sys/arch/mips/include/mcontext.h

   1 /*      $NetBSD: mcontext.h,v 1.10 2009/11/26 01:21:50 matt Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1999, 2002 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, and by Jason R. Thorpe of Wasabi Systems, Inc.
   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 _MIPS_MCONTEXT_H_
  33 #define _MIPS_MCONTEXT_H_
  34
  35 /*
  36  * General register state
  37  */
  38 #define _NGREG          37      /* R0-R31, MDLO, MDHI, CAUSE, PC, SR */
  39
  40 #define _REG_R0         0
  41 #define _REG_AT         1
  42 #define _REG_V0         2
  43 #define _REG_V1         3
  44 #define _REG_A0         4
  45 #define _REG_A1         5
  46 #define _REG_A2         6
  47 #define _REG_A3         7
  48 #define _REG_T0         8
  49 #define _REG_T1         9
  50 #define _REG_T2         10
  51 #define _REG_T3         11
  52 #define _REG_T4         12
  53 #define _REG_T5         13
  54 #define _REG_T6         14
  55 #define _REG_T7         15
  56 #define _REG_S0         16
  57 #define _REG_S1         17
  58 #define _REG_S2         18
  59 #define _REG_S3         19
  60 #define _REG_S4         20
  61 #define _REG_S5         21
  62 #define _REG_S6         22
  63 #define _REG_S7         23
  64 #define _REG_T8         24
  65 #define _REG_T9         25
  66 #define _REG_K0         26
  67 #define _REG_K1         27
  68 #define _REG_GP         28
  69 #define _REG_SP         29
  70 #define _REG_S8         30
  71 #define _REG_RA         31
  72
  73 /* XXX: The following conflict with <mips/regnum.h> */
  74 #define _REG_MDLO       32
  75 #define _REG_MDHI       33
  76 #define _REG_CAUSE      34
  77 #define _REG_EPC        35
  78 #define _REG_SR         36
  79
  80 #ifndef __ASSEMBLER__
  81
  82 /* Make sure this is signed; we need pointers to be sign-extended. */
  83 #if defined(__mips_n32)
  84 typedef long long       __greg_t;
  85 #else
  86 typedef long            __greg_t;
  87 #endif /* __mips_n32 */
  88
  89 typedef __greg_t        __gregset_t[_NGREG];
  90
  91 /*
  92  * For the O32/O64 ABI, there are 16 doubles, one at each even FP reg
  93  * number.  The FP registers themselves are 32-bits.
  94  *
  95  * For 64-bit ABIs (include N32), each FP register is a 64-bit double.
  96  */
  97 typedef __greg_t        __freg_t;
  98
  99 /*
 100  * Floating point register state
 101  */
 102 struct __fpregset_nabi {
 103         union {
 104                 double  __fp64_dregs[32];
 105                 __freg_t __fp_regs[32];
 106         } __fp_r;
 107         __greg_t        __fp_csr;
 108 };
 109 struct __fpregset_oabi {
 110         union {
 111                 double  __fp_dregs[16];
 112                 float   __fp_fregs[32];
 113                 __int32_t __fp_regs[32];
 114         } __fp_r;
 115         unsigned int    __fp_csr;
 116         unsigned int    __fp_pad;
 117 };
 118
 119 #if __mips_n32 || __mips_n64
 120 typedef struct __fpregset_nabi __fpregset_t;
 121 #else
 122 typedef struct __fpregset_oabi __fpregset_t;
 123 #endif
 124
 125 typedef struct {
 126         __gregset_t     __gregs;
 127         __fpregset_t    __fpregs;
 128 } mcontext_t;
 129
 130 #if defined(_KERNEL) && defined(_LP64)
 131 typedef __int32_t       __greg32_t;
 132 typedef __greg32_t      __gregset32_t[_NGREG];
 133
 134 typedef struct {
 135         __gregset32_t           __gregs;
 136         struct __fpregset_oabi  __fpregs;
 137 } mcontext_o32_t;
 138
 139 typedef struct {
 140         __gregset_t             __gregs;
 141         struct __fpregset_nabi  __fpregs;
 142 } mcontext32_t;
 143
 144 #endif /* _KERNEL && _LP64 */
 145
 146 #endif /* !__ASSEMBLER__ */
 147
 148 #define _UC_MACHINE_PAD 16      /* Padding appended to ucontext_t */
 149
 150 #define _UC_SETSTACK    0x00010000
 151 #define _UC_CLRSTACK    0x00020000
 152
 153 #define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_SP])
 154 #define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_EPC])
 155 #define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_V0])
 156
 157 #define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)
 158
 159 #define _UC_MACHINE32_SP(uc)    _UC_MACHINE_SP(uc)
 160 #define _UC_MACHINE32_PC(uc)    _UC_MACHINE_PC(uc)
 161 #define _UC_MACHINE32_INTRV(uc) _UC_MACHINE_INTRV(uc)
 162
 163 #define _UC_MACHINE32_SET_PC(uc, pc)    _UC_MACHINE_PC((uc), (pc))
 164
 165 #endif  /* _MIPS_MCONTEXT_H_ */