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
20static 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