1 | /* |
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2 | * Copyright (c) 1992-1998 Michael A. Cooper. |
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3 | * This software may be freely used and distributed provided it is not |
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4 | * sold for profit or used in part or in whole for commercial gain |
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5 | * without prior written agreement, and the author is credited |
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6 | * appropriately. |
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7 | */ |
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8 | |
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9 | #ifndef lint |
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10 | static char *RCSid = "$Revision: 1.1.1.3 $"; |
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11 | #endif |
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12 | |
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13 | #include "defs.h" |
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14 | |
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15 | #if defined(NEED_KVM) |
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16 | |
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17 | #include <stdio.h> |
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18 | #include <sys/errno.h> |
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19 | #include "kvm.h" |
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20 | |
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21 | #ifndef SYSFAIL |
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22 | #define SYSFAIL -1 |
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23 | #endif |
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24 | |
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25 | #if defined(DEBUG) && !defined(SYSERR) |
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26 | extern int errno; |
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27 | extern char sys_errlist[]; |
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28 | #define SYSERR sys_errlist[errno] |
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29 | #endif |
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30 | |
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31 | char *strdup(); |
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32 | |
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33 | #if !defined(NAMELIST) |
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34 | #define NAMELIST "/vmunix" |
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35 | #endif /* NAMELIST */ |
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36 | #if !defined(KMEMFILE) |
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37 | #define KMEMFILE "/dev/kmem" |
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38 | #endif /* KMEMFILE */ |
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39 | |
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40 | /* |
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41 | * Close things down. |
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42 | */ |
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43 | extern int kvm_close(kd) |
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44 | kvm_t *kd; |
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45 | { |
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46 | if (!kd) |
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47 | return(-1); |
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48 | |
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49 | if (kd->kmemd) |
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50 | close(kd->kmemd); |
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51 | if (kd->namelist) |
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52 | free(kd->namelist); |
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53 | if (kd->vmfile) |
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54 | free(kd->vmfile); |
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55 | |
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56 | free(kd); |
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57 | |
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58 | return(0); |
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59 | } |
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60 | |
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61 | /* |
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62 | * Open things up. |
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63 | */ |
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64 | extern kvm_t *kvm_open(NameList, CoreFile, SwapFile, Flag, ErrStr) |
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65 | char *NameList; |
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66 | char *CoreFile; |
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67 | char *SwapFile; |
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68 | int Flag; |
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69 | char *ErrStr; |
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70 | { |
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71 | kvm_t *kd; |
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72 | |
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73 | if ((kd = (kvm_t *) malloc(sizeof(kvm_t))) == NULL) { |
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74 | #ifdef DEBUG |
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75 | fprintf(stderr, "kvm_open() malloc %d bytes failed!\n", sizeof(kvm_t)); |
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76 | #endif |
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77 | return((kvm_t *) NULL); |
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78 | } |
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79 | |
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80 | if (NameList) |
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81 | kd->namelist = strdup(NameList); |
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82 | else |
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83 | kd->namelist = strdup(NAMELIST); |
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84 | |
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85 | if (CoreFile) |
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86 | kd->vmfile = strdup(CoreFile); |
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87 | else |
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88 | kd->vmfile = strdup(KMEMFILE); |
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89 | |
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90 | if ((kd->kmemd = open(kd->vmfile, Flag, 0)) == SYSFAIL) { |
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91 | #ifdef DEBUG |
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92 | fprintf(stderr, "kvm_open() open '%s' failed: %s.\n", kd->vmfile, |
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93 | SYSERR); |
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94 | #endif |
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95 | return((kvm_t *) NULL); |
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96 | } |
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97 | |
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98 | return(kd); |
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99 | } |
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100 | |
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101 | /* |
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102 | * KVM read function |
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103 | */ |
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104 | extern int kvm_read(kd, Addr, Buf, NBytes) |
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105 | kvm_t *kd; |
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106 | KVMaddr_t Addr; |
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107 | void *Buf; |
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108 | size_t NBytes; |
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109 | { |
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110 | size_t RetVal; |
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111 | |
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112 | if (!kd) { |
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113 | #ifdef DEBUG |
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114 | fprintf(stderr, "kvm_read(): invalid kd param\n"); |
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115 | #endif |
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116 | return(SYSFAIL); |
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117 | } |
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118 | |
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119 | if (lseek(kd->kmemd, Addr, 0) == SYSFAIL) { |
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120 | #ifdef DEBUG |
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121 | fprintf(stderr, "kvm_read(): lseek failed (desc %d addr 0x%x): %s\n", |
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122 | kd->kmemd, Addr, SYSERR); |
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123 | #endif |
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124 | return(SYSFAIL); |
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125 | } |
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126 | |
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127 | if ((RetVal = read(kd->kmemd, Buf, NBytes)) != NBytes) { |
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128 | #ifdef DEBUG |
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129 | fprintf(stderr, |
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130 | "kvm_read(): read failed (desc %d buf 0x%x size %d): %s\n", |
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131 | kd->kmemd, Buf, NBytes, SYSERR); |
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132 | #endif |
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133 | return(SYSFAIL); |
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134 | } |
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135 | |
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136 | return(RetVal); |
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137 | } |
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138 | |
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139 | /* |
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140 | * KVM write function |
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141 | */ |
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142 | extern int kvm_write(kd, Addr, Buf, NBytes) |
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143 | kvm_t *kd; |
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144 | unsigned long Addr; |
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145 | char *Buf; |
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146 | unsigned NBytes; |
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147 | { |
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148 | unsigned ret; |
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149 | |
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150 | if (!kd) { |
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151 | return(SYSFAIL); |
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152 | } |
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153 | |
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154 | if (lseek(kd->kmemd, Addr, 0) == SYSFAIL) { |
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155 | return(SYSFAIL); |
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156 | } |
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157 | |
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158 | if ((ret = write(kd->kmemd, Buf, NBytes)) != NBytes) { |
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159 | return(SYSFAIL); |
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160 | } |
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161 | |
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162 | return(ret); |
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163 | } |
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164 | |
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165 | /* |
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166 | * Perform an nlist() |
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167 | */ |
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168 | #if defined(HAVE_NLIST) |
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169 | extern int kvm_nlist(kd, nl) |
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170 | kvm_t *kd; |
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171 | nlist_t *nl; |
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172 | { |
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173 | int status; |
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174 | |
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175 | if (!kd) |
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176 | return(SYSFAIL); |
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177 | |
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178 | return(NLIST_FUNC(kd->namelist, nl)); |
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179 | } |
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180 | #endif /* HAVE_NLIST */ |
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181 | |
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182 | #endif /* NEED_KVM */ |
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