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<p>
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<a name="readelf"></a>Next: <a rel="next" accesskey="n" href="size.html#size">size</a>,
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Previous: <a rel="previous" accesskey="p" href="ranlib.html#ranlib">ranlib</a>,
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Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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<hr><br>
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<h2 class="chapter">15 readelf</h2>
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<p><a name="index-ELF-file-information-126"></a><a name="index-readelf-127"></a>
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<!-- man title readelf Displays information about ELF files. -->
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<pre class="smallexample"> <!-- man begin SYNOPSIS readelf -->
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readelf [<span class="option">-a</span>|<span class="option">--all</span>]
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[<span class="option">-h</span>|<span class="option">--file-header</span>]
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[<span class="option">-l</span>|<span class="option">--program-headers</span>|<span class="option">--segments</span>]
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[<span class="option">-S</span>|<span class="option">--section-headers</span>|<span class="option">--sections</span>]
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[<span class="option">-g</span>|<span class="option">--section-groups</span>]
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[<span class="option">-t</span>|<span class="option">--section-details</span>]
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[<span class="option">-e</span>|<span class="option">--headers</span>]
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[<span class="option">-s</span>|<span class="option">--syms</span>|<span class="option">--symbols</span>]
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[<span class="option">-n</span>|<span class="option">--notes</span>]
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[<span class="option">-r</span>|<span class="option">--relocs</span>]
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[<span class="option">-u</span>|<span class="option">--unwind</span>]
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[<span class="option">-d</span>|<span class="option">--dynamic</span>]
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[<span class="option">-V</span>|<span class="option">--version-info</span>]
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[<span class="option">-A</span>|<span class="option">--arch-specific</span>]
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[<span class="option">-D</span>|<span class="option">--use-dynamic</span>]
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[<span class="option">-x</span> <number or name>|<span class="option">--hex-dump=</span><number or name>]
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[<span class="option">-p</span> <number or name>|<span class="option">--string-dump=</span><number or name>]
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[<span class="option">-c</span>|<span class="option">--archive-index</span>]
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[<span class="option">-w[lLiaprmfFsoR]</span>|
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<span class="option">--debug-dump</span>[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges]]
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[<span class="option">-I</span>|<span class="option">-histogram</span>]
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[<span class="option">-v</span>|<span class="option">--version</span>]
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[<span class="option">-W</span>|<span class="option">--wide</span>]
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[<span class="option">-H</span>|<span class="option">--help</span>]
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<var>elffile</var>...
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<!-- man end -->
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</pre>
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<!-- man begin DESCRIPTION readelf -->
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<p><span class="command">readelf</span> 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><var>elffile</var><small class="dots">...</small> 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>This program performs a similar function to <span class="command">objdump</span> but it
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goes into more detail and it exists independently of the <span class="sc">bfd</span>
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library, so if there is a bug in <span class="sc">bfd</span> then readelf will not be
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affected.
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<!-- man end -->
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<!-- man begin OPTIONS readelf -->
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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 <span class="samp">-v</span> or <span class="samp">-H</span> must be
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given.
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<dl>
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<dt><span class="env">-a</span><dt><span class="env">--all</span><dd>Equivalent to specifying <span class="option">--file-header</span>,
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<span class="option">--program-headers</span>, <span class="option">--sections</span>, <span class="option">--symbols</span>,
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<span class="option">--relocs</span>, <span class="option">--dynamic</span>, <span class="option">--notes</span> and
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<span class="option">--version-info</span>.
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<br><dt><span class="env">-h</span><dt><span class="env">--file-header</span><dd><a name="index-ELF-file-header-information-128"></a>Displays the information contained in the ELF header at the start of the
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file.
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<br><dt><span class="env">-l</span><dt><span class="env">--program-headers</span><dt><span class="env">--segments</span><dd><a name="index-ELF-program-header-information-129"></a><a name="index-ELF-segment-information-130"></a>Displays the information contained in the file's segment headers, if it
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has any.
