gdb/ultra3-xdep.c

   1 /* Host-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
   2    Copyright 1988, 1989, 1991, 1992, 1993, 1995, 2000
   3    Free Software Foundation, Inc.
   4    Contributed by David Wood (wood@nyu.edu) at New York University.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #define DEBUG
  24 #include "defs.h"
  25 #include "frame.h"
  26 #include "inferior.h"
  27 #include "symtab.h"
  28 #include "value.h"
  29
  30 #include <sys/types.h>
  31 #include <sys/param.h>
  32 #include <signal.h>
  33 #include <sys/ioctl.h>
  34 #include <fcntl.h>
  35
  36 #include "gdbcore.h"
  37
  38 #include <sys/file.h>
  39 #include "gdb_stat.h"
  40
  41 /* Assorted operating system circumventions */
  42
  43 #ifdef SYM1
  44
  45 /* FIXME: Kludge this for now. It really should be system call. */
  46 int
  47 getpagesize (void)
  48 {
  49   return (8192);
  50 }
  51
  52 /* FIXME: Fake out the fcntl() call, which we don't have.  */
  53 fcntl (int fd, int cmd, int 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 (void)
  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 (int signo)
  82 {
  83   return (1 << (signo - 1));
  84 }
  85
  86 sigsetmask (unsigned int sigmask)
  87 {
  88   int i, mask = 1;
  89   int lastmask = _SigMask;
  90
  91   for (i = 0; i < NSIG; i++)
  92     {
  93       if (sigmask & mask)
  94         {
  95           if (!(_SigMask & mask))
  96             {
  97               sighold (i + 1);
  98               _SigMask |= mask;
  99             }
 100         }
 101       else if (_SigMask & mask)
 102         {
 103           sigrelse (i + 1);
 104           _SigMask &= ~mask;
 105         }
 106       mask <<= 1;
 107     }
 108   return (lastmask);
 109 }
 110
 111 sigblock (unsigned int sigmask)
 112 {
 113   int i, mask = 1;
 114   int lastmask = _SigMask;
 115
 116   for (i = 0; i < NSIG; i++)
 117     {
 118       if ((sigmask & mask) && !(_SigMask & mask))
 119         {
 120           sighold (i + 1);
 121           _SigMask |= mask;
 122         }
 123       mask <<= 1;
 124     }
 125   return (lastmask);
 126 }
 127 #endif /* SYM1 */
 128
 129
 130 /* Initialization code for this module.  */
 131
 132 void
 133 _initialize_ultra3 (void)
 134 {
 135 #ifdef SYM1
 136   init_SigMask ();
 137 #endif
 138 }