src/llvm-project/llvm/docs/CommandGuide/llvm-objcopy.rst - toolchain/rustc - Git at Google

 llvm-objcopy - object copying and editing tool
 ==============================================

 .. program:: llvm-objcopy

 SYNOPSIS
 --------

 :program:`llvm-objcopy` [*options*] *input* [*output*]

 DESCRIPTION
 -----------

 :program:`llvm-objcopy` is a tool to copy and manipulate objects. In basic
 usage, it makes a semantic copy of the input to the output. If any options are
 specified, the output may be modified along the way, e.g. by removing sections.

 If no output file is specified, the input file is modified in-place. If "-" is
 specified for the input file, the input is read from the program's standard
 input stream. If "-" is specified for the output file, the output is written to
 the standard output stream of the program.

 If the input is an archive, any requested operations will be applied to each
 archive member individually.

 The tool is still in active development, but in most scenarios it works as a
 drop-in replacement for GNU's :program:`objcopy`.

 GENERIC AND CROSS-PLATFORM OPTIONS
 ----------------------------------

 The following options are either agnostic of the file format, or apply to
 multiple file formats.

 .. option:: --add-gnu-debuglink <debug-file>

  Add a .gnu_debuglink section for ``<debug-file>`` to the output.

 .. option:: --disable-deterministic-archives, -U

  Use real values for UIDs, GIDs and timestamps when updating archive member
  headers.

 .. option:: --discard-all, -x

  Remove most local symbols from the output. Different file formats may limit
  this to a subset of the local symbols. For example, file and section symbols in
  ELF objects will not be discarded.

 .. option:: --enable-deterministic-archives, -D

  Enable deterministic mode when copying archives, i.e. use 0 for archive member
  header UIDs, GIDs and timestamp fields. On by default.

 .. option:: --help, -h

  Print a summary of command line options.

 .. option:: --only-section <section>, -j

  Remove all sections from the output, except for sections named ``<section>``.
  Can be specified multiple times to keep multiple sections.

 .. option:: --regex

  If specified, symbol and section names specified by other switches are treated
  as extended POSIX regular expression patterns.

 .. option:: --remove-section <section>, -R

  Remove the specified section from the output. Can be specified multiple times
  to remove multiple sections simultaneously.

 .. option:: --strip-all-gnu

  Remove all symbols, debug sections and relocations from the output. This option
  is equivalent to GNU :program:`objcopy`'s ``--strip-all`` switch.

 .. option:: --strip-all, -S

  For ELF objects, remove from the output all symbols and non-alloc sections not
  within segments, except for .gnu.warning sections and the section name table.

  For COFF objects, remove all symbols, debug sections, and relocations from the
  output.

 .. option:: --strip-debug, -g

  Remove all debug sections from the output.

 .. option:: --strip-symbol <symbol>, -N

  Remove all symbols named ``<symbol>`` from the output. Can be specified
  multiple times to remove multiple symbols.

 .. option:: --strip-symbols <filename>

  Remove all symbols whose names appear in the file ``<filename>``, from the
  output. In the file, each line represents a single symbol name, with leading
  and trailing whitespace ignored, as is anything following a '#'. Can be
  specified multiple times to read names from multiple files.

 .. option:: --strip-unneeded-symbol <symbol>

  Remove from the output all symbols named ``<symbol>`` that are local or
  undefined and are not required by any relocation.

 .. option:: --strip-unneeded-symbols <filename>

  Remove all symbols whose names appear in the file ``<filename>``, from the
  output, if they are local or undefined and are not required by any relocation.
  In the file, each line represents a single symbol name, with leading and
  trailing whitespace ignored, as is anything following a '#'. Can be specified
  multiple times to read names from multiple files.

 .. option:: --strip-unneeded

  Remove from the output all local or undefined symbols that are not required by
  relocations.

 .. option:: --version, -V

   Display the version of this program.

 COFF-SPECIFIC OPTIONS
 ---------------------

 The following options are implemented only for COFF objects. If used with other
 objects, :program:`llvm-objcopy` will either emit an error or silently ignore
 them.

 .. option:: --only-keep-debug

  Remove the contents of non-debug sections from the output, but keep the section
  headers.

