You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
3.6 KiB
HTML
86 lines
3.6 KiB
HTML
4 years ago
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>File - Using as</title>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html">
|
||
|
|
<meta name="description" content="Using as">
|
||
|
|
<meta name="generator" content="makeinfo 4.13">
|
||
|
|
<link title="Top" rel="start" href="index.html#Top">
|
||
|
|
<link rel="up" href="Pseudo-Ops.html#Pseudo-Ops" title="Pseudo Ops">
|
||
|
|
<link rel="prev" href="Fail.html#Fail" title="Fail">
|
||
|
|
<link rel="next" href="Fill.html#Fill" title="Fill">
|
||
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
||
|
|
<!--
|
||
|
|
This file documents the GNU Assembler "as".
|
||
|
|
|
||
|
|
Copyright (C) 1991-2015 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 1.3
|
||
|
|
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; }
|
||
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
||
|
|
--></style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div class="node">
|
||
|
|
<a name="File"></a>
|
||
|
|
<p>
|
||
|
|
Next: <a rel="next" accesskey="n" href="Fill.html#Fill">Fill</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="Fail.html#Fail">Fail</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="Pseudo-Ops.html#Pseudo-Ops">Pseudo Ops</a>
|
||
|
|
<hr>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h3 class="section">7.32 <code>.file</code></h3>
|
||
|
|
|
||
|
|
<p><a name="index-g_t_0040code_007bfile_007d-directive-338"></a>
|
||
|
|
There are two different versions of the <code>.file</code> directive. Targets
|
||
|
|
that support DWARF2 line number information use the DWARF2 version of
|
||
|
|
<code>.file</code>. Other targets use the default version.
|
||
|
|
|
||
|
|
<h4 class="subheading">Default Version</h4>
|
||
|
|
|
||
|
|
<p><a name="index-logical-file-name-339"></a><a name="index-file-name_002c-logical-340"></a>This version of the <code>.file</code> directive tells <samp><span class="command">as</span></samp> that we
|
||
|
|
are about to start a new logical file. The syntax is:
|
||
|
|
|
||
|
|
<pre class="smallexample"> .file <var>string</var>
|
||
|
|
</pre>
|
||
|
|
<p><var>string</var> is the new file name. In general, the filename is
|
||
|
|
recognized whether or not it is surrounded by quotes ‘<samp><span class="samp">"</span></samp>’; but if you wish
|
||
|
|
to specify an empty file name, you must give the quotes–<code>""</code>. This
|
||
|
|
statement may go away in future: it is only recognized to be compatible with
|
||
|
|
old <samp><span class="command">as</span></samp> programs.
|
||
|
|
|
||
|
|
<h4 class="subheading">DWARF2 Version</h4>
|
||
|
|
|
||
|
|
<p>When emitting DWARF2 line number information, <code>.file</code> assigns filenames
|
||
|
|
to the <code>.debug_line</code> file name table. The syntax is:
|
||
|
|
|
||
|
|
<pre class="smallexample"> .file <var>fileno</var> <var>filename</var>
|
||
|
|
</pre>
|
||
|
|
<p>The <var>fileno</var> operand should be a unique positive integer to use as the
|
||
|
|
index of the entry in the table. The <var>filename</var> operand is a C string
|
||
|
|
literal.
|
||
|
|
|
||
|
|
<p>The detail of filename indices is exposed to the user because the filename
|
||
|
|
table is shared with the <code>.debug_info</code> section of the DWARF2 debugging
|
||
|
|
information, and thus the user must know the exact indices that table
|
||
|
|
entries will have.
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|