NAME
readelf - Displays information about ELF files.
SYNOPSIS
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]
[
-f|
--special-files]
[
-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...
DESCRIPTION
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.
OPTIONS
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.
- --dyn-syms
- Displays the entries in dynamic symbol table section of the
file, if it has one.
- -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.
- -f
- --special-files
- Allows processing of non-plain files.
- -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.
SEE ALSO
objdump(1), and the Info entries for
binutils.
COPYRIGHT
Copyright (c) 1991-2016 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".