Mercurial > hg > truffle
annotate src/share/tools/hsdis/hsdis.c @ 100:c7c777385a15
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Summary: remove old private plugin interface, simplify, rework old plugin to use unchanged Gnu sources
Reviewed-by: kvn, rasbold
author | jrose |
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date | Wed, 02 Apr 2008 12:09:59 -0700 |
parents | |
children | 67a2f5ba5582 |
rev | line source |
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1 /* |
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2 * Copyright 2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 /* hsdis.c -- dump a range of addresses as native instructions |
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26 This implements the plugin protocol required by the |
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27 HotSpot PrintAssembly option. |
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28 */ |
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29 |
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30 #include "hsdis.h" |
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31 |
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32 #include <sysdep.h> |
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33 #include <libiberty.h> |
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34 #include <bfd.h> |
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35 #include <dis-asm.h> |
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36 |
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37 #ifndef bool |
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38 #define bool int |
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39 #define true 1 |
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40 #define false 0 |
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41 #endif /*bool*/ |
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42 |
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43 /* short names for stuff in hsdis.h */ |
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44 typedef decode_instructions_event_callback_ftype event_callback_t; |
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45 typedef decode_instructions_printf_callback_ftype printf_callback_t; |
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46 |
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47 /* disassemble_info.application_data object */ |
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48 struct hsdis_app_data { |
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49 /* the arguments to decode_instructions */ |
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50 uintptr_t start; uintptr_t end; |
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51 event_callback_t event_callback; void* event_stream; |
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52 printf_callback_t printf_callback; void* printf_stream; |
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53 bool losing; |
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54 |
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55 /* the architecture being disassembled */ |
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56 const char* arch_name; |
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57 const bfd_arch_info_type* arch_info; |
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58 |
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59 /* the disassembler we are going to use: */ |
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60 disassembler_ftype dfn; |
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61 struct disassemble_info dinfo; /* the actual struct! */ |
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62 |
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63 char mach_option[64]; |
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64 char insn_options[256]; |
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65 }; |
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66 |
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67 #define DECL_APP_DATA(dinfo) \ |
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68 struct hsdis_app_data* app_data = (struct hsdis_app_data*) (dinfo)->application_data |
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69 |
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70 #define DECL_EVENT_CALLBACK(app_data) \ |
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71 event_callback_t event_callback = (app_data)->event_callback; \ |
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72 void* event_stream = (app_data)->event_stream |
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73 |
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74 #define DECL_PRINTF_CALLBACK(app_data) \ |
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75 printf_callback_t printf_callback = (app_data)->printf_callback; \ |
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76 void* printf_stream = (app_data)->printf_stream |
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77 |
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78 |
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79 static void print_help(struct hsdis_app_data* app_data, |
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80 const char* msg, const char* arg); |
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81 static void setup_app_data(struct hsdis_app_data* app_data, |
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82 const char* options); |
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83 static const char* format_insn_close(const char* close, |
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84 disassemble_info* dinfo, |
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85 char* buf, size_t bufsize); |
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86 |
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87 void* |
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88 #ifdef DLL_ENTRY |
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89 DLL_ENTRY |
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90 #endif |
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91 decode_instructions(void* start_pv, void* end_pv, |
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92 event_callback_t event_callback_arg, void* event_stream_arg, |
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93 printf_callback_t printf_callback_arg, void* printf_stream_arg, |
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94 const char* options) { |
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95 struct hsdis_app_data app_data; |
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96 memset(&app_data, 0, sizeof(app_data)); |
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97 app_data.start = (uintptr_t) start_pv; |
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98 app_data.end = (uintptr_t) end_pv; |
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99 app_data.event_callback = event_callback_arg; |
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100 app_data.event_stream = event_stream_arg; |
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101 app_data.printf_callback = printf_callback_arg; |
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102 app_data.printf_stream = printf_stream_arg; |
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103 |
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104 setup_app_data(&app_data, options); |
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105 char buf[128]; |
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106 |
