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 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include "ansidecl.h"
  34 #include "libiberty.h"
  35 #include "bfd.h"
  36 #include "sim/callback.h"
  37 #include "sim/sim.h"
  38 #include "gdb/signals.h"
  39
  40 /* Define the rate at which the simulator should poll the host
  41    for a quit. */
  42 #ifndef POLL_QUIT_INTERVAL
  43 #define POLL_QUIT_INTERVAL 0x20
  44 #endif
  45
  46 static int poll_quit_count = POLL_QUIT_INTERVAL;
  47
  48 /* Structures used by the simulator, for gdb just have static structures */
  49
  50 psim *simulator;
  51 static device *root_device;
  52 static host_callback *callbacks;
  53
  54 SIM_DESC
  55 sim_open (SIM_OPEN_KIND kind,
  56           host_callback *callback,
  57           struct bfd *abfd,
  58           char * const *argv)
  59 {
  60   callbacks = callback;
  61
  62   /* Note: The simulation is not created by sim_open() because
  63      complete information is not yet available */
  64   /* trace the call */
  65   TRACE(trace_gdb, ("sim_open called\n"));
  66
  67   if (root_device != NULL)
  68     sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
  69   root_device = psim_tree();
  70   simulator = NULL;
  71
  72   if (psim_options (root_device, argv + 1, kind) == NULL)
  73     return NULL;
  74
  75   if (ppc_trace[trace_opts])
  76     print_options ();
  77
  78   /* fudge our descriptor for now */
  79   return (SIM_DESC) 1;
  80 }
  81
  82
  83 void
  84 sim_close (SIM_DESC sd, int quitting)
  85 {
  86   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  87   if (ppc_trace[trace_print_info] && simulator != NULL)
  88     psim_print_info (simulator, ppc_trace[trace_print_info]);
  89 }
  90
  91
  92 SIM_RC
  93 sim_load (SIM_DESC sd, const char *prog, bfd *abfd, int from_tty)
  94 {
  95   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
  96                     prog, from_tty));
  97   ASSERT(prog != NULL);
  98
  99   /* create the simulator */
 100   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 101   simulator = psim_create(prog, root_device);
 102
 103   /* bring in all the data section */
 104   psim_init(simulator);
 105
 106   /* get the start address */
 107   if (abfd == NULL)
 108     {
 109       abfd = bfd_openr (prog, 0);
 110       if (abfd == NULL)
 111         error ("psim: can't open \"%s\": %s\n",
 112                prog, bfd_errmsg (bfd_get_error ()));
 113       if (!bfd_check_format (abfd, bfd_object))
 114         {
 115           const char *errmsg = bfd_errmsg (bfd_get_error ());
 116           bfd_close (abfd);
 117           error ("psim: \"%s\" is not an object file: %s\n",
 118                  prog, errmsg);
 119         }
 120       bfd_close (abfd);
 121     }
 122
 123   return SIM_RC_OK;
 124 }
 125
 126
 127 int
 128 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 129 {
 130   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 131                                 buf, mem, length);
 132   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=%p, length=%d) = %d\n",
 133                     (long)mem, buf, length, result));
 134   return result;
 135 }
 136
 137
 138 int
 139 sim_write (SIM_DESC sd, SIM_ADDR mem, const unsigned char *buf, int length)
 140 {
 141   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 142                                  buf, mem, length,
 143                                  1/*violate_ro*/);
 144   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=%p, length=%d) = %d\n",
 145                     (long)mem, buf, length, result));
 146   return result;
 147 }
 148
 149 void
 150 sim_info (SIM_DESC sd, int verbose)
 151 {
 152   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 153   psim_print_info (simulator, verbose);
 154 }
 155
 156
 157 SIM_RC
 158 sim_create_inferior (SIM_DESC sd,
 159                      struct bfd *abfd,
 160                      char * const *argv,
 161                      char * const *envp)
 162 {
 163   unsigned_word entry_point;
 164
 165   if (simulator == NULL)
 166     error ("No program loaded");
 167
 168   if (abfd != NULL)
 169     entry_point = bfd_get_start_address (abfd);
 170   else
 171     entry_point = 0xfff00000; /* ??? */
 172
 173   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 174                     entry_point));
 175
 176   psim_init(simulator);
 177   psim_stack(simulator, argv, envp);
 178
 179   ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
 180                               &entry_point, "pc", cooked_transfer) > 0);
 181   return SIM_RC_OK;
 182 }
 183
 184
 185 void
 186 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 187 {
 188   psim_status status = psim_get_status(simulator);
 189
 190   switch (status.reason) {
 191   case was_continuing:
 192     *reason = sim_stopped;
 193     if (status.signal == 0)
 194       *sigrc = GDB_SIGNAL_TRAP;
 195     else
 196       *sigrc = status.signal;
 197     break;
 198   case was_trap:
 199     *reason = sim_stopped;
 200     *sigrc = GDB_SIGNAL_TRAP;
 201     break;
 202   case was_exited:
 203     *reason = sim_exited;
 204     *sigrc = status.signal;
 205     break;
 206   case was_signalled:
 207     *reason = sim_signalled;
 208     *sigrc = status.signal;
 209     break;
 210   }
 211
 212   TRACE(trace_gdb, ("sim_stop_reason(reason=%p(%ld), sigrc=%p(%ld))\n",
 213                     reason, (long)*reason, sigrc, (long)*sigrc));
 214 }
 215
 216
 217
 218 /* Run (or resume) the program.  */
 219
 220 int
 221 sim_stop (SIM_DESC sd)
 222 {
 223   psim_stop (simulator);
 224   return 1;
 225 }
 226
 227 void
 228 sim_resume (SIM_DESC sd, int step, int siggnal)
 229 {
 230   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 231                     step, siggnal));
 232
 233   if (step)
 234     {
 235       psim_step (simulator);
 236     }
 237   else
 238     {
 239       psim_run (simulator);
 240     }
 241 }
 242
 243 void
 244 sim_do_command (SIM_DESC sd, const char *cmd)
 245 {
 246   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 247                     cmd ? cmd : "(null)"));
 248   if (cmd != NULL) {
 249     char **argv = buildargv(cmd);
 250     psim_command(root_device, argv);
 251     freeargv(argv);
 252   }
 253 }
 254
 255 char **
 256 sim_complete_command (SIM_DESC sd, const char *text, const char *word)
 257 {
 258   return NULL;
 259 }
 260
 261 char *
 262 sim_memory_map (SIM_DESC sd)
 263 {
 264   return NULL;
 265 }
 266
 267 /* Polling, if required */
 268
 269 void
 270 sim_io_poll_quit (void)
 271 {
 272   if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
 273     {
 274       poll_quit_count = POLL_QUIT_INTERVAL;
 275       if (callbacks->poll_quit (callbacks))
 276         psim_stop (simulator);
 277     }
 278 }
 279
 280
 281
 282 /* Map simulator IO operations onto the corresponding GDB I/O
 283    functions.
 284
 285    NB: Only a limited subset of operations are mapped across.  More
 286    advanced operations (such as dup or write) must either be mapped to
 287    one of the below calls or handled internally */
 288
 289 int
 290 sim_io_read_stdin(char *buf,
 291                   int sizeof_buf)
 292 {
 293   switch (CURRENT_STDIO) {
 294   case DO_USE_STDIO:
 295     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 296     break;
 297   case DONT_USE_STDIO:
 298     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 299     break;
 300   default:
 301     error("sim_io_read_stdin: unaccounted switch\n");
 302     break;
 303   }
 304   return 0;
 305 }
 306
 307 int
 308 sim_io_write_stdout(const char *buf,
 309                     int sizeof_buf)
 310 {
 311   switch (CURRENT_STDIO) {
 312   case DO_USE_STDIO:
 313     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 314     break;
 315   case DONT_USE_STDIO:
 316     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 317     break;
 318   default:
 319     error("sim_io_write_stdout: unaccounted switch\n");
 320     break;
 321   }
 322   return 0;
 323 }
 324
 325 int
 326 sim_io_write_stderr(const char *buf,
 327                     int sizeof_buf)
 328 {
 329   switch (CURRENT_STDIO) {
 330   case DO_USE_STDIO:
 331     /* NB: I think there should be an explicit write_stderr callback */
 332     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 333     break;
 334   case DONT_USE_STDIO:
 335     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 336     break;
 337   default:
 338     error("sim_io_write_stderr: unaccounted switch\n");
 339     break;
 340   }
 341   return 0;
 342 }
 343
 344
 345 void
 346 sim_io_printf_filtered(const char *fmt,
 347                        ...)
 348 {
 349   char message[1024];
 350   va_list ap;
 351   /* format the message */
 352   va_start(ap, fmt);
 353   vsprintf(message, fmt, ap);
 354   va_end(ap);
 355   /* sanity check */
 356   if (strlen(message) >= sizeof(message))
 357     error("sim_io_printf_filtered: buffer overflow\n");
 358   callbacks->printf_filtered(callbacks, "%s", message);
 359 }
 360
 361 void
 362 sim_io_flush_stdoutput(void)
 363 {
 364   switch (CURRENT_STDIO) {
 365   case DO_USE_STDIO:
 366     callbacks->flush_stdout (callbacks);
 367     break;
 368   case DONT_USE_STDIO:
 369     break;
 370   default:
 371     error("sim_io_read_stdin: unaccounted switch\n");
 372     break;
 373   }
 374 }
 375
 376 /* Glue to use sim-fpu module.  */
 377
 378 void
 379 sim_io_error (SIM_DESC sd, const char *fmt, ...)
 380 {
 381   va_list ap;
 382   va_start(ap, fmt);
 383   callbacks->evprintf_filtered (callbacks, fmt, ap);
 384   va_end(ap);
 385   /* Printing a space here avoids empty printf compiler warnings.  Not ideal,
 386      but we want error's side-effect where it halts processing.  */
 387   callbacks->error (callbacks, " ");
 388 }
 389
 390 /****/
 391
 392 void
 393 error (const char *msg, ...)
 394 {
 395   va_list ap;
 396   va_start(ap, msg);
 397   callbacks->evprintf_filtered (callbacks, msg, ap);
 398   va_end(ap);
 399   /* Printing a space here avoids empty printf compiler warnings.  Not ideal,
 400      but we want error's side-effect where it halts processing.  */
 401   callbacks->error (callbacks, " ");
 402 }
 403
 404 void *
 405 zalloc(long size)
 406 {
 407   void *memory = (void*)xmalloc(size);
 408   if (memory == NULL)
 409     error("xmalloc failed\n");
 410   memset(memory, 0, size);
 411   return memory;
 412 }