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1 | \input texinfo @c -*- Texinfo -*- |
2 | @setfilename binutils.info | |
e016ec1f NC |
3 | @settitle @sc{gnu} Binary Utilities |
4 | @finalout | |
5 | @synindex ky cp | |
8c2bc687 | 6 | |
dff70155 | 7 | @c man begin INCLUDE |
c428fa83 | 8 | @include bfdver.texi |
dff70155 | 9 | @c man end |
252b5132 | 10 | |
0e9517a9 | 11 | @copying |
0285c67d | 12 | @c man begin COPYRIGHT |
a043396b | 13 | Copyright @copyright{} 1991-2013 Free Software Foundation, Inc. |
252b5132 | 14 | |
0285c67d | 15 | Permission is granted to copy, distribute and/or modify this document |
793c5807 | 16 | under the terms of the GNU Free Documentation License, Version 1.3 |
0285c67d NC |
17 | or any later version published by the Free Software Foundation; |
18 | with no Invariant Sections, with no Front-Cover Texts, and with no | |
19 | Back-Cover Texts. A copy of the license is included in the | |
947ed062 | 20 | section entitled ``GNU Free Documentation License''. |
252b5132 | 21 | |
0285c67d | 22 | @c man end |
0e9517a9 | 23 | @end copying |
252b5132 | 24 | |
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25 | @dircategory Software development |
26 | @direntry | |
27 | * Binutils: (binutils). The GNU binary utilities. | |
28 | @end direntry | |
29 | ||
30 | @dircategory Individual utilities | |
31 | @direntry | |
32 | * addr2line: (binutils)addr2line. Convert addresses to file and line. | |
33 | * ar: (binutils)ar. Create, modify, and extract from archives. | |
34 | * c++filt: (binutils)c++filt. Filter to demangle encoded C++ symbols. | |
35 | * cxxfilt: (binutils)c++filt. MS-DOS name for c++filt. | |
36 | * dlltool: (binutils)dlltool. Create files needed to build and use DLLs. | |
37 | * nlmconv: (binutils)nlmconv. Converts object code into an NLM. | |
38 | * nm: (binutils)nm. List symbols from object files. | |
39 | * objcopy: (binutils)objcopy. Copy and translate object files. | |
40 | * objdump: (binutils)objdump. Display information from object files. | |
41 | * ranlib: (binutils)ranlib. Generate index to archive contents. | |
42 | * readelf: (binutils)readelf. Display the contents of ELF format files. | |
43 | * size: (binutils)size. List section sizes and total size. | |
44 | * strings: (binutils)strings. List printable strings from files. | |
45 | * strip: (binutils)strip. Discard symbols. | |
30fd33bb | 46 | * elfedit: (binutils)elfedit. Update the ELF header of ELF files. |
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47 | * windmc: (binutils)windmc. Generator for Windows message resources. |
48 | * windres: (binutils)windres. Manipulate Windows resources. | |
49 | @end direntry | |
50 | ||
252b5132 | 51 | @titlepage |
252b5132 | 52 | @title The @sc{gnu} Binary Utilities |
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53 | @ifset VERSION_PACKAGE |
54 | @subtitle @value{VERSION_PACKAGE} | |
55 | @end ifset | |
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56 | @subtitle Version @value{VERSION} |
57 | @sp 1 | |
36607f99 | 58 | @subtitle @value{UPDATED} |
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59 | @author Roland H. Pesch |
60 | @author Jeffrey M. Osier | |
61 | @author Cygnus Support | |
62 | @page | |
63 | ||
64 | @tex | |
65 | {\parskip=0pt \hfill Cygnus Support\par \hfill | |
e016ec1f | 66 | Texinfo \texinfoversion\par } |
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67 | @end tex |
68 | ||
69 | @vskip 0pt plus 1filll | |
e016ec1f | 70 | @insertcopying |
252b5132 | 71 | @end titlepage |
4ecceb71 | 72 | @contents |
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73 | |
74 | @node Top | |
75 | @top Introduction | |
76 | ||
77 | @cindex version | |
947ed062 | 78 | This brief manual contains documentation for the @sc{gnu} binary |
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79 | utilities |
80 | @ifset VERSION_PACKAGE | |
81 | @value{VERSION_PACKAGE} | |
82 | @end ifset | |
83 | version @value{VERSION}: | |
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84 | |
85 | @iftex | |
86 | @table @code | |
87 | @item ar | |
88 | Create, modify, and extract from archives | |
89 | ||
90 | @item nm | |
91 | List symbols from object files | |
92 | ||
93 | @item objcopy | |
94 | Copy and translate object files | |
95 | ||
96 | @item objdump | |
97 | Display information from object files | |
98 | ||
99 | @item ranlib | |
100 | Generate index to archive contents | |
101 | ||
102 | @item readelf | |
103 | Display the contents of ELF format files. | |
104 | ||
105 | @item size | |
106 | List file section sizes and total size | |
107 | ||
108 | @item strings | |
109 | List printable strings from files | |
110 | ||
111 | @item strip | |
112 | Discard symbols | |
113 | ||
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114 | @item elfedit |
115 | Update the ELF header of ELF files. | |
116 | ||
252b5132 | 117 | @item c++filt |
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118 | Demangle encoded C++ symbols (on MS-DOS, this program is named |
119 | @code{cxxfilt}) | |
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120 | |
121 | @item addr2line | |
122 | Convert addresses into file names and line numbers | |
123 | ||
124 | @item nlmconv | |
125 | Convert object code into a Netware Loadable Module | |
126 | ||
127 | @item windres | |
128 | Manipulate Windows resources | |
129 | ||
692ed3e7 | 130 | @item windmc |
a8685210 | 131 | Generator for Windows message resources |
692ed3e7 | 132 | |
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133 | @item dlltool |
134 | Create the files needed to build and use Dynamic Link Libraries | |
135 | @end table | |
136 | @end iftex | |
137 | ||
cf055d54 | 138 | This document is distributed under the terms of the GNU Free |
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139 | Documentation License version 1.3. A copy of the license is included |
140 | in the section entitled ``GNU Free Documentation License''. | |
cf055d54 | 141 | |
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142 | @menu |
143 | * ar:: Create, modify, and extract from archives | |
144 | * nm:: List symbols from object files | |
145 | * objcopy:: Copy and translate object files | |
146 | * objdump:: Display information from object files | |
147 | * ranlib:: Generate index to archive contents | |
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148 | * size:: List section sizes and total size |
149 | * strings:: List printable strings from files | |
150 | * strip:: Discard symbols | |
151 | * c++filt:: Filter to demangle encoded C++ symbols | |
9d51cc66 | 152 | * cxxfilt: c++filt. MS-DOS name for c++filt |
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153 | * addr2line:: Convert addresses to file and line |
154 | * nlmconv:: Converts object code into an NLM | |
692ed3e7 | 155 | * windmc:: Generator for Windows message resources |
7ca01ed9 | 156 | * windres:: Manipulate Windows resources |
252b5132 | 157 | * dlltool:: Create files needed to build and use DLLs |
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158 | * readelf:: Display the contents of ELF format files |
159 | * elfedit:: Update the ELF header of ELF files | |
07012eee | 160 | * Common Options:: Command-line options for all utilities |
fff279a7 | 161 | * Selecting the Target System:: How these utilities determine the target |
252b5132 | 162 | * Reporting Bugs:: Reporting Bugs |
cf055d54 | 163 | * GNU Free Documentation License:: GNU Free Documentation License |
fa0d8a3e | 164 | * Binutils Index:: Binutils Index |
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165 | @end menu |
166 | ||
167 | @node ar | |
168 | @chapter ar | |
169 | ||
170 | @kindex ar | |
171 | @cindex archives | |
172 | @cindex collections of files | |
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173 | |
174 | @c man title ar create, modify, and extract from archives | |
175 | ||
252b5132 | 176 | @smallexample |
b3364cb9 | 177 | ar [@option{--plugin} @var{name}] [-]@var{p}[@var{mod} [@var{relpos}] [@var{count}]] [@option{--target} @var{bfdname}] @var{archive} [@var{member}@dots{}] |
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178 | ar -M [ <mri-script ] |
179 | @end smallexample | |
180 | ||
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181 | @c man begin DESCRIPTION ar |
182 | ||
c7c55b78 | 183 | The @sc{gnu} @command{ar} program creates, modifies, and extracts from |
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184 | archives. An @dfn{archive} is a single file holding a collection of |
185 | other files in a structure that makes it possible to retrieve | |
186 | the original individual files (called @dfn{members} of the archive). | |
187 | ||
188 | The original files' contents, mode (permissions), timestamp, owner, and | |
189 | group are preserved in the archive, and can be restored on | |
c1c0eb9e | 190 | extraction. |
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191 | |
192 | @cindex name length | |
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193 | @sc{gnu} @command{ar} can maintain archives whose members have names of any |
194 | length; however, depending on how @command{ar} is configured on your | |
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195 | system, a limit on member-name length may be imposed for compatibility |
196 | with archive formats maintained with other tools. If it exists, the | |
197 | limit is often 15 characters (typical of formats related to a.out) or 16 | |
198 | characters (typical of formats related to coff). | |
199 | ||
200 | @cindex libraries | |
c7c55b78 | 201 | @command{ar} is considered a binary utility because archives of this sort |
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202 | are most often used as @dfn{libraries} holding commonly needed |
203 | subroutines. | |
204 | ||
205 | @cindex symbol index | |
c7c55b78 | 206 | @command{ar} creates an index to the symbols defined in relocatable |
252b5132 | 207 | object modules in the archive when you specify the modifier @samp{s}. |
c7c55b78 | 208 | Once created, this index is updated in the archive whenever @command{ar} |
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209 | makes a change to its contents (save for the @samp{q} update operation). |
210 | An archive with such an index speeds up linking to the library, and | |
211 | allows routines in the library to call each other without regard to | |
212 | their placement in the archive. | |
213 | ||
214 | You may use @samp{nm -s} or @samp{nm --print-armap} to list this index | |
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215 | table. If an archive lacks the table, another form of @command{ar} called |
216 | @command{ranlib} can be used to add just the table. | |
252b5132 | 217 | |
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218 | @cindex thin archives |
219 | @sc{gnu} @command{ar} can optionally create a @emph{thin} archive, | |
220 | which contains a symbol index and references to the original copies | |
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221 | of the member files of the archive. This is useful for building |
222 | libraries for use within a local build tree, where the relocatable | |
223 | objects are expected to remain available, and copying the contents of | |
224 | each object would only waste time and space. | |
225 | ||
226 | An archive can either be @emph{thin} or it can be normal. It cannot | |
227 | be both at the same time. Once an archive is created its format | |
228 | cannot be changed without first deleting it and then creating a new | |
229 | archive in its place. | |
230 | ||
231 | Thin archives are also @emph{flattened}, so that adding one thin | |
232 | archive to another thin archive does not nest it, as would happen with | |
233 | a normal archive. Instead the elements of the first archive are added | |
234 | individually to the second archive. | |
235 | ||
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236 | The paths to the elements of the archive are stored relative to the |
237 | archive itself. | |
238 | ||
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239 | @cindex compatibility, @command{ar} |
240 | @cindex @command{ar} compatibility | |
241 | @sc{gnu} @command{ar} is designed to be compatible with two different | |
252b5132 | 242 | facilities. You can control its activity using command-line options, |
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243 | like the different varieties of @command{ar} on Unix systems; or, if you |
244 | specify the single command-line option @option{-M}, you can control it | |
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245 | with a script supplied via standard input, like the MRI ``librarian'' |
246 | program. | |
247 | ||
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248 | @c man end |
249 | ||
252b5132 | 250 | @menu |
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251 | * ar cmdline:: Controlling @command{ar} on the command line |
252 | * ar scripts:: Controlling @command{ar} with a script | |
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253 | @end menu |
254 | ||
255 | @page | |
256 | @node ar cmdline | |
947ed062 | 257 | @section Controlling @command{ar} on the Command Line |
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258 | |
259 | @smallexample | |
0285c67d | 260 | @c man begin SYNOPSIS ar |
8adf5d70 | 261 | 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{}] |
0285c67d | 262 | @c man end |
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263 | @end smallexample |
264 | ||
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265 | @cindex Unix compatibility, @command{ar} |
266 | When you use @command{ar} in the Unix style, @command{ar} insists on at least two | |
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267 | arguments to execute: one keyletter specifying the @emph{operation} |
268 | (optionally accompanied by other keyletters specifying | |
269 | @emph{modifiers}), and the archive name to act on. | |
270 | ||
271 | Most operations can also accept further @var{member} arguments, | |
272 | specifying particular files to operate on. | |
273 | ||
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274 | @c man begin OPTIONS ar |
275 | ||
c7c55b78 | 276 | @sc{gnu} @command{ar} allows you to mix the operation code @var{p} and modifier |
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277 | flags @var{mod} in any order, within the first command-line argument. |
278 | ||
279 | If you wish, you may begin the first command-line argument with a | |
280 | dash. | |
281 | ||
282 | @cindex operations on archive | |
283 | The @var{p} keyletter specifies what operation to execute; it may be | |
284 | any of the following, but you must specify only one of them: | |
285 | ||
c7c55b78 | 286 | @table @samp |
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287 | @item d |
288 | @cindex deleting from archive | |
289 | @emph{Delete} modules from the archive. Specify the names of modules to | |
290 | be deleted as @var{member}@dots{}; the archive is untouched if you | |
291 | specify no files to delete. | |
292 | ||
c7c55b78 | 293 | If you specify the @samp{v} modifier, @command{ar} lists each module |
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294 | as it is deleted. |
295 | ||
296 | @item m | |
297 | @cindex moving in archive | |
298 | Use this operation to @emph{move} members in an archive. | |
299 | ||
300 | The ordering of members in an archive can make a difference in how | |
301 | programs are linked using the library, if a symbol is defined in more | |
c1c0eb9e | 302 | than one member. |
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303 | |
304 | If no modifiers are used with @code{m}, any members you name in the | |
305 | @var{member} arguments are moved to the @emph{end} of the archive; | |
306 | you can use the @samp{a}, @samp{b}, or @samp{i} modifiers to move them to a | |
307 | specified place instead. | |
308 | ||
309 | @item p | |
310 | @cindex printing from archive | |
311 | @emph{Print} the specified members of the archive, to the standard | |
312 | output file. If the @samp{v} modifier is specified, show the member | |
313 | name before copying its contents to standard output. | |
314 | ||
315 | If you specify no @var{member} arguments, all the files in the archive are | |
316 | printed. | |
317 | ||
318 | @item q | |
319 | @cindex quick append to archive | |
320 | @emph{Quick append}; Historically, add the files @var{member}@dots{} to the end of | |
321 | @var{archive}, without checking for replacement. | |
322 | ||
323 | The modifiers @samp{a}, @samp{b}, and @samp{i} do @emph{not} affect this | |
324 | operation; new members are always placed at the end of the archive. | |
325 | ||
c7c55b78 | 326 | The modifier @samp{v} makes @command{ar} list each file as it is appended. |
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327 | |
328 | Since the point of this operation is speed, the archive's symbol table | |
329 | index is not updated, even if it already existed; you can use @samp{ar s} or | |
c7c55b78 | 330 | @command{ranlib} explicitly to update the symbol table index. |
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331 | |
332 | However, too many different systems assume quick append rebuilds the | |
947ed062 | 333 | index, so @sc{gnu} @command{ar} implements @samp{q} as a synonym for @samp{r}. |
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334 | |
335 | @item r | |
336 | @cindex replacement in archive | |
337 | Insert the files @var{member}@dots{} into @var{archive} (with | |
338 | @emph{replacement}). This operation differs from @samp{q} in that any | |
339 | previously existing members are deleted if their names match those being | |
340 | added. | |
341 | ||
c7c55b78 | 342 | If one of the files named in @var{member}@dots{} does not exist, @command{ar} |
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343 | displays an error message, and leaves undisturbed any existing members |
344 | of the archive matching that name. | |
345 | ||
346 | By default, new members are added at the end of the file; but you may | |
347 | use one of the modifiers @samp{a}, @samp{b}, or @samp{i} to request | |
348 | placement relative to some existing member. | |
349 | ||
350 | The modifier @samp{v} used with this operation elicits a line of | |
351 | output for each file inserted, along with one of the letters @samp{a} or | |
352 | @samp{r} to indicate whether the file was appended (no old member | |
353 | deleted) or replaced. | |
354 | ||
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355 | @item s |
356 | @cindex ranlib | |
357 | Add an index to the archive, or update it if it already exists. Note | |
358 | this command is an exception to the rule that there can only be one | |
359 | command letter, as it is possible to use it as either a command or a | |
360 | modifier. In either case it does the same thing. | |
361 | ||
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362 | @item t |
363 | @cindex contents of archive | |
364 | Display a @emph{table} listing the contents of @var{archive}, or those | |
365 | of the files listed in @var{member}@dots{} that are present in the | |
366 | archive. Normally only the member name is shown; if you also want to | |
367 | see the modes (permissions), timestamp, owner, group, and size, you can | |
368 | request that by also specifying the @samp{v} modifier. | |
369 | ||
370 | If you do not specify a @var{member}, all files in the archive | |
371 | are listed. | |
372 | ||
373 | @cindex repeated names in archive | |
374 | @cindex name duplication in archive | |
375 | If there is more than one file with the same name (say, @samp{fie}) in | |
376 | an archive (say @samp{b.a}), @samp{ar t b.a fie} lists only the | |
377 | first instance; to see them all, you must ask for a complete | |
378 | listing---in our example, @samp{ar t b.a}. | |
379 | @c WRS only; per Gumby, this is implementation-dependent, and in a more | |
380 | @c recent case in fact works the other way. | |
381 | ||
382 | @item x | |
383 | @cindex extract from archive | |
384 | @emph{Extract} members (named @var{member}) from the archive. You can | |
385 | use the @samp{v} modifier with this operation, to request that | |
c7c55b78 | 386 | @command{ar} list each name as it extracts it. |
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387 | |
388 | If you do not specify a @var{member}, all files in the archive | |
389 | are extracted. | |
390 | ||
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391 | Files cannot be extracted from a thin archive. |
392 | ||
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393 | @item --help |
394 | Displays the list of command line options supported by @command{ar} | |
395 | and then exits. | |
396 | ||
397 | @item --version | |
398 | Displays the version information of @command{ar} and then exits. | |
399 | ||
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400 | @end table |
401 | ||
402 | A number of modifiers (@var{mod}) may immediately follow the @var{p} | |
403 | keyletter, to specify variations on an operation's behavior: | |
404 | ||
c7c55b78 | 405 | @table @samp |
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406 | @item a |
407 | @cindex relative placement in archive | |
408 | Add new files @emph{after} an existing member of the | |
409 | archive. If you use the modifier @samp{a}, the name of an existing archive | |
410 | member must be present as the @var{relpos} argument, before the | |
411 | @var{archive} specification. | |
412 | ||
413 | @item b | |
414 | Add new files @emph{before} an existing member of the | |
415 | archive. If you use the modifier @samp{b}, the name of an existing archive | |
416 | member must be present as the @var{relpos} argument, before the | |
417 | @var{archive} specification. (same as @samp{i}). | |
418 | ||
419 | @item c | |
420 | @cindex creating archives | |
421 | @emph{Create} the archive. The specified @var{archive} is always | |
422 | created if it did not exist, when you request an update. But a warning is | |
423 | issued unless you specify in advance that you expect to create it, by | |
424 | using this modifier. | |
425 | ||
36e4dce6 CD |
426 | @item D |
427 | @cindex deterministic archives | |
9cb80f72 | 428 | @kindex --enable-deterministic-archives |
36e4dce6 CD |
429 | Operate in @emph{deterministic} mode. When adding files and the archive |
430 | index use zero for UIDs, GIDs, timestamps, and use consistent file modes | |
431 | for all files. When this option is used, if @command{ar} is used with | |
432 | identical options and identical input files, multiple runs will create | |
433 | identical output files regardless of the input files' owners, groups, | |
434 | file modes, or modification times. | |
435 | ||
9cb80f72 RM |
436 | If @file{binutils} was configured with |
437 | @option{--enable-deterministic-archives}, then this mode is on by default. | |
438 | It can be disabled with the @samp{U} modifier, below. | |
439 | ||
252b5132 | 440 | @item f |
c7c55b78 | 441 | Truncate names in the archive. @sc{gnu} @command{ar} will normally permit file |
252b5132 | 442 | names of any length. This will cause it to create archives which are |
c7c55b78 | 443 | not compatible with the native @command{ar} program on some systems. If |
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444 | this is a concern, the @samp{f} modifier may be used to truncate file |
445 | names when putting them in the archive. | |
446 | ||
447 | @item i | |
448 | Insert new files @emph{before} an existing member of the | |
449 | archive. If you use the modifier @samp{i}, the name of an existing archive | |
450 | member must be present as the @var{relpos} argument, before the | |
451 | @var{archive} specification. (same as @samp{b}). | |
452 | ||
453 | @item l | |
454 | This modifier is accepted but not used. | |
455 | @c whaffor ar l modifier??? presumably compat; with | |
c1c0eb9e | 456 | @c what???---doc@@cygnus.com, 25jan91 |
252b5132 | 457 | |
3de39064 ILT |
458 | @item N |
459 | Uses the @var{count} parameter. This is used if there are multiple | |
460 | entries in the archive with the same name. Extract or delete instance | |
461 | @var{count} of the given name from the archive. | |
462 | ||
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463 | @item o |
464 | @cindex dates in archive | |
465 | Preserve the @emph{original} dates of members when extracting them. If | |
466 | you do not specify this modifier, files extracted from the archive | |
467 | are stamped with the time of extraction. | |
468 | ||
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469 | @item P |
470 | Use the full path name when matching names in the archive. @sc{gnu} | |
c7c55b78 | 471 | @command{ar} can not create an archive with a full path name (such archives |
3de39064 | 472 | are not POSIX complaint), but other archive creators can. This option |
c7c55b78 | 473 | will cause @sc{gnu} @command{ar} to match file names using a complete path |
3de39064 ILT |
474 | name, which can be convenient when extracting a single file from an |
475 | archive created by another tool. | |
476 | ||
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477 | @item s |
478 | @cindex writing archive index | |
479 | Write an object-file index into the archive, or update an existing one, | |
480 | even if no other change is made to the archive. You may use this modifier | |
481 | flag either with any operation, or alone. Running @samp{ar s} on an | |
482 | archive is equivalent to running @samp{ranlib} on it. | |
483 | ||
484 | @item S | |
485 | @cindex not writing archive index | |
486 | Do not generate an archive symbol table. This can speed up building a | |
487 | large library in several steps. The resulting archive can not be used | |
488 | with the linker. In order to build a symbol table, you must omit the | |
489 | @samp{S} modifier on the last execution of @samp{ar}, or you must run | |
490 | @samp{ranlib} on the archive. | |
491 | ||
a8da6403 NC |
492 | @item T |
493 | @cindex creating thin archive | |
494 | Make the specified @var{archive} a @emph{thin} archive. If it already | |
495 | exists and is a regular archive, the existing members must be present | |
496 | in the same directory as @var{archive}. | |
497 | ||
252b5132 RH |
498 | @item u |
499 | @cindex updating an archive | |
500 | Normally, @samp{ar r}@dots{} inserts all files | |
501 | listed into the archive. If you would like to insert @emph{only} those | |
502 | of the files you list that are newer than existing members of the same | |
503 | names, use this modifier. The @samp{u} modifier is allowed only for the | |
504 | operation @samp{r} (replace). In particular, the combination @samp{qu} is | |
505 | not allowed, since checking the timestamps would lose any speed | |
506 | advantage from the operation @samp{q}. | |
507 | ||
9cb80f72 RM |
508 | @item U |
509 | @cindex deterministic archives | |
510 | @kindex --enable-deterministic-archives | |
511 | Do @emph{not} operate in @emph{deterministic} mode. This is the inverse | |
512 | of the @samp{D} modifier, above: added files and the archive index will | |
513 | get their actual UID, GID, timestamp, and file mode values. | |
514 | ||
515 | This is the default unless @file{binutils} was configured with | |
516 | @option{--enable-deterministic-archives}. | |
517 | ||
252b5132 RH |
518 | @item v |
519 | This modifier requests the @emph{verbose} version of an operation. Many | |
520 | operations display additional information, such as filenames processed, | |
521 | when the modifier @samp{v} is appended. | |
522 | ||
523 | @item V | |
c7c55b78 | 524 | This modifier shows the version number of @command{ar}. |
252b5132 RH |
525 | @end table |
526 | ||
c7c55b78 | 527 | @command{ar} ignores an initial option spelt @samp{-X32_64}, for |
6e800839 | 528 | compatibility with AIX. The behaviour produced by this option is the |
947ed062 | 529 | default for @sc{gnu} @command{ar}. @command{ar} does not support any of the other |
c7c55b78 NC |
530 | @samp{-X} options; in particular, it does not support @option{-X32} |
531 | which is the default for AIX @command{ar}. | |
6e800839 | 532 | |
ce3c775b NC |
533 | The optional command line switch @option{--plugin} @var{name} causes |
534 | @command{ar} to load the plugin called @var{name} which adds support | |
535 | for more file formats. This option is only available if the toolchain | |
536 | has been built with plugin support enabled. | |
537 | ||
8adf5d70 NC |
538 | The optional command line switch @option{--target} @var{bfdname} |
539 | specifies that the archive members are in an object code format | |
540 | different from your system's default format. See | |
541 | @xref{Target Selection}, for more information. | |
542 | ||
0285c67d NC |
543 | @c man end |
544 | ||
545 | @ignore | |
546 | @c man begin SEEALSO ar | |
547 | nm(1), ranlib(1), and the Info entries for @file{binutils}. | |
548 | @c man end | |
549 | @end ignore | |
550 | ||
252b5132 | 551 | @node ar scripts |
947ed062 | 552 | @section Controlling @command{ar} with a Script |
252b5132 RH |
553 | |
554 | @smallexample | |
555 | ar -M [ <@var{script} ] | |
556 | @end smallexample | |
557 | ||
c7c55b78 NC |
558 | @cindex MRI compatibility, @command{ar} |
559 | @cindex scripts, @command{ar} | |
560 | If you use the single command-line option @samp{-M} with @command{ar}, you | |
252b5132 | 561 | can control its operation with a rudimentary command language. This |
c7c55b78 NC |
562 | form of @command{ar} operates interactively if standard input is coming |
563 | directly from a terminal. During interactive use, @command{ar} prompts for | |
252b5132 RH |
564 | input (the prompt is @samp{AR >}), and continues executing even after |
565 | errors. If you redirect standard input to a script file, no prompts are | |
c7c55b78 | 566 | issued, and @command{ar} abandons execution (with a nonzero exit code) |
252b5132 RH |
567 | on any error. |
568 | ||
c7c55b78 | 569 | The @command{ar} command language is @emph{not} designed to be equivalent |
252b5132 RH |
570 | to the command-line options; in fact, it provides somewhat less control |
571 | over archives. The only purpose of the command language is to ease the | |
c7c55b78 | 572 | transition to @sc{gnu} @command{ar} for developers who already have scripts |
252b5132 RH |
573 | written for the MRI ``librarian'' program. |
574 | ||
