gdb/delta68-nat.c

   1 /* Functions specific to running gdb native on a Motorola Delta Series sysV68.
   2    Copyright 1993, 1996, 1998, 2000 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 (int regno, CORE_ADDR blockend)
  38 {
  39   static int sysv68reg[] =
  40   {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, -1, 15, 16};
  41
  42   if (regno >= 0 && regno < sizeof (sysv68reg) / sizeof (sysv68reg[0]))
  43     return blockend + sysv68reg[regno] * 4;
  44   else if (regno < FPC_REGNUM)
  45     return offsetof (struct user, u_fpu.regs.reg[regno - FP0_REGNUM][0]);
  46   else if (regno == FPC_REGNUM)
  47     return offsetof (struct user, u_fpu.regs.control);
  48   else if (regno == FPS_REGNUM)
  49     return offsetof (struct user, u_fpu.regs.status);
  50   else if (regno == FPI_REGNUM)
  51     return offsetof (struct user, u_fpu.regs.iaddr);
  52   else
  53     {
  54       fprintf_unfiltered (gdb_stderr, "\
  55 Internal error: invalid register number %d in REGISTER_U_ADDR\n",
  56                           regno);
  57       return blockend;
  58     }
  59 }
  60
  61 CORE_ADDR kernel_u_addr;
  62
  63 /* Read the value of the u area from the kernel.  */
  64 void
  65 _initialize_delta68_nat (void)
  66 {
  67   struct nlist nl[2];
  68
  69   nl[0].n_name = "u";
  70   nl[1].n_name = NULL;
  71   if (nlist ("/sysV68", nl) == 0 && nl[0].n_scnum != 0)
  72     kernel_u_addr = nl[0].n_value;
  73   else
  74     {
  75       perror ("Cannot get kernel u area address");
  76       exit (1);
  77     }
  78 }
  79
  80 clear_insn_cache (void)
  81 {
  82 #ifdef MCT_TEXT                 /* in sys/signal.h on sysV68 R3V7.1 */
  83   memctl (0, 4096, MCT_TEXT);
  84 #endif
  85 }
  86
  87 kernel_u_size (void)
  88 {
  89   return sizeof (struct user);
  90 }