- infile
- outfile
- The input and output files, respectively. If you do not specify
      outfile, objcopy creates a temporary file and destructively
      renames the result with the name of infile.
- -I bfdname
- --input-target=bfdname
- Consider the source file's object format to be bfdname, rather than
      attempting to deduce it.
- -O bfdname
- --output-target=bfdname
- Write the output file using the object format bfdname.
- -F bfdname
- --target=bfdname
- Use bfdname as the object format for both the input and the output
      file; i.e., simply transfer data from source to destination with no
      translation.
- -B bfdarch
- --binary-architecture=bfdarch
- Useful when transforming a architecture-less input file into an object
      file. In this case the output architecture can be set to bfdarch.
      This option will be ignored if the input file has a known bfdarch.
      You can access this binary data inside a program by referencing the
      special symbols that are created by the conversion process. These symbols
      are called _binary_objfile_start, _binary_objfile_end and
      _binary_objfile_size. e.g. you can transform a picture file into an
      object file and then access it in your code using these symbols.
- -j sectionpattern
- --only-section=sectionpattern
- Copy only the indicated sections from the input file to the output file.
      This option may be given more than once. Note that using this option
      inappropriately may make the output file unusable. Wildcard characters are
      accepted in sectionpattern.
    If the first character of sectionpattern is the
        exclamation point (!) then matching sections will not be copied, even if
        earlier use of --only-section on the same command line would
        otherwise copy it. For example: 
 
          --only-section=.text.* --only-section=!.text.foo
    will copy all sectinos maching '.text.*' but not the section
        '.text.foo'. 
- -R sectionpattern
- --remove-section=sectionpattern
- Remove any section matching sectionpattern from the output file.
      This option may be given more than once. Note that using this option
      inappropriately may make the output file unusable. Wildcard characters are
      accepted in sectionpattern. Using both the -j and -R
      options together results in undefined behaviour.
    If the first character of sectionpattern is the
        exclamation point (!) then matching sections will not be removed even if
        an earlier use of --remove-section on the same command line would
        otherwise remove it. For example: 
 
          --remove-section=.text.* --remove-section=!.text.foo
    will remove all sections matching the pattern '.text.*', but
        will not remove the section '.text.foo'. 
- --keep-section=sectionpattern
- When removing sections from the output file, keep sections that match
      sectionpattern.
- --remove-relocations=sectionpattern
- Remove non-dynamic relocations from the output file for any section
      matching sectionpattern. This option may be given more than once.
      Note that using this option inappropriately may make the output file
      unusable, and attempting to remove a dynamic relocation section such as
      .rela.plt from an executable or shared library with
      --remove-relocations=.plt will not work. Wildcard characters are
      accepted in sectionpattern. For example:
    
 
          --remove-relocations=.text.*
    will remove the relocations for all sections matching the
        pattern '.text.*'. If the first character of sectionpattern is the
        exclamation point (!) then matching sections will not have their
        relocation removed even if an earlier use of --remove-relocations
        on the same command line would otherwise cause the relocations to be
        removed. For example: 
 
          --remove-relocations=.text.* --remove-relocations=!.text.foo
    will remove all relocations for sections matching the pattern
        '.text.*', but will not remove relocations for the section
      '.text.foo'. 
- -S
- --strip-all
- Do not copy relocation and symbol information from the source file.
- -g
- --strip-debug
- Do not copy debugging symbols or sections from the source file.
- --strip-unneeded
- Strip all symbols that are not needed for relocation processing.
- -K symbolname
- --keep-symbol=symbolname
- When stripping symbols, keep symbol symbolname even if it would
      normally be stripped. This option may be given more than once.
- -N symbolname
- --strip-symbol=symbolname
- Do not copy symbol symbolname from the source file. This option may
      be given more than once.
- --strip-unneeded-symbol=symbolname
- Do not copy symbol symbolname from the source file unless it is
      needed by a relocation. This option may be given more than once.
- -G symbolname
- --keep-global-symbol=symbolname
- Keep only symbol symbolname global. Make all other symbols local to
      the file, so that they are not visible externally. This option may be
      given more than once. Note: this option cannot be used in conjunction with
      the --globalize-symbol or --globalize-symbols options.
