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820 lines
19 KiB
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of READELF</TITLE>
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</HEAD><BODY>
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<H1>READELF</H1>
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Section: GNU Development Tools (1)<BR>Updated: 2021-01-21<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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readelf - display information about ELF files
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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readelf [<B>-a</B>|<B>--all</B>]
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<BR> [<B>-h</B>|<B>--file-header</B>]
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<BR> [<B>-l</B>|<B>--program-headers</B>|<B>--segments</B>]
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<BR> [<B>-S</B>|<B>--section-headers</B>|<B>--sections</B>]
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<BR> [<B>-g</B>|<B>--section-groups</B>]
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<BR> [<B>-t</B>|<B>--section-details</B>]
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<BR> [<B>-e</B>|<B>--headers</B>]
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<BR> [<B>-s</B>|<B>--syms</B>|<B>--symbols</B>]
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<BR> [<B>--dyn-syms</B>]
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<BR> [<B>-n</B>|<B>--notes</B>]
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<BR> [<B>-r</B>|<B>--relocs</B>]
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<BR> [<B>-u</B>|<B>--unwind</B>]
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<BR> [<B>-d</B>|<B>--dynamic</B>]
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<BR> [<B>-V</B>|<B>--version-info</B>]
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<BR> [<B>-A</B>|<B>--arch-specific</B>]
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<BR> [<B>-D</B>|<B>--use-dynamic</B>]
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<BR> [<B>-x</B> <number or name>|<B>--hex-dump=</B><number or name>]
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<BR> [<B>-p</B> <number or name>|<B>--string-dump=</B><number or name>]
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<BR> [<B>-R</B> <number or name>|<B>--relocated-dump=</B><number or name>]
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<BR> [<B>-z</B>|<B>--decompress</B>]
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<BR> [<B>-c</B>|<B>--archive-index</B>]
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<BR> [<B>-w[lLiaprmfFsoRtUuTgAckK]</B>|
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<BR> <B>--debug-dump</B>[=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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<BR> [<B>--dwarf-depth=</B><I>n</I>]
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<BR> [<B>--dwarf-start=</B><I>n</I>]
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<BR> [<B>--ctf=</B><I>section</I>]
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<BR> [<B>--ctf-parent=</B><I>section</I>]
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<BR> [<B>--ctf-symbols=</B><I>section</I>]
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<BR> [<B>--ctf-strings=</B><I>section</I>]
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<BR> [<B>-I</B>|<B>--histogram</B>]
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<BR> [<B>-v</B>|<B>--version</B>]
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<BR> [<B>-W</B>|<B>--wide</B>]
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<BR> [<B>-H</B>|<B>--help</B>]
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<BR> <I>elffile</I>...
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>readelf</B> displays information about one or more <FONT SIZE="-1">ELF</FONT> format object
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files. The options control what particular information to display.
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<P>
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<I>elffile</I>... are the object files to be examined. 32-bit and
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64-bit <FONT SIZE="-1">ELF</FONT> files are supported, as are archives containing <FONT SIZE="-1">ELF</FONT> files.
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<P>
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This program performs a similar function to <B>objdump</B> but it
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goes into more detail and it exists independently of the <FONT SIZE="-1">BFD</FONT>
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library, so if there is a bug in <FONT SIZE="-1">BFD</FONT> then readelf will not be
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affected.
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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The long and short forms of options, shown here as alternatives, are
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equivalent. At least one option besides <B>-v</B> or <B>-H</B> must be
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given.
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<DL COMPACT>
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<DT id="1"><B>-a</B><DD>
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<DT id="2"><B>--all</B><DD>
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Equivalent to specifying <B>--file-header</B>,
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<B>--program-headers</B>, <B>--sections</B>, <B>--symbols</B>,
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<B>--relocs</B>, <B>--dynamic</B>, <B>--notes</B>,
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<B>--version-info</B>, <B>--arch-specific</B>, <B>--unwind</B>,
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<B>--section-groups</B> and <B>--histogram</B>.
