1/*  This file is part of the program psim.
2
3    Copyright 1994, 1995, 1996, 1998, 2003 Andrew Cagney
4
5    This program is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation; either version 2 of the License, or
8    (at your option) any later version.
9
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14
15    You should have received a copy of the GNU General Public License
16    along with this program; if not, write to the Free Software
17    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19    */
20
21
22#include <signal.h> /* FIXME - should be machine dependant version */
23#include <stdarg.h>
24#include <ctype.h>
25
26#include "psim.h"
27#include "options.h"
28
29#undef printf_filtered /* blow away the mapping */
30
31#ifdef HAVE_STDLIB_H
32#include <stdlib.h>
33#endif
34
35#ifdef HAVE_STRING_H
36#include <string.h>
37#else
38#ifdef HAVE_STRINGS_H
39#include <strings.h>
40#endif
41#endif
42
43#include "libiberty.h"
44#include "bfd.h"
45#include "gdb/callback.h"
46#include "gdb/remote-sim.h"
47#include "gdb/signals.h"
48
49/* Define the rate at which the simulator should poll the host
50   for a quit. */
51#ifndef POLL_QUIT_INTERVAL
52#define POLL_QUIT_INTERVAL 0x20
53#endif
54
55static int poll_quit_count = POLL_QUIT_INTERVAL;
56
57/* Structures used by the simulator, for gdb just have static structures */
58
59psim *simulator;
60static device *root_device;
61static host_callback *callbacks;
62
63SIM_DESC
64sim_open (SIM_OPEN_KIND kind,
65	  host_callback *callback,
66	  struct bfd *abfd,
67	  char **argv)
68{
69  callbacks = callback;
70
71  /* Note: The simulation is not created by sim_open() because
72     complete information is not yet available */
73  /* trace the call */
74  TRACE(trace_gdb, ("sim_open called\n"));
75
76  if (root_device != NULL)
77    sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
78  root_device = psim_tree();
79  simulator = NULL;
80
81  psim_options(root_device, argv + 1);
82
83  if (ppc_trace[trace_opts])
84    print_options ();
85
86  /* fudge our descriptor for now */
87  return (SIM_DESC) 1;
88}
89
90
91void
92sim_close (SIM_DESC sd, int quitting)
93{
94  TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
95  if (ppc_trace[trace_print_info] && simulator != NULL)
96    psim_print_info (simulator, ppc_trace[trace_print_info]);
97}
98
99
100SIM_RC
101sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
102{
103  TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
104		    prog, from_tty));
105  ASSERT(prog != NULL);
106
107  /* create the simulator */
108  TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
109  simulator = psim_create(prog, root_device);
110
111  /* bring in all the data section */
112  psim_init(simulator);
113
114  /* get the start address */
115  if (abfd == NULL)
116    {
117      abfd = bfd_openr (prog, 0);
118      if (abfd == NULL)
119	error ("psim: can't open \"%s\": %s\n",
120	       prog, bfd_errmsg (bfd_get_error ()));
121      if (!bfd_check_format (abfd, bfd_object))
122	{
123	  const char *errmsg = bfd_errmsg (bfd_get_error ());
124	  bfd_close (abfd);
125	  error ("psim: \"%s\" is not an object file: %s\n",
126		 prog, errmsg);
127	}
128      bfd_close (abfd);
129    }
130
131  return SIM_RC_OK;
132}
133
134
135int
136sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
137{
138  int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
139				buf, mem, length);
140  TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
141		    (long)mem, (long)buf, length, result));
142  return result;
143}
144
145
146int
147sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
148{
149  int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
150				 buf, mem, length,
151				 1/*violate_ro*/);
152  TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
153		    (long)mem, (long)buf, length, result));
154  return result;
155}
156
157void
158sim_info (SIM_DESC sd, int verbose)
159{
160  TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
161  psim_print_info (simulator, verbose);
162}
163
164
165SIM_RC
166sim_create_inferior (SIM_DESC sd,
167		     struct bfd *abfd,
168		     char **argv,
169		     char **envp)
170{
171  unsigned_word entry_point;
172  TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
173		    entry_point));
174
175  if (simulator == NULL)
176    error ("No program loaded");
177
178  if (abfd != NULL)
179    entry_point = bfd_get_start_address (abfd);
180  else
181    entry_point = 0xfff00000; /* ??? */
182
183  psim_init(simulator);
184  psim_stack(simulator, argv, envp);
185
186  ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
187			      &entry_point, "pc", cooked_transfer) > 0);
