[apple/xnu.git] / bsd / sys / signal.h

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1982, 1986, 1989, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	@(#)signal.h	8.2 (Berkeley) 1/21/94
 */

#ifndef	_SYS_SIGNAL_H_
#define	_SYS_SIGNAL_H_

#include <sys/cdefs.h>
#include <sys/appleapiopts.h>

#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
#define NSIG	32		/* counting 0; could be 33 (mask is 1-32) */
#endif

#include <machine/signal.h>	/* sigcontext; codes for SIGILL, SIGFPE */

#define	SIGHUP	1	/* hangup */
#define	SIGINT	2	/* interrupt */
#define	SIGQUIT	3	/* quit */
#define	SIGILL	4	/* illegal instruction (not reset when caught) */
#define	SIGTRAP	5	/* trace trap (not reset when caught) */
#define	SIGABRT	6	/* abort() */
#if  defined(_POSIX_C_SOURCE)
#define	SIGPOLL	7	/* pollable event ([XSR] generated, not supported) */
#else	/* !_POSIX_C_SOURCE */
#define	SIGIOT	SIGABRT	/* compatibility */
#define	SIGEMT	7	/* EMT instruction */
#endif	/* !_POSIX_C_SOURCE */
#define	SIGFPE	8	/* floating point exception */
#define	SIGKILL	9	/* kill (cannot be caught or ignored) */
#define	SIGBUS	10	/* bus error */
#define	SIGSEGV	11	/* segmentation violation */
#define	SIGSYS	12	/* bad argument to system call */
#define	SIGPIPE	13	/* write on a pipe with no one to read it */
#define	SIGALRM	14	/* alarm clock */
#define	SIGTERM	15	/* software termination signal from kill */
#define	SIGURG	16	/* urgent condition on IO channel */
#define	SIGSTOP	17	/* sendable stop signal not from tty */
#define	SIGTSTP	18	/* stop signal from tty */
#define	SIGCONT	19	/* continue a stopped process */
#define	SIGCHLD	20	/* to parent on child stop or exit */
#define	SIGTTIN	21	/* to readers pgrp upon background tty read */
#define	SIGTTOU	22	/* like TTIN for output if (tp->t_local&LTOSTOP) */
#if  !defined(_POSIX_C_SOURCE)
#define	SIGIO	23	/* input/output possible signal */
#endif
#define	SIGXCPU	24	/* exceeded CPU time limit */
#define	SIGXFSZ	25	/* exceeded file size limit */
#define	SIGVTALRM 26	/* virtual time alarm */
#define	SIGPROF	27	/* profiling time alarm */
#if  !defined(_POSIX_C_SOURCE)
#define SIGWINCH 28	/* window size changes */
#define SIGINFO	29	/* information request */
#endif
#define SIGUSR1 30	/* user defined signal 1 */
#define SIGUSR2 31	/* user defined signal 2 */

#if defined(_ANSI_SOURCE) || defined(_POSIX_C_SOURCE) || defined(__cplusplus)
/*
 * Language spec sez we must list exactly one parameter, even though we
 * actually supply three.  Ugh!
 * SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h>
 */
#define	SIG_DFL		(void (*)(int))0
#define	SIG_IGN		(void (*)(int))1
#define	SIG_HOLD	(void (*)(int))5
#define	SIG_ERR		((void (*)(int))-1)
#else
/* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */
#define	SIG_DFL		(void (*)(/*int*/))0
#define	SIG_IGN		(void (*)(/*int*/))1
#define	SIG_HOLD	(void (*)(/*int*/))5
#define	SIG_ERR		((void (*)(/*int*/))-1)
#endif

#ifndef _ANSI_SOURCE
#include <sys/_types.h>

#ifndef _MCONTEXT_T
#define _MCONTEXT_T
typedef __darwin_mcontext_t		mcontext_t;
#endif

#ifndef _POSIX_C_SOURCE
#ifndef _MCONTEXT64_T
#define _MCONTEXT64_T
typedef __darwin_mcontext64_t		mcontext64_t;
#endif
#endif /* _POSIX_C_SOURCE */

#ifndef _PID_T
#define _PID_T
typedef __darwin_pid_t			pid_t;
#endif

#ifndef _PTHREAD_ATTR_T
#define _PTHREAD_ATTR_T
typedef __darwin_pthread_attr_t		pthread_attr_t;
#endif

#ifndef _SIGSET_T
#define _SIGSET_T
typedef __darwin_sigset_t		sigset_t;
#endif

#ifndef	_SIZE_T
#define	_SIZE_T
typedef	__darwin_size_t			size_t;
#endif

#ifndef _UCONTEXT_T
#define _UCONTEXT_T
typedef __darwin_ucontext_t		ucontext_t;
#endif

#ifndef _POSIX_C_SOURCE
#ifndef _UCONTEXT64_T
#define _UCONTEXT64_T
typedef __darwin_ucontext64_t		ucontext64_t;
#endif
#endif /* _POSIX_C_SOURCE */

#ifndef _UID_T
#define _UID_T
typedef __darwin_uid_t			uid_t;
#endif

union sigval {
	/* Members as suggested by Annex C of POSIX 1003.1b. */
	int	sival_int;
	void	*sival_ptr;
};

