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
|
/* GNU/Linux/BFIN specific low level interface, for the remote server for GDB.
Copyright (C) 2005-2016 Free Software Foundation, Inc.
Contributed by Analog Devices, 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 <asm/ptrace.h>
/* Defined in auto-generated file reg-bfin.c. */
void init_registers_bfin (void);
extern const struct target_desc *tdesc_bfin;
static int bfin_regmap[] =
{
PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
PT_P0, PT_P1, PT_P2, PT_P3, PT_P4, PT_P5, PT_USP, PT_FP,
PT_I0, PT_I1, PT_I2, PT_I3, PT_M0, PT_M1, PT_M2, PT_M3,
PT_B0, PT_B1, PT_B2, PT_B3, PT_L0, PT_L1, PT_L2, PT_L3,
PT_A0X, PT_A0W, PT_A1X, PT_A1W, PT_ASTAT, PT_RETS,
PT_LC0, PT_LT0, PT_LB0, PT_LC1, PT_LT1, PT_LB1,
-1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */,
-1 /* PT_USP */, PT_SEQSTAT, PT_SYSCFG, PT_PC, PT_RETX, PT_RETN, PT_RETE,
PT_PC,
};
#define bfin_num_regs ARRAY_SIZE (bfin_regmap)
static int
bfin_cannot_store_register (int regno)
{
return (regno >= bfin_num_regs);
}
static int
bfin_cannot_fetch_register (int regno)
{
return (regno >= bfin_num_regs);
}
static CORE_ADDR
bfin_get_pc (struct regcache *regcache)
{
unsigned long pc;
collect_register_by_name (regcache, "pc", &pc);
return pc;
}
static void
bfin_set_pc (struct regcache *regcache, CORE_ADDR pc)
{
unsigned long newpc = pc;
supply_register_by_name (regcache, "pc", &newpc);
}
#define bfin_breakpoint_len 2
static const gdb_byte bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00};
/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
static const gdb_byte *
bfin_sw_breakpoint_from_kind (int kind, int *size)
{
*size = bfin_breakpoint_len;
return bfin_breakpoint;
}
static int
bfin_breakpoint_at (CORE_ADDR where)
{
unsigned char insn[bfin_breakpoint_len];
read_inferior_memory(where, insn, bfin_breakpoint_len);
if (insn[0] == bfin_breakpoint[0]
&& insn[1] == bfin_breakpoint[1])
return 1;
/* If necessary, recognize more trap instructions here. GDB only uses the
one. */
return 0;
}
static void
bfin_arch_setup (void)
{
current_process ()->tdesc = tdesc_bfin;
}
/* Support for hardware single step. */
static int
bfin_supports_hardware_single_step (void)
{
return 1;
}
static struct usrregs_info bfin_usrregs_info =
{
bfin_num_regs,
bfin_regmap,
};
static struct regs_info regs_info =
{
NULL, /* regset_bitmap */
&bfin_usrregs_info,
};
static const struct regs_info *
bfin_regs_info (void)
{
return ®s_info;
}
struct linux_target_ops the_low_target = {
bfin_arch_setup,
bfin_regs_info,
bfin_cannot_fetch_register,
bfin_cannot_store_register,
NULL, /* fetch_register */
bfin_get_pc,
bfin_set_pc,
NULL, /* breakpoint_kind_from_pc */
bfin_sw_breakpoint_from_kind,
NULL, /* get_next_pcs */
2,
bfin_breakpoint_at,
NULL, /* supports_z_point_type */
NULL, /* insert_point */
NULL, /* remove_point */
NULL, /* stopped_by_watchpoint */
NULL, /* stopped_data_address */
NULL, /* collect_ptrace_register */
NULL, /* supply_ptrace_register */
NULL, /* siginfo_fixup */
NULL, /* new_process */
NULL, /* new_thread */
NULL, /* new_fork */
NULL, /* prepare_to_resume */
NULL, /* process_qsupported */
NULL, /* supports_tracepoints */
NULL, /* get_thread_area */
NULL, /* install_fast_tracepoint_jump_pad */
NULL, /* emit_ops */
NULL, /* get_min_fast_tracepoint_insn_len */
NULL, /* supports_range_stepping */
NULL, /* breakpoint_kind_from_current_state */
bfin_supports_hardware_single_step,
};
void
initialize_low_arch (void)
{
init_registers_bfin ();
}
|
