File: binutils.info, Node: Top, Next: ar, Up: (dir)
Introduction
************
This brief manual contains documentation for the GNU binary utilities
(GNU Binutils) version 2.30:
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
* nlmconv:: Converts object code into an NLM
* 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 the ELF header of ELF files
* Common Options:: Command-line options for all utilities
* Selecting the Target System:: How these utilities determine the target
* 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] [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] [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; 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.
Files cannot be extracted from a thin archive.
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.
'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.
'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 spelt '-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.
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]
[-U METHOD] [--unicode=METHOD]
[-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 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'
'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.
'p'
The symbols 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 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 1024 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).
'-U [D|I|L|E|X|H]'
'--unicode=[DEFAULT|INVALID|LOCALE|ESCAPE|HEX|HIGHLIGHT]'
Controls the display of UTF-8 encoded mulibyte characters in
strings. The default ('--unicode=default') is to give them no
special treatment. The '--unicode=locale' option displays the
sequence in the current locale, which may or may not support them.
The options '--unicode=hex' and '--unicode=invalid' display them as
hex byte sequences enclosed by either angle brackets or curly
braces.
The '--unicode=escape' option displays them as escape sequences
(\UXXXX) and the '--unicode=highlight' option displays them as
escape sequences highlighted in red (if supported by the output
device). The colouring is intended to draw attention to the
presence of unicode sequences where they might not be expected.
'-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]
[-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]
[--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]
[--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]
[--globalize-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]
[-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'.
'--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'
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.
'--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.
'-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. In particular the
'share' flag is only meaningful for COFF format files and not for
ELF format files.
'--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 accepts the same set of flags as the
'--sect-section-flags' option.
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.
'--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 is 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. 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'.
'-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]
[-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]
[-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]
[-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]
[--no-recurse-limit|--recurse-limit]
[--special-syms]
[--prefix=PREFIX]
[--prefix-strip=LEVEL]
[--insn-width=WIDTH]
[-U METHOD] [--unicode=METHOD]
[-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 1024 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 and
IEEE debugging format information stored in the file and print it
out using a C like syntax. If neither of these formats are 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'
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.
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.
'--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 souble 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 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 four
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'.
'--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.
'-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 the link to a
separate dwarf object file (dwo), if one is specified by the
DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
'.debug_info' section.
'K'
'=follow-links'
Display the contents of any selected debug sections that are
found in a linked, separate debug info file. This can result
in multiple versions of the same debug section being displayed
if both the main file and the separate debug info file contain
sections with the same name.
In addition, when displaying DWARF attributes, if a form is
found that references the separate debug info file, then the
referenced contents will also be displayed.
'l'
'=rawline'
Displays the contents of the '.debug_line' section in a raw
format.
'L'
'=decodedline'
Displays the interpreted contents of the '.debug_line'
section.
'm'
'=macro'
Displays the contents of the '.debug_macro' and/or
'.debug_macinfo' sections.
'o'
'=loc'
Displays the contents of the '.debug_loc' and/or
'.debug_loclists' sections.
'p'
'=pubnames'
Displays the contents of the '.debug_pubnames' and/or
'.debug_gnu_pubnames' sections.
'r'
'=aranges'
Displays the contents of the '.debug_aranges' section.
'R'
'=Ranges'
Displays the contents of the '.debug_ranges' and/or
'.debug_rnglists' sections.
's'
'=str'
Displays the contents of the '.debug_str', '.debug_line_str'
and/or '.debug_str_offsets' sections.
't'
'=pubtype'
Displays the contents of the '.debug_pubtypes' and/or
'.debug_gnu_pubtypes' sections.
'T'
'=trace_aranges'
Displays the contents of the '.trace_aranges' section.
'u'
'=trace_abbrev'
Displays the contents of the '.trace_abbrev' section.
'U'
'=trace_info'
Displays the contents of the '.trace_info' section.
Note: displaying the contents of '.debug_static_funcs',
'.debug_static_vars' and 'debug_weaknames' sections is not
currently supported.
