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 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
  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 **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   psim_options(root_device, argv + 1);
  81
  82   if (ppc_trace[trace_opts])
  83     print_options ();
  84
  85   /* fudge our descriptor for now */
  86   return (SIM_DESC) 1;
  87 }
  88
  89
  90 void
  91 sim_close (SIM_DESC sd, int quitting)
  92 {
  93   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  94   if (ppc_trace[trace_print_info] && simulator != NULL)
  95     psim_print_info (simulator, ppc_trace[trace_print_info]);
  96 }
  97
  98
  99 SIM_RC
 100 sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
 101 {
 102   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
 103                     prog, from_tty));
 104   ASSERT(prog != NULL);
 105
 106   /* create the simulator */
 107   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 108   simulator = psim_create(prog, root_device);
 109
 110   /* bring in all the data section */
 111   psim_init(simulator);
 112
 113   /* get the start address */
 114   if (abfd == NULL)
 115     {
 116       abfd = bfd_openr (prog, 0);
 117       if (abfd == NULL)
 118         error ("psim: can't open \"%s\": %s\n",
 119                prog, bfd_errmsg (bfd_get_error ()));
 120       if (!bfd_check_format (abfd, bfd_object))
 121         {
 122           const char *errmsg = bfd_errmsg (bfd_get_error ());
 123           bfd_close (abfd);
 124           error ("psim: \"%s\" is not an object file: %s\n",
 125                  prog, errmsg);
 126         }
 127       bfd_close (abfd);
 128     }
 129
 130   return SIM_RC_OK;
 131 }
 132
 133
 134 int
 135 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 136 {
 137   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 138                                 buf, mem, length);
 139   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 140                     (long)mem, (long)buf, length, result));
 141   return result;
 142 }
 143
 144
 145 int
 146 sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 147 {
 148   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 149                                  buf, mem, length,
 150                                  1/*violate_ro*/);
 151   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 152                     (long)mem, (long)buf, length, result));
 153   return result;
 154 }
 155
 156 void
 157 sim_info (SIM_DESC sd, int verbose)
 158 {
 159   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 160   psim_print_info (simulator, verbose);
 161 }
 162
 163
 164 SIM_RC
 165 sim_create_inferior (SIM_DESC sd,
 166                      struct bfd *abfd,
 167                      char **argv,
 168                      char **envp)
 169 {
 170   unsigned_word entry_point;
 171   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 172                     entry_point));
 173
 174   if (simulator == NULL)
 175     error ("No program loaded");
 176
 177   if (abfd != NULL)
 178     entry_point = bfd_get_start_address (abfd);
 179   else
 180     entry_point = 0xfff00000; /* ??? */
 181
 182   psim_init(simulator);
 183   psim_stack(simulator, argv, envp);
 184
 185   ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
 186                               &entry_point, "pc", cooked_transfer) > 0);
 187   return SIM_RC_OK;
 188 }
 189
 190
 191 void
 192 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 193 {
 194   psim_status status = psim_get_status(simulator);
 195
 196   switch (status.reason) {
 197   case was_continuing:
 198     *reason = sim_stopped;
 199     if (status.signal == 0)
 200       *sigrc = SIGTRAP;
 201     else
 202       *sigrc = status.signal;
 203     break;
 204   case was_trap:
 205     *reason = sim_stopped;
 206     *sigrc = SIGTRAP;
 207     break;
 208   case was_exited:
 209     *reason = sim_exited;
 210     *sigrc = status.signal;
 211     break;
 212   case was_signalled:
 213     *reason = sim_signalled;
 214     *sigrc = status.signal;
 215     break;
 216   }
 217
 218   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 219                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 220 }
 221
 222
 223
 224 /* Run (or resume) the program.  */
 225
 226 int
 227 sim_stop (SIM_DESC sd)
 228 {
 229   psim_stop (simulator);
 230   return 1;
 231 }
 232
 233 void
 234 sim_resume (SIM_DESC sd, int step, int siggnal)
 235 {
 236   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 237                     step, siggnal));
 238
 239   if (step)
 240     {
 241       psim_step (simulator);
 242     }
 243   else
 244     {
 245       psim_run (simulator);
 246     }
 247 }
 248
 249 void
 250 sim_do_command (SIM_DESC sd, char *cmd)
 251 {
 252   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 253                     cmd ? cmd : "(null)"));
 254   if (cmd != NULL) {
 255     char **argv = buildargv(cmd);
 256     psim_command(root_device, argv);
 257     freeargv(argv);
 258   }
 259 }
 260
 261
 262 /* Polling, if required */
 263
 264 void
 265 sim_io_poll_quit (void)
 266 {
 267   if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
 268     {
 269       poll_quit_count = POLL_QUIT_INTERVAL;
 270       if (callbacks->poll_quit (callbacks))
 271         psim_stop (simulator);
 272     }
 273 }
 274
 275
 276
 277 /* Map simulator IO operations onto the corresponding GDB I/O
 278    functions.
