1  /* ucontext_t definition, Nios II version.
       2     Copyright (C) 2015-2023 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 */