uclibc-ng/libc/sysdeps/linux/cris/sys/ucontext.h

/* Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/* System V/cris ABI compliant context switching support.  */

#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H 1

#include <features.h>
#include <signal.h>

#include <bits/sigcontext.h>

/* Type for general register.  */
typedef long int greg_t;

/* Number of general registers.  */
#define NGREG   20

/* Container for all general registers.  */
typedef greg_t gregset_t[NGREG];

/* Number of each register is the `gregset_t' array.  */
enum
{
  R0 = 0,
#define R0    R0
  R1 = 1,
#define R1    R1
  R2 = 2,
#define R2    R2
  R3 = 3,
#define R3    R3
  R4 = 4,
#define R4    R4
  R5 = 5,
#define R5    R5
  R6 = 6,
#define R6    R6
  R7 = 7,
#define R7    R7
  R8 = 8,
#define R8    R8
  R9 = 9,
#define R9    R9
  R10 = 10,
#define R10    R10
  R11 = 11,
#define R11    R11
  R12 = 12,
#define R12    R12
  R13 = 13,
#define R13    R13
  R14 = 14,
#define R14    R14
  R15 = 15,
#define R15    R15
  R_SP = R14,
#define R_SP    R_SP
  R_PC = R15,
#define R_PC    R_PC
};

/* A placeholder; CRIS does not have any fp regs.  */
typedef unsigned long fpregset_t;

/* A machine context is exactly a sigcontext.  */
typedef struct sigcontext mcontext_t;

/* Userlevel context.  */
typedef struct ucontext
  {
    unsigned long int uc_flags;
    struct ucontext *uc_link;
    stack_t uc_stack;
    mcontext_t uc_mcontext;
    __sigset_t uc_sigmask;
  } ucontext_t;

#endif /* sys/ucontext.h */