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<P>
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Note - this option does not enable <B>--use-dynamic</B> 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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<DT id="3"><B>-h</B><DD>
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<DT id="4"><B>--file-header</B><DD>
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Displays the information contained in the <FONT SIZE="-1">ELF</FONT> header at the start of the
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file.
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<DT id="5"><B>-l</B><DD>
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<DT id="6"><B>--program-headers</B><DD>
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<DT id="7"><B>--segments</B><DD>
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Displays the information contained in the file's segment headers, if it
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has any.
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<DT id="8"><B>-S</B><DD>
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<DT id="9"><B>--sections</B><DD>
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<DT id="10"><B>--section-headers</B><DD>
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Displays the information contained in the file's section headers, if it
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has any.
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<DT id="11"><B>-g</B><DD>
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<DT id="12"><B>--section-groups</B><DD>
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Displays the information contained in the file's section groups, if it
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has any.
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<DT id="13"><B>-t</B><DD>
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<DT id="14"><B>--section-details</B><DD>
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Displays the detailed section information. Implies <B>-S</B>.
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<DT id="15"><B>-s</B><DD>
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<DT id="16"><B>--symbols</B><DD>
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<DT id="17"><B>--syms</B><DD>
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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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<B><A HREF="mailto:foo@VER_1">foo@VER_1</A></B>. 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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<B>foo@@VER_2</B>.
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<DT id="18"><B>--dyn-syms</B><DD>
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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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<B>--syms</B> option.
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<DT id="19"><B>-e</B><DD>
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<DT id="20"><B>--headers</B><DD>
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Display all the headers in the file. Equivalent to <B>-h -l -S</B>.
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<DT id="21"><B>-n</B><DD>
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<DT id="22"><B>--notes</B><DD>
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Displays the contents of the <FONT SIZE="-1">NOTE</FONT> segments and/or sections, if any.
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<DT id="23"><B>-r</B><DD>
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<DT id="24"><B>--relocs</B><DD>
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Displays the contents of the file's relocation section, if it has one.
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<DT id="25"><B>-u</B><DD>
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<DT id="26"><B>--unwind</B><DD>
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Displays the contents of the file's unwind section, if it has one. Only
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the unwind sections for <FONT SIZE="-1">IA64 ELF</FONT> files, as well as <FONT SIZE="-1">ARM</FONT> unwind tables
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(<TT>".ARM.exidx"</TT> / <TT>".ARM.extab"</TT>) 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 <I>.eh_frames</I> section using the
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<B>--debug-dump=frames</B> or <B>--debug-dump=frames-interp</B>
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options.
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<DT id="27"><B>-d</B><DD>
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<DT id="28"><B>--dynamic</B><DD>
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Displays the contents of the file's dynamic section, if it has one.
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<DT id="29"><B>-V</B><DD>
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<DT id="30"><B>--version-info</B><DD>
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Displays the contents of the version sections in the file, it they
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exist.
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<DT id="31"><B>-A</B><DD>
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<DT id="32"><B>--arch-specific</B><DD>
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Displays architecture-specific information in the file, if there
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is any.
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<DT id="33"><B>-D</B><DD>
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<DT id="34"><B>--use-dynamic</B><DD>
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When displaying symbols, this option makes <B>readelf</B> 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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When displaying relocations, this option makes <B>readelf</B>
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display the dynamic relocations rather than the static relocations.
