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 /* For communication between sim_load and sim_create_inferior.
  57    This can be made to go away, please do.  */
  58 static unsigned_word entry_point;
  59
  60 SIM_DESC
  61 sim_open (SIM_OPEN_KIND kind,
  62           host_callback *callback,
  63           struct _bfd *abfd,
  64           char **argv)
  65 {
  66   callbacks = callback;
  67
  68   /* Note: The simulation is not created by sim_open() because
  69      complete information is not yet available */
  70   /* trace the call */
  71   TRACE(trace_gdb, ("sim_open called\n"));
  72
  73   if (root_device != NULL)
  74     sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
  75   root_device = psim_tree();
  76   simulator = NULL;
  77
  78   psim_options(root_device, argv + 1);
  79
  80   if (ppc_trace[trace_opts])
  81     print_options ();
  82
  83   /* fudge our descriptor for now */
  84   return (SIM_DESC) 1;
  85 }
  86
  87
  88 void
  89 sim_close (SIM_DESC sd, int quitting)
  90 {
  91   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  92   if (ppc_trace[trace_print_info] && simulator != NULL)
  93     psim_print_info (simulator, ppc_trace[trace_print_info]);
  94 }
  95
  96
  97 SIM_RC
  98 sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
  99 {
 100   char **argv;
 101   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
 102                     prog, from_tty));
 103   ASSERT(prog != NULL);
 104
 105   /* parse the arguments, assume that the file is argument 0 */
 106   argv = buildargv(prog);
 107   ASSERT(argv != NULL && argv[0] != NULL);
 108
 109   /* create the simulator */
 110   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 111   simulator = psim_create(argv[0], root_device);
 112
 113   /* bring in all the data section */
 114   psim_init(simulator);
 115
 116   /* release the arguments */
 117   freeargv(argv);
 118
 119   /* get the start address */
 120   if (abfd != NULL)
 121     entry_point = bfd_get_start_address (abfd);
 122   else
 123     {
 124       abfd = bfd_openr (argv[0], 0);
 125       if (abfd == NULL)
 126         error ("psim: can't open \"%s\": %s\n",
 127                argv[0], bfd_errmsg (bfd_get_error ()));
 128       if (!bfd_check_format (abfd, bfd_object))
 129         {
 130           const char *errmsg = bfd_errmsg (bfd_get_error ());
 131           bfd_close (abfd);
 132           error ("psim: \"%s\" is not an object file: %s\n",
 133                  argv[0], errmsg);
 134         }
 135       entry_point = bfd_get_start_address (abfd);
 136       bfd_close (abfd);
 137     }
 138
 139   return SIM_RC_OK;
 140 }
 141
 142
 143 void
 144 sim_kill (SIM_DESC sd)
 145 {
 146   TRACE(trace_gdb, ("sim_kill(void) called\n"));
 147   /* do nothing, nothing to do */
 148 }
 149
 150
 151 int
 152 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 153 {
 154   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 155                                 buf, mem, length);
 156   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 157                     (long)mem, (long)buf, length, result));
 158   return result;
 159 }
 160
 161
 162 int
 163 sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 164 {
 165   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 166                                  buf, mem, length,
 167                                  1/*violate_ro*/);
 168   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 169                     (long)mem, (long)buf, length, result));
 170   return result;
 171 }
 172
 173
 174 void
 175 sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf)
 176 {
 177   if (simulator == NULL) {
 178     return;
 179   }
 180   TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
 181                     regno, register_names[regno], (long)buf));
 182   psim_read_register(simulator, MAX_NR_PROCESSORS,
 183                      buf, register_names[regno],
 184                      raw_transfer);
 185 }
 186
 187
 188 void
 189 sim_store_register (SIM_DESC sd, int regno, unsigned char *buf)
 190 {
 191   if (simulator == NULL)
 192     return;
 193   TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
 194                     regno, register_names[regno], (long)buf));
 195   psim_write_register(simulator, MAX_NR_PROCESSORS,
 196                       buf, register_names[regno],
 197                       raw_transfer);
 198 }
 199
 200
 201 void
 202 sim_info (SIM_DESC sd, int verbose)
 203 {
 204   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 205   psim_print_info (simulator, verbose);
 206 }
 207
 208
 209 SIM_RC
 210 sim_create_inferior (SIM_DESC sd, char **argv, char **envp)
 211 {
 212   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 213                     entry_point));
