4820 lines
173 KiB
Plaintext
4820 lines
173 KiB
Plaintext
\input texinfo @c -*- Texinfo -*-
|
|
@setfilename binutils.info
|
|
@settitle @sc{gnu} Binary Utilities
|
|
@finalout
|
|
@synindex ky cp
|
|
|
|
@c man begin INCLUDE
|
|
@include bfdver.texi
|
|
@c man end
|
|
|
|
@copying
|
|
@c man begin COPYRIGHT
|
|
Copyright @copyright{} 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
|
|
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
|
|
2010, 2011, 2012
|
|
Free Software Foundation, Inc.
|
|
|
|
Permission is granted to copy, distribute and/or modify this document
|
|
under the terms of the GNU Free Documentation License, Version 1.3
|
|
or any later version published by the Free Software Foundation;
|
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
|
Back-Cover Texts. A copy of the license is included in the
|
|
section entitled ``GNU Free Documentation License''.
|
|
|
|
@c man end
|
|
@end copying
|
|
|
|
@dircategory Software development
|
|
@direntry
|
|
* Binutils: (binutils). The GNU binary utilities.
|
|
@end direntry
|
|
|
|
@dircategory Individual utilities
|
|
@direntry
|
|
* addr2line: (binutils)addr2line. Convert addresses to file and line.
|
|
* ar: (binutils)ar. Create, modify, and extract from archives.
|
|
* c++filt: (binutils)c++filt. Filter to demangle encoded C++ symbols.
|
|
* cxxfilt: (binutils)c++filt. MS-DOS name for c++filt.
|
|
* dlltool: (binutils)dlltool. Create files needed to build and use DLLs.
|
|
* nlmconv: (binutils)nlmconv. Converts object code into an NLM.
|
|
* nm: (binutils)nm. List symbols from object files.
|
|
* objcopy: (binutils)objcopy. Copy and translate object files.
|
|
* objdump: (binutils)objdump. Display information from object files.
|
|
* ranlib: (binutils)ranlib. Generate index to archive contents.
|
|
* readelf: (binutils)readelf. Display the contents of ELF format files.
|
|
* size: (binutils)size. List section sizes and total size.
|
|
* strings: (binutils)strings. List printable strings from files.
|
|
* strip: (binutils)strip. Discard symbols.
|
|
* elfedit: (binutils)elfedit. Update the ELF header of ELF files.
|
|
* windmc: (binutils)windmc. Generator for Windows message resources.
|
|
* windres: (binutils)windres. Manipulate Windows resources.
|
|
@end direntry
|
|
|
|
@titlepage
|
|
@title The @sc{gnu} Binary Utilities
|
|
@ifset VERSION_PACKAGE
|
|
@subtitle @value{VERSION_PACKAGE}
|
|
@end ifset
|
|
@subtitle Version @value{VERSION}
|
|
@sp 1
|
|
@subtitle @value{UPDATED}
|
|
@author Roland H. Pesch
|
|
@author Jeffrey M. Osier
|
|
@author Cygnus Support
|
|
@page
|
|
|
|
@tex
|
|
{\parskip=0pt \hfill Cygnus Support\par \hfill
|
|
Texinfo \texinfoversion\par }
|
|
@end tex
|
|
|
|
@vskip 0pt plus 1filll
|
|
@insertcopying
|
|
@end titlepage
|
|
@contents
|
|
|
|
@node Top
|
|
@top Introduction
|
|
|
|
@cindex version
|
|
This brief manual contains documentation for the @sc{gnu} binary
|
|
utilities
|
|
@ifset VERSION_PACKAGE
|
|
@value{VERSION_PACKAGE}
|
|
@end ifset
|
|
version @value{VERSION}:
|
|
|
|
@iftex
|
|
@table @code
|
|
@item ar
|
|
Create, modify, and extract from archives
|
|
|
|
@item nm
|
|
List symbols from object files
|
|
|
|
@item objcopy
|
|
Copy and translate object files
|
|
|
|
@item objdump
|
|
Display information from object files
|
|
|
|
@item ranlib
|
|
Generate index to archive contents
|
|
|
|
@item readelf
|
|
Display the contents of ELF format files.
|
|
|
|
@item size
|
|
List file section sizes and total size
|
|
|
|
@item strings
|
|
List printable strings from files
|
|
|
|
@item strip
|
|
Discard symbols
|
|
|
|
@item elfedit
|
|
Update the ELF header of ELF files.
|
|
|
|
@item c++filt
|
|
Demangle encoded C++ symbols (on MS-DOS, this program is named
|
|
@code{cxxfilt})
|
|
|
|
@item addr2line
|
|
Convert addresses into file names and line numbers
|
|
|
|
@item nlmconv
|
|
Convert object code into a Netware Loadable Module
|
|
|
|
@item windres
|
|
Manipulate Windows resources
|
|
|
|
@item windmc
|
|
Generator for Windows message resources
|
|
|
|
@item dlltool
|
|
Create the files needed to build and use Dynamic Link Libraries
|
|
@end table
|
|
@end iftex
|
|
|
|
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
|
|
* readelf:: Display the contents of ELF format files
|
|
* size:: List section sizes and total size
|
|
* strings:: List printable strings from files
|
|
* strip:: Discard symbols
|
|
* elfedit:: Update the ELF header of ELF files
|
|
* c++filt:: Filter to demangle encoded C++ symbols
|
|
* cxxfilt: c++filt. MS-DOS name for c++filt
|
|
* addr2line:: Convert addresses to file and line
|
|
* nlmconv:: Converts object code into an NLM
|
|
* windres:: Manipulate Windows resources
|
|
* windmc:: Generator for Windows message resources
|
|
* dlltool:: Create files needed to build and use DLLs
|
|
* 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
|
|
@end menu
|
|
|
|
@node ar
|
|
@chapter ar
|
|
|
|
@kindex ar
|
|
@cindex archives
|
|
@cindex collections of files
|
|
|
|
@c man title ar create, modify, and extract from archives
|
|
|
|
@smallexample
|
|
ar [@option{--plugin} @var{name}] [-]@var{p}[@var{mod} [@var{relpos}] [@var{count}]] [@option{--target} @var{bfdname}] @var{archive} [@var{member}@dots{}]
|
|
ar -M [ <mri-script ]
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION ar
|
|
|
|
The @sc{gnu} @command{ar} program creates, modifies, and extracts from
|
|
archives. An @dfn{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 @dfn{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.
|
|
|
|
@cindex name length
|
|
@sc{gnu} @command{ar} can maintain archives whose members have names of any
|
|
length; however, depending on how @command{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).
|
|
|
|
@cindex libraries
|
|
@command{ar} is considered a binary utility because archives of this sort
|
|
are most often used as @dfn{libraries} holding commonly needed
|
|
subroutines.
|
|
|
|
@cindex symbol index
|
|
@command{ar} creates an index to the symbols defined in relocatable
|
|
object modules in the archive when you specify the modifier @samp{s}.
|
|
Once created, this index is updated in the archive whenever @command{ar}
|
|
makes a change to its contents (save for the @samp{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 @samp{nm -s} or @samp{nm --print-armap} to list this index
|
|
table. If an archive lacks the table, another form of @command{ar} called
|
|
@command{ranlib} can be used to add just the table.
|
|
|
|
@cindex thin archives
|
|
@sc{gnu} @command{ar} can optionally create a @emph{thin} archive,
|
|
which contains a symbol index and references to the original copies
|
|
of the member files of the archives. Such an archive is useful
|
|
for building libraries for use within a local build, where the
|
|
relocatable objects are expected to remain available, and copying the
|
|
contents of each object would only waste time and space. Thin archives
|
|
are also @emph{flattened}, so that adding one or more archives to a
|
|
thin archive will add the elements of the nested archive individually.
|
|
The paths to the elements of the archive are stored relative to the
|
|
archive itself.
|
|
|
|
@cindex compatibility, @command{ar}
|
|
@cindex @command{ar} compatibility
|
|
@sc{gnu} @command{ar} is designed to be compatible with two different
|
|
facilities. You can control its activity using command-line options,
|
|
like the different varieties of @command{ar} on Unix systems; or, if you
|
|
specify the single command-line option @option{-M}, you can control it
|
|
with a script supplied via standard input, like the MRI ``librarian''
|
|
program.
|
|
|
|
@c man end
|
|
|
|
@menu
|
|
* ar cmdline:: Controlling @command{ar} on the command line
|
|
* ar scripts:: Controlling @command{ar} with a script
|
|
@end menu
|
|
|
|
@page
|
|
@node ar cmdline
|
|
@section Controlling @command{ar} on the Command Line
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS ar
|
|
ar [@option{--plugin} @var{name}] [@option{-X32_64}] [@option{-}]@var{p}[@var{mod} [@var{relpos}] [@var{count}]] [@option{--target} @var{bfdname}] @var{archive} [@var{member}@dots{}]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@cindex Unix compatibility, @command{ar}
|
|
When you use @command{ar} in the Unix style, @command{ar} insists on at least two
|
|
arguments to execute: one keyletter specifying the @emph{operation}
|
|
(optionally accompanied by other keyletters specifying
|
|
@emph{modifiers}), and the archive name to act on.
|
|
|
|
Most operations can also accept further @var{member} arguments,
|
|
specifying particular files to operate on.
|
|
|
|
@c man begin OPTIONS ar
|
|
|
|
@sc{gnu} @command{ar} allows you to mix the operation code @var{p} and modifier
|
|
flags @var{mod} in any order, within the first command-line argument.
|
|
|
|
If you wish, you may begin the first command-line argument with a
|
|
dash.
|
|
|
|
@cindex operations on archive
|
|
The @var{p} keyletter specifies what operation to execute; it may be
|
|
any of the following, but you must specify only one of them:
|
|
|
|
@table @samp
|
|
@item d
|
|
@cindex deleting from archive
|
|
@emph{Delete} modules from the archive. Specify the names of modules to
|
|
be deleted as @var{member}@dots{}; the archive is untouched if you
|
|
specify no files to delete.
|
|
|
|
If you specify the @samp{v} modifier, @command{ar} lists each module
|
|
as it is deleted.
|
|
|
|
@item m
|
|
@cindex moving in archive
|
|
Use this operation to @emph{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 @code{m}, any members you name in the
|
|
@var{member} arguments are moved to the @emph{end} of the archive;
|
|
you can use the @samp{a}, @samp{b}, or @samp{i} modifiers to move them to a
|
|
specified place instead.
|
|
|
|
@item p
|
|
@cindex printing from archive
|
|
@emph{Print} the specified members of the archive, to the standard
|
|
output file. If the @samp{v} modifier is specified, show the member
|
|
name before copying its contents to standard output.
|
|
|
|
If you specify no @var{member} arguments, all the files in the archive are
|
|
printed.
|
|
|
|
@item q
|
|
@cindex quick append to archive
|
|
@emph{Quick append}; Historically, add the files @var{member}@dots{} to the end of
|
|
@var{archive}, without checking for replacement.
|
|
|
|
The modifiers @samp{a}, @samp{b}, and @samp{i} do @emph{not} affect this
|
|
operation; new members are always placed at the end of the archive.
|
|
|
|
The modifier @samp{v} makes @command{ar} list each file as it is appended.
|
|
|
|
Since the point of this operation is speed, the archive's symbol table
|
|
index is not updated, even if it already existed; you can use @samp{ar s} or
|
|
@command{ranlib} explicitly to update the symbol table index.
|
|
|
|
However, too many different systems assume quick append rebuilds the
|
|
index, so @sc{gnu} @command{ar} implements @samp{q} as a synonym for @samp{r}.
|
|
|
|
@item r
|
|
@cindex replacement in archive
|
|
Insert the files @var{member}@dots{} into @var{archive} (with
|
|
@emph{replacement}). This operation differs from @samp{q} in that any
|
|
previously existing members are deleted if their names match those being
|
|
added.
|
|
|
|
If one of the files named in @var{member}@dots{} does not exist, @command{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 @samp{a}, @samp{b}, or @samp{i} to request
|
|
placement relative to some existing member.
|
|
|
|
The modifier @samp{v} used with this operation elicits a line of
|
|
output for each file inserted, along with one of the letters @samp{a} or
|
|
@samp{r} to indicate whether the file was appended (no old member
|
|
deleted) or replaced.
|
|
|
|
@item s
|
|
@cindex ranlib
|
|
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.
|
|
|
|
@item t
|
|
@cindex contents of archive
|
|
Display a @emph{table} listing the contents of @var{archive}, or those
|
|
of the files listed in @var{member}@dots{} 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 @samp{v} modifier.
|
|
|
|
If you do not specify a @var{member}, all files in the archive
|
|
are listed.
|
|
|
|
@cindex repeated names in archive
|
|
@cindex name duplication in archive
|
|
If there is more than one file with the same name (say, @samp{fie}) in
|
|
an archive (say @samp{b.a}), @samp{ar t b.a fie} lists only the
|
|
first instance; to see them all, you must ask for a complete
|
|
listing---in our example, @samp{ar t b.a}.
|
|
@c WRS only; per Gumby, this is implementation-dependent, and in a more
|
|
@c recent case in fact works the other way.
|
|
|
|
@item x
|
|
@cindex extract from archive
|
|
@emph{Extract} members (named @var{member}) from the archive. You can
|
|
use the @samp{v} modifier with this operation, to request that
|
|
@command{ar} list each name as it extracts it.
|
|
|
|
If you do not specify a @var{member}, all files in the archive
|
|
are extracted.
|
|
|
|
Files cannot be extracted from a thin archive.
|
|
|
|
@item --help
|
|
Displays the list of command line options supported by @command{ar}
|
|
and then exits.
|
|
|
|
@item --version
|
|
Displays the version information of @command{ar} and then exits.
|
|
|
|
@end table
|
|
|
|
A number of modifiers (@var{mod}) may immediately follow the @var{p}
|
|
keyletter, to specify variations on an operation's behavior:
|
|
|
|
@table @samp
|
|
@item a
|
|
@cindex relative placement in archive
|
|
Add new files @emph{after} an existing member of the
|
|
archive. If you use the modifier @samp{a}, the name of an existing archive
|
|
member must be present as the @var{relpos} argument, before the
|
|
@var{archive} specification.
|
|
|
|
@item b
|
|
Add new files @emph{before} an existing member of the
|
|
archive. If you use the modifier @samp{b}, the name of an existing archive
|
|
member must be present as the @var{relpos} argument, before the
|
|
@var{archive} specification. (same as @samp{i}).
|
|
|
|
@item c
|
|
@cindex creating archives
|
|
@emph{Create} the archive. The specified @var{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.
|
|
|
|
@item D
|
|
@cindex deterministic archives
|
|
@kindex --enable-deterministic-archives
|
|
Operate in @emph{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 @command{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 @file{binutils} was configured with
|
|
@option{--enable-deterministic-archives}, then this mode is on by default.
|
|
It can be disabled with the @samp{U} modifier, below.
|
|
|
|
@item f
|
|
Truncate names in the archive. @sc{gnu} @command{ar} will normally permit file
|
|
names of any length. This will cause it to create archives which are
|
|
not compatible with the native @command{ar} program on some systems. If
|
|
this is a concern, the @samp{f} modifier may be used to truncate file
|
|
names when putting them in the archive.
|
|
|
|
@item i
|
|
Insert new files @emph{before} an existing member of the
|
|
archive. If you use the modifier @samp{i}, the name of an existing archive
|
|
member must be present as the @var{relpos} argument, before the
|
|
@var{archive} specification. (same as @samp{b}).
|
|
|
|
@item l
|
|
This modifier is accepted but not used.
|
|
@c whaffor ar l modifier??? presumably compat; with
|
|
@c what???---doc@@cygnus.com, 25jan91
|
|
|
|
@item N
|
|
Uses the @var{count} parameter. This is used if there are multiple
|
|
entries in the archive with the same name. Extract or delete instance
|
|
@var{count} of the given name from the archive.
|
|
|
|
@item o
|
|
@cindex dates in archive
|
|
Preserve the @emph{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.
|
|
|
|
@item P
|
|
Use the full path name when matching names in the archive. @sc{gnu}
|
|
@command{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 @sc{gnu} @command{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.
|
|
|
|
@item s
|
|
@cindex writing archive index
|
|
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 @samp{ar s} on an
|
|
archive is equivalent to running @samp{ranlib} on it.
|
|
|
|
@item S
|
|
@cindex not writing archive index
|
|
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
|
|
@samp{S} modifier on the last execution of @samp{ar}, or you must run
|
|
@samp{ranlib} on the archive.
|
|
|
|
@item T
|
|
@cindex creating thin archive
|
|
Make the specified @var{archive} a @emph{thin} archive. If it already
|
|
exists and is a regular archive, the existing members must be present
|
|
in the same directory as @var{archive}.
|
|
|
|
@item u
|
|
@cindex updating an archive
|
|
Normally, @samp{ar r}@dots{} inserts all files
|
|
listed into the archive. If you would like to insert @emph{only} those
|
|
of the files you list that are newer than existing members of the same
|
|
names, use this modifier. The @samp{u} modifier is allowed only for the
|
|
operation @samp{r} (replace). In particular, the combination @samp{qu} is
|
|
not allowed, since checking the timestamps would lose any speed
|
|
advantage from the operation @samp{q}.
|
|
|
|
@item U
|
|
@cindex deterministic archives
|
|
@kindex --enable-deterministic-archives
|
|
Do @emph{not} operate in @emph{deterministic} mode. This is the inverse
|
|
of the @samp{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 @file{binutils} was configured with
|
|
@option{--enable-deterministic-archives}.
|
|
|
|
@item v
|
|
This modifier requests the @emph{verbose} version of an operation. Many
|
|
operations display additional information, such as filenames processed,
|
|
when the modifier @samp{v} is appended.
|
|
|
|
@item V
|
|
This modifier shows the version number of @command{ar}.
|
|
@end table
|
|
|
|
@command{ar} ignores an initial option spelt @samp{-X32_64}, for
|
|
compatibility with AIX. The behaviour produced by this option is the
|
|
default for @sc{gnu} @command{ar}. @command{ar} does not support any of the other
|
|
@samp{-X} options; in particular, it does not support @option{-X32}
|
|
which is the default for AIX @command{ar}.
|
|
|
|
The optional command line switch @option{--plugin} @var{name} causes
|
|
@command{ar} to load the plugin called @var{name} which adds support
|
|
for more file formats. This option is only available if the toolchain
|
|
has been built with plugin support enabled.
|
|
|
|
The optional command line switch @option{--target} @var{bfdname}
|
|
specifies that the archive members are in an object code format
|
|
different from your system's default format. See
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO ar
|
|
nm(1), ranlib(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node ar scripts
|
|
@section Controlling @command{ar} with a Script
|
|
|
|
@smallexample
|
|
ar -M [ <@var{script} ]
|
|
@end smallexample
|
|
|
|
@cindex MRI compatibility, @command{ar}
|
|
@cindex scripts, @command{ar}
|
|
If you use the single command-line option @samp{-M} with @command{ar}, you
|
|
can control its operation with a rudimentary command language. This
|
|
form of @command{ar} operates interactively if standard input is coming
|
|
directly from a terminal. During interactive use, @command{ar} prompts for
|
|
input (the prompt is @samp{AR >}), and continues executing even after
|
|
errors. If you redirect standard input to a script file, no prompts are
|
|
issued, and @command{ar} abandons execution (with a nonzero exit code)
|
|
on any error.
