1 llvm-nm - list LLVM bitcode and object file's symbol table 2 ========================================================== 3 4 SYNOPSIS 5 -------- 6 7 :program:`llvm-nm` [*options*] [*filenames...*] 8 9 DESCRIPTION 10 ----------- 11 12 The :program:`llvm-nm` utility lists the names of symbols from the LLVM bitcode 13 files, object files, or :program:`ar` archives containing them, named on the 14 command line. Each symbol is listed along with some simple information about 15 its provenance. If no file name is specified, or *-* is used as a file name, 16 :program:`llvm-nm` will process a file on its standard input stream. 17 18 :program:`llvm-nm`'s default output format is the traditional BSD :program:`nm` 19 output format. Each such output record consists of an (optional) 8-digit 20 hexadecimal address, followed by a type code character, followed by a name, for 21 each symbol. One record is printed per line; fields are separated by spaces. 22 When the address is omitted, it is replaced by 8 spaces. 23 24 Type code characters currently supported, and their meanings, are as follows: 25 26 U 27 28 Named object is referenced but undefined in this bitcode file 29 30 C 31 32 Common (multiple definitions link together into one def) 33 34 W 35 36 Weak reference (multiple definitions link together into zero or one definitions) 37 38 t 39 40 Local function (text) object 41 42 T 43 44 Global function (text) object 45 46 d 47 48 Local data object 49 50 D 51 52 Global data object 53 54 ? 55 56 Something unrecognizable 57 58 Because LLVM bitcode files typically contain objects that are not considered to 59 have addresses until they are linked into an executable image or dynamically 60 compiled "just-in-time", :program:`llvm-nm` does not print an address for any 61 symbol in an LLVM bitcode file, even symbols which are defined in the bitcode 62 file. 63 64 OPTIONS 65 ------- 66 67 .. program:: llvm-nm 68 69 .. option:: -B (default) 70 71 Use BSD output format. Alias for :option:`--format=bsd`. 72 73 .. option:: -P 74 75 Use POSIX.2 output format. Alias for :option:`--format=posix`. 76 77 .. option:: --debug-syms, -a 78 79 Show all symbols, even debugger only. 80 81 .. option:: --defined-only 82 83 Print only symbols defined in this file (as opposed to 84 symbols which may be referenced by objects in this file, but not 85 defined in this file.) 86 87 .. option:: --dynamic, -D 88 89 Display dynamic symbols instead of normal symbols. 90 91 .. option:: --extern-only, -g 92 93 Print only symbols whose definitions are external; that is, accessible 94 from other files. 95 96 .. option:: --format=format, -f format 97 98 Select an output format; *format* may be *sysv*, *posix*, or *bsd*. The default 99 is *bsd*. 100 101 .. option:: -help 102 103 Print a summary of command-line options and their meanings. 104 105 .. option:: --no-sort, -p 106 107 Shows symbols in order encountered. 108 109 .. option:: --numeric-sort, -n, -v 110 111 Sort symbols by address. 112 113 .. option:: --print-file-name, -A, -o 114 115 Precede each symbol with the file it came from. 116 117 .. option:: --print-size, -S 118 119 Show symbol size instead of address. 120 121 .. option:: --size-sort 122 123 Sort symbols by size. 124 125 .. option:: --undefined-only, -u 126 127 Print only symbols referenced but not defined in this file. 128 129 .. option:: --radix=RADIX, -t 130 131 Specify the radix of the symbol address(es). Values accepted d(decimal), 132 x(hexadecomal) and o(octal). 133 134 BUGS 135 ---- 136 137 * :program:`llvm-nm` cannot demangle C++ mangled names, like GNU :program:`nm` 138 can. 139 140 * :program:`llvm-nm` does not support the full set of arguments that GNU 141 :program:`nm` does. 142 143 EXIT STATUS 144 ----------- 145 146 :program:`llvm-nm` exits with an exit code of zero. 147 148 SEE ALSO 149 -------- 150 151 llvm-dis, ar(1), nm(1) 152
