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+/* 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