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 "libiberty.h"
  34 #include "bfd.h"
  35 #include "sim/callback.h"
  36 #include "sim/sim.h"
  37 #include "gdb/signals.h"
  38
  39 /* Define the rate at which the simulator should poll the host
  40    for a quit. */
  41 #ifndef POLL_QUIT_INTERVAL
  42 #define POLL_QUIT_INTERVAL 0x20
  43 #endif
  44
  45 static int poll_quit_count = POLL_QUIT_INTERVAL;
  46
  47 /* Structures used by the simulator, for gdb just have static structures */
  48
  49 psim *simulator;
  50 static device *root_device;
  51 static host_callback *callbacks;
  52
  53 SIM_DESC
  54 sim_open (SIM_OPEN_KIND kind,
  55           host_callback *callback,
  56           struct bfd *abfd,
  57           char * const *argv)
  58 {
  59   callbacks = callback;
  60
  61   /* Note: The simulation is not created by sim_open() because
  62      complete information is not yet available */
  63   /* trace the call */
  64   TRACE(trace_gdb, ("sim_open called\n"));
  65
  66   if (root_device != NULL)
  67     sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
  68   root_device = psim_tree();
  69   simulator = NULL;
  70
  71   if (psim_options (root_device, argv + 1, kind) == NULL)
  72     return NULL;
  73
  74   if (ppc_trace[trace_opts])
  75     print_options ();
  76
  77   /* fudge our descriptor for now */
  78   return (SIM_DESC) 1;
  79 }
  80
  81
  82 void
  83 sim_close (SIM_DESC sd, int quitting)
  84 {
  85   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  86   if (ppc_trace[trace_print_info] && simulator != NULL)
  87     psim_print_info (simulator, ppc_trace[trace_print_info]);
  88 }
  89
  90
  91 SIM_RC
  92 sim_load (SIM_DESC sd, const char *prog, bfd *abfd, int from_tty)
  93 {
  94   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
  95                     prog, from_tty));
  96   ASSERT(prog != NULL);
  97
  98   /* create the simulator */
  99   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 100   simulator = psim_create(prog, root_device);
 101
 102   /* bring in all the data section */
 103   psim_init(simulator);
 104
 105   /* get the start address */
 106   if (abfd == NULL)
 107     {
 108       abfd = bfd_openr (prog, 0);
 109       if (abfd == NULL)
 110         error ("psim: can't open \"%s\": %s\n",
 111                prog, bfd_errmsg (bfd_get_error ()));
 112       if (!bfd_check_format (abfd, bfd_object))
 113         {
 114           const char *errmsg = bfd_errmsg (bfd_get_error ());
 115           bfd_close (abfd);
 116           error ("psim: \"%s\" is not an object file: %s\n",
 117                  prog, errmsg);
 118         }
 119       bfd_close (abfd);
 120     }
 121
 122   return SIM_RC_OK;
 123 }
 124
 125
 126 int
 127 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 128 {
 129   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 130                                 buf, mem, length);
 131   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 132                     (long)mem, (long)buf, length, result));
 133   return result;
 134 }
 135
 136
 137 int
 138 sim_write (SIM_DESC sd, SIM_ADDR mem, const unsigned char *buf, int length)
 139 {
 140   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 141                                  buf, mem, length,
 142                                  1/*violate_ro*/);
 143   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 144                     (long)mem, (long)buf, length, result));
 145   return result;
 146 }
 147
 148 void
 149 sim_info (SIM_DESC sd, int verbose)
 150 {
 151   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 152   psim_print_info (simulator, verbose);
 153 }
 154
 155
 156 SIM_RC
 157 sim_create_inferior (SIM_DESC sd,
 158                      struct bfd *abfd,
 159                      char * const *argv,
 160                      char * const *envp)
 161 {
 162   unsigned_word entry_point;
 163   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 164                     entry_point));
 165
 166   if (simulator == NULL)
 167     error ("No program loaded");
 168
 169   if (abfd != NULL)
 170     entry_point = bfd_get_start_address (abfd);
 171   else
 172     entry_point = 0xfff00000; /* ??? */
 173
 174   psim_init(simulator);
 175   psim_stack(simulator, argv, envp);
 176
 177   ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
 178                               &entry_point, "pc", cooked_transfer) > 0);
 179   return SIM_RC_OK;
 180 }
 181
 182
 183 void
 184 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 185 {
 186   psim_status status = psim_get_status(simulator);
 187
 188   switch (status.reason) {
 189   case was_continuing:
 190     *reason = sim_stopped;
 191     if (status.signal == 0)
 192       *sigrc = GDB_SIGNAL_TRAP;
 193     else
 194       *sigrc = status.signal;
 195     break;
 196   case was_trap:
 197     *reason = sim_stopped;
 198     *sigrc = GDB_SIGNAL_TRAP;
 199     break;
 200   case was_exited:
 201     *reason = sim_exited;
 202     *sigrc = status.signal;
 203     break;
 204   case was_signalled:
 205     *reason = sim_signalled;
 206     *sigrc = status.signal;
 207     break;
 208   }
 209
 210   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 211                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 212 }
 213
 214
 215
 216 /* Run (or resume) the program.  */
 217
 218 int
 219 sim_stop (SIM_DESC sd)
 220 {
 221   psim_stop (simulator);
 222   return 1;
 223 }
 224
 225 void
 226 sim_resume (SIM_DESC sd, int step, int siggnal)
 227 {
 228   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 229                     step, siggnal));
 230
 231   if (step)
 232     {
 233       psim_step (simulator);
 234     }
 235   else
 236     {
 237       psim_run (simulator);
 238     }
 239 }
 240
 241 void
 242 sim_do_command (SIM_DESC sd, const char *cmd)
 243 {
 244   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 245                     cmd ? cmd : "(null)"));
 246   if (cmd != NULL) {
 247     char **argv = buildargv(cmd);
 248     psim_command(root_device, argv);
 249     freeargv(argv);
 250   }
 251 }
 252
 253 char **
 254 sim_complete_command (SIM_DESC sd, const char *text, const char *word)
 255 {
 256   return NULL;
 257 }
 258
 259 char *
 260 sim_memory_map (SIM_DESC sd)
 261 {
 262   return NULL;
 263 }
 264
 265 /* Polling, if required */
 266
 267 void
 268 sim_io_poll_quit (void)
 269 {
 270   if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
 271     {
 272       poll_quit_count = POLL_QUIT_INTERVAL;
 273       if (callbacks->poll_quit (callbacks))
 274         psim_stop (simulator);
 275     }
 276 }
 277
 278
 279
 280 /* Map simulator IO operations onto the corresponding GDB I/O
 281    functions.
 282
 283    NB: Only a limited subset of operations are mapped across.  More
 284    advanced operations (such as dup or write) must either be mapped to
 285    one of the below calls or handled internally */
 286
 287 int
 288 sim_io_read_stdin(char *buf,
 289                   int sizeof_buf)
 290 {
 291   switch (CURRENT_STDIO) {
 292   case DO_USE_STDIO:
 293     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 294     break;
 295   case DONT_USE_STDIO:
 296     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 297     break;
 298   default:
 299     error("sim_io_read_stdin: unaccounted switch\n");
 300     break;
 301   }
 302   return 0;
 303 }
 304
 305 int
 306 sim_io_write_stdout(const char *buf,
 307                     int sizeof_buf)
 308 {
 309   switch (CURRENT_STDIO) {
 310   case DO_USE_STDIO:
 311     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 312     break;
 313   case DONT_USE_STDIO:
 314     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 315     break;
 316   default:
 317     error("sim_io_write_stdout: unaccounted switch\n");
 318     break;
 319   }
 320   return 0;
 321 }
 322
 323 int
 324 sim_io_write_stderr(const char *buf,
 325                     int sizeof_buf)
 326 {
 327   switch (CURRENT_STDIO) {
 328   case DO_USE_STDIO:
 329     /* NB: I think there should be an explicit write_stderr callback */
 330     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 331     break;
 332   case DONT_USE_STDIO:
 333     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 334     break;
 335   default:
 336     error("sim_io_write_stderr: unaccounted switch\n");
 337     break;
 338   }
 339   return 0;
 340 }
 341
 342
 343 void
 344 sim_io_printf_filtered(const char *fmt,
 345                        ...)
 346 {
 347   char message[1024];
 348   va_list ap;
 349   /* format the message */
 350   va_start(ap, fmt);
 351   vsprintf(message, fmt, ap);
 352   va_end(ap);
 353   /* sanity check */
 354   if (strlen(message) >= sizeof(message))
 355     error("sim_io_printf_filtered: buffer overflow\n");
 356   callbacks->printf_filtered(callbacks, "%s", message);
 357 }
 358
 359 void
 360 sim_io_flush_stdoutput(void)
 361 {
 362   switch (CURRENT_STDIO) {
 363   case DO_USE_STDIO:
 364     callbacks->flush_stdout (callbacks);
 365     break;
 366   case DONT_USE_STDIO:
 367     break;
 368   default:
 369     error("sim_io_read_stdin: unaccounted switch\n");
 370     break;
 371   }
 372 }
 373
 374 void
 375 sim_io_error (SIM_DESC sd, const char *fmt, ...)
 376 {
 377   va_list ap;
 378   va_start(ap, fmt);
 379   callbacks->evprintf_filtered (callbacks, fmt, ap);
 380   va_end(ap);
 381   callbacks->error (callbacks, "");
 382 }
 383
 384 /****/
 385
 386 void NORETURN
 387 error (const char *msg, ...)
 388 {
 389   va_list ap;
 390   va_start(ap, msg);
 391   callbacks->evprintf_filtered (callbacks, msg, ap);
 392   va_end(ap);
 393   callbacks->error (callbacks, "");
 394 }
 395
 396 void *
 397 zalloc(long size)
 398 {
 399   void *memory = (void*)xmalloc(size);
 400   if (memory == NULL)
 401     error("xmalloc failed\n");
 402   memset(memory, 0, size);
 403   return memory;
 404 }