1 | /* $Id: dbgkrnlinfo-r0drv-solaris.c 52553 2014-09-01 14:48:33Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Kernel debug information, Ring-0 Driver, Solaris Code.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2012 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 "the-solaris-kernel.h"
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32 | #include "internal/iprt.h"
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33 |
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34 | #include <iprt/dbg.h>
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35 | #include <iprt/asm.h>
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36 | #include <iprt/assert.h>
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37 | #include <iprt/err.h>
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38 | #include <iprt/log.h>
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39 | #include <iprt/mem.h>
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40 | #include <iprt/string.h>
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41 | #include <iprt/thread.h>
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42 |
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43 | #include "internal/magics.h"
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44 |
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45 |
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46 | /*******************************************************************************
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47 | * Structures and Typedefs *
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48 | *******************************************************************************/
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49 | /**
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50 | * Solaris kernel debug info instance data.
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51 | */
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52 | typedef struct RTDBGKRNLINFOINT
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53 | {
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54 | /** Magic value (RTDBGKRNLINFO_MAGIC). */
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55 | uint32_t volatile u32Magic;
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56 | /** The number of threads referencing this object. */
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57 | uint32_t volatile cRefs;
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58 | /** Pointer to the genunix CTF handle. */
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59 | ctf_file_t *pGenUnixCTF;
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60 | /** Pointer to the genunix module handle. */
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61 | modctl_t *pGenUnixMod;
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62 | } RTDBGKRNLINFOINT;
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63 | /** Pointer to the solaris kernel debug info instance data. */
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64 | typedef struct RTDBGKRNLINFOINT *PRTDBGKRNLINFOINT;
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65 |
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66 |
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67 | /**
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68 | * Retains a kernel module and opens the CTF data associated with it.
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69 | *
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70 | * @param pszModule The name of the module to open.
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71 | * @param ppMod Where to store the module handle.
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72 | * @param ppCTF Where to store the module's CTF handle.
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73 | *
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74 | * @return IPRT status code.
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75 | */
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76 | static int rtR0DbgKrnlInfoModRetain(char *pszModule, modctl_t **ppMod, ctf_file_t **ppCTF)
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77 | {
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78 | AssertPtrReturn(pszModule, VERR_INVALID_PARAMETER);
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79 | AssertPtrReturn(ppMod, VERR_INVALID_PARAMETER);
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80 | AssertPtrReturn(ppCTF, VERR_INVALID_PARAMETER);
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81 |
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82 | int rc = VINF_SUCCESS;
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83 | modid_t ModId = mod_name_to_modid(pszModule);
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84 | if (ModId != -1)
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85 | {
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86 | *ppMod = mod_hold_by_id(ModId);
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87 | if (*ppMod)
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88 | {
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89 | /*
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90 | * Hold mod_lock as ctf_modopen may update the module with uncompressed CTF data.
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91 | */
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92 | int err;
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93 | mutex_enter(&mod_lock);
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94 | *ppCTF = ctf_modopen(((modctl_t *)*ppMod)->mod_mp, &err);
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95 | mutex_exit(&mod_lock);
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96 | mod_release_mod(*ppMod);
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97 |
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98 | if (*ppCTF)
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99 | return VINF_SUCCESS;
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100 | else
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101 | {
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102 | LogRel(("rtR0DbgKrnlInfoModRetain: ctf_modopen failed for '%s' err=%d\n", pszModule, err));
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103 | rc = VERR_INTERNAL_ERROR_3;
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104 | }
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105 | }
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106 | else
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107 | {
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108 | LogRel(("rtR0DbgKrnlInfoModRetain: mod_hold_by_id failed for '%s'\n", pszModule));
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109 | rc = VERR_INTERNAL_ERROR_2;
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110 | }
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111 | }
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112 | else
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113 | {
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114 | LogRel(("rtR0DbgKrnlInfoModRetain: mod_name_to_modid failed for '%s'\n", pszModule));
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115 | rc = VERR_INTERNAL_ERROR;
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116 | }
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117 |
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118 | return rc;
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119 | }
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120 |
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121 |
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122 | /**
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123 | * Releases the kernel module and closes its CTF data.
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124 | *
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125 | * @param pMod Pointer to the module handle.
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126 | * @param pCTF Pointer to the module's CTF handle.
