1 /*
2 * Copyright (c) 2002-2003 Roland McGrath <roland@redhat.com>
3 * Copyright (c) 2007-2008 Ulrich Drepper <drepper@redhat.com>
4 * Copyright (c) 2009 Andreas Schwab <schwab@redhat.com>
5 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "defs.h"
32
33 #ifdef HAVE_LINUX_FUTEX_H
34 # include <linux/futex.h>
35 #endif
36
37 #ifndef FUTEX_PRIVATE_FLAG
38 # define FUTEX_PRIVATE_FLAG 128
39 #endif
40 #ifndef FUTEX_CLOCK_REALTIME
41 # define FUTEX_CLOCK_REALTIME 256
42 #endif
43
44 #include "xlat/futexops.h"
45 #include "xlat/futexwakeops.h"
46 #include "xlat/futexwakecmps.h"
47
SYS_FUNC(futex)48 SYS_FUNC(futex)
49 {
50 const long uaddr = tcp->u_arg[0];
51 const int op = tcp->u_arg[1];
52 const int cmd = op & 127;
53 const long timeout = tcp->u_arg[3];
54 const long uaddr2 = tcp->u_arg[4];
55 const unsigned int val = tcp->u_arg[2];
56 const unsigned int val2 = tcp->u_arg[3];
57 const unsigned int val3 = tcp->u_arg[5];
58
59 printaddr(uaddr);
60 tprints(", ");
61 printxval(futexops, op, "FUTEX_???");
62 tprintf(", %u", val);
63 switch (cmd) {
64 case FUTEX_WAIT:
65 case FUTEX_LOCK_PI:
66 tprints(", ");
67 print_timespec(tcp, timeout);
68 break;
69 case FUTEX_WAIT_BITSET:
70 tprints(", ");
71 print_timespec(tcp, timeout);
72 tprintf(", %x", val3);
73 break;
74 case FUTEX_WAKE_BITSET:
75 tprintf(", %x", val3);
76 break;
77 case FUTEX_REQUEUE:
78 tprintf(", %u, ", val2);
79 printaddr(uaddr2);
80 break;
81 case FUTEX_CMP_REQUEUE:
82 case FUTEX_CMP_REQUEUE_PI:
83 tprintf(", %u, ", val2);
84 printaddr(uaddr2);
85 tprintf(", %u", val3);
86 break;
87 case FUTEX_WAKE_OP:
88 tprintf(", %u, ", val2);
89 printaddr(uaddr2);
90 tprints(", {");
91 if ((val3 >> 28) & 8)
92 tprints("FUTEX_OP_OPARG_SHIFT|");
93 printxval(futexwakeops, (val3 >> 28) & 0x7, "FUTEX_OP_???");
94 tprintf(", %u, ", (val3 >> 12) & 0xfff);
95 if ((val3 >> 24) & 8)
96 tprints("FUTEX_OP_OPARG_SHIFT|");
97 printxval(futexwakecmps, (val3 >> 24) & 0x7, "FUTEX_OP_CMP_???");
98 tprintf(", %u}", val3 & 0xfff);
99 break;
100 case FUTEX_WAIT_REQUEUE_PI:
101 tprints(", ");
102 print_timespec(tcp, timeout);
103 tprints(", ");
104 printaddr(uaddr2);
105 break;
106 case FUTEX_WAKE:
107 case FUTEX_UNLOCK_PI:
108 case FUTEX_TRYLOCK_PI:
109 break;
110 default:
111 tprintf(", %lx, %lx, %x", timeout, uaddr2, val3);
112 break;
113 }
114
115 return RVAL_DECODED;
116 }
117