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
36CORE_ADDR
37register_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, "\
55Internal error: invalid register number %d in REGISTER_U_ADDR\n",
56			  regno);
57      return blockend;
58    }
59}
60
61CORE_ADDR kernel_u_addr;
62
63/* Read the value of the u area from the kernel.  */
64void
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
80clear_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
87kernel_u_size (void)
88{
89  return sizeof (struct user);
90}
91