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 "[\|" \-x\fR\ |\ \fB\-\-discard\-all\fR "\|]"
28 .RB "[\|" \-X\fR\ |\ \fB\-\-discard\-locals\fR "\|]"
29 .RB "[\|" \-b\ \fIbyte\fR\ |\ \fB\-\-byte=\fIbyte\fR "\|]"
30 .RB "[\|" \-i\ \fIinterleave\fR\ |\ \fB\-\-interleave=\fIinterleave\fR "\|]"
31 .RB "[\|" \-\-debugging "\|]"
32 .RB "[\|" \-\-gap\-fill=\fIval\fR "\|]"
33 .RB "[\|" \-\-pad\-to=\fIaddress\fR "\|]"
34 .RB "[\|" \-\-set\-start=\fIval\fR "\|]"
35 .RB "[\|" \-\-adjust\-start=\fIincr\fR "\|]"
36 .RB "[\|" \-\-adjust\-vma=\fIincr\fR "\|]"
37 .RB "[\|" \-\-adjust\-section\-vma=\fIsection{=,+,-}val\fR "\|]"
38 .RB "[\|" \-\-adjust\-warnings\fR "\|]"
39 .RB "[\|" \-\-no\-adjust\-warnings\fR "\|]"
40 .RB "[\|" \-\-set\-section\-flags=\fIsection=flags\fR "\|]"
41 .RB "[\|" \-\-add\-section=\fIsectionname=filename\fR "\|]"
42 .RB "[\|" \-\-change\-leading\-char\fR "\|]"
43 .RB "[\|" \-\-remove\-leading\-char\fR "\|]"
44 .RB "[\|" \-\-weaken\fR "\|]"
45 .RB "[\|" \-v\ |\ \-\-verbose\fR "\|]"
46 .RB "[\|" \-V\ |\ \-\-version\fR "\|]"
47 .RB "[\|" \-\-help\fR "\|]"
49 .RB "[\|" outfile\fR "\|]"
53 utility copies the contents of an object file to another.
55 uses the GNU BFD Library to read and write the object files. It can
56 write the destination object file in a format different from that of
57 the source object file. The exact behavior of
59 is controlled by command-line options.
62 creates temporary files to do its translations and deletes them
65 uses BFD to do all its translation work; it knows about all the
66 formats BFD knows about, and thus is able to recognize most formats
67 without being told explicitly.
70 can be used to generate S-records by using an output target of
76 can be used to generate a raw binary file by using an output target of
82 generates a raw binary file, it will essentially produce a memory dump
83 of the contents of the input object file. All symbols and relocation
84 information will be discarded. The memory dump will start at the
85 virtual address of the lowest section copied into the output file.
87 When generating an S-record or a raw binary file, it may be helpful to
90 to remove sections containing debugging information. In some cases
92 will be useful to remove sections which contain information which is
93 not needed by the binary file.
98 are the source and output files respectively. If you do not specify
101 creates a temporary file and destructively renames the result with the
102 name of the input file.
106 .B \-I \fIbfdname\fR, \fB\-\-input\-target=\fIbfdname
107 Consider the source file's object format to be
109 rather than attempting to deduce it.
111 .B \-O \fIbfdname\fR, \fB\-\-output\-target=\fIbfdname
112 Write the output file using the object format
115 .B \-F \fIbfdname\fR, \fB\-\-target=\fIbfdname
118 as the object format for both the input and the output file; i.e.
119 simply transfer data from source to destination with no translation.
121 .B \-R \fIsectionname\fR, \fB\-\-remove-section=\fIsectionname
122 Remove the named section from the file. This option may be given more
123 than once. Note that using this option inappropriately may make the
124 output file unusable.
126 .B \-S\fR, \fB\-\-strip\-all
127 Do not copy relocation and symbol information from the source file.
129 .B \-g\fR, \fB\-\-strip\-debug
130 Do not copy debugging symbols from the source file.
132 .B \-\-strip\-unneeded
133 Strip all symbols that are not needed for relocation processing.
135 .B \-K \fIsymbolname\fR, \fB\-\-keep\-symbol=\fIsymbolname
136 Copy only symbol \fIsymbolname\fP from the source file. This option
137 may be given more than once.
139 .B \-N \fIsymbolname\fR, \fB\-\-strip\-symbol=\fIsymbolname
140 Do not copy symbol \fIsymbolname\fP from the source file. This option
141 may be given more than once, and may be combined with strip options
142 other than \fB\-K\fR.
144 .B \-x\fR, \fB \-\-discard\-all
145 Do not copy non-global symbols from the source file.
147 .B \-X\fR, \fB\-\-discard\-locals
148 Do not copy compiler-generated local symbols. (These usually start
151 .B \-b \fIbyte\fR, \fB\-\-byte=\fIbyte
152 Keep only every \fIbyte\fPth byte of the input file (header data is
153 not affected). \fIbyte\fP can be in the range from 0 to the
154 interleave-1. This option is useful for creating files to program
155 ROMs. It is typically used with an srec output target.
157 .B \-i \fIinterleave\fR, \fB\-\-interleave=\fIinterleave
158 Only copy one out of every \fIinterleave\fP bytes. Which one to copy is
159 selected by the \fB\-b\fP or \fB\-\-byte\fP option. The default is 4.
