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1 /* |
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2 |
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3 Copyright (C) 2000,2002,2004,2005,2006 Silicon Graphics, Inc. All Rights Reserved. |
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4 Portions Copyright (C) 2007 David Anderson. All Rights Reserved. |
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5 |
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6 This program is free software; you can redistribute it and/or modify it |
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7 under the terms of version 2.1 of the GNU Lesser General Public License |
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8 as published by the Free Software Foundation. |
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9 |
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10 This program is distributed in the hope that it would be useful, but |
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11 WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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13 |
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14 Further, this software is distributed without any warranty that it is |
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15 free of the rightful claim of any third person regarding infringement |
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16 or the like. Any license provided herein, whether implied or |
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17 otherwise, applies only to this software file. Patent licenses, if |
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18 any, provided herein do not apply to combinations of this program with |
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19 other software, or any other product whatsoever. |
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20 |
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21 You should have received a copy of the GNU Lesser General Public |
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22 License along with this program; if not, write the Free Software |
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23 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301, |
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24 USA. |
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25 |
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26 Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane, |
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27 Mountain View, CA 94043, or: |
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28 |
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29 http://www.sgi.com |
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30 |
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31 For further information regarding this notice, see: |
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32 |
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33 http://oss.sgi.com/projects/GenInfo/NoticeExplan |
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34 |
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35 */ |
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36 /* The address of the Free Software Foundation is |
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37 Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
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38 Boston, MA 02110-1301, USA. |
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39 SGI has moved from the Crittenden Lane address. |
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40 */ |
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41 |
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42 |
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43 |
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44 |
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45 #include "config.h" |
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46 #include "dwarf_incl.h" |
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47 #include <stdio.h> |
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48 #include <time.h> |
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49 #include "dwarf_line.h" |
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50 #ifdef HAVE_ALLOCA_H |
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51 #include <alloca.h> |
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52 #endif |
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53 |
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54 /* FIXME Need to add prologue_end epilogue_begin isa fields. */ |
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55 static void |
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56 print_line_header(void) |
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57 { |
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58 printf |
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59 (" s b e\n" |
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60 " t l s\n" |
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61 " m c e\n" |
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62 " section op col t k q\n" |
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63 " offset code address file line umn ? ? ?\n"); |
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64 } |
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65 |
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66 /* FIXME: print new line values: prologue_end epilogue_begin isa */ |
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67 static void |
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68 print_line_detail(char *prefix, |
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69 int opcode, |
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70 unsigned long long address, |
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71 unsigned long file, |
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72 unsigned long line, |
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73 unsigned long column, |
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74 int is_stmt, int basic_block, int end_sequence, |
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75 int prologue_end, int epilogue_begin, int isa) |
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76 { |
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77 printf("%-15s %2d 0x%08llx " |
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78 "%2lu %4lu %2lu %1d %1d %1d\n", |
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79 prefix, |
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80 (int) opcode, |
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81 (long long) address, |
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82 (unsigned long) file, |
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83 (unsigned long) line, |
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84 (unsigned long) column, |
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85 (int) is_stmt, (int) basic_block, (int) end_sequence); |
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86 |
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87 } |
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88 |
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89 |
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90 /* |
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91 return DW_DLV_OK if ok. else DW_DLV_NO_ENTRY or DW_DLV_ERROR |
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92 */ |
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93 int |
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94 _dwarf_internal_printlines(Dwarf_Die die, Dwarf_Error * error) |
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95 { |
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96 /* |
