summaryrefslogtreecommitdiff
path: root/gdb/sun3-nat.c
blob: ed70665a253f9cdb92f1d5e348c894cf1262126f (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
/* Host-dependent code for Sun-3 for GDB, the GNU debugger.
   Copyright 1986, 1987, 1989, 1991, 1992 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 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 "gdbcore.h"

#include <sys/ptrace.h>
#define KERNEL			/* To get floating point reg definitions */
#include <machine/reg.h>

static void fetch_core_registers PARAMS ((char *, unsigned, int, CORE_ADDR));

void
fetch_inferior_registers (regno)
     int regno;
{
  struct regs inferior_registers;
#ifdef FP0_REGNUM
  struct fp_status inferior_fp_registers;
#endif

  registers_fetched ();

  ptrace (PTRACE_GETREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_registers);
#ifdef FP0_REGNUM
  ptrace (PTRACE_GETFPREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers);
#endif

  memcpy (registers, &inferior_registers, 16 * 4);
#ifdef FP0_REGNUM
  memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
	  sizeof inferior_fp_registers.fps_regs);
#endif
  *(int *) &registers[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
  *(int *) &registers[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
#ifdef FP0_REGNUM
  memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
	  &inferior_fp_registers.fps_control,
      sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
#endif
}

/* Store our register values back into the inferior.
   If REGNO is -1, do this for all registers.
   Otherwise, REGNO specifies which register (so we can save time).  */

void
store_inferior_registers (regno)
     int regno;
{
  struct regs inferior_registers;
#ifdef FP0_REGNUM
  struct fp_status inferior_fp_registers;
#endif

  memcpy (&inferior_registers, registers, 16 * 4);
#ifdef FP0_REGNUM
  memcpy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
	  sizeof inferior_fp_registers.fps_regs);
#endif
  inferior_registers.r_ps = *(int *) &registers[REGISTER_BYTE (PS_REGNUM)];
  inferior_registers.r_pc = *(int *) &registers[REGISTER_BYTE (PC_REGNUM)];

#ifdef FP0_REGNUM
  memcpy (&inferior_fp_registers.fps_control,
	  &registers[REGISTER_BYTE (FPC_REGNUM)],
      sizeof inferior_fp_registers - sizeof inferior_fp_registers.fps_regs);
#endif

  ptrace (PTRACE_SETREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_registers);
#if FP0_REGNUM
  ptrace (PTRACE_SETFPREGS, inferior_pid,
	  (PTRACE_ARG3_TYPE) & inferior_fp_registers);
#endif
}


/* All of this stuff is only relevant if both host and target are sun3.  */
/* Machine-dependent code for pulling registers out of a Sun-3 core file. */

static void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
     char *core_reg_sect;
     unsigned core_reg_size;
     int which;
     CORE_ADDR reg_addr;	/* Unused in this version */
{
  struct regs *regs = (struct regs *) core_reg_sect;

  if (which == 0)
    {
      if (core_reg_size < sizeof (struct regs))
	  error ("Can't find registers in core file");

      memcpy (registers, (char *) regs, 16 * 4);
      supply_register (PS_REGNUM, (char *) &regs->r_ps);
      supply_register (PC_REGNUM, (char *) &regs->r_pc);

    }
  else if (which == 2)
    {

#define fpustruct  ((struct fpu *) core_reg_sect)

      if (core_reg_size >= sizeof (struct fpu))
	{
#ifdef FP0_REGNUM
	  memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)],
		  fpustruct->f_fpstatus.fps_regs,
		  sizeof fpustruct->f_fpstatus.fps_regs);
	  memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)],
		  &fpustruct->f_fpstatus.fps_control,
		  sizeof fpustruct->f_fpstatus -
		  sizeof fpustruct->f_fpstatus.fps_regs);
#endif
	}
      else
	fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
    }
}


/* Register that we are able to handle sun3 core file formats.
   FIXME: is this really bfd_target_unknown_flavour? */

static struct core_fns sun3_core_fns =
{
  bfd_target_unknown_flavour,
  fetch_core_registers,
  NULL
};

void
_initialize_core_sun3 ()
{
  add_core_fns (&sun3_core_fns);
}