1/* Copyright (C) 1997-2025 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.  */
 30typedef 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.  */
 39typedef greg_t gregset_t[__NGREG];
 40
 41#ifdef __USE_MISC
 42/* Number of each register is the `gregset_t' array.  */
 43enum
 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.  */
 93typedef 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.  */
106typedef 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.  */
118typedef 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 */