--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/rs6000/tramp.asm	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,107 @@
+/*  Special support for trampolines
+ *
+ *   Copyright (C) 1996, 1997, 2000, 2007, 2008, 2009 Free Software Foundation, Inc.
+ *   Written By Michael Meissner
+ * 
+ * This file 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 3, or (at your option) any
+ * later version.
+ * 
+ * This file 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.
+ * 
+ * Under Section 7 of GPL version 3, you are granted additional
+ * permissions described in the GCC Runtime Library Exception, version
+ * 3.1, as published by the Free Software Foundation.
+ *
+ * You should have received a copy of the GNU General Public License and
+ * a copy of the GCC Runtime Library Exception along with this program;
+ * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */ 
+
+/* Set up trampolines.  */
+
+	.section ".text"
+#include "ppc-asm.h"
+#include "config.h"
+
+#ifndef __powerpc64__
+	.type	trampoline_initial,@object
+	.align	2
+trampoline_initial:
+	mflr	r0
+	bcl	20,31,1f
+.Lfunc = .-trampoline_initial
+	.long	0			/* will be replaced with function address */
+.Lchain = .-trampoline_initial
+	.long	0			/* will be replaced with static chain */
+1:	mflr	r11
+	mtlr	r0
+	lwz	r0,0(r11)		/* function address */
+	lwz	r11,4(r11)		/* static chain */
+	mtctr	r0
+	bctr
+
+trampoline_size = .-trampoline_initial
+	.size	trampoline_initial,trampoline_size
+
+
+/* R3 = stack address to store trampoline */
+/* R4 = length of trampoline area */
+/* R5 = function address */
+/* R6 = static chain */
+
+FUNC_START(__trampoline_setup)
+	mflr	r0		/* save return address */
+        bcl	20,31,.LCF0	/* load up __trampoline_initial into r7 */
+.LCF0:
+        mflr	r11
+        addi	r7,r11,trampoline_initial-4-.LCF0 /* trampoline address -4 */
+
+	li	r8,trampoline_size	/* verify that the trampoline is big enough */
+	cmpw	cr1,r8,r4
+	srwi	r4,r4,2		/* # words to move */
+	addi	r9,r3,-4	/* adjust pointer for lwzu */
+	mtctr	r4
+	blt	cr1,.Labort
+
+	mtlr	r0
+
+	/* Copy the instructions to the stack */
+.Lmove:
+	lwzu	r10,4(r7)
+	stwu	r10,4(r9)
+	bdnz	.Lmove
+
+	/* Store correct function and static chain */
+	stw	r5,.Lfunc(r3)
+	stw	r6,.Lchain(r3)
+
+	/* Now flush both caches */
+	mtctr	r4
+.Lcache:
+	icbi	0,r3
+	dcbf	0,r3
+	addi	r3,r3,4
+	bdnz	.Lcache
+
+	/* Finally synchronize things & return */
+	sync
+	isync
+	blr
+
+.Labort:
+#if (defined __PIC__ || defined __pic__) && defined HAVE_AS_REL16
+	bcl	20,31,1f
+1:	mflr	r30
+	addis	r30,r30,_GLOBAL_OFFSET_TABLE_-1b@ha
+	addi	r30,r30,_GLOBAL_OFFSET_TABLE_-1b@l
+#endif
+	bl	JUMP_TARGET(abort)
+FUNC_END(__trampoline_setup)
+
+#endif