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 * Copyright (c) 2014-2017 The strace developers.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "defs.h"
33
34 #ifndef FUTEX_PRIVATE_FLAG
35 # define FUTEX_PRIVATE_FLAG 128
36 #endif
37 #ifndef FUTEX_CLOCK_REALTIME
38 # define FUTEX_CLOCK_REALTIME 256
39 #endif
40
41 #include "xlat/futexops.h"
42 #include "xlat/futexwakeops.h"
43 #include "xlat/futexwakecmps.h"
44
SYS_FUNC(futex)45 SYS_FUNC(futex)
46 {
47 const kernel_ulong_t uaddr = tcp->u_arg[0];
48 const int op = tcp->u_arg[1];
49 const int cmd = op & 127;
50 const kernel_ulong_t timeout = tcp->u_arg[3];
51 const kernel_ulong_t uaddr2 = tcp->u_arg[4];
52 const unsigned int val = tcp->u_arg[2];
53 const unsigned int val2 = tcp->u_arg[3];
54 const unsigned int val3 = tcp->u_arg[5];
55 const char *comment;
56
57 printaddr(uaddr);
58 tprints(", ");
59 printxval(futexops, op, "FUTEX_???");
60 switch (cmd) {
61 case FUTEX_WAIT:
62 tprintf(", %u", val);
63 tprints(", ");
64 print_timespec(tcp, timeout);
65 break;
66 case FUTEX_LOCK_PI:
67 tprints(", ");
68 print_timespec(tcp, timeout);
69 break;
70 case FUTEX_WAIT_BITSET:
71 tprintf(", %u", val);
72 tprints(", ");
73 print_timespec(tcp, timeout);
74 tprintf(", %#x", val3);
75 break;
76 case FUTEX_WAKE_BITSET:
77 tprintf(", %u", val);
78 tprintf(", %#x", val3);
79 break;
80 case FUTEX_REQUEUE:
81 tprintf(", %u", val);
82 tprintf(", %u, ", val2);
83 printaddr(uaddr2);
84 break;
85 case FUTEX_CMP_REQUEUE:
86 case FUTEX_CMP_REQUEUE_PI:
87 tprintf(", %u", val);
88 tprintf(", %u, ", val2);
89 printaddr(uaddr2);
90 tprintf(", %u", val3);
91 break;
92 case FUTEX_WAKE_OP:
93 tprintf(", %u", val);
94 tprintf(", %u, ", val2);
95 printaddr(uaddr2);
96 tprints(", ");
97 if ((val3 >> 28) & 8)
98 tprints("FUTEX_OP_OPARG_SHIFT<<28|");
99 comment = printxval(futexwakeops, (val3 >> 28) & 0x7, NULL)
100 ? NULL : "FUTEX_OP_???";
101 tprints("<<28");
102 tprints_comment(comment);
103 tprintf("|%#x<<12|", (val3 >> 12) & 0xfff);
104 comment = printxval(futexwakecmps, (val3 >> 24) & 0xf, NULL)
105 ? NULL : "FUTEX_OP_CMP_???";
106 tprints("<<24");
107 tprints_comment(comment);
108 tprintf("|%#x", val3 & 0xfff);
109 break;
110 case FUTEX_WAIT_REQUEUE_PI:
111 tprintf(", %u", val);
112 tprints(", ");
113 print_timespec(tcp, timeout);
114 tprints(", ");
115 printaddr(uaddr2);
116 break;
117 case FUTEX_FD:
118 case FUTEX_WAKE:
119 tprintf(", %u", val);
120 break;
121 case FUTEX_UNLOCK_PI:
122 case FUTEX_TRYLOCK_PI:
123 break;
124 default:
125 tprintf(", %u", val);
126 tprints(", ");
127 printaddr(timeout);
128 tprints(", ");
129 printaddr(uaddr2);
130 tprintf(", %#x", val3);
131 break;
132 }
133
134 return RVAL_DECODED;
135 }
136