 ELF-SPECIFIC OPTIONS
 --------------------

 The following options are implemented only for ELF objects. If used with other
 objects, :program:`llvm-objcopy` will either emit an error or silently ignore
 them.

 .. option:: --add-section <section=file>

  Add a section named ``<section>`` with the contents of ``<file>`` to the
  output. The section will be of type `SHT_NOTE`, if the name starts with
  ".note". Otherwise, it will have type `SHT_PROGBITS`. Can be specified multiple
  times to add multiple sections.

 .. option:: --add-symbol <name>=[<section>:]<value>[,<flags>]

  Add a new symbol called ``<name>`` to the output symbol table, in the section
  named ``<section>``, with value ``<value>``. If ``<section>`` is not specified,
  the symbol is added as an absolute symbol. The ``<flags>`` affect the symbol
  properties. Accepted values are:

  - `global` = the symbol will have global binding.
  - `local` = the symbol will have local binding.
  - `weak` = the symbol will have weak binding.
  - `default` = the symbol will have default visibility.
  - `hidden` = the symbol will have hidden visibility.
  - `file` = the symbol will be an `STT_FILE` symbol.
  - `section` = the symbol will be an `STT_SECTION` symbol.
  - `object` = the symbol will be an `STT_OBJECT` symbol.
  - `function` = the symbol will be an `STT_FUNC` symbol.
  - `indirect-function` = the symbol will be an `STT_GNU_IFUNC` symbol.

  Additionally, the following flags are accepted but ignored: `debug`,
  `constructor`, `warning`, `indirect`, `synthetic`, `unique-object`, `before`.

  Can be specified multiple times to add multiple symbols.

 .. option:: --allow-broken-links

  Allow llvm-objcopy to remove sections even if it would leave invalid section
  references. Any invalid sh_link fields will be set to zero.

 .. option:: --binary-architecture <arch>, -B

  Specify the architecture to use, when transforming an architecture-less format
  (e.g. binary) to another format. Valid options are:

  - `aarch64`
  - `arm`
  - `i386`
  - `i386:x86-64`
  - `mips`
  - `powerpc:common64`
  - `riscv:rv32`
  - `riscv:rv64`
  - `sparc`
  - `sparcel`
  - `x86-64`

 .. option:: --build-id-link-dir <dir>

  Set the directory used by :option:`--build-id-link-input` and
  :option:`--build-id-link-output`.

 .. option:: --build-id-link-input <suffix>

  Hard-link the input to ``<dir>/xx/xxx<suffix>``, where ``<dir>`` is the directory
  specified by :option:`--build-id-link-dir`. The path used is derived from the
  hex build ID.

 .. option:: --build-id-link-output <suffix>

  Hard-link the output to ``<dir>/xx/xxx<suffix>``, where ``<dir>`` is the directory
  specified by :option:`--build-id-link-dir`. The path used is derived from the
  hex build ID.

 .. option:: --change-start <incr>, --adjust-start

  Add ``<incr>`` to the program's start address. Can be specified multiple
  times, in which case the values will be applied cumulatively.

 .. option:: --compress-debug-sections [<style>]

  Compress DWARF debug sections in the output, using the specified style.
  Supported styles are `zlib-gnu` and `zlib`. Defaults to `zlib` if no style is
  specified.

 .. option:: --decompress-debug-sections

  Decompress any compressed DWARF debug sections in the output.

 .. option:: --discard-locals, -X

  Remove local symbols starting with ".L" from the output.

 .. option:: --dump-section <section>=<file>

  Dump the contents of section ``<section>`` into the file ``<file>``. Can be
  specified multiple times to dump multiple sections to different files.
  ``<file>`` is unrelated to the input and output files provided to
  :program:`llvm-objcopy` and as such the normal copying and editing
  operations will still be performed. No operations are performed on the sections
  prior to dumping them.

 .. option:: --extract-dwo

  Remove all sections that are not DWARF .dwo sections from the output.

 .. option:: --extract-main-partition

  Extract the main partition from the output.

 .. option:: --extract-partition <name>

  Extract the named partition from the output.

 .. option:: --globalize-symbol <symbol>

  Mark any defined symbols named ``<symbol>`` as global symbols in the output.
  Can be specified multiple times to mark multiple symbols.

