1  /* Copyright (C) 1997-2023 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/m68k 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/sigset_t.h>
      26  #include <bits/types/stack_t.h>
      27  
      28  
      29  /* Type for general register.  */
      30  typedef int greg_t;
      31  
      32  /* Number of general registers.  */
      33  #define __NGREG	18
      34  #ifdef __USE_MISC
      35  # define NGREG	__NGREG
      36  #endif
      37  
      38  /* Container for all general registers.  */
      39  typedef greg_t gregset_t[__NGREG];
      40  
      41  #ifdef __USE_MISC
      42  /* Number of each register is the `gregset_t' array.  */
      43  enum
      44  {
      45    R_D0 = 0,
      46  # define R_D0	R_D0
      47    R_D1 = 1,
      48  # define R_D1	R_D1
      49    R_D2 = 2,
      50  # define R_D2	R_D2
      51    R_D3 = 3,
      52  # define R_D3	R_D3
      53    R_D4 = 4,
      54  # define R_D4	R_D4
      55    R_D5 = 5,
      56  # define R_D5	R_D5
      57    R_D6 = 6,
      58  # define R_D6	R_D6
      59    R_D7 = 7,
      60  # define R_D7	R_D7
      61    R_A0 = 8,
      62  # define R_A0	R_A0
      63    R_A1 = 9,
      64  # define R_A1	R_A1
      65    R_A2 = 10,
      66  # define R_A2	R_A2
      67    R_A3 = 11,
      68  # define R_A3	R_A3
      69    R_A4 = 12,
      70  # define R_A4	R_A4
      71    R_A5 = 13,
      72  # define R_A5	R_A5
      73    R_A6 = 14,
      74  # define R_A6	R_A6
      75    R_A7 = 15,
      76  # define R_A7	R_A7
      77    R_SP = 15,
      78  # define R_SP	R_SP
      79    R_PC = 16,
      80  # define R_PC	R_PC
      81    R_PS = 17
      82  # define R_PS	R_PS
      83  };
      84  
      85  /* Structure to describe FPU registers.  */
      86  typedef struct
      87  {
      88    int f_pcr;
      89    int f_psr;
      90    int f_fpiaddr;
      91    int f_fpregs[8][3];
      92  } fpregset_t;
      93  #endif
      94  
      95  #ifdef __USE_MISC
      96  # define __ctx(fld) fld
      97  #else
      98  # define __ctx(fld) __ ## fld
      99  #endif
     100  
     101  /* Context to describe whole processor state.  */
     102  typedef struct
     103  {
     104    int __ctx(version);
     105    gregset_t __ctx(gregs);
     106  } mcontext_t;
     107  
     108  #ifdef __USE_MISC
     109  # define MCONTEXT_VERSION 1
     110  #endif
     111  
     112  /* Userlevel context.  */
     113  typedef struct ucontext_t
     114  {
     115    unsigned long int __ctx(uc_flags);
     116    struct ucontext_t *uc_link;
     117    sigset_t uc_sigmask;
     118    stack_t uc_stack;
     119    mcontext_t uc_mcontext;
     120    long int __glibc_reserved1[201];
     121  } ucontext_t;
     122  
     123  #undef __ctx
     124  
     125  #endif /* sys/ucontext.h */