| 1 | .\" Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 1998 Free Software Foundation |
| 2 | .\" See section COPYING for conditions for redistribution |
| 3 | .TH objdump 1 "5 November 1991" "cygnus support" "GNU Development Tools" |
| 4 | .de BP |
| 5 | .sp |
| 6 | .ti \-.2i |
| 7 | \(** |
| 8 | .. |
| 9 | |
| 10 | .SH NAME |
| 11 | objdump \- display information from object files. |
| 12 | |
| 13 | .SH SYNOPSIS |
| 14 | .hy 0 |
| 15 | .na |
| 16 | .TP |
| 17 | .B objdump |
| 18 | .RB "[\|" \-a | \-\-archive\-headers "\|]" |
| 19 | .RB "[\|" "\-b\ "\c |
| 20 | .I bfdname\c |
| 21 | .RB " | " "\-\-target="\c |
| 22 | .I bfdname\c |
| 23 | \&\|] |
| 24 | .RB "[\|" \-C | \-\-demangle "\|]" |
| 25 | .RB "[\|" \-\-debugging "\|]" |
| 26 | .RB "[\|" \-d | \-\-disassemble "\|]" |
| 27 | .RB "[\|" \-D | \-\-disassemble-all "\|]" |
| 28 | .RB "[\|" \-\-disassemble\-zeroes "\|]" |
| 29 | .RB "[\|" \-EB | \-EL | \-\-endian=\c |
| 30 | .I {big|little}\c |
| 31 | \&\|] |
| 32 | .RB "[\|" \-f | \-\-file\-headers "\|]" |
| 33 | .RB "[\|" \-h | \-\-section\-headers |
| 34 | .RB "| " \-\-headers "\|]" |
| 35 | .RB "[\|" \-i | \-\-info "\|]" |
| 36 | .RB "[\|" "\-j\ "\c |
| 37 | .I section\c |
| 38 | .RB " | " "\-\-section="\c |
| 39 | .I section\c |
| 40 | \&\|] |
| 41 | .RB "[\|" \-l | \-\-line\-numbers "\|]" |
| 42 | .RB "[\|" "\-m\ "\c |
| 43 | .I machine\c |
| 44 | .RB " | " "\-\-architecture="\c |
| 45 | .I machine\c |
| 46 | \&\|] |
| 47 | .RB "[\|" \-p | \-\-private\-headers "\|]" |
| 48 | .RB "[\|" \-\-prefix\-addresses "\|]" |
| 49 | .RB "[\|" \-r | \-\-reloc "\|]" |
| 50 | .RB "[\|" \-R | \-\-dynamic\-reloc "\|]" |
| 51 | .RB "[\|" \-s | \-\-full\-contents "\|]" |
| 52 | .RB "[\|" \-S | \-\-source "\|]" |
| 53 | .RB "[\|" \-\-[no\-]show\-raw\-insn "\|]" |
| 54 | .RB "[\|" \-\-stabs "\|]" |
| 55 | .RB "[\|" \-t | \-\-syms "\|]" |
| 56 | .RB "[\|" \-T | \-\-dynamic\-syms "\|]" |
| 57 | .RB "[\|" \-x | \-\-all\-headers "\|]" |
| 58 | .RB "[\|" "\-\-start\-address="\c |
| 59 | .I address\c |
| 60 | \&\|] |
| 61 | .RB "[\|" "\-\-stop\-address="\c |
| 62 | .I address\c |
| 63 | \&\|] |
| 64 | .RB "[\|" "\-\-adjust\-vma="\c |
| 65 | .I offset\c |
| 66 | \&\|] |
| 67 | .RB "[\|" \-\-version "\|]" |
| 68 | .RB "[\|" \-\-help "\|]" |
| 69 | .I objfile\c |
| 70 | \&.\|.\|. |
| 71 | .ad b |
| 72 | .hy 1 |
| 73 | .SH DESCRIPTION |
| 74 | \c |
| 75 | .B objdump\c |
| 76 | \& displays information about one or more object files. |
| 77 | The options control what particular information to display. This |
| 78 | information is mostly useful to programmers who are working on the |
| 79 | compilation tools, as opposed to programmers who just want their |
| 80 | program to compile and work. |
| 81 | .PP |
| 82 | .IR "objfile" .\|.\|. |
| 83 | are the object files to be examined. When you specify archives, |
| 84 | \c |
| 85 | .B objdump\c |
| 86 | \& shows information on each of the member object files. |
| 87 | |
| 88 | .SH OPTIONS |
| 89 | Where long and short forms of an option are shown together, they are |
| 90 | equivalent. At least one option besides |
| 91 | .B \-l |
| 92 | (\fB\-\-line\-numbers\fP) must be given. |
| 93 | |
| 94 | .TP |
| 95 | .B \-a |
| 96 | .TP |
| 97 | .B \-\-archive\-headers |
| 98 | If any files from \c |
| 99 | .I objfile\c |
| 100 | \& are archives, display the archive |
| 101 | header information (in a format similar to `\|\c |
