From: David McCullough <davidm@snapgear.com>
Date: Thu, 7 May 2009 06:14:27 +0000 (+0000)
Subject: GCC properly provides CTOR/DTOR END/LIST symbols already via the normal
X-Git-Url: https://git.wh0rd.org/?a=commitdiff_plain;h=4cf2544bde406fc1c7e3be6f92c972de02d6fef4;p=elf2flt.git

GCC properly provides CTOR/DTOR END/LIST symbols already via the normal
crtbegin and crtend objects.  Since it's been doing this for a while, add
a configure option to control the manual list found in the elf2flt linker
script and default it to off now.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/Makefile.in b/Makefile.in
index 5f9e17d..1b192c4 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -48,7 +48,7 @@ PROG_ELF2FLT = elf2flt$(EXEEXT)
 PROG_FLTHDR = flthdr$(EXEEXT)
 PROGS = $(PROG_ELF2FLT) $(PROG_FLTHDR)
 
-all: $(PROGS)
+all: $(PROGS) ld-elf2flt
 
 $(PROG_ELF2FLT): $(srcdir)/elf2flt.c compress.o $(srcdir)/stubs.c
 	$(CC) $(CCFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
@@ -56,6 +56,9 @@ $(PROG_ELF2FLT): $(srcdir)/elf2flt.c compress.o $(srcdir)/stubs.c
 $(PROG_FLTHDR): $(srcdir)/flthdr.c compress.o
 	$(CC) $(CCFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
 
+ld-elf2flt: $(srcdir)/ld-elf2flt.in
+	./config.status $@
+
 Makefile: $(srcdir)/Makefile.in
 	./config.status $@
 
diff --git a/configure.in b/configure.in
index c3b71ed..e18e41c 100644
--- a/configure.in
+++ b/configure.in
@@ -55,6 +55,12 @@ AC_ARG_ENABLE(emit_relocs,
 	[ emit_relocs=yes ]
 )
 
+AC_ARG_ENABLE(emit_ctor_dtor,
+	AS_HELP_STRING([--enable-emit-ctor-dtor], [manually create ctor/dtor list]),
+	[ emit_ctor_dtor=$enableval ],
+	[ emit_ctor_dtor=no ]
+)
+
 AC_CANONICAL_HOST
 AC_CANONICAL_TARGET
 
@@ -173,6 +179,7 @@ AC_SUBST(zlib_include_dir)
 AC_SUBST(binutils_ldscript_dir)
 AC_SUBST(got_check)
 AC_SUBST(emit_relocs)
+AC_SUBST(emit_ctor_dtor)
 AC_SUBST(SYMBOL_PREFIX)
 
 AC_OUTPUT(Makefile ld-elf2flt elf2flt.ld)
diff --git a/elf2flt.ld.in b/elf2flt.ld.in
index f76eadf..8a4b36b 100644
--- a/elf2flt.ld.in
+++ b/elf2flt.ld.in
@@ -87,8 +87,8 @@ R_RODAT		*(.gnu.linkonce.r*)
 		PROVIDE(@SYMBOL_PREFIX@_SDA2_BASE_ = @SYMBOL_PREFIX@_ssro + (@SYMBOL_PREFIX@_ssro_size / 2));
 
 		. = ALIGN(4) ;
-		@SYMBOL_PREFIX@__CTOR_LIST__ = .;
-		LONG((@SYMBOL_PREFIX@__CTOR_END__ - @SYMBOL_PREFIX@__CTOR_LIST__) / 4 - 2)
+TOR:		@SYMBOL_PREFIX@__CTOR_LIST__ = .;
+TOR:		LONG((@SYMBOL_PREFIX@__CTOR_END__ - @SYMBOL_PREFIX@__CTOR_LIST__) / 4 - 2)
 SINGLE_LINK:	/* gcc uses crtbegin.o to find the start of
 SINGLE_LINK:	   the constructors, so we make sure it is
 SINGLE_LINK:	   first.  Because this is a wildcard, it
@@ -106,16 +106,16 @@ SINGLE_LINK:	   end of ctors marker and it must be last */
 SINGLE_LINK:	KEEP (*(EXCLUDE_FILE (*crtend*.o ) .ctors))
 SINGLE_LINK:	KEEP (*(SORT(.ctors.*)))
 		KEEP (*(.ctors))
-		LONG(0)
-		@SYMBOL_PREFIX@__CTOR_END__ = .;
-		@SYMBOL_PREFIX@__DTOR_LIST__ = .;
-		LONG((@SYMBOL_PREFIX@__DTOR_END__ - @SYMBOL_PREFIX@__DTOR_LIST__) / 4 - 2)
+TOR:		LONG(0)
+TOR:		@SYMBOL_PREFIX@__CTOR_END__ = .;
+TOR:		@SYMBOL_PREFIX@__DTOR_LIST__ = .;
+TOR:		LONG((@SYMBOL_PREFIX@__DTOR_END__ - @SYMBOL_PREFIX@__DTOR_LIST__) / 4 - 2)
 SINGLE_LINK:	KEEP (*crtbegin*.o(.dtors))
 SINGLE_LINK:	KEEP (*(EXCLUDE_FILE (*crtend*.o ) .dtors))
 SINGLE_LINK:	KEEP (*(SORT(.dtors.*)))
 		KEEP (*(.dtors))
-		LONG(0)
-		@SYMBOL_PREFIX@__DTOR_END__ = .;
+TOR:		LONG(0)
+TOR:		@SYMBOL_PREFIX@__DTOR_END__ = .;
 
 		PROVIDE (@SYMBOL_PREFIX@__preinit_array_start = .);
 		KEEP (*(.preinit_array))
diff --git a/ld-elf2flt.in b/ld-elf2flt.in
index f3ad80b..32eb7e0 100644
--- a/ld-elf2flt.in
+++ b/ld-elf2flt.in
@@ -152,6 +152,12 @@ then
 		else
 			SEDOP="$SEDOP -e /^SINGLE_LINK:/d"
 		fi
+		if [ "@emit_ctor_dtor@" = "yes" ]
+		then
+			SEDOP="$SEDOP -e s/^TOR://"
+		else
+			SEDOP="$SEDOP -e /^TOR:/d"
+		fi
 		
 		# provide a default linker script, we usually need one
 		[ -z "$LDSCRIPT" ] && LDSCRIPT="${LDSCRIPTPATH}/elf2flt.ld"