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107 { |
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108 /* now reload everything from app_data: */ |
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109 DECL_EVENT_CALLBACK(&app_data); |
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110 DECL_PRINTF_CALLBACK(&app_data); |
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111 uintptr_t start = app_data.start; |
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112 uintptr_t end = app_data.end; |
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113 uintptr_t p = start; |
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114 |
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115 (*event_callback)(event_stream, "insns", (void*)start); |
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116 |
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117 (*event_callback)(event_stream, "mach name='%s'", |
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118 (void*) app_data.arch_info->printable_name); |
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119 if (app_data.dinfo.bytes_per_line != 0) { |
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120 (*event_callback)(event_stream, "format bytes-per-line='%p'/", |
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121 (void*)(intptr_t) app_data.dinfo.bytes_per_line); |
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122 } |
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123 |
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124 while (p < end && !app_data.losing) { |
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125 (*event_callback)(event_stream, "insn", (void*) p); |
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126 |
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127 /* reset certain state, so we can read it with confidence */ |
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128 app_data.dinfo.insn_info_valid = 0; |
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129 app_data.dinfo.branch_delay_insns = 0; |
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130 app_data.dinfo.data_size = 0; |
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131 app_data.dinfo.insn_type = 0; |
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132 |
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133 int size = (*app_data.dfn)((bfd_vma) p, &app_data.dinfo); |
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134 |
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135 if (size > 0) p += size; |
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136 else app_data.losing = true; |
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137 |
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138 const char* insn_close = format_insn_close("/insn", &app_data.dinfo, |
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139 buf, sizeof(buf)); |
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140 (*event_callback)(event_stream, insn_close, (void*) p); |
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141 |
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142 /* follow each complete insn by a nice newline */ |
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143 (*printf_callback)(printf_stream, "\n"); |
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144 } |
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145 |
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146 (*event_callback)(event_stream, "/insns", (void*) p); |
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147 return (void*) p; |
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148 } |
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149 } |
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150 |
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151 /* take the address of the function, for luck, and also test the typedef: */ |
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152 const decode_instructions_ftype decode_instructions_address = &decode_instructions; |
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153 |
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154 static const char* format_insn_close(const char* close, |
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155 disassemble_info* dinfo, |
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156 char* buf, size_t bufsize) { |
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157 if (!dinfo->insn_info_valid) |
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158 return close; |
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159 enum dis_insn_type itype = dinfo->insn_type; |
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160 int dsize = dinfo->data_size, delays = dinfo->branch_delay_insns; |
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161 if ((itype == dis_nonbranch && (dsize | delays) == 0) |
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162 || (strlen(close) + 3*20 > bufsize)) |
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163 return close; |
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164 |
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165 const char* type = "unknown"; |
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166 switch (itype) { |
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167 case dis_nonbranch: type = NULL; break; |
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168 case dis_branch: type = "branch"; break; |
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169 case dis_condbranch: type = "condbranch"; break; |
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170 case dis_jsr: type = "jsr"; break; |
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171 case dis_condjsr: type = "condjsr"; break; |
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172 case dis_dref: type = "dref"; break; |
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173 case dis_dref2: type = "dref2"; break; |
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174 } |
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175 |
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176 strcpy(buf, close); |
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177 char* p = buf; |
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178 if (type) sprintf(p += strlen(p), " type='%s'", type); |
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179 if (dsize) sprintf(p += strlen(p), " dsize='%d'", dsize); |
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180 if (delays) sprintf(p += strlen(p), " delay='%d'", delays); |
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181 return buf; |
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182 } |
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183 |
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184 /* handler functions */ |
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185 |
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186 static int |
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187 hsdis_read_memory_func(bfd_vma memaddr, |
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188 bfd_byte* myaddr, |
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189 unsigned int length, |
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190 struct disassemble_info* dinfo) { |
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191 uintptr_t memaddr_p = (uintptr_t) memaddr; |
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192 DECL_APP_DATA(dinfo); |
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193 if (memaddr_p + length > app_data->end) { |
