1 // SPDX-License-Identifier: LGPL-2.1
2 #include <linux/futex.h>
3
4 #ifndef FUTEX_WAIT_BITSET
5 #define FUTEX_WAIT_BITSET 9
6 #endif
7 #ifndef FUTEX_WAKE_BITSET
8 #define FUTEX_WAKE_BITSET 10
9 #endif
10 #ifndef FUTEX_WAIT_REQUEUE_PI
11 #define FUTEX_WAIT_REQUEUE_PI 11
12 #endif
13 #ifndef FUTEX_CMP_REQUEUE_PI
14 #define FUTEX_CMP_REQUEUE_PI 12
15 #endif
16 #ifndef FUTEX_CLOCK_REALTIME
17 #define FUTEX_CLOCK_REALTIME 256
18 #endif
19
20 static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
21 {
22 bool show_prefix = arg->show_string_prefix;
23 const char *prefix = "FUTEX_";
24 enum syscall_futex_args {
25 SCF_UADDR = (1 << 0),
26 SCF_OP = (1 << 1),
27 SCF_VAL = (1 << 2),
28 SCF_TIMEOUT = (1 << 3),
29 SCF_UADDR2 = (1 << 4),
30 SCF_VAL3 = (1 << 5),
31 };
32 int op = arg->val;
33 int cmd = op & FUTEX_CMD_MASK;
34 size_t printed = 0;
35
36 switch (cmd) {
37 #define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", #n);
38 P_FUTEX_OP(WAIT); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
39 P_FUTEX_OP(WAKE); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
40 P_FUTEX_OP(FD); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
41 P_FUTEX_OP(REQUEUE); arg->mask |= SCF_VAL3|SCF_TIMEOUT; break;
42 P_FUTEX_OP(CMP_REQUEUE); arg->mask |= SCF_TIMEOUT; break;
43 P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT; break;
44 P_FUTEX_OP(WAKE_OP); break;
45 P_FUTEX_OP(LOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
46 P_FUTEX_OP(UNLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
47 P_FUTEX_OP(TRYLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
48 P_FUTEX_OP(WAIT_BITSET); arg->mask |= SCF_UADDR2; break;
49 P_FUTEX_OP(WAKE_BITSET); arg->mask |= SCF_UADDR2; break;
50 P_FUTEX_OP(WAIT_REQUEUE_PI); break;
51 default: printed = scnprintf(bf, size, "%#x", cmd); break;
52 }
53
54 if (op & FUTEX_PRIVATE_FLAG)
55 printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "PRIVATE_FLAG");
56
57 if (op & FUTEX_CLOCK_REALTIME)
58 printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "CLOCK_REALTIME");
59
60 return printed;
61 }
62
63 #define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op
64
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