|
|
|
|
The @command{ar} command language is @emph{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 @sc{gnu} @command{ar} for developers who already have scripts
|
|
written for the MRI ``librarian'' program.
|
|
|
|
The syntax for the @command{ar} command language is straightforward:
|
|
@itemize @bullet
|
|
@item
|
|
commands are recognized in upper or lower case; for example, @code{LIST}
|
|
is the same as @code{list}. In the following descriptions, commands are
|
|
shown in upper case for clarity.
|
|
|
|
@item
|
|
a single command may appear on each line; it is the first word on the
|
|
line.
|
|
|
|
@item
|
|
empty lines are allowed, and have no effect.
|
|
|
|
@item
|
|
comments are allowed; text after either of the characters @samp{*}
|
|
or @samp{;} is ignored.
|
|
|
|
@item
|
|
Whenever you use a list of names as part of the argument to an @command{ar}
|
|
command, you can separate the individual names with either commas or
|
|
blanks. Commas are shown in the explanations below, for clarity.
|
|
|
|
@item
|
|
@samp{+} is used as a line continuation character; if @samp{+} appears
|
|
at the end of a line, the text on the following line is considered part
|
|
of the current command.
|
|
@end itemize
|
|
|
|
Here are the commands you can use in @command{ar} scripts, or when using
|
|
@command{ar} interactively. Three of them have special significance:
|
|
|
|
@code{OPEN} or @code{CREATE} specify a @dfn{current archive}, which is
|
|
a temporary file required for most of the other commands.
|
|
|
|
@code{SAVE} commits the changes so far specified by the script. Prior
|
|
to @code{SAVE}, commands affect only the temporary copy of the current
|
|
archive.
|
|
|
|
@table @code
|
|
@item ADDLIB @var{archive}
|
|
@itemx ADDLIB @var{archive} (@var{module}, @var{module}, @dots{} @var{module})
|
|
Add all the contents of @var{archive} (or, if specified, each named
|
|
@var{module} from @var{archive}) to the current archive.
|
|
|
|
Requires prior use of @code{OPEN} or @code{CREATE}.
|
|
|
|
@item ADDMOD @var{member}, @var{member}, @dots{} @var{member}
|
|
@c FIXME! w/Replacement?? If so, like "ar r @var{archive} @var{names}"
|
|
@c else like "ar q..."
|
|
Add each named @var{member} as a module in the current archive.
|
|
|
|
Requires prior use of @code{OPEN} or @code{CREATE}.
|
|
|
|
@item CLEAR
|
|
Discard the contents of the current archive, canceling the effect of
|
|
any operations since the last @code{SAVE}. May be executed (with no
|
|
effect) even if no current archive is specified.
|
|
|
|
@item CREATE @var{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 @var{archive} until you use @code{SAVE}.
|
|
You can overwrite existing archives; similarly, the contents of any
|
|
existing file named @var{archive} will not be destroyed until @code{SAVE}.
|
|
|
|
@item DELETE @var{module}, @var{module}, @dots{} @var{module}
|
|
Delete each listed @var{module} from the current archive; equivalent to
|
|
@samp{ar -d @var{archive} @var{module} @dots{} @var{module}}.
|
|
|
|
Requires prior use of @code{OPEN} or @code{CREATE}.
|
|
|
|
@item DIRECTORY @var{archive} (@var{module}, @dots{} @var{module})
|
|
@itemx DIRECTORY @var{archive} (@var{module}, @dots{} @var{module}) @var{outputfile}
|
|
List each named @var{module} present in @var{archive}. The separate
|
|
command @code{VERBOSE} specifies the form of the output: when verbose
|
|
output is off, output is like that of @samp{ar -t @var{archive}
|
|
@var{module}@dots{}}. When verbose output is on, the listing is like
|
|
@samp{ar -tv @var{archive} @var{module}@dots{}}.
|
|
|
|
Output normally goes to the standard output stream; however, if you
|
|
specify @var{outputfile} as a final argument, @command{ar} directs the
|
|
output to that file.
|
|
|
|
@item END
|
|
Exit from @command{ar}, with a @code{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 @code{SAVE} command, those
|
|
changes are lost.
|
|
|
|
@item EXTRACT @var{module}, @var{module}, @dots{} @var{module}
|
|
Extract each named @var{module} from the current archive, writing them
|
|
into the current directory as separate files. Equivalent to @samp{ar -x
|
|
@var{archive} @var{module}@dots{}}.
|
|
|
|
Requires prior use of @code{OPEN} or @code{CREATE}.
|
|
|
|
@ignore
|
|
@c FIXME Tokens but no commands???
|
|
@item FULLDIR
|
|
|
|
@item HELP
|
|
@end ignore
|
|
|
|
@item LIST
|
|
Display full contents of the current archive, in ``verbose'' style
|
|
regardless of the state of @code{VERBOSE}. The effect is like @samp{ar
|
|
tv @var{archive}}. (This single command is a @sc{gnu} @command{ar}
|
|
enhancement, rather than present for MRI compatibility.)
|
|
|
|
Requires prior use of @code{OPEN} or @code{CREATE}.
|
|
|
|
@item OPEN @var{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 @var{archive} until you next use @code{SAVE}.
|
|
|
|
@item REPLACE @var{module}, @var{module}, @dots{} @var{module}
|
|
In the current archive, replace each existing @var{module} (named in
|
|
the @code{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 @code{OPEN} or @code{CREATE}.
|
|
|
|
@item VERBOSE
|
|
Toggle an internal flag governing the output from @code{DIRECTORY}.
|
|
When the flag is on, @code{DIRECTORY} output matches output from
|
|
@samp{ar -tv }@dots{}.
|
|
|
|
@item SAVE
|
|
Commit your changes to the current archive, and actually save it as a
|
|
file with the name specified in the last @code{CREATE} or @code{OPEN}
|
|
command.
|
|
|
|
Requires prior use of @code{OPEN} or @code{CREATE}.
|
|
|
|
@end table
|
|
|
|
@iftex
|
|
@node ld
|
|
@chapter ld
|
|
@cindex linker
|
|
@kindex ld
|
|
The @sc{gnu} linker @command{ld} is now described in a separate manual.
|
|
@xref{Top,, Overview,, Using LD: the @sc{gnu} linker}.
|
|
@end iftex
|
|
|
|
@node nm
|
|
@chapter nm
|
|
@cindex symbols
|
|
@kindex nm
|
|
|
|
@c man title nm list symbols from object files
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS nm
|
|
nm [@option{-a}|@option{--debug-syms}]
|
|
[@option{-g}|@option{--extern-only}][@option{--plugin} @var{name}]
|
|
[@option{-B}] [@option{-C}|@option{--demangle}[=@var{style}]] [@option{-D}|@option{--dynamic}]
|
|
[@option{-S}|@option{--print-size}] [@option{-s}|@option{--print-armap}]
|
|
[@option{-A}|@option{-o}|@option{--print-file-name}][@option{--special-syms}]
|
|
[@option{-n}|@option{-v}|@option{--numeric-sort}] [@option{-p}|@option{--no-sort}]
|
|
[@option{-r}|@option{--reverse-sort}] [@option{--size-sort}] [@option{-u}|@option{--undefined-only}]
|
|
[@option{-t} @var{radix}|@option{--radix=}@var{radix}] [@option{-P}|@option{--portability}]
|
|
[@option{--target=}@var{bfdname}] [@option{-f}@var{format}|@option{--format=}@var{format}]
|
|
[@option{--defined-only}] [@option{-l}|@option{--line-numbers}] [@option{--no-demangle}]
|
|
[@option{-V}|@option{--version}] [@option{-X 32_64}] [@option{--help}] [@var{objfile}@dots{}]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION nm
|
|
@sc{gnu} @command{nm} lists the symbols from object files @var{objfile}@dots{}.
|
|
If no object files are listed as arguments, @command{nm} assumes the file
|
|
@file{a.out}.
|
|
|
|
For each symbol, @command{nm} shows:
|
|
|
|
@itemize @bullet
|
|
@item
|
|
The symbol value, in the radix selected by options (see below), or
|
|
hexadecimal by default.
|
|
|
|
@item
|
|
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 (@code{u}, @code{v} and @code{w}).
|
|
|
|
@c Some more detail on exactly what these symbol types are used for
|
|
@c would be nice.
|
|
@table @code
|
|
@item A
|
|
The symbol's value is absolute, and will not be changed by further
|
|
linking.
|
|
|
|
@item B
|
|
@itemx b
|
|
The symbol is in the uninitialized data section (known as BSS).
|
|
|
|
@item 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.
|
|
@ifclear man
|
|
For more details on common symbols, see the discussion of
|
|
--warn-common in @ref{Options,,Linker options,ld.info,The GNU linker}.
|
|
@end ifclear
|
|
|
|
@item D
|
|
@itemx d
|
|
The symbol is in the initialized data section.
|
|
|
|
@item G
|
|
@itemx 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.
|
|
|
|
@item 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.
|
|
|
|
@item N
|
|
The symbol is a debugging symbol.
|
|
|
|
@item p
|
|
The symbols is in a stack unwind section.
|
|
|
|
@item R
|
|
@itemx r
|
|
The symbol is in a read only data section.
|
|
|
|
@item S
|
|
@itemx s
|
|
The symbol is in an uninitialized data section for small objects.
|
|
|
|
@item T
|
|
@itemx t
|
|
The symbol is in the text (code) section.
|
|
|
|
@item U
|
|
The symbol is undefined.
|
|
|
|
@item 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.
|
|
|
|
@item V
|
|
@itemx 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.
|
|
|
|
@item W
|
|
@itemx 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.
|
|
|
|
@item -
|
|
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.
|
|
@ifclear man
|
|
For more information, see @ref{Top,Stabs,Stabs Overview,stabs.info, The
|
|
``stabs'' debug format}.
|
|
@end ifclear
|
|
|
|
@item ?
|
|
The symbol type is unknown, or object file format specific.
|
|
@end table
|
|
|
|
@item
|
|
The symbol name.
|
|
@end itemize
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS nm
|
|
The long and short forms of options, shown here as alternatives, are
|
|
equivalent.
|
|
|
|
@table @env
|
|
@item -A
|
|
@itemx -o
|
|
@itemx --print-file-name
|
|
@cindex input file name
|
|
@cindex file name
|
|
@cindex source 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.
|
|
|
|
@item -a
|
|
@itemx --debug-syms
|
|
@cindex debugging symbols
|
|
Display all symbols, even debugger-only symbols; normally these are not
|
|
listed.
|
|
|
|
@item -B
|
|
@cindex @command{nm} format
|
|
@cindex @command{nm} compatibility
|
|
The same as @option{--format=bsd} (for compatibility with the MIPS @command{nm}).
|
|
|
|
@item -C
|
|
@itemx --demangle[=@var{style}]
|
|
@cindex demangling in nm
|
|
Decode (@dfn{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. @xref{c++filt},
|
|
for more information on demangling.
|
|
|
|
@item --no-demangle
|
|
Do not demangle low-level symbol names. This is the default.
|
|
|
|
@item -D
|
|
@itemx --dynamic
|
|
@cindex dynamic symbols
|
|
Display the dynamic symbols rather than the normal symbols. This is
|
|
only meaningful for dynamic objects, such as certain types of shared
|
|
libraries.
|
|
|
|
@item -f @var{format}
|
|
@itemx --format=@var{format}
|
|
@cindex @command{nm} format
|
|
@cindex @command{nm} compatibility
|
|
Use the output format @var{format}, which can be @code{bsd},
|
|
@code{sysv}, or @code{posix}. The default is @code{bsd}.
|
|
Only the first character of @var{format} is significant; it can be
|
|
either upper or lower case.
|
|
|
|
@item -g
|
|
@itemx --extern-only
|
|
@cindex external symbols
|
|
Display only external symbols.
|
|
|
|
@item --plugin @var{name}
|
|
@cindex load plugin
|
|
Load the plugin called @var{name} to add support for extra target
|
|
types. This option is only available if the toolchain has been built
|
|
with plugin support enabled.
|
|
|
|
@item -l
|
|
@itemx --line-numbers
|
|
@cindex symbol 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.
|
|
|
|
@item -n
|
|
@itemx -v
|
|
@itemx --numeric-sort
|
|
Sort symbols numerically by their addresses, rather than alphabetically
|
|
by their names.
|
|
|
|
@item -p
|
|
@itemx --no-sort
|
|
@cindex sorting symbols
|
|
Do not bother to sort the symbols in any order; print them in the order
|
|
encountered.
|
|
|
|
@item -P
|
|
@itemx --portability
|
|
Use the POSIX.2 standard output format instead of the default format.
|
|
Equivalent to @samp{-f posix}.
|
|
|
|
@item -S
|
|
@itemx --print-size
|
|
Print both value and size of defined symbols for the @code{bsd} output style.
|
|
This option has no effect for object formats that do not record symbol
|
|
sizes, unless @samp{--size-sort} is also used in which case a
|
|
calculated size is displayed.
|
|
|
|
@item -s
|
|
@itemx --print-armap
|
|
@cindex symbol index, listing
|
|
When listing symbols from archive members, include the index: a mapping
|
|
(stored in the archive by @command{ar} or @command{ranlib}) of which modules
|
|
contain definitions for which names.
|
|
|
|
@item -r
|
|
@itemx --reverse-sort
|
|
Reverse the order of the sort (whether numeric or alphabetic); let the
|
|
last come first.
|
|
|
|
@item --size-sort
|
|
Sort symbols by size. The size is computed as the difference between
|
|
the value of the symbol and the value of the symbol with the next higher
|
|
value. If the @code{bsd} output format is used the size of the symbol
|
|
is printed, rather than the value, and @samp{-S} must be used in order
|
|
both size and value to be printed.
|
|
|
|
@item --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 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.
|
|
|
|
@item -t @var{radix}
|
|
@itemx --radix=@var{radix}
|
|
Use @var{radix} as the radix for printing the symbol values. It must be
|
|
@samp{d} for decimal, @samp{o} for octal, or @samp{x} for hexadecimal.
|
|
|
|
@item --target=@var{bfdname}
|
|
@cindex object code format
|
|
Specify an object code format other than your system's default format.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -u
|
|
@itemx --undefined-only
|
|
@cindex external symbols
|
|
@cindex undefined symbols
|
|
Display only undefined symbols (those external to each object file).
|
|
|
|
@item --defined-only
|
|
@cindex external symbols
|
|
@cindex undefined symbols
|
|
Display only defined symbols for each object file.
|
|
|
|
@item -V
|
|
@itemx --version
|
|
Show the version number of @command{nm} and exit.
|
|
|
|
@item -X
|
|
This option is ignored for compatibility with the AIX version of
|
|
@command{nm}. It takes one parameter which must be the string
|
|
@option{32_64}. The default mode of AIX @command{nm} corresponds
|
|
to @option{-X 32}, which is not supported by @sc{gnu} @command{nm}.
|
|
|
|
@item --help
|
|
Show a summary of the options to @command{nm} and exit.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO nm
|
|
ar(1), objdump(1), ranlib(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node objcopy
|
|
@chapter objcopy
|
|
|
|
@c man title objcopy copy and translate object files
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS objcopy
|
|
objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
|
|
[@option{-I} @var{bfdname}|@option{--input-target=}@var{bfdname}]
|
|
[@option{-O} @var{bfdname}|@option{--output-target=}@var{bfdname}]
|
|
[@option{-B} @var{bfdarch}|@option{--binary-architecture=}@var{bfdarch}]
|
|
[@option{-S}|@option{--strip-all}]
|
|
[@option{-g}|@option{--strip-debug}]
|
|
[@option{-K} @var{symbolname}|@option{--keep-symbol=}@var{symbolname}]
|
|
[@option{-N} @var{symbolname}|@option{--strip-symbol=}@var{symbolname}]
|
|
[@option{--strip-unneeded-symbol=}@var{symbolname}]
|
|
[@option{-G} @var{symbolname}|@option{--keep-global-symbol=}@var{symbolname}]
|
|
[@option{--localize-hidden}]
|
|
[@option{-L} @var{symbolname}|@option{--localize-symbol=}@var{symbolname}]
|
|
[@option{--globalize-symbol=}@var{symbolname}]
|
|
[@option{-W} @var{symbolname}|@option{--weaken-symbol=}@var{symbolname}]
|
|
[@option{-w}|@option{--wildcard}]
|
|
[@option{-x}|@option{--discard-all}]
|
|
[@option{-X}|@option{--discard-locals}]
|
|
[@option{-b} @var{byte}|@option{--byte=}@var{byte}]
|
|
[@option{-i} [@var{breadth}]|@option{--interleave}[=@var{breadth}]]
|
|
[@option{--interleave-width=}@var{width}]
|
|
[@option{-j} @var{sectionname}|@option{--only-section=}@var{sectionname}]
|
|
[@option{-R} @var{sectionname}|@option{--remove-section=}@var{sectionname}]
|
|
[@option{-p}|@option{--preserve-dates}]
|
|
[@option{-D}|@option{--enable-deterministic-archives}]
|
|
[@option{--debugging}]
|
|
[@option{--gap-fill=}@var{val}]
|
|
[@option{--pad-to=}@var{address}]
|
|
[@option{--set-start=}@var{val}]
|
|
[@option{--adjust-start=}@var{incr}]
|
|
[@option{--change-addresses=}@var{incr}]
|
|
[@option{--change-section-address} @var{section}@{=,+,-@}@var{val}]
|
|
[@option{--change-section-lma} @var{section}@{=,+,-@}@var{val}]
|
|
[@option{--change-section-vma} @var{section}@{=,+,-@}@var{val}]
|
|
[@option{--change-warnings}] [@option{--no-change-warnings}]
|
|
[@option{--set-section-flags} @var{section}=@var{flags}]
|
|
[@option{--add-section} @var{sectionname}=@var{filename}]
|
|
[@option{--rename-section} @var{oldname}=@var{newname}[,@var{flags}]]
|
|
[@option{--long-section-names} @{enable,disable,keep@}]
|
|
[@option{--change-leading-char}] [@option{--remove-leading-char}]
|
|
[@option{--reverse-bytes=}@var{num}]
|
|
[@option{--srec-len=}@var{ival}] [@option{--srec-forceS3}]
|
|
[@option{--redefine-sym} @var{old}=@var{new}]
|
|
[@option{--redefine-syms=}@var{filename}]
|
|
[@option{--weaken}]
|
|
[@option{--keep-symbols=}@var{filename}]
|
|
[@option{--strip-symbols=}@var{filename}]
|
|
[@option{--strip-unneeded-symbols=}@var{filename}]
|
|
[@option{--keep-global-symbols=}@var{filename}]
|
|
[@option{--localize-symbols=}@var{filename}]
|
|
[@option{--globalize-symbols=}@var{filename}]
|
|
[@option{--weaken-symbols=}@var{filename}]
|
|
[@option{--alt-machine-code=}@var{index}]
|
|
[@option{--prefix-symbols=}@var{string}]
|
|
[@option{--prefix-sections=}@var{string}]
|
|
[@option{--prefix-alloc-sections=}@var{string}]
|
|
[@option{--add-gnu-debuglink=}@var{path-to-file}]
|
|
[@option{--keep-file-symbols}]
|
|
[@option{--only-keep-debug}]
|
|
[@option{--strip-dwo}]
|
|
[@option{--extract-dwo}]
|
|
[@option{--extract-symbol}]
|
|
[@option{--writable-text}]
|
|
[@option{--readonly-text}]
|
|
[@option{--pure}]
|
|
[@option{--impure}]
|
|
[@option{--file-alignment=}@var{num}]
|
|
[@option{--heap=}@var{size}]
|
|
[@option{--image-base=}@var{address}]
|
|
[@option{--section-alignment=}@var{num}]
|
|
[@option{--stack=}@var{size}]
|
|
[@option{--subsystem=}@var{which}:@var{major}.@var{minor}]
|
|
[@option{--compress-debug-sections}]
|
|
[@option{--decompress-debug-sections}]
|
|
[@option{--dwarf-depth=@var{n}}]
|
|
[@option{--dwarf-start=@var{n}}]
|
|
[@option{-v}|@option{--verbose}]
|
|
[@option{-V}|@option{--version}]
|
|
[@option{--help}] [@option{--info}]
|
|
@var{infile} [@var{outfile}]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION objcopy
|
|
The @sc{gnu} @command{objcopy} utility copies the contents of an object
|
|
file to another. @command{objcopy} uses the @sc{gnu} @sc{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 @command{objcopy} is controlled by command-line options.
|
|
Note that @command{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.
|
|
|
|
@command{objcopy} creates temporary files to do its translations and
|
|
deletes them afterward. @command{objcopy} uses @sc{bfd} to do all its
|
|
translation work; it has access to all the formats described in @sc{bfd}
|
|
and thus is able to recognize most formats without being told
|
|
explicitly. @xref{BFD,,BFD,ld.info,Using LD}.
|
|
|
|
@command{objcopy} can be used to generate S-records by using an output
|
|
target of @samp{srec} (e.g., use @samp{-O srec}).
|
|
|
|
@command{objcopy} can be used to generate a raw binary file by using an
|
|
output target of @samp{binary} (e.g., use @option{-O binary}). When
|
|
@command{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 @option{-S} to remove sections containing debugging information. In
|
|
some cases @option{-R} will be useful to remove sections which contain
|
|
information that is not needed by the binary file.
|
|
|
|
Note---@command{objcopy} is not able to change the endianness of its input
|
|
files. If the input format has an endianness (some formats do not),
|
|
@command{objcopy} can only copy the inputs into file formats that have the
|
|
same endianness or which have no endianness (e.g., @samp{srec}).
|
|
(However, see the @option{--reverse-bytes} option.)
