--- /dev/null
+++ Libc/Libc-262.3.2/ppc/sys/vfork.s
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * 
+ * 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 (c) 1998 Apple Computer, Inc.  All rights reserved.
+ *
+ *	File:	libc/ppc/sys/vfork.s
+ *
+ * HISTORY
+ * 23-Jun-1998	Umesh Vaishampayan (umeshv@apple.com)
+ *	Created from fork.s
+ *
+ */
+#if 0
+#import <sys/syscall.h>
+#import <architecture/ppc/asm_help.h>
+#import	<architecture/ppc/pseudo_inst.h>
+#import	<mach/ppc/syscall_sw.h>
+
+/* We use 8 bytes for LOCAL_VAR(1) and LOCAL_VAR(2) */
+NESTED(_vfork, 8, 0, 0, 0)
+	CALL_EXTERN(__cthread_fork_prepare)
+#if defined(__DYNAMIC__)
+.cstring
+LC1:
+	.ascii	"__dyld_fork_prepare\0"
+.text
+	.align 2
+	mflr	r0
+	bl	1f
+1:	mflr	r3
+	mtlr	r0
+	addis	r3,r3,ha16(LC1-1b)
+	addi	r3,r3,lo16(LC1-1b)
+	addi 	r4,r1,LOCAL_VAR(1)
+	bl 	__dyld_func_lookup
+	lwz	r3,LOCAL_VAR(1)(r1)
+	mtspr 	ctr,r3
+	bctrl	
+#endif
+	li	r0,SYS_vfork
+	sc
+	b	Lbotch			// error return
+
+	cmpwi	r4,0
+	beq	Lparent			// parent, since a1 == 0 in parent,
+					//		       1 in child
+#if defined(__DYNAMIC__)
+.cstring
+LC3:
+	.ascii	"__dyld_fork_child\0"
+.text
+	.align 2
+	mflr	r0
+	bl	1f
+1:	mflr	r3
+	mtlr	r0
+	addis	r3,r3,ha16(LC3-1b)
+	addi	r3,r3,lo16(LC3-1b)
+	addi 	r4,r1,LOCAL_VAR(1)
+	bl 	__dyld_func_lookup
+	lwz	r3,LOCAL_VAR(1)(r1)
+	mtspr 	ctr,r3
+	bctrl	
+#endif
+	li	r3,0
+	REG_TO_EXTERN(r3, EXT(_current_pid))
+	CALL_EXTERN(_fork_mach_init)
+	CALL_EXTERN(__cthread_fork_child)
+#if defined(__DYNAMIC__)
+.cstring
+LC4:
+	.ascii	"__dyld_fork_child_final\0"
+.text
+	.align 2
+	mflr	r0
+	bl	1f
+1:	mflr	r3
+	mtlr	r0
+	addis	r3,r3,ha16(LC4-1b)
+	addi	r3,r3,lo16(LC4-1b)
+	addi 	r4,r1,LOCAL_VAR(1)
+	bl 	__dyld_func_lookup
+	lwz	r3,LOCAL_VAR(1)(r1)
+	mtspr 	ctr,r3
+	bctrl	
+#endif
+
+	li	r3,0
+	b	Lreturn
+
+Lparent:
+#if defined(__DYNAMIC__)
+	stw	r3,LOCAL_VAR(2)(r1)	// save child pid
+	mflr	r0
+	bl	1f
+1:	mflr	r3
+	mtlr	r0
+	addis	r3,r3,ha16(LC2-1b)
+	addi	r3,r3,lo16(LC2-1b)
+	addi 	r4,r1,LOCAL_VAR(1)
+	bl 	__dyld_func_lookup
+	lwz	r3,LOCAL_VAR(1)(r1)
+	mtspr 	ctr,r3
+	bctrl		
+#endif
+	CALL_EXTERN(__cthread_fork_parent)
+#if defined(__DYNAMIC__)
+	lwz	r3,LOCAL_VAR(2)(r1)
+#endif
+	b	Lreturn
+
+Lbotch:	
+#if defined(__DYNAMIC__)
+.cstring
+LC2:
+	.ascii	"__dyld_fork_parent\0"
+.text
+	.align 2
+	stw	r3,LOCAL_VAR(2)(r1)	// save error value
+	mflr	r0
+	bl	1f
+1:	mflr	r3
+	mtlr	r0
+	addis	r3,r3,ha16(LC2-1b)
+	addi	r3,r3,lo16(LC2-1b)
+	addi 	r4,r1,LOCAL_VAR(1)
+	bl 	__dyld_func_lookup
+	lwz	r3,LOCAL_VAR(1)(r1)
+	mtspr 	ctr,r3
+	bctrl
+	lwz	r3,LOCAL_VAR(2)(r1)	// restore error value for cerror
+		
+#endif
+	CALL_EXTERN(cerror)
+	/*
+	 * We use cthread_fork_parent() to clean up after a fork error
+	 * (unlock cthreads and mailloc packages) so the parent
+	 * process can Malloc() after fork() errors without
+	 * deadlocking.
+	 */
+	CALL_EXTERN_AGAIN(__cthread_fork_parent)
+	li32	r3,-1			// error return
+Lreturn:	RETURN
+END(_vfork)
+#else
+#include "SYS.h"
+
+LEAF(_vfork)
+#if defined(__DYNAMIC__)
+	PICIFY(__current_pid)
+	mr	r5,PICIFY_REG
+	NON_LAZY_STUB(__current_pid)
+#else
+	lis	r5,ha16(__current_pid)
+	ori	r5,r5,lo16(__current_pid)
+#endif
+2:
+	lwarx	r6,0,r5			// dont cache pid across vfork
+	cmpwi	r6,0
+	ble-	3f			// is another vfork in progress
+	li	r6,0			// if not, erase the stored pid
+3:	
+	addi	r6,r6,-1		// count the parallel vforks in
+	stwcx.	r6,0,r5			// negative cached pid values
+	bne-	2b
+	
+	li	r0,SYS_vfork
+	sc
+	b	Lbotch			// error return
+
+	cmpwi	r4,0
+	beq	Lparent			// parent, since a1 == 0 in parent,
+
+	li	r3,0			// child
+	blr
+
+Lparent:
+	lwarx	r6,0,r5			// were back, decrement vfork count
+	addi	r6,r6,1
+	stwcx.	r6,0,r5
+	bne-	Lparent
+	blr
+
+Lbotch:
+	lwarx	r6,0,r5			// never went, decrement vfork count
+	addi	r6,r6,1
+	stwcx.	r6,0,r5
+	bne-	Lbotch
+
+	BRANCH_EXTERN(cerror)
+END(_vfork)
+#endif
+