aboutsummaryrefslogtreecommitdiff
path: root/gdb/hppabsd-nat.c
blob: 6d681c7b6a6511bec11956df49cb9c002f7d01bd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
/* Native-dependent code for HP PA-RISC BSD's.

   Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "inferior.h"
#include "regcache.h"
#include "target.h"

#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>

#include "hppa-tdep.h"
#include "inf-ptrace.h"

static int
hppabsd_gregset_supplies_p (int regnum)
{
  return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_PCOQ_TAIL_REGNUM);
}

static int
hppabsd_fpregset_supplies_p (int regnum)
{
  return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
}

/* Supply the general-purpose registers stored in GREGS to REGCACHE.  */

static void
hppabsd_supply_gregset (struct regcache *regcache, const void *gregs)
{
  const char *regs = gregs;
  int regnum;

  for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
    regcache_raw_supply (regcache, regnum, regs + regnum * 4);

  regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
}

/* Supply the floating-point registers stored in FPREGS to REGCACHE.  */

static void
hppabsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
{
  const char *regs = fpregs;
  int regnum;

  for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
       regnum += 2, regs += 8)
    {
      regcache_raw_supply (regcache, regnum, regs);
      regcache_raw_supply (regcache, regnum + 1, regs + 4);
    }
}

/* Collect the general-purpose registers from REGCACHE and store them
   in GREGS.  */

static void
hppabsd_collect_gregset (const struct regcache *regcache,
			  void *gregs, int regnum)
{
  char *regs = gregs;
  int i;

  for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
    {
      if (regnum == -1 || regnum == i)
	regcache_raw_collect (regcache, i, regs + i * 4);
    }

  if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
    regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs);
  if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
    regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
    regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
}

/* Collect the floating-point registers from REGCACHE and store them
   in FPREGS.  */

static void
hppabsd_collect_fpregset (struct regcache *regcache,
			  void *fpregs, int regnum)
{
  char *regs = fpregs;
  int i;

  for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
    {
      if (regnum == -1 || regnum == i || regnum == i + 1)
	{
	  regcache_raw_collect (regcache, i, regs);
	  regcache_raw_collect (regcache, i + 1, regs + 4);
	}
    }
}


/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
   for all registers (including the floating-point registers).  */

static void
hppabsd_fetch_registers (struct target_ops *ops,
			 struct regcache *regcache, int regnum)
{
  if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
    {
      struct reg regs;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
		  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
	perror_with_name (_("Couldn't get registers"));

      hppabsd_supply_gregset (regcache, &regs);
    }

  if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
    {
      struct fpreg fpregs;

      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
		  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
	perror_with_name (_("Couldn't get floating point status"));

      hppabsd_supply_fpregset (regcache, &fpregs);
    }
}

/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
   this for all registers (including the floating-point registers).  */

static void
hppabsd_store_registers (struct target_ops *ops,
			 struct regcache *regcache, int regnum)
{
  if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
    {
      struct reg regs;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
                  (PTRACE_TYPE_ARG3) &regs, 0) == -1)
        perror_with_name (_("Couldn't get registers"));

      hppabsd_collect_gregset (regcache, &regs, regnum);

      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
	          (PTRACE_TYPE_ARG3) &regs, 0) == -1)
        perror_with_name (_("Couldn't write registers"));
    }

  if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
    {
      struct fpreg fpregs;

      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
		  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
	perror_with_name (_("Couldn't get floating point status"));

      hppabsd_collect_fpregset (regcache, &fpregs, regnum);

      if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
		  (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
	perror_with_name (_("Couldn't write floating point status"));
    }
}

/* Provide a prototype to silence -Wmissing-prototypes.  */
void _initialize_hppabsd_nat (void);

void
_initialize_hppabsd_nat (void)
{
  struct target_ops *t;

  /* Add in local overrides.  */
  t = inf_ptrace_target ();
  t->to_fetch_registers = hppabsd_fetch_registers;
  t->to_store_registers = hppabsd_store_registers;
  add_target (t);
}