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS objcopy
|
|
|
|
@table @env
|
|
@item @var{infile}
|
|
@itemx @var{outfile}
|
|
The input and output files, respectively.
|
|
If you do not specify @var{outfile}, @command{objcopy} creates a
|
|
temporary file and destructively renames the result with
|
|
the name of @var{infile}.
|
|
|
|
@item -I @var{bfdname}
|
|
@itemx --input-target=@var{bfdname}
|
|
Consider the source file's object format to be @var{bfdname}, rather than
|
|
attempting to deduce it. @xref{Target Selection}, for more information.
|
|
|
|
@item -O @var{bfdname}
|
|
@itemx --output-target=@var{bfdname}
|
|
Write the output file using the object format @var{bfdname}.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -F @var{bfdname}
|
|
@itemx --target=@var{bfdname}
|
|
Use @var{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. @xref{Target Selection}, for more information.
|
|
|
|
@item -B @var{bfdarch}
|
|
@itemx --binary-architecture=@var{bfdarch}
|
|
Useful when transforming a architecture-less input file into an object file.
|
|
In this case the output architecture can be set to @var{bfdarch}. This
|
|
option will be ignored if the input file has a known @var{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_@var{objfile}_start, _binary_@var{objfile}_end and
|
|
_binary_@var{objfile}_size. e.g. you can transform a picture file into
|
|
an object file and then access it in your code using these symbols.
|
|
|
|
@item -j @var{sectionname}
|
|
@itemx --only-section=@var{sectionname}
|
|
Copy only the named section from the input file to the output file.
|
|
This option may be given more than once. Note that using this option
|
|
inappropriately may make the output file unusable.
|
|
|
|
@item -R @var{sectionname}
|
|
@itemx --remove-section=@var{sectionname}
|
|
Remove any section named @var{sectionname} from the output file. This
|
|
option may be given more than once. Note that using this option
|
|
inappropriately may make the output file unusable.
|
|
|
|
@item -S
|
|
@itemx --strip-all
|
|
Do not copy relocation and symbol information from the source file.
|
|
|
|
@item -g
|
|
@itemx --strip-debug
|
|
Do not copy debugging symbols or sections from the source file.
|
|
|
|
@item --strip-unneeded
|
|
Strip all symbols that are not needed for relocation processing.
|
|
|
|
@item -K @var{symbolname}
|
|
@itemx --keep-symbol=@var{symbolname}
|
|
When stripping symbols, keep symbol @var{symbolname} even if it would
|
|
normally be stripped. This option may be given more than once.
|
|
|
|
@item -N @var{symbolname}
|
|
@itemx --strip-symbol=@var{symbolname}
|
|
Do not copy symbol @var{symbolname} from the source file. This option
|
|
may be given more than once.
|
|
|
|
@item --strip-unneeded-symbol=@var{symbolname}
|
|
Do not copy symbol @var{symbolname} from the source file unless it is needed
|
|
by a relocation. This option may be given more than once.
|
|
|
|
@item -G @var{symbolname}
|
|
@itemx --keep-global-symbol=@var{symbolname}
|
|
Keep only symbol @var{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.
|
|
|
|
@item --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 @option{-L}.
|
|
|
|
@item -L @var{symbolname}
|
|
@itemx --localize-symbol=@var{symbolname}
|
|
Make symbol @var{symbolname} local to the file, so that it is not
|
|
visible externally. This option may be given more than once.
|
|
|
|
@item -W @var{symbolname}
|
|
@itemx --weaken-symbol=@var{symbolname}
|
|
Make symbol @var{symbolname} weak. This option may be given more than once.
|
|
|
|
@item --globalize-symbol=@var{symbolname}
|
|
Give symbol @var{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.
|
|
|
|
@item -w
|
|
@itemx --wildcard
|
|
Permit regular expressions in @var{symbolname}s 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:
|
|
|
|
@smallexample
|
|
-w -W !foo -W fo*
|
|
@end smallexample
|
|
|
|
would cause objcopy to weaken all symbols that start with ``fo''
|
|
except for the symbol ``foo''.
|
|
|
|
@item -x
|
|
@itemx --discard-all
|
|
Do not copy non-global symbols from the source file.
|
|
@c FIXME any reason to prefer "non-global" to "local" here?
|
|
|
|
@item -X
|
|
@itemx --discard-locals
|
|
Do not copy compiler-generated local symbols.
|
|
(These usually start with @samp{L} or @samp{.}.)
|
|
|
|
@item -b @var{byte}
|
|
@itemx --byte=@var{byte}
|
|
If interleaving has been enabled via the @option{--interleave} option
|
|
then start the range of bytes to keep at the @var{byte}th byte.
|
|
@var{byte} can be in the range from 0 to @var{breadth}-1, where
|
|
@var{breadth} is the value given by the @option{--interleave} option.
|
|
|
|
@item -i [@var{breadth}]
|
|
@itemx --interleave[=@var{breadth}]
|
|
Only copy a range out of every @var{breadth} bytes. (Header data is
|
|
not affected). Select which byte in the range begins the copy with
|
|
the @option{--byte} option. Select the width of the range with the
|
|
@option{--interleave-width} option.
|
|
|
|
This option is useful for creating files to program @sc{rom}. It is
|
|
typically used with an @code{srec} output target. Note that
|
|
@command{objcopy} will complain if you do not specify the
|
|
@option{--byte} option as well.
|
|
|
|
The default interleave breadth is 4, so with @option{--byte} set to 0,
|
|
@command{objcopy} would copy the first byte out of every four bytes
|
|
from the input to the output.
|
|
|
|
@item --interleave-width=@var{width}
|
|
When used with the @option{--interleave} option, copy @var{width}
|
|
bytes at a time. The start of the range of bytes to be copied is set
|
|
by the @option{--byte} option, and the extent of the range is set with
|
|
the @option{--interleave} option.
|
|
|
|
The default value for this option is 1. The value of @var{width} plus
|
|
the @var{byte} value set by the @option{--byte} option must not exceed
|
|
the interleave breadth set by the @option{--interleave} option.
|
|
|
|
This option can be used to create images for two 16-bit flashes interleaved
|
|
in a 32-bit bus by passing @option{-b 0 -i 4 --interleave-width=2}
|
|
and @option{-b 2 -i 4 --interleave-width=2} to two @command{objcopy}
|
|
commands. If the input was '12345678' then the outputs would be
|
|
'1256' and '3478' respectively.
|
|
|
|
@item -p
|
|
@itemx --preserve-dates
|
|
Set the access and modification dates of the output file to be the same
|
|
as those of the input file.
|
|
|
|
@item -D
|
|
@itemx --enable-deterministic-archives
|
|
Operate in @emph{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.
|
|
|
|
@item --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.
|
|
|
|
@item --gap-fill @var{val}
|
|
Fill gaps between sections with @var{val}. This operation applies to
|
|
the @emph{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 @var{val}.
|
|
|
|
@item --pad-to @var{address}
|
|
Pad the output file up to the load address @var{address}. This is
|
|
done by increasing the size of the last section. The extra space is
|
|
filled in with the value specified by @option{--gap-fill} (default zero).
|
|
|
|
@item --set-start @var{val}
|
|
Set the start address of the new file to @var{val}. Not all object file
|
|
formats support setting the start address.
|
|
|
|
@item --change-start @var{incr}
|
|
@itemx --adjust-start @var{incr}
|
|
@cindex changing start address
|
|
Change the start address by adding @var{incr}. Not all object file
|
|
formats support setting the start address.
|
|
|
|
@item --change-addresses @var{incr}
|
|
@itemx --adjust-vma @var{incr}
|
|
@cindex changing object addresses
|
|
Change the VMA and LMA addresses of all sections, as well as the start
|
|
address, by adding @var{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.
|
|
|
|
@item --change-section-address @var{section}@{=,+,-@}@var{val}
|
|
@itemx --adjust-section-vma @var{section}@{=,+,-@}@var{val}
|
|
@cindex changing section address
|
|
Set or change both the VMA address and the LMA address of the named
|
|
@var{section}. If @samp{=} is used, the section address is set to
|
|
@var{val}. Otherwise, @var{val} is added to or subtracted from the
|
|
section address. See the comments under @option{--change-addresses},
|
|
above. If @var{section} does not exist in the input file, a warning will
|
|
be issued, unless @option{--no-change-warnings} is used.
|
|
|
|
@item --change-section-lma @var{section}@{=,+,-@}@var{val}
|
|
@cindex changing section LMA
|
|
Set or change the LMA address of the named @var{section}. The LMA
|
|
address is the address where the section will be loaded into memory at
|
|
program load time. Normally this is the same as the VMA address, which
|
|
is the address of the section at program run time, but on some systems,
|
|
especially those where a program is held in ROM, the two can be
|
|
different. If @samp{=} is used, the section address is set to
|
|
@var{val}. Otherwise, @var{val} is added to or subtracted from the
|
|
section address. See the comments under @option{--change-addresses},
|
|
above. If @var{section} does not exist in the input file, a warning
|
|
will be issued, unless @option{--no-change-warnings} is used.
|
|
|
|
@item --change-section-vma @var{section}@{=,+,-@}@var{val}
|
|
@cindex changing section VMA
|
|
Set or change the VMA address of the named @var{section}. The VMA
|
|
address is the address where the section will be located once the
|
|
program has started executing. Normally this is the same as the LMA
|
|
address, which is the address where the section will be loaded into
|
|
memory, but on some systems, especially those where a program is held in
|
|
ROM, the two can be different. If @samp{=} is used, the section address
|
|
is set to @var{val}. Otherwise, @var{val} is added to or subtracted
|
|
from the section address. See the comments under
|
|
@option{--change-addresses}, above. If @var{section} does not exist in
|
|
the input file, a warning will be issued, unless
|
|
@option{--no-change-warnings} is used.
|
|
|
|
@item --change-warnings
|
|
@itemx --adjust-warnings
|
|
If @option{--change-section-address} or @option{--change-section-lma} or
|
|
@option{--change-section-vma} is used, and the named section does not
|
|
exist, issue a warning. This is the default.
|
|
|
|
@item --no-change-warnings
|
|
@itemx --no-adjust-warnings
|
|
Do not issue a warning if @option{--change-section-address} or
|
|
@option{--adjust-section-lma} or @option{--adjust-section-vma} is used, even
|
|
if the named section does not exist.
|
|
|
|
@item --set-section-flags @var{section}=@var{flags}
|
|
Set the flags for the named section. The @var{flags} argument is a
|
|
comma separated string of flag names. The recognized names are
|
|
@samp{alloc}, @samp{contents}, @samp{load}, @samp{noload},
|
|
@samp{readonly}, @samp{code}, @samp{data}, @samp{rom}, @samp{share}, and
|
|
@samp{debug}. You can set the @samp{contents} flag for a section which
|
|
does not have contents, but it is not meaningful to clear the
|
|
@samp{contents} flag of a section which does have contents--just remove
|
|
the section instead. Not all flags are meaningful for all object file
|
|
formats.
|
|
|
|
@item --add-section @var{sectionname}=@var{filename}
|
|
Add a new section named @var{sectionname} while copying the file. The
|
|
contents of the new section are taken from the file @var{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.
|
|
|
|
@item --rename-section @var{oldname}=@var{newname}[,@var{flags}]
|
|
Rename a section from @var{oldname} to @var{newname}, optionally
|
|
changing the section's flags to @var{flags} in the process. This has
|
|
the advantage over usng a linker script to perform the rename in that
|
|
the output stays as an object file and does not become a linked
|
|
executable.
|
|
|
|
This option is particularly helpful when the input format is binary,
|
|
since this will always create a section called .data. If for example,
|
|
you wanted instead to create a section called .rodata containing binary
|
|
data you could use the following command line to achieve it:
|
|
|
|
@smallexample
|
|
objcopy -I binary -O <output_format> -B <architecture> \
|
|
--rename-section .data=.rodata,alloc,load,readonly,data,contents \
|
|
<input_binary_file> <output_object_file>
|
|
@end smallexample
|
|
|
|
@item --long-section-names @{enable,disable,keep@}
|
|
Controls the handling of long section names when processing @code{COFF}
|
|
and @code{PE-COFF} object formats. The default behaviour, @samp{keep},
|
|
is to preserve long section names if any are present in the input file.
|
|
The @samp{enable} and @samp{disable} options forcibly enable or disable
|
|
the use of long section names in the output object; when @samp{disable}
|
|
is in effect, any long section names in the input object will be truncated.
|
|
The @samp{enable} option will only emit long section names if any are
|
|
present in the inputs; this is mostly the same as @samp{keep}, but it
|
|
is left undefined whether the @samp{enable} option might force the
|
|
creation of an empty string table in the output file.
|
|
|
|
@item --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 @command{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.
|
|
|
|
@item --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
|
|
@option{--change-leading-char} because it always changes the symbol name
|
|
when appropriate, regardless of the object file format of the output
|
|
file.
|
|
|
|
@item --reverse-bytes=@var{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: @code{12345678}.
|
|
|
|
Using @samp{--reverse-bytes=2} for the above example, the bytes in the
|
|
output file would be ordered @code{21436587}.
|
|
|
|
Using @samp{--reverse-bytes=4} for the above example, the bytes in the
|
|
output file would be ordered @code{43218765}.
|
|
|
|
By using @samp{--reverse-bytes=2} for the above example, followed by
|
|
@samp{--reverse-bytes=4} on the output file, the bytes in the second
|
|
output file would be ordered @code{34127856}.
|
|
|
|
@item --srec-len=@var{ival}
|
|
Meaningful only for srec output. Set the maximum length of the Srecords
|
|
being produced to @var{ival}. This length covers both address, data and
|
|
crc fields.
|
|
|
|
@item --srec-forceS3
|
|
Meaningful only for srec output. Avoid generation of S1/S2 records,
|
|
creating S3-only record format.
|
|
|
|
@item --redefine-sym @var{old}=@var{new}
|
|
Change the name of a symbol @var{old}, to @var{new}. This can be useful
|
|
when one is trying link two things together for which you have no
|
|
source, and there are name collisions.
|
|
|
|
@item --redefine-syms=@var{filename}
|
|
Apply @option{--redefine-sym} to each symbol pair "@var{old} @var{new}"
|
|
listed in the file @var{filename}. @var{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.
|
|
|
|
@item --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 @option{-R} option to the linker. This option is only effective when
|
|
using an object file format which supports weak symbols.
|
|
|
|
@item --keep-symbols=@var{filename}
|
|
Apply @option{--keep-symbol} option to each symbol listed in the file
|
|
@var{filename}. @var{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.
|
|
|
|
@item --strip-symbols=@var{filename}
|
|
Apply @option{--strip-symbol} option to each symbol listed in the file
|
|
@var{filename}. @var{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.
|
|
|
|
@item --strip-unneeded-symbols=@var{filename}
|
|
Apply @option{--strip-unneeded-symbol} option to each symbol listed in
|
|
the file @var{filename}. @var{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.
|
|
|
|
@item --keep-global-symbols=@var{filename}
|
|
Apply @option{--keep-global-symbol} option to each symbol listed in the
|
|
file @var{filename}. @var{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.
|
|
|
|
@item --localize-symbols=@var{filename}
|
|
Apply @option{--localize-symbol} option to each symbol listed in the file
|
|
@var{filename}. @var{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.
|
|
|
|
@item --globalize-symbols=@var{filename}
|
|
Apply @option{--globalize-symbol} option to each symbol listed in the file
|
|
@var{filename}. @var{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.
|
|
|
|
@item --weaken-symbols=@var{filename}
|
|
Apply @option{--weaken-symbol} option to each symbol listed in the file
|
|
@var{filename}. @var{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.
|
|
|
|
@item --alt-machine-code=@var{index}
|
|
If the output architecture has alternate machine codes, use the
|
|
@var{index}th 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 @var{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.
|
|
|
|
@item --writable-text
|
|
Mark the output text as writable. This option isn't meaningful for all
|
|
object file formats.
|
|
|
|
@item --readonly-text
|
|
Make the output text write protected. This option isn't meaningful for all
|
|
object file formats.
|
|
|
|
@item --pure
|
|
Mark the output file as demand paged. This option isn't meaningful for all
|
|
object file formats.
|
|
|
|
@item --impure
|
|
Mark the output file as impure. This option isn't meaningful for all
|
|
object file formats.
|
|
|
|
@item --prefix-symbols=@var{string}
|
|
Prefix all symbols in the output file with @var{string}.
|
|
|
|
@item --prefix-sections=@var{string}
|
|
Prefix all section names in the output file with @var{string}.
|
|
|
|
@item --prefix-alloc-sections=@var{string}
|
|
Prefix all the names of all allocated sections in the output file with
|
|
@var{string}.
|
|
|
|
@item --add-gnu-debuglink=@var{path-to-file}
|
|
Creates a .gnu_debuglink section which contains a reference to @var{path-to-file}
|
|
and adds it to the output file.
|
|
|
|
@item --keep-file-symbols
|
|
When stripping a file, perhaps with @option{--strip-debug} or
|
|
@option{--strip-unneeded}, retain any symbols specifying source file names,
|
|
which would otherwise get stripped.
|
|
|
|
@item --only-keep-debug
|
|
Strip a file, removing contents of any sections that would not be
|
|
stripped by @option{--strip-debug} and leaving the debugging sections
|
|
intact. In ELF files, this preserves all note sections in the output.
