1 .\" Copyright (c) 1991, 93, 94, 95, 96, 1997 Free Software Foundation
2 .\" See section COPYING for conditions for redistribution
3 .TH objcopy 1 "October 1994" "cygnus support" "GNU Development Tools"
11 objcopy \- copy and translate object files
18 .RB "[\|" \-F\ \fIbfdname\fR\ |\ \fB\-\-target=\fIbfdname\fR "\|]"
19 .RB "[\|" \-I\ \fIbfdname\fR\ |\ \fB\-\-input\-target=\fIbfdname\fR "\|]"
20 .RB "[\|" \-O\ \fIbfdname\fR\ |\ \fB\-\-output\-target=\fIbfdname\fR "\|]"
21 .RB "[\|" \-R\ \fIsectionname\fR\ |\ \fB\-\-remove\-section=\fIsectionname\fR "\|]"
22 .RB "[\|" \-S\fR\ |\ \fB\-\-strip\-all\fR "\|]"
23 .RB "[\|" \-g\fR\ |\ \fB\-\-strip\-debug\fR "\|]"
24 .RB "[\|" \-\-strip\-unneeded\fR "\|]"
25 .RB "[\|" \-K\ \fIsymbolname\fR\ |\ \fB\-\-keep\-symbol=\fIsymbolname\fR "\|]"
26 .RB "[\|" \-N\ \fIsymbolname\fR\ |\ \fB\-\-strip\-symbol=\fIsymbolname\fR "\|]"
27 .RB "[\|" \-L\ \fIsymbolname\fR\ |\ \fB\-\-localize\-symbol=\fIsymbolname\fR "\|]"
28 .RB "[\|" \-W\ \fIsymbolname\fR\ |\ \fB\-\-weaken\-symbol=\fIsymbolname\fR "\|]"
29 .RB "[\|" \-x\fR\ |\ \fB\-\-discard\-all\fR "\|]"
30 .RB "[\|" \-X\fR\ |\ \fB\-\-discard\-locals\fR "\|]"
31 .RB "[\|" \-b\ \fIbyte\fR\ |\ \fB\-\-byte=\fIbyte\fR "\|]"
32 .RB "[\|" \-i\ \fIinterleave\fR\ |\ \fB\-\-interleave=\fIinterleave\fR "\|]"
33 .RB "[\|" \-p\fR\ |\ \fB\-\-preserve\-dates\fR "\|]"
34 .RB "[\|" \-\-debugging "\|]"
35 .RB "[\|" \-\-gap\-fill=\fIval\fR "\|]"
36 .RB "[\|" \-\-pad\-to=\fIaddress\fR "\|]"
37 .RB "[\|" \-\-set\-start=\fIval\fR "\|]"
38 .RB "[\|" \-\-adjust\-start=\fIincr\fR "\|]"
39 .RB "[\|" \-\-adjust\-vma=\fIincr\fR "\|]"
40 .RB "[\|" \-\-adjust\-section\-vma=\fIsection{=,+,-}val\fR "\|]"
41 .RB "[\|" \-\-adjust\-warnings\fR "\|]"
42 .RB "[\|" \-\-no\-adjust\-warnings\fR "\|]"
43 .RB "[\|" \-\-set\-section\-flags=\fIsection=flags\fR "\|]"
44 .RB "[\|" \-\-add\-section=\fIsectionname=filename\fR "\|]"
45 .RB "[\|" \-\-change\-leading\-char\fR "\|]"
46 .RB "[\|" \-\-remove\-leading\-char\fR "\|]"
47 .RB "[\|" \-\-weaken\fR "\|]"
48 .RB "[\|" \-v\ |\ \-\-verbose\fR "\|]"
49 .RB "[\|" \-V\ |\ \-\-version\fR "\|]"
50 .RB "[\|" \-\-help\fR "\|]"
52 .RB "[\|" outfile\fR "\|]"
56 utility copies the contents of an object file to another.
58 uses the GNU BFD Library to read and write the object files. It can
59 write the destination object file in a format different from that of
60 the source object file. The exact behavior of
62 is controlled by command-line options.
65 creates temporary files to do its translations and deletes them
68 uses BFD to do all its translation work; it knows about all the
69 formats BFD knows about, and thus is able to recognize most formats
70 without being told explicitly.