#define	SIGEV_NONE	0		/* No async notification */
#define	SIGEV_SIGNAL	1		/* aio - completion notification */
#define SIGEV_THREAD	3		/* A notification function will be called to perform notification */

struct sigevent {
	int				sigev_notify;				/* Notification type */
	int				sigev_signo;				/* Signal number */
	union sigval	sigev_value;				/* Signal value */
	void			(*sigev_notify_function)(union sigval);	  /* Notification function */
	pthread_attr_t	*sigev_notify_attributes;	/* Notification attributes */
};

// LP64todo - should this move?
#ifdef BSD_KERNEL_PRIVATE

union user_sigval {
	struct {
		int		pad;	/* assumes Motorolla byte order */
		int		sival_int;
	} size_equivalent;
	user_addr_t	sival_ptr;
};

struct user_sigevent {
	int		sigev_notify;			/* Notification type */
	int		sigev_signo;			/* Signal number */
	union user_sigval sigev_value;			/* Signal value */
	user_addr_t	sigev_notify_function;	  	/* Notify function */
	user_addr_t 	sigev_notify_attributes;	/* Notify attributes */
};

#endif	/* BSD_KERNEL_PRIVATE */

typedef struct __siginfo {
	int	si_signo;		/* signal number */
	int	si_errno;		/* errno association */
	int	si_code;		/* signal code */
	pid_t	si_pid;			/* sending process */
	uid_t	si_uid;			/* sender's ruid */
	int	si_status;		/* exit value */
	void	*si_addr;		/* faulting instruction */
	union sigval si_value;		/* signal value */
	long	si_band;		/* band event for SIGPOLL */
	unsigned long	pad[7];		/* Reserved for Future Use */
} siginfo_t;

#ifdef BSD_KERNEL_PRIVATE

typedef struct __user_siginfo {
	int		si_signo;	/* signal number */
	int		si_errno;	/* errno association */
	int		si_code;	/* signal code */
	pid_t		si_pid;		/* sending process */
	uid_t		si_uid;		/* sender's ruid */
	int		si_status;	/* exit value */
	user_addr_t	si_addr;	/* faulting instruction */
	union user_sigval si_value;	/* signal value */
	user_long_t	si_band;	/* band event for SIGPOLL */
	user_ulong_t	pad[7];		/* Reserved for Future Use */
} user_siginfo_t;

#endif	/* BSD_KERNEL_PRIVATE */

/* 
 * Incase of SIGILL and SIGFPE, si_addr contains the address of 
 *  faulting instruction.
 * Incase of SIGSEGV and SIGBUS, si_addr contains address of 
 *  faulting memory reference.
 * Incase of SIGCHLD, si_pid willhave child process ID,
 *  si_status will contain exit value or signal.
 *  si_uid contains real user ID of the process that sent the signal
 */

/* Values for si_code */

/* Codes for SIGILL */
#ifndef _POSIX_C_SOURCE
#define	ILL_NOOP	0	/* if only I knew... */
#endif
#define	ILL_ILLOPC	1	/* [XSI] illegal opcode */
#define	ILL_ILLTRP	2	/* [XSI] illegal trap */
#define	ILL_PRVOPC	3	/* [XSI] privileged opcode */
#define	ILL_ILLOPN	4	/* [XSI] illegal operand -NOTIMP */
#define	ILL_ILLADR	5	/* [XSI] illegal addressing mode -NOTIMP */
#define	ILL_PRVREG	6	/* [XSI] privileged register -NOTIMP */
#define	ILL_COPROC	7	/* [XSI] coprocessor error -NOTIMP */
#define	ILL_BADSTK	8	/* [XSI] internal stack error -NOTIMP */

/* Codes for SIGFPE */
#ifndef _POSIX_C_SOURCE
#define	FPE_NOOP	0	/* if only I knew... */
#endif
#define FPE_FLTDIV	1	/* [XSI] floating point divide by zero */
#define FPE_FLTOVF	2	/* [XSI] floating point overflow */
#define FPE_FLTUND	3	/* [XSI] floating point underflow */
#define FPE_FLTRES	4	/* [XSI] floating point inexact result */
#define FPE_FLTINV	5	/* [XSI] invalid floating point operation */
#define	FPE_FLTSUB	6	/* [XSI] subscript out of range -NOTIMP */
#define	FPE_INTDIV	7	/* [XSI] integer divide by zero -NOTIMP */
#define	FPE_INTOVF	8	/* [XSI] integer overflow -NOTIMP */

/* Codes for SIGSEGV */
#ifndef _POSIX_C_SOURCE
#define	SEGV_NOOP	0	/* if only I knew... */
#endif
#define	SEGV_MAPERR	1	/* [XSI] address not mapped to object */
#define	SEGV_ACCERR	2	/* [XSI] invalid permission for mapped object */

/* Codes for SIGBUS */
#ifndef _POSIX_C_SOURCE
#define	BUS_NOOP	0	/* if only I knew... */
#endif
#define	BUS_ADRALN	1	/* [XSI] Invalid address alignment */
#define	BUS_ADRERR	2	/* [XSI] Nonexistent physical address -NOTIMP */
#define	BUS_OBJERR	3	/* [XSI] Object-specific HW error - NOTIMP */

