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$Id: elfcopy.1 3642 2018-10-14 14:24:28Z jkoshy $
.Dd August 30, 2017 .Dt ELFCOPY 1 .Os .Sh NAME .Nm elfcopy , .Nm objcopy .Nd copy and translate object files .Sh SYNOPSIS .Nm .Op Fl I Ar objformat | Fl s Ar objformat | Fl -input-target= Ns Ar objformat .Op Fl K Ar symbolname | Fl -keep-symbol= Ns Ar symbolname .Op Fl L Ar symbolname | Fl -localize-symbol= Ns Ar symbolname .Op Fl N Ar symbolname | Fl -strip-symbol= Ns Ar symbolname .Op Fl O Ar objformat | Fl -output-target= Ns Ar objformat .Op Fl R Ar sectionname | Fl -remove-section= Ns Ar sectionname .Op Fl S | Fl -strip-all .Op Fl V | Fl -version .Op Fl W Ar symbolname | Fl -weaken-symbol= Ns Ar symbolname .Op Fl X | Fl -discard-locals .Op Fl d | Fl g | Fl -strip-debug .Op Fl h | Fl -help .Op Fl j Ar sectionname | Fl -only-section= Ns Ar sectionname .Op Fl p | Fl -preserve-dates .Op Fl w | Fl -wildcard .Op Fl x | Fl -discard-all .Op Fl -add-gnu-debuglink Ns = Ns Ar filename .Op Fl -add-section Ar sectionname Ns = Ns Ar filename .Oo .Fl -adjust-section-vma Ar section Ns {+|-|=} Ns Ar val | .Fl -change-section-address Ar section Ns {+|-|=} Ns Ar val .Oc .Oo .Fl -adjust-start Ns = Ns Ar increment | .Fl -change-start Ns = Ns Ar increment .Oc .Oo .Fl -adjust-vma Ns = Ns Ar increment | .Fl -change-addresses Ns = Ns Ar increment .Oc .Op Fl -adjust-warnings | Fl -change-warnings .Op Fl -change-section-lma Ar section Ns {+|-|=} Ns Ar val .Op Fl -change-section-vma Ar section Ns {+|-|=} Ns Ar val .Op Fl -extract-dwo .Op Fl -gap-fill Ns = Ns Ar val .Op Fl -globalize-symbol Ns = Ns ar symbolname .Op Fl -globalize-symbols Ns = Ns Ar filename .Op Fl -localize-hidden .Op Fl -localize-symbols Ns = Ns Ar filename .Op Fl -no-adjust-warnings | Fl -no-change-warnings .Op Fl -only-keep-debug .Op Fl -pad-to Ns = Ns Ar address .Op Fl -prefix-alloc-sections Ns = Ns Ar string .Op Fl -prefix-sections Ns = Ns Ar string .Op Fl -prefix-symbols Ns = Ns Ar string .Op Fl -rename-section Ar oldname Ns = Ns Ar newname Ns Op Ar ,flags .Op Fl -set-section-flags Ar sectionname Ns = Ns Ar flags .Op Fl -set-start Ns = Ns Ar address .Op Fl -srec-forceS3 .Op Fl -srec-len Ns = Ns Ar val .Op Fl -strip-dwo .Op Fl -strip-symbols= Ns Ar filename .Op Fl -strip-unneeded .Ar infile .Op Ar outfile .Sh DESCRIPTION The .Nm utility copies the content of the binary object named by argument .Ar infile to that named by argument .Ar outfile , transforming it according to the command line options specified. If argument .Ar outfile is not specified, .Nm will create a temporary file and will subsequently rename it as .Ar infile .
p The .Nm utility supports the following options: l -tag -width indent t Fl I Ar objformat | Fl s Ar objformat | Fl -input-target= Ns Ar objformat Specify that the input file named by the argument .Ar infile is in the object format specified by the argument .Ar objformat . t Fl K Ar symbolname | Fl -keep-symbol= Ns Ar symbolname Copy the symbol named by argument .Ar symbolname to the output. t Fl L Ar symbolname | Fl -localize-symbol= Ns Ar symbolname Make the symbol named by argument .Ar symbolname local to the output file. t Fl N Ar symbol | Fl -strip-symbol= Ns Ar symbolname Do not copy the symbol named by argument .Ar symbolname to the output. t Fl O Ar objformat | Fl -output-target= Ns Ar objformat Write the output file using the object format specified in argument .Ar objformat . The argument .Ar objformat should be one of the target names recognized by .Xr elftc_bfd_find_target 3 . t Fl R Ar sectionname | Fl -remove-section= Ns Ar sectionname Remove any section with name .Ar sectionname from the output file. t Fl S | Fl -strip-all Do not copy symbol and relocation information to the target file. t Fl V | Fl -version Print a version identifier and exit. t Fl W Ar symbolname | Fl -weaken-symbol= Ns Ar symbolname Mark the symbol named by argument .Ar symbolname as weak in the output. t Fl X | Fl -discard-locals Do not copy compiler generated local symbols to the output. t Fl d | Fl g | Fl -strip-debug Do not copy debugging information to the target file. t Fl h | Fl -help Display a help message and exit. t Fl j Ar sectionname | Fl -only-section= Ns Ar sectionname Copy only the section named by argument .Ar sectionname to the output. t Fl p | Fl -preserve-dates Set the access and modification times of the output file to the same as those of the input. t Fl w | Fl -wildcard Use shell-style patterns to name symbols. The following meta-characters are recognized in patterns: l -tag -width "...." -compact t Li ! If this is the first character of the pattern, invert the sense of the pattern match. t Li * Matches any string of characters in a symbol name. t Li ? Matches zero or one character in a symbol name. t Li [ Mark the start of a character class. t Li \e Remove the special meaning of the next character in the pattern. t Li ] Mark the end of a character class. .El t Fl x | Fl -discard-all Do not copy non-global symbols to the output. t Fl -add-gnu-debuglink Ns = Ns Ar filename Create a .gnu_debuglink section in the output file that references the debug data in .Ar filename . t Fl -add-section Ar sectionname Ns = Ns Ar filename Add a new section to the output file with name .Ar sectionname . The contents of the section are taken from