 214
 215   psim_init(simulator);
 216   psim_stack(simulator, argv, envp);
 217
 218   psim_write_register(simulator, -1 /* all start at same PC */,
 219                       &entry_point, "pc", cooked_transfer);
 220   return SIM_RC_OK;
 221 }
 222
 223
 224 void
 225 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 226 {
 227   psim_status status = psim_get_status(simulator);
 228
 229   switch (status.reason) {
 230   case was_continuing:
 231     *reason = sim_stopped;
 232     if (status.signal == 0)
 233       *sigrc = SIGTRAP;
 234     else
 235       *sigrc = status.signal;
 236     break;
 237   case was_trap:
 238     *reason = sim_stopped;
 239     *sigrc = SIGTRAP;
 240     break;
 241   case was_exited:
 242     *reason = sim_exited;
 243     *sigrc = status.signal;
 244     break;
 245   case was_signalled:
 246     *reason = sim_signalled;
 247     *sigrc = status.signal;
 248     break;
 249   }
 250
 251   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 252                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 253 }
 254
 255
 256
 257 /* Run (or resume) the program.  */
 258
 259 int
 260 sim_stop (SIM_DESC sd)
 261 {
 262   psim_stop (simulator);
 263   return 1;
 264 }
 265
 266 void
 267 sim_resume (SIM_DESC sd, int step, int siggnal)
 268 {
 269   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 270                     step, siggnal));
 271
 272   if (step)
 273     {
 274       psim_step (simulator);
 275     }
 276   else
 277     {
 278       psim_run (simulator);
 279     }
 280 }
 281
 282 void
 283 sim_do_command (SIM_DESC sd, char *cmd)
 284 {
 285   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 286                     cmd ? cmd : "(null)"));
 287   if (cmd != NULL) {
 288     char **argv = buildargv(cmd);
 289     psim_command(root_device, argv);
 290     freeargv(argv);
 291   }
 292 }
 293
 294
 295 /* Map simulator IO operations onto the corresponding GDB I/O
 296    functions.
 297
 298    NB: Only a limited subset of operations are mapped across.  More
 299    advanced operations (such as dup or write) must either be mapped to
 300    one of the below calls or handled internally */
 301
 302 int
 303 sim_io_read_stdin(char *buf,
 304                   int sizeof_buf)
 305 {
 306   switch (CURRENT_STDIO) {
 307   case DO_USE_STDIO:
 308     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 309     break;
 310   case DONT_USE_STDIO:
 311     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 312     break;
 313   default:
 314     error("sim_io_read_stdin: unaccounted switch\n");
 315     break;
 316   }
 317   return 0;
 318 }
 319
 320 int
 321 sim_io_write_stdout(const char *buf,
 322                     int sizeof_buf)
 323 {
 324   switch (CURRENT_STDIO) {
 325   case DO_USE_STDIO:
 326     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 327     break;
 328   case DONT_USE_STDIO:
 329     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 330     break;
 331   default:
 332     error("sim_io_write_stdout: unaccounted switch\n");
 333     break;
 334   }
 335   return 0;
 336 }
 337
 338 int
 339 sim_io_write_stderr(const char *buf,
 340                     int sizeof_buf)
 341 {
 342   switch (CURRENT_STDIO) {
 343   case DO_USE_STDIO:
 344     /* NB: I think there should be an explicit write_stderr callback */
 345     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 346     break;
 347   case DONT_USE_STDIO:
 348     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 349     break;
 350   default:
 351     error("sim_io_write_stderr: unaccounted switch\n");
 352     break;
 353   }
 354   return 0;
 355 }
 356
 357
 358 void
 359 sim_io_printf_filtered(const char *fmt,
 360                        ...)
 361 {
 362   char message[1024];
 363   va_list ap;
 364   /* format the message */
 365   va_start(ap, fmt);
 366   vsprintf(message, fmt, ap);
 367   va_end(ap);
 368   /* sanity check */
 369   if (strlen(message) >= sizeof(message))
 370     error("sim_io_printf_filtered: buffer overflow\n");
 371   callbacks->printf_filtered(callbacks, "%s", message);
 372 }
 373
 374 void
 375 sim_io_flush_stdoutput(void)
 376 {
 377   switch (CURRENT_STDIO) {
 378   case DO_USE_STDIO:
 379     gdb_flush (gdb_stdout);
 380     break;
 381   case DONT_USE_STDIO:
 382     break;
 383   default:
 384     error("sim_io_read_stdin: unaccounted switch\n");
 385     break;
 386   }
 387 }
 388
 389 /****/
 390
 391 void *
 392 zalloc(long size)
 393 {
 394   void *memory = (void*)xmalloc(size);
 395   if (memory == NULL)
 396     error("xmalloc failed\n");
 397   memset(memory, 0, size);
 398   return memory;
 399 }
 400
 401 void zfree(void *data)
 402 {
 403   mfree(NULL, data);
 404 }