--- name: "i386-unknown-cygwin32-objcopy" section: "1" platform: "linux" package: "win32binutils" version: "2.6.cygnus.960412-1" release: "Debian 1.2 (Rex)" platforms: ["linux"] url: "https://new.carta.tech/i386-unknown-cygwin32-objcopy" --- # i386-unknown-cygwin32-objcopy(1) copy and translate object files ## NAME objcopy - copy and translate object files ## SYNOPSIS - **objcopy** \[**-F *bfdname* \| --target=*bfdname***\] \[**-I *bfdname* \| --input-target=*bfdname***\] \[**-O *bfdname* \| --output-target=*bfdname***\] \[**-R *sectionname* \| --remove-section=*sectionname***\] \[**-S \| --strip-all**\] \[**-g \| --strip-debug**\] \[**--strip-unneeded**\] \[**-K *symbolname* \| --keep-symbol=*symbolname***\] \[**-N *symbolname* \| --strip-symbol=*symbolname***\] \[**-x \| --discard-all**\] \[**-X \| --discard-locals**\] \[**-b *byte* \| --byte=*byte***\] \[**-i *interleave* \| --interleave=*interleave***\] \[**--debugging**\] \[**--gap-fill=*val***\] \[**--pad-to=*address***\] \[**--set-start=*val***\] \[**--adjust-start=*incr***\] \[**--adjust-vma=*incr***\] \[**--adjust-section-vma=*section{=,+,-}val***\] \[**--adjust-warnings**\] \[**--no-adjust-warnings**\] \[**--set-section-flags=*section=flags***\] \[**--add-section=*sectionname=filename***\] \[**--remove-leading-char**\] \[**-v \| --verbose**\] \[**-V \| --version**\] \[**--help**\] **infile** \[**outfile**\] ## DESCRIPTION The GNU **objcopy** utility copies the contents of an object file to another. **objcopy** 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 **objcopy** is controlled by command-line options. **objcopy** creates temporary files to do its translations and deletes them afterward. **objcopy** uses BFD to do all its translation work; it knows about all the formats BFD knows about, and thus is able to recognize most formats without being told explicitly. **objcopy** can be used to generate S-records by using an output target of **srec** (e.g., use **-O srec).** **objcopy** can be used to generate a raw binary file by using an output target of **binary** (e.g., use **-O binary).** When **objcopy** 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 virtual 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 **-S** to remove sections containing debugging information. In some cases **-R** will be useful to remove sections which contain information which is not needed by the binary file. *infile* and *outfile* are the source and output files respectively. If you do not specify *outfile*, **objcopy** creates a temporary file and destructively renames the result with the name of the input file. ## OPTIONS - **-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. - **-R *sectionname*, --remove-section=*sectionname*** Remove the named section from the file. This option may be given more than once. Note that using this option inappropriately may make the output file unusable. - **-S, --strip-all** Do not copy relocation and symbol information from the source file. - **-g, --strip-debug** Do not copy debugging symbols from the source file. - **--strip-unneeded** Strip all symbols that are not needed for relocation processing. - **-K *symbolname*, --keep-symbol=*symbolname*** Copy only symbol *symbolname* from the source file. 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, and may be combined with strip options other than **-K**. - **-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*** Keep only every *byte*th byte of the input file (header data is not affected). *byte* can be in the range from 0 to the interleave-1. This option is useful for creating files to program ROMs. It is typically used with an srec output target. - **-i *interleave*, --interleave=*interleave*** Only copy one out of every *interleave* bytes. Which one to copy is selected by the **-b** or **--byte** option. The default is 4. The interleave is ignored if neither **-b** nor **--byte** is given. - **--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 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 virtual 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. - **--adjust-start=*incr*** Adjust the start address by adding *incr*. Not all object file formats support setting the start address. - **--adjust-vma=*incr*** Adjust the address 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. - **--adjust-section-vma=*section{=,+,-}val*** Set or adjust the address of the named *section*. 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 **--adjust-vma**, above. If *section* does not exist in the input file, a warning will be issued, unless **--no-adjust-warnings** is used. - **--adjust-warnings** If **--adjust-section-vma** is used, and the named section does not exist, issue a warning. This is the default. - **--no-adjust-warnings** Do not issue a warning if **--adjust-section-vma** is used, even if the named section does not exist. - **--set-section-flags=*section=flags*** Set the flags for the named section. The *flags* argument is a comma separated string of flag names. The recognized names are *alloc*, *load*, *readonly*, *code*, *data*, and *rom*. Not all flags are meaningful for all object file formats. - **--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. - **--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. - **-v, --verbose** Verbose output: list all object files modified. In the case of archives, "**objcopy -V**" lists all members of the archive. - **-V, --version** Show the version number of **objcopy** and exit. - **--help** Show a summary of the options to **objcopy** and exit. ## SEE ALSO \`**binutils**' entry in **info** ; *The GNU Binary Utilities* , Roland H. Pesch (June 1993). ## COPYING Copyright (c) 1993, 94, 95, 1996 Free Software Foundation, Inc. Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Permission is granted to copy and distribute translations of this manual into another language, under the above conditions for modified versions, except that this permission notice may be included in translations approved by the Free Software Foundation instead of in the original English.