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194 /* read is out of bounds */ |
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195 return EIO; |
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196 } else { |
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197 memcpy(myaddr, (bfd_byte*) memaddr_p, length); |
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198 return 0; |
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199 } |
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200 } |
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201 |
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202 static void |
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203 hsdis_print_address_func(bfd_vma vma, struct disassemble_info* dinfo) { |
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204 /* the actual value to print: */ |
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205 void* addr_value = (void*) (uintptr_t) vma; |
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206 DECL_APP_DATA(dinfo); |
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207 DECL_EVENT_CALLBACK(app_data); |
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208 |
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209 /* issue the event: */ |
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210 void* result = |
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211 (*event_callback)(event_stream, "addr/", addr_value); |
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212 if (result == NULL) { |
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213 /* event declined */ |
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214 generic_print_address(vma, dinfo); |
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215 } |
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216 } |
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217 |
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218 |
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219 /* configuration */ |
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220 |
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221 static void set_optional_callbacks(struct hsdis_app_data* app_data); |
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222 static void parse_caller_options(struct hsdis_app_data* app_data, |
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223 const char* caller_options); |
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224 static const char* native_arch_name(); |
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225 static enum bfd_endian native_endian(); |
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226 static const bfd_arch_info_type* find_arch_info(const char* arch_nane); |
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227 static bfd* get_native_bfd(const bfd_arch_info_type* arch_info, |
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228 /* to avoid malloc: */ |
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229 bfd* empty_bfd, bfd_target* empty_xvec); |
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230 static void init_disassemble_info_from_bfd(struct disassemble_info* dinfo, |
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231 void *stream, |
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232 fprintf_ftype fprintf_func, |
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233 bfd* bfd, |
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234 char* disassembler_options); |
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235 static void parse_fake_insn(disassembler_ftype dfn, |
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236 struct disassemble_info* dinfo); |
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237 |
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238 static void setup_app_data(struct hsdis_app_data* app_data, |
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239 const char* caller_options) { |
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240 /* Make reasonable defaults for null callbacks. |
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241 A non-null stream for a null callback is assumed to be a FILE* for output. |
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242 Events are rendered as XML. |
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243 */ |
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244 set_optional_callbacks(app_data); |
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245 |
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246 /* Look into caller_options for anything interesting. */ |
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247 if (caller_options != NULL) |
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248 parse_caller_options(app_data, caller_options); |
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249 |
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250 /* Discover which architecture we are going to disassemble. */ |
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251 app_data->arch_name = &app_data->mach_option[0]; |
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252 if (app_data->arch_name[0] == '\0') |
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253 app_data->arch_name = native_arch_name(); |
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254 app_data->arch_info = find_arch_info(app_data->arch_name); |
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255 |
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256 /* Make a fake bfd to hold the arch. and byteorder info. */ |
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257 struct { |
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258 bfd_target empty_xvec; |
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259 bfd empty_bfd; |
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260 } buf; |
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261 bfd* native_bfd = get_native_bfd(app_data->arch_info, |
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262 /* to avoid malloc: */ |
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263 &buf.empty_bfd, &buf.empty_xvec); |
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264 init_disassemble_info_from_bfd(&app_data->dinfo, |
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265 app_data->printf_stream, |
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266 app_data->printf_callback, |
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267 native_bfd, |
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268 app_data->insn_options); |
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269 |
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270 /* Finish linking together the various callback blocks. */ |
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271 app_data->dinfo.application_data = (void*) app_data; |
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272 app_data->dfn = disassembler(native_bfd); |
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273 app_data->dinfo.print_address_func = hsdis_print_address_func; |
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274 app_data->dinfo.read_memory_func = hsdis_read_memory_func; |
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275 |
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276 if (app_data->dfn == NULL) { |
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277 const char* bad = app_data->arch_name; |
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278 static bool complained; |
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279 if (bad == &app_data->mach_option[0]) |
