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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 the LLVM bitcode
files, object files, or <strong class="program">ar</strong> archives containing them, named on the
command line. Each symbol is listed along with some simple information about
its provenance. If no file name is specified, or <em>-</em> is used as a file name,
<strong class="program">llvm-nm</strong> will process a file on 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>Type code characters currently supported, and their meanings, are as follows:</p>
<p>U</p>
<blockquote>
<div>Named object is referenced but undefined in this bitcode file</div></blockquote>
<p>C</p>
<blockquote>
<div>Common (multiple definitions link together into one def)</div></blockquote>
<p>W</p>
<blockquote>
<div>Weak reference (multiple definitions link together into zero or one definitions)</div></blockquote>
<p>t</p>
<blockquote>
<div>Local function (text) object</div></blockquote>
<p>T</p>
<blockquote>
<div>Global function (text) object</div></blockquote>
<p>d</p>
<blockquote>
<div>Local data object</div></blockquote>
<p>D</p>
<blockquote>
<div>Global data object</div></blockquote>
<p>?</p>
<blockquote>
<div>Something unrecognizable</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="option">
<dt id="cmdoption-llvm-nm-b">
<code class="descname">-B</code><code class="descclassname"> (default)</code><a class="headerlink" href="#cmdoption-llvm-nm-b" title="Permalink to this definition">¶</a></dt>
<dd><p>Use BSD output format. Alias for <cite>–format=bsd</cite>.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-p">
<code class="descname">-P</code><code class="descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-p" title="Permalink to this definition">¶</a></dt>
<dd><p>Use POSIX.2 output format. Alias for <cite>–format=posix</cite>.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-debug-syms">
<code class="descname">--debug-syms</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-a</code><code class="descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-debug-syms" title="Permalink to this definition">¶</a></dt>
<dd><p>Show all symbols, even debugger only.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-defined-only">
<code class="descname">--defined-only</code><code class="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 (as opposed to
symbols which may be referenced by objects in this file, but not
defined in this file.)</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-dynamic">
<code class="descname">--dynamic</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-D</code><code class="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="option">
<dt id="cmdoption-llvm-nm-extern-only">
<code class="descname">--extern-only</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-g</code><code class="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="option">
<dt id="cmdoption-llvm-nm-no-weak">
<code class="descname">--no-weak</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-W</code><code class="descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-no-weak" title="Permalink to this definition">¶</a></dt>
<dd><p>Don’t print any weak symbols in the output.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-format">
<code class="descname">--format</code><code class="descclassname">=format</code><code class="descclassname">, </code><code class="descname">-f</code><code class="descclassname"> format</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>, or <em>bsd</em>. The default
is <em>bsd</em>.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-help">
<code class="descname">-help</code><code class="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="option">
<dt id="cmdoption-llvm-nm-no-sort">
<code class="descname">--no-sort</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-p</code><code class="descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-no-sort" title="Permalink to this definition">¶</a></dt>
<dd><p>Shows symbols in order encountered.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-numeric-sort">
<code class="descname">--numeric-sort</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-n</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-v</code><code class="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="option">
<dt id="cmdoption-llvm-nm-print-file-name">
<code class="descname">--print-file-name</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-A</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-o</code><code class="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="option">
<dt id="cmdoption-llvm-nm-print-size">
<code class="descname">--print-size</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-S</code><code class="descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-print-size" title="Permalink to this definition">¶</a></dt>
<dd><p>Show symbol size instead of address.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-size-sort">
<code class="descname">--size-sort</code><code class="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="option">
<dt id="cmdoption-llvm-nm-undefined-only">
<code class="descname">--undefined-only</code><code class="descclassname"></code><code class="descclassname">, </code><code class="descname">-u</code><code class="descclassname"></code><a class="headerlink" href="#cmdoption-llvm-nm-undefined-only" title="Permalink to this definition">¶</a></dt>
<dd><p>Print only symbols referenced but not defined in this file.</p>
</dd></dl>
<dl class="option">
<dt id="cmdoption-llvm-nm-radix">
<code class="descname">--radix</code><code class="descclassname">=RADIX</code><code class="descclassname">, </code><code class="descname">-t</code><code class="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 d(decimal),
x(hexadecomal) and o(octal).</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><strong class="program">llvm-nm</strong> does not support the full set of arguments that GNU
<strong class="program">nm</strong> does.</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>llvm-dis, ar(1), nm(1)</p>
</div>
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