1 /*
2 * Copyright (c) 2002-2003 Roland McGrath <[email protected]>
3 * Copyright (c) 2007-2008 Ulrich Drepper <[email protected]>
4 * Copyright (c) 2009 Andreas Schwab <[email protected]>
5 * Copyright (c) 2014-2015 Dmitry V. Levin <[email protected]>
6 * Copyright (c) 2014-2018 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 #ifndef FUTEX_OP_OPARG_SHIFT
41 # define FUTEX_OP_OPARG_SHIFT 8
42 #endif
43
44 #include "xlat/futexbitset.h"
45 #include "xlat/futexops.h"
46 #include "xlat/futexwakeops.h"
47 #include "xlat/futexwakecmps.h"
48
SYS_FUNC(futex)49 SYS_FUNC(futex)
50 {
51 const kernel_ulong_t uaddr = tcp->u_arg[0];
52 const int op = tcp->u_arg[1];
53 const int cmd = op & 127;
54 const kernel_ulong_t timeout = tcp->u_arg[3];
55 const kernel_ulong_t uaddr2 = tcp->u_arg[4];
56 const unsigned int val = tcp->u_arg[2];
57 const unsigned int val2 = tcp->u_arg[3];
58 const unsigned int val3 = tcp->u_arg[5];
59 const char *comment;
60
61 printaddr(uaddr);
62 tprints(", ");
63 printxval(futexops, op, "FUTEX_???");
64 switch (cmd) {
65 case FUTEX_WAIT:
66 tprintf(", %u", val);
67 tprints(", ");
68 print_timespec(tcp, timeout);
69 break;
70 case FUTEX_LOCK_PI:
71 tprints(", ");
72 print_timespec(tcp, timeout);
73 break;
74 case FUTEX_WAIT_BITSET:
75 tprintf(", %u", val);
76 tprints(", ");
77 print_timespec(tcp, timeout);
78 tprints(", ");
79 printxval(futexbitset, val3, NULL);
80 break;
81 case FUTEX_WAKE_BITSET:
82 tprintf(", %u", val);
83 tprints(", ");
84 printxval(futexbitset, val3, NULL);
85 break;
86 case FUTEX_REQUEUE:
87 tprintf(", %u", val);
88 tprintf(", %u, ", val2);
89 printaddr(uaddr2);
90 break;
91 case FUTEX_CMP_REQUEUE:
92 case FUTEX_CMP_REQUEUE_PI:
93 tprintf(", %u", val);
94 tprintf(", %u, ", val2);
95 printaddr(uaddr2);
96 tprintf(", %u", val3);
97 break;
98 case FUTEX_WAKE_OP:
99 tprintf(", %u", val);
100 tprintf(", %u, ", val2);
101 printaddr(uaddr2);
102 tprints(", ");
103 if ((val3 >> 28) & FUTEX_OP_OPARG_SHIFT) {
104 print_xlat(FUTEX_OP_OPARG_SHIFT);
105 tprints("<<28|");
106 }
107 comment = printxval(futexwakeops, (val3 >> 28) & 0x7, NULL)
108 ? NULL : "FUTEX_OP_???";
109 tprints("<<28");
110 tprints_comment(comment);
111 tprintf("|%#x<<12|", (val3 >> 12) & 0xfff);
112 comment = printxval(futexwakecmps, (val3 >> 24) & 0xf, NULL)
113 ? NULL : "FUTEX_OP_CMP_???";
114 tprints("<<24");
115 tprints_comment(comment);
116 tprintf("|%#x", val3 & 0xfff);
117 break;
118 case FUTEX_WAIT_REQUEUE_PI:
119 tprintf(", %u", val);
120 tprints(", ");
121 print_timespec(tcp, timeout);
122 tprints(", ");
123 printaddr(uaddr2);
124 break;
125 case FUTEX_FD:
126 case FUTEX_WAKE:
127 tprintf(", %u", val);
128 break;
129 case FUTEX_UNLOCK_PI:
130 case FUTEX_TRYLOCK_PI:
131 break;
132 default:
133 tprintf(", %u", val);
134 tprints(", ");
135 printaddr(timeout);
136 tprints(", ");
137 printaddr(uaddr2);
138 tprintf(", %#x", val3);
139 break;
140 }
141
142 return RVAL_DECODED;
143 }
144