OBJCOPY(1) GNU Development Tools OBJCOPY(1)

OBJCOPY(1) GNU Development Tools OBJCOPY(1) #

OBJCOPY(1) GNU Development Tools OBJCOPY(1)

NNAAMMEE #

 objcopy - copy and translate object files

SSYYNNOOPPSSIISS #

 objcopy [--FF _b_f_d_n_a_m_e|----ttaarrggeett==_b_f_d_n_a_m_e]
         [--II _b_f_d_n_a_m_e|----iinnppuutt--ttaarrggeett==_b_f_d_n_a_m_e]
         [--OO _b_f_d_n_a_m_e|----oouuttppuutt--ttaarrggeett==_b_f_d_n_a_m_e]
         [--BB _b_f_d_a_r_c_h|----bbiinnaarryy--aarrcchhiitteeccttuurree==_b_f_d_a_r_c_h]
         [--SS|----ssttrriipp--aallll]
         [--gg|----ssttrriipp--ddeebbuugg]
         [--KK _s_y_m_b_o_l_n_a_m_e|----kkeeeepp--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e]
         [--NN _s_y_m_b_o_l_n_a_m_e|----ssttrriipp--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e]
         [----ssttrriipp--uunnnneeeeddeedd--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e]
         [--GG _s_y_m_b_o_l_n_a_m_e|----kkeeeepp--gglloobbaall--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e]
         [----llooccaalliizzee--hhiiddddeenn]
         [--LL _s_y_m_b_o_l_n_a_m_e|----llooccaalliizzee--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e]
         [----gglloobbaalliizzee--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e]
         [--WW _s_y_m_b_o_l_n_a_m_e|----wweeaakkeenn--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e]
         [--ww|----wwiillddccaarrdd]
         [--xx|----ddiissccaarrdd--aallll]
         [--XX|----ddiissccaarrdd--llooccaallss]
         [--bb _b_y_t_e|----bbyyttee==_b_y_t_e]
         [--ii _i_n_t_e_r_l_e_a_v_e|----iinntteerrlleeaavvee==_i_n_t_e_r_l_e_a_v_e]
         [--jj _s_e_c_t_i_o_n_n_a_m_e|----oonnllyy--sseeccttiioonn==_s_e_c_t_i_o_n_n_a_m_e]
         [--RR _s_e_c_t_i_o_n_n_a_m_e|----rreemmoovvee--sseeccttiioonn==_s_e_c_t_i_o_n_n_a_m_e]
         [--pp|----pprreesseerrvvee--ddaatteess]
         [----ddeebbuuggggiinngg]
         [----ggaapp--ffiillll==_v_a_l]
         [----ppaadd--ttoo==_a_d_d_r_e_s_s]
         [----sseett--ssttaarrtt==_v_a_l]
         [----aaddjjuusstt--ssttaarrtt==_i_n_c_r]
         [----cchhaannggee--aaddddrreesssseess==_i_n_c_r]
         [----cchhaannggee--sseeccttiioonn--aaddddrreessss _s_e_c_t_i_o_n{=,+,-}_v_a_l]
         [----cchhaannggee--sseeccttiioonn--llmmaa _s_e_c_t_i_o_n{=,+,-}_v_a_l]
         [----cchhaannggee--sseeccttiioonn--vvmmaa _s_e_c_t_i_o_n{=,+,-}_v_a_l]
         [----cchhaannggee--wwaarrnniinnggss] [----nnoo--cchhaannggee--wwaarrnniinnggss]
         [----sseett--sseeccttiioonn--ffllaaggss _s_e_c_t_i_o_n=_f_l_a_g_s]
         [----aadddd--sseeccttiioonn _s_e_c_t_i_o_n_n_a_m_e=_f_i_l_e_n_a_m_e]
         [----rreennaammee--sseeccttiioonn _o_l_d_n_a_m_e=_n_e_w_n_a_m_e[,_f_l_a_g_s]]
         [----cchhaannggee--lleeaaddiinngg--cchhaarr] [----rreemmoovvee--lleeaaddiinngg--cchhaarr]
         [----ssrreecc--lleenn==_i_v_a_l] [----ssrreecc--ffoorrcceeSS33]
         [----rreeddeeffiinnee--ssyymm _o_l_d=_n_e_w]
         [----rreeddeeffiinnee--ssyymmss==_f_i_l_e_n_a_m_e]
         [----wweeaakkeenn]
         [----kkeeeepp--ssyymmbboollss==_f_i_l_e_n_a_m_e]
         [----ssttrriipp--ssyymmbboollss==_f_i_l_e_n_a_m_e]
         [----ssttrriipp--uunnnneeeeddeedd--ssyymmbboollss==_f_i_l_e_n_a_m_e]
         [----kkeeeepp--gglloobbaall--ssyymmbboollss==_f_i_l_e_n_a_m_e]
         [----llooccaalliizzee--ssyymmbboollss==_f_i_l_e_n_a_m_e]
         [----gglloobbaalliizzee--ssyymmbboollss==_f_i_l_e_n_a_m_e]
         [----wweeaakkeenn--ssyymmbboollss==_f_i_l_e_n_a_m_e]
         [----aalltt--mmaacchhiinnee--ccooddee==_i_n_d_e_x]
         [----pprreeffiixx--ssyymmbboollss==_s_t_r_i_n_g]
         [----pprreeffiixx--sseeccttiioonnss==_s_t_r_i_n_g]
         [----pprreeffiixx--aalllloocc--sseeccttiioonnss==_s_t_r_i_n_g]
         [----aadddd--ggnnuu--ddeebbuugglliinnkk==_p_a_t_h_-_t_o_-_f_i_l_e]
         [----kkeeeepp--ffiillee--ssyymmbboollss]
         [----oonnllyy--kkeeeepp--ddeebbuugg]
         [----wwrriittaabbllee--tteexxtt]
         [----rreeaaddoonnllyy--tteexxtt]
         [----ppuurree]
         [----iimmppuurree]
         [--vv|----vveerrbboossee]
         [--VV|----vveerrssiioonn]
         [----hheellpp] [----iinnffoo]
         _i_n_f_i_l_e [_o_u_t_f_i_l_e]

