74 lines
3.3 KiB
HTML
74 lines
3.3 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>MMIX - Untitled</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Untitled">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="Machine-Dependent.html#Machine-Dependent" title="Machine Dependent">
|
|
<link rel="prev" href="MIPS.html#MIPS" title="MIPS">
|
|
<link rel="next" href="MSP430.html#MSP430" title="MSP430">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the GNU linker LD
|
|
(GNU Toolchain for the A-profile Architecture 9.2-2019.12 (arm-9.10))
|
|
version 2.33.1.
|
|
|
|
Copyright (C) 1991-2019 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="MMIX"></a>
|
|
<p>
|
|
Next: <a rel="next" accesskey="n" href="MSP430.html#MSP430">MSP430</a>,
|
|
Previous: <a rel="previous" accesskey="p" href="MIPS.html#MIPS">MIPS</a>,
|
|
Up: <a rel="up" accesskey="u" href="Machine-Dependent.html#Machine-Dependent">Machine Dependent</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h3 class="section">4.7 <code>ld</code> and MMIX</h3>
|
|
|
|
<p>For MMIX, there is a choice of generating <code>ELF</code> object files or
|
|
<code>mmo</code> object files when linking. The simulator <code>mmix</code>
|
|
understands the <code>mmo</code> format. The binutils <code>objcopy</code> utility
|
|
can translate between the two formats.
|
|
|
|
<p>There is one special section, the ‘<samp><span class="samp">.MMIX.reg_contents</span></samp>’ section.
|
|
Contents in this section is assumed to correspond to that of global
|
|
registers, and symbols referring to it are translated to special symbols,
|
|
equal to registers. In a final link, the start address of the
|
|
‘<samp><span class="samp">.MMIX.reg_contents</span></samp>’ section corresponds to the first allocated
|
|
global register multiplied by 8. Register <code>$255</code> is not included in
|
|
this section; it is always set to the program entry, which is at the
|
|
symbol <code>Main</code> for <code>mmo</code> files.
|
|
|
|
<p>Global symbols with the prefix <code>__.MMIX.start.</code>, for example
|
|
<code>__.MMIX.start..text</code> and <code>__.MMIX.start..data</code> are special.
|
|
The default linker script uses these to set the default start address
|
|
of a section.
|
|
|
|
<p>Initial and trailing multiples of zero-valued 32-bit words in a section,
|
|
are left out from an mmo file.
|
|
|
|
</body></html>
|
|
|