buildtool/linux/tools/share/info/binutils.info

This is binutils.info, produced by makeinfo version 6.7 from
binutils.texi.

Copyright (C) 1991-2020 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".

INFO-DIR-SECTION Software development
START-INFO-DIR-ENTRY
* Binutils: (binutils).         The GNU binary utilities.
END-INFO-DIR-ENTRY

INFO-DIR-SECTION Individual utilities
START-INFO-DIR-ENTRY
* addr2line: (binutils)addr2line. Convert addresses to file and line.
* ar: (binutils)ar.               Create, modify, and extract from archives.
* c++filt: (binutils)c++filt.	  Filter to demangle encoded C++ symbols.
* cxxfilt: (binutils)c++filt.     MS-DOS name for c++filt.
* dlltool: (binutils)dlltool.	  Create files needed to build and use DLLs.
* nm: (binutils)nm.               List symbols from object files.
* objcopy: (binutils)objcopy.	  Copy and translate object files.
* objdump: (binutils)objdump.     Display information from object files.
* ranlib: (binutils)ranlib.       Generate index to archive contents.
* readelf: (binutils)readelf.	  Display the contents of ELF format files.
* size: (binutils)size.           List section sizes and total size.
* strings: (binutils)strings.     List printable strings from files.
* strip: (binutils)strip.         Discard symbols.
* elfedit: (binutils)elfedit.     Update ELF header and property of ELF files.
* windmc: (binutils)windmc.	  Generator for Windows message resources.
* windres: (binutils)windres.	  Manipulate Windows resources.
END-INFO-DIR-ENTRY


File: binutils.info,  Node: Top,  Next: ar,  Up: (dir)

Introduction
************

This brief manual contains documentation for the GNU binary utilities
(GNU Binutils) version 2.34:

   This document is distributed under the terms of the GNU Free
Documentation License version 1.3.  A copy of the license is included in
the section entitled "GNU Free Documentation License".

* Menu:

* ar::                          Create, modify, and extract from archives
* nm::                          List symbols from object files
* objcopy::			Copy and translate object files
* objdump::                     Display information from object files
* ranlib::                      Generate index to archive contents
* size::                        List section sizes and total size
* strings::                     List printable strings from files
* strip::                       Discard symbols
* c++filt::			Filter to demangle encoded C++ symbols
* cxxfilt: c++filt.             MS-DOS name for c++filt
* addr2line::			Convert addresses to file and line
* windmc::			Generator for Windows message resources
* windres::			Manipulate Windows resources
* dlltool::			Create files needed to build and use DLLs
* readelf::                     Display the contents of ELF format files
* elfedit::                     Update ELF header and property of ELF files
* Common Options::              Command-line options for all utilities
* Selecting the Target System:: How these utilities determine the target
* debuginfod::                  Using binutils with debuginfod
* Reporting Bugs::              Reporting Bugs
* GNU Free Documentation License::  GNU Free Documentation License
* Binutils Index::              Binutils Index


File: binutils.info,  Node: ar,  Next: nm,  Prev: Top,  Up: Top

1 ar
****

     ar [-]P[MOD] [--plugin NAME] [--target BFDNAME] [--output DIRNAME] [RELPOS] [COUNT] ARCHIVE [MEMBER...]
     ar -M [ <mri-script ]

   The GNU 'ar' program creates, modifies, and extracts from archives.
An "archive" is a single file holding a collection of other files in a
structure that makes it possible to retrieve the original individual
files (called "members" of the archive).

   The original files' contents, mode (permissions), timestamp, owner,
and group are preserved in the archive, and can be restored on
extraction.

   GNU 'ar' can maintain archives whose members have names of any
length; however, depending on how 'ar' is configured on your system, a
limit on member-name length may be imposed for compatibility with
archive formats maintained with other tools.  If it exists, the limit is
often 15 characters (typical of formats related to a.out) or 16
characters (typical of formats related to coff).

   'ar' is considered a binary utility because archives of this sort are
most often used as "libraries" holding commonly needed subroutines.

   'ar' creates an index to the symbols defined in relocatable object
modules in the archive when you specify the modifier 's'.  Once created,
this index is updated in the archive whenever 'ar' makes a change to its
contents (save for the 'q' update operation).  An archive with such an
index speeds up linking to the library, and allows routines in the
library to call each other without regard to their placement in the
archive.

   You may use 'nm -s' or 'nm --print-armap' to list this index table.
If an archive lacks the table, another form of 'ar' called 'ranlib' can
be used to add just the table.

   GNU 'ar' can optionally create a _thin_ archive, which contains a
symbol index and references to the original copies of the member files
of the archive.  This is useful for building libraries for use within a
local build tree, where the relocatable objects are expected to remain
available, and copying the contents of each object would only waste time
and space.

   An archive can either be _thin_ or it can be normal.  It cannot be
both at the same time.  Once an archive is created its format cannot be
changed without first deleting it and then creating a new archive in its
place.

   Thin archives are also _flattened_, so that adding one thin archive
to another thin archive does not nest it, as would happen with a normal
archive.  Instead the elements of the first archive are added
individually to the second archive.

   The paths to the elements of the archive are stored relative to the
archive itself.

   GNU 'ar' is designed to be compatible with two different facilities.
You can control its activity using command-line options, like the
different varieties of 'ar' on Unix systems; or, if you specify the
single command-line option '-M', you can control it with a script
supplied via standard input, like the MRI "librarian" program.

* Menu:

* ar cmdline::                  Controlling 'ar' on the command line
* ar scripts::                  Controlling 'ar' with a script


File: binutils.info,  Node: ar cmdline,  Next: ar scripts,  Up: ar

1.1 Controlling 'ar' on the Command Line
========================================

     ar [-X32_64] [-]P[MOD] [--plugin NAME] [--target BFDNAME] [--output DIRNAME] [RELPOS] [COUNT] ARCHIVE [MEMBER...]

   When you use 'ar' in the Unix style, 'ar' insists on at least two
arguments to execute: one keyletter specifying the _operation_
(optionally accompanied by other keyletters specifying _modifiers_), and
the archive name to act on.

   Most operations can also accept further MEMBER arguments, specifying
particular files to operate on.

   GNU 'ar' allows you to mix the operation code P and modifier flags
MOD in any order, within the first command-line argument.

   If you wish, you may begin the first command-line argument with a
dash.

   The P keyletter specifies what operation to execute; it may be any of
the following, but you must specify only one of them:

'd'
     _Delete_ modules from the archive.  Specify the names of modules to
     be deleted as MEMBER...; the archive is untouched if you specify no
     files to delete.

     If you specify the 'v' modifier, 'ar' lists each module as it is
     deleted.

'm'
     Use this operation to _move_ members in an archive.

     The ordering of members in an archive can make a difference in how
     programs are linked using the library, if a symbol is defined in
     more than one member.

     If no modifiers are used with 'm', any members you name in the
     MEMBER arguments are moved to the _end_ of the archive; you can use
     the 'a', 'b', or 'i' modifiers to move them to a specified place
     instead.

'p'
     _Print_ the specified members of the archive, to the standard
     output file.  If the 'v' modifier is specified, show the member
     name before copying its contents to standard output.

     If you specify no MEMBER arguments, all the files in the archive
     are printed.

'q'
     _Quick append_; Historically, add the files MEMBER... to the end of
     ARCHIVE, without checking for replacement.

     The modifiers 'a', 'b', and 'i' do _not_ affect this operation; new
     members are always placed at the end of the archive.

     The modifier 'v' makes 'ar' list each file as it is appended.

     Since the point of this operation is speed, implementations of 'ar'
     have the option of not updating the archive's symbol table if one
     exists.  Too many different systems however assume that symbol
     tables are always up-to-date, so GNU 'ar' will rebuild the table
     even with a quick append.

     Note - GNU 'ar' treats the command 'qs' as a synonym for 'r' -
     replacing already existing files in the archive and appending new
     ones at the end.

'r'
     Insert the files MEMBER... into ARCHIVE (with _replacement_).  This
     operation differs from 'q' in that any previously existing members
     are deleted if their names match those being added.

     If one of the files named in MEMBER... does not exist, 'ar'
     displays an error message, and leaves undisturbed any existing
     members of the archive matching that name.

     By default, new members are added at the end of the file; but you
     may use one of the modifiers 'a', 'b', or 'i' to request placement
     relative to some existing member.

     The modifier 'v' used with this operation elicits a line of output
     for each file inserted, along with one of the letters 'a' or 'r' to
     indicate whether the file was appended (no old member deleted) or
     replaced.

's'
     Add an index to the archive, or update it if it already exists.
     Note this command is an exception to the rule that there can only
     be one command letter, as it is possible to use it as either a
     command or a modifier.  In either case it does the same thing.

't'
     Display a _table_ listing the contents of ARCHIVE, or those of the
     files listed in MEMBER... that are present in the archive.
     Normally only the member name is shown, but if the modifier 'O' is
     specified, then the corresponding offset of the member is also
     displayed.  Finally, in order to see the modes (permissions),
     timestamp, owner, group, and size the 'v' modifier should be
     included.

     If you do not specify a MEMBER, all files in the archive are
     listed.

     If there is more than one file with the same name (say, 'fie') in
     an archive (say 'b.a'), 'ar t b.a fie' lists only the first
     instance; to see them all, you must ask for a complete listing--in
     our example, 'ar t b.a'.

'x'
     _Extract_ members (named MEMBER) from the archive.  You can use the
     'v' modifier with this operation, to request that 'ar' list each
     name as it extracts it.

     If you do not specify a MEMBER, all files in the archive are
     extracted.

     Files cannot be extracted from a thin archive, and there are
     restrictions on extracting from archives created with 'P': The
     paths must not be absolute, may not contain '..', and any
     subdirectories in the paths must exist.  If it is desired to avoid
     these restrictions then used the '--output' option to specify an
     output directory.

   A number of modifiers (MOD) may immediately follow the P keyletter,
to specify variations on an operation's behavior:

'a'
     Add new files _after_ an existing member of the archive.  If you
     use the modifier 'a', the name of an existing archive member must
     be present as the RELPOS argument, before the ARCHIVE
     specification.

'b'
     Add new files _before_ an existing member of the archive.  If you
     use the modifier 'b', the name of an existing archive member must
     be present as the RELPOS argument, before the ARCHIVE
     specification.  (same as 'i').

'c'
     _Create_ the archive.  The specified ARCHIVE is always created if
     it did not exist, when you request an update.  But a warning is
     issued unless you specify in advance that you expect to create it,
     by using this modifier.

'D'
     Operate in _deterministic_ mode.  When adding files and the archive
     index use zero for UIDs, GIDs, timestamps, and use consistent file
     modes for all files.  When this option is used, if 'ar' is used
     with identical options and identical input files, multiple runs
     will create identical output files regardless of the input files'
     owners, groups, file modes, or modification times.

     If 'binutils' was configured with
     '--enable-deterministic-archives', then this mode is on by default.
     It can be disabled with the 'U' modifier, below.

'f'
     Truncate names in the archive.  GNU 'ar' will normally permit file
     names of any length.  This will cause it to create archives which
     are not compatible with the native 'ar' program on some systems.
     If this is a concern, the 'f' modifier may be used to truncate file
     names when putting them in the archive.

'i'
     Insert new files _before_ an existing member of the archive.  If
     you use the modifier 'i', the name of an existing archive member
     must be present as the RELPOS argument, before the ARCHIVE
     specification.  (same as 'b').

'l'
     This modifier is accepted but not used.

'N'
     Uses the COUNT parameter.  This is used if there are multiple
     entries in the archive with the same name.  Extract or delete
     instance COUNT of the given name from the archive.

'o'
     Preserve the _original_ dates of members when extracting them.  If
     you do not specify this modifier, files extracted from the archive
     are stamped with the time of extraction.

'O'
     Display member offsets inside the archive.  Use together with the
     't' option.

'P'
     Use the full path name when matching or storing names in the
     archive.  Archives created with full path names are not POSIX
     compliant, and thus may not work with tools other than up to date
     GNU tools.  Modifying such archives with GNU 'ar' without using 'P'
     will remove the full path names unless the archive is a thin
     archive.  Note that 'P' may be useful when adding files to a thin
     archive since 'r' without 'P' ignores the path when choosing which
     element to replace.  Thus
          ar rcST archive.a subdir/file1 subdir/file2 file1
     will result in the first 'subdir/file1' being replaced with 'file1'
     from the current directory.  Adding 'P' will prevent this
     replacement.

's'
     Write an object-file index into the archive, or update an existing
     one, even if no other change is made to the archive.  You may use
     this modifier flag either with any operation, or alone.  Running
     'ar s' on an archive is equivalent to running 'ranlib' on it.

'S'
     Do not generate an archive symbol table.  This can speed up
     building a large library in several steps.  The resulting archive
     can not be used with the linker.  In order to build a symbol table,
     you must omit the 'S' modifier on the last execution of 'ar', or
     you must run 'ranlib' on the archive.

'T'
     Make the specified ARCHIVE a _thin_ archive.  If it already exists
     and is a regular archive, the existing members must be present in
     the same directory as ARCHIVE.

'u'
     Normally, 'ar r'... inserts all files listed into the archive.  If
     you would like to insert _only_ those of the files you list that
     are newer than existing members of the same names, use this
     modifier.  The 'u' modifier is allowed only for the operation 'r'
     (replace).  In particular, the combination 'qu' is not allowed,
     since checking the timestamps would lose any speed advantage from
     the operation 'q'.

'U'
     Do _not_ operate in _deterministic_ mode.  This is the inverse of
     the 'D' modifier, above: added files and the archive index will get
     their actual UID, GID, timestamp, and file mode values.

     This is the default unless 'binutils' was configured with
     '--enable-deterministic-archives'.

'v'
     This modifier requests the _verbose_ version of an operation.  Many
     operations display additional information, such as filenames
     processed, when the modifier 'v' is appended.

'V'
     This modifier shows the version number of 'ar'.

   The 'ar' program also supports some command-line options which are
neither modifiers nor actions, but which do change its behaviour in
specific ways:

'--help'
     Displays the list of command-line options supported by 'ar' and
     then exits.

'--version'
     Displays the version information of 'ar' and then exits.

'-X32_64'
     'ar' ignores an initial option spelled '-X32_64', for compatibility
     with AIX. The behaviour produced by this option is the default for
     GNU 'ar'.  'ar' does not support any of the other '-X' options; in
     particular, it does not support '-X32' which is the default for AIX
     'ar'.

'--plugin NAME'
     The optional command-line switch '--plugin NAME' causes 'ar' to
     load the plugin called NAME which adds support for more file
     formats, including object files with link-time optimization
     information.

     This option is only available if the toolchain has been built with
     plugin support enabled.

     If '--plugin' is not provided, but plugin support has been enabled
     then 'ar' iterates over the files in '${libdir}/bfd-plugins' in
     alphabetic order and the first plugin that claims the object in
     question is used.

     Please note that this plugin search directory is _not_ the one used
     by 'ld''s '-plugin' option.  In order to make 'ar' use the linker
     plugin it must be copied into the '${libdir}/bfd-plugins'
     directory.  For GCC based compilations the linker plugin is called
     'liblto_plugin.so.0.0.0'.  For Clang based compilations it is
     called 'LLVMgold.so'.  The GCC plugin is always backwards
     compatible with earlier versions, so it is sufficient to just copy
     the newest one.

'--target TARGET'
     The optional command-line switch '--target BFDNAME' specifies that
     the archive members are in an object code format different from
     your system's default format.  See *Note Target Selection::, for
     more information.

'--output DIRNAME'
     The '--output' option can be used to specify a path to a directory
     into which archive members should be extracted.  If this option is
     not specified then the current directory will be used.

     Note - although the presence of this option does imply a 'x'
     extraction operation that option must still be included on the
     command line.


File: binutils.info,  Node: ar scripts,  Prev: ar cmdline,  Up: ar

1.2 Controlling 'ar' with a Script
==================================

     ar -M [ <SCRIPT ]

   If you use the single command-line option '-M' with 'ar', you can
control its operation with a rudimentary command language.  This form of
'ar' operates interactively if standard input is coming directly from a
terminal.  During interactive use, 'ar' prompts for input (the prompt is
'AR >'), and continues executing even after errors.  If you redirect
standard input to a script file, no prompts are issued, and 'ar'
abandons execution (with a nonzero exit code) on any error.

   The 'ar' command language is _not_ designed to be equivalent to the
command-line options; in fact, it provides somewhat less control over
archives.  The only purpose of the command language is to ease the
transition to GNU 'ar' for developers who already have scripts written
for the MRI "librarian" program.

   The syntax for the 'ar' command language is straightforward:
   * commands are recognized in upper or lower case; for example, 'LIST'
     is the same as 'list'.  In the following descriptions, commands are
     shown in upper case for clarity.

   * a single command may appear on each line; it is the first word on
     the line.

   * empty lines are allowed, and have no effect.

   * comments are allowed; text after either of the characters '*' or
     ';' is ignored.

   * Whenever you use a list of names as part of the argument to an 'ar'
     command, you can separate the individual names with either commas
     or blanks.  Commas are shown in the explanations below, for
     clarity.

   * '+' is used as a line continuation character; if '+' appears at the
     end of a line, the text on the following line is considered part of
     the current command.

   Here are the commands you can use in 'ar' scripts, or when using 'ar'
interactively.  Three of them have special significance:

   'OPEN' or 'CREATE' specify a "current archive", which is a temporary
file required for most of the other commands.

   'SAVE' commits the changes so far specified by the script.  Prior to
'SAVE', commands affect only the temporary copy of the current archive.

'ADDLIB ARCHIVE'
'ADDLIB ARCHIVE (MODULE, MODULE, ... MODULE)'
     Add all the contents of ARCHIVE (or, if specified, each named
     MODULE from ARCHIVE) to the current archive.

     Requires prior use of 'OPEN' or 'CREATE'.

'ADDMOD MEMBER, MEMBER, ... MEMBER'
     Add each named MEMBER as a module in the current archive.

     Requires prior use of 'OPEN' or 'CREATE'.

'CLEAR'
     Discard the contents of the current archive, canceling the effect
     of any operations since the last 'SAVE'.  May be executed (with no
     effect) even if no current archive is specified.

'CREATE ARCHIVE'
     Creates an archive, and makes it the current archive (required for
     many other commands).  The new archive is created with a temporary
     name; it is not actually saved as ARCHIVE until you use 'SAVE'.
     You can overwrite existing archives; similarly, the contents of any
     existing file named ARCHIVE will not be destroyed until 'SAVE'.

'DELETE MODULE, MODULE, ... MODULE'
     Delete each listed MODULE from the current archive; equivalent to
     'ar -d ARCHIVE MODULE ... MODULE'.

     Requires prior use of 'OPEN' or 'CREATE'.

'DIRECTORY ARCHIVE (MODULE, ... MODULE)'
'DIRECTORY ARCHIVE (MODULE, ... MODULE) OUTPUTFILE'
     List each named MODULE present in ARCHIVE.  The separate command
     'VERBOSE' specifies the form of the output: when verbose output is
     off, output is like that of 'ar -t ARCHIVE MODULE...'.  When
     verbose output is on, the listing is like 'ar -tv ARCHIVE
     MODULE...'.

     Output normally goes to the standard output stream; however, if you
     specify OUTPUTFILE as a final argument, 'ar' directs the output to
     that file.

'END'
     Exit from 'ar', with a '0' exit code to indicate successful
     completion.  This command does not save the output file; if you
     have changed the current archive since the last 'SAVE' command,
     those changes are lost.

'EXTRACT MODULE, MODULE, ... MODULE'
     Extract each named MODULE from the current archive, writing them
     into the current directory as separate files.  Equivalent to 'ar -x
     ARCHIVE MODULE...'.

     Requires prior use of 'OPEN' or 'CREATE'.

'LIST'
     Display full contents of the current archive, in "verbose" style
     regardless of the state of 'VERBOSE'.  The effect is like 'ar tv
     ARCHIVE'.  (This single command is a GNU 'ar' enhancement, rather
     than present for MRI compatibility.)

     Requires prior use of 'OPEN' or 'CREATE'.

'OPEN ARCHIVE'
     Opens an existing archive for use as the current archive (required
     for many other commands).  Any changes as the result of subsequent
     commands will not actually affect ARCHIVE until you next use
     'SAVE'.

'REPLACE MODULE, MODULE, ... MODULE'
     In the current archive, replace each existing MODULE (named in the
     'REPLACE' arguments) from files in the current working directory.
     To execute this command without errors, both the file, and the
     module in the current archive, must exist.

     Requires prior use of 'OPEN' or 'CREATE'.

'VERBOSE'
     Toggle an internal flag governing the output from 'DIRECTORY'.
     When the flag is on, 'DIRECTORY' output matches output from 'ar -tv
     '....

'SAVE'
     Commit your changes to the current archive, and actually save it as
     a file with the name specified in the last 'CREATE' or 'OPEN'
     command.

     Requires prior use of 'OPEN' or 'CREATE'.


File: binutils.info,  Node: nm,  Next: objcopy,  Prev: ar,  Up: Top

2 nm
****

     nm [-A|-o|--print-file-name] [-a|--debug-syms]
        [-B|--format=bsd] [-C|--demangle[=STYLE]]
        [-D|--dynamic] [-fFORMAT|--format=FORMAT]
        [-g|--extern-only] [-h|--help]
        [-l|--line-numbers] [--inlines]
        [-n|-v|--numeric-sort]
        [-P|--portability] [-p|--no-sort]
        [-r|--reverse-sort] [-S|--print-size]
        [-s|--print-armap] [-t RADIX|--radix=RADIX]
        [-u|--undefined-only] [-V|--version]
        [-X 32_64] [--defined-only] [--no-demangle]
        [--plugin NAME]
        [--no-recurse-limit|--recurse-limit]]
        [--size-sort] [--special-syms]
        [--synthetic] [--with-symbol-versions] [--target=BFDNAME]
        [OBJFILE...]

   GNU 'nm' lists the symbols from object files OBJFILE....  If no
object files are listed as arguments, 'nm' assumes the file 'a.out'.

   For each symbol, 'nm' shows:

   * The symbol value, in the radix selected by options (see below), or
     hexadecimal by default.

   * The symbol type.  At least the following types are used; others
     are, as well, depending on the object file format.  If lowercase,
     the symbol is usually local; if uppercase, the symbol is global
     (external).  There are however a few lowercase symbols that are
     shown for special global symbols ('u', 'v' and 'w').

     'A'
          The symbol's value is absolute, and will not be changed by
          further linking.

     'B'
     'b'
          The symbol is in the BSS data section.  This section typically
          contains zero-initialized or uninitialized data, although the
          exact behavior is system dependent.

