1 /* Generic simulator resume.
2 Copyright (C) 1997-2023 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
5 This file is part of GDB, the GNU debugger.
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 3 of the License, or
10 (at your option) any later version.
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.
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/>. */
20 /* This must come before any other includes. */
24 #include "sim-assert.h"
25 #include "sim-signal.h"
27 /* Halt the simulator after just one instruction */
30 has_stepped (SIM_DESC sd
,
33 ASSERT (STATE_MAGIC (sd
) == SIM_MAGIC_NUMBER
);
34 sim_engine_halt (sd
, NULL
, NULL
, NULL_CIA
, sim_stopped
, SIM_SIGTRAP
);
38 /* Generic resume - assumes the existance of sim_engine_run */
41 sim_resume (SIM_DESC sd
,
45 sim_engine
*engine
= STATE_ENGINE (sd
);
49 ASSERT (STATE_MAGIC (sd
) == SIM_MAGIC_NUMBER
);
51 /* we only want to be single stepping the simulator once */
52 if (engine
->stepper
!= NULL
)
54 sim_events_deschedule (sd
, engine
->stepper
);
55 engine
->stepper
= NULL
;
58 engine
->stepper
= sim_events_schedule (sd
, 1, has_stepped
, sd
);
60 sim_module_resume (sd
);
62 /* run/resume the simulator */
63 engine
->jmpbuf
= &buf
;
64 jmpval
= setjmp (buf
);
65 if (jmpval
== sim_engine_start_jmpval
66 || jmpval
== sim_engine_restart_jmpval
)
68 int last_cpu_nr
= sim_engine_last_cpu_nr (sd
);
69 int next_cpu_nr
= sim_engine_next_cpu_nr (sd
);
70 int nr_cpus
= sim_engine_nr_cpus (sd
);
73 sim_events_preprocess (sd
, last_cpu_nr
>= nr_cpus
, next_cpu_nr
>= nr_cpus
);
74 if (next_cpu_nr
>= nr_cpus
)
77 /* Only deliver the SIGGNAL [sic] the first time through - don't
78 re-deliver any SIGGNAL during a restart. NOTE: A new local
79 variable is used to avoid problems with the automatic
80 variable ``siggnal'' being trashed by a long jump. */
81 if (jmpval
== sim_engine_start_jmpval
)
82 sig_to_deliver
= siggnal
;
86 #ifdef SIM_CPU_EXCEPTION_RESUME
88 sim_cpu
* cpu
= STATE_CPU (sd
, next_cpu_nr
);
89 SIM_CPU_EXCEPTION_RESUME (sd
, cpu
, sig_to_deliver
);
93 sim_engine_run (sd
, next_cpu_nr
, nr_cpus
, sig_to_deliver
);
95 engine
->jmpbuf
= NULL
;
97 sim_module_suspend (sd
);