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<div class="section" id="llvm-nm-list-llvm-bitcode-and-object-file-s-symbol-table">
<h1>llvm-nm - list LLVM bitcode and object file’s symbol table<a class="headerlink" href="#llvm-nm-list-llvm-bitcode-and-object-file-s-symbol-table" title="Permalink to this headline">¶</a></h1>
<div class="section" id="synopsis">
<h2>SYNOPSIS<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
<p><strong class="program">llvm-nm</strong> [<em>options</em>] [<em>filenames…</em>]</p>
</div>
<div class="section" id="description">
<h2>DESCRIPTION<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
<p>The <strong class="program">llvm-nm</strong> utility lists the names of symbols from LLVM bitcode
files, object files, and archives. Each symbol is listed along with some simple
information about its provenance. If no filename is specified, <em>a.out</em> is used
as the input. If <em>-</em> is used as a filename, <strong class="program">llvm-nm</strong> will read a file
from its standard input stream.</p>
<p><strong class="program">llvm-nm</strong>’s default output format is the traditional BSD <strong class="program">nm</strong>
output format. Each such output record consists of an (optional) 8-digit
hexadecimal address, followed by a type code character, followed by a name, for
each symbol. One record is printed per line; fields are separated by spaces.
When the address is omitted, it is replaced by 8 spaces.</p>
<p>The supported type code characters are as follows. Where both lower and
upper-case characters are listed for the same meaning, a lower-case character
represents a local symbol, whilst an upper-case character represents a global
(external) symbol:</p>
<p>a, A</p>
<blockquote>
<div><p>Absolute symbol.</p>
</div></blockquote>
<p>b, B</p>
<blockquote>
<div><p>Uninitialized data (bss) object.</p>
</div></blockquote>
<p>C</p>
<blockquote>
<div><p>Common symbol. Multiple definitions link together into one definition.</p>
</div></blockquote>
<p>d, D</p>
<blockquote>
<div><p>Writable data object.</p>
</div></blockquote>
<p>i, I</p>
<blockquote>
<div><p>COFF: .idata symbol or symbol in a section with IMAGE_SCN_LNK_INFO set.</p>
</div></blockquote>
<p>n</p>
<blockquote>
<div><p>ELF: local symbol from non-alloc section.</p>
<p>COFF: debug symbol.</p>
</div></blockquote>
<p>N</p>
<blockquote>
<div><p>ELF: debug section symbol, or global symbol from non-alloc section.</p>
</div></blockquote>
<p>s, S</p>
<blockquote>
<div><p>COFF: section symbol.</p>
<p>Mach-O: absolute symbol or symbol from a section other than __TEXT_EXEC __text,
__TEXT __text, __DATA __data, or __DATA __bss.</p>
</div></blockquote>
<p>r, R</p>
<blockquote>
<div><p>Read-only data object.</p>
</div></blockquote>
<p>t, T</p>
<blockquote>
<div><p>Code (text) object.</p>
</div></blockquote>
<p>u</p>
<blockquote>
<div><p>ELF: GNU unique symbol.</p>
</div></blockquote>
<p>U</p>
<blockquote>
<div><p>Named object is undefined in this file.</p>
</div></blockquote>
<p>v</p>
<blockquote>
<div><p>ELF: Undefined weak object. It is not a link failure if the object is not
defined.</p>
</div></blockquote>
<p>V</p>
<blockquote>
<div><p>ELF: Defined weak object symbol. This definition will only be used if no
regular definitions exist in a link. If multiple weak definitions and no
regular definitions exist, one of the weak definitions will be used.</p>
</div></blockquote>
<p>w</p>
<blockquote>
<div><p>Undefined weak symbol other than an ELF object symbol. It is not a link failure
if the symbol is not defined.</p>
</div></blockquote>
<p>W</p>
<blockquote>
<div><p>Defined weak symbol other than an ELF object symbol. This definition will only
