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499 lines
20 KiB
HTML
499 lines
20 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1991-2019 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 1.3
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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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-->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>readelf (GNU Binary Utilities)</title>
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<meta name="description" content="readelf (GNU Binary Utilities)">
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<meta name="keywords" content="readelf (GNU Binary Utilities)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Binutils-Index.html#Binutils-Index" rel="index" title="Binutils Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="index.html#Top" rel="up" title="Top">
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<link href="elfedit.html#elfedit" rel="next" title="elfedit">
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<link href="def-file-format.html#def-file-format" rel="prev" title="def file format">
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<style type="text/css">
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</head>
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<body lang="en">
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<a name="readelf"></a>
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<div class="header">
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<p>
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Next: <a href="elfedit.html#elfedit" accesskey="n" rel="next">elfedit</a>, Previous: <a href="dlltool.html#dlltool" accesskey="p" rel="prev">dlltool</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Binutils-Index.html#Binutils-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="readelf-1"></a>
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<h2 class="chapter">14 readelf</h2>
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<a name="index-ELF-file-information"></a>
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<a name="index-readelf"></a>
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<div class="smallexample">
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<pre class="smallexample">readelf [<samp>-a</samp>|<samp>--all</samp>]
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[<samp>-h</samp>|<samp>--file-header</samp>]
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[<samp>-l</samp>|<samp>--program-headers</samp>|<samp>--segments</samp>]
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[<samp>-S</samp>|<samp>--section-headers</samp>|<samp>--sections</samp>]
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[<samp>-g</samp>|<samp>--section-groups</samp>]
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[<samp>-t</samp>|<samp>--section-details</samp>]
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[<samp>-e</samp>|<samp>--headers</samp>]
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[<samp>-s</samp>|<samp>--syms</samp>|<samp>--symbols</samp>]
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[<samp>--dyn-syms</samp>]
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[<samp>-n</samp>|<samp>--notes</samp>]
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[<samp>-r</samp>|<samp>--relocs</samp>]
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[<samp>-u</samp>|<samp>--unwind</samp>]
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[<samp>-d</samp>|<samp>--dynamic</samp>]
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[<samp>-V</samp>|<samp>--version-info</samp>]
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[<samp>-A</samp>|<samp>--arch-specific</samp>]
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[<samp>-D</samp>|<samp>--use-dynamic</samp>]
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[<samp>-x</samp> <number or name>|<samp>--hex-dump=</samp><number or name>]
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[<samp>-p</samp> <number or name>|<samp>--string-dump=</samp><number or name>]
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[<samp>-R</samp> <number or name>|<samp>--relocated-dump=</samp><number or name>]
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[<samp>-z</samp>|<samp>--decompress</samp>]
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[<samp>-c</samp>|<samp>--archive-index</samp>]
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[<samp>-w[lLiaprmfFsoRtUuTgAckK]</samp>|
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<samp>--debug-dump</samp>[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]]
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[<samp>--dwarf-depth=<var>n</var></samp>]
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[<samp>--dwarf-start=<var>n</var></samp>]
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[<samp>-I</samp>|<samp>--histogram</samp>]
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[<samp>-v</samp>|<samp>--version</samp>]
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[<samp>-W</samp>|<samp>--wide</samp>]
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[<samp>-H</samp>|<samp>--help</samp>]
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<var>elffile</var>…
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</pre></div>
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<p><code>readelf</code> displays information about one or more ELF format object
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files. The options control what particular information to display.
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</p>
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<p><var>elffile</var>… are the object files to be examined. 32-bit and
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64-bit ELF files are supported, as are archives containing ELF files.
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</p>
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<p>This program performs a similar function to <code>objdump</code> but it
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goes into more detail and it exists independently of the <small>BFD</small>
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library, so if there is a bug in <small>BFD</small> then readelf will not be
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affected.
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</p>
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<p>The long and short forms of options, shown here as alternatives, are
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equivalent. At least one option besides ‘<samp>-v</samp>’ or ‘<samp>-H</samp>’ must be
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given.
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</p>
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<dl compact="compact">
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<dt><code>-a</code></dt>
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<dt><code>--all</code></dt>
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<dd><p>Equivalent to specifying <samp>--file-header</samp>,
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<samp>--program-headers</samp>, <samp>--sections</samp>, <samp>--symbols</samp>,
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<samp>--relocs</samp>, <samp>--dynamic</samp>, <samp>--notes</samp>,
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<samp>--version-info</samp>, <samp>--arch-specific</samp>, <samp>--unwind</samp>,
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<samp>--section-groups</samp> and <samp>--histogram</samp>.
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</p>
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<p>Note - this option does not enable <samp>--use-dynamic</samp> itself, so
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if that option is not present on the command line then dynamic symbols
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and dynamic relocs will not be displayed.
