NAME

objcopy — copy and translate object files

SYNOPSIS

DESCRIPTION

The objcopy utility copies the content of the binary object named by argument infile to that named by argument outfile, transforming it according to the command line options specified. If argument outfile is not specified, objcopy will create a temporary file and will subsequently rename it as infile.

The objcopy utility supports the following options:

-I objformat | -s objformat | --input-target=objformat

Specify that the input file named by the argument infile is in the object format specified by the argument objformat.

-K symbolname | --keep-symbol=symbolname

Copy the symbol named by argument symbolname to the output.

-L symbolname | --localize-symbol=symbolname

Make the symbol named by argument symbolname local to the output file.

-N symbol | --strip-symbol=symbolname

Do not copy the symbol named by argument symbolname to the output.

-O objformat | --output-target=objformat

Write the output file using the object format specified in argument objformat. The argument objformat should be one of the target names recognized by elftc_bfd_find_target(3).

-R sectionname | --remove-section=sectionname

Remove any section with name sectionname from the output file.

-S | --strip-all

Do not copy symbol and relocation information to the target file.

-V | --version

Print a version identifier and exit.

-W symbolname | --weaken-symbol=symbolname

Mark the symbol named by argument symbolname as weak in the output.

-X | --discard-locals

Do not copy compiler generated local symbols to the output.

-d | -g | --strip-debug

Do not copy debugging information to the target file.

-h | --help

Display a help message and exit.

-j sectionname | --only-section=sectionname

Copy only the section named by argument sectionname to the output.

-p | --preserve-dates

Set the access and modification times of the output file to the same as those of the input.

-w | --wildcard

Use shell-style patterns to name symbols. The following meta-characters are recognized in patterns:

!

If this is the first character of the pattern, invert the sense of the pattern match.

*

Matches any string of characters in a symbol name.

?

Matches zero or one character in a symbol name.

[

Mark the start of a character class.

\

Remove the special meaning of the next character in the pattern.

]

Mark the end of a character class.

-x | --discard-all

Do not copy non-global symbols to the output.

--add-gnu-debuglink=filename

Create a .gnu_debuglink section in the output file that references the debug data in filename.

--add-section sectionname=filename

Add a new section to the output file with name sectionname. The contents of the section are taken from the file named by argument filename. The size of the section will be the number of bytes in file filename.

--adjust-section-vma section{+|-|=}val | --change-section-address section{+|-|=}val

Depending on the operator specified, increase, decrease or set both the virtual memory address and the load memory address of the section named by the argument section. The argument val specifies the desired increment, decrement or new value for the address.

--adjust-start=increment | --change-start=increment

Increase the entry point address of the output ELF object by the value specified in the argument increment.

--adjust-vma=increment | --change-addresses=increment

Increase the virtual memory address and the load memory address of all sections by the value specified by the argument increment.

--adjust-warnings | --change-warnings

Issue a warning if the section specified by the options --change-section-address, --change-section-lma or --change-section-vma does not exist in the input object. This is the default.

--change-section-lma section{+|-|=}val

Change or set the load memory address of the section named by the argument section. Depending on the operator specified, the value in argument val will be used as an increment, a decrement or as the new value of the load memory address.

--change-section-vma section{+|-|=}val

Change or set the virtual memory address of the section named by the argument section. Depending on the operator specified, the value in argument val will be used as an increment, a decrement or as the new value of the virtual memory address.

--extract-dwo

Copy only .dwo debug sections to the output file.

--gap-fill=val

Fill the gaps between sections with the byte value specified by the argument val.

--globalize-symbol=symbolname

Make the symbol named by argument symbolname global, so that it is visible outside of the file in which it is defined.

--globalize-symbols=filename

Make each symbol listed in the file specified by filename global.

--localize-hidden

Make all hidden symbols local to the output file. This includes symbols with internal visiblity.

--localize-symbols=filename

Make each symbol listed in the file specified by filename local to the output file.

--no-adjust-warnings | --no-change-warnings

Do not issue a warning if the section specified by the options --change-section-address, --change-section-lma or --change-section-vma is missing in the input object.

--only-keep-debug

Copy only debugging information to the output file.

--pad-to=address

Pad the load memory address of the output object to the value specified by the argument address by increasing the size of the section with the highest load memory address.

--prefix-alloc-sections=string

Prefix the section names of all the allocated sections with string.

--prefix-sections=string

Prefix the section names of all the sections with string.

--prefix-symbols=string

Prefix the symbol names of all the symbols with string.

--rename-section oldname=newname[,flags]

Rename the section named by argument oldname to newname, optionally changing the sections flags to that specified by argument flags. Allowed values for the argument flags are as for option --set-section-flags below.

--set-section-flags sectionname=flags

Set the flags for the section named by argument sectionname to those specified by argument flags. Argument flags is a comma separated list of the following flag names:

alloc

The section occupies space in the output file.

code

The section contains machine instructions.

contents

This flag is accepted but is ignored.

data

The section contains writeable data.

debug

The section holds debugging information.

load

The section is loadable.

noload

The section should not be loaded into memory.

readonly

The section is not writable.

rom

The section contains ROM'able contents.

share

This flag is accepted but is ignored.

--set-start=address

Set the start address of the output ELF object to the value specified by the argument address.

--srec-forceS3

Only generate S-records of type “S3”. This option is only meaningful when the output target is set to “srec”.

--srec-len=val

Set the maximum length of an S-record line to val. This option is only meaningful when the output target is set to “srec”.

--strip-dwo

Do not copy .dwo debug sections to the output file.

--strip-symbols=filename

Do not copy any of the symbols specified by filename to the output.

--strip-unneeded

Do not copy symbols that are not needed for relocation processing.

DIAGNOSTICS

The objcopy utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

ar(1), ld(1), mcs(1), strip(1), elf(3), elftc_bfd_find_target(3), ar(5), elf(5)

COMPATIBILITY

The objcopy utility is expected to be option compatible with GNU objcopy.

HISTORY

objcopy has been implemented by Kai Wang <kaiwang27@users.sourceforge.net>.