| 102 | .B ls \-l\c |
| 103 | \|'). Besides the |
| 104 | information you could list with `\|\c |
| 105 | .B ar tv\c |
| 106 | \|', `\|\c |
| 107 | .B objdump \-a\c |
| 108 | \|' shows |
| 109 | the object file format of each archive member. |
| 110 | |
| 111 | .TP |
| 112 | .BI "\-\-adjust\-vma=" "offset" |
| 113 | When dumping information, first add |
| 114 | .I offset |
| 115 | to all the section addresses. This is useful if the section addresses |
| 116 | do not correspond to the symbol table, which can happen when putting |
| 117 | sections at particular addresses when using a format which can not |
| 118 | represent section addresses, such as a.out. |
| 119 | |
| 120 | .TP |
| 121 | .BI "\-b " "bfdname"\c |
| 122 | .TP |
| 123 | .BI "\-\-target=" "bfdname" |
| 124 | Specify the object-code format for the object files to be |
| 125 | \c |
| 126 | .I bfdname\c |
| 127 | \&. This may not be necessary; \c |
| 128 | .I objdump\c |
| 129 | \& can |
| 130 | automatically recognize many formats. For example, |
| 131 | .sp |
| 132 | .br |
| 133 | objdump\ \-b\ oasys\ \-m\ vax\ \-h\ fu.o |
| 134 | .br |
| 135 | .sp |
| 136 | display summary information from the section headers (`\|\c |
| 137 | .B \-h\c |
| 138 | \|') of |
| 139 | `\|\c |
| 140 | .B fu.o\c |
| 141 | \|', which is explicitly identified (`\|\c |
| 142 | .B \-m\c |
| 143 | \|') as a Vax object |
| 144 | file in the format produced by Oasys compilers. You can list the |
| 145 | formats available with the `\|\c |
| 146 | .B \-i\c |
| 147 | \|' option. |
| 148 | |
| 149 | .TP |
| 150 | .B \-C |
| 151 | .TP |
| 152 | .B \-\-demangle |
| 153 | Decode (\fIdemangle\fP) low-level symbol names into user-level names. |
| 154 | Besides removing any initial underscore prepended by the system, this |
| 155 | makes C++ function names readable. |
| 156 | |
| 157 | .TP |
| 158 | .B \-\-debugging |
| 159 | Display debugging information. This attempts to parse debugging |
| 160 | information stored in the file and print it out using a C like syntax. |
| 161 | Only certain types of debugging information have been implemented. |
| 162 | |
| 163 | .TP |
| 164 | .B \-d |
| 165 | .TP |
| 166 | .B \-\-disassemble |
| 167 | Display the assembler mnemonics for the machine |
| 168 | instructions from \c |
| 169 | .I objfile\c |
| 170 | \&. |
| 171 | This option only disassembles those sections which are |
| 172 | expected to contain instructions. |
| 173 | |
| 174 | .TP |
| 175 | .B \-D |
| 176 | .TP |
| 177 | .B \-\-disassemble-all |
| 178 | Like \fB\-d\fP, but disassemble the contents of all sections, not just |
| 179 | those expected to contain instructions. |
| 180 | |
| 181 | .TP |
| 182 | .B \-\-prefix\-addresses |
| 183 | When disassembling, print the complete address on each line. This is |
| 184 | the older disassembly format. |
| 185 | |
| 186 | .TP |
| 187 | .B \-\-disassemble\-zeroes |
| 188 | Normally the disassembly output will skip blocks of zeroes. This |
| 189 | option directs the disassembler to disassemble those blocks, just like |
| 190 | any other data. |
| 191 | |
| 192 | .TP |
| 193 | .B \-EB |
| 194 | .TP |
| 195 | .B \-EL |
| 196 | .TP |
| 197 | .BI "\-\-endian=" "{big|little}" |
| 198 | Specify the endianness of the object files. This only affects |
| 199 | disassembly. This can be useful when disassembling a file format which |
| 200 | does not describe endianness information, such as S-records. |
