Call C++ static constructors.

From-SVN: r9194

gcc/config/rs6000/eabi-ctors.c

+/* Stripped down support to run global constructors and destructors on
+   embedded PowerPC systems.
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Contributed by Michael Meissner  (meissner@cygnus.com).
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+/*  Declare a pointer to void function type.  */
+
+typedef void (*func_ptr) (void);
+
+/* Declare the set of symbols use as begin and end markers for the lists
+   of global object constructors and global object destructors.  */
+
+extern func_ptr __CTOR_LIST__[];
+extern func_ptr __CTOR_END__ [];
+extern func_ptr __DTOR_LIST__[];
+extern func_ptr __DTOR_END__ [];
+
+/* Call all global constructors */
+void
+__do_global_ctors (void)
+{
+  func_ptr *ptr = &__CTOR_LIST__[0];
+  func_ptr *end = &__CTOR_END__[0];
+
+  for ( ; ptr != end; ptr++)
+    (*ptr)();
+}
+
+/* Call all global destructors */
+void
+__do_global_dtors (void)
+{
+  func_ptr *ptr = &__DTOR_LIST__[0];
+  func_ptr *end = &__DTOR_END__[0];
+
+  for ( ; ptr != end; ptr++)
+    (*ptr)();
+}
+

gcc/config/rs6000/eabi.asm

@@ -15,6 +15,12 @@
 .Lgot = .-.LCTOC1
 	.long	_GLOBAL_OFFSET_TABLE_		# normal GOT address
 
+.Lgots = .-.LCTOC1
+	.long	_GOT_START_			# start of .got section
+
+.Lgote = .-.LCTOC1
+	.long	_GOT_END_			# end of .got section
+
 .Lgot2s = .-.LCTOC1
 	.long	_GOT2_START_			# -mrelocatable GOT pointers start
 
@@ -22,49 +28,146 @@
 	.long	_GOT2_END_			# -mrelocatable GOT pointers end
 
 	.text
-.Lptr:	.long	.LCTOC1-.Laddr			# PC relative pointer to .got2
+.Lptr:
+	.long	.LCTOC1-.Laddr			# PC relative pointer to .got2
 	.long	0x4000				# traceback table
 
 __eabi:	mflr	0
 	bl	.Laddr				# get current address
-.Laddr:	mflr	12				# real address of .Laddr
+.Laddr:
+	mflr	12				# real address of .Laddr
 	lwz	11,(.Lptr-.Laddr)(12)		# linker generated address of .LCTOC1
 	add	11,11,12			# correct to real pointer
 	lwz	12,.Ltable(11)			# get linker's idea of where .Laddr is
 	subf.	12,12,11			# calculate difference
+	mtlr	0				# restore link register
 	bc	4,2,.Lreloc			# skip if we need to relocate
 
+# Only load up register 2 if there is a .got section
+
+	lwz	3,.Lgots(11)			# start of .got section
+	lwz	4,.Lgote(11)			# end of .got section
+	cmpw	1,3,4				# .got section non-empty?
+	bc	12,6,.Ldone
+
 # Normal program, load up register 2
 
-	mtlr	0				# restore link register
 	lwz	2,.Lgot(11)			# normal GOT address
-	blr
+	b	__do_global_ctors		# do any C++ global contstructors (which returns to caller)
 
 # We need to relocate the .got2 pointers.  Don't load register 2
 
 .Lreloc:
-	stwu	30,-4(1)
-	stwu	31,-4(1)
-	lwz	30,.Lgot2s(11)			# GOT pointers start
-	lwz	31,.Lgot2e(11)			# GOT pointers end
-	add	30,12,30			# adjust pointers
-	add	31,12,31
-
-	cmpw	1,30,31				# any pointers to adjust
+	lwz	3,.Lgot2s(11)			# GOT pointers start
+	lwz	4,.Lgot2e(11)			# GOT pointers end
+	add	3,12,3				# adjust pointers
+	add	4,12,4
+
+	cmpw	1,3,4				# any pointers to adjust
 	bc	12,6,.Ldone
 
-.Lloop:	lwz	11,0(30)			# next pointer
+.Lloop:
+	lwz	11,0(3)				# next pointer
 	add	11,11,12			# adjust
-	stw	11,0(30)
-	addi	30,30,4				# bump to next word
-	cmpw	1,30,31				# more pointers to adjust?
+	stw	11,0(3)
+	addi	3,3,4				# bump to next word
+	cmpw	1,3,4				# more pointers to adjust?
 	bc	4,6,.Lloop
 