|
|
|
|
The intention is that this option will be used in conjunction with
|
|
@option{--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:
|
|
|
|
@enumerate
|
|
@item Link the executable as normal. Assuming that is is called
|
|
@code{foo} then...
|
|
@item Run @code{objcopy --only-keep-debug foo foo.dbg} to
|
|
create a file containing the debugging info.
|
|
@item Run @code{objcopy --strip-debug foo} to create a
|
|
stripped executable.
|
|
@item Run @code{objcopy --add-gnu-debuglink=foo.dbg foo}
|
|
to add a link to the debugging info into the stripped executable.
|
|
@end enumerate
|
|
|
|
Note---the choice of @code{.dbg} as an extension for the debug info
|
|
file is arbitrary. Also the @code{--only-keep-debug} step is
|
|
optional. You could instead do this:
|
|
|
|
@enumerate
|
|
@item Link the executable as normal.
|
|
@item Copy @code{foo} to @code{foo.full}
|
|
@item Run @code{objcopy --strip-debug foo}
|
|
@item Run @code{objcopy --add-gnu-debuglink=foo.full foo}
|
|
@end enumerate
|
|
|
|
i.e., the file pointed to by the @option{--add-gnu-debuglink} can be the
|
|
full executable. It does not have to be a file created by the
|
|
@option{--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.
|
|
|
|
@item --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 @option{-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 @option{--extract-dwo} option to copy the .dwo sections to
|
|
the .dwo file, then the @option{--strip-dwo} option to remove
|
|
those sections from the original .o file.
|
|
|
|
@item --extract-dwo
|
|
Extract the contents of all DWARF .dwo sections. See the
|
|
@option{--strip-dwo} option for more information.
|
|
|
|
@item --file-alignment @var{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.]
|
|
|
|
@item --heap @var{reserve}
|
|
@itemx --heap @var{reserve},@var{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.]
|
|
|
|
@item --image-base @var{value}
|
|
Use @var{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.]
|
|
|
|
@item --section-alignment @var{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.]
|
|
|
|
@item --stack @var{reserve}
|
|
@itemx --stack @var{reserve},@var{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.]
|
|
|
|
@item --subsystem @var{which}
|
|
@itemx --subsystem @var{which}:@var{major}
|
|
@itemx --subsystem @var{which}:@var{major}.@var{minor}
|
|
Specifies the subsystem under which your program will execute. The
|
|
legal values for @var{which} are @code{native}, @code{windows},
|
|
@code{console}, @code{posix}, @code{efi-app}, @code{efi-bsd},
|
|
@code{efi-rtd}, @code{sal-rtd}, and @code{xbox}. You may optionally set
|
|
the subsystem version also. Numeric values are also accepted for
|
|
@var{which}.
|
|
[This option is specific to PE targets.]
|
|
|
|
@item --extract-symbol
|
|
Keep the file's section flags and symbols but remove all section data.
|
|
Specifically, the option:
|
|
|
|
@itemize
|
|
@item removes the contents of all sections;
|
|
@item sets the size of every section to zero; and
|
|
@item sets the file's start address to zero.
|
|
@end itemize
|
|
|
|
This option is used to build a @file{.sym} file for a VxWorks kernel.
|
|
It can also be a useful way of reducing the size of a @option{--just-symbols}
|
|
linker input file.
|
|
|
|
@item --compress-debug-sections
|
|
Compress DWARF debug sections using zlib.
|
|
|
|
@item --decompress-debug-sections
|
|
Decompress DWARF debug sections using zlib.
|
|
|
|
@item -V
|
|
@itemx --version
|
|
Show the version number of @command{objcopy}.
|
|
|
|
@item -v
|
|
@itemx --verbose
|
|
Verbose output: list all object files modified. In the case of
|
|
archives, @samp{objcopy -V} lists all members of the archive.
|
|
|
|
@item --help
|
|
Show a summary of the options to @command{objcopy}.
|
|
|
|
@item --info
|
|
Display a list showing all architectures and object formats available.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO objcopy
|
|
ld(1), objdump(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node objdump
|
|
@chapter objdump
|
|
|
|
@cindex object file information
|
|
@kindex objdump
|
|
|
|
@c man title objdump display information from object files.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS objdump
|
|
objdump [@option{-a}|@option{--archive-headers}]
|
|
[@option{-b} @var{bfdname}|@option{--target=@var{bfdname}}]
|
|
[@option{-C}|@option{--demangle}[=@var{style}] ]
|
|
[@option{-d}|@option{--disassemble}]
|
|
[@option{-D}|@option{--disassemble-all}]
|
|
[@option{-z}|@option{--disassemble-zeroes}]
|
|
[@option{-EB}|@option{-EL}|@option{--endian=}@{big | little @}]
|
|
[@option{-f}|@option{--file-headers}]
|
|
[@option{-F}|@option{--file-offsets}]
|
|
[@option{--file-start-context}]
|
|
[@option{-g}|@option{--debugging}]
|
|
[@option{-e}|@option{--debugging-tags}]
|
|
[@option{-h}|@option{--section-headers}|@option{--headers}]
|
|
[@option{-i}|@option{--info}]
|
|
[@option{-j} @var{section}|@option{--section=}@var{section}]
|
|
[@option{-l}|@option{--line-numbers}]
|
|
[@option{-S}|@option{--source}]
|
|
[@option{-m} @var{machine}|@option{--architecture=}@var{machine}]
|
|
[@option{-M} @var{options}|@option{--disassembler-options=}@var{options}]
|
|
[@option{-p}|@option{--private-headers}]
|
|
[@option{-P} @var{options}|@option{--private=}@var{options}]
|
|
[@option{-r}|@option{--reloc}]
|
|
[@option{-R}|@option{--dynamic-reloc}]
|
|
[@option{-s}|@option{--full-contents}]
|
|
[@option{-W[lLiaprmfFsoRt]}|
|
|
@option{--dwarf}[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]]
|
|
[@option{-G}|@option{--stabs}]
|
|
[@option{-t}|@option{--syms}]
|
|
[@option{-T}|@option{--dynamic-syms}]
|
|
[@option{-x}|@option{--all-headers}]
|
|
[@option{-w}|@option{--wide}]
|
|
[@option{--start-address=}@var{address}]
|
|
[@option{--stop-address=}@var{address}]
|
|
[@option{--prefix-addresses}]
|
|
[@option{--[no-]show-raw-insn}]
|
|
[@option{--adjust-vma=}@var{offset}]
|
|
[@option{--special-syms}]
|
|
[@option{--prefix=}@var{prefix}]
|
|
[@option{--prefix-strip=}@var{level}]
|
|
[@option{--insn-width=}@var{width}]
|
|
[@option{-V}|@option{--version}]
|
|
[@option{-H}|@option{--help}]
|
|
@var{objfile}@dots{}
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION objdump
|
|
|
|
@command{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.
|
|
|
|
@var{objfile}@dots{} are the object files to be examined. When you
|
|
specify archives, @command{objdump} shows information on each of the member
|
|
object files.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS objdump
|
|
|
|
The long and short forms of options, shown here as alternatives, are
|
|
equivalent. At least one option from the list
|
|
@option{-a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-P,-r,-R,-s,-S,-t,-T,-V,-x} must be given.
|
|
|
|
@table @env
|
|
@item -a
|
|
@itemx --archive-header
|
|
@cindex archive headers
|
|
If any of the @var{objfile} files are archives, display the archive
|
|
header information (in a format similar to @samp{ls -l}). Besides the
|
|
information you could list with @samp{ar tv}, @samp{objdump -a} shows
|
|
the object file format of each archive member.
|
|
|
|
@item --adjust-vma=@var{offset}
|
|
@cindex section addresses in objdump
|
|
@cindex VMA in objdump
|
|
When dumping information, first add @var{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.
|
|
|
|
@item -b @var{bfdname}
|
|
@itemx --target=@var{bfdname}
|
|
@cindex object code format
|
|
Specify that the object-code format for the object files is
|
|
@var{bfdname}. This option may not be necessary; @var{objdump} can
|
|
automatically recognize many formats.
|
|
|
|
For example,
|
|
@example
|
|
objdump -b oasys -m vax -h fu.o
|
|
@end example
|
|
@noindent
|
|
displays summary information from the section headers (@option{-h}) of
|
|
@file{fu.o}, which is explicitly identified (@option{-m}) as a VAX object
|
|
file in the format produced by Oasys compilers. You can list the
|
|
formats available with the @option{-i} option.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -C
|
|
@itemx --demangle[=@var{style}]
|
|
@cindex demangling in objdump
|
|
Decode (@dfn{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. @xref{c++filt},
|
|
for more information on demangling.
|
|
|
|
@item -g
|
|
@itemx --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 @option{-W} option to print any DWARF information in
|
|
the file.
|
|
|
|
@item -e
|
|
@itemx --debugging-tags
|
|
Like @option{-g}, but the information is generated in a format compatible
|
|
with ctags tool.
|
|
|
|
@item -d
|
|
@itemx --disassemble
|
|
@cindex disassembling object code
|
|
@cindex machine instructions
|
|
Display the assembler mnemonics for the machine instructions from
|
|
@var{objfile}. This option only disassembles those sections which are
|
|
expected to contain instructions.
|
|
|
|
@item -D
|
|
@itemx --disassemble-all
|
|
Like @option{-d}, but disassemble the contents of all sections, not just
|
|
those expected to contain instructions.
|
|
|
|
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.
|
|
|
|
@item --prefix-addresses
|
|
When disassembling, print the complete address on each line. This is
|
|
the older disassembly format.
|
|
|
|
@item -EB
|
|
@itemx -EL
|
|
@itemx --endian=@{big|little@}
|
|
@cindex endianness
|
|
@cindex disassembly endianness
|
|
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.
|
|
|
|
@item -f
|
|
@itemx --file-headers
|
|
@cindex object file header
|
|
Display summary information from the overall header of
|
|
each of the @var{objfile} files.
|
|
|
|
@item -F
|
|
@itemx --file-offsets
|
|
@cindex object 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.
|
|
|
|
@item --file-start-context
|
|
@cindex source code context
|
|
Specify that when displaying interlisted source code/disassembly
|
|
(assumes @option{-S}) from a file that has not yet been displayed, extend the
|
|
context to the start of the file.
|
|
|
|
@item -h
|
|
@itemx --section-headers
|
|
@itemx --headers
|
|
@cindex section 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 @option{-Ttext}, @option{-Tdata}, or @option{-Tbss} options to
|
|
@command{ld}. However, some object file formats, such as a.out, do not
|
|
store the starting address of the file segments. In those situations,
|
|
although @command{ld} relocates the sections correctly, using @samp{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.
|
|
|
|
@item -H
|
|
@itemx --help
|
|
Print a summary of the options to @command{objdump} and exit.
|
|
|
|
@item -i
|
|
@itemx --info
|
|
@cindex architectures available
|
|
@cindex object formats available
|
|
Display a list showing all architectures and object formats available
|
|
for specification with @option{-b} or @option{-m}.
|
|
|
|
@item -j @var{name}
|
|
@itemx --section=@var{name}
|
|
@cindex section information
|
|
Display information only for section @var{name}.
|
|
|
|
@item -l
|
|
@itemx --line-numbers
|
|
@cindex source filenames for object files
|
|
Label the display (using debugging information) with the filename and
|
|
source line numbers corresponding to the object code or relocs shown.
|
|
Only useful with @option{-d}, @option{-D}, or @option{-r}.
|
|
|
|
@item -m @var{machine}
|
|
@itemx --architecture=@var{machine}
|
|
@cindex architecture
|
|
@cindex disassembly architecture
|
|
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 @option{-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 @var{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 @option{-marm}.
|
|
|
|
@item -M @var{options}
|
|
@itemx --disassembler-options=@var{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 @option{-M} options can be used or
|
|
can be placed together into a comma separated list.
|
|
|
|
If the target is an ARM architecture then this switch can be used to
|
|
select which register name set is used during disassembler. Specifying
|
|
@option{-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
|
|
@option{-M reg-names-apcs} will select the name set used by the ARM
|
|
Procedure Call Standard, whilst specifying @option{-M reg-names-raw} will
|
|
just use @samp{r} followed by the register number.
|
|
|
|
There are also two variants on the APCS register naming scheme enabled
|
|
by @option{-M reg-names-atpcs} and @option{-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 @option{--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 @option{-m}
|
|
switch, but allow finer grained control. Multiple selections from the
|
|
following may be specified as a comma separated string.
|
|
@option{x86-64}, @option{i386} and @option{i8086} select disassembly for
|
|
the given architecture. @option{intel} and @option{att} select between
|
|
intel syntax mode and AT&T syntax mode.
|
|
@option{intel-mnemonic} and @option{att-mnemonic} select between
|
|
intel mnemonic mode and AT&T mnemonic mode. @option{intel-mnemonic}
|
|
implies @option{intel} and @option{att-mnemonic} implies @option{att}.
|
|
@option{addr64}, @option{addr32},
|
|
@option{addr16}, @option{data32} and @option{data16} specify the default
|
|
address size and operand size. These four options will be overridden if
|
|
@option{x86-64}, @option{i386} or @option{i8086} appear later in the
|
|
option string. Lastly, @option{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, @option{booke} controls the disassembly of BookE
|
|
instructions. @option{32} and @option{64} select PowerPC and
|
|
PowerPC64 disassembly, respectively. @option{e300} selects
|
|
disassembly for the e300 family. @option{440} selects disassembly for
|
|
the PowerPC 440. @option{ppcps} selects disassembly for the paired
|
|
single instructions of the PPC750CL.
|
|
|
|
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:
|
|
|
|
@table @code
|
|
@item 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.
|
|
|
|
@item gpr-names=@var{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.
|
|
|
|
@item fpr-names=@var{ABI}
|
|
Print FPR (floating-point register) names as
|
|
appropriate for the specified ABI. By default, FPR numbers are printed
|
|
rather than names.
|
|
|
|
@item cp0-names=@var{ARCH}
|
|
Print CP0 (system control coprocessor; coprocessor 0) register names
|
|
as appropriate for the CPU or architecture specified by
|
|
@var{ARCH}. By default, CP0 register names are selected according to
|
|
the architecture and CPU of the binary being disassembled.
|
|
|
|
@item hwr-names=@var{ARCH}
|
|
Print HWR (hardware register, used by the @code{rdhwr} instruction) names
|
|
as appropriate for the CPU or architecture specified by
|
|
@var{ARCH}. By default, HWR names are selected according to
|
|
the architecture and CPU of the binary being disassembled.
|
|
|
|
@item reg-names=@var{ABI}
|
|
Print GPR and FPR names as appropriate for the selected ABI.
|
|
|
|
@item reg-names=@var{ARCH}
|
|
Print CPU-specific register names (CP0 register and HWR names)
|
|
as appropriate for the selected CPU or architecture.
|
|
@end table
|
|
|
|
For any of the options listed above, @var{ABI} or
|
|
@var{ARCH} may be specified as @samp{numeric} to have numbers printed
|
|
rather than names, for the selected types of registers.
|
|
You can list the available values of @var{ABI} and @var{ARCH} using
|
|
the @option{--help} option.
|
|
|
|
For VAX, you can specify function entry addresses with @option{-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.
|
|
|
|
@item -p
|
|
@itemx --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.
|
|
|
|
@item -P @var{options}
|
|
@itemx --private=@var{options}
|
|
Print information that is specific to the object file format. The
|
|
argument @var{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: @option{header}, @option{aout},
|
|
@option{sections}, @option{syms}, @option{relocs}, @option{lineno},
|
|
@option{loader}, @option{except}, @option{typchk}, @option{traceback}
|
|
and @option{toc}.
|
|
|
|
@item -r
|
|
@itemx --reloc
|
|
@cindex relocation entries, in object file
|
|
Print the relocation entries of the file. If used with @option{-d} or
|
|
@option{-D}, the relocations are printed interspersed with the
|
|
disassembly.
|
|
|
|
@item -R
|
|
@itemx --dynamic-reloc
|
|
@cindex dynamic relocation entries, in object file
|
|
Print the dynamic relocation entries of the file. This is only
|
|
meaningful for dynamic objects, such as certain types of shared
|
|
libraries. As for @option{-r}, if used with @option{-d} or
|
|
@option{-D}, the relocations are printed interspersed with the
|
|
disassembly.
|
|
|
|
@item -s
|
|
@itemx --full-contents
|
|
@cindex sections, full contents
|
|
@cindex object file sections
|
|
Display the full contents of any sections requested. By default all
|
|
non-empty sections are displayed.
|
|
|
|
@item -S
|
|
@itemx --source
|
|
@cindex source disassembly
|
|
@cindex disassembly, with source
|
|
Display source code intermixed with disassembly, if possible. Implies
|
|
@option{-d}.
|
|
|
|
@item --prefix=@var{prefix}
|
|
@cindex Add prefix to absolute paths
|
|
Specify @var{prefix} to add to the absolute paths when used with
|
|
@option{-S}.
|
|
|
|
@item --prefix-strip=@var{level}
|
|
@cindex Strip absolute paths
|
|
Indicate how many initial directory names to strip off the hardwired
|
|
absolute paths. It has no effect without @option{--prefix=}@var{prefix}.
|
|
|
|
@item --show-raw-insn
|
|
When disassembling instructions, print the instruction in hex as well as
|
|
in symbolic form. This is the default except when
|
|
@option{--prefix-addresses} is used.
|
|
|
|
@item --no-show-raw-insn
|
|
When disassembling instructions, do not print the instruction bytes.
|
|
This is the default when @option{--prefix-addresses} is used.
|
|
|
|
@item --insn-width=@var{width}
|
|
@cindex Instruction width
|
|
Display @var{width} bytes on a single line when disassembling
|
|
instructions.
|
|
|
|
@item -W[lLiaprmfFsoRt]
|
|
@itemx --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]
|
|
@cindex DWARF
|
|
@cindex debug symbols
|
|
Displays the contents of the debug sections in the file, if any are
|
|
present. If one of the optional letters or words follows the switch
|
|
then only data found in those specific sections will be dumped.
|
|
|
|
Note that there is no single letter option to display the content of
|
|
trace sections or .gdb_index.
|
|
|
|
Note: the output from the @option{=info} option can also be affected
|
|
by the options @option{--dwarf-depth}, the @option{--dwarf-start} and
|
|
the @option{--dwarf-check}.
|
|
|
|
@item --dwarf-depth=@var{n}
|
|
Limit the dump of the @code{.debug_info} section to @var{n} children.
|
|
This is only useful with @option{--dwarf=info}. The default is
|
|
to print all DIEs; the special value 0 for @var{n} will also have this
|
|
effect.
|
|
|
|
With a non-zero value for @var{n}, DIEs at or deeper than @var{n}
|
|
levels will not be printed. The range for @var{n} is zero-based.
|
|
|
|
@item --dwarf-start=@var{n}
|
|
Print only DIEs beginning with the DIE numbered @var{n}. This is only
|
|
useful with @option{--dwarf=info}.
|
|
|
|
If specified, this option will suppress printing of any header
|
|
information and all DIEs before the DIE numbered @var{n}. Only
|
|
siblings and children of the specified DIE will be printed.
|
|
|
|
This can be used in conjunction with @option{--dwarf-depth}.
|
|
|
|
@item --dwarf-check
|
|
Enable additional checks for consistency of Dwarf information.
|
|
|
|
@item -G
|
|
@itemx --stabs
|
|
@cindex stab
|
|
@cindex .stab
|
|
@cindex debug symbols
|
|
@cindex ELF object file format
|
|
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
|
|
@code{.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 @option{--syms}
|
|
output.
