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

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_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	*
43866e37	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
43866e37 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
43866e37 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1992, 1993 NeXT Computer, Inc.
1c79356b A	27	*/
	28
	29	#ifndef _PPC_SIGNAL_
	30	#define _PPC_SIGNAL_ 1
	31
9bccf70c A	32	#include <sys/appleapiopts.h>
	33
	34	#ifdef __APPLE_API_OBSOLETE
1c79356b A	35	typedef int sig_atomic_t;
	36
	37	/*
	38	* Machine-dependant flags used in sigvec call.
	39	*/
	40	#define SV_SAVE_REGS 0x1000 /* Save all regs in sigcontext */
	41
	42	/*
	43	* regs_saved_t -- Describes which registers beyond what the kernel cares
	44	* about are saved to and restored from this sigcontext.
	45	*
	46	* The default is REGS_SAVED_CALLER, only the caller saved registers
	47	* are saved. If the SV_SAVE_REGS flag was set when the signal
	48	* handler was registered with sigvec() then all the registers will be
	49	* saved in the sigcontext, and REGS_SAVED_ALL will be set. The C
	50	* library uses REGS_SAVED_NONE in order to quickly restore kernel
	51	* state during a longjmp().
	52	*/
	53	typedef enum {
	54	REGS_SAVED_NONE, /* Only kernel managed regs restored */
	55	REGS_SAVED_CALLER, /* "Caller saved" regs: rpc, a0-a7,
	56	t0-t4, at, lk0-lk1, xt1-xt20,
	57	xr0-xr1 */
	58	REGS_SAVED_ALL /* All registers */
	59	} regs_saved_t;
	60
	61
	62	/*
	63	* Information pushed on stack when a signal is delivered.
	64	* This is used by the kernel to restore state following
	65	* execution of the signal handler. It is also made available
	66	* to the handler to allow it to properly restore state if
	67	* a non-standard exit is performed.
	68	*/
	69	struct sigcontext {
	70	int sc_onstack; /* sigstack state to restore */
	71	int sc_mask; /* signal mask to restore */
	72	int sc_ir; /* pc */
	73	int sc_psw; /* processor status word */
	74	int sc_sp; /* stack pointer if sc_regs == NULL */
	75	void sc_regs; / (kernel private) saved state */
	76	};
	77
9bccf70c A	78	#endif /* __APPLE_API_OBSOLETE */
9bccf70c A	79
1c79356b A	80	#endif /* _PPC_SIGNAL_ */
1c79356b A	81