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97 This pointer is used to scan the portion of the .debug_line |
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98 section for the current cu. */ |
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99 Dwarf_Small *line_ptr; |
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100 Dwarf_Small *orig_line_ptr; |
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101 |
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102 /* |
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103 This points to the last byte of the .debug_line portion for the |
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104 current cu. */ |
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105 Dwarf_Small *line_ptr_end = 0; |
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106 |
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107 /* |
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108 Pointer to a DW_AT_stmt_list attribute in case it exists in the |
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109 die. */ |
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110 Dwarf_Attribute stmt_list_attr; |
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111 |
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112 /* Pointer to DW_AT_comp_dir attribute in die. */ |
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113 Dwarf_Attribute comp_dir_attr; |
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114 |
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115 /* Pointer to name of compilation directory. */ |
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116 Dwarf_Small *comp_dir = NULL; |
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117 |
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118 /* |
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119 Offset into .debug_line specified by a DW_AT_stmt_list |
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120 attribute. */ |
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121 Dwarf_Unsigned line_offset; |
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122 |
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123 struct Line_Table_Prefix_s prefix; |
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124 |
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125 |
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126 /* These are the state machine state variables. */ |
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127 Dwarf_Addr address = 0; |
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128 Dwarf_Word file = 1; |
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129 Dwarf_Word line = 1; |
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130 Dwarf_Word column = 0; |
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131 Dwarf_Bool is_stmt = false; |
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132 Dwarf_Bool basic_block = false; |
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133 Dwarf_Bool end_sequence = false; |
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134 Dwarf_Bool prologue_end = false; |
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135 Dwarf_Bool epilogue_begin = false; |
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136 Dwarf_Small isa = 0; |
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137 |
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138 |
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139 Dwarf_Sword i; |
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140 |
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141 /* |
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142 This is the current opcode read from the statement program. */ |
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143 Dwarf_Small opcode; |
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144 |
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145 |
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146 /* |
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147 These variables are used to decode leb128 numbers. Leb128_num |
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148 holds the decoded number, and leb128_length is its length in |
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149 bytes. */ |
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150 Dwarf_Word leb128_num; |
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151 Dwarf_Word leb128_length; |
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152 Dwarf_Sword advance_line; |
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153 |
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154 /* |
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155 This is the operand of the latest fixed_advance_pc extended |
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156 opcode. */ |
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157 Dwarf_Half fixed_advance_pc; |
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158 |
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159 |
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160 /* The Dwarf_Debug this die belongs to. */ |
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161 Dwarf_Debug dbg; |
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162 int resattr; |
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163 int lres; |
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164 |
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165 int res; |
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166 |
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167 /* ***** BEGIN CODE ***** */ |
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168 |
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169 if (error != NULL) |
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170 *error = NULL; |
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171 |
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172 CHECK_DIE(die, DW_DLV_ERROR); |
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173 dbg = die->di_cu_context->cc_dbg; |
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174 |
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175 res = |
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176 _dwarf_load_section(dbg, |
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177 dbg->de_debug_line_index, |
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178 &dbg->de_debug_line, error); |
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179 if (res != DW_DLV_OK) { |
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180 return res; |
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181 } |
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182 |
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183 resattr = dwarf_attr(die, DW_AT_stmt_list, &stmt_list_attr, error); |
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184 if (resattr != DW_DLV_OK) { |
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185 return resattr; |
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186 } |
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187 |
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188 |
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189 |
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190 lres = dwarf_formudata(stmt_list_attr, &line_offset, error); |
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191 if (lres != DW_DLV_OK) { |
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192 return lres; |
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193 } |
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194 |
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195 if (line_offset >= dbg->de_debug_line_size) { |
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196 _dwarf_error(dbg, error, DW_DLE_LINE_OFFSET_BAD); |