- --localize-hidden
- In an ELF object, mark all symbols that have hidden or internal visibility
      as local. This option applies on top of symbol-specific localization
      options such as -L.
- -L symbolname
- --localize-symbol=symbolname
- Convert a global or weak symbol called symbolname into a local
      symbol, so that it is not visible externally. This option may be given
      more than once. Note - unique symbols are not converted.
- -W symbolname
- --weaken-symbol=symbolname
- Make symbol symbolname weak. This option may be given more than
      once.
- --globalize-symbol=symbolname
- Give symbol symbolname global scoping so that it is visible outside
      of the file in which it is defined. This option may be given more than
      once. Note: this option cannot be used in conjunction with the -G
      or --keep-global-symbol options.
- -w
- --wildcard
- Permit regular expressions in symbolnames used in other command
      line options. The question mark (?), asterisk (*), backslash (\) and
      square brackets ([]) operators can be used anywhere in the symbol name. If
      the first character of the symbol name is the exclamation point (!) then
      the sense of the switch is reversed for that symbol. For example:
    
 
          -w -W !foo -W fo*
    would cause objcopy to weaken all symbols that start with
        "fo" except for the symbol "foo". 
- -x
- --discard-all
- Do not copy non-global symbols from the source file.
- -X
- --discard-locals
- Do not copy compiler-generated local symbols. (These usually start with
      L or ..)
- -b byte
- --byte=byte
- If interleaving has been enabled via the --interleave option then
      start the range of bytes to keep at the byteth byte. byte
      can be in the range from 0 to breadth-1, where breadth is
      the value given by the --interleave option.
- -i [breadth]
- --interleave[=breadth]
- Only copy a range out of every breadth bytes. (Header data is not
      affected). Select which byte in the range begins the copy with the
      --byte option. Select the width of the range with the
      --interleave-width option.
    This option is useful for creating files to program ROM. It is
        typically used with an "srec" output
        target. Note that objcopy will complain if you do not specify the
        --byte option as well. The default interleave breadth is 4, so with --byte set
        to 0, objcopy would copy the first byte out of every four bytes
        from the input to the output. 
- --interleave-width=width
- When used with the --interleave option, copy width bytes at
      a time. The start of the range of bytes to be copied is set by the
      --byte option, and the extent of the range is set with the
      --interleave option.
    The default value for this option is 1. The value of
        width plus the byte value set by the --byte option
        must not exceed the interleave breadth set by the --interleave
        option. This option can be used to create images for two 16-bit
        flashes interleaved in a 32-bit bus by passing -b 0 -i 4
        --interleave-width=2 and -b 2 -i 4 --interleave-width=2 to
        two objcopy commands. If the input was '12345678' then the
        outputs would be '1256' and '3478' respectively. 
- -p
- --preserve-dates
- Set the access and modification dates of the output file to be the same as
      those of the input file.
- -D
- --enable-deterministic-archives
- Operate in deterministic mode. When copying archive members and
      writing the archive index, use zero for UIDs, GIDs, timestamps, and use
      consistent file modes for all files.
    If binutils was configured with
        --enable-deterministic-archives, then this mode is on by default.
        It can be disabled with the -U option, below. 
- -U
- --disable-deterministic-archives
- Do not operate in deterministic mode. This is the inverse of
      the -D option, above: when copying archive members and writing the
      archive index, use their actual UID, GID, timestamp, and file mode values.
    This is the default unless binutils was configured with
        --enable-deterministic-archives. 
- --debugging
- Convert debugging information, if possible. This is not the default
      because only certain debugging formats are supported, and the conversion
      process can be time consuming.
- --gap-fill val
- Fill gaps between sections with val. This operation applies to the
      load address (LMA) of the sections. It is done by increasing the
      size of the section with the lower address, and filling in the extra space
      created with val.
- --pad-to address
- Pad the output file up to the load address address. This is done by
      increasing the size of the last section. The extra space is filled in with
      the value specified by --gap-fill (default zero).
- --set-start val
- Set the start address of the new file to val. Not all object file
      formats support setting the start address.
