src/fault-linux-ia64.h

   1 /* Fault handler information.  Linux/IA-64 version.
   2    Copyright (C) 2002-2003, 2009  Bruno Haible <bruno@clisp.org>
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 #include "fault-posix-ucontext.h"
  19
  20 /* See glibc/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h.
  21    Note that the 'mcontext_t' defined in
  22    glibc/sysdeps/unix/sysv/linux/ia64/sys/ucontext.h
  23    and the 'struct sigcontext' defined in
  24    glibc/sysdeps/unix/sysv/linux/ia64/ia64/bits/sigcontext.h
  25    (see also <asm/sigcontext.h>)
  26    are actually the same.  */
  27
  28 /* IA-64 has two stack pointers, one that grows down, called $r12, and one
  29    that grows up, called $bsp/$bspstore.  */
  30 #define SIGSEGV_FAULT_STACKPOINTER  ((ucontext_t *) ucp)->uc_mcontext.sc_gr[12]
  31
  32 /* It would be better to access $bspstore instead of $bsp but I don't know
  33    where to find it in 'struct sigcontext'.  Anyway, it doesn't matter
  34    because $bsp and $bspstore never differ by more than ca. 1 KB.  */
  35 #define SIGSEGV_FAULT_BSP_POINTER  ((ucontext_t *) ucp)->uc_mcontext.sc_ar_bsp