1OBJDUMP(1) GNU Development Tools OBJDUMP(1)
2
6 objdump - display information from object files
7
9 objdump [-a|--archive-headers]
10 [-b bfdname|--target=bfdname]
11 [-C|--demangle[=style] ]
12 [-d|--disassemble[=symbol]]
13 [-D|--disassemble-all]
14 [-z|--disassemble-zeroes]
15 [-EB|-EL|--endian={big | little }]
16 [-f|--file-headers]
17 [-F|--file-offsets]
18 [--file-start-context]
19 [-g|--debugging]
20 [-e|--debugging-tags]
21 [-h|--section-headers|--headers]
22 [-i|--info]
23 [-j section|--section=section]
24 [-l|--line-numbers]
25 [-S|--source]
26 [--source-comment[=text]]
27 [-m machine|--architecture=machine]
28 [-M options|--disassembler-options=options]
29 [-p|--private-headers]
30 [-P options|--private=options]
31 [-r|--reloc]
32 [-R|--dynamic-reloc]
33 [-s|--full-contents]
34 [-W[lLiaprmfFsoORtUuTgAckK]|
35 --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]]
36 [--ctf=section]
37 [-G|--stabs]
38 [-t|--syms]
39 [-T|--dynamic-syms]
40 [-x|--all-headers]
41 [-w|--wide]
42 [--start-address=address]
43 [--stop-address=address]
44 [--no-addresses]
45 [--prefix-addresses]
46 [--[no-]show-raw-insn]
47 [--adjust-vma=offset]
48 [--dwarf-depth=n]
49 [--dwarf-start=n]
50 [--ctf-parent=section]
51 [--no-recurse-limit|--recurse-limit]
52 [--special-syms]
53 [--prefix=prefix]
54 [--prefix-strip=level]
55 [--insn-width=width]
56 [--visualize-jumps[=color|=extended-color|=off]
57 [-V|--version]
58 [-H|--help]
59 objfile...
60
62 objdump displays information about one or more object files. The
63 options control what particular information to display. This
64 information is mostly useful to programmers who are working on the
65 compilation tools, as opposed to programmers who just want their
66 program to compile and work.
67 objfile... are the object files to be examined. When you specify
69 archives, objdump shows information on each of the member object files.
70
72 The long and short forms of options, shown here as alternatives, are
73 equivalent. At least one option from the list
74 -a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-P,-r,-R,-s,-S,-t,-T,-V,-x must be given.
75 -a
77 --archive-header
78 If any of the objfile files are archives, display the archive
79 header information (in a format similar to ls -l). Besides the
80 information you could list with ar tv, objdump -a shows the object
81 file format of each archive member.
82 --adjust-vma=offset
84 When dumping information, first add offset to all the section
85 addresses. This is useful if the section addresses do not
86 correspond to the symbol table, which can happen when putting
87 sections at particular addresses when using a format which can not
88 represent section addresses, such as a.out.
89 -b bfdname
91 --target=bfdname
92 Specify that the object-code format for the object files is
93 bfdname. This option may not be necessary; objdump can
94 automatically recognize many formats.
95 For example,
97 objdump -b oasys -m vax -h fu.o
99 displays summary information from the section headers (-h) of fu.o,
101 which is explicitly identified (-m) as a VAX object file in the
102 format produced by Oasys compilers. You can list the formats
103 available with the -i option.
104 -C
106 --demangle[=style]
107 Decode (demangle) low-level symbol names into user-level names.
108 Besides removing any initial underscore prepended by the system,
109 this makes C++ function names readable. Different compilers have
110 different mangling styles. The optional demangling style argument
111 can be used to choose an appropriate demangling style for your
112 compiler.
113 --recurse-limit
115 --no-recurse-limit
116 --recursion-limit
117 --no-recursion-limit
118 Enables or disables a limit on the amount of recursion performed
119 whilst demangling strings. Since the name mangling formats allow
120 for an inifinite level of recursion it is possible to create
121 strings whose decoding will exhaust the amount of stack space
122 available on the host machine, triggering a memory fault. The
123 limit tries to prevent this from happening by restricting recursion
124 to 2048 levels of nesting.
