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fetch_struct_mmsghdr: change address argument type from unsigned long to kernel_ureg_t
[strace] / fetch_struct_mmsghdr.c
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_mmsghdr)
31
32 #include "msghdr.h"
33 typedef struct mmsghdr struct_mmsghdr;
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
45 MPERS_PRINTER_DECL(int, fetch_struct_mmsghdr,
46                    struct tcb *const tcp, const kernel_ureg_t addr,
47                    void *const p)
48 {
49         struct mmsghdr *p_native = p;
50         struct_mmsghdr 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_hdr.msg_name = (void *) (unsigned long)
59          v_compat.msg_hdr.msg_name;
60
61         p_native->msg_hdr.msg_namelen =
62          v_compat.msg_hdr.msg_namelen;
63
64         p_native->msg_hdr.msg_iov = (void *) (unsigned long)
65          v_compat.msg_hdr.msg_iov;
66
67         p_native->msg_hdr.msg_iovlen =
68          v_compat.msg_hdr.msg_iovlen;
69
70         p_native->msg_hdr.msg_control = (void *) (unsigned long)
71          v_compat.msg_hdr.msg_control;
72
73         p_native->msg_hdr.msg_controllen =
74          v_compat.msg_hdr.msg_controllen;
75
76         p_native->msg_hdr.msg_flags =
77          v_compat.msg_hdr.msg_flags;
78
79         p_native->msg_len =
80          v_compat.msg_len;
81
82         return sizeof(v_compat);
83 }
84
85 MPERS_PRINTER_DECL(unsigned int, sizeof_struct_mmsghdr, void)
86 {
87         return sizeof(struct_mmsghdr);
88 }