sysdeps/mips/sys/ucontext.h

   1 /* Copyright (C) 1998-2023 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    <https://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
  25 #include <bits/types.h>
  26 #include <bits/types/sigset_t.h>
  27 #include <bits/types/stack_t.h>
  28
  29 #include <sgidefs.h>
  30
  31
  32 /* Type for general register.  */
  33 #if _MIPS_SIM == _ABIO32
  34 typedef __uint32_t greg_t;
  35 #else
  36 typedef __uint64_t greg_t;
  37 #endif
  38
  39 /* Number of general registers.  */
  40 #define __NGREG 36
  41 #ifdef __USE_MISC
  42 # define NGREG  __NGREG
  43 #endif
  44
  45 /* Container for all general registers.  */
  46 typedef greg_t gregset_t[__NGREG];
  47
  48 #ifdef __USE_MISC
  49 /* Number of each register is the `gregset_t' array.  */
  50 enum
  51 {
  52   CTX_R0 = 0,
  53 # define CTX_R0 CTX_R0
  54   CTX_AT = 1,
  55 # define CTX_AT CTX_AT
  56   CTX_V0 = 2,
  57 # define CTX_V0 CTX_V0
  58   CTX_V1 = 3,
  59 # define CTX_V1 CTX_V1
  60   CTX_A0 = 4,
  61 # define CTX_A0 CTX_A0
  62   CTX_A1 = 5,
  63 # define CTX_A1 CTX_A1
  64   CTX_A2 = 6,
  65 # define CTX_A2 CTX_A2
  66   CTX_A3 = 7,
  67 # define CTX_A3 CTX_A3
  68   CTX_T0 = 8,
  69 # define CTX_T0 CTX_T0
  70   CTX_T1 = 9,
  71 # define CTX_T1 CTX_T1
  72   CTX_T2 = 10,
  73 # define CTX_T2 CTX_T2
  74   CTX_T3 = 11,
  75 # define CTX_T3 CTX_T3
  76   CTX_T4 = 12,
  77 # define CTX_T4 CTX_T4
  78   CTX_T5 = 13,
  79 # define CTX_T5 CTX_T5
  80   CTX_T6 = 14,
  81 # define CTX_T6 CTX_T6
  82   CTX_T7 = 15,
  83 # define CTX_T7 CTX_T7
  84   CTX_S0 = 16,
  85 # define CTX_S0 CTX_S0
  86   CTX_S1 = 17,
  87 # define CTX_S1 CTX_S1
  88   CTX_S2 = 18,
  89 # define CTX_S2 CTX_S2
  90   CTX_S3 = 19,
  91 # define CTX_S3 CTX_S3
  92   CTX_S4 = 20,
  93 # define CTX_S4 CTX_S4
  94   CTX_S5 = 21,
  95 # define CTX_S5 CTX_S5
  96   CTX_S6 = 22,
  97 # define CTX_S6 CTX_S6
  98   CTX_S7 = 23,
  99 # define CTX_S7 CTX_S7
 100   CTX_T8 = 24,
 101 # define CTX_T8 CTX_T8
 102   CTX_T9 = 25,
 103 # define CTX_T9 CTX_T9
 104   CTX_K0 = 26,
 105 # define CTX_K0 CTX_K0
 106   CTX_K1 = 27,
 107 # define CTX_K1 CTX_K1
 108   CTX_GP = 28,
 109 # define CTX_GP CTX_GP
 110   CTX_SP = 29,
 111 # define CTX_SP CTX_SP
 112   CTX_S8 = 30,
 113 # define CTX_S8 CTX_S8
 114   CTX_RA = 31,
 115 # define CTX_RA CTX_RA
 116   CTX_MDLO = 32,
 117 # define CTX_MDLO       CTX_MDLO
 118   CTX_MDHI = 33,
 119 # define CTX_MDHI       CTX_MDHI
 120   CTX_CAUSE = 34,
 121 # define CTX_CAUSE      CTX_CAUSE
 122   CTX_EPC = 35,
 123 # define CTX_EPC        CTX_EPC
 124 };
 125 #endif
 126
 127 #ifdef __USE_MISC
 128 # define __ctx(fld) fld
 129 #else
 130 # define __ctx(fld) __ ## fld
 131 #endif
 132
 133 /* Structure to describe FPU registers.  */
 134 typedef struct
 135 {
 136   union
 137   {
 138 #if _MIPS_SIM == _ABIO32
 139     double __ctx(fp_dregs)[16];
 140     float __ctx(fp_fregs)[32];
 141     unsigned int __ctx(fp_regs)[32];
 142 #else
 143     double __ctx(fp_dregs)[32];
 144     /* float __ctx(fp_fregs)[32]; */
 145     __uint64_t __ctx(fp_regs)[32];
 146 #endif
 147   } __ctx(fp_r);
 148   unsigned int __ctx(fp_csr);
 149   unsigned int __ctx(fp_pad);
 150 } fpregset_t;
 151
 152 /* Context to describe whole processor state.  */
 153 typedef struct
 154 {
 155   gregset_t __ctx(gpregs);
 156   fpregset_t __ctx(fpregs);
 157 } mcontext_t;
 158
 159 /* Userlevel context.  */
 160 typedef struct ucontext_t
 161 {
 162 #if _MIPS_SIM == _ABIO32
 163   unsigned long int __ctx(uc_flags);
 164 #else
 165   __uint64_t __ctx(uc_flags);
 166 #endif
 167   struct ucontext_t *uc_link;
 168   sigset_t uc_sigmask;
 169   stack_t uc_stack;
 170   mcontext_t uc_mcontext;
 171   int __glibc_reserved1[48];
 172 } ucontext_t;
 173
 174 #undef __ctx
 175
 176 #endif /* sys/ucontext.h */