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
|
/* GNU/Linux/m68k specific low level interface, for the remote server for GDB.
Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 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 "server.h"
#include "linux-low.h"
/* Defined in auto-generated file reg-m68k.c. */
void init_registers_m68k (void);
#ifdef HAVE_SYS_REG_H
#include <sys/reg.h>
#endif
#define m68k_num_regs 29
#define m68k_num_gregs 18
/* This table must line up with REGISTER_NAMES in tm-m68k.h */
static int m68k_regmap[] =
{
#ifdef PT_D0
PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4,
PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4,
PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4,
PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4,
PT_SR * 4, PT_PC * 4,
#else
14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4,
7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4,
17 * 4, 18 * 4,
#endif
#ifdef PT_FP0
PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4,
PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4,
PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4
#else
21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4,
39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4
#endif
};
static int
m68k_cannot_store_register (int regno)
{
return (regno >= m68k_num_regs);
}
static int
m68k_cannot_fetch_register (int regno)
{
return (regno >= m68k_num_regs);
}
#ifdef HAVE_PTRACE_GETREGS
#include <sys/procfs.h>
#include <sys/ptrace.h>
static void
m68k_fill_gregset (void *buf)
{
int i;
for (i = 0; i < m68k_num_gregs; i++)
collect_register (i, (char *) buf + m68k_regmap[i]);
}
static void
m68k_store_gregset (const void *buf)
{
int i;
for (i = 0; i < m68k_num_gregs; i++)
supply_register (i, (const char *) buf + m68k_regmap[i]);
}
static void
m68k_fill_fpregset (void *buf)
{
int i;
for (i = m68k_num_gregs; i < m68k_num_regs; i++)
collect_register (i, ((char *) buf
+ (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
}
static void
m68k_store_fpregset (const void *buf)
{
int i;
for (i = m68k_num_gregs; i < m68k_num_regs; i++)
supply_register (i, ((const char *) buf
+ (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
}
#endif /* HAVE_PTRACE_GETREGS */
struct regset_info target_regsets[] = {
#ifdef HAVE_PTRACE_GETREGS
{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
GENERAL_REGS,
m68k_fill_gregset, m68k_store_gregset },
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
FP_REGS,
m68k_fill_fpregset, m68k_store_fpregset },
#endif /* HAVE_PTRACE_GETREGS */
{ 0, 0, -1, -1, NULL, NULL }
};
static const unsigned char m68k_breakpoint[] = { 0x4E, 0x4F };
#define m68k_breakpoint_len 2
static CORE_ADDR
m68k_get_pc ()
{
unsigned long pc;
collect_register_by_name ("pc", &pc);
return pc;
}
static void
m68k_set_pc (CORE_ADDR value)
{
unsigned long newpc = value;
supply_register_by_name ("pc", &newpc);
}
static int
m68k_breakpoint_at (CORE_ADDR pc)
{
unsigned char c[2];
read_inferior_memory (pc, c, 2);
if (c[0] == 0x4E && c[1] == 0x4F)
return 1;
return 0;
}
struct linux_target_ops the_low_target = {
init_registers_m68k,
m68k_num_regs,
m68k_regmap,
m68k_cannot_fetch_register,
m68k_cannot_store_register,
m68k_get_pc,
m68k_set_pc,
m68k_breakpoint,
m68k_breakpoint_len,
NULL,
2,
m68k_breakpoint_at,
};
|