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</p>
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</dd>
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<dt><code>-h</code></dt>
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<dt><code>--file-header</code></dt>
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<dd><a name="index-ELF-file-header-information"></a>
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<p>Displays the information contained in the ELF header at the start of the
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file.
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</p>
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</dd>
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<dt><code>-l</code></dt>
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<dt><code>--program-headers</code></dt>
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<dt><code>--segments</code></dt>
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<dd><a name="index-ELF-program-header-information"></a>
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<a name="index-ELF-segment-information"></a>
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<p>Displays the information contained in the file’s segment headers, if it
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has any.
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</p>
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</dd>
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<dt><code>-S</code></dt>
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<dt><code>--sections</code></dt>
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<dt><code>--section-headers</code></dt>
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<dd><a name="index-ELF-section-information"></a>
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<p>Displays the information contained in the file’s section headers, if it
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has any.
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</p>
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</dd>
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<dt><code>-g</code></dt>
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<dt><code>--section-groups</code></dt>
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<dd><a name="index-ELF-section-group-information"></a>
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<p>Displays the information contained in the file’s section groups, if it
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has any.
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</p>
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</dd>
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<dt><code>-t</code></dt>
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<dt><code>--section-details</code></dt>
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<dd><a name="index-ELF-section-information-1"></a>
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<p>Displays the detailed section information. Implies <samp>-S</samp>.
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</p>
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</dd>
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<dt><code>-s</code></dt>
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<dt><code>--symbols</code></dt>
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<dt><code>--syms</code></dt>
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<dd><a name="index-ELF-symbol-table-information"></a>
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<p>Displays the entries in symbol table section of the file, if it has one.
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If a symbol has version information associated with it then this is
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displayed as well. The version string is displayed as a suffix to the
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symbol name, preceeded by an @ character. For example
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‘<samp>foo@VER_1</samp>’. If the version is the default version to be used
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when resolving unversioned references to the symbol then it is
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displayed as a suffix preceeded by two @ characters. For example
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‘<samp>foo@@VER_2</samp>’.
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</p>
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</dd>
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<dt><code>--dyn-syms</code></dt>
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<dd><a name="index-ELF-dynamic-symbol-table-information"></a>
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<p>Displays the entries in dynamic symbol table section of the file, if it
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has one. The output format is the same as the format used by the
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<samp>--syms</samp> option.
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</p>
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</dd>
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<dt><code>-e</code></dt>
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<dt><code>--headers</code></dt>
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<dd><p>Display all the headers in the file. Equivalent to <samp>-h -l -S</samp>.
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</p>
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</dd>
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<dt><code>-n</code></dt>
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<dt><code>--notes</code></dt>
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<dd><a name="index-ELF-notes"></a>
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<p>Displays the contents of the NOTE segments and/or sections, if any.
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</p>
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</dd>
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<dt><code>-r</code></dt>
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<dt><code>--relocs</code></dt>
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<dd><a name="index-ELF-reloc-information"></a>
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<p>Displays the contents of the file’s relocation section, if it has one.
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</p>
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</dd>
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<dt><code>-u</code></dt>
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<dt><code>--unwind</code></dt>
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<dd><a name="index-unwind-information"></a>
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<p>Displays the contents of the file’s unwind section, if it has one. Only
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the unwind sections for IA64 ELF files, as well as ARM unwind tables
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(<code>.ARM.exidx</code> / <code>.ARM.extab</code>) are currently supported. If
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support is not yet implemented for your architecture you could try
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dumping the contents of the <var>.eh_frames</var> section using the
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<samp>--debug-dump=frames</samp> or <samp>--debug-dump=frames-interp</samp>
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options.
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</p>
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</dd>
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<dt><code>-d</code></dt>
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<dt><code>--dynamic</code></dt>
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<dd><a name="index-ELF-dynamic-section-information"></a>
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<p>Displays the contents of the file’s dynamic section, if it has one.
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</p>
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</dd>
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<dt><code>-V</code></dt>
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<dt><code>--version-info</code></dt>
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<dd><a name="index-ELF-version-sections-information"></a>
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<p>Displays the contents of the version sections in the file, it they
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exist.
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</p>
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</dd>
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<dt><code>-A</code></dt>
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<dt><code>--arch-specific</code></dt>
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<dd><p>Displays architecture-specific information in the file, if there
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is any.
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</p>
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</dd>
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<dt><code>-D</code></dt>
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<dt><code>--use-dynamic</code></dt>
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<dd><p>When displaying symbols, this option makes <code>readelf</code> use the
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symbol hash tables in the file’s dynamic section, rather than the
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symbol table sections.
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</p>
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<p>When displaying relocations, this option makes <code>readelf</code>
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display the dynamic relocations rather than the static relocations.
