sim/ppc/sim_calls.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
   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 "defs.h"
  44 #include "bfd.h"
  45 #include "callback.h"
  46 #include "remote-sim.h"
  47
  48
  49 /* Structures used by the simulator, for gdb just have static structures */
  50
  51 static psim *simulator;
  52 static device *root_device;
  53 static const char *register_names[] = REGISTER_NAMES;
  54 static host_callback *callbacks;
  55
  56 SIM_DESC
  57 sim_open (SIM_OPEN_KIND kind,
  58           host_callback *callback,
  59           struct _bfd *abfd,
  60           char **argv)
  61 {
  62   callbacks = callback;
  63
  64   /* Note: The simulation is not created by sim_open() because
  65      complete information is not yet available */
  66   /* trace the call */
  67   TRACE(trace_gdb, ("sim_open called\n"));
  68
  69   if (root_device != NULL)
  70     sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
  71   root_device = psim_tree();
  72   simulator = NULL;
  73
  74   psim_options(root_device, argv + 1);
  75
  76   if (ppc_trace[trace_opts])
  77     print_options ();
  78
  79   /* fudge our descriptor for now */
  80   return (SIM_DESC) 1;
  81 }
  82
  83
  84 void
  85 sim_close (SIM_DESC sd, int quitting)
  86 {
  87   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  88   if (ppc_trace[trace_print_info] && simulator != NULL)
  89     psim_print_info (simulator, ppc_trace[trace_print_info]);
  90 }
  91
  92
  93 SIM_RC
  94 sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
  95 {
  96   char **argv;
  97   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
  98                     prog, from_tty));
  99   ASSERT(prog != NULL);
 100
 101   /* parse the arguments, assume that the file is argument 0 */
 102   argv = buildargv(prog);
 103   ASSERT(argv != NULL && argv[0] != NULL);
 104
 105   /* create the simulator */
 106   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 107   simulator = psim_create(argv[0], root_device);
 108
 109   /* bring in all the data section */
 110   psim_init(simulator);
 111
 112   /* get the start address */
 113   if (abfd == NULL)
 114     {
 115       abfd = bfd_openr (argv[0], 0);
 116       if (abfd == NULL)
 117         error ("psim: can't open \"%s\": %s\n",
 118                argv[0], bfd_errmsg (bfd_get_error ()));
 119       if (!bfd_check_format (abfd, bfd_object))
 120         {
 121           const char *errmsg = bfd_errmsg (bfd_get_error ());
 122           bfd_close (abfd);
 123           error ("psim: \"%s\" is not an object file: %s\n",
 124                  argv[0], errmsg);
 125         }
 126       bfd_close (abfd);
 127     }
 128
 129   /* release the arguments */
 130   freeargv(argv);
 131
 132   return SIM_RC_OK;
 133 }
 134
 135
 136 int
 137 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 138 {
 139   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 140                                 buf, mem, length);
 141   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 142                     (long)mem, (long)buf, length, result));
 143   return result;
 144 }
 145
 146
 147 int
 148 sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 149 {
 150   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 151                                  buf, mem, length,
 152                                  1/*violate_ro*/);
 153   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 154                     (long)mem, (long)buf, length, result));
 155   return result;
 156 }
 157
 158
 159 void
 160 sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf)
 161 {
 162   if (simulator == NULL) {
 163     return;
 164   }
 165   TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
 166                     regno, register_names[regno], (long)buf));
 167   psim_read_register(simulator, MAX_NR_PROCESSORS,
 168                      buf, register_names[regno],
 169                      raw_transfer);
 170 }
 171
 172
 173 void
 174 sim_store_register (SIM_DESC sd, int regno, unsigned char *buf)
 175 {
 176   if (simulator == NULL)
 177     return;
 178   TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
 179                     regno, register_names[regno], (long)buf));
 180   psim_write_register(simulator, MAX_NR_PROCESSORS,
 181                       buf, register_names[regno],
 182                       raw_transfer);
 183 }
 184
 185
 186 void
 187 sim_info (SIM_DESC sd, int verbose)
 188 {
 189   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 190   psim_print_info (simulator, verbose);
 191 }
 192
 193
 194 SIM_RC
 195 sim_create_inferior (SIM_DESC sd,
 196                      struct _bfd *abfd,
 197                      char **argv,
 198                      char **envp)
 199 {
 200   unsigned_word entry_point;
 201   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 202                     entry_point));
 203
 204   if (simulator == NULL)
