summaryrefslogtreecommitdiffstats
path: root/gdb/sparc64nbsd-nat.c
blob: a991d0ef2a4d9753ca9c59e52e1bc750bf0e36fc (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
204
205
206
207
/* Native-dependent code for UltraSPARC systems running NetBSD.
   Copyright 2002 Free Software Foundation, Inc.
   Contributed by Wasabi Systems, 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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

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

#include "sparcnbsd-tdep.h"

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

/* NOTE: We don't bother with any of the deferred_store nonsense; it
   makes things a lot more complicated than they need to be.  */

/* Determine if PT_GETREGS fetches this register.  */
static int
getregs_supplies (int regno)
{
  /* FIXME: PS_REGNUM for 32-bit code.  */
  return (regno == TSTATE_REGNUM
	  || regno == PC_REGNUM
	  || regno == NPC_REGNUM
	  || regno == Y_REGNUM
	  || (regno >= G0_REGNUM && regno <= G7_REGNUM)
	  || (regno >= O0_REGNUM && regno <= O7_REGNUM)
	  /* stack regs (handled by sparcnbsd_supply_reg)  */
	  || (regno >= L0_REGNUM && regno <= I7_REGNUM));
}

/* Determine if PT_GETFPREGS fetches this register.  */
static int
getfpregs_supplies (int regno)
{
  return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 47))
	  || regno == FPS_REGNUM);
}

void
fetch_inferior_registers (int regno)
{
  /* We don't use deferred stores.  */
  if (deferred_stores)
    internal_error (__FILE__, __LINE__,
		    "fetch_inferior_registers: deferred stores pending");

  if (regno == -1 || getregs_supplies (regno))
    {
      union {
	struct reg32 regs32;
	struct reg64 regs64;
      } regs;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
        perror_with_name ("Couldn't get registers");

      if (gdbarch_ptr_bit (current_gdbarch) == 32)
        sparcnbsd_supply_reg32 ((char *) &regs.regs32, regno);
      else
	sparcnbsd_supply_reg64 ((char *) &regs.regs64, regno);
      if (regno != -1)
	return;
    }

  if (regno == -1 || getfpregs_supplies (regno))
    {
      union {
        struct fpreg32 fpregs32;
	struct fpreg64 fpregs64;
      } fpregs;

      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
        perror_with_name ("Couldn't get floating point registers");

      if (gdbarch_ptr_bit (current_gdbarch) == 32)
        sparcnbsd_supply_fpreg32 ((char *) &fpregs.fpregs32, regno);
      else
        sparcnbsd_supply_fpreg64 ((char *) &fpregs.fpregs64, regno);
      if (regno != -1)
	return;
    }
}

void
store_inferior_registers (int regno)
{
  /* We don't use deferred stores.  */
  if (deferred_stores)
    internal_error (__FILE__, __LINE__,
		    "store_inferior_registers: deferred stores pending");

  if (regno == -1 || getregs_supplies (regno))
    {
      union {
	struct reg32 regs32;
	struct reg64 regs64;
      } regs;

      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
	perror_with_name ("Couldn't get registers");

      if (gdbarch_ptr_bit (current_gdbarch) == 32)
        sparcnbsd_fill_reg32 ((char *) &regs.regs32, regno);
      else
	sparcnbsd_fill_reg64 ((char *) &regs.regs64, regno);

      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
	perror_with_name ("Couldn't write registers");

      /* Deal with the stack regs.  */
      if (regno == -1 || regno == SP_REGNUM
	  || (regno >= L0_REGNUM && regno <= I7_REGNUM))
	{
	  CORE_ADDR sp = read_register (SP_REGNUM);
	  int i;
	  char buf[8];

	  if (sp & 1)
	    {
	      /* Registers are 64-bit.  */
	      sp += 2047;

	      for (i = L0_REGNUM; i <= I7_REGNUM; i++)
		{
		  if (regno == -1 || regno == SP_REGNUM || regno == i)
		    {
		      regcache_collect (i, buf);
		      target_write_memory (sp + ((i - L0_REGNUM) * 8),
					   buf, sizeof (buf));
		    }
		}
            }
	  else
	    {
	      /* Registers are 32-bit.  Toss any sign-extension of the stack
		 pointer.

		 FIXME: We don't currently handle 32-bit code in a binary
		 that indicated LP64.  Do we have to care about that?  */
              if (gdbarch_ptr_bit (current_gdbarch) != 32)
		internal_error
		    (__FILE__, __LINE__,
		    "store_inferior_registers: 32-bit code in 64-bit inferior");

	      sp &= 0xffffffffUL;
	      for (i = L0_REGNUM; i <= I7_REGNUM; i++)
	        {
	          if (regno == -1 || regno == SP_REGNUM || regno == i)
		    {
		      regcache_collect (i, buf);
		      target_write_memory (sp + ((i - L0_REGNUM) * 4), buf, 4);
		    }
		}
	    }
	}

      if (regno != -1)
	return;
    }

  if (regno == -1 || getfpregs_supplies (regno))
    {
      union {
	struct fpreg32 fpregs32;
	struct fpreg64 fpregs64;
      } fpregs;

      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
	perror_with_name ("Couldn't get floating point registers");

      if (gdbarch_ptr_bit (current_gdbarch) == 32)
        sparcnbsd_fill_fpreg32 ((char *) &fpregs.fpregs32, regno);
      else
	sparcnbsd_fill_fpreg64 ((char *) &fpregs.fpregs64, regno);
      
      if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
	perror_with_name ("Couldn't write floating point registers");

      if (regno != -1)
	return;
    }
}
OpenPOWER on IntegriCloud