     'C'
          The symbol is common.  Common symbols are uninitialized data.
          When linking, multiple common symbols may appear with the same
          name.  If the symbol is defined anywhere, the common symbols
          are treated as undefined references.  For more details on
          common symbols, see the discussion of -warn-common in *note
          Linker options: (ld.info)Options.

     'D'
     'd'
          The symbol is in the initialized data section.

     'G'
     'g'
          The symbol is in an initialized data section for small
          objects.  Some object file formats permit more efficient
          access to small data objects, such as a global int variable as
          opposed to a large global array.

     'i'
          For PE format files this indicates that the symbol is in a
          section specific to the implementation of DLLs.  For ELF
          format files this indicates that the symbol is an indirect
          function.  This is a GNU extension to the standard set of ELF
          symbol types.  It indicates a symbol which if referenced by a
          relocation does not evaluate to its address, but instead must
          be invoked at runtime.  The runtime execution will then return
          the value to be used in the relocation.

     'I'
          The symbol is an indirect reference to another symbol.

     'N'
          The symbol is a debugging symbol.

     'n'
          The symbol is in the read-only data section.

     'p'
          The symbol is in a stack unwind section.

     'R'
     'r'
          The symbol is in a read only data section.

     'S'
     's'
          The symbol is in an uninitialized or zero-initialized data
          section for small objects.

     'T'
     't'
          The symbol is in the text (code) section.

     'U'
          The symbol is undefined.

     'u'
          The symbol is a unique global symbol.  This is a GNU extension
          to the standard set of ELF symbol bindings.  For such a symbol
          the dynamic linker will make sure that in the entire process
          there is just one symbol with this name and type in use.

     'V'
     'v'
          The symbol is a weak object.  When a weak defined symbol is
          linked with a normal defined symbol, the normal defined symbol
          is used with no error.  When a weak undefined symbol is linked
          and the symbol is not defined, the value of the weak symbol
          becomes zero with no error.  On some systems, uppercase
          indicates that a default value has been specified.

     'W'
     'w'
          The symbol is a weak symbol that has not been specifically
          tagged as a weak object symbol.  When a weak defined symbol is
          linked with a normal defined symbol, the normal defined symbol
          is used with no error.  When a weak undefined symbol is linked
          and the symbol is not defined, the value of the symbol is
          determined in a system-specific manner without error.  On some
          systems, uppercase indicates that a default value has been
          specified.

     '-'
          The symbol is a stabs symbol in an a.out object file.  In this
          case, the next values printed are the stabs other field, the
          stabs desc field, and the stab type.  Stabs symbols are used
          to hold debugging information.

     '?'
          The symbol type is unknown, or object file format specific.

   * The symbol name.

   The long and short forms of options, shown here as alternatives, are
equivalent.

'-A'
'-o'
'--print-file-name'
     Precede each symbol by the name of the input file (or archive
     member) in which it was found, rather than identifying the input
     file once only, before all of its symbols.

'-a'
'--debug-syms'
     Display all symbols, even debugger-only symbols; normally these are
     not listed.

'-B'
     The same as '--format=bsd' (for compatibility with the MIPS 'nm').

'-C'
'--demangle[=STYLE]'
     Decode ("demangle") low-level symbol names into user-level names.
     Besides removing any initial underscore prepended by the system,
     this makes C++ function names readable.  Different compilers have
     different mangling styles.  The optional demangling style argument
     can be used to choose an appropriate demangling style for your
     compiler.  *Note c++filt::, for more information on demangling.

'--no-demangle'
     Do not demangle low-level symbol names.  This is the default.

'--recurse-limit'
'--no-recurse-limit'
'--recursion-limit'
'--no-recursion-limit'
     Enables or disables a limit on the amount of recursion performed
     whilst demangling strings.  Since the name mangling formats allow
     for an inifinite level of recursion it is possible to create
     strings whose decoding will exhaust the amount of stack space
     available on the host machine, triggering a memory fault.  The
     limit tries to prevent this from happening by restricting recursion
     to 2048 levels of nesting.

     The default is for this limit to be enabled, but disabling it may
     be necessary in order to demangle truly complicated names.  Note
     however that if the recursion limit is disabled then stack
     exhaustion is possible and any bug reports about such an event will
     be rejected.

'-D'
'--dynamic'
     Display the dynamic symbols rather than the normal symbols.  This
     is only meaningful for dynamic objects, such as certain types of
     shared libraries.

'-f FORMAT'
'--format=FORMAT'
     Use the output format FORMAT, which can be 'bsd', 'sysv', or
     'posix'.  The default is 'bsd'.  Only the first character of FORMAT
     is significant; it can be either upper or lower case.

'-g'
'--extern-only'
     Display only external symbols.

'-h'
'--help'
     Show a summary of the options to 'nm' and exit.

'-l'
'--line-numbers'
     For each symbol, use debugging information to try to find a
     filename and line number.  For a defined symbol, look for the line
     number of the address of the symbol.  For an undefined symbol, look
     for the line number of a relocation entry which refers to the
     symbol.  If line number information can be found, print it after
     the other symbol information.

'--inlines'
     When option '-l' is active, if the address belongs to a function
     that was inlined, then this option causes the source information
     for all enclosing scopes back to the first non-inlined function to
     be printed as well.  For example, if 'main' inlines 'callee1' which
     inlines 'callee2', and address is from 'callee2', the source
     information for 'callee1' and 'main' will also be printed.

'-n'
'-v'
'--numeric-sort'
     Sort symbols numerically by their addresses, rather than
     alphabetically by their names.

'-p'
'--no-sort'
     Do not bother to sort the symbols in any order; print them in the
     order encountered.

'-P'
'--portability'
     Use the POSIX.2 standard output format instead of the default
     format.  Equivalent to '-f posix'.

'-r'
'--reverse-sort'
     Reverse the order of the sort (whether numeric or alphabetic); let
     the last come first.

'-S'
'--print-size'
     Print both value and size of defined symbols for the 'bsd' output
     style.  This option has no effect for object formats that do not
     record symbol sizes, unless '--size-sort' is also used in which
     case a calculated size is displayed.

'-s'
'--print-armap'
     When listing symbols from archive members, include the index: a
     mapping (stored in the archive by 'ar' or 'ranlib') of which
     modules contain definitions for which names.

'-t RADIX'
'--radix=RADIX'
     Use RADIX as the radix for printing the symbol values.  It must be
     'd' for decimal, 'o' for octal, or 'x' for hexadecimal.

'-u'
'--undefined-only'
     Display only undefined symbols (those external to each object
     file).

'-V'
'--version'
     Show the version number of 'nm' and exit.

'-X'
     This option is ignored for compatibility with the AIX version of
     'nm'.  It takes one parameter which must be the string '32_64'.
     The default mode of AIX 'nm' corresponds to '-X 32', which is not
     supported by GNU 'nm'.

'--defined-only'
     Display only defined symbols for each object file.

'--plugin NAME'
     Load the plugin called NAME to add support for extra target types.
     This option is only available if the toolchain has been built with
     plugin support enabled.

     If '--plugin' is not provided, but plugin support has been enabled
     then 'nm' iterates over the files in '${libdir}/bfd-plugins' in
     alphabetic order and the first plugin that claims the object in
     question is used.

     Please note that this plugin search directory is _not_ the one used
     by 'ld''s '-plugin' option.  In order to make 'nm' use the linker
     plugin it must be copied into the '${libdir}/bfd-plugins'
     directory.  For GCC based compilations the linker plugin is called
     'liblto_plugin.so.0.0.0'.  For Clang based compilations it is
     called 'LLVMgold.so'.  The GCC plugin is always backwards
     compatible with earlier versions, so it is sufficient to just copy
     the newest one.

'--size-sort'
     Sort symbols by size.  For ELF objects symbol sizes are read from
     the ELF, for other object types the symbol sizes are computed as
     the difference between the value of the symbol and the value of the
     symbol with the next higher value.  If the 'bsd' output format is
     used the size of the symbol is printed, rather than the value, and
     '-S' must be used in order both size and value to be printed.

'--special-syms'
     Display symbols which have a target-specific special meaning.
     These symbols are usually used by the target for some special
     processing and are not normally helpful when included in the normal
     symbol lists.  For example for ARM targets this option would skip
     the mapping symbols used to mark transitions between ARM code,
     THUMB code and data.

'--synthetic'
     Include synthetic symbols in the output.  These are special symbols
     created by the linker for various purposes.  They are not shown by
     default since they are not part of the binary's original source
     code.

'--with-symbol-versions'
     Enables the display of symbol version information if any exists.
     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'.

'--target=BFDNAME'
     Specify an object code format other than your system's default
     format.  *Note Target Selection::, for more information.


File: binutils.info,  Node: objcopy,  Next: objdump,  Prev: nm,  Up: Top

3 objcopy
*********

     objcopy [-F BFDNAME|--target=BFDNAME]
             [-I BFDNAME|--input-target=BFDNAME]
             [-O BFDNAME|--output-target=BFDNAME]
             [-B BFDARCH|--binary-architecture=BFDARCH]
             [-S|--strip-all]
             [-g|--strip-debug]
             [--strip-unneeded]
             [-K SYMBOLNAME|--keep-symbol=SYMBOLNAME]
             [-N SYMBOLNAME|--strip-symbol=SYMBOLNAME]
             [--strip-unneeded-symbol=SYMBOLNAME]
             [-G SYMBOLNAME|--keep-global-symbol=SYMBOLNAME]
             [--localize-hidden]
             [-L SYMBOLNAME|--localize-symbol=SYMBOLNAME]
             [--globalize-symbol=SYMBOLNAME]
             [--globalize-symbols=FILENAME]
             [-W SYMBOLNAME|--weaken-symbol=SYMBOLNAME]
             [-w|--wildcard]
             [-x|--discard-all]
             [-X|--discard-locals]
             [-b BYTE|--byte=BYTE]
             [-i [BREADTH]|--interleave[=BREADTH]]
             [--interleave-width=WIDTH]
             [-j SECTIONPATTERN|--only-section=SECTIONPATTERN]
             [-R SECTIONPATTERN|--remove-section=SECTIONPATTERN]
             [--keep-section=SECTIONPATTERN]
             [--remove-relocations=SECTIONPATTERN]
             [-p|--preserve-dates]
             [-D|--enable-deterministic-archives]
             [-U|--disable-deterministic-archives]
             [--debugging]
             [--gap-fill=VAL]
             [--pad-to=ADDRESS]
             [--set-start=VAL]
             [--adjust-start=INCR]
             [--change-addresses=INCR]
             [--change-section-address SECTIONPATTERN{=,+,-}VAL]
             [--change-section-lma SECTIONPATTERN{=,+,-}VAL]
             [--change-section-vma SECTIONPATTERN{=,+,-}VAL]
             [--change-warnings] [--no-change-warnings]
             [--set-section-flags SECTIONPATTERN=FLAGS]
             [--set-section-alignment SECTIONPATTERN=ALIGN]
             [--add-section SECTIONNAME=FILENAME]
             [--dump-section SECTIONNAME=FILENAME]
             [--update-section SECTIONNAME=FILENAME]
             [--rename-section OLDNAME=NEWNAME[,FLAGS]]
             [--long-section-names {enable,disable,keep}]
             [--change-leading-char] [--remove-leading-char]
             [--reverse-bytes=NUM]
             [--srec-len=IVAL] [--srec-forceS3]
             [--redefine-sym OLD=NEW]
             [--redefine-syms=FILENAME]
             [--weaken]
             [--keep-symbols=FILENAME]
             [--strip-symbols=FILENAME]
             [--strip-unneeded-symbols=FILENAME]
             [--keep-global-symbols=FILENAME]
             [--localize-symbols=FILENAME]
             [--weaken-symbols=FILENAME]
             [--add-symbol NAME=[SECTION:]VALUE[,FLAGS]]
             [--alt-machine-code=INDEX]
             [--prefix-symbols=STRING]
             [--prefix-sections=STRING]
             [--prefix-alloc-sections=STRING]
             [--add-gnu-debuglink=PATH-TO-FILE]
             [--keep-file-symbols]
             [--only-keep-debug]
             [--strip-dwo]
             [--extract-dwo]
             [--extract-symbol]
             [--writable-text]
             [--readonly-text]
             [--pure]
             [--impure]
             [--file-alignment=NUM]
             [--heap=SIZE]
             [--image-base=ADDRESS]
             [--section-alignment=NUM]
             [--stack=SIZE]
             [--subsystem=WHICH:MAJOR.MINOR]
             [--compress-debug-sections]
             [--decompress-debug-sections]
             [--elf-stt-common=VAL]
             [--merge-notes]
             [--no-merge-notes]
             [--verilog-data-width=VAL]
             [-v|--verbose]
             [-V|--version]
             [--help] [--info]
             INFILE [OUTFILE]

   The GNU 'objcopy' utility copies the contents of an object file to
another.  'objcopy' uses the GNU BFD Library to read and write the
object files.  It can write the destination object file in a format
different from that of the source object file.  The exact behavior of
'objcopy' is controlled by command-line options.  Note that 'objcopy'
should be able to copy a fully linked file between any two formats.
However, copying a relocatable object file between any two formats may
not work as expected.

   'objcopy' creates temporary files to do its translations and deletes
them afterward.  'objcopy' uses BFD to do all its translation work; it
has access to all the formats described in BFD and thus is able to
recognize most formats without being told explicitly.  *Note BFD:
(ld.info)BFD.

   'objcopy' can be used to generate S-records by using an output target
of 'srec' (e.g., use '-O srec').

   'objcopy' can be used to generate a raw binary file by using an
output target of 'binary' (e.g., use '-O binary').  When 'objcopy'
generates a raw binary file, it will essentially produce a memory dump
of the contents of the input object file.  All symbols and relocation
information will be discarded.  The memory dump will start at the load
address of the lowest section copied into the output file.

   When generating an S-record or a raw binary file, it may be helpful
to use '-S' to remove sections containing debugging information.  In
some cases '-R' will be useful to remove sections which contain
information that is not needed by the binary file.

   Note--'objcopy' is not able to change the endianness of its input
files.  If the input format has an endianness (some formats do not),
'objcopy' can only copy the inputs into file formats that have the same
endianness or which have no endianness (e.g., 'srec').  (However, see
the '--reverse-bytes' option.)

'INFILE'
'OUTFILE'
     The input and output files, respectively.  If you do not specify
     OUTFILE, 'objcopy' creates a temporary file and destructively
     renames the result with the name of INFILE.

'-I BFDNAME'
'--input-target=BFDNAME'
     Consider the source file's object format to be BFDNAME, rather than
     attempting to deduce it.  *Note Target Selection::, for more
     information.

'-O BFDNAME'
'--output-target=BFDNAME'
     Write the output file using the object format BFDNAME.  *Note
     Target Selection::, for more information.

'-F BFDNAME'
'--target=BFDNAME'
     Use BFDNAME as the object format for both the input and the output
     file; i.e., simply transfer data from source to destination with no
     translation.  *Note Target Selection::, for more information.

'-B BFDARCH'
'--binary-architecture=BFDARCH'
     Useful when transforming a architecture-less input file into an
     object file.  In this case the output architecture can be set to
     BFDARCH.  This option will be ignored if the input file has a known
     BFDARCH.  You can access this binary data inside a program by
     referencing the special symbols that are created by the conversion
     process.  These symbols are called _binary_OBJFILE_start,
     _binary_OBJFILE_end and _binary_OBJFILE_size.  e.g.  you can
     transform a picture file into an object file and then access it in
     your code using these symbols.

'-j SECTIONPATTERN'
'--only-section=SECTIONPATTERN'
     Copy only the indicated sections from the input file to the output
     file.  This option may be given more than once.  Note that using
     this option inappropriately may make the output file unusable.
     Wildcard characters are accepted in SECTIONPATTERN.

     If the first character of SECTIONPATTERN is the exclamation point
     (!)  then matching sections will not be copied, even if earlier use
     of '--only-section' on the same command line would otherwise copy
     it.  For example:

            --only-section=.text.* --only-section=!.text.foo

     will copy all sectinos maching '.text.*' but not the section
     '.text.foo'.

'-R SECTIONPATTERN'
'--remove-section=SECTIONPATTERN'
     Remove any section matching SECTIONPATTERN from the output file.
     This option may be given more than once.  Note that using this
     option inappropriately may make the output file unusable.  Wildcard
     characters are accepted in SECTIONPATTERN.  Using both the '-j' and
     '-R' options together results in undefined behaviour.

     If the first character of SECTIONPATTERN is the exclamation point
     (!)  then matching sections will not be removed even if an earlier
     use of '--remove-section' on the same command line would otherwise
     remove it.  For example:

            --remove-section=.text.* --remove-section=!.text.foo

     will remove all sections matching the pattern '.text.*', but will
     not remove the section '.text.foo'.

'--keep-section=SECTIONPATTERN'
     When removing sections from the output file, keep sections that
     match SECTIONPATTERN.

'--remove-relocations=SECTIONPATTERN'
     Remove non-dynamic relocations from the output file for any section
     matching SECTIONPATTERN.  This option may be given more than once.
     Note that using this option inappropriately may make the output
     file unusable, and attempting to remove a dynamic relocation
     section such as '.rela.plt' from an executable or shared library
     with '--remove-relocations=.plt' will not work.  Wildcard
     characters are accepted in SECTIONPATTERN.  For example:

            --remove-relocations=.text.*

     will remove the relocations for all sections matching the pattern
     '.text.*'.

     If the first character of SECTIONPATTERN is the exclamation point
     (!)  then matching sections will not have their relocation removed
     even if an earlier use of '--remove-relocations' on the same
     command line would otherwise cause the relocations to be removed.
     For example:

            --remove-relocations=.text.* --remove-relocations=!.text.foo

     will remove all relocations for sections matching the pattern
     '.text.*', but will not remove relocations for the section
     '.text.foo'.

'-S'
'--strip-all'
     Do not copy relocation and symbol information from the source file.

'-g'
'--strip-debug'
     Do not copy debugging symbols or sections from the source file.

'--strip-unneeded'
     Strip all symbols that are not needed for relocation processing.

'-K SYMBOLNAME'
'--keep-symbol=SYMBOLNAME'
     When stripping symbols, keep symbol SYMBOLNAME even if it would
     normally be stripped.  This option may be given more than once.

'-N SYMBOLNAME'
'--strip-symbol=SYMBOLNAME'
     Do not copy symbol SYMBOLNAME from the source file.  This option
     may be given more than once.

'--strip-unneeded-symbol=SYMBOLNAME'
     Do not copy symbol SYMBOLNAME from the source file unless it is
     needed by a relocation.  This option may be given more than once.

'-G SYMBOLNAME'
'--keep-global-symbol=SYMBOLNAME'
     Keep only symbol SYMBOLNAME global.  Make all other symbols local
     to the file, so that they are not visible externally.  This option
     may be given more than once.  Note: this option cannot be used in
     conjunction with the '--globalize-symbol' or '--globalize-symbols'
     options.

'--localize-hidden'
     In an ELF object, mark all symbols that have hidden or internal
     visibility as local.  This option applies on top of symbol-specific
     localization options such as '-L'.

'-L SYMBOLNAME'
'--localize-symbol=SYMBOLNAME'
     Convert a global or weak symbol called SYMBOLNAME into a local
     symbol, so that it is not visible externally.  This option may be
     given more than once.  Note - unique symbols are not converted.

'-W SYMBOLNAME'
'--weaken-symbol=SYMBOLNAME'
     Make symbol SYMBOLNAME weak.  This option may be given more than
     once.

'--globalize-symbol=SYMBOLNAME'
     Give symbol SYMBOLNAME global scoping so that it is visible outside
     of the file in which it is defined.  This option may be given more
     than once.  Note: this option cannot be used in conjunction with
     the '-G' or '--keep-global-symbol' options.

'-w'
'--wildcard'
     Permit regular expressions in SYMBOLNAMEs used in other command
     line options.  The question mark (?), asterisk (*), backslash (\)
     and square brackets ([]) operators can be used anywhere in the
     symbol name.  If the first character of the symbol name is the
     exclamation point (!)  then the sense of the switch is reversed for
     that symbol.  For example:

            -w -W !foo -W fo*

     would cause objcopy to weaken all symbols that start with "fo"
     except for the symbol "foo".

'-x'
'--discard-all'
     Do not copy non-global symbols from the source file.

'-X'
'--discard-locals'
     Do not copy compiler-generated local symbols.  (These usually start
     with 'L' or '.'.)

'-b BYTE'
'--byte=BYTE'
     If interleaving has been enabled via the '--interleave' option then
     start the range of bytes to keep at the BYTEth byte.  BYTE can be
     in the range from 0 to BREADTH-1, where BREADTH is the value given
     by the '--interleave' option.

'-i [BREADTH]'
'--interleave[=BREADTH]'
     Only copy a range out of every BREADTH bytes.  (Header data is not
     affected).  Select which byte in the range begins the copy with the
     '--byte' option.  Select the width of the range with the
     '--interleave-width' option.

     This option is useful for creating files to program ROM.  It is
     typically used with an 'srec' output target.  Note that 'objcopy'
     will complain if you do not specify the '--byte' option as well.

     The default interleave breadth is 4, so with '--byte' set to 0,
     'objcopy' would copy the first byte out of every four bytes from
     the input to the output.

'--interleave-width=WIDTH'
     When used with the '--interleave' option, copy WIDTH bytes at a
     time.  The start of the range of bytes to be copied is set by the
     '--byte' option, and the extent of the range is set with the
     '--interleave' option.

     The default value for this option is 1.  The value of WIDTH plus
     the BYTE value set by the '--byte' option must not exceed the
     interleave breadth set by the '--interleave' option.

     This option can be used to create images for two 16-bit flashes
     interleaved in a 32-bit bus by passing '-b 0 -i 4
     --interleave-width=2' and '-b 2 -i 4 --interleave-width=2' to two
     'objcopy' commands.  If the input was '12345678' then the outputs
     would be '1256' and '3478' respectively.

'-p'
'--preserve-dates'
     Set the access and modification dates of the output file to be the
     same as those of the input file.

'-D'
'--enable-deterministic-archives'
     Operate in _deterministic_ mode.  When copying archive members and
     writing the archive index, use zero for UIDs, GIDs, timestamps, and
     use consistent file modes for all files.

     If 'binutils' was configured with
     '--enable-deterministic-archives', then this mode is on by default.
     It can be disabled with the '-U' option, below.

'-U'
'--disable-deterministic-archives'
     Do _not_ operate in _deterministic_ mode.  This is the inverse of
     the '-D' option, above: when copying archive members and writing
     the archive index, use their actual UID, GID, timestamp, and file
     mode values.

     This is the default unless 'binutils' was configured with
     '--enable-deterministic-archives'.

'--debugging'
     Convert debugging information, if possible.  This is not the
     default because only certain debugging formats are supported, and
     the conversion process can be time consuming.