- --change-start incr
- --adjust-start incr
- Change the start address by adding incr. Not all object file
      formats support setting the start address.
- --change-addresses incr
- --adjust-vma incr
- Change the VMA and LMA addresses of all sections, as well as the start
      address, by adding incr. Some object file formats do not permit
      section addresses to be changed arbitrarily. Note that this does not
      relocate the sections; if the program expects sections to be loaded at a
      certain address, and this option is used to change the sections such that
      they are loaded at a different address, the program may fail.
- --change-section-address
    sectionpattern{=,+,-}val
- --adjust-section-vma
    sectionpattern{=,+,-}val
- Set or change both the VMA address and the LMA address of any section
      matching sectionpattern. If = is used, the section address
      is set to val. Otherwise, val is added to or subtracted from
      the section address. See the comments under --change-addresses,
      above. If sectionpattern does not match any sections in the input
      file, a warning will be issued, unless --no-change-warnings is
      used.
- --change-section-lma
    sectionpattern{=,+,-}val
- Set or change the LMA address of any sections matching
      sectionpattern. The LMA address is the address where the section
      will be loaded into memory at program load time. Normally this is the same
      as the VMA address, which is the address of the section at program run
      time, but on some systems, especially those where a program is held in
      ROM, the two can be different. If = is used, the section address is
      set to val. Otherwise, val is added to or subtracted from
      the section address. See the comments under --change-addresses,
      above. If sectionpattern does not match any sections in the input
      file, a warning will be issued, unless --no-change-warnings is
      used.
- --change-section-vma
    sectionpattern{=,+,-}val
- Set or change the VMA address of any section matching
      sectionpattern. The VMA address is the address where the section
      will be located once the program has started executing. Normally this is
      the same as the LMA address, which is the address where the section will
      be loaded into memory, but on some systems, especially those where a
      program is held in ROM, the two can be different. If = is used, the
      section address is set to val. Otherwise, val is added to or
      subtracted from the section address. See the comments under
      --change-addresses, above. If sectionpattern does not match
      any sections in the input file, a warning will be issued, unless
      --no-change-warnings is used.
- --change-warnings
- --adjust-warnings
- If --change-section-address or --change-section-lma or
      --change-section-vma is used, and the section pattern does not
      match any sections, issue a warning. This is the default.
- --no-change-warnings
- --no-adjust-warnings
- Do not issue a warning if --change-section-address or
      --adjust-section-lma or --adjust-section-vma is used, even
      if the section pattern does not match any sections.
- --set-section-flags sectionpattern=flags
- Set the flags for any sections matching sectionpattern. The
      flags argument is a comma separated string of flag names. The
      recognized names are alloc, contents, load,
      noload, readonly, code, data, rom,
      share, and debug. You can set the contents flag for a
      section which does not have contents, but it is not meaningful to clear
      the contents flag of a section which does have contents--just
      remove the section instead. Not all flags are meaningful for all object
      file formats.
- --set-section-alignment
    sectionpattern=align
- Set the alignment for any sections matching sectionpattern.
      align specifies the alignment in bytes and must be a power of two,
      i.e. 1, 2, 4, 8....
- --add-section sectionname=filename
- Add a new section named sectionname while copying the file. The
      contents of the new section are taken from the file filename. The
      size of the section will be the size of the file. This option only works
      on file formats which can support sections with arbitrary names. Note - it
      may be necessary to use the --set-section-flags option to set the
      attributes of the newly created section.
- --dump-section sectionname=filename
- Place the contents of section named sectionname into the file
      filename, overwriting any contents that may have been there
      previously. This option is the inverse of --add-section. This
      option is similar to the --only-section option except that it does
      not create a formatted file, it just dumps the contents as raw binary
      data, without applying any relocations. The option can be specified more
      than once.
- --update-section sectionname=filename
- Replace the existing contents of a section named sectionname with
      the contents of file filename. The size of the section will be
      adjusted to the size of the file. The section flags for sectionname
      will be unchanged. For ELF format files the section to segment mapping
      will also remain unchanged, something which is not possible using
      --remove-section followed by --add-section. The option can
      be specified more than once.
