arch/x86/include/sys/mcontext.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  * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
  23  *
  24  * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
  25  */
  26 /*      Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
  27
  28 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T         */
  29 /*      All Rights Reserved     */
  30
  31 /*
  32  * Essential struct definitions for mcontext_t needed by ucontext.h
  33  * These were formerly in regset.h, which now includes this file.
  34  */
  35
  36 #ifndef _SYS_MCONTEXT_H
  37 #define _SYS_MCONTEXT_H
  38
  39 #include <sys/feature_tests.h>
  40
  41 #if !defined(_ASM)
  42 #include <sys/types.h>
  43 #endif
  44
  45 #ifdef __cplusplus
  46 extern "C" {
  47 #endif
  48
  49 /*
  50  * A gregset_t is defined as an array type for compatibility with the reference
  51  * source. This is important due to differences in the way the C language
  52  * treats arrays and structures as parameters.
  53  */
  54 #if defined(__amd64)
  55 #define _NGREG  28
  56 #else
  57 #define _NGREG  19
  58 #endif
  59
  60 #if !defined(_ASM)
  61
  62 #if defined(_LP64) || defined(_I32LPx)
  63 typedef long    greg_t;
  64 #else
  65 typedef int     greg_t;
  66 #endif
  67
  68 #if defined(_SYSCALL32)
  69
  70 typedef int32_t greg32_t;
  71 typedef int64_t greg64_t;
  72
  73 #endif  /* _SYSCALL32 */
  74
  75 typedef greg_t  gregset_t[_NGREG];
  76
  77 #if defined(_SYSCALL32)
  78
  79 #define _NGREG32        19
  80 #define _NGREG64        28
  81
  82 typedef greg32_t gregset32_t[_NGREG32];
  83 typedef greg64_t gregset64_t[_NGREG64];
  84
  85 #endif  /* _SYSCALL32 */
  86
  87 /*
  88  * Floating point definitions.
  89  */
  90
  91 #if defined(__amd64)
  92
  93 typedef struct _fpu {
  94         union {
  95                 struct _fpchip_state {
  96                         uint16_t cw;
  97                         uint16_t sw;
  98                         uint8_t  fctw;
  99                         uint8_t  __fx_rsvd;
 100                         uint16_t fop;
 101                         uint64_t rip;
 102                         uint64_t rdp;
 103                         uint32_t mxcsr;
 104                         uint32_t mxcsr_mask;
 105                         union {
 106                                 uint16_t fpr_16[5];
 107                                 upad128_t __fpr_pad;
 108                         } st[8];
 109                         upad128_t xmm[16];
 110                         upad128_t __fx_ign2[6];
 111                         uint32_t status;        /* sw at exception */
 112                         uint32_t xstatus;       /* mxcsr at exception */
 113                 } fpchip_state;
 114                 uint32_t        f_fpregs[130];
 115         } fp_reg_set;
 116 } fpregset_t;
 117
 118 #else   /* __i386 */
 119
 120 /*
 121  * This definition of the floating point structure is binary
 122  * compatible with the Intel386 psABI definition, and source
 123  * compatible with that specification for x87-style floating point.
 124  * It also allows SSE/SSE2 state to be accessed on machines that
 125  * possess such hardware capabilities.
 126  */
 127 typedef struct _fpu {
 128         union {
 129                 struct _fpchip_state {
 130                         uint32_t state[27];     /* 287/387 saved state */
 131                         uint32_t status;        /* saved at exception */
 132                         uint32_t mxcsr;         /* SSE control and status */
 133                         uint32_t xstatus;       /* SSE mxcsr at exception */
 134                         uint32_t __pad[2];      /* align to 128-bits */
 135                         upad128_t xmm[8];       /* %xmm0-%xmm7 */
 136                 } fpchip_state;
 137                 struct _fp_emul_space {         /* for emulator(s) */
 138                         uint8_t fp_emul[246];
 139                         uint8_t fp_epad[2];
 140                 } fp_emul_space;
 141                 uint32_t        f_fpregs[95];   /* union of the above */
 142         } fp_reg_set;
 143 } fpregset_t;
 144
 145 #endif  /* __i386 */
 146
 147 #if defined(_SYSCALL32)
 148
 149 /* Kernel view of user i386 fpu structure */
 150
 151 typedef struct fpu32 {
 152         union {
 153                 struct fpchip32_state {
 154                         uint32_t state[27];     /* 287/387 saved state */
 155                         uint32_t status;        /* saved at exception */
 156                         uint32_t mxcsr;         /* SSE control and status */
 157                         uint32_t xstatus;       /* SSE mxcsr at exception */
 158                         uint32_t __pad[2];      /* align to 128-bits */
 159                         uint32_t xmm[8][4];     /* %xmm0-%xmm7 */
 160                 } fpchip_state;
 161                 uint32_t        f_fpregs[95];   /* union of the above */
 162         } fp_reg_set;
 163 } fpregset32_t;
 164
 165 #endif  /* _SYSCALL32 */
 166
 167 /*
 168  * Structure mcontext defines the complete hardware machine state.
 169  * (This structure is specified in the i386 ABI suppl.)
 170  */
 171 typedef struct {
 172         gregset_t       gregs;          /* general register set */
 173         fpregset_t      fpregs;         /* floating point register set */
 174 } mcontext_t;
 175
 176 #if defined(_SYSCALL32)
 177
 178 typedef struct {
 179         gregset32_t     gregs;          /* general register set */
 180         fpregset32_t    fpregs;         /* floating point register set */
 181 } mcontext32_t;
 182
 183 #endif  /* _SYSCALL32 */
 184
 185 #endif  /* _ASM */
 186
 187 #ifdef  __cplusplus
 188 }
 189 #endif
 190
 191 #endif  /* _SYS_MCONTEXT_H */