/* Codes for SIGTRAP */
#define	TRAP_BRKPT	1	/* [XSI] Process breakpoint -NOTIMP */
#define	TRAP_TRACE	2	/* [XSI] Process trace trap -NOTIMP */

/* Codes for SIGCHLD */
#ifndef _POSIX_C_SOURCE
#define	CLD_NOOP	0	/* if only I knew... */
#endif
#define	CLD_EXITED	1	/* [XSI] child has exited */
#define	CLD_KILLED	2	/* [XSI] terminated abnormally, no core file */
#define	CLD_DUMPED	3	/* [XSI] terminated abnormally, core file */
#define	CLD_TRAPPED	4	/* [XSI] traced child has trapped */
#define	CLD_STOPPED	5	/* [XSI] child has stopped */
#define	CLD_CONTINUED	6	/* [XSI] stopped child has continued */

/* Codes for SIGPOLL */
#define	POLL_IN		1	/* [XSR] Data input available */
#define	POLL_OUT	2	/* [XSR] Output buffers available */
#define	POLL_MSG	3	/* [XSR] Input message available */
#define	POLL_ERR	4	/* [XSR] I/O error */
#define	POLL_PRI	5	/* [XSR] High priority input available */
#define	POLL_HUP	6	/* [XSR] Device disconnected */

/* union for signal handlers */
union __sigaction_u {
	void    (*__sa_handler)(int);
	void    (*__sa_sigaction)(int, struct __siginfo *,
		       void *);
};

/* Signal vector template for Kernel user boundary */
struct	__sigaction {
	union __sigaction_u __sigaction_u;  /* signal handler */
	void    (*sa_tramp)(void *, int, int, siginfo_t *, void *);
	sigset_t sa_mask;		/* signal mask to apply */
	int	sa_flags;		/* see signal options below */
};

/*
 * Signal vector "template" used in sigaction call.
 */
struct	sigaction {
	union __sigaction_u __sigaction_u;  /* signal handler */
	sigset_t sa_mask;		/* signal mask to apply */
	int	sa_flags;		/* see signal options below */
};

#ifdef	BSD_KERNEL_PRIVATE
#include <machine/types.h>

union __user_sigaction_u {
	user_addr_t	__sa_handler;
	user_addr_t	__sa_sigaction;
};

struct	user_sigaction {
	union __user_sigaction_u __sigaction_u;  /* signal handler */
	sigset_t sa_mask;		/* signal mask to apply */
	int	sa_flags;		/* see signal options below */
};

struct	__user_sigaction {
	union __user_sigaction_u __sigaction_u;  /* signal handler */
	user_addr_t	sa_tramp;	/* signal mask to apply */
	sigset_t sa_mask;		/* signal mask to apply */
	int	sa_flags;		/* see signal options below */
};

#undef SIG_DFL
#undef SIG_IGN
#undef SIG_ERR
#define  SIG_DFL	((user_addr_t)0LL)
#define  SIG_IGN	((user_addr_t)1LL)
#define  SIG_ERR	((user_addr_t)-1LL)

#endif	/* BSD_KERNEL_PRIVATE */


/* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
#define	sa_handler	__sigaction_u.__sa_handler
#define	sa_sigaction	__sigaction_u.__sa_sigaction

#define SA_ONSTACK	0x0001	/* take signal on signal stack */
#define SA_RESTART	0x0002	/* restart system on signal return */
#define	SA_DISABLE	0x0004	/* disable taking signals on alternate stack */
#define	SA_RESETHAND	0x0004	/* reset to SIG_DFL when taking signal */
#define SA_NOCLDSTOP	0x0008	/* do not generate SIGCHLD on child stop */
#define	SA_NODEFER	0x0010	/* don't mask the signal we're delivering */
#define	SA_NOCLDWAIT	0x0020	/* don't keep zombies around */
#define	SA_SIGINFO	0x0040	/* signal handler with SA_SIGINFO args */
#ifndef _POSIX_C_SOURCE
#define	SA_USERTRAMP	0x0100	/* do not bounce off kernel's sigtramp */
/* This will provide 64bit register set in a 32bit user address space */
#define	SA_64REGSET	0x0200	/* signal handler with SA_SIGINFO args with 64bit regs information */
#endif /* !_POSIX_C_SOURCE */

/*
 * Flags for sigprocmask:
 */
#define	SIG_BLOCK	1	/* block specified signal set */
#define	SIG_UNBLOCK	2	/* unblock specified signal set */
#define	SIG_SETMASK	3	/* set specified signal set */

/* POSIX 1003.1b required values. */
#define SI_USER		0x10001	/* [CX] signal from kill() */
#define SI_QUEUE	0x10002	/* [CX] signal from sigqueue() */
#define SI_TIMER	0x10003	/* [CX] timer expiration */
#define SI_ASYNCIO	0x10004	/* [CX] aio request completion */
#define SI_MESGQ	0x10005	/* [CX]	from message arrival on empty queue */

#ifndef _POSIX_C_SOURCE
typedef	void (*sig_t)(int);	/* type of signal function */
#endif

