1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
/* gdb->simulator interface.
Copyright (C) 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
This file is part of Z8KSIM
Z8KSIM is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
Z8KSIM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Z8KZIM; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "ansidecl.h"
#include "sim.h"
#include "tm.h"
#include "signal.h"
#include "bfd.h"
#include "callback.h"
#include "remote-sim.h"
#ifndef NULL
#define NULL 0
#endif
host_callback *z8k_callback;
static SIM_OPEN_KIND sim_kind;
static char *myname;
void
sim_size (n)
int n;
{
/* Size is fixed. */
}
int
sim_store_register (sd, regno, value, length)
SIM_DESC sd;
int regno;
unsigned char *value;
int length;
{
/* FIXME: Review the computation of regval. */
int regval = (value[0] << 24) | (value[1] << 16) | (value[2] << 8) | value[3];
tm_store_register (regno, regval);
return -1;
}
int
sim_fetch_register (sd, regno, buf, length)
SIM_DESC sd;
int regno;
unsigned char *buf;
int length;
{
tm_fetch_register (regno, buf);
return -1;
}
int
sim_write (sd, where, what, howmuch)
SIM_DESC sd;
SIM_ADDR where;
unsigned char *what;
int howmuch;
{
int i;
for (i = 0; i < howmuch; i++)
tm_write_byte (where + i, what[i]);
return howmuch;
}
int
sim_read (sd, where, what, howmuch)
SIM_DESC sd;
SIM_ADDR where;
unsigned char *what;
int howmuch;
{
int i;
for (i = 0; i < howmuch; i++)
what[i] = tm_read_byte (where + i);
return howmuch;
}
static void
control_c (sig, code, scp, addr)
int sig;
int code;
char *scp;
char *addr;
{
tm_exception (SIM_INTERRUPT);
}
int
sim_stop (sd)
SIM_DESC sd;
{
tm_exception (SIM_INTERRUPT);
return 1;
}
void
sim_resume (sd, step, sig)
SIM_DESC sd;
int step;
int sig;
{
void (*prev) ();
prev = signal (SIGINT, control_c);
tm_resume (step);
signal (SIGINT, prev);
}
void
sim_stop_reason (sd, reason, sigrc)
SIM_DESC sd;
enum sim_stop *reason;
int *sigrc;
{
switch (tm_signal ())
{
case SIM_DIV_ZERO:
*sigrc = SIGFPE;
break;
case SIM_INTERRUPT:
*sigrc = SIGINT;
break;
case SIM_BAD_INST:
*sigrc = SIGILL;
break;
case SIM_BREAKPOINT:
*sigrc = SIGTRAP;
break;
case SIM_SINGLE_STEP:
*sigrc = SIGTRAP;
break;
case SIM_BAD_SYSCALL:
*sigrc = SIGILL;
break;
case SIM_BAD_ALIGN:
*sigrc = SIGSEGV;
break;
case SIM_DONE:
{
sim_state_type x;
tm_state (&x);
*sigrc = x.regs[2].word & 255;
*reason = sim_exited;
return;
}
default:
abort ();
}
*reason = sim_stopped;
}
void
sim_info (sd, verbose)
SIM_DESC sd;
int verbose;
{
sim_state_type x;
tm_state (&x);
tm_info_print (&x);
}
SIM_DESC
sim_open (kind, cb, abfd, argv)
SIM_OPEN_KIND kind;
host_callback *cb;
struct _bfd *abfd;
char **argv;
{
/* FIXME: The code in sim_load that determines the exact z8k arch
should be moved to here */
sim_kind = kind;
myname = argv[0];
z8k_callback = cb;
/* fudge our descriptor for now */
return (SIM_DESC) 1;
}
void
sim_close (sd, quitting)
SIM_DESC sd;
int quitting;
{
/* nothing to do */
}
SIM_RC
sim_load (sd, prog, abfd, from_tty)
SIM_DESC sd;
char *prog;
bfd *abfd;
int from_tty;
{
extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
bfd *prog_bfd;
/* FIXME: The code determining the type of z9k processor should be
moved from here to sim_open. */
prog_bfd = sim_load_file (sd, myname, z8k_callback, prog, abfd,
sim_kind == SIM_OPEN_DEBUG,
0, sim_write);
if (prog_bfd == NULL)
return SIM_RC_FAIL;
if (bfd_get_mach (prog_bfd) == bfd_mach_z8001)
{
extern int sim_z8001_mode;
sim_z8001_mode = 1;
}
/* Close the bfd if we opened it. */
if (abfd == NULL)
bfd_close (prog_bfd);
return SIM_RC_OK;
}
SIM_RC
sim_create_inferior (sd, abfd, argv, env)
SIM_DESC sd;
struct _bfd *abfd;
char **argv;
char **env;
{
if (abfd != NULL)
tm_store_register (REG_PC, bfd_get_start_address (abfd));
else
tm_store_register (REG_PC, 0);
return SIM_RC_OK;
}
void
sim_do_command (sd, cmd)
SIM_DESC sd;
char *cmd;
{
}
void
sim_set_callbacks (ptr)
host_callback *ptr;
{
z8k_callback = ptr;
}
|
