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 uint64_t
 128 sim_read (SIM_DESC sd, uint64_t addr, void *buf, uint64_t length)
 129 {
 130   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 131                                 buf, addr, length);
 132   TRACE(trace_gdb,
 133         ("sim_read(addr=0x%" PRIx64 ", buf=%p, length=%" PRIx64 ") = %d\n",
 134          addr, buf, length, result));
 135   return result;
 136 }
 137
 138
 139 uint64_t
 140 sim_write (SIM_DESC sd, uint64_t addr, const void *buf, uint64_t length)
 141 {
 142   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 143                                  buf, addr, length,
 144                                  1/*violate_ro*/);
 145   TRACE(trace_gdb,
 146         ("sim_write(addr=0x%" PRIx64 ", buf=%p, length=%" PRIx64 ") = %d\n",
 147          addr, buf, length, result));
 148   return result;
 149 }
 150
 151 void
 152 sim_info (SIM_DESC sd, bool verbose)
 153 {
 154   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 155   psim_print_info (simulator, verbose);
 156 }
 157
 158
 159 SIM_RC
 160 sim_create_inferior (SIM_DESC sd,
 161                      struct bfd *abfd,
 162                      char * const *argv,
 163                      char * const *envp)
 164 {
 165   unsigned_word 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   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 176                     entry_point));
 177
 178   psim_init(simulator);
 179   psim_stack(simulator, argv, envp);
 180
 181   ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
 182                               &entry_point, "pc", cooked_transfer) > 0);
 183   return SIM_RC_OK;
 184 }
 185
 186
 187 void
 188 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 189 {
 190   psim_status status = psim_get_status(simulator);
 191
 192   switch (status.reason) {
 193   case was_continuing:
 194     *reason = sim_stopped;
 195     if (status.signal == 0)
 196       *sigrc = GDB_SIGNAL_TRAP;
 197     else
 198       *sigrc = status.signal;
 199     break;
 200   case was_trap:
 201     *reason = sim_stopped;
 202     *sigrc = GDB_SIGNAL_TRAP;
 203     break;
 204   case was_exited:
 205     *reason = sim_exited;
 206     *sigrc = status.signal;
 207     break;
 208   case was_signalled:
 209     *reason = sim_signalled;
 210     *sigrc = status.signal;
 211     break;
 212   }
 213
 214   TRACE(trace_gdb, ("sim_stop_reason(reason=%p(%ld), sigrc=%p(%ld))\n",
 215                     reason, (long)*reason, sigrc, (long)*sigrc));
 216 }
 217
 218
 219
 220 /* Run (or resume) the program.  */
 221
 222 int
 223 sim_stop (SIM_DESC sd)
 224 {
 225   psim_stop (simulator);
 226   return 1;
 227 }
 228
 229 void
 230 sim_resume (SIM_DESC sd, int step, int siggnal)
 231 {
 232   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 233                     step, siggnal));
 234
 235   if (step)
 236     {
 237       psim_step (simulator);
 238     }
 239   else
 240     {
 241       psim_run (simulator);
 242     }
 243 }
 244
 245 void
 246 sim_do_command (SIM_DESC sd, const char *cmd)
 247 {
 248   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 249                     cmd ? cmd : "(null)"));
 250   if (cmd != NULL) {
 251     char **argv = buildargv(cmd);
 252     psim_command(root_device, argv);
 253     freeargv(argv);
 254   }
 255 }
 256
 257 char **
 258 sim_complete_command (SIM_DESC sd, const char *text, const char *word)
 259 {
 260   return NULL;
 261 }
 262
 263 char *
 264 sim_memory_map (SIM_DESC sd)
 265 {
 266   return NULL;
 267 }
 268
 269 /* Polling, if required */
 270
 271 void
 272 sim_io_poll_quit (void)
 273 {
 274   if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
 275     {
 276       poll_quit_count = POLL_QUIT_INTERVAL;
 277       if (callbacks->poll_quit (callbacks))
 278         psim_stop (simulator);
 279     }
 280 }
 281
 282
 283
 284 /* Map simulator IO operations onto the corresponding GDB I/O
 285    functions.
