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, -U 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*, or *bsd*. 153 The default is *bsd*. 154 155.. option:: --help, -h 156 157 Print a summary of command-line options and their meanings. 158 159.. option:: --help-list 160 161 Print an uncategorized summary of command-line options and their meanings. 162 163.. option:: --just-symbol-name, -j 164 165 Print just the symbol names. 166 167.. option:: -m 168 169 Use Darwin format. Alias for ``--format=darwin``. 170 171.. option:: --no-demangle 172 173 Don't demangle symbol names. This is the default. 174 175.. option:: --no-llvm-bc 176 177 Disable the LLVM bitcode reader. 178 179.. option:: --no-sort, -p 180 181 Show symbols in the order encountered. 182 183.. option:: --no-weak, -W 184 185 Don't print weak symbols. 186 187.. option:: --numeric-sort, -n, -v 188 189 Sort symbols by address. 190 191.. option:: --portability, -P 192 193 Use POSIX.2 output format. Alias for ``--format=posix``. 194 195.. option:: --print-armap, -M 196 197 Print the archive symbol table, in addition to the symbols. 198 199.. option:: --print-file-name, -A, -o 200 201 Precede each symbol with the file it came from. 202 203.. option:: --print-size, -S 204 205 Show symbol size as well as address (not applicable for Mach-O). 206 207.. option:: --radix=<RADIX>, -t 208 209 Specify the radix of the symbol address(es). Values accepted are *d* (decimal), 210 *x* (hexadecimal) and *o* (octal). 211 212.. option:: --reverse-sort, -r 213 214 Sort symbols in reverse order. 215 216.. option:: --size-sort 217 218 Sort symbols by size. 219 220.. option:: --special-syms 221 222 Ignored. For GNU compatibility only. 223 224.. option:: --undefined-only, -u 225 226 Print only undefined symbols. 227 228.. option:: --version 229 230 Display the version of the :program:`llvm-nm` executable. Does not stack with 231 other commands. 232 233.. option:: --without-aliases 234 235 Exclude aliases from the output. 236 237.. option:: @<FILE> 238 239 Read command-line options from response file `<FILE>`. 240 241MACH-O SPECIFIC OPTIONS 242----------------------- 243 244.. option:: --add-dyldinfo 245 246 Add symbols from the dyldinfo, if they are not already in the symbol table. 247 This is the default. 248 249.. option:: --arch=<arch1[,arch2,...]> 250 251 Dump the symbols from the specified architecture(s). 252 253.. option:: --dyldinfo-only 254 255 Dump only symbols from the dyldinfo. 256 257.. option:: --no-dyldinfo 258 259 Do not add any symbols from the dyldinfo. 260 261.. option:: -s=<segment section> 262 263 Dump only symbols from this segment and section name. 264 265.. option:: -x 266 267 Print symbol entry in hex. 268 269BUGS 270---- 271 272 * :program:`llvm-nm` does not support the full set of arguments that GNU 273 :program:`nm` does. 274 275EXIT STATUS 276----------- 277 278:program:`llvm-nm` exits with an exit code of zero. 279 280SEE ALSO 281-------- 282 283:manpage:`llvm-ar(1)`, :manpage:`llvm-objdump(1)`, :manpage:`llvm-readelf(1)`, 284:manpage:`llvm-readobj(1)` 285