1 /*
2 * Copyright (c) 2004-2007 Ulrich Drepper <drepper@redhat.com>
3 * Copyright (c) 2004 Roland McGrath <roland@redhat.com>
4 * Copyright (c) 2005-2015 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "defs.h"
31 #include <fcntl.h>
32 #ifdef HAVE_SYS_EPOLL_H
33 # include <sys/epoll.h>
34 #endif
35
SYS_FUNC(epoll_create)36 SYS_FUNC(epoll_create)
37 {
38 tprintf("%d", (int) tcp->u_arg[0]);
39
40 return RVAL_DECODED | RVAL_FD;
41 }
42
43 #include "xlat/epollflags.h"
44
SYS_FUNC(epoll_create1)45 SYS_FUNC(epoll_create1)
46 {
47 printflags(epollflags, tcp->u_arg[0], "EPOLL_???");
48
49 return RVAL_DECODED | RVAL_FD;
50 }
51
52 #ifdef HAVE_SYS_EPOLL_H
53 # include "xlat/epollevents.h"
54
55 static void
print_epoll_event(struct epoll_event * ev)56 print_epoll_event(struct epoll_event *ev)
57 {
58 tprints("{");
59 printflags(epollevents, ev->events, "EPOLL???");
60 /* We cannot know what format the program uses, so print u32 and u64
61 which will cover every value. */
62 tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
63 ev->data.u32, ev->data.u64);
64 }
65 #endif
66
67 #include "xlat/epollctls.h"
68
SYS_FUNC(epoll_ctl)69 SYS_FUNC(epoll_ctl)
70 {
71 struct epoll_event ev;
72
73 printfd(tcp, tcp->u_arg[0]);
74 tprints(", ");
75 printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
76 tprints(", ");
77 printfd(tcp, tcp->u_arg[2]);
78 tprints(", ");
79 #ifdef HAVE_SYS_EPOLL_H
80 if (EPOLL_CTL_DEL == tcp->u_arg[1])
81 printaddr(tcp->u_arg[3]);
82 else if (!umove_or_printaddr(tcp, tcp->u_arg[3], &ev))
83 print_epoll_event(&ev);
84 #else
85 printaddr(tcp->u_arg[3]);
86 #endif
87
88 return RVAL_DECODED;
89 }
90
91 static void
print_epoll_event_array(struct tcb * tcp,const long addr,const long len)92 print_epoll_event_array(struct tcb *tcp, const long addr, const long len)
93 {
94 #ifdef HAVE_SYS_EPOLL_H
95 struct epoll_event ev, *start, *cur, *end;
96
97 if (!len) {
98 tprints("[]");
99 return;
100 }
101
102 if (umove_or_printaddr(tcp, addr, &ev))
103 return;
104
105 tprints("[");
106 print_epoll_event(&ev);
107
108 start = (struct epoll_event *) addr;
109 end = start + len;
110 for (cur = start + 1; cur < end; ++cur) {
111 tprints(", ");
112 if (umove_or_printaddr(tcp, (long) cur, &ev))
113 break;
114 print_epoll_event(&ev);
115 }
116 tprints("]");
117 #else
118 printaddr(addr);
119 #endif
120 }
121
122 static void
epoll_wait_common(struct tcb * tcp)123 epoll_wait_common(struct tcb *tcp)
124 {
125 if (entering(tcp)) {
126 printfd(tcp, tcp->u_arg[0]);
127 tprints(", ");
128 } else {
129 print_epoll_event_array(tcp, tcp->u_arg[1], tcp->u_rval);
130 tprintf(", %d, %d", (int) tcp->u_arg[2], (int) tcp->u_arg[3]);
131 }
132 }
133
SYS_FUNC(epoll_wait)134 SYS_FUNC(epoll_wait)
135 {
136 epoll_wait_common(tcp);
137 return 0;
138 }
139
SYS_FUNC(epoll_pwait)140 SYS_FUNC(epoll_pwait)
141 {
142 epoll_wait_common(tcp);
143 if (exiting(tcp)) {
144 tprints(", ");
145 /* NB: kernel requires arg[5] == NSIG / 8 */
146 print_sigset_addr_len(tcp, tcp->u_arg[4], tcp->u_arg[5]);
147 tprintf(", %lu", tcp->u_arg[5]);
148 }
149 return 0;
150 }
151