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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
     23 /*	  All Rights Reserved  	*/
     24 
     25 
     26 /*
     27  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
     28  * Use is subject to license terms.
     29  */
     30 
     31 #ifndef _SYS_UCONTEXT_H
     32 #define	_SYS_UCONTEXT_H
     33 
     34 #pragma ident	"%Z%%M%	%I%	%E% SMI"	/* from SVr4.0 1.10 */
     35 
     36 #include <sys/feature_tests.h>
     37 
     38 #include <sys/types.h>
     39 #include <sys/regset.h>
     40 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
     41 #include <sys/signal.h>
     42 #endif
     43 
     44 #ifdef	__cplusplus
     45 extern "C" {
     46 #endif
     47 
     48 /*
     49  * Inclusion of <sys/signal.h> for sigset_t and stack_t definitions
     50  * breaks XPG4v2 namespace.  Therefore we must duplicate the defines
     51  * for these types here when _XPG4_2 is defined.
     52  */
     53 
     54 #if defined(_XPG4_2) && !defined(__EXTENSIONS__)
     55 #ifndef	_SIGSET_T
     56 #define	_SIGSET_T
     57 typedef	struct {	/* signal set type */
     58 	unsigned int	__sigbits[4];
     59 } sigset_t;
     60 #endif /* _SIGSET_T */
     61 
     62 #ifndef	_STACK_T
     63 #define	_STACK_T
     64 typedef	struct {
     65 	void	*ss_sp;
     66 	size_t	ss_size;
     67 	int	ss_flags;
     68 } stack_t;
     69 
     70 #endif /* _STACK_T */
     71 #endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */
     72 
     73 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
     74 typedef	struct ucontext ucontext_t;
     75 #else
     76 typedef	struct __ucontext ucontext_t;
     77 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
     78 
     79 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
     80 struct	ucontext {
     81 #else
     82 struct	__ucontext {
     83 #endif
     84 	uint_t		uc_flags;
     85 	ucontext_t	*uc_link;
     86 	sigset_t   	uc_sigmask;
     87 	stack_t 	uc_stack;
     88 	mcontext_t	uc_mcontext;
     89 #ifdef	__sparcv9
     90 	long		uc_filler[4];
     91 #else	/* __sparcv9 */
     92 	long		uc_filler[23];
     93 #endif	/* __sparcv9 */
     94 };
     95 
     96 #ifdef _SYSCALL32
     97 
     98 /* Kernel view of user ILP32 ucontext structure */
     99 
    100 typedef struct ucontext32 {
    101 	uint32_t	uc_flags;
    102 	caddr32_t	uc_link;
    103 	sigset32_t	uc_sigmask;
    104 	stack32_t	uc_stack;
    105 	mcontext32_t	uc_mcontext;
    106 	int32_t		uc_filler[23];
    107 } ucontext32_t;
    108 
    109 #ifdef _KERNEL
    110 extern void ucontext_32ton(const ucontext32_t *, ucontext_t *,
    111     const struct fq32 *, struct fq *);
    112 extern void fpuregset_nto32(const fpregset_t *, fpregset32_t *, struct fq32 *);
    113 #endif
    114 
    115 #endif	/* _SYSCALL32 */
    116 
    117 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
    118 #define	GETCONTEXT	0
    119 #define	SETCONTEXT	1
    120 #define	GETUSTACK	2
    121 #define	SETUSTACK	3
    122 
    123 /*
    124  * values for uc_flags
    125  * these are implementation dependent flags, that should be hidden
    126  * from the user interface, defining which elements of ucontext
    127  * are valid, and should be restored on call to setcontext
    128  */
    129 
    130 #define	UC_SIGMASK	0x01
    131 #define	UC_STACK	0x02
    132 #define	UC_CPU		0x04
    133 #define	UC_MAU		0x08
    134 #define	UC_FPU		UC_MAU
    135 #define	UC_INTR		0x10
    136 #define	UC_ASR		0x20
    137 
    138 #define	UC_MCONTEXT	(UC_CPU|UC_FPU|UC_ASR)
    139 
    140 /*
    141  * UC_ALL specifies the default context
    142  */
    143 
    144 #define	UC_ALL		(UC_SIGMASK|UC_STACK|UC_MCONTEXT)
    145 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
    146 
    147 #ifdef _KERNEL
    148 extern void savecontext(ucontext_t *, k_sigset_t);
    149 extern void restorecontext(ucontext_t *);
    150 
    151 #ifdef _SYSCALL32
    152 extern void savecontext32(ucontext32_t *, k_sigset_t, struct fq32 *);
    153 #endif
    154 #endif
    155 
    156 #ifdef	__cplusplus
    157 }
    158 #endif
    159 
    160 #endif /* _SYS_UCONTEXT_H */
    161