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(buf: bf, size, fmt: "%#x" , cmd); break; |
52 | } |
53 | |
54 | if (op & FUTEX_PRIVATE_FLAG) |
55 | printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "|%s%s" , show_prefix ? prefix : "" , "PRIVATE_FLAG" ); |
56 | |
57 | if (op & FUTEX_CLOCK_REALTIME) |
58 | printed += scnprintf(buf: bf + printed, size: size - printed, fmt: "|%s%s" , show_prefix ? prefix : "" , "CLOCK_REALTIME" ); |
59 | |
60 | return printed; |
61 | } |
62 | |
63 | #define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op |
64 | |