|
|
@ifclear man
|
|
For more information on stabs symbols, see @ref{Top,Stabs,Stabs
|
|
Overview,stabs.info, The ``stabs'' debug format}.
|
|
@end ifclear
|
|
|
|
@item --start-address=@var{address}
|
|
@cindex start-address
|
|
Start displaying data at the specified address. This affects the output
|
|
of the @option{-d}, @option{-r} and @option{-s} options.
|
|
|
|
@item --stop-address=@var{address}
|
|
@cindex stop-address
|
|
Stop displaying data at the specified address. This affects the output
|
|
of the @option{-d}, @option{-r} and @option{-s} options.
|
|
|
|
@item -t
|
|
@itemx --syms
|
|
@cindex symbol table entries, printing
|
|
Print the symbol table entries of the file.
|
|
This is similar to the information provided by the @samp{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:
|
|
|
|
@smallexample
|
|
[ 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
|
|
@end smallexample
|
|
|
|
where the number inside the square brackets is the number of the entry
|
|
in the symbol table, the @var{sec} number is the section number, the
|
|
@var{fl} value are the symbol's flag bits, the @var{ty} number is the
|
|
symbol's type, the @var{scl} number is the symbol's storage class and
|
|
the @var{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:
|
|
|
|
@smallexample
|
|
00000000 l d .bss 00000000 .bss
|
|
00000000 g .text 00000000 fred
|
|
@end smallexample
|
|
|
|
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 @emph{*ABS*} if the section is absolute (ie
|
|
not connected with any section), or @emph{*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:
|
|
@table @code
|
|
@item l
|
|
@itemx g
|
|
@itemx u
|
|
@itemx !
|
|
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.
|
|
|
|
@item w
|
|
The symbol is weak (w) or strong (a space).
|
|
|
|
@item C
|
|
The symbol denotes a constructor (C) or an ordinary symbol (a space).
|
|
|
|
@item 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.
|
|
|
|
@item I
|
|
@item 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).
|
|
|
|
@item d
|
|
@itemx D
|
|
The symbol is a debugging symbol (d) or a dynamic symbol (D) or a
|
|
normal symbol (a space).
|
|
|
|
@item F
|
|
@item f
|
|
@item 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).
|
|
@end table
|
|
|
|
@item -T
|
|
@itemx --dynamic-syms
|
|
@cindex dynamic symbol table entries, printing
|
|
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 @samp{nm}
|
|
program when given the @option{-D} (@option{--dynamic}) option.
|
|
|
|
@item --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.
|
|
|
|
@item -V
|
|
@itemx --version
|
|
Print the version number of @command{objdump} and exit.
|
|
|
|
@item -x
|
|
@itemx --all-headers
|
|
@cindex all header information, object file
|
|
@cindex header information, all
|
|
Display all available header information, including the symbol table and
|
|
relocation entries. Using @option{-x} is equivalent to specifying all of
|
|
@option{-a -f -h -p -r -t}.
|
|
|
|
@item -w
|
|
@itemx --wide
|
|
@cindex wide output, printing
|
|
Format some lines for output devices that have more than 80 columns.
|
|
Also do not truncate symbol names when they are displayed.
|
|
|
|
@item -z
|
|
@itemx --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.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO objdump
|
|
nm(1), readelf(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node ranlib
|
|
@chapter ranlib
|
|
|
|
@kindex ranlib
|
|
@cindex archive contents
|
|
@cindex symbol index
|
|
|
|
@c man title ranlib generate index to archive.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS ranlib
|
|
ranlib [@option{--plugin} @var{name}] [@option{-DhHvVt}] @var{archive}
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION ranlib
|
|
|
|
@command{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 @samp{nm -s} or @samp{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 @sc{gnu} @command{ranlib} program is another form of @sc{gnu} @command{ar}; running
|
|
@command{ranlib} is completely equivalent to executing @samp{ar -s}.
|
|
@xref{ar}.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS ranlib
|
|
|
|
@table @env
|
|
@item -h
|
|
@itemx -H
|
|
@itemx --help
|
|
Show usage information for @command{ranlib}.
|
|
|
|
@item -v
|
|
@itemx -V
|
|
@itemx --version
|
|
Show the version number of @command{ranlib}.
|
|
|
|
@item -D
|
|
@cindex deterministic archives
|
|
@kindex --enable-deterministic-archives
|
|
Operate in @emph{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.
|
|
|
|
This is the default unless @file{binutils} was configured with
|
|
@option{--enable-deterministic-archives}.
|
|
|
|
@item -t
|
|
Update the timestamp of the symbol map of an archive.
|
|
|
|
@item -U
|
|
@cindex deterministic archives
|
|
@kindex --enable-deterministic-archives
|
|
Do @emph{not} operate in @emph{deterministic} mode. This is the
|
|
inverse of the @samp{-D} option, above: the archive index will get
|
|
actual UID, GID, timestamp, and file mode values.
|
|
|
|
This is the default unless @file{binutils} was configured with
|
|
@option{--enable-deterministic-archives}.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO ranlib
|
|
ar(1), nm(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node size
|
|
@chapter size
|
|
|
|
@kindex size
|
|
@cindex section sizes
|
|
|
|
@c man title size list section sizes and total size.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS size
|
|
size [@option{-A}|@option{-B}|@option{--format=}@var{compatibility}]
|
|
[@option{--help}]
|
|
[@option{-d}|@option{-o}|@option{-x}|@option{--radix=}@var{number}]
|
|
[@option{--common}]
|
|
[@option{-t}|@option{--totals}]
|
|
[@option{--target=}@var{bfdname}] [@option{-V}|@option{--version}]
|
|
[@var{objfile}@dots{}]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION size
|
|
|
|
The @sc{gnu} @command{size} utility lists the section sizes---and the total
|
|
size---for each of the object or archive files @var{objfile} in its
|
|
argument list. By default, one line of output is generated for each
|
|
object file or each module in an archive.
|
|
|
|
@var{objfile}@dots{} are the object files to be examined.
|
|
If none are specified, the file @code{a.out} will be used.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS size
|
|
|
|
The command line options have the following meanings:
|
|
|
|
@table @env
|
|
@item -A
|
|
@itemx -B
|
|
@itemx --format=@var{compatibility}
|
|
@cindex @command{size} display format
|
|
Using one of these options, you can choose whether the output from @sc{gnu}
|
|
@command{size} resembles output from System V @command{size} (using @option{-A},
|
|
or @option{--format=sysv}), or Berkeley @command{size} (using @option{-B}, or
|
|
@option{--format=berkeley}). The default is the one-line format similar to
|
|
Berkeley's.
|
|
@c Bonus for doc-source readers: you can also say --format=strange (or
|
|
@c anything else that starts with 's') for sysv, and --format=boring (or
|
|
@c anything else that starts with 'b') for Berkeley.
|
|
|
|
Here is an example of the Berkeley (default) format of output from
|
|
@command{size}:
|
|
@smallexample
|
|
$ size --format=Berkeley ranlib size
|
|
text data bss dec hex filename
|
|
294880 81920 11592 388392 5ed28 ranlib
|
|
294880 81920 11888 388688 5ee50 size
|
|
@end smallexample
|
|
|
|
@noindent
|
|
This is the same data, but displayed closer to System V conventions:
|
|
|
|
@smallexample
|
|
$ 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
|
|
@end smallexample
|
|
|
|
@item --help
|
|
Show a summary of acceptable arguments and options.
|
|
|
|
@item -d
|
|
@itemx -o
|
|
@itemx -x
|
|
@itemx --radix=@var{number}
|
|
@cindex @command{size} number format
|
|
@cindex radix for section sizes
|
|
Using one of these options, you can control whether the size of each
|
|
section is given in decimal (@option{-d}, or @option{--radix=10}); octal
|
|
(@option{-o}, or @option{--radix=8}); or hexadecimal (@option{-x}, or
|
|
@option{--radix=16}). In @option{--radix=@var{number}}, only the three
|
|
values (8, 10, 16) are supported. The total size is always given in two
|
|
radices; decimal and hexadecimal for @option{-d} or @option{-x} output, or
|
|
octal and hexadecimal if you're using @option{-o}.
|
|
|
|
@item --common
|
|
Print total size of common symbols in each file. When using Berkeley
|
|
format these are included in the bss size.
|
|
|
|
@item -t
|
|
@itemx --totals
|
|
Show totals of all objects listed (Berkeley format listing mode only).
|
|
|
|
@item --target=@var{bfdname}
|
|
@cindex object code format
|
|
Specify that the object-code format for @var{objfile} is
|
|
@var{bfdname}. This option may not be necessary; @command{size} can
|
|
automatically recognize many formats.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -V
|
|
@itemx --version
|
|
Display the version number of @command{size}.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO size
|
|
ar(1), objdump(1), readelf(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node strings
|
|
@chapter strings
|
|
@kindex strings
|
|
@cindex listings strings
|
|
@cindex printing strings
|
|
@cindex strings, printing
|
|
|
|
@c man title strings print the strings of printable characters in files.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS strings
|
|
strings [@option{-afovV}] [@option{-}@var{min-len}]
|
|
[@option{-n} @var{min-len}] [@option{--bytes=}@var{min-len}]
|
|
[@option{-t} @var{radix}] [@option{--radix=}@var{radix}]
|
|
[@option{-e} @var{encoding}] [@option{--encoding=}@var{encoding}]
|
|
[@option{-}] [@option{--all}] [@option{--print-file-name}]
|
|
[@option{-T} @var{bfdname}] [@option{--target=}@var{bfdname}]
|
|
[@option{--help}] [@option{--version}] @var{file}@dots{}
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION strings
|
|
|
|
For each @var{file} given, @sc{gnu} @command{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. By default, it only prints the strings from the initialized
|
|
and loaded sections of object files; for other types of files, it prints
|
|
the strings from the whole file.
|
|
|
|
@command{strings} is mainly useful for determining the contents of non-text
|
|
files.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS strings
|
|
|
|
@table @env
|
|
@item -a
|
|
@itemx --all
|
|
@itemx -
|
|
Do not scan only the initialized and loaded sections of object files;
|
|
scan the whole files.
|
|
|
|
@item -f
|
|
@itemx --print-file-name
|
|
Print the name of the file before each string.
|
|
|
|
@item --help
|
|
Print a summary of the program usage on the standard output and exit.
|
|
|
|
@item -@var{min-len}
|
|
@itemx -n @var{min-len}
|
|
@itemx --bytes=@var{min-len}
|
|
Print sequences of characters that are at least @var{min-len} characters
|
|
long, instead of the default 4.
|
|
|
|
@item -o
|
|
Like @samp{-t o}. Some other versions of @command{strings} have @option{-o}
|
|
act like @samp{-t d} instead. Since we can not be compatible with both
|
|
ways, we simply chose one.
|
|
|
|
@item -t @var{radix}
|
|
@itemx --radix=@var{radix}
|
|
Print the offset within the file before each string. The single
|
|
character argument specifies the radix of the offset---@samp{o} for
|
|
octal, @samp{x} for hexadecimal, or @samp{d} for decimal.
|
|
|
|
@item -e @var{encoding}
|
|
@itemx --encoding=@var{encoding}
|
|
Select the character encoding of the strings that are to be found.
|
|
Possible values for @var{encoding} are: @samp{s} = single-7-bit-byte
|
|
characters (ASCII, ISO 8859, etc., default), @samp{S} =
|
|
single-8-bit-byte characters, @samp{b} = 16-bit bigendian, @samp{l} =
|
|
16-bit littleendian, @samp{B} = 32-bit bigendian, @samp{L} = 32-bit
|
|
littleendian. Useful for finding wide character strings. (@samp{l}
|
|
and @samp{b} apply to, for example, Unicode UTF-16/UCS-2 encodings).
|
|
|
|
@item -T @var{bfdname}
|
|
@itemx --target=@var{bfdname}
|
|
@cindex object code format
|
|
Specify an object code format other than your system's default format.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -v
|
|
@itemx -V
|
|
@itemx --version
|
|
Print the program version number on the standard output and exit.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO strings
|
|
ar(1), nm(1), objdump(1), ranlib(1), readelf(1)
|
|
and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node strip
|
|
@chapter strip
|
|
|
|
@kindex strip
|
|
@cindex removing symbols
|
|
@cindex discarding symbols
|
|
@cindex symbols, discarding
|
|
|
|
@c man title strip Discard symbols from object files.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS strip
|
|
strip [@option{-F} @var{bfdname} |@option{--target=}@var{bfdname}]
|
|
[@option{-I} @var{bfdname} |@option{--input-target=}@var{bfdname}]
|
|
[@option{-O} @var{bfdname} |@option{--output-target=}@var{bfdname}]
|
|
[@option{-s}|@option{--strip-all}]
|
|
[@option{-S}|@option{-g}|@option{-d}|@option{--strip-debug}]
|
|
[@option{--strip-dwo}]
|
|
[@option{-K} @var{symbolname} |@option{--keep-symbol=}@var{symbolname}]
|
|
[@option{-N} @var{symbolname} |@option{--strip-symbol=}@var{symbolname}]
|
|
[@option{-w}|@option{--wildcard}]
|
|
[@option{-x}|@option{--discard-all}] [@option{-X} |@option{--discard-locals}]
|
|
[@option{-R} @var{sectionname} |@option{--remove-section=}@var{sectionname}]
|
|
[@option{-o} @var{file}] [@option{-p}|@option{--preserve-dates}]
|
|
[@option{-D}|@option{--enable-deterministic-archives}]
|
|
[@option{--keep-file-symbols}]
|
|
[@option{--only-keep-debug}]
|
|
[@option{-v} |@option{--verbose}] [@option{-V}|@option{--version}]
|
|
[@option{--help}] [@option{--info}]
|
|
@var{objfile}@dots{}
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION strip
|
|
|
|
@sc{gnu} @command{strip} discards all symbols from object files
|
|
@var{objfile}. The list of object files may include archives.
|
|
At least one object file must be given.
|
|
|
|
@command{strip} modifies the files named in its argument,
|
|
rather than writing modified copies under different names.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS strip
|
|
|
|
@table @env
|
|
@item -F @var{bfdname}
|
|
@itemx --target=@var{bfdname}
|
|
Treat the original @var{objfile} as a file with the object
|
|
code format @var{bfdname}, and rewrite it in the same format.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item --help
|
|
Show a summary of the options to @command{strip} and exit.
|
|
|
|
@item --info
|
|
Display a list showing all architectures and object formats available.
|
|
|
|
@item -I @var{bfdname}
|
|
@itemx --input-target=@var{bfdname}
|
|
Treat the original @var{objfile} as a file with the object
|
|
code format @var{bfdname}.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -O @var{bfdname}
|
|
@itemx --output-target=@var{bfdname}
|
|
Replace @var{objfile} with a file in the output format @var{bfdname}.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -R @var{sectionname}
|
|
@itemx --remove-section=@var{sectionname}
|
|
Remove any section named @var{sectionname} from the output file. This
|
|
option may be given more than once. Note that using this option
|
|
inappropriately may make the output file unusable.
|
|
|
|
@item -s
|
|
@itemx --strip-all
|
|
Remove all symbols.
|
|
|
|
@item -g
|
|
@itemx -S
|
|
@itemx -d
|
|
@itemx --strip-debug
|
|
Remove debugging symbols only.
|
|
|
|
@item --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 @command{objcopy} section
|
|
for more information.
|
|
|
|
@item --strip-unneeded
|
|
Remove all symbols that are not needed for relocation processing.
|
|
|
|
@item -K @var{symbolname}
|
|
@itemx --keep-symbol=@var{symbolname}
|
|
When stripping symbols, keep symbol @var{symbolname} even if it would
|
|
normally be stripped. This option may be given more than once.
|
|
|
|
@item -N @var{symbolname}
|
|
@itemx --strip-symbol=@var{symbolname}
|
|
Remove symbol @var{symbolname} from the source file. This option may be
|
|
given more than once, and may be combined with strip options other than
|
|
@option{-K}.
|
|
|
|
@item -o @var{file}
|
|
Put the stripped output in @var{file}, rather than replacing the
|
|
existing file. When this argument is used, only one @var{objfile}
|
|
argument may be specified.
|
|
|
|
@item -p
|
|
@itemx --preserve-dates
|
|
Preserve the access and modification dates of the file.
|
|
|
|
@item -D
|
|
@itemx --enable-deterministic-archives
|
|
Operate in @emph{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.
|
|
|
|
@item -w
|
|
@itemx --wildcard
|
|
Permit regular expressions in @var{symbolname}s 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:
|
|
|
|
@smallexample
|
|
-w -K !foo -K fo*
|
|
@end smallexample
|
|
|
|
would cause strip to only keep symbols that start with the letters
|
|
``fo'', but to discard the symbol ``foo''.
|
|
|
|
@item -x
|
|
@itemx --discard-all
|
|
Remove non-global symbols.
|
|
|
|
@item -X
|
|
@itemx --discard-locals
|
|
Remove compiler-generated local symbols.
|
|
(These usually start with @samp{L} or @samp{.}.)
|
|
|
|
@item --keep-file-symbols
|
|
When stripping a file, perhaps with @option{--strip-debug} or
|
|
@option{--strip-unneeded}, retain any symbols specifying source file names,
|
|
which would otherwise get stripped.
|
|
|
|
@item --only-keep-debug
|
|
Strip a file, removing contents of any sections that would not be
|
|
stripped by @option{--strip-debug} and leaving the debugging sections
|
|
intact. In ELF files, this preserves all note sections in the output.
|
|
|
|
The intention is that this option will be used in conjunction with
|
|
@option{--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:
|
|
|
|
@enumerate
|
|
@item Link the executable as normal. Assuming that is is called
|
|
@code{foo} then...
|
|
@item Run @code{objcopy --only-keep-debug foo foo.dbg} to
|
|
create a file containing the debugging info.
|
|
@item Run @code{objcopy --strip-debug foo} to create a
|
|
stripped executable.
|
|
@item Run @code{objcopy --add-gnu-debuglink=foo.dbg foo}
|
|
to add a link to the debugging info into the stripped executable.
|
|
@end enumerate
|
|
|
|
Note---the choice of @code{.dbg} as an extension for the debug info
|
|
file is arbitrary. Also the @code{--only-keep-debug} step is
|
|
optional. You could instead do this:
|
|
|
|
@enumerate
|
|
@item Link the executable as normal.
|
|
@item Copy @code{foo} to @code{foo.full}
|
|
@item Run @code{strip --strip-debug foo}
|
|
@item Run @code{objcopy --add-gnu-debuglink=foo.full foo}
|
|
@end enumerate
|
|
|
|
i.e., the file pointed to by the @option{--add-gnu-debuglink} can be the
|
|
full executable. It does not have to be a file created by the
|
|
@option{--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.
|
|
|
|
@item -V
|
|
@itemx --version
|
|
Show the version number for @command{strip}.