/*
 * Structure used in sigaltstack call.
 */
#ifdef	BSD_KERNEL_PRIVATE

struct  user_sigaltstack {
	user_addr_t	ss_sp;		/* signal stack base */
	user_size_t	ss_size;	/* signal stack length */
	int		ss_flags __attribute((aligned(8)));	/* SA_DISABLE and/or SA_ONSTACK */
};

#endif	/* BSD_KERNEL_PRIVATE */

#ifndef _STACK_T
#define _STACK_T
typedef __darwin_stack_t stack_t;
#endif

#define SS_ONSTACK	0x0001	/* take signal on signal stack */
#define	SS_DISABLE	0x0004	/* disable taking signals on alternate stack */
#define	MINSIGSTKSZ	32768	/* (32K)minimum allowable stack */
#define	SIGSTKSZ	131072	/* (128K)recommended stack size */

#ifndef _POSIX_C_SOURCE
/*
 * 4.3 compatibility:
 * Signal vector "template" used in sigvec call.
 */
struct	sigvec {
	void	(*sv_handler)(int);	/* signal handler */
	int	sv_mask;		/* signal mask to apply */
	int	sv_flags;		/* see signal options below */
};

#define SV_ONSTACK	SA_ONSTACK
#define SV_INTERRUPT	SA_RESTART	/* same bit, opposite sense */
#define SV_RESETHAND	SA_RESETHAND
#define SV_NODEFER	SA_NODEFER
#define SV_NOCLDSTOP	SA_NOCLDSTOP
#define SV_SIGINFO	SA_SIGINFO

#define sv_onstack sv_flags	/* isn't compatibility wonderful! */
#endif /* !_POSIX_C_SOURCE */

/*
 * Structure used in sigstack call.
 */
struct	sigstack {
	char	*ss_sp;			/* signal stack pointer */
	int	ss_onstack;		/* current status */
};

#ifndef _POSIX_C_SOURCE
/*
 * Macro for converting signal number to a mask suitable for
 * sigblock().
 */
#define sigmask(m)	(1 << ((m)-1))

#ifdef	BSD_KERNEL_PRIVATE
/*
 *	signals delivered on a per-thread basis.
 */
#define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
		    sigmask(SIGIOT)|sigmask(SIGEMT)|\
		    sigmask(SIGFPE)|sigmask(SIGBUS)|\
		    sigmask(SIGSEGV)|sigmask(SIGSYS)|\
		    sigmask(SIGPIPE))
#endif	/* BSD_KERNEL_PRIVATE */

