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
36 #include DEF_MPERS_TYPE(shmid_ds_t)
37
38 #include "ipc_defs.h"
39
40 #ifdef HAVE_SYS_SHM_H
41 /* The C library generally exports the struct the current kernel expects. */
42 # include <sys/shm.h>
43 typedef struct shmid_ds shmid_ds_t;
44 #elif defined HAVE_LINUX_SHM_H
45 /* The linux header might provide the right struct. */
46 # include <linux/shm.h>
47 typedef struct shmid64_ds shmid_ds_t;
48 #endif
49
50 #include MPERS_DEFS
51
52 #include "xlat/shmctl_flags.h"
53
54 static void
print_shmid_ds(struct tcb * const tcp,const kernel_ulong_t addr,int cmd)55 print_shmid_ds(struct tcb *const tcp, const kernel_ulong_t addr, int cmd)
56 {
57 /* TODO: We don't properly decode old compat ipc calls. */
58 if (cmd & IPC_64)
59 cmd &= ~IPC_64;
60 shmid_ds_t shmid_ds;
61 switch (cmd) {
62 case IPC_SET:
63 case IPC_STAT:
64 if (umove_or_printaddr(tcp, addr, &shmid_ds))
65 return;
66
67 tprints("{shm_perm={");
68 printuid("uid=", shmid_ds.shm_perm.uid);
69 printuid(", gid=", shmid_ds.shm_perm.gid);
70 tprints(", mode=");
71 print_numeric_umode_t(shmid_ds.shm_perm.mode);
72
73 if (cmd != IPC_STAT) {
74 tprints("}, ...}");
75 break;
76 }
77
78 tprintf(", key=%u", (unsigned) shmid_ds.shm_perm.__key);
79 printuid(", cuid=", shmid_ds.shm_perm.cuid);
80 printuid(", cgid=", shmid_ds.shm_perm.cgid);
81 tprints("}");
82 tprintf(", shm_segsz=%u", (unsigned) shmid_ds.shm_segsz);
83 tprintf(", shm_cpid=%u", (unsigned) shmid_ds.shm_cpid);
84 tprintf(", shm_lpid=%u", (unsigned) shmid_ds.shm_lpid);
85 tprintf(", shm_nattch=%u", (unsigned) shmid_ds.shm_nattch);
86 tprintf(", shm_atime=%u", (unsigned) shmid_ds.shm_atime);
87 tprintf(", shm_dtime=%u", (unsigned) shmid_ds.shm_dtime);
88 tprintf(", shm_ctime=%u", (unsigned) shmid_ds.shm_ctime);
89 tprints("}");
90 break;
91
92 default:
93 printaddr(addr);
94 break;
95 }
96 }
97
SYS_FUNC(shmctl)98 SYS_FUNC(shmctl)
99 {
100 if (entering(tcp)) {
101 tprintf("%d, ", (int) tcp->u_arg[0]);
102 PRINTCTL(shmctl_flags, tcp->u_arg[1], "SHM_???");
103 tprints(", ");
104 } else {
105 const kernel_ulong_t addr = tcp->u_arg[indirect_ipccall(tcp) ? 3 : 2];
106 print_shmid_ds(tcp, addr, tcp->u_arg[1]);
107 }
108 return 0;
109 }
110