|
|
|
|
@item -v
|
|
@itemx --verbose
|
|
Verbose output: list all object files modified. In the case of
|
|
archives, @samp{strip -v} lists all members of the archive.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO strip
|
|
the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node c++filt, addr2line, elfedit, Top
|
|
@chapter c++filt
|
|
|
|
@kindex c++filt
|
|
@cindex demangling C++ symbols
|
|
|
|
@c man title cxxfilt Demangle C++ and Java symbols.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS cxxfilt
|
|
c++filt [@option{-_}|@option{--strip-underscore}]
|
|
[@option{-n}|@option{--no-strip-underscore}]
|
|
[@option{-p}|@option{--no-params}]
|
|
[@option{-t}|@option{--types}]
|
|
[@option{-i}|@option{--no-verbose}]
|
|
[@option{-s} @var{format}|@option{--format=}@var{format}]
|
|
[@option{--help}] [@option{--version}] [@var{symbol}@dots{}]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION cxxfilt
|
|
|
|
@kindex cxxfilt
|
|
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 @dfn{mangling}. The
|
|
@command{c++filt}
|
|
@footnote{MS-DOS does not allow @kbd{+} characters in file names, so on
|
|
MS-DOS this program is named @command{CXXFILT}.}
|
|
program does the inverse mapping: it decodes (@dfn{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 @command{c++filt} and see the same source file
|
|
containing demangled names.
|
|
|
|
You can also use @command{c++filt} to decipher individual symbols by
|
|
passing them on the command line:
|
|
|
|
@example
|
|
c++filt @var{symbol}
|
|
@end example
|
|
|
|
If no @var{symbol} arguments are given, @command{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:
|
|
|
|
@smallexample
|
|
c++filt -n _Z1fv
|
|
@end smallexample
|
|
|
|
will work and demangle the name to ``f()'' whereas:
|
|
|
|
@smallexample
|
|
c++filt -n _Z1fv,
|
|
@end smallexample
|
|
|
|
will not work. (Note the extra comma at the end of the mangled
|
|
name which makes it invalid). This command however will work:
|
|
|
|
@smallexample
|
|
echo _Z1fv, | c++filt -n
|
|
@end smallexample
|
|
|
|
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:
|
|
|
|
@smallexample
|
|
.type _Z1fv, @@function
|
|
@end smallexample
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS cxxfilt
|
|
|
|
@table @env
|
|
@item -_
|
|
@itemx --strip-underscore
|
|
On some systems, both the C and C++ compilers put an underscore in front
|
|
of every name. For example, the C name @code{foo} gets the low-level
|
|
name @code{_foo}. This option removes the initial underscore. Whether
|
|
@command{c++filt} removes the underscore by default is target dependent.
|
|
|
|
@item -n
|
|
@itemx --no-strip-underscore
|
|
Do not remove the initial underscore.
|
|
|
|
@item -p
|
|
@itemx --no-params
|
|
When demangling the name of a function, do not display the types of
|
|
the function's parameters.
|
|
|
|
@item -t
|
|
@itemx --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''.
|
|
|
|
@item -i
|
|
@itemx --no-verbose
|
|
Do not include implementation details (if any) in the demangled
|
|
output.
|
|
|
|
@item -s @var{format}
|
|
@itemx --format=@var{format}
|
|
@command{c++filt} can decode various methods of mangling, used by
|
|
different compilers. The argument to this option selects which
|
|
method it uses:
|
|
|
|
@table @code
|
|
@item auto
|
|
Automatic selection based on executable (the default method)
|
|
@item gnu
|
|
the one used by the @sc{gnu} C++ compiler (g++)
|
|
@item lucid
|
|
the one used by the Lucid compiler (lcc)
|
|
@item arm
|
|
the one specified by the C++ Annotated Reference Manual
|
|
@item hp
|
|
the one used by the HP compiler (aCC)
|
|
@item edg
|
|
the one used by the EDG compiler
|
|
@item gnu-v3
|
|
the one used by the @sc{gnu} C++ compiler (g++) with the V3 ABI.
|
|
@item java
|
|
the one used by the @sc{gnu} Java compiler (gcj)
|
|
@item gnat
|
|
the one used by the @sc{gnu} Ada compiler (GNAT).
|
|
@end table
|
|
|
|
@item --help
|
|
Print a summary of the options to @command{c++filt} and exit.
|
|
|
|
@item --version
|
|
Print the version number of @command{c++filt} and exit.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO cxxfilt
|
|
the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@quotation
|
|
@emph{Warning:} @command{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,
|
|
|
|
@example
|
|
c++filt @var{symbol}
|
|
@end example
|
|
|
|
@noindent
|
|
may in a future release become
|
|
|
|
@example
|
|
c++filt @var{option} @var{symbol}
|
|
@end example
|
|
@end quotation
|
|
|
|
@node addr2line
|
|
@chapter addr2line
|
|
|
|
@kindex addr2line
|
|
@cindex address to file name and line number
|
|
|
|
@c man title addr2line convert addresses into file names and line numbers.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS addr2line
|
|
addr2line [@option{-a}|@option{--addresses}]
|
|
[@option{-b} @var{bfdname}|@option{--target=}@var{bfdname}]
|
|
[@option{-C}|@option{--demangle}[=@var{style}]]
|
|
[@option{-e} @var{filename}|@option{--exe=}@var{filename}]
|
|
[@option{-f}|@option{--functions}] [@option{-s}|@option{--basename}]
|
|
[@option{-i}|@option{--inlines}]
|
|
[@option{-p}|@option{--pretty-print}]
|
|
[@option{-j}|@option{--section=}@var{name}]
|
|
[@option{-H}|@option{--help}] [@option{-V}|@option{--version}]
|
|
[addr addr @dots{}]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION addr2line
|
|
|
|
@command{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 @option{-e}
|
|
option. The default is the file @file{a.out}. The section in the relocatable
|
|
object to use is specified with the @option{-j} option.
|
|
|
|
@command{addr2line} has two modes of operation.
|
|
|
|
In the first, hexadecimal addresses are specified on the command line,
|
|
and @command{addr2line} displays the file name and line number for each
|
|
address.
|
|
|
|
In the second, @command{addr2line} reads hexadecimal addresses from
|
|
standard input, and prints the file name and line number for each
|
|
address on standard output. In this mode, @command{addr2line} may be used
|
|
in a pipe to convert dynamically chosen addresses.
|
|
|
|
The format of the output is @samp{FILENAME:LINENO}. The file name and
|
|
line number for each input address is printed on separate lines.
|
|
|
|
If the @option{-f} option is used, then each @samp{FILENAME:LINENO}
|
|
line is preceded by @samp{FUNCTIONNAME} which is the name of the
|
|
function containing the address.
|
|
|
|
If the @option{-i} option is used and the code at the given address is
|
|
present there because of inlining by the compiler then the
|
|
@samp{@{FUNCTIONNAME@} FILENAME:LINENO} information for the inlining
|
|
function will be displayed afterwards. This continues recursively
|
|
until there is no more inlining to report.
|
|
|
|
If the @option{-a} option is used then the output is prefixed by the
|
|
input address.
|
|
|
|
If the @option{-p} option is used then the output for each input
|
|
address is displayed on one, possibly quite long, line. If
|
|
@option{-p} is not used then the output is broken up into multiple
|
|
lines, based on the paragraphs above.
|
|
|
|
If the file name or function name can not be determined,
|
|
@command{addr2line} will print two question marks in their place. If the
|
|
line number can not be determined, @command{addr2line} will print 0.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS addr2line
|
|
|
|
The long and short forms of options, shown here as alternatives, are
|
|
equivalent.
|
|
|
|
@table @env
|
|
@item -a
|
|
@itemx --addresses
|
|
Display the address before the function name, file and line number
|
|
information. The address is printed with a @samp{0x} prefix to easily
|
|
identify it.
|
|
|
|
@item -b @var{bfdname}
|
|
@itemx --target=@var{bfdname}
|
|
@cindex object code format
|
|
Specify that the object-code format for the object files is
|
|
@var{bfdname}.
|
|
|
|
@item -C
|
|
@itemx --demangle[=@var{style}]
|
|
@cindex demangling in objdump
|
|
Decode (@dfn{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. @xref{c++filt},
|
|
for more information on demangling.
|
|
|
|
@item -e @var{filename}
|
|
@itemx --exe=@var{filename}
|
|
Specify the name of the executable for which addresses should be
|
|
translated. The default file is @file{a.out}.
|
|
|
|
@item -f
|
|
@itemx --functions
|
|
Display function names as well as file and line number information.
|
|
|
|
@item -s
|
|
@itemx --basenames
|
|
Display only the base of each file name.
|
|
|
|
@item -i
|
|
@itemx --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 @code{main} inlines
|
|
@code{callee1} which inlines @code{callee2}, and address is from
|
|
@code{callee2}, the source information for @code{callee1} and @code{main}
|
|
will also be printed.
|
|
|
|
@item -j
|
|
@itemx --section
|
|
Read offsets relative to the specified section instead of absolute addresses.
|
|
|
|
@item -p
|
|
@itemx --pretty-print
|
|
Make the output more human friendly: each location are printed on one line.
|
|
If option @option{-i} is specified, lines for all enclosing scopes are
|
|
prefixed with @samp{(inlined by)}.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO addr2line
|
|
Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node nlmconv
|
|
@chapter nlmconv
|
|
|
|
@command{nlmconv} converts a relocatable object file into a NetWare
|
|
Loadable Module.
|
|
|
|
@ignore
|
|
@command{nlmconv} currently works with @samp{i386} object
|
|
files in @code{coff}, @sc{elf}, or @code{a.out} format, and @sc{SPARC}
|
|
object files in @sc{elf}, or @code{a.out} format@footnote{
|
|
@command{nlmconv} should work with any @samp{i386} or @sc{sparc} object
|
|
format in the Binary File Descriptor library. It has only been tested
|
|
with the above formats.}.
|
|
@end ignore
|
|
|
|
@quotation
|
|
@emph{Warning:} @command{nlmconv} is not always built as part of the binary
|
|
utilities, since it is only useful for NLM targets.
|
|
@end quotation
|
|
|
|
@c man title nlmconv converts object code into an NLM.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS nlmconv
|
|
nlmconv [@option{-I} @var{bfdname}|@option{--input-target=}@var{bfdname}]
|
|
[@option{-O} @var{bfdname}|@option{--output-target=}@var{bfdname}]
|
|
[@option{-T} @var{headerfile}|@option{--header-file=}@var{headerfile}]
|
|
[@option{-d}|@option{--debug}] [@option{-l} @var{linker}|@option{--linker=}@var{linker}]
|
|
[@option{-h}|@option{--help}] [@option{-V}|@option{--version}]
|
|
@var{infile} @var{outfile}
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION nlmconv
|
|
|
|
@command{nlmconv} converts the relocatable @samp{i386} object file
|
|
@var{infile} into the NetWare Loadable Module @var{outfile}, optionally
|
|
reading @var{headerfile} for NLM header information. For instructions
|
|
on writing the NLM command file language used in header files, see the
|
|
@samp{linkers} section, @samp{NLMLINK} in particular, of the @cite{NLM
|
|
Development and Tools Overview}, which is part of the NLM Software
|
|
Developer's Kit (``NLM SDK''), available from Novell, Inc.
|
|
@command{nlmconv} uses the @sc{gnu} Binary File Descriptor library to read
|
|
@var{infile};
|
|
@ifclear man
|
|
see @ref{BFD,,BFD,ld.info,Using LD}, for more information.
|
|
@end ifclear
|
|
|
|
@command{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, @command{nlmconv} calls the linker for you.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS nlmconv
|
|
|
|
@table @env
|
|
@item -I @var{bfdname}
|
|
@itemx --input-target=@var{bfdname}
|
|
Object format of the input file. @command{nlmconv} can usually determine
|
|
the format of a given file (so no default is necessary).
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -O @var{bfdname}
|
|
@itemx --output-target=@var{bfdname}
|
|
Object format of the output file. @command{nlmconv} infers the output
|
|
format based on the input format, e.g. for a @samp{i386} input file the
|
|
output format is @samp{nlm32-i386}.
|
|
@xref{Target Selection}, for more information.
|
|
|
|
@item -T @var{headerfile}
|
|
@itemx --header-file=@var{headerfile}
|
|
Reads @var{headerfile} for NLM header information. For instructions on
|
|
writing the NLM command file language used in header files, see@ see the
|
|
@samp{linkers} section, of the @cite{NLM Development and Tools
|
|
Overview}, which is part of the NLM Software Developer's Kit, available
|
|
from Novell, Inc.
|
|
|
|
@item -d
|
|
@itemx --debug
|
|
Displays (on standard error) the linker command line used by @command{nlmconv}.
|
|
|
|
@item -l @var{linker}
|
|
@itemx --linker=@var{linker}
|
|
Use @var{linker} for any linking. @var{linker} can be an absolute or a
|
|
relative pathname.
|
|
|
|
@item -h
|
|
@itemx --help
|
|
Prints a usage summary.
|
|
|
|
@item -V
|
|
@itemx --version
|
|
Prints the version number for @command{nlmconv}.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO nlmconv
|
|
the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node windmc
|
|
@chapter windmc
|
|
|
|
@command{windmc} may be used to generator Windows message resources.
|
|
|
|
@quotation
|
|
@emph{Warning:} @command{windmc} is not always built as part of the binary
|
|
utilities, since it is only useful for Windows targets.
|
|
@end quotation
|
|
|
|
@c man title windmc generates Windows message resources.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS windmc
|
|
windmc [options] input-file
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION windmc
|
|
|
|
@command{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:
|
|
|
|
@table @code
|
|
@item h
|
|
A C header file containing the message definitions.
|
|
|
|
@item rc
|
|
A resource file compilable by the @command{windres} tool.
|
|
|
|
@item bin
|
|
One or more binary files containing the resource data for a specific
|
|
message language.
|
|
|
|
@item dbg
|
|
A C include file that maps message id's to their symbolic name.
|
|
@end table
|
|
|
|
The exact description of these different formats is available in
|
|
documentation from Microsoft.
|
|
|
|
When @command{windmc} converts from the @code{mc} format to the @code{bin}
|
|
format, @code{rc}, @code{h}, and optional @code{dbg} it is acting like the
|
|
Windows Message Compiler.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS windmc
|
|
|
|
@table @env
|
|
@item -a
|
|
@itemx --ascii_in
|
|
Specifies that the input file specified is ASCII. This is the default
|
|
behaviour.
|
|
|
|
@item -A
|
|
@itemx --ascii_out
|
|
Specifies that messages in the output @code{bin} files should be in ASCII
|
|
format.
|
|
|
|
@item -b
|
|
@itemx --binprefix
|
|
Specifies that @code{bin} filenames should have to be prefixed by the
|
|
basename of the source file.
|
|
|
|
@item -c
|
|
@itemx --customflag
|
|
Sets the customer bit in all message id's.
|
|
|
|
@item -C @var{codepage}
|
|
@itemx --codepage_in @var{codepage}
|
|
Sets the default codepage to be used to convert input file to UTF16. The
|
|
default is ocdepage 1252.
|
|
|
|
@item -d
|
|
@itemx --decimal_values
|
|
Outputs the constants in the header file in decimal. Default is using
|
|
hexadecimal output.
|
|
|
|
@item -e @var{ext}
|
|
@itemx --extension @var{ext}
|
|
The extension for the header file. The default is .h extension.
|
|
|
|
@item -F @var{target}
|
|
@itemx --target @var{target}
|
|
Specify the BFD format to use for a bin file as output. This
|
|
is a BFD target name; you can use the @option{--help} option to see a list
|
|
of supported targets. Normally @command{windmc} will use the default
|
|
format, which is the first one listed by the @option{--help} option.
|
|
@ifclear man
|
|
@ref{Target Selection}.
|
|
@end ifclear
|
|
|
|
@item -h @var{path}
|
|
@itemx --headerdir @var{path}
|
|
The target directory of the generated header file. The default is the
|
|
current directory.
|
|
|
|
@item -H
|
|
@itemx --help
|
|
Displays a list of command line options and then exits.
|
|
|
|
@item -m @var{characters}
|
|
@itemx --maxlength @var{characters}
|
|
Instructs @command{windmc} to generate a warning if the length
|
|
of any message exceeds the number specified.
|
|
|
|
@item -n
|
|
@itemx --nullterminate
|
|
Terminate message text in @code{bin} files by zero. By default they are
|
|
terminated by CR/LF.
|
|
|
|
@item -o
|
|
@itemx --hresult_use
|
|
Not yet implemented. Instructs @code{windmc} to generate an OLE2 header
|
|
file, using HRESULT definitions. Status codes are used if the flag is not
|
|
specified.
|
|
|
|
@item -O @var{codepage}
|
|
@itemx --codepage_out @var{codepage}
|
|
Sets the default codepage to be used to output text files. The default
|
|
is ocdepage 1252.
|
|
|
|
@item -r @var{path}
|
|
@itemx --rcdir @var{path}
|
|
The target directory for the generated @code{rc} script and the generated
|
|
@code{bin} files that the resource compiler script includes. The default
|
|
is the current directory.
|
|
|
|
@item -u
|
|
@itemx --unicode_in
|
|
Specifies that the input file is UTF16.
|
|
|
|
@item -U
|
|
@itemx --unicode_out
|
|
Specifies that messages in the output @code{bin} file should be in UTF16
|
|
format. This is the default behaviour.
|
|
|
|
@item -v
|
|
@item --verbose
|
|
Enable verbose mode.
|
|
|
|
@item -V
|
|
@item --version
|
|
Prints the version number for @command{windmc}.
|
|
|
|
@item -x @var{path}
|
|
@itemx --xdgb @var{path}
|
|
The path of the @code{dbg} C include file that maps message id's to the
|
|
symbolic name. No such file is generated without specifying the switch.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO windmc
|
|
the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node windres
|
|
@chapter windres
|
|
|
|
@command{windres} may be used to manipulate Windows resources.
|
|
|
|
@quotation
|
|
@emph{Warning:} @command{windres} is not always built as part of the binary
|
|
utilities, since it is only useful for Windows targets.
|
|
@end quotation
|
|
|
|
@c man title windres manipulate Windows resources.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS windres
|
|
windres [options] [input-file] [output-file]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION windres
|
|
|
|
@command{windres} reads resources from an input file and copies them into
|
|
an output file. Either file may be in one of three formats:
|
|
|
|
@table @code
|
|
@item rc
|
|
A text format read by the Resource Compiler.
|
|
|
|
@item res
|
|
A binary format generated by the Resource Compiler.
|
|
|
|
@item coff
|
|
A COFF object or executable.
|
|
@end table
|
|
|
|
The exact description of these different formats is available in
|
|
documentation from Microsoft.
|
|
|
|
When @command{windres} converts from the @code{rc} format to the @code{res}
|
|
format, it is acting like the Windows Resource Compiler. When
|
|
@command{windres} converts from the @code{res} format to the @code{coff}
|
|
format, it is acting like the Windows @code{CVTRES} program.
|
|
|
|
When @command{windres} generates an @code{rc} file, the output is similar
|
|
but not identical to the format expected for the input. When an input
|
|
@code{rc} file refers to an external filename, an output @code{rc} file
|
|
will instead include the file contents.
|
|
|
|
If the input or output format is not specified, @command{windres} will
|
|
guess based on the file name, or, for the input file, the file contents.
|
|
A file with an extension of @file{.rc} will be treated as an @code{rc}
|
|
file, a file with an extension of @file{.res} will be treated as a
|
|
@code{res} file, and a file with an extension of @file{.o} or
|
|
@file{.exe} will be treated as a @code{coff} file.
|
|
|
|
If no output file is specified, @command{windres} will print the resources
|
|
in @code{rc} format to standard output.
|
|
|
|
The normal use is for you to write an @code{rc} file, use @command{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
|
|
@code{rc} file available to Windows.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS windres
|
|
|
|
@table @env
|
|
@item -i @var{filename}
|
|
@itemx --input @var{filename}
|
|
The name of the input file. If this option is not used, then
|
|
@command{windres} will use the first non-option argument as the input file
|
|
name. If there are no non-option arguments, then @command{windres} will
|
|
read from standard input. @command{windres} can not read a COFF file from
|
|
standard input.
