0001
0002 #include <linux/futex.h>
0003
0004 #ifndef FUTEX_WAIT_BITSET
0005 #define FUTEX_WAIT_BITSET 9
0006 #endif
0007 #ifndef FUTEX_WAKE_BITSET
0008 #define FUTEX_WAKE_BITSET 10
0009 #endif
0010 #ifndef FUTEX_WAIT_REQUEUE_PI
0011 #define FUTEX_WAIT_REQUEUE_PI 11
0012 #endif
0013 #ifndef FUTEX_CMP_REQUEUE_PI
0014 #define FUTEX_CMP_REQUEUE_PI 12
0015 #endif
0016 #ifndef FUTEX_CLOCK_REALTIME
0017 #define FUTEX_CLOCK_REALTIME 256
0018 #endif
0019
0020 static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
0021 {
0022 bool show_prefix = arg->show_string_prefix;
0023 const char *prefix = "FUTEX_";
0024 enum syscall_futex_args {
0025 SCF_UADDR = (1 << 0),
0026 SCF_OP = (1 << 1),
0027 SCF_VAL = (1 << 2),
0028 SCF_TIMEOUT = (1 << 3),
0029 SCF_UADDR2 = (1 << 4),
0030 SCF_VAL3 = (1 << 5),
0031 };
0032 int op = arg->val;
0033 int cmd = op & FUTEX_CMD_MASK;
0034 size_t printed = 0;
0035
0036 switch (cmd) {
0037 #define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", #n);
0038 P_FUTEX_OP(WAIT); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
0039 P_FUTEX_OP(WAKE); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
0040 P_FUTEX_OP(FD); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
0041 P_FUTEX_OP(REQUEUE); arg->mask |= SCF_VAL3|SCF_TIMEOUT; break;
0042 P_FUTEX_OP(CMP_REQUEUE); arg->mask |= SCF_TIMEOUT; break;
0043 P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT; break;
0044 P_FUTEX_OP(WAKE_OP); break;
0045 P_FUTEX_OP(LOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
0046 P_FUTEX_OP(UNLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
0047 P_FUTEX_OP(TRYLOCK_PI); arg->mask |= SCF_VAL3|SCF_UADDR2; break;
0048 P_FUTEX_OP(WAIT_BITSET); arg->mask |= SCF_UADDR2; break;
0049 P_FUTEX_OP(WAKE_BITSET); arg->mask |= SCF_UADDR2; break;
0050 P_FUTEX_OP(WAIT_REQUEUE_PI); break;
0051 default: printed = scnprintf(bf, size, "%#x", cmd); break;
0052 }
0053
0054 if (op & FUTEX_PRIVATE_FLAG)
0055 printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "PRIVATE_FLAG");
0056
0057 if (op & FUTEX_CLOCK_REALTIME)
0058 printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "CLOCK_REALTIME");
0059
0060 return printed;
0061 }
0062
0063 #define SCA_FUTEX_OP syscall_arg__scnprintf_futex_op
