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>]
               [-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.

       -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) 1991-2015 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".