| 109 | {
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| 110 | AssertMsgReturn(uRVA < pModPe->cbImage, ("uRVA=%RX32, cbImage=%RX32\n", uRVA, pModPe->cbImage),
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| 111 | VERR_DBGMOD_INVALID_ADDRESS);
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| 112 | for (int32_t iSegment = 0; iSegment < pModPe->cSections; iSegment++)
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| 113 | {
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| 114 | /** @todo should probably be less strict about address in the alignment gaps. */
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| 115 | uint32_t off = uRVA - pModPe->aSections[iSegment].VirtualAddress;
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| 116 | if (off < pModPe->aSections[iSegment].Misc.VirtualSize)
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| 117 | {
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| 118 | *poff = off;
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| 119 | *piSegment = iSegment;
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| 120 | return VINF_SUCCESS;
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| 121 | }
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| 122 | }
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| 123 | AssertMsgFailedReturn(("uRVA=%RX32\n", uRVA), VERR_DBGMOD_INVALID_ADDRESS);
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| 124 | }
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| 125 |
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| 126 |
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| 127 | /**
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| 128 | * @copydoc RTDBGMODOPS::pfnQueryLine
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| 129 | */
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| 130 | static DECLCALLBACK(int) rtDbgModPEQueryLine(PRTDBGMOD pMod, int32_t iSegment, RTUINTPTR off, PRTDBGLINE pLine)
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| 131 | {
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| 132 | PRTDBGMODPE pModPe = (PRTDBGMODPE)pMod;
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| 133 |
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| 134 | /*
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| 135 | * Translate the address to an RVA.
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| 136 | */
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| 137 | uint32_t uRVA;
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| 138 | int rc = rtDbgModPeSegOffToRVA(pModPe, iSegment, off, &uRVA);
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| 139 | if (RT_SUCCESS(rc))
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| 140 | {
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| 141 | #if 0
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| 142 | DWORD64 off;
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| 143 | IMAGEHLP_LINE64 Line;
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| 144 | Line.SizeOfStruct = sizeof(Line);
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| 145 | if (g_pfnSymGetLineFromAddr64(pModPe->hSymInst, pModPe->ImageBase + uRVA, &off, &Line))
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| 146 | {
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| 147 | pLine->RVA = (RTUINTPTR)(Line.Address - pModPe->ImageBase);
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| 148 | rc = rtDbgModPeRVAToSegOff(pModPe, pLine->RVA, &pLine->iSegment, &pLine->offSegment);
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| 149 | pLine->iLine = Line.LineNumber;
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| 150 | pLine->cchFile = strlen(Line.FileName);
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| 151 | if (pLine->cchFile >= sizeof(pLine->szFile))
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| 152 | pLine->cchFile = sizeof(pLine->szFile) - 1;
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| 153 | memcpy(pLine->szFile, Line.FileName, pLine->cchFile + 1);
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| 154 | }
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| 155 | else
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| 156 | {
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| 157 | DWORD Err = GetLastError();
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| 158 | rc = RTErrConvertFromWin32(Err);
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| 159 | }
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| 160 | #endif
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| 161 | rc = VERR_NOT_IMPLEMENTED;
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| 162 | }
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| 163 | return rc;
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| 164 | }
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| 165 |
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| 166 |
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| 167 | /**
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| 168 | * @copydoc RTDBGMODOPS::pfnQuerySymbol
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| 169 | */
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| 170 | static DECLCALLBACK(int) rtDbgModPEQuerySymbol(PRTDBGMOD pMod, int32_t iSegment, RTUINTPTR off, PRTDBGSYMBOL pSym)
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| 171 | {
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| 172 | PRTDBGMODPE pModPe = (PRTDBGMODPE)pMod;
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| 173 |
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| 174 | /*
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| 175 | * Translate the address to an RVA.
