--- Libc/Libc-262/pthreads/stack.s
+++ Libc/Libc-763.12/pthreads/stack.s
@@ -1,3 +1,25 @@
+/*
+ * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
 /*
  * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991  
  *              All Rights Reserved 
@@ -25,7 +47,7 @@
 
 .text
 
-#if defined(__ppc__)
+#if defined(__ppc__) || defined(__ppc64__)
 #import	<architecture/ppc/asm_help.h>
 #import	<architecture/ppc/pseudo_inst.h>
 
@@ -63,6 +85,40 @@
 	subl	$0x100,%eax
 	ret
 
+#elif defined(__x86_64__)
+
+#import	<architecture/i386/asm_help.h>
+/*	
+ * void *_sp(void)
+ */
+
+LEAF(__sp,0)
+	movq	%rsp,%rax
+	ret
+
+/*
+ * void *_adjust_sp(void *sp)
+ */
+LEAF(__adjust_sp,0)
+	movq	%rdi,%rax
+	subq	$0x100,%rax
+	ret
+
+#elif defined(__arm__)
+
+#import	<architecture/arm/asm_help.h>
+
+LEAF(__sp,0)
+	mov	r0,sp
+	bx	lr
+
+/*
+ * void *_adjust_sp(void *sp)
+ */
+LEAF(__adjust_sp,0)
+	sub	r0, r0, #0x100
+	bx	lr
+
 #else
 #error sp functions not defined for this architecture
 #endif