text: /* Copyright (C) 2009-2017 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 <stdio.h>
  #include <signal.h>
  #include <sysdep.h>
  #define __longjmp ____longjmp_chk
  #define CHECK_SP(sp)							      \
    do {									      \
      register unsigned long this_sp asm ("sp");				      \
      if ((unsigned long) (sp) < this_sp)					      \
        {									      \
  	struct sigaltstack oss;						      \
  	INTERNAL_SYSCALL_DECL (err);					      \
  	int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss);      \
  	if (!INTERNAL_SYSCALL_ERROR_P (result, err)			      \
  	    && ((oss.ss_flags & SS_ONSTACK) == 0			      \
  		|| ((unsigned long) oss.ss_sp + oss.ss_size		      \
  		    - (unsigned long) (sp)) < oss.ss_size))		      \
  	  __fortify_fail ("longjmp causes uninitialized stack frame");	      \
        }									      \
    } while (0)
  
  #include <__longjmp.c>
  