1/*
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() {
35    __builtin_memset(this, 0, sizeof(*this));
36  }
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
53