1/* Native-dependent code for PowerPC's running NetBSD, for GDB.
2   Copyright 2002 Free Software Foundation, Inc.
3   Contributed by Wasabi Systems, 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 2 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, write to the Free Software
19   Foundation, Inc., 59 Temple Place - Suite 330,
20   Boston, MA 02111-1307, USA.  */
21
22#include <sys/types.h>
23#include <sys/ptrace.h>
24#include <machine/reg.h>
25
26#include "defs.h"
27#include "inferior.h"
28
29#include "ppc-tdep.h"
30#include "ppcnbsd-tdep.h"
31
32/* Returns true if PT_GETREGS fetches this register.  */
33static int
34getregs_supplies (int regno)
35{
36  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
37
38  return ((regno >= 0 && regno <= 31)
39          || regno == tdep->ppc_lr_regnum
40          || regno == tdep->ppc_cr_regnum
41          || regno == tdep->ppc_xer_regnum
42          || regno == tdep->ppc_ctr_regnum
43	  || regno == PC_REGNUM);
44}
45
46/* Like above, but for PT_GETFPREGS.  */
47static int
48getfpregs_supplies (int regno)
49{
50  struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
51
52  return ((regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31)
53	  || regno == tdep->ppc_fpscr_regnum);
54}
55
56void
57fetch_inferior_registers (int regno)
58{
59  if (regno == -1 || getregs_supplies (regno))
60    {
61      struct reg regs;
62
63      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
64		  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
65        perror_with_name ("Couldn't get registers");
66
67      ppcnbsd_supply_reg ((char *) &regs, regno);
68      if (regno != -1)
69	return;
70    }
71
72  if (regno == -1 || getfpregs_supplies (regno))
73    {
74      struct fpreg fpregs;
75
76      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
77		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
78	perror_with_name ("Couldn't get FP registers");
79
80      ppcnbsd_supply_fpreg ((char *) &fpregs, regno);
81      if (regno != -1)
82	return;
83    }
84}
85
86void
87store_inferior_registers (int regno)
88{
89  if (regno == -1 || getregs_supplies (regno))
90    {
91      struct reg regs;
92
93      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
94		  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
95	perror_with_name ("Couldn't get registers");
96
97      ppcnbsd_fill_reg ((char *) &regs, regno);
98
99      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
100		  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
101	perror_with_name ("Couldn't write registers");
102
103      if (regno != -1)
104	return;
105    }
106
107  if (regno == -1 || getfpregs_supplies (regno))
108    {
109      struct fpreg fpregs;
110
111      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
112		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
113	perror_with_name ("Couldn't get FP registers");
114
115      ppcnbsd_fill_fpreg ((char *) &fpregs, regno);
116
117      if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
118		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
119	perror_with_name ("Couldn't set FP registers");
120    }
121}
122