    Note - it is possible to use --rename-section and
        --update-section to both update and rename a section from one
        command line. In this case, pass the original section name to
        --update-section, and the original and new section names to
        --rename-section. 
- --add-symbol
    name=[section:]value[,flags]
- Add a new symbol named name while copying the file. This option may
      be specified multiple times. If the section is given, the symbol
      will be associated with and relative to that section, otherwise it will be
      an ABS symbol. Specifying an undefined section will result in a fatal
      error. There is no check for the value, it will be taken as specified.
      Symbol flags can be specified and not all flags will be meaningful for all
      object file formats. By default, the symbol will be global. The special
      flag 'before=othersym' will insert the new symbol in front of the
      specified othersym, otherwise the symbol(s) will be added at the
      end of the symbol table in the order they appear.
- --rename-section
    oldname=newname[,flags]
- Rename a section from oldname to newname, optionally
      changing the section's flags to flags in the process. This has the
      advantage over using a linker script to perform the rename in that the
      output stays as an object file and does not become a linked executable.
    This option is particularly helpful when the input format is
        binary, since this will always create a section called .data. If for
        example, you wanted instead to create a section called .rodata
        containing binary data you could use the following command line to
        achieve it: 
 
          objcopy -I binary -O <output_format> -B <architecture> \
           --rename-section .data=.rodata,alloc,load,readonly,data,contents \
           <input_binary_file> <output_object_file>
    
- --long-section-names {enable,disable,keep}
- Controls the handling of long section names when processing
      "COFF" and
      "PE-COFF" object formats. The default
      behaviour, keep, is to preserve long section names if any are
      present in the input file. The enable and disable options
      forcibly enable or disable the use of long section names in the output
      object; when disable is in effect, any long section names in the
      input object will be truncated. The enable option will only emit
      long section names if any are present in the inputs; this is mostly the
      same as keep, but it is left undefined whether the enable
      option might force the creation of an empty string table in the output
      file.
- --change-leading-char
- Some object file formats use special characters at the start of symbols.
      The most common such character is underscore, which compilers often add
      before every symbol. This option tells objcopy to change the
      leading character of every symbol when it converts between object file
      formats. If the object file formats use the same leading character, this
      option has no effect. Otherwise, it will add a character, or remove a
      character, or change a character, as appropriate.
- --remove-leading-char
- If the first character of a global symbol is a special symbol leading
      character used by the object file format, remove the character. The most
      common symbol leading character is underscore. This option will remove a
      leading underscore from all global symbols. This can be useful if you want
      to link together objects of different file formats with different
      conventions for symbol names. This is different from
      --change-leading-char because it always changes the symbol name
      when appropriate, regardless of the object file format of the output
    file.
- --reverse-bytes=num
- Reverse the bytes in a section with output contents. A section length must
      be evenly divisible by the value given in order for the swap to be able to
      take place. Reversing takes place before the interleaving is performed.
    This option is used typically in generating ROM images for
        problematic target systems. For example, on some target boards, the
        32-bit words fetched from 8-bit ROMs are re-assembled in little-endian
        byte order regardless of the CPU byte order. Depending on the
        programming model, the endianness of the ROM may need to be
      modified. Consider a simple file with a section containing the following
        eight bytes: 12345678. Using --reverse-bytes=2 for the above example, the
        bytes in the output file would be ordered
        21436587. Using --reverse-bytes=4 for the above example, the
        bytes in the output file would be ordered
        43218765. By using --reverse-bytes=2 for the above example,
        followed by --reverse-bytes=4 on the output file, the bytes in
        the second output file would be ordered
        34127856. 
- --srec-len=ival
- Meaningful only for srec output. Set the maximum length of the Srecords
      being produced to ival. This length covers both address, data and
      crc fields.
- --srec-forceS3
- Meaningful only for srec output. Avoid generation of S1/S2 records,
      creating S3-only record format.
- --redefine-sym old=new
- Change the name of a symbol old, to new. This can be useful
      when one is trying link two things together for which you have no source,
      and there are name collisions.
- --redefine-syms=filename
- Apply --redefine-sym to each symbol pair "old
      new" listed in the file filename. filename is
      simply a flat file, with one symbol pair per line. Line comments may be
      introduced by the hash character. This option may be given more than
    once.