c7c55b78 | 575 | The syntax for the @command{ar} command language is straightforward: |
252b5132 RH |
576 | @itemize @bullet |
577 | @item | |
578 | commands are recognized in upper or lower case; for example, @code{LIST} | |
579 | is the same as @code{list}. In the following descriptions, commands are | |
580 | shown in upper case for clarity. | |
581 | ||
582 | @item | |
583 | a single command may appear on each line; it is the first word on the | |
584 | line. | |
585 | ||
586 | @item | |
587 | empty lines are allowed, and have no effect. | |
588 | ||
589 | @item | |
590 | comments are allowed; text after either of the characters @samp{*} | |
591 | or @samp{;} is ignored. | |
592 | ||
593 | @item | |
c7c55b78 | 594 | Whenever you use a list of names as part of the argument to an @command{ar} |
252b5132 RH |
595 | command, you can separate the individual names with either commas or |
596 | blanks. Commas are shown in the explanations below, for clarity. | |
597 | ||
598 | @item | |
599 | @samp{+} is used as a line continuation character; if @samp{+} appears | |
600 | at the end of a line, the text on the following line is considered part | |
601 | of the current command. | |
602 | @end itemize | |
603 | ||
c7c55b78 NC |
604 | Here are the commands you can use in @command{ar} scripts, or when using |
605 | @command{ar} interactively. Three of them have special significance: | |
252b5132 RH |
606 | |
607 | @code{OPEN} or @code{CREATE} specify a @dfn{current archive}, which is | |
608 | a temporary file required for most of the other commands. | |
609 | ||
610 | @code{SAVE} commits the changes so far specified by the script. Prior | |
611 | to @code{SAVE}, commands affect only the temporary copy of the current | |
612 | archive. | |
613 | ||
614 | @table @code | |
c1c0eb9e | 615 | @item ADDLIB @var{archive} |
252b5132 RH |
616 | @itemx ADDLIB @var{archive} (@var{module}, @var{module}, @dots{} @var{module}) |
617 | Add all the contents of @var{archive} (or, if specified, each named | |
618 | @var{module} from @var{archive}) to the current archive. | |
619 | ||
620 | Requires prior use of @code{OPEN} or @code{CREATE}. | |
621 | ||
622 | @item ADDMOD @var{member}, @var{member}, @dots{} @var{member} | |
623 | @c FIXME! w/Replacement?? If so, like "ar r @var{archive} @var{names}" | |
624 | @c else like "ar q..." | |
625 | Add each named @var{member} as a module in the current archive. | |
626 | ||
627 | Requires prior use of @code{OPEN} or @code{CREATE}. | |
628 | ||
629 | @item CLEAR | |
630 | Discard the contents of the current archive, canceling the effect of | |
631 | any operations since the last @code{SAVE}. May be executed (with no | |
632 | effect) even if no current archive is specified. | |
633 | ||
634 | @item CREATE @var{archive} | |
635 | Creates an archive, and makes it the current archive (required for many | |
636 | other commands). The new archive is created with a temporary name; it | |
637 | is not actually saved as @var{archive} until you use @code{SAVE}. | |
638 | You can overwrite existing archives; similarly, the contents of any | |
639 | existing file named @var{archive} will not be destroyed until @code{SAVE}. | |
640 | ||
641 | @item DELETE @var{module}, @var{module}, @dots{} @var{module} | |
642 | Delete each listed @var{module} from the current archive; equivalent to | |
643 | @samp{ar -d @var{archive} @var{module} @dots{} @var{module}}. | |
644 | ||
645 | Requires prior use of @code{OPEN} or @code{CREATE}. | |
646 | ||
647 | @item DIRECTORY @var{archive} (@var{module}, @dots{} @var{module}) | |
648 | @itemx DIRECTORY @var{archive} (@var{module}, @dots{} @var{module}) @var{outputfile} | |
649 | List each named @var{module} present in @var{archive}. The separate | |
650 | command @code{VERBOSE} specifies the form of the output: when verbose | |
651 | output is off, output is like that of @samp{ar -t @var{archive} | |
652 | @var{module}@dots{}}. When verbose output is on, the listing is like | |
653 | @samp{ar -tv @var{archive} @var{module}@dots{}}. | |
654 | ||
655 | Output normally goes to the standard output stream; however, if you | |
c7c55b78 | 656 | specify @var{outputfile} as a final argument, @command{ar} directs the |
252b5132 RH |
657 | output to that file. |
658 | ||
659 | @item END | |
c7c55b78 | 660 | Exit from @command{ar}, with a @code{0} exit code to indicate successful |
252b5132 RH |
661 | completion. This command does not save the output file; if you have |
662 | changed the current archive since the last @code{SAVE} command, those | |
663 | changes are lost. | |
664 | ||
665 | @item EXTRACT @var{module}, @var{module}, @dots{} @var{module} | |
666 | Extract each named @var{module} from the current archive, writing them | |
667 | into the current directory as separate files. Equivalent to @samp{ar -x | |
668 | @var{archive} @var{module}@dots{}}. | |
669 | ||
670 | Requires prior use of @code{OPEN} or @code{CREATE}. | |
671 | ||
672 | @ignore | |
673 | @c FIXME Tokens but no commands??? | |
674 | @item FULLDIR | |
675 | ||
676 | @item HELP | |
677 | @end ignore | |
678 | ||
679 | @item LIST | |
680 | Display full contents of the current archive, in ``verbose'' style | |
681 | regardless of the state of @code{VERBOSE}. The effect is like @samp{ar | |
c7c55b78 | 682 | tv @var{archive}}. (This single command is a @sc{gnu} @command{ar} |
252b5132 RH |
683 | enhancement, rather than present for MRI compatibility.) |
684 | ||
685 | Requires prior use of @code{OPEN} or @code{CREATE}. | |
686 | ||
687 | @item OPEN @var{archive} | |
688 | Opens an existing archive for use as the current archive (required for | |
689 | many other commands). Any changes as the result of subsequent commands | |
690 | will not actually affect @var{archive} until you next use @code{SAVE}. | |
691 | ||
692 | @item REPLACE @var{module}, @var{module}, @dots{} @var{module} | |
693 | In the current archive, replace each existing @var{module} (named in | |
694 | the @code{REPLACE} arguments) from files in the current working directory. | |
695 | To execute this command without errors, both the file, and the module in | |
c1c0eb9e | 696 | the current archive, must exist. |
252b5132 RH |
697 | |
698 | Requires prior use of @code{OPEN} or @code{CREATE}. | |
699 | ||
700 | @item VERBOSE | |
701 | Toggle an internal flag governing the output from @code{DIRECTORY}. | |
702 | When the flag is on, @code{DIRECTORY} output matches output from | |
703 | @samp{ar -tv }@dots{}. | |
704 | ||
705 | @item SAVE | |
706 | Commit your changes to the current archive, and actually save it as a | |
707 | file with the name specified in the last @code{CREATE} or @code{OPEN} | |
c1c0eb9e | 708 | command. |
252b5132 RH |
709 | |
710 | Requires prior use of @code{OPEN} or @code{CREATE}. | |
711 | ||
712 | @end table | |
713 | ||
714 | @iftex | |
715 | @node ld | |
716 | @chapter ld | |
717 | @cindex linker | |
718 | @kindex ld | |
c7c55b78 | 719 | The @sc{gnu} linker @command{ld} is now described in a separate manual. |
252b5132 RH |
720 | @xref{Top,, Overview,, Using LD: the @sc{gnu} linker}. |
721 | @end iftex | |
722 | ||
723 | @node nm | |
724 | @chapter nm | |
725 | @cindex symbols | |
726 | @kindex nm | |
727 | ||
0285c67d NC |
728 | @c man title nm list symbols from object files |
729 | ||
252b5132 | 730 | @smallexample |
0285c67d | 731 | @c man begin SYNOPSIS nm |
fa8f3997 NC |
732 | nm [@option{-A}|@option{-o}|@option{--print-file-name}] [@option{-a}|@option{--debug-syms}] |
733 | [@option{-B}|@option{--format=bsd}] [@option{-C}|@option{--demangle}[=@var{style}]] | |
734 | [@option{-D}|@option{--dynamic}] [@option{-f}@var{format}|@option{--format=}@var{format}] | |
735 | [@option{-g}|@option{--extern-only}] [@option{-h}|@option{--help}] | |
736 | [@option{-l}|@option{--line-numbers}] [@option{-n}|@option{-v}|@option{--numeric-sort}] | |
737 | [@option{-P}|@option{--portability}] [@option{-p}|@option{--no-sort}] | |
738 | [@option{-r}|@option{--reverse-sort}] [@option{-S}|@option{--print-size}] | |
739 | [@option{-s}|@option{--print-armap}] [@option{-t} @var{radix}|@option{--radix=}@var{radix}] | |
740 | [@option{-u}|@option{--undefined-only}] [@option{-V}|@option{--version}] | |
741 | [@option{-X 32_64}] [@option{--defined-only}] [@option{--no-demangle}] | |
742 | [@option{--plugin} @var{name}] [@option{--size-sort}] [@option{--special-syms}] | |
743 | [@option{--synthetic}] [@option{--target=}@var{bfdname}] | |
744 | [@var{objfile}@dots{}] | |
0285c67d | 745 | @c man end |
252b5132 RH |
746 | @end smallexample |
747 | ||
0285c67d | 748 | @c man begin DESCRIPTION nm |
c7c55b78 NC |
749 | @sc{gnu} @command{nm} lists the symbols from object files @var{objfile}@dots{}. |
750 | If no object files are listed as arguments, @command{nm} assumes the file | |
252b5132 RH |
751 | @file{a.out}. |
752 | ||
c7c55b78 | 753 | For each symbol, @command{nm} shows: |
252b5132 RH |
754 | |
755 | @itemize @bullet | |
756 | @item | |
757 | The symbol value, in the radix selected by options (see below), or | |
758 | hexadecimal by default. | |
759 | ||
760 | @item | |
761 | The symbol type. At least the following types are used; others are, as | |
762 | well, depending on the object file format. If lowercase, the symbol is | |
0ba0c2b3 NC |
763 | usually local; if uppercase, the symbol is global (external). There |
764 | are however a few lowercase symbols that are shown for special global | |
765 | symbols (@code{u}, @code{v} and @code{w}). | |
252b5132 RH |
766 | |
767 | @c Some more detail on exactly what these symbol types are used for | |
768 | @c would be nice. | |
769 | @table @code | |
770 | @item A | |
771 | The symbol's value is absolute, and will not be changed by further | |
772 | linking. | |
773 | ||
774 | @item B | |
a1039809 | 775 | @itemx b |
252b5132 RH |
776 | The symbol is in the uninitialized data section (known as BSS). |
777 | ||
778 | @item C | |
779 | The symbol is common. Common symbols are uninitialized data. When | |
780 | linking, multiple common symbols may appear with the same name. If the | |
781 | symbol is defined anywhere, the common symbols are treated as undefined | |
0285c67d NC |
782 | references. |
783 | @ifclear man | |
784 | For more details on common symbols, see the discussion of | |
252b5132 | 785 | --warn-common in @ref{Options,,Linker options,ld.info,The GNU linker}. |
0879a67a | 786 | @end ifclear |
252b5132 RH |
787 | |
788 | @item D | |
a1039809 | 789 | @itemx d |
252b5132 RH |
790 | The symbol is in the initialized data section. |
791 | ||
792 | @item G | |
a1039809 | 793 | @itemx g |
252b5132 RH |
794 | The symbol is in an initialized data section for small objects. Some |
795 | object file formats permit more efficient access to small data objects, | |
796 | such as a global int variable as opposed to a large global array. | |
797 | ||
a1039809 | 798 | @item i |
3e7a7d11 NC |
799 | For PE format files this indicates that the symbol is in a section |
800 | specific to the implementation of DLLs. For ELF format files this | |
801 | indicates that the symbol is an indirect function. This is a GNU | |
802 | extension to the standard set of ELF symbol types. It indicates a | |
803 | symbol which if referenced by a relocation does not evaluate to its | |
804 | address, but instead must be invoked at runtime. The runtime | |
805 | execution will then return the value to be used in the relocation. | |
a1039809 | 806 | |
252b5132 RH |
807 | @item N |
808 | The symbol is a debugging symbol. | |
809 | ||
a1039809 NC |
810 | @item p |
811 | The symbols is in a stack unwind section. | |
812 | ||
252b5132 | 813 | @item R |
a1039809 | 814 | @itemx r |
252b5132 RH |
815 | The symbol is in a read only data section. |
816 | ||
817 | @item S | |
a1039809 | 818 | @itemx s |
252b5132 RH |
819 | The symbol is in an uninitialized data section for small objects. |
820 | ||
821 | @item T | |
a1039809 | 822 | @itemx t |
252b5132 RH |
823 | The symbol is in the text (code) section. |
824 | ||
825 | @item U | |
826 | The symbol is undefined. | |
827 | ||
3e7a7d11 NC |
828 | @item u |
829 | The symbol is a unique global symbol. This is a GNU extension to the | |
830 | standard set of ELF symbol bindings. For such a symbol the dynamic linker | |
831 | will make sure that in the entire process there is just one symbol with | |
832 | this name and type in use. | |
833 | ||
fad6fcbb | 834 | @item V |
a1039809 | 835 | @itemx v |
fad6fcbb NC |
836 | The symbol is a weak object. When a weak defined symbol is linked with |
837 | a normal defined symbol, the normal defined symbol is used with no error. | |
838 | When a weak undefined symbol is linked and the symbol is not defined, | |
a1039809 NC |
839 | the value of the weak symbol becomes zero with no error. On some |
840 | systems, uppercase indicates that a default value has been specified. | |
fad6fcbb | 841 | |
252b5132 | 842 | @item W |
a1039809 | 843 | @itemx w |
fad6fcbb NC |
844 | The symbol is a weak symbol that has not been specifically tagged as a |
845 | weak object symbol. When a weak defined symbol is linked with a normal | |
846 | defined symbol, the normal defined symbol is used with no error. | |
847 | When a weak undefined symbol is linked and the symbol is not defined, | |
c87db184 | 848 | the value of the symbol is determined in a system-specific manner without |
c1c0eb9e | 849 | error. On some systems, uppercase indicates that a default value has been |
977cdf5a NC |
850 | specified. |
851 | ||
252b5132 RH |
852 | @item - |
853 | The symbol is a stabs symbol in an a.out object file. In this case, the | |
854 | next values printed are the stabs other field, the stabs desc field, and | |
c7c55b78 NC |
855 | the stab type. Stabs symbols are used to hold debugging information. |
856 | @ifclear man | |
857 | For more information, see @ref{Top,Stabs,Stabs Overview,stabs.info, The | |
252b5132 | 858 | ``stabs'' debug format}. |
c7c55b78 | 859 | @end ifclear |
252b5132 RH |
860 | |
861 | @item ? | |
862 | The symbol type is unknown, or object file format specific. | |
863 | @end table | |
864 | ||
865 | @item | |
866 | The symbol name. | |
867 | @end itemize | |
868 | ||
0285c67d NC |
869 | @c man end |
870 | ||
871 | @c man begin OPTIONS nm | |
252b5132 RH |
872 | The long and short forms of options, shown here as alternatives, are |
873 | equivalent. | |
874 | ||
c7c55b78 | 875 | @table @env |
252b5132 RH |
876 | @item -A |
877 | @itemx -o | |
c1c0eb9e | 878 | @itemx --print-file-name |
252b5132 RH |
879 | @cindex input file name |
880 | @cindex file name | |
881 | @cindex source file name | |
f20a759a | 882 | Precede each symbol by the name of the input file (or archive member) |
252b5132 RH |
883 | in which it was found, rather than identifying the input file once only, |
884 | before all of its symbols. | |
885 | ||
886 | @item -a | |
c1c0eb9e | 887 | @itemx --debug-syms |
252b5132 RH |
888 | @cindex debugging symbols |
889 | Display all symbols, even debugger-only symbols; normally these are not | |
890 | listed. | |
891 | ||
892 | @item -B | |
c7c55b78 NC |
893 | @cindex @command{nm} format |
894 | @cindex @command{nm} compatibility | |
895 | The same as @option{--format=bsd} (for compatibility with the MIPS @command{nm}). | |
252b5132 RH |
896 | |
897 | @item -C | |
28c309a2 | 898 | @itemx --demangle[=@var{style}] |
252b5132 RH |
899 | @cindex demangling in nm |
900 | Decode (@dfn{demangle}) low-level symbol names into user-level names. | |
901 | Besides removing any initial underscore prepended by the system, this | |
28c309a2 | 902 | makes C++ function names readable. Different compilers have different |
c1c0eb9e RM |
903 | mangling styles. The optional demangling style argument can be used to |
904 | choose an appropriate demangling style for your compiler. @xref{c++filt}, | |
28c309a2 | 905 | for more information on demangling. |
252b5132 RH |
906 | |
907 | @item --no-demangle | |
908 | Do not demangle low-level symbol names. This is the default. | |
909 | ||
910 | @item -D | |
911 | @itemx --dynamic | |
912 | @cindex dynamic symbols | |
913 | Display the dynamic symbols rather than the normal symbols. This is | |
914 | only meaningful for dynamic objects, such as certain types of shared | |
915 | libraries. | |
916 | ||
917 | @item -f @var{format} | |
918 | @itemx --format=@var{format} | |
c7c55b78 NC |
919 | @cindex @command{nm} format |
920 | @cindex @command{nm} compatibility | |
252b5132 RH |
921 | Use the output format @var{format}, which can be @code{bsd}, |
922 | @code{sysv}, or @code{posix}. The default is @code{bsd}. | |
923 | Only the first character of @var{format} is significant; it can be | |
924 | either upper or lower case. | |
925 | ||
926 | @item -g | |
c1c0eb9e | 927 | @itemx --extern-only |
252b5132 RH |
928 | @cindex external symbols |
929 | Display only external symbols. | |
930 | ||
fa8f3997 NC |
931 | @item -h |
932 | @itemx --help | |
933 | Show a summary of the options to @command{nm} and exit. | |
ce3c775b | 934 | |
252b5132 RH |
935 | @item -l |
936 | @itemx --line-numbers | |
937 | @cindex symbol line numbers | |
938 | For each symbol, use debugging information to try to find a filename and | |
939 | line number. For a defined symbol, look for the line number of the | |
940 | address of the symbol. For an undefined symbol, look for the line | |
941 | number of a relocation entry which refers to the symbol. If line number | |
942 | information can be found, print it after the other symbol information. | |
943 | ||
944 | @item -n | |
945 | @itemx -v | |
c1c0eb9e | 946 | @itemx --numeric-sort |
252b5132 | 947 | Sort symbols numerically by their addresses, rather than alphabetically |
c1c0eb9e | 948 | by their names. |
252b5132 RH |
949 | |
950 | @item -p | |
c1c0eb9e | 951 | @itemx --no-sort |
252b5132 RH |
952 | @cindex sorting symbols |
953 | Do not bother to sort the symbols in any order; print them in the order | |
954 | encountered. | |
955 | ||
956 | @item -P | |
957 | @itemx --portability | |
958 | Use the POSIX.2 standard output format instead of the default format. | |
959 | Equivalent to @samp{-f posix}. | |
960 | ||
fa8f3997 NC |
961 | @item -r |
962 | @itemx --reverse-sort | |
963 | Reverse the order of the sort (whether numeric or alphabetic); let the | |
964 | last come first. | |
965 | ||
72797995 L |
966 | @item -S |
967 | @itemx --print-size | |
1533edfb AM |
968 | Print both value and size of defined symbols for the @code{bsd} output style. |
969 | This option has no effect for object formats that do not record symbol | |
970 | sizes, unless @samp{--size-sort} is also used in which case a | |
971 | calculated size is displayed. | |
72797995 | 972 | |
252b5132 RH |
973 | @item -s |
974 | @itemx --print-armap | |
975 | @cindex symbol index, listing | |
976 | When listing symbols from archive members, include the index: a mapping | |
c7c55b78 | 977 | (stored in the archive by @command{ar} or @command{ranlib}) of which modules |
252b5132 RH |
978 | contain definitions for which names. |
979 | ||
fa8f3997 NC |
980 | @item -t @var{radix} |
981 | @itemx --radix=@var{radix} | |
982 | Use @var{radix} as the radix for printing the symbol values. It must be | |
983 | @samp{d} for decimal, @samp{o} for octal, or @samp{x} for hexadecimal. | |
984 | ||
985 | @item -u | |
986 | @itemx --undefined-only | |
987 | @cindex external symbols | |
988 | @cindex undefined symbols | |
989 | Display only undefined symbols (those external to each object file). | |
990 | ||
991 | @item -V | |
992 | @itemx --version | |
993 | Show the version number of @command{nm} and exit. | |
994 | ||
995 | @item -X | |
996 | This option is ignored for compatibility with the AIX version of | |
997 | @command{nm}. It takes one parameter which must be the string | |
998 | @option{32_64}. The default mode of AIX @command{nm} corresponds | |
999 | to @option{-X 32}, which is not supported by @sc{gnu} @command{nm}. | |
1000 | ||
1001 | @item --defined-only | |
1002 | @cindex external symbols | |
1003 | @cindex undefined symbols | |
1004 | Display only defined symbols for each object file. | |
1005 | ||
1006 | @item --plugin @var{name} | |
1007 | @cindex load plugin | |
1008 | Load the plugin called @var{name} to add support for extra target | |
1009 | types. This option is only available if the toolchain has been built | |
1010 | with plugin support enabled. | |
252b5132 RH |
1011 | |
1012 | @item --size-sort | |
1013 | Sort symbols by size. The size is computed as the difference between | |
1014 | the value of the symbol and the value of the symbol with the next higher | |
c1c0eb9e RM |
1015 | value. If the @code{bsd} output format is used the size of the symbol |
1016 | is printed, rather than the value, and @samp{-S} must be used in order | |
76ed1927 | 1017 | both size and value to be printed. |
252b5132 | 1018 | |
3c9458e9 NC |
1019 | @item --special-syms |
1020 | Display symbols which have a target-specific special meaning. These | |
1021 | symbols are usually used by the target for some special processing and | |
1022 | are not normally helpful when included included in the normal symbol | |
1023 | lists. For example for ARM targets this option would skip the mapping | |
b45619c0 | 1024 | symbols used to mark transitions between ARM code, THUMB code and |
3c9458e9 NC |
1025 | data. |
1026 | ||
fa8f3997 NC |
1027 | @item --synthetic |
1028 | Include synthetic symbols in the output. These are special symbols | |
1029 | created by the linker for various purposes. They are not shown by | |
1030 | default since they are not part of the binary's original source code. | |
252b5132 RH |
1031 | |
1032 | @item --target=@var{bfdname} | |
1033 | @cindex object code format | |
1034 | Specify an object code format other than your system's default format. | |
1035 | @xref{Target Selection}, for more information. | |
1036 | ||
252b5132 RH |
1037 | @end table |
1038 | ||
0285c67d NC |
1039 | @c man end |
1040 | ||
1041 | @ignore | |
1042 | @c man begin SEEALSO nm | |
1043 | ar(1), objdump(1), ranlib(1), and the Info entries for @file{binutils}. | |
1044 | @c man end | |
1045 | @end ignore | |
1046 | ||
252b5132 RH |
1047 | @node objcopy |
1048 | @chapter objcopy | |
1049 | ||
0285c67d NC |
1050 | @c man title objcopy copy and translate object files |
1051 | ||
252b5132 | 1052 | @smallexample |
0285c67d | 1053 | @c man begin SYNOPSIS objcopy |
c7c55b78 NC |
1054 | objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}] |
1055 | [@option{-I} @var{bfdname}|@option{--input-target=}@var{bfdname}] | |
1056 | [@option{-O} @var{bfdname}|@option{--output-target=}@var{bfdname}] | |
1057 | [@option{-B} @var{bfdarch}|@option{--binary-architecture=}@var{bfdarch}] | |
2593f09a NC |
1058 | [@option{-S}|@option{--strip-all}] |
1059 | [@option{-g}|@option{--strip-debug}] | |
c7c55b78 NC |
1060 | [@option{-K} @var{symbolname}|@option{--keep-symbol=}@var{symbolname}] |
1061 | [@option{-N} @var{symbolname}|@option{--strip-symbol=}@var{symbolname}] | |
bcf32829 | 1062 | [@option{--strip-unneeded-symbol=}@var{symbolname}] |
c7c55b78 | 1063 | [@option{-G} @var{symbolname}|@option{--keep-global-symbol=}@var{symbolname}] |
d58c2e3a | 1064 | [@option{--localize-hidden}] |
c7c55b78 | 1065 | [@option{-L} @var{symbolname}|@option{--localize-symbol=}@var{symbolname}] |
7b4a0685 | 1066 | [@option{--globalize-symbol=}@var{symbolname}] |
c7c55b78 | 1067 | [@option{-W} @var{symbolname}|@option{--weaken-symbol=}@var{symbolname}] |
5fe11841 | 1068 | [@option{-w}|@option{--wildcard}] |
2593f09a NC |
1069 | [@option{-x}|@option{--discard-all}] |
1070 | [@option{-X}|@option{--discard-locals}] | |
c7c55b78 | 1071 | [@option{-b} @var{byte}|@option{--byte=}@var{byte}] |
b7dd81f7 NC |
1072 | [@option{-i} [@var{breadth}]|@option{--interleave}[=@var{breadth}]] |
1073 | [@option{--interleave-width=}@var{width}] | |
2e62b721 NC |
1074 | [@option{-j} @var{sectionpattern}|@option{--only-section=}@var{sectionpattern}] |
1075 | [@option{-R} @var{sectionpattern}|@option{--remove-section=}@var{sectionpattern}] | |
c7c55b78 | 1076 | [@option{-p}|@option{--preserve-dates}] |
2e30cb57 | 1077 | [@option{-D}|@option{--enable-deterministic-archives}] |
955d0b3b | 1078 | [@option{-U}|@option{--disable-deterministic-archives}] |
c7c55b78 | 1079 | [@option{--debugging}] |
2593f09a NC |
1080 | [@option{--gap-fill=}@var{val}] |
1081 | [@option{--pad-to=}@var{address}] | |
1082 | [@option{--set-start=}@var{val}] | |
1083 | [@option{--adjust-start=}@var{incr}] | |
c7c55b78 | 1084 | [@option{--change-addresses=}@var{incr}] |
2e62b721 NC |
1085 | [@option{--change-section-address} @var{sectionpattern}@{=,+,-@}@var{val}] |
1086 | [@option{--change-section-lma} @var{sectionpattern}@{=,+,-@}@var{val}] | |
1087 | [@option{--change-section-vma} @var{sectionpattern}@{=,+,-@}@var{val}] | |
c7c55b78 | 1088 | [@option{--change-warnings}] [@option{--no-change-warnings}] |
2e62b721 | 1089 | [@option{--set-section-flags} @var{sectionpattern}=@var{flags}] |
c7c55b78 NC |
1090 | [@option{--add-section} @var{sectionname}=@var{filename}] |
1091 | [@option{--rename-section} @var{oldname}=@var{newname}[,@var{flags}]] | |
0408dee6 | 1092 | [@option{--long-section-names} @{enable,disable,keep@}] |
2593f09a | 1093 | [@option{--change-leading-char}] [@option{--remove-leading-char}] |
9e48b4c6 | 1094 | [@option{--reverse-bytes=}@var{num}] |
2593f09a NC |
1095 | [@option{--srec-len=}@var{ival}] [@option{--srec-forceS3}] |
1096 | [@option{--redefine-sym} @var{old}=@var{new}] | |
1097 | [@option{--redefine-syms=}@var{filename}] | |
c7c55b78 NC |
1098 | [@option{--weaken}] |
1099 | [@option{--keep-symbols=}@var{filename}] | |
1100 | [@option{--strip-symbols=}@var{filename}] | |
bcf32829 | 1101 | [@option{--strip-unneeded-symbols=}@var{filename}] |
c7c55b78 NC |
1102 | [@option{--keep-global-symbols=}@var{filename}] |
1103 | [@option{--localize-symbols=}@var{filename}] | |
7b4a0685 | 1104 | [@option{--globalize-symbols=}@var{filename}] |
c7c55b78 | 1105 | [@option{--weaken-symbols=}@var{filename}] |
c51238bc DA |
1106 | [@option{--alt-machine-code=}@var{index}] |
1107 | [@option{--prefix-symbols=}@var{string}] | |
1108 | [@option{--prefix-sections=}@var{string}] | |
1109 | [@option{--prefix-alloc-sections=}@var{string}] | |
ed1653a7 | 1110 | [@option{--add-gnu-debuglink=}@var{path-to-file}] |
1637cd90 | 1111 | [@option{--keep-file-symbols}] |
ed1653a7 | 1112 | [@option{--only-keep-debug}] |
96109726 CC |
1113 | [@option{--strip-dwo}] |
1114 | [@option{--extract-dwo}] | |
d3e52d40 | 1115 | [@option{--extract-symbol}] |
4087920c MR |
1116 | [@option{--writable-text}] |
1117 | [@option{--readonly-text}] | |
1118 | [@option{--pure}] | |
1119 | [@option{--impure}] | |
92dd4511 L |
1120 | [@option{--file-alignment=}@var{num}] |
1121 | [@option{--heap=}@var{size}] | |
1122 | [@option{--image-base=}@var{address}] | |
1123 | [@option{--section-alignment=}@var{num}] | |
1124 | [@option{--stack=}@var{size}] | |
1125 | [@option{--subsystem=}@var{which}:@var{major}.@var{minor}] | |
4a114e3e L |
1126 | [@option{--compress-debug-sections}] |
1127 | [@option{--decompress-debug-sections}] | |
fd2f0033 TT |
1128 | [@option{--dwarf-depth=@var{n}}] |
1129 | [@option{--dwarf-start=@var{n}}] | |
c7c55b78 | 1130 | [@option{-v}|@option{--verbose}] |
c1c0eb9e | 1131 | [@option{-V}|@option{--version}] |
7c29036b | 1132 | [@option{--help}] [@option{--info}] |
252b5132 | 1133 | @var{infile} [@var{outfile}] |
0285c67d | 1134 | @c man end |
252b5132 RH |
1135 | @end smallexample |
1136 | ||
0285c67d | 1137 | @c man begin DESCRIPTION objcopy |
c7c55b78 NC |
1138 | The @sc{gnu} @command{objcopy} utility copies the contents of an object |
1139 | file to another. @command{objcopy} uses the @sc{gnu} @sc{bfd} Library to | |
252b5132 RH |
1140 | read and write the object files. It can write the destination object |
1141 | file in a format different from that of the source object file. The | |
c7c55b78 NC |
1142 | exact behavior of @command{objcopy} is controlled by command-line options. |
1143 | Note that @command{objcopy} should be able to copy a fully linked file | |
ccd13d18 L |
1144 | between any two formats. However, copying a relocatable object file |
1145 | between any two formats may not work as expected. | |
252b5132 | 1146 | |
c7c55b78 NC |
1147 | @command{objcopy} creates temporary files to do its translations and |
1148 | deletes them afterward. @command{objcopy} uses @sc{bfd} to do all its | |
252b5132 RH |
1149 | translation work; it has access to all the formats described in @sc{bfd} |
1150 | and thus is able to recognize most formats without being told | |
1151 | explicitly. @xref{BFD,,BFD,ld.info,Using LD}. | |
1152 | ||
c7c55b78 | 1153 | @command{objcopy} can be used to generate S-records by using an output |
252b5132 RH |
1154 | target of @samp{srec} (e.g., use @samp{-O srec}). |
1155 | ||
c7c55b78 NC |
1156 | @command{objcopy} can be used to generate a raw binary file by using an |
1157 | output target of @samp{binary} (e.g., use @option{-O binary}). When | |
1158 | @command{objcopy} generates a raw binary file, it will essentially produce | |
252b5132 RH |
1159 | a memory dump of the contents of the input object file. All symbols and |
1160 | relocation information will be discarded. The memory dump will start at | |
1161 | the load address of the lowest section copied into the output file. | |
1162 | ||
1163 | When generating an S-record or a raw binary file, it may be helpful to | |
c7c55b78 NC |
1164 | use @option{-S} to remove sections containing debugging information. In |
1165 | some cases @option{-R} will be useful to remove sections which contain | |
f20a759a | 1166 | information that is not needed by the binary file. |
252b5132 | 1167 | |
947ed062 NC |
1168 | Note---@command{objcopy} is not able to change the endianness of its input |
1169 | files. If the input format has an endianness (some formats do not), | |
c7c55b78 | 1170 | @command{objcopy} can only copy the inputs into file formats that have the |
947ed062 | 1171 | same endianness or which have no endianness (e.g., @samp{srec}). |
9e48b4c6 | 1172 | (However, see the @option{--reverse-bytes} option.) |
18356cf2 | 1173 | |
0285c67d NC |
1174 | @c man end |
1175 | ||
1176 | @c man begin OPTIONS objcopy | |
1177 | ||
c7c55b78 | 1178 | @table @env |
252b5132 RH |
1179 | @item @var{infile} |
1180 | @itemx @var{outfile} | |
f20a759a | 1181 | The input and output files, respectively. |
c7c55b78 | 1182 | If you do not specify @var{outfile}, @command{objcopy} creates a |
252b5132 RH |