'--dwarf-depth=N'
Limit the dump of the '.debug_info' section to N children. This is
only useful with '--debug-dump=info'. The default is to print all
DIEs; the special value 0 for N will also have this effect.
With a non-zero value for N, DIEs at or deeper than N levels will
not be printed. The range for N is zero-based.
'--dwarf-start=N'
Print only DIEs beginning with the DIE numbered N. This is only
useful with '--debug-dump=info'.
If specified, this option will suppress printing of any header
information and all DIEs before the DIE numbered N. Only siblings
and children of the specified DIE will be printed.
This can be used in conjunction with '--dwarf-depth'.
'--dwarf-check'
Enable additional checks for consistency of Dwarf information.
'-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.
'-U [D|I|L|E|X|H]'
'--unicode=[DEFAULT|INVALID|LOCALE|ESCAPE|HEX|HIGHLIGHT]'
Controls the display of UTF-8 encoded mulibyte characters in
strings. The default ('--unicode=default') is to give them no
special treatment. The '--unicode=locale' option displays the
sequence in the current locale, which may or may not support them.
The options '--unicode=hex' and '--unicode=invalid' display them as
hex byte sequences enclosed by either angle brackets or curly
braces.
The '--unicode=escape' option displays them as escape sequences
(\UXXXX) and the '--unicode=highlight' option displays them as
escape sequences highlighted in red (if supported by the output
device). The colouring is intended to draw attention to the
presence of unicode sequences where they might not be expected.
'-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|--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 object or archive files OBJFILE in its argument
list. By default, one line of output is generated for each object file
or each module in an archive.
OBJFILE... are the object files to be examined. If none are
specified, the file 'a.out' will be used.
The command line options have the following meanings:
'-A'
'-B'
'--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.
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
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 format these are included in the bss size.
'-t'
'--totals'
Show totals of all objects listed (Berkeley format listing 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]
[-U METHOD] [--unicode=METHOD]
[-] [--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).
'-U [D|I|L|E|X|H]'
'--unicode=[DEFAULT|INVALID|LOCALE|ESCAPE|HEX|HIGHLIGHT]'
Controls the display of UTF-8 encoded mulibyte characters in
strings. The default ('--unicode=default') is to give them no
special treatment, and instead rely upon the setting of the
'--encoding' option. The other values for this option
automatically enable '--encoding=S'.
The '--unicode=invalid' option treats them as non-graphic
characters and hence not part of a valid string. All the remaining
options treat them as valid string characters.
The '--unicode=locale' option displays them in the current locale,
which may or may not support UTF-8 encoding. The '--unicode=hex'
option displays them as hex byte sequences enclosed between <>
characters. The '--unicode=escape' option displays them as escape
sequences (\UXXXX) and the '--unicode=highlight' option displays
them as escape sequences highlighted in red (if supported by the
output device). The colouring is intended to draw attention to the
presence of unicode sequences where they might not be expected.
'-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]
[--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'.
'--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.
'-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 is 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 1024 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: nlmconv, 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 1024 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: nlmconv, Next: windmc, Prev: addr2line, Up: Top
11 nlmconv
**********
'nlmconv' converts a relocatable object file into a NetWare Loadable
Module.
_Warning:_ 'nlmconv' is not always built as part of the binary
utilities, since it is only useful for NLM targets.
nlmconv [-I BFDNAME|--input-target=BFDNAME]
[-O BFDNAME|--output-target=BFDNAME]
[-T HEADERFILE|--header-file=HEADERFILE]
[-d|--debug] [-l LINKER|--linker=LINKER]
[-h|--help] [-V|--version]
INFILE OUTFILE
'nlmconv' converts the relocatable 'i386' object file INFILE into the
NetWare Loadable Module OUTFILE, optionally reading HEADERFILE for NLM
header information. For instructions on writing the NLM command file
language used in header files, see the 'linkers' section, 'NLMLINK' in
particular, of the 'NLM Development and Tools Overview', which is part
of the NLM Software Developer's Kit ("NLM SDK"), available from Novell,
Inc. 'nlmconv' uses the GNU Binary File Descriptor library to read
INFILE; see *note BFD: (ld.info)BFD, for more information.
