/*
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* Copyright (C) 2018 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _BITS_SIGNAL_TYPES_H_
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#define _BITS_SIGNAL_TYPES_H_
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#include <limits.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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/* For 64-bit (and mips), the kernel's struct sigaction doesn't match the
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* POSIX one, so we need to expose our own and translate behind the scenes.
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* For 32-bit, we're stuck with the definitions we already shipped,
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* even though they contain a sigset_t that's too small. See sigaction64.
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*/
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#define sigaction __kernel_sigaction
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#include <linux/signal.h>
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#undef sigaction
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/* The arm and x86 kernel header files don't define _NSIG. */
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#ifndef _KERNEL__NSIG
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#define _KERNEL__NSIG 64
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#endif
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/* Userspace's NSIG is the kernel's _NSIG + 1. */
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#define _NSIG (_KERNEL__NSIG + 1)
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#define NSIG _NSIG
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typedef int sig_atomic_t;
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typedef __sighandler_t sig_t; /* BSD compatibility. */
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typedef __sighandler_t sighandler_t; /* glibc compatibility. */
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/* sigset_t is already large enough on LP64 and mips, but other LP32's sigset_t
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* is just `unsigned long`.
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*/
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#if defined(__LP64__) || defined(__mips__)
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typedef sigset_t sigset64_t;
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#else
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typedef struct { unsigned long __bits[_KERNEL__NSIG/LONG_BIT]; } sigset64_t;
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#endif
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#if defined(__LP64__)
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#define __SIGACTION_BODY \
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int sa_flags; \
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union { \
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sighandler_t sa_handler; \
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void (*sa_sigaction)(int, struct siginfo*, void*); \
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}; \
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sigset_t sa_mask; \
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void (*sa_restorer)(void); \
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struct sigaction { __SIGACTION_BODY };
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struct sigaction64 { __SIGACTION_BODY };
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#undef __SIGACTION_BODY
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#elif defined(__mips__)
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#define __SIGACTION_BODY \
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int sa_flags; \
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union { \
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sighandler_t sa_handler; \
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void (*sa_sigaction)(int, struct siginfo*, void*); \
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}; \
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sigset_t sa_mask; \
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struct sigaction { __SIGACTION_BODY };
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struct sigaction64 { __SIGACTION_BODY };
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#undef __SIGACTION_BODY
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#else
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#undef sa_handler
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#undef sa_sigaction
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struct sigaction {
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union {
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sighandler_t sa_handler;
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void (*sa_sigaction)(int, struct siginfo*, void*);
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};
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sigset_t sa_mask;
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int sa_flags;
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void (*sa_restorer)(void);
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};
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/* This matches the kernel's internal structure. */
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struct sigaction64 {
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union {
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sighandler_t sa_handler;
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void (*sa_sigaction)(int, struct siginfo*, void*);
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};
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int sa_flags;
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void (*sa_restorer)(void);
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sigset64_t sa_mask;
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};
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#endif
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#endif
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