1183 | temporary file and destructively renames the result with |
1184 | the name of @var{infile}. | |
1185 | ||
c7c55b78 | 1186 | @item -I @var{bfdname} |
252b5132 RH |
1187 | @itemx --input-target=@var{bfdname} |
1188 | Consider the source file's object format to be @var{bfdname}, rather than | |
1189 | attempting to deduce it. @xref{Target Selection}, for more information. | |
1190 | ||
1191 | @item -O @var{bfdname} | |
1192 | @itemx --output-target=@var{bfdname} | |
1193 | Write the output file using the object format @var{bfdname}. | |
1194 | @xref{Target Selection}, for more information. | |
1195 | ||
1196 | @item -F @var{bfdname} | |
1197 | @itemx --target=@var{bfdname} | |
1198 | Use @var{bfdname} as the object format for both the input and the output | |
1199 | file; i.e., simply transfer data from source to destination with no | |
1200 | translation. @xref{Target Selection}, for more information. | |
1201 | ||
43a0748c NC |
1202 | @item -B @var{bfdarch} |
1203 | @itemx --binary-architecture=@var{bfdarch} | |
8b31b6c4 NC |
1204 | Useful when transforming a architecture-less input file into an object file. |
1205 | In this case the output architecture can be set to @var{bfdarch}. This | |
1206 | option will be ignored if the input file has a known @var{bfdarch}. You | |
43a0748c NC |
1207 | can access this binary data inside a program by referencing the special |
1208 | symbols that are created by the conversion process. These symbols are | |
1209 | called _binary_@var{objfile}_start, _binary_@var{objfile}_end and | |
1210 | _binary_@var{objfile}_size. e.g. you can transform a picture file into | |
c1c0eb9e | 1211 | an object file and then access it in your code using these symbols. |
43a0748c | 1212 | |
2e62b721 NC |
1213 | @item -j @var{sectionpattern} |
1214 | @itemx --only-section=@var{sectionpattern} | |
1215 | Copy only the indicated sections from the input file to the output file. | |
f91ea849 | 1216 | This option may be given more than once. Note that using this option |
2e62b721 NC |
1217 | inappropriately may make the output file unusable. Wildcard |
1218 | characters are accepted in @var{sectionpattern}. | |
f91ea849 | 1219 | |
2e62b721 NC |
1220 | @item -R @var{sectionpattern} |
1221 | @itemx --remove-section=@var{sectionpattern} | |
1222 | Remove any section matching @var{sectionpattern} from the output file. | |
1223 | This option may be given more than once. Note that using this option | |
1224 | inappropriately may make the output file unusable. Wildcard | |
1225 | characters are accepted in @var{sectionpattern}. Using both the | |
1226 | @option{-j} and @option{-R} options together results in undefined | |
1227 | behaviour. | |
252b5132 RH |
1228 | |
1229 | @item -S | |
1230 | @itemx --strip-all | |
1231 | Do not copy relocation and symbol information from the source file. | |
1232 | ||
1233 | @item -g | |
1234 | @itemx --strip-debug | |
2593f09a | 1235 | Do not copy debugging symbols or sections from the source file. |
252b5132 RH |
1236 | |
1237 | @item --strip-unneeded | |
1238 | Strip all symbols that are not needed for relocation processing. | |
1239 | ||
1240 | @item -K @var{symbolname} | |
1241 | @itemx --keep-symbol=@var{symbolname} | |
e7f918ad NC |
1242 | When stripping symbols, keep symbol @var{symbolname} even if it would |
1243 | normally be stripped. This option may be given more than once. | |
252b5132 RH |
1244 | |
1245 | @item -N @var{symbolname} | |
1246 | @itemx --strip-symbol=@var{symbolname} | |
1247 | Do not copy symbol @var{symbolname} from the source file. This option | |
1248 | may be given more than once. | |
1249 | ||
bcf32829 JB |
1250 | @item --strip-unneeded-symbol=@var{symbolname} |
1251 | Do not copy symbol @var{symbolname} from the source file unless it is needed | |
1252 | by a relocation. This option may be given more than once. | |
1253 | ||
16b2b71c NC |
1254 | @item -G @var{symbolname} |
1255 | @itemx --keep-global-symbol=@var{symbolname} | |
1256 | Keep only symbol @var{symbolname} global. Make all other symbols local | |
1257 | to the file, so that they are not visible externally. This option may | |
1258 | be given more than once. | |
1259 | ||
d58c2e3a RS |
1260 | @item --localize-hidden |
1261 | In an ELF object, mark all symbols that have hidden or internal visibility | |
1262 | as local. This option applies on top of symbol-specific localization options | |
1263 | such as @option{-L}. | |
1264 | ||
252b5132 RH |
1265 | @item -L @var{symbolname} |
1266 | @itemx --localize-symbol=@var{symbolname} | |
1267 | Make symbol @var{symbolname} local to the file, so that it is not | |
1268 | visible externally. This option may be given more than once. | |
1269 | ||
1270 | @item -W @var{symbolname} | |
1271 | @itemx --weaken-symbol=@var{symbolname} | |
1272 | Make symbol @var{symbolname} weak. This option may be given more than once. | |
1273 | ||
7b4a0685 NC |
1274 | @item --globalize-symbol=@var{symbolname} |
1275 | Give symbol @var{symbolname} global scoping so that it is visible | |
1276 | outside of the file in which it is defined. This option may be given | |
1277 | more than once. | |
1278 | ||
5fe11841 NC |
1279 | @item -w |
1280 | @itemx --wildcard | |
1281 | Permit regular expressions in @var{symbolname}s used in other command | |
1282 | line options. The question mark (?), asterisk (*), backslash (\) and | |
1283 | square brackets ([]) operators can be used anywhere in the symbol | |
1284 | name. If the first character of the symbol name is the exclamation | |
1285 | point (!) then the sense of the switch is reversed for that symbol. | |
1286 | For example: | |
1287 | ||
1288 | @smallexample | |
1289 | -w -W !foo -W fo* | |
1290 | @end smallexample | |
1291 | ||
1292 | would cause objcopy to weaken all symbols that start with ``fo'' | |
1293 | except for the symbol ``foo''. | |
1294 | ||
252b5132 RH |
1295 | @item -x |
1296 | @itemx --discard-all | |
1297 | Do not copy non-global symbols from the source file. | |
1298 | @c FIXME any reason to prefer "non-global" to "local" here? | |
1299 | ||
1300 | @item -X | |
1301 | @itemx --discard-locals | |
1302 | Do not copy compiler-generated local symbols. | |
1303 | (These usually start with @samp{L} or @samp{.}.) | |
1304 | ||
1305 | @item -b @var{byte} | |
1306 | @itemx --byte=@var{byte} | |
b7dd81f7 NC |
1307 | If interleaving has been enabled via the @option{--interleave} option |
1308 | then start the range of bytes to keep at the @var{byte}th byte. | |
1309 | @var{byte} can be in the range from 0 to @var{breadth}-1, where | |
1310 | @var{breadth} is the value given by the @option{--interleave} option. | |
1311 | ||
1312 | @item -i [@var{breadth}] | |
1313 | @itemx --interleave[=@var{breadth}] | |
1314 | Only copy a range out of every @var{breadth} bytes. (Header data is | |
1315 | not affected). Select which byte in the range begins the copy with | |
1316 | the @option{--byte} option. Select the width of the range with the | |
1317 | @option{--interleave-width} option. | |
1318 | ||
1319 | This option is useful for creating files to program @sc{rom}. It is | |
1320 | typically used with an @code{srec} output target. Note that | |
1321 | @command{objcopy} will complain if you do not specify the | |
1322 | @option{--byte} option as well. | |
1323 | ||
1324 | The default interleave breadth is 4, so with @option{--byte} set to 0, | |
1325 | @command{objcopy} would copy the first byte out of every four bytes | |
1326 | from the input to the output. | |
1327 | ||
1328 | @item --interleave-width=@var{width} | |
1329 | When used with the @option{--interleave} option, copy @var{width} | |
1330 | bytes at a time. The start of the range of bytes to be copied is set | |
1331 | by the @option{--byte} option, and the extent of the range is set with | |
1332 | the @option{--interleave} option. | |
1333 | ||
1334 | The default value for this option is 1. The value of @var{width} plus | |
1335 | the @var{byte} value set by the @option{--byte} option must not exceed | |
1336 | the interleave breadth set by the @option{--interleave} option. | |
1337 | ||
1338 | This option can be used to create images for two 16-bit flashes interleaved | |
1339 | in a 32-bit bus by passing @option{-b 0 -i 4 --interleave-width=2} | |
1340 | and @option{-b 2 -i 4 --interleave-width=2} to two @command{objcopy} | |
1341 | commands. If the input was '12345678' then the outputs would be | |
1342 | '1256' and '3478' respectively. | |
252b5132 RH |
1343 | |
1344 | @item -p | |
1345 | @itemx --preserve-dates | |
1346 | Set the access and modification dates of the output file to be the same | |
1347 | as those of the input file. | |
1348 | ||
2e30cb57 CC |
1349 | @item -D |
1350 | @itemx --enable-deterministic-archives | |
955d0b3b RM |
1351 | @cindex deterministic archives |
1352 | @kindex --enable-deterministic-archives | |
2e30cb57 CC |
1353 | Operate in @emph{deterministic} mode. When copying archive members |
1354 | and writing the archive index, use zero for UIDs, GIDs, timestamps, | |
1355 | and use consistent file modes for all files. | |
1356 | ||
955d0b3b RM |
1357 | If @file{binutils} was configured with |
1358 | @option{--enable-deterministic-archives}, then this mode is on by default. | |
1359 | It can be disabled with the @samp{-U} option, below. | |
1360 | ||
1361 | @item -U | |
1362 | @itemx --disable-deterministic-archives | |
1363 | @cindex deterministic archives | |
1364 | @kindex --enable-deterministic-archives | |
1365 | Do @emph{not} operate in @emph{deterministic} mode. This is the | |
1366 | inverse of the @option{-D} option, above: when copying archive members | |
1367 | and writing the archive index, use their actual UID, GID, timestamp, | |
1368 | and file mode values. | |
1369 | ||
1370 | This is the default unless @file{binutils} was configured with | |
1371 | @option{--enable-deterministic-archives}. | |
1372 | ||
252b5132 RH |
1373 | @item --debugging |
1374 | Convert debugging information, if possible. This is not the default | |
1375 | because only certain debugging formats are supported, and the | |
1376 | conversion process can be time consuming. | |
1377 | ||
1378 | @item --gap-fill @var{val} | |
1379 | Fill gaps between sections with @var{val}. This operation applies to | |
1380 | the @emph{load address} (LMA) of the sections. It is done by increasing | |
1381 | the size of the section with the lower address, and filling in the extra | |
1382 | space created with @var{val}. | |
1383 | ||
1384 | @item --pad-to @var{address} | |
1385 | Pad the output file up to the load address @var{address}. This is | |
1386 | done by increasing the size of the last section. The extra space is | |
c7c55b78 | 1387 | filled in with the value specified by @option{--gap-fill} (default zero). |
252b5132 RH |
1388 | |
1389 | @item --set-start @var{val} | |
f20a759a | 1390 | Set the start address of the new file to @var{val}. Not all object file |
252b5132 RH |
1391 | formats support setting the start address. |
1392 | ||
1393 | @item --change-start @var{incr} | |
1394 | @itemx --adjust-start @var{incr} | |
1395 | @cindex changing start address | |
1396 | Change the start address by adding @var{incr}. Not all object file | |
1397 | formats support setting the start address. | |
1398 | ||
1399 | @item --change-addresses @var{incr} | |
1400 | @itemx --adjust-vma @var{incr} | |
1401 | @cindex changing object addresses | |
1402 | Change the VMA and LMA addresses of all sections, as well as the start | |
1403 | address, by adding @var{incr}. Some object file formats do not permit | |
1404 | section addresses to be changed arbitrarily. Note that this does not | |
1405 | relocate the sections; if the program expects sections to be loaded at a | |
1406 | certain address, and this option is used to change the sections such | |
c1c0eb9e | 1407 | that they are loaded at a different address, the program may fail. |
252b5132 | 1408 | |
2e62b721 NC |
1409 | @item --change-section-address @var{sectionpattern}@{=,+,-@}@var{val} |
1410 | @itemx --adjust-section-vma @var{sectionpattern}@{=,+,-@}@var{val} | |
252b5132 | 1411 | @cindex changing section address |
2e62b721 NC |
1412 | Set or change both the VMA address and the LMA address of any section |
1413 | matching @var{sectionpattern}. If @samp{=} is used, the section | |
1414 | address is set to @var{val}. Otherwise, @var{val} is added to or | |
1415 | subtracted from the section address. See the comments under | |
1416 | @option{--change-addresses}, above. If @var{sectionpattern} does not | |
1417 | match any sections in the input file, a warning will be issued, unless | |
1418 | @option{--no-change-warnings} is used. | |
252b5132 | 1419 | |
2e62b721 | 1420 | @item --change-section-lma @var{sectionpattern}@{=,+,-@}@var{val} |
252b5132 | 1421 | @cindex changing section LMA |
2e62b721 NC |
1422 | Set or change the LMA address of any sections matching |
1423 | @var{sectionpattern}. The LMA address is the address where the | |
1424 | section will be loaded into memory at program load time. Normally | |
1425 | this is the same as the VMA address, which is the address of the | |
1426 | section at program run time, but on some systems, especially those | |
1427 | where a program is held in ROM, the two can be different. If @samp{=} | |
1428 | is used, the section address is set to @var{val}. Otherwise, | |
1429 | @var{val} is added to or subtracted from the section address. See the | |
1430 | comments under @option{--change-addresses}, above. If | |
1431 | @var{sectionpattern} does not match any sections in the input file, a | |
1432 | warning will be issued, unless @option{--no-change-warnings} is used. | |
1433 | ||
1434 | @item --change-section-vma @var{sectionpattern}@{=,+,-@}@var{val} | |
1435 | @cindex changing section VMA | |
1436 | Set or change the VMA address of any section matching | |
1437 | @var{sectionpattern}. The VMA address is the address where the | |
1438 | section will be located once the program has started executing. | |
1439 | Normally this is the same as the LMA address, which is the address | |
1440 | where the section will be loaded into memory, but on some systems, | |
252b5132 RH |
1441 | especially those where a program is held in ROM, the two can be |
1442 | different. If @samp{=} is used, the section address is set to | |
1443 | @var{val}. Otherwise, @var{val} is added to or subtracted from the | |
c7c55b78 | 1444 | section address. See the comments under @option{--change-addresses}, |
2e62b721 NC |
1445 | above. If @var{sectionpattern} does not match any sections in the |
1446 | input file, a warning will be issued, unless | |
c1c0eb9e | 1447 | @option{--no-change-warnings} is used. |
252b5132 RH |
1448 | |
1449 | @item --change-warnings | |
1450 | @itemx --adjust-warnings | |
c7c55b78 | 1451 | If @option{--change-section-address} or @option{--change-section-lma} or |
2e62b721 NC |
1452 | @option{--change-section-vma} is used, and the section pattern does not |
1453 | match any sections, issue a warning. This is the default. | |
252b5132 RH |
1454 | |
1455 | @item --no-change-warnings | |
1456 | @itemx --no-adjust-warnings | |
c7c55b78 NC |
1457 | Do not issue a warning if @option{--change-section-address} or |
1458 | @option{--adjust-section-lma} or @option{--adjust-section-vma} is used, even | |
2e62b721 NC |
1459 | if the section pattern does not match any sections. |
1460 | ||
1461 | @item --set-section-flags @var{sectionpattern}=@var{flags} | |
1462 | Set the flags for any sections matching @var{sectionpattern}. The | |
1463 | @var{flags} argument is a comma separated string of flag names. The | |
1464 | recognized names are @samp{alloc}, @samp{contents}, @samp{load}, | |
1465 | @samp{noload}, @samp{readonly}, @samp{code}, @samp{data}, @samp{rom}, | |
1466 | @samp{share}, and @samp{debug}. You can set the @samp{contents} flag | |
1467 | for a section which does not have contents, but it is not meaningful | |
1468 | to clear the @samp{contents} flag of a section which does have | |
1469 | contents--just remove the section instead. Not all flags are | |
1470 | meaningful for all object file formats. | |
252b5132 RH |
1471 | |
1472 | @item --add-section @var{sectionname}=@var{filename} | |
1473 | Add a new section named @var{sectionname} while copying the file. The | |
1474 | contents of the new section are taken from the file @var{filename}. The | |
1475 | size of the section will be the size of the file. This option only | |
1476 | works on file formats which can support sections with arbitrary names. | |
1477 | ||
594ef5db NC |
1478 | @item --rename-section @var{oldname}=@var{newname}[,@var{flags}] |
1479 | Rename a section from @var{oldname} to @var{newname}, optionally | |
1480 | changing the section's flags to @var{flags} in the process. This has | |
1481 | the advantage over usng a linker script to perform the rename in that | |
1482 | the output stays as an object file and does not become a linked | |
1483 | executable. | |
1484 | ||
1485 | This option is particularly helpful when the input format is binary, | |
1486 | since this will always create a section called .data. If for example, | |
1487 | you wanted instead to create a section called .rodata containing binary | |
1488 | data you could use the following command line to achieve it: | |
1489 | ||
1490 | @smallexample | |
1491 | objcopy -I binary -O <output_format> -B <architecture> \ | |
1492 | --rename-section .data=.rodata,alloc,load,readonly,data,contents \ | |
1493 | <input_binary_file> <output_object_file> | |
1494 | @end smallexample | |
1495 | ||
0408dee6 DK |
1496 | @item --long-section-names @{enable,disable,keep@} |
1497 | Controls the handling of long section names when processing @code{COFF} | |
1498 | and @code{PE-COFF} object formats. The default behaviour, @samp{keep}, | |
1499 | is to preserve long section names if any are present in the input file. | |
1500 | The @samp{enable} and @samp{disable} options forcibly enable or disable | |
1501 | the use of long section names in the output object; when @samp{disable} | |
1502 | is in effect, any long section names in the input object will be truncated. | |
1503 | The @samp{enable} option will only emit long section names if any are | |
1504 | present in the inputs; this is mostly the same as @samp{keep}, but it | |
b3364cb9 | 1505 | is left undefined whether the @samp{enable} option might force the |
0408dee6 DK |
1506 | creation of an empty string table in the output file. |
1507 | ||
252b5132 RH |
1508 | @item --change-leading-char |
1509 | Some object file formats use special characters at the start of | |
1510 | symbols. The most common such character is underscore, which compilers | |
c7c55b78 | 1511 | often add before every symbol. This option tells @command{objcopy} to |
252b5132 RH |
1512 | change the leading character of every symbol when it converts between |
1513 | object file formats. If the object file formats use the same leading | |
1514 | character, this option has no effect. Otherwise, it will add a | |
1515 | character, or remove a character, or change a character, as | |
1516 | appropriate. | |
1517 | ||
1518 | @item --remove-leading-char | |
1519 | If the first character of a global symbol is a special symbol leading | |
1520 | character used by the object file format, remove the character. The | |
1521 | most common symbol leading character is underscore. This option will | |
1522 | remove a leading underscore from all global symbols. This can be useful | |
1523 | if you want to link together objects of different file formats with | |
1524 | different conventions for symbol names. This is different from | |
c7c55b78 | 1525 | @option{--change-leading-char} because it always changes the symbol name |
252b5132 RH |
1526 | when appropriate, regardless of the object file format of the output |
1527 | file. | |
1528 | ||
9e48b4c6 NC |
1529 | @item --reverse-bytes=@var{num} |
1530 | Reverse the bytes in a section with output contents. A section length must | |
1531 | be evenly divisible by the value given in order for the swap to be able to | |
1532 | take place. Reversing takes place before the interleaving is performed. | |
1533 | ||
1534 | This option is used typically in generating ROM images for problematic | |
1535 | target systems. For example, on some target boards, the 32-bit words | |
1536 | fetched from 8-bit ROMs are re-assembled in little-endian byte order | |
1537 | regardless of the CPU byte order. Depending on the programming model, the | |
1538 | endianness of the ROM may need to be modified. | |
1539 | ||
1540 | Consider a simple file with a section containing the following eight | |
1541 | bytes: @code{12345678}. | |
1542 | ||
1543 | Using @samp{--reverse-bytes=2} for the above example, the bytes in the | |
1544 | output file would be ordered @code{21436587}. | |
1545 | ||
1546 | Using @samp{--reverse-bytes=4} for the above example, the bytes in the | |
1547 | output file would be ordered @code{43218765}. | |
1548 | ||
1549 | By using @samp{--reverse-bytes=2} for the above example, followed by | |
1550 | @samp{--reverse-bytes=4} on the output file, the bytes in the second | |
1551 | output file would be ordered @code{34127856}. | |
1552 | ||
420496c1 NC |
1553 | @item --srec-len=@var{ival} |
1554 | Meaningful only for srec output. Set the maximum length of the Srecords | |
1555 | being produced to @var{ival}. This length covers both address, data and | |
1556 | crc fields. | |
1557 | ||
1558 | @item --srec-forceS3 | |
c1c0eb9e | 1559 | Meaningful only for srec output. Avoid generation of S1/S2 records, |
420496c1 NC |
1560 | creating S3-only record format. |
1561 | ||
57938635 AM |
1562 | @item --redefine-sym @var{old}=@var{new} |
1563 | Change the name of a symbol @var{old}, to @var{new}. This can be useful | |
1564 | when one is trying link two things together for which you have no | |
1565 | source, and there are name collisions. | |
1566 | ||
92991082 JT |
1567 | @item --redefine-syms=@var{filename} |
1568 | Apply @option{--redefine-sym} to each symbol pair "@var{old} @var{new}" | |
1569 | listed in the file @var{filename}. @var{filename} is simply a flat file, | |
1570 | with one symbol pair per line. Line comments may be introduced by the hash | |
1571 | character. This option may be given more than once. | |
1572 | ||
252b5132 RH |
1573 | @item --weaken |
1574 | Change all global symbols in the file to be weak. This can be useful | |
1575 | when building an object which will be linked against other objects using | |
c7c55b78 | 1576 | the @option{-R} option to the linker. This option is only effective when |
252b5132 RH |
1577 | using an object file format which supports weak symbols. |
1578 | ||
16b2b71c | 1579 | @item --keep-symbols=@var{filename} |
c7c55b78 | 1580 | Apply @option{--keep-symbol} option to each symbol listed in the file |
16b2b71c NC |
1581 | @var{filename}. @var{filename} is simply a flat file, with one symbol |
1582 | name per line. Line comments may be introduced by the hash character. | |
1583 | This option may be given more than once. | |
1584 | ||
1585 | @item --strip-symbols=@var{filename} | |
c7c55b78 | 1586 | Apply @option{--strip-symbol} option to each symbol listed in the file |
16b2b71c NC |
1587 | @var{filename}. @var{filename} is simply a flat file, with one symbol |
1588 | name per line. Line comments may be introduced by the hash character. | |
1589 | This option may be given more than once. | |
1590 | ||
bcf32829 JB |
1591 | @item --strip-unneeded-symbols=@var{filename} |
1592 | Apply @option{--strip-unneeded-symbol} option to each symbol listed in | |
1593 | the file @var{filename}. @var{filename} is simply a flat file, with one | |
1594 | symbol name per line. Line comments may be introduced by the hash | |
1595 | character. This option may be given more than once. | |
1596 | ||
16b2b71c | 1597 | @item --keep-global-symbols=@var{filename} |
c7c55b78 | 1598 | Apply @option{--keep-global-symbol} option to each symbol listed in the |
16b2b71c NC |
1599 | file @var{filename}. @var{filename} is simply a flat file, with one |
1600 | symbol name per line. Line comments may be introduced by the hash | |
1601 | character. This option may be given more than once. | |
1602 | ||
1603 | @item --localize-symbols=@var{filename} | |
c7c55b78 | 1604 | Apply @option{--localize-symbol} option to each symbol listed in the file |
16b2b71c NC |
1605 | @var{filename}. @var{filename} is simply a flat file, with one symbol |
1606 | name per line. Line comments may be introduced by the hash character. | |
1607 | This option may be given more than once. | |
1608 | ||
7b4a0685 NC |
1609 | @item --globalize-symbols=@var{filename} |
1610 | Apply @option{--globalize-symbol} option to each symbol listed in the file | |
1611 | @var{filename}. @var{filename} is simply a flat file, with one symbol | |
1612 | name per line. Line comments may be introduced by the hash character. | |
1613 | This option may be given more than once. | |
1614 | ||
16b2b71c | 1615 | @item --weaken-symbols=@var{filename} |
c7c55b78 | 1616 | Apply @option{--weaken-symbol} option to each symbol listed in the file |
16b2b71c NC |
1617 | @var{filename}. @var{filename} is simply a flat file, with one symbol |
1618 | name per line. Line comments may be introduced by the hash character. | |
1619 | This option may be given more than once. | |
1620 | ||
1ae8b3d2 AO |
1621 | @item --alt-machine-code=@var{index} |
1622 | If the output architecture has alternate machine codes, use the | |
1623 | @var{index}th code instead of the default one. This is useful in case | |
c1c0eb9e | 1624 | a machine is assigned an official code and the tool-chain adopts the |
1ae8b3d2 | 1625 | new code, but other applications still depend on the original code |
f9d4ad2a NC |
1626 | being used. For ELF based architectures if the @var{index} |
1627 | alternative does not exist then the value is treated as an absolute | |
1628 | number to be stored in the e_machine field of the ELF header. | |
1ae8b3d2 | 1629 | |
4087920c MR |
1630 | @item --writable-text |
1631 | Mark the output text as writable. This option isn't meaningful for all | |
1632 | object file formats. | |
1633 | ||
1634 | @item --readonly-text | |
1635 | Make the output text write protected. This option isn't meaningful for all | |
1636 | object file formats. | |
1637 | ||
1638 | @item --pure | |
1639 | Mark the output file as demand paged. This option isn't meaningful for all | |
1640 | object file formats. | |
1641 | ||
1642 | @item --impure | |
1643 | Mark the output file as impure. This option isn't meaningful for all | |
1644 | object file formats. | |
1645 | ||
d7fb0dd2 NC |
1646 | @item --prefix-symbols=@var{string} |
1647 | Prefix all symbols in the output file with @var{string}. | |
1648 | ||
1649 | @item --prefix-sections=@var{string} | |
1650 | Prefix all section names in the output file with @var{string}. | |
1651 | ||
1652 | @item --prefix-alloc-sections=@var{string} | |
1653 | Prefix all the names of all allocated sections in the output file with | |
1654 | @var{string}. | |
1655 | ||
ed1653a7 NC |
1656 | @item --add-gnu-debuglink=@var{path-to-file} |
1657 | Creates a .gnu_debuglink section which contains a reference to @var{path-to-file} | |
1658 | and adds it to the output file. | |
1659 | ||
1637cd90 JB |
1660 | @item --keep-file-symbols |
1661 | When stripping a file, perhaps with @option{--strip-debug} or | |
1662 | @option{--strip-unneeded}, retain any symbols specifying source file names, | |
1663 | which would otherwise get stripped. | |
1664 | ||
ed1653a7 | 1665 | @item --only-keep-debug |
36d3b955 MR |
1666 | Strip a file, removing contents of any sections that would not be |
1667 | stripped by @option{--strip-debug} and leaving the debugging sections | |
c1c0eb9e | 1668 | intact. In ELF files, this preserves all note sections in the output. |
ed1653a7 NC |
1669 | |
1670 | The intention is that this option will be used in conjunction with | |
1671 | @option{--add-gnu-debuglink} to create a two part executable. One a | |
1672 | stripped binary which will occupy less space in RAM and in a | |
1673 | distribution and the second a debugging information file which is only | |
1674 | needed if debugging abilities are required. The suggested procedure | |
1675 | to create these files is as follows: | |
1676 | ||
b96fec5e DK |
1677 | @enumerate |
1678 | @item Link the executable as normal. Assuming that is is called | |
1679 | @code{foo} then... | |
1680 | @item Run @code{objcopy --only-keep-debug foo foo.dbg} to | |
1681 | create a file containing the debugging info. | |
1682 | @item Run @code{objcopy --strip-debug foo} to create a | |
1683 | stripped executable. | |
1684 | @item Run @code{objcopy --add-gnu-debuglink=foo.dbg foo} | |
1685 | to add a link to the debugging info into the stripped executable. | |
1686 | @end enumerate | |
1687 | ||
1688 | Note---the choice of @code{.dbg} as an extension for the debug info | |
1689 | file is arbitrary. Also the @code{--only-keep-debug} step is | |
1690 | optional. You could instead do this: | |
1691 | ||
1692 | @enumerate | |
1693 | @item Link the executable as normal. | |
1694 | @item Copy @code{foo} to @code{foo.full} | |
1695 | @item Run @code{objcopy --strip-debug foo} | |
1696 | @item Run @code{objcopy --add-gnu-debuglink=foo.full foo} | |
1697 | @end enumerate | |
1698 | ||
1699 | i.e., the file pointed to by the @option{--add-gnu-debuglink} can be the | |
1700 | full executable. It does not have to be a file created by the | |
1701 | @option{--only-keep-debug} switch. | |
1702 | ||
1703 | Note---this switch is only intended for use on fully linked files. It | |
1704 | does not make sense to use it on object files where the debugging | |
1705 | information may be incomplete. Besides the gnu_debuglink feature | |
1706 | currently only supports the presence of one filename containing | |
1707 | debugging information, not multiple filenames on a one-per-object-file | |
1708 | basis. | |
1709 | ||
96109726 CC |
1710 | @item --strip-dwo |
1711 | Remove the contents of all DWARF .dwo sections, leaving the | |
1712 | remaining debugging sections and all symbols intact. | |
1713 | This option is intended for use by the compiler as part of | |
1714 | the @option{-gsplit-dwarf} option, which splits debug information | |
1715 | between the .o file and a separate .dwo file. The compiler | |
1716 | generates all debug information in the same file, then uses | |
