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[lLiaprmfFsoRtUuTgAckK]|
35 --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=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 [--prefix-addresses]
45 [--[no-]show-raw-insn]
46 [--adjust-vma=offset]
47 [--dwarf-depth=n]
48 [--dwarf-start=n]
49 [--ctf-parent=section]
50 [--no-recurse-limit|--recurse-limit]
51 [--special-syms]
52 [--prefix=prefix]
53 [--prefix-strip=level]
54 [--insn-width=width]
55 [--visualize-jumps[=color|=extended-color|=off]
56 [-V|--version]
57 [-H|--help]
58 objfile...
59
61 objdump displays information about one or more object files. The
62 options control what particular information to display. This
63 information is mostly useful to programmers who are working on the
64 compilation tools, as opposed to programmers who just want their
65 program to compile and work.
66 objfile... are the object files to be examined. When you specify
68 archives, objdump shows information on each of the member object files.
69
71 The long and short forms of options, shown here as alternatives, are
72 equivalent. At least one option from the list
73 -a,-d,-D,-e,-f,-g,-G,-h,-H,-p,-P,-r,-R,-s,-S,-t,-T,-V,-x must be given.
74 -a
76 --archive-header
77 If any of the objfile files are archives, display the archive
78 header information (in a format similar to ls -l). Besides the
79 information you could list with ar tv, objdump -a shows the object
80 file format of each archive member.
81 --adjust-vma=offset
83 When dumping information, first add offset to all the section
84 addresses. This is useful if the section addresses do not
85 correspond to the symbol table, which can happen when putting
86 sections at particular addresses when using a format which can not
87 represent section addresses, such as a.out.
88 -b bfdname
90 --target=bfdname
91 Specify that the object-code format for the object files is
92 bfdname. This option may not be necessary; objdump can
93 automatically recognize many formats.
94 For example,
96 objdump -b oasys -m vax -h fu.o
98 displays summary information from the section headers (-h) of fu.o,
100 which is explicitly identified (-m) as a VAX object file in the
101 format produced by Oasys compilers. You can list the formats
102 available with the -i option.
103 -C
105 --demangle[=style]
106 Decode (demangle) low-level symbol names into user-level names.
107 Besides removing any initial underscore prepended by the system,
108 this makes C++ function names readable. Different compilers have
109 different mangling styles. The optional demangling style argument
110 can be used to choose an appropriate demangling style for your
111 compiler.
112 --recurse-limit
114 --no-recurse-limit
115 --recursion-limit
116 --no-recursion-limit
117 Enables or disables a limit on the amount of recursion performed
118 whilst demangling strings. Since the name mangling formats allow
119 for an inifinite level of recursion it is possible to create
120 strings whose decoding will exhaust the amount of stack space
121 available on the host machine, triggering a memory fault. The
122 limit tries to prevent this from happening by restricting recursion
123 to 2048 levels of nesting.
124 The default is for this limit to be enabled, but disabling it may
126 be necessary in order to demangle truly complicated names. Note
127 however that if the recursion limit is disabled then stack
128 exhaustion is possible and any bug reports about such an event will
129 be rejected.
130 -g
132 --debugging
133 Display debugging information. This attempts to parse STABS
134 debugging format information stored in the file and print it out
135 using a C like syntax. If no STABS debuging was found this option
136 falls back on the -W option to print any DWARF information in the
137 file.
138 -e
140 --debugging-tags
141 Like -g, but the information is generated in a format compatible
142 with ctags tool.
143 -d
145 --disassemble
146 --disassemble=symbol
147 Display the assembler mnemonics for the machine instructions from
148 the input file. This option only disassembles those sections which
149 are expected to contain instructions. If the optional symbol
150 argument is given, then display the assembler mnemonics starting at
151 symbol. If symbol is a function name then disassembly will stop at
152 the end of the function, otherwise it will stop when the next
153 symbol is encountered. If there are no matches for symbol then
154 nothing will be displayed.
