Add new machien types and section flags

[deliverable/binutils-gdb.git] / binutils / objcopy.1

.\" Copyright (c) 1991, 93, 94, 95, 96, 97, 98, 99, 2000 Free Software Foundation
.\" See section COPYING for conditions for redistribution
.TH objcopy 1 "05 April 2000" "Free Software Foundation" "GNU Development Tools"
.de BP
.sp
.ti \-.2i
\(**
..

.SH NAME
objcopy \- copy and translate object files

.SH SYNOPSIS
.hy 0
.na
.TP
.B objcopy
.RB "[\|" \-F\ \fIbfdname\fR\ |\ \fB\-\-target=\fIbfdname\fR "\|]" 
.RB "[\|" \-I\ \fIbfdname\fR\ |\ \fB\-\-input\-target=\fIbfdname\fR "\|]" 
.RB "[\|" \-O\ \fIbfdname\fR\ |\ \fB\-\-output\-target=\fIbfdname\fR "\|]" 
.RB "[\|" \-j\ \fIsectionname\fR\ |\ \fB\-\-only\-section=\fIsectionname\fR "\|]"
.RB "[\|" \-R\ \fIsectionname\fR\ |\ \fB\-\-remove\-section=\fIsectionname\fR "\|]"
.RB "[\|" \-S\fR\ |\ \fB\-\-strip\-all\fR "\|]" 
.RB "[\|" \-g\fR\ |\ \fB\-\-strip\-debug\fR "\|]" 
.RB "[\|" \-\-strip\-unneeded\fR "\|]" 
.RB "[\|" \-K\ \fIsymbolname\fR\ |\ \fB\-\-keep\-symbol=\fIsymbolname\fR "\|]" 
.RB "[\|" \-N\ \fIsymbolname\fR\ |\ \fB\-\-strip\-symbol=\fIsymbolname\fR "\|]" 
.RB "[\|" \-L\ \fIsymbolname\fR\ |\ \fB\-\-localize\-symbol=\fIsymbolname\fR "\|]" 
.RB "[\|" \-W\ \fIsymbolname\fR\ |\ \fB\-\-weaken\-symbol=\fIsymbolname\fR "\|]" 
.RB "[\|" \-x\fR\ |\ \fB\-\-discard\-all\fR "\|]" 
.RB "[\|" \-X\fR\ |\ \fB\-\-discard\-locals\fR "\|]" 
.RB "[\|" \-b\ \fIbyte\fR\ |\ \fB\-\-byte=\fIbyte\fR "\|]" 
.RB "[\|" \-i\ \fIinterleave\fR\ |\ \fB\-\-interleave=\fIinterleave\fR "\|]" 
.RB "[\|" \-p\fR\ |\ \fB\-\-preserve\-dates\fR "\|]" 
.RB "[\|" \-\-debugging "\|]"
.RB "[\|" \-\-gap\-fill=\fIval\fR "\|]"
.RB "[\|" \-\-pad\-to=\fIaddress\fR "\|]"
.RB "[\|" \-\-set\-start=\fIval\fR "\|]"
.RB "[\|" \-\-change\-start=\fIincr\fR "\|]"
.RB "[\|" \-\-change\-addresses=\fIincr\fR "\|]"
.RB "[\|" \-\-change\-section\-address\ \fIsection{=,+,-}val\fR "\|]"
.RB "[\|" \-\-change\-section\-lma\ \fIsection{=,+,-}val\fR "\|]"
.RB "[\|" \-\-change\-section\-vma\ \fIsection{=,+,-}val\fR "\|]"
.RB "[\|" \-\-change\-warnings\fR "\|]"
.RB "[\|" \-\-no\-change\-warnings\fR "\|]"
.RB "[\|" \-\-set\-section\-flags\ \fIsection=flags\fR "\|]"
.RB "[\|" \-\-add\-section\ \fIsectionname=filename\fR "\|]"
.RB "[\|" \-\-change\-leading\-char\fR "\|]"
.RB "[\|" \-\-remove\-leading\-char\fR "\|]"
.RB "[\|" \-\-srec\-len=\fIval\fR "\|]"
.RB "[\|" \-\-srec\-forceS3\fR "\|]"
.RB "[\|" \-\-redefine\-sym\ \fIold=new\fR "\|]"
.RB "[\|" \-\-weaken\fR "\|]"
.RB "[\|" \-v\ |\ \-\-verbose\fR "\|]" 
.RB "[\|" \-V\ |\ \-\-version\fR "\|]" 
.RB "[\|" \-\-help\fR "\|]" 
.B infile
.RB "[\|" outfile\fR "\|]" 
.SH DESCRIPTION
The GNU 
.B objcopy
utility copies the contents of an object file to another.  
.B objcopy 
uses the GNU BFD Library to read and write the object files.  It can
write the destination object file in a format different from that of
the source object file.  The exact behavior of 
.B objcopy
is controlled by command-line options.
.PP
.B objcopy
creates temporary files to do its translations and deletes them
afterward.
.B objcopy
uses BFD to do all its translation work; it knows about all the
formats BFD knows about, and thus is able to recognize most formats
without being told explicitly.
.PP
.B objcopy
can be used to generate S-records by using an output target of
.B srec
(e.g., use
.B -O srec).
.PP
.B objcopy
can be used to generate a raw binary file by using an output target of
.B binary
(e.g., use
.B -O binary).
When
.B 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
virtual address of the lowest section copied into the output file.
.PP
When generating an S-record or a raw binary file, it may be helpful to
use
.B -S
to remove sections containing debugging information.  In some cases
.B -R
will be useful to remove sections which contain information which is
not needed by the binary file.
.PP
.I infile
and
.I outfile
are the source and output files respectively.  If you do not specify
.IR outfile ,
.B objcopy
creates a temporary file and destructively renames the result with the
name of the input file.