DDEESSCCRRIIPPTTIIOONN #

 The GNU oobbjjccooppyy utility copies the contents of an object file to another.
 oobbjjccooppyy uses the GNU BFD Library to read and write the object files.  It
 can write the destination object file in a format different from that of
 the source object file.  The exact behavior of oobbjjccooppyy is controlled by
 command-line options.  Note that oobbjjccooppyy should be able to copy a fully
 linked file between any two formats. However, copying a relocatable
 object file between any two formats may not work as expected.

 oobbjjccooppyy creates temporary files to do its translations and deletes them
 afterward.  oobbjjccooppyy uses BFD to do all its translation work; it has
 access to all the formats described in BFD and thus is able to recognize
 most formats without being told explicitly.

 oobbjjccooppyy can be used to generate S-records by using an output target of
 ssrreecc (e.g., use --OO ssrreecc).

 oobbjjccooppyy can be used to generate a raw binary file by using an output
 target of bbiinnaarryy (e.g., use --OO bbiinnaarryy).  When oobbjjccooppyy generates a raw
 binary file, it will essentially produce a memory dump of the contents of
 the input object file.  All symbols and relocation information will be
 discarded.  The memory dump will start at the load address of the lowest
 section copied into the output file.

 When generating an S-record or a raw binary file, it may be helpful to
 use --SS to remove sections containing debugging information.  In some
 cases --RR will be useful to remove sections which contain information that
 is not needed by the binary file.

 Note---oobbjjccooppyy is not able to change the endianness of its input files.
 If the input format has an endianness (some formats do not), oobbjjccooppyy can
 only copy the inputs into file formats that have the same endianness or
 which have no endianness (e.g., ssrreecc).

OOPPTTIIOONNSS #

 _i_n_f_i_l_e
 _o_u_t_f_i_l_e
     The input and output files, respectively.  If you do not specify
     _o_u_t_f_i_l_e, oobbjjccooppyy creates a temporary file and destructively renames
     the result with the name of _i_n_f_i_l_e.

 --II _b_f_d_n_a_m_e
 ----iinnppuutt--ttaarrggeett==_b_f_d_n_a_m_e
     Consider the source file's object format to be _b_f_d_n_a_m_e, rather than
     attempting to deduce it.

 --OO _b_f_d_n_a_m_e
 ----oouuttppuutt--ttaarrggeett==_b_f_d_n_a_m_e
     Write the output file using the object format _b_f_d_n_a_m_e.

 --FF _b_f_d_n_a_m_e
 ----ttaarrggeett==_b_f_d_n_a_m_e
     Use _b_f_d_n_a_m_e as the object format for both the input and the output
     file; i.e., simply transfer data from source to destination with no
     translation.

