sysdeps/unix/sysv/linux/nios2/sys/ucontext.h

   1 /* ucontext_t definition, Nios II version.
   2    Copyright (C) 2015-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /* System V/Nios II ABI compliant context switching support.  */
  20
  21 #ifndef _SYS_UCONTEXT_H
  22 #define _SYS_UCONTEXT_H 1
  23
  24 #include <features.h>
  25
  26 #include <bits/types/sigset_t.h>
  27 #include <bits/types/stack_t.h>
  28
  29
  30 /* These definitions must be in sync with the kernel.  */
  31
  32 #ifdef __USE_MISC
  33 # define MCONTEXT_VERSION 2
  34 #endif
  35
  36 #ifdef __USE_MISC
  37 # define __ctx(fld) fld
  38 #else
  39 # define __ctx(fld) __ ## fld
  40 #endif
  41
  42 /* Context to describe whole processor state.  */
  43 typedef struct
  44   {
  45     int __ctx(version);
  46     unsigned long __ctx(regs)[32];
  47   } mcontext_t;
  48
  49 /* Userlevel context.  */
  50 typedef struct ucontext_t
  51   {
  52     unsigned long __ctx(uc_flags);
  53     struct ucontext_t *uc_link;
  54     stack_t uc_stack;
  55     mcontext_t uc_mcontext;
  56     sigset_t uc_sigmask;
  57   } ucontext_t;
  58
  59 #undef __ctx
  60
  61 #endif /* sys/ucontext.h */