gnu/dist/gdb6/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 "libiberty.h"
  44 #include "bfd.h"
  45 #include "gdb/callback.h"
  46 #include "gdb/remote-sim.h"
  47 #include "gdb/signals.h"
  48
  49 /* Define the rate at which the simulator should poll the host
  50    for a quit. */
  51 #ifndef POLL_QUIT_INTERVAL
  52 #define POLL_QUIT_INTERVAL 0x20
  53 #endif
  54
  55 static int poll_quit_count = POLL_QUIT_INTERVAL;
  56
  57 /* Structures used by the simulator, for gdb just have static structures */
  58
  59 psim *simulator;
  60 static device *root_device;
  61 static host_callback *callbacks;
  62
  63 SIM_DESC
  64 sim_open (SIM_OPEN_KIND kind,
  65           host_callback *callback,
  66           struct bfd *abfd,
  67           char **argv)
  68 {
  69   callbacks = callback;
  70
  71   /* Note: The simulation is not created by sim_open() because
  72      complete information is not yet available */
  73   /* trace the call */
  74   TRACE(trace_gdb, ("sim_open called\n"));
  75
  76   if (root_device != NULL)
  77     sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
  78   root_device = psim_tree();
  79   simulator = NULL;
  80
  81   psim_options(root_device, argv + 1);
  82
  83   if (ppc_trace[trace_opts])
  84     print_options ();
  85
  86   /* fudge our descriptor for now */
  87   return (SIM_DESC) 1;
  88 }
  89
  90
  91 void
  92 sim_close (SIM_DESC sd, int quitting)
  93 {
  94   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  95   if (ppc_trace[trace_print_info] && simulator != NULL)
  96     psim_print_info (simulator, ppc_trace[trace_print_info]);
  97 }
  98
  99
 100 SIM_RC
 101 sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
 102 {
 103   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
 104                     prog, from_tty));
 105   ASSERT(prog != NULL);
 106
 107   /* create the simulator */
 108   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 109   simulator = psim_create(prog, root_device);
 110
 111   /* bring in all the data section */
 112   psim_init(simulator);
 113
 114   /* get the start address */
 115   if (abfd == NULL)
 116     {
 117       abfd = bfd_openr (prog, 0);
 118       if (abfd == NULL)
 119         error ("psim: can't open \"%s\": %s\n",
 120                prog, bfd_errmsg (bfd_get_error ()));
 121       if (!bfd_check_format (abfd, bfd_object))
 122         {
 123           const char *errmsg = bfd_errmsg (bfd_get_error ());
 124           bfd_close (abfd);
 125           error ("psim: \"%s\" is not an object file: %s\n",
 126                  prog, errmsg);
 127         }
 128       bfd_close (abfd);
 129     }
 130
 131   return SIM_RC_OK;
 132 }
 133
 134
 135 int
 136 sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 137 {
 138   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 139                                 buf, mem, length);
 140   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 141                     (long)mem, (long)buf, length, result));
 142   return result;
 143 }
 144
 145
 146 int
 147 sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
 148 {
 149   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 150                                  buf, mem, length,
 151                                  1/*violate_ro*/);
 152   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 153                     (long)mem, (long)buf, length, result));
 154   return result;
 155 }
 156
 157 void
 158 sim_info (SIM_DESC sd, int verbose)
 159 {
 160   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 161   psim_print_info (simulator, verbose);
 162 }
 163
 164
 165 SIM_RC
 166 sim_create_inferior (SIM_DESC sd,
 167                      struct bfd *abfd,
 168                      char **argv,
 169                      char **envp)
 170 {
 171   unsigned_word entry_point;
 172   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 173                     entry_point));
 174
 175   if (simulator == NULL)
 176     error ("No program loaded");
 177
 178   if (abfd != NULL)
 179     entry_point = bfd_get_start_address (abfd);
 180   else
 181     entry_point = 0xfff00000; /* ??? */
 182
 183   psim_init(simulator);
 184   psim_stack(simulator, argv, envp);
 185
 186   ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
 187                               &entry_point, "pc", cooked_transfer) > 0);
 188   return SIM_RC_OK;
 189 }
 190
 191
 192 void
 193 sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
 194 {
 195   psim_status status = psim_get_status(simulator);
 196
 197   switch (status.reason) {
 198   case was_continuing:
 199     *reason = sim_stopped;
 200     if (status.signal == 0)
 201       *sigrc = TARGET_SIGNAL_TRAP;
 202     else