be used if no regular definitions exist in a link. If multiple weak definitions
and no regular definitions exist, one of the weak definitions will be used.</p>
</div></blockquote>
<p>-</p>
<blockquote>
<div><p>Mach-O: N_STAB symbol.</p>
</div></blockquote>
<p>?</p>
<blockquote>
<div><p>Something unrecognizable.</p>
</div></blockquote>
<p>Because LLVM bitcode files typically contain objects that are not considered to
have addresses until they are linked into an executable image or dynamically
compiled “just-in-time”, <strong class="program">llvm-nm</strong> does not print an address for any
symbol in an LLVM bitcode file, even symbols which are defined in the bitcode
file.</p>
</div>
<div class="section" id="options">
<h2>OPTIONS<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
<dl class="std option">
<dt id="cmdoption-llvm-nm-B">
<span id="cmdoption-llvm-nm-b"></span><code class="sig-name descname"><span class="pre">-B</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-B" title="Permalink to this definition">¶</a></dt>
<dd><p>Use BSD output format. Alias for <code class="docutils literal notranslate"><span class="pre">--format=bsd</span></code>.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-debug-syms">
<span id="cmdoption-llvm-nm-a"></span><code class="sig-name descname"><span class="pre">--debug-syms</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-a</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-debug-syms" title="Permalink to this definition">¶</a></dt>
<dd><p>Show all symbols, even those usually suppressed.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-defined-only">
<code class="sig-name descname"><span class="pre">--defined-only</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-defined-only" title="Permalink to this definition">¶</a></dt>
<dd><p>Print only symbols defined in this file.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-demangle">
<span id="cmdoption-llvm-nm-C"></span><span id="cmdoption-llvm-nm-c"></span><code class="sig-name descname"><span class="pre">--demangle</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-C</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-demangle" title="Permalink to this definition">¶</a></dt>
<dd><p>Demangle symbol names.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-dynamic">
<span id="cmdoption-llvm-nm-D"></span><span id="cmdoption-llvm-nm-d"></span><code class="sig-name descname"><span class="pre">--dynamic</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-D</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-dynamic" title="Permalink to this definition">¶</a></dt>
<dd><p>Display dynamic symbols instead of normal symbols.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-extern-only">
<span id="cmdoption-llvm-nm-g"></span><code class="sig-name descname"><span class="pre">--extern-only</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-g</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-extern-only" title="Permalink to this definition">¶</a></dt>
<dd><p>Print only symbols whose definitions are external; that is, accessible from
other files.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-format">
<span id="cmdoption-llvm-nm-f"></span><code class="sig-name descname"><span class="pre">--format</span></code><code class="sig-prename descclassname"><span class="pre">=<format></span></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-f</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-format" title="Permalink to this definition">¶</a></dt>
<dd><p>Select an output format; <em>format</em> may be <em>sysv</em>, <em>posix</em>, <em>darwin</em>, <em>bsd</em> or
<em>just-symbols</em>.