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<DT id="35"><B>-x <number or name></B><DD>
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<DT id="36"><B>--hex-dump=<number or name></B><DD>
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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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<DT id="37"><B>-R <number or name></B><DD>
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<DT id="38"><B>--relocated-dump=<number or name></B><DD>
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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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<DT id="39"><B>-p <number or name></B><DD>
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<DT id="40"><B>--string-dump=<number or name></B><DD>
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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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<DT id="41"><B>-z</B><DD>
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<DT id="42"><B>--decompress</B><DD>
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Requests that the section(s) being dumped by <B>x</B>, <B>R</B> or
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<B>p</B> 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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<DT id="43"><B>-c</B><DD>
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<DT id="44"><B>--archive-index</B><DD>
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Displays the file symbol index information contained in the header part
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of binary archives. Performs the same function as the <B>t</B>
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command to <B>ar</B>, but without using the <FONT SIZE="-1">BFD</FONT> library.
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<DT id="45"><B>-w[lLiaprmfFsoRtUuTgAckK]</B><DD>
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<DT id="46"><B>--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]</B><DD>
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Displays the contents of the <FONT SIZE="-1">DWARF</FONT> debug sections in the file, if any
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are present. Compressed debug sections are automatically decompressed
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(temporarily) before they are displayed. If one or more of the
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optional letters or words follows the switch then only those type(s)
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of data will be dumped. The letters and words refer to the following
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information:
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<DL COMPACT><DT id="47"><DD>
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<DL COMPACT>
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<DT id="48">"a"<DD>
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<DT id="49">"=abbrev"<DD>
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Displays the contents of the <B>.debug_abbrev</B> section.
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<DT id="50">"A"<DD>
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<DT id="51">"=addr"<DD>
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Displays the contents of the <B>.debug_addr</B> section.
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<DT id="52">"c"<DD>
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<DT id="53">"=cu_index"<DD>
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Displays the contents of the <B>.debug_cu_index</B> and/or
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<B>.debug_tu_index</B> sections.
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<DT id="54">"f"<DD>
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<DT id="55">"=frames"<DD>
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Display the raw contents of a <B>.debug_frame</B> section.
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<DT id="56">"F"<DD>
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<DT id="57">"=frame-interp"<DD>
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Display the interpreted contents of a <B>.debug_frame</B> section.
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<DT id="58">"g"<DD>
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<DT id="59">"=gdb_index"<DD>
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Displays the contents of the <B>.gdb_index</B> and/or
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<B>.debug_names</B> sections.
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<DT id="60">"i"<DD>
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<DT id="61">"=info"<DD>
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Displays the contents of the <B>.debug_info</B> section. Note: the
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output from this option can also be restricted by the use of the
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<B>--dwarf-depth</B> and <B>--dwarf-start</B> options.
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<DT id="62">"k"<DD>
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<DT id="63">"=links"<DD>
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Displays the contents of the <B>.gnu_debuglink</B> and/or
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<B>.gnu_debugaltlink</B> sections. Also displays any links to
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separate dwarf object files (dwo), if they are specified by the
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DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
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<B>.debug_info</B> section.
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<DT id="64">"K"<DD>
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<DT id="65">"=follow-links"<DD>
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Display the contents of any selected debug sections that are found in
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linked, separate debug info file(s). This can result in multiple
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versions of the same debug section being displayed if it exists in
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more than one file.
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<P>
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In addition, when displaying <FONT SIZE="-1">DWARF</FONT> attributes, if a form is found that
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references the separate debug info file, then the referenced contents
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will also be displayed.
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<DT id="66">"l"<DD>
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<DT id="67">"=rawline"<DD>
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Displays the contents of the <B>.debug_line</B> section in a raw
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format.
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<DT id="68">"L"<DD>
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<DT id="69">"=decodedline"<DD>
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Displays the interpreted contents of the <B>.debug_line</B> section.
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<DT id="70">"m"<DD>
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<DT id="71">"=macro"<DD>
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Displays the contents of the <B>.debug_macro</B> and/or
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<B>.debug_macinfo</B> sections.
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<DT id="72">"o"<DD>
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<DT id="73">"=loc"<DD>
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Displays the contents of the <B>.debug_loc</B> and/or
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<B>.debug_loclists</B> sections.