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197 return (DW_DLV_ERROR); |
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198 } |
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199 orig_line_ptr = dbg->de_debug_line; |
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200 line_ptr = dbg->de_debug_line + line_offset; |
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201 dwarf_dealloc(dbg, stmt_list_attr, DW_DLA_ATTR); |
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202 |
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203 /* |
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204 If die has DW_AT_comp_dir attribute, get the string that names |
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205 the compilation directory. */ |
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206 resattr = dwarf_attr(die, DW_AT_comp_dir, &comp_dir_attr, error); |
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207 if (resattr == DW_DLV_ERROR) { |
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208 return resattr; |
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209 } |
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210 if (resattr == DW_DLV_OK) { |
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211 int cres; |
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212 char *cdir; |
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213 |
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214 cres = dwarf_formstring(comp_dir_attr, &cdir, error); |
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215 if (cres == DW_DLV_ERROR) { |
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216 return cres; |
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217 } else if (cres == DW_DLV_OK) { |
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218 comp_dir = (Dwarf_Small *) cdir; |
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219 } |
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220 } |
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221 if (resattr == DW_DLV_OK) { |
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222 dwarf_dealloc(dbg, comp_dir_attr, DW_DLA_ATTR); |
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223 } |
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224 |
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225 dwarf_init_line_table_prefix(&prefix); |
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226 { |
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227 Dwarf_Small *line_ptr_out = 0; |
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228 int dres = dwarf_read_line_table_prefix(dbg, |
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229 line_ptr, |
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230 dbg-> |
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231 de_debug_line_size - |
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232 line_offset, |
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233 &line_ptr_out, |
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234 &prefix, error); |
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235 |
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236 if (dres == DW_DLV_ERROR) { |
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237 dwarf_free_line_table_prefix(&prefix); |
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238 return dres; |
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239 } |
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240 if (dres == DW_DLV_NO_ENTRY) { |
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241 dwarf_free_line_table_prefix(&prefix); |
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242 return dres; |
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243 } |
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244 line_ptr_end = prefix.pf_line_ptr_end; |
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245 line_ptr = line_ptr_out; |
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246 } |
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247 |
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248 |
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249 |
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250 printf("total line info length %ld bytes, " |
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251 "line offset 0x%llx %lld\n", |
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252 (long) prefix.pf_total_length, |
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253 (long long) line_offset, (long long) line_offset); |
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254 printf("compilation_directory %s\n", |
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255 comp_dir ? ((char *) comp_dir) : ""); |
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256 |
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257 printf(" min instruction length %d\n", |
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258 (int) prefix.pf_minimum_instruction_length); |
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259 printf(" default is stmt %d\n", (int) |
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260 prefix.pf_default_is_stmt); |
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261 printf(" line base %d\n", (int) |
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262 prefix.pf_line_base); |
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263 printf(" line_range %d\n", (int) |
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264 prefix.pf_line_range); |
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265 |
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266 |
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267 for (i = 1; i < prefix.pf_opcode_base; i++) { |
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268 printf(" opcode[%d] length %d\n", (int) i, |
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269 (int) prefix.pf_opcode_length_table[i - 1]); |
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270 } |
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271 |
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272 for (i = 0; i < prefix.pf_include_directories_count; ++i) { |
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273 printf(" include dir[%d] %s\n", |
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274 (int) i, prefix.pf_include_directories[i]); |
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275 } |
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276 |
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277 |
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278 for (i = 0; i < prefix.pf_files_count; ++i) { |
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279 struct Line_Table_File_Entry_s *lfile = |
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280 prefix.pf_line_table_file_entries + i; |
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281 |
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282 Dwarf_Unsigned tlm2 = lfile->lte_last_modification_time; |
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283 Dwarf_Unsigned di = lfile->lte_directory_index; |
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284 Dwarf_Unsigned fl = lfile->lte_length_of_file; |
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285 |
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286 printf(" file[%d] %s\n", |
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287 (int) i, (char *) lfile->lte_filename); |
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288 |
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289 printf(" dir index %d\n", (int) di); |
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290 { |
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291 time_t tt = (time_t) tlm2; |
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292 |
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293 printf(" last time 0x%x %s", /* ctime supplies |