'--gap-fill VAL'
     Fill gaps between sections with VAL.  This operation applies to the
     _load address_ (LMA) of the sections.  It is done by increasing the
     size of the section with the lower address, and filling in the
     extra space created with VAL.

'--pad-to ADDRESS'
     Pad the output file up to the load address ADDRESS.  This is done
     by increasing the size of the last section.  The extra space is
     filled in with the value specified by '--gap-fill' (default zero).

'--set-start VAL'
     Set the start address of the new file to VAL.  Not all object file
     formats support setting the start address.

'--change-start INCR'
'--adjust-start INCR'
     Change the start address by adding INCR.  Not all object file
     formats support setting the start address.

'--change-addresses INCR'
'--adjust-vma INCR'
     Change the VMA and LMA addresses of all sections, as well as the
     start address, by adding INCR.  Some object file formats do not
     permit section addresses to be changed arbitrarily.  Note that this
     does not relocate the sections; if the program expects sections to
     be loaded at a certain address, and this option is used to change
     the sections such that they are loaded at a different address, the
     program may fail.

'--change-section-address SECTIONPATTERN{=,+,-}VAL'
'--adjust-section-vma SECTIONPATTERN{=,+,-}VAL'
     Set or change both the VMA address and the LMA address of any
     section matching SECTIONPATTERN.  If '=' is used, the section
     address is set to VAL.  Otherwise, VAL is added to or subtracted
     from the section address.  See the comments under
     '--change-addresses', above.  If SECTIONPATTERN does not match any
     sections in the input file, a warning will be issued, unless
     '--no-change-warnings' is used.

'--change-section-lma SECTIONPATTERN{=,+,-}VAL'
     Set or change the LMA address of any sections matching
     SECTIONPATTERN.  The LMA address is the address where the section
     will be loaded into memory at program load time.  Normally this is
     the same as the VMA address, which is the address of the section at
     program run time, but on some systems, especially those where a
     program is held in ROM, the two can be different.  If '=' is used,
     the section address is set to VAL.  Otherwise, VAL is added to or
     subtracted from the section address.  See the comments under
     '--change-addresses', above.  If SECTIONPATTERN does not match any
     sections in the input file, a warning will be issued, unless
     '--no-change-warnings' is used.

'--change-section-vma SECTIONPATTERN{=,+,-}VAL'
     Set or change the VMA address of any section matching
     SECTIONPATTERN.  The VMA address is the address where the section
     will be located once the program has started executing.  Normally
     this is the same as the LMA address, which is the address where the
     section will be loaded into memory, but on some systems, especially
     those where a program is held in ROM, the two can be different.  If
     '=' is used, the section address is set to VAL.  Otherwise, VAL is
     added to or subtracted from the section address.  See the comments
     under '--change-addresses', above.  If SECTIONPATTERN does not
     match any sections in the input file, a warning will be issued,
     unless '--no-change-warnings' is used.

'--change-warnings'
'--adjust-warnings'
     If '--change-section-address' or '--change-section-lma' or
     '--change-section-vma' is used, and the section pattern does not
     match any sections, issue a warning.  This is the default.

'--no-change-warnings'
'--no-adjust-warnings'
     Do not issue a warning if '--change-section-address' or
     '--adjust-section-lma' or '--adjust-section-vma' is used, even if
     the section pattern does not match any sections.

'--set-section-flags SECTIONPATTERN=FLAGS'
     Set the flags for any sections matching SECTIONPATTERN.  The FLAGS
     argument is a comma separated string of flag names.  The recognized
     names are 'alloc', 'contents', 'load', 'noload', 'readonly',
     'code', 'data', 'rom', 'share', and 'debug'.  You can set the
     'contents' flag for a section which does not have contents, but it
     is not meaningful to clear the 'contents' flag of a section which
     does have contents-just remove the section instead.  Not all flags
     are meaningful for all object file formats.

'--set-section-alignment SECTIONPATTERN=ALIGN'
     Set the alignment for any sections matching SECTIONPATTERN.  ALIGN
     specifies the alignment in bytes and must be a power of two, i.e.
     1, 2, 4, 8....

'--add-section SECTIONNAME=FILENAME'
     Add a new section named SECTIONNAME while copying the file.  The
     contents of the new section are taken from the file FILENAME.  The
     size of the section will be the size of the file.  This option only
     works on file formats which can support sections with arbitrary
     names.  Note - it may be necessary to use the '--set-section-flags'
     option to set the attributes of the newly created section.

'--dump-section SECTIONNAME=FILENAME'
     Place the contents of section named SECTIONNAME into the file
     FILENAME, overwriting any contents that may have been there
     previously.  This option is the inverse of '--add-section'.  This
     option is similar to the '--only-section' option except that it
     does not create a formatted file, it just dumps the contents as raw
     binary data, without applying any relocations.  The option can be
     specified more than once.

'--update-section SECTIONNAME=FILENAME'
     Replace the existing contents of a section named SECTIONNAME with
     the contents of file FILENAME.  The size of the section will be
     adjusted to the size of the file.  The section flags for
     SECTIONNAME will be unchanged.  For ELF format files the section to
     segment mapping will also remain unchanged, something which is not
     possible using '--remove-section' followed by '--add-section'.  The
     option can be specified more than once.

     Note - it is possible to use '--rename-section' and
     '--update-section' to both update and rename a section from one
     command line.  In this case, pass the original section name to
     '--update-section', and the original and new section names to
     '--rename-section'.

'--add-symbol NAME=[SECTION:]VALUE[,FLAGS]'
     Add a new symbol named NAME while copying the file.  This option
     may be specified multiple times.  If the SECTION is given, the
     symbol will be associated with and relative to that section,
     otherwise it will be an ABS symbol.  Specifying an undefined
     section will result in a fatal error.  There is no check for the
     value, it will be taken as specified.  Symbol flags can be
     specified and not all flags will be meaningful for all object file
     formats.  By default, the symbol will be global.  The special flag
     'before=OTHERSYM' will insert the new symbol in front of the
     specified OTHERSYM, otherwise the symbol(s) will be added at the
     end of the symbol table in the order they appear.

'--rename-section OLDNAME=NEWNAME[,FLAGS]'
     Rename a section from OLDNAME to NEWNAME, optionally changing the
     section's flags to FLAGS in the process.  This has the advantage
     over using a linker script to perform the rename in that the output
     stays as an object file and does not become a linked executable.

     This option is particularly helpful when the input format is
     binary, since this will always create a section called .data.  If
     for example, you wanted instead to create a section called .rodata
     containing binary data you could use the following command line to
     achieve it:

            objcopy -I binary -O <output_format> -B <architecture> \
             --rename-section .data=.rodata,alloc,load,readonly,data,contents \
             <input_binary_file> <output_object_file>

'--long-section-names {enable,disable,keep}'
     Controls the handling of long section names when processing 'COFF'
     and 'PE-COFF' object formats.  The default behaviour, 'keep', is to
     preserve long section names if any are present in the input file.
     The 'enable' and 'disable' options forcibly enable or disable the
     use of long section names in the output object; when 'disable' is
     in effect, any long section names in the input object will be
     truncated.  The 'enable' option will only emit long section names
     if any are present in the inputs; this is mostly the same as
     'keep', but it is left undefined whether the 'enable' option might
     force the creation of an empty string table in the output file.

'--change-leading-char'
     Some object file formats use special characters at the start of
     symbols.  The most common such character is underscore, which
     compilers often add before every symbol.  This option tells
     'objcopy' to change the leading character of every symbol when it
     converts between object file formats.  If the object file formats
     use the same leading character, this option has no effect.
     Otherwise, it will add a character, or remove a character, or
     change a character, as appropriate.

'--remove-leading-char'
     If the first character of a global symbol is a special symbol
     leading character used by the object file format, remove the
     character.  The most common symbol leading character is underscore.
     This option will remove a leading underscore from all global
     symbols.  This can be useful if you want to link together objects
     of different file formats with different conventions for symbol
     names.  This is different from '--change-leading-char' because it
     always changes the symbol name when appropriate, regardless of the
     object file format of the output file.

'--reverse-bytes=NUM'
     Reverse the bytes in a section with output contents.  A section
     length must be evenly divisible by the value given in order for the
     swap to be able to take place.  Reversing takes place before the
     interleaving is performed.

     This option is used typically in generating ROM images for
     problematic target systems.  For example, on some target boards,
     the 32-bit words fetched from 8-bit ROMs are re-assembled in
     little-endian byte order regardless of the CPU byte order.
     Depending on the programming model, the endianness of the ROM may
     need to be modified.

     Consider a simple file with a section containing the following
     eight bytes: '12345678'.

     Using '--reverse-bytes=2' for the above example, the bytes in the
     output file would be ordered '21436587'.

     Using '--reverse-bytes=4' for the above example, the bytes in the
     output file would be ordered '43218765'.

     By using '--reverse-bytes=2' for the above example, followed by
     '--reverse-bytes=4' on the output file, the bytes in the second
     output file would be ordered '34127856'.

'--srec-len=IVAL'
     Meaningful only for srec output.  Set the maximum length of the
     Srecords being produced to IVAL.  This length covers both address,
     data and crc fields.

'--srec-forceS3'
     Meaningful only for srec output.  Avoid generation of S1/S2
     records, creating S3-only record format.

'--redefine-sym OLD=NEW'
     Change the name of a symbol OLD, to NEW.  This can be useful when
     one is trying link two things together for which you have no
     source, and there are name collisions.

'--redefine-syms=FILENAME'
     Apply '--redefine-sym' to each symbol pair "OLD NEW" listed in the
     file FILENAME.  FILENAME is simply a flat file, with one symbol
     pair per line.  Line comments may be introduced by the hash
     character.  This option may be given more than once.

'--weaken'
     Change all global symbols in the file to be weak.  This can be
     useful when building an object which will be linked against other
     objects using the '-R' option to the linker.  This option is only
     effective when using an object file format which supports weak
     symbols.

'--keep-symbols=FILENAME'
     Apply '--keep-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name per
     line.  Line comments may be introduced by the hash character.  This
     option may be given more than once.

'--strip-symbols=FILENAME'
     Apply '--strip-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name per
     line.  Line comments may be introduced by the hash character.  This
     option may be given more than once.

'--strip-unneeded-symbols=FILENAME'
     Apply '--strip-unneeded-symbol' option to each symbol listed in the
     file FILENAME.  FILENAME is simply a flat file, with one symbol
     name per line.  Line comments may be introduced by the hash
     character.  This option may be given more than once.

'--keep-global-symbols=FILENAME'
     Apply '--keep-global-symbol' option to each symbol listed in the
     file FILENAME.  FILENAME is simply a flat file, with one symbol
     name per line.  Line comments may be introduced by the hash
     character.  This option may be given more than once.

'--localize-symbols=FILENAME'
     Apply '--localize-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name per
     line.  Line comments may be introduced by the hash character.  This
     option may be given more than once.

'--globalize-symbols=FILENAME'
     Apply '--globalize-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name per
     line.  Line comments may be introduced by the hash character.  This
     option may be given more than once.  Note: this option cannot be
     used in conjunction with the '-G' or '--keep-global-symbol'
     options.

'--weaken-symbols=FILENAME'
     Apply '--weaken-symbol' option to each symbol listed in the file
     FILENAME.  FILENAME is simply a flat file, with one symbol name per
     line.  Line comments may be introduced by the hash character.  This
     option may be given more than once.

'--alt-machine-code=INDEX'
     If the output architecture has alternate machine codes, use the
     INDEXth code instead of the default one.  This is useful in case a
     machine is assigned an official code and the tool-chain adopts the
     new code, but other applications still depend on the original code
     being used.  For ELF based architectures if the INDEX alternative
     does not exist then the value is treated as an absolute number to
     be stored in the e_machine field of the ELF header.

'--writable-text'
     Mark the output text as writable.  This option isn't meaningful for
     all object file formats.

'--readonly-text'
     Make the output text write protected.  This option isn't meaningful
     for all object file formats.

'--pure'
     Mark the output file as demand paged.  This option isn't meaningful
     for all object file formats.

'--impure'
     Mark the output file as impure.  This option isn't meaningful for
     all object file formats.

'--prefix-symbols=STRING'
     Prefix all symbols in the output file with STRING.

'--prefix-sections=STRING'
     Prefix all section names in the output file with STRING.

'--prefix-alloc-sections=STRING'
     Prefix all the names of all allocated sections in the output file
     with STRING.

'--add-gnu-debuglink=PATH-TO-FILE'
     Creates a .gnu_debuglink section which contains a reference to
     PATH-TO-FILE and adds it to the output file.  Note: the file at
     PATH-TO-FILE must exist.  Part of the process of adding the
     .gnu_debuglink section involves embedding a checksum of the
     contents of the debug info file into the section.

     If the debug info file is built in one location but it is going to
     be installed at a later time into a different location then do not
     use the path to the installed location.  The '--add-gnu-debuglink'
     option will fail because the installed file does not exist yet.
     Instead put the debug info file in the current directory and use
     the '--add-gnu-debuglink' option without any directory components,
     like this:

           objcopy --add-gnu-debuglink=foo.debug

     At debug time the debugger will attempt to look for the separate
     debug info file in a set of known locations.  The exact set of
     these locations varies depending upon the distribution being used,
     but it typically includes:

     '* The same directory as the executable.'

     '* A sub-directory of the directory containing the executable'
          called .debug

     '* A global debug directory such as /usr/lib/debug.'

     As long as the debug info file has been installed into one of these
     locations before the debugger is run everything should work
     correctly.

'--keep-file-symbols'
     When stripping a file, perhaps with '--strip-debug' or
     '--strip-unneeded', retain any symbols specifying source file
     names, which would otherwise get stripped.

'--only-keep-debug'
     Strip a file, removing contents of any sections that would not be
     stripped by '--strip-debug' and leaving the debugging sections
     intact.  In ELF files, this preserves all note sections in the
     output.

     Note - the section headers of the stripped sections are preserved,
     including their sizes, but the contents of the section are
     discarded.  The section headers are preserved so that other tools
     can match up the debuginfo file with the real executable, even if
     that executable has been relocated to a different address space.

     The intention is that this option will be used in conjunction with
     '--add-gnu-debuglink' to create a two part executable.  One a
     stripped binary which will occupy less space in RAM and in a
     distribution and the second a debugging information file which is
     only needed if debugging abilities are required.  The suggested
     procedure to create these files is as follows:

       1. Link the executable as normal.  Assuming that it is called
          'foo' then...
       2. Run 'objcopy --only-keep-debug foo foo.dbg' to create a file
          containing the debugging info.
       3. Run 'objcopy --strip-debug foo' to create a stripped
          executable.
       4. Run 'objcopy --add-gnu-debuglink=foo.dbg foo' to add a link to
          the debugging info into the stripped executable.

     Note--the choice of '.dbg' as an extension for the debug info file
     is arbitrary.  Also the '--only-keep-debug' step is optional.  You
     could instead do this:

       1. Link the executable as normal.
       2. Copy 'foo' to 'foo.full'
       3. Run 'objcopy --strip-debug foo'
       4. Run 'objcopy --add-gnu-debuglink=foo.full foo'

     i.e., the file pointed to by the '--add-gnu-debuglink' can be the
     full executable.  It does not have to be a file created by the
     '--only-keep-debug' switch.

     Note--this switch is only intended for use on fully linked files.
     It does not make sense to use it on object files where the
     debugging information may be incomplete.  Besides the gnu_debuglink
     feature currently only supports the presence of one filename
     containing debugging information, not multiple filenames on a
     one-per-object-file basis.

'--strip-dwo'
     Remove the contents of all DWARF .dwo sections, leaving the
     remaining debugging sections and all symbols intact.  This option
     is intended for use by the compiler as part of the '-gsplit-dwarf'
     option, which splits debug information between the .o file and a
     separate .dwo file.  The compiler generates all debug information
     in the same file, then uses the '--extract-dwo' option to copy the
     .dwo sections to the .dwo file, then the '--strip-dwo' option to
     remove those sections from the original .o file.

'--extract-dwo'
     Extract the contents of all DWARF .dwo sections.  See the
     '--strip-dwo' option for more information.

'--file-alignment NUM'
     Specify the file alignment.  Sections in the file will always begin
     at file offsets which are multiples of this number.  This defaults
     to 512.  [This option is specific to PE targets.]

'--heap RESERVE'
'--heap RESERVE,COMMIT'
     Specify the number of bytes of memory to reserve (and optionally
     commit) to be used as heap for this program.  [This option is
     specific to PE targets.]

'--image-base VALUE'
     Use VALUE as the base address of your program or dll.  This is the
     lowest memory location that will be used when your program or dll
     is loaded.  To reduce the need to relocate and improve performance
     of your dlls, each should have a unique base address and not
     overlap any other dlls.  The default is 0x400000 for executables,
     and 0x10000000 for dlls.  [This option is specific to PE targets.]

'--section-alignment NUM'
     Sets the section alignment field in the PE header.  Sections in
     memory will always begin at addresses which are a multiple of this
     number.  Defaults to 0x1000.  [This option is specific to PE
     targets.]

'--stack RESERVE'
'--stack RESERVE,COMMIT'
     Specify the number of bytes of memory to reserve (and optionally
     commit) to be used as stack for this program.  [This option is
     specific to PE targets.]

'--subsystem WHICH'
'--subsystem WHICH:MAJOR'
'--subsystem WHICH:MAJOR.MINOR'
     Specifies the subsystem under which your program will execute.  The
     legal values for WHICH are 'native', 'windows', 'console', 'posix',
     'efi-app', 'efi-bsd', 'efi-rtd', 'sal-rtd', and 'xbox'.  You may
     optionally set the subsystem version also.  Numeric values are also
     accepted for WHICH.  [This option is specific to PE targets.]

'--extract-symbol'
     Keep the file's section flags and symbols but remove all section
     data.  Specifically, the option:

        * removes the contents of all sections;
        * sets the size of every section to zero; and
        * sets the file's start address to zero.

     This option is used to build a '.sym' file for a VxWorks kernel.
     It can also be a useful way of reducing the size of a
     '--just-symbols' linker input file.

'--compress-debug-sections'
     Compress DWARF debug sections using zlib with SHF_COMPRESSED from
     the ELF ABI. Note - if compression would actually make a section
     _larger_, then it is not compressed.

'--compress-debug-sections=none'
'--compress-debug-sections=zlib'
'--compress-debug-sections=zlib-gnu'
'--compress-debug-sections=zlib-gabi'
     For ELF files, these options control how DWARF debug sections are
     compressed.  '--compress-debug-sections=none' is equivalent to
     '--decompress-debug-sections'.  '--compress-debug-sections=zlib'
     and '--compress-debug-sections=zlib-gabi' are equivalent to
     '--compress-debug-sections'.  '--compress-debug-sections=zlib-gnu'
     compresses DWARF debug sections using zlib.  The debug sections are
     renamed to begin with '.zdebug' instead of '.debug'.  Note - if
     compression would actually make a section _larger_, then it is not
     compressed nor renamed.

'--decompress-debug-sections'
     Decompress DWARF debug sections using zlib.  The original section
     names of the compressed sections are restored.

'--elf-stt-common=yes'
'--elf-stt-common=no'
     For ELF files, these options control whether common symbols should
     be converted to the 'STT_COMMON' or 'STT_OBJECT' type.
     '--elf-stt-common=yes' converts common symbol type to 'STT_COMMON'.
     '--elf-stt-common=no' converts common symbol type to 'STT_OBJECT'.

'--merge-notes'
'--no-merge-notes'
     For ELF files, attempt (or do not attempt) to reduce the size of
     any SHT_NOTE type sections by removing duplicate notes.

'-V'
'--version'
     Show the version number of 'objcopy'.

'--verilog-data-width=BYTES'
     For Verilog output, this options controls the number of bytes
     converted for each output data element.  The input target controls
     the endianness of the conversion.

'-v'
'--verbose'
     Verbose output: list all object files modified.  In the case of
     archives, 'objcopy -V' lists all members of the archive.

'--help'
     Show a summary of the options to 'objcopy'.

'--info'
     Display a list showing all architectures and object formats
     available.


File: binutils.info,  Node: objdump,  Next: ranlib,  Prev: objcopy,  Up: Top

4 objdump
*********

     objdump [-a|--archive-headers]
             [-b BFDNAME|--target=BFDNAME]
             [-C|--demangle[=STYLE] ]
             [-d|--disassemble[=SYMBOL]]
             [-D|--disassemble-all]
             [-z|--disassemble-zeroes]
             [-EB|-EL|--endian={big | little }]
             [-f|--file-headers]
             [-F|--file-offsets]
             [--file-start-context]
             [-g|--debugging]
             [-e|--debugging-tags]
             [-h|--section-headers|--headers]
             [-i|--info]
             [-j SECTION|--section=SECTION]
             [-l|--line-numbers]
             [-S|--source]
             [--source-comment[=TEXT]]
             [-m MACHINE|--architecture=MACHINE]
             [-M OPTIONS|--disassembler-options=OPTIONS]
             [-p|--private-headers]
             [-P OPTIONS|--private=OPTIONS]
             [-r|--reloc]
             [-R|--dynamic-reloc]
             [-s|--full-contents]
             [-W[lLiaprmfFsoRtUuTgAckK]|
              --dwarf[=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]]
             [--ctf=SECTION]
             [-G|--stabs]
             [-t|--syms]
             [-T|--dynamic-syms]
             [-x|--all-headers]
             [-w|--wide]
             [--start-address=ADDRESS]
             [--stop-address=ADDRESS]
             [--prefix-addresses]
             [--[no-]show-raw-insn]
             [--adjust-vma=OFFSET]
             [--dwarf-depth=N]
             [--dwarf-start=N]
             [--ctf-parent=SECTION]
             [--no-recurse-limit|--recurse-limit]
             [--special-syms]
             [--prefix=PREFIX]
             [--prefix-strip=LEVEL]
             [--insn-width=WIDTH]
             [--visualize-jumps[=color|=extended-color|=off]
             [-V|--version]
             [-H|--help]
             OBJFILE...

   'objdump' displays information about one or more object files.  The
options control what particular information to display.  This
information is mostly useful to programmers who are working on the
compilation tools, as opposed to programmers who just want their program
to compile and work.

   OBJFILE... are the object files to be examined.  When you specify
archives, 'objdump' shows information on each of the member object
files.

   The long and short forms of options, shown here as alternatives, are
equivalent.  At least one option from the list
'-a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-P,-r,-R,-s,-S,-t,-T,-V,-x' must be
given.

'-a'
'--archive-header'
     If any of the OBJFILE files are archives, display the archive
     header information (in a format similar to 'ls -l').  Besides the
     information you could list with 'ar tv', 'objdump -a' shows the
     object file format of each archive member.

