binutils.info: objdump

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objdump

objdump [`-a'|`--archive-headers']
[`-b' BFDNAME|`--target=BFDNAME']
[`-C'|`--demangle'[=STYLE] ]
[`-d'|`--disassemble']
[`-D'|`--disassemble-all']
[`-z'|`--disassemble-zeroes']
[`-EB'|`-EL'|`--endian='{big | little }]
[`-f'|`--file-headers']
[`--file-start-context']
[`-g'|`--debugging']
[`-h'|`--section-headers'|`--headers']
[`-i'|`--info']
[`-j' SECTION|`--section='SECTION]
[`-l'|`--line-numbers']
[`-S'|`--source']
[`-m' MACHINE|`--architecture='MACHINE]
[`-M' OPTIONS|`--disassembler-options='OPTIONS]
[`-p'|`--private-headers']
[`-r'|`--reloc']
[`-R'|`--dynamic-reloc']
[`-s'|`--full-contents']
[`-G'|`--stabs']
[`-t'|`--syms']
[`-T'|`--dynamic-syms']
[`-x'|`--all-headers']
[`-w'|`--wide']
[`--start-address='ADDRESS]
[`--stop-address='ADDRESS]
[`--prefix-addresses']
[`--[no-]show-raw-insn']
[`--adjust-vma='OFFSET]
[`-V'|`--version']
[`-H'|`--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 from the list
`-a,-d,-D,-f,-g,-G,-h,-H,-p,-r,-R,-S,-t,-T,-V,-x' 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.
`--adjust-vma=OFFSET'
     When dumping information, first add OFFSET to all the section
     addresses.  This is useful if the section addresses do not
     correspond to the symbol table, which can happen when putting
     sections at particular addresses when using a format which can not
     represent section addresses, such as a.out.
`-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.  *Note Target Selection::,
     for more information.
`-C'
`--demangle[=STYLE]'
     Decode ("demangle") low-level symbol names into user-level names.
     Besides removing any initial underscore prepended by the system,
     this makes C++ function names readable.  Different compilers have
     different mangling styles. The optional demangling style argument
     can be used to choose an appropriate demangling style for your
     compiler. *Note c++filt::, for more information on demangling.

`-G'

`--debugging'
     Display debugging information.  This attempts to parse debugging
     information stored in the file and print it out using a C like
     syntax.  Only certain types of debugging information have been
     implemented.
`-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.
`--prefix-addresses'
     When disassembling, print the complete address on each line.  This
     is the older disassembly format.
`--disassemble-zeroes'
     Normally the disassembly output will skip blocks of zeroes.  This
     option directs the disassembler to disassemble those blocks, just
     like any other data.
`-EB'
`-EL'
`--endian={big|little}'
     Specify the endianness of the object files.  This only affects
     disassembly.  This can be useful when disassembling a file format
     which does not describe endianness information, such as S-records.
`-f'
`--file-header'
     Display summary information from the overall header of each of the
     OBJFILE files.
`--file-start-context'
     Specify that when displaying interlisted source code/disassembly
     (assumes `-S') from a file that has not yet been displayed, extend
     the context to the start of the file.
`-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 or relocs
     shown.  Only useful with `-d', `-D', or `-r'.
`-m MACHINE'
`--architecture=MACHINE'
     Specify the architecture to use when disassembling object files.
     This can be useful when disassembling object files which do not
     describe architecture information, such as S-records.  You can
     list the available architectures with the `-i' option.
`-M OPTIONS'
`--disassembler-options=OPTIONS'
     Pass target specific information to the disassembler.  Only
     supported on some targets.
     If the target is an ARM architecture then this switch can be used
     to select which register name set is used during disassembler.
     Specifying `-M reg-name-std' (the default) will select the
     register names as used in ARM's instruction set documentation, but
     with register 13 called 'sp', register 14 called 'lr' and register
     15 called 'pc'.  Specifying `-M reg-names-apcs' will select the
     name set used by the ARM Procedure Call Standard, whilst
     specifying `-M reg-names-raw' will just use `r' followed by the
     register number.
     There are also two variants on the APCS register naming scheme
     enabled by `-M reg-names-atpcs' and `-M reg-names-special-atpcs'
     which use the ARM/Thumb Procedure Call Standard naming
     conventions.  (Either with the normal register name or the special
     register names).
     This option can also be used for ARM architectures to force the
     disassembler to interpret all instructions as Thumb instructions by
     using the switch `--disassembler-options=force-thumb'.  This can be
     useful when attempting to disassemble thumb code produced by other
     compilers.
     For the x86, some of the options duplicate functions of the `-m'
     switch, but allow finer grained control.  Multiple selections from
     the following may be specified as a comma separated string.
     `x86-64', `i386' and `i8086' select disassembly for the given
     architecture.  `intel' and `att' select between intel syntax mode
     and AT&T syntax mode.  `addr32', `addr16', `data32' and `data16'
     specify the default address size and operand size.  These four
     options will be overridden if `x86-64', `i386' or `i8086' appear
     later in the option string.  Lastly, `suffix', when in AT&T mode,
     instructs the dissassembler to print a mnemonic suffix even when
     the suffix could be inferred by the operands.
     For PPC, `booke', `booke32' and `booke64' select disassembly of
     BookE instructions.  `32' and `64' select PowerPC and PowerPC64
     disassembly, respectively.
`-p'
`--private-headers'
     Print information that is specific to the object file format.  The
     exact information printed depends upon the object file format.
     For some object file formats, no additional information is printed.
`-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'.
`--show-raw-insn'
     When disassembling instructions, print the instruction in hex as
     well as in symbolic form.  This is the default except when
     `--prefix-addresses' is used.
`--no-show-raw-insn'
     When disassembling instructions, do not print the instruction
     bytes.  This is the default when `--prefix-addresses' is used.

`-G'

`--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.  For more information on stabs symbols, see
     *Note Stabs: (stabs.info)Top.
`--start-address=ADDRESS'
     Start displaying data at the specified address.  This affects the
     output of the `-d', `-r' and `-s' options.
`--stop-address=ADDRESS'
     Stop displaying data at the specified address.  This affects the
     output of the `-d', `-r' and `-s' options.
`-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.  Also do not truncate symbol names when they are
     displayed.