| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html> |
| <!-- This file documents the GNU Assembler "as". |
| |
| Copyright (C) 1991-2014 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". |
| --> |
| <!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ --> |
| <head> |
| <title>Using as: File</title> |
| |
| <meta name="description" content="Using as: File"> |
| <meta name="keywords" content="Using as: File"> |
| <meta name="resource-type" content="document"> |
| <meta name="distribution" content="global"> |
| <meta name="Generator" content="makeinfo"> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> |
| <link href="index.html#Top" rel="start" title="Top"> |
| <link href="AS-Index.html#AS-Index" rel="index" title="AS Index"> |
| <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> |
| <link href="Pseudo-Ops.html#Pseudo-Ops" rel="up" title="Pseudo Ops"> |
| <link href="Fill.html#Fill" rel="next" title="Fill"> |
| <link href="Fail.html#Fail" rel="prev" title="Fail"> |
| <style type="text/css"> |
| <!-- |
| a.summary-letter {text-decoration: none} |
| blockquote.smallquotation {font-size: smaller} |
| div.display {margin-left: 3.2em} |
| div.example {margin-left: 3.2em} |
| div.indentedblock {margin-left: 3.2em} |
| div.lisp {margin-left: 3.2em} |
| div.smalldisplay {margin-left: 3.2em} |
| div.smallexample {margin-left: 3.2em} |
| div.smallindentedblock {margin-left: 3.2em; font-size: smaller} |
| div.smalllisp {margin-left: 3.2em} |
| kbd {font-style:oblique} |
| pre.display {font-family: inherit} |
| pre.format {font-family: inherit} |
| pre.menu-comment {font-family: serif} |
| pre.menu-preformatted {font-family: serif} |
| pre.smalldisplay {font-family: inherit; font-size: smaller} |
| pre.smallexample {font-size: smaller} |
| pre.smallformat {font-family: inherit; font-size: smaller} |
| pre.smalllisp {font-size: smaller} |
| span.nocodebreak {white-space:nowrap} |
| span.nolinebreak {white-space:nowrap} |
| span.roman {font-family:serif; font-weight:normal} |
| span.sansserif {font-family:sans-serif; font-weight:normal} |
| ul.no-bullet {list-style: none} |
| --> |
| </style> |
| |
| |
| </head> |
| |
| <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> |
| <a name="File"></a> |
| <div class="header"> |
| <p> |
| Next: <a href="Fill.html#Fill" accesskey="n" rel="next">Fill</a>, Previous: <a href="Fail.html#Fail" accesskey="p" rel="prev">Fail</a>, Up: <a href="Pseudo-Ops.html#Pseudo-Ops" accesskey="u" rel="up">Pseudo Ops</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p> |
| </div> |
| <hr> |
| <a name="g_t_002efile"></a> |
| <h3 class="section">7.53 <code>.file</code></h3> |
| <a name="index-file-directive"></a> |
| |
| <p>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. |
| </p> |
| <a name="Default-Version"></a> |
| <h4 class="subheading">Default Version</h4> |
| |
| <a name="index-logical-file-name"></a> |
| <a name="index-file-name_002c-logical"></a> |
| <p>This version of the <code>.file</code> directive tells <code>as</code> that we |
| are about to start a new logical file. The syntax is: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">.file <var>string</var> |
| </pre></div> |
| |
| <p><var>string</var> is the new file name. In general, the filename is |
| recognized whether or not it is surrounded by quotes ‘<samp>"</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 <code>as</code> programs. |
| </p> |
| <a name="DWARF2-Version"></a> |
| <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: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">.file <var>fileno</var> <var>filename</var> |
| </pre></div> |
| |
| <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> |
| <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. |
| </p> |
| |
| |
| |
| </body> |
| </html> |
