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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #define DEBUG
  22 #include "defs.h"
  23 #include "frame.h"
  24 #include "inferior.h"
  25 #include "symtab.h"
  26 #include "value.h"
  27
  28 #include <sys/types.h>
  29 #include <sys/param.h>
  30 #include <signal.h>
  31 #include <sys/ioctl.h>
  32 #include <fcntl.h>
  33
  34 #include "gdbcore.h"
  35
  36 #include <sys/file.h>
  37 #include <sys/stat.h>
  38
  39 /* Assorted operating system circumventions */
  40
  41 #ifdef SYM1
  42
  43 /* FIXME: Kludge this for now. It really should be system call. */
  44 int
  45 getpagesize()
  46 { return(8192); }
  47
  48 /* FIXME: Fake out the fcntl() call, which we don't have.  */
  49 fcntl(fd, cmd, arg)
  50 int fd, cmd, arg;
  51 {
  52
  53   switch (cmd) {
  54         case F_GETFL: return(O_RDONLY); break;
  55         default:
  56                 printf_unfiltered("Ultra3's fcntl() failing, cmd = %d.\n",cmd);
  57                 return(-1);
  58   }
  59 }
  60
  61
  62 /*
  63  * 4.2 Signal support, requires linking with libjobs.
  64  */
  65 static int      _SigMask;
  66 #define sigbit(s)       (1L << ((s)-1))
  67
  68 init_SigMask()
  69 {
  70         /* Taken from the sym1 kernel in machdep.c:startup() */
  71         _SigMask = sigbit (SIGTSTP) | sigbit (SIGTTOU) | sigbit (SIGTTIN) |
  72                         sigbit (SIGCHLD) | sigbit (SIGTINT);
  73 }
  74
  75 sigmask(signo)
  76         int signo;
  77 {
  78         return (1 << (signo-1));
  79 }
  80
  81 sigsetmask(sigmask)
  82 unsigned int sigmask;
  83 {
  84         int i, mask = 1;
  85         int lastmask = _SigMask;
  86
  87         for (i=0 ; i<NSIG ; i++) {
  88                 if (sigmask & mask) {
  89                         if (!(_SigMask & mask)) {
  90                                 sighold(i+1);
  91                                 _SigMask |= mask;
  92                         }
  93                 } else if (_SigMask & mask) {
  94                         sigrelse(i+1);
  95                         _SigMask &= ~mask;
  96                 }
  97                 mask <<= 1;
  98         }
  99         return (lastmask);
 100 }
 101
 102 sigblock(sigmask)
 103 unsigned int sigmask;
 104 {
 105         int i, mask = 1;
 106         int lastmask = _SigMask;
 107
 108         for (i=0 ; i<NSIG ; i++) {
 109                 if ((sigmask & mask) && !(_SigMask & mask)) {
 110                         sighold(i+1);
 111                         _SigMask |= mask;
 112                 }
 113                 mask <<= 1;
 114         }
 115         return (lastmask);
 116 }
 117 #endif /* SYM1 */
 118
 119
 120 /* Initialization code for this module.  */
 121
 122 void
 123 _initialize_ultra3 ()
 124 {
 125 #ifdef SYM1
 126         init_SigMask();
 127 #endif
 128 }