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, -U
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, or
125 bsd. The default is bsd.
126 --help, -h
128 Print a summary of command-line options and their meanings.
129 --help-list
131 Print an uncategorized summary of command-line options and their
132 meanings.
133 --just-symbol-name, -j
135 Print just the symbol names.
136 -m Use Darwin format. Alias for --format=darwin.
138 --no-demangle
140 Don't demangle symbol names. This is the default.
141 --no-llvm-bc
143 Disable the LLVM bitcode reader.
144 --no-sort, -p
146 Show symbols in the order encountered.
147 --no-weak, -W
149 Don't print weak symbols.
150 --numeric-sort, -n, -v
152 Sort symbols by address.
153 --portability, -P
155 Use POSIX.2 output format. Alias for --format=posix.
156 --print-armap, -M
158 Print the archive symbol table, in addition to the symbols.
159 --print-file-name, -A, -o
161 Precede each symbol with the file it came from.
162 --print-size, -S
164 Show symbol size as well as address (not applicable for Mach-O).
165 --radix=<RADIX>, -t
167 Specify the radix of the symbol address(es). Values accepted are
168 d (decimal), x (hexadecimal) and o (octal).
169 --reverse-sort, -r
171 Sort symbols in reverse order.
172 --size-sort
174 Sort symbols by size.
175 --special-syms
177 Do not filter special symbols from the output.
178 --undefined-only, -u
180 Print only undefined symbols.
181 --version
183 Display the version of the llvm-nm executable. Does not stack
184 with other commands.
185 --without-aliases
187 Exclude aliases from the output.
188 @<FILE>
190 Read command-line options from response file <FILE>.
191
193 --add-dyldinfo
194 Add symbols from the dyldinfo, if they are not already in the
195 symbol table. This is the default.
196 --add-inlinedinfo
198 Add symbols from the inlined libraries, TBD file inputs only.
199 --arch=<arch1[,arch2,...]>
201 Dump the symbols from the specified architecture(s).
202 --dyldinfo-only
204 Dump only symbols from the dyldinfo.
205 --no-dyldinfo
207 Do not add any symbols from the dyldinfo.
208 -s=<segment section>
210 Dump only symbols from this segment and section name.
211 -x Print symbol entry in hex.
213
215 • llvm-nm does not support the full set of arguments that GNU nm
216 does.
217
219 llvm-nm exits with an exit code of zero.
220
222 llvm-ar(1), llvm-objdump(1), llvm-readelf(1), llvm-readobj(1)
223
225 Maintained by the LLVM Team (https://llvm.org/).
226
228 2003-2023, LLVM Project
22911 2023-07-20 LLVM-NM(1)