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294 newline */ |
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295 (unsigned) tlm2, ctime(&tt)); |
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296 } |
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297 printf(" file length %ld 0x%lx\n", |
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298 (long) fl, (unsigned long) fl); |
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299 |
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300 |
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301 } |
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302 |
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303 |
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304 { |
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305 unsigned long long offset = line_ptr - orig_line_ptr; |
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306 |
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307 printf(" statement prog offset in section: %llu 0x%llx\n", |
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308 offset, offset); |
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309 } |
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310 |
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311 /* Initialize the part of the state machine dependent on the |
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312 prefix. */ |
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313 is_stmt = prefix.pf_default_is_stmt; |
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314 |
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315 |
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316 print_line_header(); |
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317 /* Start of statement program. */ |
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318 while (line_ptr < line_ptr_end) { |
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319 int type; |
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320 |
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321 printf(" [0x%06llx] ", (long long) (line_ptr - orig_line_ptr)); |
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322 opcode = *(Dwarf_Small *) line_ptr; |
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323 line_ptr++; |
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324 /* 'type' is the output */ |
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325 WHAT_IS_OPCODE(type, opcode, prefix.pf_opcode_base, |
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326 prefix.pf_opcode_length_table, line_ptr, |
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327 prefix.pf_std_op_count); |
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328 |
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329 if (type == LOP_DISCARD) { |
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330 int oc; |
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331 int opcnt = prefix.pf_opcode_length_table[opcode]; |
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332 |
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333 printf(" DISCARD standard opcode %d with %d operands: " |
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334 "not understood:", opcode, opcnt); |
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335 for (oc = 0; oc < opcnt; oc++) { |
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336 /* |
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337 * Read and discard operands we don't |
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338 * understand. |
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339 * Arbitrary choice of unsigned read. |
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340 * Signed read would work as well. |
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341 */ |
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342 Dwarf_Unsigned utmp2; |
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343 |
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344 DECODE_LEB128_UWORD(line_ptr, utmp2); |
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345 printf(" %llu (0x%llx)", |
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346 (unsigned long long) utmp2, |
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347 (unsigned long long) utmp2); |
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348 } |
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349 |
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350 printf("\n"); |
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351 /* do nothing, necessary ops done */ |
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352 } else if (type == LOP_SPECIAL) { |
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353 /* This op code is a special op in the object, no matter |
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354 that it might fall into the standard op range in this |
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355 compile Thatis, these are special opcodes between |
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356 special_opcode_base and MAX_LINE_OP_CODE. (including |
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357 special_opcode_base and MAX_LINE_OP_CODE) */ |
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358 char special[50]; |
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359 unsigned origop = opcode; |
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360 |
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361 opcode = opcode - prefix.pf_opcode_base; |
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362 address = address + prefix.pf_minimum_instruction_length * |
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363 (opcode / prefix.pf_line_range); |
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364 line = |
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365 line + prefix.pf_line_base + |
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366 opcode % prefix.pf_line_range; |
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367 |
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368 sprintf(special, "Specialop %3u", origop); |
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369 print_line_detail(special, |
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370 opcode, address, (int) file, line, column, |
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371 is_stmt, basic_block, end_sequence, |
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372 prologue_end, epilogue_begin, isa); |
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373 |
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374 basic_block = false; |
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375 |
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376 } else if (type == LOP_STANDARD) { |
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377 switch (opcode) { |
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378 |
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379 case DW_LNS_copy:{ |
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380 |
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381 print_line_detail("DW_LNS_copy", |
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382 opcode, address, file, line, |
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383 column, is_stmt, basic_block, |
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384 end_sequence, prologue_end, |
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385 epilogue_begin, isa); |
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386 |
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387 basic_block = false; |
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388 break; |
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389 } |
