1 /* EABI unaligned read/write functions.
2
3 Copyright (C) 2005-2020 Free Software Foundation, Inc.
4 Contributed by CodeSourcery, LLC.
5
6 This file is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 3, or (at your option) any
9 later version.
10
11 This file is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
15
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
19
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
24
25 int __aeabi_uread4 (void *);
26 int __aeabi_uwrite4 (int, void *);
27 long long __aeabi_uread8 (void *);
28 long long __aeabi_uwrite8 (long long, void *);
29
30 struct __attribute__((packed)) u4 { int data; };
31 struct __attribute__((packed)) u8 { long long data; };
32
33 int
34 __aeabi_uread4 (void *ptr)
wait_op(func_type func)35 {
36 return ((struct u4 *) ptr)->data;
37 }
38
39 int
40 __aeabi_uwrite4 (int data, void *ptr)
41 {
42 ((struct u4 *) ptr)->data = data;
43 return data;
44 }
45
46 long long
47 __aeabi_uread8 (void *ptr)
48 {
49 return ((struct u8 *) ptr)->data;
50 }
51
52 long long
53 __aeabi_uwrite8 (long long data, void *ptr)
54 {
55 ((struct u8 *) ptr)->data = data;
56 return data;
57 }
58