1 | /* $Id: dbgmodldr.cpp 83084 2020-02-15 15:16:11Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Debug Module Image Interpretation by RTLdr.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2011-2020 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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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/dbg.h>
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32 | #include "internal/iprt.h"
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33 |
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34 | #include <iprt/assert.h>
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35 | #include <iprt/errcore.h>
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36 | #include <iprt/file.h>
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37 | #include <iprt/ldr.h>
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38 | #include <iprt/mem.h>
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39 | #include <iprt/param.h>
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40 | #include <iprt/path.h>
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41 | #include <iprt/string.h>
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42 | #include "internal/dbgmod.h"
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43 | #include "internal/ldr.h"
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44 | #include "internal/magics.h"
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45 |
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46 |
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47 | /*********************************************************************************************************************************
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48 | * Structures and Typedefs *
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49 | *********************************************************************************************************************************/
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50 | /**
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51 | * The instance data of the RTLdr based image reader.
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52 | */
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53 | typedef struct RTDBGMODLDR
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54 | {
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55 | /** Magic value (RTDBGMODLDR_MAGIC). */
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56 | uint32_t u32Magic;
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57 | /** The loader handle. */
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58 | RTLDRMOD hLdrMod;
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59 | } RTDBGMODLDR;
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60 | /** Pointer to instance data NM map reader. */
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61 | typedef RTDBGMODLDR *PRTDBGMODLDR;
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62 |
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63 |
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64 |
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65 | /** @interface_method_impl{RTDBGMODVTDBG,pfnUnwindFrame} */
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66 | static DECLCALLBACK(int) rtDbgModLdr_UnwindFrame(PRTDBGMODINT pMod, RTDBGSEGIDX iSeg, RTUINTPTR off, PRTDBGUNWINDSTATE pState)
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67 | {
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68 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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69 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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70 | return RTLdrUnwindFrame(pThis->hLdrMod, NULL, iSeg, off, pState);
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71 | }
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72 |
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73 |
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74 | /** @interface_method_impl{RTDBGMODVTIMG,pfnQueryProp} */
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75 | static DECLCALLBACK(int) rtDbgModLdr_QueryProp(PRTDBGMODINT pMod, RTLDRPROP enmProp, void *pvBuf, size_t cbBuf, size_t *pcbRet)
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76 | {
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77 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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78 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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79 | return RTLdrQueryPropEx(pThis->hLdrMod, enmProp, NULL /*pvBits*/, pvBuf, cbBuf, pcbRet);
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80 | }
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81 |
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82 |
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83 | /** @interface_method_impl{RTDBGMODVTIMG,pfnGetArch} */
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84 | static DECLCALLBACK(RTLDRARCH) rtDbgModLdr_GetArch(PRTDBGMODINT pMod)
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85 | {
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86 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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87 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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88 | return RTLdrGetArch(pThis->hLdrMod);
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89 | }
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90 |
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91 |
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92 | /** @interface_method_impl{RTDBGMODVTIMG,pfnGetFormat} */
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93 | static DECLCALLBACK(RTLDRFMT) rtDbgModLdr_GetFormat(PRTDBGMODINT pMod)
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94 | {
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95 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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96 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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97 | return RTLdrGetFormat(pThis->hLdrMod);
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98 | }
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99 |
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100 |
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101 | /** @interface_method_impl{RTDBGMODVTIMG,pfnReadAt} */
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102 | static DECLCALLBACK(int) rtDbgModLdr_ReadAt(PRTDBGMODINT pMod, uint32_t iDbgInfoHint, RTFOFF off, void *pvBuf, size_t cb)
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103 | {
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104 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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105 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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106 | RT_NOREF_PV(iDbgInfoHint);
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107 | return rtLdrReadAt(pThis->hLdrMod, pvBuf, UINT32_MAX /** @todo iDbgInfo*/, off, cb);
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108 | }
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109 |
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110 |