|
|
|
|
@item -o @var{filename}
|
|
@itemx --output @var{filename}
|
|
The name of the output file. If this option is not used, then
|
|
@command{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 @command{windres} will write to standard output.
|
|
@command{windres} can not write a COFF file to standard output. Note,
|
|
for compatibility with @command{rc} the option @option{-fo} is also
|
|
accepted, but its use is not recommended.
|
|
|
|
@item -J @var{format}
|
|
@itemx --input-format @var{format}
|
|
The input format to read. @var{format} may be @samp{res}, @samp{rc}, or
|
|
@samp{coff}. If no input format is specified, @command{windres} will
|
|
guess, as described above.
|
|
|
|
@item -O @var{format}
|
|
@itemx --output-format @var{format}
|
|
The output format to generate. @var{format} may be @samp{res},
|
|
@samp{rc}, or @samp{coff}. If no output format is specified,
|
|
@command{windres} will guess, as described above.
|
|
|
|
@item -F @var{target}
|
|
@itemx --target @var{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 @option{--help} option to see a list
|
|
of supported targets. Normally @command{windres} will use the default
|
|
format, which is the first one listed by the @option{--help} option.
|
|
@ifclear man
|
|
@ref{Target Selection}.
|
|
@end ifclear
|
|
|
|
@item --preprocessor @var{program}
|
|
When @command{windres} reads an @code{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 @code{gcc -E -xc-header -DRC_INVOKED}.
|
|
|
|
@item --preprocessor-arg @var{option}
|
|
When @command{windres} reads an @code{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.
|
|
|
|
@item -I @var{directory}
|
|
@itemx --include-dir @var{directory}
|
|
Specify an include directory to use when reading an @code{rc} file.
|
|
@command{windres} will pass this to the preprocessor as an @option{-I}
|
|
option. @command{windres} will also search this directory when looking for
|
|
files named in the @code{rc} file. If the argument passed to this command
|
|
matches any of the supported @var{formats} (as described in the @option{-J}
|
|
option), it will issue a deprecation warning, and behave just like the
|
|
@option{-J} option. New programs should not use this behaviour. If a
|
|
directory happens to match a @var{format}, simple prefix it with @samp{./}
|
|
to disable the backward compatibility.
|
|
|
|
@item -D @var{target}
|
|
@itemx --define @var{sym}[=@var{val}]
|
|
Specify a @option{-D} option to pass to the preprocessor when reading an
|
|
@code{rc} file.
|
|
|
|
@item -U @var{target}
|
|
@itemx --undefine @var{sym}
|
|
Specify a @option{-U} option to pass to the preprocessor when reading an
|
|
@code{rc} file.
|
|
|
|
@item -r
|
|
Ignored for compatibility with rc.
|
|
|
|
@item -v
|
|
Enable verbose mode. This tells you what the preprocessor is if you
|
|
didn't specify one.
|
|
|
|
@item -c @var{val}
|
|
@item --codepage @var{val}
|
|
Specify the default codepage to use when reading an @code{rc} file.
|
|
@var{val} should be a hexadecimal prefixed by @samp{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.
|
|
|
|
@item -l @var{val}
|
|
@item --language @var{val}
|
|
Specify the default language to use when reading an @code{rc} file.
|
|
@var{val} should be a hexadecimal language code. The low eight bits are
|
|
the language, and the high eight bits are the sublanguage.
|
|
|
|
@item --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).
|
|
|
|
@item --no-use-temp-file
|
|
Use popen, not a temporary file, to read the output of the preprocessor.
|
|
This is the default behaviour.
|
|
|
|
@item -h
|
|
@item --help
|
|
Prints a usage summary.
|
|
|
|
@item -V
|
|
@item --version
|
|
Prints the version number for @command{windres}.
|
|
|
|
@item --yydebug
|
|
If @command{windres} is compiled with @code{YYDEBUG} defined as @code{1},
|
|
this will turn on parser debugging.
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO windres
|
|
the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node dlltool
|
|
@chapter dlltool
|
|
@cindex DLL
|
|
@kindex dlltool
|
|
|
|
@command{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
|
|
@file{.def} file or scanning the @file{.a} and @file{.o} files which
|
|
will be in the DLL. A @file{.o} file can contain information in
|
|
special @samp{.drectve} sections with export information.
|
|
|
|
@quotation
|
|
@emph{Note:} @command{dlltool} is not always built as part of the
|
|
binary utilities, since it is only useful for those targets which
|
|
support DLLs.
|
|
@end quotation
|
|
|
|
@c man title dlltool Create files needed to build and use DLLs.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS dlltool
|
|
dlltool [@option{-d}|@option{--input-def} @var{def-file-name}]
|
|
[@option{-b}|@option{--base-file} @var{base-file-name}]
|
|
[@option{-e}|@option{--output-exp} @var{exports-file-name}]
|
|
[@option{-z}|@option{--output-def} @var{def-file-name}]
|
|
[@option{-l}|@option{--output-lib} @var{library-file-name}]
|
|
[@option{-y}|@option{--output-delaylib} @var{library-file-name}]
|
|
[@option{--export-all-symbols}] [@option{--no-export-all-symbols}]
|
|
[@option{--exclude-symbols} @var{list}]
|
|
[@option{--no-default-excludes}]
|
|
[@option{-S}|@option{--as} @var{path-to-assembler}] [@option{-f}|@option{--as-flags} @var{options}]
|
|
[@option{-D}|@option{--dllname} @var{name}] [@option{-m}|@option{--machine} @var{machine}]
|
|
[@option{-a}|@option{--add-indirect}]
|
|
[@option{-U}|@option{--add-underscore}] [@option{--add-stdcall-underscore}]
|
|
[@option{-k}|@option{--kill-at}] [@option{-A}|@option{--add-stdcall-alias}]
|
|
[@option{-p}|@option{--ext-prefix-alias} @var{prefix}]
|
|
[@option{-x}|@option{--no-idata4}] [@option{-c}|@option{--no-idata5}]
|
|
[@option{--use-nul-prefixed-import-tables}]
|
|
[@option{-I}|@option{--identify} @var{library-file-name}] [@option{--identify-strict}]
|
|
[@option{-i}|@option{--interwork}]
|
|
[@option{-n}|@option{--nodelete}] [@option{-t}|@option{--temp-prefix} @var{prefix}]
|
|
[@option{-v}|@option{--verbose}]
|
|
[@option{-h}|@option{--help}] [@option{-V}|@option{--version}]
|
|
[@option{--no-leading-underscore}] [@option{--leading-underscore}]
|
|
[object-file @dots{}]
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION dlltool
|
|
|
|
@command{dlltool} reads its inputs, which can come from the @option{-d} and
|
|
@option{-b} options as well as object files specified on the command
|
|
line. It then processes these inputs and if the @option{-e} option has
|
|
been specified it creates a exports file. If the @option{-l} option
|
|
has been specified it creates a library file and if the @option{-z} option
|
|
has been specified it creates a def file. Any or all of the @option{-e},
|
|
@option{-l} and @option{-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. @command{dlltool} can help with the creation of
|
|
these files.
|
|
|
|
The first file is a @file{.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 @command{dlltool} can be used
|
|
to create it using the @option{-z} option. In this case @command{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 @file{.def} file it creates.
|
|
|
|
In order to mark a function as being exported from a DLL, it needs to
|
|
have an @option{-export:<name_of_function>} entry in the @samp{.drectve}
|
|
section of the object file. This can be done in C by using the
|
|
asm() operator:
|
|
|
|
@smallexample
|
|
asm (".section .drectve");
|
|
asm (".ascii \"-export:my_func\"");
|
|
|
|
int my_func (void) @{ @dots{} @}
|
|
@end smallexample
|
|
|
|
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 @option{-e} option to
|
|
@command{dlltool} when it is creating or reading in a @file{.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 @option{-l} option to
|
|
dlltool when it is creating or reading in a @file{.def} file.
|
|
|
|
If the @option{-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.
|
|
|
|
@command{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 @option{-S} command line option can be
|
|
used to specify the path to the assembler that dlltool will use,
|
|
and the @option{-f} option can be used to pass specific flags to that
|
|
assembler. The @option{-n} can be used to prevent dlltool from deleting
|
|
these temporary assembler files when it is done, and if @option{-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 @samp{dll.c} and
|
|
also creating a program (from an object file called @samp{program.o})
|
|
that uses that DLL:
|
|
|
|
@smallexample
|
|
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
|
|
@end smallexample
|
|
|
|
|
|
@command{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 @option{-I} or @option{--identify} option.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS dlltool
|
|
|
|
The command line options have the following meanings:
|
|
|
|
@table @env
|
|
|
|
@item -d @var{filename}
|
|
@itemx --input-def @var{filename}
|
|
@cindex input .def file
|
|
Specifies the name of a @file{.def} file to be read in and processed.
|
|
|
|
@item -b @var{filename}
|
|
@itemx --base-file @var{filename}
|
|
@cindex base files
|
|
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.
|
|
|
|
@item -e @var{filename}
|
|
@itemx --output-exp @var{filename}
|
|
Specifies the name of the export file to be created by dlltool.
|
|
|
|
@item -z @var{filename}
|
|
@itemx --output-def @var{filename}
|
|
Specifies the name of the @file{.def} file to be created by dlltool.
|
|
|
|
@item -l @var{filename}
|
|
@itemx --output-lib @var{filename}
|
|
Specifies the name of the library file to be created by dlltool.
|
|
|
|
@item -y @var{filename}
|
|
@itemx --output-delaylib @var{filename}
|
|
Specifies the name of the delay-import library file to be created by dlltool.
|
|
|
|
@item --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 @option{--no-default-excludes}
|
|
option. You may add to the list of symbols to not export by using the
|
|
@option{--exclude-symbols} option.
|
|
|
|
@item --no-export-all-symbols
|
|
Only export symbols explicitly listed in an input @file{.def} file or in
|
|
@samp{.drectve} sections in the input object files. This is the default
|
|
behaviour. The @samp{.drectve} sections are created by @samp{dllexport}
|
|
attributes in the source code.
|
|
|
|
@item --exclude-symbols @var{list}
|
|
Do not export the symbols in @var{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
|
|
@option{--export-all-symbols} is used.
|
|
|
|
@item --no-default-excludes
|
|
When @option{--export-all-symbols} is used, it will by default avoid
|
|
exporting certain special symbols. The current list of symbols to avoid
|
|
exporting is @samp{DllMain@@12}, @samp{DllEntryPoint@@0},
|
|
@samp{impure_ptr}. You may use the @option{--no-default-excludes} option
|
|
to go ahead and export these special symbols. This is only meaningful
|
|
when @option{--export-all-symbols} is used.
|
|
|
|
@item -S @var{path}
|
|
@itemx --as @var{path}
|
|
Specifies the path, including the filename, of the assembler to be used
|
|
to create the exports file.
|
|
|
|
@item -f @var{options}
|
|
@itemx --as-flags @var{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 @option{-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.
|
|
|
|
@item -D @var{name}
|
|
@itemx --dll-name @var{name}
|
|
Specifies the name to be stored in the @file{.def} file as the name of
|
|
the DLL when the @option{-e} option is used. If this option is not
|
|
present, then the filename given to the @option{-e} option will be
|
|
used as the name of the DLL.
|
|
|
|
@item -m @var{machine}
|
|
@itemx -machine @var{machine}
|
|
Specifies the type of machine for which the library file should be
|
|
built. @command{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.
|
|
|
|
@item -a
|
|
@itemx --add-indirect
|
|
Specifies that when @command{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!
|
|
|
|
@item -U
|
|
@itemx --add-underscore
|
|
Specifies that when @command{dlltool} is creating the exports file it
|
|
should prepend an underscore to the names of @emph{all} exported symbols.
|
|
|
|
@item --no-leading-underscore
|
|
@item --leading-underscore
|
|
Specifies whether standard symbol should be forced to be prefixed, or
|
|
not.
|
|
|
|
@item --add-stdcall-underscore
|
|
Specifies that when @command{dlltool} is creating the exports file it
|
|
should prepend an underscore to the names of exported @emph{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.
|
|
|
|
@item -k
|
|
@itemx --kill-at
|
|
Specifies that when @command{dlltool} is creating the exports file it
|
|
should not append the string @samp{@@ <number>}. These numbers are
|
|
called ordinal numbers and they represent another way of accessing the
|
|
function in a DLL, other than by name.
|
|
|
|
@item -A
|
|
@itemx --add-stdcall-alias
|
|
Specifies that when @command{dlltool} is creating the exports file it
|
|
should add aliases for stdcall symbols without @samp{@@ <number>}
|
|
in addition to the symbols with @samp{@@ <number>}.
|
|
|
|
@item -p
|
|
@itemx --ext-prefix-alias @var{prefix}
|
|
Causes @command{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.
|
|
|
|
@item -x
|
|
@itemx --no-idata4
|
|
Specifies that when @command{dlltool} is creating the exports and library
|
|
files it should omit the @code{.idata4} section. This is for compatibility
|
|
with certain operating systems.
|
|
|
|
@item --use-nul-prefixed-import-tables
|
|
Specifies that when @command{dlltool} is creating the exports and library
|
|
files it should prefix the @code{.idata4} and @code{.idata5} by zero an
|
|
element. This emulates old gnu import library generation of
|
|
@code{dlltool}. By default this option is turned off.
|
|
|
|
@item -c
|
|
@itemx --no-idata5
|
|
Specifies that when @command{dlltool} is creating the exports and library
|
|
files it should omit the @code{.idata5} section. This is for compatibility
|
|
with certain operating systems.
|
|
|
|
@item -I @var{filename}
|
|
@itemx --identify @var{filename}
|
|
Specifies that @command{dlltool} should inspect the import library
|
|
indicated by @var{filename} and report, on @code{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.
|
|
@command{dlltool} fails if the import library does not exist or is not
|
|
actually an import library. See also @option{--identify-strict}.
|
|
|
|
@item --identify-strict
|
|
Modifies the behavior of the @option{--identify} option, such
|
|
that an error is reported if @var{filename} is associated with
|
|
more than one DLL.
|
|
|
|
@item -i
|
|
@itemx --interwork
|
|
Specifies that @command{dlltool} should mark the objects in the library
|
|
file and exports file that it produces as supporting interworking
|
|
between ARM and Thumb code.
|
|
|
|
@item -n
|
|
@itemx --nodelete
|
|
Makes @command{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.
|
|
|
|
@item -t @var{prefix}
|
|
@itemx --temp-prefix @var{prefix}
|
|
Makes @command{dlltool} use @var{prefix} when constructing the names of
|
|
temporary assembler and object files. By default, the temp file prefix
|
|
is generated from the pid.
|
|
|
|
@item -v
|
|
@itemx --verbose
|
|
Make dlltool describe what it is doing.
|
|
|
|
@item -h
|
|
@itemx --help
|
|
Displays a list of command line options and then exits.
|
|
|
|
@item -V
|
|
@itemx --version
|
|
Displays dlltool's version number and then exits.
|
|
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@menu
|
|
* def file format:: The format of the dlltool @file{.def} file
|
|
@end menu
|
|
|
|
@node def file format
|
|
@section The format of the @command{dlltool} @file{.def} file
|
|
|
|
A @file{.def} file contains any number of the following commands:
|
|
|
|
@table @asis
|
|
|
|
@item @code{NAME} @var{name} @code{[ ,} @var{base} @code{]}
|
|
The result is going to be named @var{name}@code{.exe}.
|
|
|
|
@item @code{LIBRARY} @var{name} @code{[ ,} @var{base} @code{]}
|
|
The result is going to be named @var{name}@code{.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).
|
|
|
|
@item @code{EXPORTS ( ( (} @var{name1} @code{[ = } @var{name2} @code{] ) | ( } @var{name1} @code{=} @var{module-name} @code{.} @var{external-name} @code{) ) [ == } @var{its_name} @code{]}
|
|
@item @code{[} @var{integer} @code{] [ NONAME ] [ CONSTANT ] [ DATA ] [ PRIVATE ] ) *}
|
|
Declares @var{name1} as an exported symbol from the DLL, with optional
|
|
ordinal number @var{integer}, or declares @var{name1} as an alias
|
|
(forward) of the function @var{external-name} in the DLL.
|
|
If @var{its_name} is specified, this name is used as string in export table.
|
|
@var{module-name}.
|
|
Note: The @code{EXPORTS} has to be the last command in .def file, as keywords
|
|
are treated - beside @code{LIBRARY} - as simple name-identifiers.
|
|
If you want to use LIBRARY as name then you need to quote it.
|
|
|
|
@item @code{IMPORTS ( (} @var{internal-name} @code{=} @var{module-name} @code{.} @var{integer} @code{) | [} @var{internal-name} @code{= ]} @var{module-name} @code{.} @var{external-name} @code{) [ == ) @var{its_name} @code{]} *}
|
|
Declares that @var{external-name} or the exported function whose
|
|
ordinal number is @var{integer} is to be imported from the file
|
|
@var{module-name}. If @var{internal-name} is specified then this is
|
|
the name that the imported function will be referred to in the body of
|
|
the DLL.
|
|
If @var{its_name} is specified, this name is used as string in import table.
|
|
Note: The @code{IMPORTS} has to be the last command in .def file, as keywords
|
|
are treated - beside @code{LIBRARY} - as simple name-identifiers.
|
|
If you want to use LIBRARY as name then you need to quote it.
|
|
|
|
@item @code{DESCRIPTION} @var{string}
|
|
Puts @var{string} into the output @file{.exp} file in the
|
|
@code{.rdata} section.
|
|
|
|
@item @code{STACKSIZE} @var{number-reserve} @code{[, } @var{number-commit} @code{]}
|
|
@item @code{HEAPSIZE} @var{number-reserve} @code{[, } @var{number-commit} @code{]}
|
|
Generates @code{--stack} or @code{--heap}
|
|
@var{number-reserve},@var{number-commit} in the output @code{.drectve}
|
|
section. The linker will see this and act upon it.
|
|
|
|
@item @code{CODE} @var{attr} @code{+}
|
|
@item @code{DATA} @var{attr} @code{+}
|
|
@item @code{SECTIONS (} @var{section-name} @var{attr}@code{ + ) *}
|
|
Generates @code{--attr} @var{section-name} @var{attr} in the output
|
|
@code{.drectve} section, where @var{attr} is one of @code{READ},
|
|
@code{WRITE}, @code{EXECUTE} or @code{SHARED}. The linker will see
|
|
this and act upon it.
