1 /*
2 * Copyright (c) 2018 The strace developers.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "defs.h"
29
30 #include <linux/ioctl.h>
31
32 #include "perf_event_struct.h"
33
34 #define XLAT_MACROS_ONLY
35 # include "xlat/perf_ioctl_cmds.h"
36 #undef XLAT_MACROS_ONLY
37
38 #include "xlat/perf_ioctl_flags.h"
39
40 #include MPERS_DEFS
41
42 static int
perf_ioctl_query_bpf(struct tcb * const tcp,const kernel_ulong_t arg)43 perf_ioctl_query_bpf(struct tcb *const tcp, const kernel_ulong_t arg)
44 {
45 uint32_t info;
46
47 if (entering(tcp)) {
48 tprints(", ");
49
50 if (umove_or_printaddr(tcp, arg, &info))
51 return RVAL_IOCTL_DECODED;
52
53 tprintf("{ids_len=%u, ", info);
54
55 return 0;
56 }
57
58 if (syserror(tcp) ||
59 umove(tcp, arg + offsetof(struct perf_event_query_bpf, prog_cnt),
60 &info)) {
61 tprints("...}");
62
63 return RVAL_IOCTL_DECODED;
64 }
65
66 tprintf("prog_cnt=%u, ids=", info);
67
68 print_array(tcp, arg + offsetof(struct perf_event_query_bpf, ids), info,
69 &info, sizeof(info),
70 tfetch_mem, print_uint32_array_member, NULL);
71
72 tprints("}");
73
74 return RVAL_IOCTL_DECODED;
75 }
76
77 static int
perf_ioctl_modify_attributes(struct tcb * const tcp,const kernel_ulong_t arg)78 perf_ioctl_modify_attributes(struct tcb *const tcp, const kernel_ulong_t arg)
79 {
80 tprints(", ");
81 if (!fetch_perf_event_attr(tcp, arg))
82 print_perf_event_attr(tcp, arg);
83
84 return RVAL_IOCTL_DECODED;
85 }
86
MPERS_PRINTER_DECL(int,perf_ioctl,struct tcb * const tcp,const unsigned int code,const kernel_ulong_t arg)87 MPERS_PRINTER_DECL(int, perf_ioctl,
88 struct tcb *const tcp, const unsigned int code,
89 const kernel_ulong_t arg)
90 {
91 switch (code) {
92 case PERF_EVENT_IOC_ENABLE:
93 case PERF_EVENT_IOC_DISABLE:
94 case PERF_EVENT_IOC_RESET:
95 tprints(", ");
96 printflags(perf_ioctl_flags, arg, "PERF_IOC_FLAG_???");
97
98 return RVAL_IOCTL_DECODED;
99
100 case PERF_EVENT_IOC_REFRESH:
101 tprintf(", %d", (int) arg);
102
103 return RVAL_IOCTL_DECODED;
104
105 case PERF_EVENT_IOC_PERIOD:
106 tprints(", ");
107 printnum_int64(tcp, arg, "%" PRIu64);
108
109 return RVAL_IOCTL_DECODED;
110
111 case PERF_EVENT_IOC_SET_OUTPUT:
112 case PERF_EVENT_IOC_SET_BPF:
113 tprintf(", ");
114 printfd(tcp, (int) arg);
115
116 return RVAL_IOCTL_DECODED;
117
118 case PERF_EVENT_IOC_PAUSE_OUTPUT:
119 tprintf(", %" PRI_klu, arg);
120
121 return RVAL_IOCTL_DECODED;
122
123 /*
124 * The following ioctl requests are personality-specific
125 * due to the pointer size.
126 */
127 case PERF_EVENT_IOC_SET_FILTER:
128 tprints(", ");
129 printstr_ex(tcp, arg, get_pagesize(), QUOTE_0_TERMINATED);
130
131 return RVAL_IOCTL_DECODED;
132
133 case PERF_EVENT_IOC_ID:
134 if (entering(tcp)) {
135 tprints(", ");
136
137 return 0;
138 }
139
140 printnum_int64(tcp, arg, "%" PRIu64);
141
142 return RVAL_IOCTL_DECODED;
143
144 case PERF_EVENT_IOC_QUERY_BPF:
145 return perf_ioctl_query_bpf(tcp, arg);
146
147 case PERF_EVENT_IOC_MODIFY_ATTRIBUTES:
148 return perf_ioctl_modify_attributes(tcp, arg);
149
150 default:
151 return RVAL_DECODED;
152 }
153 }
154