<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>function::regparm</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="SystemTap Tapset Reference Manual"><link rel="up" href="context_stp.html" title="Chapter 2. Context Functions"><link rel="prev" href="API-registers-valid.html" title="function::registers_valid"><link rel="next" href="API-remote-id.html" title="function::remote_id"></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::regparm</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-registers-valid.html">Prev</a> </td><th width="60%" align="center">Chapter 2. Context Functions</th><td width="20%" align="right"> <a accesskey="n" href="API-remote-id.html">Next</a></td></tr></table><hr></div><div class="refentry" title="function::regparm"><a name="API-regparm"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>function::regparm —
Specify regparm value used to compile function
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="programlisting">
regparm(n:long)
</pre></div><div class="refsect1" title="Arguments"><a name="idp3040544"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>n</code></em></span></dt><dd><p>
original regparm value
</p></dd></dl></div></div><div class="refsect1" title="Description"><a name="idp3042112"></a><h2>Description</h2><p>
Call this function with argument n before accessing function
arguments using the *_arg function is the function was build with the
gcc -mregparm=n option.
</p><p>
(The i386 kernel is built with \-mregparm=3, so systemtap considers
regparm(3) the default for kernel functions on that architecture.)
Only valid on i386 and x86_64 (when probing 32bit applications).
Produces an error on other architectures.
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