 .. option:: --globalize-symbols <filename>

  Read a list of names from the file ``<filename>`` and mark defined symbols with
  those names as global in the output. In the file, each line represents a single
  symbol, with leading and trailing whitespace ignored, as is anything following
  a '#'. Can be specified multiple times to read names from multiple files.

 .. option:: --input-target <format>, -I

  Read the input as the specified format. See `SUPPORTED FORMATS`_ for a list of
  valid ``<format>`` values. If unspecified, :program:`llvm-objcopy` will attempt
  to determine the format automatically.

 .. option:: --keep-file-symbols

  Keep symbols of type `STT_FILE`, even if they would otherwise be stripped.

 .. option:: --keep-global-symbol <symbol>

  Make all symbols local in the output, except for symbols with the name
  ``<symbol>``. Can be specified multiple times to ignore multiple symbols.

 .. option:: --keep-global-symbols <filename>

  Make all symbols local in the output, except for symbols named in the file
  ``<filename>``. In the file, each line represents a single symbol, with leading
  and trailing whitespace ignored, as is anything following a '#'. Can be
  specified multiple times to read names from multiple files.

 .. option:: --keep-section <section>

  When removing sections from the output, do not remove sections named
  ``<section>``. Can be specified multiple times to keep multiple sections.

 .. option:: --keep-symbol <symbol>, -K

  When removing symbols from the output, do not remove symbols named
  ``<symbol>``. Can be specified multiple times to keep multiple symbols.

 .. option:: --keep-symbols <filename>

  When removing symbols from the output do not remove symbols named in the file
  ``<filename>``. In the file, each line represents a single symbol, with leading
  and trailing whitespace ignored, as is anything following a '#'. Can be
  specified multiple times to read names from multiple files.

 .. option:: --localize-hidden

  Make all symbols with hidden or internal visibility local in the output.

 .. option:: --localize-symbol <symbol>, -L

  Mark any defined non-common symbol named ``<symbol>`` as a local symbol in the
  output. Can be specified multiple times to mark multiple symbols as local.

 .. option:: --localize-symbols <filename>

  Read a list of names from the file ``<filename>`` and mark defined non-common
  symbols with those names as local in the output. In the file, each line
  represents a single symbol, with leading and trailing whitespace ignored, as is
  anything following a '#'. Can be specified multiple times to read names from
  multiple files.

 .. option:: --output-target <format>, -O

  Write the output as the specified format. See `SUPPORTED FORMATS`_ for a list
  of valid ``<format>`` values. If unspecified, the output format is assumed to
  be the same as the input file's format.

 .. option:: --prefix-alloc-sections <prefix>

  Add ``<prefix>`` to the front of the names of all allocatable sections in the
  output.

 .. option:: --prefix-symbols <prefix>

  Add ``<prefix>`` to the front of every symbol name in the output.

 .. option:: --preserve-dates, -p

  Preserve access and modification timestamps in the output.

 .. option:: --redefine-sym <old>=<new>

  Rename symbols called ``<old>`` to ``<new>`` in the output. Can be specified
  multiple times to rename multiple symbols.

 .. option:: --redefine-syms <filename>

  Rename symbols in the output as described in the file ``<filename>``. In the
  file, each line represents a single symbol to rename, with the old name and new
  name separated by an equals sign. Leading and trailing whitespace is ignored,
  as is anything following a '#'. Can be specified multiple times to read names
  from multiple files.

 .. option:: --rename-section <old>=<new>[,<flag>,...]

  Rename sections called ``<old>`` to ``<new>`` in the output, and apply any
  specified ``<flag>`` values. See :option:`--set-section-flags` for a list of
  supported flags. Can be specified multiple times to rename multiple sections.

 .. option:: --set-section-flags <section>=<flag>[,<flag>,...]

  Set section properties in the output of section ``<section>`` based on the
  specified ``<flag>`` values. Can be specified multiple times to update multiple
  sections.

  Following is a list of supported flags and their effects:

  - `alloc` = add the `SHF_ALLOC` flag.
  - `load` = if the section has `SHT_NOBITS` type, mark it as a `SHT_PROGBITS`
    section.
  - `readonly` = if this flag is not specified, add the `SHF_WRITE` flag.
  - `code` = add the `SHF_EXECINSTR` flag.
  - `merge` = add the `SHF_MERGE` flag.
  - `strings` = add the `SHF_STRINGS` flag.
  - `contents` = if the section has `SHT_NOBITS` type, mark it as a `SHT_PROGBITS`
    section.

