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200x-xx-xx  Phil Edwards  <phil@codesourcery.com>
	    Richard Sandiford  <richard@codesourcery.com>

	* NEWS: Mention addition of --extract-symbol.
	* doc/binutils.texi: Document it.
	* objcopy.c (extract_symbol): New variable.
	(OPTION_EXTRACT_SYMBOLS): New command_line_switch.
	(copy_options): Add an entry for --extract-symbol.
	(copy_usage): Mention --extract-symbol.
	(copy_object): Set the start address to zero for --extract-symbol.
	Do not copy private BFD data in that case.
	(setup_section): Set the size, LMA and VMA to zero for
	--extract-symbol.  Do not copy private BFD data in that case.
	(copy_section): Do not copy section contents if --extract-symbol
	is passed.
	(copy_main): Set extract_symbol to TRUE if --extract-symbol
	is passed.

ld/testsuite/
	* ld-elf/extract-symbol-1sym.d, ld-elf/extract-symbol-1sec.d,
	* ld-elf/extract-symbol-1.s, ld-elf/extract-symbol-1.ld: New tests.
	* ld-elf/binutils.exp: Run them.
This commit is contained in:
Richard Sandiford
2007-03-01 16:39:42 +00:00
parent 336becc779
commit d3e52d400e
10 changed files with 141 additions and 8 deletions
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16
binutils/doc/binutils.texi
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@@ -996,6 +996,7 @@ objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
[@option{--add-gnu-debuglink=}@var{path-to-file}]
[@option{--keep-file-symbols}]
[@option{--only-keep-debug}]
[@option{--extract-symbol}]
[@option{--writable-text}]
[@option{--readonly-text}]
[@option{--pure}]
@@ -1489,6 +1490,21 @@ currently only supports the presence of one filename containing
debugging information, not multiple filenames on a one-per-object-file
basis.
@item --extract-symbol
Keep the file's section flags and symbols but remove all section data.
Specifically, the option:
@itemize
@item sets the virtual and load addresses of every section to zero;
@item removes the contents of all sections;
@item sets the size of every section to zero; and
@item sets the file's start address to zero.
@end itemize
This option is used to build a @file{.sym} file for a VxWorks kernel.
It can also be a useful way of reducing the size of a @option{--just-symbols}
linker input file.
@item -V
@itemx --version
Show the version number of @command{objcopy}.