'--adjust-vma=OFFSET'
     When dumping information, first add OFFSET to all the section
     addresses.  This is useful if the section addresses do not
     correspond to the symbol table, which can happen when putting
     sections at particular addresses when using a format which can not
     represent section addresses, such as a.out.

'-b BFDNAME'
'--target=BFDNAME'
     Specify that the object-code format for the object files is
     BFDNAME.  This option may not be necessary; OBJDUMP can
     automatically recognize many formats.

     For example,
          objdump -b oasys -m vax -h fu.o
     displays summary information from the section headers ('-h') of
     'fu.o', which is explicitly identified ('-m') as a VAX object file
     in the format produced by Oasys compilers.  You can list the
     formats available with the '-i' option.  *Note Target Selection::,
     for more information.

'-C'
'--demangle[=STYLE]'
     Decode ("demangle") low-level symbol names into user-level names.
     Besides removing any initial underscore prepended by the system,
     this makes C++ function names readable.  Different compilers have
     different mangling styles.  The optional demangling style argument
     can be used to choose an appropriate demangling style for your
     compiler.  *Note c++filt::, for more information on demangling.

'--recurse-limit'
'--no-recurse-limit'
'--recursion-limit'
'--no-recursion-limit'
     Enables or disables a limit on the amount of recursion performed
     whilst demangling strings.  Since the name mangling formats allow
     for an inifinite level of recursion it is possible to create
     strings whose decoding will exhaust the amount of stack space
     available on the host machine, triggering a memory fault.  The
     limit tries to prevent this from happening by restricting recursion
     to 2048 levels of nesting.

     The default is for this limit to be enabled, but disabling it may
     be necessary in order to demangle truly complicated names.  Note
     however that if the recursion limit is disabled then stack
     exhaustion is possible and any bug reports about such an event will
     be rejected.

'-g'
'--debugging'
     Display debugging information.  This attempts to parse STABS
     debugging format information stored in the file and print it out
     using a C like syntax.  If no STABS debuging was found this option
     falls back on the '-W' option to print any DWARF information in the
     file.

'-e'
'--debugging-tags'
     Like '-g', but the information is generated in a format compatible
     with ctags tool.

'-d'
'--disassemble'
'--disassemble=SYMBOL'
     Display the assembler mnemonics for the machine instructions from
     the input file.  This option only disassembles those sections which
     are expected to contain instructions.  If the optional SYMBOL
     argument is given, then display the assembler mnemonics starting at
     SYMBOL.  If SYMBOL is a function name then disassembly will stop at
     the end of the function, otherwise it will stop when the next
     symbol is encountered.  If there are no matches for SYMBOL then
     nothing will be displayed.

     Note if the '--dwarf=follow-links' option has also been enabled
     then any symbol tables in linked debug info files will be read in
     and used when disassembling.

'-D'
'--disassemble-all'
     Like '-d', but disassemble the contents of all sections, not just
     those expected to contain instructions.

     This option also has a subtle effect on the disassembly of
     instructions in code sections.  When option '-d' is in effect
     objdump will assume that any symbols present in a code section
     occur on the boundary between instructions and it will refuse to
     disassemble across such a boundary.  When option '-D' is in effect
     however this assumption is supressed.  This means that it is
     possible for the output of '-d' and '-D' to differ if, for example,
     data is stored in code sections.

     If the target is an ARM architecture this switch also has the
     effect of forcing the disassembler to decode pieces of data found
     in code sections as if they were instructions.

     Note if the '--dwarf=follow-links' option has also been enabled
     then any symbol tables in linked debug info files will be read in
     and used when disassembling.

'--prefix-addresses'
     When disassembling, print the complete address on each line.  This
     is the older disassembly format.

'-EB'
'-EL'
'--endian={big|little}'
     Specify the endianness of the object files.  This only affects
     disassembly.  This can be useful when disassembling a file format
     which does not describe endianness information, such as S-records.

'-f'
'--file-headers'
     Display summary information from the overall header of each of the
     OBJFILE files.

'-F'
'--file-offsets'
     When disassembling sections, whenever a symbol is displayed, also
     display the file offset of the region of data that is about to be
     dumped.  If zeroes are being skipped, then when disassembly
     resumes, tell the user how many zeroes were skipped and the file
     offset of the location from where the disassembly resumes.  When
     dumping sections, display the file offset of the location from
     where the dump starts.

'--file-start-context'
     Specify that when displaying interlisted source code/disassembly
     (assumes '-S') from a file that has not yet been displayed, extend
     the context to the start of the file.

'-h'
'--section-headers'
'--headers'
     Display summary information from the section headers of the object
     file.

     File segments may be relocated to nonstandard addresses, for
     example by using the '-Ttext', '-Tdata', or '-Tbss' options to
     'ld'.  However, some object file formats, such as a.out, do not
     store the starting address of the file segments.  In those
     situations, although 'ld' relocates the sections correctly, using
     'objdump -h' to list the file section headers cannot show the
     correct addresses.  Instead, it shows the usual addresses, which
     are implicit for the target.

     Note, in some cases it is possible for a section to have both the
     READONLY and the NOREAD attributes set.  In such cases the NOREAD
     attribute takes precedence, but 'objdump' will report both since
     the exact setting of the flag bits might be important.

'-H'
'--help'
     Print a summary of the options to 'objdump' and exit.

'-i'
'--info'
     Display a list showing all architectures and object formats
     available for specification with '-b' or '-m'.

'-j NAME'
'--section=NAME'
     Display information only for section NAME.

'-l'
'--line-numbers'
     Label the display (using debugging information) with the filename
     and source line numbers corresponding to the object code or relocs
     shown.  Only useful with '-d', '-D', or '-r'.

'-m MACHINE'
'--architecture=MACHINE'
     Specify the architecture to use when disassembling object files.
     This can be useful when disassembling object files which do not
     describe architecture information, such as S-records.  You can list
     the available architectures with the '-i' option.

     If the target is an ARM architecture then this switch has an
     additional effect.  It restricts the disassembly to only those
     instructions supported by the architecture specified by MACHINE.
     If it is necessary to use this switch because the input file does
     not contain any architecture information, but it is also desired to
     disassemble all the instructions use '-marm'.

'-M OPTIONS'
'--disassembler-options=OPTIONS'
     Pass target specific information to the disassembler.  Only
     supported on some targets.  If it is necessary to specify more than
     one disassembler option then multiple '-M' options can be used or
     can be placed together into a comma separated list.

     For ARC, 'dsp' controls the printing of DSP instructions, 'spfp'
     selects the printing of FPX single precision FP instructions,
     'dpfp' selects the printing of FPX double precision FP
     instructions, 'quarkse_em' selects the printing of special
     QuarkSE-EM instructions, 'fpuda' selects the printing of double
     precision assist instructions, 'fpus' selects the printing of FPU
     single precision FP instructions, while 'fpud' selects the printing
     of FPU double precision FP instructions.  Additionally, one can
     choose to have all the immediates printed in hexadecimal using
     'hex'.  By default, the short immediates are printed using the
     decimal representation, while the long immediate values are printed
     as hexadecimal.

     'cpu=...' allows to enforce a particular ISA when disassembling
     instructions, overriding the '-m' value or whatever is in the ELF
     file.  This might be useful to select ARC EM or HS ISA, because
     architecture is same for those and disassembler relies on private
     ELF header data to decide if code is for EM or HS. This option
     might be specified multiple times - only the latest value will be
     used.  Valid values are same as for the assembler '-mcpu=...'
     option.

     If the target is an ARM architecture then this switch can be used
     to select which register name set is used during disassembler.
     Specifying '-M reg-names-std' (the default) will select the
     register names as used in ARM's instruction set documentation, but
     with register 13 called 'sp', register 14 called 'lr' and register
     15 called 'pc'.  Specifying '-M reg-names-apcs' will select the
     name set used by the ARM Procedure Call Standard, whilst specifying
     '-M reg-names-raw' will just use 'r' followed by the register
     number.

     There are also two variants on the APCS register naming scheme
     enabled by '-M reg-names-atpcs' and '-M reg-names-special-atpcs'
     which use the ARM/Thumb Procedure Call Standard naming conventions.
     (Either with the normal register names or the special register
     names).

     This option can also be used for ARM architectures to force the
     disassembler to interpret all instructions as Thumb instructions by
     using the switch '--disassembler-options=force-thumb'.  This can be
     useful when attempting to disassemble thumb code produced by other
     compilers.

     For AArch64 targets this switch can be used to set whether
     instructions are disassembled as the most general instruction using
     the '-M no-aliases' option or whether instruction notes should be
     generated as comments in the disasssembly using '-M notes'.

     For the x86, some of the options duplicate functions of the '-m'
     switch, but allow finer grained control.  Multiple selections from
     the following may be specified as a comma separated string.
     'x86-64'
     'i386'
     'i8086'
          Select disassembly for the given architecture.

     'intel'
     'att'
          Select between intel syntax mode and AT&T syntax mode.

     'amd64'
     'intel64'
          Select between AMD64 ISA and Intel64 ISA.

     'intel-mnemonic'
     'att-mnemonic'
          Select between intel mnemonic mode and AT&T mnemonic mode.
          Note: 'intel-mnemonic' implies 'intel' and 'att-mnemonic'
          implies 'att'.

     'addr64'
     'addr32'
     'addr16'
     'data32'
     'data16'
          Specify the default address size and operand size.  These five
          options will be overridden if 'x86-64', 'i386' or 'i8086'
          appear later in the option string.

     'suffix'
          When in AT&T mode, instructs the disassembler to print a
          mnemonic suffix even when the suffix could be inferred by the
          operands.

     For PowerPC, the '-M' argument 'raw' selects disasssembly of
     hardware insns rather than aliases.  For example, you will see
     'rlwinm' rather than 'clrlwi', and 'addi' rather than 'li'.  All of
     the '-m' arguments for 'gas' that select a CPU are supported.
     These are: '403', '405', '440', '464', '476', '601', '603', '604',
     '620', '7400', '7410', '7450', '7455', '750cl', '821', '850',
     '860', 'a2', 'booke', 'booke32', 'cell', 'com', 'e200z4', 'e300',
     'e500', 'e500mc', 'e500mc64', 'e500x2', 'e5500', 'e6500', 'efs',
     'power4', 'power5', 'power6', 'power7', 'power8', 'power9', 'ppc',
     'ppc32', 'ppc64', 'ppc64bridge', 'ppcps', 'pwr', 'pwr2', 'pwr4',
     'pwr5', 'pwr5x', 'pwr6', 'pwr7', 'pwr8', 'pwr9', 'pwrx', 'titan',
     and 'vle'.  '32' and '64' modify the default or a prior CPU
     selection, disabling and enabling 64-bit insns respectively.  In
     addition, 'altivec', 'any', 'htm', 'vsx', and 'spe' add
     capabilities to a previous _or later_ CPU selection.  'any' will
     disassemble any opcode known to binutils, but in cases where an
     opcode has two different meanings or different arguments, you may
     not see the disassembly you expect.  If you disassemble without
     giving a CPU selection, a default will be chosen from information
     gleaned by BFD from the object files headers, but the result again
     may not be as you expect.

     For MIPS, this option controls the printing of instruction mnemonic
     names and register names in disassembled instructions.  Multiple
     selections from the following may be specified as a comma separated
     string, and invalid options are ignored:

     'no-aliases'
          Print the 'raw' instruction mnemonic instead of some pseudo
          instruction mnemonic.  I.e., print 'daddu' or 'or' instead of
          'move', 'sll' instead of 'nop', etc.

     'msa'
          Disassemble MSA instructions.

     'virt'
          Disassemble the virtualization ASE instructions.

     'xpa'
          Disassemble the eXtended Physical Address (XPA) ASE
          instructions.

     'gpr-names=ABI'
          Print GPR (general-purpose register) names as appropriate for
          the specified ABI. By default, GPR names are selected
          according to the ABI of the binary being disassembled.

     'fpr-names=ABI'
          Print FPR (floating-point register) names as appropriate for
          the specified ABI. By default, FPR numbers are printed rather
          than names.

     'cp0-names=ARCH'
          Print CP0 (system control coprocessor; coprocessor 0) register
          names as appropriate for the CPU or architecture specified by
          ARCH.  By default, CP0 register names are selected according
          to the architecture and CPU of the binary being disassembled.

     'hwr-names=ARCH'
          Print HWR (hardware register, used by the 'rdhwr' instruction)
          names as appropriate for the CPU or architecture specified by
          ARCH.  By default, HWR names are selected according to the
          architecture and CPU of the binary being disassembled.

     'reg-names=ABI'
          Print GPR and FPR names as appropriate for the selected ABI.

     'reg-names=ARCH'
          Print CPU-specific register names (CP0 register and HWR names)
          as appropriate for the selected CPU or architecture.

     For any of the options listed above, ABI or ARCH may be specified
     as 'numeric' to have numbers printed rather than names, for the
     selected types of registers.  You can list the available values of
     ABI and ARCH using the '--help' option.

     For VAX, you can specify function entry addresses with '-M
     entry:0xf00ba'.  You can use this multiple times to properly
     disassemble VAX binary files that don't contain symbol tables (like
     ROM dumps).  In these cases, the function entry mask would
     otherwise be decoded as VAX instructions, which would probably lead
     the rest of the function being wrongly disassembled.

'-p'
'--private-headers'
     Print information that is specific to the object file format.  The
     exact information printed depends upon the object file format.  For
     some object file formats, no additional information is printed.

'-P OPTIONS'
'--private=OPTIONS'
     Print information that is specific to the object file format.  The
     argument OPTIONS is a comma separated list that depends on the
     format (the lists of options is displayed with the help).

     For XCOFF, the available options are:
     'header'
     'aout'
     'sections'
     'syms'
     'relocs'
     'lineno,'
     'loader'
     'except'
     'typchk'
     'traceback'
     'toc'
     'ldinfo'

     Not all object formats support this option.  In particular the ELF
     format does not use it.

'-r'
'--reloc'
     Print the relocation entries of the file.  If used with '-d' or
     '-D', the relocations are printed interspersed with the
     disassembly.

'-R'
'--dynamic-reloc'
     Print the dynamic relocation entries of the file.  This is only
     meaningful for dynamic objects, such as certain types of shared
     libraries.  As for '-r', if used with '-d' or '-D', the relocations
     are printed interspersed with the disassembly.

'-s'
'--full-contents'
     Display the full contents of any sections requested.  By default
     all non-empty sections are displayed.

'-S'
'--source'
     Display source code intermixed with disassembly, if possible.
     Implies '-d'.

'--source-comment[=TXT]'
     Like the '-S' option, but all source code lines are displayed with
     a prefix of TXT.  Typically TXT will be a comment string which can
     be used to distinguish the assembler code from the source code.  If
     TXT is not provided then a default string of "# " (hash followed by
     a space), will be used.

'--prefix=PREFIX'
     Specify PREFIX to add to the absolute paths when used with '-S'.

'--prefix-strip=LEVEL'
     Indicate how many initial directory names to strip off the
     hardwired absolute paths.  It has no effect without
     '--prefix='PREFIX.

'--show-raw-insn'
     When disassembling instructions, print the instruction in hex as
     well as in symbolic form.  This is the default except when
     '--prefix-addresses' is used.

'--no-show-raw-insn'
     When disassembling instructions, do not print the instruction
     bytes.  This is the default when '--prefix-addresses' is used.

'--insn-width=WIDTH'
     Display WIDTH bytes on a single line when disassembling
     instructions.

'--visualize-jumps[=color|=extended-color|=off]'
     Visualize jumps that stay inside a function by drawing ASCII art
     between the start and target addresses.  The optional '=color'
     argument adds color to the output using simple terminal colors.
     Alternatively the '=extended-color' argument will add color using
     8bit colors, but these might not work on all terminals.

     If it is necessary to disable the 'visualize-jumps' option after it
     has previously been enabled then use 'visualize-jumps=off'.

'-W[lLiaprmfFsoRtUuTgAckK]'
'--dwarf[=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 any links to
          separate dwarf object files (dwo), if they are 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 linked, separate debug info file(s).  This can result
          in multiple versions of the same debug section being displayed
          if it exists in more than one file.

          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'.

'--dwarf-check'
     Enable additional checks for consistency of Dwarf information.

'--ctf=SECTION'

     Display the contents of the specified CTF section.  CTF sections
     themselves contain many subsections, all of which are displayed in
     order.

'--ctf-parent=SECTION'

     Specify the name of another section from which the CTF dictionary
     can inherit types.  (If none is specified, we assume the CTF
     dictionary inherits types from the default-named member of the
     archive contained within this section.)

'-G'
'--stabs'
     Display the full contents of any sections requested.  Display the
     contents of the .stab and .stab.index and .stab.excl sections from
     an ELF file.  This is only useful on systems (such as Solaris 2.0)
     in which '.stab' debugging symbol-table entries are carried in an
     ELF section.  In most other file formats, debugging symbol-table
     entries are interleaved with linkage symbols, and are visible in
     the '--syms' output.

'--start-address=ADDRESS'
     Start displaying data at the specified address.  This affects the
     output of the '-d', '-r' and '-s' options.

'--stop-address=ADDRESS'
     Stop displaying data at the specified address.  This affects the
     output of the '-d', '-r' and '-s' options.

'-t'
'--syms'
     Print the symbol table entries of the file.  This is similar to the
     information provided by the 'nm' program, although the display
     format is different.  The format of the output depends upon the
     format of the file being dumped, but there are two main types.  One
     looks like this:

          [  4](sec  3)(fl 0x00)(ty   0)(scl   3) (nx 1) 0x00000000 .bss
          [  6](sec  1)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 fred

     where the number inside the square brackets is the number of the
     entry in the symbol table, the SEC number is the section number,
     the FL value are the symbol's flag bits, the TY number is the
     symbol's type, the SCL number is the symbol's storage class and the
     NX value is the number of auxilary entries associated with the
     symbol.  The last two fields are the symbol's value and its name.

     The other common output format, usually seen with ELF based files,
     looks like this:

          00000000 l    d  .bss   00000000 .bss
          00000000 g       .text  00000000 fred

     Here the first number is the symbol's value (sometimes refered to
     as its address).  The next field is actually a set of characters
     and spaces indicating the flag bits that are set on the symbol.
     These characters are described below.  Next is the section with
     which the symbol is associated or _*ABS*_ if the section is
     absolute (ie not connected with any section), or _*UND*_ if the
     section is referenced in the file being dumped, but not defined
     there.

     After the section name comes another field, a number, which for
     common symbols is the alignment and for other symbol is the size.
     Finally the symbol's name is displayed.

     The flag characters are divided into 7 groups as follows:
     'l'
     'g'
     'u'
     '!'
          The symbol is a local (l), global (g), unique global (u),
          neither global nor local (a space) or both global and local
          (!).  A symbol can be neither local or global for a variety of
          reasons, e.g., because it is used for debugging, but it is
          probably an indication of a bug if it is ever both local and
          global.  Unique global symbols are a GNU extension to the
          standard set of ELF symbol bindings.  For such a symbol the
          dynamic linker will make sure that in the entire process there
          is just one symbol with this name and type in use.

     'w'
          The symbol is weak (w) or strong (a space).

     'C'
          The symbol denotes a constructor (C) or an ordinary symbol (a
          space).

     'W'
          The symbol is a warning (W) or a normal symbol (a space).  A
          warning symbol's name is a message to be displayed if the
          symbol following the warning symbol is ever referenced.

     'I'
     'i'
          The symbol is an indirect reference to another symbol (I), a
          function to be evaluated during reloc processing (i) or a
          normal symbol (a space).

     'd'
     'D'
          The symbol is a debugging symbol (d) or a dynamic symbol (D)
          or a normal symbol (a space).

     'F'
     'f'
     'O'
          The symbol is the name of a function (F) or a file (f) or an
          object (O) or just a normal symbol (a space).

'-T'
'--dynamic-syms'
     Print the dynamic symbol table entries of the file.  This is only
     meaningful for dynamic objects, such as certain types of shared
     libraries.  This is similar to the information provided by the 'nm'
     program when given the '-D' ('--dynamic') option.

     The output format is similar to that produced by the '--syms'
     option, except that an extra field is inserted before the symbol's
     name, giving the version information associated with the symbol.
     If the version is the default version to be used when resolving
     unversioned references to the symbol then it's displayed as is,
     otherwise it's put into parentheses.

'--special-syms'
     When displaying symbols include those which the target considers to
     be special in some way and which would not normally be of interest
     to the user.

'-V'
'--version'
     Print the version number of 'objdump' and exit.

'-x'
'--all-headers'
     Display all available header information, including the symbol
     table and relocation entries.  Using '-x' is equivalent to
     specifying all of '-a -f -h -p -r -t'.

'-w'
'--wide'
     Format some lines for output devices that have more than 80
     columns.  Also do not truncate symbol names when they are
     displayed.

'-z'
'--disassemble-zeroes'
     Normally the disassembly output will skip blocks of zeroes.  This
     option directs the disassembler to disassemble those blocks, just
     like any other data.


File: binutils.info,  Node: ranlib,  Next: size,  Prev: objdump,  Up: Top

5 ranlib
********

     ranlib [--plugin NAME] [-DhHvVt] ARCHIVE

   'ranlib' generates an index to the contents of an archive and stores
it in the archive.  The index lists each symbol defined by a member of
an archive that is a relocatable object file.

   You may use 'nm -s' or 'nm --print-armap' to list this index.

   An archive with such an index speeds up linking to the library and
allows routines in the library to call each other without regard to
their placement in the archive.

   The GNU 'ranlib' program is another form of GNU 'ar'; running
'ranlib' is completely equivalent to executing 'ar -s'.  *Note ar::.

'-h'
'-H'
'--help'
     Show usage information for 'ranlib'.

'-v'
'-V'
'--version'
     Show the version number of 'ranlib'.

'-D'
     Operate in _deterministic_ mode.  The symbol map archive member's
     header will show zero for the UID, GID, and timestamp.  When this
     option is used, multiple runs will produce identical output files.

     If 'binutils' was configured with
     '--enable-deterministic-archives', then this mode is on by default.
     It can be disabled with the '-U' option, described below.

'-t'
     Update the timestamp of the symbol map of an archive.

'-U'
     Do _not_ operate in _deterministic_ mode.  This is the inverse of
     the '-D' option, above: the archive index will get actual UID, GID,
     timestamp, and file mode values.

     If 'binutils' was configured _without_
     '--enable-deterministic-archives', then this mode is on by default.


File: binutils.info,  Node: size,  Next: strings,  Prev: ranlib,  Up: Top

6 size
******

     size [-A|-B|-G|--format=COMPATIBILITY]
          [--help]
          [-d|-o|-x|--radix=NUMBER]
          [--common]
          [-t|--totals]
          [--target=BFDNAME] [-V|--version]
          [OBJFILE...]