- --weaken
- Change all global symbols in the file to be weak. This can be useful when
      building an object which will be linked against other objects using the
      -R option to the linker. This option is only effective when using
      an object file format which supports weak symbols.
- --keep-symbols=filename
- Apply --keep-symbol option to each symbol listed in the file
      filename. filename is simply a flat file, with one symbol
      name per line. Line comments may be introduced by the hash character. This
      option may be given more than once.
- --strip-symbols=filename
- Apply --strip-symbol option to each symbol listed in the file
      filename. filename is simply a flat file, with one symbol
      name per line. Line comments may be introduced by the hash character. This
      option may be given more than once.
- --strip-unneeded-symbols=filename
- Apply --strip-unneeded-symbol option to each symbol listed in the
      file filename. filename is simply a flat file, with one
      symbol name per line. Line comments may be introduced by the hash
      character. This option may be given more than once.
- --keep-global-symbols=filename
- Apply --keep-global-symbol option to each symbol listed in the file
      filename. filename is simply a flat file, with one symbol
      name per line. Line comments may be introduced by the hash character. This
      option may be given more than once.
- --localize-symbols=filename
- Apply --localize-symbol option to each symbol listed in the file
      filename. filename is simply a flat file, with one symbol
      name per line. Line comments may be introduced by the hash character. This
      option may be given more than once.
- --globalize-symbols=filename
- Apply --globalize-symbol option to each symbol listed in the file
      filename. filename is simply a flat file, with one symbol
      name per line. Line comments may be introduced by the hash character. This
      option may be given more than once. Note: this option cannot be used in
      conjunction with the -G or --keep-global-symbol
    options.
- --weaken-symbols=filename
- Apply --weaken-symbol option to each symbol listed in the file
      filename. filename is simply a flat file, with one symbol
      name per line. Line comments may be introduced by the hash character. This
      option may be given more than once.
- --alt-machine-code=index
- If the output architecture has alternate machine codes, use the
      indexth code instead of the default one. This is useful in case a
      machine is assigned an official code and the tool-chain adopts the new
      code, but other applications still depend on the original code being used.
      For ELF based architectures if the index alternative does not exist
      then the value is treated as an absolute number to be stored in the
      e_machine field of the ELF header.
- --writable-text
- Mark the output text as writable. This option isn't meaningful for all
      object file formats.
- --readonly-text
- Make the output text write protected. This option isn't meaningful for all
      object file formats.
- --pure
- Mark the output file as demand paged. This option isn't meaningful for all
      object file formats.
- --impure
- Mark the output file as impure. This option isn't meaningful for all
      object file formats.
- --prefix-symbols=string
- Prefix all symbols in the output file with string.
- --prefix-sections=string
- Prefix all section names in the output file with string.
- --prefix-alloc-sections=string
- Prefix all the names of all allocated sections in the output file with
      string.
- --add-gnu-debuglink=path-to-file
- Creates a .gnu_debuglink section which contains a reference to
      path-to-file and adds it to the output file. Note: the file at
      path-to-file must exist. Part of the process of adding the
      .gnu_debuglink section involves embedding a checksum of the contents of
      the debug info file into the section.
    If the debug info file is built in one location but it is
        going to be installed at a later time into a different location then do
        not use the path to the installed location. The
        --add-gnu-debuglink option will fail because the installed file
        does not exist yet. Instead put the debug info file in the current
        directory and use the --add-gnu-debuglink option without any
        directory components, like this: 
 
         objcopy --add-gnu-debuglink=foo.debug
    At debug time the debugger will attempt to look for the
        separate debug info file in a set of known locations. The exact set of
        these locations varies depending upon the distribution being used, but
        it typically includes: 
i.e., the file pointed to by the --add-gnu-debuglink can be
    the full executable. It does not have to be a file created by the
    --only-keep-debug switch.
Note---this switch is only intended for use on fully linked files.
    It does not make sense to use it on object files where the debugging
    information may be incomplete. Besides the gnu_debuglink feature currently
    only supports the presence of one filename containing debugging information,
    not multiple filenames on a one-per-object-file basis.