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390 |
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391 case DW_LNS_advance_pc:{ |
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392 Dwarf_Unsigned utmp2; |
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393 |
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394 |
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395 DECODE_LEB128_UWORD(line_ptr, utmp2); |
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396 printf("DW_LNS_advance_pc val %lld 0x%llx\n", |
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397 (long long) (Dwarf_Word) utmp2, |
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398 (long long) (Dwarf_Word) utmp2); |
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399 leb128_num = (Dwarf_Word) utmp2; |
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400 address = |
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401 address + |
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402 prefix.pf_minimum_instruction_length * |
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403 leb128_num; |
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404 break; |
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405 } |
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406 |
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407 case DW_LNS_advance_line:{ |
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408 Dwarf_Signed stmp; |
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409 |
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410 |
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411 DECODE_LEB128_SWORD(line_ptr, stmp); |
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412 advance_line = (Dwarf_Sword) stmp; |
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413 printf("DW_LNS_advance_line val %lld 0x%llx\n", |
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414 (long long) advance_line, |
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415 (long long) advance_line); |
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416 line = line + advance_line; |
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417 break; |
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418 } |
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419 |
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420 case DW_LNS_set_file:{ |
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421 Dwarf_Unsigned utmp2; |
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422 |
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423 |
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424 DECODE_LEB128_UWORD(line_ptr, utmp2); |
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425 file = (Dwarf_Word) utmp2; |
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426 printf("DW_LNS_set_file %ld\n", (long) file); |
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427 break; |
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428 } |
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429 |
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430 case DW_LNS_set_column:{ |
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431 Dwarf_Unsigned utmp2; |
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432 |
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433 |
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434 DECODE_LEB128_UWORD(line_ptr, utmp2); |
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435 column = (Dwarf_Word) utmp2; |
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436 printf("DW_LNS_set_column val %lld 0x%llx\n", |
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437 (long long) column, (long long) column); |
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438 break; |
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439 } |
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440 |
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441 case DW_LNS_negate_stmt:{ |
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442 is_stmt = !is_stmt; |
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443 printf("DW_LNS_negate_stmt\n"); |
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444 break; |
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445 } |
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446 |
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447 case DW_LNS_set_basic_block:{ |
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448 |
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449 printf("DW_LNS_set_basic_block\n"); |
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450 basic_block = true; |
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451 break; |
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452 } |
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453 |
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454 case DW_LNS_const_add_pc:{ |
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455 opcode = MAX_LINE_OP_CODE - prefix.pf_opcode_base; |
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456 address = |
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457 address + |
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458 prefix.pf_minimum_instruction_length * (opcode / |
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459 prefix. |
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460 pf_line_range); |
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461 |
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462 printf("DW_LNS_const_add_pc new address 0x%llx\n", |
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463 (long long) address); |
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464 break; |
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465 } |
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466 |
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467 case DW_LNS_fixed_advance_pc:{ |
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468 |
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469 READ_UNALIGNED(dbg, fixed_advance_pc, Dwarf_Half, |
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470 line_ptr, sizeof(Dwarf_Half)); |
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471 line_ptr += sizeof(Dwarf_Half); |
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472 address = address + fixed_advance_pc; |
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473 printf("DW_LNS_fixed_advance_pc val %lld 0x%llx" |
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474 " new address 0x%llx\n", |
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475 (long long) fixed_advance_pc, |
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476 (long long) fixed_advance_pc, |
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477 (long long) address); |
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478 break; |
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479 } |
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480 case DW_LNS_set_prologue_end:{ |
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481 |
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482 prologue_end = true; |
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483 printf("DW_LNS_set_prologue_end set true.\n"); |
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484 break; |
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485 |
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486 |
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487 } |
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488 /* New in DWARF3 */ |
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489 case DW_LNS_set_epilogue_begin:{ |
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490 epilogue_begin = true; |
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491 printf("DW_LNS_set_epilogue_begin set true.\n"); |
