354 lines
14 KiB
HTML
354 lines
14 KiB
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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) 1991-2016 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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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>GNU Binary Utilities: readelf</title>
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<meta name="description" content="GNU Binary Utilities: readelf">
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<meta name="keywords" content="GNU Binary Utilities: readelf">
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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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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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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">15 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[lLiaprmfFsoRt]</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]]
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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> and
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<samp>--version-info</samp>.
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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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</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.
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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.
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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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</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[lLiaprmfFsoRt]</code></dt>
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<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]</code></dt>
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<dd><p>Displays the contents of the debug sections in the file, if any are
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present. If one of the optional letters or words follows the switch
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then only data found in those specific sections will be dumped.
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</p>
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<p>Note that there is no single letter option to display the content of
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trace sections or .gdb_index.
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</p>
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<p>Note: the <samp>=decodedline</samp> option will display the interpreted
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contents of a .debug_line section whereas the <samp>=rawline</samp> option
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dumps the contents in a raw format.
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</p>
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<p>Note: the <samp>=frames-interp</samp> option will display the interpreted
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contents of a .debug_frame section whereas the <samp>=frames</samp> option
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dumps the contents in a raw format.
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</p>
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<p>Note: the output from the <samp>=info</samp> option can also be affected
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by the options <samp>--dwarf-depth</samp> and <samp>--dwarf-start</samp>.
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</p>
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</dd>
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<dt><code>--dwarf-depth=<var>n</var></code></dt>
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|
<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>
|
||
|
|
|
||
|
|
|
||
|
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|
||
|
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</body>
|
||
|
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</html>
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