  The following flags are also accepted, but are ignored for GNU compatibility:
  `noload`, `debug`, `data`, `rom`, `share`.

 .. option:: --set-start-addr <addr>

  Set the start address of the output to ``<addr>``. Overrides any previously
  specified :option:`--change-start` or :option:`--adjust-start` options.

 .. option:: --split-dwo <dwo-file>

  Equivalent to running :program:`llvm-objcopy` with :option:`--extract-dwo` and
  ``<dwo-file>`` as the output file and no other options, and then with
  :option:`--strip-dwo` on the input file.

 .. option:: --strip-dwo

  Remove all DWARF .dwo sections from the output.

 .. option:: --strip-non-alloc

  Remove from the output all non-allocatable sections that are not within
  segments.

 .. option:: --strip-sections

  Remove from the output all section headers and all section data not within
  segments. Note that many tools will not be able to use an object without
  section headers.

 .. option:: --target <format>, -F

  Equivalent to :option:`--input-target` and :option:`--output-target` for the
  specified format. See `SUPPORTED FORMATS`_ for a list of valid ``<format>``
  values.

 .. option:: --weaken-symbol <symbol>, -W

  Mark any global symbol named ``<symbol>`` as a weak symbol in the output. Can
  be specified multiple times to mark multiple symbols as weak.

 .. option:: --weaken-symbols <filename>

  Read a list of names from the file ``<filename>`` and mark global symbols with
  those names as weak in the output. In the file, each line represents a single
  symbol, with leading and trailing whitespace ignored, as is anything following
  a '#'. Can be specified multiple times to read names from multiple files.

 .. option:: --weaken

  Mark all defined global symbols as weak in the output.

 SUPPORTED FORMATS
 -----------------

 The following values are currently supported by :program:`llvm-objcopy` for the
 :option:`--input-target`, :option:`--output-target`, and :option:`--target`
 options. For GNU :program:`objcopy` compatibility, the values are all bfdnames.

 - `binary`
 - `ihex`
 - `elf32-i386`
 - `elf32-x86-64`
 - `elf64-x86-64`
 - `elf32-iamcu`
 - `elf32-littlearm`
 - `elf64-aarch64`
 - `elf64-littleaarch64`
 - `elf32-littleriscv`
 - `elf64-littleriscv`
 - `elf32-powerpc`
 - `elf32-powerpcle`
 - `elf64-powerpc`
 - `elf64-powerpcle`
 - `elf32-bigmips`
 - `elf32-ntradbigmips`
 - `elf32-ntradlittlemips`
 - `elf32-tradbigmips`
 - `elf32-tradlittlemips`
 - `elf64-tradbigmips`
 - `elf64-tradlittlemips`
 - `elf32-sparc`
 - `elf32-sparcel`

 Additionally, all targets except `binary` and `ihex` can have `-freebsd` as a
 suffix.

 BINARY INPUT AND OUTPUT
 -----------------------

 If `binary` is used as the value for :option:`--input-target`, the input file
 will be embedded as a data section in an ELF relocatable object, with symbols
 ``_binary_<file_name>_start``, ``_binary_<file_name>_end``, and
 ``_binary_<file_name>_size`` representing the start, end and size of the data,
 where ``<file_name>`` is the path of the input file as specified on the command
 line with non-alphanumeric characters converted to ``_``.

 If `binary` is used as the value for :option:`--output-target`, the output file
 will be a raw binary file, containing the memory image of the input file.
 Symbols and relocation information will be discarded. The image will start at
 the address of the first loadable section in the output.

 EXIT STATUS
 -----------

 :program:`llvm-objcopy` exits with a non-zero exit code if there is an error.
 Otherwise, it exits with code 0.

 BUGS
 ----

 To report bugs, please visit <http://llvm.org/bugs/>.

 There is a known issue with :option:`--input-target` and :option:`--target`
 causing only ``binary`` and ``ihex`` formats to have any effect. Other values
 will be ignored and :program:`llvm-objcopy` will attempt to guess the input
 format.