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</p>
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</dd>
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<dt><code>-x <number or name></code></dt>
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<dt><code>--hex-dump=<number or name></code></dt>
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<dd><p>Displays the contents of the indicated section as a hexadecimal bytes.
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A number identifies a particular section by index in the section table;
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any other string identifies all sections with that name in the object file.
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</p>
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</dd>
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<dt><code>-R <number or name></code></dt>
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<dt><code>--relocated-dump=<number or name></code></dt>
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<dd><p>Displays the contents of the indicated section as a hexadecimal
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bytes. A number identifies a particular section by index in the
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section table; any other string identifies all sections with that name
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in the object file. The contents of the section will be relocated
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before they are displayed.
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</p>
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</dd>
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<dt><code>-p <number or name></code></dt>
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<dt><code>--string-dump=<number or name></code></dt>
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<dd><p>Displays the contents of the indicated section as printable strings.
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A number identifies a particular section by index in the section table;
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any other string identifies all sections with that name in the object file.
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</p>
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</dd>
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<dt><code>-z</code></dt>
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<dt><code>--decompress</code></dt>
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<dd><p>Requests that the section(s) being dumped by <samp>x</samp>, <samp>R</samp> or
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<samp>p</samp> options are decompressed before being displayed. If the
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section(s) are not compressed then they are displayed as is.
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</p>
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</dd>
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<dt><code>-c</code></dt>
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<dt><code>--archive-index</code></dt>
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<dd><a name="index-Archive-file-symbol-index-information"></a>
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<p>Displays the file symbol index information contained in the header part
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of binary archives. Performs the same function as the <samp>t</samp>
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command to <code>ar</code>, but without using the BFD library. See <a href="ar.html#ar">ar</a>.
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</p>
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</dd>
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<dt><code>-w[lLiaprmfFsoRtUuTgAckK]</code></dt>
|
||
|
|
<dt><code>--debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]</code></dt>
|
||
|
|
<dd>
|
||
|
|
<p>Displays the contents of the DWARF debug sections in the file, if any
|
||
|
|
are present. Compressed debug sections are automatically decompressed
|
||
|
|
(temporarily) before they are displayed. If one or more of the
|
||
|
|
optional letters or words follows the switch then only those type(s)
|
||
|
|
of data will be dumped. The letters and words refer to the following
|
||
|
|
information:
|
||
|
|
</p>
|
||
|
|
<dl compact="compact">
|
||
|
|
<dt><code>a</code></dt>
|
||
|
|
<dt><code>=abbrev</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_abbrev</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>A</code></dt>
|
||
|
|
<dt><code>=addr</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_addr</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>c</code></dt>
|
||
|
|
<dt><code>=cu_index</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_cu_index</samp>’ and/or
|
||
|
|
‘<samp>.debug_tu_index</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>f</code></dt>
|
||
|
|
<dt><code>=frames</code></dt>
|
||
|
|
<dd><p>Display the raw contents of a ‘<samp>.debug_frame</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>F</code></dt>
|
||
|
|
<dt><code>=frame-interp</code></dt>
|
||
|
|
<dd><p>Display the interpreted contents of a ‘<samp>.debug_frame</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>g</code></dt>
|
||
|
|
<dt><code>=gdb_index</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.gdb_index</samp>’ and/or
|
||
|
|
‘<samp>.debug_names</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>i</code></dt>
|
||
|
|
<dt><code>=info</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_info</samp>’ section. Note: the
|
||
|
|
output from this option can also be restricted by the use of the
|
||
|
|
<samp>--dwarf-depth</samp> and <samp>--dwarf-start</samp> options.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>k</code></dt>
|
||
|
|
<dt><code>=links</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.gnu_debuglink</samp>’ and/or
|
||
|
|
‘<samp>.gnu_debugaltlink</samp>’ sections. Also displays the link to a
|
||
|
|
separate dwarf object file (dwo), if one is specified by the
|
||
|
|
DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
|
||
|
|
‘<samp>.debug_info</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>K</code></dt>
|
||
|
|
<dt><code>=follow-links</code></dt>
|
||
|
|
<dd><p>Display the contents of any selected debug sections that are found in
|
||
|
|
a linked, separate debug info file. This can result in multiple
|
||
|
|
versions of the same debug section being displayed if both the main
|
||
|
|
file and the separate debug info file contain sections with the same
|
||
|
|
name.
