glibc/setjmp/bsd-setjmp.c

/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'.  Stub version.
   Copyright (C) 1994-2016 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/>.  */

#include <sysdep.h>
#include <setjmp.h>

#undef setjmp

/* This implementation in C will not usually work, because the call
   really needs to be a tail-call so __sigsetjmp saves the state of
   the caller, not the state of this `setjmp' frame which then
   immediate unwinds.  */

int
setjmp (jmp_buf env)
{
  return __sigsetjmp (env, 1);
}