125 The default is for this limit to be enabled, but disabling it may
127 be necessary in order to demangle truly complicated names. Note
128 however that if the recursion limit is disabled then stack
129 exhaustion is possible and any bug reports about such an event will
130 be rejected.
131 -g
133 --debugging
134 Display debugging information. This attempts to parse STABS
135 debugging format information stored in the file and print it out
136 using a C like syntax. If no STABS debugging was found this option
137 falls back on the -W option to print any DWARF information in the
138 file.
139 -e
141 --debugging-tags
142 Like -g, but the information is generated in a format compatible
143 with ctags tool.
144 -d
146 --disassemble
147 --disassemble=symbol
148 Display the assembler mnemonics for the machine instructions from
149 the input file. This option only disassembles those sections which
150 are expected to contain instructions. If the optional symbol
151 argument is given, then display the assembler mnemonics starting at
152 symbol. If symbol is a function name then disassembly will stop at
153 the end of the function, otherwise it will stop when the next
154 symbol is encountered. If there are no matches for symbol then
155 nothing will be displayed.
156 Note if the --dwarf=follow-links option has also been enabled then
158 any symbol tables in linked debug info files will be read in and
159 used when disassembling.
160 -D
162 --disassemble-all
163 Like -d, but disassemble the contents of all sections, not just
164 those expected to contain instructions.
165 This option also has a subtle effect on the disassembly of
167 instructions in code sections. When option -d is in effect objdump
168 will assume that any symbols present in a code section occur on the
169 boundary between instructions and it will refuse to disassemble
170 across such a boundary. When option -D is in effect however this
171 assumption is supressed. This means that it is possible for the
172 output of -d and -D to differ if, for example, data is stored in
173 code sections.
174 If the target is an ARM architecture this switch also has the
176 effect of forcing the disassembler to decode pieces of data found
177 in code sections as if they were instructions.
178 Note if the --dwarf=follow-links option has also been enabled then
180 any symbol tables in linked debug info files will be read in and
181 used when disassembling.
182 --no-addresses
184 When disassembling, don't print addresses on each line or for
185 symbols and relocation offsets. In combination with
186 --no-show-raw-insn this may be useful for comparing compiler
187 output.
188 --prefix-addresses
190 When disassembling, print the complete address on each line. This
191 is the older disassembly format.
192 -EB
194 -EL
195 --endian={big|little}
196 Specify the endianness of the object files. This only affects
197 disassembly. This can be useful when disassembling a file format
198 which does not describe endianness information, such as S-records.
199 -f
201 --file-headers
202 Display summary information from the overall header of each of the
203 objfile files.
204 -F
206 --file-offsets
207 When disassembling sections, whenever a symbol is displayed, also
208 display the file offset of the region of data that is about to be
209 dumped. If zeroes are being skipped, then when disassembly
210 resumes, tell the user how many zeroes were skipped and the file
211 offset of the location from where the disassembly resumes. When
212 dumping sections, display the file offset of the location from
213 where the dump starts.
214 --file-start-context
216 Specify that when displaying interlisted source code/disassembly
217 (assumes -S) from a file that has not yet been displayed, extend
218 the context to the start of the file.
219 -h
221 --section-headers
222 --headers
223 Display summary information from the section headers of the object
224 file.
225 File segments may be relocated to nonstandard addresses, for
227 example by using the -Ttext, -Tdata, or -Tbss options to ld.
228 However, some object file formats, such as a.out, do not store the
229 starting address of the file segments. In those situations,
230 although ld relocates the sections correctly, using objdump -h to
231 list the file section headers cannot show the correct addresses.
232 Instead, it shows the usual addresses, which are implicit for the
233 target.
234 Note, in some cases it is possible for a section to have both the
236 READONLY and the NOREAD attributes set. In such cases the NOREAD
237 attribute takes precedence, but objdump will report both since the
238 exact setting of the flag bits might be important.
239 -H
241 --help
242 Print a summary of the options to objdump and exit.
243 -i
245 --info
246 Display a list showing all architectures and object formats
247 available for specification with -b or -m.