155 Note if the --dwarf=follow-links option has also been enabled then
157 any symbol tables in linked debug info files will be read in and
158 used when disassembling.
159 -D
161 --disassemble-all
162 Like -d, but disassemble the contents of all sections, not just
163 those expected to contain instructions.
164 This option also has a subtle effect on the disassembly of
166 instructions in code sections. When option -d is in effect objdump
167 will assume that any symbols present in a code section occur on the
168 boundary between instructions and it will refuse to disassemble
169 across such a boundary. When option -D is in effect however this
170 assumption is supressed. This means that it is possible for the
171 output of -d and -D to differ if, for example, data is stored in
172 code sections.
173 If the target is an ARM architecture this switch also has the
175 effect of forcing the disassembler to decode pieces of data found
176 in code sections as if they were instructions.
177 Note if the --dwarf=follow-links option has also been enabled then
179 any symbol tables in linked debug info files will be read in and
180 used when disassembling.
181 --prefix-addresses
183 When disassembling, print the complete address on each line. This
184 is the older disassembly format.
185 -EB
187 -EL
188 --endian={big|little}
189 Specify the endianness of the object files. This only affects
190 disassembly. This can be useful when disassembling a file format
191 which does not describe endianness information, such as S-records.
192 -f
194 --file-headers
195 Display summary information from the overall header of each of the
196 objfile files.
197 -F
199 --file-offsets
200 When disassembling sections, whenever a symbol is displayed, also
201 display the file offset of the region of data that is about to be
202 dumped. If zeroes are being skipped, then when disassembly
203 resumes, tell the user how many zeroes were skipped and the file
204 offset of the location from where the disassembly resumes. When
205 dumping sections, display the file offset of the location from
206 where the dump starts.
207 --file-start-context
209 Specify that when displaying interlisted source code/disassembly
210 (assumes -S) from a file that has not yet been displayed, extend
211 the context to the start of the file.
212 -h
214 --section-headers
215 --headers
216 Display summary information from the section headers of the object
217 file.
218 File segments may be relocated to nonstandard addresses, for
220 example by using the -Ttext, -Tdata, or -Tbss options to ld.
221 However, some object file formats, such as a.out, do not store the
222 starting address of the file segments. In those situations,
223 although ld relocates the sections correctly, using objdump -h to
224 list the file section headers cannot show the correct addresses.
225 Instead, it shows the usual addresses, which are implicit for the
226 target.
227 Note, in some cases it is possible for a section to have both the
229 READONLY and the NOREAD attributes set. In such cases the NOREAD
230 attribute takes precedence, but objdump will report both since the
231 exact setting of the flag bits might be important.
232 -H
234 --help
235 Print a summary of the options to objdump and exit.
236 -i
238 --info
239 Display a list showing all architectures and object formats
240 available for specification with -b or -m.
241 -j name
243 --section=name
244 Display information only for section name.
245 -l
247 --line-numbers
248 Label the display (using debugging information) with the filename
249 and source line numbers corresponding to the object code or relocs
250 shown. Only useful with -d, -D, or -r.
251 -m machine
253 --architecture=machine
254 Specify the architecture to use when disassembling object files.
255 This can be useful when disassembling object files which do not
256 describe architecture information, such as S-records. You can list
257 the available architectures with the -i option.
258 If the target is an ARM architecture then this switch has an
260 additional effect. It restricts the disassembly to only those
261 instructions supported by the architecture specified by machine.
262 If it is necessary to use this switch because the input file does
263 not contain any architecture information, but it is also desired to
264 disassemble all the instructions use -marm.
265 -M options
267 --disassembler-options=options
268 Pass target specific information to the disassembler. Only
269 supported on some targets. If it is necessary to specify more than
270 one disassembler option then multiple -M options can be used or can
271 be placed together into a comma separated list.