73 can be used to generate S-records by using an output target of
79 can be used to generate a raw binary file by using an output target of
85 generates a raw binary file, it will essentially produce a memory dump
86 of the contents of the input object file. All symbols and relocation
87 information will be discarded. The memory dump will start at the
88 virtual address of the lowest section copied into the output file.
90 When generating an S-record or a raw binary file, it may be helpful to
93 to remove sections containing debugging information. In some cases
95 will be useful to remove sections which contain information which is
96 not needed by the binary file.
101 are the source and output files respectively. If you do not specify
104 creates a temporary file and destructively renames the result with the
105 name of the input file.
109 .B \-I \fIbfdname\fR, \fB\-\-input\-target=\fIbfdname
110 Consider the source file's object format to be
112 rather than attempting to deduce it.
114 .B \-O \fIbfdname\fR, \fB\-\-output\-target=\fIbfdname
115 Write the output file using the object format
118 .B \-F \fIbfdname\fR, \fB\-\-target=\fIbfdname
121 as the object format for both the input and the output file; i.e.
122 simply transfer data from source to destination with no translation.
124 .B \-R \fIsectionname\fR, \fB\-\-remove-section=\fIsectionname
125 Remove the named section from the file. This option may be given more
126 than once. Note that using this option inappropriately may make the
127 output file unusable.
129 .B \-S\fR, \fB\-\-strip\-all
130 Do not copy relocation and symbol information from the source file.
132 .B \-g\fR, \fB\-\-strip\-debug
133 Do not copy debugging symbols from the source file.
135 .B \-\-strip\-unneeded
136 Strip all symbols that are not needed for relocation processing.
138 .B \-K \fIsymbolname\fR, \fB\-\-keep\-symbol=\fIsymbolname
139 Copy only symbol \fIsymbolname\fP from the source file. This option
140 may be given more than once.
142 .B \-N \fIsymbolname\fR, \fB\-\-strip\-symbol=\fIsymbolname
143 Do not copy symbol \fIsymbolname\fP from the source file. This option
144 may be given more than once.
146 .B \-L \fIsymbolname\fR, \fB\-\-localize\-symbol=\fIsymbolname
147 Make symbol \fIsymbolname\fP local to the file, so that it is not
148 visible externally. This option may be given more than once.
150 .B \-W \fIsymbolname\fR, \fB\-\-weaken\-symbol=\fIsymbolname
151 Make symbol \fIsymbolname\fP weak. This option may be given more than once.
153 .B \-x\fR, \fB \-\-discard\-all
154 Do not copy non-global symbols from the source file.
156 .B \-X\fR, \fB\-\-discard\-locals
157 Do not copy compiler-generated local symbols. (These usually start
160 .B \-b \fIbyte\fR, \fB\-\-byte=\fIbyte
161 Keep only every \fIbyte\fPth byte of the input file (header data is
162 not affected). \fIbyte\fP can be in the range from 0 to the
163 interleave-1. This option is useful for creating files to program
164 ROMs. It is typically used with an srec output target.
166 .B \-i \fIinterleave\fR, \fB\-\-interleave=\fIinterleave
167 Only copy one out of every \fIinterleave\fP bytes. Which one to copy is
168 selected by the \fB\-b\fP or \fB\-\-byte\fP option. The default is 4.
169 The interleave is ignored if neither \fB\-b\fP nor \fB\-\-byte\fP is given.
171 .B \-p\fR, \fB\-\-preserve\-dates
172 Set the access and modification dates of the output file to be the same
173 as those of the input file.
176 Convert debugging information, if possible. This is not the default
177 because only certain debugging formats are supported, and the
178 conversion process can be time consuming.
180 .B \-\-gap\-fill=\fIval
181 Fill gaps between sections with \fIval\fP. This is done by increasing
182 the size of the section with the lower address, and filling in the extra
183 space created with \fIval\fP.
185 .B \-\-pad\-to=\fIaddress
186 Pad the output file up to the virtual address \fIaddress\fP. This is
187 done by increasing the size of the last section. The extra space is
188 filled in with the value specified by \fB\-\-gap\-fill\fP (default
191 .B \fB\-\-set\-start=\fIval
192 Set the start address of the new file to \fIval\fP. Not all object
193 file formats support setting the start address.
