usr/src/uts/intel/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 long   __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 #endif /* _STACK_T */
  69 #endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */
  70
  71 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  72 typedef struct ucontext ucontext_t;
  73 #else
  74 typedef struct __ucontext ucontext_t;
  75 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
  76
  77 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
  78 struct  ucontext {
  79 #else
  80 struct  __ucontext {
  81 #endif
  82         unsigned long   uc_flags;
  83         ucontext_t      *uc_link;
  84         sigset_t        uc_sigmask;
  85         stack_t         uc_stack;
  86         mcontext_t      uc_mcontext;
  87         long            uc_filler[5];   /* see ABI spec for Intel386 */
  88 };
  89
  90 #if defined(_SYSCALL32)
  91
  92 /* Kernel view of user ILP32 ucontext structure */
  93
  94 typedef struct ucontext32 {
  95         uint32_t        uc_flags;
  96         caddr32_t       uc_link;
  97         sigset_t        uc_sigmask;
  98         stack32_t       uc_stack;
  99         mcontext32_t    uc_mcontext;
 100         int32_t         uc_filler[5];
 101 } ucontext32_t;
 102
 103 #if defined(_KERNEL)
 104 extern void ucontext_nto32(const ucontext_t *src, ucontext32_t *dest);
 105 extern void ucontext_32ton(const ucontext32_t *src, ucontext_t *dest);
 106 #endif
 107
 108 #endif  /* _SYSCALL32 */
 109
 110 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
 111 #define GETCONTEXT      0
 112 #define SETCONTEXT      1
 113 #define GETUSTACK       2
 114 #define SETUSTACK       3
 115
 116 /*
 117  * values for uc_flags
 118  * these are implementation dependent flags, that should be hidden
 119  * from the user interface, defining which elements of ucontext
 120  * are valid, and should be restored on call to setcontext
 121  */
 122
 123 #define UC_SIGMASK      0x01
 124 #define UC_STACK        0x02
 125 #define UC_CPU          0x04
 126 #define UC_MAU          0x08
 127 #define UC_FPU          UC_MAU
 128
 129 #define UC_MCONTEXT     (UC_CPU|UC_FPU)
 130
 131 /*
 132  * UC_ALL specifies the default context
 133  */
 134
 135 #define UC_ALL          (UC_SIGMASK|UC_STACK|UC_MCONTEXT)
 136 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
 137
 138 #ifdef _KERNEL
 139 void savecontext(ucontext_t *, const k_sigset_t *);
 140 void restorecontext(ucontext_t *);
 141
 142 #ifdef _SYSCALL32
 143 extern void savecontext32(ucontext32_t *, const k_sigset_t *);
 144 #endif
 145 #endif
 146
 147 #ifdef  __cplusplus
 148 }
 149 #endif
 150
 151 #endif /* _SYS_UCONTEXT_H */