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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>function::registers_valid</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1"><link rel="start" href="index.html" title="SystemTap Tapset Reference Manual"><link rel="up" href="ch02.html" title="Chapter 2. Context Functions"><link rel="prev" href="re43.html" title="function::register"><link rel="next" href="re45.html" title="function::regparm"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>function::registers_valid</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re43.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Context Functions</th><td width="20%" align="right"> <a accesskey="n" href="re45.html">Next</a></td></tr></table><hr></div><div class="refentry" lang="en"><a name="API-registers-valid"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>function::registers_valid —
Determines validity of <code class="function">register</code> and <code class="function">u_register</code> in current context
</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting">
registers_valid:long()
</pre></div><div class="refsect1" lang="en"><a name="idp5135008"></a><h2>Arguments</h2><p>
None
</p></div><div class="refsect1" lang="en"><a name="idp5136224"></a><h2>Description</h2><p>
This function returns 1 if <code class="function">register</code> and <code class="function">u_register</code>
can be used in the current context, or 0 otherwise.
For example, <code class="function">registers_valid</code> returns 0
when called from a begin or end probe.
</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re43.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re45.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>function::register</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>function::regparm</span></td></tr></table></div></body></html>