248 -j name
250 --section=name
251 Display information only for section name.
252 -l
254 --line-numbers
255 Label the display (using debugging information) with the filename
256 and source line numbers corresponding to the object code or relocs
257 shown. Only useful with -d, -D, or -r.
258 -m machine
260 --architecture=machine
261 Specify the architecture to use when disassembling object files.
262 This can be useful when disassembling object files which do not
263 describe architecture information, such as S-records. You can list
264 the available architectures with the -i option.
265 If the target is an ARM architecture then this switch has an
267 additional effect. It restricts the disassembly to only those
268 instructions supported by the architecture specified by machine.
269 If it is necessary to use this switch because the input file does
270 not contain any architecture information, but it is also desired to
271 disassemble all the instructions use -marm.
272 -M options
274 --disassembler-options=options
275 Pass target specific information to the disassembler. Only
276 supported on some targets. If it is necessary to specify more than
277 one disassembler option then multiple -M options can be used or can
278 be placed together into a comma separated list.
279 For ARC, dsp controls the printing of DSP instructions, spfp
281 selects the printing of FPX single precision FP instructions, dpfp
282 selects the printing of FPX double precision FP instructions,
283 quarkse_em selects the printing of special QuarkSE-EM instructions,
284 fpuda selects the printing of double precision assist instructions,
285 fpus selects the printing of FPU single precision FP instructions,
286 while fpud selects the printing of FPU double precision FP
287 instructions. Additionally, one can choose to have all the
288 immediates printed in hexadecimal using hex. By default, the short
289 immediates are printed using the decimal representation, while the
290 long immediate values are printed as hexadecimal.
291 cpu=... allows to enforce a particular ISA when disassembling
293 instructions, overriding the -m value or whatever is in the ELF
294 file. This might be useful to select ARC EM or HS ISA, because
295 architecture is same for those and disassembler relies on private
296 ELF header data to decide if code is for EM or HS. This option
297 might be specified multiple times - only the latest value will be
298 used. Valid values are same as for the assembler -mcpu=... option.
299 If the target is an ARM architecture then this switch can be used
301 to select which register name set is used during disassembler.
302 Specifying -M reg-names-std (the default) will select the register
303 names as used in ARM's instruction set documentation, but with
304 register 13 called 'sp', register 14 called 'lr' and register 15
305 called 'pc'. Specifying -M reg-names-apcs will select the name set
306 used by the ARM Procedure Call Standard, whilst specifying -M reg-
307 names-raw will just use r followed by the register number.
308 There are also two variants on the APCS register naming scheme
310 enabled by -M reg-names-atpcs and -M reg-names-special-atpcs which
311 use the ARM/Thumb Procedure Call Standard naming conventions.
312 (Either with the normal register names or the special register
313 names).
314 This option can also be used for ARM architectures to force the
316 disassembler to interpret all instructions as Thumb instructions by
317 using the switch --disassembler-options=force-thumb. This can be
318 useful when attempting to disassemble thumb code produced by other
319 compilers.
320 For AArch64 targets this switch can be used to set whether
322 instructions are disassembled as the most general instruction using
323 the -M no-aliases option or whether instruction notes should be
324 generated as comments in the disasssembly using -M notes.
325 For the x86, some of the options duplicate functions of the -m
327 switch, but allow finer grained control.
328 "x86-64"
330 "i386"
331 "i8086"
332 Select disassembly for the given architecture.
333 "intel"
335 "att"
336 Select between intel syntax mode and AT&T syntax mode.
337 "amd64"
339 "intel64"
340 Select between AMD64 ISA and Intel64 ISA.
341 "intel-mnemonic"
343 "att-mnemonic"
344 Select between intel mnemonic mode and AT&T mnemonic mode.
345 Note: "intel-mnemonic" implies "intel" and "att-mnemonic"
346 implies "att".
347 "addr64"
349 "addr32"
350 "addr16"
351 "data32"
352 "data16"
353 Specify the default address size and operand size. These five
354 options will be overridden if "x86-64", "i386" or "i8086"
355 appear later in the option string.
