1LLVM-NM(1) LLVM LLVM-NM(1)
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6 llvm-nm - list LLVM bitcode and object file's symbol table
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9 llvm-nm [options] [filenames...]
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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 -X Specify the type of XCOFF object file, ELF object file, or IR
108 object file input from command line or from archive files that
109 llvm-nm should examine. The mode must be one of the following:
110 32 Process only 32-bit object files.
112 64 Process only 64-bit object files.
114 32_64 Process both 32-bit and 64-bit object files.
116 any Process all the supported object files.
118 On AIX OS, the default is to process 32-bit object files only
120 and to ignore 64-bit objects. The can be changed by setting
121 the OBJECT_MODE environment variable. For example, OB‐
122 JECT_MODE=64 causes llvm-nm to process 64-bit objects and ig‐
123 nore 32-bit objects. The -X flag overrides the OBJECT_MODE
124 variable.
125 On other operating systems, the default is to process all ob‐
127 ject files: the OBJECT_MODE environment variable is not sup‐
128 ported.
129 --debug-syms, -a
131 Show all symbols, even those usually suppressed.
132 --defined-only, -U
134 Print only symbols defined in this file.
135 --demangle, -C
137 Demangle symbol names.
138 --dynamic, -D
140 Display dynamic symbols instead of normal symbols.
141 --export-symbols
143 Print sorted symbols with their visibility (if applicable), with
144 duplicates removed.
145 --extern-only, -g
147 Print only symbols whose definitions are external; that is, ac‐
148 cessible from other files.
149 --format=<format>, -f
151 Select an output format; format may be sysv, posix, darwin, bsd
152 or just-symbols. The default is bsd.
153 --help, -h
155 Print a summary of command-line options and their meanings.
156 -j Print just the symbol names. Alias for --format=just-symbols`.
158 -m Use Darwin format. Alias for --format=darwin.
160 --no-demangle
162 Don't demangle symbol names. This is the default.
163 --no-llvm-bc
165 Disable the LLVM bitcode reader.
166 --no-sort, -p
168 Show symbols in the order encountered.
169 --no-weak, -W
171 Don't print weak symbols.
172 --numeric-sort, -n, -v
174 Sort symbols by address.
175 --portability, -P
177 Use POSIX.2 output format. Alias for --format=posix.
178 --print-armap
180 Print the archive symbol table, in addition to the symbols.
181 --print-file-name, -A, -o
183 Precede each symbol with the file it came from.
184 --print-size, -S
186 Show symbol size as well as address (not applicable for Mach-O).
187 --quiet
189 Suppress 'no symbols' diagnostic.
190 --radix=<RADIX>, -t
192 Specify the radix of the symbol address(es). Values accepted are
193 d (decimal), x (hexadecimal) and o (octal).
194 --reverse-sort, -r
196 Sort symbols in reverse order.
197 --size-sort
199 Sort symbols by size.
200 --special-syms
202 Do not filter special symbols from the output.
203 --undefined-only, -u
205 Print only undefined symbols.
206 --version, -V
208 Display the version of the llvm-nm executable, then exit. Does
209 not stack with other commands.
210 @<FILE>
212 Read command-line options from response file <FILE>.
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215 --add-dyldinfo
216 Add symbols from the dyldinfo, if they are not already in the
217 symbol table. This is the default.
218 --add-inlinedinfo
220 Add symbols from the inlined libraries, TBD file inputs only.
221 --arch=<arch1[,arch2,...]>
223 Dump the symbols from the specified architecture(s).
224 --dyldinfo-only
226 Dump only symbols from the dyldinfo.
227 --no-dyldinfo
229 Do not add any symbols from the dyldinfo.
230 -s <segment> <section>
232 Dump only symbols from this segment and section name.
233 -x Print symbol entry in hex.
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237 --no-rsrc
238 Exclude resource file symbols (__rsrc) from export symbol list.
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241 • llvm-nm does not support the full set of arguments that GNU nm
242 does.
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245 llvm-nm exits with an exit code of zero.
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248 llvm-ar(1), llvm-objdump(1), llvm-readelf(1), llvm-readobj(1)
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251 Maintained by the LLVM Team (https://llvm.org/).
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254 2003-2023, LLVM Project
25516 2023-07-20 LLVM-NM(1)