sysdeps/ia64/jmpbuf-unwind.h

   1 /* Copyright (C) 2003-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <setjmp.h>
  20 #include <stdint.h>
  21 #include <unwind.h>
  22
  23 /* Test if longjmp to JMPBUF would unwind the frame containing a local
  24    variable at ADDRESS.  */
  25 #define _JMPBUF_UNWINDS(_jmpbuf, _address, _demangle) \
  26   ((void *) (_address) < (void *) (((long int *) _jmpbuf)[0]))
  27
  28 #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
  29   ({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj);   \
  30      (_cfa < (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj)               \
  31       || (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj)          \
  32           && (uintptr_t) _Unwind_GetBSP (_context) - (_adj)             \
  33              >= (uintptr_t)(((long *)(_jmpbuf))[17]) - (_adj)));        \
  34   })
  35
  36 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
  37   ((uintptr_t)(_address) - (_adj) < (uintptr_t)(((long *)_jmpbuf)[0]) - (_adj))
  38
  39 /* We use a longjmp() which can cross from the alternate signal-stack
  40    to the normal stack.  */
  41 extern void __libc_unwind_longjmp (sigjmp_buf env, int val)
  42           __attribute__ ((noreturn));
  43 hidden_proto (__libc_unwind_longjmp)