 --BB _b_f_d_a_r_c_h
 ----bbiinnaarryy--aarrcchhiitteeccttuurree==_b_f_d_a_r_c_h
     Useful when transforming a raw binary input file into an object file.
     In this case the output architecture can be set to _b_f_d_a_r_c_h. This
     option will be ignored if the input file has a known _b_f_d_a_r_c_h. 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__o_b_j_f_i_l_e_start, _binary__o_b_j_f_i_l_e_end and
     _binary__o_b_j_f_i_l_e_size.  e.g. you can transform a picture file into an
     object file and then access it in your code using these symbols.

 --jj _s_e_c_t_i_o_n_n_a_m_e
 ----oonnllyy--sseeccttiioonn==_s_e_c_t_i_o_n_n_a_m_e
     Copy only the named section 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.

 --RR _s_e_c_t_i_o_n_n_a_m_e
 ----rreemmoovvee--sseeccttiioonn==_s_e_c_t_i_o_n_n_a_m_e
     Remove any section named _s_e_c_t_i_o_n_n_a_m_e from the output file.  This
     option may be given more than once.  Note that using this option
     inappropriately may make the output file unusable.

--SS #

 ----ssttrriipp--aallll
     Do not copy relocation and symbol information from the source file.

 --gg
 ----ssttrriipp--ddeebbuugg
     Do not copy debugging symbols or sections from the source file.

 ----ssttrriipp--uunnnneeeeddeedd
     Strip all symbols that are not needed for relocation processing.

 --KK _s_y_m_b_o_l_n_a_m_e
 ----kkeeeepp--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e
     When stripping symbols, keep symbol _s_y_m_b_o_l_n_a_m_e even if it would
     normally be stripped.  This option may be given more than once.

 --NN _s_y_m_b_o_l_n_a_m_e
 ----ssttrriipp--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e
     Do not copy symbol _s_y_m_b_o_l_n_a_m_e from the source file.  This option may
     be given more than once.

 ----ssttrriipp--uunnnneeeeddeedd--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e
     Do not copy symbol _s_y_m_b_o_l_n_a_m_e from the source file unless it is
     needed by a relocation.  This option may be given more than once.

 --GG _s_y_m_b_o_l_n_a_m_e
 ----kkeeeepp--gglloobbaall--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e
     Keep only symbol _s_y_m_b_o_l_n_a_m_e global.  Make all other symbols local to
     the file, so that they are not visible externally.  This option may
     be given more than once.

 ----llooccaalliizzee--hhiiddddeenn
     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 --LL.

 --LL _s_y_m_b_o_l_n_a_m_e
 ----llooccaalliizzee--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e
     Make symbol _s_y_m_b_o_l_n_a_m_e local to the file, so that it is not visible
     externally.  This option may be given more than once.

 --WW _s_y_m_b_o_l_n_a_m_e
 ----wweeaakkeenn--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e
     Make symbol _s_y_m_b_o_l_n_a_m_e weak. This option may be given more than once.

 ----gglloobbaalliizzee--ssyymmbbooll==_s_y_m_b_o_l_n_a_m_e
     Give symbol _s_y_m_b_o_l_n_a_m_e global scoping so that it is visible outside
     of the file in which it is defined.  This option may be given more
     than once.

 --ww
 ----wwiillddccaarrdd
     Permit regular expressions in _s_y_m_b_o_l_n_a_m_es 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".

 --xx
 ----ddiissccaarrdd--aallll
     Do not copy non-global symbols from the source file.

--XX #

 ----ddiissccaarrdd--llooccaallss
     Do not copy compiler-generated local symbols.  (These usually start
     with LL or ...)

 --bb _b_y_t_e
 ----bbyyttee==_b_y_t_e
     Keep only every _b_y_t_eth byte of the input file (header data is not
     affected).  _b_y_t_e can be in the range from 0 to _i_n_t_e_r_l_e_a_v_e-1, where
     _i_n_t_e_r_l_e_a_v_e is given by the --ii or ----iinntteerrlleeaavvee option, or the default
     of 4.  This option is useful for creating files to program ROM.  It
     is typically used with an "srec" output target.