 # Done adjusting pointers, return
 
 .Ldone:
-	mtlr	0				# restore link register
-	lwz	31,0(1)
-	lwz	30,4(1)				# restore regs
-	addic	1,1,8				# pop stack
-	blr
+	b	__do_global_ctors		# do any C++ global contstructors (which returns to caller)
+
+# Routines for saving floating point registers, called by the compiler.
+# Called with r11 pointing to the stack header word of the caller of the
+# function, just beyond the end of the floating point save area.
+
+	.globl	_savefpr_14_l
+	.globl	_savefpr_15_l
+	.globl	_savefpr_16_l
+	.globl	_savefpr_17_l
+	.globl	_savefpr_18_l
+	.globl	_savefpr_19_l
+	.globl	_savefpr_20_l
+	.globl	_savefpr_21_l
+	.globl	_savefpr_22_l
+	.globl	_savefpr_23_l
+	.globl	_savefpr_24_l
+	.globl	_savefpr_25_l
+	.globl	_savefpr_26_l
+	.globl	_savefpr_27_l
+	.globl	_savefpr_28_l
+	.globl	_savefpr_29_l
+	.globl	_savefpr_30_l
+	.globl	_savefpr_31_l
+
+		.long	0x00400000	# traceback tag
+_savefpr_14_l:	stfd	14,-144(11)	# save fp registers
+_savefpr_15_l:  stfd	15,-136(11)
+_savefpr_16_l:  stfd	16,-128(11)
+_savefpr_17_l:  stfd	17,-120(11)
+_savefpr_18_l:  stfd	18,-112(11)
+_savefpr_19_l:  stfd	19,-104(11)
+_savefpr_20_l:  stfd	20,-96(11)
+_savefpr_21_l:  stfd	21,-88(11)
+_savefpr_22_l:  stfd	22,-80(11)
+_savefpr_23_l:  stfd	23,-72(11)
+_savefpr_24_l:  stfd	24,-64(11)
+_savefpr_25_l:  stfd	25,-56(11)
+_savefpr_26_l:  stfd	26,-48(11)
+_savefpr_27_l:  stfd	27,-40(11)
+_savefpr_28_l:  stfd	28,-32(11)
+_savefpr_29_l:  stfd	29,-24(11)
+_savefpr_30_l:  stfd	30,-16(11)
+_savefpr_31_l:  stfd	31,-8(11)
+		stw	0,4(11)		# save return address also
+		blr
+
+
+# Routines for restoring floating point registers, called by the compiler.
+# Called with r11 pointing to the stack header word of the caller of the
+# function, just beyond the end of the floating point save area.
+
+	.globl	_restfpr_14_l
+	.globl	_restfpr_15_l
+	.globl	_restfpr_16_l
+	.globl	_restfpr_17_l
+	.globl	_restfpr_18_l
+	.globl	_restfpr_19_l
+	.globl	_restfpr_20_l
+	.globl	_restfpr_21_l
+	.globl	_restfpr_22_l
+	.globl	_restfpr_23_l
+	.globl	_restfpr_24_l
+	.globl	_restfpr_25_l
+	.globl	_restfpr_26_l
+	.globl	_restfpr_27_l
+	.globl	_restfpr_28_l
+	.globl	_restfpr_29_l
+	.globl	_restfpr_30_l
+	.globl	_restfpr_31_l
+
+		.long	0x00600000	# traceback tag
+_restfpr_14_l:	lfd	14,-144(11)	# restore fp registers
+_restfpr_15_l:  lfd	15,-136(11)
+_restfpr_16_l:  lfd	16,-128(11)
+_restfpr_17_l:  lfd	17,-120(11)
+_restfpr_18_l:  lfd	18,-112(11)
+_restfpr_19_l:  lfd	19,-104(11)
+_restfpr_20_l:  lfd	20,-96(11)
+_restfpr_21_l:  lfd	21,-88(11)
+_restfpr_22_l:  lfd	22,-80(11)
+_restfpr_23_l:  lfd	23,-72(11)
+_restfpr_24_l:  lfd	24,-64(11)
+_restfpr_25_l:  lfd	25,-56(11)
+_restfpr_26_l:  lfd	26,-48(11)
+_restfpr_27_l:  lfd	27,-40(11)
+_restfpr_28_l:  lfd	28,-32(11)
+_restfpr_29_l:  lfd	29,-24(11)
+_restfpr_30_l:  lfd	30,-16(11)
+_restfpr_31_l:  lwz	0,4(11)		# caller's caller address
+		lfd	31,-8(11)
+		mtlr	0
+		mr	1,11
+		blr

gcc/config/rs6000/eabi.h

@@ -56,8 +56,20 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #undef TARGET_VERSION
 #define TARGET_VERSION fprintf (stderr, " (PowerPC Embedded)");
 
-/* FIXME: These should actually indicate PowerPC, when there is some
-   standard way of expressing that.  */
 #undef CPP_PREDEFINES
 #define CPP_PREDEFINES \
   "-DPPC -D__embedded__ -Asystem(embedded) -Acpu(powerpc) -Amachine(powerpc)"
+
+/* Don't use startfiles or libraries except for libgcc.a */
+#undef  STARTFILE_SPEC
+#define	STARTFILE_SPEC ""
+
+#undef	LIB_SPEC
+#define	LIB_SPEC ""
+
+#undef	LIBGCC_SPEC
+#define	LIBGCC_SPEC "libgcc.a%s"
+
+#undef	ENDFILE_SPEC
+#define	ENDFILE_SPEC ""
+