1 /* Generic simulator resume.
2 Copyright (C) 1997, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Support.
6 This file is part of GDB, the GNU debugger.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "sim-assert.h"
24 /* Halt the simulator after just one instruction */
27 has_stepped (SIM_DESC sd,
30 ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
31 sim_engine_halt (sd, NULL, NULL, NULL_CIA, sim_stopped, SIM_SIGTRAP);
35 /* Generic resume - assumes the existance of sim_engine_run */
38 sim_resume (SIM_DESC sd,
42 sim_engine *engine = STATE_ENGINE (sd);
46 ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
48 /* we only want to be single stepping the simulator once */
49 if (engine->stepper != NULL)
51 sim_events_deschedule (sd, engine->stepper);
52 engine->stepper = NULL;
55 engine->stepper = sim_events_schedule (sd, 1, has_stepped, sd);
57 sim_module_resume (sd);
59 /* run/resume the simulator */
60 engine->jmpbuf = &buf;
61 jmpval = setjmp (buf);
62 if (jmpval == sim_engine_start_jmpval
63 || jmpval == sim_engine_restart_jmpval)
65 int last_cpu_nr = sim_engine_last_cpu_nr (sd);
66 int next_cpu_nr = sim_engine_next_cpu_nr (sd);
67 int nr_cpus = sim_engine_nr_cpus (sd);
70 sim_events_preprocess (sd, last_cpu_nr >= nr_cpus, next_cpu_nr >= nr_cpus);
71 if (next_cpu_nr >= nr_cpus)
74 /* Only deliver the SIGGNAL [sic] the first time through - don't
75 re-deliver any SIGGNAL during a restart. NOTE: A new local
76 variable is used to avoid problems with the automatic
77 variable ``siggnal'' being trashed by a long jump. */
78 if (jmpval == sim_engine_start_jmpval)
79 sig_to_deliver = siggnal;
83 #ifdef SIM_CPU_EXCEPTION_RESUME
85 sim_cpu* cpu = STATE_CPU (sd, next_cpu_nr);
86 SIM_CPU_EXCEPTION_RESUME(sd, cpu, sig_to_deliver);
90 sim_engine_run (sd, next_cpu_nr, nr_cpus, sig_to_deliver);
92 engine->jmpbuf = NULL;
94 sim_module_suspend (sd);