272 For ARC, dsp controls the printing of DSP instructions, spfp
274 selects the printing of FPX single precision FP instructions, dpfp
275 selects the printing of FPX double precision FP instructions,
276 quarkse_em selects the printing of special QuarkSE-EM instructions,
277 fpuda selects the printing of double precision assist instructions,
278 fpus selects the printing of FPU single precision FP instructions,
279 while fpud selects the printing of FPU double precision FP
280 instructions. Additionally, one can choose to have all the
281 immediates printed in hexadecimal using hex. By default, the short
282 immediates are printed using the decimal representation, while the
283 long immediate values are printed as hexadecimal.
284 cpu=... allows to enforce a particular ISA when disassembling
286 instructions, overriding the -m value or whatever is in the ELF
287 file. This might be useful to select ARC EM or HS ISA, because
288 architecture is same for those and disassembler relies on private
289 ELF header data to decide if code is for EM or HS. This option
290 might be specified multiple times - only the latest value will be
291 used. Valid values are same as for the assembler -mcpu=... option.
292 If the target is an ARM architecture then this switch can be used
294 to select which register name set is used during disassembler.
295 Specifying -M reg-names-std (the default) will select the register
296 names as used in ARM's instruction set documentation, but with
297 register 13 called 'sp', register 14 called 'lr' and register 15
298 called 'pc'. Specifying -M reg-names-apcs will select the name set
299 used by the ARM Procedure Call Standard, whilst specifying -M reg-
300 names-raw will just use r followed by the register number.
301 There are also two variants on the APCS register naming scheme
303 enabled by -M reg-names-atpcs and -M reg-names-special-atpcs which
304 use the ARM/Thumb Procedure Call Standard naming conventions.
305 (Either with the normal register names or the special register
306 names).
307 This option can also be used for ARM architectures to force the
309 disassembler to interpret all instructions as Thumb instructions by
310 using the switch --disassembler-options=force-thumb. This can be
311 useful when attempting to disassemble thumb code produced by other
312 compilers.
313 For AArch64 targets this switch can be used to set whether
315 instructions are disassembled as the most general instruction using
316 the -M no-aliases option or whether instruction notes should be
317 generated as comments in the disasssembly using -M notes.
318 For the x86, some of the options duplicate functions of the -m
320 switch, but allow finer grained control. Multiple selections from
321 the following may be specified as a comma separated string.
322 "x86-64"
324 "i386"
325 "i8086"
326 Select disassembly for the given architecture.
327 "intel"
329 "att"
330 Select between intel syntax mode and AT&T syntax mode.
331 "amd64"
333 "intel64"
334 Select between AMD64 ISA and Intel64 ISA.
335 "intel-mnemonic"
337 "att-mnemonic"
338 Select between intel mnemonic mode and AT&T mnemonic mode.
339 Note: "intel-mnemonic" implies "intel" and "att-mnemonic"
340 implies "att".
341 "addr64"
343 "addr32"
344 "addr16"
345 "data32"
346 "data16"
347 Specify the default address size and operand size. These five
348 options will be overridden if "x86-64", "i386" or "i8086"
349 appear later in the option string.
350 "suffix"
352 When in AT&T mode, instructs the disassembler to print a
353 mnemonic suffix even when the suffix could be inferred by the
354 operands.
355 For PowerPC, the -M argument raw selects disasssembly of hardware
357 insns rather than aliases. For example, you will see "rlwinm"
358 rather than "clrlwi", and "addi" rather than "li". All of the -m
359 arguments for gas that select a CPU are supported. These are: 403,
360 405, 440, 464, 476, 601, 603, 604, 620, 7400, 7410, 7450, 7455,
361 750cl, 821, 850, 860, a2, booke, booke32, cell, com, e200z4, e300,
362 e500, e500mc, e500mc64, e500x2, e5500, e6500, efs, power4, power5,
363 power6, power7, power8, power9, ppc, ppc32, ppc64, ppc64bridge,
364 ppcps, pwr, pwr2, pwr4, pwr5, pwr5x, pwr6, pwr7, pwr8, pwr9, pwrx,
365 titan, and vle. 32 and 64 modify the default or a prior CPU
366 selection, disabling and enabling 64-bit insns respectively. In
367 addition, altivec, any, htm, vsx, and spe add capabilities to a
368 previous or later CPU selection. any will disassemble any opcode
369 known to binutils, but in cases where an opcode has two different
370 meanings or different arguments, you may not see the disassembly
371 you expect. If you disassemble without giving a CPU selection, a
372 default will be chosen from information gleaned by BFD from the
373 object files headers, but the result again may not be as you
374 expect.
