usr/src/uts/sparc/sys/ucontext.h

   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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
  24  *
  25  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28
  29 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  30 /*        All Rights Reserved   */
  31
  32 #ifndef _SYS_UCONTEXT_H
  33 #define _SYS_UCONTEXT_H
  34
  35 #include <sys/feature_tests.h>
  36
  37 #include <sys/types.h>
  38 #include <sys/mcontext.h>
  39 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  40 #include <sys/signal.h>
  41 #endif
  42
  43 #ifdef  __cplusplus
  44 extern "C" {
  45 #endif
  46
  47 /*
  48  * Inclusion of <sys/signal.h> for sigset_t and stack_t definitions
  49  * breaks XPG4v2 namespace.  Therefore we must duplicate the defines
  50  * for these types here when _XPG4_2 is defined.
  51  */
  52
  53 #if defined(_XPG4_2) && !defined(__EXTENSIONS__)
  54 #ifndef _SIGSET_T
  55 #define _SIGSET_T
  56 typedef struct {        /* signal set type */
  57         unsigned int    __sigbits[4];
  58 } sigset_t;
  59 #endif /* _SIGSET_T */
  60
  61 #ifndef _STACK_T
  62 #define _STACK_T
  63 typedef struct {
  64         void    *ss_sp;
  65         size_t  ss_size;
  66         int     ss_flags;
  67 } stack_t;
  68
  69 #endif /* _STACK_T */
  70 #endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */
  71
  72 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  73 typedef struct ucontext ucontext_t;
  74 #else
  75 typedef struct __ucontext ucontext_t;
  76 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
  77
  78 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  79 struct  ucontext {
  80 #else
  81 struct  __ucontext {
  82 #endif
  83         uint_t          uc_flags;
  84         ucontext_t      *uc_link;
  85         sigset_t        uc_sigmask;
  86         stack_t         uc_stack;
  87         mcontext_t      uc_mcontext;
  88 #ifdef  __sparcv9
  89         long            uc_filler[4];
  90 #else   /* __sparcv9 */
  91         long            uc_filler[23];
  92 #endif  /* __sparcv9 */
  93 };
  94
  95 #ifdef _SYSCALL32
  96
  97 /* Kernel view of user ILP32 ucontext structure */
  98
  99 typedef struct ucontext32 {
 100         uint32_t        uc_flags;
 101         caddr32_t       uc_link;
 102         sigset_t        uc_sigmask;
 103         stack32_t       uc_stack;
 104         mcontext32_t    uc_mcontext;
 105         int32_t         uc_filler[23];
 106 } ucontext32_t;
 107
 108 #ifdef _KERNEL
 109 extern void ucontext_32ton(const ucontext32_t *, ucontext_t *,
 110     const struct fq32 *, struct _fq *);
 111 extern void fpuregset_nto32(const fpregset_t *, fpregset32_t *, struct fq32 *);
 112 #endif
 113
 114 #endif  /* _SYSCALL32 */
 115
 116 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
 117 #define GETCONTEXT      0
 118 #define SETCONTEXT      1
 119 #define GETUSTACK       2
 120 #define SETUSTACK       3
 121
 122 /*
 123  * values for uc_flags
 124  * these are implementation dependent flags, that should be hidden
 125  * from the user interface, defining which elements of ucontext
 126  * are valid, and should be restored on call to setcontext
 127  */
 128
 129 #define UC_SIGMASK      0x01
 130 #define UC_STACK        0x02
 131 #define UC_CPU          0x04
 132 #define UC_MAU          0x08
 133 #define UC_FPU          UC_MAU
 134 #define UC_INTR         0x10
 135 #define UC_ASR          0x20
 136
 137 #define UC_MCONTEXT     (UC_CPU|UC_FPU|UC_ASR)
 138
 139 /*
 140  * UC_ALL specifies the default context
 141  */
 142
 143 #define UC_ALL          (UC_SIGMASK|UC_STACK|UC_MCONTEXT)
 144 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
 145
 146 #ifdef _KERNEL
 147 extern void savecontext(ucontext_t *, const k_sigset_t *);
 148 extern void restorecontext(ucontext_t *);
 149
 150 #ifdef _SYSCALL32
 151 extern void savecontext32(ucontext32_t *, const k_sigset_t *, struct fq32 *);
 152 #endif
 153 #endif
 154
 155 #ifdef  __cplusplus
 156 }
 157 #endif
 158
 159 #endif /* _SYS_UCONTEXT_H */