Commit | Line | Data |
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c906108c | 1 | /* Generic simulator resume. |
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 | ||
c906108c SS |
23 | #include "sim-main.h" |
24 | #include "sim-assert.h" | |
25 | ||
26 | /* Halt the simulator after just one instruction */ | |
27 | ||
28 | static void | |
29 | has_stepped (SIM_DESC sd, | |
30 | void *data) | |
31 | { | |
32 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
33 | sim_engine_halt (sd, NULL, NULL, NULL_CIA, sim_stopped, SIM_SIGTRAP); | |
34 | } | |
35 | ||
36 | ||
37 | /* Generic resume - assumes the existance of sim_engine_run */ | |
38 | ||
39 | void | |
40 | sim_resume (SIM_DESC sd, | |
41 | int step, | |
42 | int siggnal) | |
43 | { | |
44 | sim_engine *engine = STATE_ENGINE (sd); | |
45 | jmp_buf buf; | |
46 | int jmpval; | |
47 | ||
48 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
49 | ||
50 | /* we only want to be single stepping the simulator once */ | |
51 | if (engine->stepper != NULL) | |
52 | { | |
53 | sim_events_deschedule (sd, engine->stepper); | |
54 | engine->stepper = NULL; | |
55 | } | |
56 | if (step) | |
57 | engine->stepper = sim_events_schedule (sd, 1, has_stepped, sd); | |
58 | ||
59 | sim_module_resume (sd); | |
60 | ||
61 | /* run/resume the simulator */ | |
62 | engine->jmpbuf = &buf; | |
63 | jmpval = setjmp (buf); | |
64 | if (jmpval == sim_engine_start_jmpval | |
65 | || jmpval == sim_engine_restart_jmpval) | |
66 | { | |
67 | int last_cpu_nr = sim_engine_last_cpu_nr (sd); | |
68 | int next_cpu_nr = sim_engine_next_cpu_nr (sd); | |
69 | int nr_cpus = sim_engine_nr_cpus (sd); | |
39248af8 | 70 | int sig_to_deliver; |
c906108c SS |
71 | |
72 | sim_events_preprocess (sd, last_cpu_nr >= nr_cpus, next_cpu_nr >= nr_cpus); | |
73 | if (next_cpu_nr >= nr_cpus) | |
74 | next_cpu_nr = 0; | |
75 | ||
39248af8 AC |
76 | /* Only deliver the SIGGNAL [sic] the first time through - don't |
77 | re-deliver any SIGGNAL during a restart. NOTE: A new local | |
78 | variable is used to avoid problems with the automatic | |
79 | variable ``siggnal'' being trashed by a long jump. */ | |
80 | if (jmpval == sim_engine_start_jmpval) | |
81 | sig_to_deliver = siggnal; | |
82 | else | |
83 | sig_to_deliver = 0; | |
43e526b9 | 84 | |
c906108c SS |
85 | #ifdef SIM_CPU_EXCEPTION_RESUME |
86 | { | |
87 | sim_cpu* cpu = STATE_CPU (sd, next_cpu_nr); | |
34b47c38 | 88 | SIM_CPU_EXCEPTION_RESUME (sd, cpu, sig_to_deliver); |
c906108c SS |
89 | } |
90 | #endif | |
91 | ||
39248af8 | 92 | sim_engine_run (sd, next_cpu_nr, nr_cpus, sig_to_deliver); |
c906108c SS |
93 | } |
94 | engine->jmpbuf = NULL; | |
95 | ||
96 | sim_module_suspend (sd); | |
97 | } |