#define	BADSIG		SIG_ERR

#endif	/* !_POSIX_C_SOURCE */
#endif	/* !_ANSI_SOURCE */

/*
 * For historical reasons; programs expect signal's return value to be
 * defined by <sys/signal.h>.
 */
__BEGIN_DECLS
void	(*signal(int, void (*)(int)))(int);
__END_DECLS
#endif	/* !_SYS_SIGNAL_H_ */
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	29	/*
	30	* Copyright (c) 1982, 1986, 1989, 1991, 1993
	31	* The Regents of the University of California. All rights reserved.
	32	* (c) UNIX System Laboratories, Inc.
	33	* All or some portions of this file are derived from material licensed
	34	* to the University of California by American Telephone and Telegraph
	35	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
	36	* the permission of UNIX System Laboratories, Inc.
	37	*
	38	* Redistribution and use in source and binary forms, with or without
	39	* modification, are permitted provided that the following conditions
	40	* are met:
	41	* 1. Redistributions of source code must retain the above copyright
	42	* notice, this list of conditions and the following disclaimer.
	43	* 2. Redistributions in binary form must reproduce the above copyright
	44	* notice, this list of conditions and the following disclaimer in the
	45	* documentation and/or other materials provided with the distribution.
	46	* 3. All advertising materials mentioning features or use of this software
	47	* must display the following acknowledgement:
	48	* This product includes software developed by the University of
	49	* California, Berkeley and its contributors.
	50	* 4. Neither the name of the University nor the names of its contributors
	51	* may be used to endorse or promote products derived from this software
	52	* without specific prior written permission.
	53	*
	54	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	55	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	56	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	57	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	58	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	59	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	60	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	61	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	62	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	63	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	64	* SUCH DAMAGE.
	65	*
	66	* @(#)signal.h 8.2 (Berkeley) 1/21/94
	67	*/
	68
	69	#ifndef _SYS_SIGNAL_H_
	70	#define _SYS_SIGNAL_H_
	71
91447636	72	#include <sys/cdefs.h>
9bccf70c A	73	#include <sys/appleapiopts.h>
9bccf70c A	74
91447636	75	#if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
1c79356b A	76	#define NSIG 32 /* counting 0; could be 33 (mask is 1-32) */
	77	#endif
	78
	79	#include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
	80
	81	#define SIGHUP 1 /* hangup */
	82	#define SIGINT 2 /* interrupt */
	83	#define SIGQUIT 3 /* quit */
	84	#define SIGILL 4 /* illegal instruction (not reset when caught) */
1c79356b	85	#define SIGTRAP 5 /* trace trap (not reset when caught) */
1c79356b	86	#define SIGABRT 6 /* abort() */
91447636 A	87	#if defined(_POSIX_C_SOURCE)
	88	#define SIGPOLL 7 /* pollable event ([XSR] generated, not supported) */
	89	#else /* !_POSIX_C_SOURCE */
1c79356b A	90	#define SIGIOT SIGABRT /* compatibility */
1c79356b A	91	#define SIGEMT 7 /* EMT instruction */
91447636	92	#endif /* !_POSIX_C_SOURCE */
1c79356b A	93	#define SIGFPE 8 /* floating point exception */
1c79356b A	94	#define SIGKILL 9 /* kill (cannot be caught or ignored) */
1c79356b	95	#define SIGBUS 10 /* bus error */
1c79356b	96	#define SIGSEGV 11 /* segmentation violation */
1c79356b	97	#define SIGSYS 12 /* bad argument to system call */
1c79356b A	98	#define SIGPIPE 13 /* write on a pipe with no one to read it */
	99	#define SIGALRM 14 /* alarm clock */
	100	#define SIGTERM 15 /* software termination signal from kill */
1c79356b	101	#define SIGURG 16 /* urgent condition on IO channel */
1c79356b A	102	#define SIGSTOP 17 /* sendable stop signal not from tty */
	103	#define SIGTSTP 18 /* stop signal from tty */
	104	#define SIGCONT 19 /* continue a stopped process */
	105	#define SIGCHLD 20 /* to parent on child stop or exit */
	106	#define SIGTTIN 21 /* to readers pgrp upon background tty read */
	107	#define SIGTTOU 22 /* like TTIN for output if (tp->t_local&LTOSTOP) */
91447636	108	#if !defined(_POSIX_C_SOURCE)
1c79356b	109	#define SIGIO 23 /* input/output possible signal */
91447636	110	#endif
1c79356b A	111	#define SIGXCPU 24 /* exceeded CPU time limit */
	112	#define SIGXFSZ 25 /* exceeded file size limit */
	113	#define SIGVTALRM 26 /* virtual time alarm */
	114	#define SIGPROF 27 /* profiling time alarm */
91447636	115	#if !defined(_POSIX_C_SOURCE)
1c79356b A	116	#define SIGWINCH 28 /* window size changes */
	117	#define SIGINFO 29 /* information request */
	118	#endif
