64 lines
2.9 KiB
HTML
64 lines
2.9 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>Entry Point - Untitled</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Untitled">
|
|
<meta name="generator" content="makeinfo 4.7">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Simple-Commands.html#Simple-Commands" title="Simple Commands">
|
|
<link rel="next" href="File-Commands.html#File-Commands" title="File Commands">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the GNU linker LD
|
|
(GNU Binutils)
|
|
version 2.19.
|
|
|
|
Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000,
|
|
2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.1
|
|
or any later version published by the Free Software Foundation;
|
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
|
Back-Cover Texts. A copy of the license is included in the
|
|
section entitled ``GNU Free Documentation License''.-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family: serif; font-weight: normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<p>
|
|
<a name="Entry-Point"></a>Next: <a rel="next" accesskey="n" href="File-Commands.html#File-Commands">File Commands</a>,
|
|
Up: <a rel="up" accesskey="u" href="Simple-Commands.html#Simple-Commands">Simple Commands</a>
|
|
<hr><br>
|
|
</div>
|
|
|
|
<h4 class="subsection">3.4.1 Setting the Entry Point</h4>
|
|
|
|
<p><a name="index-ENTRY_0028_0040var_007bsymbol_007d_0029-315"></a><a name="index-start-of-execution-316"></a><a name="index-first-instruction-317"></a><a name="index-entry-point-318"></a>The first instruction to execute in a program is called the <dfn>entry
|
|
point</dfn>. You can use the <code>ENTRY</code> linker script command to set the
|
|
entry point. The argument is a symbol name:
|
|
<pre class="smallexample"> ENTRY(<var>symbol</var>)
|
|
</pre>
|
|
<p>There are several ways to set the entry point. The linker will set the
|
|
entry point by trying each of the following methods in order, and
|
|
stopping when one of them succeeds:
|
|
<ul>
|
|
<li>the <span class="samp">-e</span> <var>entry</var> command-line option;
|
|
<li>the <code>ENTRY(</code><var>symbol</var><code>)</code> command in a linker script;
|
|
<li>the value of the symbol <code>start</code>, if defined;
|
|
<li>the address of the first byte of the <span class="samp">.text</span> section, if present;
|
|
<li>The address <code>0</code>.
|
|
</ul>
|
|
|
|
</body></html>
|
|
|