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| <a name="Scripts"></a> |
| <div class="header"> |
| <p> |
| Next: <a href="Machine-Dependent.html#Machine-Dependent" accesskey="n" rel="next">Machine Dependent</a>, Previous: <a href="Invocation.html#Invocation" accesskey="p" rel="prev">Invocation</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="LD-Index.html#LD-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Linker-Scripts"></a> |
| <h2 class="chapter">3 Linker Scripts</h2> |
| |
| <a name="index-scripts"></a> |
| <a name="index-linker-scripts"></a> |
| <a name="index-command-files"></a> |
| <p>Every link is controlled by a <em>linker script</em>. This script is |
| written in the linker command language. |
| </p> |
| <p>The main purpose of the linker script is to describe how the sections in |
| the input files should be mapped into the output file, and to control |
| the memory layout of the output file. Most linker scripts do nothing |
| more than this. However, when necessary, the linker script can also |
| direct the linker to perform many other operations, using the commands |
| described below. |
| </p> |
| <p>The linker always uses a linker script. If you do not supply one |
| yourself, the linker will use a default script that is compiled into the |
| linker executable. You can use the ‘<samp>--verbose</samp>’ command line option |
| to display the default linker script. Certain command line options, |
| such as ‘<samp>-r</samp>’ or ‘<samp>-N</samp>’, will affect the default linker script. |
| </p> |
| <p>You may supply your own linker script by using the ‘<samp>-T</samp>’ command |
| line option. When you do this, your linker script will replace the |
| default linker script. |
| </p> |
| <p>You may also use linker scripts implicitly by naming them as input files |
| to the linker, as though they were files to be linked. See <a href="Implicit-Linker-Scripts.html#Implicit-Linker-Scripts">Implicit Linker Scripts</a>. |
| </p> |
| <table class="menu" border="0" cellspacing="0"> |
| <tr><td align="left" valign="top">• <a href="Basic-Script-Concepts.html#Basic-Script-Concepts" accesskey="1">Basic Script Concepts</a>:</td><td> </td><td align="left" valign="top">Basic Linker Script Concepts |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Script-Format.html#Script-Format" accesskey="2">Script Format</a>:</td><td> </td><td align="left" valign="top">Linker Script Format |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Simple-Example.html#Simple-Example" accesskey="3">Simple Example</a>:</td><td> </td><td align="left" valign="top">Simple Linker Script Example |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Simple-Commands.html#Simple-Commands" accesskey="4">Simple Commands</a>:</td><td> </td><td align="left" valign="top">Simple Linker Script Commands |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Assignments.html#Assignments" accesskey="5">Assignments</a>:</td><td> </td><td align="left" valign="top">Assigning Values to Symbols |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="SECTIONS.html#SECTIONS" accesskey="6">SECTIONS</a>:</td><td> </td><td align="left" valign="top">SECTIONS Command |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="MEMORY.html#MEMORY" accesskey="7">MEMORY</a>:</td><td> </td><td align="left" valign="top">MEMORY Command |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="PHDRS.html#PHDRS" accesskey="8">PHDRS</a>:</td><td> </td><td align="left" valign="top">PHDRS Command |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="VERSION.html#VERSION" accesskey="9">VERSION</a>:</td><td> </td><td align="left" valign="top">VERSION Command |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Expressions.html#Expressions">Expressions</a>:</td><td> </td><td align="left" valign="top">Expressions in Linker Scripts |
| </td></tr> |
| <tr><td align="left" valign="top">• <a href="Implicit-Linker-Scripts.html#Implicit-Linker-Scripts">Implicit Linker Scripts</a>:</td><td> </td><td align="left" valign="top">Implicit Linker Scripts |
| </td></tr> |
| </table> |
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| Next: <a href="Machine-Dependent.html#Machine-Dependent" accesskey="n" rel="next">Machine Dependent</a>, Previous: <a href="Invocation.html#Invocation" accesskey="p" rel="prev">Invocation</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="LD-Index.html#LD-Index" title="Index" rel="index">Index</a>]</p> |
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