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111 | /** @interface_method_impl{RTDBGMODVTIMG,pfnUnmapPart} */
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112 | static DECLCALLBACK(int) rtDbgModLdr_UnmapPart(PRTDBGMODINT pMod, size_t cb, void const **ppvMap)
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113 | {
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114 | Assert(((PRTDBGMODLDR)pMod->pvImgPriv)->u32Magic == RTDBGMODLDR_MAGIC);
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115 | NOREF(pMod); NOREF(cb);
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116 | RTMemFree((void *)*ppvMap);
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117 | *ppvMap = NULL;
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118 | return VINF_SUCCESS;
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119 | }
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120 |
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121 |
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122 | /** @interface_method_impl{RTDBGMODVTIMG,pfnMapPart} */
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123 | static DECLCALLBACK(int) rtDbgModLdr_MapPart(PRTDBGMODINT pMod, uint32_t iDbgInfo, RTFOFF off, size_t cb, void const **ppvMap)
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124 | {
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125 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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126 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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127 |
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128 | void *pvMap = RTMemAlloc(cb);
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129 | if (!pvMap)
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130 | return VERR_NO_MEMORY;
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131 |
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132 | int rc = rtLdrReadAt(pThis->hLdrMod, pvMap, iDbgInfo, off, cb);
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133 | if (RT_SUCCESS(rc))
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134 | *ppvMap = pvMap;
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135 | else
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136 | {
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137 | RTMemFree(pvMap);
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138 | *ppvMap = NULL;
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139 | }
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140 | return rc;
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141 | }
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142 |
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143 |
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144 | /** @interface_method_impl{RTDBGMODVTIMG,pfnImageSize} */
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145 | static DECLCALLBACK(RTUINTPTR) rtDbgModLdr_ImageSize(PRTDBGMODINT pMod)
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146 | {
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147 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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148 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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149 | return RTLdrSize(pThis->hLdrMod);
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150 | }
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151 |
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152 |
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153 | /** @interface_method_impl{RTDBGMODVTIMG,pfnRvaToSegOffset} */
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154 | static DECLCALLBACK(int) rtDbgModLdr_RvaToSegOffset(PRTDBGMODINT pMod, RTLDRADDR Rva, PRTDBGSEGIDX piSeg, PRTLDRADDR poffSeg)
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155 | {
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156 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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157 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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158 | return RTLdrRvaToSegOffset(pThis->hLdrMod, Rva, piSeg, poffSeg);
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159 | }
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160 |
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161 |
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162 | /** @interface_method_impl{RTDBGMODVTIMG,pfnLinkAddressToSegOffset} */
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163 | static DECLCALLBACK(int) rtDbgModLdr_LinkAddressToSegOffset(PRTDBGMODINT pMod, RTLDRADDR LinkAddress,
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164 | PRTDBGSEGIDX piSeg, PRTLDRADDR poffSeg)
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165 | {
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166 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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167 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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168 | return RTLdrLinkAddressToSegOffset(pThis->hLdrMod, LinkAddress, piSeg, poffSeg);
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169 | }
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170 |
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171 |
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172 | /** @interface_method_impl{RTDBGMODVTIMG,pfnEnumSymbols} */
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173 | static DECLCALLBACK(int) rtDbgModLdr_EnumSymbols(PRTDBGMODINT pMod, uint32_t fFlags, RTLDRADDR BaseAddress,
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174 | PFNRTLDRENUMSYMS pfnCallback, void *pvUser)
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175 | {
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176 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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177 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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178 | return RTLdrEnumSymbols(pThis->hLdrMod, fFlags, NULL /*pvBits*/, BaseAddress, pfnCallback, pvUser);
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179 | }
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180 |
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181 |
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182 | /** @interface_method_impl{RTDBGMODVTIMG,pfnEnumSegments} */
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183 | static DECLCALLBACK(int) rtDbgModLdr_EnumSegments(PRTDBGMODINT pMod, PFNRTLDRENUMSEGS pfnCallback, void *pvUser)
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184 | {
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185 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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186 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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187 | return RTLdrEnumSegments(pThis->hLdrMod, pfnCallback, pvUser);
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188 | }
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189 |
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190 |
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191 | /** @interface_method_impl{RTDBGMODVTIMG,pfnEnumDbgInfo} */
