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+/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   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 <setjmp.h>
+#include <stdint.h>
+#include <unwind.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame containing a local
+   variable at ADDRESS.  */
+#define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \
+  ((void *) (_address) < (void *) (((long int *) _jmpbuf)[0]))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+  ({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj);	\
+     (_cfa < (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj)		\
+      || (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj)		\
+	  && (uintptr_t) _Unwind_GetBSP (_context) - (_adj)		\
+	     >= (uintptr_t)(((long *)(_jmpbuf))[17]) - (_adj)));	\
+  })
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+  ((uintptr_t)(_address) - (_adj) < (uintptr_t)(((long *)_jmpbuf)[0]) - (_adj))
+
+/* We use a longjmp() which can cross from the alternate signal-stack
+   to the normal stack.  */
+extern void __libc_unwind_longjmp (sigjmp_buf env, int val)
+          __attribute__ ((noreturn));
+hidden_proto (__libc_unwind_longjmp)