.SH OPTIONS
.TP
.B \-I \fIbfdname\fR, \fB\-\-input\-target=\fIbfdname
Consider the source file's object format to be 
.IR bfdname ,
rather than attempting to deduce it.
.TP
.B \-O \fIbfdname\fR, \fB\-\-output\-target=\fIbfdname
Write the output file using the object format 
.IR bfdname .
.TP
.B \-F \fIbfdname\fR, \fB\-\-target=\fIbfdname
Use 
.I 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.
.TP
.B \-j \fIsectionname\fR, \fB\-\-only\-section=\fIsectionname
Copy only the named section from the input file to the output file,
discarding all other sections.  This option may be given more than
once.  Note that using this option inappropriately may make the output
file unusable.
.TP
.B \-R \fIsectionname\fR, \fB\-\-remove-section=\fIsectionname
Remove the named section from the file.  This option may be given more
than once.  Note that using this option inappropriately may make the
output file unusable.
.TP
.B \-S\fR, \fB\-\-strip\-all
Do not copy relocation and symbol information from the source file.
.TP
.B \-g\fR, \fB\-\-strip\-debug
Do not copy debugging symbols from the source file.
.TP
.B \-\-strip\-unneeded
Strip all symbols that are not needed for relocation processing.
.TP
.B \-K \fIsymbolname\fR, \fB\-\-keep\-symbol=\fIsymbolname
Copy only symbol \fIsymbolname\fP from the source file. This option
may be given more than once.
.TP
.B \-N \fIsymbolname\fR, \fB\-\-strip\-symbol=\fIsymbolname
Do not copy symbol \fIsymbolname\fP from the source file. This option
may be given more than once.
.TP
.B \-L \fIsymbolname\fR, \fB\-\-localize\-symbol=\fIsymbolname
Make symbol \fIsymbolname\fP local to the file, so that it is not
visible externally.  This option may be given more than once.
.TP
.B \-W \fIsymbolname\fR, \fB\-\-weaken\-symbol=\fIsymbolname
Make symbol \fIsymbolname\fP weak. This option may be given more than once.
.TP
.B \-x\fR, \fB\-\-discard\-all
Do not copy non-global symbols from the source file.
.TP
.B \-X\fR, \fB\-\-discard\-locals
Do not copy compiler-generated local symbols. (These usually start
with "L" or ".").
.TP
.B \-b \fIbyte\fR, \fB\-\-byte=\fIbyte
Keep only every \fIbyte\fPth byte of the input file (header data is
not affected).  \fIbyte\fP can be in the range from 0 to the
interleave-1.  This option is useful for creating files to program
ROMs.  It is typically used with an srec output target.
.TP
.B \-i \fIinterleave\fR, \fB\-\-interleave=\fIinterleave
Only copy one out of every \fIinterleave\fP bytes.  Which one to copy is
selected by the \fB\-b\fP or \fB\-\-byte\fP option.  The default is 4.
The interleave is ignored if neither \fB\-b\fP nor \fB\-\-byte\fP is given.
.TP
.B \-p\fR, \fB\-\-preserve\-dates
Set the access and modification dates of the output file to be the same
as those of the input file.
.TP
.B \-\-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.
.TP
.B \-\-gap\-fill=\fIval
Fill gaps between sections with \fIval\fP.  This operation applies to
the \fIload address\fP (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 \fIval\fP.
.TP
.B \-\-pad\-to=\fIaddress
Pad the output file up to the load address \fIaddress\fP.  This is
done by increasing the size of the last section.  The extra space is
filled in with the value specified by \fB\-\-gap\-fill\fP (default
zero).
.TP
.B \fB\-\-set\-start=\fIval
Set the start address of the new file to \fIval\fP.  Not all object
file formats support setting the start address.
.TP
.B \fB\-\-change\-start=\fIincr\fR, \fB\-\-adjust\-start=\fIincr
Changes the start address by adding \fIincr\fP.  Not all object file
formats support setting the start address.
.TP
.B \fB\-\-change\-addresses=\fIincr\fR, \fB\-\-adjust\-vma=\fIincr
Changes the address of all sections, as well as the start address, by
