]> granicus.if.org Git - strace/blob - ipc_shm.c
Move string_to_uint* functions to a separate file
[strace] / ipc_shm.c
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 #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 #include "xlat/shm_resource_flags.h"
43 #include "xlat/shm_flags.h"
44
45 SYS_FUNC(shmget)
46 {
47         const int key = (int) tcp->u_arg[0];
48         if (key)
49                 tprintf("%#x", key);
50         else
51                 tprints("IPC_PRIVATE");
52         tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
53         if (printflags(shm_resource_flags, tcp->u_arg[2] & ~0777, NULL) != 0)
54                 tprints("|");
55         print_numeric_umode_t(tcp->u_arg[2] & 0777);
56         return RVAL_DECODED;
57 }
58
59 SYS_FUNC(shmat)
60 {
61         if (entering(tcp)) {
62                 tprintf("%d, ", (int) tcp->u_arg[0]);
63                 if (indirect_ipccall(tcp)) {
64                         printaddr(tcp->u_arg[3]);
65                         tprints(", ");
66                         printflags(shm_flags, tcp->u_arg[1], "SHM_???");
67                 } else {
68                         printaddr(tcp->u_arg[1]);
69                         tprints(", ");
70                         printflags(shm_flags, tcp->u_arg[2], "SHM_???");
71                 }
72                 return 0;
73         } else {
74                 if (syserror(tcp))
75                         return 0;
76                 if (indirect_ipccall(tcp)) {
77                         union {
78                                 uint64_t r64;
79                                 uint32_t r32;
80                         } u;
81                         if (umoven(tcp, tcp->u_arg[2], current_wordsize, &u) < 0)
82                                 return RVAL_NONE;
83                         tcp->u_rval = (sizeof(u.r32) == current_wordsize)
84                                       ? u.r32 : u.r64;
85                 }
86                 return RVAL_HEX;
87         }
88 }
89
90 SYS_FUNC(shmdt)
91 {
92         printaddr(tcp->u_arg[indirect_ipccall(tcp) ? 3 : 0]);
93         return RVAL_DECODED;
94 }