	119	#define SIGUSR1 30 /* user defined signal 1 */
	120	#define SIGUSR2 31 /* user defined signal 2 */
	121
91447636	122	#if defined(_ANSI_SOURCE) \|\| defined(_POSIX_C_SOURCE) \|\| defined(__cplusplus)
1c79356b A	123	/*
	124	* Language spec sez we must list exactly one parameter, even though we
	125	* actually supply three. Ugh!
91447636	126	* SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h>
1c79356b A	127	*/
	128	#define SIG_DFL (void (*)(int))0
	129	#define SIG_IGN (void (*)(int))1
91447636 A	130	#define SIG_HOLD (void (*)(int))5
91447636 A	131	#define SIG_ERR ((void (*)(int))-1)
1c79356b	132	#else
91447636 A	133	/* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */
	134	#define SIG_DFL (void ()(/int*/))0
	135	#define SIG_IGN (void ()(/int*/))1
	136	#define SIG_HOLD (void ()(/int*/))5
	137	#define SIG_ERR ((void ()(/int*/))-1)
1c79356b A	138	#endif
	139
	140	#ifndef _ANSI_SOURCE
91447636 A	141	#include <sys/_types.h>
	142
	143	#ifndef _MCONTEXT_T
	144	#define _MCONTEXT_T
	145	typedef __darwin_mcontext_t mcontext_t;
	146	#endif
	147
	148	#ifndef _POSIX_C_SOURCE
	149	#ifndef _MCONTEXT64_T
	150	#define _MCONTEXT64_T
	151	typedef __darwin_mcontext64_t mcontext64_t;
	152	#endif
	153	#endif /* _POSIX_C_SOURCE */
	154
	155	#ifndef _PID_T
	156	#define _PID_T
	157	typedef __darwin_pid_t pid_t;
	158	#endif
	159
	160	#ifndef _PTHREAD_ATTR_T
	161	#define _PTHREAD_ATTR_T
	162	typedef __darwin_pthread_attr_t pthread_attr_t;
	163	#endif
	164
	165	#ifndef _SIGSET_T
	166	#define _SIGSET_T
	167	typedef __darwin_sigset_t sigset_t;
	168	#endif
	169
	170	#ifndef _SIZE_T
	171	#define _SIZE_T
	172	typedef __darwin_size_t size_t;
	173	#endif
	174
	175	#ifndef _UCONTEXT_T
	176	#define _UCONTEXT_T
	177	typedef __darwin_ucontext_t ucontext_t;
	178	#endif
55e303ae	179
91447636 A	180	#ifndef _POSIX_C_SOURCE
	181	#ifndef _UCONTEXT64_T
	182	#define _UCONTEXT64_T
	183	typedef __darwin_ucontext64_t ucontext64_t;
	184	#endif
	185	#endif /* _POSIX_C_SOURCE */
	186
	187	#ifndef _UID_T
	188	#define _UID_T
	189	typedef __darwin_uid_t uid_t;
	190	#endif
1c79356b	191
9bccf70c A	192	union sigval {
9bccf70c A	193	/* Members as suggested by Annex C of POSIX 1003.1b. */
91447636 A	194	int sival_int;
91447636 A	195	void *sival_ptr;
9bccf70c A	196	};
9bccf70c A	197
91447636	198	#define SIGEV_NONE 0 /* No async notification */
55e303ae	199	#define SIGEV_SIGNAL 1 /* aio - completion notification */
55e303ae	200	#define SIGEV_THREAD 3 /* A notification function will be called to perform notification */
9bccf70c	201
55e303ae A	202	struct sigevent {
	203	int sigev_notify; /* Notification type */
	204	int sigev_signo; /* Signal number */
	205	union sigval sigev_value; /* Signal value */
	206	void (sigev_notify_function)(union sigval); / Notification function */
	207	pthread_attr_t sigev_notify_attributes; / Notification attributes */
	208	};
	209
91447636 A	210	// LP64todo - should this move?
	211	#ifdef BSD_KERNEL_PRIVATE
	212
91447636 A	213	union user_sigval {
	214	struct {
	215	int pad; /* assumes Motorolla byte order */
	216	int sival_int;
	217	} size_equivalent;
	218	user_addr_t sival_ptr;
	219	};
	220
	221	struct user_sigevent {
	222	int sigev_notify; /* Notification type */
	223	int sigev_signo; /* Signal number */
	224	union user_sigval sigev_value; /* Signal value */
	225	user_addr_t sigev_notify_function; /* Notify function */
	226	user_addr_t sigev_notify_attributes; /* Notify attributes */
	227	};
	228
91447636 A	229	#endif /* BSD_KERNEL_PRIVATE */
91447636 A	230
9bccf70c A	231	typedef struct __siginfo {
	232	int si_signo; /* signal number */
	233	int si_errno; /* errno association */
	234	int si_code; /* signal code */
91447636 A	235	pid_t si_pid; /* sending process */
91447636 A	236	uid_t si_uid; /* sender's ruid */
9bccf70c A	237	int si_status; /* exit value */
	238	void si_addr; / faulting instruction */
	239	union sigval si_value; /* signal value */
	240	long si_band; /* band event for SIGPOLL */
91447636	241	unsigned long pad[7]; /* Reserved for Future Use */
9bccf70c A	242	} siginfo_t;
9bccf70c A	243
91447636 A	244	#ifdef BSD_KERNEL_PRIVATE
91447636 A	245
91447636 A	246	typedef struct __user_siginfo {
	247	int si_signo; /* signal number */
	248	int si_errno; /* errno association */
	249	int si_code; /* signal code */
	250	pid_t si_pid; /* sending process */
	251	uid_t si_uid; /* sender's ruid */
	252	int si_status; /* exit value */
	253	user_addr_t si_addr; /* faulting instruction */
	254	union user_sigval si_value; /* signal value */
	255	user_long_t si_band; /* band event for SIGPOLL */
	256	user_ulong_t pad[7]; /* Reserved for Future Use */
	257	} user_siginfo_t;
	258
91447636 A	259	#endif /* BSD_KERNEL_PRIVATE */
91447636 A	260
9bccf70c A	261	/*
	262	* Incase of SIGILL and SIGFPE, si_addr contains the address of
	263	* faulting instruction.
	264	* Incase of SIGSEGV and SIGBUS, si_addr contains address of