1717 | the @option{--extract-dwo} option to copy the .dwo sections to | |
1718 | the .dwo file, then the @option{--strip-dwo} option to remove | |
1719 | those sections from the original .o file. | |
1720 | ||
1721 | @item --extract-dwo | |
1722 | Extract the contents of all DWARF .dwo sections. See the | |
1723 | @option{--strip-dwo} option for more information. | |
1724 | ||
92dd4511 L |
1725 | @item --file-alignment @var{num} |
1726 | Specify the file alignment. Sections in the file will always begin at | |
1727 | file offsets which are multiples of this number. This defaults to | |
1728 | 512. | |
1729 | [This option is specific to PE targets.] | |
1730 | ||
1731 | @item --heap @var{reserve} | |
1732 | @itemx --heap @var{reserve},@var{commit} | |
1733 | Specify the number of bytes of memory to reserve (and optionally commit) | |
1734 | to be used as heap for this program. | |
1735 | [This option is specific to PE targets.] | |
1736 | ||
1737 | @item --image-base @var{value} | |
1738 | Use @var{value} as the base address of your program or dll. This is | |
1739 | the lowest memory location that will be used when your program or dll | |
1740 | is loaded. To reduce the need to relocate and improve performance of | |
1741 | your dlls, each should have a unique base address and not overlap any | |
1742 | other dlls. The default is 0x400000 for executables, and 0x10000000 | |
1743 | for dlls. | |
1744 | [This option is specific to PE targets.] | |
1745 | ||
1746 | @item --section-alignment @var{num} | |
1747 | Sets the section alignment. Sections in memory will always begin at | |
1748 | addresses which are a multiple of this number. Defaults to 0x1000. | |
1749 | [This option is specific to PE targets.] | |
1750 | ||
1751 | @item --stack @var{reserve} | |
1752 | @itemx --stack @var{reserve},@var{commit} | |
1753 | Specify the number of bytes of memory to reserve (and optionally commit) | |
1754 | to be used as stack for this program. | |
1755 | [This option is specific to PE targets.] | |
1756 | ||
1757 | @item --subsystem @var{which} | |
1758 | @itemx --subsystem @var{which}:@var{major} | |
1759 | @itemx --subsystem @var{which}:@var{major}.@var{minor} | |
1760 | Specifies the subsystem under which your program will execute. The | |
1761 | legal values for @var{which} are @code{native}, @code{windows}, | |
1762 | @code{console}, @code{posix}, @code{efi-app}, @code{efi-bsd}, | |
d9118602 | 1763 | @code{efi-rtd}, @code{sal-rtd}, and @code{xbox}. You may optionally set |
92dd4511 L |
1764 | the subsystem version also. Numeric values are also accepted for |
1765 | @var{which}. | |
1766 | [This option is specific to PE targets.] | |
1767 | ||
d3e52d40 RS |
1768 | @item --extract-symbol |
1769 | Keep the file's section flags and symbols but remove all section data. | |
1770 | Specifically, the option: | |
1771 | ||
1772 | @itemize | |
d3e52d40 RS |
1773 | @item removes the contents of all sections; |
1774 | @item sets the size of every section to zero; and | |
1775 | @item sets the file's start address to zero. | |
1776 | @end itemize | |
c1c0eb9e | 1777 | |
d3e52d40 RS |
1778 | This option is used to build a @file{.sym} file for a VxWorks kernel. |
1779 | It can also be a useful way of reducing the size of a @option{--just-symbols} | |
1780 | linker input file. | |
1781 | ||
4a114e3e L |
1782 | @item --compress-debug-sections |
1783 | Compress DWARF debug sections using zlib. | |
1784 | ||
1785 | @item --decompress-debug-sections | |
1786 | Decompress DWARF debug sections using zlib. | |
1787 | ||
252b5132 RH |
1788 | @item -V |
1789 | @itemx --version | |
c7c55b78 | 1790 | Show the version number of @command{objcopy}. |
252b5132 RH |
1791 | |
1792 | @item -v | |
1793 | @itemx --verbose | |
1794 | Verbose output: list all object files modified. In the case of | |
1795 | archives, @samp{objcopy -V} lists all members of the archive. | |
1796 | ||
1797 | @item --help | |
c7c55b78 | 1798 | Show a summary of the options to @command{objcopy}. |
7c29036b NC |
1799 | |
1800 | @item --info | |
1801 | Display a list showing all architectures and object formats available. | |
252b5132 RH |
1802 | @end table |
1803 | ||
0285c67d NC |
1804 | @c man end |
1805 | ||
1806 | @ignore | |
1807 | @c man begin SEEALSO objcopy | |
1808 | ld(1), objdump(1), and the Info entries for @file{binutils}. | |
1809 | @c man end | |
1810 | @end ignore | |
1811 | ||
252b5132 RH |
1812 | @node objdump |
1813 | @chapter objdump | |
1814 | ||
1815 | @cindex object file information | |
1816 | @kindex objdump | |
1817 | ||
0285c67d NC |
1818 | @c man title objdump display information from object files. |
1819 | ||
252b5132 | 1820 | @smallexample |
0285c67d | 1821 | @c man begin SYNOPSIS objdump |
c7c55b78 NC |
1822 | objdump [@option{-a}|@option{--archive-headers}] |
1823 | [@option{-b} @var{bfdname}|@option{--target=@var{bfdname}}] | |
1824 | [@option{-C}|@option{--demangle}[=@var{style}] ] | |
1825 | [@option{-d}|@option{--disassemble}] | |
1826 | [@option{-D}|@option{--disassemble-all}] | |
1827 | [@option{-z}|@option{--disassemble-zeroes}] | |
1828 | [@option{-EB}|@option{-EL}|@option{--endian=}@{big | little @}] | |
1829 | [@option{-f}|@option{--file-headers}] | |
98ec6e72 | 1830 | [@option{-F}|@option{--file-offsets}] |
c7c55b78 NC |
1831 | [@option{--file-start-context}] |
1832 | [@option{-g}|@option{--debugging}] | |
51cdc6e0 | 1833 | [@option{-e}|@option{--debugging-tags}] |
c7c55b78 NC |
1834 | [@option{-h}|@option{--section-headers}|@option{--headers}] |
1835 | [@option{-i}|@option{--info}] | |
1836 | [@option{-j} @var{section}|@option{--section=}@var{section}] | |
1837 | [@option{-l}|@option{--line-numbers}] | |
1838 | [@option{-S}|@option{--source}] | |
1839 | [@option{-m} @var{machine}|@option{--architecture=}@var{machine}] | |
1840 | [@option{-M} @var{options}|@option{--disassembler-options=}@var{options}] | |
1841 | [@option{-p}|@option{--private-headers}] | |
6abcee90 | 1842 | [@option{-P} @var{options}|@option{--private=}@var{options}] |
c7c55b78 NC |
1843 | [@option{-r}|@option{--reloc}] |
1844 | [@option{-R}|@option{--dynamic-reloc}] | |
1845 | [@option{-s}|@option{--full-contents}] | |
f9f0e732 | 1846 | [@option{-W[lLiaprmfFsoRt]}| |
5bbdf3d5 | 1847 | @option{--dwarf}[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index]] |
c7c55b78 NC |
1848 | [@option{-G}|@option{--stabs}] |
1849 | [@option{-t}|@option{--syms}] | |
1850 | [@option{-T}|@option{--dynamic-syms}] | |
1851 | [@option{-x}|@option{--all-headers}] | |
1852 | [@option{-w}|@option{--wide}] | |
1853 | [@option{--start-address=}@var{address}] | |
1854 | [@option{--stop-address=}@var{address}] | |
1855 | [@option{--prefix-addresses}] | |
1856 | [@option{--[no-]show-raw-insn}] | |
1857 | [@option{--adjust-vma=}@var{offset}] | |
3c9458e9 | 1858 | [@option{--special-syms}] |
0dafdf3f L |
1859 | [@option{--prefix=}@var{prefix}] |
1860 | [@option{--prefix-strip=}@var{level}] | |
3dcb3fcb | 1861 | [@option{--insn-width=}@var{width}] |
c7c55b78 NC |
1862 | [@option{-V}|@option{--version}] |
1863 | [@option{-H}|@option{--help}] | |
252b5132 | 1864 | @var{objfile}@dots{} |
0285c67d | 1865 | @c man end |
252b5132 RH |
1866 | @end smallexample |
1867 | ||
0285c67d NC |
1868 | @c man begin DESCRIPTION objdump |
1869 | ||
c7c55b78 | 1870 | @command{objdump} displays information about one or more object files. |
252b5132 RH |
1871 | The options control what particular information to display. This |
1872 | information is mostly useful to programmers who are working on the | |
1873 | compilation tools, as opposed to programmers who just want their | |
1874 | program to compile and work. | |
1875 | ||
1876 | @var{objfile}@dots{} are the object files to be examined. When you | |
c7c55b78 | 1877 | specify archives, @command{objdump} shows information on each of the member |
252b5132 RH |
1878 | object files. |
1879 | ||
0285c67d NC |
1880 | @c man end |
1881 | ||
1882 | @c man begin OPTIONS objdump | |
1883 | ||
252b5132 | 1884 | The long and short forms of options, shown here as alternatives, are |
1dada9c5 | 1885 | equivalent. At least one option from the list |
6abcee90 | 1886 | @option{-a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-P,-r,-R,-s,-S,-t,-T,-V,-x} must be given. |
252b5132 | 1887 | |
c7c55b78 | 1888 | @table @env |
252b5132 RH |
1889 | @item -a |
1890 | @itemx --archive-header | |
1891 | @cindex archive headers | |
1892 | If any of the @var{objfile} files are archives, display the archive | |
1893 | header information (in a format similar to @samp{ls -l}). Besides the | |
1894 | information you could list with @samp{ar tv}, @samp{objdump -a} shows | |
1895 | the object file format of each archive member. | |
1896 | ||
1897 | @item --adjust-vma=@var{offset} | |
1898 | @cindex section addresses in objdump | |
1899 | @cindex VMA in objdump | |
1900 | When dumping information, first add @var{offset} to all the section | |
1901 | addresses. This is useful if the section addresses do not correspond to | |
1902 | the symbol table, which can happen when putting sections at particular | |
1903 | addresses when using a format which can not represent section addresses, | |
1904 | such as a.out. | |
1905 | ||
1906 | @item -b @var{bfdname} | |
1907 | @itemx --target=@var{bfdname} | |
1908 | @cindex object code format | |
1909 | Specify that the object-code format for the object files is | |
1910 | @var{bfdname}. This option may not be necessary; @var{objdump} can | |
1911 | automatically recognize many formats. | |
1912 | ||
1913 | For example, | |
1914 | @example | |
1915 | objdump -b oasys -m vax -h fu.o | |
1916 | @end example | |
1917 | @noindent | |
c7c55b78 NC |
1918 | displays summary information from the section headers (@option{-h}) of |
1919 | @file{fu.o}, which is explicitly identified (@option{-m}) as a VAX object | |
252b5132 | 1920 | file in the format produced by Oasys compilers. You can list the |
c7c55b78 | 1921 | formats available with the @option{-i} option. |
252b5132 RH |
1922 | @xref{Target Selection}, for more information. |
1923 | ||
1924 | @item -C | |
28c309a2 | 1925 | @itemx --demangle[=@var{style}] |
252b5132 RH |
1926 | @cindex demangling in objdump |
1927 | Decode (@dfn{demangle}) low-level symbol names into user-level names. | |
1928 | Besides removing any initial underscore prepended by the system, this | |
28c309a2 | 1929 | makes C++ function names readable. Different compilers have different |
c1c0eb9e RM |
1930 | mangling styles. The optional demangling style argument can be used to |
1931 | choose an appropriate demangling style for your compiler. @xref{c++filt}, | |
28c309a2 | 1932 | for more information on demangling. |
252b5132 | 1933 | |
947ed062 NC |
1934 | @item -g |
1935 | @itemx --debugging | |
b922d590 NC |
1936 | Display debugging information. This attempts to parse STABS and IEEE |
1937 | debugging format information stored in the file and print it out using | |
1938 | a C like syntax. If neither of these formats are found this option | |
1939 | falls back on the @option{-W} option to print any DWARF information in | |
1940 | the file. | |
252b5132 | 1941 | |
51cdc6e0 NC |
1942 | @item -e |
1943 | @itemx --debugging-tags | |
1944 | Like @option{-g}, but the information is generated in a format compatible | |
1945 | with ctags tool. | |
1946 | ||
252b5132 RH |
1947 | @item -d |
1948 | @itemx --disassemble | |
1949 | @cindex disassembling object code | |
1950 | @cindex machine instructions | |
1951 | Display the assembler mnemonics for the machine instructions from | |
1952 | @var{objfile}. This option only disassembles those sections which are | |
1953 | expected to contain instructions. | |
1954 | ||
1955 | @item -D | |
1956 | @itemx --disassemble-all | |
c7c55b78 | 1957 | Like @option{-d}, but disassemble the contents of all sections, not just |
252b5132 RH |
1958 | those expected to contain instructions. |
1959 | ||
0313a2b8 NC |
1960 | If the target is an ARM architecture this switch also has the effect |
1961 | of forcing the disassembler to decode pieces of data found in code | |
1962 | sections as if they were instructions. | |
1963 | ||
252b5132 RH |
1964 | @item --prefix-addresses |
1965 | When disassembling, print the complete address on each line. This is | |
1966 | the older disassembly format. | |
1967 | ||
252b5132 RH |
1968 | @item -EB |
1969 | @itemx -EL | |
1970 | @itemx --endian=@{big|little@} | |
1971 | @cindex endianness | |
1972 | @cindex disassembly endianness | |
1973 | Specify the endianness of the object files. This only affects | |
1974 | disassembly. This can be useful when disassembling a file format which | |
1975 | does not describe endianness information, such as S-records. | |
1976 | ||
1977 | @item -f | |
947ed062 | 1978 | @itemx --file-headers |
252b5132 RH |
1979 | @cindex object file header |
1980 | Display summary information from the overall header of | |
1981 | each of the @var{objfile} files. | |
1982 | ||
98ec6e72 NC |
1983 | @item -F |
1984 | @itemx --file-offsets | |
1985 | @cindex object file offsets | |
1986 | When disassembling sections, whenever a symbol is displayed, also | |
1987 | display the file offset of the region of data that is about to be | |
1988 | dumped. If zeroes are being skipped, then when disassembly resumes, | |
1989 | tell the user how many zeroes were skipped and the file offset of the | |
32760852 NC |
1990 | location from where the disassembly resumes. When dumping sections, |
1991 | display the file offset of the location from where the dump starts. | |
98ec6e72 | 1992 | |
f1563258 TW |
1993 | @item --file-start-context |
1994 | @cindex source code context | |
1995 | Specify that when displaying interlisted source code/disassembly | |
c7c55b78 | 1996 | (assumes @option{-S}) from a file that has not yet been displayed, extend the |
f1563258 TW |
1997 | context to the start of the file. |
1998 | ||
252b5132 | 1999 | @item -h |
947ed062 NC |
2000 | @itemx --section-headers |
2001 | @itemx --headers | |
252b5132 RH |
2002 | @cindex section headers |
2003 | Display summary information from the section headers of the | |
2004 | object file. | |
2005 | ||
2006 | File segments may be relocated to nonstandard addresses, for example by | |
c7c55b78 NC |
2007 | using the @option{-Ttext}, @option{-Tdata}, or @option{-Tbss} options to |
2008 | @command{ld}. However, some object file formats, such as a.out, do not | |
252b5132 | 2009 | store the starting address of the file segments. In those situations, |
c7c55b78 | 2010 | although @command{ld} relocates the sections correctly, using @samp{objdump |
252b5132 RH |
2011 | -h} to list the file section headers cannot show the correct addresses. |
2012 | Instead, it shows the usual addresses, which are implicit for the | |
2013 | target. | |
2014 | ||
947ed062 NC |
2015 | @item -H |
2016 | @itemx --help | |
c7c55b78 | 2017 | Print a summary of the options to @command{objdump} and exit. |
252b5132 RH |
2018 | |
2019 | @item -i | |
2020 | @itemx --info | |
2021 | @cindex architectures available | |
2022 | @cindex object formats available | |
2023 | Display a list showing all architectures and object formats available | |
c7c55b78 | 2024 | for specification with @option{-b} or @option{-m}. |
252b5132 RH |
2025 | |
2026 | @item -j @var{name} | |
2027 | @itemx --section=@var{name} | |
2028 | @cindex section information | |
2029 | Display information only for section @var{name}. | |
2030 | ||
2031 | @item -l | |
2032 | @itemx --line-numbers | |
2033 | @cindex source filenames for object files | |
2034 | Label the display (using debugging information) with the filename and | |
2035 | source line numbers corresponding to the object code or relocs shown. | |
c7c55b78 | 2036 | Only useful with @option{-d}, @option{-D}, or @option{-r}. |
252b5132 RH |
2037 | |
2038 | @item -m @var{machine} | |
2039 | @itemx --architecture=@var{machine} | |
2040 | @cindex architecture | |
2041 | @cindex disassembly architecture | |
2042 | Specify the architecture to use when disassembling object files. This | |
2043 | can be useful when disassembling object files which do not describe | |
2044 | architecture information, such as S-records. You can list the available | |
c7c55b78 | 2045 | architectures with the @option{-i} option. |
252b5132 | 2046 | |
0313a2b8 NC |
2047 | If the target is an ARM architecture then this switch has an |
2048 | additional effect. It restricts the disassembly to only those | |
2049 | instructions supported by the architecture specified by @var{machine}. | |
2050 | If it is necessary to use this switch because the input file does not | |
2051 | contain any architecture information, but it is also desired to | |
2052 | disassemble all the instructions use @option{-marm}. | |
2053 | ||
dd92f639 NC |
2054 | @item -M @var{options} |
2055 | @itemx --disassembler-options=@var{options} | |
2056 | Pass target specific information to the disassembler. Only supported on | |
31e0f3cd NC |
2057 | some targets. If it is necessary to specify more than one |
2058 | disassembler option then multiple @option{-M} options can be used or | |
2059 | can be placed together into a comma separated list. | |
dd92f639 NC |
2060 | |
2061 | If the target is an ARM architecture then this switch can be used to | |
2062 | select which register name set is used during disassembler. Specifying | |
9c092ace | 2063 | @option{-M reg-names-std} (the default) will select the register names as |
58efb6c0 NC |
2064 | used in ARM's instruction set documentation, but with register 13 called |
2065 | 'sp', register 14 called 'lr' and register 15 called 'pc'. Specifying | |
c7c55b78 NC |
2066 | @option{-M reg-names-apcs} will select the name set used by the ARM |
2067 | Procedure Call Standard, whilst specifying @option{-M reg-names-raw} will | |
58efb6c0 NC |
2068 | just use @samp{r} followed by the register number. |
2069 | ||
2070 | There are also two variants on the APCS register naming scheme enabled | |
c7c55b78 NC |
2071 | by @option{-M reg-names-atpcs} and @option{-M reg-names-special-atpcs} which |
2072 | use the ARM/Thumb Procedure Call Standard naming conventions. (Either | |
947ed062 | 2073 | with the normal register names or the special register names). |
dd92f639 | 2074 | |
8f915f68 | 2075 | This option can also be used for ARM architectures to force the |
c36774d6 | 2076 | disassembler to interpret all instructions as Thumb instructions by |
c7c55b78 | 2077 | using the switch @option{--disassembler-options=force-thumb}. This can be |
8f915f68 NC |
2078 | useful when attempting to disassemble thumb code produced by other |
2079 | compilers. | |
2080 | ||
e396998b AM |
2081 | For the x86, some of the options duplicate functions of the @option{-m} |
2082 | switch, but allow finer grained control. Multiple selections from the | |
2083 | following may be specified as a comma separated string. | |
b89e9eae | 2084 | @option{x86-64}, @option{i386} and @option{i8086} select disassembly for |
e396998b | 2085 | the given architecture. @option{intel} and @option{att} select between |
9d141669 L |
2086 | intel syntax mode and AT&T syntax mode. |
2087 | @option{intel-mnemonic} and @option{att-mnemonic} select between | |
2088 | intel mnemonic mode and AT&T mnemonic mode. @option{intel-mnemonic} | |
2089 | implies @option{intel} and @option{att-mnemonic} implies @option{att}. | |
2090 | @option{addr64}, @option{addr32}, | |
e396998b AM |
2091 | @option{addr16}, @option{data32} and @option{data16} specify the default |
2092 | address size and operand size. These four options will be overridden if | |
b89e9eae | 2093 | @option{x86-64}, @option{i386} or @option{i8086} appear later in the |
e396998b | 2094 | option string. Lastly, @option{suffix}, when in AT&T mode, |
b9e5d8e5 | 2095 | instructs the disassembler to print a mnemonic suffix even when the |
e396998b AM |
2096 | suffix could be inferred by the operands. |
2097 | ||
2f3bb96a BE |
2098 | For PowerPC, @option{booke} controls the disassembly of BookE |
2099 | instructions. @option{32} and @option{64} select PowerPC and | |
2100 | PowerPC64 disassembly, respectively. @option{e300} selects | |
2101 | disassembly for the e300 family. @option{440} selects disassembly for | |
2102 | the PowerPC 440. @option{ppcps} selects disassembly for the paired | |
2103 | single instructions of the PPC750CL. | |
802a735e | 2104 | |
b45619c0 | 2105 | For MIPS, this option controls the printing of instruction mnemonic |
e39893d7 FF |
2106 | names and register names in disassembled instructions. Multiple |
2107 | selections from the following may be specified as a comma separated | |
2108 | string, and invalid options are ignored: | |
640c0ccd CD |
2109 | |
2110 | @table @code | |
e39893d7 | 2111 | @item no-aliases |
b45619c0 NC |
2112 | Print the 'raw' instruction mnemonic instead of some pseudo |
2113 | instruction mnemonic. I.e., print 'daddu' or 'or' instead of 'move', | |
e39893d7 FF |
2114 | 'sll' instead of 'nop', etc. |
2115 | ||
640c0ccd CD |
2116 | @item gpr-names=@var{ABI} |
2117 | Print GPR (general-purpose register) names as appropriate | |
2118 | for the specified ABI. By default, GPR names are selected according to | |
2119 | the ABI of the binary being disassembled. | |
2120 | ||
2121 | @item fpr-names=@var{ABI} | |
2122 | Print FPR (floating-point register) names as | |
2123 | appropriate for the specified ABI. By default, FPR numbers are printed | |
2124 | rather than names. | |
2125 | ||
2126 | @item cp0-names=@var{ARCH} | |
2127 | Print CP0 (system control coprocessor; coprocessor 0) register names | |
2128 | as appropriate for the CPU or architecture specified by | |
2129 | @var{ARCH}. By default, CP0 register names are selected according to | |
2130 | the architecture and CPU of the binary being disassembled. | |
2131 | ||
af7ee8bf CD |
2132 | @item hwr-names=@var{ARCH} |
2133 | Print HWR (hardware register, used by the @code{rdhwr} instruction) names | |
2134 | as appropriate for the CPU or architecture specified by | |
2135 | @var{ARCH}. By default, HWR names are selected according to | |
2136 | the architecture and CPU of the binary being disassembled. | |
2137 | ||
640c0ccd CD |
2138 | @item reg-names=@var{ABI} |
2139 | Print GPR and FPR names as appropriate for the selected ABI. | |
2140 | ||
2141 | @item reg-names=@var{ARCH} | |
af7ee8bf CD |
2142 | Print CPU-specific register names (CP0 register and HWR names) |
2143 | as appropriate for the selected CPU or architecture. | |
640c0ccd CD |
2144 | @end table |
2145 | ||
2146 | For any of the options listed above, @var{ABI} or | |
2147 | @var{ARCH} may be specified as @samp{numeric} to have numbers printed | |
2148 | rather than names, for the selected types of registers. | |
2149 | You can list the available values of @var{ABI} and @var{ARCH} using | |
2150 | the @option{--help} option. | |
2151 | ||
ec72cfe5 NC |
2152 | For VAX, you can specify function entry addresses with @option{-M |
2153 | entry:0xf00ba}. You can use this multiple times to properly | |
2154 | disassemble VAX binary files that don't contain symbol tables (like | |
2155 | ROM dumps). In these cases, the function entry mask would otherwise | |
b45619c0 | 2156 | be decoded as VAX instructions, which would probably lead the rest |
ec72cfe5 NC |
2157 | of the function being wrongly disassembled. |
2158 | ||
252b5132 RH |
2159 | @item -p |
2160 | @itemx --private-headers | |
2161 | Print information that is specific to the object file format. The exact | |
2162 | information printed depends upon the object file format. For some | |
2163 | object file formats, no additional information is printed. | |
2164 | ||
6abcee90 TG |
2165 | @item -P @var{options} |
2166 | @itemx --private=@var{options} | |
2167 | Print information that is specific to the object file format. The | |
2168 | argument @var{options} is a comma separated list that depends on the | |
2169 | format (the lists of options is displayed with the help). | |
2170 | ||
2171 | For XCOFF, the available options are: @option{header}, @option{aout}, | |
2172 | @option{sections}, @option{syms}, @option{relocs}, @option{lineno}, | |
2173 | @option{loader}, @option{except}, @option{typchk}, @option{traceback} | |
2174 | and @option{toc}. | |
2175 | ||
252b5132 RH |
2176 | @item -r |
2177 | @itemx --reloc | |
2178 | @cindex relocation entries, in object file | |
c7c55b78 NC |
2179 | Print the relocation entries of the file. If used with @option{-d} or |
2180 | @option{-D}, the relocations are printed interspersed with the | |
252b5132 RH |
2181 | disassembly. |
2182 | ||
2183 | @item -R | |
2184 | @itemx --dynamic-reloc | |
2185 | @cindex dynamic relocation entries, in object file | |
2186 | Print the dynamic relocation entries of the file. This is only | |
2187 | meaningful for dynamic objects, such as certain types of shared | |
840b96a7 AM |
2188 | libraries. As for @option{-r}, if used with @option{-d} or |
2189 | @option{-D}, the relocations are printed interspersed with the | |
2190 | disassembly. | |
252b5132 RH |
2191 | |
2192 | @item -s | |
2193 | @itemx --full-contents | |
2194 | @cindex sections, full contents | |
2195 | @cindex object file sections | |
155e0d23 NC |
2196 | Display the full contents of any sections requested. By default all |
2197 | non-empty sections are displayed. | |
252b5132 RH |
2198 | |
2199 | @item -S | |
2200 | @itemx --source | |
2201 | @cindex source disassembly | |
2202 | @cindex disassembly, with source | |
2203 | Display source code intermixed with disassembly, if possible. Implies | |
c7c55b78 | 2204 | @option{-d}. |
252b5132 | 2205 | |
0dafdf3f L |
2206 | @item --prefix=@var{prefix} |
2207 | @cindex Add prefix to absolute paths | |
2208 | Specify @var{prefix} to add to the absolute paths when used with | |
b3364cb9 | 2209 | @option{-S}. |
0dafdf3f L |
2210 | |
2211 | @item --prefix-strip=@var{level} | |
2212 | @cindex Strip absolute paths | |
2213 | Indicate how many initial directory names to strip off the hardwired | |
2214 | absolute paths. It has no effect without @option{--prefix=}@var{prefix}. | |
2215 | ||
252b5132 RH |
2216 | @item --show-raw-insn |
2217 | When disassembling instructions, print the instruction in hex as well as | |
2218 | in symbolic form. This is the default except when | |
c7c55b78 | 2219 | @option{--prefix-addresses} is used. |
252b5132 RH |
2220 | |
2221 | @item --no-show-raw-insn | |
2222 | When disassembling instructions, do not print the instruction bytes. | |
c7c55b78 | 2223 | This is the default when @option{--prefix-addresses} is used. |
252b5132 | 2224 | |
3dcb3fcb | 2225 | @item --insn-width=@var{width} |
b3364cb9 | 2226 | @cindex Instruction width |
3dcb3fcb L |
2227 | Display @var{width} bytes on a single line when disassembling |
2228 | instructions. | |
2229 | ||
f9f0e732 | 2230 | @item -W[lLiaprmfFsoRt] |
5bbdf3d5 | 2231 | @itemx --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index] |
4de2ad99 L |
2232 | @cindex DWARF |
2233 | @cindex debug symbols | |
4cb93e3b TG |
2234 | Displays the contents of the debug sections in the file, if any are |
2235 | present. If one of the optional letters or words follows the switch | |
2236 | then only data found in those specific sections will be dumped. | |
4de2ad99 | 2237 | |
6f875884 | 2238 | Note that there is no single letter option to display the content of |
5bbdf3d5 | 2239 | trace sections or .gdb_index. |
6f875884 | 2240 | |
fd2f0033 | 2241 | Note: the output from the @option{=info} option can also be affected |
4723351a CC |
2242 | by the options @option{--dwarf-depth}, the @option{--dwarf-start} and |
2243 | the @option{--dwarf-check}. | |
fd2f0033 TT |
2244 | |
2245 | @item --dwarf-depth=@var{n} | |
2246 | Limit the dump of the @code{.debug_info} section to @var{n} children. | |
2247 | This is only useful with @option{--dwarf=info}. The default is | |
2248 | to print all DIEs; the special value 0 for @var{n} will also have this | |
2249 | effect. | |
2250 | ||
2251 | With a non-zero value for @var{n}, DIEs at or deeper than @var{n} | |
2252 | levels will not be printed. The range for @var{n} is zero-based. | |
2253 | ||
2254 | @item --dwarf-start=@var{n} | |
2255 | Print only DIEs beginning with the DIE numbered @var{n}. This is only | |
2256 | useful with @option{--dwarf=info}. | |
2257 | ||
2258 | If specified, this option will suppress printing of any header | |
2259 | information and all DIEs before the DIE numbered @var{n}. Only | |
2260 | siblings and children of the specified DIE will be printed. | |
2261 | ||
2262 | This can be used in conjunction with @option{--dwarf-depth}. | |
2263 | ||
4723351a CC |
2264 | @item --dwarf-check |
2265 | Enable additional checks for consistency of Dwarf information. | |
2266 | ||
1dada9c5 | 2267 | @item -G |
947ed062 | 2268 | @itemx --stabs |
252b5132 RH |
2269 | @cindex stab |
2270 | @cindex .stab | |
2271 | @cindex debug symbols | |
2272 | @cindex ELF object file format | |
2273 | Display the full contents of any sections requested. Display the | |
2274 | contents of the .stab and .stab.index and .stab.excl sections from an | |
2275 | ELF file. This is only useful on systems (such as Solaris 2.0) in which | |
2276 | @code{.stab} debugging symbol-table entries are carried in an ELF | |
2277 | section. In most other file formats, debugging symbol-table entries are | |
c7c55b78 | 2278 | interleaved with linkage symbols, and are visible in the @option{--syms} |
0285c67d NC |
2279 | output. |
2280 | @ifclear man | |
2281 | For more information on stabs symbols, see @ref{Top,Stabs,Stabs | |
252b5132 | 2282 | Overview,stabs.info, The ``stabs'' debug format}. |
0285c67d | 2283 | @end ifclear |
252b5132 RH |
2284 | |
2285 | @item --start-address=@var{address} | |
2286 | @cindex start-address | |
2287 | Start displaying data at the specified address. This affects the output | |
c7c55b78 | 2288 | of the @option{-d}, @option{-r} and @option{-s} options. |
252b5132 RH |
2289 | |
2290 | @item --stop-address=@var{address} | |
2291 | @cindex stop-address | |
2292 | Stop displaying data at the specified address. This affects the output | |
c7c55b78 | 2293 | of the @option{-d}, @option{-r} and @option{-s} options. |
252b5132 RH |
2294 | |
2295 | @item -t | |
2296 | @itemx --syms | |
2297 | @cindex symbol table entries, printing | |
2298 | Print the symbol table entries of the file. | |
a1039809 NC |
2299 | This is similar to the information provided by the @samp{nm} program, |
2300 | although the display format is different. The format of the output | |
