134 lines
5.9 KiB
HTML
134 lines
5.9 KiB
HTML
|
<!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) 1991-2016 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: Input Files</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Using as: Input Files">
|
||
|
|
<meta name="keywords" content="Using as: Input Files">
|
||
|
|
<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="Overview.html#Overview" rel="up" title="Overview">
|
||
|
|
<link href="Object.html#Object" rel="next" title="Object">
|
||
|
|
<link href="Command-Line.html#Command-Line" rel="prev" title="Command Line">
|
||
|
|
<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="Input-Files"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Object.html#Object" accesskey="n" rel="next">Object</a>, Previous: <a href="Command-Line.html#Command-Line" accesskey="p" rel="prev">Command Line</a>, Up: <a href="Overview.html#Overview" accesskey="u" rel="up">Overview</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="Input-Files-1"></a>
|
||
|
|
<h3 class="section">1.5 Input Files</h3>
|
||
|
|
|
||
|
|
<a name="index-input"></a>
|
||
|
|
<a name="index-source-program"></a>
|
||
|
|
<a name="index-files_002c-input"></a>
|
||
|
|
<p>We use the phrase <em>source program</em>, abbreviated <em>source</em>, to
|
||
|
|
describe the program input to one run of <code>as</code>. The program may
|
||
|
|
be in one or more files; how the source is partitioned into files
|
||
|
|
doesn’t change the meaning of the source.
|
||
|
|
</p>
|
||
|
|
<p>The source program is a concatenation of the text in all the files, in the
|
||
|
|
order specified.
|
||
|
|
</p>
|
||
|
|
<p>Each time you run <code>as</code> it assembles exactly one source
|
||
|
|
program. The source program is made up of one or more files.
|
||
|
|
(The standard input is also a file.)
|
||
|
|
</p>
|
||
|
|
<p>You give <code>as</code> a command line that has zero or more input file
|
||
|
|
names. The input files are read (from left file name to right). A
|
||
|
|
command line argument (in any position) that has no special meaning
|
||
|
|
is taken to be an input file name.
|
||
|
|
</p>
|
||
|
|
<p>If you give <code>as</code> no file names it attempts to read one input file
|
||
|
|
from the <code>as</code> standard input, which is normally your terminal. You
|
||
|
|
may have to type <tt class="key">ctl-D</tt> to tell <code>as</code> there is no more program
|
||
|
|
to assemble.
|
||
|
|
</p>
|
||
|
|
<p>Use ‘<samp>--</samp>’ if you need to explicitly name the standard input file
|
||
|
|
in your command line.
|
||
|
|
</p>
|
||
|
|
<p>If the source is empty, <code>as</code> produces a small, empty object
|
||
|
|
file.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<a name="Filenames-and-Line_002dnumbers"></a>
|
||
|
|
<h4 class="subheading">Filenames and Line-numbers</h4>
|
||
|
|
|
||
|
|
<a name="index-input-file-linenumbers"></a>
|
||
|
|
<a name="index-line-numbers_002c-in-input-files"></a>
|
||
|
|
<p>There are two ways of locating a line in the input file (or files) and
|
||
|
|
either may be used in reporting error messages. One way refers to a line
|
||
|
|
number in a physical file; the other refers to a line number in a
|
||
|
|
“logical” file. See <a href="Errors.html#Errors">Error and Warning Messages</a>.
|
||
|
|
</p>
|
||
|
|
<p><em>Physical files</em> are those files named in the command line given
|
||
|
|
to <code>as</code>.
|
||
|
|
</p>
|
||
|
|
<p><em>Logical files</em> are simply names declared explicitly by assembler
|
||
|
|
directives; they bear no relation to physical files. Logical file names help
|
||
|
|
error messages reflect the original source file, when <code>as</code> source
|
||
|
|
is itself synthesized from other files. <code>as</code> understands the
|
||
|
|
‘<samp>#</samp>’ directives emitted by the <code>gcc</code> preprocessor. See also
|
||
|
|
<a href="File.html#File"><code>.file</code></a>.
|
||
|
|
</p>
|
||
|
|
<hr>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Object.html#Object" accesskey="n" rel="next">Object</a>, Previous: <a href="Command-Line.html#Command-Line" accesskey="p" rel="prev">Command Line</a>, Up: <a href="Overview.html#Overview" accesskey="u" rel="up">Overview</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>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|