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: src/sys/amd64/linux32/linux32_support.s,v 1.1 2007/05/23 08:33:05 kib Exp $
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
54 ENTRY(futex_addl)
55 movq PCPU(CURPCB),%r8
56 movq $futex_fault,PCB_ONFAULT(%r8)
57 movq $VM_MAXUSER_ADDRESS-4,%rax
58 cmpq %rax,%rsi
59 ja futex_fault
60 #ifdef SMP
61 lock
62 #endif
63 xaddl %edi,(%rsi)
64 movl %edi,(%rdx)
65 xorl %eax,%eax
66 movq %rax,PCB_ONFAULT(%r8)
67 ret
68
69 ENTRY(futex_orl)
70 movq PCPU(CURPCB),%r8
71 movq $futex_fault,PCB_ONFAULT(%r8)
72 movq $VM_MAXUSER_ADDRESS-4,%rax
73 cmpq %rax,%rsi
74 ja futex_fault
75 movl (%rsi),%eax
76 1: movl %eax,%ecx
77 orl %edi,%ecx
78 #ifdef SMP
79 lock
80 #endif
81 cmpxchgl %ecx,(%rsi)
82 jnz 1b
83 movl %eax,(%rdx)
84 xorl %eax,%eax
85 movq %rax,PCB_ONFAULT(%r8)
86 ret
87
88 ENTRY(futex_andl)
89 movq PCPU(CURPCB),%r8
90 movq $futex_fault,PCB_ONFAULT(%r8)
91 movq $VM_MAXUSER_ADDRESS-4,%rax
92 cmpq %rax,%rsi
93 ja futex_fault
94 movl (%rsi),%eax
95 1: movl %eax,%ecx
96 andl %edi,%ecx
97 #ifdef SMP
98 lock
99 #endif
100 cmpxchgl %ecx,(%rsi)
101 jnz 1b
102 movl %eax,(%rdx)
103 xorl %eax,%eax
104 movq %rax,PCB_ONFAULT(%r8)
105 ret
106
107 ENTRY(futex_xorl)
108 movq PCPU(CURPCB),%r8
109 movq $futex_fault,PCB_ONFAULT(%r8)
110 movq $VM_MAXUSER_ADDRESS-4,%rax
111 cmpq %rax,%rsi
112 ja futex_fault
113 movl (%rsi),%eax
114 1: movl %eax,%ecx
115 xorl %edi,%ecx
116 #ifdef SMP
117 lock
118 #endif
119 cmpxchgl %ecx,(%rsi)
120 jnz 1b
121 movl %eax,(%rdx)
122 xorl %eax,%eax
123 movq %rax,PCB_ONFAULT(%r8)
124 ret
Cache object: f84f882134930cf59ce57bcd83e45110
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