This is binutils.info, produced by makeinfo version 4.0 from
binutils.texi.

START-INFO-DIR-ENTRY
* Binutils: (binutils).         The GNU binary utilities.
* ar: (binutils)ar.               Create, modify, and extract from archives
* 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
* c++filt: (binutils)c++filt.	  Filter to demangle encoded C++ symbols
* cxxfilt: (binutils)c++filt.     MS-DOS name for c++filt
* addr2line: (binutils)addr2line. Convert addresses to file and line
* nlmconv: (binutils)nlmconv.     Converts object code into an NLM
* windres: (binutils)windres.	  Manipulate Windows resources
* dlltool: (binutils)dlltool.	  Create files needed to build and use DLLs
END-INFO-DIR-ENTRY

   Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000 Free
Software Foundation, Inc.

   Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

   Permission is granted to copy and distribute modified versions of
this manual under the conditions for verbatim copying, provided also
that the entire resulting derived work is distributed under the terms
of a permission notice identical to this one.

   Permission is granted to copy and distribute translations of this
manual into another language, under the above conditions for modified
versions.

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

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

   This brief manual contains preliminary documentation for the GNU
binary utilities (collectively version 2.10):

* 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
* readelf::			Display the contents of ELF format files.
* 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
* nlmconv::                     Converts object code into an NLM
* windres::			Manipulate Windows resources
* dlltool::			Create files needed to build and use DLLs
* Selecting The Target System:: How these utilities determine the target.
* Reporting Bugs::              Reporting Bugs
* Index::                       Index

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

ar
**

     ar [-]P[MOD [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' 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

Controlling `ar' on the command line
====================================

     ar [-]P[MOD [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, the archive's symbol
     table index is not updated, even if it already existed; you can
     use `ar s' or `ranlib' explicitly to update the symbol table index.

     However, too many different systems assume quick append rebuilds
     the index, so GNU ar implements `q' as a synonym for `r'.

`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.

`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; if you also want to see
     the modes (permissions), timestamp, owner, group, and size, you can
     request that by also specifying the `v' modifier.

     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.

   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.

`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.

`P'
     Use the full path name when matching names in the archive.  GNU
     `ar' can not create an archive with a full path name (such archives
     are not POSIX complaint), but other archive creators can.  This
     option will cause GNU `ar' to match file names using a complete
     path name, which can be convenient when extracting a single file
     from an archive created by another tool.

`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.

`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'.

`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'.

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

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

nm
**

     nm [ -a | --debug-syms ]  [ -g | --extern-only ]
        [ -B ]  [ -C | --demangle ] [ -D | --dynamic ]
        [ -s | --print-armap ]  [ -A | -o | --print-file-name ]
        [ -n | -v | --numeric-sort ]  [ -p | --no-sort ]
        [ -r | --reverse-sort ]  [ --size-sort ] [ -u | --undefined-only ]
        [ -t RADIX | --radix=RADIX ] [ -P | --portability ]
        [ --target=BFDNAME ] [ -f FORMAT | --format=FORMAT ]
        [ --defined-only ] [-l | --line-numbers ]
        [ --no-demangle ] [ -V | --version ]  [ --help ]  [ 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 local; if uppercase, the symbol is global (external).

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

    `B'
          The symbol is in the uninitialized data section (known as
          BSS).

    `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'
          The symbol is in the initialized data section.

    `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'
          The symbol is an indirect reference to another symbol.  This
          is a GNU extension to the a.out object file format which is
          rarely used.

    `N'
          The symbol is a debugging symbol.

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

    `S'
          The symbol is in an uninitialized data section for small
          objects.

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

    `U'
          The symbol is undefined.

    `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.

    `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
          weak symbol becomes zero with no error.

    `-'
          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; for more information, see
          *Note Stabs: (stabs.info)Top.

    `?'
          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'
     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.  *Note c++filt::, for more
     information on demangling.

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

`-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.

`-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.

`-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'.

`-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.

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

`--size-sort'
     Sort symbols by size.  The size is computed as the difference
     between the value of the symbol and the value of the symbol with
     the next higher value.  The size of the symbol is printed, rather
     than the value.

`-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.

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

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

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

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

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

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

objcopy
*******

     objcopy [ -F BFDNAME | --target=BFDNAME ]
             [ -I BFDNAME | --input-target=BFDNAME ]
             [ -O BFDNAME | --output-target=BFDNAME ]
             [ -S | --strip-all ]  [ -g | --strip-debug ]
             [ -K SYMBOLNAME | --keep-symbol=SYMBOLNAME ]
             [ -N SYMBOLNAME | --strip-symbol=SYMBOLNAME ]
             [ -L SYMBOLNAME | --localize-symbol=SYMBOLNAME ]
             [ -W SYMBOLNAME | --weaken-symbol=SYMBOLNAME ]
             [ -x | --discard-all ]  [ -X | --discard-locals ]
             [ -b BYTE | --byte=BYTE ]
             [ -i INTERLEAVE | --interleave=INTERLEAVE ]
             [ -j SECTIONNAME | --only-section=SECTIONNAME ]
             [ -R SECTIONNAME | --remove-section=SECTIONNAME ]
             [ -p | --preserve-dates ] [ --debugging ]
             [ --gap-fill=VAL ] [ --pad-to=ADDRESS ]
             [ --set-start=VAL ] [ --adjust-start=INCR ]
             [ --change-addresses=INCR ]
             [ --change-section-address SECTION{=,+,-}VAL ]
             [ --change-section-lma SECTION{=,+,-}VAL ]
             [ --change-section-vma SECTION{=,+,-}VAL ]
             [ --change-warnings ] [ --no-change-warnings ]
             [ --set-section-flags SECTION=FLAGS ]
             [ --add-section SECTIONNAME=FILENAME ]
             [ --change-leading-char ] [ --remove-leading-char ]
             [ --redefine-sym OLD=NEW ] [ --weaken ]
             [ -v | --verbose ] [ -V | --version ]  [ --help ]
             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.

