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 (void)
  47 {
  48   return (8192);
  49 }
  50
  51 /* FIXME: Fake out the fcntl() call, which we don't have.  */
  52 fcntl (int fd, int cmd, int arg)
  53 {
  54
  55   switch (cmd)
  56     {
  57     case F_GETFL:
  58       return (O_RDONLY);
  59       break;
  60     default:
  61       printf_unfiltered ("Ultra3's fcntl() failing, cmd = %d.\n", cmd);
  62       return (-1);
  63     }
  64 }
  65
  66
  67 /*
  68  * 4.2 Signal support, requires linking with libjobs.
  69  */
  70 static int _SigMask;
  71 #define sigbit(s)       (1L << ((s)-1))
  72
  73 init_SigMask (void)
  74 {
  75   /* Taken from the sym1 kernel in machdep.c:startup() */
  76   _SigMask = sigbit (SIGTSTP) | sigbit (SIGTTOU) | sigbit (SIGTTIN) |
  77     sigbit (SIGCHLD) | sigbit (SIGTINT);
  78 }
  79
  80 sigmask (int signo)
  81 {
  82   return (1 << (signo - 1));
  83 }
  84
  85 sigsetmask (unsigned int sigmask)
  86 {
  87   int i, mask = 1;
  88   int lastmask = _SigMask;
  89
  90   for (i = 0; i < NSIG; i++)
  91     {
  92       if (sigmask & mask)
  93         {
  94           if (!(_SigMask & mask))
  95             {
  96               sighold (i + 1);
  97               _SigMask |= mask;
  98             }
  99         }
 100       else if (_SigMask & mask)
 101         {
 102           sigrelse (i + 1);
 103           _SigMask &= ~mask;
 104         }
 105       mask <<= 1;
 106     }
 107   return (lastmask);
 108 }
 109
 110 sigblock (unsigned int sigmask)
 111 {
 112   int i, mask = 1;
 113   int lastmask = _SigMask;
 114
 115   for (i = 0; i < NSIG; i++)
 116     {
 117       if ((sigmask & mask) && !(_SigMask & mask))
 118         {
 119           sighold (i + 1);
 120           _SigMask |= mask;
 121         }
 122       mask <<= 1;
 123     }
 124   return (lastmask);
 125 }
 126 #endif /* SYM1 */
 127
 128
 129 /* Initialization code for this module.  */
 130
 131 void
 132 _initialize_ultra3 (void)
 133 {
 134 #ifdef SYM1
 135   init_SigMask ();
 136 #endif
 137 }