2301 | depends upon the format of the file being dumped, but there are two main | |
2302 | types. One looks like this: | |
2303 | ||
2304 | @smallexample | |
2305 | [ 4](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .bss | |
2306 | [ 6](sec 1)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 fred | |
2307 | @end smallexample | |
2308 | ||
2309 | where the number inside the square brackets is the number of the entry | |
2310 | in the symbol table, the @var{sec} number is the section number, the | |
2311 | @var{fl} value are the symbol's flag bits, the @var{ty} number is the | |
2312 | symbol's type, the @var{scl} number is the symbol's storage class and | |
2313 | the @var{nx} value is the number of auxilary entries associated with | |
2314 | the symbol. The last two fields are the symbol's value and its name. | |
2315 | ||
2316 | The other common output format, usually seen with ELF based files, | |
2317 | looks like this: | |
2318 | ||
2319 | @smallexample | |
2320 | 00000000 l d .bss 00000000 .bss | |
2321 | 00000000 g .text 00000000 fred | |
2322 | @end smallexample | |
2323 | ||
2324 | Here the first number is the symbol's value (sometimes refered to as | |
2325 | its address). The next field is actually a set of characters and | |
2326 | spaces indicating the flag bits that are set on the symbol. These | |
af3e16d9 NC |
2327 | characters are described below. Next is the section with which the |
2328 | symbol is associated or @emph{*ABS*} if the section is absolute (ie | |
2329 | not connected with any section), or @emph{*UND*} if the section is | |
2330 | referenced in the file being dumped, but not defined there. | |
2331 | ||
2332 | After the section name comes another field, a number, which for common | |
2333 | symbols is the alignment and for other symbol is the size. Finally | |
2334 | the symbol's name is displayed. | |
a1039809 NC |
2335 | |
2336 | The flag characters are divided into 7 groups as follows: | |
2337 | @table @code | |
2338 | @item l | |
2339 | @itemx g | |
3e7a7d11 | 2340 | @itemx u |
a1039809 | 2341 | @itemx ! |
3e7a7d11 NC |
2342 | The symbol is a local (l), global (g), unique global (u), neither |
2343 | global nor local (a space) or both global and local (!). A | |
928a4139 | 2344 | symbol can be neither local or global for a variety of reasons, e.g., |
a1039809 | 2345 | because it is used for debugging, but it is probably an indication of |
3e7a7d11 NC |
2346 | a bug if it is ever both local and global. Unique global symbols are |
2347 | a GNU extension to the standard set of ELF symbol bindings. For such | |
2348 | a symbol the dynamic linker will make sure that in the entire process | |
2349 | there is just one symbol with this name and type in use. | |
a1039809 NC |
2350 | |
2351 | @item w | |
2352 | The symbol is weak (w) or strong (a space). | |
2353 | ||
2354 | @item C | |
2355 | The symbol denotes a constructor (C) or an ordinary symbol (a space). | |
2356 | ||
2357 | @item W | |
2358 | The symbol is a warning (W) or a normal symbol (a space). A warning | |
2359 | symbol's name is a message to be displayed if the symbol following the | |
2360 | warning symbol is ever referenced. | |
2361 | ||
2362 | @item I | |
171191ba NC |
2363 | @item i |
2364 | The symbol is an indirect reference to another symbol (I), a function | |
2365 | to be evaluated during reloc processing (i) or a normal symbol (a | |
2366 | space). | |
a1039809 NC |
2367 | |
2368 | @item d | |
2369 | @itemx D | |
2370 | The symbol is a debugging symbol (d) or a dynamic symbol (D) or a | |
2371 | normal symbol (a space). | |
2372 | ||
2373 | @item F | |
2374 | @item f | |
2375 | @item O | |
af3e16d9 | 2376 | The symbol is the name of a function (F) or a file (f) or an object |
a1039809 NC |
2377 | (O) or just a normal symbol (a space). |
2378 | @end table | |
252b5132 RH |
2379 | |
2380 | @item -T | |
2381 | @itemx --dynamic-syms | |
2382 | @cindex dynamic symbol table entries, printing | |
2383 | Print the dynamic symbol table entries of the file. This is only | |
2384 | meaningful for dynamic objects, such as certain types of shared | |
2385 | libraries. This is similar to the information provided by the @samp{nm} | |
c7c55b78 | 2386 | program when given the @option{-D} (@option{--dynamic}) option. |
252b5132 | 2387 | |
3c9458e9 NC |
2388 | @item --special-syms |
2389 | When displaying symbols include those which the target considers to be | |
2390 | special in some way and which would not normally be of interest to the | |
2391 | user. | |
2392 | ||
947ed062 NC |
2393 | @item -V |
2394 | @itemx --version | |
c7c55b78 | 2395 | Print the version number of @command{objdump} and exit. |
252b5132 RH |
2396 | |
2397 | @item -x | |
947ed062 | 2398 | @itemx --all-headers |
252b5132 RH |
2399 | @cindex all header information, object file |
2400 | @cindex header information, all | |
2401 | Display all available header information, including the symbol table and | |
c7c55b78 | 2402 | relocation entries. Using @option{-x} is equivalent to specifying all of |
04c34128 | 2403 | @option{-a -f -h -p -r -t}. |
252b5132 RH |
2404 | |
2405 | @item -w | |
2406 | @itemx --wide | |
2407 | @cindex wide output, printing | |
2408 | Format some lines for output devices that have more than 80 columns. | |
31104126 | 2409 | Also do not truncate symbol names when they are displayed. |
aefbdd67 BE |
2410 | |
2411 | @item -z | |
2c0c15f9 | 2412 | @itemx --disassemble-zeroes |
aefbdd67 BE |
2413 | Normally the disassembly output will skip blocks of zeroes. This |
2414 | option directs the disassembler to disassemble those blocks, just like | |
2415 | any other data. | |
252b5132 RH |
2416 | @end table |
2417 | ||
0285c67d NC |
2418 | @c man end |
2419 | ||
2420 | @ignore | |
2421 | @c man begin SEEALSO objdump | |
2422 | nm(1), readelf(1), and the Info entries for @file{binutils}. | |
2423 | @c man end | |
2424 | @end ignore | |
2425 | ||
252b5132 RH |
2426 | @node ranlib |
2427 | @chapter ranlib | |
2428 | ||
2429 | @kindex ranlib | |
2430 | @cindex archive contents | |
2431 | @cindex symbol index | |
2432 | ||
0285c67d NC |
2433 | @c man title ranlib generate index to archive. |
2434 | ||
252b5132 | 2435 | @smallexample |
0285c67d | 2436 | @c man begin SYNOPSIS ranlib |
36e32b27 | 2437 | ranlib [@option{--plugin} @var{name}] [@option{-DhHvVt}] @var{archive} |
0285c67d | 2438 | @c man end |
252b5132 RH |
2439 | @end smallexample |
2440 | ||
0285c67d NC |
2441 | @c man begin DESCRIPTION ranlib |
2442 | ||
c7c55b78 | 2443 | @command{ranlib} generates an index to the contents of an archive and |
252b5132 | 2444 | stores it in the archive. The index lists each symbol defined by a |
c1c0eb9e | 2445 | member of an archive that is a relocatable object file. |
252b5132 RH |
2446 | |
2447 | You may use @samp{nm -s} or @samp{nm --print-armap} to list this index. | |
2448 | ||
2449 | An archive with such an index speeds up linking to the library and | |
2450 | allows routines in the library to call each other without regard to | |
2451 | their placement in the archive. | |
2452 | ||
c7c55b78 NC |
2453 | The @sc{gnu} @command{ranlib} program is another form of @sc{gnu} @command{ar}; running |
2454 | @command{ranlib} is completely equivalent to executing @samp{ar -s}. | |
252b5132 RH |
2455 | @xref{ar}. |
2456 | ||
0285c67d NC |
2457 | @c man end |
2458 | ||
2459 | @c man begin OPTIONS ranlib | |
2460 | ||
c7c55b78 | 2461 | @table @env |
b3364cb9 RM |
2462 | @item -h |
2463 | @itemx -H | |
2464 | @itemx --help | |
2465 | Show usage information for @command{ranlib}. | |
2466 | ||
252b5132 RH |
2467 | @item -v |
2468 | @itemx -V | |
f20a759a | 2469 | @itemx --version |
c7c55b78 | 2470 | Show the version number of @command{ranlib}. |
b14f9da0 | 2471 | |
b3364cb9 RM |
2472 | @item -D |
2473 | @cindex deterministic archives | |
9cb80f72 | 2474 | @kindex --enable-deterministic-archives |
b3364cb9 RM |
2475 | Operate in @emph{deterministic} mode. The symbol map archive member's |
2476 | header will show zero for the UID, GID, and timestamp. When this | |
2477 | option is used, multiple runs will produce identical output files. | |
2478 | ||
9cb80f72 RM |
2479 | This is the default unless @file{binutils} was configured with |
2480 | @option{--enable-deterministic-archives}. | |
2481 | ||
b14f9da0 NC |
2482 | @item -t |
2483 | Update the timestamp of the symbol map of an archive. | |
9cb80f72 RM |
2484 | |
2485 | @item -U | |
2486 | @cindex deterministic archives | |
2487 | @kindex --enable-deterministic-archives | |
2488 | Do @emph{not} operate in @emph{deterministic} mode. This is the | |
2489 | inverse of the @samp{-D} option, above: the archive index will get | |
2490 | actual UID, GID, timestamp, and file mode values. | |
2491 | ||
2492 | This is the default unless @file{binutils} was configured with | |
2493 | @option{--enable-deterministic-archives}. | |
252b5132 RH |
2494 | @end table |
2495 | ||
0285c67d NC |
2496 | @c man end |
2497 | ||
2498 | @ignore | |
2499 | @c man begin SEEALSO ranlib | |
2500 | ar(1), nm(1), and the Info entries for @file{binutils}. | |
2501 | @c man end | |
2502 | @end ignore | |
2503 | ||
252b5132 RH |
2504 | @node size |
2505 | @chapter size | |
2506 | ||
2507 | @kindex size | |
2508 | @cindex section sizes | |
2509 | ||
0285c67d NC |
2510 | @c man title size list section sizes and total size. |
2511 | ||
252b5132 | 2512 | @smallexample |
0285c67d | 2513 | @c man begin SYNOPSIS size |
c7c55b78 | 2514 | size [@option{-A}|@option{-B}|@option{--format=}@var{compatibility}] |
15c82623 NC |
2515 | [@option{--help}] |
2516 | [@option{-d}|@option{-o}|@option{-x}|@option{--radix=}@var{number}] | |
29422971 | 2517 | [@option{--common}] |
15c82623 | 2518 | [@option{-t}|@option{--totals}] |
c1c0eb9e | 2519 | [@option{--target=}@var{bfdname}] [@option{-V}|@option{--version}] |
c7c55b78 | 2520 | [@var{objfile}@dots{}] |
0285c67d | 2521 | @c man end |
252b5132 RH |
2522 | @end smallexample |
2523 | ||
0285c67d NC |
2524 | @c man begin DESCRIPTION size |
2525 | ||
c7c55b78 | 2526 | The @sc{gnu} @command{size} utility lists the section sizes---and the total |
252b5132 RH |
2527 | size---for each of the object or archive files @var{objfile} in its |
2528 | argument list. By default, one line of output is generated for each | |
2529 | object file or each module in an archive. | |
2530 | ||
2531 | @var{objfile}@dots{} are the object files to be examined. | |
2532 | If none are specified, the file @code{a.out} will be used. | |
2533 | ||
0285c67d NC |
2534 | @c man end |
2535 | ||
2536 | @c man begin OPTIONS size | |
2537 | ||
252b5132 RH |
2538 | The command line options have the following meanings: |
2539 | ||
c7c55b78 | 2540 | @table @env |
252b5132 RH |
2541 | @item -A |
2542 | @itemx -B | |
2543 | @itemx --format=@var{compatibility} | |
c7c55b78 | 2544 | @cindex @command{size} display format |
252b5132 | 2545 | Using one of these options, you can choose whether the output from @sc{gnu} |
c7c55b78 NC |
2546 | @command{size} resembles output from System V @command{size} (using @option{-A}, |
2547 | or @option{--format=sysv}), or Berkeley @command{size} (using @option{-B}, or | |
2548 | @option{--format=berkeley}). The default is the one-line format similar to | |
c1c0eb9e | 2549 | Berkeley's. |
252b5132 RH |
2550 | @c Bonus for doc-source readers: you can also say --format=strange (or |
2551 | @c anything else that starts with 's') for sysv, and --format=boring (or | |
2552 | @c anything else that starts with 'b') for Berkeley. | |
2553 | ||
2554 | Here is an example of the Berkeley (default) format of output from | |
c1c0eb9e | 2555 | @command{size}: |
252b5132 | 2556 | @smallexample |
f20a759a | 2557 | $ size --format=Berkeley ranlib size |
252b5132 RH |
2558 | text data bss dec hex filename |
2559 | 294880 81920 11592 388392 5ed28 ranlib | |
2560 | 294880 81920 11888 388688 5ee50 size | |
2561 | @end smallexample | |
2562 | ||
2563 | @noindent | |
2564 | This is the same data, but displayed closer to System V conventions: | |
2565 | ||
2566 | @smallexample | |
f20a759a | 2567 | $ size --format=SysV ranlib size |
252b5132 RH |
2568 | ranlib : |
2569 | section size addr | |
c1c0eb9e RM |
2570 | .text 294880 8192 |
2571 | .data 81920 303104 | |
2572 | .bss 11592 385024 | |
2573 | Total 388392 | |
252b5132 RH |
2574 | |
2575 | ||
2576 | size : | |
2577 | section size addr | |
c1c0eb9e RM |
2578 | .text 294880 8192 |
2579 | .data 81920 303104 | |
2580 | .bss 11888 385024 | |
2581 | Total 388688 | |
252b5132 RH |
2582 | @end smallexample |
2583 | ||
2584 | @item --help | |
2585 | Show a summary of acceptable arguments and options. | |
2586 | ||
2587 | @item -d | |
2588 | @itemx -o | |
2589 | @itemx -x | |
2590 | @itemx --radix=@var{number} | |
c7c55b78 | 2591 | @cindex @command{size} number format |
252b5132 RH |
2592 | @cindex radix for section sizes |
2593 | Using one of these options, you can control whether the size of each | |
c7c55b78 NC |
2594 | section is given in decimal (@option{-d}, or @option{--radix=10}); octal |
2595 | (@option{-o}, or @option{--radix=8}); or hexadecimal (@option{-x}, or | |
2596 | @option{--radix=16}). In @option{--radix=@var{number}}, only the three | |
252b5132 | 2597 | values (8, 10, 16) are supported. The total size is always given in two |
c7c55b78 NC |
2598 | radices; decimal and hexadecimal for @option{-d} or @option{-x} output, or |
2599 | octal and hexadecimal if you're using @option{-o}. | |
252b5132 | 2600 | |
29422971 AM |
2601 | @item --common |
2602 | Print total size of common symbols in each file. When using Berkeley | |
2603 | format these are included in the bss size. | |
2604 | ||
15c82623 NC |
2605 | @item -t |
2606 | @itemx --totals | |
2607 | Show totals of all objects listed (Berkeley format listing mode only). | |
2608 | ||
252b5132 RH |
2609 | @item --target=@var{bfdname} |
2610 | @cindex object code format | |
2611 | Specify that the object-code format for @var{objfile} is | |
c7c55b78 | 2612 | @var{bfdname}. This option may not be necessary; @command{size} can |
252b5132 RH |
2613 | automatically recognize many formats. |
2614 | @xref{Target Selection}, for more information. | |
2615 | ||
2616 | @item -V | |
2617 | @itemx --version | |
c7c55b78 | 2618 | Display the version number of @command{size}. |
252b5132 RH |
2619 | @end table |
2620 | ||
0285c67d NC |
2621 | @c man end |
2622 | ||
2623 | @ignore | |
2624 | @c man begin SEEALSO size | |
2625 | ar(1), objdump(1), readelf(1), and the Info entries for @file{binutils}. | |
2626 | @c man end | |
2627 | @end ignore | |
2628 | ||
252b5132 RH |
2629 | @node strings |
2630 | @chapter strings | |
2631 | @kindex strings | |
2632 | @cindex listings strings | |
2633 | @cindex printing strings | |
2634 | @cindex strings, printing | |
2635 | ||
0285c67d NC |
2636 | @c man title strings print the strings of printable characters in files. |
2637 | ||
252b5132 | 2638 | @smallexample |
0285c67d | 2639 | @c man begin SYNOPSIS strings |
ffbe5983 | 2640 | strings [@option{-afovV}] [@option{-}@var{min-len}] |
d132876a NC |
2641 | [@option{-n} @var{min-len}] [@option{--bytes=}@var{min-len}] |
2642 | [@option{-t} @var{radix}] [@option{--radix=}@var{radix}] | |
2643 | [@option{-e} @var{encoding}] [@option{--encoding=}@var{encoding}] | |
2644 | [@option{-}] [@option{--all}] [@option{--print-file-name}] | |
3bf31ec9 | 2645 | [@option{-T} @var{bfdname}] [@option{--target=}@var{bfdname}] |
c7c55b78 | 2646 | [@option{--help}] [@option{--version}] @var{file}@dots{} |
0285c67d | 2647 | @c man end |
252b5132 RH |
2648 | @end smallexample |
2649 | ||
0285c67d NC |
2650 | @c man begin DESCRIPTION strings |
2651 | ||
c7c55b78 | 2652 | For each @var{file} given, @sc{gnu} @command{strings} prints the printable |
252b5132 RH |
2653 | character sequences that are at least 4 characters long (or the number |
2654 | given with the options below) and are followed by an unprintable | |
2655 | character. By default, it only prints the strings from the initialized | |
2656 | and loaded sections of object files; for other types of files, it prints | |
2657 | the strings from the whole file. | |
2658 | ||
c7c55b78 | 2659 | @command{strings} is mainly useful for determining the contents of non-text |
252b5132 RH |
2660 | files. |
2661 | ||
0285c67d NC |
2662 | @c man end |
2663 | ||
2664 | @c man begin OPTIONS strings | |
2665 | ||
c7c55b78 | 2666 | @table @env |
252b5132 RH |
2667 | @item -a |
2668 | @itemx --all | |
2669 | @itemx - | |
2670 | Do not scan only the initialized and loaded sections of object files; | |
2671 | scan the whole files. | |
2672 | ||
2673 | @item -f | |
2674 | @itemx --print-file-name | |
2675 | Print the name of the file before each string. | |
2676 | ||
2677 | @item --help | |
2678 | Print a summary of the program usage on the standard output and exit. | |
2679 | ||
2680 | @item -@var{min-len} | |
2681 | @itemx -n @var{min-len} | |
2682 | @itemx --bytes=@var{min-len} | |
2683 | Print sequences of characters that are at least @var{min-len} characters | |
2684 | long, instead of the default 4. | |
2685 | ||
2686 | @item -o | |
c7c55b78 | 2687 | Like @samp{-t o}. Some other versions of @command{strings} have @option{-o} |
252b5132 RH |
2688 | act like @samp{-t d} instead. Since we can not be compatible with both |
2689 | ways, we simply chose one. | |
2690 | ||
2691 | @item -t @var{radix} | |
2692 | @itemx --radix=@var{radix} | |
2693 | Print the offset within the file before each string. The single | |
2694 | character argument specifies the radix of the offset---@samp{o} for | |
2695 | octal, @samp{x} for hexadecimal, or @samp{d} for decimal. | |
2696 | ||
d132876a NC |
2697 | @item -e @var{encoding} |
2698 | @itemx --encoding=@var{encoding} | |
2699 | Select the character encoding of the strings that are to be found. | |
8745eafa NC |
2700 | Possible values for @var{encoding} are: @samp{s} = single-7-bit-byte |
2701 | characters (ASCII, ISO 8859, etc., default), @samp{S} = | |
2702 | single-8-bit-byte characters, @samp{b} = 16-bit bigendian, @samp{l} = | |
2703 | 16-bit littleendian, @samp{B} = 32-bit bigendian, @samp{L} = 32-bit | |
830bf75c NC |
2704 | littleendian. Useful for finding wide character strings. (@samp{l} |
2705 | and @samp{b} apply to, for example, Unicode UTF-16/UCS-2 encodings). | |
d132876a | 2706 | |
3bf31ec9 NC |
2707 | @item -T @var{bfdname} |
2708 | @itemx --target=@var{bfdname} | |
252b5132 RH |
2709 | @cindex object code format |
2710 | Specify an object code format other than your system's default format. | |
2711 | @xref{Target Selection}, for more information. | |
2712 | ||
2713 | @item -v | |
ffbe5983 | 2714 | @itemx -V |
252b5132 RH |
2715 | @itemx --version |
2716 | Print the program version number on the standard output and exit. | |
2717 | @end table | |
2718 | ||
0285c67d NC |
2719 | @c man end |
2720 | ||
2721 | @ignore | |
2722 | @c man begin SEEALSO strings | |
2723 | ar(1), nm(1), objdump(1), ranlib(1), readelf(1) | |
2724 | and the Info entries for @file{binutils}. | |
2725 | @c man end | |
2726 | @end ignore | |
2727 | ||
252b5132 RH |
2728 | @node strip |
2729 | @chapter strip | |
2730 | ||
2731 | @kindex strip | |
2732 | @cindex removing symbols | |
2733 | @cindex discarding symbols | |
2734 | @cindex symbols, discarding | |
2735 | ||
0285c67d NC |
2736 | @c man title strip Discard symbols from object files. |
2737 | ||
252b5132 | 2738 | @smallexample |
0285c67d | 2739 | @c man begin SYNOPSIS strip |
2593f09a NC |
2740 | strip [@option{-F} @var{bfdname} |@option{--target=}@var{bfdname}] |
2741 | [@option{-I} @var{bfdname} |@option{--input-target=}@var{bfdname}] | |
2742 | [@option{-O} @var{bfdname} |@option{--output-target=}@var{bfdname}] | |
2743 | [@option{-s}|@option{--strip-all}] | |
2744 | [@option{-S}|@option{-g}|@option{-d}|@option{--strip-debug}] | |
96109726 | 2745 | [@option{--strip-dwo}] |
2593f09a NC |
2746 | [@option{-K} @var{symbolname} |@option{--keep-symbol=}@var{symbolname}] |
2747 | [@option{-N} @var{symbolname} |@option{--strip-symbol=}@var{symbolname}] | |
5fe11841 | 2748 | [@option{-w}|@option{--wildcard}] |
2593f09a NC |
2749 | [@option{-x}|@option{--discard-all}] [@option{-X} |@option{--discard-locals}] |
2750 | [@option{-R} @var{sectionname} |@option{--remove-section=}@var{sectionname}] | |
2751 | [@option{-o} @var{file}] [@option{-p}|@option{--preserve-dates}] | |
2e30cb57 | 2752 | [@option{-D}|@option{--enable-deterministic-archives}] |
955d0b3b | 2753 | [@option{-U}|@option{--disable-deterministic-archives}] |
1637cd90 | 2754 | [@option{--keep-file-symbols}] |
ed1653a7 | 2755 | [@option{--only-keep-debug}] |
7c29036b NC |
2756 | [@option{-v} |@option{--verbose}] [@option{-V}|@option{--version}] |
2757 | [@option{--help}] [@option{--info}] | |
252b5132 | 2758 | @var{objfile}@dots{} |
0285c67d | 2759 | @c man end |
252b5132 RH |
2760 | @end smallexample |
2761 | ||
0285c67d NC |
2762 | @c man begin DESCRIPTION strip |
2763 | ||
c7c55b78 | 2764 | @sc{gnu} @command{strip} discards all symbols from object files |
252b5132 RH |
2765 | @var{objfile}. The list of object files may include archives. |
2766 | At least one object file must be given. | |
2767 | ||
c7c55b78 | 2768 | @command{strip} modifies the files named in its argument, |
252b5132 RH |
2769 | rather than writing modified copies under different names. |
2770 | ||
0285c67d NC |
2771 | @c man end |
2772 | ||
2773 | @c man begin OPTIONS strip | |
2774 | ||
c7c55b78 | 2775 | @table @env |
252b5132 RH |
2776 | @item -F @var{bfdname} |
2777 | @itemx --target=@var{bfdname} | |
2778 | Treat the original @var{objfile} as a file with the object | |
2779 | code format @var{bfdname}, and rewrite it in the same format. | |
2780 | @xref{Target Selection}, for more information. | |
2781 | ||
2782 | @item --help | |
c7c55b78 | 2783 | Show a summary of the options to @command{strip} and exit. |
252b5132 | 2784 | |
7c29036b NC |
2785 | @item --info |
2786 | Display a list showing all architectures and object formats available. | |
2787 | ||
947ed062 | 2788 | @item -I @var{bfdname} |
252b5132 RH |
2789 | @itemx --input-target=@var{bfdname} |
2790 | Treat the original @var{objfile} as a file with the object | |
2791 | code format @var{bfdname}. | |
2792 | @xref{Target Selection}, for more information. | |
2793 | ||
2794 | @item -O @var{bfdname} | |
2795 | @itemx --output-target=@var{bfdname} | |
2796 | Replace @var{objfile} with a file in the output format @var{bfdname}. | |
2797 | @xref{Target Selection}, for more information. | |
2798 | ||
2799 | @item -R @var{sectionname} | |
2800 | @itemx --remove-section=@var{sectionname} | |
2801 | Remove any section named @var{sectionname} from the output file. This | |
2802 | option may be given more than once. Note that using this option | |
2e62b721 NC |
2803 | inappropriately may make the output file unusable. The wildcard |
2804 | character @samp{*} may be given at the end of @var{sectionname}. If | |
2805 | so, then any section starting with @var{sectionname} will be removed. | |
252b5132 RH |
2806 | |
2807 | @item -s | |
2808 | @itemx --strip-all | |
2809 | Remove all symbols. | |
2810 | ||
2811 | @item -g | |
2812 | @itemx -S | |
15c82623 | 2813 | @itemx -d |
252b5132 RH |
2814 | @itemx --strip-debug |
2815 | Remove debugging symbols only. | |
96109726 CC |
2816 | |
2817 | @item --strip-dwo | |
2818 | Remove the contents of all DWARF .dwo sections, leaving the | |
2819 | remaining debugging sections and all symbols intact. | |
2820 | See the description of this option in the @command{objcopy} section | |
2821 | for more information. | |
252b5132 RH |
2822 | |
2823 | @item --strip-unneeded | |
2824 | Remove all symbols that are not needed for relocation processing. | |
2825 | ||
2826 | @item -K @var{symbolname} | |
2827 | @itemx --keep-symbol=@var{symbolname} | |
e7f918ad NC |
2828 | When stripping symbols, keep symbol @var{symbolname} even if it would |
2829 | normally be stripped. This option may be given more than once. | |
252b5132 RH |
2830 | |
2831 | @item -N @var{symbolname} | |
2832 | @itemx --strip-symbol=@var{symbolname} | |
2833 | Remove symbol @var{symbolname} from the source file. This option may be | |
2834 | given more than once, and may be combined with strip options other than | |
c7c55b78 | 2835 | @option{-K}. |
252b5132 RH |
2836 | |
2837 | @item -o @var{file} | |
2838 | Put the stripped output in @var{file}, rather than replacing the | |
2839 | existing file. When this argument is used, only one @var{objfile} | |
2840 | argument may be specified. | |
2841 | ||
2842 | @item -p | |
2843 | @itemx --preserve-dates | |
2844 | Preserve the access and modification dates of the file. | |
2845 | ||
2e30cb57 CC |
2846 | @item -D |
2847 | @itemx --enable-deterministic-archives | |
955d0b3b RM |
2848 | @cindex deterministic archives |
2849 | @kindex --enable-deterministic-archives | |
2e30cb57 CC |
2850 | Operate in @emph{deterministic} mode. When copying archive members |
2851 | and writing the archive index, use zero for UIDs, GIDs, timestamps, | |
2852 | and use consistent file modes for all files. | |
2853 | ||
955d0b3b RM |
2854 | If @file{binutils} was configured with |
2855 | @option{--enable-deterministic-archives}, then this mode is on by default. | |
2856 | It can be disabled with the @samp{-U} option, below. | |
2857 | ||
2858 | @item -U | |
2859 | @itemx --disable-deterministic-archives | |
2860 | @cindex deterministic archives | |
2861 | @kindex --enable-deterministic-archives | |
2862 | Do @emph{not} operate in @emph{deterministic} mode. This is the | |
2863 | inverse of the @option{-D} option, above: when copying archive members | |
2864 | and writing the archive index, use their actual UID, GID, timestamp, | |
2865 | and file mode values. | |
2866 | ||
2867 | This is the default unless @file{binutils} was configured with | |
2868 | @option{--enable-deterministic-archives}. | |
2869 | ||
5fe11841 NC |
2870 | @item -w |
2871 | @itemx --wildcard | |
2872 | Permit regular expressions in @var{symbolname}s used in other command | |
2873 | line options. The question mark (?), asterisk (*), backslash (\) and | |
2874 | square brackets ([]) operators can be used anywhere in the symbol | |
2875 | name. If the first character of the symbol name is the exclamation | |
2876 | point (!) then the sense of the switch is reversed for that symbol. | |
2877 | For example: | |
2878 | ||
2879 | @smallexample | |
2880 | -w -K !foo -K fo* | |
2881 | @end smallexample | |
2882 | ||
2883 | would cause strip to only keep symbols that start with the letters | |
2884 | ``fo'', but to discard the symbol ``foo''. | |
2885 | ||
252b5132 RH |
2886 | @item -x |
2887 | @itemx --discard-all | |
2888 | Remove non-global symbols. | |
2889 | ||
2890 | @item -X | |
2891 | @itemx --discard-locals | |
2892 | Remove compiler-generated local symbols. | |
2893 | (These usually start with @samp{L} or @samp{.}.) | |
2894 | ||
1637cd90 JB |
2895 | @item --keep-file-symbols |
2896 | When stripping a file, perhaps with @option{--strip-debug} or | |
2897 | @option{--strip-unneeded}, retain any symbols specifying source file names, | |
2898 | which would otherwise get stripped. | |
2899 | ||
ed1653a7 | 2900 | @item --only-keep-debug |
c1c0eb9e RM |
2901 | Strip a file, removing contents of any sections that would not be |
2902 | stripped by @option{--strip-debug} and leaving the debugging sections | |
2903 | intact. In ELF files, this preserves all note sections in the output. | |
ed1653a7 NC |
2904 | |
2905 | The intention is that this option will be used in conjunction with | |
2906 | @option{--add-gnu-debuglink} to create a two part executable. One a | |
2907 | stripped binary which will occupy less space in RAM and in a | |
2908 | distribution and the second a debugging information file which is only | |
2909 | needed if debugging abilities are required. The suggested procedure | |
2910 | to create these files is as follows: | |
2911 | ||
2912 | @enumerate | |
2913 | @item Link the executable as normal. Assuming that is is called | |
2914 | @code{foo} then... | |
2915 | @item Run @code{objcopy --only-keep-debug foo foo.dbg} to | |
2916 | create a file containing the debugging info. | |
2917 | @item Run @code{objcopy --strip-debug foo} to create a | |
2918 | stripped executable. | |
2919 | @item Run @code{objcopy --add-gnu-debuglink=foo.dbg foo} | |
2920 | to add a link to the debugging info into the stripped executable. | |
2921 | @end enumerate | |
2922 | ||
928a4139 | 2923 | Note---the choice of @code{.dbg} as an extension for the debug info |
ed1653a7 NC |
2924 | file is arbitrary. Also the @code{--only-keep-debug} step is |
2925 | optional. You could instead do this: | |
2926 | ||
2927 | @enumerate | |
2928 | @item Link the executable as normal. | |
928a4139 | 2929 | @item Copy @code{foo} to @code{foo.full} |
ed1653a7 NC |
2930 | @item Run @code{strip --strip-debug foo} |
2931 | @item Run @code{objcopy --add-gnu-debuglink=foo.full foo} | |
2932 | @end enumerate | |
2933 | ||
928a4139 | 2934 | i.e., the file pointed to by the @option{--add-gnu-debuglink} can be the |
ed1653a7 NC |
2935 | full executable. It does not have to be a file created by the |
2936 | @option{--only-keep-debug} switch. | |
2937 | ||
928a4139 | 2938 | Note---this switch is only intended for use on fully linked files. It |
91bb255c NC |
2939 | does not make sense to use it on object files where the debugging |
2940 | information may be incomplete. Besides the gnu_debuglink feature | |
2941 | currently only supports the presence of one filename containing | |
2942 | debugging information, not multiple filenames on a one-per-object-file | |
2943 | basis. | |
2944 | ||
252b5132 RH |
2945 | @item -V |
2946 | @itemx --version | |
c7c55b78 | 2947 | Show the version number for @command{strip}. |
252b5132 RH |
2948 | |
2949 | @item -v | |
2950 | @itemx --verbose | |
2951 | Verbose output: list all object files modified. In the case of | |
2952 | archives, @samp{strip -v} lists all members of the archive. | |
2953 | @end table | |
2954 | ||
0285c67d NC |
2955 | @c man end |
2956 | ||
2957 | @ignore | |
2958 | @c man begin SEEALSO strip | |
2959 | the Info entries for @file{binutils}. | |
2960 | @c man end | |
2961 | @end ignore | |
2962 | ||
7ca01ed9 | 2963 | @node c++filt, addr2line, strip, Top |
252b5132 RH |
2964 | @chapter c++filt |
2965 | ||
2966 | @kindex c++filt | |
2967 | @cindex demangling C++ symbols | |
2968 | ||
0285c67d NC |
2969 | @c man title cxxfilt Demangle C++ and Java symbols. |
2970 | ||
