binutils/objdump.1

   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.