   The GNU 'size' utility lists the section sizes and the total size for
each of the binary files OBJFILE on its argument list.  By default, one
line of output is generated for each file or each module if the file is
an archive.

   OBJFILE... are the files to be examined.  If none are specified, the
file 'a.out' will be used instead.

   The command-line options have the following meanings:

'-A'
'-B'
'-G'
'--format=COMPATIBILITY'
     Using one of these options, you can choose whether the output from
     GNU 'size' resembles output from System V 'size' (using '-A', or
     '--format=sysv'), or Berkeley 'size' (using '-B', or
     '--format=berkeley').  The default is the one-line format similar
     to Berkeley's.  Alternatively, you can choose the GNU format output
     (using '-G', or '--format=gnu'), this is similar to Berkeley's
     output format, but sizes are counted differently.

     Here is an example of the Berkeley (default) format of output from
     'size':
          $ size --format=Berkeley ranlib size
             text    data     bss     dec     hex filename
           294880   81920   11592  388392   5ed28 ranlib
           294880   81920   11888  388688   5ee50 size

     The Berkeley style output counts read only data in the 'text'
     column, not in the 'data' column, the 'dec' and 'hex' columns both
     display the sum of the 'text', 'data', and 'bss' columns in decimal
     and hexadecimal respectively.

     The GNU format counts read only data in the 'data' column, not the
     'text' column, and only displays the sum of the 'text', 'data', and
     'bss' columns once, in the 'total' column.  The '--radix' option
     can be used to change the number base for all columns.  Here is the
     same data displayed with GNU conventions:

          $ size --format=GNU ranlib size
                text       data        bss      total filename
              279880      96920      11592     388392 ranlib
              279880      96920      11888     388688 size

     This is the same data, but displayed closer to System V
     conventions:

          $ size --format=SysV ranlib size
          ranlib  :
          section         size         addr
          .text         294880         8192
          .data          81920       303104
          .bss           11592       385024
          Total         388392


          size  :
          section         size         addr
          .text         294880         8192
          .data          81920       303104
          .bss           11888       385024
          Total         388688

'--help'
     Show a summary of acceptable arguments and options.

'-d'
'-o'
'-x'
'--radix=NUMBER'
     Using one of these options, you can control whether the size of
     each section is given in decimal ('-d', or '--radix=10'); octal
     ('-o', or '--radix=8'); or hexadecimal ('-x', or '--radix=16').  In
     '--radix=NUMBER', only the three values (8, 10, 16) are supported.
     The total size is always given in two radices; decimal and
     hexadecimal for '-d' or '-x' output, or octal and hexadecimal if
     you're using '-o'.

'--common'
     Print total size of common symbols in each file.  When using
     Berkeley or GNU format these are included in the bss size.

'-t'
'--totals'
     Show totals of all objects listed (Berkeley or GNU format mode
     only).

'--target=BFDNAME'
     Specify that the object-code format for OBJFILE is BFDNAME.  This
     option may not be necessary; 'size' can automatically recognize
     many formats.  *Note Target Selection::, for more information.

'-V'
'--version'
     Display the version number of 'size'.


File: binutils.info,  Node: strings,  Next: strip,  Prev: size,  Up: Top

7 strings
*********

     strings [-afovV] [-MIN-LEN]
             [-n MIN-LEN] [--bytes=MIN-LEN]
             [-t RADIX] [--radix=RADIX]
             [-e ENCODING] [--encoding=ENCODING]
             [-] [--all] [--print-file-name]
             [-T BFDNAME] [--target=BFDNAME]
             [-w] [--include-all-whitespace]
             [-s] [--output-separatorSEP_STRING]
             [--help] [--version] FILE...

   For each FILE given, GNU 'strings' prints the printable character
sequences that are at least 4 characters long (or the number given with
the options below) and are followed by an unprintable character.

   Depending upon how the strings program was configured it will default
to either displaying all the printable sequences that it can find in
each file, or only those sequences that are in loadable, initialized
data sections.  If the file type in unrecognizable, or if strings is
reading from stdin then it will always display all of the printable
sequences that it can find.

   For backwards compatibility any file that occurs after a command-line
option of just '-' will also be scanned in full, regardless of the
presence of any '-d' option.

   'strings' is mainly useful for determining the contents of non-text
files.

'-a'
'--all'
'-'
     Scan the whole file, regardless of what sections it contains or
     whether those sections are loaded or initialized.  Normally this is
     the default behaviour, but strings can be configured so that the
     '-d' is the default instead.

     The '-' option is position dependent and forces strings to perform
     full scans of any file that is mentioned after the '-' on the
     command line, even if the '-d' option has been specified.

'-d'
'--data'
     Only print strings from initialized, loaded data sections in the
     file.  This may reduce the amount of garbage in the output, but it
     also exposes the strings program to any security flaws that may be
     present in the BFD library used to scan and load sections.  Strings
     can be configured so that this option is the default behaviour.  In
     such cases the '-a' option can be used to avoid using the BFD
     library and instead just print all of the strings found in the
     file.

'-f'
'--print-file-name'
     Print the name of the file before each string.

'--help'
     Print a summary of the program usage on the standard output and
     exit.

'-MIN-LEN'
'-n MIN-LEN'
'--bytes=MIN-LEN'
     Print sequences of characters that are at least MIN-LEN characters
     long, instead of the default 4.

'-o'
     Like '-t o'.  Some other versions of 'strings' have '-o' act like
     '-t d' instead.  Since we can not be compatible with both ways, we
     simply chose one.

'-t RADIX'
'--radix=RADIX'
     Print the offset within the file before each string.  The single
     character argument specifies the radix of the offset--'o' for
     octal, 'x' for hexadecimal, or 'd' for decimal.

'-e ENCODING'
'--encoding=ENCODING'
     Select the character encoding of the strings that are to be found.
     Possible values for ENCODING are: 's' = single-7-bit-byte
     characters (ASCII, ISO 8859, etc., default), 'S' =
     single-8-bit-byte characters, 'b' = 16-bit bigendian, 'l' = 16-bit
     littleendian, 'B' = 32-bit bigendian, 'L' = 32-bit littleendian.
     Useful for finding wide character strings.  ('l' and 'b' apply to,
     for example, Unicode UTF-16/UCS-2 encodings).

'-T BFDNAME'
'--target=BFDNAME'
     Specify an object code format other than your system's default
     format.  *Note Target Selection::, for more information.

'-v'
'-V'
'--version'
     Print the program version number on the standard output and exit.

'-w'
'--include-all-whitespace'
     By default tab and space characters are included in the strings
     that are displayed, but other whitespace characters, such a
     newlines and carriage returns, are not.  The '-w' option changes
     this so that all whitespace characters are considered to be part of
     a string.

'-s'
'--output-separator'
     By default, output strings are delimited by a new-line.  This
     option allows you to supply any string to be used as the output
     record separator.  Useful with -include-all-whitespace where
     strings may contain new-lines internally.


File: binutils.info,  Node: strip,  Next: c++filt,  Prev: strings,  Up: Top

8 strip
*******

     strip [-F BFDNAME |--target=BFDNAME]
           [-I BFDNAME |--input-target=BFDNAME]
           [-O BFDNAME |--output-target=BFDNAME]
           [-s|--strip-all]
           [-S|-g|-d|--strip-debug]
           [--strip-dwo]
           [-K SYMBOLNAME|--keep-symbol=SYMBOLNAME]
           [-M|--merge-notes][--no-merge-notes]
           [-N SYMBOLNAME |--strip-symbol=SYMBOLNAME]
           [-w|--wildcard]
           [-x|--discard-all] [-X |--discard-locals]
           [-R SECTIONNAME |--remove-section=SECTIONNAME]
           [--keep-section=SECTIONPATTERN]
           [--remove-relocations=SECTIONPATTERN]
           [-o FILE] [-p|--preserve-dates]
           [-D|--enable-deterministic-archives]
           [-U|--disable-deterministic-archives]
           [--keep-file-symbols]
           [--only-keep-debug]
           [-v |--verbose] [-V|--version]
           [--help] [--info]
           OBJFILE...

   GNU 'strip' discards all symbols from object files OBJFILE.  The list
of object files may include archives.  At least one object file must be
given.

   'strip' modifies the files named in its argument, rather than writing
modified copies under different names.

'-F BFDNAME'
'--target=BFDNAME'
     Treat the original OBJFILE as a file with the object code format
     BFDNAME, and rewrite it in the same format.  *Note Target
     Selection::, for more information.

'--help'
     Show a summary of the options to 'strip' and exit.

'--info'
     Display a list showing all architectures and object formats
     available.

'-I BFDNAME'
'--input-target=BFDNAME'
     Treat the original OBJFILE as a file with the object code format
     BFDNAME.  *Note Target Selection::, for more information.

'-O BFDNAME'
'--output-target=BFDNAME'
     Replace OBJFILE with a file in the output format BFDNAME.  *Note
     Target Selection::, for more information.

'-R SECTIONNAME'
'--remove-section=SECTIONNAME'
     Remove any section named SECTIONNAME from the output file, in
     addition to whatever sections would otherwise be removed.  This
     option may be given more than once.  Note that using this option
     inappropriately may make the output file unusable.  The wildcard
     character '*' may be given at the end of SECTIONNAME.  If so, then
     any section starting with SECTIONNAME will be removed.

     If the first character of SECTIONPATTERN is the exclamation point
     (!)  then matching sections will not be removed even if an earlier
     use of '--remove-section' on the same command line would otherwise
     remove it.  For example:

            --remove-section=.text.* --remove-section=!.text.foo

     will remove all sections matching the pattern '.text.*', but will
     not remove the section '.text.foo'.

'--keep-section=SECTIONPATTERN'
     When removing sections from the output file, keep sections that
     match SECTIONPATTERN.

'--remove-relocations=SECTIONPATTERN'
     Remove relocations from the output file for any section matching
     SECTIONPATTERN.  This option may be given more than once.  Note
     that using this option inappropriately may make the output file
     unusable.  Wildcard characters are accepted in SECTIONPATTERN.  For
     example:

            --remove-relocations=.text.*

     will remove the relocations for all sections matching the patter
     '.text.*'.

     If the first character of SECTIONPATTERN is the exclamation point
     (!)  then matching sections will not have their relocation removed
     even if an earlier use of '--remove-relocations' on the same
     command line would otherwise cause the relocations to be removed.
     For example:

            --remove-relocations=.text.* --remove-relocations=!.text.foo

     will remove all relocations for sections matching the pattern
     '.text.*', but will not remove relocations for the section
     '.text.foo'.

'-s'
'--strip-all'
     Remove all symbols.

'-g'
'-S'
'-d'
'--strip-debug'
     Remove debugging symbols only.

'--strip-dwo'
     Remove the contents of all DWARF .dwo sections, leaving the
     remaining debugging sections and all symbols intact.  See the
     description of this option in the 'objcopy' section for more
     information.

'--strip-unneeded'
     Remove all symbols that are not needed for relocation processing.

'-K SYMBOLNAME'
'--keep-symbol=SYMBOLNAME'
     When stripping symbols, keep symbol SYMBOLNAME even if it would
     normally be stripped.  This option may be given more than once.

'-M'
'--merge-notes'
'--no-merge-notes'
     For ELF files, attempt (or do not attempt) to reduce the size of
     any SHT_NOTE type sections by removing duplicate notes.  The
     default is to attempt this reduction unless stripping debug or DWO
     information.

'-N SYMBOLNAME'
'--strip-symbol=SYMBOLNAME'
     Remove symbol SYMBOLNAME from the source file.  This option may be
     given more than once, and may be combined with strip options other
     than '-K'.

'-o FILE'
     Put the stripped output in FILE, rather than replacing the existing
     file.  When this argument is used, only one OBJFILE argument may be
     specified.

'-p'
'--preserve-dates'
     Preserve the access and modification dates of the file.

'-D'
'--enable-deterministic-archives'
     Operate in _deterministic_ mode.  When copying archive members and
     writing the archive index, use zero for UIDs, GIDs, timestamps, and
     use consistent file modes for all files.

     If 'binutils' was configured with
     '--enable-deterministic-archives', then this mode is on by default.
     It can be disabled with the '-U' option, below.

'-U'
'--disable-deterministic-archives'
     Do _not_ operate in _deterministic_ mode.  This is the inverse of
     the '-D' option, above: when copying archive members and writing
     the archive index, use their actual UID, GID, timestamp, and file
     mode values.

     This is the default unless 'binutils' was configured with
     '--enable-deterministic-archives'.

'-w'
'--wildcard'
     Permit regular expressions in SYMBOLNAMEs used in other command
     line options.  The question mark (?), asterisk (*), backslash (\)
     and square brackets ([]) operators can be used anywhere in the
     symbol name.  If the first character of the symbol name is the
     exclamation point (!)  then the sense of the switch is reversed for
     that symbol.  For example:

            -w -K !foo -K fo*

     would cause strip to only keep symbols that start with the letters
     "fo", but to discard the symbol "foo".

'-x'
'--discard-all'
     Remove non-global symbols.

'-X'
'--discard-locals'
     Remove compiler-generated local symbols.  (These usually start with
     'L' or '.'.)

'--keep-file-symbols'
     When stripping a file, perhaps with '--strip-debug' or
     '--strip-unneeded', retain any symbols specifying source file
     names, which would otherwise get stripped.

'--only-keep-debug'
     Strip a file, emptying the contents of any sections that would not
     be stripped by '--strip-debug' and leaving the debugging sections
     intact.  In ELF files, this preserves all the note sections in the
     output as well.

     Note - the section headers of the stripped sections are preserved,
     including their sizes, but the contents of the section are
     discarded.  The section headers are preserved so that other tools
     can match up the debuginfo file with the real executable, even if
     that executable has been relocated to a different address space.

     The intention is that this option will be used in conjunction with
     '--add-gnu-debuglink' to create a two part executable.  One a
     stripped binary which will occupy less space in RAM and in a
     distribution and the second a debugging information file which is
     only needed if debugging abilities are required.  The suggested
     procedure to create these files is as follows:

       1. Link the executable as normal.  Assuming that it is called
          'foo' then...
       2. Run 'objcopy --only-keep-debug foo foo.dbg' to create a file
          containing the debugging info.
       3. Run 'objcopy --strip-debug foo' to create a stripped
          executable.
       4. Run 'objcopy --add-gnu-debuglink=foo.dbg foo' to add a link to
          the debugging info into the stripped executable.

     Note--the choice of '.dbg' as an extension for the debug info file
     is arbitrary.  Also the '--only-keep-debug' step is optional.  You
     could instead do this:

       1. Link the executable as normal.
       2. Copy 'foo' to 'foo.full'
       3. Run 'strip --strip-debug foo'
       4. Run 'objcopy --add-gnu-debuglink=foo.full foo'

     i.e., the file pointed to by the '--add-gnu-debuglink' can be the
     full executable.  It does not have to be a file created by the
     '--only-keep-debug' switch.

     Note--this switch is only intended for use on fully linked files.
     It does not make sense to use it on object files where the
     debugging information may be incomplete.  Besides the gnu_debuglink
     feature currently only supports the presence of one filename
     containing debugging information, not multiple filenames on a
     one-per-object-file basis.

'-V'
'--version'
     Show the version number for 'strip'.

'-v'
'--verbose'
     Verbose output: list all object files modified.  In the case of
     archives, 'strip -v' lists all members of the archive.


File: binutils.info,  Node: c++filt,  Next: addr2line,  Prev: strip,  Up: Top

9 c++filt
*********

     c++filt [-_|--strip-underscore]
             [-n|--no-strip-underscore]
             [-p|--no-params]
             [-t|--types]
             [-i|--no-verbose]
             [-r|--no-recurse-limit]
             [-R|--recurse-limit]
             [-s FORMAT|--format=FORMAT]
             [--help]  [--version]  [SYMBOL...]

   The C++ and Java languages provide function overloading, which means
that you can write many functions with the same name, providing that
each function takes parameters of different types.  In order to be able
to distinguish these similarly named functions C++ and Java encode them
into a low-level assembler name which uniquely identifies each different
version.  This process is known as "mangling".  The 'c++filt' (1)
program does the inverse mapping: it decodes ("demangles") low-level
names into user-level names so that they can be read.

   Every alphanumeric word (consisting of letters, digits, underscores,
dollars, or periods) seen in the input is a potential mangled name.  If
the name decodes into a C++ name, the C++ name replaces the low-level
name in the output, otherwise the original word is output.  In this way
you can pass an entire assembler source file, containing mangled names,
through 'c++filt' and see the same source file containing demangled
names.

   You can also use 'c++filt' to decipher individual symbols by passing
them on the command line:

     c++filt SYMBOL

   If no SYMBOL arguments are given, 'c++filt' reads symbol names from
the standard input instead.  All the results are printed on the standard
output.  The difference between reading names from the command line
versus reading names from the standard input is that command-line
arguments are expected to be just mangled names and no checking is
performed to separate them from surrounding text.  Thus for example:

     c++filt -n _Z1fv

   will work and demangle the name to "f()" whereas:

     c++filt -n _Z1fv,

   will not work.  (Note the extra comma at the end of the mangled name
which makes it invalid).  This command however will work:

     echo _Z1fv, | c++filt -n

   and will display "f(),", i.e., the demangled name followed by a
trailing comma.  This behaviour is because when the names are read from
the standard input it is expected that they might be part of an
assembler source file where there might be extra, extraneous characters
trailing after a mangled name.  For example:

         .type   _Z1fv, @function

'-_'
'--strip-underscore'
     On some systems, both the C and C++ compilers put an underscore in
     front of every name.  For example, the C name 'foo' gets the
     low-level name '_foo'.  This option removes the initial underscore.
     Whether 'c++filt' removes the underscore by default is target
     dependent.

'-n'
'--no-strip-underscore'
     Do not remove the initial underscore.

'-p'
'--no-params'
     When demangling the name of a function, do not display the types of
     the function's parameters.

'-t'
'--types'
     Attempt to demangle types as well as function names.  This is
     disabled by default since mangled types are normally only used
     internally in the compiler, and they can be confused with
     non-mangled names.  For example, a function called "a" treated as a
     mangled type name would be demangled to "signed char".

'-i'
'--no-verbose'
     Do not include implementation details (if any) in the demangled
     output.

'-r'
'-R'
'--recurse-limit'
'--no-recurse-limit'
'--recursion-limit'
'--no-recursion-limit'
     Enables or disables a limit on the amount of recursion performed
     whilst demangling strings.  Since the name mangling formats allow
     for an inifinite level of recursion it is possible to create
     strings whose decoding will exhaust the amount of stack space
     available on the host machine, triggering a memory fault.  The
     limit tries to prevent this from happening by restricting recursion
     to 2048 levels of nesting.

     The default is for this limit to be enabled, but disabling it may
     be necessary in order to demangle truly complicated names.  Note
     however that if the recursion limit is disabled then stack
     exhaustion is possible and any bug reports about such an event will
     be rejected.

     The '-r' option is a synonym for the '--no-recurse-limit' option.
     The '-R' option is a synonym for the '--recurse-limit' option.

'-s FORMAT'
'--format=FORMAT'
     'c++filt' can decode various methods of mangling, used by different
     compilers.  The argument to this option selects which method it
     uses:

     'auto'
          Automatic selection based on executable (the default method)
     'gnu'
          the one used by the GNU C++ compiler (g++)
     'lucid'
          the one used by the Lucid compiler (lcc)
     'arm'
          the one specified by the C++ Annotated Reference Manual
     'hp'
          the one used by the HP compiler (aCC)
     'edg'
          the one used by the EDG compiler
     'gnu-v3'
          the one used by the GNU C++ compiler (g++) with the V3 ABI.
     'java'
          the one used by the GNU Java compiler (gcj)
     'gnat'
          the one used by the GNU Ada compiler (GNAT).

'--help'
     Print a summary of the options to 'c++filt' and exit.

'--version'
     Print the version number of 'c++filt' and exit.

     _Warning:_ 'c++filt' is a new utility, and the details of its user
     interface are subject to change in future releases.  In particular,
     a command-line option may be required in the future to decode a
     name passed as an argument on the command line; in other words,

          c++filt SYMBOL

     may in a future release become

          c++filt OPTION SYMBOL

   ---------- Footnotes ----------

   (1) MS-DOS does not allow '+' characters in file names, so on MS-DOS
this program is named 'CXXFILT'.


File: binutils.info,  Node: addr2line,  Next: windmc,  Prev: c++filt,  Up: Top

10 addr2line
************

     addr2line [-a|--addresses]
               [-b BFDNAME|--target=BFDNAME]
               [-C|--demangle[=STYLE]]
               [-r|--no-recurse-limit]
               [-R|--recurse-limit]
               [-e FILENAME|--exe=FILENAME]
               [-f|--functions] [-s|--basename]
               [-i|--inlines]
               [-p|--pretty-print]
               [-j|--section=NAME]
               [-H|--help] [-V|--version]
               [addr addr ...]

   'addr2line' translates addresses into file names and line numbers.
Given an address in an executable or an offset in a section of a
relocatable object, it uses the debugging information to figure out
which file name and line number are associated with it.

   The executable or relocatable object to use is specified with the
'-e' option.  The default is the file 'a.out'.  The section in the
relocatable object to use is specified with the '-j' option.

   'addr2line' has two modes of operation.

   In the first, hexadecimal addresses are specified on the command
line, and 'addr2line' displays the file name and line number for each
address.

   In the second, 'addr2line' reads hexadecimal addresses from standard
input, and prints the file name and line number for each address on
standard output.  In this mode, 'addr2line' may be used in a pipe to
convert dynamically chosen addresses.

   The format of the output is 'FILENAME:LINENO'.  By default each input
address generates one line of output.

   Two options can generate additional lines before each
'FILENAME:LINENO' line (in that order).

   If the '-a' option is used then a line with the input address is
displayed.

   If the '-f' option is used, then a line with the 'FUNCTIONNAME' is
displayed.  This is the name of the function containing the address.

   One option can generate additional lines after the 'FILENAME:LINENO'
line.

   If the '-i' option is used and the code at the given address is
present there because of inlining by the compiler then additional lines
are displayed afterwards.  One or two extra lines (if the '-f' option is
used) are displayed for each inlined function.

   Alternatively if the '-p' option is used then each input address
generates a single, long, output line containing the address, the
function name, the file name and the line number.  If the '-i' option
has also been used then any inlined functions will be displayed in the
same manner, but on separate lines, and prefixed by the text '(inlined
by)'.

   If the file name or function name can not be determined, 'addr2line'
will print two question marks in their place.  If the line number can
not be determined, 'addr2line' will print 0.

   The long and short forms of options, shown here as alternatives, are
equivalent.

