gdb/ultra3-xdep.c

   1 /* Host-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
   2    Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
   3    Contributed by David Wood (wood@nyu.edu) at New York University.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #define DEBUG
  23 #include "defs.h"
  24 #include "frame.h"
  25 #include "inferior.h"
  26 #include "symtab.h"
  27 #include "value.h"
  28
  29 #include <sys/types.h>
  30 #include <sys/param.h>
  31 #include <signal.h>
  32 #include <sys/ioctl.h>
  33 #include <fcntl.h>
  34
  35 #include "gdbcore.h"
  36
  37 #include <sys/file.h>
  38 #include "gdb_stat.h"
  39
  40 /* Assorted operating system circumventions */
  41
  42 #ifdef SYM1
  43
  44 /* FIXME: Kludge this for now. It really should be system call. */
  45 int
  46 getpagesize ()
  47 {
  48   return (8192);
  49 }
  50
  51 /* FIXME: Fake out the fcntl() call, which we don't have.  */
  52 fcntl (fd, cmd, arg)
  53      int fd, cmd, arg;
  54 {
  55
  56   switch (cmd)
  57     {
  58     case F_GETFL:
  59       return (O_RDONLY);
  60       break;
  61     default:
  62       printf_unfiltered ("Ultra3's fcntl() failing, cmd = %d.\n", cmd);
  63       return (-1);
  64     }
  65 }
  66
  67
  68 /*
  69  * 4.2 Signal support, requires linking with libjobs.
  70  */
  71 static int _SigMask;
  72 #define sigbit(s)       (1L << ((s)-1))
  73
  74 init_SigMask ()
  75 {
  76   /* Taken from the sym1 kernel in machdep.c:startup() */
  77   _SigMask = sigbit (SIGTSTP) | sigbit (SIGTTOU) | sigbit (SIGTTIN) |
  78     sigbit (SIGCHLD) | sigbit (SIGTINT);
  79 }
  80
  81 sigmask (signo)
  82      int signo;
  83 {
  84   return (1 << (signo - 1));
  85 }
  86
  87 sigsetmask (sigmask)
  88      unsigned int sigmask;
  89 {
  90   int i, mask = 1;
  91   int lastmask = _SigMask;
  92
  93   for (i = 0; i < NSIG; i++)
  94     {
  95       if (sigmask & mask)
  96         {
  97           if (!(_SigMask & mask))
  98             {
  99               sighold (i + 1);
 100               _SigMask |= mask;
 101             }
 102         }
 103       else if (_SigMask & mask)
 104         {
 105           sigrelse (i + 1);
 106           _SigMask &= ~mask;
 107         }
 108       mask <<= 1;
 109     }
 110   return (lastmask);
 111 }
 112
 113 sigblock (sigmask)
 114      unsigned int sigmask;
 115 {
 116   int i, mask = 1;
 117   int lastmask = _SigMask;
 118
 119   for (i = 0; i < NSIG; i++)
 120     {
 121       if ((sigmask & mask) && !(_SigMask & mask))
 122         {
 123           sighold (i + 1);
 124           _SigMask |= mask;
 125         }
 126       mask <<= 1;
 127     }
 128   return (lastmask);
 129 }
 130 #endif /* SYM1 */
 131
 132
 133 /* Initialization code for this module.  */
 134
 135 void
 136 _initialize_ultra3 ()
 137 {
 138 #ifdef SYM1
 139   init_SigMask ();
 140 #endif
 141 }