 --ii _i_n_t_e_r_l_e_a_v_e
 ----iinntteerrlleeaavvee==_i_n_t_e_r_l_e_a_v_e
     Only copy one out of every _i_n_t_e_r_l_e_a_v_e bytes.  Select which byte to
     copy with the --bb or ----bbyyttee option.  The default is 4.  oobbjjccooppyy
     ignores this option if you do not specify either --bb or ----bbyyttee.

 --pp
 ----pprreesseerrvvee--ddaatteess
     Set the access and modification dates of the output file to be the
     same as those of the input file.

 ----ddeebbuuggggiinngg
     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.

 ----ggaapp--ffiillll _v_a_l
     Fill gaps between sections with _v_a_l.  This operation applies to the
     _l_o_a_d _a_d_d_r_e_s_s (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 _v_a_l.

 ----ppaadd--ttoo _a_d_d_r_e_s_s
     Pad the output file up to the load address _a_d_d_r_e_s_s.  This is done by
     increasing the size of the last section.  The extra space is filled
     in with the value specified by ----ggaapp--ffiillll (default zero).

 ----sseett--ssttaarrtt _v_a_l
     Set the start address of the new file to _v_a_l.  Not all object file
     formats support setting the start address.

 ----cchhaannggee--ssttaarrtt _i_n_c_r
 ----aaddjjuusstt--ssttaarrtt _i_n_c_r
     Change the start address by adding _i_n_c_r.  Not all object file formats
     support setting the start address.

 ----cchhaannggee--aaddddrreesssseess _i_n_c_r
 ----aaddjjuusstt--vvmmaa _i_n_c_r
     Change the VMA and LMA addresses of all sections, as well as the
     start address, by adding _i_n_c_r.  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.

 ----cchhaannggee--sseeccttiioonn--aaddddrreessss _s_e_c_t_i_o_n{{==,,++,,--}}_v_a_l
 ----aaddjjuusstt--sseeccttiioonn--vvmmaa _s_e_c_t_i_o_n{{==,,++,,--}}_v_a_l
     Set or change both the VMA address and the LMA address of the named
     _s_e_c_t_i_o_n.  If == is used, the section address is set to _v_a_l.
     Otherwise, _v_a_l is added to or subtracted from the section address.
     See the comments under ----cchhaannggee--aaddddrreesssseess, above. If _s_e_c_t_i_o_n does not
     exist in the input file, a warning will be issued, unless
     ----nnoo--cchhaannggee--wwaarrnniinnggss is used.

 ----cchhaannggee--sseeccttiioonn--llmmaa _s_e_c_t_i_o_n{{==,,++,,--}}_v_a_l
     Set or change the LMA address of the named _s_e_c_t_i_o_n.  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 _v_a_l.
     Otherwise, _v_a_l is added to or subtracted from the section address.
     See the comments under ----cchhaannggee--aaddddrreesssseess, above.  If _s_e_c_t_i_o_n does
     not exist in the input file, a warning will be issued, unless
     ----nnoo--cchhaannggee--wwaarrnniinnggss is used.

 ----cchhaannggee--sseeccttiioonn--vvmmaa _s_e_c_t_i_o_n{{==,,++,,--}}_v_a_l
     Set or change the VMA address of the named _s_e_c_t_i_o_n.  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 _v_a_l.  Otherwise, _v_a_l is added to or subtracted from the section
     address.  See the comments under ----cchhaannggee--aaddddrreesssseess, above.  If
     _s_e_c_t_i_o_n does not exist in the input file, a warning will be issued,
     unless ----nnoo--cchhaannggee--wwaarrnniinnggss is used.

 ----cchhaannggee--wwaarrnniinnggss
 ----aaddjjuusstt--wwaarrnniinnggss
     If ----cchhaannggee--sseeccttiioonn--aaddddrreessss or ----cchhaannggee--sseeccttiioonn--llmmaa or
     ----cchhaannggee--sseeccttiioonn--vvmmaa is used, and the named section does not exist,
     issue a warning.  This is the default.

 ----nnoo--cchhaannggee--wwaarrnniinnggss
 ----nnoo--aaddjjuusstt--wwaarrnniinnggss
     Do not issue a warning if ----cchhaannggee--sseeccttiioonn--aaddddrreessss or
     ----aaddjjuusstt--sseeccttiioonn--llmmaa or ----aaddjjuusstt--sseeccttiioonn--vvmmaa is used, even if the
     named section does not exist.