 205     error ("No program loaded");
 206
 207   if (abfd != NULL)
 208     entry_point = bfd_get_start_address (abfd);
 209   else
 210     entry_point = 0xfff00000; /* ??? */
 211
 212   psim_init(simulator);
 213   psim_stack(simulator, argv, envp);
 214
 215   psim_write_register(simulator, -1 /* all start at same PC */,
 216                       &entry_point, "pc", cooked_transfer);
 217   return SIM_RC_OK;
 218 }
 219
 220
 221 void
 222 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 223 {
 224   psim_status status = psim_get_status(simulator);
 225
 226   switch (status.reason) {
 227   case was_continuing:
 228     *reason = sim_stopped;
 229     if (status.signal == 0)
 230       *sigrc = SIGTRAP;
 231     else
 232       *sigrc = status.signal;
 233     break;
 234   case was_trap:
 235     *reason = sim_stopped;
 236     *sigrc = SIGTRAP;
 237     break;
 238   case was_exited:
 239     *reason = sim_exited;
 240     *sigrc = status.signal;
 241     break;
 242   case was_signalled:
 243     *reason = sim_signalled;
 244     *sigrc = status.signal;
 245     break;
 246   }
 247
 248   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 249                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 250 }
 251
 252
 253
 254 /* Run (or resume) the program.  */
 255
 256 int
 257 sim_stop (SIM_DESC sd)
 258 {
 259   psim_stop (simulator);
 260   return 1;
 261 }
 262
 263 void
 264 sim_resume (SIM_DESC sd, int step, int siggnal)
 265 {
 266   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 267                     step, siggnal));
 268
 269   if (step)
 270     {
 271       psim_step (simulator);
 272     }
 273   else
 274     {
 275       psim_run (simulator);
 276     }
 277 }
 278
 279 void
 280 sim_do_command (SIM_DESC sd, char *cmd)
 281 {
 282   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 283                     cmd ? cmd : "(null)"));
 284   if (cmd != NULL) {
 285     char **argv = buildargv(cmd);
 286     psim_command(root_device, argv);
 287     freeargv(argv);
 288   }
 289 }
 290
 291
 292 /* Map simulator IO operations onto the corresponding GDB I/O
 293    functions.
 294
 295    NB: Only a limited subset of operations are mapped across.  More
 296    advanced operations (such as dup or write) must either be mapped to
 297    one of the below calls or handled internally */
 298
 299 int
 300 sim_io_read_stdin(char *buf,
 301                   int sizeof_buf)
 302 {
 303   switch (CURRENT_STDIO) {
 304   case DO_USE_STDIO:
 305     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 306     break;
 307   case DONT_USE_STDIO:
 308     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 309     break;
 310   default:
 311     error("sim_io_read_stdin: unaccounted switch\n");
 312     break;
 313   }
 314   return 0;
 315 }
 316
 317 int
 318 sim_io_write_stdout(const char *buf,
 319                     int sizeof_buf)
 320 {
 321   switch (CURRENT_STDIO) {
 322   case DO_USE_STDIO:
 323     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 324     break;
 325   case DONT_USE_STDIO:
 326     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 327     break;
 328   default:
 329     error("sim_io_write_stdout: unaccounted switch\n");
 330     break;
 331   }
 332   return 0;
 333 }
 334
 335 int
 336 sim_io_write_stderr(const char *buf,
 337                     int sizeof_buf)
 338 {
 339   switch (CURRENT_STDIO) {
 340   case DO_USE_STDIO:
 341     /* NB: I think there should be an explicit write_stderr callback */
 342     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 343     break;
 344   case DONT_USE_STDIO:
 345     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 346     break;
 347   default:
 348     error("sim_io_write_stderr: unaccounted switch\n");
 349     break;
 350   }
 351   return 0;
 352 }
 353
 354
 355 void
 356 sim_io_printf_filtered(const char *fmt,
 357                        ...)
 358 {
 359   char message[1024];
 360   va_list ap;
 361   /* format the message */
 362   va_start(ap, fmt);
 363   vsprintf(message, fmt, ap);
 364   va_end(ap);
 365   /* sanity check */
 366   if (strlen(message) >= sizeof(message))
 367     error("sim_io_printf_filtered: buffer overflow\n");
 368   callbacks->printf_filtered(callbacks, "%s", message);
 369 }
 370
 371 void
 372 sim_io_flush_stdoutput(void)
 373 {
 374   switch (CURRENT_STDIO) {
 375   case DO_USE_STDIO:
 376     callbacks->flush_stdout (callbacks);
 377     break;
 378   case DONT_USE_STDIO:
 379     break;
 380   default:
 381     error("sim_io_read_stdin: unaccounted switch\n");
 382     break;
 383   }
 384 }
 385
 386 /****/
 387
 388 void *
 389 zalloc(long size)
 390 {
 391   void *memory = (void*)xmalloc(size);
 392   if (memory == NULL)
 393     error("xmalloc failed\n");
 394   memset(memory, 0, size);
 395   return memory;
 396 }
 397
 398 void zfree(void *data)
 399 {
 400   free(NULL, data);
 401 }