Mercurial > hg > truffle
annotate src/share/tools/hsdis/hsdis-demo.c @ 4487:aae5b3773e63
Added CFG editor from c1visualizer.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 31 Jan 2012 00:23:10 +0100 |
parents | 1d1603768966 |
children | 5a98bf7d847b |
rev | line source |
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1 /* |
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2 * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 /* hsdis-demo.c -- dump a range of addresses as native instructions |
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26 This demonstrates the protocol required by the HotSpot PrintAssembly option. |
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27 */ |
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28 |
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29 #include "hsdis.h" |
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30 |
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31 #include "stdio.h" |
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32 #include "stdlib.h" |
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33 #include "string.h" |
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34 |
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35 void greet(const char*); |
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36 void disassemble(void*, void*); |
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37 void end_of_file(); |
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38 |
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39 const char* options = NULL; |
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40 int raw = 0; |
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41 int xml = 0; |
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42 |
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43 int main(int ac, char** av) { |
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44 int greeted = 0; |
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45 int i; |
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46 for (i = 1; i < ac; i++) { |
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47 const char* arg = av[i]; |
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48 if (arg[0] == '-') { |
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49 if (!strcmp(arg, "-xml")) |
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50 xml ^= 1; |
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51 else if (!strcmp(arg, "-raw")) |
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52 raw ^= 1; |
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53 else if (!strncmp(arg, "-options=", 9)) |
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54 options = arg+9; |
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55 else |
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56 { printf("Usage: %s [-xml] [name...]\n", av[0]); exit(2); } |
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57 continue; |
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58 } |
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59 greet(arg); |
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60 greeted = 1; |
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61 } |
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62 if (!greeted) |
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63 greet("world"); |
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64 printf("...And now for something completely different:\n"); |
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65 disassemble((void*) &main, (void*) &end_of_file); |
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66 printf("Cheers!\n"); |
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67 } |
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68 |
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69 void greet(const char* whom) { |
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70 printf("Hello, %s!\n", whom); |
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71 } |
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72 |
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73 void end_of_file() { } |
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74 |
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75 /* don't disassemble after this point... */ |
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76 |
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77 #include "dlfcn.h" |
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78 |
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79 #define DECODE_INSTRUCTIONS_NAME "decode_instructions" |
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80 #define HSDIS_NAME "hsdis" |
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81 static void* decode_instructions_pv = 0; |
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82 static const char* hsdis_path[] = { |
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83 HSDIS_NAME"-"LIBARCH LIB_EXT, |
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84 "./" HSDIS_NAME"-"LIBARCH LIB_EXT, |
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85 #ifdef TARGET_DIR |
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86 TARGET_DIR"/"HSDIS_NAME"-"LIBARCH LIB_EXT, |
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87 #endif |
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88 NULL |
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89 }; |
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90 |
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91 static const char* load_decode_instructions() { |
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92 void* dllib = NULL; |
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93 const char* *next_in_path = hsdis_path; |
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94 while (1) { |
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95 decode_instructions_pv = dlsym(dllib, DECODE_INSTRUCTIONS_NAME); |
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96 if (decode_instructions_pv != NULL) |
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97 return NULL; |
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98 if (dllib != NULL) |
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99 return "plugin does not defined "DECODE_INSTRUCTIONS_NAME; |
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100 for (dllib = NULL; dllib == NULL; ) { |
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101 const char* next_lib = (*next_in_path++); |
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102 if (next_lib == NULL) |
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103 return "cannot find plugin "HSDIS_NAME LIB_EXT; |
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104 dllib = dlopen(next_lib, RTLD_LAZY); |
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105 } |
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106 } |
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107 } |
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108 |
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109 |
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110 static const char* lookup(void* addr) { |
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111 #define CHECK_NAME(fn) \ |
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112 if (addr == (void*) &fn) return #fn; |
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113 |
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114 CHECK_NAME(main); |
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115 CHECK_NAME(greet); |
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116 return NULL; |
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117 } |
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118 |