 ----sseett--sseeccttiioonn--ffllaaggss _s_e_c_t_i_o_n==_f_l_a_g_s
     Set the flags for the named section.  The _f_l_a_g_s argument is a comma
     separated string of flag names.  The recognized names are aalllloocc,
     ccoonntteennttss, llooaadd, nnoollooaadd, rreeaaddoonnllyy, ccooddee, ddaattaa, rroomm, sshhaarree, and ddeebbuugg.
     You can set the ccoonntteennttss flag for a section which does not have
     contents, but it is not meaningful to clear the ccoonntteennttss flag of a
     section which does have contents--just remove the section instead.
     Not all flags are meaningful for all object file formats.

 ----aadddd--sseeccttiioonn _s_e_c_t_i_o_n_n_a_m_e==_f_i_l_e_n_a_m_e
     Add a new section named _s_e_c_t_i_o_n_n_a_m_e while copying the file.  The
     contents of the new section are taken from the file _f_i_l_e_n_a_m_e.  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.

 ----rreennaammee--sseeccttiioonn _o_l_d_n_a_m_e==_n_e_w_n_a_m_e[[,,_f_l_a_g_s]]
     Rename a section from _o_l_d_n_a_m_e to _n_e_w_n_a_m_e, optionally changing the
     section's flags to _f_l_a_g_s in the process.  This has the advantage over
     usng 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>

 ----cchhaannggee--lleeaaddiinngg--cchhaarr
     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 oobbjjccooppyy
     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.

 ----rreemmoovvee--lleeaaddiinngg--cchhaarr
     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
     ----cchhaannggee--lleeaaddiinngg--cchhaarr because it always changes the symbol name when
     appropriate, regardless of the object file format of the output file.

 ----ssrreecc--lleenn==_i_v_a_l
     Meaningful only for srec output.  Set the maximum length of the
     Srecords being produced to _i_v_a_l.  This length covers both address,
     data and crc fields.

 ----ssrreecc--ffoorrcceeSS33
     Meaningful only for srec output.  Avoid generation of S1/S2 records,
     creating S3-only record format.

 ----rreeddeeffiinnee--ssyymm _o_l_d==_n_e_w
     Change the name of a symbol _o_l_d, to _n_e_w.  This can be useful when one
     is trying link two things together for which you have no source, and
     there are name collisions.

 ----rreeddeeffiinnee--ssyymmss==_f_i_l_e_n_a_m_e
     Apply ----rreeddeeffiinnee--ssyymm to each symbol pair "_o_l_d _n_e_w" listed in the file
     _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----wweeaakkeenn
     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 --RR option to the linker.  This option is only effective
     when using an object file format which supports weak symbols.

 ----kkeeeepp--ssyymmbboollss==_f_i_l_e_n_a_m_e
     Apply ----kkeeeepp--ssyymmbbooll option to each symbol listed in the file
     _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----ssttrriipp--ssyymmbboollss==_f_i_l_e_n_a_m_e
     Apply ----ssttrriipp--ssyymmbbooll option to each symbol listed in the file
     _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----ssttrriipp--uunnnneeeeddeedd--ssyymmbboollss==_f_i_l_e_n_a_m_e
     Apply ----ssttrriipp--uunnnneeeeddeedd--ssyymmbbooll option to each symbol listed in the
     file _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----kkeeeepp--gglloobbaall--ssyymmbboollss==_f_i_l_e_n_a_m_e
     Apply ----kkeeeepp--gglloobbaall--ssyymmbbooll option to each symbol listed in the file
     _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----llooccaalliizzee--ssyymmbboollss==_f_i_l_e_n_a_m_e
     Apply ----llooccaalliizzee--ssyymmbbooll option to each symbol listed in the file
     _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----gglloobbaalliizzee--ssyymmbboollss==_f_i_l_e_n_a_m_e
     Apply ----gglloobbaalliizzee--ssyymmbbooll option to each symbol listed in the file
     _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----wweeaakkeenn--ssyymmbboollss==_f_i_l_e_n_a_m_e
     Apply ----wweeaakkeenn--ssyymmbbooll option to each symbol listed in the file
     _f_i_l_e_n_a_m_e.  _f_i_l_e_n_a_m_e 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.

 ----aalltt--mmaacchhiinnee--ccooddee==_i_n_d_e_x
     If the output architecture has alternate machine codes, use the
     _i_n_d_e_xth 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 _i_n_d_e_x 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.

 ----wwrriittaabbllee--tteexxtt
     Mark the output text as writable.  This option isn't meaningful for
     all object file formats.

