diff options
Diffstat (limited to 'include/asm-x86_64/futex.h')
-rw-r--r-- | include/asm-x86_64/futex.h | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/include/asm-x86_64/futex.h b/include/asm-x86_64/futex.h deleted file mode 100644 index 5cdfb08013c3..000000000000 --- a/include/asm-x86_64/futex.h +++ /dev/null | |||
@@ -1,125 +0,0 @@ | |||
1 | #ifndef _ASM_FUTEX_H | ||
2 | #define _ASM_FUTEX_H | ||
3 | |||
4 | #ifdef __KERNEL__ | ||
5 | |||
6 | #include <linux/futex.h> | ||
7 | #include <asm/errno.h> | ||
8 | #include <asm/system.h> | ||
9 | #include <asm/uaccess.h> | ||
10 | |||
11 | #define __futex_atomic_op1(insn, ret, oldval, uaddr, oparg) \ | ||
12 | __asm__ __volatile ( \ | ||
13 | "1: " insn "\n" \ | ||
14 | "2: .section .fixup,\"ax\"\n\ | ||
15 | 3: mov %3, %1\n\ | ||
16 | jmp 2b\n\ | ||
17 | .previous\n\ | ||
18 | .section __ex_table,\"a\"\n\ | ||
19 | .align 8\n\ | ||
20 | .quad 1b,3b\n\ | ||
21 | .previous" \ | ||
22 | : "=r" (oldval), "=r" (ret), "=m" (*uaddr) \ | ||
23 | : "i" (-EFAULT), "m" (*uaddr), "0" (oparg), "1" (0)) | ||
24 | |||
25 | #define __futex_atomic_op2(insn, ret, oldval, uaddr, oparg) \ | ||
26 | __asm__ __volatile ( \ | ||
27 | "1: movl %2, %0\n\ | ||
28 | movl %0, %3\n" \ | ||
29 | insn "\n" \ | ||
30 | "2: " LOCK_PREFIX "cmpxchgl %3, %2\n\ | ||
31 | jnz 1b\n\ | ||
32 | 3: .section .fixup,\"ax\"\n\ | ||
33 | 4: mov %5, %1\n\ | ||
34 | jmp 3b\n\ | ||
35 | .previous\n\ | ||
36 | .section __ex_table,\"a\"\n\ | ||
37 | .align 8\n\ | ||
38 | .quad 1b,4b,2b,4b\n\ | ||
39 | .previous" \ | ||
40 | : "=&a" (oldval), "=&r" (ret), "=m" (*uaddr), \ | ||
41 | "=&r" (tem) \ | ||
42 | : "r" (oparg), "i" (-EFAULT), "m" (*uaddr), "1" (0)) | ||
43 | |||
44 | static inline int | ||
45 | futex_atomic_op_inuser (int encoded_op, int __user *uaddr) | ||
46 | { | ||
47 | int op = (encoded_op >> 28) & 7; | ||
48 | int cmp = (encoded_op >> 24) & 15; | ||
49 | int oparg = (encoded_op << 8) >> 20; | ||
50 | int cmparg = (encoded_op << 20) >> 20; | ||
51 | int oldval = 0, ret, tem; | ||
52 | if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) | ||
53 | oparg = 1 << oparg; | ||
54 | |||
55 | if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int))) | ||
56 | return -EFAULT; | ||
57 | |||
58 | pagefault_disable(); | ||
59 | |||
60 | switch (op) { | ||
61 | case FUTEX_OP_SET: | ||
62 | __futex_atomic_op1("xchgl %0, %2", ret, oldval, uaddr, oparg); | ||
63 | break; | ||
64 | case FUTEX_OP_ADD: | ||
65 | __futex_atomic_op1(LOCK_PREFIX "xaddl %0, %2", ret, oldval, | ||
66 | uaddr, oparg); | ||
67 | break; | ||
68 | case FUTEX_OP_OR: | ||
69 | __futex_atomic_op2("orl %4, %3", ret, oldval, uaddr, oparg); | ||
70 | break; | ||
71 | case FUTEX_OP_ANDN: | ||
72 | __futex_atomic_op2("andl %4, %3", ret, oldval, uaddr, ~oparg); | ||
73 | break; | ||
74 | case FUTEX_OP_XOR: | ||
75 | __futex_atomic_op2("xorl %4, %3", ret, oldval, uaddr, oparg); | ||
76 | break; | ||
77 | default: | ||
78 | ret = -ENOSYS; | ||
79 | } | ||
80 | |||
81 | pagefault_enable(); | ||
82 | |||
83 | if (!ret) { | ||
84 | switch (cmp) { | ||
85 | case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; | ||
86 | case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; | ||
87 | case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; | ||
88 | case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; | ||
89 | case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; | ||
90 | case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; | ||
91 | default: ret = -ENOSYS; | ||
92 | } | ||
93 | } | ||
94 | return ret; | ||
95 | } | ||
96 | |||
97 | static inline int | ||
98 | futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) | ||
99 | { | ||
100 | if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) | ||
101 | return -EFAULT; | ||
102 | |||
103 | __asm__ __volatile__( | ||
104 | "1: " LOCK_PREFIX "cmpxchgl %3, %1 \n" | ||
105 | |||
106 | "2: .section .fixup, \"ax\" \n" | ||
107 | "3: mov %2, %0 \n" | ||
108 | " jmp 2b \n" | ||
109 | " .previous \n" | ||
110 | |||
111 | " .section __ex_table, \"a\" \n" | ||
112 | " .align 8 \n" | ||
113 | " .quad 1b,3b \n" | ||
114 | " .previous \n" | ||
115 | |||
116 | : "=a" (oldval), "=m" (*uaddr) | ||
117 | : "i" (-EFAULT), "r" (newval), "0" (oldval) | ||
118 | : "memory" | ||
119 | ); | ||
120 | |||
121 | return oldval; | ||
122 | } | ||
123 | |||
124 | #endif | ||
125 | #endif | ||