Branch data Line data Source code
1 : : /*
2 : : * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 : : * Copyright (c) 2015-2017 The strace developers.
4 : : * All rights reserved.
5 : : *
6 : : * Redistribution and use in source and binary forms, with or without
7 : : * modification, are permitted provided that the following conditions
8 : : * are met:
9 : : * 1. Redistributions of source code must retain the above copyright
10 : : * notice, this list of conditions and the following disclaimer.
11 : : * 2. Redistributions in binary form must reproduce the above copyright
12 : : * notice, this list of conditions and the following disclaimer in the
13 : : * documentation and/or other materials provided with the distribution.
14 : : * 3. The name of the author may not be used to endorse or promote products
15 : : * derived from this software without specific prior written permission.
16 : : *
17 : : * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 : : * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 : : * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 : : * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 : : * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 : : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 : : * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 : : * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 : : * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 : : * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 : : */
28 : :
29 : : #include "defs.h"
30 : :
31 : : #include DEF_MPERS_TYPE(struct_flock)
32 : : #include DEF_MPERS_TYPE(struct_flock64)
33 : :
34 : : #include "flock.h"
35 : : typedef struct_kernel_flock struct_flock;
36 : : typedef struct_kernel_flock64 struct_flock64;
37 : :
38 : : #include MPERS_DEFS
39 : :
40 : : #define SIZEOF_MEMBER(type, member) \
41 : : sizeof(((type *) NULL)->member)
42 : :
43 : : #define FLOCK_MEMBERS_EQ(type, member) \
44 : : (SIZEOF_MEMBER(struct_kernel_flock64, member) == SIZEOF_MEMBER(type, member) \
45 : : && offsetof(struct_kernel_flock64, member) == offsetof(type, member))
46 : :
47 : : #define FLOCK_STRUCTS_EQ(type) \
48 : : (sizeof(struct_kernel_flock64) == sizeof(type) \
49 : : && FLOCK_MEMBERS_EQ(type, l_type) \
50 : : && FLOCK_MEMBERS_EQ(type, l_whence) \
51 : : && FLOCK_MEMBERS_EQ(type, l_start) \
52 : : && FLOCK_MEMBERS_EQ(type, l_len) \
53 : : && FLOCK_MEMBERS_EQ(type, l_pid))
54 : :
55 : 15 : MPERS_PRINTER_DECL(bool, fetch_struct_flock, struct tcb *const tcp,
56 : : const kernel_ulong_t addr, void *const p)
57 : : {
58 : 15 : struct_kernel_flock64 *pfl = p;
59 : : struct_flock mfl;
60 : :
61 : : if (FLOCK_STRUCTS_EQ(struct_flock))
62 : 5 : return !umove_or_printaddr(tcp, addr, pfl);
63 : :
64 [ + - ]: 10 : if (umove_or_printaddr(tcp, addr, &mfl))
65 : : return false;
66 : :
67 : 10 : pfl->l_type = mfl.l_type;
68 : 10 : pfl->l_whence = mfl.l_whence;
69 : 10 : pfl->l_start = mfl.l_start;
70 : 10 : pfl->l_len = mfl.l_len;
71 : 10 : pfl->l_pid = mfl.l_pid;
72 : 10 : return true;
73 : : }
74 : :
75 : 7 : MPERS_PRINTER_DECL(bool, fetch_struct_flock64, struct tcb *const tcp,
76 : : const kernel_ulong_t addr, void *const p)
77 : : {
78 : 7 : struct_kernel_flock64 *pfl = p;
79 : : struct_flock64 mfl;
80 : :
81 : : if (FLOCK_STRUCTS_EQ(struct_flock64))
82 : 0 : return !umove_or_printaddr(tcp, addr, pfl);
83 : :
84 [ + - ]: 7 : if (umove_or_printaddr(tcp, addr, &mfl))
85 : : return false;
86 : :
87 : 7 : pfl->l_type = mfl.l_type;
88 : 7 : pfl->l_whence = mfl.l_whence;
89 : 7 : pfl->l_start = mfl.l_start;
90 : 7 : pfl->l_len = mfl.l_len;
91 : 7 : pfl->l_pid = mfl.l_pid;
92 : 7 : return true;
93 : : }
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