188  return SIM_RC_OK;
189}
190
191
192void
193sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
194{
195  psim_status status = psim_get_status(simulator);
196
197  switch (status.reason) {
198  case was_continuing:
199    *reason = sim_stopped;
200    if (status.signal == 0)
201      *sigrc = TARGET_SIGNAL_TRAP;
202    else
203      *sigrc = status.signal;
204    break;
205  case was_trap:
206    *reason = sim_stopped;
207    *sigrc = TARGET_SIGNAL_TRAP;
208    break;
209  case was_exited:
210    *reason = sim_exited;
211    *sigrc = status.signal;
212    break;
213  case was_signalled:
214    *reason = sim_signalled;
215    *sigrc = status.signal;
216    break;
217  }
218
219  TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
220		    (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
221}
222
223
224
225/* Run (or resume) the program.  */
226
227int
228sim_stop (SIM_DESC sd)
229{
230  psim_stop (simulator);
231  return 1;
232}
233
234void
235sim_resume (SIM_DESC sd, int step, int siggnal)
236{
237  TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
238		    step, siggnal));
239
240  if (step)
241    {
242      psim_step (simulator);
243    }
244  else
245    {
246      psim_run (simulator);
247    }
248}
249
250void
251sim_do_command (SIM_DESC sd, char *cmd)
252{
253  TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
254		    cmd ? cmd : "(null)"));
255  if (cmd != NULL) {
256    char **argv = buildargv(cmd);
257    psim_command(root_device, argv);
258    freeargv(argv);
259  }
260}
261
262
263/* Polling, if required */
264
265void
266sim_io_poll_quit (void)
267{
268  if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
269    {
270      poll_quit_count = POLL_QUIT_INTERVAL;
271      if (callbacks->poll_quit (callbacks))
272	psim_stop (simulator);
273    }
274}
275
276
277
278/* Map simulator IO operations onto the corresponding GDB I/O
279   functions.
280
281   NB: Only a limited subset of operations are mapped across.  More
282   advanced operations (such as dup or write) must either be mapped to
283   one of the below calls or handled internally */
284
285int
286sim_io_read_stdin(char *buf,
287		  int sizeof_buf)
288{
289  switch (CURRENT_STDIO) {
290  case DO_USE_STDIO:
291    return callbacks->read_stdin(callbacks, buf, sizeof_buf);
292    break;
293  case DONT_USE_STDIO:
294    return callbacks->read(callbacks, 0, buf, sizeof_buf);
295    break;
296  default:
297    error("sim_io_read_stdin: unaccounted switch\n");
298    break;
299  }
300  return 0;
301}
302
303int
304sim_io_write_stdout(const char *buf,
305		    int sizeof_buf)
306{
307  switch (CURRENT_STDIO) {
308  case DO_USE_STDIO:
309    return callbacks->write_stdout(callbacks, buf, sizeof_buf);
310    break;
311  case DONT_USE_STDIO:
312    return callbacks->write(callbacks, 1, buf, sizeof_buf);
313    break;
314  default:
315    error("sim_io_write_stdout: unaccounted switch\n");
316    break;
317  }
318  return 0;
319}
320
321int
322sim_io_write_stderr(const char *buf,
323		    int sizeof_buf)
324{
325  switch (CURRENT_STDIO) {
326  case DO_USE_STDIO:
327    /* NB: I think there should be an explicit write_stderr callback */
328    return callbacks->write(callbacks, 3, buf, sizeof_buf);
329    break;
330  case DONT_USE_STDIO:
331    return callbacks->write(callbacks, 3, buf, sizeof_buf);
332    break;
333  default:
334    error("sim_io_write_stderr: unaccounted switch\n");
335    break;
336  }
337  return 0;
338}
339
340
341void
342sim_io_printf_filtered(const char *fmt,
343		       ...)
344{
345  char message[1024];
346  va_list ap;
347  /* format the message */
348  va_start(ap, fmt);
349  vsprintf(message, fmt, ap);
350  va_end(ap);
351  /* sanity check */
352  if (strlen(message) >= sizeof(message))
353    error("sim_io_printf_filtered: buffer overflow\n");
354  callbacks->printf_filtered(callbacks, "%s", message);
355}
356
357void
358sim_io_flush_stdoutput(void)
359{
360  switch (CURRENT_STDIO) {
361  case DO_USE_STDIO:
362    callbacks->flush_stdout (callbacks);
363    break;
364  case DONT_USE_STDIO:
365    break;
366  default:
367    error("sim_io_read_stdin: unaccounted switch\n");
368    break;
369  }
370}
371
372void
373sim_io_error (SIM_DESC sd, const char *fmt, ...)
374{
375  va_list ap;
376  va_start(ap, fmt);
377  callbacks->evprintf_filtered (callbacks, fmt, ap);
378  va_end(ap);
379  callbacks->error (callbacks, "");
380}
381
382/****/
383
384void *
385zalloc(long size)
386{
387  void *memory = (void*)xmalloc(size);
388  if (memory == NULL)
389    error("xmalloc failed\n");
390  memset(memory, 0, size);
391  return memory;
392}
393
394void zfree(void *data)
395{
396  free(data);
397}
398