 SEE ALSO
 --------

 :manpage:`llvm-strip(1)`
	llvm-objcopy - object copying and editing tool
	==============================================

	.. program:: llvm-objcopy

	SYNOPSIS
	--------

	:program:`llvm-objcopy` [options] input [output]

	DESCRIPTION
	-----------

	:program:`llvm-objcopy` is a tool to copy and manipulate objects. In basic
	usage, it makes a semantic copy of the input to the output. If any options are
	specified, the output may be modified along the way, e.g. by removing sections.

	If no output file is specified, the input file is modified in-place. If "-" is
	specified for the input file, the input is read from the program's standard
	input stream. If "-" is specified for the output file, the output is written to
	the standard output stream of the program.

	If the input is an archive, any requested operations will be applied to each
	archive member individually.

	The tool is still in active development, but in most scenarios it works as a
	drop-in replacement for GNU's :program:`objcopy`.

	GENERIC AND CROSS-PLATFORM OPTIONS
	----------------------------------

	The following options are either agnostic of the file format, or apply to
	multiple file formats.

	.. option:: --add-gnu-debuglink <debug-file>

	Add a .gnu_debuglink section for ``<debug-file>`` to the output.

	.. option:: --disable-deterministic-archives, -U

	Use real values for UIDs, GIDs and timestamps when updating archive member
	headers.

	.. option:: --discard-all, -x

	Remove most local symbols from the output. Different file formats may limit
	this to a subset of the local symbols. For example, file and section symbols in
	ELF objects will not be discarded.

	.. option:: --enable-deterministic-archives, -D

	Enable deterministic mode when copying archives, i.e. use 0 for archive member
	header UIDs, GIDs and timestamp fields. On by default.

	.. option:: --help, -h

	Print a summary of command line options.

	.. option:: --only-section <section>, -j

	Remove all sections from the output, except for sections named ``<section>``.
	Can be specified multiple times to keep multiple sections.

	.. option:: --regex

	If specified, symbol and section names specified by other switches are treated
	as extended POSIX regular expression patterns.

	.. option:: --remove-section <section>, -R

	Remove the specified section from the output. Can be specified multiple times
	to remove multiple sections simultaneously.

	.. option:: --strip-all-gnu

	Remove all symbols, debug sections and relocations from the output. This option
	is equivalent to GNU :program:`objcopy`'s ``--strip-all`` switch.

	.. option:: --strip-all, -S

	For ELF objects, remove from the output all symbols and non-alloc sections not
	within segments, except for .gnu.warning sections and the section name table.

	For COFF objects, remove all symbols, debug sections, and relocations from the
	output.

	.. option:: --strip-debug, -g

	Remove all debug sections from the output.

	.. option:: --strip-symbol <symbol>, -N

	Remove all symbols named ``<symbol>`` from the output. Can be specified
	multiple times to remove multiple symbols.

	.. option:: --strip-symbols <filename>

	Remove all symbols whose names appear in the file ``<filename>``, from the
	output. In the file, each line represents a single symbol name, with leading
	and trailing whitespace ignored, as is anything following a '#'. Can be
	specified multiple times to read names from multiple files.

	.. option:: --strip-unneeded-symbol <symbol>

	Remove from the output all symbols named ``<symbol>`` that are local or
	undefined and are not required by any relocation.

	.. option:: --strip-unneeded-symbols <filename>

	Remove all symbols whose names appear in the file ``<filename>``, from the
	output, if they are local or undefined and are not required by any relocation.
	In the file, each line represents a single symbol name, with leading and
	trailing whitespace ignored, as is anything following a '#'. Can be specified
	multiple times to read names from multiple files.

	.. option:: --strip-unneeded

	Remove from the output all local or undefined symbols that are not required by
	relocations.

	.. option:: --version, -V

	Display the version of this program.

	COFF-SPECIFIC OPTIONS
	---------------------

	The following options are implemented only for COFF objects. If used with other
	objects, :program:`llvm-objcopy` will either emit an error or silently ignore
	them.

	.. option:: --only-keep-debug

	Remove the contents of non-debug sections from the output, but keep the section
	headers.

	ELF-SPECIFIC OPTIONS
	--------------------

	The following options are implemented only for ELF objects. If used with other
	objects, :program:`llvm-objcopy` will either emit an error or silently ignore
	them.

