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/* Host-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
   Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
   Contributed by David Wood (wood@nyu.edu) at New York University.
 
   This file is part of GDB.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */
 
#define DEBUG
#include "defs.h"
#include "frame.h"
#include "inferior.h"
#include "symtab.h"
#include "value.h"
 
#include <sys/types.h>
#include <sys/param.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>
 
#include "gdbcore.h"
 
#include <sys/file.h>
#include "gdb_stat.h"
 
/* Assorted operating system circumventions */
 
#ifdef SYM1
 
/* FIXME: Kludge this for now. It really should be system call. */
int
getpagesize ()
{
  return (8192);
}
 
/* FIXME: Fake out the fcntl() call, which we don't have.  */
fcntl (fd, cmd, arg)
     int fd, cmd, arg;
{
 
  switch (cmd)
    {
    case F_GETFL:
      return (O_RDONLY);
      break;
    default:
      printf_unfiltered ("Ultra3's fcntl() failing, cmd = %d.\n", cmd);
      return (-1);
    }
}
 
 
/* 
 * 4.2 Signal support, requires linking with libjobs.
 */
static int _SigMask;
#define sigbit(s)       (1L << ((s)-1))
 
init_SigMask ()
{
  /* Taken from the sym1 kernel in machdep.c:startup() */
  _SigMask = sigbit (SIGTSTP) | sigbit (SIGTTOU) | sigbit (SIGTTIN) |
    sigbit (SIGCHLD) | sigbit (SIGTINT);
}
 
sigmask (signo)
     int signo;
{
  return (1 << (signo - 1));
}
 
sigsetmask (sigmask)
     unsigned int sigmask;
{
  int i, mask = 1;
  int lastmask = _SigMask;
 
  for (i = 0; i < NSIG; i++)
    {
      if (sigmask & mask)
	{
	  if (!(_SigMask & mask))
	    {
	      sighold (i + 1);
	      _SigMask |= mask;
	    }
	}
      else if (_SigMask & mask)
	{
	  sigrelse (i + 1);
	  _SigMask &= ~mask;
	}
      mask <<= 1;
    }
  return (lastmask);
}
 
sigblock (sigmask)
     unsigned int sigmask;
{
  int i, mask = 1;
  int lastmask = _SigMask;
 
  for (i = 0; i < NSIG; i++)
    {
      if ((sigmask & mask) && !(_SigMask & mask))
	{
	  sighold (i + 1);
	  _SigMask |= mask;
	}
      mask <<= 1;
    }
  return (lastmask);
}
#endif /* SYM1 */
 
 
/* Initialization code for this module.  */
 
void
_initialize_ultra3 ()
{
#ifdef SYM1
  init_SigMask ();
#endif
}