1/* Native-dependent code for Motorola 88000 BSD's.
2
3   Copyright (C) 2004, 2007 Free Software Foundation, Inc.
4
5   This file is part of GDB.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
19
20#include "defs.h"
21#include "inferior.h"
22#include "regcache.h"
23#include "target.h"
24
25#include <sys/types.h>
26#include <sys/ptrace.h>
27#include <machine/reg.h>
28
29#include "m88k-tdep.h"
30#include "inf-ptrace.h"
31
32/* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
33
34static void
35m88kbsd_supply_gregset (struct regcache *regcache, const void *gregs)
36{
37  const char *regs = gregs;
38  int regnum;
39
40  for (regnum = 0; regnum < M88K_NUM_REGS; regnum++)
41    regcache_raw_supply (regcache, regnum, regs + regnum * 4);
42}
43
44/* Collect the general-purpose registers from REGCACHE and store them
45   in GREGS.  */
46
47static void
48m88kbsd_collect_gregset (const struct regcache *regcache,
49			 void *gregs, int regnum)
50{
51  char *regs = gregs;
52  int i;
53
54  for (i = 0; i < M88K_NUM_REGS; i++)
55    {
56      if (regnum == -1 || regnum == i)
57	regcache_raw_collect (regcache, i, regs + i * 4);
58    }
59}
60
61
62/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
63   for all registers.  */
64
65static void
66m88kbsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
67{
68  struct reg regs;
69
70  if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
71	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
72    perror_with_name (_("Couldn't get registers"));
73
74  m88kbsd_supply_gregset (regcache, &regs);
75}
76
77/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
78   this for all registers.  */
79
80static void
81m88kbsd_store_inferior_registers (struct regcache *regcache, int regnum)
82{
83  struct reg regs;
84
85  if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
86	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
87    perror_with_name (_("Couldn't get registers"));
88
89  m88kbsd_collect_gregset (regcache, &regs, regnum);
90
91  if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
92	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
93    perror_with_name (_("Couldn't write registers"));
94}
95
96
97/* Provide a prototype to silence -Wmissing-prototypes.  */
98void _initialize_m88kbsd_nat (void);
99
100void
101_initialize_m88kbsd_nat (void)
102{
103  struct target_ops *t;
104
105  t = inf_ptrace_target ();
106  t->to_fetch_registers = m88kbsd_fetch_inferior_registers;
107  t->to_store_registers = m88kbsd_store_inferior_registers;
108  add_target (t);
109}
110