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   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 165                     entry_point));
 166
 167   if (simulator == NULL)
 168     error ("No program loaded");
 169
 170   if (abfd != NULL)
 171     entry_point = bfd_get_start_address (abfd);
 172   else
 173     entry_point = 0xfff00000; /* ??? */
 174
 175   psim_init(simulator);
 176   psim_stack(simulator, argv, envp);
 177
 178   ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
 179                               &entry_point, "pc", cooked_transfer) > 0);
 180   return SIM_RC_OK;
 181 }
 182
 183
 184 void
 185 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 186 {
 187   psim_status status = psim_get_status(simulator);
 188
 189   switch (status.reason) {
 190   case was_continuing:
 191     *reason = sim_stopped;
 192     if (status.signal == 0)
 193       *sigrc = GDB_SIGNAL_TRAP;
 194     else
 195       *sigrc = status.signal;
 196     break;
 197   case was_trap:
 198     *reason = sim_stopped;
 199     *sigrc = GDB_SIGNAL_TRAP;
 200     break;
 201   case was_exited:
 202     *reason = sim_exited;
 203     *sigrc = status.signal;
 204     break;
 205   case was_signalled:
 206     *reason = sim_signalled;
 207     *sigrc = status.signal;
 208     break;
 209   }
 210
 211   TRACE(trace_gdb, ("sim_stop_reason(reason=%p(%ld), sigrc=%p(%ld))\n",
 212                     reason, (long)*reason, sigrc, (long)*sigrc));
 213 }
 214
 215
 216
 217 /* Run (or resume) the program.  */
 218
 219 int
 220 sim_stop (SIM_DESC sd)
 221 {
 222   psim_stop (simulator);
 223   return 1;
 224 }
 225
 226 void
 227 sim_resume (SIM_DESC sd, int step, int siggnal)
 228 {
 229   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 230                     step, siggnal));
 231
 232   if (step)
 233     {
 234       psim_step (simulator);
 235     }
 236   else
 237     {
 238       psim_run (simulator);
 239     }
 240 }
 241
 242 void
 243 sim_do_command (SIM_DESC sd, const char *cmd)
 244 {
 245   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 246                     cmd ? cmd : "(null)"));
 247   if (cmd != NULL) {
 248     char **argv = buildargv(cmd);
 249     psim_command(root_device, argv);
 250     freeargv(argv);
 251   }
 252 }
 253
 254 char **
 255 sim_complete_command (SIM_DESC sd, const char *text, const char *word)
 256 {
 257   return NULL;
 258 }
 259
 260 char *
 261 sim_memory_map (SIM_DESC sd)
 262 {
 263   return NULL;
 264 }
 265
 266 /* Polling, if required */
 267
 268 void
 269 sim_io_poll_quit (void)
 270 {
 271   if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
 272     {
 273       poll_quit_count = POLL_QUIT_INTERVAL;
 274       if (callbacks->poll_quit (callbacks))
 275         psim_stop (simulator);
 276     }
 277 }
 278
 279
 280
 281 /* Map simulator IO operations onto the corresponding GDB I/O
 282    functions.
 283
 284    NB: Only a limited subset of operations are mapped across.  More
 285    advanced operations (such as dup or write) must either be mapped to
 286    one of the below calls or handled internally */
 287
 288 int
 289 sim_io_read_stdin(char *buf,
 290                   int sizeof_buf)
 291 {
 292   switch (CURRENT_STDIO) {
 293   case DO_USE_STDIO:
 294     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 295     break;
 296   case DONT_USE_STDIO:
 297     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 298     break;
 299   default:
 300     error("sim_io_read_stdin: unaccounted switch\n");
 301     break;
 302   }
 303   return 0;
 304 }
 305
 306 int
 307 sim_io_write_stdout(const char *buf,
 308                     int sizeof_buf)
 309 {
 310   switch (CURRENT_STDIO) {
 311   case DO_USE_STDIO:
 312     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 313     break;
 314   case DONT_USE_STDIO:
 315     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 316     break;
 317   default:
 318     error("sim_io_write_stdout: unaccounted switch\n");
 319     break;
 320   }
 321   return 0;
 322 }
 323
 324 int
 325 sim_io_write_stderr(const char *buf,
 326                     int sizeof_buf)
 327 {
 328   switch (CURRENT_STDIO) {
 329   case DO_USE_STDIO:
 330     /* NB: I think there should be an explicit write_stderr callback */
 331     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 332     break;
 333   case DONT_USE_STDIO:
 334     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 335     break;
 336   default:
 337     error("sim_io_write_stderr: unaccounted switch\n");
 338     break;
 339   }
 340   return 0;
 341 }
 342
 343
 344 void
 345 sim_io_printf_filtered(const char *fmt,
 346                        ...)
 347 {
 348   char message[1024];
 349   va_list ap;
 350   /* format the message */
 351   va_start(ap, fmt);
 352   vsprintf(message, fmt, ap);
 353   va_end(ap);
 354   /* sanity check */
 355   if (strlen(message) >= sizeof(message))
 356     error("sim_io_printf_filtered: buffer overflow\n");
 357   callbacks->printf_filtered(callbacks, "%s", message);
 358 }
 359
 360 void
 361 sim_io_flush_stdoutput(void)
 362 {
 363   switch (CURRENT_STDIO) {
 364   case DO_USE_STDIO:
 365     callbacks->flush_stdout (callbacks);
 366     break;
 367   case DONT_USE_STDIO:
 368     break;
 369   default:
 370     error("sim_io_read_stdin: unaccounted switch\n");
 371     break;
 372   }
 373 }
 374
 375 /* Glue to use sim-fpu module.  */
 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   /* Printing a space here avoids empty printf compiler warnings.  Not ideal,
 385      but we want error's side-effect where it halts processing.  */
 386   callbacks->error (callbacks, " ");
 387 }
 388
 389 /****/
 390
 391 void ATTRIBUTE_NORETURN
 392 error (const char *msg, ...)
 393 {
 394   va_list ap;
 395   va_start(ap, msg);
 396   callbacks->evprintf_filtered (callbacks, msg, ap);
 397   va_end(ap);
 398   /* Printing a space here avoids empty printf compiler warnings.  Not ideal,
 399      but we want error's side-effect where it halts processing.  */
 400   callbacks->error (callbacks, " ");
 401 }
 402
 403 void *
 404 zalloc(long size)
 405 {
 406   void *memory = (void*)xmalloc(size);
 407   if (memory == NULL)
 408     error("xmalloc failed\n");
 409   memset(memory, 0, size);
 410   return memory;
 411 }