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objdump [ -a | --archive-headers ]
[ -b bfdname | --target=bfdname ]
[ -d | --disassemble ] [ -D | --disassemble-all ]
[ -f | --file-headers ]
[ -h | --section-headers | --headers ] [ -i | --info ]
[ -j section | --section=section ]
[ -l | --line-numbers ] [ -S | --source ]
[ -m machine | --architecture=machine ]
[ -r | --reloc ] [ -R | --dynamic-reloc ]
[ -s | --full-contents ] [ --stabs ]
[ -t | --syms ] [ -T | --dynamic-syms ]
[ -x | --all-headers ] [ -w | --wide ]
[ --version ] [ --help ] objfile...
objdump
displays information about one or more object files.
The options control what particular information to display. This
information is mostly useful to programmers who are working on the
compilation tools, as opposed to programmers who just want their
program to compile and work.
objfile... are the object files to be examined. When you
specify archives, objdump
shows information on each of the member
object files.
The long and short forms of options, shown here as alternatives, are
equivalent. At least one option besides `-l' must be given.
-a
--archive-header
- If any of the objfile files are archives, display the archive
header information (in a format similar to `ls -l'). Besides the
information you could list with `ar tv', `objdump -a' shows
the object file format of each archive member.
-b bfdname
--target=bfdname
- Specify that the object-code format for the object files is
bfdname. This option may not be necessary; objdump can
automatically recognize many formats.
For example,
objdump -b oasys -m vax -h fu.o
displays summary information from the section headers (`-h') of
`fu.o', which is explicitly identified (`-m') as a VAX object
file in the format produced by Oasys compilers. You can list the
formats available with the `-i' option.
See section Target Selection, for more information.
-d
--disassemble
- Display the assembler mnemonics for the machine instructions from
objfile. This option only disassembles those sections which are
expected to contain instructions.
-D
--disassemble-all
- Like `-d', but disassemble the contents of all sections, not just
those expected to contain instructions.
-f
--file-header
- Display summary information from the overall header of
each of the objfile files.
-h
--section-header
--header
- Display summary information from the section headers of the
object file.
File segments may be relocated to nonstandard addresses, for example by
using the `-Ttext', `-Tdata', or `-Tbss' options to
ld
. However, some object file formats, such as a.out, do not
store the starting address of the file segments. In those situations,
although ld
relocates the sections correctly, using `objdump
-h' to list the file section headers cannot show the correct addresses.
Instead, it shows the usual addresses, which are implicit for the
target.
--help
- Print a summary of the options to
objdump
and exit.
-i
--info
- Display a list showing all architectures and object formats available
for specification with `-b' or `-m'.
-j name
--section=name
- Display information only for section name.
-l
--line-numbers
- Label the display (using debugging information) with the filename
and source line numbers corresponding to the object code shown.
Only useful with `-d' or `-D'.
-m machine
--architecture=machine
- Specify that the object files objfile are for architecture
machine. List available architectures using the `-i'
option.
-r
--reloc
- Print the relocation entries of the file. If used with `-d' or
`-D', the relocations are printed interspersed with the
disassembly.
-R
--dynamic-reloc
- Print the dynamic relocation entries of the file. This is only
meaningful for dynamic objects, such as certain types of shared
libraries.
-s
--full-contents
- Display the full contents of any sections requested.
-S
--source
- Display source code intermixed with disassembly, if possible. Implies
`-d'.
--stabs
- Display the full contents of any sections requested. Display the
contents of the .stab and .stab.index and .stab.excl sections from an
ELF file. This is only useful on systems (such as Solaris 2.0) in which
.stab
debugging symbol-table entries are carried in an ELF
section. In most other file formats, debugging symbol-table entries are
interleaved with linkage symbols, and are visible in the `--syms'
output.
-t
--syms
- Print the symbol table entries of the file.
This is similar to the information provided by the `nm' program.
-T
--dynamic-syms
- Print the dynamic symbol table entries of the file. This is only
meaningful for dynamic objects, such as certain types of shared
libraries. This is similar to the information provided by the `nm'
program when given the `-D' (`--dynamic') option.
--version
- Print the version number of
objdump
and exit.
-x
--all-header
- Display all available header information, including the symbol table and
relocation entries. Using `-x' is equivalent to specifying all of
`-a -f -h -r -t'.
-w
-
--wide
- Format some lines for output devices that have more than 80 columns.
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