375 For MIPS, this option controls the printing of instruction mnemonic
377 names and register names in disassembled instructions. Multiple
378 selections from the following may be specified as a comma separated
379 string, and invalid options are ignored:
380 "no-aliases"
382 Print the 'raw' instruction mnemonic instead of some pseudo
383 instruction mnemonic. I.e., print 'daddu' or 'or' instead of
384 'move', 'sll' instead of 'nop', etc.
385 "msa"
387 Disassemble MSA instructions.
388 "virt"
390 Disassemble the virtualization ASE instructions.
391 "xpa"
393 Disassemble the eXtended Physical Address (XPA) ASE
394 instructions.
395 "gpr-names=ABI"
397 Print GPR (general-purpose register) names as appropriate for
398 the specified ABI. By default, GPR names are selected
399 according to the ABI of the binary being disassembled.
400 "fpr-names=ABI"
402 Print FPR (floating-point register) names as appropriate for
403 the specified ABI. By default, FPR numbers are printed rather
404 than names.
405 "cp0-names=ARCH"
407 Print CP0 (system control coprocessor; coprocessor 0) register
408 names as appropriate for the CPU or architecture specified by
409 ARCH. By default, CP0 register names are selected according to
410 the architecture and CPU of the binary being disassembled.
411 "hwr-names=ARCH"
413 Print HWR (hardware register, used by the "rdhwr" instruction)
414 names as appropriate for the CPU or architecture specified by
415 ARCH. By default, HWR names are selected according to the
416 architecture and CPU of the binary being disassembled.
417 "reg-names=ABI"
419 Print GPR and FPR names as appropriate for the selected ABI.
420 "reg-names=ARCH"
422 Print CPU-specific register names (CP0 register and HWR names)
423 as appropriate for the selected CPU or architecture.
424 For any of the options listed above, ABI or ARCH may be specified
426 as numeric to have numbers printed rather than names, for the
427 selected types of registers. You can list the available values of
428 ABI and ARCH using the --help option.
429 For VAX, you can specify function entry addresses with -M
431 entry:0xf00ba. You can use this multiple times to properly
432 disassemble VAX binary files that don't contain symbol tables (like
433 ROM dumps). In these cases, the function entry mask would
434 otherwise be decoded as VAX instructions, which would probably lead
435 the rest of the function being wrongly disassembled.
436 -p
438 --private-headers
439 Print information that is specific to the object file format. The
440 exact information printed depends upon the object file format. For
441 some object file formats, no additional information is printed.
442 -P options
444 --private=options
445 Print information that is specific to the object file format. The
446 argument options is a comma separated list that depends on the
447 format (the lists of options is displayed with the help).
448 For XCOFF, the available options are:
450 "header"
452 "aout"
453 "sections"
454 "syms"
455 "relocs"
456 "lineno,"
457 "loader"
458 "except"
459 "typchk"
460 "traceback"
461 "toc"
462 "ldinfo"
463 Not all object formats support this option. In particular the ELF
465 format does not use it.
466 -r
468 --reloc
469 Print the relocation entries of the file. If used with -d or -D,
470 the relocations are printed interspersed with the disassembly.
471 -R
473 --dynamic-reloc
474 Print the dynamic relocation entries of the file. This is only
475 meaningful for dynamic objects, such as certain types of shared
476 libraries. As for -r, if used with -d or -D, the relocations are
477 printed interspersed with the disassembly.
