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

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1992, 1993 NeXT Computer, Inc.
 */

#ifndef	_PPC_SIGNAL_
#define	_PPC_SIGNAL_ 1

#include <sys/appleapiopts.h>

#ifdef __APPLE_API_OBSOLETE
typedef int sig_atomic_t; 

/*
 * Machine-dependant flags used in sigvec call.
 */
#define	SV_SAVE_REGS	0x1000	/* Save all regs in sigcontext */

/*
 * regs_saved_t -- Describes which registers beyond what the kernel cares
 *		   about are saved to and restored from this sigcontext.
 *
 * The default is REGS_SAVED_CALLER, only the caller saved registers
 * are saved.  If the SV_SAVE_REGS flag was set when the signal
 * handler was registered with sigvec() then all the registers will be
 * saved in the sigcontext, and REGS_SAVED_ALL will be set.  The C
 * library uses REGS_SAVED_NONE in order to quickly restore kernel
 * state during a longjmp().
 */
typedef enum {
	REGS_SAVED_NONE,		/* Only kernel managed regs restored */
	REGS_SAVED_CALLER,		/* "Caller saved" regs: rpc, a0-a7,
					   t0-t4, at, lk0-lk1, xt1-xt20,
					   xr0-xr1 */
	REGS_SAVED_ALL			/* All registers */
} regs_saved_t;


/*
 * Information pushed on stack when a signal is delivered.
 * This is used by the kernel to restore state following
 * execution of the signal handler.  It is also made available
 * to the handler to allow it to properly restore state if
 * a non-standard exit is performed.
 */
struct sigcontext {
    int		sc_onstack;     /* sigstack state to restore */
    int		sc_mask;        /* signal mask to restore */
	int		sc_ir;			/* pc */
    int		sc_psw;         /* processor status word */
    int		sc_sp;      	/* stack pointer if sc_regs == NULL */
	void	*sc_regs;		/* (kernel private) saved state */
};

#endif /* __APPLE_API_OBSOLETE */

#endif /* _PPC_SIGNAL_ */
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1992, 1993 NeXT Computer, Inc.
1c79356b A	24	*/
	25
	26	#ifndef _PPC_SIGNAL_
	27	#define _PPC_SIGNAL_ 1
	28
9bccf70c A	29	#include <sys/appleapiopts.h>
	30
	31	#ifdef __APPLE_API_OBSOLETE
1c79356b A	32	typedef int sig_atomic_t;
	33
	34	/*
	35	* Machine-dependant flags used in sigvec call.
	36	*/
	37	#define SV_SAVE_REGS 0x1000 /* Save all regs in sigcontext */
	38
	39	/*
	40	* regs_saved_t -- Describes which registers beyond what the kernel cares
	41	* about are saved to and restored from this sigcontext.
	42	*
	43	* The default is REGS_SAVED_CALLER, only the caller saved registers
	44	* are saved. If the SV_SAVE_REGS flag was set when the signal
	45	* handler was registered with sigvec() then all the registers will be
	46	* saved in the sigcontext, and REGS_SAVED_ALL will be set. The C
	47	* library uses REGS_SAVED_NONE in order to quickly restore kernel
	48	* state during a longjmp().
	49	*/
	50	typedef enum {
	51	REGS_SAVED_NONE, /* Only kernel managed regs restored */
	52	REGS_SAVED_CALLER, /* "Caller saved" regs: rpc, a0-a7,
	53	t0-t4, at, lk0-lk1, xt1-xt20,
	54	xr0-xr1 */
	55	REGS_SAVED_ALL /* All registers */
	56	} regs_saved_t;
	57
	58
	59	/*
	60	* Information pushed on stack when a signal is delivered.
	61	* This is used by the kernel to restore state following
	62	* execution of the signal handler. It is also made available
	63	* to the handler to allow it to properly restore state if
	64	* a non-standard exit is performed.
	65	*/
	66	struct sigcontext {
	67	int sc_onstack; /* sigstack state to restore */
	68	int sc_mask; /* signal mask to restore */
	69	int sc_ir; /* pc */
	70	int sc_psw; /* processor status word */
	71	int sc_sp; /* stack pointer if sc_regs == NULL */
	72	void sc_regs; / (kernel private) saved state */
	73	};
	74
9bccf70c A	75	#endif /* __APPLE_API_OBSOLETE */
9bccf70c A	76
1c79356b A	77	#endif /* _PPC_SIGNAL_ */
1c79356b A	78