 286
 287    NB: Only a limited subset of operations are mapped across.  More
 288    advanced operations (such as dup or write) must either be mapped to
 289    one of the below calls or handled internally */
 290
 291 int
 292 sim_io_read_stdin(char *buf,
 293                   int sizeof_buf)
 294 {
 295   switch (CURRENT_STDIO) {
 296   case DO_USE_STDIO:
 297     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 298     break;
 299   case DONT_USE_STDIO:
 300     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 301     break;
 302   default:
 303     error("sim_io_read_stdin: unaccounted switch\n");
 304     break;
 305   }
 306   return 0;
 307 }
 308
 309 int
 310 sim_io_write_stdout(const char *buf,
 311                     int sizeof_buf)
 312 {
 313   switch (CURRENT_STDIO) {
 314   case DO_USE_STDIO:
 315     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 316     break;
 317   case DONT_USE_STDIO:
 318     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 319     break;
 320   default:
 321     error("sim_io_write_stdout: unaccounted switch\n");
 322     break;
 323   }
 324   return 0;
 325 }
 326
 327 int
 328 sim_io_write_stderr(const char *buf,
 329                     int sizeof_buf)
 330 {
 331   switch (CURRENT_STDIO) {
 332   case DO_USE_STDIO:
 333     /* NB: I think there should be an explicit write_stderr callback */
 334     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 335     break;
 336   case DONT_USE_STDIO:
 337     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 338     break;
 339   default:
 340     error("sim_io_write_stderr: unaccounted switch\n");
 341     break;
 342   }
 343   return 0;
 344 }
 345
 346
 347 void
 348 sim_io_printf_filtered(const char *fmt,
 349                        ...)
 350 {
 351   char message[1024];
 352   va_list ap;
 353   /* format the message */
 354   va_start(ap, fmt);
 355   vsprintf(message, fmt, ap);
 356   va_end(ap);
 357   /* sanity check */
 358   if (strlen(message) >= sizeof(message))
 359     error("sim_io_printf_filtered: buffer overflow\n");
 360   callbacks->printf_filtered(callbacks, "%s", message);
 361 }
 362
 363 void
 364 sim_io_flush_stdoutput(void)
 365 {
 366   switch (CURRENT_STDIO) {
 367   case DO_USE_STDIO:
 368     callbacks->flush_stdout (callbacks);
 369     break;
 370   case DONT_USE_STDIO:
 371     break;
 372   default:
 373     error("sim_io_read_stdin: unaccounted switch\n");
 374     break;
 375   }
 376 }
 377
 378 /* Glue to use sim-fpu module.  */
 379
 380 void
 381 sim_io_error (SIM_DESC sd, const char *fmt, ...)
 382 {
 383   va_list ap;
 384   va_start(ap, fmt);
 385   callbacks->evprintf_filtered (callbacks, fmt, ap);
 386   va_end(ap);
 387   /* Printing a space here avoids empty printf compiler warnings.  Not ideal,
 388      but we want error's side-effect where it halts processing.  */
 389   callbacks->error (callbacks, " ");
 390 }
 391
 392 /****/
 393
 394 void
 395 error (const char *msg, ...)
 396 {
 397   va_list ap;
 398   va_start(ap, msg);
 399   callbacks->evprintf_filtered (callbacks, msg, ap);
 400   va_end(ap);
 401   /* Printing a space here avoids empty printf compiler warnings.  Not ideal,
 402      but we want error's side-effect where it halts processing.  */
 403   callbacks->error (callbacks, " ");
 404 }
 405
 406 void *
 407 zalloc(long size)
 408 {
 409   void *memory = (void*)xmalloc(size);
 410   if (memory == NULL)
 411     error("xmalloc failed\n");
 412   memset(memory, 0, size);
 413   return memory;
 414 }