478 -s
480 --full-contents
481 Display the full contents of any sections requested. By default
482 all non-empty sections are displayed.
483 -S
485 --source
486 Display source code intermixed with disassembly, if possible.
487 Implies -d.
488 --source-comment[=txt]
490 Like the -S option, but all source code lines are displayed with a
491 prefix of txt. Typically txt will be a comment string which can be
492 used to distinguish the assembler code from the source code. If
493 txt is not provided then a default string of "# " (hash followed by
494 a space), will be used.
495 --prefix=prefix
497 Specify prefix to add to the absolute paths when used with -S.
498 --prefix-strip=level
500 Indicate how many initial directory names to strip off the
501 hardwired absolute paths. It has no effect without --prefix=prefix.
502 --show-raw-insn
504 When disassembling instructions, print the instruction in hex as
505 well as in symbolic form. This is the default except when
506 --prefix-addresses is used.
507 --no-show-raw-insn
509 When disassembling instructions, do not print the instruction
510 bytes. This is the default when --prefix-addresses is used.
511 --insn-width=width
513 Display width bytes on a single line when disassembling
514 instructions.
515 --visualize-jumps[=color|=extended-color|=off]
517 Visualize jumps that stay inside a function by drawing ASCII art
518 between the start and target addresses. The optional =color
519 argument adds color to the output using simple terminal colors.
520 Alternatively the =extended-color argument will add color using
521 8bit colors, but these might not work on all terminals.
522 If it is necessary to disable the visualize-jumps option after it
524 has previously been enabled then use visualize-jumps=off.
525 -W[lLiaprmfFsoRtUuTgAckK]
527 --dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges,=pubtypes,=trace_info,=trace_abbrev,=trace_aranges,=gdb_index,=addr,=cu_index,=links,=follow-links]
528 Displays the contents of the DWARF debug sections in the file, if
529 any are present. Compressed debug sections are automatically
530 decompressed (temporarily) before they are displayed. If one or
531 more of the optional letters or words follows the switch then only
532 those type(s) of data will be dumped. The letters and words refer
533 to the following information:
534 "a"
536 "=abbrev"
537 Displays the contents of the .debug_abbrev section.
538 "A"
540 "=addr"
541 Displays the contents of the .debug_addr section.
542 "c"
544 "=cu_index"
545 Displays the contents of the .debug_cu_index and/or
546 .debug_tu_index sections.
547 "f"
549 "=frames"
550 Display the raw contents of a .debug_frame section.
551 "F"
553 "=frame-interp"
554 Display the interpreted contents of a .debug_frame section.
555 "g"
557 "=gdb_index"
558 Displays the contents of the .gdb_index and/or .debug_names
559 sections.
560 "i"
562 "=info"
563 Displays the contents of the .debug_info section. Note: the
564 output from this option can also be restricted by the use of
565 the --dwarf-depth and --dwarf-start options.
566 "k"
568 "=links"
569 Displays the contents of the .gnu_debuglink and/or
570 .gnu_debugaltlink sections. Also displays any links to
571 separate dwarf object files (dwo), if they are specified by the
572 DW_AT_GNU_dwo_name or DW_AT_dwo_name attributes in the
573 .debug_info section.
574 "K"
576 "=follow-links"
577 Display the contents of any selected debug sections that are
578 found in linked, separate debug info file(s). This can result
579 in multiple versions of the same debug section being displayed
580 if it exists in more than one file.
581 In addition, when displaying DWARF attributes, if a form is
583 found that references the separate debug info file, then the
584 referenced contents will also be displayed.
585 "l"
587 "=rawline"
588 Displays the contents of the .debug_line section in a raw
589 format.
590 "L"
592 "=decodedline"
593 Displays the interpreted contents of the .debug_line section.
594 "m"
596 "=macro"
597 Displays the contents of the .debug_macro and/or .debug_macinfo
598 sections.
599 "o"
601 "=loc"
602 Displays the contents of the .debug_loc and/or .debug_loclists
603 sections.