160 The interleave is ignored if neither \fB\-b\fP nor \fB\-\-byte\fP is given.
163 Convert debugging information, if possible. This is not the default
164 because only certain debugging formats are supported, and the
165 conversion process can be time consuming.
167 .B \-\-gap\-fill=\fIval
168 Fill gaps between sections with \fIval\fP. This is done by increasing
169 the size of the section with the lower address, and filling in the extra
170 space created with \fIval\fP.
172 .B \-\-pad\-to=\fIaddress
173 Pad the output file up to the virtual address \fIaddress\fP. This is
174 done by increasing the size of the last section. The extra space is
175 filled in with the value specified by \fB\-\-gap\-fill\fP (default
178 .B \fB\-\-set\-start=\fIval
179 Set the start address of the new file to \fIval\fP. Not all object
180 file formats support setting the start address.
182 .B \fB\-\-adjust\-start=\fIincr
183 Adjust the start address by adding \fIincr\fP. Not all object file
184 formats support setting the start address.
186 .B \fB\-\-adjust\-vma=\fIincr
187 Adjust the address of all sections, as well as the start address, by
188 adding \fIincr\fP. Some object file formats do not permit section
189 addresses to be changed arbitrarily. Note that this does not relocate
190 the sections; if the program expects sections to be loaded at a
191 certain address, and this option is used to change the sections such
192 that they are loaded at a different address, the program may fail.
194 .B \fB\-\-adjust\-section\-vma=\fIsection{=,+,-}val
195 Set or adjust the address of the named \fIsection\fP. If \fI=\fP is
196 used, the section address is set to \fIval\fP. Otherwise, \fIval\fP
197 is added to or subtracted from the section address. See the comments
198 under \fB\-\-adjust\-vma\fP, above. If \fIsection\fP does not exist
199 in the input file, a warning will be issued, unless
200 \fB\-\-no\-adjust\-warnings\fP is used.
202 .B \fB\-\-adjust\-warnings
203 If \fB\-\-adjust\-section\-vma\fP is used, and the named section does
204 not exist, issue a warning. This is the default.
206 .B \fB\-\-no\-adjust\-warnings
207 Do not issue a warning if \fB\-\-adjust\-section\-vma\fP is used, even
208 if the named section does not exist.
210 .B \fB\-\-set\-section\-flags=\fIsection=flags
211 Set the flags for the named section. The \fIflags\fP argument is a
212 comma separated string of flag names. The recognized names are
213 \fIalloc\fP, \fIload\fP, \fIreadonly\fP, \fIcode\fP, \fIdata\fP, and
214 \fIrom\fP. Not all flags are meaningful for all object file
217 .B \fB\-\-add\-section=\fIsectionname=filename
218 Add a new section named \fIsectionname\fR while copying the file. The
219 contents of the new section are taken from the file \fIfilename\fR.
220 The size of the section will be the size of the file. This option
221 only works on file formats which can support sections with arbitrary
224 .B \-\-change\-leading\-char
225 Some object file formats use special characters at the start of
226 symbols. The most common such character is underscore, which compilers
227 often add before every symbol. This option tells
229 to change the leading character of every symbol when it converts
230 between object file formats. If the object file formats use the same
231 leading character, this option has no effect. Otherwise, it will add
232 a character, or remove a character, or change a character, as
235 .B \-\-remove\-leading\-char
236 If the first character of a global symbol is a special symbol leading
237 character used by the object file format, remove the character. The
238 most common symbol leading character is underscore. This option will
239 remove a leading underscore from all global symbols. This can be
240 useful if you want to link together objects of different file formats
241 with different conventions for symbol names. This is different from
242 @code{--change-leading-char} because it always changes the symbol name
243 when appropriate, regardless of the object file format of the output
246 Change all global symbols in the file to be weak.
248 .B \-v\fR, \fB\-\-verbose
249 Verbose output: list all object files modified. In the case of
250 archives, "\fBobjcopy \-V\fR" lists all members of the archive.
252 .B \-V\fR, \fB\-\-version
253 Show the version number of
258 Show a summary of the options to
262 .RB "`\|" binutils "\|'"
268 The GNU Binary Utilities\c
269 \&, Roland H. Pesch (June 1993).
272 Copyright (c) 1993, 94, 95, 96, 1997 Free Software Foundation, Inc.
274 Permission is granted to make and distribute verbatim copies of
275 this manual provided the copyright notice and this permission notice
276 are preserved on all copies.
278 Permission is granted to copy and distribute modified versions of this
279 manual under the conditions for verbatim copying, provided that the
280 entire resulting derived work is distributed under the terms of a
281 permission notice identical to this one.
283 Permission is granted to copy and distribute translations of this
284 manual into another language, under the above conditions for modified
285 versions, except that this permission notice may be included in
286 translations approved by the Free Software Foundation instead of in
287 the original English.