'-a'
'--addresses'
     Display the address before the function name, file and line number
     information.  The address is printed with a '0x' prefix to easily
     identify it.

'-b BFDNAME'
'--target=BFDNAME'
     Specify that the object-code format for the object files is
     BFDNAME.

'-C'
'--demangle[=STYLE]'
     Decode ("demangle") low-level symbol names into user-level names.
     Besides removing any initial underscore prepended by the system,
     this makes C++ function names readable.  Different compilers have
     different mangling styles.  The optional demangling style argument
     can be used to choose an appropriate demangling style for your
     compiler.  *Note c++filt::, for more information on demangling.

'-e FILENAME'
'--exe=FILENAME'
     Specify the name of the executable for which addresses should be
     translated.  The default file is 'a.out'.

'-f'
'--functions'
     Display function names as well as file and line number information.

'-s'
'--basenames'
     Display only the base of each file name.

'-i'
'--inlines'
     If the address belongs to a function that was inlined, the source
     information for all enclosing scopes back to the first non-inlined
     function will also be printed.  For example, if 'main' inlines
     'callee1' which inlines 'callee2', and address is from 'callee2',
     the source information for 'callee1' and 'main' will also be
     printed.

'-j'
'--section'
     Read offsets relative to the specified section instead of absolute
     addresses.

'-p'
'--pretty-print'
     Make the output more human friendly: each location are printed on
     one line.  If option '-i' is specified, lines for all enclosing
     scopes are prefixed with '(inlined by)'.

'-r'
'-R'
'--recurse-limit'
'--no-recurse-limit'
'--recursion-limit'
'--no-recursion-limit'
     Enables or disables a limit on the amount of recursion performed
     whilst demangling strings.  Since the name mangling formats allow
     for an inifinite level of recursion it is possible to create
     strings whose decoding will exhaust the amount of stack space
     available on the host machine, triggering a memory fault.  The
     limit tries to prevent this from happening by restricting recursion
     to 2048 levels of nesting.

     The default is for this limit to be enabled, but disabling it may
     be necessary in order to demangle truly complicated names.  Note
     however that if the recursion limit is disabled then stack
     exhaustion is possible and any bug reports about such an event will
     be rejected.

     The '-r' option is a synonym for the '--no-recurse-limit' option.
     The '-R' option is a synonym for the '--recurse-limit' option.

     Note this option is only effective if the '-C' or '--demangle'
     option has been enabled.


File: binutils.info,  Node: windmc,  Next: windres,  Prev: addr2line,  Up: Top

11 windmc
*********

'windmc' may be used to generator Windows message resources.

     _Warning:_ 'windmc' is not always built as part of the binary
     utilities, since it is only useful for Windows targets.

     windmc [options] input-file

   'windmc' reads message definitions from an input file (.mc) and
translate them into a set of output files.  The output files may be of
four kinds:

'h'
     A C header file containing the message definitions.

'rc'
     A resource file compilable by the 'windres' tool.

'bin'
     One or more binary files containing the resource data for a
     specific message language.

'dbg'
     A C include file that maps message id's to their symbolic name.

   The exact description of these different formats is available in
documentation from Microsoft.

   When 'windmc' converts from the 'mc' format to the 'bin' format,
'rc', 'h', and optional 'dbg' it is acting like the Windows Message
Compiler.

'-a'
'--ascii_in'
     Specifies that the input file specified is ASCII. This is the
     default behaviour.

'-A'
'--ascii_out'
     Specifies that messages in the output 'bin' files should be in
     ASCII format.

'-b'
'--binprefix'
     Specifies that 'bin' filenames should have to be prefixed by the
     basename of the source file.

'-c'
'--customflag'
     Sets the customer bit in all message id's.

'-C CODEPAGE'
'--codepage_in CODEPAGE'
     Sets the default codepage to be used to convert input file to
     UTF16.  The default is ocdepage 1252.

'-d'
'--decimal_values'
     Outputs the constants in the header file in decimal.  Default is
     using hexadecimal output.

'-e EXT'
'--extension EXT'
     The extension for the header file.  The default is .h extension.

'-F TARGET'
'--target TARGET'
     Specify the BFD format to use for a bin file as output.  This is a
     BFD target name; you can use the '--help' option to see a list of
     supported targets.  Normally 'windmc' will use the default format,
     which is the first one listed by the '--help' option.  *note Target
     Selection::.

'-h PATH'
'--headerdir PATH'
     The target directory of the generated header file.  The default is
     the current directory.

'-H'
'--help'
     Displays a list of command-line options and then exits.

'-m CHARACTERS'
'--maxlength CHARACTERS'
     Instructs 'windmc' to generate a warning if the length of any
     message exceeds the number specified.

'-n'
'--nullterminate'
     Terminate message text in 'bin' files by zero.  By default they are
     terminated by CR/LF.

'-o'
'--hresult_use'
     Not yet implemented.  Instructs 'windmc' to generate an OLE2 header
     file, using HRESULT definitions.  Status codes are used if the flag
     is not specified.

'-O CODEPAGE'
'--codepage_out CODEPAGE'
     Sets the default codepage to be used to output text files.  The
     default is ocdepage 1252.

'-r PATH'
'--rcdir PATH'
     The target directory for the generated 'rc' script and the
     generated 'bin' files that the resource compiler script includes.
     The default is the current directory.

'-u'
'--unicode_in'
     Specifies that the input file is UTF16.

'-U'
'--unicode_out'
     Specifies that messages in the output 'bin' file should be in UTF16
     format.  This is the default behaviour.

'-v'
'--verbose'
     Enable verbose mode.

'-V'
'--version'
     Prints the version number for 'windmc'.

'-x PATH'
'--xdgb PATH'
     The path of the 'dbg' C include file that maps message id's to the
     symbolic name.  No such file is generated without specifying the
     switch.


File: binutils.info,  Node: windres,  Next: dlltool,  Prev: windmc,  Up: Top

12 windres
**********

'windres' may be used to manipulate Windows resources.

     _Warning:_ 'windres' is not always built as part of the binary
     utilities, since it is only useful for Windows targets.

     windres [options] [input-file] [output-file]

   'windres' reads resources from an input file and copies them into an
output file.  Either file may be in one of three formats:

'rc'
     A text format read by the Resource Compiler.

'res'
     A binary format generated by the Resource Compiler.

'coff'
     A COFF object or executable.

   The exact description of these different formats is available in
documentation from Microsoft.

   When 'windres' converts from the 'rc' format to the 'res' format, it
is acting like the Windows Resource Compiler.  When 'windres' converts
from the 'res' format to the 'coff' format, it is acting like the
Windows 'CVTRES' program.

   When 'windres' generates an 'rc' file, the output is similar but not
identical to the format expected for the input.  When an input 'rc' file
refers to an external filename, an output 'rc' file will instead include
the file contents.

   If the input or output format is not specified, 'windres' will guess
based on the file name, or, for the input file, the file contents.  A
file with an extension of '.rc' will be treated as an 'rc' file, a file
with an extension of '.res' will be treated as a 'res' file, and a file
with an extension of '.o' or '.exe' will be treated as a 'coff' file.

   If no output file is specified, 'windres' will print the resources in
'rc' format to standard output.

   The normal use is for you to write an 'rc' file, use 'windres' to
convert it to a COFF object file, and then link the COFF file into your
application.  This will make the resources described in the 'rc' file
available to Windows.

'-i FILENAME'
'--input FILENAME'
     The name of the input file.  If this option is not used, then
     'windres' will use the first non-option argument as the input file
     name.  If there are no non-option arguments, then 'windres' will
     read from standard input.  'windres' can not read a COFF file from
     standard input.

'-o FILENAME'
'--output FILENAME'
     The name of the output file.  If this option is not used, then
     'windres' will use the first non-option argument, after any used
     for the input file name, as the output file name.  If there is no
     non-option argument, then 'windres' will write to standard output.
     'windres' can not write a COFF file to standard output.  Note, for
     compatibility with 'rc' the option '-fo' is also accepted, but its
     use is not recommended.

'-J FORMAT'
'--input-format FORMAT'
     The input format to read.  FORMAT may be 'res', 'rc', or 'coff'.
     If no input format is specified, 'windres' will guess, as described
     above.

'-O FORMAT'
'--output-format FORMAT'
     The output format to generate.  FORMAT may be 'res', 'rc', or
     'coff'.  If no output format is specified, 'windres' will guess, as
     described above.

'-F TARGET'
'--target TARGET'
     Specify the BFD format to use for a COFF file as input or output.
     This is a BFD target name; you can use the '--help' option to see a
     list of supported targets.  Normally 'windres' will use the default
     format, which is the first one listed by the '--help' option.
     *note Target Selection::.

'--preprocessor PROGRAM'
     When 'windres' reads an 'rc' file, it runs it through the C
     preprocessor first.  This option may be used to specify the
     preprocessor to use, including any leading arguments.  The default
     preprocessor argument is 'gcc -E -xc-header -DRC_INVOKED'.

'--preprocessor-arg OPTION'
     When 'windres' reads an 'rc' file, it runs it through the C
     preprocessor first.  This option may be used to specify additional
     text to be passed to preprocessor on its command line.  This option
     can be used multiple times to add multiple options to the
     preprocessor command line.

'-I DIRECTORY'
'--include-dir DIRECTORY'
     Specify an include directory to use when reading an 'rc' file.
     'windres' will pass this to the preprocessor as an '-I' option.
     'windres' will also search this directory when looking for files
     named in the 'rc' file.  If the argument passed to this command
     matches any of the supported FORMATS (as described in the '-J'
     option), it will issue a deprecation warning, and behave just like
     the '-J' option.  New programs should not use this behaviour.  If a
     directory happens to match a FORMAT, simple prefix it with './' to
     disable the backward compatibility.

'-D TARGET'
'--define SYM[=VAL]'
     Specify a '-D' option to pass to the preprocessor when reading an
     'rc' file.

'-U TARGET'
'--undefine SYM'
     Specify a '-U' option to pass to the preprocessor when reading an
     'rc' file.

'-r'
     Ignored for compatibility with rc.

'-v'
     Enable verbose mode.  This tells you what the preprocessor is if
     you didn't specify one.

'-c VAL'
'--codepage VAL'
     Specify the default codepage to use when reading an 'rc' file.  VAL
     should be a hexadecimal prefixed by '0x' or decimal codepage code.
     The valid range is from zero up to 0xffff, but the validity of the
     codepage is host and configuration dependent.

'-l VAL'
'--language VAL'
     Specify the default language to use when reading an 'rc' file.  VAL
     should be a hexadecimal language code.  The low eight bits are the
     language, and the high eight bits are the sublanguage.

'--use-temp-file'
     Use a temporary file to instead of using popen to read the output
     of the preprocessor.  Use this option if the popen implementation
     is buggy on the host (eg., certain non-English language versions of
     Windows 95 and Windows 98 are known to have buggy popen where the
     output will instead go the console).

'--no-use-temp-file'
     Use popen, not a temporary file, to read the output of the
     preprocessor.  This is the default behaviour.

'-h'
'--help'
     Prints a usage summary.

'-V'
'--version'
     Prints the version number for 'windres'.

'--yydebug'
     If 'windres' is compiled with 'YYDEBUG' defined as '1', this will
     turn on parser debugging.


File: binutils.info,  Node: dlltool,  Next: readelf,  Prev: windres,  Up: Top

13 dlltool
**********

'dlltool' is used to create the files needed to create dynamic link
libraries (DLLs) on systems which understand PE format image files such
as Windows.  A DLL contains an export table which contains information
that the runtime loader needs to resolve references from a referencing
program.

   The export table is generated by this program by reading in a '.def'
file or scanning the '.a' and '.o' files which will be in the DLL. A
'.o' file can contain information in special '.drectve' sections with
export information.

     _Note:_ 'dlltool' is not always built as part of the binary
     utilities, since it is only useful for those targets which support
     DLLs.

     dlltool [-d|--input-def DEF-FILE-NAME]
             [-b|--base-file BASE-FILE-NAME]
             [-e|--output-exp EXPORTS-FILE-NAME]
             [-z|--output-def DEF-FILE-NAME]
             [-l|--output-lib LIBRARY-FILE-NAME]
             [-y|--output-delaylib LIBRARY-FILE-NAME]
             [--export-all-symbols] [--no-export-all-symbols]
             [--exclude-symbols LIST]
             [--no-default-excludes]
             [-S|--as PATH-TO-ASSEMBLER] [-f|--as-flags OPTIONS]
             [-D|--dllname NAME] [-m|--machine MACHINE]
             [-a|--add-indirect]
             [-U|--add-underscore] [--add-stdcall-underscore]
             [-k|--kill-at] [-A|--add-stdcall-alias]
             [-p|--ext-prefix-alias PREFIX]
             [-x|--no-idata4] [-c|--no-idata5]
             [--use-nul-prefixed-import-tables]
             [-I|--identify LIBRARY-FILE-NAME] [--identify-strict]
             [-i|--interwork]
             [-n|--nodelete] [-t|--temp-prefix PREFIX]
             [-v|--verbose]
             [-h|--help] [-V|--version]
             [--no-leading-underscore] [--leading-underscore]
             [object-file ...]

   'dlltool' reads its inputs, which can come from the '-d' and '-b'
options as well as object files specified on the command line.  It then
processes these inputs and if the '-e' option has been specified it
creates a exports file.  If the '-l' option has been specified it
creates a library file and if the '-z' option has been specified it
creates a def file.  Any or all of the '-e', '-l' and '-z' options can
be present in one invocation of dlltool.

   When creating a DLL, along with the source for the DLL, it is
necessary to have three other files.  'dlltool' can help with the
creation of these files.

   The first file is a '.def' file which specifies which functions are
exported from the DLL, which functions the DLL imports, and so on.  This
is a text file and can be created by hand, or 'dlltool' can be used to
create it using the '-z' option.  In this case 'dlltool' will scan the
object files specified on its command line looking for those functions
which have been specially marked as being exported and put entries for
them in the '.def' file it creates.

   In order to mark a function as being exported from a DLL, it needs to
have an '-export:<name_of_function>' entry in the '.drectve' section of
the object file.  This can be done in C by using the asm() operator:

       asm (".section .drectve");
       asm (".ascii \"-export:my_func\"");

       int my_func (void) { ... }

   The second file needed for DLL creation is an exports file.  This
file is linked with the object files that make up the body of the DLL
and it handles the interface between the DLL and the outside world.
This is a binary file and it can be created by giving the '-e' option to
'dlltool' when it is creating or reading in a '.def' file.

   The third file needed for DLL creation is the library file that
programs will link with in order to access the functions in the DLL (an
'import library').  This file can be created by giving the '-l' option
to dlltool when it is creating or reading in a '.def' file.

   If the '-y' option is specified, dlltool generates a delay-import
library that can be used instead of the normal import library to allow a
program to link to the dll only as soon as an imported function is
called for the first time.  The resulting executable will need to be
linked to the static delayimp library containing __delayLoadHelper2(),
which in turn will import LoadLibraryA and GetProcAddress from kernel32.

   'dlltool' builds the library file by hand, but it builds the exports
file by creating temporary files containing assembler statements and
then assembling these.  The '-S' command-line option can be used to
specify the path to the assembler that dlltool will use, and the '-f'
option can be used to pass specific flags to that assembler.  The '-n'
can be used to prevent dlltool from deleting these temporary assembler
files when it is done, and if '-n' is specified twice then this will
prevent dlltool from deleting the temporary object files it used to
build the library.

   Here is an example of creating a DLL from a source file 'dll.c' and
also creating a program (from an object file called 'program.o') that
uses that DLL:

       gcc -c dll.c
       dlltool -e exports.o -l dll.lib dll.o
       gcc dll.o exports.o -o dll.dll
       gcc program.o dll.lib -o program

   'dlltool' may also be used to query an existing import library to
determine the name of the DLL to which it is associated.  See the
description of the '-I' or '--identify' option.

   The command-line options have the following meanings:

'-d FILENAME'
'--input-def FILENAME'
     Specifies the name of a '.def' file to be read in and processed.

'-b FILENAME'
'--base-file FILENAME'
     Specifies the name of a base file to be read in and processed.  The
     contents of this file will be added to the relocation section in
     the exports file generated by dlltool.

'-e FILENAME'
'--output-exp FILENAME'
     Specifies the name of the export file to be created by dlltool.

'-z FILENAME'
'--output-def FILENAME'
     Specifies the name of the '.def' file to be created by dlltool.

'-l FILENAME'
'--output-lib FILENAME'
     Specifies the name of the library file to be created by dlltool.

'-y FILENAME'
'--output-delaylib FILENAME'
     Specifies the name of the delay-import library file to be created
     by dlltool.

'--export-all-symbols'
     Treat all global and weak defined symbols found in the input object
     files as symbols to be exported.  There is a small list of symbols
     which are not exported by default; see the '--no-default-excludes'
     option.  You may add to the list of symbols to not export by using
     the '--exclude-symbols' option.

'--no-export-all-symbols'
     Only export symbols explicitly listed in an input '.def' file or in
     '.drectve' sections in the input object files.  This is the default
     behaviour.  The '.drectve' sections are created by 'dllexport'
     attributes in the source code.

'--exclude-symbols LIST'
     Do not export the symbols in LIST.  This is a list of symbol names
     separated by comma or colon characters.  The symbol names should
     not contain a leading underscore.  This is only meaningful when
     '--export-all-symbols' is used.

'--no-default-excludes'
     When '--export-all-symbols' is used, it will by default avoid
     exporting certain special symbols.  The current list of symbols to
     avoid exporting is 'DllMain@12', 'DllEntryPoint@0', 'impure_ptr'.
     You may use the '--no-default-excludes' option to go ahead and
     export these special symbols.  This is only meaningful when
     '--export-all-symbols' is used.

'-S PATH'
'--as PATH'
     Specifies the path, including the filename, of the assembler to be
     used to create the exports file.

'-f OPTIONS'
'--as-flags OPTIONS'
     Specifies any specific command-line options to be passed to the
     assembler when building the exports file.  This option will work
     even if the '-S' option is not used.  This option only takes one
     argument, and if it occurs more than once on the command line, then
     later occurrences will override earlier occurrences.  So if it is
     necessary to pass multiple options to the assembler they should be
     enclosed in double quotes.

'-D NAME'
'--dll-name NAME'
     Specifies the name to be stored in the '.def' file as the name of
     the DLL when the '-e' option is used.  If this option is not
     present, then the filename given to the '-e' option will be used as
     the name of the DLL.

'-m MACHINE'
'-machine MACHINE'
     Specifies the type of machine for which the library file should be
     built.  'dlltool' has a built in default type, depending upon how
     it was created, but this option can be used to override that.  This
     is normally only useful when creating DLLs for an ARM processor,
     when the contents of the DLL are actually encode using Thumb
     instructions.

'-a'
'--add-indirect'
     Specifies that when 'dlltool' is creating the exports file it
     should add a section which allows the exported functions to be
     referenced without using the import library.  Whatever the hell
     that means!

'-U'
'--add-underscore'
     Specifies that when 'dlltool' is creating the exports file it
     should prepend an underscore to the names of _all_ exported
     symbols.

'--no-leading-underscore'
'--leading-underscore'
     Specifies whether standard symbol should be forced to be prefixed,
     or not.

'--add-stdcall-underscore'
     Specifies that when 'dlltool' is creating the exports file it
     should prepend an underscore to the names of exported _stdcall_
     functions.  Variable names and non-stdcall function names are not
     modified.  This option is useful when creating GNU-compatible
     import libs for third party DLLs that were built with MS-Windows
     tools.

'-k'
'--kill-at'
     Specifies that '@<number>' suffixes should be omitted from the
     names of stdcall functions that will be imported from the DLL. This
     is useful when creating an import library for a DLL which exports
     stdcall functions but without the usual '@<number>' symbol name
     suffix.

     This does not change the naming of symbols provided by the import
     library to programs linked against it, but only the entries in the
     import table (ie the .idata section).

'-A'
'--add-stdcall-alias'
     Specifies that when 'dlltool' is creating the exports file it
     should add aliases for stdcall symbols without '@ <number>' in
     addition to the symbols with '@ <number>'.

'-p'
'--ext-prefix-alias PREFIX'
     Causes 'dlltool' to create external aliases for all DLL imports
     with the specified prefix.  The aliases are created for both
     external and import symbols with no leading underscore.

'-x'
'--no-idata4'
     Specifies that when 'dlltool' is creating the exports and library
     files it should omit the '.idata4' section.  This is for
     compatibility with certain operating systems.

'--use-nul-prefixed-import-tables'
     Specifies that when 'dlltool' is creating the exports and library
     files it should prefix the '.idata4' and '.idata5' by zero an
     element.  This emulates old gnu import library generation of
     'dlltool'.  By default this option is turned off.

'-c'
'--no-idata5'
     Specifies that when 'dlltool' is creating the exports and library
     files it should omit the '.idata5' section.  This is for
     compatibility with certain operating systems.

'-I FILENAME'
'--identify FILENAME'
     Specifies that 'dlltool' should inspect the import library
     indicated by FILENAME and report, on 'stdout', the name(s) of the
     associated DLL(s).  This can be performed in addition to any other
     operations indicated by the other options and arguments.  'dlltool'
     fails if the import library does not exist or is not actually an
     import library.  See also '--identify-strict'.

'--identify-strict'
     Modifies the behavior of the '--identify' option, such that an
     error is reported if FILENAME is associated with more than one DLL.

'-i'
'--interwork'
     Specifies that 'dlltool' should mark the objects in the library
     file and exports file that it produces as supporting interworking
     between ARM and Thumb code.

'-n'
'--nodelete'
     Makes 'dlltool' preserve the temporary assembler files it used to
     create the exports file.  If this option is repeated then dlltool
     will also preserve the temporary object files it uses to create the
     library file.

'-t PREFIX'
'--temp-prefix PREFIX'
     Makes 'dlltool' use PREFIX when constructing the names of temporary
     assembler and object files.  By default, the temp file prefix is
     generated from the pid.

'-v'
'--verbose'
     Make dlltool describe what it is doing.

'-h'
'--help'
     Displays a list of command-line options and then exits.

'-V'
'--version'
     Displays dlltool's version number and then exits.

* Menu:

* def file format::             The format of the dlltool '.def' file


File: binutils.info,  Node: def file format,  Up: dlltool

13.1 The format of the 'dlltool' '.def' file
============================================

A '.def' file contains any number of the following commands:

'NAME' NAME '[ ,' BASE ']'
     The result is going to be named NAME'.exe'.

'LIBRARY' NAME '[ ,' BASE ']'
     The result is going to be named NAME'.dll'.  Note: If you want to
     use LIBRARY as name then you need to quote.  Otherwise this will
     fail due a necessary hack for libtool (see PR binutils/13710 for
     more details).