'nlmconv' can perform a link step. In other words, you can list more
than one object file for input if you list them in the definitions file
(rather than simply specifying one input file on the command line). In
this case, 'nlmconv' calls the linker for you.
'-I BFDNAME'
'--input-target=BFDNAME'
Object format of the input file. 'nlmconv' can usually determine
the format of a given file (so no default is necessary). *Note
Target Selection::, for more information.
'-O BFDNAME'
'--output-target=BFDNAME'
Object format of the output file. 'nlmconv' infers the output
format based on the input format, e.g. for a 'i386' input file the
output format is 'nlm32-i386'. *Note Target Selection::, for more
information.
'-T HEADERFILE'
'--header-file=HEADERFILE'
Reads HEADERFILE for NLM header information. For instructions on
writing the NLM command file language used in header files, see see
the 'linkers' section, of the 'NLM Development and Tools Overview',
which is part of the NLM Software Developer's Kit, available from
Novell, Inc.
'-d'
'--debug'
Displays (on standard error) the linker command line used by
'nlmconv'.
'-l LINKER'
'--linker=LINKER'
Use LINKER for any linking. LINKER can be an absolute or a
relative pathname.
'-h'
'--help'
Prints a usage summary.
'-V'
'--version'
Prints the version number for 'nlmconv'.
File: binutils.info, Node: windmc, Next: windres, Prev: nlmconv, Up: Top
12 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
13 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
14 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
14.1 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
15 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]
[-I|--histogram]
[-v|--version]
[-W|--wide]
[-H|--help]
[-U METHOD|--unicode=METHOD]
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.
'-U [D|I|L|E|X|H]'
'--unicode=[default|invalid|locale|escape|hex|highlight]'
Controls the display of non-ASCII characters in identifier names.
The default ('--unicode=locale' or '--unicode=default') is to treat
them as multibyte characters and display them in the current
locale. All other versions of this option treat the bytes as UTF-8
encoded values and attempt to interpret them. If they cannot be
interpreted or if the '--unicode=invalid' option is used then they
are displayed as a sequence of hex bytes, encloses in curly
parethesis characters.
Using the '--unicode=escape' option will display the characters as
as unicode escape sequences (\UXXXX). Using the '--unicode=hex'
will display the characters as hex byte sequences enclosed between
angle brackets.
Using the '--unicode=highlight' will display the characters as
unicode escape sequences but it will also highlighted them in red,
assuming that colouring is supported by the output device. The
colouring is intended to draw attention to the presence of unicode
sequences when they might not be expected.
'-e'
'--headers'
Display all the headers in the file. Equivalent to '-h -l -S'.
'-n'
'--notes'
Displays the contents of the NOTE segments and/or sections, if any.
'-r'
'--relocs'
Displays the contents of the file's relocation section, if it has
one.
'-u'
'--unwind'
Displays the contents of the file's unwind section, if it has one.
Only the unwind sections for IA64 ELF files, as well as ARM unwind
tables ('.ARM.exidx' / '.ARM.extab') are currently supported.
'-d'
'--dynamic'
Displays the contents of the file's dynamic section, if it has one.
'-V'
'--version-info'
Displays the contents of the version sections in the file, it they
exist.
'-A'
'--arch-specific'
Displays architecture-specific information in the file, if there is
any.
'-D'
'--use-dynamic'
When displaying symbols, this option makes 'readelf' use the symbol
hash tables in the file's dynamic section, rather than the symbol
table sections.
When displaying relocations, this option makes 'readelf' display
the dynamic relocations rather than the static relocations.
'-x <number or name>'
'--hex-dump=<number or name>'
Displays the contents of the indicated section as a hexadecimal
bytes. A number identifies a particular section by index in the
section table; any other string identifies all sections with that
name in the object file.
