libc/sysdeps/linux/common/bits/sigstack.h

   1 /* sigstack, sigaltstack definitions.
   2    Copyright (C) 1998, 1999 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SIGNAL_H
  20 # error "Never include this file directly.  Use <signal.h> instead"
  21 #endif
  22
  23
  24 #if defined __UCLIBC_SUSV4_LEGACY__ || !defined __UCLIBC_STRICT_HEADERS__
  25 /* Structure describing a signal stack (obsolete).  */
  26 struct sigstack
  27   {
  28     void *ss_sp;                /* Signal stack pointer.  */
  29     int ss_onstack;             /* Nonzero if executing on this stack.  */
  30   };
  31 #endif
  32
  33
  34 /* Possible values for `ss_flags.'.  */
  35 enum
  36 {
  37   SS_ONSTACK = 1,
  38 #define SS_ONSTACK      SS_ONSTACK
  39   SS_DISABLE
  40 #define SS_DISABLE      SS_DISABLE
  41 };
  42
  43 /* Minimum stack size for a signal handler.  */
  44 #define MINSIGSTKSZ     2048
  45
  46 /* System default stack size.  */
  47 #define SIGSTKSZ        8192
  48
  49
  50 /* Alternate, preferred interface.  */
  51 typedef struct sigaltstack
  52   {
  53     void *ss_sp;
  54     int ss_flags;
  55     size_t ss_size;
  56   } stack_t;