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127 | */
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128 | static void rtR0DbgKrnlInfoModRelease(modctl_t *pMod, ctf_file_t *pCTF)
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129 | {
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130 | AssertPtrReturnVoid(pMod);
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131 | AssertPtrReturnVoid(pCTF);
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132 |
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133 | ctf_close(pCTF);
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134 | }
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135 |
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136 |
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137 | RTR0DECL(int) RTR0DbgKrnlInfoOpen(PRTDBGKRNLINFO phKrnlInfo, uint32_t fFlags)
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138 | {
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139 | AssertReturn(fFlags == 0, VERR_INVALID_PARAMETER);
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140 | AssertPtrReturn(phKrnlInfo, VERR_INVALID_POINTER);
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141 | /* This can be called as part of IPRT init, in which case we have no thread preempt information yet. */
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142 | if (g_frtSolInitDone)
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143 | RT_ASSERT_PREEMPTIBLE();
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144 |
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145 | *phKrnlInfo = NIL_RTDBGKRNLINFO;
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146 | PRTDBGKRNLINFOINT pThis = (PRTDBGKRNLINFOINT)RTMemAllocZ(sizeof(*pThis));
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147 | if (!pThis)
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148 | return VERR_NO_MEMORY;
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149 |
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150 | char szGenUnixModName[] = "genunix";
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151 | int rc = rtR0DbgKrnlInfoModRetain(szGenUnixModName, &pThis->pGenUnixMod, &pThis->pGenUnixCTF);
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152 | if (RT_SUCCESS(rc))
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153 | {
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154 | pThis->u32Magic = RTDBGKRNLINFO_MAGIC;
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155 | pThis->cRefs = 1;
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156 |
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157 | *phKrnlInfo = pThis;
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158 | return VINF_SUCCESS;
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159 | }
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160 |
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161 | LogRel(("RTR0DbgKrnlInfoOpen: rtR0DbgKrnlInfoModRetain failed rc=%d.\n", rc));
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162 | RTMemFree(pThis);
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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 | RTR0DECL(uint32_t) RTR0DbgKrnlInfoRetain(RTDBGKRNLINFO hKrnlInfo)
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168 | {
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169 | PRTDBGKRNLINFOINT pThis = hKrnlInfo;
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170 | AssertPtrReturn(pThis, UINT32_MAX);
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171 | AssertMsgReturn(pThis->u32Magic == RTDBGKRNLINFO_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), UINT32_MAX);
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172 |
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173 | uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
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174 | Assert(cRefs && cRefs < 100000);
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175 | return cRefs;
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176 | }
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177 |
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178 |
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179 | RTR0DECL(uint32_t) RTR0DbgKrnlInfoRelease(RTDBGKRNLINFO hKrnlInfo)
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180 | {
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181 | PRTDBGKRNLINFOINT pThis = hKrnlInfo;
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182 | if (pThis == NIL_RTDBGKRNLINFO)
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183 | return 0;
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184 | AssertPtrReturn(pThis, UINT32_MAX);
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185 | AssertMsgReturn(pThis->u32Magic == RTDBGKRNLINFO_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), UINT32_MAX);
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186 | if (g_frtSolInitDone)
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187 | RT_ASSERT_PREEMPTIBLE();
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188 |
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189 | uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
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190 | if (cRefs == 0)
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191 | {
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192 | pThis->u32Magic = ~RTDBGKRNLINFO_MAGIC;
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193 | rtR0DbgKrnlInfoModRelease(pThis->pGenUnixMod, pThis->pGenUnixCTF);
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194 | RTMemFree(pThis);
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195 | }
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196 | return cRefs;
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197 | }
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198 |
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199 |
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200 | RTR0DECL(int) RTR0DbgKrnlInfoQueryMember(RTDBGKRNLINFO hKrnlInfo, const char *pszStructure,
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201 | const char *pszMember, size_t *poffMember)
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202 | {
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203 | PRTDBGKRNLINFOINT pThis = hKrnlInfo;
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204 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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205 | AssertMsgReturn(pThis->u32Magic == RTDBGKRNLINFO_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
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206 | AssertPtrReturn(pszMember, VERR_INVALID_PARAMETER);
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207 | AssertPtrReturn(pszStructure, VERR_INVALID_PARAMETER);
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208 | AssertPtrReturn(poffMember, VERR_INVALID_PARAMETER);
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209 | if (g_frtSolInitDone)
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210 | RT_ASSERT_PREEMPTIBLE();
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211 |
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212 | int rc = VERR_NOT_FOUND;
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213 | ctf_id_t TypeIdent = ctf_lookup_by_name(pThis->pGenUnixCTF, pszStructure);
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214 | if (TypeIdent != CTF_ERR)
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215 | {
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216 | ctf_membinfo_t MemberInfo;
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217 | RT_ZERO(MemberInfo);
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218 | if (ctf_member_info(pThis->pGenUnixCTF, TypeIdent, pszMember, &MemberInfo) != CTF_ERR)
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219 | {
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220 | *poffMember = (MemberInfo.ctm_offset >> 3);
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221 | return VINF_SUCCESS;
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222 | }
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223 | }
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224 |
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225 | return rc;
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226 | }
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227 |
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228 |
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229 | RTR0DECL(int) RTR0DbgKrnlInfoQuerySymbol(RTDBGKRNLINFO hKrnlInfo, const char *pszModule,
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230 | const char *pszSymbol, void **ppvSymbol)
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231 | {
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232 | PRTDBGKRNLINFOINT pThis = hKrnlInfo;
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233 | AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
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234 | AssertMsgReturn(pThis->u32Magic == RTDBGKRNLINFO_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
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235 | AssertPtrReturn(pszSymbol, VERR_INVALID_PARAMETER);
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236 | AssertPtrNullReturn(ppvSymbol, VERR_INVALID_PARAMETER);
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237 | AssertReturn(!pszModule, VERR_MODULE_NOT_FOUND);
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238 | if (g_frtSolInitDone)
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239 | RT_ASSERT_PREEMPTIBLE();
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240 |
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241 | uintptr_t uValue = kobj_getsymvalue((char *)pszSymbol, 1 /* only kernel */);
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242 | if (ppvSymbol)
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243 | *ppvSymbol = (void *)uValue;
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244 | if (uValue)
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245 | return VINF_SUCCESS;
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246 | return VERR_SYMBOL_NOT_FOUND;
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247 | }
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248 |
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