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<DT id="74">"p"<DD>
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<DT id="75">"=pubnames"<DD>
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Displays the contents of the <B>.debug_pubnames</B> and/or
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<B>.debug_gnu_pubnames</B> sections.
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<DT id="76">"r"<DD>
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<DT id="77">"=aranges"<DD>
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Displays the contents of the <B>.debug_aranges</B> section.
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<DT id="78">"R"<DD>
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<DT id="79">"=Ranges"<DD>
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Displays the contents of the <B>.debug_ranges</B> and/or
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<B>.debug_rnglists</B> sections.
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<DT id="80">"s"<DD>
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<DT id="81">"=str"<DD>
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Displays the contents of the <B>.debug_str</B>, <B>.debug_line_str</B>
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and/or <B>.debug_str_offsets</B> sections.
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<DT id="82">"t"<DD>
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<DT id="83">"=pubtype"<DD>
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Displays the contents of the <B>.debug_pubtypes</B> and/or
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<B>.debug_gnu_pubtypes</B> sections.
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<DT id="84">"T"<DD>
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<DT id="85">"=trace_aranges"<DD>
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Displays the contents of the <B>.trace_aranges</B> section.
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<DT id="86">"u"<DD>
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<DT id="87">"=trace_abbrev"<DD>
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Displays the contents of the <B>.trace_abbrev</B> section.
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<DT id="88">"U"<DD>
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<DT id="89">"=trace_info"<DD>
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Displays the contents of the <B>.trace_info</B> section.
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</DL>
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</DL>
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<DL COMPACT><DT id="90"><DD>
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<P>
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Note: displaying the contents of <B>.debug_static_funcs</B>,
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<B>.debug_static_vars</B> and <B>debug_weaknames</B> sections is not
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currently supported.
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</DL>
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<DT id="91"><B>--dwarf-depth=</B><I>n</I><DD>
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Limit the dump of the <TT>".debug_info"</TT> section to <I>n</I> children.
|
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This is only useful with <B>--debug-dump=info</B>. The default is
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to print all DIEs; the special value 0 for <I>n</I> will also have this
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effect.
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<P>
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With a non-zero value for <I>n</I>, DIEs at or deeper than <I>n</I>
|
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levels will not be printed. The range for <I>n</I> is zero-based.
|
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<DT id="92"><B>--dwarf-start=</B><I>n</I><DD>
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Print only DIEs beginning with the <FONT SIZE="-1">DIE</FONT> numbered <I>n</I>. This is only
|
|
useful with <B>--debug-dump=info</B>.
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<P>
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If specified, this option will suppress printing of any header
|
|
information and all DIEs before the <FONT SIZE="-1">DIE</FONT> numbered <I>n</I>. Only
|
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siblings and children of the specified <FONT SIZE="-1">DIE</FONT> will be printed.
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|
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<P>
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|
|
This can be used in conjunction with <B>--dwarf-depth</B>.
|
|
<DT id="93"><B>--ctf=</B><I>section</I><DD>
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|
|
|
Display the contents of the specified <FONT SIZE="-1">CTF</FONT> section. <FONT SIZE="-1">CTF</FONT> sections themselves
|
|
contain many subsections, all of which are displayed in order.
|
|
<DT id="94"><B>--ctf-parent=</B><I>section</I><DD>
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|
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Specify the name of another section from which the <FONT SIZE="-1">CTF</FONT> dictionary can inherit
|
|
types. (If none is specified, we assume the <FONT SIZE="-1">CTF</FONT> dictionary inherits types
|
|
from the default-named member of the archive contained within this section.)
|
|
<DT id="95"><B>--ctf-symbols=</B><I>section</I><DD>
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|
|
<DT id="96"><B>--ctf-strings=</B><I>section</I><DD>
|
|
|
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|
|
Specify the name of another section from which the <FONT SIZE="-1">CTF</FONT> file can inherit
|
|
strings and symbols. By default, the <TT>".symtab"</TT> and its linked
|
|
string table are used.
