sysdeps/mips/sys/ucontext.h

   1 /* Copyright (C) 1998, 1999, 2002, 2003, 2004 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /* System V/mips ABI compliant context switching support.  */
  20
  21 #ifndef _SYS_UCONTEXT_H
  22 #define _SYS_UCONTEXT_H 1
  23
  24 #include <features.h>
  25 #include <sgidefs.h>
  26 #include <signal.h>
  27
  28 /* Type for general register.  */
  29 #if _MIPS_SIM == _ABIO32
  30 typedef __uint32_t greg_t;
  31 #else
  32 typedef __uint64_t greg_t;
  33 #endif
  34
  35 /* Number of general registers.  */
  36 #define NGREG   36
  37
  38 /* Container for all general registers.  */
  39 typedef greg_t gregset_t[NGREG];
  40
  41 /* Number of each register is the `gregset_t' array.  */
  42 enum
  43 {
  44   CTX_R0 = 0,
  45 #define CTX_R0  CTX_R0
  46   CTX_AT = 1,
  47 #define CTX_AT  CTX_AT
  48   CTX_V0 = 2,
  49 #define CTX_V0  CTX_V0
  50   CTX_V1 = 3,
  51 #define CTX_V1  CTX_V1
  52   CTX_A0 = 4,
  53 #define CTX_A0  CTX_A0
  54   CTX_A1 = 5,
  55 #define CTX_A1  CTX_A1
  56   CTX_A2 = 6,
  57 #define CTX_A2  CTX_A2
  58   CTX_A3 = 7,
  59 #define CTX_A3  CTX_A3
  60   CTX_T0 = 8,
  61 #define CTX_T0  CTX_T0
  62   CTX_T1 = 9,
  63 #define CTX_T1  CTX_T1
  64   CTX_T2 = 10,
  65 #define CTX_T2  CTX_T2
  66   CTX_T3 = 11,
  67 #define CTX_T3  CTX_T3
  68   CTX_T4 = 12,
  69 #define CTX_T4  CTX_T4
  70   CTX_T5 = 13,
  71 #define CTX_T5  CTX_T5
  72   CTX_T6 = 14,
  73 #define CTX_T6  CTX_T6
  74   CTX_T7 = 15,
  75 #define CTX_T7  CTX_T7
  76   CTX_S0 = 16,
  77 #define CTX_S0  CTX_S0
  78   CTX_S1 = 17,
  79 #define CTX_S1  CTX_S1
  80   CTX_S2 = 18,
  81 #define CTX_S2  CTX_S2
  82   CTX_S3 = 19,
  83 #define CTX_S3  CTX_S3
  84   CTX_S4 = 20,
  85 #define CTX_S4  CTX_S4
  86   CTX_S5 = 21,
  87 #define CTX_S5  CTX_S5
  88   CTX_S6 = 22,
  89 #define CTX_S6  CTX_S6
  90   CTX_S7 = 23,
  91 #define CTX_S7  CTX_S7
  92   CTX_T8 = 24,
  93 #define CTX_T8  CTX_T8
  94   CTX_T9 = 25,
  95 #define CTX_T9  CTX_T9
  96   CTX_K0 = 26,
  97 #define CTX_K0  CTX_K0
  98   CTX_K1 = 27,
  99 #define CTX_K1  CTX_K1
 100   CTX_GP = 28,
 101 #define CTX_GP  CTX_GP
 102   CTX_SP = 29,
 103 #define CTX_SP  CTX_SP
 104   CTX_S8 = 30,
 105 #define CTX_S8  CTX_S8
 106   CTX_RA = 31,
 107 #define CTX_RA  CTX_RA
 108   CTX_MDLO = 32,
 109 #define CTX_MDLO        CTX_MDLO
 110   CTX_MDHI = 33,
 111 #define CTX_MDHI        CTX_MDHI
 112   CTX_CAUSE = 34,
 113 #define CTX_CAUSE       CTX_CAUSE
 114   CTX_EPC = 35,
 115 #define CTX_EPC CTX_EPC
 116 };
 117
 118 /* Structure to describe FPU registers.  */
 119 typedef struct fpregset
 120 {
 121   union
 122   {
 123 #if _MIPS_SIM == _ABIO32
 124     double fp_dregs[16];
 125     float fp_fregs[32];
 126     unsigned int fp_regs[32];
 127 #else
 128     double fp_dregs[32];
 129     /* float fp_fregs[32]; */
 130     __uint64_t fp_regs[32];
 131 #endif
 132   } fp_r;
 133   unsigned int fp_csr;
 134   unsigned int fp_pad;
 135 } fpregset_t;
 136
 137 /* Context to describe whole processor state.  */
 138 typedef struct
 139 {
 140   gregset_t gpregs;
 141   fpregset_t fpregs;
 142 } mcontext_t;
 143
 144 /* Userlevel context.  */
 145 typedef struct ucontext
 146 {
 147 #if _MIPS_SIM == _ABIO32
 148   unsigned long int uc_flags;
 149 #else
 150   __uint64_t uc_flags;
 151 #endif
 152   struct ucontext *uc_link;
 153   __sigset_t uc_sigmask;
 154   stack_t uc_stack;
 155   mcontext_t uc_mcontext;
 156   int uc_filler[48];
 157 } ucontext_t;
 158
 159 #endif /* sys/ucontext.h */