604 "p"
606 "=pubnames"
607 Displays the contents of the .debug_pubnames and/or
608 .debug_gnu_pubnames sections.
609 "r"
611 "=aranges"
612 Displays the contents of the .debug_aranges section.
613 "R"
615 "=Ranges"
616 Displays the contents of the .debug_ranges and/or
617 .debug_rnglists sections.
618 "s"
620 "=str"
621 Displays the contents of the .debug_str, .debug_line_str and/or
622 .debug_str_offsets sections.
623 "t"
625 "=pubtype"
626 Displays the contents of the .debug_pubtypes and/or
627 .debug_gnu_pubtypes sections.
628 "T"
630 "=trace_aranges"
631 Displays the contents of the .trace_aranges section.
632 "u"
634 "=trace_abbrev"
635 Displays the contents of the .trace_abbrev section.
636 "U"
638 "=trace_info"
639 Displays the contents of the .trace_info section.
640 Note: displaying the contents of .debug_static_funcs,
642 .debug_static_vars and debug_weaknames sections is not currently
643 supported.
644 --dwarf-depth=n
646 Limit the dump of the ".debug_info" section to n children. This is
647 only useful with --debug-dump=info. The default is to print all
648 DIEs; the special value 0 for n will also have this effect.
649 With a non-zero value for n, DIEs at or deeper than n levels will
651 not be printed. The range for n is zero-based.
652 --dwarf-start=n
654 Print only DIEs beginning with the DIE numbered n. This is only
655 useful with --debug-dump=info.
656 If specified, this option will suppress printing of any header
658 information and all DIEs before the DIE numbered n. Only siblings
659 and children of the specified DIE will be printed.
660 This can be used in conjunction with --dwarf-depth.
662 --dwarf-check
664 Enable additional checks for consistency of Dwarf information.
665 --ctf=section
667 Display the contents of the specified CTF section. CTF sections
668 themselves contain many subsections, all of which are displayed in
669 order.
670 --ctf-parent=section
672 Specify the name of another section from which the CTF dictionary
673 can inherit types. (If none is specified, we assume the CTF
674 dictionary inherits types from the default-named member of the
675 archive contained within this section.)
676 -G
678 --stabs
679 Display the full contents of any sections requested. Display the
680 contents of the .stab and .stab.index and .stab.excl sections from
681 an ELF file. This is only useful on systems (such as Solaris 2.0)
682 in which ".stab" debugging symbol-table entries are carried in an
683 ELF section. In most other file formats, debugging symbol-table
684 entries are interleaved with linkage symbols, and are visible in
685 the --syms output.
686 --start-address=address
688 Start displaying data at the specified address. This affects the
689 output of the -d, -r and -s options.
690 --stop-address=address
692 Stop displaying data at the specified address. This affects the
693 output of the -d, -r and -s options.
694 -t
696 --syms
697 Print the symbol table entries of the file. This is similar to the
698 information provided by the nm program, although the display format
699 is different. The format of the output depends upon the format of
700 the file being dumped, but there are two main types. One looks
701 like this:
702 [ 4](sec 3)(fl 0x00)(ty 0)(scl 3) (nx 1) 0x00000000 .bss
704 [ 6](sec 1)(fl 0x00)(ty 0)(scl 2) (nx 0) 0x00000000 fred
705 where the number inside the square brackets is the number of the
707 entry in the symbol table, the sec number is the section number,
708 the fl value are the symbol's flag bits, the ty number is the
709 symbol's type, the scl number is the symbol's storage class and the
710 nx value is the number of auxilary entries associated with the
711 symbol. The last two fields are the symbol's value and its name.
712 The other common output format, usually seen with ELF based files,
714 looks like this:
715 00000000 l d .bss 00000000 .bss
717 00000000 g .text 00000000 fred
718 Here the first number is the symbol's value (sometimes refered to
720 as its address). The next field is actually a set of characters
721 and spaces indicating the flag bits that are set on the symbol.
