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

   1 /* Copyright (C) 2003, 2004, 2005 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <setjmp.h>
  21 #include <stdint.h>
  22 #include <unwind.h>
  23
  24 static inline uintptr_t __attribute__ ((unused))
  25 _jmpbuf_sp (__jmp_buf regs, int i)
  26 {
  27   uintptr_t sp = ((unsigned long int *) regs)[i];
  28 #ifdef PTR_DEMANGLE
  29   PTR_DEMANGLE (sp);
  30 #endif
  31   return sp;
  32 }
  33
  34
  35 #define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj)                      \
  36   ({ uintptr_t _cfa = (uintptr_t) _Unwind_GetCFA (_context) - (_adj);         \
  37     (_cfa < _jmpbuf_sp (_jmpbuf, 0) - (_adj)                                  \
  38      || (_cfa == (uintptr_t)(((long *)(_jmpbuf))[0]) - (_adj)                 \
  39          && ((uintptr_t) _Unwind_GetBSP (_context) - (_adj)                   \
  40              >= _jmpbuf_sp (_jmpbuf, 17) - (_adj))));                         \
  41   })
  42
  43 #define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
  44   ((uintptr_t)(_address) - (_adj) < (uintptr_t)(((long *)_jmpbuf)[0]) - (_adj))
  45
  46 /* We use a longjmp() which can cross from the alternate signal-stack
  47    to the normal stack.  */
  48 extern void __libc_unwind_longjmp (sigjmp_buf env, int val)
  49           __attribute__ ((noreturn));
  50 hidden_proto (__libc_unwind_longjmp)