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------------------------------------------------------------------------------

--                                                                          --

--                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --

--                                                                          --

--                          S Y S T E M .  L I N U X                        --

--                                                                          --

--                                  S p e c                                 --

--                                                                          --

--          Copyright (C) 2009-2011, Free Software Foundation, Inc.         --

--                                                                          --

-- GNARL is free software; you can  redistribute it  and/or modify it under --

-- terms of the  GNU General Public License as published  by the Free Soft- --

-- ware  Foundation;  either version 3,  or (at your option) any later ver- --

-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --

-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --

-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

--                                                                          --

------------------------------------------------------------------------------

--  This is the alpha version of this package

--  This package encapsulates cpu specific differences between implementations

--  of GNU/Linux, in order to share s-osinte-linux.ads.

--  PLEASE DO NOT add any with-clauses to this package or remove the pragma

--  Preelaborate. This package is designed to be a bottom-level (leaf) package.

package System.Linux is

   pragma Preelaborate;

   -----------

   -- Errno --

   -----------

   EAGAIN    : constant := 35;

   EINTR     : constant := 4;

   EINVAL    : constant := 22;

   ENOMEM    : constant := 12;

   EPERM     : constant := 1;

   ETIMEDOUT : constant := 60;

   -------------

   -- Signals --

   -------------

   SIGHUP     : constant := 1; --  hangup

   SIGINT     : constant := 2; --  interrupt (rubout)

   SIGQUIT    : constant := 3; --  quit (ASCD FS)

   SIGILL     : constant := 4; --  illegal instruction (not reset)

   SIGTRAP    : constant := 5; --  trace trap (not reset)

   SIGIOT     : constant := 6; --  IOT instruction

   SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future

   SIGFPE     : constant := 8; --  floating point exception

   SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)

   SIGBUS     : constant := 10; --  bus error

   SIGSEGV    : constant := 11; --  segmentation violation

   SIGPIPE    : constant := 13; --  write on a pipe with no one to read it

   SIGALRM    : constant := 14; --  alarm clock

   SIGTERM    : constant := 15; --  software termination signal from kill

   SIGURG     : constant := 16; --  urgent condition on IO channel

   SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)

   SIGTSTP    : constant := 18; --  user stop requested from tty

   SIGCONT    : constant := 19; --  stopped process has been continued

   SIGCLD     : constant := 20; --  alias for SIGCHLD

   SIGCHLD    : constant := 20; --  child status change

   SIGTTIN    : constant := 21; --  background tty read attempted

   SIGTTOU    : constant := 22; --  background tty write attempted

   SIGIO      : constant := 23; --  I/O now possible (4.2 BSD)

   SIGPOLL    : constant := 23; --  pollable event occurred

   SIGXCPU    : constant := 24; --  CPU time limit exceeded

   SIGXFSZ    : constant := 25; --  filesize limit exceeded

   SIGVTALRM  : constant := 26; --  virtual timer expired

   SIGPROF    : constant := 27; --  profiling timer expired

   SIGWINCH   : constant := 28; --  window size change

   SIGPWR     : constant := 29; --  power-fail restart

   SIGUSR1    : constant := 30; --  user defined signal 1

   SIGUSR2    : constant := 31; --  user defined signal 2

   SIGLTHRRES : constant := 32; --  GNU/LinuxThreads restart signal

   SIGLTHRCAN : constant := 33; --  GNU/LinuxThreads cancel signal

   SIGLTHRDBG : constant := 34; --  GNU/LinuxThreads debugger signal

   SIGADAABORT : constant := SIGABRT;

   --  Change this if you want to use another signal for task abort.

   --  SIGTERM might be a good one.

   SIGUNUSED  : constant := 0;

   SIGSTKFLT  : constant := 0;

   SIGLOST    : constant := 0;

   --  These don't exist for Linux/Alpha.  The constants are present

   --  so that we can continue to use a-intnam-linux.ads.

   --  struct_sigaction offsets

   sa_handler_pos : constant := 0;

   sa_mask_pos    : constant := Standard'Address_Size / 8;

   sa_flags_pos   : constant := 128 + sa_mask_pos;

   SA_SIGINFO  : constant := 16#40#;

   SA_ONSTACK  : constant := 16#01#;

end System.Linux;