252b5132 | 2971 | @smallexample |
0285c67d | 2972 | @c man begin SYNOPSIS cxxfilt |
ae9ab7c0 NC |
2973 | c++filt [@option{-_}|@option{--strip-underscore}] |
2974 | [@option{-n}|@option{--no-strip-underscore}] | |
4e48c9dd | 2975 | [@option{-p}|@option{--no-params}] |
ec948987 | 2976 | [@option{-t}|@option{--types}] |
cbf1f5df | 2977 | [@option{-i}|@option{--no-verbose}] |
c7c55b78 NC |
2978 | [@option{-s} @var{format}|@option{--format=}@var{format}] |
2979 | [@option{--help}] [@option{--version}] [@var{symbol}@dots{}] | |
0285c67d | 2980 | @c man end |
252b5132 RH |
2981 | @end smallexample |
2982 | ||
0285c67d NC |
2983 | @c man begin DESCRIPTION cxxfilt |
2984 | ||
9d51cc66 | 2985 | @kindex cxxfilt |
ec948987 NC |
2986 | The C++ and Java languages provide function overloading, which means |
2987 | that you can write many functions with the same name, providing that | |
2988 | each function takes parameters of different types. In order to be | |
2989 | able to distinguish these similarly named functions C++ and Java | |
2990 | encode them into a low-level assembler name which uniquely identifies | |
2991 | each different version. This process is known as @dfn{mangling}. The | |
2992 | @command{c++filt} | |
c1c0eb9e | 2993 | @footnote{MS-DOS does not allow @kbd{+} characters in file names, so on |
195a97ce | 2994 | MS-DOS this program is named @command{CXXFILT}.} |
9d51cc66 | 2995 | program does the inverse mapping: it decodes (@dfn{demangles}) low-level |
ec948987 | 2996 | names into user-level names so that they can be read. |
252b5132 RH |
2997 | |
2998 | Every alphanumeric word (consisting of letters, digits, underscores, | |
cbf1f5df NC |
2999 | dollars, or periods) seen in the input is a potential mangled name. |
3000 | If the name decodes into a C++ name, the C++ name replaces the | |
ec948987 NC |
3001 | low-level name in the output, otherwise the original word is output. |
3002 | In this way you can pass an entire assembler source file, containing | |
3003 | mangled names, through @command{c++filt} and see the same source file | |
3004 | containing demangled names. | |
252b5132 | 3005 | |
ec948987 NC |
3006 | You can also use @command{c++filt} to decipher individual symbols by |
3007 | passing them on the command line: | |
252b5132 RH |
3008 | |
3009 | @example | |
3010 | c++filt @var{symbol} | |
3011 | @end example | |
3012 | ||
c7c55b78 | 3013 | If no @var{symbol} arguments are given, @command{c++filt} reads symbol |
ec948987 NC |
3014 | names from the standard input instead. All the results are printed on |
3015 | the standard output. The difference between reading names from the | |
3016 | command line versus reading names from the standard input is that | |
3017 | command line arguments are expected to be just mangled names and no | |
b45619c0 | 3018 | checking is performed to separate them from surrounding text. Thus |
ec948987 NC |
3019 | for example: |
3020 | ||
3021 | @smallexample | |
3022 | c++filt -n _Z1fv | |
3023 | @end smallexample | |
3024 | ||
3025 | will work and demangle the name to ``f()'' whereas: | |
3026 | ||
3027 | @smallexample | |
3028 | c++filt -n _Z1fv, | |
3029 | @end smallexample | |
3030 | ||
3031 | will not work. (Note the extra comma at the end of the mangled | |
3032 | name which makes it invalid). This command however will work: | |
3033 | ||
3034 | @smallexample | |
3035 | echo _Z1fv, | c++filt -n | |
3036 | @end smallexample | |
3037 | ||
928a4139 | 3038 | and will display ``f(),'', i.e., the demangled name followed by a |
ec948987 NC |
3039 | trailing comma. This behaviour is because when the names are read |
3040 | from the standard input it is expected that they might be part of an | |
3041 | assembler source file where there might be extra, extraneous | |
928a4139 | 3042 | characters trailing after a mangled name. For example: |
ec948987 NC |
3043 | |
3044 | @smallexample | |
3045 | .type _Z1fv, @@function | |
3046 | @end smallexample | |
252b5132 | 3047 | |
0285c67d NC |
3048 | @c man end |
3049 | ||
3050 | @c man begin OPTIONS cxxfilt | |
3051 | ||
c7c55b78 | 3052 | @table @env |
252b5132 | 3053 | @item -_ |
ae9ab7c0 | 3054 | @itemx --strip-underscore |
252b5132 RH |
3055 | On some systems, both the C and C++ compilers put an underscore in front |
3056 | of every name. For example, the C name @code{foo} gets the low-level | |
3057 | name @code{_foo}. This option removes the initial underscore. Whether | |
c7c55b78 | 3058 | @command{c++filt} removes the underscore by default is target dependent. |
252b5132 | 3059 | |
252b5132 | 3060 | @item -n |
ae9ab7c0 | 3061 | @itemx --no-strip-underscore |
252b5132 RH |
3062 | Do not remove the initial underscore. |
3063 | ||
4e48c9dd ILT |
3064 | @item -p |
3065 | @itemx --no-params | |
3066 | When demangling the name of a function, do not display the types of | |
3067 | the function's parameters. | |
3068 | ||
cbf1f5df | 3069 | @item -t |
ec948987 NC |
3070 | @itemx --types |
3071 | Attempt to demangle types as well as function names. This is disabled | |
3072 | by default since mangled types are normally only used internally in | |
928a4139 | 3073 | the compiler, and they can be confused with non-mangled names. For example, |
ec948987 NC |
3074 | a function called ``a'' treated as a mangled type name would be |
3075 | demangled to ``signed char''. | |
cbf1f5df NC |
3076 | |
3077 | @item -i | |
3078 | @itemx --no-verbose | |
3079 | Do not include implementation details (if any) in the demangled | |
3080 | output. | |
3081 | ||
252b5132 RH |
3082 | @item -s @var{format} |
3083 | @itemx --format=@var{format} | |
947ed062 NC |
3084 | @command{c++filt} can decode various methods of mangling, used by |
3085 | different compilers. The argument to this option selects which | |
252b5132 RH |
3086 | method it uses: |
3087 | ||
3088 | @table @code | |
947ed062 NC |
3089 | @item auto |
3090 | Automatic selection based on executable (the default method) | |
252b5132 | 3091 | @item gnu |
947ed062 | 3092 | the one used by the @sc{gnu} C++ compiler (g++) |
252b5132 | 3093 | @item lucid |
947ed062 | 3094 | the one used by the Lucid compiler (lcc) |
252b5132 RH |
3095 | @item arm |
3096 | the one specified by the C++ Annotated Reference Manual | |
3097 | @item hp | |
947ed062 | 3098 | the one used by the HP compiler (aCC) |
252b5132 RH |
3099 | @item edg |
3100 | the one used by the EDG compiler | |
b5e2a4f3 | 3101 | @item gnu-v3 |
947ed062 NC |
3102 | the one used by the @sc{gnu} C++ compiler (g++) with the V3 ABI. |
3103 | @item java | |
3104 | the one used by the @sc{gnu} Java compiler (gcj) | |
3105 | @item gnat | |
3106 | the one used by the @sc{gnu} Ada compiler (GNAT). | |
252b5132 RH |
3107 | @end table |
3108 | ||
3109 | @item --help | |
c7c55b78 | 3110 | Print a summary of the options to @command{c++filt} and exit. |
252b5132 RH |
3111 | |
3112 | @item --version | |
c7c55b78 | 3113 | Print the version number of @command{c++filt} and exit. |
252b5132 RH |
3114 | @end table |
3115 | ||
0285c67d NC |
3116 | @c man end |
3117 | ||
3118 | @ignore | |
3119 | @c man begin SEEALSO cxxfilt | |
3120 | the Info entries for @file{binutils}. | |
3121 | @c man end | |
3122 | @end ignore | |
3123 | ||
252b5132 | 3124 | @quotation |
c7c55b78 | 3125 | @emph{Warning:} @command{c++filt} is a new utility, and the details of its |
252b5132 | 3126 | user interface are subject to change in future releases. In particular, |
b45619c0 | 3127 | a command-line option may be required in the future to decode a name |
c1c0eb9e | 3128 | passed as an argument on the command line; in other words, |
252b5132 RH |
3129 | |
3130 | @example | |
3131 | c++filt @var{symbol} | |
3132 | @end example | |
3133 | ||
3134 | @noindent | |
3135 | may in a future release become | |
3136 | ||
3137 | @example | |
3138 | c++filt @var{option} @var{symbol} | |
3139 | @end example | |
3140 | @end quotation | |
3141 | ||
3142 | @node addr2line | |
3143 | @chapter addr2line | |
3144 | ||
3145 | @kindex addr2line | |
3146 | @cindex address to file name and line number | |
3147 | ||
0285c67d NC |
3148 | @c man title addr2line convert addresses into file names and line numbers. |
3149 | ||
252b5132 | 3150 | @smallexample |
0285c67d | 3151 | @c man begin SYNOPSIS addr2line |
be6f6493 TG |
3152 | addr2line [@option{-a}|@option{--addresses}] |
3153 | [@option{-b} @var{bfdname}|@option{--target=}@var{bfdname}] | |
bf44dd74 | 3154 | [@option{-C}|@option{--demangle}[=@var{style}]] |
c7c55b78 NC |
3155 | [@option{-e} @var{filename}|@option{--exe=}@var{filename}] |
3156 | [@option{-f}|@option{--functions}] [@option{-s}|@option{--basename}] | |
0c552dc1 | 3157 | [@option{-i}|@option{--inlines}] |
68cdf72f | 3158 | [@option{-p}|@option{--pretty-print}] |
c5f8c388 | 3159 | [@option{-j}|@option{--section=}@var{name}] |
c7c55b78 NC |
3160 | [@option{-H}|@option{--help}] [@option{-V}|@option{--version}] |
3161 | [addr addr @dots{}] | |
0285c67d | 3162 | @c man end |
252b5132 RH |
3163 | @end smallexample |
3164 | ||
0285c67d NC |
3165 | @c man begin DESCRIPTION addr2line |
3166 | ||
c5f8c388 EB |
3167 | @command{addr2line} translates addresses into file names and line numbers. |
3168 | Given an address in an executable or an offset in a section of a relocatable | |
3169 | object, it uses the debugging information to figure out which file name and | |
3170 | line number are associated with it. | |
252b5132 | 3171 | |
c5f8c388 EB |
3172 | The executable or relocatable object to use is specified with the @option{-e} |
3173 | option. The default is the file @file{a.out}. The section in the relocatable | |
3174 | object to use is specified with the @option{-j} option. | |
252b5132 | 3175 | |
c7c55b78 | 3176 | @command{addr2line} has two modes of operation. |
252b5132 RH |
3177 | |
3178 | In the first, hexadecimal addresses are specified on the command line, | |
c7c55b78 | 3179 | and @command{addr2line} displays the file name and line number for each |
252b5132 RH |
3180 | address. |
3181 | ||
c7c55b78 | 3182 | In the second, @command{addr2line} reads hexadecimal addresses from |
252b5132 | 3183 | standard input, and prints the file name and line number for each |
c7c55b78 | 3184 | address on standard output. In this mode, @command{addr2line} may be used |
252b5132 RH |
3185 | in a pipe to convert dynamically chosen addresses. |
3186 | ||
3187 | The format of the output is @samp{FILENAME:LINENO}. The file name and | |
9cf03b7e NC |
3188 | line number for each input address is printed on separate lines. |
3189 | ||
3190 | If the @option{-f} option is used, then each @samp{FILENAME:LINENO} | |
3191 | line is preceded by @samp{FUNCTIONNAME} which is the name of the | |
3192 | function containing the address. | |
3193 | ||
3194 | If the @option{-i} option is used and the code at the given address is | |
3195 | present there because of inlining by the compiler then the | |
3196 | @samp{@{FUNCTIONNAME@} FILENAME:LINENO} information for the inlining | |
3197 | function will be displayed afterwards. This continues recursively | |
3198 | until there is no more inlining to report. | |
3199 | ||
3200 | If the @option{-a} option is used then the output is prefixed by the | |
3201 | input address. | |
3202 | ||
3203 | If the @option{-p} option is used then the output for each input | |
3204 | address is displayed on one, possibly quite long, line. If | |
3205 | @option{-p} is not used then the output is broken up into multiple | |
3206 | lines, based on the paragraphs above. | |
252b5132 RH |
3207 | |
3208 | If the file name or function name can not be determined, | |
c7c55b78 NC |
3209 | @command{addr2line} will print two question marks in their place. If the |
3210 | line number can not be determined, @command{addr2line} will print 0. | |
252b5132 | 3211 | |
0285c67d NC |
3212 | @c man end |
3213 | ||
3214 | @c man begin OPTIONS addr2line | |
3215 | ||
252b5132 RH |
3216 | The long and short forms of options, shown here as alternatives, are |
3217 | equivalent. | |
3218 | ||
c7c55b78 | 3219 | @table @env |
be6f6493 TG |
3220 | @item -a |
3221 | @itemx --addresses | |
9cf03b7e | 3222 | Display the address before the function name, file and line number |
be6f6493 TG |
3223 | information. The address is printed with a @samp{0x} prefix to easily |
3224 | identify it. | |
3225 | ||
252b5132 RH |
3226 | @item -b @var{bfdname} |
3227 | @itemx --target=@var{bfdname} | |
3228 | @cindex object code format | |
3229 | Specify that the object-code format for the object files is | |
3230 | @var{bfdname}. | |
3231 | ||
3232 | @item -C | |
28c309a2 | 3233 | @itemx --demangle[=@var{style}] |
252b5132 RH |
3234 | @cindex demangling in objdump |
3235 | Decode (@dfn{demangle}) low-level symbol names into user-level names. | |
3236 | Besides removing any initial underscore prepended by the system, this | |
28c309a2 | 3237 | makes C++ function names readable. Different compilers have different |
c1c0eb9e RM |
3238 | mangling styles. The optional demangling style argument can be used to |
3239 | choose an appropriate demangling style for your compiler. @xref{c++filt}, | |
28c309a2 | 3240 | for more information on demangling. |
252b5132 RH |
3241 | |
3242 | @item -e @var{filename} | |
3243 | @itemx --exe=@var{filename} | |
3244 | Specify the name of the executable for which addresses should be | |
3245 | translated. The default file is @file{a.out}. | |
3246 | ||
3247 | @item -f | |
3248 | @itemx --functions | |
3249 | Display function names as well as file and line number information. | |
3250 | ||
3251 | @item -s | |
3252 | @itemx --basenames | |
3253 | Display only the base of each file name. | |
0c552dc1 FF |
3254 | |
3255 | @item -i | |
3256 | @itemx --inlines | |
3257 | If the address belongs to a function that was inlined, the source | |
3258 | information for all enclosing scopes back to the first non-inlined | |
3259 | function will also be printed. For example, if @code{main} inlines | |
3260 | @code{callee1} which inlines @code{callee2}, and address is from | |
3261 | @code{callee2}, the source information for @code{callee1} and @code{main} | |
3262 | will also be printed. | |
c5f8c388 EB |
3263 | |
3264 | @item -j | |
3265 | @itemx --section | |
3266 | Read offsets relative to the specified section instead of absolute addresses. | |
68cdf72f TG |
3267 | |
3268 | @item -p | |
3269 | @itemx --pretty-print | |
3270 | Make the output more human friendly: each location are printed on one line. | |
3271 | If option @option{-i} is specified, lines for all enclosing scopes are | |
3272 | prefixed with @samp{(inlined by)}. | |
e107c42f | 3273 | @end table |
252b5132 | 3274 | |
0285c67d NC |
3275 | @c man end |
3276 | ||
3277 | @ignore | |
3278 | @c man begin SEEALSO addr2line | |
3279 | Info entries for @file{binutils}. | |
3280 | @c man end | |
3281 | @end ignore | |
3282 | ||
252b5132 RH |
3283 | @node nlmconv |
3284 | @chapter nlmconv | |
3285 | ||
c7c55b78 | 3286 | @command{nlmconv} converts a relocatable object file into a NetWare |
252b5132 RH |
3287 | Loadable Module. |
3288 | ||
3289 | @ignore | |
c7c55b78 | 3290 | @command{nlmconv} currently works with @samp{i386} object |
252b5132 RH |
3291 | files in @code{coff}, @sc{elf}, or @code{a.out} format, and @sc{SPARC} |
3292 | object files in @sc{elf}, or @code{a.out} format@footnote{ | |
c7c55b78 | 3293 | @command{nlmconv} should work with any @samp{i386} or @sc{sparc} object |
252b5132 RH |
3294 | format in the Binary File Descriptor library. It has only been tested |
3295 | with the above formats.}. | |
3296 | @end ignore | |
3297 | ||
3298 | @quotation | |
c7c55b78 | 3299 | @emph{Warning:} @command{nlmconv} is not always built as part of the binary |
252b5132 RH |
3300 | utilities, since it is only useful for NLM targets. |
3301 | @end quotation | |
3302 | ||
0285c67d NC |
3303 | @c man title nlmconv converts object code into an NLM. |
3304 | ||
252b5132 | 3305 | @smallexample |
0285c67d | 3306 | @c man begin SYNOPSIS nlmconv |
c7c55b78 NC |
3307 | nlmconv [@option{-I} @var{bfdname}|@option{--input-target=}@var{bfdname}] |
3308 | [@option{-O} @var{bfdname}|@option{--output-target=}@var{bfdname}] | |
3309 | [@option{-T} @var{headerfile}|@option{--header-file=}@var{headerfile}] | |
3310 | [@option{-d}|@option{--debug}] [@option{-l} @var{linker}|@option{--linker=}@var{linker}] | |
3311 | [@option{-h}|@option{--help}] [@option{-V}|@option{--version}] | |
252b5132 | 3312 | @var{infile} @var{outfile} |
0285c67d | 3313 | @c man end |
252b5132 RH |
3314 | @end smallexample |
3315 | ||
0285c67d NC |
3316 | @c man begin DESCRIPTION nlmconv |
3317 | ||
c7c55b78 | 3318 | @command{nlmconv} converts the relocatable @samp{i386} object file |
252b5132 RH |
3319 | @var{infile} into the NetWare Loadable Module @var{outfile}, optionally |
3320 | reading @var{headerfile} for NLM header information. For instructions | |
3321 | on writing the NLM command file language used in header files, see the | |
3322 | @samp{linkers} section, @samp{NLMLINK} in particular, of the @cite{NLM | |
3323 | Development and Tools Overview}, which is part of the NLM Software | |
3324 | Developer's Kit (``NLM SDK''), available from Novell, Inc. | |
c7c55b78 | 3325 | @command{nlmconv} uses the @sc{gnu} Binary File Descriptor library to read |
0285c67d NC |
3326 | @var{infile}; |
3327 | @ifclear man | |
3328 | see @ref{BFD,,BFD,ld.info,Using LD}, for more information. | |
3329 | @end ifclear | |
252b5132 | 3330 | |
c7c55b78 | 3331 | @command{nlmconv} can perform a link step. In other words, you can list |
252b5132 RH |
3332 | more than one object file for input if you list them in the definitions |
3333 | file (rather than simply specifying one input file on the command line). | |
c7c55b78 | 3334 | In this case, @command{nlmconv} calls the linker for you. |
252b5132 | 3335 | |
0285c67d NC |
3336 | @c man end |
3337 | ||
3338 | @c man begin OPTIONS nlmconv | |
3339 | ||
c7c55b78 | 3340 | @table @env |
252b5132 RH |
3341 | @item -I @var{bfdname} |
3342 | @itemx --input-target=@var{bfdname} | |
c7c55b78 | 3343 | Object format of the input file. @command{nlmconv} can usually determine |
252b5132 RH |
3344 | the format of a given file (so no default is necessary). |
3345 | @xref{Target Selection}, for more information. | |
3346 | ||
3347 | @item -O @var{bfdname} | |
3348 | @itemx --output-target=@var{bfdname} | |
c7c55b78 | 3349 | Object format of the output file. @command{nlmconv} infers the output |
252b5132 RH |
3350 | format based on the input format, e.g. for a @samp{i386} input file the |
3351 | output format is @samp{nlm32-i386}. | |
3352 | @xref{Target Selection}, for more information. | |
3353 | ||
3354 | @item -T @var{headerfile} | |
3355 | @itemx --header-file=@var{headerfile} | |
3356 | Reads @var{headerfile} for NLM header information. For instructions on | |
3357 | writing the NLM command file language used in header files, see@ see the | |
3358 | @samp{linkers} section, of the @cite{NLM Development and Tools | |
3359 | Overview}, which is part of the NLM Software Developer's Kit, available | |
3360 | from Novell, Inc. | |
3361 | ||
3362 | @item -d | |
3363 | @itemx --debug | |
c7c55b78 | 3364 | Displays (on standard error) the linker command line used by @command{nlmconv}. |
252b5132 RH |
3365 | |
3366 | @item -l @var{linker} | |
3367 | @itemx --linker=@var{linker} | |
3368 | Use @var{linker} for any linking. @var{linker} can be an absolute or a | |
3369 | relative pathname. | |
3370 | ||
3371 | @item -h | |
3372 | @itemx --help | |
3373 | Prints a usage summary. | |
3374 | ||
3375 | @item -V | |
3376 | @itemx --version | |
c7c55b78 | 3377 | Prints the version number for @command{nlmconv}. |
252b5132 RH |
3378 | @end table |
3379 | ||
0285c67d NC |
3380 | @c man end |
3381 | ||
3382 | @ignore | |
3383 | @c man begin SEEALSO nlmconv | |
3384 | the Info entries for @file{binutils}. | |
692ed3e7 NC |
3385 | @c man end |
3386 | @end ignore | |
3387 | ||
3388 | @node windmc | |
3389 | @chapter windmc | |
3390 | ||
3391 | @command{windmc} may be used to generator Windows message resources. | |
3392 | ||
3393 | @quotation | |
3394 | @emph{Warning:} @command{windmc} is not always built as part of the binary | |
3395 | utilities, since it is only useful for Windows targets. | |
3396 | @end quotation | |
3397 | ||
3398 | @c man title windmc generates Windows message resources. | |
3399 | ||
3400 | @smallexample | |
826fec2f | 3401 | @c man begin SYNOPSIS windmc |
692ed3e7 NC |
3402 | windmc [options] input-file |
3403 | @c man end | |
3404 | @end smallexample | |
3405 | ||
3406 | @c man begin DESCRIPTION windmc | |
3407 | ||
3408 | @command{windmc} reads message definitions from an input file (.mc) and | |
3409 | translate them into a set of output files. The output files may be of | |
3410 | four kinds: | |
3411 | ||
3412 | @table @code | |
3413 | @item h | |
3414 | A C header file containing the message definitions. | |
3415 | ||
3416 | @item rc | |
3417 | A resource file compilable by the @command{windres} tool. | |
3418 | ||
3419 | @item bin | |
3420 | One or more binary files containing the resource data for a specific | |
3421 | message language. | |
3422 | ||
3423 | @item dbg | |
3424 | A C include file that maps message id's to their symbolic name. | |
3425 | @end table | |
3426 | ||
3427 | The exact description of these different formats is available in | |
3428 | documentation from Microsoft. | |
3429 | ||
3430 | When @command{windmc} converts from the @code{mc} format to the @code{bin} | |
3431 | format, @code{rc}, @code{h}, and optional @code{dbg} it is acting like the | |
3432 | Windows Message Compiler. | |
3433 | ||
3434 | @c man end | |
3435 | ||
3436 | @c man begin OPTIONS windmc | |
3437 | ||
3438 | @table @env | |
3439 | @item -a | |
3440 | @itemx --ascii_in | |
826fec2f | 3441 | Specifies that the input file specified is ASCII. This is the default |
692ed3e7 NC |
3442 | behaviour. |
3443 | ||
3444 | @item -A | |
3445 | @itemx --ascii_out | |
826fec2f | 3446 | Specifies that messages in the output @code{bin} files should be in ASCII |
692ed3e7 NC |
3447 | format. |
3448 | ||
3449 | @item -b | |
3450 | @itemx --binprefix | |
3451 | Specifies that @code{bin} filenames should have to be prefixed by the | |
3452 | basename of the source file. | |
3453 | ||
3454 | @item -c | |
3455 | @itemx --customflag | |
3456 | Sets the customer bit in all message id's. | |
3457 | ||
3458 | @item -C @var{codepage} | |
3459 | @itemx --codepage_in @var{codepage} | |
3460 | Sets the default codepage to be used to convert input file to UTF16. The | |
3461 | default is ocdepage 1252. | |
3462 | ||
3463 | @item -d | |
3464 | @itemx --decimal_values | |
3465 | Outputs the constants in the header file in decimal. Default is using | |
3466 | hexadecimal output. | |
3467 | ||
3468 | @item -e @var{ext} | |
3469 | @itemx --extension @var{ext} | |
3470 | The extension for the header file. The default is .h extension. | |
3471 | ||
3472 | @item -F @var{target} | |
3473 | @itemx --target @var{target} | |
3474 | Specify the BFD format to use for a bin file as output. This | |
3475 | is a BFD target name; you can use the @option{--help} option to see a list | |
3476 | of supported targets. Normally @command{windmc} will use the default | |
3477 | format, which is the first one listed by the @option{--help} option. | |
3478 | @ifclear man | |
3479 | @ref{Target Selection}. | |
3480 | @end ifclear | |
3481 | ||
3482 | @item -h @var{path} | |
3483 | @itemx --headerdir @var{path} | |
3484 | The target directory of the generated header file. The default is the | |
3485 | current directory. | |
3486 | ||
3487 | @item -H | |
3488 | @itemx --help | |
3489 | Displays a list of command line options and then exits. | |
3490 | ||
3491 | @item -m @var{characters} | |
3492 | @itemx --maxlength @var{characters} | |
3493 | Instructs @command{windmc} to generate a warning if the length | |
3494 | of any message exceeds the number specified. | |
3495 | ||
3496 | @item -n | |
3497 | @itemx --nullterminate | |
3498 | Terminate message text in @code{bin} files by zero. By default they are | |
3499 | terminated by CR/LF. | |
3500 | ||
3501 | @item -o | |
3502 | @itemx --hresult_use | |
3503 | Not yet implemented. Instructs @code{windmc} to generate an OLE2 header | |
3504 | file, using HRESULT definitions. Status codes are used if the flag is not | |
3505 | specified. | |
3506 | ||
3507 | @item -O @var{codepage} | |
3508 | @itemx --codepage_out @var{codepage} | |
3509 | Sets the default codepage to be used to output text files. The default | |
3510 | is ocdepage 1252. | |
3511 | ||
3512 | @item -r @var{path} | |
3513 | @itemx --rcdir @var{path} | |
3514 | The target directory for the generated @code{rc} script and the generated | |
3515 | @code{bin} files that the resource compiler script includes. The default | |
3516 | is the current directory. | |
3517 | ||
3518 | @item -u | |
3519 | @itemx --unicode_in | |
3520 | Specifies that the input file is UTF16. | |
3521 | ||
3522 | @item -U | |
3523 | @itemx --unicode_out | |
3524 | Specifies that messages in the output @code{bin} file should be in UTF16 | |
3525 | format. This is the default behaviour. | |
3526 | ||
3527 | @item -v | |
3528 | @item --verbose | |
bd37ed49 | 3529 | Enable verbose mode. |
692ed3e7 NC |
3530 | |
3531 | @item -V | |
3532 | @item --version | |
bd37ed49 | 3533 | Prints the version number for @command{windmc}. |
692ed3e7 NC |
3534 | |
3535 | @item -x @var{path} | |
3536 | @itemx --xdgb @var{path} | |
3537 | The path of the @code{dbg} C include file that maps message id's to the | |
3538 | symbolic name. No such file is generated without specifying the switch. | |
3539 | @end table | |
3540 | ||
3541 | @c man end | |
3542 | ||
3543 | @ignore | |
3544 | @c man begin SEEALSO windmc | |
3545 | the Info entries for @file{binutils}. | |
0285c67d NC |
3546 | @c man end |
3547 | @end ignore | |
3548 | ||
252b5132 RH |
3549 | @node windres |
3550 | @chapter windres | |
3551 | ||
c7c55b78 | 3552 | @command{windres} may be used to manipulate Windows resources. |
252b5132 RH |
3553 | |
3554 | @quotation | |
c7c55b78 | 3555 | @emph{Warning:} @command{windres} is not always built as part of the binary |
252b5132 RH |
3556 | utilities, since it is only useful for Windows targets. |
3557 | @end quotation | |
3558 | ||
0285c67d NC |
3559 | @c man title windres manipulate Windows resources. |
3560 | ||
252b5132 | 3561 | @smallexample |
0285c67d | 3562 | @c man begin SYNOPSIS windres |
252b5132 | 3563 | windres [options] [input-file] [output-file] |
0285c67d | 3564 | @c man end |
252b5132 RH |
3565 | @end smallexample |
3566 | ||
0285c67d NC |
3567 | @c man begin DESCRIPTION windres |
3568 | ||
c7c55b78 | 3569 | @command{windres} reads resources from an input file and copies them into |
252b5132 RH |
3570 | an output file. Either file may be in one of three formats: |
3571 | ||
3572 | @table @code | |
3573 | @item rc | |
3574 | A text format read by the Resource Compiler. | |
3575 | ||
3576 | @item res | |
3577 | A binary format generated by the Resource Compiler. | |
3578 | ||
3579 | @item coff | |
3580 | A COFF object or executable. | |
3581 | @end table | |
3582 | ||
3583 | The exact description of these different formats is available in | |
3584 | documentation from Microsoft. | |
3585 | ||
c7c55b78 | 3586 | When @command{windres} converts from the @code{rc} format to the @code{res} |
252b5132 | 3587 | format, it is acting like the Windows Resource Compiler. When |
c7c55b78 | 3588 | @command{windres} converts from the @code{res} format to the @code{coff} |
252b5132 RH |
3589 | format, it is acting like the Windows @code{CVTRES} program. |
3590 | ||
c7c55b78 | 3591 | When @command{windres} generates an @code{rc} file, the output is similar |
252b5132 RH |
3592 | but not identical to the format expected for the input. When an input |
3593 | @code{rc} file refers to an external filename, an output @code{rc} file | |
3594 | will instead include the file contents. | |
3595 | ||
c7c55b78 | 3596 | If the input or output format is not specified, @command{windres} will |
252b5132 RH |
3597 | guess based on the file name, or, for the input file, the file contents. |
3598 | A file with an extension of @file{.rc} will be treated as an @code{rc} | |
3599 | file, a file with an extension of @file{.res} will be treated as a | |
3600 | @code{res} file, and a file with an extension of @file{.o} or | |
3601 | @file{.exe} will be treated as a @code{coff} file. | |
3602 | ||
c7c55b78 | 3603 | If no output file is specified, @command{windres} will print the resources |
252b5132 RH |
3604 | in @code{rc} format to standard output. |
3605 | ||
c7c55b78 | 3606 | The normal use is for you to write an @code{rc} file, use @command{windres} |
252b5132 RH |
3607 | to convert it to a COFF object file, and then link the COFF file into |
3608 | your application. This will make the resources described in the | |
3609 | @code{rc} file available to Windows. | |
3610 | ||
0285c67d NC |
3611 | @c man end |
3612 | ||
3613 | @c man begin OPTIONS windres | |
3614 | ||
c7c55b78 | 3615 | @table @env |
252b5132 RH |
3616 | @item -i @var{filename} |
3617 | @itemx --input @var{filename} | |
3618 | The name of the input file. If this option is not used, then | |
c7c55b78 NC |
3619 | @command{windres} will use the first non-option argument as the input file |
3620 | name. If there are no non-option arguments, then @command{windres} will | |
3621 | read from standard input. @command{windres} can not read a COFF file from | |
edbedb71 | 3622 | standard input. |
252b5132 RH |
3623 | |
3624 | @item -o @var{filename} | |
3625 | @itemx --output @var{filename} | |
3626 | The name of the output file. If this option is not used, then | |
c7c55b78 | 3627 | @command{windres} will use the first non-option argument, after any used |
252b5132 | 3628 | for the input file name, as the output file name. If there is no |
c7c55b78 | 3629 | non-option argument, then @command{windres} will write to standard output. |
edbedb71 | 3630 | @command{windres} can not write a COFF file to standard output. Note, |
b45619c0 | 3631 | for compatibility with @command{rc} the option @option{-fo} is also |
edbedb71 | 3632 | accepted, but its use is not recommended. |
252b5132 | 3633 | |
85eb5110 | 3634 | @item -J @var{format} |
252b5132 RH |
3635 | @itemx --input-format @var{format} |
3636 | The input format to read. @var{format} may be @samp{res}, @samp{rc}, or | |
c7c55b78 | 3637 | @samp{coff}. If no input format is specified, @command{windres} will |
