| <html lang="en"> |
| <head> |
| <title>Orphan Sections - 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="Expressions.html#Expressions" title="Expressions"> |
| <link rel="prev" href="Symbols.html#Symbols" title="Symbols"> |
| <link rel="next" href="Location-Counter.html#Location-Counter" title="Location Counter"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| This file documents the GNU linker LD |
| (Sourcery G++ Lite 2011.03-41) |
| version 2.20.51. |
| |
| Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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> |
| <link rel="stylesheet" type="text/css" href="../cs.css"> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="Orphan-Sections"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="Location-Counter.html#Location-Counter">Location Counter</a>, |
| Previous: <a rel="previous" accesskey="p" href="Symbols.html#Symbols">Symbols</a>, |
| Up: <a rel="up" accesskey="u" href="Expressions.html#Expressions">Expressions</a> |
| <hr> |
| </div> |
| |
| <h4 class="subsection">3.10.4 Orphan Sections</h4> |
| |
| <p><a name="index-orphan-504"></a>Orphan sections are sections present in the input files which |
| are not explicitly placed into the output file by the linker |
| script. The linker will still copy these sections into the |
| output file, but it has to guess as to where they should be |
| placed. The linker uses a simple heuristic to do this. It |
| attempts to place orphan sections after non-orphan sections of the |
| same attribute, such as code vs data, loadable vs non-loadable, etc. |
| If there is not enough room to do this then it places |
| at the end of the file. |
| |
| <p>For ELF targets, the attribute of the section includes section type as |
| well as section flag. |
| |
| <p>If an orphaned section's name is representable as a C identifier then |
| the linker will automatically see <a href="PROVIDE.html#PROVIDE">PROVIDE</a> two symbols: |
| __start_SECNAME and __end_SECNAME, where SECNAME is the name of the |
| section. These indicate the start address and end address of the |
| orphaned section respectively. Note: most section names are not |
| representable as C identifiers because they contain a ‘<samp><span class="samp">.</span></samp>’ |
| character. |
| |
| </body></html> |
| |