'EXPORTS ( ( (' NAME1 '[ = ' NAME2 '] ) | ( ' NAME1 '=' MODULE-NAME '.' EXTERNAL-NAME ') ) [ == ' ITS_NAME ']'
'[' INTEGER '] [ NONAME ] [ CONSTANT ] [ DATA ] [ PRIVATE ] ) *'
     Declares NAME1 as an exported symbol from the DLL, with optional
     ordinal number INTEGER, or declares NAME1 as an alias (forward) of
     the function EXTERNAL-NAME in the DLL. If ITS_NAME is specified,
     this name is used as string in export table.  MODULE-NAME.  Note:
     The 'EXPORTS' has to be the last command in .def file, as keywords
     are treated - beside 'LIBRARY' - as simple name-identifiers.  If
     you want to use LIBRARY as name then you need to quote it.

'IMPORTS ( (' INTERNAL-NAME '=' MODULE-NAME '.' INTEGER ') | [' INTERNAL-NAME '= ]' MODULE-NAME '.' EXTERNAL-NAME ') [ == ) ITS_NAME ] *'
     Declares that EXTERNAL-NAME or the exported function whose ordinal
     number is INTEGER is to be imported from the file MODULE-NAME.  If
     INTERNAL-NAME is specified then this is the name that the imported
     function will be referred to in the body of the DLL. If ITS_NAME is
     specified, this name is used as string in import table.  Note: The
     'IMPORTS' has to be the last command in .def file, as keywords are
     treated - beside 'LIBRARY' - as simple name-identifiers.  If you
     want to use LIBRARY as name then you need to quote it.

'DESCRIPTION' STRING
     Puts STRING into the output '.exp' file in the '.rdata' section.

'STACKSIZE' NUMBER-RESERVE '[, ' NUMBER-COMMIT ']'
'HEAPSIZE' NUMBER-RESERVE '[, ' NUMBER-COMMIT ']'
     Generates '--stack' or '--heap' NUMBER-RESERVE,NUMBER-COMMIT in the
     output '.drectve' section.  The linker will see this and act upon
     it.

'CODE' ATTR '+'
'DATA' ATTR '+'
'SECTIONS (' SECTION-NAME ATTR' + ) *'
     Generates '--attr' SECTION-NAME ATTR in the output '.drectve'
     section, where ATTR is one of 'READ', 'WRITE', 'EXECUTE' or
     'SHARED'.  The linker will see this and act upon it.


File: binutils.info,  Node: readelf,  Next: elfedit,  Prev: dlltool,  Up: Top

14 readelf
**********

     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]
             [--ctf=SECTION]
             [--ctf-parent=SECTION]
             [--ctf-symbols=SECTION]
             [--ctf-strings=SECTION]
             [-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',
     '--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.  If
     support is not yet implemented for your architecture you could try
     dumping the contents of the .EH_FRAMES section using the
     '--debug-dump=frames' or '--debug-dump=frames-interp' options.

'-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.  *Note ar::.

'-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 any links to
          separate dwarf object files (dwo), if they are 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 linked, separate debug info file(s).  This can result
          in multiple versions of the same debug section being displayed
          if it exists in more than one file.

          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'.

'--ctf=SECTION'

     Display the contents of the specified CTF section.  CTF sections
     themselves contain many subsections, all of which are displayed in
     order.

'--ctf-parent=SECTION'

     Specify the name of another section from which the CTF dictionary
     can inherit types.  (If none is specified, we assume the CTF
     dictionary inherits types from the default-named member of the
     archive contained within this section.)
'--ctf-symbols=SECTION'
'--ctf-strings=SECTION'
     Specify the name of another section from which the CTF file can
     inherit strings and symbols.  By default, the '.symtab' and its
     linked string table are used.

     If either of '--ctf-symbols' or '--ctf-strings' is specified, the
     other must be specified as well.

'-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: binutils.info,  Node: elfedit,  Next: Common Options,  Prev: readelf,  Up: Top

15 elfedit
**********

     elfedit [--input-mach=MACHINE]
             [--input-type=TYPE]
             [--input-osabi=OSABI]
             --output-mach=MACHINE
             --output-type=TYPE
             --output-osabi=OSABI
             --enable-x86-feature=FEATURE
             --disable-x86-feature=FEATURE
             [-v|--version]
             [-h|--help]
             ELFFILE...

   'elfedit' updates the ELF header and program property of ELF files
which have the matching ELF machine and file types.  The options control
how and which fields in the ELF header and program property should be
updated.

   ELFFILE... are the ELF files to be updated.  32-bit and 64-bit ELF
files are supported, as are archives containing ELF files.

   The long and short forms of options, shown here as alternatives, are
equivalent.  At least one of the '--output-mach', '--output-type',
'--output-osabi', '--enable-x86-feature' and '--disable-x86-feature'
options must be given.

'--input-mach=MACHINE'
     Set the matching input ELF machine type to MACHINE.  If
     '--input-mach' isn't specified, it will match any ELF machine
     types.

     The supported ELF machine types are, I386, IAMCU, L1OM, K1OM and
     X86-64.

'--output-mach=MACHINE'
     Change the ELF machine type in the ELF header to MACHINE.  The
     supported ELF machine types are the same as '--input-mach'.

'--input-type=TYPE'
     Set the matching input ELF file type to TYPE.  If '--input-type'
     isn't specified, it will match any ELF file types.

     The supported ELF file types are, REL, EXEC and DYN.

'--output-type=TYPE'
     Change the ELF file type in the ELF header to TYPE.  The supported
     ELF types are the same as '--input-type'.

'--input-osabi=OSABI'
     Set the matching input ELF file OSABI to OSABI.  If '--input-osabi'
     isn't specified, it will match any ELF OSABIs.

     The supported ELF OSABIs are, NONE, HPUX, NETBSD, GNU, LINUX (alias
     for GNU), SOLARIS, AIX, IRIX, FREEBSD, TRU64, MODESTO, OPENBSD,
     OPENVMS, NSK, AROS and FENIXOS.

'--output-osabi=OSABI'
     Change the ELF OSABI in the ELF header to OSABI.  The supported ELF
     OSABI are the same as '--input-osabi'.

'--enable-x86-feature=FEATURE'
     Set the FEATURE bit in program property in EXEC or DYN ELF files
     with machine types of I386 or X86-64.  The supported features are,
     IBT and SHSTK.

'--disable-x86-feature=FEATURE'
     Clear the FEATURE bit in program property in EXEC or DYN ELF files
     with machine types of I386 or X86-64.  The supported features are
     the same as '--enable-x86-feature'.

     Note: '--enable-x86-feature' and '--disable-x86-feature' are
     available only on hosts with 'mmap' support.

'-v'
'--version'
     Display the version number of 'elfedit'.

'-h'
'--help'
     Display the command-line options understood by 'elfedit'.


File: binutils.info,  Node: Common Options,  Next: Selecting the Target System,  Prev: elfedit,  Up: Top

16 Common Options
*****************

The following command-line options are supported by all of the programs
described in this manual.

'@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.

'--help'
     Display the command-line options supported by the program.

'--version'
     Display the version number of the program.


File: binutils.info,  Node: Selecting the Target System,  Next: debuginfod,  Prev: Common Options,  Up: Top

17 Selecting the Target System
******************************

You can specify two aspects of the target system to the GNU binary file
utilities, each in several ways:

   * the target

   * the architecture

   In the following summaries, the lists of ways to specify values are
in order of decreasing precedence.  The ways listed first override those
listed later.

   The commands to list valid values only list the values for which the
programs you are running were configured.  If they were configured with
'--enable-targets=all', the commands list most of the available values,
but a few are left out; not all targets can be configured in at once
because some of them can only be configured "native" (on hosts with the
same type as the target system).

* Menu:

* Target Selection::
* Architecture Selection::


File: binutils.info,  Node: Target Selection,  Next: Architecture Selection,  Up: Selecting the Target System

17.1 Target Selection
=====================

A "target" is an object file format.  A given target may be supported
for multiple architectures (*note Architecture Selection::).  A target
selection may also have variations for different operating systems or
architectures.

   The command to list valid target values is 'objdump -i' (the first
column of output contains the relevant information).

   Some sample values are: 'a.out-hp300bsd', 'ecoff-littlemips',
'a.out-sunos-big'.

   You can also specify a target using a configuration triplet.  This is
the same sort of name that is passed to 'configure' to specify a target.
When you use a configuration triplet as an argument, it must be fully
canonicalized.  You can see the canonical version of a triplet by
running the shell script 'config.sub' which is included with the
sources.

   Some sample configuration triplets are: 'm68k-hp-bsd',
'mips-dec-ultrix', 'sparc-sun-sunos'.

'objdump' Target
----------------

Ways to specify:

  1. command-line option: '-b' or '--target'

  2. environment variable 'GNUTARGET'

  3. deduced from the input file

'objcopy' and 'strip' Input Target
----------------------------------

Ways to specify:

  1. command-line options: '-I' or '--input-target', or '-F' or
     '--target'

  2. environment variable 'GNUTARGET'

  3. deduced from the input file

'objcopy' and 'strip' Output Target
-----------------------------------

Ways to specify:

  1. command-line options: '-O' or '--output-target', or '-F' or
     '--target'

  2. the input target (see "'objcopy' and 'strip' Input Target" above)

  3. environment variable 'GNUTARGET'

  4. deduced from the input file

'nm', 'size', and 'strings' Target
----------------------------------

Ways to specify:

  1. command-line option: '--target'

  2. environment variable 'GNUTARGET'

  3. deduced from the input file


File: binutils.info,  Node: Architecture Selection,  Prev: Target Selection,  Up: Selecting the Target System

17.2 Architecture Selection
===========================

An "architecture" is a type of CPU on which an object file is to run.
Its name may contain a colon, separating the name of the processor
family from the name of the particular CPU.

   The command to list valid architecture values is 'objdump -i' (the
second column contains the relevant information).

   Sample values: 'm68k:68020', 'mips:3000', 'sparc'.

'objdump' Architecture
----------------------

Ways to specify:

  1. command-line option: '-m' or '--architecture'

  2. deduced from the input file

'objcopy', 'nm', 'size', 'strings' Architecture
-----------------------------------------------

Ways to specify:

  1. deduced from the input file


File: binutils.info,  Node: debuginfod,  Next: Reporting Bugs,  Prev: Selecting the Target System,  Up: Top

18 debuginfod
*************

debuginfod is a web service that indexes ELF/DWARF debugging resources
by build-id and serves them over HTTP.

   Binutils can be built with the debuginfod client library
'libdebuginfod' using the '--with-debuginfod' configure option.  This
option is enabled by default if 'libdebuginfod' is installed and found
at configure time.  This allows 'objdump' and 'readelf' to automatically
query debuginfod servers for separate debug files when the files are
otherwise not found.

   debuginfod is packaged with elfutils, starting with version 0.178.
You can get the latest version from 'https://sourceware.org/elfutils/'.


File: binutils.info,  Node: Reporting Bugs,  Next: GNU Free Documentation License,  Prev: debuginfod,  Up: Top

19 Reporting Bugs
*****************

Your bug reports play an essential role in making the binary utilities
reliable.

   Reporting a bug may help you by bringing a solution to your problem,
or it may not.  But in any case the principal function of a bug report
is to help the entire community by making the next version of the binary
utilities work better.  Bug reports are your contribution to their
maintenance.

   In order for a bug report to serve its purpose, you must include the
information that enables us to fix the bug.

* Menu:

* Bug Criteria::                Have you found a bug?
* Bug Reporting::               How to report bugs


File: binutils.info,  Node: Bug Criteria,  Next: Bug Reporting,  Up: Reporting Bugs

19.1 Have You Found a Bug?
==========================

If you are not sure whether you have found a bug, here are some
guidelines:

   * If a binary utility gets a fatal signal, for any input whatever,
     that is a bug.  Reliable utilities never crash.

   * If a binary utility produces an error message for valid input, that
     is a bug.

   * If you are an experienced user of binary utilities, your
     suggestions for improvement are welcome in any case.


File: binutils.info,  Node: Bug Reporting,  Prev: Bug Criteria,  Up: Reporting Bugs

19.2 How to Report Bugs
=======================

A number of companies and individuals offer support for GNU products.
If you obtained the binary utilities from a support organization, we
recommend you contact that organization first.

   You can find contact information for many support companies and
individuals in the file 'etc/SERVICE' in the GNU Emacs distribution.

   In any event, we also recommend that you send bug reports for the
binary utilities to <http://www.sourceware.org/bugzilla/>.

   The fundamental principle of reporting bugs usefully is this: *report
all the facts*.  If you are not sure whether to state a fact or leave it
out, state it!

   Often people omit facts because they think they know what causes the
problem and assume that some details do not matter.  Thus, you might
assume that the name of a file you use in an example does not matter.
Well, probably it does not, but one cannot be sure.  Perhaps the bug is
a stray memory reference which happens to fetch from the location where
that pathname is stored in memory; perhaps, if the pathname were
different, the contents of that location would fool the utility into
doing the right thing despite the bug.  Play it safe and give a
specific, complete example.  That is the easiest thing for you to do,
and the most helpful.

   Keep in mind that the purpose of a bug report is to enable us to fix
the bug if it is new to us.  Therefore, always write your bug reports on
the assumption that the bug has not been reported previously.

   Sometimes people give a few sketchy facts and ask, "Does this ring a
bell?"  This cannot help us fix a bug, so it is basically useless.  We
respond by asking for enough details to enable us to investigate.  You
might as well expedite matters by sending them to begin with.

   To enable us to fix the bug, you should include all these things:

   * The version of the utility.  Each utility announces it if you start
     it with the '--version' argument.

     Without this, we will not know whether there is any point in
     looking for the bug in the current version of the binary utilities.

   * Any patches you may have applied to the source, including any
     patches made to the 'BFD' library.

   * The type of machine you are using, and the operating system name
     and version number.

   * What compiler (and its version) was used to compile the
     utilities--e.g.  "'gcc-2.7'".

   * The command arguments you gave the utility to observe the bug.  To
     guarantee you will not omit something important, list them all.  A
     copy of the Makefile (or the output from make) is sufficient.

     If we were to try to guess the arguments, we would probably guess
     wrong and then we might not encounter the bug.

   * A complete input file, or set of input files, that will reproduce
     the bug.  If the utility is reading an object file or files, then
     it is generally most helpful to send the actual object files.

     If the source files were produced exclusively using GNU programs
     (e.g., 'gcc', 'gas', and/or the GNU 'ld'), then it may be OK to
     send the source files rather than the object files.  In this case,
     be sure to say exactly what version of 'gcc', or whatever, was used
     to produce the object files.  Also say how 'gcc', or whatever, was
     configured.

   * A description of what behavior you observe that you believe is
     incorrect.  For example, "It gets a fatal signal."

     Of course, if the bug is that the utility gets a fatal signal, then
     we will certainly notice it.  But if the bug is incorrect output,
     we might not notice unless it is glaringly wrong.  You might as
     well not give us a chance to make a mistake.

     Even if the problem you experience is a fatal signal, you should
     still say so explicitly.  Suppose something strange is going on,
     such as your copy of the utility is out of sync, or you have
     encountered a bug in the C library on your system.  (This has
     happened!)  Your copy might crash and ours would not.  If you told
     us to expect a crash, then when ours fails to crash, we would know
     that the bug was not happening for us.  If you had not told us to
     expect a crash, then we would not be able to draw any conclusion
     from our observations.

   * If you wish to suggest changes to the source, send us context
     diffs, as generated by 'diff' with the '-u', '-c', or '-p' option.
     Always send diffs from the old file to the new file.  If you wish
     to discuss something in the 'ld' source, refer to it by context,
     not by line number.

     The line numbers in our development sources will not match those in
     your sources.  Your line numbers would convey no useful information
     to us.

   Here are some things that are not necessary:

   * A description of the envelope of the bug.

     Often people who encounter a bug spend a lot of time investigating
     which changes to the input file will make the bug go away and which
     changes will not affect it.

     This is often time consuming and not very useful, because the way
     we will find the bug is by running a single example under the
     debugger with breakpoints, not by pure deduction from a series of
     examples.  We recommend that you save your time for something else.

     Of course, if you can find a simpler example to report _instead_ of
     the original one, that is a convenience for us.  Errors in the
     output will be easier to spot, running under the debugger will take
     less time, and so on.

     However, simplification is not vital; if you do not want to do
     this, report the bug anyway and send us the entire test case you
     used.

   * A patch for the bug.

     A patch for the bug does help us if it is a good one.  But do not
     omit the necessary information, such as the test case, on the
     assumption that a patch is all we need.  We might see problems with
     your patch and decide to fix the problem another way, or we might
     not understand it at all.

     Sometimes with programs as complicated as the binary utilities it
     is very hard to construct an example that will make the program
     follow a certain path through the code.  If you do not send us the
     example, we will not be able to construct one, so we will not be
     able to verify that the bug is fixed.

     And if we cannot understand what bug you are trying to fix, or why
     your patch should be an improvement, we will not install it.  A
     test case will help us to understand.

   * A guess about what the bug is or what it depends on.

     Such guesses are usually wrong.  Even we cannot guess right about
     such things without first using the debugger to find the facts.


File: binutils.info,  Node: GNU Free Documentation License,  Next: Binutils Index,  Prev: Reporting Bugs,  Up: Top

Appendix A GNU Free Documentation License
*****************************************

                     Version 1.3, 3 November 2008

     Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
     <http://fsf.org/>

     Everyone is permitted to copy and distribute verbatim copies
     of this license document, but changing it is not allowed.

  0. PREAMBLE

     The purpose of this License is to make a manual, textbook, or other
     functional and useful document "free" in the sense of freedom: to
     assure everyone the effective freedom to copy and redistribute it,
     with or without modifying it, either commercially or
     noncommercially.  Secondarily, this License preserves for the
     author and publisher a way to get credit for their work, while not
     being considered responsible for modifications made by others.

     This License is a kind of "copyleft", which means that derivative
     works of the document must themselves be free in the same sense.
     It complements the GNU General Public License, which is a copyleft
     license designed for free software.

     We have designed this License in order to use it for manuals for
     free software, because free software needs free documentation: a
     free program should come with manuals providing the same freedoms
     that the software does.  But this License is not limited to
     software manuals; it can be used for any textual work, regardless
     of subject matter or whether it is published as a printed book.  We
     recommend this License principally for works whose purpose is
     instruction or reference.

  1. APPLICABILITY AND DEFINITIONS

     This License applies to any manual or other work, in any medium,
     that contains a notice placed by the copyright holder saying it can
     be distributed under the terms of this License.  Such a notice
     grants a world-wide, royalty-free license, unlimited in duration,
     to use that work under the conditions stated herein.  The
     "Document", below, refers to any such manual or work.  Any member
     of the public is a licensee, and is addressed as "you".  You accept
     the license if you copy, modify or distribute the work in a way
     requiring permission under copyright law.

     A "Modified Version" of the Document means any work containing the
     Document or a portion of it, either copied verbatim, or with
     modifications and/or translated into another language.

     A "Secondary Section" is a named appendix or a front-matter section
     of the Document that deals exclusively with the relationship of the
     publishers or authors of the Document to the Document's overall
     subject (or to related matters) and contains nothing that could
     fall directly within that overall subject.  (Thus, if the Document
     is in part a textbook of mathematics, a Secondary Section may not
     explain any mathematics.)  The relationship could be a matter of
     historical connection with the subject or with related matters, or
     of legal, commercial, philosophical, ethical or political position
     regarding them.

     The "Invariant Sections" are certain Secondary Sections whose
     titles are designated, as being those of Invariant Sections, in the
     notice that says that the Document is released under this License.
     If a section does not fit the above definition of Secondary then it
     is not allowed to be designated as Invariant.  The Document may
     contain zero Invariant Sections.  If the Document does not identify
     any Invariant Sections then there are none.

     The "Cover Texts" are certain short passages of text that are
     listed, as Front-Cover Texts or Back-Cover Texts, in the notice
     that says that the Document is released under this License.  A
     Front-Cover Text may be at most 5 words, and a Back-Cover Text may
     be at most 25 words.

     A "Transparent" copy of the Document means a machine-readable copy,
     represented in a format whose specification is available to the
     general public, that is suitable for revising the document
     straightforwardly with generic text editors or (for images composed
     of pixels) generic paint programs or (for drawings) some widely
     available drawing editor, and that is suitable for input to text
     formatters or for automatic translation to a variety of formats
     suitable for input to text formatters.  A copy made in an otherwise
     Transparent file format whose markup, or absence of markup, has
     been arranged to thwart or discourage subsequent modification by
     readers is not Transparent.  An image format is not Transparent if
     used for any substantial amount of text.  A copy that is not
     "Transparent" is called "Opaque".

     Examples of suitable formats for Transparent copies include plain
     ASCII without markup, Texinfo input format, LaTeX input format,
     SGML or XML using a publicly available DTD, and standard-conforming
     simple HTML, PostScript or PDF designed for human modification.
     Examples of transparent image formats include PNG, XCF and JPG.
     Opaque formats include proprietary formats that can be read and
     edited only by proprietary word processors, SGML or XML for which
     the DTD and/or processing tools are not generally available, and
     the machine-generated HTML, PostScript or PDF produced by some word
     processors for output purposes only.

     The "Title Page" means, for a printed book, the title page itself,
     plus such following pages as are needed to hold, legibly, the
     material this License requires to appear in the title page.  For
     works in formats which do not have any title page as such, "Title
     Page" means the text near the most prominent appearance of the
     work's title, preceding the beginning of the body of the text.

     The "publisher" means any person or entity that distributes copies
     of the Document to the public.

     A section "Entitled XYZ" means a named subunit of the Document
     whose title either is precisely XYZ or contains XYZ in parentheses
     following text that translates XYZ in another language.  (Here XYZ
     stands for a specific section name mentioned below, such as
     "Acknowledgements", "Dedications", "Endorsements", or "History".)
     To "Preserve the Title" of such a section when you modify the
     Document means that it remains a section "Entitled XYZ" according
     to this definition.

     The Document may include Warranty Disclaimers next to the notice
     which states that this License applies to the Document.  These
     Warranty Disclaimers are considered to be included by reference in
     this License, but only as regards disclaiming warranties: any other
     implication that these Warranty Disclaimers may have is void and
     has no effect on the meaning of this License.

  2. VERBATIM COPYING

     You may copy and distribute the Document in any medium, either
     commercially or noncommercially, provided that this License, the
     copyright notices, and the license notice saying this License
     applies to the Document are reproduced in all copies, and that you
     add no other conditions whatsoever to those of this License.  You
     may not use technical measures to obstruct or control the reading
     or further copying of the copies you make or distribute.  However,
     you may accept compensation in exchange for copies.  If you
     distribute a large enough number of copies you must also follow the
     conditions in section 3.

