ports/sysdeps/mips/sys/ucontext.h

   1 /* Copyright (C) 1998-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library.  If not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /* System V/mips ABI compliant context switching support.  */
  19
  20 #ifndef _SYS_UCONTEXT_H
  21 #define _SYS_UCONTEXT_H 1
  22
  23 #include <features.h>
  24 #include <sgidefs.h>
  25 #include <signal.h>
  26
  27 /* Type for general register.  */
  28 #if _MIPS_SIM == _ABIO32
  29 typedef __uint32_t greg_t;
  30 #else
  31 typedef __uint64_t greg_t;
  32 #endif
  33
  34 /* Number of general registers.  */
  35 #define NGREG   36
  36
  37 /* Container for all general registers.  */
  38 typedef greg_t gregset_t[NGREG];
  39
  40 /* Number of each register is the `gregset_t' array.  */
  41 enum
  42 {
  43   CTX_R0 = 0,
  44 #define CTX_R0  CTX_R0
  45   CTX_AT = 1,
  46 #define CTX_AT  CTX_AT
  47   CTX_V0 = 2,
  48 #define CTX_V0  CTX_V0
  49   CTX_V1 = 3,
  50 #define CTX_V1  CTX_V1
  51   CTX_A0 = 4,
  52 #define CTX_A0  CTX_A0
  53   CTX_A1 = 5,
  54 #define CTX_A1  CTX_A1
  55   CTX_A2 = 6,
  56 #define CTX_A2  CTX_A2
  57   CTX_A3 = 7,
  58 #define CTX_A3  CTX_A3
  59   CTX_T0 = 8,
  60 #define CTX_T0  CTX_T0
  61   CTX_T1 = 9,
  62 #define CTX_T1  CTX_T1
  63   CTX_T2 = 10,
  64 #define CTX_T2  CTX_T2
  65   CTX_T3 = 11,
  66 #define CTX_T3  CTX_T3
  67   CTX_T4 = 12,
  68 #define CTX_T4  CTX_T4
  69   CTX_T5 = 13,
  70 #define CTX_T5  CTX_T5
  71   CTX_T6 = 14,
  72 #define CTX_T6  CTX_T6
  73   CTX_T7 = 15,
  74 #define CTX_T7  CTX_T7
  75   CTX_S0 = 16,
  76 #define CTX_S0  CTX_S0
  77   CTX_S1 = 17,
  78 #define CTX_S1  CTX_S1
  79   CTX_S2 = 18,
  80 #define CTX_S2  CTX_S2
  81   CTX_S3 = 19,
  82 #define CTX_S3  CTX_S3
  83   CTX_S4 = 20,
  84 #define CTX_S4  CTX_S4
  85   CTX_S5 = 21,
  86 #define CTX_S5  CTX_S5
  87   CTX_S6 = 22,
  88 #define CTX_S6  CTX_S6
  89   CTX_S7 = 23,
  90 #define CTX_S7  CTX_S7
  91   CTX_T8 = 24,
  92 #define CTX_T8  CTX_T8
  93   CTX_T9 = 25,
  94 #define CTX_T9  CTX_T9
  95   CTX_K0 = 26,
  96 #define CTX_K0  CTX_K0
  97   CTX_K1 = 27,
  98 #define CTX_K1  CTX_K1
  99   CTX_GP = 28,
 100 #define CTX_GP  CTX_GP
 101   CTX_SP = 29,
 102 #define CTX_SP  CTX_SP
 103   CTX_S8 = 30,
 104 #define CTX_S8  CTX_S8
 105   CTX_RA = 31,
 106 #define CTX_RA  CTX_RA
 107   CTX_MDLO = 32,
 108 #define CTX_MDLO        CTX_MDLO
 109   CTX_MDHI = 33,
 110 #define CTX_MDHI        CTX_MDHI
 111   CTX_CAUSE = 34,
 112 #define CTX_CAUSE       CTX_CAUSE
 113   CTX_EPC = 35,
 114 #define CTX_EPC CTX_EPC
 115 };
 116
 117 /* Structure to describe FPU registers.  */
 118 typedef struct fpregset
 119 {
 120   union
 121   {
 122 #if _MIPS_SIM == _ABIO32
 123     double fp_dregs[16];
 124     float fp_fregs[32];
 125     unsigned int fp_regs[32];
 126 #else
 127     double fp_dregs[32];
 128     /* float fp_fregs[32]; */
 129     __uint64_t fp_regs[32];
 130 #endif
 131   } fp_r;
 132   unsigned int fp_csr;
 133   unsigned int fp_pad;
 134 } fpregset_t;
 135
 136 /* Context to describe whole processor state.  */
 137 typedef struct
 138 {
 139   gregset_t gpregs;
 140   fpregset_t fpregs;
 141 } mcontext_t;
 142
 143 /* Userlevel context.  */
 144 typedef struct ucontext
 145 {
 146 #if _MIPS_SIM == _ABIO32
 147   unsigned long int uc_flags;
 148 #else
 149   __uint64_t uc_flags;
 150 #endif
 151   struct ucontext *uc_link;
 152   __sigset_t uc_sigmask;
 153   stack_t uc_stack;
 154   mcontext_t uc_mcontext;
 155   int uc_filler[48];
 156 } ucontext_t;
 157
 158 #endif /* sys/ucontext.h */