1/* Native-dependent code for NetBSD/sh.
2
3   Copyright (C) 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
4
5   Contributed by Wasabi Systems, Inc.
6
7   This file is part of GDB.
8
9   This program is free software; you can redistribute it and/or modify
10   it under the terms of the GNU General Public License as published by
11   the Free Software Foundation; either version 3 of the License, or
12   (at your option) any later version.
13
14   This program is distributed in the hope that it will be useful,
15   but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License for more details.
18
19   You should have received a copy of the GNU General Public License
20   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
21
22#include "defs.h"
23#include "inferior.h"
24
25#include <sys/types.h>
26#include <sys/ptrace.h>
27#include <machine/reg.h>
28
29#include "sh-tdep.h"
30#include "shnbsd-tdep.h"
31#include "inf-ptrace.h"
32#include "regcache.h"
33
34
35/* Determine if PT_GETREGS fetches this register. */
36#define GETREGS_SUPPLIES(regno) \
37  (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
38|| (regno) == gdbarch_pc_regnum (current_gdbarch) || (regno) == PR_REGNUM \
39|| (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
40|| (regno) == SR_REGNUM)
41
42static void
43shnbsd_fetch_inferior_registers (struct regcache *regcache, int regno)
44{
45  if (regno == -1 || GETREGS_SUPPLIES (regno))
46    {
47      struct reg inferior_registers;
48
49      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
50		  (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
51	perror_with_name (_("Couldn't get registers"));
52
53      shnbsd_supply_reg (regcache, (char *) &inferior_registers, regno);
54
55      if (regno != -1)
56	return;
57    }
58}
59
60static void
61shnbsd_store_inferior_registers (struct regcache *regcache, int regno)
62{
63  if (regno == -1 || GETREGS_SUPPLIES (regno))
64    {
65      struct reg inferior_registers;
66
67      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
68		  (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
69	perror_with_name (_("Couldn't get registers"));
70
71      shnbsd_fill_reg (regcache, (char *) &inferior_registers, regno);
72
73      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
74		  (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
75	perror_with_name (_("Couldn't set registers"));
76
77      if (regno != -1)
78	return;
79    }
80}
81
82/* Provide a prototype to silence -Wmissing-prototypes.  */
83void _initialize_shnbsd_nat (void);
84
85void
86_initialize_shnbsd_nat (void)
87{
88  struct target_ops *t;
89
90  t = inf_ptrace_target ();
91  t->to_fetch_registers = shnbsd_fetch_inferior_registers;
92  t->to_store_registers = shnbsd_store_inferior_registers;
93  add_target (t);
94}
95