Commit | Line | Data |
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c906108c SS |
1 | /* Generic simulator halt/restart. |
2 | Copyright (C) 1997, 1998 Free Software Foundation, Inc. | |
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 | |
82 | sim_io_error (sd, "sim_halt - bad long jump"); | |
83 | } | |
84 | ||
85 | ||
86 | /* Generic restart */ | |
87 | ||
88 | void | |
89 | sim_engine_restart (SIM_DESC sd, | |
90 | sim_cpu *last_cpu, | |
91 | sim_cpu *next_cpu, | |
92 | sim_cia cia) | |
93 | { | |
94 | sim_engine *engine = STATE_ENGINE (sd); | |
95 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
96 | if (engine->jmpbuf != NULL) | |
97 | { | |
98 | jmp_buf *halt_buf = engine->jmpbuf; | |
99 | engine->last_cpu = last_cpu; | |
100 | engine->next_cpu = next_cpu; | |
101 | SIM_ENGINE_RESTART_HOOK (sd, last_cpu, cia); | |
102 | longjmp (*halt_buf, sim_engine_restart_jmpval); | |
103 | } | |
104 | else | |
105 | sim_io_error (sd, "sim_restart - bad long jump"); | |
106 | } | |
107 | ||
108 | ||
109 | /* Generic error code */ | |
110 | ||
111 | void | |
112 | sim_engine_vabort (SIM_DESC sd, | |
113 | sim_cpu *cpu, | |
114 | sim_cia cia, | |
115 | const char *fmt, | |
116 | va_list ap) | |
117 | { | |
118 | ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
119 | if (sd == NULL) | |
120 | { | |
121 | vfprintf (stderr, fmt, ap); | |
122 | fprintf (stderr, "\nQuit\n"); | |
123 | abort (); | |
124 | } | |
125 | else if (STATE_ENGINE (sd)->jmpbuf == NULL) | |
126 | { | |
127 | sim_io_evprintf (sd, fmt, ap); | |
128 | sim_io_eprintf (sd, "\n"); | |
129 | sim_io_error (sd, "Quit Simulator"); | |
130 | } | |
131 | else | |
132 | { | |
133 | sim_io_evprintf (sd, fmt, ap); | |
134 | sim_io_eprintf (sd, "\n"); | |
135 | sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGABRT); | |
136 | } | |
137 | } | |
138 | ||
139 | void | |
140 | sim_engine_abort (SIM_DESC sd, | |
141 | sim_cpu *cpu, | |
142 | sim_cia cia, | |
143 | const char *fmt, | |
144 | ...) | |
145 | { | |
146 | va_list ap; | |
147 | ASSERT (sd == NULL || STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
148 | va_start(ap, fmt); | |
149 | sim_engine_vabort (sd, cpu, cia, fmt, ap); | |
150 | va_end (ap); | |
151 | } | |
152 | ||
153 | ||
154 | /* Generic next/last cpu */ | |
155 | ||
156 | int | |
157 | sim_engine_last_cpu_nr (SIM_DESC sd) | |
158 | { | |
159 | sim_engine *engine = STATE_ENGINE (sd); | |
160 | if (engine->last_cpu != NULL) | |
161 | return engine->last_cpu - STATE_CPU (sd, 0); | |
162 | else | |
163 | return MAX_NR_PROCESSORS; | |
164 | } | |
165 | ||
166 | int | |
167 | sim_engine_next_cpu_nr (SIM_DESC sd) | |
168 | { | |
169 | sim_engine *engine = STATE_ENGINE (sd); | |
170 | if (engine->next_cpu != NULL) | |
171 | return engine->next_cpu - STATE_CPU (sd, 0); | |
172 | else | |
173 | return sim_engine_last_cpu_nr (sd) + 1; | |
174 | } | |
175 | ||
176 | int | |
177 | sim_engine_nr_cpus (SIM_DESC sd) | |
178 | { | |
179 | sim_engine *engine = STATE_ENGINE (sd); | |
180 | return engine->nr_cpus; | |
181 | } | |
182 | ||
183 | ||
184 | ||
185 | ||
186 | /* Initialization */ | |
187 | ||
188 | static SIM_RC | |
189 | sim_engine_init (SIM_DESC sd) | |
190 | { | |
191 | /* initialize the start/stop/resume engine */ | |
192 | sim_engine *engine = STATE_ENGINE (sd); | |
193 | engine->jmpbuf = NULL; | |
194 | engine->last_cpu = NULL; | |
195 | engine->next_cpu = NULL; | |
196 | engine->nr_cpus = MAX_NR_PROCESSORS; | |
197 | engine->reason = sim_running; | |
198 | engine->sigrc = 0; | |
199 | engine->stepper = NULL; /* sim_events_init will clean it up */ | |
200 | return SIM_RC_OK; | |
201 | } | |
202 | ||
203 | ||
204 | SIM_RC | |
205 | sim_engine_install (SIM_DESC sd) | |
206 | { | |
207 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
208 | sim_module_add_init_fn (sd, sim_engine_init); | |
209 | return SIM_RC_OK; | |
210 | } |