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* coffgen.c (make_a_section_from_file):  Set the backend long
	section names enable if long section names found on input.
	* coffcode.h:  Extend long section names documentation to match.

binutils/ChangeLog

	* objcopy.c (enum long_section_name_handling):  New enum type.
	(enum command_line_switch):  Add OPTION_LONG_SECTION_NAMES.
	(copy_options[]):  Add entry for --long-section-names option.
	(copy_usage):  Document it.
	(set_long_section_mode):  New subroutine.
	(copy_file):  Call it.
	(copy_main):  Accept OPTION_LONG_SECTION_NAMES and parse arg.
	* doc/binutils.texi:  Update objcopy documentation with details
	of new option.
This commit is contained in:
Dave Korn
2009-04-14 09:47:44 +00:00
parent c38b10fa10
commit 0408dee693
6 changed files with 89 additions and 0 deletions
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12
binutils/ChangeLog
View File

@@ -1,3 +1,15 @@
2009-04-14 Dave Korn <dave.korn.cygwin@gmail.com>
* objcopy.c (enum long_section_name_handling): New enum type.
(enum command_line_switch): Add OPTION_LONG_SECTION_NAMES.
(copy_options[]): Add entry for --long-section-names option.
(copy_usage): Document it.
(set_long_section_mode): New subroutine.
(copy_file): Call it.
(copy_main): Accept OPTION_LONG_SECTION_NAMES and parse arg.
* doc/binutils.texi: Update objcopy documentation with details
of new option.
2009-04-01 Dave Korn <dave.korn.cygwin@gmail.com>
* dlltool.c (set_dll_name_from_def): Accept new second arg that

13
binutils/doc/binutils.texi
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@@ -1001,6 +1001,7 @@ objcopy [@option{-F} @var{bfdname}|@option{--target=}@var{bfdname}]
[@option{--set-section-flags} @var{section}=@var{flags}]
[@option{--add-section} @var{sectionname}=@var{filename}]
[@option{--rename-section} @var{oldname}=@var{newname}[,@var{flags}]]
[@option{--long-section-names} @{enable,disable,keep@}]
[@option{--change-leading-char}] [@option{--remove-leading-char}]
[@option{--reverse-bytes=}@var{num}]
[@option{--srec-len=}@var{ival}] [@option{--srec-forceS3}]
@@ -1338,6 +1339,18 @@ data you could use the following command line to achieve it:
<input_binary_file> <output_object_file>
@end smallexample
@item --long-section-names @{enable,disable,keep@}
Controls the handling of long section names when processing @code{COFF}
and @code{PE-COFF} object formats. The default behaviour, @samp{keep},
is to preserve long section names if any are present in the input file.
The @samp{enable} and @samp{disable} options forcibly enable or disable
the use of long section names in the output object; when @samp{disable}
is in effect, any long section names in the input object will be truncated.
The @samp{enable} option will only emit long section names if any are
present in the inputs; this is mostly the same as @samp{keep}, but it
is left undefined whether the @samp{enable} option might force the
creation of an empty string table in the output file.
@item --change-leading-char
Some object file formats use special characters at the start of
symbols. The most common such character is underscore, which compilers

45
binutils/objcopy.c
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@@ -32,6 +32,8 @@
#include "elf-bfd.h"
#include <sys/stat.h>
#include "libbfd.h"
#include "coff/internal.h"
#include "libcoff.h"
struct is_specified_symbol_predicate_data
{
@@ -216,6 +218,18 @@ static bfd_boolean extract_symbol = FALSE;
of <reverse_bytes> bytes within each output section. */
static int reverse_bytes = 0;
/* For Coff objects, we may want to allow or disallow long section names,
or preserve them where found in the inputs. Debug info relies on them. */
enum long_section_name_handling
{
DISABLE,
ENABLE,
KEEP
};
/* The default long section handling mode is to preserve them.
This is also the only behaviour for 'strip'. */
static enum long_section_name_handling long_section_names = KEEP;
/* 150 isn't special; it's just an arbitrary non-ASCII char value. */
enum command_line_switch
@@ -247,6 +261,7 @@ enum command_line_switch
OPTION_KEEP_SYMBOLS,
OPTION_LOCALIZE_HIDDEN,
OPTION_LOCALIZE_SYMBOLS,
OPTION_LONG_SECTION_NAMES,
OPTION_GLOBALIZE_SYMBOL,
OPTION_GLOBALIZE_SYMBOLS,
OPTION_KEEPGLOBAL_SYMBOLS,
@@ -340,6 +355,7 @@ static struct option copy_options[] =
{"localize-hidden", no_argument, 0, OPTION_LOCALIZE_HIDDEN},
{"localize-symbol", required_argument, 0, 'L'},
{"localize-symbols", required_argument, 0, OPTION_LOCALIZE_SYMBOLS},
{"long-section-names", required_argument, 0, OPTION_LONG_SECTION_NAMES},
{"no-adjust-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"no-change-warnings", no_argument, 0, OPTION_NO_CHANGE_WARNINGS},
{"only-keep-debug", no_argument, 0, OPTION_ONLY_KEEP_DEBUG},
@@ -470,6 +486,8 @@ copy_usage (FILE *stream, int exit_status)
Set section <name>'s properties to <flags>\n\
--add-section <name>=<file> Add section <name> found in <file> to output\n\
--rename-section <old>=<new>[,<flags>] Rename section <old> to <new>\n\
--long-section-names {enable|disable|keep}\n\
Handle long section names in Coff objects.\n\
--change-leading-char Force output format's leading character style\n\
--remove-leading-char Remove leading character from global symbols\n\
--reverse-bytes=<num> Reverse <num> bytes at a time, in output sections with content\n\
@@ -2025,6 +2043,18 @@ copy_unknown_element:
rmdir (dir);
}
static void
set_long_section_mode (bfd *output_bfd, bfd *input_bfd, enum long_section_name_handling style)
{
/* This is only relevant to Coff targets. */
if (bfd_get_flavour (output_bfd) == bfd_target_coff_flavour)
{
if (style == KEEP)
style = bfd_coff_long_section_names (input_bfd) ? ENABLE : DISABLE;
bfd_coff_set_long_section_names (output_bfd, style != DISABLE);
}
}
/* The top-level control. */
static void
@@ -2073,6 +2103,8 @@ copy_file (const char *input_filename, const char *output_filename,
status = 1;
return;
}
/* This is a no-op on non-Coff targets. */
set_long_section_mode (obfd, ibfd, long_section_names);
copy_archive (ibfd, obfd, output_target, force_output_target);
}
@@ -2093,6 +2125,8 @@ copy_file (const char *input_filename, const char *output_filename,
status = 1;
return;
}
/* This is a no-op on non-Coff targets. */
set_long_section_mode (obfd, ibfd, long_section_names);
if (! copy_object (ibfd, obfd))
status = 1;
@@ -3353,6 +3387,17 @@ copy_main (int argc, char *argv[])
add_specific_symbols (optarg, localize_specific_htab);
break;
case OPTION_LONG_SECTION_NAMES:
if (!strcmp ("enable", optarg))
long_section_names = ENABLE;
else if (!strcmp ("disable", optarg))
long_section_names = DISABLE;
else if (!strcmp ("keep", optarg))
long_section_names = KEEP;
else
fatal (_("unknown long section names option '%s'"), optarg);
break;
case OPTION_GLOBALIZE_SYMBOLS:
add_specific_symbols (optarg, globalize_specific_htab);
break;