     You may also lend copies, under the same conditions stated above,
     and you may publicly display copies.

  3. COPYING IN QUANTITY

     If you publish printed copies (or copies in media that commonly
     have printed covers) of the Document, numbering more than 100, and
     the Document's license notice requires Cover Texts, you must
     enclose the copies in covers that carry, clearly and legibly, all
     these Cover Texts: Front-Cover Texts on the front cover, and
     Back-Cover Texts on the back cover.  Both covers must also clearly
     and legibly identify you as the publisher of these copies.  The
     front cover must present the full title with all words of the title
     equally prominent and visible.  You may add other material on the
     covers in addition.  Copying with changes limited to the covers, as
     long as they preserve the title of the Document and satisfy these
     conditions, can be treated as verbatim copying in other respects.

     If the required texts for either cover are too voluminous to fit
     legibly, you should put the first ones listed (as many as fit
     reasonably) on the actual cover, and continue the rest onto
     adjacent pages.

     If you publish or distribute Opaque copies of the Document
     numbering more than 100, you must either include a machine-readable
     Transparent copy along with each Opaque copy, or state in or with
     each Opaque copy a computer-network location from which the general
     network-using public has access to download using public-standard
     network protocols a complete Transparent copy of the Document, free
     of added material.  If you use the latter option, you must take
     reasonably prudent steps, when you begin distribution of Opaque
     copies in quantity, to ensure that this Transparent copy will
     remain thus accessible at the stated location until at least one
     year after the last time you distribute an Opaque copy (directly or
     through your agents or retailers) of that edition to the public.

     It is requested, but not required, that you contact the authors of
     the Document well before redistributing any large number of copies,
     to give them a chance to provide you with an updated version of the
     Document.

  4. MODIFICATIONS

     You may copy and distribute a Modified Version of the Document
     under the conditions of sections 2 and 3 above, provided that you
     release the Modified Version under precisely this License, with the
     Modified Version filling the role of the Document, thus licensing
     distribution and modification of the Modified Version to whoever
     possesses a copy of it.  In addition, you must do these things in
     the Modified Version:

       A. Use in the Title Page (and on the covers, if any) a title
          distinct from that of the Document, and from those of previous
          versions (which should, if there were any, be listed in the
          History section of the Document).  You may use the same title
          as a previous version if the original publisher of that
          version gives permission.

       B. List on the Title Page, as authors, one or more persons or
          entities responsible for authorship of the modifications in
          the Modified Version, together with at least five of the
          principal authors of the Document (all of its principal
          authors, if it has fewer than five), unless they release you
          from this requirement.

       C. State on the Title page the name of the publisher of the
          Modified Version, as the publisher.

       D. Preserve all the copyright notices of the Document.

       E. Add an appropriate copyright notice for your modifications
          adjacent to the other copyright notices.

       F. Include, immediately after the copyright notices, a license
          notice giving the public permission to use the Modified
          Version under the terms of this License, in the form shown in
          the Addendum below.

       G. Preserve in that license notice the full lists of Invariant
          Sections and required Cover Texts given in the Document's
          license notice.

       H. Include an unaltered copy of this License.

       I. Preserve the section Entitled "History", Preserve its Title,
          and add to it an item stating at least the title, year, new
          authors, and publisher of the Modified Version as given on the
          Title Page.  If there is no section Entitled "History" in the
          Document, create one stating the title, year, authors, and
          publisher of the Document as given on its Title Page, then add
          an item describing the Modified Version as stated in the
          previous sentence.

       J. Preserve the network location, if any, given in the Document
          for public access to a Transparent copy of the Document, and
          likewise the network locations given in the Document for
          previous versions it was based on.  These may be placed in the
          "History" section.  You may omit a network location for a work
          that was published at least four years before the Document
          itself, or if the original publisher of the version it refers
          to gives permission.

       K. For any section Entitled "Acknowledgements" or "Dedications",
          Preserve the Title of the section, and preserve in the section
          all the substance and tone of each of the contributor
          acknowledgements and/or dedications given therein.

       L. Preserve all the Invariant Sections of the Document, unaltered
          in their text and in their titles.  Section numbers or the
          equivalent are not considered part of the section titles.

       M. Delete any section Entitled "Endorsements".  Such a section
          may not be included in the Modified Version.

       N. Do not retitle any existing section to be Entitled
          "Endorsements" or to conflict in title with any Invariant
          Section.

       O. Preserve any Warranty Disclaimers.

     If the Modified Version includes new front-matter sections or
     appendices that qualify as Secondary Sections and contain no
     material copied from the Document, you may at your option designate
     some or all of these sections as invariant.  To do this, add their
     titles to the list of Invariant Sections in the Modified Version's
     license notice.  These titles must be distinct from any other
     section titles.

     You may add a section Entitled "Endorsements", provided it contains
     nothing but endorsements of your Modified Version by various
     parties--for example, statements of peer review or that the text
     has been approved by an organization as the authoritative
     definition of a standard.

     You may add a passage of up to five words as a Front-Cover Text,
     and a passage of up to 25 words as a Back-Cover Text, to the end of
     the list of Cover Texts in the Modified Version.  Only one passage
     of Front-Cover Text and one of Back-Cover Text may be added by (or
     through arrangements made by) any one entity.  If the Document
     already includes a cover text for the same cover, previously added
     by you or by arrangement made by the same entity you are acting on
     behalf of, you may not add another; but you may replace the old
     one, on explicit permission from the previous publisher that added
     the old one.

     The author(s) and publisher(s) of the Document do not by this
     License give permission to use their names for publicity for or to
     assert or imply endorsement of any Modified Version.

  5. COMBINING DOCUMENTS

     You may combine the Document with other documents released under
     this License, under the terms defined in section 4 above for
     modified versions, provided that you include in the combination all
     of the Invariant Sections of all of the original documents,
     unmodified, and list them all as Invariant Sections of your
     combined work in its license notice, and that you preserve all
     their Warranty Disclaimers.

     The combined work need only contain one copy of this License, and
     multiple identical Invariant Sections may be replaced with a single
     copy.  If there are multiple Invariant Sections with the same name
     but different contents, make the title of each such section unique
     by adding at the end of it, in parentheses, the name of the
     original author or publisher of that section if known, or else a
     unique number.  Make the same adjustment to the section titles in
     the list of Invariant Sections in the license notice of the
     combined work.

     In the combination, you must combine any sections Entitled
     "History" in the various original documents, forming one section
     Entitled "History"; likewise combine any sections Entitled
     "Acknowledgements", and any sections Entitled "Dedications".  You
     must delete all sections Entitled "Endorsements."

  6. COLLECTIONS OF DOCUMENTS

     You may make a collection consisting of the Document and other
     documents released under this License, and replace the individual
     copies of this License in the various documents with a single copy
     that is included in the collection, provided that you follow the
     rules of this License for verbatim copying of each of the documents
     in all other respects.

     You may extract a single document from such a collection, and
     distribute it individually under this License, provided you insert
     a copy of this License into the extracted document, and follow this
     License in all other respects regarding verbatim copying of that
     document.

  7. AGGREGATION WITH INDEPENDENT WORKS

     A compilation of the Document or its derivatives with other
     separate and independent documents or works, in or on a volume of a
     storage or distribution medium, is called an "aggregate" if the
     copyright resulting from the compilation is not used to limit the
     legal rights of the compilation's users beyond what the individual
     works permit.  When the Document is included in an aggregate, this
     License does not apply to the other works in the aggregate which
     are not themselves derivative works of the Document.

     If the Cover Text requirement of section 3 is applicable to these
     copies of the Document, then if the Document is less than one half
     of the entire aggregate, the Document's Cover Texts may be placed
     on covers that bracket the Document within the aggregate, or the
     electronic equivalent of covers if the Document is in electronic
     form.  Otherwise they must appear on printed covers that bracket
     the whole aggregate.

  8. TRANSLATION

     Translation is considered a kind of modification, so you may
     distribute translations of the Document under the terms of section
     4.  Replacing Invariant Sections with translations requires special
     permission from their copyright holders, but you may include
     translations of some or all Invariant Sections in addition to the
     original versions of these Invariant Sections.  You may include a
     translation of this License, and all the license notices in the
     Document, and any Warranty Disclaimers, provided that you also
     include the original English version of this License and the
     original versions of those notices and disclaimers.  In case of a
     disagreement between the translation and the original version of
     this License or a notice or disclaimer, the original version will
     prevail.

     If a section in the Document is Entitled "Acknowledgements",
     "Dedications", or "History", the requirement (section 4) to
     Preserve its Title (section 1) will typically require changing the
     actual title.

  9. TERMINATION

     You may not copy, modify, sublicense, or distribute the Document
     except as expressly provided under this License.  Any attempt
     otherwise to copy, modify, sublicense, or distribute it is void,
     and will automatically terminate your rights under this License.

     However, if you cease all violation of this License, then your
     license from a particular copyright holder is reinstated (a)
     provisionally, unless and until the copyright holder explicitly and
     finally terminates your license, and (b) permanently, if the
     copyright holder fails to notify you of the violation by some
     reasonable means prior to 60 days after the cessation.

     Moreover, your license from a particular copyright holder is
     reinstated permanently if the copyright holder notifies you of the
     violation by some reasonable means, this is the first time you have
     received notice of violation of this License (for any work) from
     that copyright holder, and you cure the violation prior to 30 days
     after your receipt of the notice.

     Termination of your rights under this section does not terminate
     the licenses of parties who have received copies or rights from you
     under this License.  If your rights have been terminated and not
     permanently reinstated, receipt of a copy of some or all of the
     same material does not give you any rights to use it.

  10. FUTURE REVISIONS OF THIS LICENSE

     The Free Software Foundation may publish new, revised versions of
     the GNU Free Documentation License from time to time.  Such new
     versions will be similar in spirit to the present version, but may
     differ in detail to address new problems or concerns.  See
     <http://www.gnu.org/copyleft/>.

     Each version of the License is given a distinguishing version
     number.  If the Document specifies that a particular numbered
     version of this License "or any later version" applies to it, you
     have the option of following the terms and conditions either of
     that specified version or of any later version that has been
     published (not as a draft) by the Free Software Foundation.  If the
     Document does not specify a version number of this License, you may
     choose any version ever published (not as a draft) by the Free
     Software Foundation.  If the Document specifies that a proxy can
     decide which future versions of this License can be used, that
     proxy's public statement of acceptance of a version permanently
     authorizes you to choose that version for the Document.

  11. RELICENSING

     "Massive Multiauthor Collaboration Site" (or "MMC Site") means any
     World Wide Web server that publishes copyrightable works and also
     provides prominent facilities for anybody to edit those works.  A
     public wiki that anybody can edit is an example of such a server.
     A "Massive Multiauthor Collaboration" (or "MMC") contained in the
     site means any set of copyrightable works thus published on the MMC
     site.

     "CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
     license published by Creative Commons Corporation, a not-for-profit
     corporation with a principal place of business in San Francisco,
     California, as well as future copyleft versions of that license
     published by that same organization.

     "Incorporate" means to publish or republish a Document, in whole or
     in part, as part of another Document.

     An MMC is "eligible for relicensing" if it is licensed under this
     License, and if all works that were first published under this
     License somewhere other than this MMC, and subsequently
     incorporated in whole or in part into the MMC, (1) had no cover
     texts or invariant sections, and (2) were thus incorporated prior
     to November 1, 2008.

     The operator of an MMC Site may republish an MMC contained in the
     site under CC-BY-SA on the same site at any time before August 1,
     2009, provided the MMC is eligible for relicensing.

ADDENDUM: How to use this License for your documents
====================================================

To use this License in a document you have written, include a copy of
the License in the document and put the following copyright and license
notices just after the title page:

       Copyright (C)  YEAR  YOUR NAME.
       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, no Front-Cover Texts, and no Back-Cover
       Texts.  A copy of the license is included in the section entitled ``GNU
       Free Documentation License''.

   If you have Invariant Sections, Front-Cover Texts and Back-Cover
Texts, replace the "with...Texts."  line with this:

         with the Invariant Sections being LIST THEIR TITLES, with
         the Front-Cover Texts being LIST, and with the Back-Cover Texts
         being LIST.

   If you have Invariant Sections without Cover Texts, or some other
combination of the three, merge those two alternatives to suit the
situation.

   If your document contains nontrivial examples of program code, we
recommend releasing these examples in parallel under your choice of free
software license, such as the GNU General Public License, to permit
their use in free software.


File: binutils.info,  Node: Binutils Index,  Prev: GNU Free Documentation License,  Up: Top

Binutils Index
**************

�[index�]
* Menu:

* -enable-deterministic-archives:        ar cmdline.          (line 150)
* -enable-deterministic-archives <1>:    ar cmdline.          (line 233)
* -enable-deterministic-archives <2>:    objcopy.             (line 355)
* -enable-deterministic-archives <3>:    objcopy.             (line 365)
* -enable-deterministic-archives <4>:    ranlib.              (line  32)
* -enable-deterministic-archives <5>:    ranlib.              (line  44)
* -enable-deterministic-archives <6>:    strip.               (line 155)
* -enable-deterministic-archives <7>:    strip.               (line 165)
* .stab:                                 objdump.             (line 684)
* Add prefix to absolute paths:          objdump.             (line 497)
* addr2line:                             addr2line.           (line   6)
* address to file name and line number:  addr2line.           (line   6)
* all header information, object file:   objdump.             (line 806)
* ar:                                    ar.                  (line   6)
* ar compatibility:                      ar.                  (line  60)
* architecture:                          objdump.             (line 250)
* architectures available:               objdump.             (line 235)
* archive contents:                      ranlib.              (line   6)
* Archive file symbol index information: readelf.             (line 183)
* archive headers:                       objdump.             (line  74)
* archives:                              ar.                  (line   6)
* base files:                            dlltool.             (line 124)
* bug criteria:                          Bug Criteria.        (line   6)
* bug reports:                           Bug Reporting.       (line   6)
* bugs:                                  Reporting Bugs.      (line   6)
* bugs, reporting:                       Bug Reporting.       (line   6)
* c++filt:                               c++filt.             (line   6)
* changing object addresses:             objcopy.             (line 400)
* changing section address:              objcopy.             (line 410)
* changing section LMA:                  objcopy.             (line 419)
* changing section VMA:                  objcopy.             (line 432)
* changing start address:                objcopy.             (line 395)
* collections of files:                  ar.                  (line   6)
* Compact Type Format:                   objdump.             (line 670)
* Compact Type Format <1>:               readelf.             (line 327)
* compatibility, ar:                     ar.                  (line  60)
* contents of archive:                   ar cmdline.          (line  97)
* crash:                                 Bug Criteria.        (line   9)
* creating archives:                     ar cmdline.          (line 144)
* creating thin archive:                 ar cmdline.          (line 219)
* CTF:                                   objdump.             (line 670)
* CTF <1>:                               readelf.             (line 327)
* cxxfilt:                               c++filt.             (line  16)
* dates in archive:                      ar cmdline.          (line 183)
* debug symbols:                         objdump.             (line 684)
* debugging symbols:                     nm.                  (line 153)
* deleting from archive:                 ar cmdline.          (line  26)
* demangling C++ symbols:                c++filt.             (line   6)
* demangling in nm:                      nm.                  (line 161)
* demangling in objdump:                 objdump.             (line 102)
* demangling in objdump <1>:             addr2line.           (line  86)
* deterministic archives:                ar cmdline.          (line 150)
* deterministic archives <1>:            ar cmdline.          (line 233)
* deterministic archives <2>:            objcopy.             (line 355)
* deterministic archives <3>:            objcopy.             (line 365)
* deterministic archives <4>:            ranlib.              (line  32)
* deterministic archives <5>:            ranlib.              (line  44)
* deterministic archives <6>:            strip.               (line 155)
* deterministic archives <7>:            strip.               (line 165)
* disassembling object code:             objdump.             (line 143)
* disassembly architecture:              objdump.             (line 250)
* disassembly endianness:                objdump.             (line 185)
* disassembly, with source:              objdump.             (line 486)
* disassembly, with source <1>:          objdump.             (line 490)
* discarding symbols:                    strip.               (line   6)
* DLL:                                   dlltool.             (line   6)
* dlltool:                               dlltool.             (line   6)
* dynamic relocation entries, in object file: objdump.        (line 474)
* dynamic symbol table entries, printing: objdump.            (line 783)
* dynamic symbols:                       nm.                  (line 191)
* ELF dynamic section information:       readelf.             (line 132)
* ELF dynamic symbol table information:  readelf.             (line 104)
* ELF file header information:           readelf.             (line  67)
* ELF file information:                  readelf.             (line   6)
* ELF notes:                             readelf.             (line 114)
* ELF object file format:                objdump.             (line 684)
* ELF program header information:        readelf.             (line  73)
* ELF reloc information:                 readelf.             (line 118)
* ELF section group information:         readelf.             (line  84)
* ELF section information:               readelf.             (line  79)
* ELF section information <1>:           readelf.             (line  89)
* ELF segment information:               readelf.             (line  73)
* ELF symbol table information:          readelf.             (line  94)
* ELF version sections information:      readelf.             (line 136)
* elfedit:                               elfedit.             (line   6)
* endianness:                            objdump.             (line 185)
* error on valid input:                  Bug Criteria.        (line  12)
* external symbols:                      nm.                  (line 203)
* external symbols <1>:                  nm.                  (line 267)
* external symbols <2>:                  nm.                  (line 281)
* extract from archive:                  ar cmdline.          (line 114)
* fatal signal:                          Bug Criteria.        (line   9)
* file name:                             nm.                  (line 147)
* header information, all:               objdump.             (line 806)
* input .def file:                       dlltool.             (line 120)
* input file name:                       nm.                  (line 147)
* Instruction width:                     objdump.             (line 514)
* libraries:                             ar.                  (line  25)
* listings strings:                      strings.             (line   6)
* machine instructions:                  objdump.             (line 143)
* moving in archive:                     ar cmdline.          (line  34)
* MRI compatibility, ar:                 ar scripts.          (line   8)
* name duplication in archive:           ar cmdline.          (line 108)
* name length:                           ar.                  (line  18)
* nm:                                    nm.                  (line   6)
* nm compatibility:                      nm.                  (line 157)
* nm compatibility <1>:                  nm.                  (line 197)
* nm format:                             nm.                  (line 157)
* nm format <1>:                         nm.                  (line 197)
* not writing archive index:             ar cmdline.          (line 212)
* objdump:                               objdump.             (line   6)
* objdump inlines:                       nm.                  (line 219)
* object code format:                    nm.                  (line 333)
* object code format <1>:                objdump.             (line  88)
* object code format <2>:                size.                (line 103)
* object code format <3>:                strings.             (line  94)
* object code format <4>:                addr2line.           (line  81)
* object file header:                    objdump.             (line 191)
* object file information:               objdump.             (line   6)
* object file offsets:                   objdump.             (line 196)
* object file sections:                  objdump.             (line 481)
* object formats available:              objdump.             (line 235)
* offsets of files:                      ar cmdline.          (line 188)
* operations on archive:                 ar cmdline.          (line  22)
* plugins:                               ar cmdline.          (line 267)
* plugins <1>:                           nm.                  (line 284)
* printing from archive:                 ar cmdline.          (line  46)
* printing strings:                      strings.             (line   6)
* quick append to archive:               ar cmdline.          (line  54)
* radix for section sizes:               size.                (line  85)
* ranlib:                                ranlib.              (line   6)
* ranlib <1>:                            ar cmdline.          (line  91)
* readelf:                               readelf.             (line   6)
* relative placement in archive:         ar cmdline.          (line 132)
* relocation entries, in object file:    objdump.             (line 468)
* removing symbols:                      strip.               (line   6)
* repeated names in archive:             ar cmdline.          (line 108)
* replacement in archive:                ar cmdline.          (line  73)
* reporting bugs:                        Reporting Bugs.      (line   6)
* scripts, ar:                           ar scripts.          (line   8)
* section addresses in objdump:          objdump.             (line  80)
* section headers:                       objdump.             (line 212)
* section information:                   objdump.             (line 240)
* section sizes:                         size.                (line   6)
* sections, full contents:               objdump.             (line 481)
* separate debug files:                  debuginfod.          (line   6)
* size:                                  size.                (line   6)
* size display format:                   size.                (line  28)
* size number format:                    size.                (line  85)
* sorting symbols:                       nm.                  (line 234)
* source code context:                   objdump.             (line 205)
* source disassembly:                    objdump.             (line 486)
* source disassembly <1>:                objdump.             (line 490)
* source file name:                      nm.                  (line 147)
* source filenames for object files:     objdump.             (line 244)
* stab:                                  objdump.             (line 684)
* start-address:                         objdump.             (line 693)
* stop-address:                          objdump.             (line 697)
* strings:                               strings.             (line   6)
* strings, printing:                     strings.             (line   6)
* strip:                                 strip.               (line   6)
* Strip absolute paths:                  objdump.             (line 500)
* symbol index:                          ar.                  (line  28)
* symbol index <1>:                      ranlib.              (line   6)
* symbol index, listing:                 nm.                  (line 256)
* symbol line numbers:                   nm.                  (line 211)
* symbol table entries, printing:        objdump.             (line 702)
* symbols:                               nm.                  (line   6)
* symbols, discarding:                   strip.               (line   6)
* thin archives:                         ar.                  (line  40)
* undefined symbols:                     nm.                  (line 267)
* undefined symbols <1>:                 nm.                  (line 281)
* Unix compatibility, ar:                ar cmdline.          (line   8)
* unwind information:                    readelf.             (line 123)
* Update ELF header:                     elfedit.             (line   6)
* updating an archive:                   ar cmdline.          (line 224)
* version:                               Top.                 (line   6)
* VMA in objdump:                        objdump.             (line  80)
* wide output, printing:                 objdump.             (line 812)
* writing archive index:                 ar cmdline.          (line 206)



Tag Table:
Node: Top1834
Node: ar3551
Node: ar cmdline6704
Node: ar scripts19330
Node: nm25016
Node: objcopy37640
Node: objdump77841
Node: ranlib110414
Node: size112013
Node: strings115982
Node: strip120354
Node: c++filt129879
Ref: c++filt-Footnote-1135741
Node: addr2line135847
Node: windmc141526
Node: windres145185
Node: dlltool151544
Node: def file format164541
Node: readelf167071
Node: elfedit179645
Node: Common Options182601
Node: Selecting the Target System183635
Node: Target Selection184563
Node: Architecture Selection186544
Node: debuginfod187372
Node: Reporting Bugs188131
Node: Bug Criteria188893
Node: Bug Reporting189446
Node: GNU Free Documentation License196316
Node: Binutils Index221476

End Tag Table


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coding: utf-8
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