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<br><dt><span class="env">-S</span><dt><span class="env">--sections</span><dt><span class="env">--section-headers</span><dd><a name="index-ELF-section-information-131"></a>Displays the information contained in the file's section headers, if it
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has any.
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<br><dt><span class="env">-g</span><dt><span class="env">--section-groups</span><dd><a name="index-ELF-section-group-information-132"></a>Displays the information contained in the file's section groups, if it
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has any.
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<br><dt><span class="env">-t</span><dt><span class="env">--section-details</span><dd><a name="index-ELF-section-information-133"></a>Displays the detailed section information. Implies <span class="option">-S</span>.
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<br><dt><span class="env">-s</span><dt><span class="env">--symbols</span><dt><span class="env">--syms</span><dd><a name="index-ELF-symbol-table-information-134"></a>Displays the entries in symbol table section of the file, if it has one.
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<br><dt><span class="env">-e</span><dt><span class="env">--headers</span><dd>Display all the headers in the file. Equivalent to <span class="option">-h -l -S</span>.
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<br><dt><span class="env">-n</span><dt><span class="env">--notes</span><dd><a name="index-ELF-notes-135"></a>Displays the contents of the NOTE segments and/or sections, if any.
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<br><dt><span class="env">-r</span><dt><span class="env">--relocs</span><dd><a name="index-ELF-reloc-information-136"></a>Displays the contents of the file's relocation section, if it has one.
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<br><dt><span class="env">-u</span><dt><span class="env">--unwind</span><dd><a name="index-unwind-information-137"></a>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 are currently supported.
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<br><dt><span class="env">-d</span><dt><span class="env">--dynamic</span><dd><a name="index-ELF-dynamic-section-information-138"></a>Displays the contents of the file's dynamic section, if it has one.
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<br><dt><span class="env">-V</span><dt><span class="env">--version-info</span><dd><a name="index-ELF-version-sections-informations-139"></a>Displays the contents of the version sections in the file, it they
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exist.
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<br><dt><span class="env">-A</span><dt><span class="env">--arch-specific</span><dd>Displays architecture-specific information in the file, if there
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is any.
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<br><dt><span class="env">-D</span><dt><span class="env">--use-dynamic</span><dd>When displaying symbols, this option makes <span class="command">readelf</span> use the
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symbol table in the file's dynamic section, rather than the one in the
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symbols section.
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<br><dt><span class="env">-x <number or name></span><dt><span class="env">--hex-dump=<number or name></span><dd>Displays the contents of the indicated section as a hexadecimal dump.
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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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<br><dt><span class="env">-p <number or name></span><dt><span class="env">--string-dump=<number or name></span><dd>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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<br><dt><span class="env">-c</span><dt><span class="env">--archive-index</span><dd><a name="index-Archive-file-symbol-index-information-140"></a>Displays the file symbol index infomation contained in the header part
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of binary archives. Performs the same function as the <span class="option">t</span>
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command to <span class="command">ar</span>, but without using the BFD library. See <a href="ar.html#ar">ar</a>.
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<br><dt><span class="env">-w[lLiaprmfFsoR]</span><dt><span class="env">--debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges]</span><dd>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>Note: the <span class="option">=decodedline</span> option will display the interpreted
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contents of a .debug_line section whereas the <span class="option">=rawline</span> option
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dumps the contents in a raw format.
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<br><dt><span class="env">-I</span><dt><span class="env">--histogram</span><dd>Display a histogram of bucket list lengths when displaying the contents
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of the symbol tables.
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<br><dt><span class="env">-v</span><dt><span class="env">--version</span><dd>Display the version number of readelf.
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<br><dt><span class="env">-W</span><dt><span class="env">--wide</span><dd>Don't break output lines to fit into 80 columns. By default
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<span class="command">readelf</span> breaks section header and segment listing lines for
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64-bit ELF files, so that they fit into 80 columns. This option causes
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<span class="command">readelf</span> to print each section header resp. each segment one a
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single line, which is far more readable on terminals wider than 80 columns.
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<br><dt><span class="env">-H</span><dt><span class="env">--help</span><dd>Display the command line options understood by <span class="command">readelf</span>.
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</dl>
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