356 "suffix"
358 When in AT&T mode and also for a limited set of instructions
359 when in Intel mode, instructs the disassembler to print a
360 mnemonic suffix even when the suffix could be inferred by the
361 operands or, for certain instructions, the execution mode's
362 defaults.
363 For PowerPC, the -M argument raw selects disasssembly of hardware
365 insns rather than aliases. For example, you will see "rlwinm"
366 rather than "clrlwi", and "addi" rather than "li". All of the -m
367 arguments for gas that select a CPU are supported. These are: 403,
368 405, 440, 464, 476, 601, 603, 604, 620, 7400, 7410, 7450, 7455,
369 750cl, 821, 850, 860, a2, booke, booke32, cell, com, e200z4, e300,
370 e500, e500mc, e500mc64, e500x2, e5500, e6500, efs, power4, power5,
371 power6, power7, power8, power9, power10, ppc, ppc32, ppc64,
372 ppc64bridge, ppcps, pwr, pwr2, pwr4, pwr5, pwr5x, pwr6, pwr7, pwr8,
373 pwr9, pwr10, pwrx, titan, and vle. 32 and 64 modify the default or
374 a prior CPU selection, disabling and enabling 64-bit insns
375 respectively. In addition, altivec, any, htm, vsx, and spe add
376 capabilities to a previous or later CPU selection. any will
377 disassemble any opcode known to binutils, but in cases where an
378 opcode has two different meanings or different arguments, you may
379 not see the disassembly you expect. If you disassemble without
380 giving a CPU selection, a default will be chosen from information
381 gleaned by BFD from the object files headers, but the result again
382 may not be as you expect.
383 For MIPS, this option controls the printing of instruction mnemonic
385 names and register names in disassembled instructions. Multiple
386 selections from the following may be specified as a comma separated
387 string, and invalid options are ignored:
388 "no-aliases"
390 Print the 'raw' instruction mnemonic instead of some pseudo
391 instruction mnemonic. I.e., print 'daddu' or 'or' instead of
392 'move', 'sll' instead of 'nop', etc.
393 "msa"
395 Disassemble MSA instructions.
396 "virt"
398 Disassemble the virtualization ASE instructions.
399 "xpa"
401 Disassemble the eXtended Physical Address (XPA) ASE
402 instructions.
403 "gpr-names=ABI"
405 Print GPR (general-purpose register) names as appropriate for
406 the specified ABI. By default, GPR names are selected
407 according to the ABI of the binary being disassembled.
408 "fpr-names=ABI"
410 Print FPR (floating-point register) names as appropriate for
411 the specified ABI. By default, FPR numbers are printed rather
412 than names.
413 "cp0-names=ARCH"
415 Print CP0 (system control coprocessor; coprocessor 0) register
416 names as appropriate for the CPU or architecture specified by
417 ARCH. By default, CP0 register names are selected according to
418 the architecture and CPU of the binary being disassembled.
419 "hwr-names=ARCH"
421 Print HWR (hardware register, used by the "rdhwr" instruction)
422 names as appropriate for the CPU or architecture specified by
423 ARCH. By default, HWR names are selected according to the
424 architecture and CPU of the binary being disassembled.
425 "reg-names=ABI"
427 Print GPR and FPR names as appropriate for the selected ABI.
428 "reg-names=ARCH"
430 Print CPU-specific register names (CP0 register and HWR names)
431 as appropriate for the selected CPU or architecture.
432 For any of the options listed above, ABI or ARCH may be specified
434 as numeric to have numbers printed rather than names, for the
435 selected types of registers. You can list the available values of
436 ABI and ARCH using the --help option.
437 For VAX, you can specify function entry addresses with -M
439 entry:0xf00ba. You can use this multiple times to properly
440 disassemble VAX binary files that don't contain symbol tables (like
441 ROM dumps). In these cases, the function entry mask would
442 otherwise be decoded as VAX instructions, which would probably lead
443 the rest of the function being wrongly disassembled.
444 -p
446 --private-headers
447 Print information that is specific to the object file format. The
448 exact information printed depends upon the object file format. For
449 some object file formats, no additional information is printed.
