78 lines
4.5 KiB
HTML
78 lines
4.5 KiB
HTML
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<title>listing - Using as</title>
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<link rel="up" href="Invoking.html#Invoking" title="Invoking">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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<div class="node">
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<a name="listing"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="M.html#M">M</a>,
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Previous: <a rel="previous" accesskey="p" href="L.html#L">L</a>,
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Up: <a rel="up" accesskey="u" href="Invoking.html#Invoking">Invoking</a>
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</div>
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<h3 class="section">2.8 Configuring listing output: <samp><span class="option">--listing</span></samp></h3>
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<p>The listing feature of the assembler can be enabled via the command-line switch
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‘<samp><span class="samp">-a</span></samp>’ (see <a href="a.html#a">a</a>). This feature combines the input source file(s) with a
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hex dump of the corresponding locations in the output object file, and displays
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them as a listing file. The format of this listing can be controlled by
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directives inside the assembler source (i.e., <code>.list</code> (see <a href="List.html#List">List</a>),
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<code>.title</code> (see <a href="Title.html#Title">Title</a>), <code>.sbttl</code> (see <a href="Sbttl.html#Sbttl">Sbttl</a>),
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<code>.psize</code> (see <a href="Psize.html#Psize">Psize</a>), and
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<code>.eject</code> (see <a href="Eject.html#Eject">Eject</a>) and also by the following switches:
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<dl>
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<dt><code>--listing-lhs-width=‘</code><samp><span class="samp">number</span></samp><code>’</code><dd><a name="index-g_t_002d_002dlisting_002dlhs_002dwidth-71"></a><a name="index-Width-of-first-line-disassembly-output-72"></a>Sets the maximum width, in words, of the first line of the hex byte dump. This
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dump appears on the left hand side of the listing output.
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<br><dt><code>--listing-lhs-width2=‘</code><samp><span class="samp">number</span></samp><code>’</code><dd><a name="index-g_t_002d_002dlisting_002dlhs_002dwidth2-73"></a><a name="index-Width-of-continuation-lines-of-disassembly-output-74"></a>Sets the maximum width, in words, of any further lines of the hex byte dump for
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a given input source line. If this value is not specified, it defaults to being
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the same as the value specified for ‘<samp><span class="samp">--listing-lhs-width</span></samp>’. If neither
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switch is used the default is to one.
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<br><dt><code>--listing-rhs-width=‘</code><samp><span class="samp">number</span></samp><code>’</code><dd><a name="index-g_t_002d_002dlisting_002drhs_002dwidth-75"></a><a name="index-Width-of-source-line-output-76"></a>Sets the maximum width, in characters, of the source line that is displayed
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alongside the hex dump. The default value for this parameter is 100. The
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source line is displayed on the right hand side of the listing output.
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<br><dt><code>--listing-cont-lines=‘</code><samp><span class="samp">number</span></samp><code>’</code><dd><a name="index-g_t_002d_002dlisting_002dcont_002dlines-77"></a><a name="index-Maximum-number-of-continuation-lines-78"></a>Sets the maximum number of continuation lines of hex dump that will be
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displayed for a given single line of source input. The default value is 4.
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</dl>
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</body></html>
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