Add but not enable correct .init/.fini handling.

lib/csu/mips/Makefile

@@ -1,4 +1,6 @@
-#	$NetBSD: Makefile,v 1.21 1999/03/20 00:32:41 thorpej Exp $
-#	from: @(#)Makefile	8.1 (Berkeley) 6/1/93
+#	$NetBSD: Makefile,v 1.22 2001/07/17 15:20:23 simonb Exp $
+
+#Uncomment the next line to enable the new .init fallthru
+#CPPFLAGS+=	-I- -I${.CURDIR}
 
 .include "${.CURDIR}/../common_elf/Makefile.inc"

lib/csu/mips/dot_init.h

@@ -0,0 +1,80 @@
+/* $NetBSD: dot_init.h,v 1.1 2001/07/17 15:20:23 simonb Exp $ */
+
+/*-
+ * Copyright (c) 2001 Ross Harvey
+ * Copyright (c) 2001 Simon Burge
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
+
+/*
+ * These must be extern to avoid warnings ("declared static but never defined")
+ * However, only the declaration is extern, the actually __asm() defines them
+ * as static.
+ */
+#define	INIT_FALLTHRU_DECL void init_fallthru(void)
+#define	FINI_FALLTHRU_DECL void fini_fallthru(void)
+
+#define	INIT_FALLTHRU()	init_fallthru()
+#define	FINI_FALLTHRU()	fini_fallthru()
+
+#define	ra	"$31"
+
+/*
+ * XXX:
+ *   stack frame is only 8 bytes long (big enough to store the caller's RA).
+ *   Does it need to be 32 bytes to keep gdb happy?
+ */
+#define	MD_SECTION_PROLOGUE(sect, entry_pt)		\
+		__asm (					\
+		".section "#sect",\"ax\",@progbits	\n"\
+		#entry_pt":				\n"\
+		"	subu	$sp,$sp,8		\n"\
+		"	sw	"ra",0($sp)		\n"\
+		"	/* fall thru */			\n"\
+		".previous")
+
+#define	MD_SECTION_EPILOGUE(sect)			\
+		__asm (					\
+		".section "#sect",\"ax\",@progbits	\n"\
+		"	lw	"ra",0($sp)		\n"\
+		"	.set	noreorder		\n"\
+		"	j	"ra"			\n"\
+		"	addu	$sp,$sp,8		\n"\
+		"	.set	reorder			\n"\
+		".previous")
+
+#define	MD_INIT_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.init, init_fallthru)
+#define	MD_FINI_SECTION_PROLOGUE MD_SECTION_PROLOGUE(.fini, fini_fallthru)
+
+#define	MD_INIT_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.init)
+#define	MD_FINI_SECTION_EPILOGUE MD_SECTION_EPILOGUE(.fini)