| 201 | |
| 202 | .TP |
| 203 | .B \-f |
| 204 | .TP |
| 205 | .B \-\-file\-headers |
| 206 | Display summary information from the overall header of |
| 207 | each file in \c |
| 208 | .I objfile\c |
| 209 | \&. |
| 210 | |
| 211 | .TP |
| 212 | .B \-h |
| 213 | .TP |
| 214 | .B \-\-section\-headers |
| 215 | .TP |
| 216 | .B \-\-headers |
| 217 | Display summary information from the section headers of the |
| 218 | object file. |
| 219 | |
| 220 | .TP |
| 221 | .B \-\-help |
| 222 | Print a summary of the options to |
| 223 | .B objdump |
| 224 | and exit. |
| 225 | |
| 226 | .TP |
| 227 | .B \-i |
| 228 | .TP |
| 229 | .B \-\-info |
| 230 | Display a list showing all architectures and object formats available |
| 231 | for specification with \c |
| 232 | .B \-b\c |
| 233 | \& or \c |
| 234 | .B \-m\c |
| 235 | \&. |
| 236 | |
| 237 | .TP |
| 238 | .BI "\-j " "name"\c |
| 239 | .TP |
| 240 | .BI "\-\-section=" "name" |
| 241 | Display information only for section \c |
| 242 | .I name\c |
| 243 | \&. |
| 244 | |
| 245 | .TP |
| 246 | .B \-l |
| 247 | .TP |
| 248 | .B \-\-line\-numbers |
| 249 | Label the display (using debugging information) with the filename |
| 250 | and source line numbers corresponding to the object code shown. |
| 251 | Only useful with \fB\-d\fP, \fB\-D\fP, or \fB\-r\fP. |
| 252 | |
| 253 | .TP |
| 254 | .BI "\-m " "machine"\c |
| 255 | .TP |
| 256 | .BI "\-\-architecture=" "machine" |
| 257 | Specify the architecture to use when disassembling object files. This |
| 258 | can be useful when disassembling object files which do not describe |
| 259 | architecture information, such as S-records. You can list the available |
| 260 | architectures with the \fB\-i\fP option. |
| 261 | |
| 262 | .TP |
| 263 | .B \-p |
| 264 | .TP |
| 265 | .B \-\-private\-headers |
| 266 | Print information that is specific to the object file format. The |
| 267 | exact information printed depends upon the object file format. For |
| 268 | some object file formats, no additional information is printed. |
| 269 | |
| 270 | .TP |
| 271 | .B \-r |
| 272 | .TP |
| 273 | .B \-\-reloc |
| 274 | Print the relocation entries of the file. If used with \fB\-d\fP or |
| 275 | \fB\-d\fP, the relocations are printed interspersed with the |
| 276 | disassembly. |
| 277 | |
| 278 | .TP |
| 279 | .B \-R |
| 280 | .TP |
| 281 | .B \-\-dynamic\-reloc |
| 282 | Print the dynamic relocation entries of the file. This is only |
| 283 | meaningful for dynamic objects, such as certain types of shared |
| 284 | libraries. |
| 285 | |
| 286 | .TP |
| 287 | .B \-s |
| 288 | .TP |
| 289 | .B \-\-full\-contents |
| 290 | Display the full contents of any sections requested. |
| 291 | |
| 292 | .TP |
| 293 | .B \-S |
| 294 | .TP |
| 295 | .B \-\-source |
| 296 | Display source code intermixed with disassembly, if possible. Implies |
| 297 | \fB-d\fP. |
| 298 | |
| 299 | .TP |
| 300 | .B \-\-show\-raw\-insn |
| 301 | When disassembling instructions, print the instruction in hex as well as |
| 302 | in symbolic form. This is the default except when |
| 303 | .B \-\-prefix\-addresses |
| 304 | is used. |
| 305 | |
| 306 | .TP |
| 307 | .B \-\-no\-show\-raw\-insn |
| 308 | When disassembling instructions, do not print the instruction bytes. |
| 309 | This is the default when |
| 310 | .B \-\-prefix\-addresses |
| 311 | is used. |
| 312 | |