450 -P options
452 --private=options
453 Print information that is specific to the object file format. The
454 argument options is a comma separated list that depends on the
455 format (the lists of options is displayed with the help).
456 For XCOFF, the available options are:
458 "header"
460 "aout"
461 "sections"
462 "syms"
463 "relocs"
464 "lineno,"
465 "loader"
466 "except"
467 "typchk"
468 "traceback"
469 "toc"
470 "ldinfo"
471 Not all object formats support this option. In particular the ELF
473 format does not use it.
474 -r
476 --reloc
477 Print the relocation entries of the file. If used with -d or -D,
478 the relocations are printed interspersed with the disassembly.
479 -R
481 --dynamic-reloc
482 Print the dynamic relocation entries of the file. This is only
483 meaningful for dynamic objects, such as certain types of shared
484 libraries. As for -r, if used with -d or -D, the relocations are
485 printed interspersed with the disassembly.
486 -s
488 --full-contents
489 Display the full contents of any sections requested. By default
490 all non-empty sections are displayed.
491 -S
493 --source
494 Display source code intermixed with disassembly, if possible.
495 Implies -d.
496 --source-comment[=txt]
498 Like the -S option, but all source code lines are displayed with a
499 prefix of txt. Typically txt will be a comment string which can be
500 used to distinguish the assembler code from the source code. If
501 txt is not provided then a default string of "# " (hash followed by
502 a space), will be used.
503 --prefix=prefix
505 Specify prefix to add to the absolute paths when used with -S.
506 --prefix-strip=level
508 Indicate how many initial directory names to strip off the
509 hardwired absolute paths. It has no effect without --prefix=prefix.
510 --show-raw-insn
512 When disassembling instructions, print the instruction in hex as
513 well as in symbolic form. This is the default except when
514 --prefix-addresses is used.
515 --no-show-raw-insn
517 When disassembling instructions, do not print the instruction
518 bytes. This is the default when --prefix-addresses is used.
519 --insn-width=width
521 Display width bytes on a single line when disassembling
522 instructions.
523 --visualize-jumps[=color|=extended-color|=off]
525 Visualize jumps that stay inside a function by drawing ASCII art
526 between the start and target addresses. The optional =color
527 argument adds color to the output using simple terminal colors.
528 Alternatively the =extended-color argument will add color using
529 8bit colors, but these might not work on all terminals.
530 If it is necessary to disable the visualize-jumps option after it
532 has previously been enabled then use visualize-jumps=off.
533 -W[lLiaprmfFsoORtUuTgAckK]
535 --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=str-offsets,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
536 Displays the contents of the DWARF debug sections in the file, if
537 any are present. Compressed debug sections are automatically
538 decompressed (temporarily) before they are displayed. If one or
539 more of the optional letters or words follows the switch then only
540 those type(s) of data will be dumped. The letters and words refer
541 to the following information:
542 "a"
544 "=abbrev"
545 Displays the contents of the .debug_abbrev section.
546 "A"
548 "=addr"
549 Displays the contents of the .debug_addr section.
550 "c"
552 "=cu_index"
553 Displays the contents of the .debug_cu_index and/or
554 .debug_tu_index sections.
555 "f"
557 "=frames"
558 Display the raw contents of a .debug_frame section.
559 "F"
561 "=frame-interp"
562 Display the interpreted contents of a .debug_frame section.
563 "g"
565 "=gdb_index"
566 Displays the contents of the .gdb_index and/or .debug_names
567 sections.
568 "i"
570 "=info"
571 Displays the contents of the .debug_info section. Note: the
572 output from this option can also be restricted by the use of
573 the --dwarf-depth and --dwarf-start options.
574 "k"
576 "=links"
577 Displays the contents of the .gnu_debuglink and/or
578 .gnu_debugaltlink sections. Also displays any links to
579 separate dwarf object files (dwo), if they are specified by the
580 DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
581 .debug_info section.
582 "K"
584 "=follow-links"
585 Display the contents of any selected debug sections that are
586 found in linked, separate debug info file(s). This can result
587 in multiple versions of the same debug section being displayed
588 if it exists in more than one file.
589 In addition, when displaying DWARF attributes, if a form is
591 found that references the separate debug info file, then the
592 referenced contents will also be displayed.
