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80 lines
3.1 KiB
HTML
80 lines
3.1 KiB
HTML
15 years ago
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<html lang="en">
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<title>ARM-Relocations - Using as</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.7">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="ARM-Syntax.html#ARM-Syntax" title="ARM Syntax">
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<link rel="prev" href="ARM_002dRegs.html#ARM_002dRegs" title="ARM-Regs">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
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2006, 2007 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 1.1
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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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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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man end-->
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<style type="text/css"><!--
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--></style>
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</head>
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<body>
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<div class="node">
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<p>
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<a name="ARM_002dRelocations"></a>Previous: <a rel="previous" accesskey="p" href="ARM_002dRegs.html#ARM_002dRegs">ARM-Regs</a>,
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Up: <a rel="up" accesskey="u" href="ARM-Syntax.html#ARM-Syntax">ARM Syntax</a>
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<hr><br>
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</div>
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<h5 class="subsubsection">9.3.3.1 ARM relocation generation</h5>
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<p><a name="index-data-relocations_002c-ARM-597"></a><a name="index-ARM-data-relocations-598"></a>Specific data relocations can be generated by putting the relocation name
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in parentheses after the symbol name. For example:
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<pre class="smallexample"> .word foo(TARGET1)
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</pre>
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<p>This will generate an <span class="samp">R_ARM_TARGET1</span> relocation against the symbol
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<var>foo</var>.
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The following relocations are supported:
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<code>GOT</code>,
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<code>GOTOFF</code>,
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<code>TARGET1</code>,
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<code>TARGET2</code>,
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<code>SBREL</code>,
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<code>TLSGD</code>,
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<code>TLSLDM</code>,
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<code>TLSLDO</code>,
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<code>GOTTPOFF</code>
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and
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<code>TPOFF</code>.
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<p>For compatibility with older toolchains the assembler also accepts
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<code>(PLT)</code> after branch targets. This will generate the deprecated
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<span class="samp">R_ARM_PLT32</span> relocation.
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<p><a name="index-MOVW-and-MOVT-relocations_002c-ARM-599"></a>Relocations for <span class="samp">MOVW</span> and <span class="samp">MOVT</span> instructions can be generated
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by prefixing the value with <span class="samp">#:lower16:</span> and <span class="samp">#:upper16</span>
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respectively. For example to load the 32-bit address of foo into r0:
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<pre class="smallexample"> MOVW r0, #:lower16:foo
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MOVT r0, #:upper16:foo
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</pre>
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</body></html>
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