sysdeps/mips/sys/ucontext.h

   1 /* Copyright (C) 1998-2017 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 <signal.h>
  25
  26 /* We need the signal context definitions even if they are not exposed
  27    by <signal.h>.  */
  28 #include <bits/sigcontext.h>
  29 #include <bits/sigstack.h>
  30
  31 #include <sgidefs.h>
  32
  33
  34 /* Type for general register.  */
  35 #if _MIPS_SIM == _ABIO32
  36 typedef __uint32_t greg_t;
  37 #else
  38 typedef __uint64_t greg_t;
  39 #endif
  40
  41 /* Number of general registers.  */
  42 #define NGREG   36
  43
  44 /* Container for all general registers.  */
  45 typedef greg_t gregset_t[NGREG];
  46
  47 /* Number of each register is the `gregset_t' array.  */
  48 enum
  49 {
  50   CTX_R0 = 0,
  51 #define CTX_R0  CTX_R0
  52   CTX_AT = 1,
  53 #define CTX_AT  CTX_AT
  54   CTX_V0 = 2,
  55 #define CTX_V0  CTX_V0
  56   CTX_V1 = 3,
  57 #define CTX_V1  CTX_V1
  58   CTX_A0 = 4,
  59 #define CTX_A0  CTX_A0
  60   CTX_A1 = 5,
  61 #define CTX_A1  CTX_A1
  62   CTX_A2 = 6,
  63 #define CTX_A2  CTX_A2
  64   CTX_A3 = 7,
  65 #define CTX_A3  CTX_A3
  66   CTX_T0 = 8,
  67 #define CTX_T0  CTX_T0
  68   CTX_T1 = 9,
  69 #define CTX_T1  CTX_T1
  70   CTX_T2 = 10,
  71 #define CTX_T2  CTX_T2
  72   CTX_T3 = 11,
  73 #define CTX_T3  CTX_T3
  74   CTX_T4 = 12,
  75 #define CTX_T4  CTX_T4
  76   CTX_T5 = 13,
  77 #define CTX_T5  CTX_T5
  78   CTX_T6 = 14,
  79 #define CTX_T6  CTX_T6
  80   CTX_T7 = 15,
  81 #define CTX_T7  CTX_T7
  82   CTX_S0 = 16,
  83 #define CTX_S0  CTX_S0
  84   CTX_S1 = 17,
  85 #define CTX_S1  CTX_S1
  86   CTX_S2 = 18,
  87 #define CTX_S2  CTX_S2
  88   CTX_S3 = 19,
  89 #define CTX_S3  CTX_S3
  90   CTX_S4 = 20,
  91 #define CTX_S4  CTX_S4
  92   CTX_S5 = 21,
  93 #define CTX_S5  CTX_S5
  94   CTX_S6 = 22,
  95 #define CTX_S6  CTX_S6
  96   CTX_S7 = 23,
  97 #define CTX_S7  CTX_S7
  98   CTX_T8 = 24,
  99 #define CTX_T8  CTX_T8
 100   CTX_T9 = 25,
 101 #define CTX_T9  CTX_T9
 102   CTX_K0 = 26,
 103 #define CTX_K0  CTX_K0
 104   CTX_K1 = 27,
 105 #define CTX_K1  CTX_K1
 106   CTX_GP = 28,
 107 #define CTX_GP  CTX_GP
 108   CTX_SP = 29,
 109 #define CTX_SP  CTX_SP
 110   CTX_S8 = 30,
 111 #define CTX_S8  CTX_S8
 112   CTX_RA = 31,
 113 #define CTX_RA  CTX_RA
 114   CTX_MDLO = 32,
 115 #define CTX_MDLO        CTX_MDLO
 116   CTX_MDHI = 33,
 117 #define CTX_MDHI        CTX_MDHI
 118   CTX_CAUSE = 34,
 119 #define CTX_CAUSE       CTX_CAUSE
 120   CTX_EPC = 35,
 121 #define CTX_EPC CTX_EPC
 122 };
 123
 124 /* Structure to describe FPU registers.  */
 125 typedef struct fpregset
 126 {
 127   union
 128   {
 129 #if _MIPS_SIM == _ABIO32
 130     double fp_dregs[16];
 131     float fp_fregs[32];
 132     unsigned int fp_regs[32];
 133 #else
 134     double fp_dregs[32];
 135     /* float fp_fregs[32]; */
 136     __uint64_t fp_regs[32];
 137 #endif
 138   } fp_r;
 139   unsigned int fp_csr;
 140   unsigned int fp_pad;
 141 } fpregset_t;
 142
 143 /* Context to describe whole processor state.  */
 144 typedef struct
 145 {
 146   gregset_t gpregs;
 147   fpregset_t fpregs;
 148 } mcontext_t;
 149
 150 /* Userlevel context.  */
 151 typedef struct ucontext
 152 {
 153 #if _MIPS_SIM == _ABIO32
 154   unsigned long int uc_flags;
 155 #else
 156   __uint64_t uc_flags;
 157 #endif
 158   struct ucontext *uc_link;
 159   __sigset_t uc_sigmask;
 160   stack_t uc_stack;
 161   mcontext_t uc_mcontext;
 162   int uc_filler[48];
 163 } ucontext_t;
 164
 165 #endif /* sys/ucontext.h */