252b5132 RH |
3638 | guess, as described above. |
3639 | ||
3640 | @item -O @var{format} | |
3641 | @itemx --output-format @var{format} | |
3642 | The output format to generate. @var{format} may be @samp{res}, | |
3643 | @samp{rc}, or @samp{coff}. If no output format is specified, | |
c7c55b78 | 3644 | @command{windres} will guess, as described above. |
252b5132 RH |
3645 | |
3646 | @item -F @var{target} | |
3647 | @itemx --target @var{target} | |
3648 | Specify the BFD format to use for a COFF file as input or output. This | |
c7c55b78 NC |
3649 | is a BFD target name; you can use the @option{--help} option to see a list |
3650 | of supported targets. Normally @command{windres} will use the default | |
3651 | format, which is the first one listed by the @option{--help} option. | |
3652 | @ifclear man | |
252b5132 | 3653 | @ref{Target Selection}. |
c7c55b78 | 3654 | @end ifclear |
252b5132 RH |
3655 | |
3656 | @item --preprocessor @var{program} | |
c7c55b78 | 3657 | When @command{windres} reads an @code{rc} file, it runs it through the C |
252b5132 RH |
3658 | preprocessor first. This option may be used to specify the preprocessor |
3659 | to use, including any leading arguments. The default preprocessor | |
3660 | argument is @code{gcc -E -xc-header -DRC_INVOKED}. | |
3661 | ||
ec25acb3 NC |
3662 | @item --preprocessor-arg @var{option} |
3663 | When @command{windres} reads an @code{rc} file, it runs it through | |
3664 | the C preprocessor first. This option may be used to specify additional | |
3665 | text to be passed to preprocessor on its command line. | |
3666 | This option can be used multiple times to add multiple options to the | |
3667 | preprocessor command line. | |
3668 | ||
85eb5110 NC |
3669 | @item -I @var{directory} |
3670 | @itemx --include-dir @var{directory} | |
252b5132 | 3671 | Specify an include directory to use when reading an @code{rc} file. |
c7c55b78 NC |
3672 | @command{windres} will pass this to the preprocessor as an @option{-I} |
3673 | option. @command{windres} will also search this directory when looking for | |
85eb5110 | 3674 | files named in the @code{rc} file. If the argument passed to this command |
c1c0eb9e | 3675 | matches any of the supported @var{formats} (as described in the @option{-J} |
85eb5110 NC |
3676 | option), it will issue a deprecation warning, and behave just like the |
3677 | @option{-J} option. New programs should not use this behaviour. If a | |
3678 | directory happens to match a @var{format}, simple prefix it with @samp{./} | |
3679 | to disable the backward compatibility. | |
252b5132 | 3680 | |
751d21b5 | 3681 | @item -D @var{target} |
ad0481cd | 3682 | @itemx --define @var{sym}[=@var{val}] |
c7c55b78 | 3683 | Specify a @option{-D} option to pass to the preprocessor when reading an |
252b5132 RH |
3684 | @code{rc} file. |
3685 | ||
29b058f1 NC |
3686 | @item -U @var{target} |
3687 | @itemx --undefine @var{sym} | |
3688 | Specify a @option{-U} option to pass to the preprocessor when reading an | |
3689 | @code{rc} file. | |
3690 | ||
3126d709 CF |
3691 | @item -r |
3692 | Ignored for compatibility with rc. | |
3693 | ||
751d21b5 DD |
3694 | @item -v |
3695 | Enable verbose mode. This tells you what the preprocessor is if you | |
3696 | didn't specify one. | |
3697 | ||
30ff741f NC |
3698 | @item -c @var{val} |
3699 | @item --codepage @var{val} | |
3700 | Specify the default codepage to use when reading an @code{rc} file. | |
3701 | @var{val} should be a hexadecimal prefixed by @samp{0x} or decimal | |
3702 | codepage code. The valid range is from zero up to 0xffff, but the | |
3703 | validity of the codepage is host and configuration dependent. | |
3704 | ||
3077f5d8 | 3705 | @item -l @var{val} |
252b5132 RH |
3706 | @item --language @var{val} |
3707 | Specify the default language to use when reading an @code{rc} file. | |
3708 | @var{val} should be a hexadecimal language code. The low eight bits are | |
3709 | the language, and the high eight bits are the sublanguage. | |
3710 | ||
5a298d2d NC |
3711 | @item --use-temp-file |
3712 | Use a temporary file to instead of using popen to read the output of | |
c1c0eb9e RM |
3713 | the preprocessor. Use this option if the popen implementation is buggy |
3714 | on the host (eg., certain non-English language versions of Windows 95 and | |
5a298d2d NC |
3715 | Windows 98 are known to have buggy popen where the output will instead |
3716 | go the console). | |
3717 | ||
3718 | @item --no-use-temp-file | |
3719 | Use popen, not a temporary file, to read the output of the preprocessor. | |
3720 | This is the default behaviour. | |
3721 | ||
3077f5d8 | 3722 | @item -h |
252b5132 RH |
3723 | @item --help |
3724 | Prints a usage summary. | |
3725 | ||
3077f5d8 | 3726 | @item -V |
252b5132 | 3727 | @item --version |
c7c55b78 | 3728 | Prints the version number for @command{windres}. |
252b5132 RH |
3729 | |
3730 | @item --yydebug | |
c7c55b78 | 3731 | If @command{windres} is compiled with @code{YYDEBUG} defined as @code{1}, |
252b5132 RH |
3732 | this will turn on parser debugging. |
3733 | @end table | |
3734 | ||
0285c67d NC |
3735 | @c man end |
3736 | ||
3737 | @ignore | |
3738 | @c man begin SEEALSO windres | |
3739 | the Info entries for @file{binutils}. | |
3740 | @c man end | |
3741 | @end ignore | |
252b5132 RH |
3742 | |
3743 | @node dlltool | |
2aa9814e | 3744 | @chapter dlltool |
252b5132 RH |
3745 | @cindex DLL |
3746 | @kindex dlltool | |
3747 | ||
2aa9814e BE |
3748 | @command{dlltool} is used to create the files needed to create dynamic |
3749 | link libraries (DLLs) on systems which understand PE format image | |
3750 | files such as Windows. A DLL contains an export table which contains | |
3751 | information that the runtime loader needs to resolve references from a | |
3752 | referencing program. | |
3753 | ||
3754 | The export table is generated by this program by reading in a | |
3755 | @file{.def} file or scanning the @file{.a} and @file{.o} files which | |
3756 | will be in the DLL. A @file{.o} file can contain information in | |
3757 | special @samp{.drectve} sections with export information. | |
252b5132 RH |
3758 | |
3759 | @quotation | |
2aa9814e BE |
3760 | @emph{Note:} @command{dlltool} is not always built as part of the |
3761 | binary utilities, since it is only useful for those targets which | |
3762 | support DLLs. | |
252b5132 RH |
3763 | @end quotation |
3764 | ||
0285c67d NC |
3765 | @c man title dlltool Create files needed to build and use DLLs. |
3766 | ||
252b5132 | 3767 | @smallexample |
0285c67d | 3768 | @c man begin SYNOPSIS dlltool |
c7c55b78 NC |
3769 | dlltool [@option{-d}|@option{--input-def} @var{def-file-name}] |
3770 | [@option{-b}|@option{--base-file} @var{base-file-name}] | |
3771 | [@option{-e}|@option{--output-exp} @var{exports-file-name}] | |
3772 | [@option{-z}|@option{--output-def} @var{def-file-name}] | |
c1c0eb9e | 3773 | [@option{-l}|@option{--output-lib} @var{library-file-name}] |
10e636d2 | 3774 | [@option{-y}|@option{--output-delaylib} @var{library-file-name}] |
c7c55b78 NC |
3775 | [@option{--export-all-symbols}] [@option{--no-export-all-symbols}] |
3776 | [@option{--exclude-symbols} @var{list}] | |
3777 | [@option{--no-default-excludes}] | |
3778 | [@option{-S}|@option{--as} @var{path-to-assembler}] [@option{-f}|@option{--as-flags} @var{options}] | |
3779 | [@option{-D}|@option{--dllname} @var{name}] [@option{-m}|@option{--machine} @var{machine}] | |
14288fdc DS |
3780 | [@option{-a}|@option{--add-indirect}] |
3781 | [@option{-U}|@option{--add-underscore}] [@option{--add-stdcall-underscore}] | |
3782 | [@option{-k}|@option{--kill-at}] [@option{-A}|@option{--add-stdcall-alias}] | |
607dea97 | 3783 | [@option{-p}|@option{--ext-prefix-alias} @var{prefix}] |
d4732f7c | 3784 | [@option{-x}|@option{--no-idata4}] [@option{-c}|@option{--no-idata5}] |
e77b97d4 | 3785 | [@option{--use-nul-prefixed-import-tables}] |
71c57c16 NC |
3786 | [@option{-I}|@option{--identify} @var{library-file-name}] [@option{--identify-strict}] |
3787 | [@option{-i}|@option{--interwork}] | |
f9346411 | 3788 | [@option{-n}|@option{--nodelete}] [@option{-t}|@option{--temp-prefix} @var{prefix}] |
c1c0eb9e | 3789 | [@option{-v}|@option{--verbose}] |
c7c55b78 | 3790 | [@option{-h}|@option{--help}] [@option{-V}|@option{--version}] |
36d21de5 | 3791 | [@option{--no-leading-underscore}] [@option{--leading-underscore}] |
252b5132 | 3792 | [object-file @dots{}] |
0285c67d | 3793 | @c man end |
252b5132 RH |
3794 | @end smallexample |
3795 | ||
0285c67d NC |
3796 | @c man begin DESCRIPTION dlltool |
3797 | ||
c7c55b78 NC |
3798 | @command{dlltool} reads its inputs, which can come from the @option{-d} and |
3799 | @option{-b} options as well as object files specified on the command | |
3800 | line. It then processes these inputs and if the @option{-e} option has | |
3801 | been specified it creates a exports file. If the @option{-l} option | |
3802 | has been specified it creates a library file and if the @option{-z} option | |
c1c0eb9e RM |
3803 | has been specified it creates a def file. Any or all of the @option{-e}, |
3804 | @option{-l} and @option{-z} options can be present in one invocation of | |
c7c55b78 | 3805 | dlltool. |
252b5132 RH |
3806 | |
3807 | When creating a DLL, along with the source for the DLL, it is necessary | |
c7c55b78 | 3808 | to have three other files. @command{dlltool} can help with the creation of |
252b5132 RH |
3809 | these files. |
3810 | ||
2aa9814e | 3811 | The first file is a @file{.def} file which specifies which functions are |
252b5132 | 3812 | exported from the DLL, which functions the DLL imports, and so on. This |
c7c55b78 NC |
3813 | is a text file and can be created by hand, or @command{dlltool} can be used |
3814 | to create it using the @option{-z} option. In this case @command{dlltool} | |
252b5132 RH |
3815 | will scan the object files specified on its command line looking for |
3816 | those functions which have been specially marked as being exported and | |
2aa9814e | 3817 | put entries for them in the @file{.def} file it creates. |
252b5132 RH |
3818 | |
3819 | In order to mark a function as being exported from a DLL, it needs to | |
c7c55b78 | 3820 | have an @option{-export:<name_of_function>} entry in the @samp{.drectve} |
252b5132 RH |
3821 | section of the object file. This can be done in C by using the |
3822 | asm() operator: | |
3823 | ||
3824 | @smallexample | |
c1c0eb9e | 3825 | asm (".section .drectve"); |
252b5132 RH |
3826 | asm (".ascii \"-export:my_func\""); |
3827 | ||
3828 | int my_func (void) @{ @dots{} @} | |
3829 | @end smallexample | |
3830 | ||
3831 | The second file needed for DLL creation is an exports file. This file | |
3832 | is linked with the object files that make up the body of the DLL and it | |
3833 | handles the interface between the DLL and the outside world. This is a | |
c7c55b78 | 3834 | binary file and it can be created by giving the @option{-e} option to |
c1c0eb9e | 3835 | @command{dlltool} when it is creating or reading in a @file{.def} file. |
252b5132 RH |
3836 | |
3837 | The third file needed for DLL creation is the library file that programs | |
d4732f7c CW |
3838 | will link with in order to access the functions in the DLL (an `import |
3839 | library'). This file can be created by giving the @option{-l} option to | |
3840 | dlltool when it is creating or reading in a @file{.def} file. | |
252b5132 | 3841 | |
10e636d2 DK |
3842 | If the @option{-y} option is specified, dlltool generates a delay-import |
3843 | library that can be used instead of the normal import library to allow | |
3844 | a program to link to the dll only as soon as an imported function is | |
3845 | called for the first time. The resulting executable will need to be | |
3846 | linked to the static delayimp library containing __delayLoadHelper2(), | |
3847 | which in turn will import LoadLibraryA and GetProcAddress from kernel32. | |
3848 | ||
c7c55b78 | 3849 | @command{dlltool} builds the library file by hand, but it builds the |
252b5132 | 3850 | exports file by creating temporary files containing assembler statements |
c7c55b78 | 3851 | and then assembling these. The @option{-S} command line option can be |
252b5132 | 3852 | used to specify the path to the assembler that dlltool will use, |
c7c55b78 NC |
3853 | and the @option{-f} option can be used to pass specific flags to that |
3854 | assembler. The @option{-n} can be used to prevent dlltool from deleting | |
3855 | these temporary assembler files when it is done, and if @option{-n} is | |
252b5132 RH |
3856 | specified twice then this will prevent dlltool from deleting the |
3857 | temporary object files it used to build the library. | |
3858 | ||
3859 | Here is an example of creating a DLL from a source file @samp{dll.c} and | |
3860 | also creating a program (from an object file called @samp{program.o}) | |
3861 | that uses that DLL: | |
3862 | ||
3863 | @smallexample | |
3864 | gcc -c dll.c | |
3865 | dlltool -e exports.o -l dll.lib dll.o | |
3866 | gcc dll.o exports.o -o dll.dll | |
3867 | gcc program.o dll.lib -o program | |
3868 | @end smallexample | |
3869 | ||
d4732f7c CW |
3870 | |
3871 | @command{dlltool} may also be used to query an existing import library | |
b3364cb9 | 3872 | to determine the name of the DLL to which it is associated. See the |
d4732f7c | 3873 | description of the @option{-I} or @option{--identify} option. |
b3364cb9 | 3874 | |
0285c67d NC |
3875 | @c man end |
3876 | ||
3877 | @c man begin OPTIONS dlltool | |
3878 | ||
252b5132 RH |
3879 | The command line options have the following meanings: |
3880 | ||
c7c55b78 | 3881 | @table @env |
252b5132 RH |
3882 | |
3883 | @item -d @var{filename} | |
3884 | @itemx --input-def @var{filename} | |
3885 | @cindex input .def file | |
2aa9814e | 3886 | Specifies the name of a @file{.def} file to be read in and processed. |
252b5132 RH |
3887 | |
3888 | @item -b @var{filename} | |
3889 | @itemx --base-file @var{filename} | |
3890 | @cindex base files | |
3891 | Specifies the name of a base file to be read in and processed. The | |
3892 | contents of this file will be added to the relocation section in the | |
3893 | exports file generated by dlltool. | |
3894 | ||
3895 | @item -e @var{filename} | |
3896 | @itemx --output-exp @var{filename} | |
3897 | Specifies the name of the export file to be created by dlltool. | |
3898 | ||
3899 | @item -z @var{filename} | |
3900 | @itemx --output-def @var{filename} | |
2aa9814e | 3901 | Specifies the name of the @file{.def} file to be created by dlltool. |
252b5132 RH |
3902 | |
3903 | @item -l @var{filename} | |
3904 | @itemx --output-lib @var{filename} | |
3905 | Specifies the name of the library file to be created by dlltool. | |
3906 | ||
10e636d2 DK |
3907 | @item -y @var{filename} |
3908 | @itemx --output-delaylib @var{filename} | |
3909 | Specifies the name of the delay-import library file to be created by dlltool. | |
3910 | ||
252b5132 RH |
3911 | @item --export-all-symbols |
3912 | Treat all global and weak defined symbols found in the input object | |
3913 | files as symbols to be exported. There is a small list of symbols which | |
c7c55b78 | 3914 | are not exported by default; see the @option{--no-default-excludes} |
252b5132 | 3915 | option. You may add to the list of symbols to not export by using the |
c7c55b78 | 3916 | @option{--exclude-symbols} option. |
252b5132 RH |
3917 | |
3918 | @item --no-export-all-symbols | |
2aa9814e | 3919 | Only export symbols explicitly listed in an input @file{.def} file or in |
252b5132 RH |
3920 | @samp{.drectve} sections in the input object files. This is the default |
3921 | behaviour. The @samp{.drectve} sections are created by @samp{dllexport} | |
3922 | attributes in the source code. | |
3923 | ||
3924 | @item --exclude-symbols @var{list} | |
3925 | Do not export the symbols in @var{list}. This is a list of symbol names | |
3926 | separated by comma or colon characters. The symbol names should not | |
3927 | contain a leading underscore. This is only meaningful when | |
c7c55b78 | 3928 | @option{--export-all-symbols} is used. |
252b5132 RH |
3929 | |
3930 | @item --no-default-excludes | |
c7c55b78 | 3931 | When @option{--export-all-symbols} is used, it will by default avoid |
252b5132 RH |
3932 | exporting certain special symbols. The current list of symbols to avoid |
3933 | exporting is @samp{DllMain@@12}, @samp{DllEntryPoint@@0}, | |
c7c55b78 | 3934 | @samp{impure_ptr}. You may use the @option{--no-default-excludes} option |
252b5132 | 3935 | to go ahead and export these special symbols. This is only meaningful |
c7c55b78 | 3936 | when @option{--export-all-symbols} is used. |
252b5132 RH |
3937 | |
3938 | @item -S @var{path} | |
3939 | @itemx --as @var{path} | |
3940 | Specifies the path, including the filename, of the assembler to be used | |
3941 | to create the exports file. | |
3942 | ||
6364e0b4 NC |
3943 | @item -f @var{options} |
3944 | @itemx --as-flags @var{options} | |
3945 | Specifies any specific command line options to be passed to the | |
252b5132 | 3946 | assembler when building the exports file. This option will work even if |
c7c55b78 | 3947 | the @option{-S} option is not used. This option only takes one argument, |
252b5132 RH |
3948 | and if it occurs more than once on the command line, then later |
3949 | occurrences will override earlier occurrences. So if it is necessary to | |
6364e0b4 | 3950 | pass multiple options to the assembler they should be enclosed in |
252b5132 RH |
3951 | double quotes. |
3952 | ||
3953 | @item -D @var{name} | |
3954 | @itemx --dll-name @var{name} | |
2aa9814e BE |
3955 | Specifies the name to be stored in the @file{.def} file as the name of |
3956 | the DLL when the @option{-e} option is used. If this option is not | |
3957 | present, then the filename given to the @option{-e} option will be | |
3958 | used as the name of the DLL. | |
252b5132 RH |
3959 | |
3960 | @item -m @var{machine} | |
3961 | @itemx -machine @var{machine} | |
3962 | Specifies the type of machine for which the library file should be | |
c7c55b78 | 3963 | built. @command{dlltool} has a built in default type, depending upon how |
252b5132 RH |
3964 | it was created, but this option can be used to override that. This is |
3965 | normally only useful when creating DLLs for an ARM processor, when the | |
c36774d6 | 3966 | contents of the DLL are actually encode using Thumb instructions. |
252b5132 RH |
3967 | |
3968 | @item -a | |
3969 | @itemx --add-indirect | |
c7c55b78 | 3970 | Specifies that when @command{dlltool} is creating the exports file it |
252b5132 RH |
3971 | should add a section which allows the exported functions to be |
3972 | referenced without using the import library. Whatever the hell that | |
c1c0eb9e | 3973 | means! |
252b5132 RH |
3974 | |
3975 | @item -U | |
3976 | @itemx --add-underscore | |
c7c55b78 | 3977 | Specifies that when @command{dlltool} is creating the exports file it |
c1c0eb9e | 3978 | should prepend an underscore to the names of @emph{all} exported symbols. |
14288fdc | 3979 | |
36d21de5 KT |
3980 | @item --no-leading-underscore |
3981 | @item --leading-underscore | |
3982 | Specifies whether standard symbol should be forced to be prefixed, or | |
3983 | not. | |
3984 | ||
14288fdc DS |
3985 | @item --add-stdcall-underscore |
3986 | Specifies that when @command{dlltool} is creating the exports file it | |
3987 | should prepend an underscore to the names of exported @emph{stdcall} | |
3988 | functions. Variable names and non-stdcall function names are not modified. | |
3989 | This option is useful when creating GNU-compatible import libs for third | |
3990 | party DLLs that were built with MS-Windows tools. | |
252b5132 RH |
3991 | |
3992 | @item -k | |
3993 | @itemx --kill-at | |
c7c55b78 | 3994 | Specifies that when @command{dlltool} is creating the exports file it |
d67a454c NC |
3995 | should not append the string @samp{@@ <number>}. These numbers are |
3996 | called ordinal numbers and they represent another way of accessing the | |
3997 | function in a DLL, other than by name. | |
252b5132 RH |
3998 | |
3999 | @item -A | |
4000 | @itemx --add-stdcall-alias | |
c7c55b78 | 4001 | Specifies that when @command{dlltool} is creating the exports file it |
252b5132 RH |
4002 | should add aliases for stdcall symbols without @samp{@@ <number>} |
4003 | in addition to the symbols with @samp{@@ <number>}. | |
4004 | ||
607dea97 NC |
4005 | @item -p |
4006 | @itemx --ext-prefix-alias @var{prefix} | |
4007 | Causes @command{dlltool} to create external aliases for all DLL | |
4008 | imports with the specified prefix. The aliases are created for both | |
4009 | external and import symbols with no leading underscore. | |
4010 | ||
252b5132 RH |
4011 | @item -x |
4012 | @itemx --no-idata4 | |
c7c55b78 NC |
4013 | Specifies that when @command{dlltool} is creating the exports and library |
4014 | files it should omit the @code{.idata4} section. This is for compatibility | |
252b5132 RH |
4015 | with certain operating systems. |
4016 | ||
e77b97d4 KT |
4017 | @item --use-nul-prefixed-import-tables |
4018 | Specifies that when @command{dlltool} is creating the exports and library | |
4019 | files it should prefix the @code{.idata4} and @code{.idata5} by zero an | |
4020 | element. This emulates old gnu import library generation of | |
4021 | @code{dlltool}. By default this option is turned off. | |
4022 | ||
252b5132 RH |
4023 | @item -c |
4024 | @itemx --no-idata5 | |
c7c55b78 NC |
4025 | Specifies that when @command{dlltool} is creating the exports and library |
4026 | files it should omit the @code{.idata5} section. This is for compatibility | |
252b5132 RH |
4027 | with certain operating systems. |
4028 | ||
d4732f7c CW |
4029 | @item -I @var{filename} |
4030 | @itemx --identify @var{filename} | |
4031 | Specifies that @command{dlltool} should inspect the import library | |
71c57c16 NC |
4032 | indicated by @var{filename} and report, on @code{stdout}, the name(s) |
4033 | of the associated DLL(s). This can be performed in addition to any | |
4034 | other operations indicated by the other options and arguments. | |
4035 | @command{dlltool} fails if the import library does not exist or is not | |
4036 | actually an import library. See also @option{--identify-strict}. | |
4037 | ||
4038 | @item --identify-strict | |
4039 | Modifies the behavior of the @option{--identify} option, such | |
4040 | that an error is reported if @var{filename} is associated with | |
4041 | more than one DLL. | |
d4732f7c | 4042 | |
252b5132 RH |
4043 | @item -i |
4044 | @itemx --interwork | |
c7c55b78 | 4045 | Specifies that @command{dlltool} should mark the objects in the library |
252b5132 | 4046 | file and exports file that it produces as supporting interworking |
c36774d6 | 4047 | between ARM and Thumb code. |
252b5132 RH |
4048 | |
4049 | @item -n | |
4050 | @itemx --nodelete | |
c7c55b78 | 4051 | Makes @command{dlltool} preserve the temporary assembler files it used to |
252b5132 RH |
4052 | create the exports file. If this option is repeated then dlltool will |
4053 | also preserve the temporary object files it uses to create the library | |
f9346411 DS |
4054 | file. |
4055 | ||
4056 | @item -t @var{prefix} | |
4057 | @itemx --temp-prefix @var{prefix} | |
4058 | Makes @command{dlltool} use @var{prefix} when constructing the names of | |
4059 | temporary assembler and object files. By default, the temp file prefix | |
c1c0eb9e | 4060 | is generated from the pid. |
252b5132 RH |
4061 | |
4062 | @item -v | |
4063 | @itemx --verbose | |
4064 | Make dlltool describe what it is doing. | |
4065 | ||
4066 | @item -h | |
4067 | @itemx --help | |
4068 | Displays a list of command line options and then exits. | |
4069 | ||
4070 | @item -V | |
4071 | @itemx --version | |
4072 | Displays dlltool's version number and then exits. | |
4073 | ||
4074 | @end table | |
4075 | ||
0285c67d NC |
4076 | @c man end |
4077 | ||
2aa9814e BE |
4078 | @menu |
4079 | * def file format:: The format of the dlltool @file{.def} file | |
4080 | @end menu | |
4081 | ||
4082 | @node def file format | |
4083 | @section The format of the @command{dlltool} @file{.def} file | |
4084 | ||
4085 | A @file{.def} file contains any number of the following commands: | |
4086 | ||
4087 | @table @asis | |
4088 | ||
4089 | @item @code{NAME} @var{name} @code{[ ,} @var{base} @code{]} | |
4090 | The result is going to be named @var{name}@code{.exe}. | |
4091 | ||
4092 | @item @code{LIBRARY} @var{name} @code{[ ,} @var{base} @code{]} | |
4093 | The result is going to be named @var{name}@code{.dll}. | |
5b3d386e KT |
4094 | Note: If you want to use LIBRARY as name then you need to quote. Otherwise |
4095 | this will fail due a necessary hack for libtool (see PR binutils/13710 for more | |
4096 | details). | |
2aa9814e | 4097 | |
bf201fdd | 4098 | @item @code{EXPORTS ( ( (} @var{name1} @code{[ = } @var{name2} @code{] ) | ( } @var{name1} @code{=} @var{module-name} @code{.} @var{external-name} @code{) ) [ == } @var{its_name} @code{]} |
2aa9814e BE |
4099 | @item @code{[} @var{integer} @code{] [ NONAME ] [ CONSTANT ] [ DATA ] [ PRIVATE ] ) *} |
4100 | Declares @var{name1} as an exported symbol from the DLL, with optional | |
4101 | ordinal number @var{integer}, or declares @var{name1} as an alias | |
bf201fdd KT |
4102 | (forward) of the function @var{external-name} in the DLL. |
4103 | If @var{its_name} is specified, this name is used as string in export table. | |
2aa9814e | 4104 | @var{module-name}. |
5b3d386e KT |
4105 | Note: The @code{EXPORTS} has to be the last command in .def file, as keywords |
4106 | are treated - beside @code{LIBRARY} - as simple name-identifiers. | |
4107 | If you want to use LIBRARY as name then you need to quote it. | |
2aa9814e | 4108 | |
bf201fdd | 4109 | @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{]} *} |
2aa9814e BE |
4110 | Declares that @var{external-name} or the exported function whose |
4111 | ordinal number is @var{integer} is to be imported from the file | |
4112 | @var{module-name}. If @var{internal-name} is specified then this is | |
4113 | the name that the imported function will be referred to in the body of | |
4114 | the DLL. | |
bf201fdd | 4115 | If @var{its_name} is specified, this name is used as string in import table. |
5b3d386e KT |
4116 | Note: The @code{IMPORTS} has to be the last command in .def file, as keywords |
4117 | are treated - beside @code{LIBRARY} - as simple name-identifiers. | |
4118 | If you want to use LIBRARY as name then you need to quote it. | |
2aa9814e BE |
4119 | |
4120 | @item @code{DESCRIPTION} @var{string} | |
4121 | Puts @var{string} into the output @file{.exp} file in the | |
4122 | @code{.rdata} section. | |
4123 | ||
4124 | @item @code{STACKSIZE} @var{number-reserve} @code{[, } @var{number-commit} @code{]} | |
4125 | @item @code{HEAPSIZE} @var{number-reserve} @code{[, } @var{number-commit} @code{]} | |
4126 | Generates @code{--stack} or @code{--heap} | |
4127 | @var{number-reserve},@var{number-commit} in the output @code{.drectve} | |
4128 | section. The linker will see this and act upon it. | |
4129 | ||
4130 | @item @code{CODE} @var{attr} @code{+} | |
4131 | @item @code{DATA} @var{attr} @code{+} | |
4132 | @item @code{SECTIONS (} @var{section-name} @var{attr}@code{ + ) *} | |
4133 | Generates @code{--attr} @var{section-name} @var{attr} in the output | |
4134 | @code{.drectve} section, where @var{attr} is one of @code{READ}, | |
4135 | @code{WRITE}, @code{EXECUTE} or @code{SHARED}. The linker will see | |
4136 | this and act upon it. | |
4137 | ||
4138 | @end table | |
4139 | ||
0285c67d NC |
4140 | @ignore |
4141 | @c man begin SEEALSO dlltool | |
2aa9814e | 4142 | The Info pages for @file{binutils}. |
0285c67d NC |
4143 | @c man end |
4144 | @end ignore | |
4145 | ||
252b5132 RH |
4146 | @node readelf |
4147 | @chapter readelf | |
4148 | ||
4149 | @cindex ELF file information | |
4150 | @kindex readelf | |
4151 | ||
0285c67d NC |
4152 | @c man title readelf Displays information about ELF files. |
4153 | ||
252b5132 | 4154 | @smallexample |
0285c67d | 4155 | @c man begin SYNOPSIS readelf |
c1c0eb9e | 4156 | readelf [@option{-a}|@option{--all}] |
c7c55b78 NC |
4157 | [@option{-h}|@option{--file-header}] |
4158 | [@option{-l}|@option{--program-headers}|@option{--segments}] | |
4159 | [@option{-S}|@option{--section-headers}|@option{--sections}] | |
81fc812e | 4160 | [@option{-g}|@option{--section-groups}] |
5477e8a0 | 4161 | [@option{-t}|@option{--section-details}] |
c7c55b78 NC |
4162 | [@option{-e}|@option{--headers}] |
4163 | [@option{-s}|@option{--syms}|@option{--symbols}] | |
2c610e4b | 4164 | [@option{--dyn-syms}] |
c7c55b78 NC |
4165 | [@option{-n}|@option{--notes}] |
4166 | [@option{-r}|@option{--relocs}] | |
4167 | [@option{-u}|@option{--unwind}] | |
4168 | [@option{-d}|@option{--dynamic}] | |
4169 | [@option{-V}|@option{--version-info}] | |
947ed062 | 4170 | [@option{-A}|@option{--arch-specific}] |
c7c55b78 | 4171 | [@option{-D}|@option{--use-dynamic}] |
aef1f6d0 | 4172 | [@option{-x} <number or name>|@option{--hex-dump=}<number or name>] |
09c11c86 | 4173 | [@option{-p} <number or name>|@option{--string-dump=}<number or name>] |
cf13d699 | 4174 | [@option{-R} <number or name>|@option{--relocated-dump=}<number or name>] |
4145f1d5 | 4175 | [@option{-c}|@option{--archive-index}] |
f9f0e732 | 4176 | [@option{-w[lLiaprmfFsoRt]}| |
5bbdf3d5 | 4177 | @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]] |
fd2f0033 TT |
4178 | [@option{--dwarf-depth=@var{n}}] |
4179 | [@option{--dwarf-start=@var{n}}] | |
ed22650e | 4180 | [@option{-I}|@option{--histogram}] |
c7c55b78 | 4181 | [@option{-v}|@option{--version}] |
d974e256 | 4182 | [@option{-W}|@option{--wide}] |
c7c55b78 | 4183 | [@option{-H}|@option{--help}] |
252b5132 | 4184 | @var{elffile}@dots{} |
0285c67d | 4185 | @c man end |
252b5132 RH |
4186 | @end smallexample |
4187 | ||
0285c67d NC |
4188 | @c man begin DESCRIPTION readelf |
4189 | ||
c7c55b78 | 4190 | @command{readelf} displays information about one or more ELF format object |
252b5132 RH |
4191 | files. The options control what particular information to display. |
4192 | ||
fb52b2f4 NC |
4193 | @var{elffile}@dots{} are the object files to be examined. 32-bit and |
4194 | 64-bit ELF files are supported, as are archives containing ELF files. | |
252b5132 | 4195 | |
9eb20dd8 NC |
4196 | This program performs a similar function to @command{objdump} but it |
