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