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c906108c | 1 | /* Generic simulator halt/restart. |
6aba47ca | 2 | Copyright (C) 1997, 1998, 2007 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 | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
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 | ||
17 | You should have received a copy of the GNU General Public License along | |
18 | with this program; if not, write to the Free Software Foundation, Inc., | |
19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include <stdio.h> | |
22 | ||
23 | #include "sim-main.h" | |
24 | #include "sim-assert.h" | |
25 | ||
26 | /* Get the run state. | |
27 | REASON/SIGRC are the values returned by sim_stop_reason. | |
28 | ??? Should each cpu have its own copy? */ | |
29 | ||
30 | void | |
31 | sim_engine_get_run_state (SIM_DESC sd, enum sim_stop *reason, int *sigrc) | |
32 | { | |
33 | sim_engine *engine = STATE_ENGINE (sd); | |
34 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
35 | *reason = engine->reason; | |
36 | *sigrc = engine->sigrc; | |
37 | } | |
38 | ||
39 | /* Set the run state to REASON/SIGRC. | |
40 | REASON/SIGRC are the values returned by sim_stop_reason. | |
41 | ??? Should each cpu have its own copy? */ | |
42 | ||
43 | void | |
44 | sim_engine_set_run_state (SIM_DESC sd, enum sim_stop reason, int sigrc) | |
45 | { | |
46 | sim_engine *engine = STATE_ENGINE (sd); | |
47 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
48 | engine->reason = reason; | |
49 | engine->sigrc = sigrc; | |
50 | } | |
51 | ||
52 | /* Generic halt */ | |
53 | ||
54 | void | |
55 | sim_engine_halt (SIM_DESC sd, | |
56 | sim_cpu *last_cpu, | |
57 | sim_cpu *next_cpu, /* NULL - use default */ | |
58 | sim_cia cia, | |
59 | enum sim_stop reason, | |
60 | int sigrc) | |
61 | { | |
62 | sim_engine *engine = STATE_ENGINE (sd); | |
63 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
64 | if (engine->jmpbuf != NULL) | |
65 | { | |
66 | jmp_buf *halt_buf = engine->jmpbuf; | |
67 | engine->last_cpu = last_cpu; | |
68 | engine->next_cpu = next_cpu; | |
69 | engine->reason = reason; | |
70 | engine->sigrc = sigrc; | |
71 | ||
72 | SIM_ENGINE_HALT_HOOK (sd, last_cpu, cia); | |
73 | ||
74 | #ifdef SIM_CPU_EXCEPTION_SUSPEND | |
75 | if (last_cpu != NULL && reason != sim_exited) | |
76 | SIM_CPU_EXCEPTION_SUSPEND (sd, last_cpu, sim_signal_to_host (sd, sigrc)); | |
77 | #endif | |
78 | ||
79 | longjmp (*halt_buf, sim_engine_halt_jmpval); | |
80 | } | |
81 | else | |
876fec02 AC |
82 | { |
83 | sim_io_error (sd, "sim_halt - bad long jump"); | |
84 | abort (); | |
85 | } | |
c906108c SS |
86 | } |
87 | ||
88 | ||
89 | /* Generic restart */ | |
90 | ||
91 | void | |
92 | sim_engine_restart (SIM_DESC sd, | |
93 | sim_cpu *last_cpu, | |
94 | sim_cpu *next_cpu, | |
95 | sim_cia cia) | |
96 | { | |
97 | sim_engine *engine = STATE_ENGINE (sd); | |
98 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
99 | if (engine->jmpbuf != NULL) | |
100 | { | |
101 | jmp_buf *halt_buf = engine->jmpbuf; | |
102 | engine->last_cpu = last_cpu; | |
103 | engine->next_cpu = next_cpu; | |