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| 176 | */
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| 177 | uint32_t uRVA;
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| 178 | int rc = rtDbgModPeSegOffToRVA(pModPe, iSegment, off, &uRVA);
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| 179 | if (RT_SUCCESS(rc))
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| 180 | {
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| 181 | #if 0
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| 182 | DWORD64 off;
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| 183 | union
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| 184 | {
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| 185 | SYMBOL_INFO Sym;
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| 186 | char achBuffer[sizeof(SYMBOL_INFO) + RTDBG_SYMBOL_MAX];
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| 187 | } Buf;
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| 188 | Buf.Sym.SizeOfStruct = sizeof(SYMBOL_INFO);
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| 189 | Buf.Sym.MaxNameLen = RTDBG_SYMBOL_MAX;
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| 190 | if (g_pfnSymFromAddr(pModPe->hSymInst, pModPe->ImageBase + uRVA, &off, &Buf.Sym))
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| 191 | {
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| 192 | pSym->cb = Buf.Sym.Size;
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| 193 | pSym->fFlags = 0;
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| 194 | if (Buf.Sym.Flags & SYMFLAG_FUNCTION)
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| 195 | pSym->fFlags |= RTDBGSYM_FLAGS_CODE;
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| 196 | else if (Buf.Sym.Flags & SYMFLAG_CONSTANT)
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| 197 | pSym->fFlags |= RTDBGSYM_FLAGS_ABS; /** @todo SYMFLAG_CONSTANT must be tested - documentation is too brief to say what is really meant here.*/
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| 198 | else
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| 199 | pSym->fFlags |= RTDBGSYM_FLAGS_DATA;
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| 200 | if (Buf.Sym.Flags & SYMFLAG_EXPORT)
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| 201 | pSym->fFlags |= RTDBGSYM_FLAGS_EXPORTED;
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| 202 | if ((Buf.Sym.Flags & (SYMFLAG_VALUEPRESENT | SYMFLAG_CONSTANT)) == (SYMFLAG_VALUEPRESENT | SYMFLAG_CONSTANT))
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| 203 | {
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| 204 | pSym->iSegment = RTDBGSEG_ABS;
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| 205 | pSym->offSegment = (RTUINTPTR)Buf.Sym.Value;
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| 206 | pSym->RVA = (RTUINTPTR)Buf.Sym.Value;
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| 207 | }
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| 208 | else
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| 209 | {
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| 210 | pSym->RVA = (RTUINTPTR)(Buf.Sym.Address - pModPe->ImageBase);
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| 211 | rc = rtDbgModPeRVAToSegOff(pModPe, pSym->RVA, &pSym->iSegment, &pSym->offSegment);
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| 212 | }
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| 213 | pSym->cchName = (uint16_t)Buf.Sym.NameLen;
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| 214 | if (pSym->cchName >= sizeof(pSym->szName))
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| 215 | pSym->cchName = sizeof(pSym->szName) - 1;
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| 216 | memcpy(pSym->szName, Buf.Sym.Name, Buf.Sym.NameLen);
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| 217 | pSym->szName[Buf.Sym.NameLen] = '\0';
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| 218 | }
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| 219 | else
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| 220 | {
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| 221 | DWORD Err = GetLastError();
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| 222 | rc = RTErrConvertFromWin32(Err);
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| 223 | }
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| 224 | #endif
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| 225 | rc = VERR_NOT_IMPLEMENTED;
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| 226 | }
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| 227 | return rc;
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| 228 | }
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| 229 |
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| 230 |
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| 231 | /**
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| 232 | * @copydoc RTDBGMODOPS::pfnClose
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| 233 | */
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| 234 | static DECLCALLBACK(int) rtDbgModPEClose(PRTDBGMOD pMod)
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| 235 | {
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| 236 | PRTDBGMODPE pModPe = (PRTDBGMODPE)pMod;
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| 237 |
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| 238 | //if (g_pfnSymCleanup(pModPe->hSymInst))
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| 239 | // return VINF_SUCCESS;
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| 240 | //
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| 241 | //DWORD Err = GetLastError();
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| 242 | //int rc = RTErrConvertFromWin32(Err);
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| 243 | //AssertMsgFailed(("SymInitialize failed: Err=%d rc=%Rrc\n", Err, rc));
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| 244 | //return rc;
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| 245 | return VERR_NOT_IMPLEMENTED;
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| 246 | }
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| 247 |
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| 248 |
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| 249 | /**
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| 250 | * Methods for a PE module.
