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authorDave Korn <dave.korn@artimi.com>2009-04-14 09:47:44 +0000
committerDave Korn <dave.korn@artimi.com>2009-04-14 09:47:44 +0000
commit0408dee693ad16f400bc1b0ff04ccd13777e04d5 (patch)
treeca7551e512b6718b84698ea061197562349f9bd1 /binutils
parentc38b10fa101227162ec08b2ecf1cd977c9380c4f (diff)
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bfd/ChangeLog
* 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.
Diffstat (limited to 'binutils')
-rw-r--r--binutils/ChangeLog12
-rw-r--r--binutils/doc/binutils.texi13
-rw-r--r--binutils/objcopy.c45
3 files changed, 70 insertions, 0 deletions
diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index f047b60..d8b0330 100644
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -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
diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index c6cec1d..55d14d0 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -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
diff --git a/binutils/objcopy.c b/binutils/objcopy.c
index 9dcf9b5..02e4d35 100644
--- a/binutils/objcopy.c
+++ b/binutils/objcopy.c
@@ -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;