|
|
|
|
@end table
|
|
|
|
@ignore
|
|
@c man begin SEEALSO dlltool
|
|
The Info pages for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node readelf
|
|
@chapter readelf
|
|
|
|
@cindex ELF file information
|
|
@kindex readelf
|
|
|
|
@c man title readelf Displays information about ELF files.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS readelf
|
|
readelf [@option{-a}|@option{--all}]
|
|
[@option{-h}|@option{--file-header}]
|
|
[@option{-l}|@option{--program-headers}|@option{--segments}]
|
|
[@option{-S}|@option{--section-headers}|@option{--sections}]
|
|
[@option{-g}|@option{--section-groups}]
|
|
[@option{-t}|@option{--section-details}]
|
|
[@option{-e}|@option{--headers}]
|
|
[@option{-s}|@option{--syms}|@option{--symbols}]
|
|
[@option{--dyn-syms}]
|
|
[@option{-n}|@option{--notes}]
|
|
[@option{-r}|@option{--relocs}]
|
|
[@option{-u}|@option{--unwind}]
|
|
[@option{-d}|@option{--dynamic}]
|
|
[@option{-V}|@option{--version-info}]
|
|
[@option{-A}|@option{--arch-specific}]
|
|
[@option{-D}|@option{--use-dynamic}]
|
|
[@option{-x} <number or name>|@option{--hex-dump=}<number or name>]
|
|
[@option{-p} <number or name>|@option{--string-dump=}<number or name>]
|
|
[@option{-R} <number or name>|@option{--relocated-dump=}<number or name>]
|
|
[@option{-c}|@option{--archive-index}]
|
|
[@option{-w[lLiaprmfFsoRt]}|
|
|
@option{--debug-dump}[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]]
|
|
[@option{--dwarf-depth=@var{n}}]
|
|
[@option{--dwarf-start=@var{n}}]
|
|
[@option{-I}|@option{--histogram}]
|
|
[@option{-v}|@option{--version}]
|
|
[@option{-W}|@option{--wide}]
|
|
[@option{-H}|@option{--help}]
|
|
@var{elffile}@dots{}
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION readelf
|
|
|
|
@command{readelf} displays information about one or more ELF format object
|
|
files. The options control what particular information to display.
|
|
|
|
@var{elffile}@dots{} 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 @command{objdump} but it
|
|
goes into more detail and it exists independently of the @sc{bfd}
|
|
library, so if there is a bug in @sc{bfd} then readelf will not be
|
|
affected.
|
|
|
|
@c man end
|
|
|
|
@c man begin OPTIONS readelf
|
|
|
|
The long and short forms of options, shown here as alternatives, are
|
|
equivalent. At least one option besides @samp{-v} or @samp{-H} must be
|
|
given.
|
|
|
|
@table @env
|
|
@item -a
|
|
@itemx --all
|
|
Equivalent to specifying @option{--file-header},
|
|
@option{--program-headers}, @option{--sections}, @option{--symbols},
|
|
@option{--relocs}, @option{--dynamic}, @option{--notes} and
|
|
@option{--version-info}.
|
|
|
|
@item -h
|
|
@itemx --file-header
|
|
@cindex ELF file header information
|
|
Displays the information contained in the ELF header at the start of the
|
|
file.
|
|
|
|
@item -l
|
|
@itemx --program-headers
|
|
@itemx --segments
|
|
@cindex ELF program header information
|
|
@cindex ELF segment information
|
|
Displays the information contained in the file's segment headers, if it
|
|
has any.
|
|
|
|
@item -S
|
|
@itemx --sections
|
|
@itemx --section-headers
|
|
@cindex ELF section information
|
|
Displays the information contained in the file's section headers, if it
|
|
has any.
|
|
|
|
@item -g
|
|
@itemx --section-groups
|
|
@cindex ELF section group information
|
|
Displays the information contained in the file's section groups, if it
|
|
has any.
|
|
|
|
@item -t
|
|
@itemx --section-details
|
|
@cindex ELF section information
|
|
Displays the detailed section information. Implies @option{-S}.
|
|
|
|
@item -s
|
|
@itemx --symbols
|
|
@itemx --syms
|
|
@cindex ELF symbol table information
|
|
Displays the entries in symbol table section of the file, if it has one.
|
|
|
|
@item --dyn-syms
|
|
@cindex ELF dynamic symbol table information
|
|
Displays the entries in dynamic symbol table section of the file, if it
|
|
has one.
|
|
|
|
@item -e
|
|
@itemx --headers
|
|
Display all the headers in the file. Equivalent to @option{-h -l -S}.
|
|
|
|
@item -n
|
|
@itemx --notes
|
|
@cindex ELF notes
|
|
Displays the contents of the NOTE segments and/or sections, if any.
|
|
|
|
@item -r
|
|
@itemx --relocs
|
|
@cindex ELF reloc information
|
|
Displays the contents of the file's relocation section, if it has one.
|
|
|
|
@item -u
|
|
@itemx --unwind
|
|
@cindex unwind information
|
|
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
|
|
(@code{.ARM.exidx} / @code{.ARM.extab}) are currently supported.
|
|
|
|
@item -d
|
|
@itemx --dynamic
|
|
@cindex ELF dynamic section information
|
|
Displays the contents of the file's dynamic section, if it has one.
|
|
|
|
@item -V
|
|
@itemx --version-info
|
|
@cindex ELF version sections information
|
|
Displays the contents of the version sections in the file, it they
|
|
exist.
|
|
|
|
@item -A
|
|
@itemx --arch-specific
|
|
Displays architecture-specific information in the file, if there
|
|
is any.
|
|
|
|
@item -D
|
|
@itemx --use-dynamic
|
|
When displaying symbols, this option makes @command{readelf} use the
|
|
symbol hash tables in the file's dynamic section, rather than the
|
|
symbol table sections.
|
|
|
|
@item -x <number or name>
|
|
@itemx --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.
|
|
|
|
@item -R <number or name>
|
|
@itemx --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.
|
|
|
|
@item -p <number or name>
|
|
@itemx --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.
|
|
|
|
@item -c
|
|
@itemx --archive-index
|
|
@cindex Archive file symbol index information
|
|
Displays the file symbol index information contained in the header part
|
|
of binary archives. Performs the same function as the @option{t}
|
|
command to @command{ar}, but without using the BFD library. @xref{ar}.
|
|
|
|
@item -w[lLiaprmfFsoRt]
|
|
@itemx --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]
|
|
Displays the contents of the debug sections in the file, if any are
|
|
present. If one of the optional letters or words follows the switch
|
|
then only data found in those specific sections will be dumped.
|
|
|
|
Note that there is no single letter option to display the content of
|
|
trace sections or .gdb_index.
|
|
|
|
Note: the @option{=decodedline} option will display the interpreted
|
|
contents of a .debug_line section whereas the @option{=rawline} option
|
|
dumps the contents in a raw format.
|
|
|
|
Note: the @option{=frames-interp} option will display the interpreted
|
|
contents of a .debug_frame section whereas the @option{=frames} option
|
|
dumps the contents in a raw format.
|
|
|
|
Note: the output from the @option{=info} option can also be affected
|
|
by the options @option{--dwarf-depth} and @option{--dwarf-start}.
|
|
|
|
@item --dwarf-depth=@var{n}
|
|
Limit the dump of the @code{.debug_info} section to @var{n} children.
|
|
This is only useful with @option{--debug-dump=info}. The default is
|
|
to print all DIEs; the special value 0 for @var{n} will also have this
|
|
effect.
|
|
|
|
With a non-zero value for @var{n}, DIEs at or deeper than @var{n}
|
|
levels will not be printed. The range for @var{n} is zero-based.
|
|
|
|
@item --dwarf-start=@var{n}
|
|
Print only DIEs beginning with the DIE numbered @var{n}. This is only
|
|
useful with @option{--debug-dump=info}.
|
|
|
|
If specified, this option will suppress printing of any header
|
|
information and all DIEs before the DIE numbered @var{n}. Only
|
|
siblings and children of the specified DIE will be printed.
|
|
|
|
This can be used in conjunction with @option{--dwarf-depth}.
|
|
|
|
@item -I
|
|
@itemx --histogram
|
|
Display a histogram of bucket list lengths when displaying the contents
|
|
of the symbol tables.
|
|
|
|
@item -v
|
|
@itemx --version
|
|
Display the version number of readelf.
|
|
|
|
@item -W
|
|
@itemx --wide
|
|
Don't break output lines to fit into 80 columns. By default
|
|
@command{readelf} breaks section header and segment listing lines for
|
|
64-bit ELF files, so that they fit into 80 columns. This option causes
|
|
@command{readelf} to print each section header resp. each segment one a
|
|
single line, which is far more readable on terminals wider than 80 columns.
|
|
|
|
@item -H
|
|
@itemx --help
|
|
Display the command line options understood by @command{readelf}.
|
|
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO readelf
|
|
objdump(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node elfedit
|
|
@chapter elfedit
|
|
|
|
@cindex Update ELF header
|
|
@kindex elfedit
|
|
|
|
@c man title elfedit Update the ELF header of ELF files.
|
|
|
|
@smallexample
|
|
@c man begin SYNOPSIS elfedit
|
|
elfedit [@option{--input-mach=}@var{machine}]
|
|
[@option{--input-type=}@var{type}]
|
|
[@option{--input-osabi=}@var{osabi}]
|
|
@option{--output-mach=}@var{machine}
|
|
@option{--output-type=}@var{type}
|
|
@option{--output-osabi=}@var{osabi}
|
|
[@option{-v}|@option{--version}]
|
|
[@option{-h}|@option{--help}]
|
|
@var{elffile}@dots{}
|
|
@c man end
|
|
@end smallexample
|
|
|
|
@c man begin DESCRIPTION elfedit
|
|
|
|
@command{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.
|
|
|
|
@var{elffile}@dots{} are the ELF files to be updated. 32-bit and
|
|
64-bit ELF files are supported, as are archives containing ELF files.
|
|
@c man end
|
|
|
|
@c man begin OPTIONS elfedit
|
|
|
|
The long and short forms of options, shown here as alternatives, are
|
|
equivalent. At least one of the @option{--output-mach},
|
|
@option{--output-type} and @option{--output-osabi} options must be given.
|
|
|
|
@table @env
|
|
|
|
@itemx --input-mach=@var{machine}
|
|
Set the matching input ELF machine type to @var{machine}. If
|
|
@option{--input-mach} isn't specified, it will match any ELF
|
|
machine types.
|
|
|
|
The supported ELF machine types are, @var{L1OM}, @var{K1OM} and
|
|
@var{x86-64}.
|
|
|
|
@itemx --output-mach=@var{machine}
|
|
Change the ELF machine type in the ELF header to @var{machine}. The
|
|
supported ELF machine types are the same as @option{--input-mach}.
|
|
|
|
@itemx --input-type=@var{type}
|
|
Set the matching input ELF file type to @var{type}. If
|
|
@option{--input-type} isn't specified, it will match any ELF file types.
|
|
|
|
The supported ELF file types are, @var{rel}, @var{exec} and @var{dyn}.
|
|
|
|
@itemx --output-type=@var{type}
|
|
Change the ELF file type in the ELF header to @var{type}. The
|
|
supported ELF types are the same as @option{--input-type}.
|
|
|
|
@itemx --input-osabi=@var{osabi}
|
|
Set the matching input ELF file OSABI to @var{osabi}. If
|
|
@option{--input-osabi} isn't specified, it will match any ELF OSABIs.
|
|
|
|
The supported ELF OSABIs are, @var{none}, @var{HPUX}, @var{NetBSD},
|
|
@var{GNU}, @var{Linux} (alias for @var{GNU}),
|
|
@var{Solaris}, @var{AIX}, @var{Irix},
|
|
@var{FreeBSD}, @var{TRU64}, @var{Modesto}, @var{OpenBSD}, @var{OpenVMS},
|
|
@var{NSK}, @var{AROS} and @var{FenixOS}.
|
|
|
|
@itemx --output-osabi=@var{osabi}
|
|
Change the ELF OSABI in the ELF header to @var{osabi}. The
|
|
supported ELF OSABI are the same as @option{--input-osabi}.
|
|
|
|
@item -v
|
|
@itemx --version
|
|
Display the version number of @command{elfedit}.
|
|
|
|
@item -h
|
|
@itemx --help
|
|
Display the command line options understood by @command{elfedit}.
|
|
|
|
@end table
|
|
|
|
@c man end
|
|
|
|
@ignore
|
|
@c man begin SEEALSO elfedit
|
|
readelf(1), and the Info entries for @file{binutils}.
|
|
@c man end
|
|
@end ignore
|
|
|
|
@node Common Options
|
|
@chapter Common Options
|
|
|
|
The following command-line options are supported by all of the
|
|
programs described in this manual.
|
|
|
|
@c man begin OPTIONS
|
|
@table @env
|
|
@include at-file.texi
|
|
@c man end
|
|
|
|
@item --help
|
|
Display the command-line options supported by the program.
|
|
|
|
@item --version
|
|
Display the version number of the program.
|
|
|
|
@c man begin OPTIONS
|
|
@end table
|
|
@c man end
|
|
|
|
@node Selecting the Target System
|
|
@chapter Selecting the Target System
|
|
|
|
You can specify two aspects of the target system to the @sc{gnu}
|
|
binary file utilities, each in several ways:
|
|
|
|
@itemize @bullet
|
|
@item
|
|
the target
|
|
|
|
@item
|
|
the architecture
|
|
@end itemize
|
|
|
|
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
|
|
@option{--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 @dfn{native} (on hosts
|
|
with the same type as the target system).
|
|
|
|
@menu
|
|
* Target Selection::
|
|
* Architecture Selection::
|
|
@end menu
|
|
|
|
@node Target Selection
|
|
@section Target Selection
|
|
|
|
A @dfn{target} is an object file format. A given target may be
|
|
supported for multiple architectures (@pxref{Architecture Selection}).
|
|
A target selection may also have variations for different operating
|
|
systems or architectures.
|
|
|
|
The command to list valid target values is @samp{objdump -i}
|
|
(the first column of output contains the relevant information).
|
|
|
|
Some sample values are: @samp{a.out-hp300bsd}, @samp{ecoff-littlemips},
|
|
@samp{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 @file{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 @file{config.sub} which is included with the
|
|
sources.
|
|
|
|
Some sample configuration triplets are: @samp{m68k-hp-bsd},
|
|
@samp{mips-dec-ultrix}, @samp{sparc-sun-sunos}.
|
|
|
|
@subheading @command{objdump} Target
|
|
|
|
Ways to specify:
|
|
|
|
@enumerate
|
|
@item
|
|
command line option: @option{-b} or @option{--target}
|
|
|
|
@item
|
|
environment variable @code{GNUTARGET}
|
|
|
|
@item
|
|
deduced from the input file
|
|
@end enumerate
|
|
|
|
@subheading @command{objcopy} and @command{strip} Input Target
|
|
|
|
Ways to specify:
|
|
|
|
@enumerate
|
|
@item
|
|
command line options: @option{-I} or @option{--input-target}, or @option{-F} or @option{--target}
|
|
|
|
@item
|
|
environment variable @code{GNUTARGET}
|
|
|
|
@item
|
|
deduced from the input file
|
|
@end enumerate
|
|
|
|
@subheading @command{objcopy} and @command{strip} Output Target
|
|
|
|
Ways to specify:
|
|
|
|
@enumerate
|
|
@item
|
|
command line options: @option{-O} or @option{--output-target}, or @option{-F} or @option{--target}
|
|
|
|
@item
|
|
the input target (see ``@command{objcopy} and @command{strip} Input Target'' above)
|
|
|
|
@item
|
|
environment variable @code{GNUTARGET}
|
|
|
|
@item
|
|
deduced from the input file
|
|
@end enumerate
|
|
|
|
@subheading @command{nm}, @command{size}, and @command{strings} Target
|
|
|
|
Ways to specify:
|
|
|
|
@enumerate
|
|
@item
|
|
command line option: @option{--target}
|
|
|
|
@item
|
|
environment variable @code{GNUTARGET}
|
|
|
|
@item
|
|
deduced from the input file
|
|
@end enumerate
|
|
|
|
@node Architecture Selection
|
|
@section Architecture Selection
|
|
|
|
An @dfn{architecture} is a type of @sc{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 @sc{cpu}.
|
|
|
|
The command to list valid architecture values is @samp{objdump -i} (the
|
|
second column contains the relevant information).
|
|
|
|
Sample values: @samp{m68k:68020}, @samp{mips:3000}, @samp{sparc}.
|
|
|
|
@subheading @command{objdump} Architecture
|
|
|
|
Ways to specify:
|
|
|
|
@enumerate
|
|
@item
|
|
command line option: @option{-m} or @option{--architecture}
|
|
|
|
@item
|
|
deduced from the input file
|
|
@end enumerate
|
|
|
|
@subheading @command{objcopy}, @command{nm}, @command{size}, @command{strings} Architecture
|
|
|
|
Ways to specify:
|
|
|
|
@enumerate
|
|
@item
|
|
deduced from the input file
|
|
@end enumerate
|
|
|
|
@node Reporting Bugs
|
|
@chapter Reporting Bugs
|
|
@cindex bugs
|
|
@cindex 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
|
|
@end menu
|
|
|
|
@node Bug Criteria
|
|
@section Have You Found a Bug?
|
|
@cindex bug criteria
|
|
|
|
If you are not sure whether you have found a bug, here are some guidelines:
|
|
|
|
@itemize @bullet
|
|
@cindex fatal signal
|
|
@cindex crash
|
|
@item
|
|
If a binary utility gets a fatal signal, for any input whatever, that is
|
|
a bug. Reliable utilities never crash.
|
|
|
|
@cindex error on valid input
|
|
@item
|
|
If a binary utility produces an error message for valid input, that is a
|
|
bug.
|
|
|
|
@item
|
|
If you are an experienced user of binary utilities, your suggestions for
|
|
improvement are welcome in any case.
|
|
@end itemize
|
|
|
|
@node Bug Reporting
|
|
@section How to Report Bugs
|
|
@cindex bug reports
|
|
@cindex bugs, reporting
|
|
|
|
A number of companies and individuals offer support for @sc{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 @file{etc/SERVICE} in the @sc{gnu} Emacs
|
|
distribution.
|
|
|
|
@ifset BUGURL
|
|
In any event, we also recommend that you send bug reports for the binary
|
|
utilities to @value{BUGURL}.
|
|
@end ifset
|
|
|
|
The fundamental principle of reporting bugs usefully is this:
|
|
@strong{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:
|
|
|
|
@itemize @bullet
|
|
@item
|
|
The version of the utility. Each utility announces it if you start it
|
|
with the @option{--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.
|
|
|
|
@item
|
|
Any patches you may have applied to the source, including any patches
|
|
made to the @code{BFD} library.
|
|
|
|
@item
|
|
The type of machine you are using, and the operating system name and
|
|
version number.
|
|
|
|
@item
|
|
What compiler (and its version) was used to compile the utilities---e.g.
|
|
``@code{gcc-2.7}''.
|
|
|
|
@item
|
|
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.
|
|
|
|
@item
|
|
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 @sc{gnu} programs
|
|
(e.g., @command{gcc}, @command{gas}, and/or the @sc{gnu} @command{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 @command{gcc}, or
|
|
whatever, was used to produce the object files. Also say how
|
|
@command{gcc}, or whatever, was configured.
|
|
|
|
@item
|
|
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.
|
|
|
|
@item
|
|
If you wish to suggest changes to the source, send us context diffs, as
|
|
generated by @command{diff} with the @option{-u}, @option{-c}, or @option{-p}
|
|
option. Always send diffs from the old file to the new file. If you
|
|
wish to discuss something in the @command{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.
|
|
@end itemize
|
|
|
|
Here are some things that are not necessary:
|
|
|
|
@itemize @bullet
|
|
@item
|
|
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 @emph{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.
|
|
|
|
@item
|
|
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.
|
|
|
|
@item
|
|
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.
|
|
@end itemize
|
|
|
|
@node GNU Free Documentation License
|
|
@appendix GNU Free Documentation License
|
|
|
|
@include fdl.texi
|
|
|
|
@node Binutils Index
|
|
@unnumbered Binutils Index
|
|
|
|
@printindex cp
|
|
|
|
@bye
|