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) 2015-2017 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/resource_flags.h"
45
SYS_FUNC(msgget)46 SYS_FUNC(msgget)
47 {
48 const int key = (int) tcp->u_arg[0];
49 if (key)
50 tprintf("%#x", key);
51 else
52 tprints("IPC_PRIVATE");
53 tprints(", ");
54 if (printflags(resource_flags, tcp->u_arg[1] & ~0777, NULL) != 0)
55 tprints("|");
56 print_numeric_umode_t(tcp->u_arg[1] & 0777);
57 return RVAL_DECODED;
58 }
59
60 static void
tprint_msgsnd(struct tcb * const tcp,const kernel_ulong_t addr,const kernel_ulong_t count,const unsigned int flags)61 tprint_msgsnd(struct tcb *const tcp, const kernel_ulong_t addr,
62 const kernel_ulong_t count, const unsigned int flags)
63 {
64 tprint_msgbuf(tcp, addr, count);
65 printflags(ipc_msg_flags, flags, "MSG_???");
66 }
67
SYS_FUNC(msgsnd)68 SYS_FUNC(msgsnd)
69 {
70 tprintf("%d, ", (int) tcp->u_arg[0]);
71 if (indirect_ipccall(tcp)) {
72 tprint_msgsnd(tcp, tcp->u_arg[3], tcp->u_arg[1],
73 tcp->u_arg[2]);
74 } else {
75 tprint_msgsnd(tcp, tcp->u_arg[1], tcp->u_arg[2],
76 tcp->u_arg[3]);
77 }
78 return RVAL_DECODED;
79 }
80
81 static void
tprint_msgrcv(struct tcb * const tcp,const kernel_ulong_t addr,const kernel_ulong_t count,const kernel_ulong_t msgtyp)82 tprint_msgrcv(struct tcb *const tcp, const kernel_ulong_t addr,
83 const kernel_ulong_t count, const kernel_ulong_t msgtyp)
84 {
85 tprint_msgbuf(tcp, addr, count);
86 tprintf("%" PRI_kld ", ", msgtyp);
87 }
88
89 static int
fetch_msgrcv_args(struct tcb * const tcp,const kernel_ulong_t addr,kernel_ulong_t * const pair)90 fetch_msgrcv_args(struct tcb *const tcp, const kernel_ulong_t addr,
91 kernel_ulong_t *const pair)
92 {
93 if (current_wordsize == sizeof(*pair)) {
94 if (umoven_or_printaddr(tcp, addr, 2 * sizeof(*pair), pair))
95 return -1;
96 } else {
97 unsigned int tmp[2];
98
99 if (umove_or_printaddr(tcp, addr, &tmp))
100 return -1;
101 pair[0] = tmp[0];
102 pair[1] = tmp[1];
103 }
104 return 0;
105 }
106
SYS_FUNC(msgrcv)107 SYS_FUNC(msgrcv)
108 {
109 if (entering(tcp)) {
110 tprintf("%d, ", (int) tcp->u_arg[0]);
111 } else {
112 if (indirect_ipccall(tcp)) {
113 const bool direct =
114 #ifdef SPARC64
115 current_wordsize == 8 ||
116 #endif
117 get_tcb_priv_ulong(tcp) != 0;
118 if (direct) {
119 tprint_msgrcv(tcp, tcp->u_arg[3],
120 tcp->u_arg[1], tcp->u_arg[4]);
121 } else {
122 kernel_ulong_t pair[2];
123
124 if (fetch_msgrcv_args(tcp, tcp->u_arg[3], pair))
125 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
126 else
127 tprint_msgrcv(tcp, pair[0],
128 tcp->u_arg[1], pair[1]);
129 }
130 printflags(ipc_msg_flags, tcp->u_arg[2], "MSG_???");
131 } else {
132 tprint_msgrcv(tcp, tcp->u_arg[1],
133 tcp->u_arg[2], tcp->u_arg[3]);
134 printflags(ipc_msg_flags, tcp->u_arg[4], "MSG_???");
135 }
136 }
137 return 0;
138 }
139