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119 /* does the event match the tag, followed by a null, space, or slash? */ |
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120 #define MATCH(event, tag) \ |
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121 (!strncmp(event, tag, sizeof(tag)-1) && \ |
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122 (!event[sizeof(tag)-1] || strchr(" /", event[sizeof(tag)-1]))) |
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123 |
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124 |
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125 static const char event_cookie[] = "event_cookie"; /* demo placeholder */ |
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126 static void* handle_event(void* cookie, const char* event, void* arg) { |
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127 #define NS_DEMO "demo:" |
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128 if (cookie != event_cookie) |
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129 printf("*** bad event cookie %p != %p\n", cookie, event_cookie); |
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130 |
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131 if (xml) { |
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132 /* We could almost do a printf(event, arg), |
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133 but for the sake of a better demo, |
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134 we dress the result up as valid XML. |
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135 */ |
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136 const char* fmt = strchr(event, ' '); |
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137 int evlen = (fmt ? fmt - event : strlen(event)); |
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138 if (!fmt) { |
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139 if (event[0] != '/') { |
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140 printf("<"NS_DEMO"%.*s>", evlen, event); |
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141 } else { |
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142 printf("</"NS_DEMO"%.*s>", evlen-1, event+1); |
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143 } |
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144 } else { |
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145 if (event[0] != '/') { |
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146 printf("<"NS_DEMO"%.*s", evlen, event); |
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147 printf(fmt, arg); |
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148 printf(">"); |
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149 } else { |
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150 printf("<"NS_DEMO"%.*s_done", evlen-1, event+1); |
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151 printf(fmt, arg); |
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152 printf("/></"NS_DEMO"%.*s>", evlen-1, event+1); |
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153 } |
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154 } |
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155 } |
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156 |
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157 if (MATCH(event, "insn")) { |
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158 const char* name = lookup(arg); |
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159 if (name) printf("%s:\n", name); |
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160 |
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161 /* basic action for <insn>: */ |
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162 printf(" %p\t", arg); |
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163 |
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164 } else if (MATCH(event, "/insn")) { |
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165 /* basic action for </insn>: |
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166 (none, plugin puts the newline for us |
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167 */ |
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168 |
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169 } else if (MATCH(event, "mach")) { |
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170 printf("Decoding for CPU '%s'\n", (char*) arg); |
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171 |
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172 } else if (MATCH(event, "addr")) { |
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173 /* basic action for <addr/>: */ |
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174 const char* name = lookup(arg); |
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175 if (name) { |
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176 printf("&%s (%p)", name, arg); |
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177 /* return non-null to notify hsdis not to print the addr */ |
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178 return arg; |
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179 } |
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180 } |
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181 |
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182 /* null return is always safe; can mean "I ignored it" */ |
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183 return NULL; |
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184 } |
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185 |
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186 #define fprintf_callback \ |
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187 (decode_instructions_printf_callback_ftype)&fprintf |
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188 |
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189 void disassemble(void* from, void* to) { |
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190 const char* err = load_decode_instructions(); |
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191 if (err != NULL) { |
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192 printf("%s: %s\n", err, dlerror()); |
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193 exit(1); |
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194 } |
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195 printf("Decoding from %p to %p...\n", from, to); |
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196 decode_instructions_ftype decode_instructions |
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197 = (decode_instructions_ftype) decode_instructions_pv; |
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198 void* res; |
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199 if (raw && xml) { |
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200 res = (*decode_instructions)(from, to, NULL, stdout, NULL, stdout, options); |
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201 } else if (raw) { |
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202 res = (*decode_instructions)(from, to, NULL, NULL, NULL, stdout, options); |
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203 } else { |
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204 res = (*decode_instructions)(from, to, |
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205 handle_event, (void*) event_cookie, |
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206 fprintf_callback, stdout, |
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207 options); |
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208 } |
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209 if (res != to) |
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210 printf("*** Result was %p!\n", res); |
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211 } |