adding \fIincr\fP.  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.
.TP
.B \fB\-\-change\-section\-address\ \fIsection{=,+,-}val\fR, \fB\-\-adjust\-section\-vma\ \fIsection{=,+,-}val
Set or changes the VMA and LMA addresses of the named \fIsection\fP.
If \fI=\fP is used, the section address is set to \fIval\fP.
Otherwise, \fIval\fP is added to or subtracted from the section
address.  See the comments under \fB\-\-change\-addresses\fP, above.  If
\fIsection\fP does not exist in the input file, a warning will be
issued, unless \fB\-\-no\-change\-warnings\fP is used.
.TP
.B \fB\-\-change\-section\-lma\ \fIsection{=,+,-}val
Set or change the LMA address of the named \fIsection\fP.  If \fI=\fP is
used, the section address is set to \fIval\fP.  Otherwise, \fIval\fP
is added to or subtracted from the section address.  See the comments
under \fB\-\-change\-addresses\fP, above.  If \fIsection\fP does not exist
in the input file, a warning will be issued, unless
\fB\-\-no\-change\-warnings\fP is used.
.TP
.B \fB\-\-change\-section\-vma\ \fIsection{=,+,-}val
Set or change the VMA address of the named \fIsection\fP.  If \fI=\fP is
used, the section address is set to \fIval\fP.  Otherwise, \fIval\fP
is added to or subtracted from the section address.  See the comments
under \fB\-\-change\-addresses\fP, above.  If \fIsection\fP does not exist
in the input file, a warning will be issued, unless
\fB\-\-no\-change\-warnings\fP is used.
.TP
.B \fB\-\-change\-warnings\fR, \fB\-\-adjust\-warnings
If \fB\-\-change\-section\-XXX\fP is used, and the named section does
not exist, issue a warning.  This is the default.
.TP
.B \fB\-\-no\-change\-warnings\fR, \fB\-\-no\-adjust\-warnings
Do not issue a warning if \fB\-\-change\-section\-XXX\fP is used, even
if the named section does not exist.
.TP
.B \fB\-\-set\-section\-flags\ \fIsection=flags
Set the flags for the named section.  The \fIflags\fP argument is a
comma separated string of flag names.  The recognized names are
\fIalloc\fP, \fIcontents\fP, \fIload\fP, \fInoload\fP, \fIreadonly\fP,
\fIcode\fP, \fIdata\fP, \fIrom\fP, \fIshare\fP, and \fIdebug\fP.  Not
all flags are meaningful for all object file formats.
.TP
.B \fB\-\-add\-section\ \fIsectionname=filename
Add a new section named \fIsectionname\fR while copying the file.  The
contents of the new section are taken from the file \fIfilename\fR.
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.
.TP
.B \-\-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 
.B 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.
.TP
.B \-\-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
\fB\-\-change\-leading\-char\fP because it always changes the symbol name
when appropriate, regardless of the object file format of the output
.TP
.B \fB\-\-srec\-len=\fIval
Meaningful only for srec output.  Set the length of the Srecords to \fIval\fP.
This length covers both the address, data and crc fields.
.TP
.B \fB\-\-srec\-forceS3
Meaningful only for srec output.  Avoid generation of S1/S2 records, creating
S3-only record format.
.TP
.B \-\-redefine\-sym\ \fIold=new
Change the name of symbol \fIold\fR to \fInew\fR.  This can be useful
when one is trying link two things together for which you have no
source, and there are name collisions.
.TP
.B \-\-weaken
Change all global symbols in the file to be weak.
.TP
.B \-v\fR, \fB\-\-verbose
Verbose output: list all object files modified.  In the case of
archives, "\fBobjcopy \-V\fR" lists all members of the archive.
.TP
.B \-V\fR, \fB\-\-version
Show the version number of
.B objcopy
and exit.
.TP
.B \-\-help
Show a summary of the options to
.B objcopy
and exit.
.SH "SEE ALSO"
.RB "`\|" binutils "\|'" 
entry in 
.B
info\c
\&; 
.I
The GNU Binary Utilities\c
\&, Roland H. Pesch (June 1993).

