sys/arch/i386/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.10 2011/02/25 14:07:13 joerg 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 #define _UC_TLSBASE     0x00080000
  43
  44 /*
  45  * Layout of mcontext_t according to the System V Application Binary Interface,
  46  * Intel386(tm) Architecture Processor Supplement, Fourth Edition.
  47  */
  48
  49 /*
  50  * General register state
  51  */
  52 #define _NGREG          19
  53 typedef int             __greg_t;
  54 typedef __greg_t        __gregset_t[_NGREG];
  55
  56 #define _REG_GS         0
  57 #define _REG_FS         1
  58 #define _REG_ES         2
  59 #define _REG_DS         3
  60 #define _REG_EDI        4
  61 #define _REG_ESI        5
  62 #define _REG_EBP        6
  63 #define _REG_ESP        7
  64 #define _REG_EBX        8
  65 #define _REG_EDX        9
  66 #define _REG_ECX        10
  67 #define _REG_EAX        11
  68 #define _REG_TRAPNO     12
  69 #define _REG_ERR        13
  70 #define _REG_EIP        14
  71 #define _REG_CS         15
  72 #define _REG_EFL        16
  73 #define _REG_UESP       17
  74 #define _REG_SS         18
  75
  76 /*
  77  * Floating point register state
  78  */
  79 typedef struct {
  80         union {
  81                 struct {
  82                         int     __fp_state[27]; /* Environment and registers */
  83                         int     __fp_status;    /* Software status word */
  84                 } __fpchip_state;
  85                 struct {
  86                         char    __fp_emul[246];
  87                         char    __fp_epad[2];
  88                 } __fp_emul_space;
  89                 struct {
  90                         char    __fp_xmm[512];
  91                 } __fp_xmm_state;
  92                 int     __fp_fpregs[128];
  93         } __fp_reg_set;
  94         long    __fp_wregs[33];                 /* Weitek? */
  95 } __fpregset_t;
  96
  97 typedef struct {
  98         __gregset_t     __gregs;
  99         __fpregset_t    __fpregs;
 100         __greg_t        _mc_tlsbase;
 101 #ifdef __minix
 102         int     mc_magic;
 103         int     mc_flags;
 104 #endif
 105 } mcontext_t;
 106
 107 #define _UC_FXSAVE      0x20    /* FP state is in FXSAVE format in XMM space */
 108
 109 #define _UC_MACHINE_PAD 4       /* Padding appended to ucontext_t */
 110
 111 #define _UC_UCONTEXT_ALIGN      (~0xf)
 112
 113 #ifdef _KERNEL_OPT
 114 #include "opt_vm86.h"
 115 #ifdef VM86
 116 /*#include <machine/psl.h>*/
 117 #define PSL_VM 0x00020000
 118 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \
 119         ((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \
 120          ((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0))
 121 #endif /* VM86 */
 122 #endif /* _KERNEL_OPT */
 123
 124 #ifndef _UC_MACHINE_SP
 125 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_UESP])
 126 #endif
 127 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_EIP])
 128 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_EAX])
 129
 130 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 131
 132 #if defined(__minix)
 133 #define _UC_MACHINE_STACK(uc)           ((uc)->uc_mcontext.__gregs[_REG_ESP])
 134 #define _UC_MACHINE_SET_STACK(uc, esp)  _UC_MACHINE_STACK(uc) = (esp)
 135
 136 #define _UC_MACHINE_EBP(uc)             ((uc)->uc_mcontext.__gregs[_REG_EBP])
 137 #define _UC_MACHINE_SET_EBP(uc, ebp)    _UC_MACHINE_EBP(uc) = (ebp)
 138
 139 #define _UC_MACHINE_ESI(uc)             ((uc)->uc_mcontext.__gregs[_REG_ESI])
 140 #define _UC_MACHINE_SET_ESI(uc, esi)    _UC_MACHINE_ESI(uc) = (esi)
 141
 142 int setmcontext(const mcontext_t *mcp);
 143 int getmcontext(mcontext_t *mcp);
 144
 145 #define MCF_MAGIC 0xc0ffee
 146 #define _MC_FPU_SAVED   0x001
 147
 148 #endif /* defined(__minix) */
 149
 150 #define __UCONTEXT_SIZE 776
 151
 152 static __inline void *
 153 __lwp_getprivate_fast(void)
 154 {
 155         void *__tmp;
 156
 157         __asm volatile("movl %%gs:0, %0" : "=r" (__tmp));
 158
 159         return __tmp;
 160 }
 161
 162 #endif  /* !_I386_MCONTEXT_H_ */