| <!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) 1991-2013 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: ARM-Relocations</title> |
| |
| <meta name="description" content="Using as: ARM-Relocations"> |
| <meta name="keywords" content="Using as: ARM-Relocations"> |
| <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="ARM-Syntax.html#ARM-Syntax" rel="up" title="ARM Syntax"> |
| <link href="ARM_002dNeon_002dAlignment.html#ARM_002dNeon_002dAlignment" rel="next" title="ARM-Neon-Alignment"> |
| <link href="ARM_002dRegs.html#ARM_002dRegs" rel="prev" title="ARM-Regs"> |
| <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="ARM_002dRelocations"></a> |
| <div class="header"> |
| <p> |
| Next: <a href="ARM_002dNeon_002dAlignment.html#ARM_002dNeon_002dAlignment" accesskey="n" rel="next">ARM-Neon-Alignment</a>, Previous: <a href="ARM_002dRegs.html#ARM_002dRegs" accesskey="p" rel="prev">ARM-Regs</a>, Up: <a href="ARM-Syntax.html#ARM-Syntax" accesskey="u" rel="up">ARM Syntax</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="ARM-relocation-generation"></a> |
| <h4 class="subsubsection">9.4.2.4 ARM relocation generation</h4> |
| |
| <a name="index-data-relocations_002c-ARM"></a> |
| <a name="index-ARM-data-relocations"></a> |
| <p>Specific data relocations can be generated by putting the relocation name |
| in parentheses after the symbol name. For example: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample"> .word foo(TARGET1) |
| </pre></div> |
| |
| <p>This will generate an ‘<samp>R_ARM_TARGET1</samp>’ relocation against the symbol |
| <var>foo</var>. |
| The following relocations are supported: |
| <code>GOT</code>, |
| <code>GOTOFF</code>, |
| <code>TARGET1</code>, |
| <code>TARGET2</code>, |
| <code>SBREL</code>, |
| <code>TLSGD</code>, |
| <code>TLSLDM</code>, |
| <code>TLSLDO</code>, |
| <code>TLSDESC</code>, |
| <code>TLSCALL</code>, |
| <code>GOTTPOFF</code>, |
| <code>GOT_PREL</code> |
| and |
| <code>TPOFF</code>. |
| </p> |
| <p>For compatibility with older toolchains the assembler also accepts |
| <code>(PLT)</code> after branch targets. On legacy targets this will |
| generate the deprecated ‘<samp>R_ARM_PLT32</samp>’ relocation. On EABI |
| targets it will encode either the ‘<samp>R_ARM_CALL</samp>’ or |
| ‘<samp>R_ARM_JUMP24</samp>’ relocation, as appropriate. |
| </p> |
| <a name="index-MOVW-and-MOVT-relocations_002c-ARM"></a> |
| <p>Relocations for ‘<samp>MOVW</samp>’ and ‘<samp>MOVT</samp>’ instructions can be generated |
| by prefixing the value with ‘<samp>#:lower16:</samp>’ and ‘<samp>#:upper16</samp>’ |
| respectively. For example to load the 32-bit address of foo into r0: |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample"> MOVW r0, #:lower16:foo |
| MOVT r0, #:upper16:foo |
| </pre></div> |
| |
| |
| |
| |
| </body> |
| </html> |