.SH COPYING
Copyright (c) 1993, 94, 95, 96, 97, 98, 1999, 2000 Free Software Foundation, Inc.
.PP
This document is distributed under the terms of the GNU Free
Documenation License.  That license is described in the GNU Free
Documentation License section.

.SH GNU Free Documentation License
  Version 1.1, March 2000

  Copyright (C) 2000  Free Software Foundation, Inc.
  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     
  Everyone is permitted to copy and distribute verbatim
  copies of this license document, but changing it is
  not allowed.
.PP
0. PREAMBLE
.PP
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modifying it, either commercially or noncommercially.  Secondarily,
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.PP
This License is a kind of "copyleft", which means that derivative
works of the document must themselves be free in the same sense.  It
complements the GNU General Public License, which is a copyleft
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.PP
We have designed this License in order to use it for manuals for free
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.PP
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.PP
This License applies to any manual or other work that contains a
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.PP
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.PP
You may copy and distribute the Document in any medium, either
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.PP
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.PP
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.PP
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.PP
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.PP
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.PP
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.PP
N. Do not retitle any existing section as "Endorsements"
or to conflict in title with any Invariant Section.
.PP
If the Modified Version includes new front-matter sections or
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.PP
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.PP
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permission from the previous publisher that added the old one.
.PP
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give permission to use their names for publicity for or to assert or
imply endorsement of any Modified Version.
.PP