|
|
|
|
|
|
<P>
|
|
|
|
|
|
If either of <B>--ctf-symbols</B> or <B>--ctf-strings</B> is specified, the
|
|
other must be specified as well.
|
|
<DT id="97"><B>-I</B><DD>
|
|
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|
|
|
|
|
<DT id="98"><B>--histogram</B><DD>
|
|
|
|
|
|
|
|
Display a histogram of bucket list lengths when displaying the contents
|
|
of the symbol tables.
|
|
<DT id="99"><B>-v</B><DD>
|
|
|
|
|
|
|
|
<DT id="100"><B>--version</B><DD>
|
|
|
|
|
|
|
|
Display the version number of readelf.
|
|
<DT id="101"><B>-W</B><DD>
|
|
|
|
|
|
|
|
<DT id="102"><B>--wide</B><DD>
|
|
|
|
|
|
|
|
Don't break output lines to fit into 80 columns. By default
|
|
<B>readelf</B> breaks section header and segment listing lines for
|
|
64-bit <FONT SIZE="-1">ELF</FONT> files, so that they fit into 80 columns. This option causes
|
|
<B>readelf</B> to print each section header resp. each segment one a
|
|
single line, which is far more readable on terminals wider than 80 columns.
|
|
<DT id="103"><B>-H</B><DD>
|
|
|
|
|
|
|
|
<DT id="104"><B>--help</B><DD>
|
|
|
|
|
|
|
|
Display the command-line options understood by <B>readelf</B>.
|
|
<DT id="105"><B>@</B><I>file</I><DD>
|
|
|
|
|
|
Read command-line options from <I>file</I>. The options read are
|
|
inserted in place of the original @<I>file</I> option. If <I>file</I>
|
|
does not exist, or cannot be read, then the option will be treated
|
|
literally, and not removed.
|
|
|
|
|
|
<P>
|
|
|
|
|
|
Options in <I>file</I> are separated by whitespace. A whitespace
|
|
character may be included in an option by surrounding the entire
|
|
option in either single or double quotes. Any character (including a
|
|
backslash) may be included by prefixing the character to be included
|
|
with a backslash. The <I>file</I> may itself contain additional
|
|
@<I>file</I> options; any such options will be processed recursively.
|
|
</DL>
|
|
<A NAME="lbAF"> </A>
|
|
<H2>SEE ALSO</H2>
|
|
|
|
|
|
|
|
<B><A HREF="/cgi-bin/man/man2html?1+objdump">objdump</A></B>(1), and the Info entries for <I>binutils</I>.
|
|
<A NAME="lbAG"> </A>
|
|
<H2>COPYRIGHT</H2>
|
|
|
|
|
|
|
|
Copyright (c) 1991-2020 Free Software Foundation, Inc.
|
|
<P>
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the <FONT SIZE="-1">GNU</FONT> 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 ``<FONT SIZE="-1">GNU</FONT> Free Documentation License''.
|
|
<P>
|
|
|
|
<HR>
|
|
<A NAME="index"> </A><H2>Index</H2>
|
|
<DL>
|
|
<DT id="106"><A HREF="#lbAB">NAME</A><DD>
|
|
<DT id="107"><A HREF="#lbAC">SYNOPSIS</A><DD>
|
|
<DT id="108"><A HREF="#lbAD">DESCRIPTION</A><DD>
|
|
<DT id="109"><A HREF="#lbAE">OPTIONS</A><DD>
|
|
<DT id="110"><A HREF="#lbAF">SEE ALSO</A><DD>
|
|
<DT id="111"><A HREF="#lbAG">COPYRIGHT</A><DD>
|
|
</DL>
|
|
<HR>
|
|
This document was created by
|
|
<A HREF="/cgi-bin/man/man2html">man2html</A>,
|
|
using the manual pages.<BR>
|
|
Time: 00:05:26 GMT, March 31, 2021
|
|
</BODY>
|
|
</HTML>
|