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