195 .B \fB\-\-adjust\-start=\fIincr
196 Adjust the start address by adding \fIincr\fP. Not all object file
197 formats support setting the start address.
199 .B \fB\-\-adjust\-vma=\fIincr
200 Adjust the address of all sections, as well as the start address, by
201 adding \fIincr\fP. Some object file formats do not permit section
202 addresses to be changed arbitrarily. Note that this does not relocate
203 the sections; if the program expects sections to be loaded at a
204 certain address, and this option is used to change the sections such
205 that they are loaded at a different address, the program may fail.
207 .B \fB\-\-adjust\-section\-vma=\fIsection{=,+,-}val
208 Set or adjust the address of the named \fIsection\fP. If \fI=\fP is
209 used, the section address is set to \fIval\fP. Otherwise, \fIval\fP
210 is added to or subtracted from the section address. See the comments
211 under \fB\-\-adjust\-vma\fP, above. If \fIsection\fP does not exist
212 in the input file, a warning will be issued, unless
213 \fB\-\-no\-adjust\-warnings\fP is used.
215 .B \fB\-\-adjust\-warnings
216 If \fB\-\-adjust\-section\-vma\fP is used, and the named section does
217 not exist, issue a warning. This is the default.
219 .B \fB\-\-no\-adjust\-warnings
220 Do not issue a warning if \fB\-\-adjust\-section\-vma\fP is used, even
221 if the named section does not exist.
223 .B \fB\-\-set\-section\-flags=\fIsection=flags
224 Set the flags for the named section. The \fIflags\fP argument is a
225 comma separated string of flag names. The recognized names are
226 \fIalloc\fP, \fIload\fP, \fIreadonly\fP, \fIcode\fP, \fIdata\fP, and
227 \fIrom\fP. Not all flags are meaningful for all object file
230 .B \fB\-\-add\-section=\fIsectionname=filename
231 Add a new section named \fIsectionname\fR while copying the file. The
232 contents of the new section are taken from the file \fIfilename\fR.
233 The size of the section will be the size of the file. This option
234 only works on file formats which can support sections with arbitrary
237 .B \-\-change\-leading\-char
238 Some object file formats use special characters at the start of
239 symbols. The most common such character is underscore, which compilers
240 often add before every symbol. This option tells
242 to change the leading character of every symbol when it converts
243 between object file formats. If the object file formats use the same
244 leading character, this option has no effect. Otherwise, it will add
245 a character, or remove a character, or change a character, as
248 .B \-\-remove\-leading\-char
249 If the first character of a global symbol is a special symbol leading
250 character used by the object file format, remove the character. The
251 most common symbol leading character is underscore. This option will
252 remove a leading underscore from all global symbols. This can be
253 useful if you want to link together objects of different file formats
254 with different conventions for symbol names. This is different from
255 @code{--change-leading-char} because it always changes the symbol name
256 when appropriate, regardless of the object file format of the output
259 Change all global symbols in the file to be weak.
261 .B \-v\fR, \fB\-\-verbose
262 Verbose output: list all object files modified. In the case of
263 archives, "\fBobjcopy \-V\fR" lists all members of the archive.
265 .B \-V\fR, \fB\-\-version
266 Show the version number of
271 Show a summary of the options to
275 .RB "`\|" binutils "\|'"
281 The GNU Binary Utilities\c
282 \&, Roland H. Pesch (June 1993).
285 Copyright (c) 1993, 94, 95, 96, 1997 Free Software Foundation, Inc.
287 Permission is granted to make and distribute verbatim copies of
288 this manual provided the copyright notice and this permission notice
289 are preserved on all copies.
291 Permission is granted to copy and distribute modified versions of this
292 manual under the conditions for verbatim copying, provided that the
293 entire resulting derived work is distributed under the terms of a
294 permission notice identical to this one.
296 Permission is granted to copy and distribute translations of this
297 manual into another language, under the above conditions for modified
298 versions, except that this permission notice may be included in
299 translations approved by the Free Software Foundation instead of in
300 the original English.