The default is <em>bsd</em>.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-help">
<span id="cmdoption-llvm-nm-h"></span><code class="sig-name descname"><span class="pre">--help</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-h</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-help" title="Permalink to this definition">¶</a></dt>
<dd><p>Print a summary of command-line options and their meanings.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-j">
<code class="sig-name descname"><span class="pre">-j</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-j" title="Permalink to this definition">¶</a></dt>
<dd><p>Print just the symbol names. Alias for <cite>–format=just-symbols`</cite>.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-m">
<code class="sig-name descname"><span class="pre">-m</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-m" title="Permalink to this definition">¶</a></dt>
<dd><p>Use Darwin format. Alias for <code class="docutils literal notranslate"><span class="pre">--format=darwin</span></code>.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-no-demangle">
<code class="sig-name descname"><span class="pre">--no-demangle</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-no-demangle" title="Permalink to this definition">¶</a></dt>
<dd><p>Don’t demangle symbol names. This is the default.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-no-llvm-bc">
<code class="sig-name descname"><span class="pre">--no-llvm-bc</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-no-llvm-bc" title="Permalink to this definition">¶</a></dt>
<dd><p>Disable the LLVM bitcode reader.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-no-sort">
<span id="cmdoption-llvm-nm-p"></span><code class="sig-name descname"><span class="pre">--no-sort</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-p</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-no-sort" title="Permalink to this definition">¶</a></dt>
<dd><p>Show symbols in the order encountered.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-no-weak">
<code class="sig-name descname"><span class="pre">--no-weak</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-no-weak" title="Permalink to this definition">¶</a></dt>
<dd><p>Don’t print weak symbols.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-numeric-sort">
<span id="cmdoption-llvm-nm-n"></span><span id="cmdoption-llvm-nm-v"></span><code class="sig-name descname"><span class="pre">--numeric-sort</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-n</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-v</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-numeric-sort" title="Permalink to this definition">¶</a></dt>
<dd><p>Sort symbols by address.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-portability">
<span id="cmdoption-llvm-nm-P"></span><code class="sig-name descname"><span class="pre">--portability</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-P</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-portability" title="Permalink to this definition">¶</a></dt>
<dd><p>Use POSIX.2 output format. Alias for <code class="docutils literal notranslate"><span class="pre">--format=posix</span></code>.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-print-armap">
<code class="sig-name descname"><span class="pre">--print-armap</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-print-armap" title="Permalink to this definition">¶</a></dt>
<dd><p>Print the archive symbol table, in addition to the symbols.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-print-file-name">
<span id="cmdoption-llvm-nm-A"></span><span id="cmdoption-llvm-nm-o"></span><code class="sig-name descname"><span class="pre">--print-file-name</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-A</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-o</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-print-file-name" title="Permalink to this definition">¶</a></dt>
<dd><p>Precede each symbol with the file it came from.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-print-size">
<span id="cmdoption-llvm-nm-S"></span><span id="cmdoption-llvm-nm-s"></span><code class="sig-name descname"><span class="pre">--print-size</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-S</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-print-size" title="Permalink to this definition">¶</a></dt>
<dd><p>Show symbol size as well as address (not applicable for Mach-O).</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-quiet">
<code class="sig-name descname"><span class="pre">--quiet</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-quiet" title="Permalink to this definition">¶</a></dt>
<dd><p>Suppress ‘no symbols’ diagnostic.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-radix">
<span id="cmdoption-llvm-nm-t"></span><code class="sig-name descname"><span class="pre">--radix</span></code><code class="sig-prename descclassname"><span class="pre">=<RADIX></span></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-t</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-radix" title="Permalink to this definition">¶</a></dt>
<dd><p>Specify the radix of the symbol address(es). Values accepted are <em>d</em> (decimal),
<em>x</em> (hexadecimal) and <em>o</em> (octal).</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-reverse-sort">
<span id="cmdoption-llvm-nm-r"></span><code class="sig-name descname"><span class="pre">--reverse-sort</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-r</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-reverse-sort" title="Permalink to this definition">¶</a></dt>
<dd><p>Sort symbols in reverse order.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-size-sort">
<code class="sig-name descname"><span class="pre">--size-sort</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-size-sort" title="Permalink to this definition">¶</a></dt>
<dd><p>Sort symbols by size.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-special-syms">
<code class="sig-name descname"><span class="pre">--special-syms</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-special-syms" title="Permalink to this definition">¶</a></dt>
<dd><p>Do not filter special symbols from the output.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-undefined-only">
<span id="cmdoption-llvm-nm-u"></span><code class="sig-name descname"><span class="pre">--undefined-only</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-u</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-undefined-only" title="Permalink to this definition">¶</a></dt>
<dd><p>Print only undefined symbols.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-version">
<span id="cmdoption-llvm-nm-V"></span><code class="sig-name descname"><span class="pre">--version</span></code><code class="sig-prename descclassname"></code><code class="sig-prename descclassname"><span class="pre">,</span> </code><code class="sig-name descname"><span class="pre">-V</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-version" title="Permalink to this definition">¶</a></dt>
<dd><p>Display the version of the <strong class="program">llvm-nm</strong> executable, then exit. Does not
stack with other commands.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-arg-FILE">
<span id="cmdoption-llvm-nm-arg-file"></span><code class="sig-name descname"><span class="pre">@<FILE></span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-arg-FILE" title="Permalink to this definition">¶</a></dt>
<dd><p>Read command-line options from response file <cite><FILE></cite>.</p>
</dd></dl>
</div>
<div class="section" id="mach-o-specific-options">
<h2>MACH-O SPECIFIC OPTIONS<a class="headerlink" href="#mach-o-specific-options" title="Permalink to this headline">¶</a></h2>
<dl class="std option">
<dt id="cmdoption-llvm-nm-add-dyldinfo">
<code class="sig-name descname"><span class="pre">--add-dyldinfo</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-add-dyldinfo" title="Permalink to this definition">¶</a></dt>
<dd><p>Add symbols from the dyldinfo, if they are not already in the symbol table.
