readelf(1)



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>]
               [-z|--decompress]
               [-c|--archive-index]
               [-w[lLiaprmfFsoRtUuTgAckK]|
                --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]]
               [--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,
           --version-info, --arch-specific, --unwind, --section-groups and
           --histogram.

           Note - this option does not enable --use-dynamic itself, so if that
           option is not present on the command line then dynamic symbols and
           dynamic relocs will not be displayed.

       -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.

           When displaying relocations, this option makes readelf display the
           dynamic relocations rather than the static relocations.

       -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[lLiaprmfFsoRtUuTgAckK]
       --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]
           Displays the contents of the DWARF debug sections in the file, if
           any are present.  Compressed debug sections are automatically
           decompressed (temporarily) before they are displayed.  If one or
           more of the optional letters or words follows the switch then only
           those type(s) of data will be dumped.  The letters and words refer
           to the following information:

           "a"
           "=abbrev"
               Displays the contents of the .debug_abbrev section.

           "A"
           "=addr"
               Displays the contents of the .debug_addr section.

           "c"
           "=cu_index"
               Displays the contents of the .debug_cu_index and/or
               .debug_tu_index sections.

           "f"
           "=frames"
               Display the raw contents of a .debug_frame section.

           "F"
           "=frame-interp"
               Display the interpreted contents of a .debug_frame section.

           "g"
           "=gdb_index"
               Displays the contents of the .gdb_index and/or .debug_names
               sections.

           "i"
           "=info"
               Displays the contents of the .debug_info section.  Note: the
               output from this option can also be restricted by the use of
               the --dwarf-depth and --dwarf-start options.

           "k"
           "=links"
               Displays the contents of the .gnu_debuglink and/or
               .gnu_debugaltlink sections.  Also displays the link to a
               separate dwarf object file (dwo), if one is specified by the
               DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
               .debug_info section.

           "K"
           "=follow-links"
               Display the contents of any selected debug sections that are
               found in a linked, separate debug info file.  This can result
               in multiple versions of the same debug section being displayed
               if both the main file and the separate debug info file contain
               sections with the same name.

               In addition, when displaying DWARF attributes, if a form is
               found that references the separate debug info file, then the
               referenced contents will also be displayed.

           "l"
           "=rawline"
               Displays the contents of the .debug_line section in a raw
               format.

           "L"
           "=decodedline"
               Displays the interpreted contents of the .debug_line section.

           "m"
           "=macro"
               Displays the contents of the .debug_macro and/or .debug_macinfo
               sections.

           "o"
           "=loc"
               Displays the contents of the .debug_loc and/or .debug_loclists
               sections.

           "p"
           "=pubnames"
               Displays the contents of the .debug_pubnames and/or
               .debug_gnu_pubnames sections.

           "r"
           "=aranges"
               Displays the contents of the .debug_aranges section.

           "R"
           "=Ranges"
               Displays the contents of the .debug_ranges and/or
               .debug_rnglists sections.

           "s"
           "=str"
               Displays the contents of the .debug_str, .debug_line_str and/or
               .debug_str_offsets sections.

           "t"
           "=pubtype"
               Displays the contents of the .debug_pubtypes and/or
               .debug_gnu_pubtypes sections.

           "T"
           "=trace_aranges"
               Displays the contents of the .trace_aranges section.

           "u"
           "=trace_abbrev"
               Displays the contents of the .trace_abbrev section.

           "U"
           "=trace_info"
               Displays the contents of the .trace_info section.

           Note: displaying the contents of .debug_static_funcs,
           .debug_static_vars and debug_weaknames sections is not currently
           supported.

       --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) 1991-2018 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-2.30.90                  2018-07-26                        READELF(1)

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