1/*
2 * Copyright (C) 2008 The Android Open Source Project
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 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef _SIGNAL_H_
30#define _SIGNAL_H_
31
32#include <errno.h>
33#include <sys/cdefs.h>
34#include <limits.h>		/* For LONG_BIT */
35#include <string.h>		/* For memset() */
36#include <sys/types.h>
37#include <asm/sigcontext.h>
38
39#if defined(__LP64__) || defined(__mips__)
40/* For 64-bit (and mips), the kernel's struct sigaction doesn't match the POSIX one,
41 * so we need to expose our own and translate behind the scenes. */
42#  define sigaction __kernel_sigaction
43#  include <linux/signal.h>
44#  undef sigaction
45#else
46/* For 32-bit, we're stuck with the definitions we already shipped,
47 * even though they contain a sigset_t that's too small. */
48#  include <linux/signal.h>
49#endif
50
51#include <sys/ucontext.h>
52#define __BIONIC_HAVE_UCONTEXT_T
53
54__BEGIN_DECLS
55
56typedef int sig_atomic_t;
57
58/* The arm and x86 kernel header files don't define _NSIG. */
59#ifndef _KERNEL__NSIG
60#define _KERNEL__NSIG 64
61#endif
62
63/* Userspace's NSIG is the kernel's _NSIG + 1. */
64#define _NSIG (_KERNEL__NSIG + 1)
65#define NSIG _NSIG
66
67/* We take a few real-time signals for ourselves. May as well use the same names as glibc. */
68#define SIGRTMIN (__libc_current_sigrtmin())
69#define SIGRTMAX (__libc_current_sigrtmax())
70extern int __libc_current_sigrtmin(void);
71extern int __libc_current_sigrtmax(void);
72
73extern const char* const sys_siglist[];
74extern const char* const sys_signame[]; /* BSD compatibility. */
75
76typedef __sighandler_t sig_t; /* BSD compatibility. */
77typedef __sighandler_t sighandler_t; /* glibc compatibility. */
78
79#define si_timerid si_tid /* glibc compatibility. */
80
81#if defined(__LP64__)
82
83struct sigaction {
84  unsigned int sa_flags;
85  union {
86    sighandler_t sa_handler;
87    void (*sa_sigaction)(int, struct siginfo*, void*);
88  };
89  sigset_t sa_mask;
90  void (*sa_restorer)(void);
91};
92
93#elif defined(__mips__)
94
95struct sigaction {
96  unsigned int sa_flags;
97  union {
98    sighandler_t sa_handler;
99    void (*sa_sigaction) (int, struct siginfo*, void*);
100  };
101  sigset_t sa_mask;
102};
103
104#endif
105
106extern int sigaction(int, const struct sigaction*, struct sigaction*);
107
108extern sighandler_t signal(int, sighandler_t);
109
110extern int siginterrupt(int, int);
111
112extern int sigaddset(sigset_t*, int);
113extern int sigdelset(sigset_t*, int);
114extern int sigemptyset(sigset_t*);
115extern int sigfillset(sigset_t*);
116extern int sigismember(const sigset_t*, int);
117
118extern int sigpending(sigset_t*) __nonnull((1));
119extern int sigprocmask(int, const sigset_t*, sigset_t*);
120extern int sigsuspend(const sigset_t*) __nonnull((1));
121extern int sigwait(const sigset_t*, int*) __nonnull((1, 2));
122
123extern int raise(int);
124extern int kill(pid_t, int);
125extern int killpg(int, int);
126
127extern int sigaltstack(const stack_t*, stack_t*);
128
129extern void psiginfo(const siginfo_t*, const char*);
130extern void psignal(int, const char*);
131
132__END_DECLS
133
134#endif /* _SIGNAL_H_ */
135