'-R <number or name>'
'--relocated-dump=<number or name>'
Displays the contents of the indicated section as a hexadecimal
bytes. A number identifies a particular section by index in the
section table; any other string identifies all sections with that
name in the object file. The contents of the section will be
relocated before they are displayed.
'-p <number or name>'
'--string-dump=<number or name>'
Displays the contents of the indicated section as printable
strings. A number identifies a particular section by index in the
section table; any other string identifies all sections with that
name in the object file.
'-z'
'--decompress'
Requests that the section(s) being dumped by 'x', 'R' or 'p'
options are decompressed before being displayed. If the section(s)
are not compressed then they are displayed as is.
'-c'
'--archive-index'
Displays the file symbol index information contained in the header
part of binary archives. Performs the same function as the 't'
command to 'ar', but without using the BFD library. *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 the link to a
separate dwarf object file (dwo), if one is specified by the
DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
'.debug_info' section.
'K'
'=follow-links'
Display the contents of any selected debug sections that are
found in a linked, separate debug info file. This can result
in multiple versions of the same debug section being displayed
if both the main file and the separate debug info file contain
sections with the same name.
In addition, when displaying DWARF attributes, if a form is
found that references the separate debug info file, then the
referenced contents will also be displayed.
'l'
'=rawline'
Displays the contents of the '.debug_line' section in a raw
format.
'L'
'=decodedline'
Displays the interpreted contents of the '.debug_line'
section.
'm'
'=macro'
Displays the contents of the '.debug_macro' and/or
'.debug_macinfo' sections.
'o'
'=loc'
Displays the contents of the '.debug_loc' and/or
'.debug_loclists' sections.
'p'
'=pubnames'
Displays the contents of the '.debug_pubnames' and/or
'.debug_gnu_pubnames' sections.
'r'
'=aranges'
Displays the contents of the '.debug_aranges' section.
'R'
'=Ranges'
Displays the contents of the '.debug_ranges' and/or
'.debug_rnglists' sections.
's'
'=str'
Displays the contents of the '.debug_str', '.debug_line_str'
and/or '.debug_str_offsets' sections.
't'
'=pubtype'
Displays the contents of the '.debug_pubtypes' and/or
'.debug_gnu_pubtypes' sections.
'T'
'=trace_aranges'
Displays the contents of the '.trace_aranges' section.
'u'
'=trace_abbrev'
Displays the contents of the '.trace_abbrev' section.
'U'
'=trace_info'
Displays the contents of the '.trace_info' section.
Note: displaying the contents of '.debug_static_funcs',
'.debug_static_vars' and 'debug_weaknames' sections is not
currently supported.
'--dwarf-depth=N'
Limit the dump of the '.debug_info' section to N children. This is
only useful with '--debug-dump=info'. The default is to print all
DIEs; the special value 0 for N will also have this effect.
With a non-zero value for N, DIEs at or deeper than N levels will
not be printed. The range for N is zero-based.
'--dwarf-start=N'
Print only DIEs beginning with the DIE numbered N. This is only
useful with '--debug-dump=info'.
If specified, this option will suppress printing of any header
information and all DIEs before the DIE numbered N. Only siblings
and children of the specified DIE will be printed.
This can be used in conjunction with '--dwarf-depth'.
'-I'
'--histogram'
Display a histogram of bucket list lengths when displaying the
contents of the symbol tables.
'-v'
'--version'
Display the version number of readelf.
'-W'
'--wide'
Don't break output lines to fit into 80 columns. By default
'readelf' breaks section header and segment listing lines for
64-bit ELF files, so that they fit into 80 columns. This option
causes 'readelf' to print each section header resp. each segment
one a single line, which is far more readable on terminals wider
than 80 columns.
'-H'
'--help'
Display the command line options understood by 'readelf'.
File: binutils.info, Node: elfedit, Next: Common Options, Prev: readelf, Up: Top
16 elfedit
**********
elfedit [--input-mach=MACHINE]
[--input-type=TYPE]
[--input-osabi=OSABI]
--output-mach=MACHINE
--output-type=TYPE
--output-osabi=OSABI
[-v|--version]
[-h|--help]
ELFFILE...