| 313 | .TP |
| 314 | .B \-\-stabs |
| 315 | Display the contents of the .stab, .stab.index, and .stab.excl |
| 316 | sections from an ELF file. This is only useful on systems (such as |
| 317 | Solaris 2.0) in which .stab debugging symbol-table entries are carried |
| 318 | in an ELF section. In most other file formats, debugging symbol-table |
| 319 | entries are interleaved with linkage symbols, and are visible in the |
| 320 | .B \-\-syms |
| 321 | output. |
| 322 | |
| 323 | .TP |
| 324 | .BI "\-\-start\-address=" "address" |
| 325 | Start displaying data at the specified address. This affects the output |
| 326 | of the |
| 327 | .B \-d\c |
| 328 | , |
| 329 | .B \-r |
| 330 | and |
| 331 | .B \-s |
| 332 | options. |
| 333 | |
| 334 | .TP |
| 335 | .BI "\-\-stop\-address=" "address" |
| 336 | Stop displaying data at the specified address. This affects the output |
| 337 | of the |
| 338 | .B \-d\c |
| 339 | , |
| 340 | .B \-r |
| 341 | and |
| 342 | .B \-s |
| 343 | options. |
| 344 | |
| 345 | .TP |
| 346 | .B \-t |
| 347 | .TP |
| 348 | .B \-\-syms |
| 349 | Symbol Table. Print the symbol table entries of the file. |
| 350 | This is similar to the information provided by the `\|\c |
| 351 | .B nm\c |
| 352 | \|' program. |
| 353 | |
| 354 | .TP |
| 355 | .B \-T |
| 356 | .TP |
| 357 | .B \-\-dynamic\-syms |
| 358 | Dynamic Symbol Table. Print the dynamic symbol table entries of the |
| 359 | file. This is only meaningful for dynamic objects, such as certain |
| 360 | types of shared libraries. This is similar to the information |
| 361 | provided by the `\|\c |
| 362 | .B nm\c |
| 363 | \|' program when given the |
| 364 | .B \-D (\-\-dynamic) |
| 365 | option. |
| 366 | |
| 367 | .TP |
| 368 | .B \-\-version |
| 369 | Print the version number of |
| 370 | .B objdump |
| 371 | and exit. |
| 372 | |
| 373 | .TP |
| 374 | .B \-x |
| 375 | .TP |
| 376 | .B \-\-all\-headers |
| 377 | Display all available header information, including the symbol table and |
| 378 | relocation entries. Using `\|\c |
| 379 | .B \-x\c |
| 380 | \|' is equivalent to specifying all of |
| 381 | `\|\c |
| 382 | .B \-a \-f \-h \-r \-t\c |
| 383 | \|'. |
| 384 | |
| 385 | .SH "SEE ALSO" |
| 386 | .RB "`\|" binutils "\|'" |
| 387 | entry in |
| 388 | .B |
| 389 | info\c |
| 390 | \&; |
| 391 | .I |
| 392 | The GNU Binary Utilities\c |
| 393 | \&, Roland H. Pesch (October 1991); |
| 394 | .BR nm "(" 1 ")." |
| 395 | |
| 396 | .SH COPYING |
| 397 | Copyright (c) 1991, 92, 93, 94, 95, 1996 Free Software Foundation, Inc. |
| 398 | .PP |
| 399 | Permission is granted to make and distribute verbatim copies of |
| 400 | this manual provided the copyright notice and this permission notice |
| 401 | are preserved on all copies. |
| 402 | .PP |
| 403 | Permission is granted to copy and distribute modified versions of this |
| 404 | manual under the conditions for verbatim copying, provided that the |
| 405 | entire resulting derived work is distributed under the terms of a |
| 406 | permission notice identical to this one. |
| 407 | .PP |
| 408 | Permission is granted to copy and distribute translations of this |
| 409 | manual into another language, under the above conditions for modified |
| 410 | versions, except that this permission notice may be included in |
| 411 | translations approved by the Free Software Foundation instead of in |
| 412 | the original English. |