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 #include <sys/epoll.h>
33
SYS_FUNC(epoll_create)34 SYS_FUNC(epoll_create)
35 {
36 tprintf("%d", (int) tcp->u_arg[0]);
37
38 return RVAL_DECODED | RVAL_FD;
39 }
40
41 #include "xlat/epollflags.h"
42
SYS_FUNC(epoll_create1)43 SYS_FUNC(epoll_create1)
44 {
45 printflags(epollflags, tcp->u_arg[0], "EPOLL_???");
46
47 return RVAL_DECODED | RVAL_FD;
48 }
49
50 #include "xlat/epollevents.h"
51
52 static bool
print_epoll_event(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)53 print_epoll_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
54 {
55 const struct epoll_event *ev = elem_buf;
56
57 tprints("{");
58 printflags(epollevents, ev->events, "EPOLL???");
59 /* We cannot know what format the program uses, so print u32 and u64
60 which will cover every value. */
61 tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
62 ev->data.u32, ev->data.u64);
63
64 return true;
65 }
66
67 #include "xlat/epollctls.h"
68
SYS_FUNC(epoll_ctl)69 SYS_FUNC(epoll_ctl)
70 {
71 printfd(tcp, tcp->u_arg[0]);
72 tprints(", ");
73 const unsigned int op = tcp->u_arg[1];
74 printxval(epollctls, op, "EPOLL_CTL_???");
75 tprints(", ");
76 printfd(tcp, tcp->u_arg[2]);
77 tprints(", ");
78 struct epoll_event ev;
79 if (EPOLL_CTL_DEL == op)
80 printaddr(tcp->u_arg[3]);
81 else if (!umove_or_printaddr(tcp, tcp->u_arg[3], &ev))
82 print_epoll_event(tcp, &ev, sizeof(ev), 0);
83
84 return RVAL_DECODED;
85 }
86
87 static void
epoll_wait_common(struct tcb * tcp)88 epoll_wait_common(struct tcb *tcp)
89 {
90 if (entering(tcp)) {
91 printfd(tcp, tcp->u_arg[0]);
92 tprints(", ");
93 } else {
94 struct epoll_event ev;
95 print_array(tcp, tcp->u_arg[1], tcp->u_rval, &ev, sizeof(ev),
96 umoven_or_printaddr, print_epoll_event, 0);
97 tprintf(", %d, %d", (int) tcp->u_arg[2], (int) tcp->u_arg[3]);
98 }
99 }
100
SYS_FUNC(epoll_wait)101 SYS_FUNC(epoll_wait)
102 {
103 epoll_wait_common(tcp);
104 return 0;
105 }
106
SYS_FUNC(epoll_pwait)107 SYS_FUNC(epoll_pwait)
108 {
109 epoll_wait_common(tcp);
110 if (exiting(tcp)) {
111 tprints(", ");
112 /* NB: kernel requires arg[5] == NSIG_BYTES */
113 print_sigset_addr_len(tcp, tcp->u_arg[4], tcp->u_arg[5]);
114 tprintf(", %" PRI_klu, tcp->u_arg[5]);
115 }
116 return 0;
117 }
118