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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | COPYRIGHT | COLOPHON |
READELF(1) GNU Development Tools READELF(1)
readelf - Displays information about ELF files.
readelf [-a|--all]
[-h|--file-header]
[-l|--program-headers|--segments]
[-S|--section-headers|--sections]
[-g|--section-groups]
[-t|--section-details]
[-e|--headers]
[-s|--syms|--symbols]
[--dyn-syms]
[-n|--notes]
[-r|--relocs]
[-u|--unwind]
[-d|--dynamic]
[-V|--version-info]
[-A|--arch-specific]
[-D|--use-dynamic]
[-x <number or name>|--hex-dump=<number or name>]
[-p <number or name>|--string-dump=<number or name>]
[-R <number or name>|--relocated-dump=<number or name>]
[-z|--decompress]
[-c|--archive-index]
[-w[lLiaprmfFsoRt]|
--debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]]
[--dwarf-depth=n]
[--dwarf-start=n]
[-I|--histogram]
[-v|--version]
[-W|--wide]
[-H|--help]
elffile...
readelf displays information about one or more ELF format object
files. The options control what particular information to display.
elffile... are the object files to be examined. 32-bit and 64-bit
ELF files are supported, as are archives containing ELF files.
This program performs a similar function to objdump but it goes into
more detail and it exists independently of the BFD library, so if
there is a bug in BFD then readelf will not be affected.
The long and short forms of options, shown here as alternatives, are
equivalent. At least one option besides -v or -H must be given.
-a
--all
Equivalent to specifying --file-header, --program-headers,
--sections, --symbols, --relocs, --dynamic, --notes and
--version-info.
-h
--file-header
Displays the information contained in the ELF header at the start
of the file.
-l
--program-headers
--segments
Displays the information contained in the file's segment headers,
if it has any.
-S
--sections
--section-headers
Displays the information contained in the file's section headers,
if it has any.
-g
--section-groups
Displays the information contained in the file's section groups,
if it has any.
-t
--section-details
Displays the detailed section information. Implies -S.
-s
--symbols
--syms
Displays the entries in symbol table section of the file, if it
has one. If a symbol has version information associated with it
then this is displayed as well. The version string is displayed
as a suffix to the symbol name, preceeded by an @ character. For
example foo@VER_1. If the version is the default version to be
used when resolving unversioned references to the symbol then it
is displayed as a suffix preceeded by two @ characters. For
example foo@@VER_2.
--dyn-syms
Displays the entries in dynamic symbol table section of the file,
if it has one. The output format is the same as the format used
by the --syms option.
-e
--headers
Display all the headers in the file. Equivalent to -h -l -S.
-n
--notes
Displays the contents of the NOTE segments and/or sections, if
any.
-r
--relocs
Displays the contents of the file's relocation section, if it has
one.
-u
--unwind
Displays the contents of the file's unwind section, if it has
one. Only the unwind sections for IA64 ELF files, as well as ARM
unwind tables (".ARM.exidx" / ".ARM.extab") are currently
supported.
-d
--dynamic
Displays the contents of the file's dynamic section, if it has
one.
-V
--version-info
Displays the contents of the version sections in the file, it
they exist.
-A
--arch-specific
Displays architecture-specific information in the file, if there
is any.
-D
--use-dynamic
When displaying symbols, this option makes readelf use the symbol
hash tables in the file's dynamic section, rather than the symbol
table sections.
-x <number or name>
--hex-dump=<number or name>
Displays the contents of the indicated section as a hexadecimal
bytes. A number identifies a particular section by index in the
section table; any other string identifies all sections with that
name in the object file.
-R <number or name>
--relocated-dump=<number or name>
Displays the contents of the indicated section as a hexadecimal
bytes. A number identifies a particular section by index in the
section table; any other string identifies all sections with that
name in the object file. The contents of the section will be
relocated before they are displayed.
-p <number or name>
--string-dump=<number or name>
Displays the contents of the indicated section as printable
strings. A number identifies a particular section by index in
the section table; any other string identifies all sections with
that name in the object file.
-z
--decompress
Requests that the section(s) being dumped by x, R or p options
are decompressed before being displayed. If the section(s) are
not compressed then they are displayed as is.
-c
--archive-index
Displays the file symbol index information contained in the
header part of binary archives. Performs the same function as
the t command to ar, but without using the BFD library.
-w[lLiaprmfFsoRt]
--debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]
Displays the contents of the debug sections in the file, if any
are present. If one of the optional letters or words follows the
switch then only data found in those specific sections will be
dumped.
Note that there is no single letter option to display the content
of trace sections or .gdb_index.
Note: the =decodedline option will display the interpreted
contents of a .debug_line section whereas the =rawline option
dumps the contents in a raw format.
Note: the =frames-interp option will display the interpreted
contents of a .debug_frame section whereas the =frames option
dumps the contents in a raw format.
Note: the output from the =info option can also be affected by
the options --dwarf-depth and --dwarf-start.
--dwarf-depth=n
Limit the dump of the ".debug_info" section to n children. This
is only useful with --debug-dump=info. The default is to print
all DIEs; the special value 0 for n will also have this effect.
With a non-zero value for n, DIEs at or deeper than n levels will
not be printed. The range for n is zero-based.
--dwarf-start=n
Print only DIEs beginning with the DIE numbered n. This is only
useful with --debug-dump=info.
If specified, this option will suppress printing of any header
information and all DIEs before the DIE numbered n. Only
siblings and children of the specified DIE will be printed.
This can be used in conjunction with --dwarf-depth.
-I
--histogram
Display a histogram of bucket list lengths when displaying the
contents of the symbol tables.
-v
--version
Display the version number of readelf.
-W
--wide
Don't break output lines to fit into 80 columns. By default
readelf breaks section header and segment listing lines for
64-bit ELF files, so that they fit into 80 columns. This option
causes readelf to print each section header resp. each segment
one a single line, which is far more readable on terminals wider
than 80 columns.
-H
--help
Display the command line options understood by readelf.
@file
Read command-line options from file. The options read are
inserted in place of the original @file option. If file does not
exist, or cannot be read, then the option will be treated
literally, and not removed.
Options in file 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 file may itself
contain additional @file options; any such options will be
processed recursively.
objdump(1), and the Info entries for binutils.
Copyright (c) 1991-2017 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts. A copy of the license is included in the section entitled
"GNU Free Documentation License".
This page is part of the binutils (a collection of tools for working
with executable binaries) project. Information about the project can
be found at ⟨http://www.gnu.org/software/binutils/⟩. If you have a
bug report for this manual page, see
⟨http://sourceware.org/bugzilla/enter_bug.cgi?product=binutils⟩. This
page was obtained from the tarball binutils-2.28.tar.gz fetched from
⟨https://ftp.gnu.org/gnu/binutils/⟩ on 2017-07-05. If you discover
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you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
binutils-2.28 2017-03-02 READELF(1)
Pages that refer to this page: dl_iterate_phdr(3), end(3), elf(5)