593 "l"
595 "=rawline"
596 Displays the contents of the .debug_line section in a raw
597 format.
598 "L"
600 "=decodedline"
601 Displays the interpreted contents of the .debug_line section.
602 "m"
604 "=macro"
605 Displays the contents of the .debug_macro and/or .debug_macinfo
606 sections.
607 "o"
609 "=loc"
610 Displays the contents of the .debug_loc and/or .debug_loclists
611 sections.
612 "O"
614 "=str-offsets"
615 Displays the contents of the .debug_str_offsets section.
616 "p"
618 "=pubnames"
619 Displays the contents of the .debug_pubnames and/or
620 .debug_gnu_pubnames sections.
621 "r"
623 "=aranges"
624 Displays the contents of the .debug_aranges section.
625 "R"
627 "=Ranges"
628 Displays the contents of the .debug_ranges and/or
629 .debug_rnglists sections.
630 "s"
632 "=str"
633 Displays the contents of the .debug_str, .debug_line_str and/or
634 .debug_str_offsets sections.
635 "t"
637 "=pubtype"
638 Displays the contents of the .debug_pubtypes and/or
639 .debug_gnu_pubtypes sections.
640 "T"
642 "=trace_aranges"
643 Displays the contents of the .trace_aranges section.
644 "u"
646 "=trace_abbrev"
647 Displays the contents of the .trace_abbrev section.
648 "U"
650 "=trace_info"
651 Displays the contents of the .trace_info section.
652 Note: displaying the contents of .debug_static_funcs,
654 .debug_static_vars and debug_weaknames sections is not currently
655 supported.
656 --dwarf-depth=n
658 Limit the dump of the ".debug_info" section to n children. This is
659 only useful with --debug-dump=info. The default is to print all
660 DIEs; the special value 0 for n will also have this effect.
661 With a non-zero value for n, DIEs at or deeper than n levels will
663 not be printed. The range for n is zero-based.
664 --dwarf-start=n
666 Print only DIEs beginning with the DIE numbered n. This is only
667 useful with --debug-dump=info.
668 If specified, this option will suppress printing of any header
670 information and all DIEs before the DIE numbered n. Only siblings
671 and children of the specified DIE will be printed.
672 This can be used in conjunction with --dwarf-depth.
674 --dwarf-check
676 Enable additional checks for consistency of Dwarf information.
677 --ctf=section
679 Display the contents of the specified CTF section. CTF sections
680 themselves contain many subsections, all of which are displayed in
681 order.
682 --ctf-parent=section
684 Specify the name of another section from which the CTF dictionary
685 can inherit types. (If none is specified, we assume the CTF
686 dictionary inherits types from the default-named member of the
687 archive contained within this section.)
688 -G
690 --stabs
691 Display the full contents of any sections requested. Display the
692 contents of the .stab and .stab.index and .stab.excl sections from
693 an ELF file. This is only useful on systems (such as Solaris 2.0)
694 in which ".stab" debugging symbol-table entries are carried in an
695 ELF section. In most other file formats, debugging symbol-table
696 entries are interleaved with linkage symbols, and are visible in
697 the --syms output.
698 --start-address=address
700 Start displaying data at the specified address. This affects the
701 output of the -d, -r and -s options.
702 --stop-address=address
704 Stop displaying data at the specified address. This affects the
705 output of the -d, -r and -s options.
706 -t
708 --syms
709 Print the symbol table entries of the file. This is similar to the
710 information provided by the nm program, although the display format
711 is different. The format of the output depends upon the format of
712 the file being dumped, but there are two main types. One looks
713 like this:
714 [ 4](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .bss
716 [ 6](sec 1)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 fred
717 where the number inside the square brackets is the number of the
719 entry in the symbol table, the sec number is the section number,
720 the fl value are the symbol's flag bits, the ty number is the
721 symbol's type, the scl number is the symbol's storage class and the
722 nx value is the number of auxilary entries associated with the
723 symbol. The last two fields are the symbol's value and its name.
