1 /*
2 * Copyright (c) 1993 Ulrich Pegelow <pegelow@moorea.uni-muenster.de>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * Copyright (c) 2003-2006 Roland McGrath <roland@redhat.com>
7 * Copyright (c) 2006-2015 Dmitry V. Levin <ldv@altlinux.org>
8 * Copyright (c) 2015-2018 The strace developers.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "defs.h"
35 #include "ipc_defs.h"
36
37 #ifdef HAVE_SYS_MSG_H
38 # include <sys/msg.h>
39 #elif defined HAVE_LINUX_MSG_H
40 # include <linux/msg.h>
41 #endif
42
43 #include "xlat/ipc_msg_flags.h"
44 #include "xlat/ipc_private.h"
45 #include "xlat/resource_flags.h"
46
SYS_FUNC(msgget)47 SYS_FUNC(msgget)
48 {
49 printxval(ipc_private, (unsigned int) tcp->u_arg[0], NULL);
50 tprints(", ");
51 if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
52 tprints("|");
53 print_numeric_umode_t(tcp->u_arg[1] & 0777);
54 return RVAL_DECODED;
55 }
56
57 static void
tprint_msgsnd(struct tcb * const tcp,const kernel_ulong_t addr,const kernel_ulong_t count,const unsigned int flags)58 tprint_msgsnd(struct tcb *const tcp, const kernel_ulong_t addr,
59 const kernel_ulong_t count, const unsigned int flags)
60 {
61 tprint_msgbuf(tcp, addr, count);
62 printflags(ipc_msg_flags, flags, "MSG_???");
63 }
64
SYS_FUNC(msgsnd)65 SYS_FUNC(msgsnd)
66 {
67 tprintf("%d, ", (int) tcp->u_arg[0]);
68 if (indirect_ipccall(tcp)) {
69 tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
70 tcp->u_arg[2]);
71 } else {
72 tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
73 tcp->u_arg[3]);
74 }
75 return RVAL_DECODED;
76 }
77
78 static void
tprint_msgrcv(struct tcb * const tcp,const kernel_ulong_t addr,const kernel_ulong_t count,const kernel_ulong_t msgtyp)79 tprint_msgrcv(struct tcb *const tcp, const kernel_ulong_t addr,
80 const kernel_ulong_t count, const kernel_ulong_t msgtyp)
81 {
82 tprint_msgbuf(tcp, addr, count);
83 tprintf("%" PRI_kld ", ", msgtyp);
84 }
85
86 static int
fetch_msgrcv_args(struct tcb * const tcp,const kernel_ulong_t addr,kernel_ulong_t * const pair)87 fetch_msgrcv_args(struct tcb *const tcp, const kernel_ulong_t addr,
88 kernel_ulong_t *const pair)
89 {
90 if (current_wordsize == sizeof(*pair)) {
91 if (umoven_or_printaddr(tcp, addr, 2 * sizeof(*pair), pair))
92 return -1;
93 } else {
94 unsigned int tmp[2];
95
96 if (umove_or_printaddr(tcp, addr, &tmp))
97 return -1;
98 pair[0] = tmp[0];
99 pair[1] = (int) tmp[1];
100 }
101 return 0;
102 }
103
SYS_FUNC(msgrcv)104 SYS_FUNC(msgrcv)
105 {
106 if (entering(tcp)) {
107 tprintf("%d, ", (int) tcp->u_arg[0]);
108 } else {
109 if (indirect_ipccall(tcp)) {
110 const bool direct =
111 #ifdef SPARC64
112 current_wordsize == 8 ||
113 #endif
114 get_tcb_priv_ulong(tcp) != 0;
115 if (direct) {
116 tprint_msgrcv(tcp, tcp->u_arg[3],
117 tcp->u_arg[1], tcp->u_arg[4]);
118 } else {
119 kernel_ulong_t pair[2];
120
121 if (fetch_msgrcv_args(tcp, tcp->u_arg[3], pair))
122 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
123 else
124 tprint_msgrcv(tcp, pair[0],
125 tcp->u_arg[1], pair[1]);
126 }
127 printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
128 } else {
129 tprint_msgrcv(tcp, tcp->u_arg[1],
130 tcp->u_arg[2], tcp->u_arg[3]);
131 printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
132 }
133 }
134 return 0;
135 }
136