   `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.

`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.

`-j SECTIONNAME'
`--only-section=SECTIONNAME'
     Copy only the named section 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.

`-R SECTIONNAME'
`--remove-section=SECTIONNAME'
     Remove any section named SECTIONNAME from the output file.  This
     option may be given more than once.  Note that using this option
     inappropriately may make the output file unusable.

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

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

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

`-K SYMBOLNAME'
`--keep-symbol=SYMBOLNAME'
     Copy only symbol SYMBOLNAME from the source file.  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.

`-L SYMBOLNAME'
`--localize-symbol=SYMBOLNAME'
     Make symbol SYMBOLNAME local to the file, so that it is not
     visible externally.  This option may be given more than once.

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

`-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'
     Keep only every BYTEth byte of the input file (header data is not
     affected).  BYTE can be in the range from 0 to INTERLEAVE-1, where
     INTERLEAVE is given by the `-i' or `--interleave' option, or the
     default of 4.  This option is useful for creating files to program
     ROM.  It is typically used with an `srec' output target.

`-i INTERLEAVE'
`--interleave=INTERLEAVE'
     Only copy one out of every INTERLEAVE bytes.  Select which byte to
     copy with the -B or `--byte' option.  The default is 4.  `objcopy'
     ignores this option if you do not specify either `-b' or `--byte'.

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

`--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 SECTION{=,+,-}VAL'
`--adjust-section-vma SECTION{=,+,-}VAL'
     Set or change both the VMA address and the LMA address of the named
     SECTION.  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 SECTION
     does not exist in the input file, a warning will be issued, unless
     `--no-change-warnings' is used.

`--change-section-lma SECTION{=,+,-}VAL'
     Set or change the LMA address of the named SECTION.  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 SECTION does not exist in the
     input file, a warning will be issued, unless
     `--no-change-warnings' is used.

`--change-section-vma SECTION{=,+,-}VAL'
     Set or change the VMA address of the named SECTION.  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 SECTION does not exist 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 named section does not
     exist, 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 named section does not exist.

`--set-section-flags SECTION=FLAGS'
     Set the flags for the named section.  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.

`--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.

`--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.

`--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.

`--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.

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

`-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'.

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

objdump
*******

     objdump [ -a | --archive-headers ]
             [ -b BFDNAME | --target=BFDNAME ]
             [ -C | --demangle ]
             [ -d | --disassemble ]
             [ -D | --disassemble-all ]
             [ -z | --disassemble-zeroes ]
             [ -EB | -EL | --endian={big | little } ]
             [ -f | --file-headers ]
             [ --file-start-context ]
             [ -g | --debugging ]
             [ -h | --section-headers | --headers ]
             [ -i | --info ]
             [ -j SECTION | --section=SECTION ]
             [ -l | --line-numbers ]
             [ -S | --source ]
             [ -m MACHINE | --architecture=MACHINE ]
             [ -M OPTIONS | --disassembler-options=OPTIONS]
             [ -p | --private-headers ]
             [ -r | --reloc ]
             [ -R | --dynamic-reloc ]
             [ -s | --full-contents ]
             [ -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 ]
             [ -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,-f,-g,-G,-h,-H,-p,-r,-R,-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'
     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.  *Note c++filt::, for more
     information on demangling.

`-G'

`--debugging'
     Display debugging information.  This attempts to parse debugging
     information stored in the file and print it out using a C like
     syntax.  Only certain types of debugging information have been
     implemented.

`-d'
`--disassemble'
     Display the assembler mnemonics for the machine instructions from
     OBJFILE.  This option only disassembles those sections which are
     expected to contain instructions.

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

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

`--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.

`-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-header'
     Display summary information from the overall header of each of the
     OBJFILE files.

`--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-header'
`--header'
     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.

`--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.

`-M OPTIONS'
`--disassembler-options=OPTIONS'
     Pass target specific information to the disassembler.  Only
     supported on some targets.

     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-name-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.  (Eiuther with the normal register name sor 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.

`-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.

`-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.

`-s'
`--full-contents'
     Display the full contents of any sections requested.

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

`--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.

`-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.  For more information on stabs symbols, see
     *Note Stabs: (stabs.info)Top.

`--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.

`-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.

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

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

`-w'
`--wide'
     Format some lines for output devices that have more than 80
     columns.

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

ranlib
******

     ranlib [-vV] 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::.

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