724 The other common output format, usually seen with ELF based files,
726 looks like this:
727 00000000 l d .bss 00000000 .bss
729 00000000 g .text 00000000 fred
730 Here the first number is the symbol's value (sometimes refered to
732 as its address). The next field is actually a set of characters
733 and spaces indicating the flag bits that are set on the symbol.
734 These characters are described below. Next is the section with
735 which the symbol is associated or *ABS* if the section is absolute
736 (ie not connected with any section), or *UND* if the section is
737 referenced in the file being dumped, but not defined there.
738 After the section name comes another field, a number, which for
740 common symbols is the alignment and for other symbol is the size.
741 Finally the symbol's name is displayed.
742 The flag characters are divided into 7 groups as follows:
744 "l"
746 "g"
747 "u"
748 "!" The symbol is a local (l), global (g), unique global (u),
749 neither global nor local (a space) or both global and local
750 (!). A symbol can be neither local or global for a variety of
751 reasons, e.g., because it is used for debugging, but it is
752 probably an indication of a bug if it is ever both local and
753 global. Unique global symbols are a GNU extension to the
754 standard set of ELF symbol bindings. For such a symbol the
755 dynamic linker will make sure that in the entire process there
756 is just one symbol with this name and type in use.
757 "w" The symbol is weak (w) or strong (a space).
759 "C" The symbol denotes a constructor (C) or an ordinary symbol (a
761 space).
762 "W" The symbol is a warning (W) or a normal symbol (a space). A
764 warning symbol's name is a message to be displayed if the
765 symbol following the warning symbol is ever referenced.
766 "I"
768 "i" The symbol is an indirect reference to another symbol (I), a
769 function to be evaluated during reloc processing (i) or a
770 normal symbol (a space).
771 "d"
773 "D" The symbol is a debugging symbol (d) or a dynamic symbol (D) or
774 a normal symbol (a space).
775 "F"
777 "f"
778 "O" The symbol is the name of a function (F) or a file (f) or an
779 object (O) or just a normal symbol (a space).
780 -T
782 --dynamic-syms
783 Print the dynamic symbol table entries of the file. This is only
784 meaningful for dynamic objects, such as certain types of shared
785 libraries. This is similar to the information provided by the nm
786 program when given the -D (--dynamic) option.
787 The output format is similar to that produced by the --syms option,
789 except that an extra field is inserted before the symbol's name,
790 giving the version information associated with the symbol. If the
791 version is the default version to be used when resolving
792 unversioned references to the symbol then it's displayed as is,
793 otherwise it's put into parentheses.
794 --special-syms
796 When displaying symbols include those which the target considers to
797 be special in some way and which would not normally be of interest
798 to the user.
799 -V
801 --version
802 Print the version number of objdump and exit.
803 -x
805 --all-headers
806 Display all available header information, including the symbol
807 table and relocation entries. Using -x is equivalent to specifying
808 all of -a -f -h -p -r -t.
809 -w
811 --wide
812 Format some lines for output devices that have more than 80
813 columns. Also do not truncate symbol names when they are
814 displayed.
815 -z
817 --disassemble-zeroes
818 Normally the disassembly output will skip blocks of zeroes. This
819 option directs the disassembler to disassemble those blocks, just
820 like any other data.
821 @file
823 Read command-line options from file. The options read are inserted
824 in place of the original @file option. If file does not exist, or
825 cannot be read, then the option will be treated literally, and not
826 removed.
827 Options in file are separated by whitespace. A whitespace
829 character may be included in an option by surrounding the entire
830 option in either single or double quotes. Any character (including
831 a backslash) may be included by prefixing the character to be
832 included with a backslash. The file may itself contain additional
833 @file options; any such options will be processed recursively.
834
836 nm(1), readelf(1), and the Info entries for binutils.
837
839 Copyright (c) 1991-2020 Free Software Foundation, Inc.
840 Permission is granted to copy, distribute and/or modify this document
842 under the terms of the GNU Free Documentation License, Version 1.3 or
843 any later version published by the Free Software Foundation; with no
844 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
845 Texts. A copy of the license is included in the section entitled "GNU
846 Free Documentation License".
847binutils-2.35 2020-07-24 OBJDUMP(1)