sysdeps/m68k/sys/ucontext.h

   1 /* Copyright (C) 1997-2024 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 */