	.. option:: --add-section <section=file>

	Add a section named ``<section>`` with the contents of ``<file>`` to the
	output. The section will be of type `SHT_NOTE`, if the name starts with
	".note". Otherwise, it will have type `SHT_PROGBITS`. Can be specified multiple
	times to add multiple sections.

	.. option:: --add-symbol <name>=[<section>:]<value>[,<flags>]

	Add a new symbol called ``<name>`` to the output symbol table, in the section
	named ``<section>``, with value ``<value>``. If ``<section>`` is not specified,
	the symbol is added as an absolute symbol. The ``<flags>`` affect the symbol
	properties. Accepted values are:

	- `global` = the symbol will have global binding.
	- `local` = the symbol will have local binding.
	- `weak` = the symbol will have weak binding.
	- `default` = the symbol will have default visibility.
	- `hidden` = the symbol will have hidden visibility.
	- `file` = the symbol will be an `STT_FILE` symbol.
	- `section` = the symbol will be an `STT_SECTION` symbol.
	- `object` = the symbol will be an `STT_OBJECT` symbol.
	- `function` = the symbol will be an `STT_FUNC` symbol.
	- `indirect-function` = the symbol will be an `STT_GNU_IFUNC` symbol.

	Additionally, the following flags are accepted but ignored: `debug`,
	`constructor`, `warning`, `indirect`, `synthetic`, `unique-object`, `before`.

	Can be specified multiple times to add multiple symbols.

	.. option:: --allow-broken-links

	Allow llvm-objcopy to remove sections even if it would leave invalid section
	references. Any invalid sh_link fields will be set to zero.

	.. option:: --binary-architecture <arch>, -B

	Specify the architecture to use, when transforming an architecture-less format
	(e.g. binary) to another format. Valid options are:

	- `aarch64`
	- `arm`
	- `i386`
	- `i386:x86-64`
	- `mips`
	- `powerpc:common64`
	- `riscv:rv32`
	- `riscv:rv64`
	- `sparc`
	- `sparcel`
	- `x86-64`

	.. option:: --build-id-link-dir <dir>

	Set the directory used by :option:`--build-id-link-input` and
	:option:`--build-id-link-output`.

	.. option:: --build-id-link-input <suffix>

	Hard-link the input to ``<dir>/xx/xxx<suffix>``, where ``<dir>`` is the directory
	specified by :option:`--build-id-link-dir`. The path used is derived from the
	hex build ID.

	.. option:: --build-id-link-output <suffix>

	Hard-link the output to ``<dir>/xx/xxx<suffix>``, where ``<dir>`` is the directory
	specified by :option:`--build-id-link-dir`. The path used is derived from the
	hex build ID.

	.. option:: --change-start <incr>, --adjust-start

	Add ``<incr>`` to the program's start address. Can be specified multiple
	times, in which case the values will be applied cumulatively.

	.. option:: --compress-debug-sections [<style>]

	Compress DWARF debug sections in the output, using the specified style.
	Supported styles are `zlib-gnu` and `zlib`. Defaults to `zlib` if no style is
	specified.

	.. option:: --decompress-debug-sections

	Decompress any compressed DWARF debug sections in the output.

	.. option:: --discard-locals, -X

	Remove local symbols starting with ".L" from the output.

	.. option:: --dump-section <section>=<file>

	Dump the contents of section ``<section>`` into the file ``<file>``. Can be
	specified multiple times to dump multiple sections to different files.
	``<file>`` is unrelated to the input and output files provided to
	:program:`llvm-objcopy` and as such the normal copying and editing
	operations will still be performed. No operations are performed on the sections
	prior to dumping them.

	.. option:: --extract-dwo

	Remove all sections that are not DWARF .dwo sections from the output.

	.. option:: --extract-main-partition

	Extract the main partition from the output.

	.. option:: --extract-partition <name>

	Extract the named partition from the output.

	.. option:: --globalize-symbol <symbol>

	Mark any defined symbols named ``<symbol>`` as global symbols in the output.
	Can be specified multiple times to mark multiple symbols.