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| 251 | */
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| 252 | static const RTDBGMODOPS g_rtDbgModPEOps =
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| 253 | {
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| 254 | "PE (dbghelp)",
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| 255 | rtDbgModPEClose,
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| 256 | rtDbgModPEQuerySymbol,
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| 257 | rtDbgModPEQueryLine
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| 258 | };
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| 259 |
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| 260 |
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| 261 | /**
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| 262 | * Opens the debug info for a PE image using the windows dbghelp library.
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| 263 | *
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| 264 | * @returns IPRT status code.
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| 265 | *
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| 266 | * @param File The handle to the module.
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| 267 | * @param offHdr The offset of the PE header.
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| 268 | * @param pszModulePath The path to the module.
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| 269 | * @param ppDbgMod Where to store the module handle.
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| 270 | *
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| 271 | */
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| 272 | int rtDbgModPEOpen(RTFILE File, RTFOFF offHdr, const char *pszModulePath, PRTDBGMOD *ppDbgMod)
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| 273 | {
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| 274 | /*
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| 275 | * We need to read the section headers and get the image size.
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| 276 | */
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| 277 | IMAGE_FILE_HEADER FHdr;
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| 278 | int rc = RTFileReadAt(File, offHdr + OFFSETOF(IMAGE_NT_HEADERS32, FileHeader), &FHdr, sizeof(FHdr), NULL);
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| 279 | AssertRCReturn(rc, rc);
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| 280 |
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| 281 | uint32_t cbImage;
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| 282 | if (FHdr.SizeOfOptionalHeader == sizeof(IMAGE_OPTIONAL_HEADER32))
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| 283 | rc = RTFileReadAt(File, offHdr + OFFSETOF(IMAGE_NT_HEADERS32, OptionalHeader.SizeOfImage),
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| 284 | &cbImage, sizeof(cbImage), NULL);
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| 285 | else if (FHdr.SizeOfOptionalHeader == sizeof(IMAGE_OPTIONAL_HEADER64))
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| 286 | rc = RTFileReadAt(File, offHdr + OFFSETOF(IMAGE_NT_HEADERS64, OptionalHeader.SizeOfImage),
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| 287 | &cbImage, sizeof(cbImage), NULL);
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| 288 | else
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| 289 | AssertFailedReturn(VERR_BAD_EXE_FORMAT);
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| 290 | AssertRCReturn(rc, rc);
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| 291 |
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| 292 | /*
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| 293 | * Allocate the module and read/construct the section headers.
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| 294 | */
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| 295 | PRTDBGMODPE pModPe = (PRTDBGMODPE)RTMemAlloc(OFFSETOF(RTDBGMODPE, aSections[FHdr.NumberOfSections + 2]));
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| 296 | AssertReturn(pModPe, VERR_NO_MEMORY);
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| 297 | pModPe->Core.u32Magic = RTDBGMOD_MAGIC;
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| 298 | pModPe->Core.pOps = &g_rtDbgModPEOps;
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| 299 | pModPe->Core.File = File;
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| 300 | pModPe->cbImage = cbImage;
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| 301 | pModPe->cSections = 1 + FHdr.NumberOfSections;
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| 302 | rc = RTFileReadAt(File, offHdr + OFFSETOF(IMAGE_NT_HEADERS32, OptionalHeader) + FHdr.SizeOfOptionalHeader,
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| 303 | &pModPe->aSections[1], sizeof(pModPe->aSections[0]) * FHdr.NumberOfSections, NULL);
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| 304 | if (RT_SUCCESS(rc))
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| 305 | {
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| 306 | PIMAGE_SECTION_HEADER pSH = &pModPe->aSections[0];
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| 307 | memcpy(pSH->Name, "headers", sizeof(pSH->Name));
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| 308 | pSH->Misc.VirtualSize = pModPe->aSections[1].VirtualAddress;
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| 309 | pSH->VirtualAddress = 0;
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| 310 | pSH->SizeOfRawData = pSH->Misc.VirtualSize;
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| 311 | pSH->PointerToRawData = 0;
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| 312 | pSH->PointerToRelocations = 0;
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| 313 | pSH->PointerToLinenumbers = 0;
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| 314 | pSH->NumberOfRelocations = 0;
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| 315 | pSH->NumberOfLinenumbers = 0;
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| 316 | pSH->Characteristics = IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_ALIGN_4BYTES | IMAGE_SCN_MEM_READ;