 203       *sigrc = status.signal;
 204     break;
 205   case was_trap:
 206     *reason = sim_stopped;
 207     *sigrc = TARGET_SIGNAL_TRAP;
 208     break;
 209   case was_exited:
 210     *reason = sim_exited;
 211     *sigrc = status.signal;
 212     break;
 213   case was_signalled:
 214     *reason = sim_signalled;
 215     *sigrc = status.signal;
 216     break;
 217   }
 218
 219   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 220                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 221 }
 222
 223
 224
 225 /* Run (or resume) the program.  */
 226
 227 int
 228 sim_stop (SIM_DESC sd)
 229 {
 230   psim_stop (simulator);
 231   return 1;
 232 }
 233
 234 void
 235 sim_resume (SIM_DESC sd, int step, int siggnal)
 236 {
 237   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 238                     step, siggnal));
 239
 240   if (step)
 241     {
 242       psim_step (simulator);
 243     }
 244   else
 245     {
 246       psim_run (simulator);
 247     }
 248 }
 249
 250 void
 251 sim_do_command (SIM_DESC sd, char *cmd)
 252 {
 253   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 254                     cmd ? cmd : "(null)"));
 255   if (cmd != NULL) {
 256     char **argv = buildargv(cmd);
 257     psim_command(root_device, argv);
 258     freeargv(argv);
 259   }
 260 }
 261
 262
 263 /* Polling, if required */
 264
 265 void
 266 sim_io_poll_quit (void)
 267 {
 268   if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
 269     {
 270       poll_quit_count = POLL_QUIT_INTERVAL;
 271       if (callbacks->poll_quit (callbacks))
 272         psim_stop (simulator);
 273     }
 274 }
 275
 276
 277
 278 /* Map simulator IO operations onto the corresponding GDB I/O
 279    functions.
 280
 281    NB: Only a limited subset of operations are mapped across.  More
 282    advanced operations (such as dup or write) must either be mapped to
 283    one of the below calls or handled internally */
 284
 285 int
 286 sim_io_read_stdin(char *buf,
 287                   int sizeof_buf)
 288 {
 289   switch (CURRENT_STDIO) {
 290   case DO_USE_STDIO:
 291     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 292     break;
 293   case DONT_USE_STDIO:
 294     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 295     break;
 296   default:
 297     error("sim_io_read_stdin: unaccounted switch\n");
 298     break;
 299   }
 300   return 0;
 301 }
 302
 303 int
 304 sim_io_write_stdout(const char *buf,
 305                     int sizeof_buf)
 306 {
 307   switch (CURRENT_STDIO) {
 308   case DO_USE_STDIO:
 309     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 310     break;
 311   case DONT_USE_STDIO:
 312     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 313     break;
 314   default:
 315     error("sim_io_write_stdout: unaccounted switch\n");
 316     break;
 317   }
 318   return 0;
 319 }
 320
 321 int
 322 sim_io_write_stderr(const char *buf,
 323                     int sizeof_buf)
 324 {
 325   switch (CURRENT_STDIO) {
 326   case DO_USE_STDIO:
 327     /* NB: I think there should be an explicit write_stderr callback */
 328     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 329     break;
 330   case DONT_USE_STDIO:
 331     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 332     break;
 333   default:
 334     error("sim_io_write_stderr: unaccounted switch\n");
 335     break;
 336   }
 337   return 0;
 338 }
 339
 340
 341 void
 342 sim_io_printf_filtered(const char *fmt,
 343                        ...)
 344 {
 345   char message[1024];
 346   va_list ap;
 347   /* format the message */
 348   va_start(ap, fmt);
 349   vsprintf(message, fmt, ap);
 350   va_end(ap);
 351   /* sanity check */
 352   if (strlen(message) >= sizeof(message))
 353     error("sim_io_printf_filtered: buffer overflow\n");
 354   callbacks->printf_filtered(callbacks, "%s", message);
 355 }
 356
 357 void
 358 sim_io_flush_stdoutput(void)
 359 {
 360   switch (CURRENT_STDIO) {
 361   case DO_USE_STDIO:
 362     callbacks->flush_stdout (callbacks);
 363     break;
 364   case DONT_USE_STDIO:
 365     break;
 366   default:
 367     error("sim_io_read_stdin: unaccounted switch\n");
 368     break;
 369   }
 370 }
 371
 372 void
 373 sim_io_error (SIM_DESC sd, const char *fmt, ...)
 374 {
 375   va_list ap;
 376   va_start(ap, fmt);
 377   callbacks->evprintf_filtered (callbacks, fmt, ap);
 378   va_end(ap);
 379   callbacks->error (callbacks, "");
 380 }
 381
 382 /****/
 383
 384 void *
 385 zalloc(long size)
 386 {
 387   void *memory = (void*)xmalloc(size);
 388   if (memory == NULL)
 389     error("xmalloc failed\n");
 390   memset(memory, 0, size);
 391   return memory;
 392 }
 393
 394 void zfree(void *data)
 395 {
 396   free(data);
 397 }