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c906108c | 1 | /* Generic simulator halt/restart. |
3666a048 | 2 | Copyright (C) 1997-2021 Free Software Foundation, Inc. |
c906108c SS |
3 | Contributed by Cygnus Support. |
4 | ||
5 | This file is part of GDB, the GNU debugger. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
4744ac1b JB |
9 | the Free Software Foundation; either version 3 of the License, or |
10 | (at your option) any later version. | |
c906108c SS |
11 | |
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
4744ac1b JB |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 19 | |
6df01ab8 MF |
20 | /* This must come before any other includes. */ |
21 | #include "defs.h" | |
22 | ||
20a8e078 MF |
23 | #include <stdio.h> |
24 | #include <stdlib.h> | |
25 | ||
c906108c SS |
26 | #include "sim-main.h" |
27 | #include "sim-assert.h" | |
1fef66b0 | 28 | #include "sim-signal.h" |
c906108c SS |
29 | |
30 | /* Get the run state. | |
31 | REASON/SIGRC are the values returned by sim_stop_reason. | |
32 | ??? Should each cpu have its own copy? */ | |
33 | ||
34 | void | |
35 | sim_engine_get_run_state (SIM_DESC sd, enum sim_stop *reason, int *sigrc) | |
36 | { | |
37 | sim_engine *engine = STATE_ENGINE (sd); | |
38 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
39 | *reason = engine->reason; | |
40 | *sigrc = engine->sigrc; | |
41 | } | |
42 | ||
43 | /* Set the run state to REASON/SIGRC. | |
44 | REASON/SIGRC are the values returned by sim_stop_reason. | |
45 | ??? Should each cpu have its own copy? */ | |
46 | ||
47 | void | |
48 | sim_engine_set_run_state (SIM_DESC sd, enum sim_stop reason, int sigrc) | |
49 | { | |
50 | sim_engine *engine = STATE_ENGINE (sd); | |
51 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
52 | engine->reason = reason; | |
53 | engine->sigrc = sigrc; | |
54 | } | |
55 | ||
56 | /* Generic halt */ | |
57 | ||
58 | void | |
59 | sim_engine_halt (SIM_DESC sd, | |
60 | sim_cpu *last_cpu, | |
61 | sim_cpu *next_cpu, /* NULL - use default */ | |
62 | sim_cia cia, | |
63 | enum sim_stop reason, | |
64 | int sigrc) | |
65 | { | |
66 | sim_engine *engine = STATE_ENGINE (sd); | |
67 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
68 | if (engine->jmpbuf != NULL) | |
69 | { | |
70 | jmp_buf *halt_buf = engine->jmpbuf; | |
71 | engine->last_cpu = last_cpu; | |
72 | engine->next_cpu = next_cpu; | |
73 | engine->reason = reason; | |
74 | engine->sigrc = sigrc; | |
75 | ||
76 | SIM_ENGINE_HALT_HOOK (sd, last_cpu, cia); | |
77 | ||
78 | #ifdef SIM_CPU_EXCEPTION_SUSPEND | |
79 | if (last_cpu != NULL && reason != sim_exited) | |
80 | SIM_CPU_EXCEPTION_SUSPEND (sd, last_cpu, sim_signal_to_host (sd, sigrc)); | |
81 | #endif | |
82 | ||
83 | longjmp (*halt_buf, sim_engine_halt_jmpval); | |
84 | } | |
85 | else | |
876fec02 AC |
86 | { |
87 | sim_io_error (sd, "sim_halt - bad long jump"); | |
88 | abort (); | |
89 | } | |
c906108c SS |
90 | } |
91 | ||
92 | ||
93 | /* Generic restart */ | |
94 | ||
95 | void | |
96 | sim_engine_restart (SIM_DESC sd, | |
97 | sim_cpu *last_cpu, | |
98 | sim_cpu *next_cpu, | |
99 | sim_cia cia) | |
100 | { | |
101 | sim_engine *engine = STATE_ENGINE (sd); | |
102 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
103 | if (engine->jmpbuf != NULL) | |
104 | { | |
105 | jmp_buf *halt_buf = engine->jmpbuf; | |
