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