sim/ppc/sim_calls.c

   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 3 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, see <http://www.gnu.org/licenses/>.
  17
  18     */
  19
  20
  21 #include <signal.h> /* FIXME - should be machine dependant version */
  22 #include <stdarg.h>
  23 #include <ctype.h>
  24
  25 #include "psim.h"
  26 #include "options.h"
  27
  28 #undef printf_filtered /* blow away the mapping */
  29
  30 #ifdef HAVE_STDLIB_H
  31 #include <stdlib.h>
  32 #endif
  33
  34 #ifdef HAVE_STRING_H
  35 #include <string.h>
  36 #else
  37 #ifdef HAVE_STRINGS_H
  38 #include <strings.h>
  39 #endif
  40 #endif
  41
  42 #include "libiberty.h"
  43 #include "bfd.h"
  44 #include "gdb/callback.h"
  45 #include "gdb/remote-sim.h"
  46 #include "gdb/signals.h"
  47
  48 /* Define the rate at which the simulator should poll the host
  49    for a quit. */
  50 #ifndef POLL_QUIT_INTERVAL
  51 #define POLL_QUIT_INTERVAL 0x20
  52 #endif
  53
  54 static int poll_quit_count = POLL_QUIT_INTERVAL;
  55
  56 /* Structures used by the simulator, for gdb just have static structures */
  57
  58 psim *simulator;
  59 static device *root_device;
  60 static host_callback *callbacks;
  61
  62 SIM_DESC
  63 sim_open (SIM_OPEN_KIND kind,
  64           host_callback *callback,
  65           struct bfd *abfd,
  66           char * const *argv)
  67 {
  68   callbacks = callback;
  69
  70   /* Note: The simulation is not created by sim_open() because
  71      complete information is not yet available */
  72   /* trace the call */
  73   TRACE(trace_gdb, ("sim_open called\n"));
  74
  75   if (root_device != NULL)
  76     sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
  77   root_device = psim_tree();
  78   simulator = NULL;
  79
  80   if (psim_options (root_device, argv + 1, kind) == NULL)
  81     return NULL;
  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
  91 void
  92 sim_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
 100 SIM_RC
 101 sim_load (SIM_DESC sd, const 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
 135 int
 136 sim_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
 146 int
 147 sim_write (SIM_DESC sd, SIM_ADDR mem, const 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
 157 void
 158 sim_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
 165 SIM_RC
 166 sim_create_inferior (SIM_DESC sd,
 167                      struct bfd *abfd,
 168                      char * const *argv,
 169                      char * const *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
 192 void
 193 sim_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 = GDB_SIGNAL_TRAP;
 202     else
 203       *sigrc = status.signal;
 204     break;
 205   case was_trap:
 206     *reason = sim_stopped;
 207     *sigrc = GDB_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
 227 int
 228 sim_stop (SIM_DESC sd)
 229 {
 230   psim_stop (simulator);
 231   return 1;
 232 }
 233
 234 void
 235 sim_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
 250 void
 251 sim_do_command (SIM_DESC sd, const 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 char **
 263 sim_complete_command (SIM_DESC sd, const char *text, const char *word)
 264 {
 265   return NULL;
 266 }
 267
 268 /* Polling, if required */
 269
 270 void
 271 sim_io_poll_quit (void)
 272 {
 273   if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
 274     {
 275       poll_quit_count = POLL_QUIT_INTERVAL;
 276       if (callbacks->poll_quit (callbacks))
 277         psim_stop (simulator);
 278     }
 279 }
 280
 281
 282
 283 /* Map simulator IO operations onto the corresponding GDB I/O
 284    functions.
 285
 286    NB: Only a limited subset of operations are mapped across.  More
 287    advanced operations (such as dup or write) must either be mapped to
 288    one of the below calls or handled internally */
 289
 290 int
 291 sim_io_read_stdin(char *buf,
 292                   int sizeof_buf)
 293 {
 294   switch (CURRENT_STDIO) {
 295   case DO_USE_STDIO:
 296     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 297     break;
 298   case DONT_USE_STDIO:
 299     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 300     break;
 301   default:
 302     error("sim_io_read_stdin: unaccounted switch\n");
 303     break;
 304   }
 305   return 0;
 306 }
 307
 308 int
 309 sim_io_write_stdout(const char *buf,
 310                     int sizeof_buf)
 311 {
 312   switch (CURRENT_STDIO) {
 313   case DO_USE_STDIO:
 314     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 315     break;
 316   case DONT_USE_STDIO:
 317     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 318     break;
 319   default:
 320     error("sim_io_write_stdout: unaccounted switch\n");
 321     break;
 322   }
 323   return 0;
 324 }
 325
 326 int
 327 sim_io_write_stderr(const char *buf,
 328                     int sizeof_buf)
 329 {
 330   switch (CURRENT_STDIO) {
 331   case DO_USE_STDIO:
 332     /* NB: I think there should be an explicit write_stderr callback */
 333     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 334     break;
 335   case DONT_USE_STDIO:
 336     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 337     break;
 338   default:
 339     error("sim_io_write_stderr: unaccounted switch\n");
 340     break;
 341   }
 342   return 0;
 343 }
 344
 345
 346 void
 347 sim_io_printf_filtered(const char *fmt,
 348                        ...)
 349 {
 350   char message[1024];
 351   va_list ap;
 352   /* format the message */
 353   va_start(ap, fmt);
 354   vsprintf(message, fmt, ap);
 355   va_end(ap);
 356   /* sanity check */
 357   if (strlen(message) >= sizeof(message))
 358     error("sim_io_printf_filtered: buffer overflow\n");
 359   callbacks->printf_filtered(callbacks, "%s", message);
 360 }
 361
 362 void
 363 sim_io_flush_stdoutput(void)
 364 {
 365   switch (CURRENT_STDIO) {
 366   case DO_USE_STDIO:
 367     callbacks->flush_stdout (callbacks);
 368     break;
 369   case DONT_USE_STDIO:
 370     break;
 371   default:
 372     error("sim_io_read_stdin: unaccounted switch\n");
 373     break;
 374   }
 375 }
 376
 377 void
 378 sim_io_error (SIM_DESC sd, const char *fmt, ...)
 379 {
 380   va_list ap;
 381   va_start(ap, fmt);
 382   callbacks->evprintf_filtered (callbacks, fmt, ap);
 383   va_end(ap);
 384   callbacks->error (callbacks, "");
 385 }
 386
 387 /****/
 388
 389 void NORETURN
 390 error (const char *msg, ...)
 391 {
 392   va_list ap;
 393   va_start(ap, msg);
 394   callbacks->evprintf_filtered (callbacks, msg, ap);
 395   va_end(ap);
 396   callbacks->error (callbacks, "");
 397 }
 398
 399 void *
 400 zalloc(long size)
 401 {
 402   void *memory = (void*)xmalloc(size);
 403   if (memory == NULL)
 404     error("xmalloc failed\n");
 405   memset(memory, 0, size);
 406   return memory;
 407 }