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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/* Generic simulator halt/restart.
Copyright (C) 1997-2024 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB, the GNU debugger.
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/>. */
/* This must come before any other includes. */
#include "defs.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "sim-main.h"
#include "sim-assert.h"
#include "sim-signal.h"
/* Get the run state.
REASON/SIGRC are the values returned by sim_stop_reason.
??? Should each cpu have its own copy? */
void
sim_engine_get_run_state (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
*reason = engine->reason;
*sigrc = engine->sigrc;
}
/* Set the run state to REASON/SIGRC.
REASON/SIGRC are the values returned by sim_stop_reason.
??? Should each cpu have its own copy? */
void
sim_engine_set_run_state (SIM_DESC sd, enum sim_stop reason, int sigrc)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
engine->reason = reason;
engine->sigrc = sigrc;
}
/* Generic halt */
void
sim_engine_halt (SIM_DESC sd,
sim_cpu *last_cpu,
sim_cpu *next_cpu, /* NULL - use default */
sim_cia cia,
enum sim_stop reason,
int sigrc)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
if (engine->jmpbuf != NULL)
{
jmp_buf *halt_buf = engine->jmpbuf;
engine->last_cpu = last_cpu;
engine->next_cpu = next_cpu;
engine->reason = reason;
engine->sigrc = sigrc;
SIM_ENGINE_HALT_HOOK (sd, last_cpu, cia);
#ifdef SIM_CPU_EXCEPTION_SUSPEND
if (last_cpu != NULL && reason != sim_exited)
SIM_CPU_EXCEPTION_SUSPEND (sd, last_cpu, sim_signal_to_host (sd, sigrc));
#endif
longjmp (*halt_buf, sim_engine_halt_jmpval);
}
else
{
sim_io_error (sd, "sim_halt - bad long jump");
abort ();
}
}
/* Generic restart */
void
sim_engine_restart (SIM_DESC sd,
sim_cpu *last_cpu,
sim_cpu *next_cpu,
sim_cia cia)
{
sim_engine *engine = STATE_ENGINE (sd);
ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
if (engine->jmpbuf != NULL)
{
jmp_buf *halt_buf = engine->jmpbuf;
engine->last_cpu = last_cpu;
engine->next_cpu = next_cpu;
SIM_ENGINE_RESTART_HOOK (sd, last_cpu, cia);
longjmp (*halt_buf, sim_engine_restart_jmpval);
}
else
sim_io_error (sd, "sim_restart - bad long jump");
}
/* Generic error code */
void
sim_engine_vabort (SIM_DESC sd,
sim_cpu *cpu,
sim_cia cia,
const char *fmt,
va_list ap)
{
ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
if (sd == NULL)
{
vfprintf (stderr, fmt, ap);
fprintf (stderr, "\nQuit\n");
abort ();
}
else if (STATE_ENGINE (sd)->jmpbuf == NULL)
{
sim_io_evprintf (sd, fmt, ap);
sim_io_eprintf (sd, "\n");
sim_io_error (sd, "Quit Simulator");
abort ();
}
else
{
sim_io_evprintf (sd, fmt, ap);
sim_io_eprintf (sd, "\n");
sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGABRT);
}
}
void
sim_engine_abort (SIM_DESC sd,
sim_cpu *cpu,
sim_cia cia,
const char *fmt,
...)
{
va_list ap;
ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
va_start (ap, fmt);
sim_engine_vabort (sd, cpu, cia, fmt, ap);
va_end (ap);
}
/* Generic next/last cpu */
int
sim_engine_last_cpu_nr (SIM_DESC sd)
{
sim_engine *engine = STATE_ENGINE (sd);
if (engine->last_cpu != NULL)
return engine->last_cpu - STATE_CPU (sd, 0);
else
return MAX_NR_PROCESSORS;
}
int
sim_engine_next_cpu_nr (SIM_DESC sd)
{
sim_engine *engine = STATE_ENGINE (sd);
if (engine->next_cpu != NULL)
return engine->next_cpu - STATE_CPU (sd, 0);
else
return sim_engine_last_cpu_nr (sd) + 1;
}
int
sim_engine_nr_cpus (SIM_DESC sd)
{
sim_engine *engine = STATE_ENGINE (sd);
return engine->nr_cpus;
}
/* Initialization */
static SIM_RC
sim_engine_init (SIM_DESC sd)
{
/* initialize the start/stop/resume engine */
sim_engine *engine = STATE_ENGINE (sd);
engine->jmpbuf = NULL;
engine->last_cpu = NULL;
engine->next_cpu = NULL;
engine->nr_cpus = MAX_NR_PROCESSORS;
engine->reason = sim_running;
engine->sigrc = 0;
engine->stepper = NULL; /* sim_events_init will clean it up */
return SIM_RC_OK;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
SIM_RC sim_install_engine (SIM_DESC sd);
SIM_RC
sim_install_engine (SIM_DESC sd)
{
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
sim_module_add_init_fn (sd, sim_engine_init);
return SIM_RC_OK;
}
|