|
||
|
|
</p>
|
||
|
|
<p>In addition, when displaying DWARF attributes, if a form is found that
|
||
|
|
references the separate debug info file, then the referenced contents
|
||
|
|
will also be displayed.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>l</code></dt>
|
||
|
|
<dt><code>=rawline</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_line</samp>’ section in a raw
|
||
|
|
format.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>L</code></dt>
|
||
|
|
<dt><code>=decodedline</code></dt>
|
||
|
|
<dd><p>Displays the interpreted contents of the ‘<samp>.debug_line</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>m</code></dt>
|
||
|
|
<dt><code>=macro</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_macro</samp>’ and/or
|
||
|
|
‘<samp>.debug_macinfo</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>o</code></dt>
|
||
|
|
<dt><code>=loc</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_loc</samp>’ and/or
|
||
|
|
‘<samp>.debug_loclists</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>p</code></dt>
|
||
|
|
<dt><code>=pubnames</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_pubnames</samp>’ and/or
|
||
|
|
‘<samp>.debug_gnu_pubnames</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>r</code></dt>
|
||
|
|
<dt><code>=aranges</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_aranges</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>R</code></dt>
|
||
|
|
<dt><code>=Ranges</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_ranges</samp>’ and/or
|
||
|
|
‘<samp>.debug_rnglists</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>s</code></dt>
|
||
|
|
<dt><code>=str</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_str</samp>’, ‘<samp>.debug_line_str</samp>’
|
||
|
|
and/or ‘<samp>.debug_str_offsets</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>t</code></dt>
|
||
|
|
<dt><code>=pubtype</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.debug_pubtypes</samp>’ and/or
|
||
|
|
‘<samp>.debug_gnu_pubtypes</samp>’ sections.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>T</code></dt>
|
||
|
|
<dt><code>=trace_aranges</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.trace_aranges</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>u</code></dt>
|
||
|
|
<dt><code>=trace_abbrev</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.trace_abbrev</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>U</code></dt>
|
||
|
|
<dt><code>=trace_info</code></dt>
|
||
|
|
<dd><p>Displays the contents of the ‘<samp>.trace_info</samp>’ section.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<p>Note: displaying the contents of ‘<samp>.debug_static_funcs</samp>’,
|
||
|
|
‘<samp>.debug_static_vars</samp>’ and ‘<samp>debug_weaknames</samp>’ sections is not
|
||
|
|
currently supported.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>--dwarf-depth=<var>n</var></code></dt>
|
||
|
|
<dd><p>Limit the dump of the <code>.debug_info</code> section to <var>n</var> children.
|
||
|
|
This is only useful with <samp>--debug-dump=info</samp>. The default is
|
||
|
|
to print all DIEs; the special value 0 for <var>n</var> will also have this
|
||
|
|
effect.
|
||
|
|
</p>
|
||
|
|
<p>With a non-zero value for <var>n</var>, DIEs at or deeper than <var>n</var>
|
||
|
|
levels will not be printed. The range for <var>n</var> is zero-based.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>--dwarf-start=<var>n</var></code></dt>
|
||
|
|
<dd><p>Print only DIEs beginning with the DIE numbered <var>n</var>. This is only
|
||
|
|
useful with <samp>--debug-dump=info</samp>.
|
||
|
|
</p>
|
||
|
|
<p>If specified, this option will suppress printing of any header
|
||
|
|
information and all DIEs before the DIE numbered <var>n</var>. Only
|
||
|
|
siblings and children of the specified DIE will be printed.
|
||
|
|
</p>
|
||
|
|
<p>This can be used in conjunction with <samp>--dwarf-depth</samp>.
|
||
|
|
</p>
|
||
|
|
|
||
|
|
</dd>
|
||
|
|
<dt><code>-I</code></dt>
|
||
|
|
<dt><code>--histogram</code></dt>
|
||
|
|
<dd><p>Display a histogram of bucket list lengths when displaying the contents
|
||
|
|
of the symbol tables.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>-v</code></dt>
|
||
|
|
<dt><code>--version</code></dt>
|
||
|
|
<dd><p>Display the version number of readelf.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>-W</code></dt>
|
||
|
|
<dt><code>--wide</code></dt>
|
||
|
|
<dd><p>Don’t break output lines to fit into 80 columns. By default
|
||
|
|
<code>readelf</code> breaks section header and segment listing lines for
|
||
|
|
64-bit ELF files, so that they fit into 80 columns. This option causes
|
||
|
|
<code>readelf</code> to print each section header resp. each segment one a
|
||
|
|
single line, which is far more readable on terminals wider than 80 columns.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
<dt><code>-H</code></dt>
|
||
|
|
<dt><code>--help</code></dt>
|
||
|
|
<dd><p>Display the command-line options understood by <code>readelf</code>.
|
||
|
|
</p>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="elfedit.html#elfedit" accesskey="n" rel="next">elfedit</a>, Previous: <a href="dlltool.html#dlltool" accesskey="p" rel="prev">dlltool</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Binutils-Index.html#Binutils-Index" title="Index" rel="index">Index</a>]</p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|