1 /*-
2 * Copyright (c) 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 "linux32_assym.h" /* system definitions */
33 #include <machine/asmacros.h> /* miscellaneous asm macros */
34
35 #include "assym.s"
36
37 futex_fault:
38 movq $0,PCB_ONFAULT(%r8)
39 movl $-EFAULT,%eax
40 ret
41
42 ENTRY(futex_xchgl)
43 movq PCPU(CURPCB),%r8
44 movq $futex_fault,PCB_ONFAULT(%r8)
45 movq $VM_MAXUSER_ADDRESS-4,%rax
46 cmpq %rax,%rsi
47 ja futex_fault
48 xchgl %edi,(%rsi)
49 movl %edi,(%rdx)
50 xorl %eax,%eax
51 movq %rax,PCB_ONFAULT(%r8)
52 ret
53 END(futex_xchgl)
54
55 ENTRY(futex_addl)
56 movq PCPU(CURPCB),%r8
57 movq $futex_fault,PCB_ONFAULT(%r8)
58 movq $VM_MAXUSER_ADDRESS-4,%rax
59 cmpq %rax,%rsi
60 ja futex_fault
61 #ifdef SMP
62 lock
63 #endif
64 xaddl %edi,(%rsi)
65 movl %edi,(%rdx)
66 xorl %eax,%eax
67 movq %rax,PCB_ONFAULT(%r8)
68 ret
69 END(futex_addl)
70
71 ENTRY(futex_orl)
72 movq PCPU(CURPCB),%r8
73 movq $futex_fault,PCB_ONFAULT(%r8)
74 movq $VM_MAXUSER_ADDRESS-4,%rax
75 cmpq %rax,%rsi
76 ja futex_fault
77 movl (%rsi),%eax
78 1: movl %eax,%ecx
79 orl %edi,%ecx
80 #ifdef SMP
81 lock
82 #endif
83 cmpxchgl %ecx,(%rsi)
84 jnz 1b
85 movl %eax,(%rdx)
86 xorl %eax,%eax
87 movq %rax,PCB_ONFAULT(%r8)
88 ret
89 END(futex_orl)
90
91 ENTRY(futex_andl)
92 movq PCPU(CURPCB),%r8
93 movq $futex_fault,PCB_ONFAULT(%r8)
94 movq $VM_MAXUSER_ADDRESS-4,%rax
95 cmpq %rax,%rsi
96 ja futex_fault
97 movl (%rsi),%eax
98 1: movl %eax,%ecx
99 andl %edi,%ecx
100 #ifdef SMP
101 lock
102 #endif
103 cmpxchgl %ecx,(%rsi)
104 jnz 1b
105 movl %eax,(%rdx)
106 xorl %eax,%eax
107 movq %rax,PCB_ONFAULT(%r8)
108 ret
109 END(futex_andl)
110
111 ENTRY(futex_xorl)
112 movq PCPU(CURPCB),%r8
113 movq $futex_fault,PCB_ONFAULT(%r8)
114 movq $VM_MAXUSER_ADDRESS-4,%rax
115 cmpq %rax,%rsi
116 ja futex_fault
117 movl (%rsi),%eax
118 1: movl %eax,%ecx
119 xorl %edi,%ecx
120 #ifdef SMP
121 lock
122 #endif
123 cmpxchgl %ecx,(%rsi)
124 jnz 1b
125 movl %eax,(%rdx)
126 xorl %eax,%eax
127 movq %rax,PCB_ONFAULT(%r8)
128 ret
129 END(futex_xorl)
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