 ----rreeaaddoonnllyy--tteexxtt
     Make the output text write protected.  This option isn't meaningful
     for all object file formats.

 ----ppuurree
     Mark the output file as demand paged.  This option isn't meaningful
     for all object file formats.

 ----iimmppuurree
     Mark the output file as impure.  This option isn't meaningful for all
     object file formats.

 ----pprreeffiixx--ssyymmbboollss==_s_t_r_i_n_g
     Prefix all symbols in the output file with _s_t_r_i_n_g.

 ----pprreeffiixx--sseeccttiioonnss==_s_t_r_i_n_g
     Prefix all section names in the output file with _s_t_r_i_n_g.

 ----pprreeffiixx--aalllloocc--sseeccttiioonnss==_s_t_r_i_n_g
     Prefix all the names of all allocated sections in the output file
     with _s_t_r_i_n_g.

 ----aadddd--ggnnuu--ddeebbuugglliinnkk==_p_a_t_h_-_t_o_-_f_i_l_e
     Creates a .gnu_debuglink section which contains a reference to _p_a_t_h_-
     _t_o_-_f_i_l_e and adds it to the output file.

 ----kkeeeepp--ffiillee--ssyymmbboollss
     When stripping a file, perhaps with ----ssttrriipp--ddeebbuugg or
     ----ssttrriipp--uunnnneeeeddeedd, retain any symbols specifying source file names,
     which would otherwise get stripped.

 ----oonnllyy--kkeeeepp--ddeebbuugg
     Strip a file, removing contents of any sections that would not be
     stripped by ----ssttrriipp--ddeebbuugg and leaving the debugging sections intact.

     The intention is that this option will be used in conjunction with
     ----aadddd--ggnnuu--ddeebbuugglliinnkk to create a two part executable.  One a stripped
     binary which will occupy less space in RAM and in a distribution and
     the second a debugging information file which is only needed if
     debugging abilities are required.  The suggested procedure to create
     these files is as follows:

     1.<Link the executable as normal.  Assuming that is is called>
         "foo" then...

     1.<Run "objcopy --only-keep-debug foo foo.dbg" to>
         create a file containing the debugging info.

     1.<Run "objcopy --strip-debug foo" to create a>
         stripped executable.

     1.<Run "objcopy --add-gnu-debuglink=foo.dbg foo">
         to add a link to the debugging info into the stripped executable.

     Note - the choice of ".dbg" as an extension for the debug info file
     is arbitrary.  Also the "--only-keep-debug" step is optional.  You
     could instead do this:

     1.<Link the executable as normal.>
     1.<Copy "foo" to  "foo.full">
     1.<Run "objcopy --strip-debug foo">
     1.<Run "objcopy --add-gnu-debuglink=foo.full foo">

     i.e. the file pointed to by the ----aadddd--ggnnuu--ddeebbuugglliinnkk can be the full
     executable.  It does not have to be a file created by the
     ----oonnllyy--kkeeeepp--ddeebbuugg switch.

--VV #

 ----vveerrssiioonn
     Show the version number of oobbjjccooppyy.

 --vv
 ----vveerrbboossee
     Verbose output: list all object files modified.  In the case of
     archives, oobbjjccooppyy --VV lists all members of the archive.

 ----hheellpp
     Show a summary of the options to oobbjjccooppyy.

 ----iinnffoo
     Display a list showing all architectures and object formats
     available.

 @@_f_i_l_e
     Read command-line options from _f_i_l_e.  The options read are inserted
     in place of the original @_f_i_l_e option.  If _f_i_l_e does not exist, or
     cannot be read, then the option will be treated literally, and not
     removed.

     Options in _f_i_l_e are separated by whitespace.  A whitespace character
     may be included in an option by surrounding the entire option in
     either single or double quotes.  Any character (including a
     backslash) may be included by prefixing the character to be included
     with a backslash.  The _f_i_l_e may itself contain additional @_f_i_l_e
     options; any such options will be processed recursively.

SSEEEE AALLSSOO #

 lldd(1), oobbjjdduummpp(1), and the Info entries for _b_i_n_u_t_i_l_s.

CCOOPPYYRRIIGGHHTT #

 Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.

 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.1 or any
 later version published by the Free Software Foundation; with no
 Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
 Texts.  A copy of the license is included in the section entitled "GNU
 Free Documentation License".

binutils-2.17 2024-03-20 OBJCOPY(1)