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objdump(1)	      GNU Development Tools	       objdump(1)

NAME
       objdump - display information from object files.

SYNOPSIS
       objdump
	      [-a|--archive-headers] [-b bfdname |
	      --target=bfdname] [-C|--demangle] [--debugging]
	      [-d|--disassemble] [-D|--disassemble-all]
	      [--disassemble-zeroes]
	      [-EB|-EL|--endian={big|little}] [-f|--file-headers]
	      [-h|--section-headers | --headers] [-i|--info]
	      [-j section | --section=section]
	      [-l|--line-numbers] [-m machine |
	      --architecture=machine] [-p|--private-headers]
	      [--prefix-addresses] [-r|--reloc]
	      [-R|--dynamic-reloc] [-s|--full-contents]
	      [-S|--source] [--[no-]show-raw-insn] [--stabs]
	      [-t|--syms] [-T|--dynamic-syms] [-x|--all-headers]
	      [--start-address=address] [--stop-address=address]
	      [--adjust-vma=offset] [--version] [--help]
	      objfile...

DESCRIPTION
       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.

OPTIONS
       Where  long and short forms of an option are shown togeth-
       er, they are equivalent.	 At least one option  besides  -l
       (--line-numbers) must be given.

       -a

       --archive-headers
	      If any files from objfile 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

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objdump(1)	      GNU Development Tools	       objdump(1)

	      the section addresses.  This is useful if the  sec-
	      tion  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 the object-code format for the object files
	      to  be bfdname.  This may not be necessary; objdump
	      can automatically recognize many formats.	 For  ex-
	      ample,

	      objdump -b oasys -m vax -h fu.o

	      display  summary information from the section head-
	      ers (`-h') of `fu.o', which is  explicitly  identi-
	      fied (`-m') as a Vax object file in the format pro-
	      duced by Oasys compilers.	 You can list the formats
	      available with the `-i' option.

       -C

       --demangle
	      Decode (demangle) low-level symbol names into user-
	      level names.  Besides removing any  initial  under-
	      score prepended by the system, this makes C++ func-
	      tion names readable.

       --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 implement-
	      ed.

       -d

       --disassemble
	      Display the assembler mnemonics for the machine in-
	      structions  from	objfile.  This option only disas-
	      sembles those sections which are expected	 to  con-
	      tain instructions.

       -D

       --disassemble-all
	      Like  -d,	 but disassemble the contents of all sec-

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objdump(1)	      GNU Development Tools	       objdump(1)

	      tions, not just those expected to contain	 instruc-
	      tions.

       --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-headers
	      Display summary information from the overall header
	      of each file in objfile.

       -h

       --section-headers

       --headers
	      Display  summary information from the section head-
	      ers of the object file.

       --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

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objdump(1)	      GNU Development Tools	       objdump(1)

       --section=name
	      Display information only for section name.

       -l

       --line-numbers
	      Label  the  display  (using  debugging information)
	      with the filename and source  line  numbers  corre-
	      sponding	to  the	 object	 code 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 disassem-
	      bling object files which do not describe	architec-
	      ture  information, such as S-records.  You can list
	      the available architectures with the -i option.

       -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  inter-
	      spersed 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 request-
	      ed.

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objdump(1)	      GNU Development Tools	       objdump(1)

       -S

       --source
	      Display source code intermixed with disassembly, if
	      possible.	 Implies -d.

       --show-raw-insn
	      When disassembling instructions, print the instruc-
	      tion 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 --pre-
	      fix-addresses is used.

       --stabs
	      Display the contents of the .stab, .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, debug-
	      ging  symbol-table  entries  are	interleaved  with
	      linkage symbols, and are visible in the --syms out-
	      put.

       --start-address=address
	      Start  displaying	 data  at  the specified address.
	      This affects the output of the -d, -r  and  -s  op-
	      tions.

       --stop-address=address
	      Stop  displaying	data  at  the  specified address.
	      This affects the output of the -d, -r  and  -s  op-
	      tions.

       -t

       --syms Symbol  Table.   Print  the symbol table entries of
	      the file.	 This is similar to the information  pro-
	      vided by the `nm' program.

       -T

       --dynamic-syms
	      Dynamic  Symbol  Table.	Print  the dynamic symbol
	      table entries of the file.  This is only meaningful

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objdump(1)	      GNU Development Tools	       objdump(1)

	      for  dynamic  objects,  such  as	certain	 types of
	      shared libraries.	 This is similar to the	 informa-
	      tion provided by the `nm' program when given the -D
	      (--dynamic) option.

       --version
	      Print the version number of objdump and exit.

       -x

       --all-headers
	      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'.

SEE ALSO
       `binutils' entry in info; The GNU Binary Utilities, Roland
       H. Pesch (October 1991); nm(1).

COPYING
       Copyright (c) 1991, 92, 93, 94,	95,  1996  Free	 Software
       Foundation, Inc.

       Permission  is  granted	to  make  and distribute verbatim
       copies of this manual provided the  copyright  notice  and
       this permission notice are preserved on all copies.

       Permission is granted to copy and distribute modified ver-
       sions of this manual under  the	conditions  for	 verbatim
       copying,	 provided  that the entire resulting derived work
       is distributed under the	 terms	of  a  permission  notice
       identical to this one.

       Permission  is granted to copy and distribute translations
       of this manual into another language, under the above con-
       ditions for modified versions, except that this permission
       notice may be included in  translations	approved  by  the
       Free  Software  Foundation  instead of in the original En-
       glish.

cygnus support		 5 November 1991			6

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