1 // SPDX-License-Identifier: LGPL-2.1
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 
syscall_arg__scnprintf_futex_op(char * bf,size_t size,struct syscall_arg * arg)20 static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
21 {
22 	bool show_prefix = arg->show_string_prefix;
23 	const char *prefix = "FUTEX_";
24 	enum syscall_futex_args {
25 		SCF_UADDR   = (1 << 0),
26 		SCF_OP	    = (1 << 1),
27 		SCF_VAL	    = (1 << 2),
28 		SCF_TIMEOUT = (1 << 3),
29 		SCF_UADDR2  = (1 << 4),
30 		SCF_VAL3    = (1 << 5),
31 	};
32 	int op = arg->val;
33 	int cmd = op & FUTEX_CMD_MASK;
34 	size_t printed = 0;
35 
36 	switch (cmd) {
37 #define	P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", #n);
38 	P_FUTEX_OP(WAIT);	    arg->mask |= SCF_VAL3|SCF_UADDR2;		  break;
39 	P_FUTEX_OP(WAKE);	    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
40 	P_FUTEX_OP(FD);		    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
41 	P_FUTEX_OP(REQUEUE);	    arg->mask |= SCF_VAL3|SCF_TIMEOUT;	          break;
42 	P_FUTEX_OP(CMP_REQUEUE);    arg->mask |= SCF_TIMEOUT;			  break;
43 	P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT;			  break;
44 	P_FUTEX_OP(WAKE_OP);							  break;
45 	P_FUTEX_OP(LOCK_PI);	    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
46 	P_FUTEX_OP(UNLOCK_PI);	    arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
47 	P_FUTEX_OP(TRYLOCK_PI);	    arg->mask |= SCF_VAL3|SCF_UADDR2;		  break;
48 	P_FUTEX_OP(WAIT_BITSET);    arg->mask |= SCF_UADDR2;			  break;
49 	P_FUTEX_OP(WAKE_BITSET);    arg->mask |= SCF_UADDR2;			  break;
50 	P_FUTEX_OP(WAIT_REQUEUE_PI);						  break;
51 	default: printed = scnprintf(bf, size, "%#x", cmd);			  break;
52 	}
53 
54 	if (op & FUTEX_PRIVATE_FLAG)
55 		printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "PRIVATE_FLAG");
56 
57 	if (op & FUTEX_CLOCK_REALTIME)
58 		printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "CLOCK_REALTIME");
59 
60 	return printed;
61 }
62 
63 #define SCA_FUTEX_OP  syscall_arg__scnprintf_futex_op
64