Commit | Line | Data |
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c906108c SS |
1 | /* Generic simulator resume. |
2 | Copyright (C) 1997 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 "sim-main.h" | |
22 | #include "sim-assert.h" | |
23 | ||
24 | /* Halt the simulator after just one instruction */ | |
25 | ||
26 | static void | |
27 | has_stepped (SIM_DESC sd, | |
28 | void *data) | |
29 | { | |
30 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
31 | sim_engine_halt (sd, NULL, NULL, NULL_CIA, sim_stopped, SIM_SIGTRAP); | |
32 | } | |
33 | ||
34 | ||
35 | /* Generic resume - assumes the existance of sim_engine_run */ | |
36 | ||
37 | void | |
38 | sim_resume (SIM_DESC sd, | |
39 | int step, | |
40 | int siggnal) | |
41 | { | |
42 | sim_engine *engine = STATE_ENGINE (sd); | |
43 | jmp_buf buf; | |
44 | int jmpval; | |
45 | ||
46 | ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); | |
47 | ||
48 | /* we only want to be single stepping the simulator once */ | |
49 | if (engine->stepper != NULL) | |
50 | { | |
51 | sim_events_deschedule (sd, engine->stepper); | |
52 | engine->stepper = NULL; | |
53 | } | |
54 | if (step) | |
55 | engine->stepper = sim_events_schedule (sd, 1, has_stepped, sd); | |
56 | ||
57 | sim_module_resume (sd); | |
58 | ||
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) | |
64 | { | |
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); | |
39248af8 | 68 | int sig_to_deliver; |
c906108c SS |
69 | |
70 | sim_events_preprocess (sd, last_cpu_nr >= nr_cpus, next_cpu_nr >= nr_cpus); | |
71 | if (next_cpu_nr >= nr_cpus) | |
72 | next_cpu_nr = 0; | |
73 | ||
39248af8 AC |
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; | |
80 | else | |
81 | sig_to_deliver = 0; | |
43e526b9 | 82 | |
c906108c SS |
83 | #ifdef SIM_CPU_EXCEPTION_RESUME |
84 | { | |
85 | sim_cpu* cpu = STATE_CPU (sd, next_cpu_nr); | |
39248af8 | 86 | SIM_CPU_EXCEPTION_RESUME(sd, cpu, sig_to_deliver); |
c906108c SS |
87 | } |
88 | #endif | |
89 | ||
39248af8 | 90 | sim_engine_run (sd, next_cpu_nr, nr_cpus, sig_to_deliver); |
c906108c SS |
91 | } |
92 | engine->jmpbuf = NULL; | |
93 | ||
94 | sim_module_suspend (sd); | |
95 | } |