gdb/delta68-nat.c

   1 /* Functions specific to running gdb native on a Motorola Delta Series sysV68.
   2    Copyright (C) 1993, 1997-98, Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include <sys/signal.h>         /* for MAXSIG in sys/user.h */
  23 #include <sys/types.h>          /* for ushort in sys/dir.h */
  24 #include <sys/dir.h>            /* for struct direct in sys/user.h */
  25 #include <sys/user.h>
  26
  27 #include <nlist.h>
  28
  29 #if !defined (offsetof)
  30 #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
  31 #endif
  32
  33 /* Return the address in the core dump or inferior of register REGNO.
  34    BLOCKEND is the address of the end of the user structure.  */
  35
  36 CORE_ADDR
  37 register_addr (regno, blockend)
  38      int regno;
  39      CORE_ADDR blockend;
  40 {
  41   static int sysv68reg[] =
  42   {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, -1, 15, 16};
  43
  44   if (regno >= 0 && regno < sizeof (sysv68reg) / sizeof (sysv68reg[0]))
  45     return blockend + sysv68reg[regno] * 4;
  46   else if (regno < FPC_REGNUM)
  47     return offsetof (struct user, u_fpu.regs.reg[regno - FP0_REGNUM][0]);
  48   else if (regno == FPC_REGNUM)
  49     return offsetof (struct user, u_fpu.regs.control);
  50   else if (regno == FPS_REGNUM)
  51     return offsetof (struct user, u_fpu.regs.status);
  52   else if (regno == FPI_REGNUM)
  53     return offsetof (struct user, u_fpu.regs.iaddr);
  54   else
  55     {
  56       fprintf_unfiltered (gdb_stderr, "\
  57 Internal error: invalid register number %d in REGISTER_U_ADDR\n",
  58                           regno);
  59       return blockend;
  60     }
  61 }
  62
  63 CORE_ADDR kernel_u_addr;
  64
  65 /* Read the value of the u area from the kernel.  */
  66 void
  67 _initialize_delta68_nat ()
  68 {
  69   struct nlist nl[2];
  70
  71   nl[0].n_name = "u";
  72   nl[1].n_name = NULL;
  73   if (nlist ("/sysV68", nl) == 0 && nl[0].n_scnum != 0)
  74     kernel_u_addr = nl[0].n_value;
  75   else
  76     {
  77       perror ("Cannot get kernel u area address");
  78       exit (1);
  79     }
  80 }
  81
  82 clear_insn_cache ()
  83 {
  84 #ifdef MCT_TEXT                 /* in sys/signal.h on sysV68 R3V7.1 */
  85   memctl (0, 4096, MCT_TEXT);
  86 #endif
  87 }
  88
  89 kernel_u_size ()
  90 {
  91   return sizeof (struct user);
  92 }