READELF(1) GNU Development Tools READELF(1)
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]
[-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>]
[-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.
--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.
-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.
-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
objdump(1), and the Info entries for binutils.
COPYRIGHT
Copyright (c) 1991-2014 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".
binutils-2.25 2014-12-23 READELF(1)
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