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280 print_help(app_data, "bad mach=%s", bad); |
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281 else if (!complained) |
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282 print_help(app_data, "bad native mach=%s; please port hsdis to this platform", bad); |
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283 complained = true; |
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284 /* must bail out */ |
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285 app_data->losing = true; |
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286 return; |
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287 } |
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288 |
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289 parse_fake_insn(app_data->dfn, &app_data->dinfo); |
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290 } |
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291 |
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292 |
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293 /* ignore all events, return a null */ |
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294 static void* null_event_callback(void* ignore_stream, const char* ignore_event, void* arg) { |
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295 return NULL; |
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parents:
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|
296 } |
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297 |
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298 /* print all events as XML markup */ |
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299 static void* xml_event_callback(void* stream, const char* event, void* arg) { |
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300 FILE* fp = (FILE*) stream; |
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|
301 #define NS_PFX "dis:" |
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302 if (event[0] != '/') { |
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303 /* issue the tag, with or without a formatted argument */ |
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304 fprintf(fp, "<"NS_PFX); |
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305 fprintf(fp, event, arg); |
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306 fprintf(fp, ">"); |
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|
307 } else { |
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308 ++event; /* skip slash */ |
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309 const char* argp = strchr(event, ' '); |
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310 if (argp == NULL) { |
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311 /* no arguments; just issue the closing tag */ |
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312 fprintf(fp, "</"NS_PFX"%s>", event); |
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313 } else { |
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314 /* split out the closing attributes as <dis:foo_done attr='val'/> */ |
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315 int event_prefix = (argp - event); |
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316 fprintf(fp, "<"NS_PFX"%.*s_done", event_prefix, event); |
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317 fprintf(fp, argp, arg); |
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318 fprintf(fp, "/></"NS_PFX"%.*s>", event_prefix, event); |
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319 } |
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320 } |
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321 return NULL; |
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|
322 } |
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323 |
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324 static void set_optional_callbacks(struct hsdis_app_data* app_data) { |
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325 if (app_data->printf_callback == NULL) { |
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326 int (*fprintf_callback)(FILE*, const char*, ...) = &fprintf; |
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327 FILE* fprintf_stream = stdout; |
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328 app_data->printf_callback = (printf_callback_t) fprintf_callback; |
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329 if (app_data->printf_stream == NULL) |
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330 app_data->printf_stream = (void*) fprintf_stream; |
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|
331 } |
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332 if (app_data->event_callback == NULL) { |
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333 if (app_data->event_stream == NULL) |
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334 app_data->event_callback = &null_event_callback; |
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|
335 else |
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336 app_data->event_callback = &xml_event_callback; |
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|
337 } |
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338 |
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|
339 } |
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|
340 |
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341 static void parse_caller_options(struct hsdis_app_data* app_data, const char* caller_options) { |
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342 char* iop_base = app_data->insn_options; |
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343 char* iop_limit = iop_base + sizeof(app_data->insn_options) - 1; |
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344 char* iop = iop_base; |
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345 const char* p; |
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346 for (p = caller_options; p != NULL; ) { |
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347 const char* q = strchr(p, ','); |
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348 size_t plen = (q == NULL) ? strlen(p) : ((q++) - p); |
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349 if (plen == 4 && strncmp(p, "help", plen) == 0) { |
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350 print_help(app_data, NULL, NULL); |
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|
351 } else if (plen >= 5 && strncmp(p, "mach=", 5) == 0) { |
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352 char* mach_option = app_data->mach_option; |
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|
353 size_t mach_size = sizeof(app_data->mach_option); |
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|
354 mach_size -= 1; /*leave room for the null*/ |
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|
355 if (plen > mach_size) plen = mach_size; |
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|
356 strncpy(mach_option, p, plen); |
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|
357 mach_option[plen] = '\0'; |
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|
358 } else if (plen > 6 && strncmp(p, "hsdis-", 6)) { |
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|
359 // do not pass these to the next level |
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|
360 } else { |
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|
361 /* just copy it; {i386,sparc}-dis.c might like to see it */ |
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|
362 if (iop > iop_base && iop < iop_limit) (*iop++) = ','; |
