glibc/nptl/sysdeps/unix/sysv/linux/ia64/jmpbuf-unwind.h

/* Copyright (C) 2003, 2004, 2005 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <setjmp.h>
#include <stdint.h>
#include <unwind.h>

static inline uintptr_t __attribute__ ((unused))
_jmpbuf_sp (__jmp_buf regs, int i)
{
  uintptr_t sp = ((unsigned long int *) regs)[i];
#ifdef PTR_DEMANGLE
  PTR_DEMANGLE (sp);
#endif
  return sp;
}


#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj)		      \
  ({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj);	      \
    (_cfa < _jmpbuf_sp (_jmpbuf, 0) - (_adj)				      \
     || (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj)		      \
	 && ((uintptr_t) _Unwind_GetBSP (_context) - (_adj)		      \
	     >= _jmpbuf_sp (_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)