sys/arch/i386/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.12 2014/02/15 22:20:42 dsl 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                 } __fpchip_state;       /* x87 regs in fsave format */
  84                 struct {
  85                         char    __fp_xmm[512];
  86                 } __fp_xmm_state;       /* x87 and xmm regs in fxsave format */
  87                 int     __fp_fpregs[128];
  88         } __fp_reg_set;
  89         int     __fp_pad[33];                   /* Historic padding */
  90 } __fpregset_t;
  91 __CTASSERT(sizeof (__fpregset_t) == 512 + 33 * 4);
  92
  93 typedef struct {
  94         __gregset_t     __gregs;
  95         __fpregset_t    __fpregs;
  96         __greg_t        _mc_tlsbase;
  97 #ifdef __minix
  98         int     mc_magic;
  99         int     mc_flags;
 100 #endif
 101 } mcontext_t;
 102
 103 #define _UC_FXSAVE      0x20    /* FP state is in FXSAVE format in XMM space */
 104
 105 #define _UC_MACHINE_PAD 4       /* Padding appended to ucontext_t */
 106
 107 #define _UC_UCONTEXT_ALIGN      (~0xf)
 108
 109 #ifdef _KERNEL_OPT
 110 #include "opt_vm86.h"
 111 #ifdef VM86
 112 /*#include <machine/psl.h>*/
 113 #define PSL_VM 0x00020000
 114 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \
 115         ((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \
 116          ((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0))
 117 #endif /* VM86 */
 118 #endif /* _KERNEL_OPT */
 119
 120 #ifndef _UC_MACHINE_SP
 121 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_UESP])
 122 #endif
 123 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_EIP])
 124 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_EAX])
 125
 126 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 127
 128 #if defined(__minix)
 129 #define _UC_MACHINE_STACK(uc)           ((uc)->uc_mcontext.__gregs[_REG_ESP])
 130 #define _UC_MACHINE_SET_STACK(uc, esp)  _UC_MACHINE_STACK(uc) = (esp)
 131
 132 #define _UC_MACHINE_EBP(uc)             ((uc)->uc_mcontext.__gregs[_REG_EBP])
 133 #define _UC_MACHINE_SET_EBP(uc, ebp)    _UC_MACHINE_EBP(uc) = (ebp)
 134
 135 #define _UC_MACHINE_ESI(uc)             ((uc)->uc_mcontext.__gregs[_REG_ESI])
 136 #define _UC_MACHINE_SET_ESI(uc, esi)    _UC_MACHINE_ESI(uc) = (esi)
 137
 138 int setmcontext(const mcontext_t *mcp);
 139 int getmcontext(mcontext_t *mcp);
 140
 141 #define MCF_MAGIC 0xc0ffee
 142 #define _MC_FPU_SAVED   0x001
 143
 144 #endif /* defined(__minix) */
 145
 146 #define __UCONTEXT_SIZE 776
 147
 148 static __inline void *
 149 __lwp_getprivate_fast(void)
 150 {
 151         void *__tmp;
 152
 153         __asm volatile("movl %%gs:0, %0" : "=r" (__tmp));
 154
 155         return __tmp;
 156 }
 157
 158 #endif  /* !_I386_MCONTEXT_H_ */