| <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> |
| |