	.. option:: --globalize-symbols <filename>

	Read a list of names from the file ``<filename>`` and mark defined symbols with
	those names as global in the output. In the file, each line represents a single
	symbol, with leading and trailing whitespace ignored, as is anything following
	a '#'. Can be specified multiple times to read names from multiple files.

	.. option:: --input-target <format>, -I

	Read the input as the specified format. See `SUPPORTED FORMATS`_ for a list of
	valid ``<format>`` values. If unspecified, :program:`llvm-objcopy` will attempt
	to determine the format automatically.

	.. option:: --keep-file-symbols

	Keep symbols of type `STT_FILE`, even if they would otherwise be stripped.

	.. option:: --keep-global-symbol <symbol>

	Make all symbols local in the output, except for symbols with the name
	``<symbol>``. Can be specified multiple times to ignore multiple symbols.

	.. option:: --keep-global-symbols <filename>

	Make all symbols local in the output, except for symbols named in the file
	``<filename>``. In the file, each line represents a single symbol, with leading
	and trailing whitespace ignored, as is anything following a '#'. Can be
	specified multiple times to read names from multiple files.

	.. option:: --keep-section <section>

	When removing sections from the output, do not remove sections named
	``<section>``. Can be specified multiple times to keep multiple sections.

	.. option:: --keep-symbol <symbol>, -K

	When removing symbols from the output, do not remove symbols named
	``<symbol>``. Can be specified multiple times to keep multiple symbols.

	.. option:: --keep-symbols <filename>

	When removing symbols from the output do not remove symbols named in the file
	``<filename>``. In the file, each line represents a single symbol, with leading
	and trailing whitespace ignored, as is anything following a '#'. Can be
	specified multiple times to read names from multiple files.

	.. option:: --localize-hidden

	Make all symbols with hidden or internal visibility local in the output.

	.. option:: --localize-symbol <symbol>, -L

	Mark any defined non-common symbol named ``<symbol>`` as a local symbol in the
	output. Can be specified multiple times to mark multiple symbols as local.

	.. option:: --localize-symbols <filename>

	Read a list of names from the file ``<filename>`` and mark defined non-common
	symbols with those names as local in the output. In the file, each line
	represents a single symbol, with leading and trailing whitespace ignored, as is
	anything following a '#'. Can be specified multiple times to read names from
	multiple files.

	.. option:: --output-target <format>, -O

	Write the output as the specified format. See `SUPPORTED FORMATS`_ for a list
	of valid ``<format>`` values. If unspecified, the output format is assumed to
	be the same as the input file's format.

	.. option:: --prefix-alloc-sections <prefix>

	Add ``<prefix>`` to the front of the names of all allocatable sections in the
	output.

	.. option:: --prefix-symbols <prefix>

	Add ``<prefix>`` to the front of every symbol name in the output.

	.. option:: --preserve-dates, -p

	Preserve access and modification timestamps in the output.

	.. option:: --redefine-sym <old>=<new>

	Rename symbols called ``<old>`` to ``<new>`` in the output. Can be specified
	multiple times to rename multiple symbols.

	.. option:: --redefine-syms <filename>

	Rename symbols in the output as described in the file ``<filename>``. In the
	file, each line represents a single symbol to rename, with the old name and new
	name separated by an equals sign. Leading and trailing whitespace is ignored,
	as is anything following a '#'. Can be specified multiple times to read names
	from multiple files.

	.. option:: --rename-section <old>=<new>[,<flag>,...]

	Rename sections called ``<old>`` to ``<new>`` in the output, and apply any
	specified ``<flag>`` values. See :option:`--set-section-flags` for a list of
	supported flags. Can be specified multiple times to rename multiple sections.

	.. option:: --set-section-flags <section>=<flag>[,<flag>,...]

	Set section properties in the output of section ``<section>`` based on the
	specified ``<flag>`` values. Can be specified multiple times to update multiple
	sections.

	Following is a list of supported flags and their effects:

	- `alloc` = add the `SHF_ALLOC` flag.
	- `load` = if the section has `SHT_NOBITS` type, mark it as a `SHT_PROGBITS`
	section.
	- `readonly` = if this flag is not specified, add the `SHF_WRITE` flag.
	- `code` = add the `SHF_EXECINSTR` flag.
	- `merge` = add the `SHF_MERGE` flag.
	- `strings` = add the `SHF_STRINGS` flag.
	- `contents` = if the section has `SHT_NOBITS` type, mark it as a `SHT_PROGBITS`
	section.

