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Elliott Hughesc5d028f2013-01-10 14:42:14 -08001/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef LIBC_PRIVATE_KERNEL_SIGSET_T_H_
18#define LIBC_PRIVATE_KERNEL_SIGSET_T_H_
19
20// Our sigset_t is wrong for ARM and x86. It's 32-bit but the kernel expects 64 bits.
21// This means we can't support real-time signals correctly until we can change the ABI.
22// In the meantime, we can use this union to pass an appropriately-sized block of memory
23// to the kernel, at the cost of not being able to refer to real-time signals.
24union kernel_sigset_t {
25 kernel_sigset_t() {
26 clear();
27 }
28
29 kernel_sigset_t(const sigset_t* value) {
30 clear();
31 set(value);
32 }
33
34 void clear() {
Elliott Hughes11952072013-10-24 15:15:14 -070035 __builtin_memset(this, 0, sizeof(*this));
Elliott Hughesc5d028f2013-01-10 14:42:14 -080036 }
37
38 void set(const sigset_t* value) {
39 bionic = *value;
40 }
41
42 sigset_t* get() {
43 return &bionic;
44 }
45
46 sigset_t bionic;
47#ifndef __mips__
48 uint32_t kernel[2];
49#endif
50};
51
52#endif