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192 | static DECLCALLBACK(int) rtDbgModLdr_EnumDbgInfo(PRTDBGMODINT pMod, PFNRTLDRENUMDBG pfnCallback, void *pvUser)
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193 | {
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194 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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195 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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196 | return RTLdrEnumDbgInfo(pThis->hLdrMod, NULL, pfnCallback, pvUser);
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197 | }
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198 |
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199 |
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200 | /** @interface_method_impl{RTDBGMODVTIMG,pfnClose} */
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201 | static DECLCALLBACK(int) rtDbgModLdr_Close(PRTDBGMODINT pMod)
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202 | {
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203 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)pMod->pvImgPriv;
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204 | AssertPtr(pThis);
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205 | Assert(pThis->u32Magic == RTDBGMODLDR_MAGIC);
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206 |
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207 | int rc = RTLdrClose(pThis->hLdrMod); AssertRC(rc);
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208 | pThis->hLdrMod = NIL_RTLDRMOD;
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209 | pThis->u32Magic = RTDBGMODLDR_MAGIC_DEAD;
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210 |
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211 | RTMemFree(pThis);
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212 |
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213 | return VINF_SUCCESS;
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214 | }
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215 |
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216 |
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217 | /** @interface_method_impl{RTDBGMODVTIMG,pfnTryOpen} */
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218 | static DECLCALLBACK(int) rtDbgModLdr_TryOpen(PRTDBGMODINT pMod, RTLDRARCH enmArch, uint32_t fLdrFlags)
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219 | {
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220 | RTLDRMOD hLdrMod;
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221 | int rc = RTLdrOpen(pMod->pszImgFile, RTLDR_O_FOR_DEBUG | fLdrFlags, enmArch, &hLdrMod);
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222 | if (RT_SUCCESS(rc))
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223 | {
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224 | rc = rtDbgModLdrOpenFromHandle(pMod, hLdrMod);
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225 | if (RT_FAILURE(rc))
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226 | RTLdrClose(hLdrMod);
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227 | }
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228 | return rc;
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229 | }
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230 |
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231 |
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232 | /** Virtual function table for the RTLdr based image reader. */
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233 | DECL_HIDDEN_CONST(RTDBGMODVTIMG) const g_rtDbgModVtImgLdr =
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234 | {
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235 | /*.u32Magic = */ RTDBGMODVTIMG_MAGIC,
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236 | /*.fReserved = */ 0,
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237 | /*.pszName = */ "RTLdr",
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238 | /*.pfnTryOpen = */ rtDbgModLdr_TryOpen,
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239 | /*.pfnClose = */ rtDbgModLdr_Close,
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240 | /*.pfnEnumDbgInfo = */ rtDbgModLdr_EnumDbgInfo,
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241 | /*.pfnEnumSegments = */ rtDbgModLdr_EnumSegments,
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242 | /*.pfnEnumSymbols = */ rtDbgModLdr_EnumSymbols,
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243 | /*.pfnImageSize = */ rtDbgModLdr_ImageSize,
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244 | /*.pfnLinkAddressToSegOffset = */ rtDbgModLdr_LinkAddressToSegOffset,
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245 | /*.pfnRvaToSegOffset= */ rtDbgModLdr_RvaToSegOffset,
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246 | /*.pfnMapPart = */ rtDbgModLdr_MapPart,
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247 | /*.pfnUnmapPart = */ rtDbgModLdr_UnmapPart,
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248 | /*.pfnReadAt = */ rtDbgModLdr_ReadAt,
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249 | /*.pfnGetFormat = */ rtDbgModLdr_GetFormat,
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250 | /*.pfnGetArch = */ rtDbgModLdr_GetArch,
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251 | /*.pfnQueryProp = */ rtDbgModLdr_QueryProp,
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252 | /*.pfnUnwindFrame = */ rtDbgModLdr_UnwindFrame,
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253 |
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254 | /*.u32EndMagic = */ RTDBGMODVTIMG_MAGIC
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255 | };
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256 |
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257 |
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258 | /**
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259 | * Open PE-image trick.
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260 | *
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261 | * @returns IPRT status code
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262 | * @param pDbgMod The debug module instance.
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263 | * @param hLdrMod The module to open a image debug backend for.
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264 | */
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265 | DECLHIDDEN(int) rtDbgModLdrOpenFromHandle(PRTDBGMODINT pDbgMod, RTLDRMOD hLdrMod)
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266 | {
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267 | PRTDBGMODLDR pThis = (PRTDBGMODLDR)RTMemAllocZ(sizeof(RTDBGMODLDR));
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268 | if (!pThis)
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269 | return VERR_NO_MEMORY;
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270 |
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271 | pThis->u32Magic = RTDBGMODLDR_MAGIC;
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272 | pThis->hLdrMod = hLdrMod;
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273 | pDbgMod->pvImgPriv = pThis;
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274 | return VINF_SUCCESS;
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275 | }
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276 |
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