104 | SIM_ENGINE_RESTART_HOOK (sd, last_cpu, cia); | |
105 | longjmp (*halt_buf, sim_engine_restart_jmpval); | |
106 | } | |
107 | else | |
108 | sim_io_error (sd, "sim_restart - bad long jump"); | |
109 | } | |
110 | ||
111 | ||
112 | /* Generic error code */ | |
113 | ||
114 | void | |
115 | sim_engine_vabort (SIM_DESC sd, | |
116 | sim_cpu *cpu, | |
117 | sim_cia cia, | |
118 | const char *fmt, | |
119 | va_list ap) | |
120 | { | |
121 | ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
122 | if (sd == NULL) | |
123 | { | |
124 | vfprintf (stderr, fmt, ap); | |
125 | fprintf (stderr, "\nQuit\n"); | |
126 | abort (); | |
127 | } | |
128 | else if (STATE_ENGINE (sd)->jmpbuf == NULL) | |
129 | { | |
130 | sim_io_evprintf (sd, fmt, ap); | |
131 | sim_io_eprintf (sd, "\n"); | |
132 | sim_io_error (sd, "Quit Simulator"); | |
876fec02 | 133 | abort (); |
c906108c SS |
134 | } |
135 | else | |
136 | { | |
137 | sim_io_evprintf (sd, fmt, ap); | |
138 | sim_io_eprintf (sd, "\n"); | |
139 | sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGABRT); | |
140 | } | |
141 | } | |
142 | ||
143 | void | |
144 | sim_engine_abort (SIM_DESC sd, | |
145 | sim_cpu *cpu, | |
146 | sim_cia cia, | |
147 | const char *fmt, | |
148 | ...) | |
149 | { | |
150 | va_list ap; | |
151 | ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
152 | va_start(ap, fmt); | |
153 | sim_engine_vabort (sd, cpu, cia, fmt, ap); | |
154 | va_end (ap); | |
155 | } | |
156 | ||
157 | ||
158 | /* Generic next/last cpu */ | |
159 | ||
160 | int | |
161 | sim_engine_last_cpu_nr (SIM_DESC sd) | |
162 | { | |
163 | sim_engine *engine = STATE_ENGINE (sd); | |
164 | if (engine->last_cpu != NULL) | |
165 | return engine->last_cpu - STATE_CPU (sd, 0); | |
166 | else | |
167 | return MAX_NR_PROCESSORS; | |
168 | } | |
169 | ||
170 | int | |
171 | sim_engine_next_cpu_nr (SIM_DESC sd) | |
172 | { | |
173 | sim_engine *engine = STATE_ENGINE (sd); | |
174 | if (engine->next_cpu != NULL) | |
175 | return engine->next_cpu - STATE_CPU (sd, 0); | |
176 | else | |
177 | return sim_engine_last_cpu_nr (sd) + 1; | |
178 | } | |
179 | ||
180 | int | |
181 | sim_engine_nr_cpus (SIM_DESC sd) | |
182 | { | |
183 | sim_engine *engine = STATE_ENGINE (sd); | |
184 | return engine->nr_cpus; | |
185 | } | |
186 | ||
187 | ||
188 | ||
189 | ||
190 | /* Initialization */ | |
191 | ||
192 | static SIM_RC | |
193 | sim_engine_init (SIM_DESC sd) | |
194 | { | |
195 | /* initialize the start/stop/resume engine */ | |
196 | sim_engine *engine = STATE_ENGINE (sd); | |
197 | engine->jmpbuf = NULL; | |
198 | engine->last_cpu = NULL; | |
199 | engine->next_cpu = NULL; | |
200 | engine->nr_cpus = MAX_NR_PROCESSORS; | |
201 | engine->reason = sim_running; | |
202 | engine->sigrc = 0; | |
203 | engine->stepper = NULL; /* sim_events_init will clean it up */ | |
204 | return SIM_RC_OK; | |
205 | } | |
206 | ||
207 | ||
208 | SIM_RC | |
209 | sim_engine_install (SIM_DESC sd) | |
210 | { | |
211 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
212 | sim_module_add_init_fn (sd, sim_engine_init); | |
213 | return SIM_RC_OK; | |
214 | } |