5. COMBINING DOCUMENTS
.PP
You may combine the Document with other documents released under this
License, under the terms defined in section 4 above for modified
versions, provided that you include in the combination all of the
Invariant Sections of all of the original documents, unmodified, and
list them all as Invariant Sections of your combined work in its
license notice.
.PP
The combined work need only contain one copy of this License, and
multiple identical Invariant Sections may be replaced with a single
copy.  If there are multiple Invariant Sections with the same name but
different contents, make the title of each such section unique by
adding at the end of it, in parentheses, the name of the original
author or publisher of that section if known, or else a unique number.
Make the same adjustment to the section titles in the list of
Invariant Sections in the license notice of the combined work.
.PP
In the combination, you must combine any sections entitled "History"
in the various original documents, forming one section entitled
"History"; likewise combine any sections entitled "Acknowledgements",
and any sections entitled "Dedications".  You must delete all sections
entitled "Endorsements."
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6. COLLECTIONS OF DOCUMENTS
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You may make a collection consisting of the Document and other documents
released under this License, and replace the individual copies of this
License in the various documents with a single copy that is included in
the collection, provided that you follow the rules of this License for
verbatim copying of each of the documents in all other respects.
.PP
You may extract a single document from such a collection, and distribute
it individually under this License, provided you insert a copy of this
License into the extracted document, and follow this License in all
other respects regarding verbatim copying of that document.
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7. AGGREGATION WITH INDEPENDENT WORKS
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A compilation of the Document or its derivatives with other separate
and independent documents or works, in or on a volume of a storage or
distribution medium, does not as a whole count as a Modified Version
of the Document, provided no compilation copyright is claimed for the
compilation.  Such a compilation is called an "aggregate", and this
License does not apply to the other self-contained works thus compiled
with the Document, on account of their being thus compiled, if they
are not themselves derivative works of the Document.
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If the Cover Text requirement of section 3 is applicable to these
copies of the Document, then if the Document is less than one quarter
of the entire aggregate, the Document's Cover Texts may be placed on
covers that surround only the Document within the aggregate.
Otherwise they must appear on covers around the whole aggregate.
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8. TRANSLATION
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Translation is considered a kind of modification, so you may
distribute translations of the Document under the terms of section 4.
Replacing Invariant Sections with translations requires special
permission from their copyright holders, but you may include
translations of some or all Invariant Sections in addition to the
original versions of these Invariant Sections.  You may include a
translation of this License provided that you also include the
original English version of this License.  In case of a disagreement
between the translation and the original English version of this
License, the original English version will prevail.
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9. TERMINATION
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You may not copy, modify, sublicense, or distribute the Document except
as expressly provided for under this License.  Any other attempt to
copy, modify, sublicense or distribute the Document is void, and will
automatically terminate your rights under this License.  However,
parties who have received copies, or rights, from you under this
License will not have their licenses terminated so long as such
parties remain in full compliance.
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10. FUTURE REVISIONS OF THIS LICENSE
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The Free Software Foundation may publish new, revised versions
of the GNU Free Documentation License from time to time.  Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.  See
http://www.gnu.org/copyleft/.
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Each version of the License is given a distinguishing version number.
If the Document specifies that a particular numbered version of this
License "or any later version" applies to it, you have the option of
following the terms and conditions either of that specified version or
of any later version that has been published (not as a draft) by the
Free Software Foundation.  If the Document does not specify a version
number of this License, you may choose any version ever published (not
as a draft) by the Free Software Foundation.
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ADDENDUM: How to use this License for your documents
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To use this License in a document you have written, include a copy of
the License in the document and put the following copyright and
license notices just after the title page:
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    Copyright (c)  YEAR  YOUR NAME.
    Permission is granted to copy, distribute and/or
    modify this document under the terms of the GNU
    Free Documentation License, Version 1.1 or any later
    version published by the Free Software Foundation;
    with the Invariant Sections being LIST THEIR TITLES,
    with the Front-Cover Texts being LIST, and with the
    Back-Cover Texts being LIST.  A copy of the license
    is included in the section entitled "GNU Free
    Documentation License".
.PP
If you have no Invariant Sections, write "with no Invariant Sections"
instead of saying which ones are invariant.  If you have no
Front-Cover Texts, write "no Front-Cover Texts" instead of
"Front-Cover Texts being LIST"; likewise for Back-Cover Texts.
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If your document contains nontrivial examples of program code, we
recommend releasing these examples in parallel under your choice of
free software license, such as the GNU General Public License,
to permit their use in free software.