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|
363 if (iop + plen > iop_limit) |
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|
364 plen = iop_limit - iop; |
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|
365 strncpy(iop, p, plen); |
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|
366 iop += plen; |
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|
367 } |
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|
368 p = q; |
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|
369 } |
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|
370 } |
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diff
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|
371 |
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|
372 static void print_help(struct hsdis_app_data* app_data, |
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|
373 const char* msg, const char* arg) { |
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|
374 DECL_PRINTF_CALLBACK(app_data); |
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|
375 if (msg != NULL) { |
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|
376 (*printf_callback)(printf_stream, "hsdis: "); |
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|
377 (*printf_callback)(printf_stream, msg, arg); |
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|
378 (*printf_callback)(printf_stream, "\n"); |
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|
379 } |
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parents:
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|
380 (*printf_callback)(printf_stream, "hsdis output options:\n"); |
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parents:
diff
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|
381 if (printf_callback == (printf_callback_t) &fprintf) |
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|
382 disassembler_usage((FILE*) printf_stream); |
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parents:
diff
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|
383 else |
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|
384 disassembler_usage(stderr); /* better than nothing */ |
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|
385 (*printf_callback)(printf_stream, " mach=<arch> select disassembly mode\n"); |
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diff
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|
386 #if defined(LIBARCH_i386) || defined(LIBARCH_amd64) |
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|
387 (*printf_callback)(printf_stream, " mach=i386 select 32-bit mode\n"); |
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|
388 (*printf_callback)(printf_stream, " mach=x86-64 select 64-bit mode\n"); |
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parents:
diff
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|
389 (*printf_callback)(printf_stream, " suffix always print instruction suffix\n"); |
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jrose
parents:
diff
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|
390 #endif |
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parents:
diff
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|
391 (*printf_callback)(printf_stream, " help print this message\n"); |
c7c777385a15
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jrose
parents:
diff
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|
392 } |
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jrose
parents:
diff
changeset
|
393 |
c7c777385a15
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jrose
parents:
diff
changeset
|
394 |
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jrose
parents:
diff
changeset
|
395 /* low-level bfd and arch stuff that binutils doesn't do for us */ |
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parents:
diff
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|
396 |
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parents:
diff
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|
397 static const bfd_arch_info_type* find_arch_info(const char* arch_name) { |
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|
398 const bfd_arch_info_type* arch_info = bfd_scan_arch(arch_name); |
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parents:
diff
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|
399 if (arch_info == NULL) { |
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diff
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|
400 extern const bfd_arch_info_type bfd_default_arch_struct; |
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|
401 arch_info = &bfd_default_arch_struct; |
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parents:
diff
changeset
|
402 } |
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parents:
diff
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|
403 return arch_info; |
c7c777385a15
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parents:
diff
changeset
|
404 } |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
diff
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|
405 |
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parents:
diff
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|
406 static const char* native_arch_name() { |
c7c777385a15
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parents:
diff
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|
407 const char* res = HOTSPOT_LIB_ARCH; |
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parents:
diff
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|
408 #ifdef LIBARCH_amd64 |
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parents:
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|
409 res = "i386:x86-64"; |
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diff
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|
410 #endif |
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parents:
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|
411 #ifdef LIBARCH_sparc |
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parents:
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|
412 res = "sparc:v8plusb"; |
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parents:
diff
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|
413 #endif |
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parents:
diff
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|
414 #ifdef LIBARCH_sparc |
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parents:
diff
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|
415 res = "sparc:v8plusb"; |
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parents:
diff
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|
416 #endif |
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parents:
diff
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|
417 #ifdef LIBARCH_sparcv9 |
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parents:
diff
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|
418 res = "sparc:v9b"; |
c7c777385a15
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parents:
diff
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|
419 #endif |
c7c777385a15
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parents:
diff
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|
420 if (res == NULL) |
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parents:
diff
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|
421 res = "HOTSPOT_LIB_ARCH is not set in Makefile!"; |
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parents:
diff
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|