106 | engine->last_cpu = last_cpu; | |
107 | engine->next_cpu = next_cpu; | |
108 | SIM_ENGINE_RESTART_HOOK (sd, last_cpu, cia); | |
109 | longjmp (*halt_buf, sim_engine_restart_jmpval); | |
110 | } | |
111 | else | |
112 | sim_io_error (sd, "sim_restart - bad long jump"); | |
113 | } | |
114 | ||
115 | ||
116 | /* Generic error code */ | |
117 | ||
118 | void | |
119 | sim_engine_vabort (SIM_DESC sd, | |
120 | sim_cpu *cpu, | |
121 | sim_cia cia, | |
122 | const char *fmt, | |
123 | va_list ap) | |
124 | { | |
125 | ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
126 | if (sd == NULL) | |
127 | { | |
128 | vfprintf (stderr, fmt, ap); | |
129 | fprintf (stderr, "\nQuit\n"); | |
130 | abort (); | |
131 | } | |
132 | else if (STATE_ENGINE (sd)->jmpbuf == NULL) | |
133 | { | |
134 | sim_io_evprintf (sd, fmt, ap); | |
135 | sim_io_eprintf (sd, "\n"); | |
136 | sim_io_error (sd, "Quit Simulator"); | |
876fec02 | 137 | abort (); |
c906108c SS |
138 | } |
139 | else | |
140 | { | |
141 | sim_io_evprintf (sd, fmt, ap); | |
142 | sim_io_eprintf (sd, "\n"); | |
143 | sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGABRT); | |
144 | } | |
145 | } | |
146 | ||
147 | void | |
148 | sim_engine_abort (SIM_DESC sd, | |
149 | sim_cpu *cpu, | |
150 | sim_cia cia, | |
151 | const char *fmt, | |
152 | ...) | |
153 | { | |
154 | va_list ap; | |
155 | ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
34b47c38 | 156 | va_start (ap, fmt); |
c906108c SS |
157 | sim_engine_vabort (sd, cpu, cia, fmt, ap); |
158 | va_end (ap); | |
159 | } | |
160 | ||
161 | ||
162 | /* Generic next/last cpu */ | |
163 | ||
164 | int | |
165 | sim_engine_last_cpu_nr (SIM_DESC sd) | |
166 | { | |
167 | sim_engine *engine = STATE_ENGINE (sd); | |
168 | if (engine->last_cpu != NULL) | |
169 | return engine->last_cpu - STATE_CPU (sd, 0); | |
170 | else | |
171 | return MAX_NR_PROCESSORS; | |
172 | } | |
173 | ||
174 | int | |
175 | sim_engine_next_cpu_nr (SIM_DESC sd) | |
176 | { | |
177 | sim_engine *engine = STATE_ENGINE (sd); | |
178 | if (engine->next_cpu != NULL) | |
179 | return engine->next_cpu - STATE_CPU (sd, 0); | |
180 | else | |
181 | return sim_engine_last_cpu_nr (sd) + 1; | |
182 | } | |
183 | ||
184 | int | |
185 | sim_engine_nr_cpus (SIM_DESC sd) | |
186 | { | |
187 | sim_engine *engine = STATE_ENGINE (sd); | |
188 | return engine->nr_cpus; | |
189 | } | |
190 | ||
191 | ||
192 | ||
193 | ||
194 | /* Initialization */ | |
195 | ||
196 | static SIM_RC | |
197 | sim_engine_init (SIM_DESC sd) | |
198 | { | |
199 | /* initialize the start/stop/resume engine */ | |
200 | sim_engine *engine = STATE_ENGINE (sd); | |
201 | engine->jmpbuf = NULL; | |
202 | engine->last_cpu = NULL; | |
203 | engine->next_cpu = NULL; | |
204 | engine->nr_cpus = MAX_NR_PROCESSORS; | |
205 | engine->reason = sim_running; | |
206 | engine->sigrc = 0; | |
207 | engine->stepper = NULL; /* sim_events_init will clean it up */ | |
208 | return SIM_RC_OK; | |
209 | } | |
210 | ||
05d54a04 MF |
211 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
212 | SIM_RC sim_install_engine (SIM_DESC sd); | |
c906108c SS |
213 | |
214 | SIM_RC | |
05d54a04 | 215 | sim_install_engine (SIM_DESC sd) |
c906108c SS |
216 | { |
217 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
218 | sim_module_add_init_fn (sd, sim_engine_init); | |
219 | return SIM_RC_OK; | |
220 | } |