	265	* faulting memory reference.
	266	* Incase of SIGCHLD, si_pid willhave child process ID,
	267	* si_status will contain exit value or signal.
	268	* si_uid contains real user ID of the process that sent the signal
	269	*/
	270
	271	/* Values for si_code */
	272
	273	/* Codes for SIGILL */
91447636	274	#ifndef _POSIX_C_SOURCE
9bccf70c	275	#define ILL_NOOP 0 /* if only I knew... */
91447636 A	276	#endif
	277	#define ILL_ILLOPC 1 /* [XSI] illegal opcode */
	278	#define ILL_ILLTRP 2 /* [XSI] illegal trap */
	279	#define ILL_PRVOPC 3 /* [XSI] privileged opcode */
	280	#define ILL_ILLOPN 4 /* [XSI] illegal operand -NOTIMP */
	281	#define ILL_ILLADR 5 /* [XSI] illegal addressing mode -NOTIMP */
	282	#define ILL_PRVREG 6 /* [XSI] privileged register -NOTIMP */
	283	#define ILL_COPROC 7 /* [XSI] coprocessor error -NOTIMP */
	284	#define ILL_BADSTK 8 /* [XSI] internal stack error -NOTIMP */
9bccf70c A	285
9bccf70c A	286	/* Codes for SIGFPE */
91447636	287	#ifndef _POSIX_C_SOURCE
9bccf70c	288	#define FPE_NOOP 0 /* if only I knew... */
91447636 A	289	#endif
	290	#define FPE_FLTDIV 1 /* [XSI] floating point divide by zero */
	291	#define FPE_FLTOVF 2 /* [XSI] floating point overflow */
	292	#define FPE_FLTUND 3 /* [XSI] floating point underflow */
	293	#define FPE_FLTRES 4 /* [XSI] floating point inexact result */
	294	#define FPE_FLTINV 5 /* [XSI] invalid floating point operation */
	295	#define FPE_FLTSUB 6 /* [XSI] subscript out of range -NOTIMP */
	296	#define FPE_INTDIV 7 /* [XSI] integer divide by zero -NOTIMP */
	297	#define FPE_INTOVF 8 /* [XSI] integer overflow -NOTIMP */
9bccf70c A	298
9bccf70c A	299	/* Codes for SIGSEGV */
91447636	300	#ifndef _POSIX_C_SOURCE
9bccf70c	301	#define SEGV_NOOP 0 /* if only I knew... */
91447636 A	302	#endif
	303	#define SEGV_MAPERR 1 /* [XSI] address not mapped to object */
	304	#define SEGV_ACCERR 2 /* [XSI] invalid permission for mapped object */
9bccf70c A	305
9bccf70c A	306	/* Codes for SIGBUS */
91447636	307	#ifndef _POSIX_C_SOURCE
9bccf70c	308	#define BUS_NOOP 0 /* if only I knew... */
91447636 A	309	#endif
	310	#define BUS_ADRALN 1 /* [XSI] Invalid address alignment */
	311	#define BUS_ADRERR 2 /* [XSI] Nonexistent physical address -NOTIMP */
	312	#define BUS_OBJERR 3 /* [XSI] Object-specific HW error - NOTIMP */
	313
	314	/* Codes for SIGTRAP */
	315	#define TRAP_BRKPT 1 /* [XSI] Process breakpoint -NOTIMP */
	316	#define TRAP_TRACE 2 /* [XSI] Process trace trap -NOTIMP */
9bccf70c A	317
9bccf70c A	318	/* Codes for SIGCHLD */
91447636	319	#ifndef _POSIX_C_SOURCE
9bccf70c	320	#define CLD_NOOP 0 /* if only I knew... */
91447636 A	321	#endif
	322	#define CLD_EXITED 1 /* [XSI] child has exited */
	323	#define CLD_KILLED 2 /* [XSI] terminated abnormally, no core file */
	324	#define CLD_DUMPED 3 /* [XSI] terminated abnormally, core file */
	325	#define CLD_TRAPPED 4 /* [XSI] traced child has trapped */
	326	#define CLD_STOPPED 5 /* [XSI] child has stopped */
	327	#define CLD_CONTINUED 6 /* [XSI] stopped child has continued */
	328
	329	/* Codes for SIGPOLL */
	330	#define POLL_IN 1 /* [XSR] Data input available */
	331	#define POLL_OUT 2 /* [XSR] Output buffers available */
	332	#define POLL_MSG 3 /* [XSR] Input message available */
	333	#define POLL_ERR 4 /* [XSR] I/O error */
	334	#define POLL_PRI 5 /* [XSR] High priority input available */
	335	#define POLL_HUP 6 /* [XSR] Device disconnected */
9bccf70c A	336
	337	/* union for signal handlers */
	338	union __sigaction_u {
	339	void (*__sa_handler)(int);
	340	void (__sa_sigaction)(int, struct __siginfo ,
	341	void *);
	342	};
	343
	344	/* Signal vector template for Kernel user boundary */
	345	struct __sigaction {
	346	union __sigaction_u __sigaction_u; /* signal handler */
	347	void (sa_tramp)(void , int, int, siginfo_t , void );
	348	sigset_t sa_mask; /* signal mask to apply */
	349	int sa_flags; /* see signal options below */
	350	};
	351
1c79356b A	352	/*
	353	* Signal vector "template" used in sigaction call.
	354	*/
	355	struct sigaction {
9bccf70c	356	union __sigaction_u __sigaction_u; /* signal handler */
1c79356b A	357	sigset_t sa_mask; /* signal mask to apply */
	358	int sa_flags; /* see signal options below */
	359	};
91447636 A	360
	361	#ifdef BSD_KERNEL_PRIVATE
	362	#include <machine/types.h>
	363
91447636 A	364	union __user_sigaction_u {
	365	user_addr_t __sa_handler;
	366	user_addr_t __sa_sigaction;
	367	};
	368
	369	struct user_sigaction {
	370	union __user_sigaction_u __sigaction_u; /* signal handler */
	371	sigset_t sa_mask; /* signal mask to apply */
	372	int sa_flags; /* see signal options below */
	373	};
	374
	375	struct __user_sigaction {
	376	union __user_sigaction_u __sigaction_u; /* signal handler */
	377	user_addr_t sa_tramp; /* signal mask to apply */
	378	sigset_t sa_mask; /* signal mask to apply */
	379	int sa_flags; /* see signal options below */