'elfedit' updates the ELF header of ELF files which have the matching
ELF machine and file types. The options control how and which fields in
the ELF header 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' and
'--output-osabi' 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'.
'-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
17 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: Reporting Bugs, Prev: Common Options, Up: Top
18 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
18.1 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
18.2 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: Reporting Bugs, Next: GNU Free Documentation License, Prev: Selecting the Target System, 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
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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,
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Examples of suitable formats for Transparent copies include plain
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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
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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
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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
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5. COMBINING DOCUMENTS
You may combine the Document with other documents released under
this License, under the terms defined in section 4 above for
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of the Invariant Sections of all of the original documents,
unmodified, and list them all as Invariant Sections of your
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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
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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
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* Menu:
* -enable-deterministic-archives: ar cmdline. (line 143)
* -enable-deterministic-archives <1>: ar cmdline. (line 216)
* -enable-deterministic-archives <2>: objcopy. (line 343)
* -enable-deterministic-archives <3>: objcopy. (line 353)
* -enable-deterministic-archives <4>: ranlib. (line 32)
* -enable-deterministic-archives <5>: ranlib. (line 44)
* -enable-deterministic-archives <6>: strip. (line 149)
* -enable-deterministic-archives <7>: strip. (line 159)
* .stab: objdump. (line 633)
* Add prefix to absolute paths: objdump. (line 468)
* addr2line: addr2line. (line 6)
* address to file name and line number: addr2line. (line 6)
* all header information, object file: objdump. (line 771)
* ar: ar. (line 6)
* ar compatibility: ar. (line 60)
* architecture: objdump. (line 233)
* architectures available: objdump. (line 218)
* archive contents: ranlib. (line 6)
* Archive file symbol index information: readelf. (line 199)
* archive headers: objdump. (line 71)
* 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 388)
* changing section address: objcopy. (line 398)
* changing section LMA: objcopy. (line 407)
* changing section VMA: objcopy. (line 420)
* changing start address: objcopy. (line 383)
* collections of files: ar. (line 6)
* compatibility, ar: ar. (line 60)
* contents of archive: ar cmdline. (line 97)
* crash: Bug Criteria. (line 9)
* creating archives: ar cmdline. (line 137)
* creating thin archive: ar cmdline. (line 202)
* cxxfilt: c++filt. (line 16)
* dates in archive: ar cmdline. (line 176)
* debug symbols: objdump. (line 633)
* debugging symbols: nm. (line 150)
* deleting from archive: ar cmdline. (line 26)
* demangling C++ symbols: c++filt. (line 6)
* demangling in nm: nm. (line 158)
* demangling in objdump: objdump. (line 99)
* demangling in objdump <1>: addr2line. (line 86)
* deterministic archives: ar cmdline. (line 143)
* deterministic archives <1>: ar cmdline. (line 216)
* deterministic archives <2>: objcopy. (line 343)
* deterministic archives <3>: objcopy. (line 353)
* deterministic archives <4>: ranlib. (line 32)
* deterministic archives <5>: ranlib. (line 44)
* deterministic archives <6>: strip. (line 149)
* deterministic archives <7>: strip. (line 159)
* disassembling object code: objdump. (line 139)
* disassembly architecture: objdump. (line 233)
* disassembly endianness: objdump. (line 168)
* disassembly, with source: objdump. (line 464)
* discarding symbols: strip. (line 6)