4197 | goes into more detail and it exists independently of the @sc{bfd} | |
4198 | library, so if there is a bug in @sc{bfd} then readelf will not be | |
4199 | affected. | |
4200 | ||
0285c67d NC |
4201 | @c man end |
4202 | ||
4203 | @c man begin OPTIONS readelf | |
4204 | ||
252b5132 RH |
4205 | The long and short forms of options, shown here as alternatives, are |
4206 | equivalent. At least one option besides @samp{-v} or @samp{-H} must be | |
c1c0eb9e | 4207 | given. |
252b5132 | 4208 | |
c7c55b78 | 4209 | @table @env |
252b5132 RH |
4210 | @item -a |
4211 | @itemx --all | |
d95ef3ab | 4212 | Equivalent to specifying @option{--file-header}, |
c7c55b78 NC |
4213 | @option{--program-headers}, @option{--sections}, @option{--symbols}, |
4214 | @option{--relocs}, @option{--dynamic}, @option{--notes} and | |
c1c0eb9e | 4215 | @option{--version-info}. |
252b5132 RH |
4216 | |
4217 | @item -h | |
4218 | @itemx --file-header | |
4219 | @cindex ELF file header information | |
4220 | Displays the information contained in the ELF header at the start of the | |
4221 | file. | |
4222 | ||
4223 | @item -l | |
4224 | @itemx --program-headers | |
4225 | @itemx --segments | |
4226 | @cindex ELF program header information | |
4227 | @cindex ELF segment information | |
4228 | Displays the information contained in the file's segment headers, if it | |
4229 | has any. | |
4230 | ||
4231 | @item -S | |
4232 | @itemx --sections | |
4233 | @itemx --section-headers | |
4234 | @cindex ELF section information | |
4235 | Displays the information contained in the file's section headers, if it | |
4236 | has any. | |
4237 | ||
81fc812e L |
4238 | @item -g |
4239 | @itemx --section-groups | |
4240 | @cindex ELF section group information | |
4241 | Displays the information contained in the file's section groups, if it | |
4242 | has any. | |
4243 | ||
5477e8a0 L |
4244 | @item -t |
4245 | @itemx --section-details | |
4246 | @cindex ELF section information | |
4247 | Displays the detailed section information. Implies @option{-S}. | |
81fc812e | 4248 | |
252b5132 RH |
4249 | @item -s |
4250 | @itemx --symbols | |
4251 | @itemx --syms | |
4252 | @cindex ELF symbol table information | |
4253 | Displays the entries in symbol table section of the file, if it has one. | |
4254 | ||
2c610e4b L |
4255 | @item --dyn-syms |
4256 | @cindex ELF dynamic symbol table information | |
4257 | Displays the entries in dynamic symbol table section of the file, if it | |
4258 | has one. | |
4259 | ||
252b5132 RH |
4260 | @item -e |
4261 | @itemx --headers | |
c7c55b78 | 4262 | Display all the headers in the file. Equivalent to @option{-h -l -S}. |
252b5132 | 4263 | |
779fe533 NC |
4264 | @item -n |
4265 | @itemx --notes | |
1ec5cd37 NC |
4266 | @cindex ELF notes |
4267 | Displays the contents of the NOTE segments and/or sections, if any. | |
779fe533 | 4268 | |
252b5132 RH |
4269 | @item -r |
4270 | @itemx --relocs | |
4271 | @cindex ELF reloc information | |
f5e21966 NC |
4272 | Displays the contents of the file's relocation section, if it has one. |
4273 | ||
4274 | @item -u | |
4275 | @itemx --unwind | |
4276 | @cindex unwind information | |
4277 | Displays the contents of the file's unwind section, if it has one. Only | |
ba7f2642 TS |
4278 | the unwind sections for IA64 ELF files, as well as ARM unwind tables |
4279 | (@code{.ARM.exidx} / @code{.ARM.extab}) are currently supported. | |
252b5132 RH |
4280 | |
4281 | @item -d | |
4282 | @itemx --dynamic | |
4283 | @cindex ELF dynamic section information | |
4284 | Displays the contents of the file's dynamic section, if it has one. | |
4285 | ||
4286 | @item -V | |
4287 | @itemx --version-info | |
a8685210 | 4288 | @cindex ELF version sections information |
252b5132 RH |
4289 | Displays the contents of the version sections in the file, it they |
4290 | exist. | |
4291 | ||
947ed062 NC |
4292 | @item -A |
4293 | @itemx --arch-specific | |
4294 | Displays architecture-specific information in the file, if there | |
4295 | is any. | |
4296 | ||
252b5132 RH |
4297 | @item -D |
4298 | @itemx --use-dynamic | |
c7c55b78 | 4299 | When displaying symbols, this option makes @command{readelf} use the |
2c610e4b L |
4300 | symbol hash tables in the file's dynamic section, rather than the |
4301 | symbol table sections. | |
252b5132 | 4302 | |
aef1f6d0 DJ |
4303 | @item -x <number or name> |
4304 | @itemx --hex-dump=<number or name> | |
cf13d699 | 4305 | Displays the contents of the indicated section as a hexadecimal bytes. |
aef1f6d0 DJ |
4306 | A number identifies a particular section by index in the section table; |
4307 | any other string identifies all sections with that name in the object file. | |
252b5132 | 4308 | |
cf13d699 NC |
4309 | @item -R <number or name> |
4310 | @itemx --relocated-dump=<number or name> | |
4311 | Displays the contents of the indicated section as a hexadecimal | |
4312 | bytes. A number identifies a particular section by index in the | |
4313 | section table; any other string identifies all sections with that name | |
4314 | in the object file. The contents of the section will be relocated | |
4315 | before they are displayed. | |
4316 | ||
09c11c86 NC |
4317 | @item -p <number or name> |
4318 | @itemx --string-dump=<number or name> | |
4319 | Displays the contents of the indicated section as printable strings. | |
4320 | A number identifies a particular section by index in the section table; | |
4321 | any other string identifies all sections with that name in the object file. | |
4322 | ||
4145f1d5 NC |
4323 | @item -c |
4324 | @itemx --archive-index | |
4325 | @cindex Archive file symbol index information | |
a8685210 | 4326 | Displays the file symbol index information contained in the header part |
4145f1d5 NC |
4327 | of binary archives. Performs the same function as the @option{t} |
4328 | command to @command{ar}, but without using the BFD library. @xref{ar}. | |
4329 | ||
f9f0e732 | 4330 | @item -w[lLiaprmfFsoRt] |
5bbdf3d5 | 4331 | @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] |
252b5132 RH |
4332 | Displays the contents of the debug sections in the file, if any are |
4333 | present. If one of the optional letters or words follows the switch | |
4334 | then only data found in those specific sections will be dumped. | |
4335 | ||
6f875884 | 4336 | Note that there is no single letter option to display the content of |
5bbdf3d5 | 4337 | trace sections or .gdb_index. |
6f875884 | 4338 | |
a262ae96 NC |
4339 | Note: the @option{=decodedline} option will display the interpreted |
4340 | contents of a .debug_line section whereas the @option{=rawline} option | |
4341 | dumps the contents in a raw format. | |
4342 | ||
1ed06042 NC |
4343 | Note: the @option{=frames-interp} option will display the interpreted |
4344 | contents of a .debug_frame section whereas the @option{=frames} option | |
4345 | dumps the contents in a raw format. | |
4346 | ||
fd2f0033 TT |
4347 | Note: the output from the @option{=info} option can also be affected |
4348 | by the options @option{--dwarf-depth} and @option{--dwarf-start}. | |
4349 | ||
4350 | @item --dwarf-depth=@var{n} | |
4351 | Limit the dump of the @code{.debug_info} section to @var{n} children. | |
4352 | This is only useful with @option{--debug-dump=info}. The default is | |
4353 | to print all DIEs; the special value 0 for @var{n} will also have this | |
4354 | effect. | |
4355 | ||
4356 | With a non-zero value for @var{n}, DIEs at or deeper than @var{n} | |
4357 | levels will not be printed. The range for @var{n} is zero-based. | |
4358 | ||
4359 | @item --dwarf-start=@var{n} | |
4360 | Print only DIEs beginning with the DIE numbered @var{n}. This is only | |
4361 | useful with @option{--debug-dump=info}. | |
4362 | ||
4363 | If specified, this option will suppress printing of any header | |
4364 | information and all DIEs before the DIE numbered @var{n}. Only | |
4365 | siblings and children of the specified DIE will be printed. | |
4366 | ||
4367 | This can be used in conjunction with @option{--dwarf-depth}. | |
4368 | ||
947ed062 NC |
4369 | @item -I |
4370 | @itemx --histogram | |
252b5132 RH |
4371 | Display a histogram of bucket list lengths when displaying the contents |
4372 | of the symbol tables. | |
4373 | ||
4374 | @item -v | |
4375 | @itemx --version | |
4376 | Display the version number of readelf. | |
4377 | ||
d974e256 JJ |
4378 | @item -W |
4379 | @itemx --wide | |
4380 | Don't break output lines to fit into 80 columns. By default | |
4381 | @command{readelf} breaks section header and segment listing lines for | |
4382 | 64-bit ELF files, so that they fit into 80 columns. This option causes | |
4383 | @command{readelf} to print each section header resp. each segment one a | |
4384 | single line, which is far more readable on terminals wider than 80 columns. | |
4385 | ||
252b5132 RH |
4386 | @item -H |
4387 | @itemx --help | |
c7c55b78 | 4388 | Display the command line options understood by @command{readelf}. |
252b5132 RH |
4389 | |
4390 | @end table | |
4391 | ||
0285c67d NC |
4392 | @c man end |
4393 | ||
4394 | @ignore | |
4395 | @c man begin SEEALSO readelf | |
4396 | objdump(1), and the Info entries for @file{binutils}. | |
4397 | @c man end | |
4398 | @end ignore | |
252b5132 | 4399 | |
30fd33bb L |
4400 | @node elfedit |
4401 | @chapter elfedit | |
4402 | ||
4403 | @cindex Update ELF header | |
4404 | @kindex elfedit | |
4405 | ||
4406 | @c man title elfedit Update the ELF header of ELF files. | |
4407 | ||
4408 | @smallexample | |
4409 | @c man begin SYNOPSIS elfedit | |
4410 | elfedit [@option{--input-mach=}@var{machine}] | |
dd35de74 | 4411 | [@option{--input-type=}@var{type}] |
08ebfb8c | 4412 | [@option{--input-osabi=}@var{osabi}] |
c7a795f8 | 4413 | @option{--output-mach=}@var{machine} |
dd35de74 | 4414 | @option{--output-type=}@var{type} |
08ebfb8c | 4415 | @option{--output-osabi=}@var{osabi} |
30fd33bb L |
4416 | [@option{-v}|@option{--version}] |
4417 | [@option{-h}|@option{--help}] | |
4418 | @var{elffile}@dots{} | |
4419 | @c man end | |
4420 | @end smallexample | |
4421 | ||
4422 | @c man begin DESCRIPTION elfedit | |
4423 | ||
dd35de74 L |
4424 | @command{elfedit} updates the ELF header of ELF files which have |
4425 | the matching ELF machine and file types. The options control how and | |
4426 | which fields in the ELF header should be updated. | |
30fd33bb L |
4427 | |
4428 | @var{elffile}@dots{} are the ELF files to be updated. 32-bit and | |
4429 | 64-bit ELF files are supported, as are archives containing ELF files. | |
4430 | @c man end | |
4431 | ||
4432 | @c man begin OPTIONS elfedit | |
4433 | ||
4434 | The long and short forms of options, shown here as alternatives, are | |
d0514c49 L |
4435 | equivalent. At least one of the @option{--output-mach}, |
4436 | @option{--output-type} and @option{--output-osabi} options must be given. | |
30fd33bb L |
4437 | |
4438 | @table @env | |
4439 | ||
574b25e8 | 4440 | @item --input-mach=@var{machine} |
dd35de74 L |
4441 | Set the matching input ELF machine type to @var{machine}. If |
4442 | @option{--input-mach} isn't specified, it will match any ELF | |
4443 | machine types. | |
30fd33bb | 4444 | |
7a9068fe L |
4445 | The supported ELF machine types are, @var{L1OM}, @var{K1OM} and |
4446 | @var{x86-64}. | |
30fd33bb | 4447 | |
574b25e8 | 4448 | @item --output-mach=@var{machine} |
30fd33bb L |
4449 | Change the ELF machine type in the ELF header to @var{machine}. The |
4450 | supported ELF machine types are the same as @option{--input-mach}. | |
4451 | ||
574b25e8 | 4452 | @item --input-type=@var{type} |
dd35de74 L |
4453 | Set the matching input ELF file type to @var{type}. If |
4454 | @option{--input-type} isn't specified, it will match any ELF file types. | |
4455 | ||
4456 | The supported ELF file types are, @var{rel}, @var{exec} and @var{dyn}. | |
4457 | ||
574b25e8 | 4458 | @item --output-type=@var{type} |
dd35de74 L |
4459 | Change the ELF file type in the ELF header to @var{type}. The |
4460 | supported ELF types are the same as @option{--input-type}. | |
4461 | ||
574b25e8 | 4462 | @item --input-osabi=@var{osabi} |
08ebfb8c | 4463 | Set the matching input ELF file OSABI to @var{osabi}. If |
d0514c49 L |
4464 | @option{--input-osabi} isn't specified, it will match any ELF OSABIs. |
4465 | ||
4466 | The supported ELF OSABIs are, @var{none}, @var{HPUX}, @var{NetBSD}, | |
9c55345c TS |
4467 | @var{GNU}, @var{Linux} (alias for @var{GNU}), |
4468 | @var{Solaris}, @var{AIX}, @var{Irix}, | |
d0514c49 L |
4469 | @var{FreeBSD}, @var{TRU64}, @var{Modesto}, @var{OpenBSD}, @var{OpenVMS}, |
4470 | @var{NSK}, @var{AROS} and @var{FenixOS}. | |
4471 | ||
574b25e8 | 4472 | @item --output-osabi=@var{osabi} |
08ebfb8c | 4473 | Change the ELF OSABI in the ELF header to @var{osabi}. The |
d0514c49 L |
4474 | supported ELF OSABI are the same as @option{--input-osabi}. |
4475 | ||
30fd33bb L |
4476 | @item -v |
4477 | @itemx --version | |
4478 | Display the version number of @command{elfedit}. | |
4479 | ||
4480 | @item -h | |
4481 | @itemx --help | |
4482 | Display the command line options understood by @command{elfedit}. | |
4483 | ||
4484 | @end table | |
4485 | ||
4486 | @c man end | |
4487 | ||
4488 | @ignore | |
4489 | @c man begin SEEALSO elfedit | |
4490 | readelf(1), and the Info entries for @file{binutils}. | |
4491 | @c man end | |
4492 | @end ignore | |
4493 | ||
07012eee MM |
4494 | @node Common Options |
4495 | @chapter Common Options | |
4496 | ||
4497 | The following command-line options are supported by all of the | |
4498 | programs described in this manual. | |
4499 | ||
dff70155 | 4500 | @c man begin OPTIONS |
07012eee | 4501 | @table @env |
38fc1cb1 | 4502 | @include at-file.texi |
dff70155 | 4503 | @c man end |
07012eee MM |
4504 | |
4505 | @item --help | |
4506 | Display the command-line options supported by the program. | |
4507 | ||
4508 | @item --version | |
4509 | Display the version number of the program. | |
4510 | ||
dff70155 | 4511 | @c man begin OPTIONS |
07012eee | 4512 | @end table |
dff70155 | 4513 | @c man end |
07012eee | 4514 | |
fff279a7 | 4515 | @node Selecting the Target System |
947ed062 | 4516 | @chapter Selecting the Target System |
252b5132 | 4517 | |
947ed062 | 4518 | You can specify two aspects of the target system to the @sc{gnu} |
252b5132 RH |
4519 | binary file utilities, each in several ways: |
4520 | ||
4521 | @itemize @bullet | |
4522 | @item | |
4523 | the target | |
4524 | ||
4525 | @item | |
4526 | the architecture | |
252b5132 RH |
4527 | @end itemize |
4528 | ||
4529 | In the following summaries, the lists of ways to specify values are in | |
4530 | order of decreasing precedence. The ways listed first override those | |
4531 | listed later. | |
4532 | ||
4533 | The commands to list valid values only list the values for which the | |
4534 | programs you are running were configured. If they were configured with | |
c7c55b78 | 4535 | @option{--enable-targets=all}, the commands list most of the available |
252b5132 RH |
4536 | values, but a few are left out; not all targets can be configured in at |
4537 | once because some of them can only be configured @dfn{native} (on hosts | |
4538 | with the same type as the target system). | |
4539 | ||
4540 | @menu | |
c1c0eb9e RM |
4541 | * Target Selection:: |
4542 | * Architecture Selection:: | |
252b5132 RH |
4543 | @end menu |
4544 | ||
4545 | @node Target Selection | |
4546 | @section Target Selection | |
4547 | ||
4548 | A @dfn{target} is an object file format. A given target may be | |
4549 | supported for multiple architectures (@pxref{Architecture Selection}). | |
4550 | A target selection may also have variations for different operating | |
4551 | systems or architectures. | |
4552 | ||
4553 | The command to list valid target values is @samp{objdump -i} | |
4554 | (the first column of output contains the relevant information). | |
4555 | ||
4556 | Some sample values are: @samp{a.out-hp300bsd}, @samp{ecoff-littlemips}, | |
4557 | @samp{a.out-sunos-big}. | |
4558 | ||
4559 | You can also specify a target using a configuration triplet. This is | |
f20a759a ILT |
4560 | the same sort of name that is passed to @file{configure} to specify a |
4561 | target. When you use a configuration triplet as an argument, it must be | |
4562 | fully canonicalized. You can see the canonical version of a triplet by | |
252b5132 RH |
4563 | running the shell script @file{config.sub} which is included with the |
4564 | sources. | |
4565 | ||
4566 | Some sample configuration triplets are: @samp{m68k-hp-bsd}, | |
4567 | @samp{mips-dec-ultrix}, @samp{sparc-sun-sunos}. | |
4568 | ||
c7c55b78 | 4569 | @subheading @command{objdump} Target |
252b5132 RH |
4570 | |
4571 | Ways to specify: | |
4572 | ||
4573 | @enumerate | |
4574 | @item | |
c7c55b78 | 4575 | command line option: @option{-b} or @option{--target} |
252b5132 RH |
4576 | |
4577 | @item | |
4578 | environment variable @code{GNUTARGET} | |
4579 | ||
4580 | @item | |
4581 | deduced from the input file | |
4582 | @end enumerate | |
4583 | ||
c7c55b78 | 4584 | @subheading @command{objcopy} and @command{strip} Input Target |
252b5132 RH |
4585 | |
4586 | Ways to specify: | |
4587 | ||
4588 | @enumerate | |
4589 | @item | |
c7c55b78 | 4590 | command line options: @option{-I} or @option{--input-target}, or @option{-F} or @option{--target} |
252b5132 RH |
4591 | |
4592 | @item | |
4593 | environment variable @code{GNUTARGET} | |
4594 | ||
4595 | @item | |
4596 | deduced from the input file | |
4597 | @end enumerate | |
4598 | ||
c7c55b78 | 4599 | @subheading @command{objcopy} and @command{strip} Output Target |
252b5132 RH |
4600 | |
4601 | Ways to specify: | |
4602 | ||
4603 | @enumerate | |
4604 | @item | |
c7c55b78 | 4605 | command line options: @option{-O} or @option{--output-target}, or @option{-F} or @option{--target} |
252b5132 RH |
4606 | |
4607 | @item | |
c7c55b78 | 4608 | the input target (see ``@command{objcopy} and @command{strip} Input Target'' above) |
252b5132 RH |
4609 | |
4610 | @item | |
4611 | environment variable @code{GNUTARGET} | |
4612 | ||
4613 | @item | |
4614 | deduced from the input file | |
4615 | @end enumerate | |
4616 | ||
c7c55b78 | 4617 | @subheading @command{nm}, @command{size}, and @command{strings} Target |
252b5132 RH |
4618 | |
4619 | Ways to specify: | |
4620 | ||
4621 | @enumerate | |
4622 | @item | |
c7c55b78 | 4623 | command line option: @option{--target} |
252b5132 RH |
4624 | |
4625 | @item | |
4626 | environment variable @code{GNUTARGET} | |
4627 | ||
4628 | @item | |
4629 | deduced from the input file | |
4630 | @end enumerate | |
4631 | ||
252b5132 | 4632 | @node Architecture Selection |
947ed062 | 4633 | @section Architecture Selection |
252b5132 RH |
4634 | |
4635 | An @dfn{architecture} is a type of @sc{cpu} on which an object file is | |
4636 | to run. Its name may contain a colon, separating the name of the | |
4637 | processor family from the name of the particular @sc{cpu}. | |
4638 | ||
4639 | The command to list valid architecture values is @samp{objdump -i} (the | |
4640 | second column contains the relevant information). | |
4641 | ||
4642 | Sample values: @samp{m68k:68020}, @samp{mips:3000}, @samp{sparc}. | |
4643 | ||
c7c55b78 | 4644 | @subheading @command{objdump} Architecture |
252b5132 RH |
4645 | |
4646 | Ways to specify: | |
4647 | ||
4648 | @enumerate | |
4649 | @item | |
c7c55b78 | 4650 | command line option: @option{-m} or @option{--architecture} |
252b5132 RH |
4651 | |
4652 | @item | |
4653 | deduced from the input file | |
4654 | @end enumerate | |
4655 | ||
c7c55b78 | 4656 | @subheading @command{objcopy}, @command{nm}, @command{size}, @command{strings} Architecture |
252b5132 RH |
4657 | |
4658 | Ways to specify: | |
4659 | ||
4660 | @enumerate | |
4661 | @item | |
4662 | deduced from the input file | |
4663 | @end enumerate | |
4664 | ||
252b5132 RH |
4665 | @node Reporting Bugs |
4666 | @chapter Reporting Bugs | |
4667 | @cindex bugs | |
4668 | @cindex reporting bugs | |
4669 | ||
4670 | Your bug reports play an essential role in making the binary utilities | |
4671 | reliable. | |
4672 | ||
4673 | Reporting a bug may help you by bringing a solution to your problem, or | |
4674 | it may not. But in any case the principal function of a bug report is | |
4675 | to help the entire community by making the next version of the binary | |
4676 | utilities work better. Bug reports are your contribution to their | |
4677 | maintenance. | |
4678 | ||
4679 | In order for a bug report to serve its purpose, you must include the | |
4680 | information that enables us to fix the bug. | |
4681 | ||
4682 | @menu | |
4683 | * Bug Criteria:: Have you found a bug? | |
4684 | * Bug Reporting:: How to report bugs | |
4685 | @end menu | |
4686 | ||
4687 | @node Bug Criteria | |
947ed062 | 4688 | @section Have You Found a Bug? |
252b5132 RH |
4689 | @cindex bug criteria |
4690 | ||
4691 | If you are not sure whether you have found a bug, here are some guidelines: | |
4692 | ||
4693 | @itemize @bullet | |
4694 | @cindex fatal signal | |
4695 | @cindex crash | |
4696 | @item | |
4697 | If a binary utility gets a fatal signal, for any input whatever, that is | |
4698 | a bug. Reliable utilities never crash. | |
4699 | ||
4700 | @cindex error on valid input | |
4701 | @item | |
4702 | If a binary utility produces an error message for valid input, that is a | |
4703 | bug. | |
4704 | ||
4705 | @item | |
4706 | If you are an experienced user of binary utilities, your suggestions for | |
4707 | improvement are welcome in any case. | |
4708 | @end itemize | |
4709 | ||
4710 | @node Bug Reporting | |
947ed062 | 4711 | @section How to Report Bugs |
252b5132 RH |
4712 | @cindex bug reports |
4713 | @cindex bugs, reporting | |
4714 | ||
4715 | A number of companies and individuals offer support for @sc{gnu} | |
4716 | products. If you obtained the binary utilities from a support | |
4717 | organization, we recommend you contact that organization first. | |
4718 | ||
4719 | You can find contact information for many support companies and | |
4720 | individuals in the file @file{etc/SERVICE} in the @sc{gnu} Emacs | |
4721 | distribution. | |
4722 | ||
ad22bfe8 | 4723 | @ifset BUGURL |
252b5132 | 4724 | In any event, we also recommend that you send bug reports for the binary |
ad22bfe8 JM |
4725 | utilities to @value{BUGURL}. |
4726 | @end ifset | |
252b5132 RH |
4727 | |
4728 | The fundamental principle of reporting bugs usefully is this: | |
4729 | @strong{report all the facts}. If you are not sure whether to state a | |
4730 | fact or leave it out, state it! | |
4731 | ||
4732 | Often people omit facts because they think they know what causes the | |
4733 | problem and assume that some details do not matter. Thus, you might | |
4734 | assume that the name of a file you use in an example does not matter. | |
4735 | Well, probably it does not, but one cannot be sure. Perhaps the bug is | |
4736 | a stray memory reference which happens to fetch from the location where | |
4737 | that pathname is stored in memory; perhaps, if the pathname were | |
4738 | different, the contents of that location would fool the utility into | |
4739 | doing the right thing despite the bug. Play it safe and give a | |
4740 | specific, complete example. That is the easiest thing for you to do, | |
4741 | and the most helpful. | |
4742 | ||
4743 | Keep in mind that the purpose of a bug report is to enable us to fix the bug if | |
4744 | it is new to us. Therefore, always write your bug reports on the assumption | |
4745 | that the bug has not been reported previously. | |
4746 | ||
4747 | Sometimes people give a few sketchy facts and ask, ``Does this ring a | |
947ed062 NC |
4748 | bell?'' This cannot help us fix a bug, so it is basically useless. We |
4749 | respond by asking for enough details to enable us to investigate. | |
4750 | You might as well expedite matters by sending them to begin with. | |
252b5132 RH |
4751 | |
4752 | To enable us to fix the bug, you should include all these things: | |
4753 | ||
4754 | @itemize @bullet | |
4755 | @item | |
4756 | The version of the utility. Each utility announces it if you start it | |
c7c55b78 | 4757 | with the @option{--version} argument. |
252b5132 RH |
4758 | |
4759 | Without this, we will not know whether there is any point in looking for | |
4760 | the bug in the current version of the binary utilities. | |
4761 | ||
4762 | @item | |
4763 | Any patches you may have applied to the source, including any patches | |
4764 | made to the @code{BFD} library. | |
4765 | ||
4766 | @item | |
4767 | The type of machine you are using, and the operating system name and | |
4768 | version number. | |
4769 | ||
4770 | @item | |
4771 | What compiler (and its version) was used to compile the utilities---e.g. | |
4772 | ``@code{gcc-2.7}''. | |
4773 | ||
4774 | @item | |
4775 | The command arguments you gave the utility to observe the bug. To | |
4776 | guarantee you will not omit something important, list them all. A copy | |
4777 | of the Makefile (or the output from make) is sufficient. | |
4778 | ||
4779 | If we were to try to guess the arguments, we would probably guess wrong | |
4780 | and then we might not encounter the bug. | |
4781 | ||
4782 | @item | |
4783 | A complete input file, or set of input files, that will reproduce the | |
4784 | bug. If the utility is reading an object file or files, then it is | |
ad22bfe8 | 4785 | generally most helpful to send the actual object files. |
252b5132 RH |
4786 | |
4787 | If the source files were produced exclusively using @sc{gnu} programs | |
c7c55b78 | 4788 | (e.g., @command{gcc}, @command{gas}, and/or the @sc{gnu} @command{ld}), then it |
252b5132 | 4789 | may be OK to send the source files rather than the object files. In |
c7c55b78 | 4790 | this case, be sure to say exactly what version of @command{gcc}, or |
252b5132 | 4791 | whatever, was used to produce the object files. Also say how |
c7c55b78 | 4792 | @command{gcc}, or whatever, was configured. |
252b5132 RH |
4793 | |
4794 | @item | |
4795 | A description of what behavior you observe that you believe is | |
4796 | incorrect. For example, ``It gets a fatal signal.'' | |
4797 | ||
4798 | Of course, if the bug is that the utility gets a fatal signal, then we | |
4799 | will certainly notice it. But if the bug is incorrect output, we might | |
4800 | not notice unless it is glaringly wrong. You might as well not give us | |
4801 | a chance to make a mistake. | |
4802 | ||
4803 | Even if the problem you experience is a fatal signal, you should still | |
f20a759a | 4804 | say so explicitly. Suppose something strange is going on, such as your |
b45619c0 | 4805 | copy of the utility is out of sync, or you have encountered a bug in |
252b5132 RH |
4806 | the C library on your system. (This has happened!) Your copy might |
4807 | crash and ours would not. If you told us to expect a crash, then when | |
4808 | ours fails to crash, we would know that the bug was not happening for | |
4809 | us. If you had not told us to expect a crash, then we would not be able | |
4810 | to draw any conclusion from our observations. | |
4811 | ||
4812 | @item | |
4813 | If you wish to suggest changes to the source, send us context diffs, as | |
c7c55b78 | 4814 | generated by @command{diff} with the @option{-u}, @option{-c}, or @option{-p} |
252b5132 | 4815 | option. Always send diffs from the old file to the new file. If you |
c7c55b78 | 4816 | wish to discuss something in the @command{ld} source, refer to it by |
f20a759a | 4817 | context, not by line number. |
252b5132 RH |
4818 | |
4819 | The line numbers in our development sources will not match those in your | |
4820 | sources. Your line numbers would convey no useful information to us. | |
4821 | @end itemize | |
4822 | ||
4823 | Here are some things that are not necessary: | |
4824 | ||
4825 | @itemize @bullet | |
4826 | @item | |
4827 | A description of the envelope of the bug. | |
4828 | ||
4829 | Often people who encounter a bug spend a lot of time investigating | |
4830 | which changes to the input file will make the bug go away and which | |
4831 | changes will not affect it. | |
4832 | ||
4833 | This is often time consuming and not very useful, because the way we | |
4834 | will find the bug is by running a single example under the debugger | |
4835 | with breakpoints, not by pure deduction from a series of examples. | |
4836 | We recommend that you save your time for something else. | |
4837 | ||
4838 | Of course, if you can find a simpler example to report @emph{instead} | |
4839 | of the original one, that is a convenience for us. Errors in the | |
4840 | output will be easier to spot, running under the debugger will take | |
4841 | less time, and so on. | |
4842 | ||
4843 | However, simplification is not vital; if you do not want to do this, | |
4844 | report the bug anyway and send us the entire test case you used. | |
4845 | ||
4846 | @item | |
4847 | A patch for the bug. | |
4848 | ||
4849 | A patch for the bug does help us if it is a good one. But do not omit | |
4850 | the necessary information, such as the test case, on the assumption that | |
4851 | a patch is all we need. We might see problems with your patch and decide | |
4852 | to fix the problem another way, or we might not understand it at all. | |
4853 | ||
4854 | Sometimes with programs as complicated as the binary utilities it is | |
4855 | very hard to construct an example that will make the program follow a | |
4856 | certain path through the code. If you do not send us the example, we | |
4857 | will not be able to construct one, so we will not be able to verify that | |
4858 | the bug is fixed. | |
4859 | ||
4860 | And if we cannot understand what bug you are trying to fix, or why your | |
4861 | patch should be an improvement, we will not install it. A test case will | |
4862 | help us to understand. | |
4863 | ||
4864 | @item | |
4865 | A guess about what the bug is or what it depends on. | |
4866 | ||
4867 | Such guesses are usually wrong. Even we cannot guess right about such | |
4868 | things without first using the debugger to find the facts. | |
4869 | @end itemize | |
4870 | ||
fff279a7 NC |
4871 | @node GNU Free Documentation License |
4872 | @appendix GNU Free Documentation License | |
b3364cb9 | 4873 | |
947ed062 | 4874 | @include fdl.texi |
cf055d54 | 4875 | |
fa0d8a3e NC |
4876 | @node Binutils Index |
4877 | @unnumbered Binutils Index | |
252b5132 RH |
4878 | |
4879 | @printindex cp | |
4880 | ||
252b5132 | 4881 | @bye |