	380	};
	381
91447636 A	382	#undef SIG_DFL
	383	#undef SIG_IGN
	384	#undef SIG_ERR
	385	#define SIG_DFL ((user_addr_t)0LL)
	386	#define SIG_IGN ((user_addr_t)1LL)
	387	#define SIG_ERR ((user_addr_t)-1LL)
	388
	389	#endif /* BSD_KERNEL_PRIVATE */
	390
	391
9bccf70c A	392	/* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
	393	#define sa_handler __sigaction_u.__sa_handler
	394	#define sa_sigaction __sigaction_u.__sa_sigaction
	395
1c79356b A	396	#define SA_ONSTACK 0x0001 /* take signal on signal stack */
	397	#define SA_RESTART 0x0002 /* restart system on signal return */
	398	#define SA_DISABLE 0x0004 /* disable taking signals on alternate stack */
9bccf70c	399	#define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
91447636	400	#define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
9bccf70c A	401	#define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
	402	#define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */
	403	#define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */
91447636	404	#ifndef _POSIX_C_SOURCE
1c79356b	405	#define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */
55e303ae A	406	/* This will provide 64bit register set in a 32bit user address space */
55e303ae A	407	#define SA_64REGSET 0x0200 /* signal handler with SA_SIGINFO args with 64bit regs information */
91447636	408	#endif /* !_POSIX_C_SOURCE */
1c79356b A	409
	410	/*
	411	* Flags for sigprocmask:
	412	*/
	413	#define SIG_BLOCK 1 /* block specified signal set */
	414	#define SIG_UNBLOCK 2 /* unblock specified signal set */
	415	#define SIG_SETMASK 3 /* set specified signal set */
	416
9bccf70c	417	/* POSIX 1003.1b required values. */
91447636 A	418	#define SI_USER 0x10001 /* [CX] signal from kill() */
	419	#define SI_QUEUE 0x10002 /* [CX] signal from sigqueue() */
	420	#define SI_TIMER 0x10003 /* [CX] timer expiration */
	421	#define SI_ASYNCIO 0x10004 /* [CX] aio request completion */
	422	#define SI_MESGQ 0x10005 /* [CX] from message arrival on empty queue */
	423
	424	#ifndef _POSIX_C_SOURCE
	425	typedef void (sig_t)(int); / type of signal function */
	426	#endif
1c79356b A	427
	428	/*
	429	* Structure used in sigaltstack call.
	430	*/
91447636 A	431	#ifdef BSD_KERNEL_PRIVATE
91447636 A	432
91447636 A	433	struct user_sigaltstack {
	434	user_addr_t ss_sp; /* signal stack base */
	435	user_size_t ss_size; /* signal stack length */
4452a7af	436	int ss_flags __attribute((aligned(8))); /* SA_DISABLE and/or SA_ONSTACK */
1c79356b	437	};
9bccf70c	438
91447636 A	439	#endif /* BSD_KERNEL_PRIVATE */
	440
	441	#ifndef _STACK_T
	442	#define _STACK_T
	443	typedef __darwin_stack_t stack_t;
	444	#endif
9bccf70c A	445
	446	#define SS_ONSTACK 0x0001 /* take signal on signal stack */
	447	#define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
55e303ae A	448	#define MINSIGSTKSZ 32768 /* (32K)minimum allowable stack */
55e303ae A	449	#define SIGSTKSZ 131072 /* (128K)recommended stack size */
1c79356b	450
91447636	451	#ifndef _POSIX_C_SOURCE
1c79356b A	452	/*
	453	* 4.3 compatibility:
	454	* Signal vector "template" used in sigvec call.
	455	*/
	456	struct sigvec {
9bccf70c	457	void (sv_handler)(int); / signal handler */
1c79356b A	458	int sv_mask; /* signal mask to apply */
	459	int sv_flags; /* see signal options below */
	460	};
	461
	462	#define SV_ONSTACK SA_ONSTACK
	463	#define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
9bccf70c A	464	#define SV_RESETHAND SA_RESETHAND
	465	#define SV_NODEFER SA_NODEFER
	466	#define SV_NOCLDSTOP SA_NOCLDSTOP
	467	#define SV_SIGINFO SA_SIGINFO
	468
1c79356b	469	#define sv_onstack sv_flags /* isn't compatibility wonderful! */
91447636	470	#endif /* !_POSIX_C_SOURCE */
1c79356b A	471
	472	/*
	473	* Structure used in sigstack call.
	474	*/
	475	struct sigstack {
	476	char ss_sp; / signal stack pointer */
	477	int ss_onstack; /* current status */
	478	};
	479
91447636	480	#ifndef _POSIX_C_SOURCE
1c79356b A	481	/*
	482	* Macro for converting signal number to a mask suitable for
	483	* sigblock().
	484	*/
	485	#define sigmask(m) (1 << ((m)-1))
	486
91447636	487	#ifdef BSD_KERNEL_PRIVATE
9bccf70c A	488	/*
	489	* signals delivered on a per-thread basis.
	490	*/
	491	#define threadmask (sigmask(SIGILL)\|sigmask(SIGTRAP)\|\
	492	sigmask(SIGIOT)\|sigmask(SIGEMT)\|\
	493	sigmask(SIGFPE)\|sigmask(SIGBUS)\|\
	494	sigmask(SIGSEGV)\|sigmask(SIGSYS)\|\
	495	sigmask(SIGPIPE))
91447636	496	#endif /* BSD_KERNEL_PRIVATE */
1c79356b A	497
	498	#define BADSIG SIG_ERR
	499
91447636	500	#endif /* !_POSIX_C_SOURCE */
1c79356b A	501	#endif /* !_ANSI_SOURCE */
	502
	503	/*
	504	* For historical reasons; programs expect signal's return value to be
	505	* defined by <sys/signal.h>.
	506	*/
	507	__BEGIN_DECLS
91447636	508	void (signal(int, void ()(int)))(int);
1c79356b A	509	__END_DECLS
1c79356b A	510	#endif /* !_SYS_SIGNAL_H_ */