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
19static 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