1 // SPDX-License-Identifier: GPL-2.0 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 enum syscall_futex_args { 23 SCF_UADDR = (1 << 0), 24 SCF_OP = (1 << 1), 25 SCF_VAL = (1 << 2), 26 SCF_TIMEOUT = (1 << 3), 27 SCF_UADDR2 = (1 << 4), 28 SCF_VAL3 = (1 << 5), 29 }; 30 int op = arg->val; 31 int cmd = op & FUTEX_CMD_MASK; 32 size_t printed = 0; 33 34 switch (cmd) { 35 #define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, #n); 36 P_FUTEX_OP(WAIT); arg->mask |= SCF_VAL3|SCF_UADDR2; break; 37 P_FUTEX_OP(WAKE); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; 38 P_FUTEX_OP(FD); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; 39 P_FUTEX_OP(REQUEUE); arg->mask |= SCF_VAL3|SCF_TIMEOUT; break; 40 P_FUTEX_OP(CMP_REQUEUE); arg->mask |= SCF_TIMEOUT; break; 41 P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT; break; 42 P_FUTEX_OP(WAKE_OP); break; 43 P_FUTEX_OP(LOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; 44 P_FUTEX_OP(UNLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break; 45 P_FUTEX_OP(TRYLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2; break; 46 P_FUTEX_OP(WAIT_BITSET); arg->mask |= SCF_UADDR2; break; 47 P_FUTEX_OP(WAKE_BITSET); arg->mask |= SCF_UADDR2; break; 48 P_FUTEX_OP(WAIT_REQUEUE_PI); break; 49 default: printed = scnprintf(bf, size, "%#x", cmd); break; 50 } 51 52 if (op & FUTEX_PRIVATE_FLAG) 53 printed += scnprintf(bf + printed, size - printed, "|PRIV"); 54 55 if (op & FUTEX_CLOCK_REALTIME) 56 printed += scnprintf(bf + printed, size - printed, "|CLKRT"); 57 58 return printed; 59 } 60 61 #define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op 62