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annotate docs/CommandGuide/llvm-nm.rst @ 3:9ad51c7bc036

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author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Wed, 15 May 2013 06:43:32 +0900
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1 llvm-nm - list LLVM bitcode and object file's symbol table
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2 ==========================================================
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5 SYNOPSIS
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6 --------
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9 :program:`llvm-nm` [*options*] [*filenames...*]
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12 DESCRIPTION
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13 -----------
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16 The :program:`llvm-nm` utility lists the names of symbols from the LLVM bitcode
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17 files, object files, or :program:`ar` archives containing them, named on the
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18 command line. Each symbol is listed along with some simple information about its
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19 provenance. If no file name is specified, or *-* is used as a file name,
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20 :program:`llvm-nm` will process a file on its standard input stream.
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22 :program:`llvm-nm`'s default output format is the traditional BSD :program:`nm`
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23 output format. Each such output record consists of an (optional) 8-digit
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24 hexadecimal address, followed by a type code character, followed by a name, for
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25 each symbol. One record is printed per line; fields are separated by spaces.
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26 When the address is omitted, it is replaced by 8 spaces.
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28 Type code characters currently supported, and their meanings, are as follows:
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33 Named object is referenced but undefined in this bitcode file
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39 Common (multiple definitions link together into one def)
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45 Weak reference (multiple definitions link together into zero or one definitions)
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49 t
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51 Local function (text) object
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55 T
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57 Global function (text) object
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61 d
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63 Local data object
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67 D
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69 Global data object
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73 ?
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75 Something unrecognizable
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79 Because LLVM bitcode files typically contain objects that are not considered to
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80 have addresses until they are linked into an executable image or dynamically
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81 compiled "just-in-time", :program:`llvm-nm` does not print an address for any
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82 symbol in a LLVM bitcode file, even symbols which are defined in the bitcode
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83 file.
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85
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86 OPTIONS
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87 -------
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90 .. program:: llvm-nm
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93 .. option:: -B (default)
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94
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95 Use BSD output format. Alias for :option:`--format=bsd`.
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98 .. option:: -P
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99
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100 Use POSIX.2 output format. Alias for :option:`--format=posix`.
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101
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103 .. option:: --debug-syms, -a
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105 Show all symbols, even debugger only.
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106
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107
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108 .. option:: --defined-only
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109
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110 Print only symbols defined in this file (as opposed to
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111 symbols which may be referenced by objects in this file, but not
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112 defined in this file.)
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113
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114
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115 .. option:: --dynamic, -D
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116
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117 Display dynamic symbols instead of normal symbols.
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118
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119
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120 .. option:: --extern-only, -g
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121
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122 Print only symbols whose definitions are external; that is, accessible
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123 from other files.
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124
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125
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126 .. option:: --format=format, -f format
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127
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128 Select an output format; *format* may be *sysv*, *posix*, or *bsd*. The default
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129 is *bsd*.
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130
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131
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132 .. option:: -help
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133
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134 Print a summary of command-line options and their meanings.
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135
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136
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137 .. option:: --no-sort, -p
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138
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139 Shows symbols in order encountered.
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140
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141
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142 .. option:: --numeric-sort, -n, -v
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143
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144 Sort symbols by address.
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145
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146
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147 .. option:: --print-file-name, -A, -o
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148
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149 Precede each symbol with the file it came from.
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150
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151
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152 .. option:: --print-size, -S
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153
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154 Show symbol size instead of address.
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155
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156
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157 .. option:: --size-sort
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158
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159 Sort symbols by size.
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160
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161
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162 .. option:: --undefined-only, -u
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163
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164 Print only symbols referenced but not defined in this file.
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165
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166
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167 BUGS
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168 ----
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169
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170
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171 * :program:`llvm-nm` cannot demangle C++ mangled names, like GNU :program:`nm`
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172 can.
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173
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174 * :program:`llvm-nm` does not support the full set of arguments that GNU
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175 :program:`nm` does.
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176
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177
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178 EXIT STATUS
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179 -----------
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180
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181
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182 :program:`llvm-nm` exits with an exit code of zero.
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183
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184
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185 SEE ALSO
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186 --------
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187
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188
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189 llvm-dis|llvm-dis, ar(1), nm(1)