722 These characters are described below. Next is the section with
723 which the symbol is associated or *ABS* if the section is absolute
724 (ie not connected with any section), or *UND* if the section is
725 referenced in the file being dumped, but not defined there.
726 After the section name comes another field, a number, which for
728 common symbols is the alignment and for other symbol is the size.
729 Finally the symbol's name is displayed.
730 The flag characters are divided into 7 groups as follows:
732 "l"
734 "g"
735 "u"
736 "!" The symbol is a local (l), global (g), unique global (u),
737 neither global nor local (a space) or both global and local
738 (!). A symbol can be neither local or global for a variety of
739 reasons, e.g., because it is used for debugging, but it is
740 probably an indication of a bug if it is ever both local and
741 global. Unique global symbols are a GNU extension to the
742 standard set of ELF symbol bindings. For such a symbol the
743 dynamic linker will make sure that in the entire process there
744 is just one symbol with this name and type in use.
745 "w" The symbol is weak (w) or strong (a space).
747 "C" The symbol denotes a constructor (C) or an ordinary symbol (a
749 space).
750 "W" The symbol is a warning (W) or a normal symbol (a space). A
752 warning symbol's name is a message to be displayed if the
753 symbol following the warning symbol is ever referenced.
754 "I"
756 "i" The symbol is an indirect reference to another symbol (I), a
757 function to be evaluated during reloc processing (i) or a
758 normal symbol (a space).
759 "d"
761 "D" The symbol is a debugging symbol (d) or a dynamic symbol (D) or
762 a normal symbol (a space).
763 "F"
765 "f"
766 "O" The symbol is the name of a function (F) or a file (f) or an
767 object (O) or just a normal symbol (a space).
768 -T
770 --dynamic-syms
771 Print the dynamic symbol table entries of the file. This is only
772 meaningful for dynamic objects, such as certain types of shared
773 libraries. This is similar to the information provided by the nm
774 program when given the -D (--dynamic) option.
775 The output format is similar to that produced by the --syms option,
777 except that an extra field is inserted before the symbol's name,
778 giving the version information associated with the symbol. If the
779 version is the default version to be used when resolving
780 unversioned references to the symbol then it's displayed as is,
781 otherwise it's put into parentheses.
782 --special-syms
784 When displaying symbols include those which the target considers to
785 be special in some way and which would not normally be of interest
786 to the user.
787 -V
789 --version
790 Print the version number of objdump and exit.
791 -x
793 --all-headers
794 Display all available header information, including the symbol
795 table and relocation entries. Using -x is equivalent to specifying
796 all of -a -f -h -p -r -t.
797 -w
799 --wide
800 Format some lines for output devices that have more than 80
801 columns. Also do not truncate symbol names when they are
802 displayed.
803 -z
805 --disassemble-zeroes
806 Normally the disassembly output will skip blocks of zeroes. This
807 option directs the disassembler to disassemble those blocks, just
808 like any other data.
809 @file
811 Read command-line options from file. The options read are inserted
812 in place of the original @file option. If file does not exist, or
813 cannot be read, then the option will be treated literally, and not
814 removed.
815 Options in file are separated by whitespace. A whitespace
817 character may be included in an option by surrounding the entire
818 option in either single or double quotes. Any character (including
819 a backslash) may be included by prefixing the character to be
820 included with a backslash. The file may itself contain additional
821 @file options; any such options will be processed recursively.
822
824 nm(1), readelf(1), and the Info entries for binutils.
825
827 Copyright (c) 1991-2020 Free Software Foundation, Inc.
828 Permission is granted to copy, distribute and/or modify this document
830 under the terms of the GNU Free Documentation License, Version 1.3 or
831 any later version published by the Free Software Foundation; with no
832 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
833 Texts. A copy of the license is included in the section entitled "GNU
834 Free Documentation License".
835binutils-2.34 2021-01-28 OBJDUMP(1)