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| 317 |
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| 318 | uint32_t uTheEnd = pModPe->aSections[FHdr.NumberOfSections].VirtualAddress
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| 319 | + pModPe->aSections[FHdr.NumberOfSections].Misc.VirtualSize;
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| 320 | if (uTheEnd < cbImage)
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| 321 | {
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| 322 | pSH = &pModPe->aSections[pModPe->cSections++];
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| 323 | memcpy(pSH->Name, "tail\0\0\0", sizeof(pSH->Name));
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| 324 | pSH->Misc.VirtualSize = cbImage - uTheEnd;
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| 325 | pSH->VirtualAddress = uTheEnd;
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| 326 | pSH->SizeOfRawData = pSH->Misc.VirtualSize;
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| 327 | pSH->PointerToRawData = 0;
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| 328 | pSH->PointerToRelocations = 0;
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| 329 | pSH->PointerToLinenumbers = 0;
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| 330 | pSH->NumberOfRelocations = 0;
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| 331 | pSH->NumberOfLinenumbers = 0;
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| 332 | pSH->Characteristics = IMAGE_SCN_CNT_UNINITIALIZED_DATA | IMAGE_SCN_ALIGN_1BYTES | IMAGE_SCN_MEM_READ;
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| 333 | }
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| 334 |
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| 335 | #if 0
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| 336 | /*
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| 337 | * Find a new dbghelp handle.
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| 338 | *
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| 339 | * We assume 4GB of handles outlast most debugging sessions, or in anyways that
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| 340 | * when we start reusing handles they are no longer in use. :-)
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| 341 | */
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| 342 | static volatile uint32_t s_u32LastHandle = 1;
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| 343 | HANDLE hSymInst = (HANDLE)ASMAtomicIncU32(&s_u32LastHandle);
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| 344 | while ( hSymInst == INVALID_HANDLE_VALUE
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| 345 | || hSymInst == (HANDLE)0
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| 346 | || hSymInst == GetCurrentProcess())
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| 347 | hSymInst = (HANDLE)ASMAtomicIncU32(&s_u32LastHandle);
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| 348 |
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| 349 | /*
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| 350 | * Initialize dbghelp and try open the specified module.
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| 351 | */
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| 352 | if (g_pfnSymInitialize(hSymInst, NULL, FALSE))
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| 353 | {
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| 354 | g_pfnSymSetOptions(SYMOPT_LOAD_LINES | SYMOPT_AUTO_PUBLICS | SYMOPT_ALLOW_ABSOLUTE_SYMBOLS);
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| 355 |
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| 356 | RTFileSeek(File, 0, RTFILE_SEEK_BEGIN, NULL); /* don't know if this is required or not... */
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| 357 | DWORD64 ImageBase = g_pfnSymLoadModule64(hSymInst, (HANDLE)File, pszModulePath, NULL, 0x00400000, 0);
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| 358 | if (ImageBase)
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| 359 | {
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| 360 | pModPe->hSymInst = hSymInst;
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| 361 | pModPe->ImageBase = ImageBase;
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| 362 | *ppDbgMod = &pModPe->Core;
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| 363 | return rc;
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| 364 | }
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| 365 |
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| 366 | DWORD Err = GetLastError();
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| 367 | rc = RTErrConvertFromWin32(Err);
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| 368 | AssertMsgFailed(("SymLoadModule64 failed: Err=%d rc=%Rrc\n", Err, rc));
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| 369 | g_pfnSymCleanup(hSymInst);
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| 370 | }
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| 371 | else
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| 372 | {
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| 373 | DWORD Err = GetLastError();
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| 374 | rc = RTErrConvertFromWin32(Err);
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|---|
| 375 | AssertMsgFailed(("SymInitialize failed: Err=%d rc=%Rrc\n", Err, rc));
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| 376 | }
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|---|
| 377 | #endif
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| 378 | rc = VERR_NOT_IMPLEMENTED;
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|---|
| 379 | }
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|---|
| 380 | else
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| 381 | AssertRC(rc);
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|---|
| 382 |
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|---|
| 383 | RTMemFree(pModPe);
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|---|
| 384 | return rc;
|
|---|
| 385 | }
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|---|
| 386 |
|
|---|
