glibc/bits/sigcontext.h

/* Structure describing state saved while handling a signal.  Stub version.
   Copyright (C) 1991-2015 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, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _SIGNAL_H
# error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
#endif

/* State of this thread when the signal was taken.  */
struct sigcontext
  {
    int sc_onstack;
    __sigset_t sc_mask;

    /* Registers and such.  */
  };

/* Signal subcodes should be defined here.  */