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/*
* Copyright (C) 2018 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include <limits.h>
#include <sys/cdefs.h>
#include <sys/types.h>
/* For 64-bit, the kernel's struct sigaction doesn't match the POSIX one,
* so we need to expose our own and translate behind the scenes.
* For 32-bit, we're stuck with the definitions we already shipped,
* even though they contain a sigset_t that's too small. See sigaction64.
*/
#define sigaction __kernel_sigaction
#include <linux/signal.h>
#undef sigaction
/* The arm and x86 kernel header files don't define _NSIG. */
#ifndef _KERNEL__NSIG
#define _KERNEL__NSIG 64
#endif
/* Userspace's NSIG is the kernel's _NSIG + 1. */
#define _NSIG (_KERNEL__NSIG + 1)
#define NSIG _NSIG
typedef int sig_atomic_t;
typedef __sighandler_t sig_t; /* BSD compatibility. */
typedef __sighandler_t sighandler_t; /* glibc compatibility. */
/* sigset_t is already large enough on LP64, but LP32's sigset_t
* is just `unsigned long`.
*/
#if defined(__LP64__)
typedef sigset_t sigset64_t;
#else
typedef struct { unsigned long __bits[_KERNEL__NSIG/(8*sizeof(long))]; } sigset64_t;
#endif
#if defined(__LP64__)
#define __SIGACTION_BODY \
int sa_flags; \
union { \
sighandler_t sa_handler; \
void (*sa_sigaction)(int, struct siginfo*, void*); \
}; \
sigset_t sa_mask; \
void (*sa_restorer)(void); \
struct sigaction { __SIGACTION_BODY };
struct sigaction64 { __SIGACTION_BODY };
#undef __SIGACTION_BODY
#else
#undef sa_handler
#undef sa_sigaction
struct sigaction {
union {
sighandler_t sa_handler;
void (*sa_sigaction)(int, struct siginfo*, void*);
};
sigset_t sa_mask;
int sa_flags;
void (*sa_restorer)(void);
};
/* This matches the kernel's internal structure. */
struct sigaction64 {
union {
sighandler_t sa_handler;
void (*sa_sigaction)(int, struct siginfo*, void*);
};
int sa_flags;
void (*sa_restorer)(void);
sigset64_t sa_mask;
};
#endif
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