1LLVM-NM(1) LLVM LLVM-NM(1)
2
6 llvm-nm - list LLVM bitcode and object file's symbol table
7
9 llvm-nm [options] [filenames...]
10
12 The llvm-nm utility lists the names of symbols from LLVM bitcode files,
13 object files, and archives. Each symbol is listed along with some sim‐
14 ple information about its provenance. If no filename is specified,
15 a.out is used as the input. If - is used as a filename, llvm-nm will
16 read a file from its standard input stream.
17 llvm-nm's default output format is the traditional BSD nm output for‐
19 mat. Each such output record consists of an (optional) 8-digit hexadec‐
20 imal address, followed by a type code character, followed by a name,
21 for each symbol. One record is printed per line; fields are separated
22 by spaces. When the address is omitted, it is replaced by 8 spaces.
23 The supported type code characters are as follows. Where both lower and
25 upper-case characters are listed for the same meaning, a lower-case
26 character represents a local symbol, whilst an upper-case character
27 represents a global (external) symbol:
28 a, A
30 Absolute symbol.
31 b, B
33 Uninitialized data (bss) object.
34 C
36 Common symbol. Multiple definitions link together into one defini‐
37 tion.
38 d, D
40 Writable data object.
41 i, I
43 COFF: .idata symbol or symbol in a section with IMAGE_SCN_LNK_INFO
44 set.
45 n
47 ELF: local symbol from non-alloc section.
48 COFF: debug symbol.
50 N
52 ELF: debug section symbol, or global symbol from non-alloc section.
53 s, S
55 COFF: section symbol.
56 Mach-O: absolute symbol or symbol from a section other than
58 __TEXT_EXEC __text, __TEXT __text, __DATA __data, or __DATA __bss.
59 r, R
61 Read-only data object.
62 t, T
64 Code (text) object.
65 u
67 ELF: GNU unique symbol.
68 U
70 Named object is undefined in this file.
71 v
73 ELF: Undefined weak object. It is not a link failure if the object
74 is not defined.
75 V
77 ELF: Defined weak object symbol. This definition will only be used
78 if no regular definitions exist in a link. If multiple weak defini‐
79 tions and no regular definitions exist, one of the weak definitions
80 will be used.
81 w
83 Undefined weak symbol other than an ELF object symbol. It is not a
84 link failure if the symbol is not defined.
85 W
87 Defined weak symbol other than an ELF object symbol. This definition
88 will only be used if no regular definitions exist in a link. If mul‐
89 tiple weak definitions and no regular definitions exist, one of the
90 weak definitions will be used.
91 -
93 Mach-O: N_STAB symbol.
94 ?
96 Something unrecognizable.
97 Because LLVM bitcode files typically contain objects that are not con‐
99 sidered to have addresses until they are linked into an executable im‐
100 age or dynamically compiled "just-in-time", llvm-nm does not print an
101 address for any symbol in an LLVM bitcode file, even symbols which are
102 defined in the bitcode file.
103
105 -B Use BSD output format. Alias for --format=bsd.
106 --debug-syms, -a
108 Show all symbols, even those usually suppressed.
109 --defined-only
111 Print only symbols defined in this file.
112 --demangle, -C
114 Demangle symbol names.
115 --dynamic, -D
117 Display dynamic symbols instead of normal symbols.
118 --extern-only, -g
120 Print only symbols whose definitions are external; that is, ac‐
121 cessible from other files.
122 --format=<format>, -f
124 Select an output format; format may be sysv, posix, darwin, bsd
125 or just-symbols. The default is bsd.
126 --help, -h
128 Print a summary of command-line options and their meanings.
129 -j Print just the symbol names. Alias for --format=just-symbols`.
131 -m Use Darwin format. Alias for --format=darwin.
133 --no-demangle
135 Don't demangle symbol names. This is the default.
136 --no-llvm-bc
138 Disable the LLVM bitcode reader.
139 --no-sort, -p
141 Show symbols in the order encountered.
142 --no-weak
144 Don't print weak symbols.
145 --numeric-sort, -n, -v
147 Sort symbols by address.
148 --portability, -P
150 Use POSIX.2 output format. Alias for --format=posix.
151 --print-armap
153 Print the archive symbol table, in addition to the symbols.
154 --print-file-name, -A, -o
156 Precede each symbol with the file it came from.
157 --print-size, -S
159 Show symbol size as well as address (not applicable for Mach-O).
160 --quiet
162 Suppress 'no symbols' diagnostic.
163 --radix=<RADIX>, -t
165 Specify the radix of the symbol address(es). Values accepted are
166 d (decimal), x (hexadecimal) and o (octal).
167 --reverse-sort, -r
169 Sort symbols in reverse order.
170 --size-sort
172 Sort symbols by size.
173 --special-syms
175 Do not filter special symbols from the output.
176 --undefined-only, -u
178 Print only undefined symbols.
179 --version, -V
181 Display the version of the llvm-nm executable, then exit. Does
182 not stack with other commands.
183 @<FILE>
185 Read command-line options from response file <FILE>.
186
188 --add-dyldinfo
189 Add symbols from the dyldinfo, if they are not already in the
190 symbol table. This is the default.
191 --add-inlinedinfo
193 Add symbols from the inlined libraries, TBD file inputs only.
194 --arch=<arch1[,arch2,...]>
196 Dump the symbols from the specified architecture(s).
197 --dyldinfo-only
199 Dump only symbols from the dyldinfo.
200 --no-dyldinfo
202 Do not add any symbols from the dyldinfo.
203 -s <segment> <section>
205 Dump only symbols from this segment and section name.
206 -x Print symbol entry in hex.
208
210 • llvm-nm does not support the full set of arguments that GNU nm
211 does.
212
214 llvm-nm exits with an exit code of zero.
215
217 llvm-ar(1), llvm-objdump(1), llvm-readelf(1), llvm-readobj(1)
218
220 Maintained by the LLVM Team (https://llvm.org/).
221
223 2003-2023, LLVM Project
22414 2023-07-20 LLVM-NM(1)