* DLL: dlltool. (line 6)
* dlltool: dlltool. (line 6)
* dynamic relocation entries, in object file: objdump. (line 452)
* dynamic symbol table entries, printing: objdump. (line 732)
* dynamic symbols: nm. (line 188)
* ELF dynamic section information: readelf. (line 148)
* ELF dynamic symbol table information: readelf. (line 101)
* ELF file header information: readelf. (line 64)
* ELF file information: readelf. (line 6)
* ELF notes: readelf. (line 133)
* ELF object file format: objdump. (line 633)
* ELF program header information: readelf. (line 70)
* ELF reloc information: readelf. (line 137)
* ELF section group information: readelf. (line 81)
* ELF section information: readelf. (line 76)
* ELF section information <1>: readelf. (line 86)
* ELF segment information: readelf. (line 70)
* ELF symbol table information: readelf. (line 91)
* ELF version sections information: readelf. (line 152)
* elfedit: elfedit. (line 6)
* endianness: objdump. (line 168)
* error on valid input: Bug Criteria. (line 12)
* external symbols: nm. (line 200)
* external symbols <1>: nm. (line 264)
* external symbols <2>: nm. (line 294)
* extract from archive: ar cmdline. (line 112)
* fatal signal: Bug Criteria. (line 9)
* file name: nm. (line 144)
* header information, all: objdump. (line 771)
* input .def file: dlltool. (line 120)
* input file name: nm. (line 144)
* Instruction width: objdump. (line 485)
* libraries: ar. (line 25)
* listings strings: strings. (line 6)
* machine instructions: objdump. (line 139)
* moving in archive: ar cmdline. (line 34)
* MRI compatibility, ar: ar scripts. (line 8)
* name duplication in archive: ar cmdline. (line 106)
* name length: ar. (line 18)
* nm: nm. (line 6)
* nm compatibility: nm. (line 154)
* nm compatibility <1>: nm. (line 194)
* nm format: nm. (line 154)
* nm format <1>: nm. (line 194)
* not writing archive index: ar cmdline. (line 195)
* objdump: objdump. (line 6)
* objdump inlines: nm. (line 216)
* object code format: nm. (line 346)
* object code format <1>: objdump. (line 85)
* object code format <2>: size. (line 84)
* object code format <3>: strings. (line 116)
* object code format <4>: addr2line. (line 81)
* object file header: objdump. (line 174)
* object file information: objdump. (line 6)
* object file offsets: objdump. (line 179)
* object file sections: objdump. (line 459)
* object formats available: objdump. (line 218)
* operations on archive: ar cmdline. (line 22)
* plugins: ar cmdline. (line 250)
* plugins <1>: nm. (line 297)
* 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 66)
* ranlib: ranlib. (line 6)
* ranlib <1>: ar cmdline. (line 91)
* readelf: readelf. (line 6)
* relative placement in archive: ar cmdline. (line 125)
* relocation entries, in object file: objdump. (line 446)
* removing symbols: strip. (line 6)
* repeated names in archive: ar cmdline. (line 106)
* 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 77)
* section headers: objdump. (line 195)
* section information: objdump. (line 223)
* section sizes: size. (line 6)
* sections, full contents: objdump. (line 459)
* size: size. (line 6)
* size display format: size. (line 27)
* size number format: size. (line 66)
* sorting symbols: nm. (line 231)
* source code context: objdump. (line 188)
* source disassembly: objdump. (line 464)
* source file name: nm. (line 144)
* source filenames for object files: objdump. (line 227)
* stab: objdump. (line 633)
* start-address: objdump. (line 642)
* stop-address: objdump. (line 646)
* strings: strings. (line 6)
* strings, printing: strings. (line 6)
* strip: strip. (line 6)
* Strip absolute paths: objdump. (line 471)
* symbol index: ar. (line 28)
* symbol index <1>: ranlib. (line 6)
* symbol index, listing: nm. (line 253)
* symbol line numbers: nm. (line 208)
* symbol table entries, printing: objdump. (line 651)
* symbols: nm. (line 6)
* symbols, discarding: strip. (line 6)
* thin archives: ar. (line 40)
* undefined symbols: nm. (line 264)
* undefined symbols <1>: nm. (line 294)
* Unix compatibility, ar: ar cmdline. (line 8)
* unwind information: readelf. (line 142)
* Update ELF header: elfedit. (line 6)
* updating an archive: ar cmdline. (line 207)
* version: Top. (line 6)
* VMA in objdump: objdump. (line 77)
* wide output, printing: objdump. (line 777)
* writing archive index: ar cmdline. (line 189)
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