	The following flags are also accepted, but are ignored for GNU compatibility:
	`noload`, `debug`, `data`, `rom`, `share`.

	.. option:: --set-start-addr <addr>

	Set the start address of the output to ``<addr>``. Overrides any previously
	specified :option:`--change-start` or :option:`--adjust-start` options.

	.. option:: --split-dwo <dwo-file>

	Equivalent to running :program:`llvm-objcopy` with :option:`--extract-dwo` and
	``<dwo-file>`` as the output file and no other options, and then with
	:option:`--strip-dwo` on the input file.

	.. option:: --strip-dwo

	Remove all DWARF .dwo sections from the output.

	.. option:: --strip-non-alloc

	Remove from the output all non-allocatable sections that are not within
	segments.

	.. option:: --strip-sections

	Remove from the output all section headers and all section data not within
	segments. Note that many tools will not be able to use an object without
	section headers.

	.. option:: --target <format>, -F

	Equivalent to :option:`--input-target` and :option:`--output-target` for the
	specified format. See `SUPPORTED FORMATS`_ for a list of valid ``<format>``
	values.

	.. option:: --weaken-symbol <symbol>, -W

	Mark any global symbol named ``<symbol>`` as a weak symbol in the output. Can
	be specified multiple times to mark multiple symbols as weak.

	.. option:: --weaken-symbols <filename>

	Read a list of names from the file ``<filename>`` and mark global symbols with
	those names as weak in the output. In the file, each line represents a single
	symbol, with leading and trailing whitespace ignored, as is anything following
	a '#'. Can be specified multiple times to read names from multiple files.

	.. option:: --weaken

	Mark all defined global symbols as weak in the output.

	SUPPORTED FORMATS
	-----------------

	The following values are currently supported by :program:`llvm-objcopy` for the
	:option:`--input-target`, :option:`--output-target`, and :option:`--target`
	options. For GNU :program:`objcopy` compatibility, the values are all bfdnames.

	- `binary`
	- `ihex`
	- `elf32-i386`
	- `elf32-x86-64`
	- `elf64-x86-64`
	- `elf32-iamcu`
	- `elf32-littlearm`
	- `elf64-aarch64`
	- `elf64-littleaarch64`
	- `elf32-littleriscv`
	- `elf64-littleriscv`
	- `elf32-powerpc`
	- `elf32-powerpcle`
	- `elf64-powerpc`
	- `elf64-powerpcle`
	- `elf32-bigmips`
	- `elf32-ntradbigmips`
	- `elf32-ntradlittlemips`
	- `elf32-tradbigmips`
	- `elf32-tradlittlemips`
	- `elf64-tradbigmips`
	- `elf64-tradlittlemips`
	- `elf32-sparc`
	- `elf32-sparcel`

	Additionally, all targets except `binary` and `ihex` can have `-freebsd` as a
	suffix.

	BINARY INPUT AND OUTPUT
	-----------------------

	If `binary` is used as the value for :option:`--input-target`, the input file
	will be embedded as a data section in an ELF relocatable object, with symbols
	``_binary_<file_name>_start``, ``_binary_<file_name>_end``, and
	``_binary_<file_name>_size`` representing the start, end and size of the data,
	where ``<file_name>`` is the path of the input file as specified on the command
	line with non-alphanumeric characters converted to ``_``.

	If `binary` is used as the value for :option:`--output-target`, the output file
	will be a raw binary file, containing the memory image of the input file.
	Symbols and relocation information will be discarded. The image will start at
	the address of the first loadable section in the output.

	EXIT STATUS
	-----------

	:program:`llvm-objcopy` exits with a non-zero exit code if there is an error.
	Otherwise, it exits with code 0.

	BUGS
	----

	To report bugs, please visit <http://llvm.org/bugs/>.

	There is a known issue with :option:`--input-target` and :option:`--target`
	causing only ``binary`` and ``ihex`` formats to have any effect. Other values
	will be ignored and :program:`llvm-objcopy` will attempt to guess the input
	format.

	SEE ALSO
	--------

	:manpage:`llvm-strip(1)`