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492 break; |
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493 } |
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494 |
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495 /* New in DWARF3 */ |
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496 case DW_LNS_set_isa:{ |
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497 Dwarf_Unsigned utmp2; |
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498 |
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499 DECODE_LEB128_UWORD(line_ptr, utmp2); |
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500 isa = utmp2; |
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501 printf("DW_LNS_set_isa new value 0x%llx.\n", |
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502 (unsigned long long) utmp2); |
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503 if (isa != utmp2) { |
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504 /* The value of the isa did not fit in our |
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505 local so we record it wrong. declare an |
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506 error. */ |
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507 dwarf_free_line_table_prefix(&prefix); |
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508 |
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509 _dwarf_error(dbg, error, |
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510 DW_DLE_LINE_NUM_OPERANDS_BAD); |
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511 return (DW_DLV_ERROR); |
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512 } |
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513 break; |
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514 } |
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515 } |
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516 |
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517 |
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518 } else if (type == LOP_EXTENDED) { |
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519 Dwarf_Unsigned utmp3 = 0; |
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520 Dwarf_Word instr_length = 0; |
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521 Dwarf_Small ext_opcode = 0; |
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522 |
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523 DECODE_LEB128_UWORD(line_ptr, utmp3); |
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524 instr_length = (Dwarf_Word) utmp3; |
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525 ext_opcode = *(Dwarf_Small *) line_ptr; |
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526 line_ptr++; |
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527 switch (ext_opcode) { |
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528 |
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529 case DW_LNE_end_sequence:{ |
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530 end_sequence = true; |
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531 |
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532 print_line_detail("DW_LNE_end_sequence extended", |
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533 opcode, address, file, line, |
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534 column, is_stmt, basic_block, |
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535 end_sequence, prologue_end, |
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536 epilogue_begin, isa); |
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537 |
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538 address = 0; |
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539 file = 1; |
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540 line = 1; |
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541 column = 0; |
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542 is_stmt = prefix.pf_default_is_stmt; |
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543 basic_block = false; |
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544 end_sequence = false; |
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545 prologue_end = false; |
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546 epilogue_begin = false; |
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547 |
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548 |
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549 break; |
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550 } |
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551 |
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552 case DW_LNE_set_address:{ |
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553 if (instr_length - 1 == dbg->de_pointer_size) { |
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554 READ_UNALIGNED(dbg, address, Dwarf_Addr, |
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555 line_ptr, dbg->de_pointer_size); |
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556 |
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557 line_ptr += dbg->de_pointer_size; |
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558 printf("DW_LNE_set_address address 0x%llx\n", |
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559 (long long) address); |
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560 } else { |
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561 dwarf_free_line_table_prefix(&prefix); |
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562 _dwarf_error(dbg, error, |
|
563 DW_DLE_LINE_SET_ADDR_ERROR); |
|
564 return (DW_DLV_ERROR); |
|
565 } |
|
566 |
|
567 break; |
|
568 } |
|
569 |
|
570 case DW_LNE_define_file:{ |
|
571 |
|
572 |
|
573 Dwarf_Small *fn; |
|
574 Dwarf_Unsigned di; |
|
575 Dwarf_Unsigned tlm; |
|
576 Dwarf_Unsigned fl; |
|
577 |
|
578 fn = (Dwarf_Small *) line_ptr; |
|
579 line_ptr = line_ptr + strlen((char *) line_ptr) + 1; |
|
580 |
|
581 di = _dwarf_decode_u_leb128(line_ptr, |
|
582 &leb128_length); |
|
583 line_ptr = line_ptr + leb128_length; |
|
584 |
|
585 tlm = _dwarf_decode_u_leb128(line_ptr, |
|
586 &leb128_length); |
|
587 line_ptr = line_ptr + leb128_length; |
|
588 |
|
589 fl = _dwarf_decode_u_leb128(line_ptr, |
|
590 &leb128_length); |
|
591 line_ptr = line_ptr + leb128_length; |
|
592 |
|
593 |
|
594 printf("DW_LNE_define_file %s \n", fn); |
|
595 printf(" dir index %d\n", (int) di); |
|
596 { |
|
597 time_t tt3 = (time_t) tlm; |
|
598 |
|
599 /* ctime supplies newline */ |
|
600 printf(" last time 0x%x %s", |
|
601 (unsigned) tlm, ctime(&tt3)); |
|
602 } |
|
603 printf(" file length %ld 0x%lx\n", |
|
604 (long) fl, (unsigned long) fl); |
|
605 |
|
606 break; |
|
607 } |
|
608 |
|
609 default:{ |
|
610 dwarf_free_line_table_prefix(&prefix); |
|
611 _dwarf_error(dbg, error, |
|
612 DW_DLE_LINE_EXT_OPCODE_BAD); |
|
613 return (DW_DLV_ERROR); |
|
614 } |
|
615 } |
|
616 |
|
617 } |
|
618 } |
|
619 |
|
620 dwarf_free_line_table_prefix(&prefix); |
|
621 return (DW_DLV_OK); |
|
622 } |
|
623 |
|
624 /* |
|
625 This is support for dwarfdump: making it possible |
|
626 for clients wanting line detail info on stdout |
|
627 to get that detail without including internal libdwarf |
|
628 header information. |
|
629 Caller passes in compilation unit DIE. |
|
630 The _dwarf version is obsolete (though supported for |
|
631 compatibility. |
|
632 The dwarf_ version is preferred. |
|
633 */ |
|
634 int |
|
635 dwarf_print_lines(Dwarf_Die die, Dwarf_Error * error) |
|
636 { |
|
637 int res; |
|
638 |
|
639 res = _dwarf_internal_printlines(die, error); |
|
640 if (res != DW_DLV_OK) { |
|
641 return res; |
|
642 } |
|
643 return res; |
|
644 } |
|
645 int |
|
646 _dwarf_print_lines(Dwarf_Die die, Dwarf_Error * error) |
|
647 { |
|
648 int res; |
|
649 |
|
650 res = _dwarf_internal_printlines(die, error); |
|
651 if (res != DW_DLV_OK) { |
|
652 return res; |
|
653 } |
|
654 return res; |
|
655 } |