 279
 280    NB: Only a limited subset of operations are mapped across.  More
 281    advanced operations (such as dup or write) must either be mapped to
 282    one of the below calls or handled internally */
 283
 284 int
 285 sim_io_read_stdin(char *buf,
 286                   int sizeof_buf)
 287 {
 288   switch (CURRENT_STDIO) {
 289   case DO_USE_STDIO:
 290     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 291     break;
 292   case DONT_USE_STDIO:
 293     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 294     break;
 295   default:
 296     error("sim_io_read_stdin: unaccounted switch\n");
 297     break;
 298   }
 299   return 0;
 300 }
 301
 302 int
 303 sim_io_write_stdout(const char *buf,
 304                     int sizeof_buf)
 305 {
 306   switch (CURRENT_STDIO) {
 307   case DO_USE_STDIO:
 308     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 309     break;
 310   case DONT_USE_STDIO:
 311     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 312     break;
 313   default:
 314     error("sim_io_write_stdout: unaccounted switch\n");
 315     break;
 316   }
 317   return 0;
 318 }
 319
 320 int
 321 sim_io_write_stderr(const char *buf,
 322                     int sizeof_buf)
 323 {
 324   switch (CURRENT_STDIO) {
 325   case DO_USE_STDIO:
 326     /* NB: I think there should be an explicit write_stderr callback */
 327     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 328     break;
 329   case DONT_USE_STDIO:
 330     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 331     break;
 332   default:
 333     error("sim_io_write_stderr: unaccounted switch\n");
 334     break;
 335   }
 336   return 0;
 337 }
 338
 339
 340 void
 341 sim_io_printf_filtered(const char *fmt,
 342                        ...)
 343 {
 344   char message[1024];
 345   va_list ap;
 346   /* format the message */
 347   va_start(ap, fmt);
 348   vsprintf(message, fmt, ap);
 349   va_end(ap);
 350   /* sanity check */
 351   if (strlen(message) >= sizeof(message))
 352     error("sim_io_printf_filtered: buffer overflow\n");
 353   callbacks->printf_filtered(callbacks, "%s", message);
 354 }
 355
 356 void
 357 sim_io_flush_stdoutput(void)
 358 {
 359   switch (CURRENT_STDIO) {
 360   case DO_USE_STDIO:
 361     callbacks->flush_stdout (callbacks);
 362     break;
 363   case DONT_USE_STDIO:
 364     break;
 365   default:
 366     error("sim_io_read_stdin: unaccounted switch\n");
 367     break;
 368   }
 369 }
 370
 371 void
 372 sim_io_error (SIM_DESC sd, const char *fmt, ...)
 373 {
 374   va_list ap;
 375   va_start(ap, fmt);
 376   callbacks->evprintf_filtered (callbacks, fmt, ap);
 377   va_end(ap);
 378   callbacks->error (callbacks, "");
 379 }
 380
 381 /****/
 382
 383 void *
 384 zalloc(long size)
 385 {
 386   void *memory = (void*)xmalloc(size);
 387   if (memory == NULL)
 388     error("xmalloc failed\n");
 389   memset(memory, 0, size);
 390   return memory;
 391 }
 392
 393 void zfree(void *data)
 394 {
 395   free(data);
 396 }