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15c16493 AC |
1 | /* This file is part of the GDB simulators. |
2 | ||
3 | Copyright (C) 1997, Free Software Foundation | |
4 | Condtributed by Cyngnus Solutions. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | ||
20 | */ | |
21 | ||
22 | ||
23 | ||
24 | #include "sim-main.h" | |
25 | ||
26 | #include "idecode.h" | |
27 | ||
28 | #include <signal.h> | |
29 | ||
d9b75947 AC |
30 | #ifdef HAVE_STRING_H |
31 | #include <string.h> | |
32 | #else | |
33 | #ifdef HAVE_STRINGS_H | |
34 | #include <strings.h> | |
35 | #endif | |
36 | #endif | |
37 | ||
15c16493 AC |
38 | void |
39 | engine_init (SIM_DESC sd) | |
40 | { | |
41 | memset (&STATE_CPU (sd, 0)->reg, 0, sizeof STATE_CPU (sd, 0)->reg); | |
42 | memset (&STATE_CPU (sd, 0)->cia, 0, sizeof STATE_CPU (sd, 0)->cia); | |
43 | CPU_STATE (STATE_CPU (sd, 0)) = sd; | |
44 | } | |
45 | ||
46 | ||
47 | /* Mechanisms for stopping/restarting the simulation */ | |
48 | ||
49 | void | |
50 | engine_error (SIM_DESC sd, | |
abe293a0 | 51 | sim_cpu *cpu, |
15c16493 AC |
52 | instruction_address cia, |
53 | const char *fmt, | |
54 | ...) | |
55 | { | |
56 | va_list ap; | |
57 | va_start (ap, fmt); | |
58 | sim_io_evprintf (sd, fmt, ap); | |
59 | va_end (ap); | |
60 | ||
61 | if (sd->halt_ok) | |
62 | { | |
d5e2c74e | 63 | sim_io_eprintf (sd, "\n"); |
abe293a0 | 64 | engine_halt (sd, cpu, cia, sim_signalled, SIGABRT); |
15c16493 AC |
65 | } |
66 | else | |
67 | sim_io_error (sd, " - aborting simulation"); | |
68 | } | |
69 | ||
70 | void | |
71 | engine_halt (SIM_DESC sd, | |
abe293a0 | 72 | sim_cpu *cpu, |
15c16493 AC |
73 | instruction_address cia, |
74 | enum sim_stop reason, | |
75 | int siggnal) | |
76 | { | |
77 | if (!sd->halt_ok) | |
78 | sim_io_error (sd, "engine_halt - bad longjmp"); | |
79 | sd->reason = reason; | |
80 | sd->siggnal = siggnal; | |
81 | sd->halt_ok = 0; | |
82 | sd->restart_ok = 0; | |
abe293a0 AC |
83 | if (cpu != NULL) |
84 | cpu->cia = cia; | |
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85 | longjmp (sd->path_to_halt, 1); |
86 | } | |
87 | ||
88 | void | |
89 | engine_restart (SIM_DESC sd, | |
abe293a0 | 90 | sim_cpu *cpu, |
15c16493 AC |
91 | instruction_address cia) |
92 | { | |
93 | if (!sd->restart_ok) | |
94 | sim_io_error (sd, "engine_restart - bad longjmp"); | |
95 | sd->restart_ok = 0; | |
abe293a0 | 96 | cpu->cia = cia; |
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97 | longjmp(sd->path_to_restart, 1); |
98 | } | |
99 | ||
100 | ||
101 | void | |
102 | engine_run_until_stop (SIM_DESC sd, | |
103 | volatile int *keep_running) | |
104 | { | |
105 | if (!setjmp (sd->path_to_halt)) | |
106 | { | |
107 | instruction_address cia; | |
abe293a0 | 108 | sim_cpu *cpu = STATE_CPU (sd, 0); |
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109 | sd->halt_ok = 1; |
110 | setjmp (sd->path_to_restart); | |
111 | sd->restart_ok = 1; | |
abe293a0 | 112 | cia = cpu->cia; |
15c16493 AC |
113 | do |
114 | { | |
115 | if (cia.ip == -1) | |
116 | { | |
117 | /* anulled instruction */ | |
118 | cia.ip = cia.dp; | |
119 | cia.dp = cia.dp + sizeof (instruction_word); | |
120 | } | |
121 | else | |
122 | { | |
123 | instruction_word insn = IMEM (cia.ip); | |
124 | cia = idecode_issue (sd, insn, cia); | |
125 | } | |
126 | } | |
127 | while (*keep_running); | |
abe293a0 | 128 | engine_halt (sd, cpu, cia, sim_stopped, SIGINT); |
15c16493 AC |
129 | } |
130 | } |