1/*-
2 * Copyright (c) 2006,2007 Konstantin Belousov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32#include "linux_assym.h"		/* system definitions */
33#include <machine/asmacros.h>		/* miscellaneous asm macros */
34
35#include "assym.s"
36
37futex_fault_decx:
38	movl	PCPU(CURPCB),%ecx
39futex_fault:
40	movl	$0,PCB_ONFAULT(%ecx)
41	movl	$-EFAULT,%eax
42	ret
43
44ENTRY(futex_xchgl)
45	movl	PCPU(CURPCB),%ecx
46	movl	$futex_fault,PCB_ONFAULT(%ecx)
47	movl	4(%esp),%eax
48	movl	8(%esp),%edx
49	cmpl    $VM_MAXUSER_ADDRESS-4,%edx
50	ja     	futex_fault
51	xchgl	%eax,(%edx)
52	movl	12(%esp),%edx
53	movl	%eax,(%edx)
54	xorl	%eax,%eax
55	movl	%eax,PCB_ONFAULT(%ecx)
56	ret
57
58ENTRY(futex_addl)
59	movl	PCPU(CURPCB),%ecx
60	movl	$futex_fault,PCB_ONFAULT(%ecx)
61	movl	4(%esp),%eax
62	movl	8(%esp),%edx
63	cmpl    $VM_MAXUSER_ADDRESS-4,%edx
64	ja     	futex_fault
65#ifdef SMP
66	lock
67#endif
68	xaddl	%eax,(%edx)
69	movl	12(%esp),%edx
70	movl	%eax,(%edx)
71	xorl	%eax,%eax
72	movl	%eax,PCB_ONFAULT(%ecx)
73	ret
74
75ENTRY(futex_orl)
76	movl	PCPU(CURPCB),%ecx
77	movl	$futex_fault_decx,PCB_ONFAULT(%ecx)
78	movl	8(%esp),%edx
79	cmpl    $VM_MAXUSER_ADDRESS-4,%edx
80	ja     	futex_fault
81	movl	(%edx),%eax
821:	movl	%eax,%ecx
83	orl	4(%esp),%ecx
84#ifdef SMP
85	lock
86#endif
87	cmpxchgl %ecx,(%edx)
88	jnz	1b
89futex_tail:
90	movl	12(%esp),%edx
91	movl	%eax,(%edx)
92	xorl	%eax,%eax
93	movl	PCPU(CURPCB),%ecx
94	movl	%eax,PCB_ONFAULT(%ecx)
95	ret
96
97ENTRY(futex_andl)
98	movl	PCPU(CURPCB),%ecx
99	movl	$futex_fault_decx,PCB_ONFAULT(%ecx)
100	movl	8(%esp),%edx
101	cmpl    $VM_MAXUSER_ADDRESS-4,%edx
102	ja     	futex_fault
103	movl	(%edx),%eax
1041:	movl	%eax,%ecx
105	andl	4(%esp),%ecx
106#ifdef SMP
107	lock
108#endif
109	cmpxchgl %ecx,(%edx)
110	jnz	1b
111	jmp	futex_tail
112
113ENTRY(futex_xorl)
114	movl	PCPU(CURPCB),%ecx
115	movl	$futex_fault_decx,PCB_ONFAULT(%ecx)
116	movl	8(%esp),%edx
117	cmpl    $VM_MAXUSER_ADDRESS-4,%edx
118	ja     	futex_fault
119	movl	(%edx),%eax
1201:	movl	%eax,%ecx
121	xorl	4(%esp),%ecx
122#ifdef SMP
123	lock
124#endif
125	cmpxchgl %ecx,(%edx)
126	jnz	1b
127	jmp	futex_tail
128