sys/arch/i386/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.6 2003/10/08 22:43:01 thorpej Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Klaus Klein.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _I386_MCONTEXT_H_
  33 #define _I386_MCONTEXT_H_
  34
  35
  36 /*
  37  * mcontext extensions to handle signal delivery.
  38  */
  39 #define _UC_SETSTACK    0x00010000
  40 #define _UC_CLRSTACK    0x00020000
  41 #define _UC_VM          0x00040000
  42
  43 /*
  44  * Layout of mcontext_t according to the System V Application Binary Interface,
  45  * Intel386(tm) Architecture Processor Supplement, Fourth Edition.
  46  */
  47
  48 /*
  49  * General register state
  50  */
  51 #define _NGREG          19
  52 typedef int             __greg_t;
  53 typedef __greg_t        __gregset_t[_NGREG];
  54
  55 #define _REG_GS         0
  56 #define _REG_FS         1
  57 #define _REG_ES         2
  58 #define _REG_DS         3
  59 #define _REG_EDI        4
  60 #define _REG_ESI        5
  61 #define _REG_EBP        6
  62 #define _REG_ESP        7
  63 #define _REG_EBX        8
  64 #define _REG_EDX        9
  65 #define _REG_ECX        10
  66 #define _REG_EAX        11
  67 #define _REG_TRAPNO     12
  68 #define _REG_ERR        13
  69 #define _REG_EIP        14
  70 #define _REG_CS         15
  71 #define _REG_EFL        16
  72 #define _REG_UESP       17
  73 #define _REG_SS         18
  74
  75 /*
  76  * Floating point register state
  77  */
  78 typedef struct {
  79         union {
  80                 struct {
  81                         int     __fp_state[27]; /* Environment and registers */
  82                         int     __fp_status;    /* Software status word */
  83                 } __fpchip_state;
  84                 struct {
  85                         char    __fp_emul[246];
  86                         char    __fp_epad[2];
  87                 } __fp_emul_space;
  88                 struct {
  89                         char    __fp_xmm[512];
  90                 } __fp_xmm_state;
  91                 int     __fp_fpregs[128];
  92         } __fp_reg_set;
  93         long    __fp_wregs[33];                 /* Weitek? */
  94 } __fpregset_t;
  95
  96 typedef struct {
  97         __gregset_t     __gregs;
  98         __fpregset_t    __fpregs;
  99 } mcontext_t;
 100
 101 #define _UC_FXSAVE      0x20    /* FP state is in FXSAVE format in XMM space */
 102
 103 #define _UC_MACHINE_PAD 5       /* Padding appended to ucontext_t */
 104
 105 #define _UC_UCONTEXT_ALIGN      (~0xf)
 106
 107 #ifdef _KERNEL_OPT
 108 #include "opt_vm86.h"
 109 #ifdef VM86
 110 /*#include <machine/psl.h>*/
 111 #define PSL_VM 0x00020000
 112 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \
 113         ((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \
 114          ((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0))
 115 #endif /* VM86 */
 116 #endif /* _KERNEL_OPT */
 117
 118 #ifndef _UC_MACHINE_SP
 119 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_UESP])
 120 #endif
 121 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_EIP])
 122 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_EAX])
 123
 124 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 125
 126 #endif  /* !_I386_MCONTEXT_H_ */