1llvm-nm - list LLVM bitcode and object file's symbol table 2========================================================== 3 4.. program:: llvm-nm 5 6SYNOPSIS 7-------- 8 9:program:`llvm-nm` [*options*] [*filenames...*] 10 11DESCRIPTION 12----------- 13 14The :program:`llvm-nm` utility lists the names of symbols from LLVM bitcode 15files, object files, and archives. Each symbol is listed along with some simple 16information about its provenance. If no filename is specified, *a.out* is used 17as the input. If *-* is used as a filename, :program:`llvm-nm` will read a file 18from its standard input stream. 19 20:program:`llvm-nm`'s default output format is the traditional BSD :program:`nm` 21output format. Each such output record consists of an (optional) 8-digit 22hexadecimal address, followed by a type code character, followed by a name, for 23each symbol. One record is printed per line; fields are separated by spaces. 24When the address is omitted, it is replaced by 8 spaces. 25 26The supported type code characters are as follows. Where both lower and 27upper-case characters are listed for the same meaning, a lower-case character 28represents a local symbol, whilst an upper-case character represents a global 29(external) symbol: 30 31a, A 32 33 Absolute symbol. 34 35b, B 36 37 Uninitialized data (bss) object. 38 39C 40 41 Common symbol. Multiple definitions link together into one definition. 42 43d, D 44 45 Writable data object. 46 47i, I 48 49 COFF: .idata symbol or symbol in a section with IMAGE_SCN_LNK_INFO set. 50 51n 52 53 ELF: local symbol from non-alloc section. 54 55 COFF: debug symbol. 56 57N 58 59 ELF: debug section symbol, or global symbol from non-alloc section. 60 61s, S 62 63 COFF: section symbol. 64 65 Mach-O: absolute symbol or symbol from a section other than __TEXT_EXEC __text, 66 __TEXT __text, __DATA __data, or __DATA __bss. 67 68r, R 69 70 Read-only data object. 71 72t, T 73 74 Code (text) object. 75 76u 77 78 ELF: GNU unique symbol. 79 80U 81 82 Named object is undefined in this file. 83 84v 85 86 ELF: Undefined weak object. It is not a link failure if the object is not 87 defined. 88 89V 90 91 ELF: Defined weak object symbol. This definition will only be used if no 92 regular definitions exist in a link. If multiple weak definitions and no 93 regular definitions exist, one of the weak definitions will be used. 94 95w 96 97 Undefined weak symbol other than an ELF object symbol. It is not a link failure 98 if the symbol is not defined. 99 100W 101 102 Defined weak symbol other than an ELF object symbol. This definition will only 103 be used if no regular definitions exist in a link. If multiple weak definitions 104 and no regular definitions exist, one of the weak definitions will be used. 105 106\- 107 108 Mach-O: N_STAB symbol. 109 110? 111 112 Something unrecognizable. 113 114Because LLVM bitcode files typically contain objects that are not considered to 115have addresses until they are linked into an executable image or dynamically 116compiled "just-in-time", :program:`llvm-nm` does not print an address for any 117symbol in an LLVM bitcode file, even symbols which are defined in the bitcode 118file. 119 120OPTIONS 121------- 122 123.. program:: llvm-nm 124 125.. option:: -B 126 127 Use BSD output format. Alias for ``--format=bsd``. 128 129.. option:: --debug-syms, -a 130 131 Show all symbols, even those usually suppressed. 132 133.. option:: --defined-only 134 135 Print only symbols defined in this file. 136 137.. option:: --demangle, -C 138 139 Demangle symbol names. 140 141.. option:: --dynamic, -D 142 143 Display dynamic symbols instead of normal symbols. 144 145.. option:: --extern-only, -g 146 147 Print only symbols whose definitions are external; that is, accessible from 148 other files. 149 150.. option:: --format=<format>, -f 151 152 Select an output format; *format* may be *sysv*, *posix*, *darwin*, *bsd* or 153 *just-symbols*. 154 The default is *bsd*. 155 156.. option:: --help, -h 157 158 Print a summary of command-line options and their meanings. 159 160.. option:: -j 161 162 Print just the symbol names. Alias for `--format=just-symbols``. 163 164.. option:: -m 165 166 Use Darwin format. Alias for ``--format=darwin``. 167 168.. option:: --no-demangle 169 170 Don't demangle symbol names. This is the default. 171 172.. option:: --no-llvm-bc 173 174 Disable the LLVM bitcode reader. 175 176.. option:: --no-sort, -p 177 178 Show symbols in the order encountered. 179 180.. option:: --no-weak 181 182 Don't print weak symbols. 183 184.. option:: --numeric-sort, -n, -v 185 186 Sort symbols by address. 187 188.. option:: --portability, -P 189 190 Use POSIX.2 output format. Alias for ``--format=posix``. 191 192.. option:: --print-armap 193 194 Print the archive symbol table, in addition to the symbols. 195 196.. option:: --print-file-name, -A, -o 197 198 Precede each symbol with the file it came from. 199 200.. option:: --print-size, -S 201 202 Show symbol size as well as address (not applicable for Mach-O). 203 204.. option:: --quiet 205 206 Suppress 'no symbols' diagnostic. 207 208.. option:: --radix=<RADIX>, -t 209 210 Specify the radix of the symbol address(es). Values accepted are *d* (decimal), 211 *x* (hexadecimal) and *o* (octal). 212 213.. option:: --reverse-sort, -r 214 215 Sort symbols in reverse order. 216 217.. option:: --size-sort 218 219 Sort symbols by size. 220 221.. option:: --special-syms 222 223 Do not filter special symbols from the output. 224 225.. option:: --undefined-only, -u 226 227 Print only undefined symbols. 228 229.. option:: --version, -V 230 231 Display the version of the :program:`llvm-nm` executable, then exit. Does not 232 stack with other commands. 233 234.. option:: @<FILE> 235 236 Read command-line options from response file `<FILE>`. 237 238MACH-O SPECIFIC OPTIONS 239----------------------- 240 241.. option:: --add-dyldinfo 242 243 Add symbols from the dyldinfo, if they are not already in the symbol table. 244 This is the default. 245 246.. option:: --add-inlinedinfo 247 248 Add symbols from the inlined libraries, TBD file inputs only. 249 250.. option:: --arch=<arch1[,arch2,...]> 251 252 Dump the symbols from the specified architecture(s). 253 254.. option:: --dyldinfo-only 255 256 Dump only symbols from the dyldinfo. 257 258.. option:: --no-dyldinfo 259 260 Do not add any symbols from the dyldinfo. 261 262.. option:: -s <segment> <section> 263 264 Dump only symbols from this segment and section name. 265 266.. option:: -x 267 268 Print symbol entry in hex. 269 270BUGS 271---- 272 273 * :program:`llvm-nm` does not support the full set of arguments that GNU 274 :program:`nm` does. 275 276EXIT STATUS 277----------- 278 279:program:`llvm-nm` exits with an exit code of zero. 280 281SEE ALSO 282-------- 283 284:manpage:`llvm-ar(1)`, :manpage:`llvm-objdump(1)`, :manpage:`llvm-readelf(1)`, 285:manpage:`llvm-readobj(1)` 286