sysdeps/unix/sysv/linux/ia64/bits/sigstack.h

   1 /* sigstack, sigaltstack definitions.
   2    Copyright (C) 1998, 2000, 2002, 2003 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #ifndef _SIGNAL_H
  21 # error "Never include this file directly.  Use <signal.h> instead"
  22 #endif
  23
  24 #ifndef _SIGSTACK_H
  25 #define _SIGSTACK_H     1
  26
  27 /* Structure describing a signal stack (obsolete).  */
  28 struct sigstack
  29   {
  30     __ptr_t ss_sp;              /* Signal stack pointer.  */
  31     int ss_onstack;             /* Nonzero if executing on this stack.  */
  32   };
  33
  34
  35 /* Possible values for `ss_flags.'.  */
  36 enum
  37 {
  38   SS_ONSTACK = 1,
  39 #define SS_ONSTACK      SS_ONSTACK
  40   SS_DISABLE
  41 #define SS_DISABLE      SS_DISABLE
  42 };
  43
  44 /* Minimum stack size for a signal handler.
  45
  46    Yes, this should be 131072 but the constant got defined incorrectly
  47    in the kernel and we have to live with it.  Users should in any case
  48    use SIGSTKSZ as the size user-supplied buffers should have.  */
  49 #define MINSIGSTKSZ     131027
  50
  51 /* System default stack size.  */
  52 #define SIGSTKSZ        262144
  53
  54
  55 /* Alternate, preferred interface.  */
  56 typedef struct sigaltstack
  57   {
  58     __ptr_t ss_sp;
  59     int ss_flags;
  60     size_t ss_size;
  61   } stack_t;
  62
  63 #endif  /* bits/sigstack.h */