the file named by argument .Ar filename . The size of the section will be the number of bytes in file .Ar filename . t Xo .Fl -adjust-section-vma Ar section Ns {+|-|=} Ns Ar val | .Fl -change-section-address Ar section Ns {+|-|=} Ns Ar val .Xc 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 .Ar section . The argument .Ar val specifies the desired increment, decrement or new value for the address. t Xo .Fl -adjust-start Ns = Ns Ar increment | .Fl -change-start Ns = Ns Ar increment .Xc Increase the entry point address of the output ELF object by the value specified in the argument .Ar increment . t Xo .Fl -adjust-vma Ns = Ns Ar increment | .Fl -change-addresses Ns = Ns Ar increment .Xc Increase the virtual memory address and the load memory address of all sections by the value specified by the argument .Ar increment . t Fl -adjust-warnings | Fl -change-warnings Issue a warning if the section specified by the options .Fl -change-section-address , .Fl -change-section-lma or .Fl -change-section-vma does not exist in the input object. This is the default. t Fl -change-section-lma Ar section Ns {+|-|=} Ns Ar val Change or set the load memory address of the section named by the argument .Ar section . Depending on the operator specified, the value in argument .Ar val will be used as an increment, a decrement or as the new value of the load memory address. t Fl -change-section-vma Ar section Ns {+|-|=} Ns Ar val Change or set the virtual memory address of the section named by the argument .Ar section . Depending on the operator specified, the value in argument .Ar val will be used as an increment, a decrement or as the new value of the virtual memory address. t Fl -extract-dwo Copy only .dwo debug sections to the output file. t Fl -gap-fill Ns = Ns Ar val Fill the gaps between sections with the byte value specified by the argument .Ar val . t Fl -globalize-symbol Ns = Ns Ar symbolname Make the symbol named by argument .Ar symbolname global, so that it is visible outside of the file in which it is defined. t Fl -globalize-symbols Ns = Ns Ar filename Make each symbol listed in the file specified by .Ar filename global. t Fl -localize-hidden Make all hidden symbols local to the output file. This includes symbols with internal visiblity. t Fl -localize-symbols Ns = Ns Ar filename Make each symbol listed in the file specified by .Ar filename local to the output file. t Fl -no-adjust-warnings | Fl -no-change-warnings Do not issue a warning if the section specified by the options .Fl -change-section-address , .Fl -change-section-lma or .Fl -change-section-vma is missing in the input object. t Fl -only-keep-debug Copy only debugging information to the output file. t Fl -pad-to Ns = Ns Ar address Pad the load memory address of the output object to the value specified by the argument .Ar address by increasing the size of the section with the highest load memory address. t Fl -prefix-alloc-sections Ns = Ns Ar string Prefix the section names of all the allocated sections with .Ar string . t Fl -prefix-sections Ns = Ns Ar string Prefix the section names of all the sections with .Ar string . t Fl -prefix-symbols Ns = Ns Ar string Prefix the symbol names of all the symbols with .Ar string . t Fl -rename-section Ar oldname Ns = Ns Ar newname Ns Op Ar ,flags Rename the section named by argument .Ar oldname to .Ar newname , optionally changing the sections flags to that specified by argument .Ar flags . Allowed values for the argument .Ar flags are as for option .Fl -set-section-flags below. t Fl -set-section-flags Ar sectionname Ns = Ns Ar flags Set the flags for the section named by argument .Ar sectionname to those specified by argument .Ar flags . Argument .Ar flags is a comma separated list of the following flag names: l -tag -width "readonly" -compact t alloc The section occupies space in the output file. t code The section contains machine instructions. t contents This flag is accepted but is ignored. t data The section contains writeable data. t debug The section holds debugging information. t load The section is loadable. t noload The section should not be loaded into memory. t readonly The section is not writable. t rom The section contains ROM'able contents. t share This flag is accepted but is ignored. .El t Fl -set-start Ns = Ns Ar address Set the start address of the output ELF object to the value specified by the argument .Ar address . t Fl -srec-forceS3 Only generate S-records of type .Dq S3 . This option is only meaningful when the output target is set to .Dq srec . t Fl -srec-len Ns = Ns Ar val Set the maximum length of an S-record line to .Ar val . This option is only meaningful when the output target is set to .Dq srec . t Fl -strip-dwo Do not copy .dwo debug sections to the output file. t Fl -strip-symbols= Ns Ar filename Do not copy any of the symbols specified by .Ar filename to the output. t Fl -strip-unneeded Do not copy symbols that are not needed for relocation processing. .El .Sh DIAGNOSTICS .Ex -std .Sh SEE ALSO .Xr ar 1 , .Xr ld 1 , .Xr mcs 1 , .Xr strip 1 , .Xr elf 3 , .Xr elftc_bfd_find_target 3 , .Xr ar 5 , .Xr elf 5 .Sh COMPATIBILITY The .Nm utility is expected to be option compatible with GNU .Nm objcopy . .Sh HISTORY .Nm has been implemented by .An Kai Wang Aq Mt kaiwang27@users.sourceforge.net .