This is the default.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-add-inlinedinfo">
<code class="sig-name descname"><span class="pre">--add-inlinedinfo</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-add-inlinedinfo" title="Permalink to this definition">¶</a></dt>
<dd><p>Add symbols from the inlined libraries, TBD file inputs only.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-arch">
<code class="sig-name descname"><span class="pre">--arch</span></code><code class="sig-prename descclassname"><span class="pre">=<arch1[,arch2,...]></span></code><a class="headerlink" href="#cmdoption-llvm-nm-arch" title="Permalink to this definition">¶</a></dt>
<dd><p>Dump the symbols from the specified architecture(s).</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-dyldinfo-only">
<code class="sig-name descname"><span class="pre">--dyldinfo-only</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-dyldinfo-only" title="Permalink to this definition">¶</a></dt>
<dd><p>Dump only symbols from the dyldinfo.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-no-dyldinfo">
<code class="sig-name descname"><span class="pre">--no-dyldinfo</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-no-dyldinfo" title="Permalink to this definition">¶</a></dt>
<dd><p>Do not add any symbols from the dyldinfo.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-0">
<code class="sig-name descname"><span class="pre">-s</span></code><code class="sig-prename descclassname"> <span class="pre"><segment></span> <span class="pre"><section></span></code><a class="headerlink" href="#cmdoption-llvm-nm-0" title="Permalink to this definition">¶</a></dt>
<dd><p>Dump only symbols from this segment and section name.</p>
</dd></dl>
<dl class="std option">
<dt id="cmdoption-llvm-nm-x">
<code class="sig-name descname"><span class="pre">-x</span></code><code class="sig-prename descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-x" title="Permalink to this definition">¶</a></dt>
<dd><p>Print symbol entry in hex.</p>
</dd></dl>
</div>
<div class="section" id="bugs">
<h2>BUGS<a class="headerlink" href="#bugs" title="Permalink to this headline">¶</a></h2>
<blockquote>
<div><ul class="simple">
<li><p><strong class="program">llvm-nm</strong> does not support the full set of arguments that GNU
<strong class="program">nm</strong> does.</p></li>
</ul>
</div></blockquote>
</div>
<div class="section" id="exit-status">
<h2>EXIT STATUS<a class="headerlink" href="#exit-status" title="Permalink to this headline">¶</a></h2>
<p><strong class="program">llvm-nm</strong> exits with an exit code of zero.</p>
</div>
<div class="section" id="see-also">
<h2>SEE ALSO<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
<p><em class="manpage"><a class="manpage reference external" href="https://llvm.org/docs/CommandGuide/llvm-ar.html">llvm-ar(1)</a></em>, <em class="manpage"><a class="manpage reference external" href="https://llvm.org/docs/CommandGuide/llvm-objdump.html">llvm-objdump(1)</a></em>, <em class="manpage"><a class="manpage reference external" href="https://llvm.org/docs/CommandGuide/llvm-readelf.html">llvm-readelf(1)</a></em>,
<em class="manpage"><a class="manpage reference external" href="https://llvm.org/docs/CommandGuide/llvm-readobj.html">llvm-readobj(1)</a></em></p>
</div>
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