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
|
/* GNU/Linux/CRIS specific low level interface, for the remote server for GDB.
Copyright (C) 1995-2014 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"
#include <sys/ptrace.h>
/* Defined in auto-generated file reg-cris.c. */
void init_registers_cris (void);
extern const struct target_desc *tdesc_cris;
/* CRISv10 */
#define cris_num_regs 32
/* Locations need to match <include/asm/arch/ptrace.h>. */
static int cris_regmap[] = {
15*4, 14*4, 13*4, 12*4,
11*4, 10*4, 9*4, 8*4,
7*4, 6*4, 5*4, 4*4,
3*4, 2*4, 23*4, 19*4,
-1, -1, -1, -1,
-1, 17*4, -1, 16*4,
-1, -1, -1, 18*4,
-1, 17*4, -1, -1
};
static int
cris_cannot_store_register (int regno)
{
if (cris_regmap[regno] == -1)
return 1;
return (regno >= cris_num_regs);
}
static int
cris_cannot_fetch_register (int regno)
{
if (cris_regmap[regno] == -1)
return 1;
return (regno >= cris_num_regs);
}
extern int debug_threads;
static CORE_ADDR
cris_get_pc (struct regcache *regcache, void)
{
unsigned long pc;
collect_register_by_name (regcache, "pc", &pc);
if (debug_threads)
debug_printf ("stop pc is %08lx\n", pc);
return pc;
}
static void
cris_set_pc (struct regcache *regcache, CORE_ADDR pc)
{
unsigned long newpc = pc;
supply_register_by_name (regcache, "pc", &newpc);
}
static const unsigned short cris_breakpoint = 0xe938;
#define cris_breakpoint_len 2
static int
cris_breakpoint_at (CORE_ADDR where)
{
unsigned short insn;
(*the_target->read_memory) (where, (unsigned char *) &insn,
cris_breakpoint_len);
if (insn == cris_breakpoint)
return 1;
/* If necessary, recognize more trap instructions here. GDB only uses the
one. */
return 0;
}
/* We only place breakpoints in empty marker functions, and thread locking
is outside of the function. So rather than importing software single-step,
we can just run until exit. */
static CORE_ADDR
cris_reinsert_addr (void)
{
struct regcache *regcache = get_thread_regcache (current_inferior, 1);
unsigned long pc;
collect_register_by_name (regcache, "srp", &pc);
return pc;
}
static void
cris_arch_setup (void)
{
current_process ()->tdesc = tdesc_cris;
}
static struct usrregs_info cris_usrregs_info =
{
cris_num_regs,
cris_regmap,
};
static struct regs_info regs_info =
{
NULL, /* regset_bitmap */
&cris_usrregs_info,
};
static const struct regs_info *
cris_regs_info (void)
{
return ®s_info;
}
struct linux_target_ops the_low_target = {
cris_arch_setup,
cris_regs_info,
cris_cannot_fetch_register,
cris_cannot_store_register,
NULL, /* fetch_register */
cris_get_pc,
cris_set_pc,
(const unsigned char *) &cris_breakpoint,
cris_breakpoint_len,
cris_reinsert_addr,
0,
cris_breakpoint_at,
0,
0,
0,
0,
};
void
initialize_low_arch (void)
{
init_registers_cris ();
}
|