422 return res; |
c7c777385a15
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parents:
diff
changeset
|
423 } |
c7c777385a15
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parents:
diff
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|
424 |
c7c777385a15
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parents:
diff
changeset
|
425 static enum bfd_endian native_endian() { |
c7c777385a15
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parents:
diff
changeset
|
426 int32_t endian_test = 'x'; |
c7c777385a15
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parents:
diff
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|
427 if (*(const char*) &endian_test == 'x') |
c7c777385a15
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parents:
diff
changeset
|
428 return BFD_ENDIAN_LITTLE; |
c7c777385a15
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parents:
diff
changeset
|
429 else |
c7c777385a15
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jrose
parents:
diff
changeset
|
430 return BFD_ENDIAN_BIG; |
c7c777385a15
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parents:
diff
changeset
|
431 } |
c7c777385a15
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diff
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|
432 |
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parents:
diff
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|
433 static bfd* get_native_bfd(const bfd_arch_info_type* arch_info, |
c7c777385a15
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diff
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|
434 bfd* empty_bfd, bfd_target* empty_xvec) { |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
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parents:
diff
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|
435 memset(empty_bfd, 0, sizeof(*empty_bfd)); |
c7c777385a15
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
diff
changeset
|
436 memset(empty_xvec, 0, sizeof(*empty_xvec)); |
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437 empty_xvec->flavour = bfd_target_unknown_flavour; |
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438 empty_xvec->byteorder = native_endian(); |
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439 empty_bfd->xvec = empty_xvec; |
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440 empty_bfd->arch_info = arch_info; |
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441 return empty_bfd; |
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442 } |
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443 |
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444 static int read_zero_data_only(bfd_vma ignore_p, |
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445 bfd_byte* myaddr, unsigned int length, |
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446 struct disassemble_info *ignore_info) { |
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447 memset(myaddr, 0, length); |
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448 return 0; |
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449 } |
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450 static int print_to_dev_null(void* ignore_stream, const char* ignore_format, ...) { |
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451 return 0; |
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452 } |
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453 |
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454 /* Prime the pump by running the selected disassembler on a null input. |
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455 This forces the machine-specific disassembler to divulge invariant |
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456 information like bytes_per_line. |
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457 */ |
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458 static void parse_fake_insn(disassembler_ftype dfn, |
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459 struct disassemble_info* dinfo) { |
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460 typedef int (*read_memory_ftype) |
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461 (bfd_vma memaddr, bfd_byte *myaddr, unsigned int length, |
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462 struct disassemble_info *info); |
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463 read_memory_ftype read_memory_func = dinfo->read_memory_func; |
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464 fprintf_ftype fprintf_func = dinfo->fprintf_func; |
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465 |
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466 dinfo->read_memory_func = &read_zero_data_only; |
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467 dinfo->fprintf_func = &print_to_dev_null; |
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468 (*dfn)(0, dinfo); |
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469 |
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470 // put it back: |
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471 dinfo->read_memory_func = read_memory_func; |
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472 dinfo->fprintf_func = fprintf_func; |
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473 } |
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474 |
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475 static void init_disassemble_info_from_bfd(struct disassemble_info* dinfo, |
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476 void *stream, |
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477 fprintf_ftype fprintf_func, |
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478 bfd* abfd, |
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479 char* disassembler_options) { |
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480 init_disassemble_info(dinfo, stream, fprintf_func); |
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481 |
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482 dinfo->flavour = bfd_get_flavour(abfd); |
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483 dinfo->arch = bfd_get_arch(abfd); |
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484 dinfo->mach = bfd_get_mach(abfd); |
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485 dinfo->disassembler_options = disassembler_options; |
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486 dinfo->octets_per_byte = bfd_octets_per_byte (abfd); |
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487 dinfo->skip_zeroes = sizeof(void*) * 2; |
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488 dinfo->skip_zeroes_at_end = sizeof(void*)-1; |
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489 dinfo->disassembler_needs_relocs = FALSE; |
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490 |
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491 if (bfd_big_endian(abfd)) |
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492 dinfo->display_endian = dinfo->endian = BFD_ENDIAN_BIG; |
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493 else if (bfd_little_endian(abfd)) |
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494 dinfo->display_endian = dinfo->endian = BFD_ENDIAN_LITTLE; |
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495 else |
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496 dinfo->endian = native_endian(); |
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497 |
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498 disassemble_init_for_target(dinfo); |
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499 } |