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
36 #ifdef HAVE_SYS_SHM_H
37 # include <sys/shm.h>
38 #elif defined HAVE_LINUX_SHM_H
39 # include <linux/shm.h>
40 #endif
41
42 #ifndef SHM_HUGE_SHIFT
43 # define SHM_HUGE_SHIFT 26
44 #endif
45
46 #ifndef SHM_HUGE_MASK
47 # define SHM_HUGE_MASK 0x3f
48 #endif
49
50 #include "xlat/shm_resource_flags.h"
51 #include "xlat/shm_flags.h"
52
SYS_FUNC(shmget)53 SYS_FUNC(shmget)
54 {
55 printxval(ipc_private, (unsigned int) tcp->u_arg[0], NULL);
56 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
57
58 unsigned int flags = tcp->u_arg[2] & ~0777;
59 const unsigned int mask = SHM_HUGE_MASK << SHM_HUGE_SHIFT;
60 const unsigned int hugetlb_value = flags & mask;
61
62 flags &= ~mask;
63 if (flags || !hugetlb_value)
64 printflags(shm_resource_flags, flags, NULL);
65
66 if (hugetlb_value) {
67 tprintf("%s%u<<",
68 flags ? "|" : "",
69 hugetlb_value >> SHM_HUGE_SHIFT);
70 print_xlat_u(SHM_HUGE_SHIFT);
71 }
72
73 if (flags || hugetlb_value)
74 tprints("|");
75 print_numeric_umode_t(tcp->u_arg[2] & 0777);
76
77 return RVAL_DECODED;
78 }
79
SYS_FUNC(shmat)80 SYS_FUNC(shmat)
81 {
82 if (entering(tcp)) {
83 tprintf("%d, ", (int) tcp->u_arg[0]);
84 if (indirect_ipccall(tcp)) {
85 printaddr(tcp->u_arg[3]);
86 tprints(", ");
87 printflags(shm_flags, tcp->u_arg[1], "SHM_???");
88 } else {
89 printaddr(tcp->u_arg[1]);
90 tprints(", ");
91 printflags(shm_flags, tcp->u_arg[2], "SHM_???");
92 }
93 return 0;
94 } else {
95 if (syserror(tcp))
96 return 0;
97 if (indirect_ipccall(tcp)) {
98 union {
99 uint64_t r64;
100 uint32_t r32;
101 } u;
102 if (umoven(tcp, tcp->u_arg[2], current_wordsize, &u) < 0)
103 return RVAL_NONE;
104 tcp->u_rval = (sizeof(u.r32) == current_wordsize)
105 ? u.r32 : u.r64;
106 }
107 return RVAL_HEX;
108 }
109 }
110
SYS_FUNC(shmdt)111 SYS_FUNC(shmdt)
112 {
113 printaddr(tcp->u_arg[indirect_ipccall(tcp) ? 3 : 0]);
114 return RVAL_DECODED;
115 }
116