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  #endif
      85  
      86  #ifdef __USE_MISC
      87  # define __ctx(fld) fld
      88  #else
      89  # define __ctx(fld) __ ## fld
      90  #endif
      91  
      92  /* Structure to describe FPU registers.  */
      93  typedef struct
      94  {
      95    int __ctx(f_pcr);
      96    int __ctx(f_psr);
      97    int __ctx(f_fpiaddr);
      98  #ifdef __mcoldfire__
      99    int __ctx(f_fpregs)[8][2];
     100  #else
     101    int __ctx(f_fpregs)[8][3];
     102  #endif
     103  } fpregset_t;
     104  
     105  /* Context to describe whole processor state.  */
     106  typedef struct
     107  {
     108    int __ctx(version);
     109    gregset_t __ctx(gregs);
     110    fpregset_t __ctx(fpregs);
     111  } mcontext_t;
     112  
     113  #ifdef __USE_MISC
     114  # define MCONTEXT_VERSION 2
     115  #endif
     116  
     117  /* Userlevel context.  */
     118  typedef struct ucontext_t
     119  {
     120    unsigned long __ctx(uc_flags);
     121    struct ucontext_t *uc_link;
     122    stack_t uc_stack;
     123    mcontext_t uc_mcontext;
     124    unsigned long __glibc_reserved1[80];
     125    sigset_t uc_sigmask;
     126  } ucontext_t;
     127  
     128  #undef __ctx
     129  
     130  #endif /* sys/ucontext.h */