1 /*
2 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "defs.h"
29
30 #include DEF_MPERS_TYPE(struct_msghdr)
31
32 #include "msghdr.h"
33 typedef struct msghdr struct_msghdr;
34
35 #include MPERS_DEFS
36
37 /*
38 * On success, return the number of fetched bytes.
39 * On error, return 0;
40 *
41 * This function cannot use umove_or_printaddr because
42 * it is called by dumpio and therefore cannot print anything.
43 */
44
MPERS_PRINTER_DECL(int,fetch_struct_msghdr,struct tcb * const tcp,const kernel_ulong_t addr,void * const p)45 MPERS_PRINTER_DECL(int, fetch_struct_msghdr,
46 struct tcb *const tcp, const kernel_ulong_t addr,
47 void *const p)
48 {
49 struct msghdr *const p_native = p;
50 struct_msghdr v_compat;
51
52 if (sizeof(*p_native) == sizeof(v_compat))
53 return umove(tcp, addr, p_native) ? 0 : sizeof(*p_native);
54
55 if (umove(tcp, addr, &v_compat))
56 return 0;
57
58 p_native->msg_name = (void *) (unsigned long)
59 v_compat.msg_name;
60
61 p_native->msg_namelen =
62 v_compat.msg_namelen;
63
64 p_native->msg_iov = (void *) (unsigned long)
65 v_compat.msg_iov;
66
67 p_native->msg_iovlen =
68 v_compat.msg_iovlen;
69
70 p_native->msg_control = (void *) (unsigned long)
71 v_compat.msg_control;
72
73 p_native->msg_controllen =
74 v_compat.msg_controllen;
75
76 p_native->msg_flags =
77 v_compat.msg_flags;
78
79 return sizeof(v_compat);
80 }
81